From 3d0386f27ca66379acf50199e1d1298386eeeeb8 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 02:55:53 +0200 Subject: Adding upstream version 3.2.1. Signed-off-by: Daniel Baumann --- modules/README.rst | 331 ++++++++ modules/bogus_log/README.rst | 41 + modules/bogus_log/bogus_log.c | 150 ++++ modules/bogus_log/bogus_log.mk | 8 + modules/bogus_log/test.integr/deckard.yaml | 13 + modules/bogus_log/test.integr/kresd_config.j2 | 82 ++ .../test.integr/val_minimal_expiredsignature.rpl | 124 +++ modules/cookies/README.rst | 54 ++ modules/cookies/cookiectl.c | 684 +++++++++++++++++ modules/cookies/cookiectl.h | 47 ++ modules/cookies/cookiemonster.c | 469 ++++++++++++ modules/cookies/cookiemonster.h | 27 + modules/cookies/cookies.c | 100 +++ modules/cookies/cookies.mk | 8 + modules/daf/README.rst | 137 ++++ modules/daf/daf.js | 294 ++++++++ modules/daf/daf.lua | 353 +++++++++ modules/daf/daf.mk | 3 + modules/detect_time_jump/README.rst | 20 + modules/detect_time_jump/detect_time_jump.lua | 44 ++ modules/detect_time_jump/detect_time_jump.mk | 2 + modules/detect_time_skew/README.rst | 21 + modules/detect_time_skew/detect_time_skew.lua | 85 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create mode 100644 modules/view/addr.test.integr/module_view_addr.rpl create mode 100644 modules/view/tsig.test.integr/deckard.yaml create mode 100644 modules/view/tsig.test.integr/kresd_config.j2 create mode 100644 modules/view/tsig.test.integr/module_view_tsig.rpl create mode 100644 modules/view/view.lua create mode 100644 modules/view/view.mk create mode 100644 modules/workarounds/README.rst create mode 100644 modules/workarounds/workarounds.lua create mode 100644 modules/workarounds/workarounds.mk (limited to 'modules') diff --git a/modules/README.rst b/modules/README.rst new file mode 100644 index 0000000..5d38f0f --- /dev/null +++ b/modules/README.rst @@ -0,0 +1,331 @@ +.. _modules-api: + +********************* +Modules API reference +********************* + +.. contents:: + :depth: 1 + :local: + +Supported languages +=================== + +Currently modules written in C and LuaJIT are supported. +There is also a support for writing modules in Go 1.5+ |---| the library has no native Go bindings, library is accessible using CGO_. + +The anatomy of an extension +=========================== + +A module is a shared object or script defining specific functions, here's an overview. + +*Note* |---| the :ref:`Modules ` header documents the module loading and API. + +.. csv-table:: + :header: "C/Go", "Lua", "Params", "Comment" + + "``X_api()`` [#]_", "", "", "API version" + "``X_init()``", "``X.init()``", "``module``", "Constructor" + "``X_deinit()``", "``X.deinit()``", "``module, key``", "Destructor" + "``X_config()``", "``X.config()``", "``module``", "Configuration" + "``X_layer()``", "``X.layer``", "``module``", ":ref:`Module layer `" + "``X_props()``", "", "", "List of properties" + +.. [#] Mandatory symbol. + +The ``X`` corresponds to the module name, if the module name is ``hints``, then the prefix for constructor would be ``hints_init()``. +This doesn't apply for Go, as it for now always implements `main` and requires capitalized first letter in order to export its symbol. + +.. note:: + The resolution context :c:type:`struct kr_context` holds loaded modules for current context. A module can be registered with :c:func:`kr_context_register`, which triggers module constructor *immediately* after the load. Module destructor is automatically called when the resolution context closes. + + If the module exports a layer implementation, it is automatically discovered by :c:func:`kr_resolver` on resolution init and plugged in. The order in which the modules are registered corresponds to the call order of layers. + +Writing a module in Lua +======================= + +The probably most convenient way of writing modules is Lua since you can use already installed modules +from system and have first-class access to the scripting engine. You can also tap to all the events, that +the C API has access to, but keep in mind that transitioning from the C to Lua function is slower than +the other way round. + +.. note:: The Lua functions retrieve an additional first parameter compared to the C counterparts - a "state". + There is no Lua wrapper for C structures used in the resolution context, until they're implemented + you can inspect the structures using the `ffi `_ library. + +The modules follow the `Lua way `_, where the module interface is returned in a named table. + +.. code-block:: lua + + --- @module Count incoming queries + local counter = {} + + function counter.init(module) + counter.total = 0 + counter.last = 0 + counter.failed = 0 + end + + function counter.deinit(module) + print('counted', counter.total, 'queries') + end + + -- @function Run the q/s counter with given interval. + function counter.config(conf) + -- We can use the scripting facilities here + if counter.ev then event.cancel(counter.ev) + event.recurrent(conf.interval, function () + print(counter.total - counter.last, 'q/s') + counter.last = counter.total + end) + end + + return counter + +.. tip:: The API functions may return an integer value just like in other languages, but they may also return a coroutine that will be continued asynchronously. A good use case for this approach is is a deferred initialization, e.g. loading a chunks of data or waiting for I/O. + +.. code-block:: lua + + function counter.init(module) + counter.total = 0 + counter.last = 0 + counter.failed = 0 + return coroutine.create(function () + for line in io.lines('/etc/hosts') do + load(module, line) + coroutine.yield() + end + end) + end + +The created module can be then loaded just like any other module, except it isn't very useful since it +doesn't provide any layer to capture events. The Lua module can however provide a processing layer, just +:ref:`like its C counterpart `. + +.. code-block:: lua + + -- Notice it isn't a function, but a table of functions + counter.layer = { + begin = function (state, data) + counter.total = counter.total + 1 + return state + end, + finish = function (state, req, answer) + if state == kres.FAIL then + counter.failed = counter.failed + 1 + end + return state + end + } + +There is currently an additional "feature" in comparison to C layer functions: +the ``consume``, ``produce`` and ``checkout`` functions do not get called at all +if ``state == kres.FAIL``; +note that ``answer_finalize`` and ``finish`` get called nevertheless. + +Since the modules are like any other Lua modules, you can interact with them through the CLI and and any interface. + +.. tip:: The module can be placed anywhere in the Lua search path, in the working directory or in the MODULESDIR. + +Writing a module in C +===================== + +As almost all the functions are optional, the minimal module looks like this: + +.. code-block:: c + + #include "lib/module.h" + /* Convenience macro to declare module API. */ + KR_MODULE_EXPORT(mymodule) + + +Let's define an observer thread for the module as well. It's going to be stub for the sake of brevity, +but you can for example create a condition, and notify the thread from query processing by declaring +module layer (see the :ref:`Writing layers `). + +.. code-block:: c + + static void* observe(void *arg) + { + /* ... do some observing ... */ + } + + int mymodule_init(struct kr_module *module) + { + /* Create a thread and start it in the background. */ + pthread_t thr_id; + int ret = pthread_create(&thr_id, NULL, &observe, NULL); + if (ret != 0) { + return kr_error(errno); + } + + /* Keep it in the thread */ + module->data = thr_id; + return kr_ok(); + } + + int mymodule_deinit(struct kr_module *module) + { + /* ... signalize cancellation ... */ + void *res = NULL; + pthread_t thr_id = (pthread_t) module->data; + int ret = pthread_join(thr_id, res); + if (ret != 0) { + return kr_error(errno); + } + + return kr_ok(); + } + +This example shows how a module can run in the background, this enables you to, for example, observe +and publish data about query resolution. + +Writing a module in Go +====================== + +The Go modules use CGO_ to interface C resolver library, there are no native bindings yet. Second issue is that layers are declared as a structure of function pointers, which are `not present in Go`_, the workaround is to declare them in CGO_ header. Each module must be the ``main`` package, here's a minimal example: + +.. code-block:: go + + package main + + /* + #include "lib/module.h" + */ + import "C" + import "unsafe" + + /* Mandatory functions */ + + //export mymodule_api + func mymodule_api() C.uint32_t { + return C.KR_MODULE_API + } + func main() {} + +.. warning:: Do not forget to prefix function declarations with ``//export symbol_name``, as only these will be exported in module. + +In order to integrate with query processing, you have to declare a helper function with function pointers to the +the layer implementation. Since the code prefacing ``import "C"`` is expanded in headers, you need the `static inline` trick +to avoid multiple declarations. Here's how the preface looks like: + +.. code-block:: go + + /* + #include "lib/layer.h" + #include "lib/module.h" + // Need a forward declaration of the function signature + int finish(kr_layer_t *); + // Workaround for layers composition + static inline const kr_layer_api_t *_layer(void) + { + static const kr_layer_api_t api = { + .finish = &finish + }; + return &api; + } + */ + import "C" + import "unsafe" + +Now we can add the implementations for the ``finish`` layer and finalize the module: + +.. code-block:: go + + //export finish + func finish(ctx *C.kr_layer_t) C.int { + // Since the context is unsafe.Pointer, we need to cast it + var param *C.struct_kr_request = (*C.struct_kr_request)(ctx.data) + // Now we can use the C API as well + fmt.Printf("[go] resolved %d queries\n", C.list_size(¶m.rplan.resolved)) + return 0 + } + + //export mymodule_layer + func mymodule_layer(module *C.struct_kr_module) *C.kr_layer_api_t { + // Wrapping the inline trampoline function + return C._layer() + } + +See the CGO_ for more information about type conversions and interoperability between the C/Go. + +Gotchas +------- + +* ``main()`` function is mandatory in each module, otherwise it won't compile. +* Module layer function implementation must be done in C during ``import "C"``, as Go doesn't support pointers to functions. +* The library doesn't have a Go-ified bindings yet, so interacting with it requires CGO shims, namely structure traversal and type conversions (strings, numbers). +* Other modules can be called through C call ``C.kr_module_call(kr_context, module_name, module_propery, input)`` + +Configuring modules +=================== + +There is a callback ``X_config()`` that you can implement, see hints module. + +.. _mod-properties: + +Exposing C/Go module properties +=============================== + +A module can offer NULL-terminated list of *properties*, each property is essentially a callable with free-form JSON input/output. +JSON was chosen as an interchangeable format that doesn't require any schema beforehand, so you can do two things - query the module properties +from external applications or between modules (i.e. `statistics` module can query `cache` module for memory usage). +JSON was chosen not because it's the most efficient protocol, but because it's easy to read and write and interface to outside world. + +.. note:: The ``void *env`` is a generic module interface. Since we're implementing daemon modules, the pointer can be cast to ``struct engine*``. + This is guaranteed by the implemented API version (see `Writing a module in C`_). + +Here's an example how a module can expose its property: + +.. code-block:: c + + char* get_size(void *env, struct kr_module *m, + const char *args) + { + /* Get cache from engine. */ + struct engine *engine = env; + struct kr_cache *cache = &engine->resolver.cache; + /* Read item count */ + int count = (cache->api)->count(cache->db); + char *result = NULL; + asprintf(&result, "{ \"result\": %d }", count); + + return result; + } + + struct kr_prop *cache_props(void) + { + static struct kr_prop prop_list[] = { + /* Callback, Name, Description */ + {&get_size, "get_size", "Return number of records."}, + {NULL, NULL, NULL} + }; + return prop_list; + } + + KR_MODULE_EXPORT(cache) + +Once you load the module, you can call the module property from the interactive console. +*Note* |---| the JSON output will be transparently converted to Lua tables. + +.. code-block:: bash + + $ kresd + ... + [system] started in interactive mode, type 'help()' + > modules.load('cached') + > cached.get_size() + [size] => 53 + +*Note* |---| this relies on function pointers, so the same ``static inline`` trick as for the ``Layer()`` is required for C/Go. + +Special properties +------------------ + +If the module declares properties ``get`` or ``set``, they can be used in the Lua interpreter as +regular tables. + +.. _`not present in Go`: http://blog.golang.org/gos-declaration-syntax +.. _CGO: http://golang.org/cmd/cgo/ + +.. |---| unicode:: U+02014 .. em dash diff --git a/modules/bogus_log/README.rst b/modules/bogus_log/README.rst new file mode 100644 index 0000000..0b93e82 --- /dev/null +++ b/modules/bogus_log/README.rst @@ -0,0 +1,41 @@ +.. _mod-bogus_log: + +DNSSEC validation failure logging +--------------------------------- + +This module adds error message for each DNSSEC validation failure. +It is meant to provide hint to operators which queries should be +investigated using diagnostic tools like DNSViz_. + +Add following line to your configuration file to enable it: + +.. code-block:: lua + + modules.load('bogus_log') + +Example of error message logged by this module: + +.. code-block:: none + + DNSSEC validation failure dnssec-failed.org. DNSKEY + +.. _DNSViz: http://dnsviz.net/ + +List of most frequent queries which fail as DNSSEC bogus can be obtained at run-time: + +.. code-block:: lua + + > bogus_log.frequent() + [1] => { + [type] => DNSKEY + [count] => 1 + [name] => dnssec-failed.org. + } + [2] => { + [type] => DNSKEY + [count] => 13 + [name] => rhybar.cz. + } + +Please note that in future this module might be replaced +with some other way to log this information. diff --git a/modules/bogus_log/bogus_log.c b/modules/bogus_log/bogus_log.c new file mode 100644 index 0000000..98c0fc9 --- /dev/null +++ b/modules/bogus_log/bogus_log.c @@ -0,0 +1,150 @@ +/* Copyright (C) Knot Resolver contributors. Licensed under GNU GPLv3 or + * (at your option) any later version. See COPYING for text of the license. + * + * This module logs (query name, type) pairs which failed DNSSEC validation. */ + +#include +#include +#include +#include + +#include "daemon/engine.h" +#include "lib/layer.h" +#include "lib/generic/lru.h" + +/** @internal Compatibility wrapper for Lua < 5.2 */ +#if LUA_VERSION_NUM < 502 +#define lua_rawlen(L, obj) lua_objlen((L), (obj)) +#endif + +#ifdef LRU_REP_SIZE + #define FREQUENT_COUNT LRU_REP_SIZE /* Size of frequent tables */ +#else + #define FREQUENT_COUNT 5000 /* Size of frequent tables */ +#endif + +/** @internal LRU hash of most frequent names. */ +typedef lru_t(unsigned) namehash_t; + +/** @internal Stats data structure. */ +struct stat_data { + namehash_t *frequent; +}; + +static int consume(kr_layer_t *ctx, knot_pkt_t *pkt) +{ + if (!(ctx->state & KR_STATE_FAIL) + || !ctx->req + || !ctx->req->current_query + || !ctx->req->current_query->flags.DNSSEC_BOGUS + || knot_wire_get_qdcount(pkt->wire) != 1) + return ctx->state; + + auto_free char *qname_text = kr_dname_text(knot_pkt_qname(pkt)); + auto_free char *qtype_text = kr_rrtype_text(knot_pkt_qtype(pkt)); + + kr_log_error("DNSSEC validation failure %s %s\n", qname_text, qtype_text); + + /* log of most frequent bogus queries */ + uint16_t type = knot_pkt_qtype(pkt); + char key[sizeof(type) + KNOT_DNAME_MAXLEN]; + memcpy(key, &type, sizeof(type)); + int key_len = knot_dname_to_wire((uint8_t *)key + sizeof(type), knot_pkt_qname(pkt), KNOT_DNAME_MAXLEN); + if (key_len >= 0) { + struct kr_module *module = ctx->api->data; + struct stat_data *data = module->data; + unsigned *count = lru_get_new(data->frequent, key, key_len+sizeof(type), NULL); + if (count) + *count += 1; + } + + return ctx->state; +} + +/** @internal Helper for dump_list: add a single namehash_t item to JSON. */ +static enum lru_apply_do dump_value(const char *key, uint len, unsigned *val, void *baton) +{ + uint16_t key_type = 0; + /* Extract query name, type and counter */ + memcpy(&key_type, key, sizeof(key_type)); + KR_DNAME_GET_STR(key_name, (uint8_t *)key + sizeof(key_type)); + KR_RRTYPE_GET_STR(type_str, key_type); + + /* Convert to JSON object */ + JsonNode *json_val = json_mkobject(); + json_append_member(json_val, "count", json_mknumber(*val)); + json_append_member(json_val, "name", json_mkstring(key_name)); + json_append_member(json_val, "type", json_mkstring(type_str)); + json_append_element((JsonNode *)baton, json_val); + return LRU_APPLY_DO_NOTHING; // keep the item +} + +/** + * List frequent names. + * + * Output: [{ count: , name: , type: }, ... ] + */ +static char* dump_list(void *env, struct kr_module *module, const char *args, namehash_t *table) +{ + if (!table) { + return NULL; + } + JsonNode *root = json_mkarray(); + lru_apply(table, dump_value, root); + char *ret = json_encode(root); + json_delete(root); + return ret; +} + +static char* dump_frequent(void *env, struct kr_module *module, const char *args) +{ + struct stat_data *data = module->data; + return dump_list(env, module, args, data->frequent); +} + +KR_EXPORT +int bogus_log_init(struct kr_module *module) +{ + struct stat_data *data = malloc(sizeof(*data)); + if (!data) { + return kr_error(ENOMEM); + } + memset(data, 0, sizeof(*data)); + module->data = data; + lru_create(&data->frequent, FREQUENT_COUNT, NULL, NULL); + return kr_ok(); +} + +KR_EXPORT +int bogus_log_deinit(struct kr_module *module) +{ + struct stat_data *data = module->data; + if (data) { + lru_free(data->frequent); + free(data); + } + return kr_ok(); +} + + +KR_EXPORT +const kr_layer_api_t *bogus_log_layer(struct kr_module *module) +{ + static kr_layer_api_t _layer = { + .consume = &consume, + }; + _layer.data = module; + return &_layer; +} + +KR_EXPORT +struct kr_prop *bogus_log_props(void) +{ + static struct kr_prop prop_list[] = { + { &dump_frequent, "frequent", "List most frequent queries.", }, + { NULL, NULL, NULL } + }; + return prop_list; +} + +KR_MODULE_EXPORT(bogus_log) diff --git a/modules/bogus_log/bogus_log.mk b/modules/bogus_log/bogus_log.mk new file mode 100644 index 0000000..7431b19 --- /dev/null +++ b/modules/bogus_log/bogus_log.mk @@ -0,0 +1,8 @@ +bogus_log_CFLAGS := -fPIC +# We use a symbol that's not in libkres but the daemon. +# On darwin this isn't accepted by default. +bogus_log_LDFLAGS := -Wl,-undefined -Wl,dynamic_lookup +bogus_log_SOURCES := modules/bogus_log/bogus_log.c +bogus_log_DEPEND := $(libkres) +bogus_log_LIBS := $(contrib_TARGET) $(libkres_TARGET) $(libkres_LIBS) +$(call make_c_module,bogus_log) diff --git a/modules/bogus_log/test.integr/deckard.yaml b/modules/bogus_log/test.integr/deckard.yaml new file mode 100644 index 0000000..a8c8700 --- /dev/null +++ b/modules/bogus_log/test.integr/deckard.yaml @@ -0,0 +1,13 @@ +programs: +- name: kresd + binary: kresd + additional: + - -f + - "1" + templates: + - modules/bogus_log/test.integr/kresd_config.j2 + - tests/hints_zone.j2 + configs: + - config + - hints +noclean: True diff --git a/modules/bogus_log/test.integr/kresd_config.j2 b/modules/bogus_log/test.integr/kresd_config.j2 new file mode 100644 index 0000000..6e3dc09 --- /dev/null +++ b/modules/bogus_log/test.integr/kresd_config.j2 @@ -0,0 +1,82 @@ +{% for TAF in TRUST_ANCHOR_FILES %} +trust_anchors.add_file('{{TAF}}') +{% endfor %} + +{% raw %} +modules.load('bogus_log') + +function check_stats(got) + log('checking if bogus_log.frequent values match expected values:') + local expected = { + [1] = { + ['type'] = 'DNSKEY', + ['count'] = 2, + ['name'] = '.', + } + } + print(table_print(expected)) + + if table_print(expected) == table_print(got) then + log('no problem found') + return policy.DENY_MSG('Ok') + else + log('mismatch!') + return policy.DENY_MSG('bogus_log.frequent mismatch, see logs') + end +end + +function reply_result(state, req) + local got = bogus_log.frequent() + log('current bogus_log.frequent() values:') + print(table_print(got)) + local result = check_stats(got) + return result(state, req) +end +policy.add(policy.pattern(reply_result, 'bogus_log.test.')) + +-- Disable RFC8145 signaling, scenario doesn't provide expected answers +if ta_signal_query then + modules.unload('ta_signal_query') +end + +-- Disable RFC8109 priming, scenario doesn't provide expected answers +if priming then + modules.unload('priming') +end + +-- Disable this module because it make one priming query +if detect_time_skew then + modules.unload('detect_time_skew') +end + +_hint_root_file('hints') +cache.size = 2*MB +verbose(true) +{% endraw %} + +net = { '{{SELF_ADDR}}' } + + +{% if QMIN == "false" %} +option('NO_MINIMIZE', true) +{% else %} +option('NO_MINIMIZE', false) +{% endif %} + + +-- Self-checks on globals +assert(help() ~= nil) +assert(worker.id ~= nil) +-- Self-checks on facilities +assert(cache.count() == 0) +assert(cache.stats() ~= nil) +assert(cache.backends() ~= nil) +assert(worker.stats() ~= nil) +assert(net.interfaces() ~= nil) +-- Self-checks on loaded stuff +assert(net.list()['{{SELF_ADDR}}']) +assert(#modules.list() > 0) +-- Self-check timers +ev = event.recurrent(1 * sec, function (ev) return 1 end) +event.cancel(ev) +ev = event.after(0, function (ev) return 1 end) diff --git a/modules/bogus_log/test.integr/val_minimal_expiredsignature.rpl b/modules/bogus_log/test.integr/val_minimal_expiredsignature.rpl new file mode 100644 index 0000000..d0a616b --- /dev/null +++ b/modules/bogus_log/test.integr/val_minimal_expiredsignature.rpl @@ -0,0 +1,124 @@ + trust-anchor: ". IN DS 49060 8 2 E7B1EB56D7D5791B3D45630FEAA9C823DB84B385ACEEAC5F44DD08885C36700F" + val-override-date: "20170410000000" + stub-addr: 193.0.14.129 # K.ROOT-SERVERS.NET. + query-minimization: off +CONFIG_END + +SCENARIO_BEGIN Date after expiration of signatures. + +; K.ROOT-SERVERS.NET. +RANGE_BEGIN 0 100 + ADDRESS 193.0.14.129 + ADDRESS 2001:7fd::1 +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR AA NOERROR +SECTION QUESTION +. IN NS +SECTION ANSWER +. 518400 IN NS k.root-servers.net. +. 518400 IN RRSIG NS 8 0 518400 20170409093827 20170310093827 20661 . uBuJpbRh1NYVciSKK0r3SA6NFnqE4s/+CqLfTXu26/HrY5c1aOhQHXZM cCDDjfPGFa7Eh4mqF0i9I+i+bFbYQitI1Heexye599VE19REbVsK4qaU xkArvt9k6HVqd/7BXXUyzLN1N0CScdyuT5tiEI9154SDNVpnC+z8i2u0 9hW8JEk4qqVWX/I1MYQB/UOcFSeDhD1Qku/26opqDuLl/1eaShxhMQ/c rjzOb5ZYzD0x+TUJZMYSOMwAraaFuYTT84oe6QYY+EGctAk1b50nA/5E C3Tm/xGuo9ioVtYhTwoo1XDUVeHmghdILjQZvR4pOSZoRGGP9ovb08Qg OmPXuQ== +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR AA NOERROR +SECTION QUESTION +. IN DNSKEY +SECTION ANSWER +. IN DNSKEY 256 3 8 AwEAAe1oA46eOLNris1CtS0qM5TdMESK6i4hpalqa6JDv57eOUkaOeje ZW1tIFUokmaK7kuKEFEosddA89CYM8rt2RbC+sfKalbHAWOus0tXZyAL efb2sW95QRzyG6LNul0jQFn9eYWBUHrVe5Wqd0zrFCbTQLUhELSfrlkI UBpO/xKaGinRHX2JjyOnle4aPZY3bEVa/+KyY2ZU6UC4SBo3aHXanP26 ok91rOTmpTWp64ybsMdCXOU8deyuQFQf6q8DhIDmJrkymhX1MXWQQlE0 fAYIYf8/t9OCwucg8oEg4FPU8Gb4Zm/l6PgO4HFkFjBT6iGFCQt3qXe2 Qe3alUWoATc= +. IN DNSKEY 257 3 8 AwEAAb8sZgVVa02muJ+/+SVhJAvz2EWKGEGquhPbQXuF6ALBYoF4KWTO bZVF8sIVTGoaX5+UWkwwHthg7RwS1DALT/AJymYeHhUwA04gLsfCZ/cv BjmRy5RozeSJ1uxAhoCYHCT2hQBZ0cH0n8roXFXI2Y+6708pO1IBkTPT 9MpAGfezTtGYOortbSn+vqT/Zu8jOpNwkleXON4rlZRBZPd4JUMGL9Y5 N/j6+ClYeM+eFQTKXrLi1oC+0yK1sG5OlqrBDhAhBnz+IhfZz4TOkqJ9 Li2BVMatHBeB9GQHtu0FZuC3J0EQgiZxvq1RgkefFJAiB+5uVRN8U7up 5mLDxSgmT0M= +. 2592000 IN RRSIG DNSKEY 8 0 3600000 20170409093827 20170310093827 49060 . G7s3QiWNgOsl+LoG6OKjdBHPcFyhmCS17GFnaKjfJNdPQaFL5nM/vrXo eUIIdJXAvjj62TY7wTyFlnx3yjK93RVGKEEySpGC/1gkn5AdjVoQszog IxYjKzubizULSaX7SQ3/Ar+uHLxakdS1qgNdFu6hHCl857LJPtmC8SJt iFUmm5HFyARokMrfA88VrFRKEqojcCWajeZMfRtgBipFJZoYgPUCaFlz 8OupNdNUWCbGhnDWrXCWMzeKVXTQVlJf75PXXgtkuBUmr5RSWu7AYr+c wTJ4E4610goRqYxnZ33efKE/MuhKeY66xelPh0sirPrBMR5JAlyjV3k1 qDzhcQ== +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR AA NOERROR +SECTION QUESTION +k.root-servers.net. IN AAAA +SECTION ANSWER +k.root-servers.net. 3600000 IN AAAA 2001:7fd::1 +k.root-servers.net. 2592000 IN RRSIG AAAA 8 3 3600000 20170409093827 20170310093827 20661 . qjVXwuxzmoRhdrXyQvKfrrzFxGiYuTTJHxwZPasJ1nVmN48dPyU6wA55 JeqoJv1Jm+XvIL1q0WtX6Zh6KLt6vVjHuMkhmFuIZYkFi/dmsEwFY8C0 ebyXyztQT5+6FOSVTAKacYc40LfBo8FqEn8RYlCu1mkAd8ANvvLrdLWW W03LVOY7JlCzyrKlAlmPmuV8z+e9PxNkUh6KfTEvAReoAAX7wYZkdefg 2d64c7rNWXvYm6LxBX6qeQ39d5WyKc8v+G01DJuDzs2Tx368QoK86vm/ qo9ERdT7koRt+gBZNYv8V4fh2SjaFsy2TJq/tiYcSia9snGDTFj6LWVM 6sBCYQ== +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR AA NOERROR +SECTION QUESTION +k.root-servers.net. IN A +SECTION ANSWER +k.root-servers.net. 3600000 IN A 193.0.14.129 +k.root-servers.net. 2592000 IN RRSIG A 8 3 3600000 20170409093827 20170310093827 20661 . feIXXjskcsyH+ALZu67GVDaPWXjUGTWsTlDwzgJcLBzSuRVY/GVD5Z1Q B4/oUW99rLKB5bNS1MuasZ+nZFV67sBwJk1+SqNB2bAe7G5Tv1sR2Qgi qDAoB37YDVk5JGHfuxByLYbAVG9PrPXT60BN17OYrD/TFPzprye65gk3 7l9kPpAlblcsqdvh5piKrWc7VBcyMhlp56qdASNAl+Lrb+i0DZYyJXh+ b8LV5g5zp9FaVGKe0Gi4+yDXVjcM6VEtuNRAu2+flLoc3ho6qQF1Po4Y wueL72I+yFoUxkIOJvK47eWb+YUBIBK/L8/ORjYoLBRsrbc79wb0I3Zj Xy6O4Q== +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype +ADJUST copy_id copy_query +REPLY QR AA REFUSED +SECTION QUESTION +. IN RRSIG +SECTION ANSWER +ENTRY_END +RANGE_END + +STEP 1 QUERY +ENTRY_BEGIN +REPLY RD DO +SECTION QUESTION +. IN NS +ENTRY_END + + +STEP 10 CHECK_ANSWER +ENTRY_BEGIN +MATCH all +REPLY QR RD RA DO SERVFAIL +SECTION QUESTION +. IN NS +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +ENTRY_END + +STEP 11 QUERY +ENTRY_BEGIN +REPLY RD DO +SECTION QUESTION +. IN NS +ENTRY_END + +STEP 12 CHECK_ANSWER +ENTRY_BEGIN +MATCH all +REPLY QR RD RA DO SERVFAIL +SECTION QUESTION +. IN NS +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +ENTRY_END + +STEP 20 QUERY +ENTRY_BEGIN +REPLY RD DO +SECTION QUESTION +bogus_log.test. IN TXT +ENTRY_END + +STEP 21 CHECK_ANSWER +ENTRY_BEGIN +MATCH all +REPLY QR AA RD RA DO NXDOMAIN +SECTION QUESTION +bogus_log.test. IN TXT +SECTION AUTHORITY +bogus_log.test. 10800 IN SOA bogus_log.test. nobody.invalid. 1 3600 1200 604800 10800 +SECTION ADDITIONAL +explanation.invalid. 10800 IN TXT "Ok" +ENTRY_END + +SCENARIO_END diff --git a/modules/cookies/README.rst b/modules/cookies/README.rst new file mode 100644 index 0000000..5db476c --- /dev/null +++ b/modules/cookies/README.rst @@ -0,0 +1,54 @@ +.. _mod-cookies: + +DNS Cookies +----------- + +The module performs most of the :rfc:`7873` DNS cookies functionality. Its main purpose is to check the cookies of inbound queries and responses. It is also used to alter the behaviour of the cookie functionality. + +Example Configuration +^^^^^^^^^^^^^^^^^^^^^ + +.. code-block:: lua + + -- Load the module before the 'iterate' layer. + modules = { + 'cookies < iterate' + } + + -- Configure the client part of the resolver. Set 8 bytes of the client + -- secret and choose the hashing algorithm to be used. + -- Use a string composed of hexadecimal digits to set the secret. + cookies.config { client_secret = '0123456789ABCDEF', + client_cookie_alg = 'FNV-64' } + + -- Configure the server part of the resolver. + cookies.config { server_secret = 'FEDCBA9876543210', + server_cookie_alg = 'FNV-64' } + + -- Enable client cookie functionality. (Add cookies into outbound + -- queries.) + cookies.config { client_enabled = true } + + -- Enable server cookie functionality. (Handle cookies in inbound + -- requests.) + cookies.config { server_enabled = true } + +.. tip:: If you want to change several parameters regarding the client or server configuration then do it within a single ``cookies.config()`` invocation. + +.. warning:: The module must be loaded before any other module that has direct influence on query processing and response generation. The module must be able to intercept an incoming query before the processing of the actual query starts. It must also be able to check the cookies of inbound responses and eventually discard them before they are handled by other functional units. + +Properties +^^^^^^^^^^ + +.. function:: cookies.config(configuration) + + :param table configuration: part of cookie configuration to be changed, may be called without parameter + :return: JSON dictionary containing current configuration + + The function may be called without any parameter. In such case it only returns current configuration. The returned JSON also contains available algorithm choices. + +Dependencies +^^^^^^^^^^^^ + +* `Nettle `_ required for HMAC-SHA256 + diff --git a/modules/cookies/cookiectl.c b/modules/cookies/cookiectl.c new file mode 100644 index 0000000..1af508b --- /dev/null +++ b/modules/cookies/cookiectl.c @@ -0,0 +1,684 @@ +/* Copyright (C) 2016-2017 CZ.NIC, z.s.p.o. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "lib/cookies/alg_containers.h" +#include "modules/cookies/cookiectl.h" + +#define NAME_CLIENT_ENABLED "client_enabled" +#define NAME_CLIENT_SECRET "client_secret" +#define NAME_CLIENT_COOKIE_ALG "client_cookie_alg" +#define NAME_AVAILABLE_CLIENT_COOKIE_ALGS "available_client_cookie_algs" + +#define NAME_SERVER_ENABLED "server_enabled" +#define NAME_SERVER_SECRET "server_secret" +#define NAME_SERVER_COOKIE_ALG "server_cookie_alg" +#define NAME_AVAILABLE_SERVER_COOKIE_ALGS "available_server_cookie_algs" + +/** + * @brief Initialises cookie control context. + * @param ctx cookie control context + */ +static void kr_cookie_ctx_init(struct kr_cookie_ctx *ctx) +{ + if (!ctx) { + return; + } + + memset(ctx, 0, sizeof(*ctx)); + + ctx->clnt.current.alg_id = ctx->clnt.recent.alg_id = -1; + ctx->srvr.current.alg_id = ctx->srvr.recent.alg_id = -1; +} + +/** + * @brief Check whether node holds proper 'enabled' value. + * @patam node JSON node holding the value + * @return true if value OK + */ +static bool enabled_ok(const JsonNode *node) +{ + assert(node); + + return node->tag == JSON_BOOL; +} + +/** + * @brief Check whether node holds proper 'secret' value. + * @patam node JSON node holding the value + * @return true if value OK + */ +static bool secret_ok(const JsonNode *node) +{ + assert(node); + + if (node->tag != JSON_STRING) { + return false; + } + + const char *hexstr = node->string_; + + size_t len = strlen(hexstr); + if ((len % 2) != 0) { + return false; + } + /* A check for minimal required length could also be performed. */ + + for (size_t i = 0; i < len; ++i) { + if (!isxdigit(tolower(hexstr[i]))) { + return false; + } + } + + return true; +} + +/** + * @brief Find hash function with given name. + * @param node JSON node holding the value + * @param table lookup table with algorithm names + * @return pointer to table entry or NULL on error if does not exist + */ +static const knot_lookup_t *hash_func_lookup(const JsonNode *node, + const knot_lookup_t table[]) +{ + if (!node || node->tag != JSON_STRING) { + return NULL; + } + + return knot_lookup_by_name(table, node->string_); +} + +/** + * @brief Creates a cookie secret structure. + * @param size size of the actual secret + * @param zero set to true if value should be cleared + * @return pointer to new structure, NULL on failure or if @size is zero + */ +static struct kr_cookie_secret *new_cookie_secret(size_t size, bool zero) +{ + if (size == 0) { + return NULL; + } + + struct kr_cookie_secret *sq = malloc(sizeof(*sq) + size); + if (!sq) { + return NULL; + } + + sq->size = size; + if (zero) { + memset(sq->data, 0, size); + } + return sq; +} + +/** + * @brief Clone a cookie secret. + * @param sec secret to be cloned + * @return pointer to new structure, NULL on failure or if @size is zero + */ +static struct kr_cookie_secret *clone_cookie_secret(const struct kr_cookie_secret *sec) +{ + if (!sec || sec->size == 0) { + return NULL; + } + + struct kr_cookie_secret *sq = malloc(sizeof(*sq) + sec->size); + if (!sq) { + return NULL; + } + + sq->size = sec->size; + memcpy(sq->data, sec->data, sq->size); + return sq; +} + +static int hexchar2val(int d) +{ + if (('0' <= d) && (d <= '9')) { + return d - '0'; + } else if (('a' <= d) && (d <= 'f')) { + return d - 'a' + 0x0a; + } else { + return -1; + } +} + +static int hexval2char(int i) +{ + if ((0 <= i) && (i <= 9)) { + return i + '0'; + } else if ((0x0a <= i) && (i <= 0x0f)) { + return i - 0x0a + 'A'; + } else { + return -1; + } +} + +/** + * @brief Converts string containing two-digit hexadecimal number into int. + * @param hexstr hexadecimal string + * @return -1 on error, value from 0 to 255 else. + */ +static int hexbyte2int(const char *hexstr) +{ + if (!hexstr) { + return -1; + } + + int dhi = tolower(hexstr[0]); + if (!isxdigit(dhi)) { + /* Exit also on empty string. */ + return -1; + } + int dlo = tolower(hexstr[1]); + if (!isxdigit(dlo)) { + return -1; + } + + dhi = hexchar2val(dhi); + assert(dhi != -1); + dlo = hexchar2val(dlo); + assert(dlo != -1); + + return (dhi << 4) | dlo; +} + +/** + * @brief Writes two hexadecimal digits (two byes) into given memory location. + * @param tgt target location + * @param i number from 0 to 255 + * @return 0 on success, -1 on failure + */ +static int int2hexbyte(char *tgt, int i) +{ + if (!tgt || i < 0x00 || i > 0xff) { + return -1; + } + + int ilo = hexval2char(i & 0x0f); + assert(ilo != -1); + int ihi = hexval2char((i >> 4) & 0x0f); + assert(ihi != -1); + + tgt[0] = ihi; + tgt[1] = ilo; + + return 0; +} + +/** + * @brief Reads a string containing hexadecimal values. + * @note String must consist of hexadecimal digits only and must have even + * non-zero length. + */ +static struct kr_cookie_secret *new_sq_from_hexstr(const char *hexstr) +{ + if (!hexstr) { + return NULL; + } + + size_t len = strlen(hexstr); + if ((len % 2) != 0) { + return NULL; + } + + struct kr_cookie_secret *sq = new_cookie_secret(len / 2, false); + if (!sq) { + return NULL; + } + + uint8_t *data = sq->data; + for (size_t i = 0; i < len; i += 2) { + int num = hexbyte2int(hexstr + i); + if (num == -1) { + free(sq); + return NULL; + } + assert(0x00 <= num && num <= 0xff); + *data = num; + ++data; + } + + return sq; +} + +/** + * @brief Creates new secret. + * @patam node JSON node holding the secret value + * @return pointer to newly allocated secret, NULL on error + */ +static struct kr_cookie_secret *create_secret(const JsonNode *node) +{ + if (!node) { + return NULL; + } + + if (node->tag != JSON_STRING) { + return NULL; + } + + return new_sq_from_hexstr(node->string_); +} + +/** + * @brief Check whether configuration node contains valid values. + */ +static bool configuration_node_ok(const JsonNode *node) +{ + assert(node); + + if (!node->key) { + /* All top most nodes must have names. */ + return false; + } + + if (strcmp(node->key, NAME_CLIENT_ENABLED) == 0) { + return enabled_ok(node); + } else if (strcmp(node->key, NAME_CLIENT_SECRET) == 0) { + return secret_ok(node); + } else if (strcmp(node->key, NAME_CLIENT_COOKIE_ALG) == 0) { + return hash_func_lookup(node, kr_cc_alg_names) != NULL; + } else if (strcmp(node->key, NAME_SERVER_ENABLED) == 0) { + return enabled_ok(node); + } else if (strcmp(node->key, NAME_SERVER_SECRET) == 0) { + return secret_ok(node); + } else if (strcmp(node->key, NAME_SERVER_COOKIE_ALG) == 0) { + return hash_func_lookup(node, kr_sc_alg_names) != NULL; + } + + return false; +} + +/** + * @brief Creates a new string from secret quantity. + * @param sq secret quantity + * @return newly allocated string or NULL on error + */ +static char *new_hexstr_from_sq(const struct kr_cookie_secret *sq) +{ + if (!sq) { + return NULL; + } + + char *new_str = malloc((sq->size * 2) + 1); + if (!new_str) { + return NULL; + } + + char *tgt = new_str; + for (size_t i = 0; i < sq->size; ++i) { + if (0 != int2hexbyte(tgt, sq->data[i])) { + free(new_str); + return NULL; + } + tgt += 2; + } + + *tgt = '\0'; + return new_str; +} + +static bool read_secret(JsonNode *root, const char *node_name, + const struct kr_cookie_secret *secret) +{ + assert(root && node_name && secret); + + char *secret_str = new_hexstr_from_sq(secret); + if (!secret_str) { + return false; + } + + JsonNode *str_node = json_mkstring(secret_str); + if (!str_node) { + free(secret_str); + return false; + } + + json_append_member(root, node_name, str_node); + + free(secret_str); + return true; +} + +static bool read_available_hashes(JsonNode *root, const char *root_name, + const knot_lookup_t table[]) +{ + assert(root && root_name && table); + + JsonNode *array = json_mkarray(); + if (!array) { + return false; + } + + const knot_lookup_t *aux_ptr = table; + while (aux_ptr && (aux_ptr->id >= 0) && aux_ptr->name) { + JsonNode *element = json_mkstring(aux_ptr->name); + if (!element) { + goto fail; + } + json_append_element(array, element); + ++aux_ptr; + } + + json_append_member(root, root_name, array); + + return true; + +fail: + if (array) { + json_delete(array); + } + return false; +} + +/** + * @brief Check whether new settings are different from the old ones. + */ +static bool is_modified(const struct kr_cookie_comp *running, + struct kr_cookie_secret *secr, + const knot_lookup_t *alg_lookup) +{ + assert(running); + + if (alg_lookup && alg_lookup->id >= 0) { + if (running->alg_id != alg_lookup->id) { + return true; + } + } + + if (secr) { + assert(secr->size > 0); + if (running->secr->size != secr->size || + 0 != memcmp(running->secr->data, secr->data, + running->secr->size)) { + return true; + } + } + + return false; +} + +/** + * @brief Returns newly allocated secret via pointer argument. + */ +static bool obtain_secret(JsonNode *root_node, struct kr_cookie_secret **secret, + const char *name) +{ + assert(secret && name); + + const JsonNode *node; + if ((node = json_find_member(root_node, name)) != NULL) { + *secret = create_secret(node); + if (!*secret) { + return false; + } + } + + return true; +} + +/** + * @brief Updates the current configuration and moves current to recent. + */ +static void update_running(struct kr_cookie_settings *running, + struct kr_cookie_secret **secret, + const knot_lookup_t *alg_lookup) +{ + assert(running && secret); + assert(*secret || alg_lookup); + + running->recent.alg_id = -1; + free(running->recent.secr); + running->recent.secr = NULL; + + running->recent.alg_id = running->current.alg_id; + if (alg_lookup) { + assert(alg_lookup->id >= 0); + running->current.alg_id = alg_lookup->id; + } + + if (*secret) { + running->recent.secr = running->current.secr; + running->current.secr = *secret; + *secret = NULL; + } else { + running->recent.secr = clone_cookie_secret(running->current.secr); + } +} + +/** + * @brief Applies modification onto client/server running configuration. + * @note The @a secret is going to be consumed. + * @param secret pointer to new secret + * @param alg_lookup new algorithm + * @param enabled JSON node holding boolean value + */ +static void apply_changes(struct kr_cookie_settings *running, + struct kr_cookie_secret **secret, + const knot_lookup_t *alg_lookup, + const JsonNode *enabled) +{ + assert(running && secret); + + if (is_modified(&running->current, *secret, alg_lookup)) { + update_running(running, secret, alg_lookup); + } + + if (enabled) { + assert(enabled->tag == JSON_BOOL); + running->enabled = enabled->bool_; + } +} + +/** + * @brief Applies configuration. + * + * @note The function must be called after the input values have been checked + * for validity. Only first found values are applied. + * + * @param ctx cookie configuration context + * @param root_node JSON root node + * @return true if changes were applied + */ +static bool config_apply_json(struct kr_cookie_ctx *ctx, JsonNode *root_node) +{ + assert(ctx && root_node); + + /* + * These must be allocated before actual change. Allocation failure + * should not leave configuration in inconsistent state. + */ + struct kr_cookie_secret *new_clnt_secret = NULL; + struct kr_cookie_secret *new_srvr_secret = NULL; + if (!obtain_secret(root_node, &new_clnt_secret, NAME_CLIENT_SECRET)) { + return false; + } + if (!obtain_secret(root_node, &new_srvr_secret, NAME_SERVER_SECRET)) { + free(new_clnt_secret); + return false; + } + + /* Algorithm pointers. */ + const knot_lookup_t *clnt_lookup = hash_func_lookup(json_find_member(root_node, NAME_CLIENT_COOKIE_ALG), kr_cc_alg_names); + const knot_lookup_t *srvr_lookup = hash_func_lookup(json_find_member(root_node, NAME_SERVER_COOKIE_ALG), kr_sc_alg_names); + + const JsonNode *clnt_enabled_node = json_find_member(root_node, NAME_CLIENT_ENABLED); + const JsonNode *srvr_enabled_node = json_find_member(root_node, NAME_SERVER_ENABLED); + + apply_changes(&ctx->clnt, &new_clnt_secret, clnt_lookup, clnt_enabled_node); + apply_changes(&ctx->srvr, &new_srvr_secret, srvr_lookup, srvr_enabled_node); + + /* + * Allocated secrets should be already consumed. There is no need to + * free them. + */ + + return true; +} + +bool config_apply(struct kr_cookie_ctx *ctx, const char *args) +{ + if (!ctx) { + return false; + } + + if (!args || !strlen(args)) { + return true; + } + + if (!args || !strlen(args)) { + return true; + } + + bool success = false; + + /* Check whether all supplied data are valid. */ + JsonNode *root_node = json_decode(args); + if (!root_node) { + return false; + } + JsonNode *node; + json_foreach (node, root_node) { + success = configuration_node_ok(node); + if (!success) { + break; + } + } + + /* Apply configuration if values seem to be OK. */ + if (success) { + success = config_apply_json(ctx, root_node); + } + + json_delete(root_node); + + return success; +} + +char *config_read(struct kr_cookie_ctx *ctx) +{ + if (!ctx) { + return NULL; + } + + const knot_lookup_t *lookup; + char *result; + JsonNode *root_node = json_mkobject(); + if (!root_node) { + return NULL; + } + + json_append_member(root_node, NAME_CLIENT_ENABLED, + json_mkbool(ctx->clnt.enabled)); + + read_secret(root_node, NAME_CLIENT_SECRET, ctx->clnt.current.secr); + + lookup = knot_lookup_by_id(kr_cc_alg_names, ctx->clnt.current.alg_id); + if (lookup) { + json_append_member(root_node, NAME_CLIENT_COOKIE_ALG, + json_mkstring(lookup->name)); + } + + read_available_hashes(root_node, NAME_AVAILABLE_CLIENT_COOKIE_ALGS, + kr_cc_alg_names); + + json_append_member(root_node, NAME_SERVER_ENABLED, + json_mkbool(ctx->srvr.enabled)); + + read_secret(root_node, NAME_SERVER_SECRET, ctx->srvr.current.secr); + + lookup = knot_lookup_by_id(kr_sc_alg_names, ctx->srvr.current.alg_id); + if (lookup) { + json_append_member(root_node, NAME_SERVER_COOKIE_ALG, + json_mkstring(lookup->name)); + } + + read_available_hashes(root_node, NAME_AVAILABLE_SERVER_COOKIE_ALGS, + kr_sc_alg_names); + + result = json_encode(root_node); + json_delete(root_node); + return result; +} + +int config_init(struct kr_cookie_ctx *ctx) +{ + if (!ctx) { + return kr_error(EINVAL); + } + + kr_cookie_ctx_init(ctx); + + struct kr_cookie_secret *cs = new_cookie_secret(KNOT_OPT_COOKIE_CLNT, + true); + struct kr_cookie_secret *ss = new_cookie_secret(KNOT_OPT_COOKIE_CLNT, + true); + if (!cs || !ss) { + free(cs); + free(ss); + return kr_error(ENOMEM); + } + + const knot_lookup_t *clookup = knot_lookup_by_name(kr_cc_alg_names, + "FNV-64"); + const knot_lookup_t *slookup = knot_lookup_by_name(kr_sc_alg_names, + "FNV-64"); + if (!clookup || !slookup) { + free(cs); + free(ss); + return kr_error(ENOENT); + } + + ctx->clnt.current.secr = cs; + ctx->clnt.current.alg_id = clookup->id; + + ctx->srvr.current.secr = ss; + ctx->srvr.current.alg_id = slookup->id; + + return kr_ok(); +} + +void config_deinit(struct kr_cookie_ctx *ctx) +{ + if (!ctx) { + return; + } + + ctx->clnt.enabled = false; + + free(ctx->clnt.recent.secr); + ctx->clnt.recent.secr = NULL; + + free(ctx->clnt.current.secr); + ctx->clnt.current.secr = NULL; + + ctx->srvr.enabled = false; + + free(ctx->srvr.recent.secr); + ctx->srvr.recent.secr = NULL; + + free(ctx->srvr.current.secr); + ctx->srvr.current.secr = NULL; +} diff --git a/modules/cookies/cookiectl.h b/modules/cookies/cookiectl.h new file mode 100644 index 0000000..48a379d --- /dev/null +++ b/modules/cookies/cookiectl.h @@ -0,0 +1,47 @@ +/* Copyright (C) 2016-2017 CZ.NIC, z.s.p.o. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + */ + +#pragma once + +#include "lib/cookies/control.h" + +/** + * @brief Sets cookie control context structure. + * @param ctx cookie control context + * @param args JSON string describing configuration changes + * @return true if changes successfully applied + */ +bool config_apply(struct kr_cookie_ctx *ctx, const char *args); + +/** + * @brief Reads cookie control context structure. + * @param ctx cookie control context + * @return JSON string or NULL on error + */ +char *config_read(struct kr_cookie_ctx *ctx); + +/** + * @brief Initialises cookie control context to default values. + * @param ctx cookie control context + * @return kr_ok() or error code + */ +int config_init(struct kr_cookie_ctx *ctx); + +/** + * @brief Clears the cookie control context. + * @param ctx cookie control context + */ +void config_deinit(struct kr_cookie_ctx *ctx); diff --git a/modules/cookies/cookiemonster.c b/modules/cookies/cookiemonster.c new file mode 100644 index 0000000..7af7afa --- /dev/null +++ b/modules/cookies/cookiemonster.c @@ -0,0 +1,469 @@ +/* Copyright (C) 2016-2017 CZ.NIC, z.s.p.o. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "lib/cookies/alg_containers.h" +#include "lib/cookies/control.h" +#include "lib/cookies/helper.h" +#include "lib/cookies/lru_cache.h" +#include "lib/cookies/nonce.h" +#include "lib/resolve.h" +#include "lib/rplan.h" +#include "modules/cookies/cookiemonster.h" + +#define VERBOSE_MSG(qry, ...) QRVERBOSE(qry, "cookies", __VA_ARGS__) + +/** + * Obtain address from query/response context if if can be obtained. + * @param req resolution context + * @return pointer to where the server socket address, NULL if not provided within context + */ +static const struct sockaddr *passed_server_sockaddr(const struct kr_request *req) +{ + if (!req || !req->upstream.addr) { + return NULL; + } + + if (req->upstream.addr->sa_family == AF_INET || + req->upstream.addr->sa_family == AF_INET6) { + return req->upstream.addr; + } + + return NULL; +} + +/** + * Obtain pointer to server socket address that matches obtained cookie. + * @param srvr_sa server socket address + * @param cc client cookie from the response + * @param cc_len client cookie size + * @param clnt_sett client cookie settings structure + * @retval 1 if cookie matches current settings + * @retval 0 if cookie matches recent settings + * @return -1 if cookie does not match + * @return -2 on any error + */ +static int srvr_sockaddr_cc_check(const struct sockaddr *srvr_sa, + const uint8_t *cc, uint16_t cc_len, + const struct kr_cookie_settings *clnt_sett) +{ + assert(cc && cc_len > 0 && clnt_sett); + + if (!srvr_sa) { + return -2; + } + + assert(clnt_sett->current.secr); + + /* The address must correspond with the client cookie. */ + struct knot_cc_input input = { + .clnt_sockaddr = NULL, /* Not supported yet. */ + .srvr_sockaddr = srvr_sa, + .secret_data = clnt_sett->current.secr->data, + .secret_len = clnt_sett->current.secr->size + }; + + const struct knot_cc_alg *cc_alg = kr_cc_alg_get(clnt_sett->current.alg_id); + if (!cc_alg) { + return -2; + } + int comp_ret = -1; /* Cookie does not match. */ + int ret = knot_cc_check(cc, cc_len, &input, cc_alg); + if (ret == KNOT_EOK) { + comp_ret = 1; + } else { + cc_alg = kr_cc_alg_get(clnt_sett->recent.alg_id); + if (clnt_sett->recent.secr && cc_alg) { + input.secret_data = clnt_sett->recent.secr->data; + input.secret_len = clnt_sett->recent.secr->size; + ret = knot_cc_check(cc, cc_len, &input, cc_alg); + if (ret == KNOT_EOK) { + comp_ret = 0; + } + } + } + + return comp_ret; +} + +/** + * Obtain cookie from cache. + * @note Cookies with invalid length are ignored. + * @param cache cache context + * @param sa key value + * @param cookie_opt entire EDNS cookie option (including header) + * @return true if a cookie exists in cache + */ +static const uint8_t *get_cookie_opt(kr_cookie_lru_t *cache, + const struct sockaddr *sa) +{ + assert(cache && sa); + + const uint8_t *cached_cookie_opt = kr_cookie_lru_get(cache, sa); + if (!cached_cookie_opt) { + return NULL; + } + + size_t cookie_opt_size = KNOT_EDNS_OPTION_HDRLEN + + knot_edns_opt_get_length(cached_cookie_opt); + if (cookie_opt_size > KR_COOKIE_OPT_MAX_LEN) { + return NULL; + } + + return cached_cookie_opt; +} + +/** + * Check whether the supplied cookie is cached under the given key. + * @param cache cache context + * @param sa key value + * @param cookie_opt cookie option to search for + */ +static bool is_cookie_cached(kr_cookie_lru_t *cache, const struct sockaddr *sa, + const uint8_t *cookie_opt) +{ + assert(cache && sa && cookie_opt); + + const uint8_t *cached_opt = get_cookie_opt(cache, sa); + if (!cached_opt) { + return false; + } + + uint16_t cookie_opt_size = KNOT_EDNS_OPTION_HDRLEN + + knot_edns_opt_get_length(cookie_opt); + uint16_t cached_opt_size = KNOT_EDNS_OPTION_HDRLEN + + knot_edns_opt_get_length(cached_opt); + + if (cookie_opt_size != cached_opt_size) { + return false; + } + + return memcmp(cookie_opt, cached_opt, cookie_opt_size) == 0; +} + +/** + * Check cookie content and store it to cache. + */ +static bool check_cookie_content_and_cache(const struct kr_cookie_settings *clnt_sett, + struct kr_request *req, + uint8_t *pkt_cookie_opt, + kr_cookie_lru_t *cache) +{ + assert(clnt_sett && req && pkt_cookie_opt && cache); + + const uint8_t *pkt_cookie_data = knot_edns_opt_get_data(pkt_cookie_opt); + uint16_t pkt_cookie_len = knot_edns_opt_get_length(pkt_cookie_opt); + /* knot_edns_opt_cookie_parse() returns error on invalid data. */ + + const uint8_t *pkt_cc = NULL, *pkt_sc = NULL; + uint16_t pkt_cc_len = 0, pkt_sc_len = 0; + + int ret = knot_edns_opt_cookie_parse(pkt_cookie_data, pkt_cookie_len, + &pkt_cc, &pkt_cc_len, + &pkt_sc, &pkt_sc_len); + if (ret != KNOT_EOK || !pkt_sc) { + VERBOSE_MSG(NULL, "%s\n", + "got malformed DNS cookie or server cookie missing"); + return false; + } + assert(pkt_cc_len == KNOT_OPT_COOKIE_CLNT); + + /* Check server address against received client cookie. */ + const struct sockaddr *srvr_sockaddr = passed_server_sockaddr(req); + ret = srvr_sockaddr_cc_check(srvr_sockaddr, pkt_cc, pkt_cc_len, + clnt_sett); + if (ret < 0) { + VERBOSE_MSG(NULL, "%s\n", "could not match received cookie"); + return false; + } + assert(srvr_sockaddr); + + /* Don't cache received cookies that don't match the current secret. */ + if ((ret == 1) && + !is_cookie_cached(cache, srvr_sockaddr, pkt_cookie_opt)) { + ret = kr_cookie_lru_set(cache, srvr_sockaddr, pkt_cookie_opt); + if (ret != kr_ok()) { + VERBOSE_MSG(NULL, "%s\n", "failed caching cookie"); + } else { + VERBOSE_MSG(NULL, "%s\n", "cookie cached"); + } + } + + return true; +} + +/** Process incoming response. */ +int check_response(kr_layer_t *ctx, knot_pkt_t *pkt) +{ + struct kr_request *req = ctx->req; + struct kr_query *qry = req->current_query; + struct kr_cookie_ctx *cookie_ctx = &req->ctx->cookie_ctx; + + if (ctx->state & (KR_STATE_DONE | KR_STATE_FAIL)) { + return ctx->state; + } + + if (!cookie_ctx->clnt.enabled || (qry->flags.TCP)) { + return ctx->state; + } + + /* Obtain cookie if present in response. Don't check actual content. */ + uint8_t *pkt_cookie_opt = NULL; + if (knot_pkt_has_edns(pkt)) { + pkt_cookie_opt = knot_edns_get_option(pkt->opt_rr, + KNOT_EDNS_OPTION_COOKIE); + } + + kr_cookie_lru_t *cookie_cache = req->ctx->cache_cookie; + + const struct sockaddr *srvr_sockaddr = passed_server_sockaddr(req); + + if (!pkt_cookie_opt && srvr_sockaddr && + get_cookie_opt(cookie_cache, srvr_sockaddr)) { + /* We haven't received any cookies although we should. */ + VERBOSE_MSG(NULL, "%s\n", + "expected to receive a cookie but none received"); + return KR_STATE_FAIL; + } + + if (!pkt_cookie_opt) { + /* Don't do anything if no cookies expected and received. */ + return ctx->state; + } + + if (!check_cookie_content_and_cache(&cookie_ctx->clnt, req, + pkt_cookie_opt, cookie_cache)) { + return KR_STATE_FAIL; + } + + uint16_t rcode = knot_pkt_ext_rcode(pkt); + if (rcode == KNOT_RCODE_BADCOOKIE) { + struct kr_query *next = NULL; + if (!(qry->flags.BADCOOKIE_AGAIN)) { + /* Received first BADCOOKIE, regenerate query. */ + next = kr_rplan_push(&req->rplan, qry->parent, + qry->sname, qry->sclass, + qry->stype); + } + + if (next) { + VERBOSE_MSG(NULL, "%s\n", "BADCOOKIE querying again"); + qry->flags.BADCOOKIE_AGAIN = true; + } else { + /* + * Either the planning of the second request failed or + * BADCOOKIE received for the second time. + * + * RFC7873 5.3 says that TCP should be used. Currently + * we always expect that the server doesn't support TCP. + */ + qry->flags.BADCOOKIE_AGAIN = false; + return KR_STATE_FAIL; + } + + return KR_STATE_CONSUME; + } + + return ctx->state; +} + +static inline uint8_t *req_cookie_option(struct kr_request *req) +{ + if (!req || !req->qsource.opt) { + return NULL; + } + + return knot_edns_get_option(req->qsource.opt, KNOT_EDNS_OPTION_COOKIE); +} + +/** + * @brief Returns resolver state and sets answer RCODE on missing or invalid + * server cookie. + * + * @note Caller should exit when only KR_STATE_FAIL is returned. + * + * @param state original resolver state + * @param sc_present true if server cookie is present + * @param ignore_badcookie true if bad cookies should be treated as good ones + * @param req request context + * @return new resolver state + */ +static int invalid_sc_status(int state, bool sc_present, bool ignore_badcookie, + const struct kr_request *req, knot_pkt_t *answer) +{ + assert(req && answer); + + const knot_pkt_t *pkt = req->qsource.packet; + + if (!pkt) { + return KR_STATE_FAIL; + } + + if (knot_wire_get_qdcount(pkt->wire) == 0) { + /* RFC7873 5.4 */ + state = KR_STATE_DONE; + if (sc_present) { + kr_pkt_set_ext_rcode(answer, KNOT_RCODE_BADCOOKIE); + state |= KR_STATE_FAIL; + } + } else if (!ignore_badcookie) { + /* Generate BADCOOKIE response. */ + VERBOSE_MSG(NULL, "%s\n", + !sc_present ? "request is missing server cookie" : + "request has invalid server cookie"); + if (!knot_pkt_has_edns(answer)) { + VERBOSE_MSG(NULL, "%s\n", + "missing EDNS section in prepared answer"); + /* Caller should exit on this (and only this) state. */ + return KR_STATE_FAIL; + } + kr_pkt_set_ext_rcode(answer, KNOT_RCODE_BADCOOKIE); + state = KR_STATE_FAIL | KR_STATE_DONE; + } + + return state; +} + +int check_request(kr_layer_t *ctx) +{ + struct kr_request *req = ctx->req; + struct kr_cookie_settings *srvr_sett = &req->ctx->cookie_ctx.srvr; + + if (!srvr_sett->enabled) { + return ctx->state; + } + + knot_pkt_t *answer = req->answer; + + if (ctx->state & (KR_STATE_DONE | KR_STATE_FAIL)) { + return ctx->state; + } + + if (!srvr_sett->enabled) { + if (knot_pkt_has_edns(answer)) { + /* Delete any cookies. */ + knot_edns_remove_options(answer->opt_rr, + KNOT_EDNS_OPTION_COOKIE); + } + return ctx->state; + } + + uint8_t *req_cookie_opt = req_cookie_option(req); + if (!req_cookie_opt) { + return ctx->state; /* Don't do anything without cookies. */ + } + + struct knot_dns_cookies cookies; + memset(&cookies, 0, sizeof(cookies)); + int ret = kr_parse_cookie_opt(req_cookie_opt, &cookies); + if (ret != kr_ok()) { + /* FORMERR -- malformed cookies. */ + VERBOSE_MSG(NULL, "%s\n", "request with malformed cookie"); + knot_wire_set_rcode(answer->wire, KNOT_RCODE_FORMERR); + return KR_STATE_FAIL | KR_STATE_DONE; + } + + /* + * RFC7873 5.2.3 and 5.2.4 suggest that queries with invalid or + * missing server cookies can be treated like normal. + * Right now bad cookies are always ignored (i.e. treated as valid). + */ + bool ignore_badcookie = true; + + const struct knot_sc_alg *current_sc_alg = kr_sc_alg_get(srvr_sett->current.alg_id); + + if (!req->qsource.addr || !srvr_sett->current.secr || !current_sc_alg) { + VERBOSE_MSG(NULL, "%s\n", "missing valid server cookie context"); + return KR_STATE_FAIL; + } + + int return_state = ctx->state; + + struct knot_sc_private srvr_data = { + .clnt_sockaddr = req->qsource.addr, + .secret_data = srvr_sett->current.secr->data, + .secret_len = srvr_sett->current.secr->size + }; + + struct knot_sc_input sc_input = { + .cc = cookies.cc, + .cc_len = cookies.cc_len, + /* Don't set nonce here. */ + .srvr_data = &srvr_data + }; + + struct kr_nonce_input nonce = { + .rand = kr_rand_bytes(sizeof(nonce.rand)), + .time = req->current_query->timestamp.tv_sec + }; + + if (!cookies.sc) { + /* Request has no server cookie. */ + return_state = invalid_sc_status(return_state, false, + ignore_badcookie, req, answer); + if (return_state == KR_STATE_FAIL) { + return return_state; + } + goto answer_add_cookies; + } + + /* Check server cookie obtained in request. */ + + ret = knot_sc_check(KR_NONCE_LEN, &cookies, &srvr_data, current_sc_alg); + if (ret == KNOT_EINVAL && srvr_sett->recent.secr) { + const struct knot_sc_alg *recent_sc_alg = kr_sc_alg_get(srvr_sett->recent.alg_id); + if (recent_sc_alg) { + /* Try recent algorithm. */ + struct knot_sc_private recent_srvr_data = { + .clnt_sockaddr = req->qsource.addr, + .secret_data = srvr_sett->recent.secr->data, + .secret_len = srvr_sett->recent.secr->size + }; + ret = knot_sc_check(KR_NONCE_LEN, &cookies, + &recent_srvr_data, recent_sc_alg); + } + } + if (ret != KNOT_EOK) { + /* Invalid server cookie. */ + return_state = invalid_sc_status(return_state, true, + ignore_badcookie, req, answer); + if (return_state == KR_STATE_FAIL) { + return return_state; + } + goto answer_add_cookies; + } + + /* Server cookie is OK. */ + +answer_add_cookies: + /* Add server cookie into response. */ + ret = kr_answer_write_cookie(&sc_input, &nonce, current_sc_alg, answer); + if (ret != kr_ok()) { + return_state = KR_STATE_FAIL; + } + return return_state; +} + +#undef VERBOSE_MSG diff --git a/modules/cookies/cookiemonster.h b/modules/cookies/cookiemonster.h new file mode 100644 index 0000000..ef269e7 --- /dev/null +++ b/modules/cookies/cookiemonster.h @@ -0,0 +1,27 @@ +/* Copyright (C) 2016-2017 CZ.NIC, z.s.p.o. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + */ + +#pragma once + +#include + +#include "lib/layer.h" + +/** Checks cookies of inbound requests. It's for kr_layer_api_t::begin. */ +int check_request(kr_layer_t *ctx); + +/** Checks cookies of received responses. It's for kr_layer_api_t::consume. */ +int check_response(kr_layer_t *ctx, knot_pkt_t *pkt); diff --git a/modules/cookies/cookies.c b/modules/cookies/cookies.c new file mode 100644 index 0000000..6a1db4f --- /dev/null +++ b/modules/cookies/cookies.c @@ -0,0 +1,100 @@ +/* Copyright (C) 2016-2017 CZ.NIC, z.s.p.o. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + */ + +#include + +#include "daemon/engine.h" +#include "lib/layer.h" +#include "modules/cookies/cookiectl.h" +#include "modules/cookies/cookiemonster.h" + +/** + * Get/set DNS cookie related stuff. + * + * Input: { name: value, ... } + * Output: current configuration + */ +static char *cookies_config(void *env, struct kr_module *module, + const char *args) +{ + struct kr_cookie_ctx *cookie_ctx = module->data; + assert(cookie_ctx); + + /* Apply configuration, if any. */ + config_apply(cookie_ctx, args); + + /* Return current configuration. */ + return config_read(cookie_ctx); +} + +/* + * Module implementation. + */ + +KR_EXPORT +int cookies_init(struct kr_module *module) +{ + struct engine *engine = module->data; + + struct kr_cookie_ctx *cookie_ctx = &engine->resolver.cookie_ctx; + + int ret = config_init(cookie_ctx); + if (ret != kr_ok()) { + return ret; + } + + /* Replace engine pointer. */ + module->data = cookie_ctx; + + return kr_ok(); +} + +KR_EXPORT +int cookies_deinit(struct kr_module *module) +{ + struct kr_cookie_ctx *cookie_ctx = module->data; + + config_deinit(cookie_ctx); + + return kr_ok(); +} + +KR_EXPORT +const kr_layer_api_t *cookies_layer(struct kr_module *module) +{ + /* The function answer_finalize() in resolver is called before any + * .finish callback. Therefore this layer does not use it. */ + + static kr_layer_api_t _layer = { + .begin = &check_request, + .consume = &check_response + }; + /* Store module reference */ + _layer.data = module; + return &_layer; +} + +KR_EXPORT +struct kr_prop *cookies_props(void) +{ + static struct kr_prop prop_list[] = { + { &cookies_config, "config", "Empty value to return current configuration.", }, + { NULL, NULL, NULL } + }; + return prop_list; +} + +KR_MODULE_EXPORT(cookies) diff --git a/modules/cookies/cookies.mk b/modules/cookies/cookies.mk new file mode 100644 index 0000000..31d2120 --- /dev/null +++ b/modules/cookies/cookies.mk @@ -0,0 +1,8 @@ +cookies_CFLAGS := -fPIC +cookies_SOURCES := \ + modules/cookies/cookiectl.c \ + modules/cookies/cookiemonster.c \ + modules/cookies/cookies.c +cookies_DEPEND := $(libkres) +cookies_LIBS := $(contrib_TARGET) $(libkres_TARGET) $(libkres_LIBS) +$(call make_c_module,cookies) diff --git a/modules/daf/README.rst b/modules/daf/README.rst new file mode 100644 index 0000000..24ca504 --- /dev/null +++ b/modules/daf/README.rst @@ -0,0 +1,137 @@ +.. _mod-daf: + +DNS Application Firewall +------------------------ + +This module is a high-level interface for other powerful filtering modules and DNS views. It provides an easy interface to apply and monitor DNS filtering rules and a persistent memory for them. It also provides a restful service interface and an HTTP interface. + +Example configuration +^^^^^^^^^^^^^^^^^^^^^ + +Firewall rules are declarative and consist of filters and actions. Filters have ``field operator operand`` notation (e.g. ``qname = example.com``), and may be chained using AND/OR keywords. Actions may or may not have parameters after the action name. + +.. code-block:: lua + + -- Let's write some daft rules! + modules = { 'daf' } + + -- Block all queries with QNAME = example.com + daf.add 'qname = example.com deny' + + -- Filters can be combined using AND/OR... + -- Block all queries with QNAME match regex and coming from given subnet + daf.add 'qname ~ %w+.example.com AND src = 192.0.2.0/24 deny' + + -- We also can reroute addresses in response to alternate target + -- This reroutes 1.2.3.4 to localhost + daf.add 'src = 127.0.0.0/8 reroute 192.0.2.1-127.0.0.1' + + -- Subnets work too, this reroutes a whole subnet + -- e.g. 192.0.2.55 to 127.0.0.55 + daf.add 'src = 127.0.0.0/8 reroute 192.0.2.0/24-127.0.0.0' + + -- This rewrites all A answers for 'example.com' from + -- whatever the original address was to 127.0.0.2 + daf.add 'src = 127.0.0.0/8 rewrite example.com A 127.0.0.2' + + -- Mirror queries matching given name to DNS logger + daf.add 'qname ~ %w+.example.com mirror 127.0.0.2' + daf.add 'qname ~ example-%d.com mirror 127.0.0.3@5353' + + -- Forward queries from subnet + daf.add 'src = 127.0.0.1/8 forward 127.0.0.1@5353' + -- Forward to multiple targets + daf.add 'src = 127.0.0.1/8 forward 127.0.0.1@5353,127.0.0.2@5353' + + -- Truncate queries based on destination IPs + daf.add 'dst = 192.0.2.51 truncate' + + -- Disable a rule + daf.disable 2 + -- Enable a rule + daf.enable 2 + -- Delete a rule + daf.del 2 + +If you're not sure what firewall rules are in effect, see ``daf.rules``: + +.. code-block:: text + + -- Show active rules + > daf.rules + [1] => { + [rule] => { + [count] => 42 + [id] => 1 + [cb] => function: 0x1a3eda38 + } + [info] => qname = example.com AND src = 127.0.0.1/8 deny + [policy] => function: 0x1a3eda38 + } + [2] => { + [rule] => { + [suspended] => true + [count] => 123522 + [id] => 2 + [cb] => function: 0x1a3ede88 + } + [info] => qname ~ %w+.facebook.com AND src = 127.0.0.1/8 deny... + [policy] => function: 0x1a3ede88 + } + +Web interface +^^^^^^^^^^^^^ + +If you have :ref:`HTTP/2 ` loaded, the firewall automatically loads as a snippet. +You can create, track, suspend and remove firewall rules from the web interface. +If you load both modules, you have to load `daf` after `http`. + +RESTful interface +^^^^^^^^^^^^^^^^^ + +The module also exports a RESTful API for operations over rule chains. + + +.. csv-table:: + :header: "URL", "HTTP Verb", "Action" + + "/daf", "GET", "Return JSON list of active rules." + "/daf", "POST", "Insert new rule, rule string is expected in body. Returns rule information in JSON." + "/daf/", "GET", "Retrieve a rule matching given ID." + "/daf/", "DELETE", "Delete a rule matching given ID." + "/daf///", "PATCH", "Modify given rule, for example /daf/3/active/false suspends rule 3." + +This interface is used by the web interface for all operations, but you can also use it directly +for testing. + +.. code-block:: bash + + # Get current rule set + $ curl -s -X GET http://localhost:8053/daf | jq . + {} + + # Create new rule + $ curl -s -X POST -d "src = 127.0.0.1 pass" http://localhost:8053/daf | jq . + { + "count": 0, + "active": true, + "info": "src = 127.0.0.1 pass", + "id": 1 + } + + # Disable rule + $ curl -s -X PATCH http://localhost:8053/daf/1/active/false | jq . + true + + # Retrieve a rule information + $ curl -s -X GET http://localhost:8053/daf/1 | jq . + { + "count": 4, + "active": true, + "info": "src = 127.0.0.1 pass", + "id": 1 + } + + # Delete a rule + $ curl -s -X DELETE http://localhost:8053/daf/1 | jq . + true diff --git a/modules/daf/daf.js b/modules/daf/daf.js new file mode 100644 index 0000000..a614118 --- /dev/null +++ b/modules/daf/daf.js @@ -0,0 +1,294 @@ +/* Filter grammar */ +const dafg = { + key: {'qname': true, 'src': true, 'dst': true}, + op: {'=': true, '~': true}, + conj: {'and': true, 'or': true}, + action: {'pass': true, 'deny': true, 'drop': true, 'truncate': true, 'forward': true, 'reroute': true, 'rewrite': true, 'mirror': true}, + suggest: [ + 'QNAME = example.com', + 'QNAME ~ %d+.example.com', + 'SRC = 127.0.0.1', + 'SRC = 127.0.0.1/8', + 'DST = 127.0.0.1', + 'DST = 127.0.0.1/8', + /* Action examples */ + 'PASS', 'DENY', 'DROP', 'TRUNCATE', + 'FORWARD 127.0.0.1', + 'MIRROR 127.0.0.1', + 'REROUTE 127.0.0.1-192.168.1.1', + 'REROUTE 127.0.0.1/24-192.168.1.0', + 'REWRITE example.com A 127.0.0.1', + 'REWRITE example.com AAAA ::1', + ] +}; + +function setValidateHint(cls) { + var builderForm = $('#daf-builder-form'); + builderForm.removeClass('has-error has-warning has-success'); + if (cls) { + builderForm.addClass(cls); + } +} + +function validateToken(tok, tbl) { + if (tok.length > 0 && tok[0].length > 0) { + if (tbl[tok[0].toLowerCase()]) { + setValidateHint('has-success'); + return true; + } else { setValidateHint('has-error'); } + } else { setValidateHint('has-warning'); } + return false; +} + +function parseOption(tok) { + var key = tok.shift().toLowerCase(); + var op = null; + if (dafg.key[key]) { + op = tok.shift(); + if (op) { + op = op.toLowerCase(); + } + } + const item = { + text: key.toUpperCase() + ' ' + (op ? op.toUpperCase() : '') + ' ' + tok.join(' '), + }; + if (dafg.key[key]) { + item.class = 'tag-default'; + } else if (dafg.action[key]) { + item.class = 'tag-warning'; + } else if (dafg.conj[key]) { + item.class = 'tag-success'; + } + return item; +} + +function createOption(input) { + const item = parseOption(input.split(' ')); + item.value = input; + return item; +} + +function dafComplete(form) { + const items = form.items; + for (var i in items) { + const tok = items[i].split(' ')[0].toLowerCase(); + if (dafg.action[tok]) { + return true; + } + } + return false; +} + +function formatRule(input) { + const tok = input.split(' '); + var res = []; + while (tok.length > 0) { + const key = tok.shift().toLowerCase(); + if (dafg.key[key]) { + var item = parseOption([key, tok.shift(), tok.shift()]); + res.push(''+item.text+''); + } else if (dafg.action[key]) { + var item = parseOption([key].concat(tok)); + res.push(''+item.text+''); + tok.splice(0, tok.length); + } else if (dafg.conj[key]) { + var item = parseOption([key]); + res.push(''+item.text+''); + } + } + return res.join(''); +} + +function toggleRule(row, span, enabled) { + if (!enabled) { + span.removeClass('glyphicon-pause'); + span.addClass('glyphicon-play'); + row.addClass('warning'); + } else { + span.removeClass('glyphicon-play'); + span.addClass('glyphicon-pause'); + row.removeClass('warning'); + } +} + +function ruleControl(cell, type, url, action) { + const row = cell.parent(); + $.ajax({ + url: 'daf/' + row.data('rule-id') + url, + type: type, + success: action, + fail: function (data) { + row.show(); + const reason = data.responseText.length > 0 ? data.responseText : 'internal error'; + cell.find('.alert').remove(); + cell.append( + '' + ); + }, + }); +} + +function bindRuleControl(cell) { + const row = cell.parent(); + cell.find('.daf-remove').click(function() { + row.hide(); + ruleControl(cell, 'DELETE', '', function (data) { + cell.parent().remove(); + }); + }); + cell.find('.daf-suspend').click(function() { + const span = $(this).find('span'); + ruleControl(cell, 'PATCH', span.hasClass('glyphicon-pause') ? '/active/false' : '/active/true'); + toggleRule(row, span, span.hasClass('glyphicon-play')); + }); +} + +function loadRule(rule, tbl) { + const row = $(''); + row.append('' + formatRule(rule.info) + ''); + row.append('' + rule.count + ''); + row.append(''); + row.append('' + + '
' + + '' + + '' + + '
'); + tbl.append(row); + /* Bind rule controls */ + bindRuleControl(row.find('.daf-ctl')); + toggleRule(row, row.find('.daf-suspend span'), rule.active); +} + +/* Load the filter table from JSON */ +function loadTable(resp) { + const tbl = $('#daf-rules') + tbl.children().remove(); + tbl.append('RuleMatchesRate') + for (var i in resp) { + loadRule(resp[i], tbl); + } +} + +$(function() { + /* Load the filter table. */ + $.ajax({ + url: 'daf', + type: 'get', + dataType: 'json', + success: loadTable + }); + /* Listen for counter updates */ + const wsStats = (secure ? 'wss://' : 'ws://') + location.host + '/daf'; + const ws = new Socket(wsStats); + var lastRateUpdate = Date.now(); + ws.onmessage = function(evt) { + var data = JSON.parse(evt.data); + /* Update heartbeat clock */ + var now = Date.now(); + var dt = now - lastRateUpdate; + lastRateUpdate = now; + /* Update match counts and rates */ + $('#daf-rules .daf-rate span').text(''); + for (var key in data) { + const row = $('tr[data-rule-id="'+key+'"]'); + if (row) { + const cell = row.find('.daf-count'); + const diff = data[key] - parseInt(cell.text()); + cell.text(data[key]); + const badge = row.find('.daf-rate span'); + if (diff > 0) { + /* Normalize difference to heartbeat (in msecs) */ + const rate = Math.ceil((1000 * diff) / dt); + badge.text(rate + ' pps'); + } + } + } + }; + /* Rule builder UI */ + $('#daf-builder').selectize({ + delimiter: ',', + persist: true, + highlight: true, + closeAfterSelect: true, + onItemAdd: function (input, item) { + setValidateHint(); + /* Prevent new rules when action is specified */ + const tok = input.split(' '); + if (dafg.action[tok[0].toLowerCase()]) { + $('#daf-add').focus(); + } else if(dafComplete(this)) { + /* No more rules after query is complete. */ + item.remove(); + } + }, + createFilter: function (input) { + const tok = input.split(' '); + var key, op, expr; + /* If there are already filters, allow conjunctions. */ + if (tok.length > 0 && this.items.length > 0 && dafg.conj[tok[0]]) { + setValidateHint(); + return true; + } + /* First token is expected to be filter key, + * or any postrule with a parameter */ + if (validateToken(tok, dafg.key)) { + key = tok.shift(); + } else if (tok.length > 1 && validateToken(tok, dafg.action)) { + setValidateHint(); + return true; + } else { + return false; + } + /* Input is a filter - second token must be operator */ + if (validateToken(tok, dafg.op)) { + op = tok.shift(); + } else { + return false; + } + /* Input is a filter - the rest of the tokens are RHS arguments. */ + if (tok.length > 0 && tok[0].length > 0) { + expr = tok.join(' '); + } else { + setValidateHint('has-warning'); + return false; + } + setValidateHint('has-success'); + return true; + }, + create: createOption, + render: { + item: function(item, escape) { + return '
' + escape(item.text) + ''; + }, + }, + }); + /* Add default suggestions. */ + const dafBuilder = $('#daf-builder')[0].selectize; + for (var i in dafg.suggest) { + dafBuilder.addOption(createOption(dafg.suggest[i])); + } + /* Rule builder submit */ + $('#daf-add').click(function () { + const form = $('#daf-builder-form').parent(); + if (dafBuilder.items.length == 0 || form.hasClass('has-error')) { + return; + } + /* Clear previous errors and resubmit. */ + form.parent().find('.alert').remove(); + $.post('daf', dafBuilder.items.join(' ')) + .done(function (data) { + dafBuilder.clear(); + loadRule(data, $('#daf-rules')); + }) + .fail(function (data) { + const reason = data.responseText.length > 0 ? data.responseText : 'internal error'; + form.after( + '' + ); + }); + }); +}); \ No newline at end of file diff --git a/modules/daf/daf.lua b/modules/daf/daf.lua new file mode 100644 index 0000000..28b6342 --- /dev/null +++ b/modules/daf/daf.lua @@ -0,0 +1,353 @@ +-- Load dependent modules +if not view then modules.load('view') end +if not policy then modules.load('policy') end + +-- Actions +local actions = { + pass = 1, deny = 2, drop = 3, tc = 4, truncate = 4, + forward = function (g) + local addrs = {} + local tok = g() + for addr in string.gmatch(tok, '[^,]+') do + table.insert(addrs, addr) + end + return policy.FORWARD(addrs) + end, + mirror = function (g) + return policy.MIRROR(g()) + end, + reroute = function (g) + local rules = {} + local tok = g() + while tok do + local from, to = tok:match '([^-]+)-(%S+)' + rules[from] = to + tok = g() + end + return policy.REROUTE(rules) + end, + rewrite = function (g) + local rules = {} + local tok = g() + while tok do + -- This is currently limited to A/AAAA rewriting + -- in fixed format ' ' + local _, to = g(), g() + rules[tok] = to + tok = g() + end + return policy.REROUTE(rules, true) + end, +} + +-- Filter rules per column +local filters = { + -- Filter on QNAME (either pattern or suffix match) + qname = function (g) + local op, val = g(), todname(g()) + if op == '~' then return policy.pattern(true, val:sub(2)) -- Skip leading label length + elseif op == '=' then return policy.suffix(true, {val}) + else error(string.format('invalid operator "%s" on qname', op)) end + end, + -- Filter on source address + src = function (g) + local op = g() + if op ~= '=' then error('address supports only "=" operator') end + return view.rule_src(true, g()) + end, + -- Filter on destination address + dst = function (g) + local op = g() + if op ~= '=' then error('address supports only "=" operator') end + return view.rule_dst(true, g()) + end, +} + +local function parse_filter(tok, g, prev) + if not tok then error(string.format('expected filter after "%s"', prev)) end + local filter = filters[tok:lower()] + if not filter then error(string.format('invalid filter "%s"', tok)) end + return filter(g) +end + +local function parse_rule(g) + -- Allow action without filter + local tok = g() + if not filters[tok:lower()] then + return tok, nil + end + local f = parse_filter(tok, g) + -- Compose filter functions on conjunctions + -- or terminate filter chain and return + tok = g() + while tok do + if tok:lower() == 'and' then + local fa, fb = f, parse_filter(g(), g, tok) + f = function (req, qry) return fa(req, qry) and fb(req, qry) end + elseif tok:lower() == 'or' then + local fa, fb = f, parse_filter(g(), g, tok) + f = function (req, qry) return fa(req, qry) or fb(req, qry) end + else + break + end + tok = g() + end + return tok, f +end + +local function parse_query(g) + local ok, actid, filter = pcall(parse_rule, g) + if not ok then return nil, actid end + actid = actid:lower() + if not actions[actid] then return nil, string.format('invalid action "%s"', actid) end + -- Parse and interpret action + local action = actions[actid] + if type(action) == 'function' then + action = action(g) + end + return actid, action, filter +end + +-- Compile a rule described by query language +-- The query language is modelled by iptables/nftables +-- conj = AND | OR +-- op = IS | NOT | LIKE | IN +-- filter = +-- rule = | +-- action = PASS | DENY | DROP | TC | FORWARD +-- query = +local function compile(query) + local g = string.gmatch(query, '%S+') + return parse_query(g) +end + +-- @function Describe given rule for presentation +local function rule_info(r) + return {info=r.info, id=r.rule.id, active=(r.rule.suspended ~= true), count=r.rule.count} +end + +-- Module declaration +local M = { + rules = {} +} + +-- @function Remove a rule + +-- @function Cleanup module +function M.deinit() + if http and http.endpoints then + http.endpoints['/daf'] = nil + http.endpoints['/daf.js'] = nil + http.snippets['/daf'] = nil + end +end + +-- @function Add rule +function M.add(rule) + -- Ignore duplicates + for _, r in ipairs(M.rules) do + if r.info == rule then return r end + end + local id, action, filter = compile(rule) + if not id then error(action) end + -- Combine filter and action into policy + local p + if filter then + p = function (req, qry) + return filter(req, qry) and action + end + else + p = function () + return action + end + end + local desc = {info=rule, policy=p} + -- Enforce in policy module, special actions are postrules + if id == 'reroute' or id == 'rewrite' then + desc.rule = policy.add(p, true) + else + desc.rule = policy.add(p) + end + table.insert(M.rules, desc) + return desc +end + +-- @function Remove a rule +function M.del(id) + for _, r in ipairs(M.rules) do + if r.rule.id == id then + policy.del(id) + table.remove(M.rules, id) + return true + end + end +end + +-- @function Find a rule +function M.get(id) + for _, r in ipairs(M.rules) do + if r.rule.id == id then + return r + end + end +end + +-- @function Enable/disable a rule +function M.toggle(id, val) + for _, r in ipairs(M.rules) do + if r.rule.id == id then + r.rule.suspended = not val + return true + end + end +end + +-- @function Enable/disable a rule +function M.disable(id) + return M.toggle(id, false) +end +function M.enable(id) + return M.toggle(id, true) +end + +local function consensus(op, ...) + local ret = true + local results = map(string.format(op, ...)) + for _, r in ipairs(results) do + ret = ret and r + end + return ret +end + +-- @function Public-facing API +local function api(h, stream) + local m = h:get(':method') + -- GET method + if m == 'GET' then + local path = h:get(':path') + local id = tonumber(path:match '/([^/]*)$') + if id then + local r = M.get(id) + if r then + return rule_info(r) + end + return 404, '"No such rule"' -- Not found + else + local ret = {} + for _, r in ipairs(M.rules) do + table.insert(ret, rule_info(r)) + end + return ret + end + -- DELETE method + elseif m == 'DELETE' then + local path = h:get(':path') + local id = tonumber(path:match '/([^/]*)$') + if id then + if consensus('daf.del "%s"', id) then + return tojson(true) + end + return 404, '"No such rule"' -- Not found + end + return 400 -- Request doesn't have numeric id + -- POST method + elseif m == 'POST' then + local query = stream:get_body_as_string() + if query then + local ok, r = pcall(M.add, query) + if not ok then return 500, string.format('"%s"', r:match('/([^/]+)$')) end + -- Dispatch to all other workers + consensus('daf.add "%s"', query) + return rule_info(r) + end + return 400 + -- PATCH method + elseif m == 'PATCH' then + local path = h:get(':path') + local id, action, val = path:match '(%d+)/([^/]*)/([^/]*)$' + id = tonumber(id) + if not id or not action or not val then + return 400 -- Request not well formatted + end + -- We do not support more actions + if action == 'active' then + if consensus('daf.toggle(%d, %s)', id, val == 'true' or 'false') then + return tojson(true) + else + return 404, '"No such rule"' + end + else + return 501, '"Action not implemented"' + end + end +end + +local function getmatches() + local update = {} + for _, rules in ipairs(map 'daf.rules') do + for _, r in ipairs(rules) do + local id = tostring(r.rule.id) + -- Must have string keys for JSON object and not an array + update[id] = (update[id] or 0) + r.rule.count + end + end + return update +end + +-- @function Publish DAF statistics +local function publish(_, ws) + local ok, last = true, nil + while ok do + -- Check if we have new rule matches + local diff = {} + local has_update, update = pcall(getmatches) + if has_update then + if last then + for id, count in pairs(update) do + if not last[id] or last[id] < count then + diff[id] = count + end + end + end + last = update + end + -- Update counters when there is a new data + if next(diff) ~= nil then + ok = ws:send(tojson(diff)) + else + ok = ws:send_ping() + end + worker.sleep(1) + end +end + +-- @function Configure module +function M.config() + if not http or not http.endpoints then return end + -- Export API and data publisher + http.endpoints['/daf.js'] = http.page('daf.js', 'daf') + http.endpoints['/daf'] = {'application/json', api, publish} + -- Export snippet + http.snippets['/daf'] = {'Application Firewall', [[ + +
+
+
+ +
+
+ +
+
+
+
+
+ + +
No rules here yet.
+
+
+ ]]} +end + +return M \ No newline at end of file diff --git a/modules/daf/daf.mk b/modules/daf/daf.mk new file mode 100644 index 0000000..0f02675 --- /dev/null +++ b/modules/daf/daf.mk @@ -0,0 +1,3 @@ +daf_SOURCES := daf.lua +daf_INSTALL := modules/daf/daf.js +$(call make_lua_module,daf) diff --git a/modules/detect_time_jump/README.rst b/modules/detect_time_jump/README.rst new file mode 100644 index 0000000..240907f --- /dev/null +++ b/modules/detect_time_jump/README.rst @@ -0,0 +1,20 @@ +.. _mod-detect_time_jump: + +Detect discontinuous jumps in the system time +--------------------------------------------- + +This module detect discontinuous jumps in the system time when resolver +is running. It clears cache when a significant backward time jumps occurs. + +Time jumps are usually created by NTP time change or by admin intervention. +These change can affect cache records as they store timestamp and TTL in real +time. + +If you want to preserve cache during time travel you should disable +this module by ``modules.unload('detect_time_jump')``. + +Due to the way monotonic system time works on typical systems, +suspend-resume cycles will be perceived as forward time jumps, +but this direction of shift does not have the risk of using records +beyond their intended TTL, so forward jumps do not cause erasing the cache. + diff --git a/modules/detect_time_jump/detect_time_jump.lua b/modules/detect_time_jump/detect_time_jump.lua new file mode 100644 index 0000000..65ae060 --- /dev/null +++ b/modules/detect_time_jump/detect_time_jump.lua @@ -0,0 +1,44 @@ +-- Module interface +local ffi = require('ffi') + +local mod = {} +mod.threshold = 10 * min +local event_id = nil + +-- Get time of last cache clear. Compute difference between realtime +-- and monotonic time. Compute difference of actual realtime and monotonic +-- time. In ideal case these differences should be almost same. +-- If they differ more than mod.threshold value then clear cache. +local function check_time() + local checkpoint = cache.checkpoint() + local cache_timeshift = checkpoint.walltime.sec * 1000 - checkpoint.monotime + local actual_timeshift = os.time() * 1000 - tonumber(ffi.C.kr_now()) + local jump_backward = cache_timeshift - actual_timeshift + if jump_backward > mod.threshold then + log("Detected backwards time jump, clearing cache.\n" .. + "But what does that mean? It means your future hasn't been written yet." + ) + cache.clear() + elseif -jump_backward > mod.threshold then + -- On Linux 4.17+ this shouldn't happen anymore: https://lwn.net/Articles/751482/ + log("Detected forward time jump. (Suspend-resume, possibly.)") + cache.checkpoint(true) + end +end + +function mod.init() + if event_id then + error("Module is already loaded.") + else + event_id = event.recurrent(1 * min , check_time) + end +end + +function mod.deinit() + if event_id then + event.cancel(event_id) + event_id = nil + end +end + +return mod diff --git a/modules/detect_time_jump/detect_time_jump.mk b/modules/detect_time_jump/detect_time_jump.mk new file mode 100644 index 0000000..04df607 --- /dev/null +++ b/modules/detect_time_jump/detect_time_jump.mk @@ -0,0 +1,2 @@ +detect_time_jump_SOURCES := detect_time_jump.lua +$(call make_lua_module,detect_time_jump) diff --git a/modules/detect_time_skew/README.rst b/modules/detect_time_skew/README.rst new file mode 100644 index 0000000..8eeb2eb --- /dev/null +++ b/modules/detect_time_skew/README.rst @@ -0,0 +1,21 @@ +.. _mod-detect_time_skew: + +System time skew detector +------------------------- + +This module compares local system time with inception and expiration time +bounds in DNSSEC signatures for ``. NS`` records. If the local system time is +outside of these bounds, it is likely a misconfiguration which will cause +all DNSSEC validation (and resolution) to fail. + +In case of mismatch, a warning message will be logged to help with +further diagnostics. + +.. warning:: Information printed by this module can be forged by a network attacker! + System administrator MUST verify values printed by this module and + fix local system time using a trusted source. + +This module is useful for debugging purposes. It runs only once during resolver +start does not anything after that. It is enabled by default. +You may disable the module by appending +``modules.unload('detect_time_skew')`` to your configuration. diff --git a/modules/detect_time_skew/detect_time_skew.lua b/modules/detect_time_skew/detect_time_skew.lua new file mode 100644 index 0000000..9f04c3e --- /dev/null +++ b/modules/detect_time_skew/detect_time_skew.lua @@ -0,0 +1,85 @@ +-- Module interface +local ffi = require('ffi') + +local mod = {} +local event_id = nil + +-- Resolve callback +-- Check time validity of RRSIGs in priming query +-- luacheck: no unused args +local function check_time_callback(pkt, req) + pkt = kres.pkt_t(pkt) + if pkt:rcode() ~= kres.rcode.NOERROR then + warn("[detect_time_skew] cannot resolve '.' NS") + return nil + end + local seen_rrsigs = 0 + local valid_rrsigs = 0 + local section = pkt:rrsets(kres.section.ANSWER) + local now = os.time() + local time_diff = 0 + local inception = 0 + local expiration = 0 + for i = 1, #section do + local rr = section[i] + assert(rr.type) + if rr.type == kres.type.RRSIG then + for k = 0, rr.rrs.count - 1 do + seen_rrsigs = seen_rrsigs + 1 + local rdata = rr:rdata_pt(k) + inception = ffi.C.kr_rrsig_sig_inception(rdata) + expiration = ffi.C.kr_rrsig_sig_expiration(rdata) + if now > expiration then + -- possitive value = in the future + time_diff = now - expiration + elseif now < inception then + -- negative value = in the past + time_diff = now - inception + else + valid_rrsigs = valid_rrsigs + 1 + end + end + end + end + if seen_rrsigs == 0 then + if verbose() then + log("[detect_time_skew] No RRSIGs received! ".. + "You really should configure DNSSEC trust anchor for the root.") + end + elseif valid_rrsigs == 0 then + warn("[detect_time_skew] Local system time %q seems to be at ".. + "least %u seconds in the %s. DNSSEC signatures for '.' NS ".. + "are not valid %s. Please check your system clock!", + os.date("%c", now), + math.abs(time_diff), + time_diff > 0 and "future" or "past", + time_diff > 0 and "yet" or "anymore") + elseif verbose() then + log("[detect_time_skew] Local system time %q is within ".. + "RRSIG validity interval <%q,%q>.", os.date("%c", now), + os.date("%c", inception), os.date("%c", expiration)) + end +end + +-- Make priming query and check time validty of RRSIGs. +local function check_time() + resolve(".", kres.type.NS, kres.class.IN, {"DNSSEC_WANT", "DNSSEC_CD"}, + check_time_callback) +end + +function mod.init() + if event_id then + error("Module is already loaded.") + else + event_id = event.after(0 , check_time) + end +end + +function mod.deinit() + if event_id then + event.cancel(event_id) + event_id = nil + end +end + +return mod diff --git a/modules/detect_time_skew/detect_time_skew.mk b/modules/detect_time_skew/detect_time_skew.mk new file mode 100644 index 0000000..bc29deb --- /dev/null +++ b/modules/detect_time_skew/detect_time_skew.mk @@ -0,0 +1,2 @@ +detect_time_skew_SOURCES := detect_time_skew.lua +$(call make_lua_module,detect_time_skew) diff --git a/modules/dns64/README.rst b/modules/dns64/README.rst new file mode 100644 index 0000000..047443f --- /dev/null +++ b/modules/dns64/README.rst @@ -0,0 +1,26 @@ +.. _mod-dns64: + +DNS64 +----- + +The module for :rfc:`6147` DNS64 AAAA-from-A record synthesis, it is used to enable client-server communication between an IPv6-only client and an IPv4-only server. See the well written `introduction`_ in the PowerDNS documentation. +If no address is passed (i.e. ``nil``), the well-known prefix ``64:ff9b::`` is used. + +.. warning:: The module currently won't work well with :ref:`policy.STUB `. + Also, the IPv6 passed in configuration is assumed to be ``/96``, and + PTR synthesis and "exclusion prefixes" aren't implemented. + +.. tip:: The A record sub-requests will be DNSSEC secured, but the synthetic AAAA records can't be. Make sure the last mile between stub and resolver is secure to avoid spoofing. + +Example configuration +^^^^^^^^^^^^^^^^^^^^^ + +.. code-block:: lua + + -- Load the module with a NAT64 address + modules = { dns64 = 'fe80::21b:77ff:0:0' } + -- Reconfigure later + dns64.config('fe80::21b:aabb:0:0') + + +.. _introduction: https://doc.powerdns.com/md/recursor/dns64 diff --git a/modules/dns64/dns64.lua b/modules/dns64/dns64.lua new file mode 100644 index 0000000..8e3eaa0 --- /dev/null +++ b/modules/dns64/dns64.lua @@ -0,0 +1,103 @@ +-- Module interface +local ffi = require('ffi') +local M = {} +local addr_buf = ffi.new('char[16]') + +--[[ +Missing parts of the RFC: + > The implementation SHOULD support mapping of separate IPv4 address + > ranges to separate IPv6 prefixes for AAAA record synthesis. This + > allows handling of special use IPv4 addresses [RFC5735]. + + Also the exclusion prefixes are not implemented, sec. 5.1.4 (MUST). + + TODO: support different prefix lengths, defaulting to /96 if not specified + https://tools.ietf.org/html/rfc6052#section-2.2 + + PTR queries aren't supported (MUST), sec. 5.3.1.2 +]] + +-- Config +function M.config (confstr) + M.proxy = kres.str2ip(confstr or '64:ff9b::') + if M.proxy == nil then error('[dns64] "'..confstr..'" is not a valid address') end +end + +-- Layers +M.layer = { } +function M.layer.consume(state, req, pkt) + if state == kres.FAIL then return state end + pkt = kres.pkt_t(pkt) + req = kres.request_t(req) + local qry = req:current() + -- Observe only final answers in IN class where request has no CD flag. + if M.proxy == nil or not qry.flags.RESOLVED + or pkt:qclass() ~= kres.class.IN or req.answer:cd() then + return state + end + -- Synthetic AAAA from marked A responses + local answer = pkt:section(kres.section.ANSWER) + + -- Observe final AAAA NODATA responses to the current SNAME. + local is_nodata = pkt:rcode() == kres.rcode.NOERROR and #answer == 0 + if pkt:qtype() == kres.type.AAAA and is_nodata and pkt:qname() == qry:name() + and qry.flags.RESOLVED and not qry.flags.CNAME and qry.parent == nil then + -- Start a *marked* corresponding A sub-query. + local extraFlags = kres.mk_qflags({}) + extraFlags.DNSSEC_WANT = qry.flags.DNSSEC_WANT + extraFlags.AWAIT_CUT = true + extraFlags.DNS64_MARK = true + req:push(pkt:qname(), kres.type.A, kres.class.IN, extraFlags, qry) + return state + end + + + -- Observe answer to the marked sub-query, and convert all A records in ANSWER + -- to corresponding AAAA records to be put into the request's answer. + if not qry.flags.DNS64_MARK then return state end + -- Find rank for the NODATA answer. + -- That will result into corresponding AD flag. See RFC 6147 5.5.2. + local neg_rank + if qry.parent.flags.DNSSEC_WANT and not qry.parent.flags.DNSSEC_INSECURE + then neg_rank = ffi.C.KR_RANK_SECURE + else neg_rank = ffi.C.KR_RANK_INSECURE + end + -- Find TTL bound from SOA, according to RFC 6147 5.1.7.4. + local max_ttl = 600 + for i = 1, tonumber(req.auth_selected.len) do + local entry = req.auth_selected.at[i - 1] + if entry.qry_uid == qry.parent.uid and entry.rr + and entry.rr.type == kres.type.SOA + and entry.rr.rclass == kres.class.IN then + max_ttl = entry.rr:ttl() + end + end + -- Find the As and do the conversion itself. + for i = 1, tonumber(req.answ_selected.len) do + local orig = req.answ_selected.at[i - 1] + if orig.qry_uid == qry.uid and orig.rr.type == kres.type.A then + local rank = neg_rank + if orig.rank < rank then rank = orig.rank end + -- Disable GC, as this object doesn't own owner or RDATA, it's just a reference + local ttl = orig.rr:ttl() + if ttl > max_ttl then ttl = max_ttl end + local rrs = ffi.gc(kres.rrset(nil, kres.type.AAAA, orig.rr.rclass, ttl), nil) + rrs._owner = orig.rr._owner + for k = 1, orig.rr.rrs.count do + local rdata = orig.rr:rdata( k - 1 ) + ffi.copy(addr_buf, M.proxy, 12) + ffi.copy(addr_buf + 12, rdata, 4) + ffi.C.knot_rrset_add_rdata(rrs, ffi.string(addr_buf, 16), 16, req.pool) + end + ffi.C.kr_ranked_rrarray_add( + req.answ_selected, + rrs, + rank, + true, + qry.uid, + req.pool) + end + end +end + +return M diff --git a/modules/dns64/dns64.mk b/modules/dns64/dns64.mk new file mode 100644 index 0000000..948188c --- /dev/null +++ b/modules/dns64/dns64.mk @@ -0,0 +1,2 @@ +dns64_SOURCES := dns64.lua +$(call make_lua_module,dns64) diff --git a/modules/dns64/dns64.test.lua b/modules/dns64/dns64.test.lua new file mode 100644 index 0000000..1798ccd --- /dev/null +++ b/modules/dns64/dns64.test.lua @@ -0,0 +1,52 @@ +local condition = require('cqueues.condition') + +-- setup resolver +modules = { 'hints', 'dns64' } +hints['dns64.example'] = '192.168.1.1' +hints.use_nodata(true) -- Respond NODATA to AAAA query +dns64.config('fe80::21b:77ff:0:0') + +-- helper to wait for query resolution +local function wait_resolve(qname, qtype) + local waiting, done, cond = false, false, condition.new() + local rcode, answers = kres.rcode.SERVFAIL, {} + resolve { + name = qname, + type = qtype, + finish = function (answer, _) + answer = kres.pkt_t(answer) + rcode = answer:rcode() + answers = answer:section(kres.section.ANSWER) + -- Signal as completed + if waiting then + cond:signal() + end + done = true + end, + } + -- Wait if it didn't finish immediately + if not done then + waiting = true + cond:wait() + end + return rcode, answers +end + +-- test builtin rules +local function test_builtin_rules() + local rcode, answers = wait_resolve('dns64.example', kres.type.AAAA) + same(rcode, kres.rcode.NOERROR, 'dns64.example returns NOERROR') + same(#answers, 1, 'dns64.example synthesised answer') + local expect = {'dns64.example.', '0', 'AAAA', 'fe80::21b:77ff:c0a8:101'} + if #answers > 0 then + local rr = {kres.rr2str(answers[1]):match('(%S+)%s+(%S+)%s+(%S+)%s+(%S+)')} + same(rr, expect, 'dns64.example synthesised correct AAAA record') + end +end + +-- plan tests +local tests = { + test_builtin_rules, +} + +return tests \ No newline at end of file diff --git a/modules/dnstap/README.rst b/modules/dnstap/README.rst new file mode 100644 index 0000000..442b4cf --- /dev/null +++ b/modules/dnstap/README.rst @@ -0,0 +1,24 @@ +.. _mod-dnstap: + +Dnstap +------ + +Dnstap module currently supports logging dns responses to a unix socket +in dnstap format using fstrm framing library. The unix socket and the +socket reader should be present before starting kresd. + +Configuration +^^^^^^^^^^^^^ +Tunables: + +* ``socket_path``: the the unix socket file where dnstap messages will be sent +* ``log_responses``: if true responses in wire format will be logged + +.. code-block:: lua + + modules = { + dnstap = { + socket_path = "/tmp/dnstap.sock", + log_responses = true + } + } diff --git a/modules/dnstap/dnstap.c b/modules/dnstap/dnstap.c new file mode 100644 index 0000000..0918426 --- /dev/null +++ b/modules/dnstap/dnstap.c @@ -0,0 +1,382 @@ +/* + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + * + * @file dnstap.c + * @brief dnstap based query logging support + * + */ + +#include "lib/module.h" +#include "lib/layer.h" +#include "lib/resolve.h" +#include "modules/dnstap/dnstap.pb-c.h" +#include +#include +#include "contrib/cleanup.h" + +#define DEBUG_MSG(fmt, ...) kr_log_verbose("[dnstap] " fmt, ##__VA_ARGS__); +#define CFG_SOCK_PATH "socket_path" +#define CFG_LOG_RESP_PKT "log_responses" +#define DEFAULT_SOCK_PATH "/tmp/dnstap.sock" +#define DNSTAP_CONTENT_TYPE "protobuf:dnstap.Dnstap" +#define DNSTAP_INITIAL_BUF_SIZE 256 + +#define auto_destroy_uopts __attribute__((cleanup(fstrm_unix_writer_options_destroy))) +#define auto_destroy_wopts __attribute__((cleanup(fstrm_writer_options_destroy))) + +/* Internal data structure */ +struct dnstap_data { + bool log_resp_pkt; + struct fstrm_iothr *iothread; + struct fstrm_iothr_queue *ioq; +}; + +/* + * dt_pack packs the dnstap message for transport + * https://gitlab.labs.nic.cz/knot/knot-dns/blob/master/src/contrib/dnstap/dnstap.c#L24 + * */ +uint8_t* dt_pack(const Dnstap__Dnstap *d, uint8_t **buf, size_t *sz) +{ + ProtobufCBufferSimple sbuf = { { NULL } }; + + sbuf.base.append = protobuf_c_buffer_simple_append; + sbuf.len = 0; + sbuf.alloced = DNSTAP_INITIAL_BUF_SIZE; + sbuf.data = malloc(sbuf.alloced); + if (sbuf.data == NULL) { + return NULL; + } + sbuf.must_free_data = true; + + *sz = dnstap__dnstap__pack_to_buffer(d, (ProtobufCBuffer *) &sbuf); + *buf = sbuf.data; + return *buf; +} + +/* set_address fills in address detail in dnstap_message + * https://gitlab.labs.nic.cz/knot/knot-dns/blob/master/src/contrib/dnstap/message.c#L28 + */ +static void set_address(const struct sockaddr *sockaddr, + ProtobufCBinaryData *addr, + protobuf_c_boolean *has_addr, + uint32_t *port, + protobuf_c_boolean *has_port) { + const char *saddr = kr_inaddr(sockaddr); + if (saddr == NULL) { + *has_addr = false; + *has_port = false; + return; + } + + addr->data = (uint8_t *)(saddr); + addr->len = kr_inaddr_len(sockaddr); + *has_addr = true; + *port = kr_inaddr_port(sockaddr); + *has_port = true; +} + +/* dnstap_log prepares dnstap message and sent it to fstrm */ +static int dnstap_log(kr_layer_t *ctx) { + const struct kr_request *req = ctx->req; + const struct kr_module *module = ctx->api->data; + const struct kr_rplan *rplan = &req->rplan; + const struct dnstap_data *dnstap_dt = module->data; + + /* check if we have a valid iothread */ + if (!dnstap_dt->iothread || !dnstap_dt->ioq) { + DEBUG_MSG("dnstap_dt->iothread or dnstap_dt->ioq is NULL\n"); + return kr_error(EFAULT); + } + + /* current time */ + struct timeval now; + gettimeofday(&now, NULL); + + /* Create dnstap message */ + Dnstap__Message m; + + memset(&m, 0, sizeof(m)); + + m.base.descriptor = &dnstap__message__descriptor; + /* Only handling response */ + m.type = DNSTAP__MESSAGE__TYPE__RESOLVER_RESPONSE; + + if (req->qsource.addr) { + set_address(req->qsource.addr, + &m.query_address, + &m.has_query_address, + &m.query_port, + &m.has_query_port); + } + + if (req->qsource.dst_addr) { + if (req->qsource.flags.tcp) { + m.socket_protocol = DNSTAP__SOCKET_PROTOCOL__TCP; + } else { + m.socket_protocol = DNSTAP__SOCKET_PROTOCOL__UDP; + } + m.has_socket_protocol = true; + + set_address(req->qsource.dst_addr, + &m.response_address, + &m.has_response_address, + &m.response_port, + &m.has_response_port); + switch (req->qsource.dst_addr->sa_family) { + case AF_INET: + m.socket_family = DNSTAP__SOCKET_FAMILY__INET; + m.has_socket_family = true; + break; + case AF_INET6: + m.socket_family = DNSTAP__SOCKET_FAMILY__INET6; + m.has_socket_family = true; + break; + } + } + + if (dnstap_dt->log_resp_pkt) { + const knot_pkt_t *rpkt = req->answer; + m.response_message.len = rpkt->size; + m.response_message.data = (uint8_t *)rpkt->wire; + m.has_response_message = true; + } + + /* set query time to the timestamp of the first kr_query + * set response time to now + */ + if (rplan->resolved.len > 0) { + struct kr_query *first = rplan->resolved.at[0]; + + m.query_time_sec = first->timestamp.tv_sec; + m.has_query_time_sec = true; + m.query_time_nsec = first->timestamp.tv_usec * 1000; + m.has_query_time_nsec = true; + } + + /* Response time */ + m.response_time_sec = now.tv_sec; + m.has_response_time_sec = true; + m.response_time_nsec = now.tv_usec * 1000; + m.has_response_time_nsec = true; + + /* Query Zone */ + if (rplan->resolved.len > 0) { + struct kr_query *last = array_tail(rplan->resolved); + /* Only add query_zone when not answered from cache */ + if (!(last->flags.CACHED)) { + const knot_dname_t *zone_cut_name = last->zone_cut.name; + if (zone_cut_name != NULL) { + m.query_zone.data = (uint8_t *)zone_cut_name; + m.query_zone.len = knot_dname_size(zone_cut_name); + m.has_query_zone = true; + } + } + } + + /* Create a dnstap Message */ + Dnstap__Dnstap dnstap = DNSTAP__DNSTAP__INIT; + dnstap.type = DNSTAP__DNSTAP__TYPE__MESSAGE; + dnstap.message = (Dnstap__Message *)&m; + + /* Pack the message */ + uint8_t *frame = NULL; + size_t size = 0; + dt_pack(&dnstap, &frame, &size); + if (!frame) { + return kr_error(ENOMEM); + } + + /* Submit a request to send message to fstrm_iothr*/ + fstrm_res res = fstrm_iothr_submit(dnstap_dt->iothread, dnstap_dt->ioq, frame, size, + fstrm_free_wrapper, NULL); + if (res != fstrm_res_success) { + DEBUG_MSG("Error submitting dnstap message to iothr\n"); + free(frame); + return kr_error(EBUSY); + } + + return ctx->state; +} + +KR_EXPORT +int dnstap_init(struct kr_module *module) { + /* allocated memory for internal data */ + struct dnstap_data *data = malloc(sizeof(*data)); + if (!data) { + return kr_error(ENOMEM); + } + memset(data, 0, sizeof(*data)); + + /* save pointer to internal struct in module for future reference */ + module->data = data; + return kr_ok(); +} + +KR_EXPORT +int dnstap_deinit(struct kr_module *module) { + struct dnstap_data *data = module->data; + /* Free allocated memory */ + if (data) { + fstrm_iothr_destroy(&data->iothread); + DEBUG_MSG("fstrm iothread destroyed\n"); + free(data); + } + return kr_ok(); +} + +/* dnstap_unix_writer returns a unix fstream writer + * https://gitlab.labs.nic.cz/knot/knot-dns/blob/master/src/knot/modules/dnstap.c#L159 + */ +static struct fstrm_writer* dnstap_unix_writer(const char *path) { + + auto_destroy_uopts struct fstrm_unix_writer_options *opt = fstrm_unix_writer_options_init(); + if (!opt) { + return NULL; + } + fstrm_unix_writer_options_set_socket_path(opt, path); + + auto_destroy_wopts struct fstrm_writer_options *wopt = fstrm_writer_options_init(); + if (!wopt) { + fstrm_unix_writer_options_destroy(&opt); + return NULL; + } + fstrm_writer_options_add_content_type(wopt, DNSTAP_CONTENT_TYPE, + strlen(DNSTAP_CONTENT_TYPE)); + + struct fstrm_writer *writer = fstrm_unix_writer_init(opt, wopt); + fstrm_unix_writer_options_destroy(&opt); + fstrm_writer_options_destroy(&wopt); + if (!writer) { + return NULL; + } + + fstrm_res res = fstrm_writer_open(writer); + if (res != fstrm_res_success) { + DEBUG_MSG("fstrm_writer_open returned %d\n", res); + fstrm_writer_destroy(&writer); + return NULL; + } + + return writer; +} + +/* find_string + * create a new string from json + * *var is set to pointer of new string + * node must of type JSON_STRING + * new string can be at most len bytes + */ +static int find_string(const JsonNode *node, char **val, size_t len) { + if (!node || !node->key) { + return kr_error(EINVAL); + } + assert(node->tag == JSON_STRING); + *val = strndup(node->string_, len); + assert(*val != NULL); + return kr_ok(); +} + +/* find_bool returns bool from json */ +static bool find_bool(const JsonNode *node) { + if (!node || !node->key) { + return false; + } + assert(node->tag == JSON_BOOL); + return node->bool_; +} + +/* parse config */ +KR_EXPORT +int dnstap_config(struct kr_module *module, const char *conf) { + struct dnstap_data *data = module->data; + auto_free char *sock_path = NULL; + + /* Empty conf passed, set default */ + if (!conf || strlen(conf) < 1) { + sock_path = strndup(DEFAULT_SOCK_PATH, PATH_MAX); + } else { + + JsonNode *root_node = json_decode(conf); + if (!root_node) { + DEBUG_MSG("error parsing json\n"); + return kr_error(EINVAL); + } + + JsonNode *node; + /* dnstapPath key */ + node = json_find_member(root_node, CFG_SOCK_PATH); + if (!node || find_string(node, &sock_path, PATH_MAX) != kr_ok()) { + sock_path = strndup(DEFAULT_SOCK_PATH, PATH_MAX); + } + + /* logRespPkt key */ + node = json_find_member(root_node, CFG_LOG_RESP_PKT); + if (node) { + data->log_resp_pkt = find_bool(node); + } else { + data->log_resp_pkt = false; + } + + /* clean up json, we don't need it no more */ + json_delete(root_node); + } + + DEBUG_MSG("opening sock file %s\n",sock_path); + struct fstrm_writer *writer = dnstap_unix_writer(sock_path); + if (!writer) { + DEBUG_MSG("can't create unix writer\n"); + return kr_error(EINVAL); + } + + struct fstrm_iothr_options *opt = fstrm_iothr_options_init(); + if (!opt) { + DEBUG_MSG("can't init fstrm options\n"); + fstrm_writer_destroy(&writer); + return kr_error(EINVAL); + } + + /* Create the I/O thread. */ + data->iothread = fstrm_iothr_init(opt, &writer); + fstrm_iothr_options_destroy(&opt); + if (!data->iothread) { + DEBUG_MSG("can't init fstrm_iothr\n"); + fstrm_writer_destroy(&writer); + return kr_error(ENOMEM); + } + + /* Get fstrm thread handle + * We only have one input queue, hence idx=0 + */ + data->ioq = fstrm_iothr_get_input_queue_idx(data->iothread, 0); + if (!data->ioq) { + fstrm_iothr_destroy(&data->iothread); + DEBUG_MSG("can't get fstrm queue\n"); + return kr_error(EBUSY); + } + + return kr_ok(); +} + +KR_EXPORT +const kr_layer_api_t *dnstap_layer(struct kr_module *module) { + static kr_layer_api_t _layer = { + .finish = &dnstap_log, + }; + /* Store module reference */ + _layer.data = module; + return &_layer; +} + +KR_MODULE_EXPORT(dnstap) + diff --git a/modules/dnstap/dnstap.mk b/modules/dnstap/dnstap.mk new file mode 100644 index 0000000..9a44dc2 --- /dev/null +++ b/modules/dnstap/dnstap.mk @@ -0,0 +1,8 @@ +dnstap_CFLAGS := -fPIC +dnstap_SOURCES := modules/dnstap/dnstap.pb-c.c modules/dnstap/dnstap.c +dnstap_DEPEND := $(libkres) modules/dnstap/dnstap.pb-c.c # because of generated *.h +dnstap_LIBS := $(contrib_TARGET) $(libkres_TARGET) $(libkres_LIBS) $(libprotobuf-c_LIBS) $(libfstrm_LIBS) +$(call make_c_module,dnstap) + +modules/dnstap/dnstap.pb-c.c: modules/dnstap/dnstap.proto + protoc-c $< --c_out=. diff --git a/modules/dnstap/dnstap.pb-c.c b/modules/dnstap/dnstap.pb-c.c new file mode 100644 index 0000000..94d11c3 --- /dev/null +++ b/modules/dnstap/dnstap.pb-c.c @@ -0,0 +1,523 @@ +/* Generated by the protocol buffer compiler. DO NOT EDIT! */ +/* Generated from: modules/dnstap/dnstap.proto */ + +/* Do not generate deprecated warnings for self */ +#ifndef PROTOBUF_C__NO_DEPRECATED +#define PROTOBUF_C__NO_DEPRECATED +#endif + +#include "modules/dnstap/dnstap.pb-c.h" +void dnstap__dnstap__init + (Dnstap__Dnstap *message) +{ + static Dnstap__Dnstap init_value = DNSTAP__DNSTAP__INIT; + *message = init_value; +} +size_t dnstap__dnstap__get_packed_size + (const Dnstap__Dnstap *message) +{ + assert(message->base.descriptor == &dnstap__dnstap__descriptor); + return protobuf_c_message_get_packed_size ((const ProtobufCMessage*)(message)); +} +size_t dnstap__dnstap__pack + (const Dnstap__Dnstap *message, + uint8_t *out) +{ + assert(message->base.descriptor == &dnstap__dnstap__descriptor); + return protobuf_c_message_pack ((const ProtobufCMessage*)message, out); +} +size_t dnstap__dnstap__pack_to_buffer + (const Dnstap__Dnstap *message, + ProtobufCBuffer *buffer) +{ + assert(message->base.descriptor == &dnstap__dnstap__descriptor); + return protobuf_c_message_pack_to_buffer ((const ProtobufCMessage*)message, buffer); +} +Dnstap__Dnstap * + dnstap__dnstap__unpack + (ProtobufCAllocator *allocator, + size_t len, + const uint8_t *data) +{ + return (Dnstap__Dnstap *) + protobuf_c_message_unpack (&dnstap__dnstap__descriptor, + allocator, len, data); +} +void dnstap__dnstap__free_unpacked + (Dnstap__Dnstap *message, + ProtobufCAllocator *allocator) +{ + assert(message->base.descriptor == &dnstap__dnstap__descriptor); + protobuf_c_message_free_unpacked ((ProtobufCMessage*)message, allocator); +} +void dnstap__message__init + (Dnstap__Message *message) +{ + static Dnstap__Message init_value = DNSTAP__MESSAGE__INIT; + *message = init_value; +} +size_t dnstap__message__get_packed_size + (const Dnstap__Message *message) +{ + assert(message->base.descriptor == &dnstap__message__descriptor); + return protobuf_c_message_get_packed_size ((const ProtobufCMessage*)(message)); +} +size_t dnstap__message__pack + (const Dnstap__Message *message, + uint8_t *out) +{ + assert(message->base.descriptor == &dnstap__message__descriptor); + return protobuf_c_message_pack ((const ProtobufCMessage*)message, out); +} +size_t dnstap__message__pack_to_buffer + (const Dnstap__Message *message, + ProtobufCBuffer *buffer) +{ + assert(message->base.descriptor == &dnstap__message__descriptor); + return protobuf_c_message_pack_to_buffer ((const ProtobufCMessage*)message, buffer); +} +Dnstap__Message * + dnstap__message__unpack + (ProtobufCAllocator *allocator, + size_t len, + const uint8_t *data) +{ + return (Dnstap__Message *) + protobuf_c_message_unpack (&dnstap__message__descriptor, + allocator, len, data); +} +void dnstap__message__free_unpacked + (Dnstap__Message *message, + ProtobufCAllocator *allocator) +{ + assert(message->base.descriptor == &dnstap__message__descriptor); + protobuf_c_message_free_unpacked ((ProtobufCMessage*)message, allocator); +} +static const ProtobufCEnumValue dnstap__dnstap__type__enum_values_by_number[1] = +{ + { "MESSAGE", "DNSTAP__DNSTAP__TYPE__MESSAGE", 1 }, +}; +static const ProtobufCIntRange dnstap__dnstap__type__value_ranges[] = { +{1, 0},{0, 1} +}; +static const ProtobufCEnumValueIndex dnstap__dnstap__type__enum_values_by_name[1] = +{ + { "MESSAGE", 0 }, +}; +const ProtobufCEnumDescriptor dnstap__dnstap__type__descriptor = +{ + PROTOBUF_C__ENUM_DESCRIPTOR_MAGIC, + "dnstap.Dnstap.Type", + "Type", + "Dnstap__Dnstap__Type", + "dnstap", + 1, + dnstap__dnstap__type__enum_values_by_number, + 1, + dnstap__dnstap__type__enum_values_by_name, + 1, + dnstap__dnstap__type__value_ranges, + NULL,NULL,NULL,NULL /* reserved[1234] */ +}; +static const ProtobufCFieldDescriptor dnstap__dnstap__field_descriptors[5] = +{ + { + "identity", + 1, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_BYTES, + offsetof(Dnstap__Dnstap, has_identity), + offsetof(Dnstap__Dnstap, identity), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "version", + 2, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_BYTES, + offsetof(Dnstap__Dnstap, has_version), + offsetof(Dnstap__Dnstap, version), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "extra", + 3, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_BYTES, + offsetof(Dnstap__Dnstap, has_extra), + offsetof(Dnstap__Dnstap, extra), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "message", + 14, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_MESSAGE, + 0, /* quantifier_offset */ + offsetof(Dnstap__Dnstap, message), + &dnstap__message__descriptor, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "type", + 15, + PROTOBUF_C_LABEL_REQUIRED, + PROTOBUF_C_TYPE_ENUM, + 0, /* quantifier_offset */ + offsetof(Dnstap__Dnstap, type), + &dnstap__dnstap__type__descriptor, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, +}; +static const unsigned dnstap__dnstap__field_indices_by_name[] = { + 2, /* field[2] = extra */ + 0, /* field[0] = identity */ + 3, /* field[3] = message */ + 4, /* field[4] = type */ + 1, /* field[1] = version */ +}; +static const ProtobufCIntRange dnstap__dnstap__number_ranges[2 + 1] = +{ + { 1, 0 }, + { 14, 3 }, + { 0, 5 } +}; +const ProtobufCMessageDescriptor dnstap__dnstap__descriptor = +{ + PROTOBUF_C__MESSAGE_DESCRIPTOR_MAGIC, + "dnstap.Dnstap", + "Dnstap", + "Dnstap__Dnstap", + "dnstap", + sizeof(Dnstap__Dnstap), + 5, + dnstap__dnstap__field_descriptors, + dnstap__dnstap__field_indices_by_name, + 2, dnstap__dnstap__number_ranges, + (ProtobufCMessageInit) dnstap__dnstap__init, + NULL,NULL,NULL /* reserved[123] */ +}; +static const ProtobufCEnumValue dnstap__message__type__enum_values_by_number[12] = +{ + { "AUTH_QUERY", "DNSTAP__MESSAGE__TYPE__AUTH_QUERY", 1 }, + { "AUTH_RESPONSE", "DNSTAP__MESSAGE__TYPE__AUTH_RESPONSE", 2 }, + { "RESOLVER_QUERY", "DNSTAP__MESSAGE__TYPE__RESOLVER_QUERY", 3 }, + { "RESOLVER_RESPONSE", "DNSTAP__MESSAGE__TYPE__RESOLVER_RESPONSE", 4 }, + { "CLIENT_QUERY", "DNSTAP__MESSAGE__TYPE__CLIENT_QUERY", 5 }, + { "CLIENT_RESPONSE", "DNSTAP__MESSAGE__TYPE__CLIENT_RESPONSE", 6 }, + { "FORWARDER_QUERY", "DNSTAP__MESSAGE__TYPE__FORWARDER_QUERY", 7 }, + { "FORWARDER_RESPONSE", "DNSTAP__MESSAGE__TYPE__FORWARDER_RESPONSE", 8 }, + { "STUB_QUERY", "DNSTAP__MESSAGE__TYPE__STUB_QUERY", 9 }, + { "STUB_RESPONSE", "DNSTAP__MESSAGE__TYPE__STUB_RESPONSE", 10 }, + { "TOOL_QUERY", "DNSTAP__MESSAGE__TYPE__TOOL_QUERY", 11 }, + { "TOOL_RESPONSE", "DNSTAP__MESSAGE__TYPE__TOOL_RESPONSE", 12 }, +}; +static const ProtobufCIntRange dnstap__message__type__value_ranges[] = { +{1, 0},{0, 12} +}; +static const ProtobufCEnumValueIndex dnstap__message__type__enum_values_by_name[12] = +{ + { "AUTH_QUERY", 0 }, + { "AUTH_RESPONSE", 1 }, + { "CLIENT_QUERY", 4 }, + { "CLIENT_RESPONSE", 5 }, + { "FORWARDER_QUERY", 6 }, + { "FORWARDER_RESPONSE", 7 }, + { "RESOLVER_QUERY", 2 }, + { "RESOLVER_RESPONSE", 3 }, + { "STUB_QUERY", 8 }, + { "STUB_RESPONSE", 9 }, + { "TOOL_QUERY", 10 }, + { "TOOL_RESPONSE", 11 }, +}; +const ProtobufCEnumDescriptor dnstap__message__type__descriptor = +{ + PROTOBUF_C__ENUM_DESCRIPTOR_MAGIC, + "dnstap.Message.Type", + "Type", + "Dnstap__Message__Type", + "dnstap", + 12, + dnstap__message__type__enum_values_by_number, + 12, + dnstap__message__type__enum_values_by_name, + 1, + dnstap__message__type__value_ranges, + NULL,NULL,NULL,NULL /* reserved[1234] */ +}; +static const ProtobufCFieldDescriptor dnstap__message__field_descriptors[14] = +{ + { + "type", + 1, + PROTOBUF_C_LABEL_REQUIRED, + PROTOBUF_C_TYPE_ENUM, + 0, /* quantifier_offset */ + offsetof(Dnstap__Message, type), + &dnstap__message__type__descriptor, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "socket_family", + 2, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_ENUM, + offsetof(Dnstap__Message, has_socket_family), + offsetof(Dnstap__Message, socket_family), + &dnstap__socket_family__descriptor, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "socket_protocol", + 3, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_ENUM, + offsetof(Dnstap__Message, has_socket_protocol), + offsetof(Dnstap__Message, socket_protocol), + &dnstap__socket_protocol__descriptor, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "query_address", + 4, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_BYTES, + offsetof(Dnstap__Message, has_query_address), + offsetof(Dnstap__Message, query_address), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "response_address", + 5, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_BYTES, + offsetof(Dnstap__Message, has_response_address), + offsetof(Dnstap__Message, response_address), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "query_port", + 6, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_UINT32, + offsetof(Dnstap__Message, has_query_port), + offsetof(Dnstap__Message, query_port), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "response_port", + 7, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_UINT32, + offsetof(Dnstap__Message, has_response_port), + offsetof(Dnstap__Message, response_port), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "query_time_sec", + 8, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_UINT64, + offsetof(Dnstap__Message, has_query_time_sec), + offsetof(Dnstap__Message, query_time_sec), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "query_time_nsec", + 9, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_FIXED32, + offsetof(Dnstap__Message, has_query_time_nsec), + offsetof(Dnstap__Message, query_time_nsec), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "query_message", + 10, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_BYTES, + offsetof(Dnstap__Message, has_query_message), + offsetof(Dnstap__Message, query_message), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "query_zone", + 11, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_BYTES, + offsetof(Dnstap__Message, has_query_zone), + offsetof(Dnstap__Message, query_zone), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "response_time_sec", + 12, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_UINT64, + offsetof(Dnstap__Message, has_response_time_sec), + offsetof(Dnstap__Message, response_time_sec), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "response_time_nsec", + 13, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_FIXED32, + offsetof(Dnstap__Message, has_response_time_nsec), + offsetof(Dnstap__Message, response_time_nsec), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, + { + "response_message", + 14, + PROTOBUF_C_LABEL_OPTIONAL, + PROTOBUF_C_TYPE_BYTES, + offsetof(Dnstap__Message, has_response_message), + offsetof(Dnstap__Message, response_message), + NULL, + NULL, + 0, /* flags */ + 0,NULL,NULL /* reserved1,reserved2, etc */ + }, +}; +static const unsigned dnstap__message__field_indices_by_name[] = { + 3, /* field[3] = query_address */ + 9, /* field[9] = query_message */ + 5, /* field[5] = query_port */ + 8, /* field[8] = query_time_nsec */ + 7, /* field[7] = query_time_sec */ + 10, /* field[10] = query_zone */ + 4, /* field[4] = response_address */ + 13, /* field[13] = response_message */ + 6, /* field[6] = response_port */ + 12, /* field[12] = response_time_nsec */ + 11, /* field[11] = response_time_sec */ + 1, /* field[1] = socket_family */ + 2, /* field[2] = socket_protocol */ + 0, /* field[0] = type */ +}; +static const ProtobufCIntRange dnstap__message__number_ranges[1 + 1] = +{ + { 1, 0 }, + { 0, 14 } +}; +const ProtobufCMessageDescriptor dnstap__message__descriptor = +{ + PROTOBUF_C__MESSAGE_DESCRIPTOR_MAGIC, + "dnstap.Message", + "Message", + "Dnstap__Message", + "dnstap", + sizeof(Dnstap__Message), + 14, + dnstap__message__field_descriptors, + dnstap__message__field_indices_by_name, + 1, dnstap__message__number_ranges, + (ProtobufCMessageInit) dnstap__message__init, + NULL,NULL,NULL /* reserved[123] */ +}; +static const ProtobufCEnumValue dnstap__socket_family__enum_values_by_number[2] = +{ + { "INET", "DNSTAP__SOCKET_FAMILY__INET", 1 }, + { "INET6", "DNSTAP__SOCKET_FAMILY__INET6", 2 }, +}; +static const ProtobufCIntRange dnstap__socket_family__value_ranges[] = { +{1, 0},{0, 2} +}; +static const ProtobufCEnumValueIndex dnstap__socket_family__enum_values_by_name[2] = +{ + { "INET", 0 }, + { "INET6", 1 }, +}; +const ProtobufCEnumDescriptor dnstap__socket_family__descriptor = +{ + PROTOBUF_C__ENUM_DESCRIPTOR_MAGIC, + "dnstap.SocketFamily", + "SocketFamily", + "Dnstap__SocketFamily", + "dnstap", + 2, + dnstap__socket_family__enum_values_by_number, + 2, + dnstap__socket_family__enum_values_by_name, + 1, + dnstap__socket_family__value_ranges, + NULL,NULL,NULL,NULL /* reserved[1234] */ +}; +static const ProtobufCEnumValue dnstap__socket_protocol__enum_values_by_number[2] = +{ + { "UDP", "DNSTAP__SOCKET_PROTOCOL__UDP", 1 }, + { "TCP", "DNSTAP__SOCKET_PROTOCOL__TCP", 2 }, +}; +static const ProtobufCIntRange dnstap__socket_protocol__value_ranges[] = { +{1, 0},{0, 2} +}; +static const ProtobufCEnumValueIndex dnstap__socket_protocol__enum_values_by_name[2] = +{ + { "TCP", 1 }, + { "UDP", 0 }, +}; +const ProtobufCEnumDescriptor dnstap__socket_protocol__descriptor = +{ + PROTOBUF_C__ENUM_DESCRIPTOR_MAGIC, + "dnstap.SocketProtocol", + "SocketProtocol", + "Dnstap__SocketProtocol", + "dnstap", + 2, + dnstap__socket_protocol__enum_values_by_number, + 2, + dnstap__socket_protocol__enum_values_by_name, + 1, + dnstap__socket_protocol__value_ranges, + NULL,NULL,NULL,NULL /* reserved[1234] */ +}; diff --git a/modules/dnstap/dnstap.pb-c.h b/modules/dnstap/dnstap.pb-c.h new file mode 100644 index 0000000..51d5fee --- /dev/null +++ b/modules/dnstap/dnstap.pb-c.h @@ -0,0 +1,343 @@ +/* Generated by the protocol buffer compiler. DO NOT EDIT! */ +/* Generated from: modules/dnstap/dnstap.proto */ + +#ifndef PROTOBUF_C_modules_2fdnstap_2fdnstap_2eproto__INCLUDED +#define PROTOBUF_C_modules_2fdnstap_2fdnstap_2eproto__INCLUDED + +#include + +PROTOBUF_C__BEGIN_DECLS + +#if PROTOBUF_C_VERSION_NUMBER < 1000000 +# error This file was generated by a newer version of protoc-c which is incompatible with your libprotobuf-c headers. Please update your headers. +#elif 1002001 < PROTOBUF_C_MIN_COMPILER_VERSION +# error This file was generated by an older version of protoc-c which is incompatible with your libprotobuf-c headers. Please regenerate this file with a newer version of protoc-c. +#endif + + +typedef struct _Dnstap__Dnstap Dnstap__Dnstap; +typedef struct _Dnstap__Message Dnstap__Message; + + +/* --- enums --- */ + +/* + * Identifies which field below is filled in. + */ +typedef enum _Dnstap__Dnstap__Type { + DNSTAP__DNSTAP__TYPE__MESSAGE = 1 + PROTOBUF_C__FORCE_ENUM_TO_BE_INT_SIZE(DNSTAP__DNSTAP__TYPE) +} Dnstap__Dnstap__Type; +typedef enum _Dnstap__Message__Type { + /* + * AUTH_QUERY is a DNS query message received from a resolver by an + * authoritative name server, from the perspective of the authoritative + * name server. + */ + DNSTAP__MESSAGE__TYPE__AUTH_QUERY = 1, + /* + * AUTH_RESPONSE is a DNS response message sent from an authoritative + * name server to a resolver, from the perspective of the authoritative + * name server. + */ + DNSTAP__MESSAGE__TYPE__AUTH_RESPONSE = 2, + /* + * RESOLVER_QUERY is a DNS query message sent from a resolver to an + * authoritative name server, from the perspective of the resolver. + * Resolvers typically clear the RD (recursion desired) bit when + * sending queries. + */ + DNSTAP__MESSAGE__TYPE__RESOLVER_QUERY = 3, + /* + * RESOLVER_RESPONSE is a DNS response message received from an + * authoritative name server by a resolver, from the perspective of + * the resolver. + */ + DNSTAP__MESSAGE__TYPE__RESOLVER_RESPONSE = 4, + /* + * CLIENT_QUERY is a DNS query message sent from a client to a DNS + * server which is expected to perform further recursion, from the + * perspective of the DNS server. The client may be a stub resolver or + * forwarder or some other type of software which typically sets the RD + * (recursion desired) bit when querying the DNS server. The DNS server + * may be a simple forwarding proxy or it may be a full recursive + * resolver. + */ + DNSTAP__MESSAGE__TYPE__CLIENT_QUERY = 5, + /* + * CLIENT_RESPONSE is a DNS response message sent from a DNS server to + * a client, from the perspective of the DNS server. The DNS server + * typically sets the RA (recursion available) bit when responding. + */ + DNSTAP__MESSAGE__TYPE__CLIENT_RESPONSE = 6, + /* + * FORWARDER_QUERY is a DNS query message sent from a downstream DNS + * server to an upstream DNS server which is expected to perform + * further recursion, from the perspective of the downstream DNS + * server. + */ + DNSTAP__MESSAGE__TYPE__FORWARDER_QUERY = 7, + /* + * FORWARDER_RESPONSE is a DNS response message sent from an upstream + * DNS server performing recursion to a downstream DNS server, from the + * perspective of the downstream DNS server. + */ + DNSTAP__MESSAGE__TYPE__FORWARDER_RESPONSE = 8, + /* + * STUB_QUERY is a DNS query message sent from a stub resolver to a DNS + * server, from the perspective of the stub resolver. + */ + DNSTAP__MESSAGE__TYPE__STUB_QUERY = 9, + /* + * STUB_RESPONSE is a DNS response message sent from a DNS server to a + * stub resolver, from the perspective of the stub resolver. + */ + DNSTAP__MESSAGE__TYPE__STUB_RESPONSE = 10, + /* + * TOOL_QUERY is a DNS query message sent from a DNS software tool to a + * DNS server, from the perspective of the tool. + */ + DNSTAP__MESSAGE__TYPE__TOOL_QUERY = 11, + /* + * TOOL_RESPONSE is a DNS response message received by a DNS software + * tool from a DNS server, from the perspective of the tool. + */ + DNSTAP__MESSAGE__TYPE__TOOL_RESPONSE = 12 + PROTOBUF_C__FORCE_ENUM_TO_BE_INT_SIZE(DNSTAP__MESSAGE__TYPE) +} Dnstap__Message__Type; +/* + * SocketFamily: the network protocol family of a socket. This specifies how + * to interpret "network address" fields. + */ +typedef enum _Dnstap__SocketFamily { + /* + * IPv4 (RFC 791) + */ + DNSTAP__SOCKET_FAMILY__INET = 1, + /* + * IPv6 (RFC 2460) + */ + DNSTAP__SOCKET_FAMILY__INET6 = 2 + PROTOBUF_C__FORCE_ENUM_TO_BE_INT_SIZE(DNSTAP__SOCKET_FAMILY) +} Dnstap__SocketFamily; +/* + * SocketProtocol: the transport protocol of a socket. This specifies how to + * interpret "transport port" fields. + */ +typedef enum _Dnstap__SocketProtocol { + /* + * User Datagram Protocol (RFC 768) + */ + DNSTAP__SOCKET_PROTOCOL__UDP = 1, + /* + * Transmission Control Protocol (RFC 793) + */ + DNSTAP__SOCKET_PROTOCOL__TCP = 2 + PROTOBUF_C__FORCE_ENUM_TO_BE_INT_SIZE(DNSTAP__SOCKET_PROTOCOL) +} Dnstap__SocketProtocol; + +/* --- messages --- */ + +/* + * "Dnstap": this is the top-level dnstap type, which is a "union" type that + * contains other kinds of dnstap payloads, although currently only one type + * of dnstap payload is defined. + * See: https://developers.google.com/protocol-buffers/docs/techniques#union + */ +struct _Dnstap__Dnstap +{ + ProtobufCMessage base; + /* + * DNS server identity. + * If enabled, this is the identity string of the DNS server which generated + * this message. Typically this would be the same string as returned by an + * "NSID" (RFC 5001) query. + */ + protobuf_c_boolean has_identity; + ProtobufCBinaryData identity; + /* + * DNS server version. + * If enabled, this is the version string of the DNS server which generated + * this message. Typically this would be the same string as returned by a + * "version.bind" query. + */ + protobuf_c_boolean has_version; + ProtobufCBinaryData version; + /* + * Extra data for this payload. + * This field can be used for adding an arbitrary byte-string annotation to + * the payload. No encoding or interpretation is applied or enforced. + */ + protobuf_c_boolean has_extra; + ProtobufCBinaryData extra; + Dnstap__Dnstap__Type type; + /* + * One of the following will be filled in. + */ + Dnstap__Message *message; +}; +#define DNSTAP__DNSTAP__INIT \ + { PROTOBUF_C_MESSAGE_INIT (&dnstap__dnstap__descriptor) \ + , 0,{0,NULL}, 0,{0,NULL}, 0,{0,NULL}, 0, NULL } + + +/* + * Message: a wire-format (RFC 1035 section 4) DNS message and associated + * metadata. Applications generating "Message" payloads should follow + * certain requirements based on the MessageType, see below. + */ +struct _Dnstap__Message +{ + ProtobufCMessage base; + /* + * One of the Type values described above. + */ + Dnstap__Message__Type type; + /* + * One of the SocketFamily values described above. + */ + protobuf_c_boolean has_socket_family; + Dnstap__SocketFamily socket_family; + /* + * One of the SocketProtocol values described above. + */ + protobuf_c_boolean has_socket_protocol; + Dnstap__SocketProtocol socket_protocol; + /* + * The network address of the message initiator. + * For SocketFamily INET, this field is 4 octets (IPv4 address). + * For SocketFamily INET6, this field is 16 octets (IPv6 address). + */ + protobuf_c_boolean has_query_address; + ProtobufCBinaryData query_address; + /* + * The network address of the message responder. + * For SocketFamily INET, this field is 4 octets (IPv4 address). + * For SocketFamily INET6, this field is 16 octets (IPv6 address). + */ + protobuf_c_boolean has_response_address; + ProtobufCBinaryData response_address; + /* + * The transport port of the message initiator. + * This is a 16-bit UDP or TCP port number, depending on SocketProtocol. + */ + protobuf_c_boolean has_query_port; + uint32_t query_port; + /* + * The transport port of the message responder. + * This is a 16-bit UDP or TCP port number, depending on SocketProtocol. + */ + protobuf_c_boolean has_response_port; + uint32_t response_port; + /* + * The time at which the DNS query message was sent or received, depending + * on whether this is an AUTH_QUERY, RESOLVER_QUERY, or CLIENT_QUERY. + * This is the number of seconds since the UNIX epoch. + */ + protobuf_c_boolean has_query_time_sec; + uint64_t query_time_sec; + /* + * The time at which the DNS query message was sent or received. + * This is the seconds fraction, expressed as a count of nanoseconds. + */ + protobuf_c_boolean has_query_time_nsec; + uint32_t query_time_nsec; + /* + * The initiator's original wire-format DNS query message, verbatim. + */ + protobuf_c_boolean has_query_message; + ProtobufCBinaryData query_message; + /* + * The "zone" or "bailiwick" pertaining to the DNS query message. + * This is a wire-format DNS domain name. + */ + protobuf_c_boolean has_query_zone; + ProtobufCBinaryData query_zone; + /* + * The time at which the DNS response message was sent or received, + * depending on whether this is an AUTH_RESPONSE, RESOLVER_RESPONSE, or + * CLIENT_RESPONSE. + * This is the number of seconds since the UNIX epoch. + */ + protobuf_c_boolean has_response_time_sec; + uint64_t response_time_sec; + /* + * The time at which the DNS response message was sent or received. + * This is the seconds fraction, expressed as a count of nanoseconds. + */ + protobuf_c_boolean has_response_time_nsec; + uint32_t response_time_nsec; + /* + * The responder's original wire-format DNS response message, verbatim. + */ + protobuf_c_boolean has_response_message; + ProtobufCBinaryData response_message; +}; +#define DNSTAP__MESSAGE__INIT \ + { PROTOBUF_C_MESSAGE_INIT (&dnstap__message__descriptor) \ + , 0, 0,0, 0,0, 0,{0,NULL}, 0,{0,NULL}, 0,0, 0,0, 0,0, 0,0, 0,{0,NULL}, 0,{0,NULL}, 0,0, 0,0, 0,{0,NULL} } + + +/* Dnstap__Dnstap methods */ +void dnstap__dnstap__init + (Dnstap__Dnstap *message); +size_t dnstap__dnstap__get_packed_size + (const Dnstap__Dnstap *message); +size_t dnstap__dnstap__pack + (const Dnstap__Dnstap *message, + uint8_t *out); +size_t dnstap__dnstap__pack_to_buffer + (const Dnstap__Dnstap *message, + ProtobufCBuffer *buffer); +Dnstap__Dnstap * + dnstap__dnstap__unpack + (ProtobufCAllocator *allocator, + size_t len, + const uint8_t *data); +void dnstap__dnstap__free_unpacked + (Dnstap__Dnstap *message, + ProtobufCAllocator *allocator); +/* Dnstap__Message methods */ +void dnstap__message__init + (Dnstap__Message *message); +size_t dnstap__message__get_packed_size + (const Dnstap__Message *message); +size_t dnstap__message__pack + (const Dnstap__Message *message, + uint8_t *out); +size_t dnstap__message__pack_to_buffer + (const Dnstap__Message *message, + ProtobufCBuffer *buffer); +Dnstap__Message * + dnstap__message__unpack + (ProtobufCAllocator *allocator, + size_t len, + const uint8_t *data); +void dnstap__message__free_unpacked + (Dnstap__Message *message, + ProtobufCAllocator *allocator); +/* --- per-message closures --- */ + +typedef void (*Dnstap__Dnstap_Closure) + (const Dnstap__Dnstap *message, + void *closure_data); +typedef void (*Dnstap__Message_Closure) + (const Dnstap__Message *message, + void *closure_data); + +/* --- services --- */ + + +/* --- descriptors --- */ + +extern const ProtobufCEnumDescriptor dnstap__socket_family__descriptor; +extern const ProtobufCEnumDescriptor dnstap__socket_protocol__descriptor; +extern const ProtobufCMessageDescriptor dnstap__dnstap__descriptor; +extern const ProtobufCEnumDescriptor dnstap__dnstap__type__descriptor; +extern const ProtobufCMessageDescriptor dnstap__message__descriptor; +extern const ProtobufCEnumDescriptor dnstap__message__type__descriptor; + +PROTOBUF_C__END_DECLS + + +#endif /* PROTOBUF_C_modules_2fdnstap_2fdnstap_2eproto__INCLUDED */ diff --git a/modules/dnstap/dnstap.proto b/modules/dnstap/dnstap.proto new file mode 100644 index 0000000..ed87c65 --- /dev/null +++ b/modules/dnstap/dnstap.proto @@ -0,0 +1,269 @@ +// dnstap: flexible, structured event replication format for DNS software +// +// This file contains the protobuf schemas for the "dnstap" structured event +// replication format for DNS software. + +// Written in 2013-2014 by Farsight Security, Inc. +// +// To the extent possible under law, the author(s) have dedicated all +// copyright and related and neighboring rights to this file to the public +// domain worldwide. This file is distributed without any warranty. +// +// You should have received a copy of the CC0 Public Domain Dedication along +// with this file. If not, see: +// +// . + +syntax = "proto2"; +package dnstap; + +// "Dnstap": this is the top-level dnstap type, which is a "union" type that +// contains other kinds of dnstap payloads, although currently only one type +// of dnstap payload is defined. +// See: https://developers.google.com/protocol-buffers/docs/techniques#union +message Dnstap { + // DNS server identity. + // If enabled, this is the identity string of the DNS server which generated + // this message. Typically this would be the same string as returned by an + // "NSID" (RFC 5001) query. + optional bytes identity = 1; + + // DNS server version. + // If enabled, this is the version string of the DNS server which generated + // this message. Typically this would be the same string as returned by a + // "version.bind" query. + optional bytes version = 2; + + // Extra data for this payload. + // This field can be used for adding an arbitrary byte-string annotation to + // the payload. No encoding or interpretation is applied or enforced. + optional bytes extra = 3; + + // Identifies which field below is filled in. + enum Type { + MESSAGE = 1; + } + required Type type = 15; + + // One of the following will be filled in. + optional Message message = 14; +} + +// SocketFamily: the network protocol family of a socket. This specifies how +// to interpret "network address" fields. +enum SocketFamily { + INET = 1; // IPv4 (RFC 791) + INET6 = 2; // IPv6 (RFC 2460) +} + +// SocketProtocol: the transport protocol of a socket. This specifies how to +// interpret "transport port" fields. +enum SocketProtocol { + UDP = 1; // User Datagram Protocol (RFC 768) + TCP = 2; // Transmission Control Protocol (RFC 793) +} + +// Message: a wire-format (RFC 1035 section 4) DNS message and associated +// metadata. Applications generating "Message" payloads should follow +// certain requirements based on the MessageType, see below. +message Message { + + // There are eight types of "Message" defined that correspond to the + // four arrows in the following diagram, slightly modified from RFC 1035 + // section 2: + + // +---------+ +----------+ +--------+ + // | | query | | query | | + // | Stub |-SQ--------CQ->| Recursive|-RQ----AQ->| Auth. | + // | Resolver| | Server | | Name | + // | |<-SR--------CR-| |<-RR----AR-| Server | + // +---------+ response | | response | | + // +----------+ +--------+ + + // Each arrow has two Type values each, one for each "end" of each arrow, + // because these are considered to be distinct events. Each end of each + // arrow on the diagram above has been marked with a two-letter Type + // mnemonic. Clockwise from upper left, these mnemonic values are: + // + // SQ: STUB_QUERY + // CQ: CLIENT_QUERY + // RQ: RESOLVER_QUERY + // AQ: AUTH_QUERY + // AR: AUTH_RESPONSE + // RR: RESOLVER_RESPONSE + // CR: CLIENT_RESPONSE + // SR: STUB_RESPONSE + + // Two additional types of "Message" have been defined for the + // "forwarding" case where an upstream DNS server is responsible for + // further recursion. These are not shown on the diagram above, but have + // the following mnemonic values: + + // FQ: FORWARDER_QUERY + // FR: FORWARDER_RESPONSE + + // The "Message" Type values are defined below. + + enum Type { + // AUTH_QUERY is a DNS query message received from a resolver by an + // authoritative name server, from the perspective of the authoritative + // name server. + AUTH_QUERY = 1; + + // AUTH_RESPONSE is a DNS response message sent from an authoritative + // name server to a resolver, from the perspective of the authoritative + // name server. + AUTH_RESPONSE = 2; + + // RESOLVER_QUERY is a DNS query message sent from a resolver to an + // authoritative name server, from the perspective of the resolver. + // Resolvers typically clear the RD (recursion desired) bit when + // sending queries. + RESOLVER_QUERY = 3; + + // RESOLVER_RESPONSE is a DNS response message received from an + // authoritative name server by a resolver, from the perspective of + // the resolver. + RESOLVER_RESPONSE = 4; + + // CLIENT_QUERY is a DNS query message sent from a client to a DNS + // server which is expected to perform further recursion, from the + // perspective of the DNS server. The client may be a stub resolver or + // forwarder or some other type of software which typically sets the RD + // (recursion desired) bit when querying the DNS server. The DNS server + // may be a simple forwarding proxy or it may be a full recursive + // resolver. + CLIENT_QUERY = 5; + + // CLIENT_RESPONSE is a DNS response message sent from a DNS server to + // a client, from the perspective of the DNS server. The DNS server + // typically sets the RA (recursion available) bit when responding. + CLIENT_RESPONSE = 6; + + // FORWARDER_QUERY is a DNS query message sent from a downstream DNS + // server to an upstream DNS server which is expected to perform + // further recursion, from the perspective of the downstream DNS + // server. + FORWARDER_QUERY = 7; + + // FORWARDER_RESPONSE is a DNS response message sent from an upstream + // DNS server performing recursion to a downstream DNS server, from the + // perspective of the downstream DNS server. + FORWARDER_RESPONSE = 8; + + // STUB_QUERY is a DNS query message sent from a stub resolver to a DNS + // server, from the perspective of the stub resolver. + STUB_QUERY = 9; + + // STUB_RESPONSE is a DNS response message sent from a DNS server to a + // stub resolver, from the perspective of the stub resolver. + STUB_RESPONSE = 10; + + // TOOL_QUERY is a DNS query message sent from a DNS software tool to a + // DNS server, from the perspective of the tool. + TOOL_QUERY = 11; + + // TOOL_RESPONSE is a DNS response message received by a DNS software + // tool from a DNS server, from the perspective of the tool. + TOOL_RESPONSE = 12; + } + + // One of the Type values described above. + required Type type = 1; + + // One of the SocketFamily values described above. + optional SocketFamily socket_family = 2; + + // One of the SocketProtocol values described above. + optional SocketProtocol socket_protocol = 3; + + // The network address of the message initiator. + // For SocketFamily INET, this field is 4 octets (IPv4 address). + // For SocketFamily INET6, this field is 16 octets (IPv6 address). + optional bytes query_address = 4; + + // The network address of the message responder. + // For SocketFamily INET, this field is 4 octets (IPv4 address). + // For SocketFamily INET6, this field is 16 octets (IPv6 address). + optional bytes response_address = 5; + + // The transport port of the message initiator. + // This is a 16-bit UDP or TCP port number, depending on SocketProtocol. + optional uint32 query_port = 6; + + // The transport port of the message responder. + // This is a 16-bit UDP or TCP port number, depending on SocketProtocol. + optional uint32 response_port = 7; + + // The time at which the DNS query message was sent or received, depending + // on whether this is an AUTH_QUERY, RESOLVER_QUERY, or CLIENT_QUERY. + // This is the number of seconds since the UNIX epoch. + optional uint64 query_time_sec = 8; + + // The time at which the DNS query message was sent or received. + // This is the seconds fraction, expressed as a count of nanoseconds. + optional fixed32 query_time_nsec = 9; + + // The initiator's original wire-format DNS query message, verbatim. + optional bytes query_message = 10; + + // The "zone" or "bailiwick" pertaining to the DNS query message. + // This is a wire-format DNS domain name. + optional bytes query_zone = 11; + + // The time at which the DNS response message was sent or received, + // depending on whether this is an AUTH_RESPONSE, RESOLVER_RESPONSE, or + // CLIENT_RESPONSE. + // This is the number of seconds since the UNIX epoch. + optional uint64 response_time_sec = 12; + + // The time at which the DNS response message was sent or received. + // This is the seconds fraction, expressed as a count of nanoseconds. + optional fixed32 response_time_nsec = 13; + + // The responder's original wire-format DNS response message, verbatim. + optional bytes response_message = 14; +} + +// All fields except for 'type' in the Message schema are optional. +// It is recommended that at least the following fields be filled in for +// particular types of Messages. + +// AUTH_QUERY: +// socket_family, socket_protocol +// query_address, query_port +// query_message +// query_time_sec, query_time_nsec + +// AUTH_RESPONSE: +// socket_family, socket_protocol +// query_address, query_port +// query_time_sec, query_time_nsec +// response_message +// response_time_sec, response_time_nsec + +// RESOLVER_QUERY: +// socket_family, socket_protocol +// query_message +// query_time_sec, query_time_nsec +// query_zone +// response_address, response_port + +// RESOLVER_RESPONSE: +// socket_family, socket_protocol +// query_time_sec, query_time_nsec +// query_zone +// response_address, response_port +// response_message +// response_time_sec, response_time_nsec + +// CLIENT_QUERY: +// socket_family, socket_protocol +// query_message +// query_time_sec, query_time_nsec + +// CLIENT_RESPONSE: +// socket_family, socket_protocol +// query_time_sec, query_time_nsec +// response_message +// response_time_sec, response_time_nsec diff --git a/modules/edns_keepalive/README.rst b/modules/edns_keepalive/README.rst new file mode 100644 index 0000000..7938632 --- /dev/null +++ b/modules/edns_keepalive/README.rst @@ -0,0 +1,12 @@ +.. _mod-edns_keepalive: + +EDNS keepalive +-------------- + +The ``edns_keepalive`` module implements :rfc:`7828` for *clients* connecting to Knot Resolver via TCP and TLS. +Note that client connections are timed-out the same way *regardless* of them sending the EDNS option; +the module just allows clients to discover the timeout. + +When connecting to servers, Knot Resolver does not send this EDNS option. +It still attempts to reuse established connections intelligently. + diff --git a/modules/edns_keepalive/edns_keepalive.c b/modules/edns_keepalive/edns_keepalive.c new file mode 100644 index 0000000..99c0d96 --- /dev/null +++ b/modules/edns_keepalive/edns_keepalive.c @@ -0,0 +1,77 @@ +/* Copyright (C) 2018 CZ.NIC, z.s.p.o. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + */ + +/** + * @file edns_keepalive.c + * @brief Minimalistic EDNS keepalive implementation on server side. + * If keepalive option is present in query, + * always reply with constant timeout value. + * + */ +#include +#include "daemon/worker.h" +#include "lib/module.h" +#include "lib/layer.h" + +static int edns_keepalive_finalize(kr_layer_t *ctx) +{ + struct kr_request *req = ctx->req; + knot_pkt_t *answer = req->answer; + const knot_rrset_t *src_opt = req->qsource.packet->opt_rr; + knot_rrset_t *answ_opt = answer->opt_rr; + + const bool ka_want = + req->qsource.flags.tcp && + src_opt != NULL && + knot_edns_get_option(src_opt, KNOT_EDNS_OPTION_TCP_KEEPALIVE) && + answ_opt != NULL; + if (!ka_want) { + return ctx->state; + } + const struct worker_ctx *worker = (const struct worker_ctx *)req->daemon_context; + assert(worker); + const struct network *net = &worker->engine->net; + uint64_t timeout = net->tcp.in_idle_timeout / 100; + if (timeout > UINT16_MAX) { + timeout = UINT16_MAX; + } + knot_mm_t *pool = &answer->mm; + uint16_t ka_size = knot_edns_keepalive_size(timeout); + uint8_t ka_buf[ka_size]; + int ret = knot_edns_keepalive_write(ka_buf, ka_size, timeout); + if (ret == KNOT_EOK) { + ret = knot_edns_add_option(answ_opt, KNOT_EDNS_OPTION_TCP_KEEPALIVE, + ka_size, ka_buf, pool); + } + if (ret != KNOT_EOK) { + ctx->state = KR_STATE_FAIL; + } + return ctx->state; +} + +KR_EXPORT +const kr_layer_api_t *edns_keepalive_layer(struct kr_module *module) +{ + static kr_layer_api_t _layer = { + .answer_finalize = &edns_keepalive_finalize, + }; + /* Store module reference */ + _layer.data = module; + return &_layer; +} + +KR_MODULE_EXPORT(edns_keepalive) + diff --git a/modules/edns_keepalive/edns_keepalive.mk b/modules/edns_keepalive/edns_keepalive.mk new file mode 100644 index 0000000..4ce2bd9 --- /dev/null +++ b/modules/edns_keepalive/edns_keepalive.mk @@ -0,0 +1,5 @@ +edns_keepalive_CFLAGS := -fPIC +edns_keepalive_LDFLAGS := -Wl,-undefined -Wl,dynamic_lookup +edns_keepalive_SOURCES := modules/edns_keepalive/edns_keepalive.c +$(call make_c_module,edns_keepalive) + diff --git a/modules/etcd/README.rst b/modules/etcd/README.rst new file mode 100644 index 0000000..5de55c2 --- /dev/null +++ b/modules/etcd/README.rst @@ -0,0 +1,44 @@ +.. _mod-etcd: + +Etcd module +----------- + +The module connects to Etcd peers and watches for configuration change. +By default, the module looks for the subtree under ``/knot-resolver`` directory, +but you can change this `in the configuration `_. + +The subtree structure corresponds to the configuration variables in the declarative style. + +.. code-block:: bash + + $ etcdctl set /knot-resolvevr/net/127.0.0.1 53 + $ etcdctl set /knot-resolver/cache/size 10000000 + +Configures all listening nodes to following configuration: + +.. code-block:: lua + + net = { '127.0.0.1' } + cache.size = 10000000 + +Example configuration +^^^^^^^^^^^^^^^^^^^^^ + +.. code-block:: lua + + modules = { + etcd = { + prefix = '/knot-resolver', + peer = 'http://127.0.0.1:7001' + } + } + +.. warning:: Work in progress! + +Dependencies +^^^^^^^^^^^^ + +* `lua-etcd `_ available in LuaRocks + + ``$ luarocks install etcd --from=https://mah0x211.github.io/rocks/`` + diff --git a/modules/etcd/etcd.lua b/modules/etcd/etcd.lua new file mode 100644 index 0000000..4d4bbfb --- /dev/null +++ b/modules/etcd/etcd.lua @@ -0,0 +1,55 @@ +--- @module etcd +local etcd = {} + +-- @function update subtree configuration +local function update_subtree(tree) + if not tree then return end + for _, k in pairs(tree) do + if k.dir then + update_subtree(k.nodes) + else + local key,opt = k.key:gmatch('([^/]+)/([^/]+)$')() + if _G[key][opt] ~= k.value then + _G[key][opt] = k.value + end + end + end +end + +-- @function reload whole configuration +function etcd.reload() + local res, err = etcd.cli:readdir('/', true) + if err then + error(err) + end + update_subtree(res.body.node.nodes) +end + +function etcd.init() + etcd.Etcd = require('etcd.luasocket') + etcd.defaults = { prefix = '/knot-resolver' } +end + +function etcd.deinit() + if etcd.ev then event.cancel(etcd.ev) end +end + +function etcd.config(conf) + local options = etcd.defaults + if type(conf) == 'table' then + for k,v in pairs(conf) do options[k] = v end + end + -- create connection + local cli, err = etcd.Etcd.new(options) + if err then + error(err) + end + etcd.cli = cli + -- schedule recurrent polling + -- @todo: the etcd has watch() API, but this requires + -- coroutines on socket operations + if etcd.ev then event.cancel(etcd.ev) end + etcd.ev = event.recurrent(5 * sec, etcd.reload) +end + +return etcd diff --git a/modules/etcd/etcd.mk b/modules/etcd/etcd.mk new file mode 100644 index 0000000..0b8d244 --- /dev/null +++ b/modules/etcd/etcd.mk @@ -0,0 +1,2 @@ +etcd_SOURCES := etcd.lua +$(call make_lua_module,etcd) diff --git a/modules/experimental_dot_auth/README.rst b/modules/experimental_dot_auth/README.rst new file mode 100644 index 0000000..79c963b --- /dev/null +++ b/modules/experimental_dot_auth/README.rst @@ -0,0 +1,84 @@ +.. _mod-experimental_dot_auth: + +Experimental DNS-over-TLS Auto-discovery +---------------------------------------- + +This experimental module provides automatic discovery of authoritative servers' supporting DNS-over-TLS. +The module uses magic NS names to detect SPKI_ fingerprint which is very similar to `dnscurve`_ mechanism. + +.. warning:: This protocol and module is experimental and can be changed or removed at any time. Use at own risk, security properties were not analyzed! + +How it works +^^^^^^^^^^^^ + +The module will look for NS target names formatted as: +``dot-{base32(sha256(SPKI))}....`` + +For instance, Knot Resolver will detect NS names formatted like this + +.. code-block:: none + + example.com NS dot-tpwxmgqdaurcqxqsckxvdq5sty3opxlgcbjj43kumdq62kpqr72a.example.com + +and automatically discover that example.com NS supports DoT with the base64-encoded SPKI digest of ``m+12GgMFIiheEhKvUcOynjbn3WYQUp5tVGDh7Snwj/Q=`` +and will associate it with the IPs of ``dot-tpwxmgqdaurcqxqsckxvdq5sty3opxlgcbjj43kumdq62kpqr72a.example.com``. + +In that example, the base32 encoded (no padding) version of the sha256 PIN is ``tpwxmgqdaurcqxqsckxvdq5sty3opxlgcbjj43kumdq62kpqr72a``, which when +converted to base64 translates to ``m+12GgMFIiheEhKvUcOynjbn3WYQUp5tVGDh7Snwj/Q=``. + +Generating NS target names +^^^^^^^^^^^^^^^^^^^^^^^^^^ + +To generate the NS target name, use the following command to generate the base32 encoded string of the SPKI fingerprint: + +.. code-block:: bash + + openssl x509 -in /path/to/cert.pem -pubkey -noout | \ + openssl pkey -pubin -outform der | \ + openssl dgst -sha256 -binary | \ + base32 | tr -d '=' | tr '[:upper:]' '[:lower:]' + tpwxmgqdaurcqxqsckxvdq5sty3opxlgcbjj43kumdq62kpqr72a + +Then add a target to your NS with: ``dot-${b32}.a.example.com`` + +Finally, map ``dot-${b32}.a.example.com`` to the right set of IPs. + +.. code-block:: bash + + ... + ... + ;; QUESTION SECTION: + ;example.com. IN NS + + ;; AUTHORITY SECTION: + example.com. 3600 IN NS dot-tpwxmgqdaurcqxqsckxvdq5sty3opxlgcbjj43kumdq62kpqr72a.a.example.com. + example.com. 3600 IN NS dot-tpwxmgqdaurcqxqsckxvdq5sty3opxlgcbjj43kumdq62kpqr72a.b.example.com. + + ;; ADDITIONAL SECTION: + dot-tpwxmgqdaurcqxqsckxvdq5sty3opxlgcbjj43kumdq62kpqr72a.a.example.com. 3600 IN A 192.0.2.1 + dot-tpwxmgqdaurcqxqsckxvdq5sty3opxlgcbjj43kumdq62kpqr72a.b.example.com. 3600 IN AAAA 2001:DB8::1 + ... + ... + +Example configuration +^^^^^^^^^^^^^^^^^^^^^ + +To enable the module, add this snippet to your config: + +.. code-block:: lua + + -- Start an experiment, use with caution + modules.load('experimental_dot_auth') + +This module requires standard ``basexx`` Lua library which is typically provided by ``lua-basexx`` package. + +Caveats +^^^^^^^ + +The module relies on seeing the reply of the NS query and as such will not work +if Knot Resolver uses data from its cache. You may need to delete the cache before starting ``kresd`` to work around this. + +The module also assumes that the NS query answer will return both the NS targets in the Authority section as well as the glue records in the Additional section. + +.. _dnscurve: https://dnscurve.org/ +.. _SPKI: https://en.wikipedia.org/wiki/Simple_public-key_infrastructure diff --git a/modules/experimental_dot_auth/basexx.lua b/modules/experimental_dot_auth/basexx.lua new file mode 100644 index 0000000..86ac996 --- /dev/null +++ b/modules/experimental_dot_auth/basexx.lua @@ -0,0 +1,320 @@ +-- The MIT License (MIT) +-- +-- Copyright (c) 2013 aiq +-- +-- Permission is hereby granted, free of charge, to any person obtaining a copy of +-- this software and associated documentation files (the "Software"), to deal in +-- the Software without restriction, including without limitation the rights to +-- use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of +-- the Software, and to permit persons to whom the Software is furnished to do so, +-- subject to the following conditions: +-- +-- The above copyright notice and this permission notice shall be included in all +-- copies or substantial portions of the Software. +-- +-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS +-- FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR +-- COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER +-- IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +-- CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +-- +-- +-- +-------------------------------------------------------------------------------- +-- util functions +-------------------------------------------------------------------------------- + +local function divide_string( str, max ) + local result = {} + + local start = 1 + for i = 1, #str do + if i % max == 0 then + table.insert( result, str:sub( start, i ) ) + start = i + 1 + elseif i == #str then + table.insert( result, str:sub( start, i ) ) + end + end + + return result +end + +local function number_to_bit( num, length ) + local bits = {} + + while num > 0 do + local rest = math.floor( math.fmod( num, 2 ) ) + table.insert( bits, rest ) + num = ( num - rest ) / 2 + end + + while #bits < length do + table.insert( bits, "0" ) + end + + return string.reverse( table.concat( bits ) ) +end + +local function ignore_set( str, set ) + if set then + str = str:gsub( "["..set.."]", "" ) + end + return str +end + +local function pure_from_bit( str ) + return ( str:gsub( '........', function ( cc ) + return string.char( tonumber( cc, 2 ) ) + end ) ) +end + +local function unexpected_char_error( str, pos ) + local c = string.sub( str, pos, pos ) + return string.format( "unexpected character at position %d: '%s'", pos, c ) +end + +-------------------------------------------------------------------------------- + +local basexx = {} + +-------------------------------------------------------------------------------- +-- base2(bitfield) decode and encode function +-------------------------------------------------------------------------------- + +local bitMap = { o = "0", i = "1", l = "1" } + +function basexx.from_bit( str, ignore ) + str = ignore_set( str, ignore ) + str = string.lower( str ) + str = str:gsub( '[ilo]', function( c ) return bitMap[ c ] end ) + local pos = string.find( str, "[^01]" ) + if pos then return nil, unexpected_char_error( str, pos ) end + + return pure_from_bit( str ) +end + +function basexx.to_bit( str ) + return ( str:gsub( '.', function ( c ) + local byte = string.byte( c ) + local bits = {} + for _ = 1,8 do + table.insert( bits, byte % 2 ) + byte = math.floor( byte / 2 ) + end + return table.concat( bits ):reverse() + end ) ) +end + +-------------------------------------------------------------------------------- +-- base16(hex) decode and encode function +-------------------------------------------------------------------------------- + +function basexx.from_hex( str, ignore ) + str = ignore_set( str, ignore ) + local pos = string.find( str, "[^%x]" ) + if pos then return nil, unexpected_char_error( str, pos ) end + + return ( str:gsub( '..', function ( cc ) + return string.char( tonumber( cc, 16 ) ) + end ) ) +end + +function basexx.to_hex( str ) + return ( str:gsub( '.', function ( c ) + return string.format('%02X', string.byte( c ) ) + end ) ) +end + +-------------------------------------------------------------------------------- +-- generic function to decode and encode base32/base64 +-------------------------------------------------------------------------------- + +local function from_basexx( str, alphabet, bits ) + local result = {} + for i = 1, #str do + local c = string.sub( str, i, i ) + if c ~= '=' then + local index = string.find( alphabet, c, 1, true ) + if not index then + return nil, unexpected_char_error( str, i ) + end + table.insert( result, number_to_bit( index - 1, bits ) ) + end + end + + local value = table.concat( result ) + local pad = #value % 8 + return pure_from_bit( string.sub( value, 1, #value - pad ) ) +end + +local function to_basexx( str, alphabet, bits, pad ) + local bitString = basexx.to_bit( str ) + + local chunks = divide_string( bitString, bits ) + local result = {} + for _,value in ipairs( chunks ) do + if ( #value < bits ) then + value = value .. string.rep( '0', bits - #value ) + end + local pos = tonumber( value, 2 ) + 1 + table.insert( result, alphabet:sub( pos, pos ) ) + end + + table.insert( result, pad ) + return table.concat( result ) +end + +-------------------------------------------------------------------------------- +-- rfc 3548: http://www.rfc-editor.org/rfc/rfc3548.txt +-------------------------------------------------------------------------------- + +local base32Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567" +local base32PadMap = { "", "======", "====", "===", "=" } + +function basexx.from_base32( str, ignore ) + str = ignore_set( str, ignore ) + return from_basexx( string.upper( str ), base32Alphabet, 5 ) +end + +function basexx.to_base32( str ) + return to_basexx( str, base32Alphabet, 5, base32PadMap[ #str % 5 + 1 ] ) +end + +-------------------------------------------------------------------------------- +-- crockford: http://www.crockford.com/wrmg/base32.html +-------------------------------------------------------------------------------- + +local crockfordAlphabet = "0123456789ABCDEFGHJKMNPQRSTVWXYZ" +local crockfordMap = { O = "0", I = "1", L = "1" } + +function basexx.from_crockford( str, ignore ) + str = ignore_set( str, ignore ) + str = string.upper( str ) + str = str:gsub( '[ILOU]', function( c ) return crockfordMap[ c ] end ) + return from_basexx( str, crockfordAlphabet, 5 ) +end + +function basexx.to_crockford( str ) + return to_basexx( str, crockfordAlphabet, 5, "" ) +end + +-------------------------------------------------------------------------------- +-- base64 decode and encode function +-------------------------------------------------------------------------------- + +local base64Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".. + "abcdefghijklmnopqrstuvwxyz".. + "0123456789+/" +local base64PadMap = { "", "==", "=" } + +function basexx.from_base64( str, ignore ) + str = ignore_set( str, ignore ) + return from_basexx( str, base64Alphabet, 6 ) +end + +function basexx.to_base64( str ) + return to_basexx( str, base64Alphabet, 6, base64PadMap[ #str % 3 + 1 ] ) +end + +-------------------------------------------------------------------------------- +-- URL safe base64 decode and encode function +-------------------------------------------------------------------------------- + +local url64Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".. + "abcdefghijklmnopqrstuvwxyz".. + "0123456789-_" + +function basexx.from_url64( str, ignore ) + str = ignore_set( str, ignore ) + return from_basexx( str, url64Alphabet, 6 ) +end + +function basexx.to_url64( str ) + return to_basexx( str, url64Alphabet, 6, "" ) +end + +-------------------------------------------------------------------------------- +-- +-------------------------------------------------------------------------------- + +local function length_error( len, d ) + return string.format( "invalid length: %d - must be a multiple of %d", len, d ) +end + +local z85Decoder = { 0x00, 0x44, 0x00, 0x54, 0x53, 0x52, 0x48, 0x00, + 0x4B, 0x4C, 0x46, 0x41, 0x00, 0x3F, 0x3E, 0x45, + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x40, 0x00, 0x49, 0x42, 0x4A, 0x47, + 0x51, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, + 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, + 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, + 0x3B, 0x3C, 0x3D, 0x4D, 0x00, 0x4E, 0x43, 0x00, + 0x00, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, + 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, + 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, + 0x21, 0x22, 0x23, 0x4F, 0x00, 0x50, 0x00, 0x00 } + +function basexx.from_z85( str, ignore ) + str = ignore_set( str, ignore ) + if ( #str % 5 ) ~= 0 then + return nil, length_error( #str, 5 ) + end + + local result = {} + + local value = 0 + for i = 1, #str do + local index = string.byte( str, i ) - 31 + if index < 1 or index >= #z85Decoder then + return nil, unexpected_char_error( str, i ) + end + value = ( value * 85 ) + z85Decoder[ index ] + if ( i % 5 ) == 0 then + local divisor = 256 * 256 * 256 + while divisor ~= 0 do + local b = math.floor( value / divisor ) % 256 + table.insert( result, string.char( b ) ) + divisor = math.floor( divisor / 256 ) + end + value = 0 + end + end + + return table.concat( result ) +end + +local z85Encoder = "0123456789".. + "abcdefghijklmnopqrstuvwxyz".. + "ABCDEFGHIJKLMNOPQRSTUVWXYZ".. + ".-:+=^!/*?&<>()[]{}@%$#" + +function basexx.to_z85( str ) + if ( #str % 4 ) ~= 0 then + return nil, length_error( #str, 4 ) + end + + local result = {} + + local value = 0 + for i = 1, #str do + local b = string.byte( str, i ) + value = ( value * 256 ) + b + if ( i % 4 ) == 0 then + local divisor = 85 * 85 * 85 * 85 + while divisor ~= 0 do + local index = ( math.floor( value / divisor ) % 85 ) + 1 + table.insert( result, z85Encoder:sub( index, index ) ) + divisor = math.floor( divisor / 85 ) + end + value = 0 + end + end + + return table.concat( result ) +end + +-------------------------------------------------------------------------------- + +return basexx diff --git a/modules/experimental_dot_auth/experimental_dot_auth.lua b/modules/experimental_dot_auth/experimental_dot_auth.lua new file mode 100644 index 0000000..f5ab6be --- /dev/null +++ b/modules/experimental_dot_auth/experimental_dot_auth.lua @@ -0,0 +1,122 @@ +-- Module interface + +local ffi = require('ffi') +local basexx = require('basexx') +local C = ffi.C + +-- Export module interface +local M = {} +M.layer = {} +local base32 = {} +local str = {} +local AF_INET = 2 +local AF_INET6 = 10 +local INET_ADDRSTRLEN = 16 +local INET6_ADDRSTRLEN = 46 + +ffi.cdef[[ +/* + * Data structures + */ +typedef int socklen_t; + struct sockaddr_storage{ + unsigned short int ss_family; + unsigned long int __ss_align; + char __ss_padding[128 - (2 *sizeof(unsigned long int))]; + }; + struct in_addr{ + unsigned char s_addr[4]; + }; + struct in6_addr{ + unsigned char s6_addr[16]; + }; + struct sockaddr_in{ + short sin_family; + unsigned short sin_port; + struct in_addr sin_addr; + char sin_zero[8]; + } __attribute__ ((__packed__)); + struct sockaddr_in6{ + unsigned short sin6_family; + unsigned short sin6_port; + unsigned int sin6_flowinfo; + struct in6_addr sin6_addr; + unsigned int sin6_scope_id; + }; + typedef unsigned short sa_family_t; + struct sockaddr_un { + sa_family_t sun_family; + char sun_path[108]; + }; + const char *inet_ntop( + int af, + const void *cp, + char *buf, + socklen_t len); +]] + +function base32.pad(b32) + local m = #b32 % 8 + if m ~= 0 then + b32 = b32 .. string.rep("=", 8 - m) + end + return b32 +end + +function str.starts(String,Start) + return string.sub(String,1,string.len(Start))==Start +end + +-- Handle DoT signalling NS domains. +function M.layer.consume(state, _, pkt) + if state == kres.FAIL then return state end + -- Only successful answers + pkt = kres.pkt_t(pkt) + -- log("%s", pkt:tostring()) + local authority = pkt:section(kres.section.AUTHORITY) + local additional = pkt:section(kres.section.ADDITIONAL) + for _, rr in ipairs(authority) do + --log("%d %s", rr.type, kres.dname2str(rr.rdata)) + if rr.type == kres.type.NS then + local name = kres.dname2str(rr.rdata):upper() + -- log("NS %d", name:len()) + if name:len() > 56 and str.starts(name, "DOT-") then + local k = basexx.to_base64( + basexx.from_base32( + base32.pad(string.sub(name, 5, string.find(name, '[.]') - 1)) + ) + ) + for _, rr_add in ipairs(additional) do + if rr_add.type == kres.type.A or rr_add.type == kres.type.AAAA then + local name_add = kres.dname2str(rr_add.owner):upper() + if name == name_add then + local addrbuf + if rr_add.type == kres.type.A then + local ns_addr = ffi.new("struct sockaddr_in") + ns_addr.sin_family = AF_INET + + ns_addr.sin_addr.s_addr = rr_add.rdata + addrbuf = ffi.new("char[?]", INET_ADDRSTRLEN) + C.inet_ntop(AF_INET, ns_addr.sin_addr, addrbuf, INET_ADDRSTRLEN) + else + local ns_addr = ffi.new("struct sockaddr_in6") + ns_addr.sin6_family = AF_INET6 + + ns_addr.sin6_addr.s6_addr = rr_add.rdata + addrbuf = ffi.new("char[?]", INET6_ADDRSTRLEN) + C.inet_ntop(AF_INET6, ns_addr.sin6_addr, addrbuf, INET6_ADDRSTRLEN) + end + net.tls_client(ffi.string(addrbuf).."@853", {k}) + log("Adding %s IP %s %s", name_add, ffi.string(addrbuf).."@853", k) + end + end + end + end + end + end + + return state + +end + +return M diff --git a/modules/experimental_dot_auth/experimental_dot_auth.mk b/modules/experimental_dot_auth/experimental_dot_auth.mk new file mode 100644 index 0000000..6f93fcd --- /dev/null +++ b/modules/experimental_dot_auth/experimental_dot_auth.mk @@ -0,0 +1,2 @@ +experimental_dot_auth_SOURCES := experimental_dot_auth.lua basexx.lua +$(call make_lua_module,experimental_dot_auth) diff --git a/modules/graphite/README.rst b/modules/graphite/README.rst new file mode 100644 index 0000000..06efd82 --- /dev/null +++ b/modules/graphite/README.rst @@ -0,0 +1,49 @@ +.. _mod-graphite: + +Graphite module +--------------- + +The module sends statistics over the Graphite_ protocol to either Graphite_, Metronome_, InfluxDB_ or any compatible storage. This allows powerful visualization over metrics collected by Knot Resolver. + +.. tip:: The Graphite server is challenging to get up and running, InfluxDB_ combined with Grafana_ are much easier, and provide richer set of options and available front-ends. Metronome_ by PowerDNS alternatively provides a mini-graphite server for much simpler setups. + +Example configuration +^^^^^^^^^^^^^^^^^^^^^ + +Only the ``host`` parameter is mandatory. + +By default the module uses UDP so it doesn't guarantee the delivery, set ``tcp = true`` to enable Graphite over TCP. If the TCP consumer goes down or the connection with Graphite is lost, resolver will periodically attempt to reconnect with it. + +.. code-block:: lua + + modules = { + graphite = { + prefix = hostname(), -- optional metric prefix + host = '127.0.0.1', -- graphite server address + port = 2003, -- graphite server port + interval = 5 * sec, -- publish interval + tcp = false -- set to true if want TCP mode + } + } + +The module supports sending data to multiple servers at once. + +.. code-block:: lua + + modules = { + graphite = { + host = { '127.0.0.1', '1.2.3.4', '::1' }, + } + } + +Dependencies +^^^^^^^^^^^^ + +* `luasocket `_ available in LuaRocks + + ``$ luarocks install luasocket`` + +.. _Graphite: https://graphite.readthedocs.io/en/latest/feeding-carbon.html +.. _InfluxDB: https://influxdb.com/ +.. _Metronome: https://github.com/ahuPowerDNS/metronome +.. _Grafana: http://grafana.org/ diff --git a/modules/graphite/graphite.lua b/modules/graphite/graphite.lua new file mode 100644 index 0000000..bbf735a --- /dev/null +++ b/modules/graphite/graphite.lua @@ -0,0 +1,141 @@ +-- Load dependent modules +if not stats then modules.load('stats') end + +-- This is leader-only module +if worker.id > 0 then return {} end +local M = {} +local socket = require('socket') + +-- Create connected UDP socket +local function make_udp(host, port) + local s, err, status + if host:find(':') then + s, err = socket.udp6() + else + s, err = socket.udp() + end + if not s then + return nil, err + end + status, err = s:setpeername(host, port) + if not status then + return nil, err + end + return s +end + +-- Create connected TCP socket +local function make_tcp(host, port) + local s, err, status + if host:find(':') then + s, err = socket.tcp6() + else + s, err = socket.tcp() + end + if not s then + return nil, err + end + status, err = s:connect(host, port) + if not status then + return s, err + end + return s +end + +local function merge(results) + local t = {} + for _, result in ipairs(results) do + for k, v in pairs(result) do + t[k] = (t[k] or 0) + v + end + end + return t +end + +-- Send the metrics in a table to multiple Graphite consumers +local function publish_table(metrics, prefix, now) + for key,val in pairs(metrics) do + local msg = key..' '..val..' '..now..'\n' + if prefix then + msg = prefix..'.'..msg + end + for i in ipairs(M.cli) do + local ok, err = M.cli[i]:send(msg) + if not ok then + -- Best-effort reconnect once per two tries + local tcp = M.cli[i]['connect'] ~= nil + local host = M.info[i] + if tcp and host.seen + 2 * M.interval / 1000 <= now then + print(string.format('[graphite] reconnecting: %s@%d reason: %s', + host.addr, host.port, err)) + M.cli[i] = make_tcp(host.addr, host.port) + host.seen = now + end + end + end + end +end + +function M.init() + M.ev = nil + M.cli = {} + M.info = {} + M.interval = 5 * sec + M.prefix = 'kresd.' .. hostname() + return 0 +end + +function M.deinit() + if M.ev then event.cancel(M.ev) end + return 0 +end + +-- @function Publish results to the Graphite server(s) +function M.publish() + local now = os.time() + -- Publish built-in statistics + if not M.cli then error("no graphite server configured") end + publish_table(merge(map 'cache.stats()'), M.prefix..'.cache', now) + publish_table(merge(map 'worker.stats()'), M.prefix..'.worker', now) + -- Publish extended statistics if available + publish_table(merge(map 'stats.list()'), M.prefix, now) + return 0 +end + +-- @function Make connection to Graphite server. +function M.add_server(_, host, port, tcp) + local s, err + if tcp then + s, err = make_tcp(host, port) + else + s, err = make_udp(host, port) + end + if not s then + error(err) + end + table.insert(M.cli, s) + table.insert(M.info, {addr = host, port = port, seen = 0}) + return 0 +end + +function M.config(conf) + -- config defaults + if not conf then return 0 end + if not conf.port then conf.port = 2003 end + if conf.interval then M.interval = conf.interval end + if conf.prefix then M.prefix = conf.prefix end + -- connect to host(s) + if type(conf.host) == 'table' then + for _, val in pairs(conf.host) do + M:add_server(val, conf.port, conf.tcp) + end + else + M:add_server(conf.host, conf.port, conf.tcp) + end + -- start publishing stats + if M.ev then event.cancel(M.ev) end + M.ev = event.recurrent(M.interval, M.publish) + return 0 +end + +return M diff --git a/modules/graphite/graphite.mk b/modules/graphite/graphite.mk new file mode 100644 index 0000000..615f8be --- /dev/null +++ b/modules/graphite/graphite.mk @@ -0,0 +1,2 @@ +graphite_SOURCES := graphite.lua +$(call make_lua_module,graphite) diff --git a/modules/hints/README.rst b/modules/hints/README.rst new file mode 100644 index 0000000..a42d19c --- /dev/null +++ b/modules/hints/README.rst @@ -0,0 +1,113 @@ +.. _mod-hints: + +Static hints +------------ + +This is a module providing static hints for forward records (A/AAAA) and reverse records (PTR). +The records can be loaded from ``/etc/hosts``-like files and/or added directly. + +You can also use the module to change the root hints; they are used as a safety belt or if the root NS +drops out of cache. + +Examples +^^^^^^^^ + +.. code-block:: lua + + -- Load hints after iterator (so hints take precedence before caches) + modules = { 'hints > iterate' } + -- Add a custom hosts file + hints.add_hosts('hosts.custom') + -- Override the root hints + hints.root({ + ['j.root-servers.net.'] = { '2001:503:c27::2:30', '192.58.128.30' } + }) + -- Add a custom hint + hints['foo.bar'] = '127.0.0.1' + +.. note:: The :ref:`policy ` module applies before hints, meaning e.g. that hints for special names (:rfc:`6761#section-6`) like ``localhost`` or ``test`` will get shadowed by policy rules by default. + That can be worked around e.g. by explicit ``policy.PASS`` action. + +Properties +^^^^^^^^^^ + +.. function:: hints.config([path]) + + :param string path: path to hosts-like file, default: no file + :return: ``{ result: bool }`` + + Clear any configured hints, and optionally load a hosts-like file as in ``hints.add_hosts(path)``. + (Root hints are not touched.) + +.. function:: hints.add_hosts([path]) + + :param string path: path to hosts-like file, default: ``/etc/hosts`` + + Add hints from a host-like file. + +.. function:: hints.get(hostname) + + :param string hostname: i.e. ``"localhost"`` + :return: ``{ result: [address1, address2, ...] }`` + + Return list of address record matching given name. + If no hostname is specified, all hints are returned in the table format used by ``hints.root()``. + +.. function:: hints.set(pair) + + :param string pair: ``hostname address`` i.e. ``"localhost 127.0.0.1"`` + :return: ``{ result: bool }`` + + Add a hostname--address pair hint. + + .. note:: + + If multiple addresses have been added for a name (in separate ``hints.set()`` commands), + all are returned in a forward query. + If multiple names have been added to an address, the last one defined is returned + in a corresponding PTR query. + +.. function:: hints.del(pair) + + :param string pair: ``hostname address`` i.e. ``"localhost 127.0.0.1"``, or just ``hostname`` + :return: ``{ result: bool }`` + + Remove a hostname - address pair hint. If address is omitted, all addresses for the given name are deleted. + +.. function:: hints.root_file(path) + + Replace current root hints from a zonefile. If the path is omitted, the compiled-in path is used, i.e. the root hints are reset to the default. + +.. function:: hints.root(root_hints) + + :param table root_hints: new set of root hints i.e. ``{['name'] = 'addr', ...}`` + :return: ``{ ['a.root-servers.net.'] = { '1.2.3.4', '5.6.7.8', ...}, ... }`` + + Replace current root hints and return the current table of root hints. + + .. tip:: If no parameters are passed, it only returns current root hints set without changing anything. + + Example: + + .. code-block:: lua + + > hints.root({ + ['l.root-servers.net.'] = '199.7.83.42', + ['m.root-servers.net.'] = '202.12.27.33' + }) + [l.root-servers.net.] => { + [1] => 199.7.83.42 + } + [m.root-servers.net.] => { + [1] => 202.12.27.33 + } + + .. tip:: A good rule of thumb is to select only a few fastest root hints. The server learns RTT and NS quality over time, and thus tries all servers available. You can help it by preselecting the candidates. + +.. function:: hints.use_nodata(toggle) + + :param bool toggle: true if enabling NODATA synthesis, false if disabling + :return: ``{ result: bool }`` + + If set to true (the default), NODATA will be synthesised for matching hint name, but mismatching type (e.g. AAAA query when only A hint exists). + diff --git a/modules/hints/hints.c b/modules/hints/hints.c new file mode 100644 index 0000000..84e2e99 --- /dev/null +++ b/modules/hints/hints.c @@ -0,0 +1,668 @@ +/* Copyright (C) 2014-2017 CZ.NIC, z.s.p.o. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + */ + +/** + * @file hints.c + * @brief Constructed zone cut from the hosts-like file, see @zonecut.h + * + * The module provides an override for queried address records. + */ + +#include +#include +#include +#include +#include +#include + +#include "daemon/engine.h" +#include "lib/zonecut.h" +#include "lib/module.h" +#include "lib/layer.h" + +/* Defaults */ +#define VERBOSE_MSG(qry, ...) QRVERBOSE(qry, "hint", __VA_ARGS__) +#define ERR_MSG(...) kr_log_error("[ ][hint] " __VA_ARGS__) + +struct hints_data { + struct kr_zonecut hints; + struct kr_zonecut reverse_hints; + bool use_nodata; /**< See hint_use_nodata() description, exposed via lua. */ +}; + +/** Useful for returning from module properties. */ +static char * bool2jsonstr(bool val) +{ + char *result = NULL; + if (-1 == asprintf(&result, "{ \"result\": %s }", val ? "true" : "false")) + result = NULL; + return result; +} + +static int put_answer(knot_pkt_t *pkt, struct kr_query *qry, knot_rrset_t *rr, bool use_nodata) +{ + int ret = 0; + if (!knot_rrset_empty(rr) || use_nodata) { + /* Update packet question */ + if (!knot_dname_is_equal(knot_pkt_qname(pkt), rr->owner)) { + kr_pkt_recycle(pkt); + knot_pkt_put_question(pkt, qry->sname, qry->sclass, qry->stype); + } + if (!knot_rrset_empty(rr)) { + /* Append to packet */ + ret = knot_pkt_put_rotate(pkt, KNOT_COMPR_HINT_QNAME, rr, + qry->reorder, KNOT_PF_FREE); + } else { + /* Return empty answer if name exists, but type doesn't match */ + knot_wire_set_aa(pkt->wire); + } + } else { + ret = kr_error(ENOENT); + } + /* Clear RR if failed */ + if (ret != 0) { + knot_rrset_clear(rr, &pkt->mm); + } + return ret; +} + +static int satisfy_reverse(struct kr_zonecut *hints, knot_pkt_t *pkt, struct kr_query *qry, bool use_nodata) +{ + /* Find a matching name */ + pack_t *addr_set = kr_zonecut_find(hints, qry->sname); + if (!addr_set || addr_set->len == 0) { + return kr_error(ENOENT); + } + knot_dname_t *qname = knot_dname_copy(qry->sname, &pkt->mm); + knot_rrset_t rr; + knot_rrset_init(&rr, qname, KNOT_RRTYPE_PTR, KNOT_CLASS_IN, 0); + + /* Append address records from hints */ + uint8_t *addr = pack_last(*addr_set); + if (addr != NULL) { + size_t len = pack_obj_len(addr); + void *addr_val = pack_obj_val(addr); + knot_rrset_add_rdata(&rr, addr_val, len, &pkt->mm); + } + + return put_answer(pkt, qry, &rr, use_nodata); +} + +static int satisfy_forward(struct kr_zonecut *hints, knot_pkt_t *pkt, struct kr_query *qry, bool use_nodata) +{ + /* Find a matching name */ + pack_t *addr_set = kr_zonecut_find(hints, qry->sname); + if (!addr_set || addr_set->len == 0) { + return kr_error(ENOENT); + } + knot_dname_t *qname = knot_dname_copy(qry->sname, &pkt->mm); + knot_rrset_t rr; + knot_rrset_init(&rr, qname, qry->stype, qry->sclass, 0); + size_t family_len = sizeof(struct in_addr); + if (rr.type == KNOT_RRTYPE_AAAA) { + family_len = sizeof(struct in6_addr); + } + + /* Append address records from hints */ + uint8_t *addr = pack_head(*addr_set); + while (addr != pack_tail(*addr_set)) { + size_t len = pack_obj_len(addr); + void *addr_val = pack_obj_val(addr); + if (len == family_len) { + knot_rrset_add_rdata(&rr, addr_val, len, &pkt->mm); + } + addr = pack_obj_next(addr); + } + + return put_answer(pkt, qry, &rr, use_nodata); +} + +static int query(kr_layer_t *ctx, knot_pkt_t *pkt) +{ + struct kr_query *qry = ctx->req->current_query; + if (!qry || ctx->state & (KR_STATE_FAIL)) { + return ctx->state; + } + + struct kr_module *module = ctx->api->data; + struct hints_data *data = module->data; + if (!data) { /* No valid file. */ + return ctx->state; + } + /* FIXME: putting directly into packet breaks ordering in case the hint + * is applied after a CNAME jump. */ + switch(qry->stype) { + case KNOT_RRTYPE_A: + case KNOT_RRTYPE_AAAA: /* Find forward record hints */ + if (satisfy_forward(&data->hints, pkt, qry, data->use_nodata) != 0) + return ctx->state; + break; + case KNOT_RRTYPE_PTR: /* Find PTR record */ + if (satisfy_reverse(&data->reverse_hints, pkt, qry, data->use_nodata) != 0) + return ctx->state; + break; + default: + return ctx->state; /* Ignore */ + } + + VERBOSE_MSG(qry, "<= answered from hints\n"); + qry->flags.DNSSEC_WANT = false; /* Never authenticated */ + qry->flags.CACHED = true; + qry->flags.NO_MINIMIZE = true; + pkt->parsed = pkt->size; + knot_wire_set_qr(pkt->wire); + return KR_STATE_DONE; +} + +static int parse_addr_str(union inaddr *sa, const char *addr) +{ + int family = strchr(addr, ':') ? AF_INET6 : AF_INET; + memset(sa, 0, sizeof(*sa)); + sa->ip.sa_family = family; + char *addr_bytes = (/*const*/char *)kr_inaddr(&sa->ip); + if (inet_pton(family, addr, addr_bytes) < 1) { + return kr_error(EILSEQ); + } + return 0; +} + +/** @warning _NOT_ thread-safe; returns a pointer to static data! */ +static const knot_dname_t * raw_addr2reverse(const uint8_t *raw_addr, int family) +{ + #define REV_MAXLEN (4*16 + 16 /* the suffix, terminator, etc. */) + char reverse_addr[REV_MAXLEN]; + static knot_dname_t dname[REV_MAXLEN]; + #undef REV_MAXLEN + + if (family == AF_INET) { + snprintf(reverse_addr, sizeof(reverse_addr), + "%d.%d.%d.%d.in-addr.arpa.", + raw_addr[3], raw_addr[2], raw_addr[1], raw_addr[0]); + } else if (family == AF_INET6) { + char *ra_it = reverse_addr; + for (int i = 15; i >= 0; --i) { + ssize_t free_space = reverse_addr + sizeof(reverse_addr) - ra_it; + int written = snprintf(ra_it, free_space, "%x.%x.", + raw_addr[i] & 0x0f, raw_addr[i] >> 4); + if (written >= free_space) { + assert(false); + return NULL; + } + ra_it += written; + } + ssize_t free_space = reverse_addr + sizeof(reverse_addr) - ra_it; + if (snprintf(ra_it, free_space, "ip6.arpa.") >= free_space) { + return NULL; + } + } else { + return NULL; + } + + if (!knot_dname_from_str(dname, reverse_addr, sizeof(dname))) { + return NULL; + } + return dname; +} + +static const knot_dname_t * addr2reverse(const char *addr) +{ + /* Parse address string */ + union inaddr ia; + if (parse_addr_str(&ia, addr) != 0) { + return NULL; + } + return raw_addr2reverse((const /*sign*/uint8_t *)kr_inaddr(&ia.ip), + kr_inaddr_family(&ia.ip)); +} + +static int add_pair(struct kr_zonecut *hints, const char *name, const char *addr) +{ + /* Build key */ + knot_dname_t key[KNOT_DNAME_MAXLEN]; + if (!knot_dname_from_str(key, name, sizeof(key))) { + return kr_error(EINVAL); + } + knot_dname_to_lower(key); + + union inaddr ia; + if (parse_addr_str(&ia, addr) != 0) { + return kr_error(EINVAL); + } + + return kr_zonecut_add(hints, key, kr_inaddr(&ia.ip), kr_inaddr_len(&ia.ip)); +} + +static int add_reverse_pair(struct kr_zonecut *hints, const char *name, const char *addr) +{ + const knot_dname_t *key = addr2reverse(addr); + + if (key == NULL) { + return kr_error(EINVAL); + } + + knot_dname_t ptr_name[KNOT_DNAME_MAXLEN]; + if (!knot_dname_from_str(ptr_name, name, sizeof(ptr_name))) { + return kr_error(EINVAL); + } + + return kr_zonecut_add(hints, key, ptr_name, knot_dname_size(ptr_name)); +} + +/** For a given name, remove either one address or all of them (if == NULL). + * + * Also remove the corresponding reverse records. + */ +static int del_pair(struct hints_data *data, const char *name, const char *addr) +{ + /* Build key */ + knot_dname_t key[KNOT_DNAME_MAXLEN]; + if (!knot_dname_from_str(key, name, sizeof(key))) { + return kr_error(EINVAL); + } + int key_len = knot_dname_size(key); + + if (addr) { + /* Remove the pair. */ + union inaddr ia; + if (parse_addr_str(&ia, addr) != 0) { + return kr_error(EINVAL); + } + + const knot_dname_t *reverse_key = addr2reverse(addr); + kr_zonecut_del(&data->reverse_hints, reverse_key, key, key_len); + return kr_zonecut_del(&data->hints, key, + kr_inaddr(&ia.ip), kr_inaddr_len(&ia.ip)); + } + /* We're removing everything for the name; + * first find the name's pack */ + pack_t *addr_set = kr_zonecut_find(&data->hints, key); + if (!addr_set || addr_set->len == 0) { + return kr_error(ENOENT); + } + + /* Remove address records in hints from reverse_hints. */ + + for (uint8_t *a = pack_head(*addr_set); a != pack_tail(*addr_set); + a = pack_obj_next(a)) { + void *addr_val = pack_obj_val(a); + int family = pack_obj_len(a) == kr_family_len(AF_INET) + ? AF_INET : AF_INET6; + const knot_dname_t *reverse_key = raw_addr2reverse(addr_val, family); + if (reverse_key != NULL) { + kr_zonecut_del(&data->reverse_hints, reverse_key, key, key_len); + } + } + + /* Remove the whole name. */ + return kr_zonecut_del_all(&data->hints, key); +} + +static int load_file(struct kr_module *module, const char *path) +{ + auto_fclose FILE *fp = fopen(path, "r"); + if (fp == NULL) { + ERR_MSG("reading '%s' failed: %s\n", path, strerror(errno)); + return kr_error(errno); + } else { + VERBOSE_MSG(NULL, "reading '%s'\n", path); + } + + /* Load file to map */ + struct hints_data *data = module->data; + size_t line_len = 0; + size_t count = 0; + size_t line_count = 0; + auto_free char *line = NULL; + int ret = kr_ok(); + + while (getline(&line, &line_len, fp) > 0) { + ++line_count; + char *saveptr = NULL; + const char *addr = strtok_r(line, " \t\n", &saveptr); + if (addr == NULL || strchr(addr, '#') || strlen(addr) == 0) { + continue; + } + const char *canonical_name = strtok_r(NULL, " \t\n", &saveptr); + if (canonical_name == NULL) { + ret = -1; + goto error; + } + /* Since the last added PTR records takes preference, + * we add canonical name as the last one. */ + const char *name_tok; + while ((name_tok = strtok_r(NULL, " \t\n", &saveptr)) != NULL) { + ret = add_pair(&data->hints, name_tok, addr); + if (!ret) { + ret = add_reverse_pair(&data->reverse_hints, name_tok, addr); + } + if (ret) { + ret = -1; + goto error; + } + count += 1; + } + ret = add_pair(&data->hints, canonical_name, addr); + if (!ret) { + ret = add_reverse_pair(&data->reverse_hints, canonical_name, addr); + } + if (ret) { + ret = -1; + goto error; + } + count += 1; + } +error: + if (ret) { + ret = kr_error(ret); + ERR_MSG("%s:%zu: invalid syntax\n", path, line_count); + } + VERBOSE_MSG(NULL, "loaded %zu hints\n", count); + return ret; +} + +static char* hint_add_hosts(void *env, struct kr_module *module, const char *args) +{ + if (!args) + args = "/etc/hosts"; + int err = load_file(module, args); + return bool2jsonstr(err == kr_ok()); +} + +/** + * Set name => address hint. + * + * Input: { name, address } + * Output: { result: bool } + * + */ +static char* hint_set(void *env, struct kr_module *module, const char *args) +{ + struct hints_data *data = module->data; + if (!args) + return NULL; + auto_free char *args_copy = strdup(args); + if (!args_copy) + return NULL; + + int ret = -1; + char *addr = strchr(args_copy, ' '); + if (addr) { + *addr = '\0'; + ++addr; + ret = add_reverse_pair(&data->reverse_hints, args_copy, addr); + if (ret) { + del_pair(data, args_copy, addr); + } else { + ret = add_pair(&data->hints, args_copy, addr); + } + } + + return bool2jsonstr(ret == 0); +} + +static char* hint_del(void *env, struct kr_module *module, const char *args) +{ + struct hints_data *data = module->data; + if (!args) + return NULL; + auto_free char *args_copy = strdup(args); + if (!args_copy) + return NULL; + + int ret = -1; + char *addr = strchr(args_copy, ' '); + if (addr) { + *addr = '\0'; + ++addr; + } + ret = del_pair(data, args_copy, addr); + + return bool2jsonstr(ret == 0); +} + +/** @internal Pack address list into JSON array. */ +static JsonNode *pack_addrs(pack_t *pack) +{ + char buf[INET6_ADDRSTRLEN]; + JsonNode *root = json_mkarray(); + uint8_t *addr = pack_head(*pack); + while (addr != pack_tail(*pack)) { + size_t len = pack_obj_len(addr); + int family = len == sizeof(struct in_addr) ? AF_INET : AF_INET6; + if (!inet_ntop(family, pack_obj_val(addr), buf, sizeof(buf))) { + break; + } + json_append_element(root, json_mkstring(buf)); + addr = pack_obj_next(addr); + } + return root; +} + +static char* pack_hints(struct kr_zonecut *hints); +/** + * Retrieve address hints, either for given name or for all names. + * + * Input: name + * Output: NULL or "{ address1, address2, ... }" + */ +static char* hint_get(void *env, struct kr_module *module, const char *args) +{ + struct kr_zonecut *hints = &((struct hints_data *) module->data)->hints; + if (!hints) { + assert(false); + return NULL; + } + + if (!args) { + return pack_hints(hints); + } + + knot_dname_t key[KNOT_DNAME_MAXLEN]; + pack_t *pack = NULL; + if (knot_dname_from_str(key, args, sizeof(key))) { + pack = kr_zonecut_find(hints, key); + } + if (!pack || pack->len == 0) { + return NULL; + } + + char *result = NULL; + JsonNode *root = pack_addrs(pack); + if (root) { + result = json_encode(root); + json_delete(root); + } + return result; +} + +/** @internal Pack all hints into serialized JSON. */ +static char* pack_hints(struct kr_zonecut *hints) { + char *result = NULL; + JsonNode *root_node = json_mkobject(); + trie_it_t *it; + for (it = trie_it_begin(hints->nsset); !trie_it_finished(it); trie_it_next(it)) { + KR_DNAME_GET_STR(nsname_str, (const knot_dname_t *)trie_it_key(it, NULL)); + JsonNode *addr_list = pack_addrs((pack_t *)*trie_it_val(it)); + if (!addr_list) goto error; + json_append_member(root_node, nsname_str, addr_list); + } + result = json_encode(root_node); +error: + trie_it_free(it); + json_delete(root_node); + return result; +} + +static void unpack_hint(struct kr_zonecut *root_hints, JsonNode *table, const char *name) +{ + JsonNode *node = NULL; + json_foreach(node, table) { + switch(node->tag) { + case JSON_STRING: add_pair(root_hints, name ? name : node->key, node->string_); break; + case JSON_ARRAY: unpack_hint(root_hints, node, name ? name : node->key); break; + default: continue; + } + } +} + +/** + * Get/set root hints set. + * + * Input: { name: [addr_list], ... } + * Output: current list + * + */ +static char* hint_root(void *env, struct kr_module *module, const char *args) +{ + struct engine *engine = env; + struct kr_context *ctx = &engine->resolver; + struct kr_zonecut *root_hints = &ctx->root_hints; + /* Replace root hints if parameter is set */ + if (args && args[0] != '\0') { + JsonNode *root_node = json_decode(args); + kr_zonecut_set(root_hints, (const uint8_t *)""); + unpack_hint(root_hints, root_node, NULL); + json_delete(root_node); + } + /* Return current root hints */ + return pack_hints(root_hints); +} + +static char* hint_root_file(void *env, struct kr_module *module, const char *args) +{ + struct engine *engine = env; + struct kr_context *ctx = &engine->resolver; + const char *err_msg = engine_hint_root_file(ctx, args); + if (err_msg) { + luaL_error(engine->L, "error when opening '%s': %s", args, err_msg); + } + return strdup(err_msg ? err_msg : ""); +} + +static char* hint_use_nodata(void *env, struct kr_module *module, const char *args) +{ + struct hints_data *data = module->data; + if (!args) { + return NULL; + } + + JsonNode *root_node = json_decode(args); + if (!root_node || root_node->tag != JSON_BOOL) { + json_delete(root_node); + return bool2jsonstr(false); + } + + data->use_nodata = root_node->bool_; + json_delete(root_node); + return bool2jsonstr(true); +} + +/* + * Module implementation. + */ + +KR_EXPORT +const kr_layer_api_t *hints_layer(struct kr_module *module) +{ + static kr_layer_api_t _layer = { + .produce = &query, + }; + /* Store module reference */ + _layer.data = module; + return &_layer; +} + + +/** Basic initialization: get a memory pool, etc. */ +KR_EXPORT +int hints_init(struct kr_module *module) +{ + /* Create pool and copy itself */ + knot_mm_t _pool = { + .ctx = mp_new(4096), + .alloc = (knot_mm_alloc_t) mp_alloc + }; + knot_mm_t *pool = mm_alloc(&_pool, sizeof(*pool)); + if (!pool) { + return kr_error(ENOMEM); + } + memcpy(pool, &_pool, sizeof(*pool)); + + struct hints_data *data = mm_alloc(pool, sizeof(struct hints_data)); + if (!data) { + mp_delete(pool->ctx); + return kr_error(ENOMEM); + } + kr_zonecut_init(&data->hints, (const uint8_t *)(""), pool); + kr_zonecut_init(&data->reverse_hints, (const uint8_t *)(""), pool); + data->use_nodata = true; + module->data = data; + + return kr_ok(); +} + +/** Release all resources. */ +KR_EXPORT +int hints_deinit(struct kr_module *module) +{ + struct hints_data *data = module->data; + if (data) { + kr_zonecut_deinit(&data->hints); + kr_zonecut_deinit(&data->reverse_hints); + mp_delete(data->hints.pool->ctx); + module->data = NULL; + } + return kr_ok(); +} + +/** Drop all hints, and load a hosts file if any was specified. + * + * It seems slightly strange to drop all, but keep doing that for now. + */ +KR_EXPORT +int hints_config(struct kr_module *module, const char *conf) +{ + hints_deinit(module); + int err = hints_init(module); + if (err != kr_ok()) { + return err; + } + + if (conf && conf[0]) { + return load_file(module, conf); + } + return kr_ok(); +} + +KR_EXPORT +struct kr_prop *hints_props(void) +{ + static struct kr_prop prop_list[] = { + { &hint_set, "set", "Set {name, address} hint.", }, + { &hint_del, "del", "Delete one {name, address} hint or all addresses for the name.", }, + { &hint_get, "get", "Retrieve hint for given name.", }, + { &hint_add_hosts, "add_hosts", "Load a file with hosts-like formatting and add contents into hints.", }, + { &hint_root, "root", "Replace root hints set (empty value to return current list).", }, + { &hint_root_file, "root_file", "Replace root hints set from a zonefile.", }, + { &hint_use_nodata, "use_nodata", "Synthesise NODATA if name matches, but type doesn't. True by default.", }, + { NULL, NULL, NULL } + }; + return prop_list; +} + +KR_MODULE_EXPORT(hints) + +#undef VERBOSE_MSG diff --git a/modules/hints/hints.mk b/modules/hints/hints.mk new file mode 100644 index 0000000..7613c18 --- /dev/null +++ b/modules/hints/hints.mk @@ -0,0 +1,8 @@ +hints_CFLAGS := -fPIC +# We use a symbol that's not in libkres but the daemon. +# On darwin this isn't accepted by default. +hints_LDFLAGS := -Wl,-undefined -Wl,dynamic_lookup +hints_SOURCES := modules/hints/hints.c +hints_DEPEND := $(libkres) +hints_LIBS := $(contrib_TARGET) $(libkres_TARGET) $(libkres_LIBS) +$(call make_c_module,hints) diff --git a/modules/hints/tests/hints.test.lua b/modules/hints/tests/hints.test.lua new file mode 100644 index 0000000..b60d2a3 --- /dev/null +++ b/modules/hints/tests/hints.test.lua @@ -0,0 +1,36 @@ +local utils = require('test_utils') + +-- setup resolver +modules = { 'hints' } + +-- test for default configuration +local function test_default() + -- get loaded root hints and change names to lowercase + local hints_data = utils.table_keys_to_lower(hints.root()) + + -- root hints loaded from default location + -- check correct ip address of a.root-server.net + utils.contains(hints_data['a.root-servers.net.'], '198.41.0.4', 'has IP address for a.root-servers.net.') +end + +-- test loading from config file +local function test_custom() + -- load custom root hints file with fake ip address for a.root-server.net + local err_msg = hints.root_file(TEST_DIR .. 'hints_test.zone') + same(err_msg, '', 'load root hints from file') + + -- get loaded root hints and change names to lowercase + local hints_data = utils.table_keys_to_lower(hints.root()) + isnt(hints_data['a.root-servers.net.'], nil, 'can retrieve root hints') + + -- check loaded ip address of a.root-server.net + utils.not_contains(hints_data['a.root-servers.net.'], '198.41.0.4', + 'real IP address for a.root-servers.net. is replaced') + utils.contains(hints_data['a.root-servers.net.'], '10.0.0.1', + 'real IP address for a.root-servers.net. is correct') +end + +return { + test_default, + test_custom +} diff --git a/modules/hints/tests/hints_test.zone b/modules/hints/tests/hints_test.zone new file mode 100644 index 0000000..f38ee77 --- /dev/null +++ b/modules/hints/tests/hints_test.zone @@ -0,0 +1 @@ +A.ROOT-SERVERS.NET. 3600000 A 10.0.0.1 \ No newline at end of file diff --git a/modules/http/README.rst b/modules/http/README.rst new file mode 100644 index 0000000..b4b9194 --- /dev/null +++ b/modules/http/README.rst @@ -0,0 +1,345 @@ +.. _mod-http: + +HTTP/2 services +--------------- + +This is a module that does the heavy lifting to provide an HTTP/2 enabled +server that provides endpoint for other modules +in order to enable them to export restful APIs and websocket streams. +One example is statistics module that can stream live metrics on the website, +or publish metrics on request for Prometheus scraper. + +The server allows other modules to either use default endpoint that provides +built-in webpage, restful APIs and websocket streams, or create new endpoints. + +By default the server provides plain HTTP and TLS on the same port. See below +if you want to use only one of these. + +.. warning:: This module provides access to various API endpoints + and must not be directly exposed to untrusted parties. + Use `reverse-proxy`_ like Apache_ or Nginx_ if you need to + authenticate API clients. + +Example configuration +^^^^^^^^^^^^^^^^^^^^^ + +By default, the web interface starts HTTPS/2 on port 8053 using an ephemeral +certificate that is valid for 90 days and is automatically renewed. It is of +course self-signed. Why not use something like +`Let's Encrypt `_? + +.. code-block:: lua + + -- Load HTTP module with defaults + modules = { + http = { + host = 'localhost', -- Default: 'localhost' + port = 8053, -- Default: 8053 + geoip = 'GeoLite2-City.mmdb' -- Optional, see + -- e.g. https://dev.maxmind.com/geoip/geoip2/geolite2/ + -- and install mmdblua library + endpoints = {}, + } + } + +Now you can reach the web services and APIs, done! + +.. code-block:: bash + + $ curl -k https://localhost:8053 + $ curl -k https://localhost:8053/stats + + +Configuring TLS +^^^^^^^^^^^^^^^ +You can disable unecrypted HTTP and enforce HTTPS by passing +``tls = true`` option. + +.. code-block:: lua + + http = { + tls = true, + } + +If you want to provide your own certificate and key, you're welcome to do so: + +.. code-block:: lua + + http = { + cert = 'mycert.crt', + key = 'mykey.key', + } + +The format of both certificate and key is expected to be PEM, e.g. equivalent to +the outputs of following: + +.. code-block:: bash + + openssl ecparam -genkey -name prime256v1 -out mykey.key + openssl req -new -key mykey.key -out csr.pem + openssl req -x509 -days 90 -key mykey.key -in csr.pem -out mycert.crt + +It is also possible to disable HTTPS altogether by passing ``tls = false`` option. +Plain HTTP gets handy if you want to use `reverse-proxy`_ like Apache_ or Nginx_ +for authentication to API etc. +(Unencrypted HTTP could be fine for localhost tests as, for example, +Safari doesn't allow WebSockets over HTTPS with a self-signed certificate. +Major drawback is that current browsers won't do HTTP/2 over insecure connection.) + + +Built-in services +^^^^^^^^^^^^^^^^^ + +The HTTP module has several built-in services to use. + +.. csv-table:: + :header: "Endpoint", "Service", "Description" + + "``/stats``", "Statistics/metrics", "Exported metrics in JSON." + "``/metrics``", "Prometheus metrics", "Exported metrics for Prometheus_" + "``/trace/:name/:type``", "Tracking", "Trace resolution of the query and return the verbose logs." + +Enabling Prometheus metrics endpoint +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +The module exposes ``/metrics`` endpoint that serves internal metrics in Prometheus_ text format. +You can use it out of the box: + +.. code-block:: bash + + $ curl -k https://localhost:8053/metrics | tail + # TYPE latency histogram + latency_bucket{le=10} 2.000000 + latency_bucket{le=50} 2.000000 + latency_bucket{le=100} 2.000000 + latency_bucket{le=250} 2.000000 + latency_bucket{le=500} 2.000000 + latency_bucket{le=1000} 2.000000 + latency_bucket{le=1500} 2.000000 + latency_bucket{le=+Inf} 2.000000 + latency_count 2.000000 + latency_sum 11.000000 + +You can namespace the metrics in configuration, using `http.prometheus.namespace` attribute: + +.. code-block:: lua + + http = { + host = 'localhost', + } + + -- Set Prometheus namespace + http.prometheus.namespace = 'resolver_' + +You can also add custom metrics or rewrite existing metrics before they are returned to Prometheus client. + +.. code-block:: lua + + http = { + host = 'localhost', + } + + -- Add an arbitrary metric to Prometheus + http.prometheus.finalize = function (metrics) + table.insert(metrics, 'build_info{version="1.2.3"} 1') + end + +Tracing requests +^^^^^^^^^^^^^^^^ + +With the ``/trace`` endpoint you can trace various aspects of the request execution. +The basic mode allows you to resolve a query and trace verbose logs (and messages received): + +.. code-block:: bash + + $ curl https://localhost:8053/trace/e.root-servers.net + [ 8138] [iter] 'e.root-servers.net.' type 'A' created outbound query, parent id 0 + [ 8138] [ rc ] => rank: 020, lowest 020, e.root-servers.net. A + [ 8138] [ rc ] => satisfied from cache + [ 8138] [iter] <= answer received: + ;; ->>HEADER<<- opcode: QUERY; status: NOERROR; id: 8138 + ;; Flags: qr aa QUERY: 1; ANSWER: 0; AUTHORITY: 0; ADDITIONAL: 0 + + ;; QUESTION SECTION + e.root-servers.net. A + + ;; ANSWER SECTION + e.root-servers.net. 3556353 A 192.203.230.10 + + [ 8138] [iter] <= rcode: NOERROR + [ 8138] [resl] finished: 4, queries: 1, mempool: 81952 B + +How to expose services over HTTP +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +The module provides a table ``endpoints`` of already existing endpoints, it is free for reading and +writing. It contains tables describing a triplet - ``{mime, on_serve, on_websocket}``. +In order to register a new service, simply add it to the table: + +.. code-block:: lua + + local on_health = {'application/json', + function (h, stream) + -- API call, return a JSON table + return {state = 'up', uptime = 0} + end, + function (h, ws) + -- Stream current status every second + local ok = true + while ok do + local push = tojson('up') + ok = ws:send(tojson({'up'})) + require('cqueues').sleep(1) + end + -- Finalize the WebSocket + ws:close() + end} + -- Load module + modules = { + http = { + endpoints = { ['/health'] = on_health } + } + } + +Then you can query the API endpoint, or tail the WebSocket using curl. + +.. code-block:: bash + + $ curl -k https://localhost:8053/health + {"state":"up","uptime":0} + $ curl -k -i -N -H "Connection: Upgrade" -H "Upgrade: websocket" -H "Host: localhost:8053/health" -H "Sec-Websocket-Key: nope" -H "Sec-Websocket-Version: 13" https://localhost:8053/health + HTTP/1.1 101 Switching Protocols + upgrade: websocket + sec-websocket-accept: eg18mwU7CDRGUF1Q+EJwPM335eM= + connection: upgrade + + ?["up"]?["up"]?["up"] + +Since the stream handlers are effectively coroutines, you are free to keep state and yield using cqueues. +This is especially useful for WebSockets, as you can stream content in a simple loop instead of +chains of callbacks. + +Last thing you can publish from modules are *"snippets"*. Snippets are plain pieces of HTML code that are rendered at the end of the built-in webpage. The snippets can be extended with JS code to talk to already +exported restful APIs and subscribe to WebSockets. + +.. code-block:: lua + + http.snippets['/health'] = {'Health service', '

UP!

'} + +How to expose RESTful services +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +A RESTful service is likely to respond differently to different type of methods and requests, +there are three things that you can do in a service handler to send back results. +First is to just send whatever you want to send back, it has to respect MIME type that the service +declared in the endpoint definition. The response code would then be ``200 OK``, any non-string +responses will be packed to JSON. Alternatively, you can respond with a number corresponding to +the HTTP response code or send headers and body yourself. + +.. code-block:: lua + + -- Our upvalue + local value = 42 + + -- Expose the service + local service = {'application/json', + function (h, stream) + -- Get request method and deal with it properly + local m = h:get(':method') + local path = h:get(':path') + log('[service] method %s path %s', m, path) + -- Return table, response code will be '200 OK' + if m == 'GET' then + return {key = path, value = value} + -- Save body, perform check and either respond with 505 or 200 OK + elseif m == 'POST' then + local data = stream:get_body_as_string() + if not tonumber(data) then + return 500, 'Not a good request' + end + value = tonumber(data) + -- Unsupported method, return 405 Method not allowed + else + return 405, 'Cannot do that' + end + end} + -- Load the module + modules = { + http = { + endpoints = { ['/service'] = service } + } + } + +In some cases you might need to send back your own headers instead of default provided by HTTP handler, +you can do this, but then you have to return ``false`` to notify handler that it shouldn't try to generate +a response. + +.. code-block:: lua + + local headers = require('http.headers') + function (h, stream) + -- Send back headers + local hsend = headers.new() + hsend:append(':status', '200') + hsend:append('content-type', 'binary/octet-stream') + assert(stream:write_headers(hsend, false)) + -- Send back data + local data = 'binary-data' + assert(stream:write_chunk(data, true)) + -- Disable default handler action + return false + end + +How to expose more interfaces +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Services exposed in the previous part share the same external interface. This means that it's either accessible to the outside world or internally, but not one or another. This is not always desired, i.e. you might want to offer DNS/HTTPS to everyone, but allow application firewall configuration only on localhost. ``http`` module allows you to create additional interfaces with custom endpoints for this purpose. + +.. code-block:: lua + + http.add_interface { + endpoints = { + ['/conf'] = { + 'application/json', function (h, stream) + return 'configuration API\n' + end + }, + }, + -- Same options as the config() method + host = 'localhost', + port = '8054', + } + +This way you can have different internal-facing and external-facing services at the same time. + +Dependencies +^^^^^^^^^^^^ + +* `lua-http `_ (>= 0.1) available in LuaRocks + + If you're installing via Homebrew on OS X, you need OpenSSL too. + + .. code-block:: bash + + $ brew update + $ brew install openssl + $ brew link openssl --force # Override system OpenSSL + + Any other system can install from LuaRocks directly: + + .. code-block:: bash + + $ luarocks install http + +* `mmdblua `_ available in LuaRocks + + .. code-block:: bash + + $ luarocks install --server=https://luarocks.org/dev mmdblua + $ curl -O https://geolite.maxmind.com/download/geoip/database/GeoLite2-City.mmdb.gz + $ gzip -d GeoLite2-City.mmdb.gz + +.. _Prometheus: https://prometheus.io +.. _reverse-proxy: https://en.wikipedia.org/wiki/Reverse_proxy +.. _Apache: https://httpd.apache.org/docs/2.4/howto/reverse_proxy.html +.. _Nginx: https://docs.nginx.com/nginx/admin-guide/web-server/reverse-proxy/ diff --git a/modules/http/http.lua b/modules/http/http.lua new file mode 100644 index 0000000..f61102a --- /dev/null +++ b/modules/http/http.lua @@ -0,0 +1,414 @@ +-- Load dependent modules +if not stats then modules.load('stats') end +if not bogus_log then modules.load('bogus_log') end + +-- This is a module that does the heavy lifting to provide an HTTP/2 enabled +-- server that supports TLS by default and provides endpoint for other modules +-- in order to enable them to export restful APIs and websocket streams. +-- One example is statistics module that can stream live metrics on the website, +-- or publish metrics on request for Prometheus scraper. +local http_server = require('http.server') +local http_headers = require('http.headers') +local http_websocket = require('http.websocket') +local http_util = require "http.util" +local x509, pkey = require('openssl.x509'), require('openssl.pkey') +local has_mmdb, mmdb = pcall(require, 'mmdb') + +-- Module declaration +local M = { + servers = {}, +} + +-- Map extensions to MIME type +local mime_types = { + js = 'application/javascript', + css = 'text/css', + tpl = 'text/html', + ico = 'image/x-icon' +} + +-- Preload static contents, nothing on runtime will touch the disk +local function pgload(relpath, modname) + if not modname then modname = 'http' end + local mdir = moduledir() + local fp, err = io.open(string.format('%s/%s/%s', mdir, modname, relpath), 'r') + if not fp then + fp, err = io.open(string.format('%s/%s/static/%s', mdir, modname, relpath), 'r') + end + if not fp then error(err) end + local data = fp:read('*all') + fp:close() + -- Guess content type + local ext = relpath:match('[^\\.]+$') + return {mime_types[ext] or 'text', data, nil, 86400} +end +M.page = pgload + +-- Preloaded static assets +local pages = { + 'favicon.ico', + 'kresd.js', + 'kresd.css', + 'jquery.js', + 'd3.js', + 'topojson.js', + 'datamaps.world.min.js', + 'dygraph-combined.js', + 'selectize.min.js', + 'selectize.min.css', + 'selectize.bootstrap3.min.css', + 'bootstrap.min.js', + 'bootstrap.min.css', + 'bootstrap-theme.min.css', + 'glyphicons-halflings-regular.woff2', +} + +-- Serve preloaded root page +local function serve_root() + local data = pgload('main.tpl')[2] + data = data + :gsub('{{ title }}', M.title or ('kresd @ ' .. hostname())) + :gsub('{{ host }}', hostname()) + return function (_, stream) + -- Render snippets + local rsnippets = {} + for _,v in pairs(M.snippets) do + local sid = string.lower(string.gsub(v[1], ' ', '-')) + table.insert(rsnippets, string.format('

%s

\n%s
', sid, v[1], v[2])) + end + -- Return index page + return data + :gsub('{{ secure }}', stream:checktls() and 'true' or 'false') + :gsub('{{ snippets }}', table.concat(rsnippets, '\n')) + end +end + +-- Export HTTP service endpoints +M.endpoints = { + ['/'] = {'text/html', serve_root()}, +} + +-- Export static pages +for _, pg in ipairs(pages) do + M.endpoints['/'..pg] = pgload(pg) +end + +-- Export built-in prometheus interface +local prometheus = require('prometheus') +for k, v in pairs(prometheus.endpoints) do + M.endpoints[k] = v +end +M.prometheus = prometheus + +-- Export built-in trace interface +local http_trace = require('http_trace') +for k, v in pairs(http_trace.endpoints) do + M.endpoints[k] = v +end +M.trace = http_trace + +-- Export HTTP service page snippets +M.snippets = {} + +-- Serve known requests, for methods other than GET +-- the endpoint must be a closure and not a preloaded string +local function serve(endpoints, h, stream) + local hsend = http_headers.new() + local path = h:get(':path') + local entry = endpoints[path] + if not entry then -- Accept top-level path match + entry = endpoints[path:match '^/[^/?]*'] + end + -- Unpack MIME and data + local data, mime, ttl, err + if entry then + mime = entry[1] + data = entry[2] + ttl = entry[4] + end + -- Get string data out of service endpoint + if type(data) == 'function' then + local set_mime, set_ttl + data, err, set_mime, set_ttl = data(h, stream) + -- Override default endpoint mime/TTL + if set_mime then mime = set_mime end + if set_ttl then ttl = set_ttl end + -- Handler doesn't provide any data + if data == false then return end + if type(data) == 'number' then return tostring(data), err end + -- Methods other than GET require handler to be closure + elseif h:get(':method') ~= 'GET' then + return '501', '' + end + if type(data) == 'table' then data = tojson(data) end + if not mime or type(data) ~= 'string' then + return '404', '' + else + -- Serve content type appropriately + hsend:append(':status', '200') + hsend:append('content-type', mime) + hsend:append('content-length', tostring(#data)) + if ttl then + hsend:append('cache-control', string.format('max-age=%d', ttl)) + end + assert(stream:write_headers(hsend, false)) + assert(stream:write_chunk(data, true)) + end +end + +-- Web server service closure +local function route(endpoints) + return function (_, stream) + -- HTTP/2: We're only permitted to send in open/half-closed (remote) + local connection = stream.connection + if connection.version >= 2 then + if stream.state ~= 'open' and stream.state ~= 'half closed (remote)' then + return + end + end + -- Start reading headers + local h = assert(stream:get_headers()) + local m = h:get(':method') + local path = h:get(':path') + -- Upgrade connection to WebSocket + local ws = http_websocket.new_from_stream(stream, h) + if ws then + assert(ws:accept { protocols = {'json'} }) + -- Continue streaming results to client + local ep = endpoints[path] + local cb = ep[3] + if cb then + cb(h, ws) + end + ws:close() + return + else + local ok, err, reason = http_util.yieldable_pcall(serve, endpoints, h, stream) + if not ok or err then + if err ~= '404' and verbose() then + log('[http] %s %s: %s (%s)', m, path, err or '500', reason) + end + -- Method is not supported + local hsend = http_headers.new() + hsend:append(':status', err or '500') + if reason then + assert(stream:write_headers(hsend, false)) + assert(stream:write_chunk(reason, true)) + else + assert(stream:write_headers(hsend, true)) + end + end + end + end +end + +-- @function Create self-signed certificate +local function ephemeralcert(host) + -- Import luaossl directly + local name = require('openssl.x509.name') + local altname = require('openssl.x509.altname') + local openssl_bignum = require('openssl.bignum') + local openssl_rand = require('openssl.rand') + -- Create self-signed certificate + host = host or hostname() + local crt = x509.new() + local now = os.time() + crt:setVersion(3) + -- serial needs to be unique or browsers will show uninformative error messages + crt:setSerial(openssl_bignum.fromBinary(openssl_rand.bytes(16))) + -- use the host we're listening on as canonical name + local dn = name.new() + dn:add("CN", host) + crt:setSubject(dn) + crt:setIssuer(dn) -- should match subject for a self-signed + local alt = altname.new() + alt:add("DNS", host) + crt:setSubjectAlt(alt) + -- Valid for 90 days + crt:setLifetime(now, now + 90*60*60*24) + -- Can't be used as a CA + crt:setBasicConstraints{CA=false} + crt:setBasicConstraintsCritical(true) + -- Create and set key (default: EC/P-256 as a most "interoperable") + local key = pkey.new {type = 'EC', curve = 'prime256v1'} + crt:setPublicKey(key) + crt:sign(key) + return crt, key +end + +-- @function Prefer HTTP/2 or HTTP/1.1 +local function alpnselect(_, protos) + for _, proto in ipairs(protos) do + if proto == 'h2' or proto == 'http/1.1' then + return proto + end + end + return nil +end + +-- @function Create TLS context +local function tlscontext(crt, key) + local http_tls = require('http.tls') + local ctx = http_tls.new_server_context() + if ctx.setAlpnSelect then + ctx:setAlpnSelect(alpnselect) + end + assert(ctx:setPrivateKey(key)) + assert(ctx:setCertificate(crt)) + return ctx +end + +-- @function Refresh self-signed certificates +local function updatecert(crtfile, keyfile) + local f = assert(io.open(crtfile, 'w'), string.format('cannot open "%s" for writing', crtfile)) + local crt, key = ephemeralcert() + -- Write back to file + f:write(tostring(crt)) + f:close() + f = assert(io.open(keyfile, 'w'), string.format('cannot open "%s" for writing', keyfile)) + local pub, priv = key:toPEM('public', 'private') + assert(f:write(pub..priv)) + f:close() + return crt, key +end + +-- @function Listen on given HTTP(s) host +function M.add_interface(conf) + local crt, key, ephemeral + if conf.tls ~= false then + -- Check if a cert file was specified + if not conf.cert then + conf.cert = 'self.crt' + conf.key = 'self.key' + ephemeral = true + elseif not conf.key then + error('certificate provided, but missing key') + end + -- Read or create self-signed x509 certificate + local f = io.open(conf.cert, 'r') + if f then + crt = assert(x509.new(f:read('*all'))) + f:close() + -- Continue reading key file + if crt then + f = io.open(conf.key, 'r') + key = assert(pkey.new(f:read('*all'))) + f:close() + end + elseif ephemeral then + crt, key = updatecert(conf.cert, conf.key) + end + -- Check loaded certificate + if not crt or not key then + panic('failed to load certificate "%s"', conf.cert) + end + end + -- Compose server handler + local routes = route(conf.endpoints or M.endpoints) + -- Enable SO_REUSEPORT by default (unless explicitly turned off) + local reuseport = (conf.reuseport ~= nil) and conf.reuseport or true + if not reuseport and worker.id > 0 then + warn('[http] the "reuseport" option is disabled and multiple forks are used, ' .. + 'port binding will fail on some instances') + end + -- Check if UNIX socket path is used + local addr_str + if not conf.path then + conf.host = conf.host or 'localhost' + conf.port = conf.port or 8053 + addr_str = string.format('%s@%d', conf.host, conf.port) + else + if conf.host or conf.port then + error('either "path", or "host" and "port" must be provided') + end + addr_str = conf.path + end + -- Create TLS context and start listening + local s, err = http_server.listen { + cq = worker.bg_worker.cq, + host = conf.host, + port = conf.port, + path = conf.path, + v6only = conf.v6only, + unlink = conf.unlink, + reuseaddr = conf.reuseaddr, + reuseport = reuseport, + client_timeout = conf.client_timeout or 5, + ctx = crt and tlscontext(crt, key), + tls = conf.tls, + onstream = routes, + -- Log errors, but do not throw + onerror = function(myserver, context, op, err, errno) -- luacheck: ignore 212 + local msg = '[http] ' .. op .. ' on ' .. tostring(context) .. ' failed' + if err then + msg = msg .. ': ' .. tostring(err) + end + if verbose() then + log(msg) + end + end, + } + -- Manually call :listen() so that we are bound before calling :localname() + if s then + err = select(2, s:listen()) + end + if err then + panic('failed to listen on %s: %s', addr_str, err) + end + table.insert(M.servers, s) + -- Create certificate renewal timer if ephemeral + if crt and ephemeral then + local _, expiry = crt:getLifetime() + expiry = math.max(0, expiry - (os.time() - 3 * 24 * 3600)) + event.after(expiry, function () + log('[http] refreshed ephemeral certificate') + crt, key = updatecert(conf.cert, conf.key) + s.ctx = tlscontext(crt, key) + end) + end +end + +-- @function Listen on given HTTP(s) host (backwards compatible interface) +function M.interface(host, port, endpoints, crtfile, keyfile) + return M.add_interface { + host = host, + port = port, + endpoints = endpoints, + cert = crtfile, + key = keyfile, + } +end + +-- @function Init module +function M.init() + -- collect and merge metrics only on leader + if worker.id == 0 then + worker.coroutine(prometheus.init) + end +end + +-- @function Cleanup module +function M.deinit() + for i, server in ipairs(M.servers) do + server:close() + M.servers[i] = nil + end + prometheus.deinit() +end + +-- @function Configure module +function M.config(conf) + if conf == true then conf = {} end + assert(type(conf) == 'table', 'config { host = "...", port = 443, cert = "...", key = "..." }') + -- Configure web interface for resolver + if conf.geoip then + if has_mmdb then + M.geoip = mmdb.open(conf.geoip) + else + error('[http] mmdblua library not found, please remove GeoIP configuration') + end + end + M.add_interface(conf) +end + +return M diff --git a/modules/http/http.mk b/modules/http/http.mk new file mode 100644 index 0000000..9ce4f0d --- /dev/null +++ b/modules/http/http.mk @@ -0,0 +1,3 @@ +http_SOURCES := http.lua prometheus.lua http_trace.lua +http_INSTALL := $(wildcard modules/http/static/*) +$(call make_lua_module,http) diff --git a/modules/http/http.test.lua b/modules/http/http.test.lua new file mode 100644 index 0000000..3d0ac14 --- /dev/null +++ b/modules/http/http.test.lua @@ -0,0 +1,89 @@ +-- check prerequisites +local has_http = pcall(require, 'http') and pcall(require, 'http.request') +if not has_http then + pass('skipping http module test because its not installed') + done() +else + local request = require('http.request') + local endpoints = require('http').endpoints + + -- custom endpoints + endpoints['/test'] = {'text/custom', function () return 'hello' end} + + -- setup resolver + modules = { + http = { + port = 0, -- Select random port + cert = false, + endpoints = endpoints, + } + } + + local server = http.servers[1] + ok(server ~= nil, 'creates server instance') + local _, host, port = server:localname() + ok(host and port, 'binds to an interface') + + -- helper for returning useful values to test on + local function http_get(uri) + local headers, stream = assert(request.new_from_uri(uri .. '/'):go()) + local body = assert(stream:get_body_as_string()) + return tonumber(headers:get(':status')), body, headers:get('content-type') + end + + -- test whether http interface responds and binds + local function test_builtin_pages() + local code, body, mime + local uri = string.format('http://%s:%d', host, port) + -- simple static page + code, body, mime = http_get(uri .. '/') + same(code, 200, 'static page return 200 OK') + ok(#body > 0, 'static page has non-empty body') + same(mime, 'text/html', 'static page has text/html content type') + -- custom endpoint + code, body, mime = http_get(uri .. '/test') + same(code, 200, 'custom page return 200 OK') + same(body, 'hello', 'custom page has non-empty body') + same(mime, 'text/custom', 'custom page has custom content type') + -- non-existent page + code = http_get(uri .. '/badpage') + same(code, 404, 'non-existent page returns 404') + -- /stats endpoint serves metrics + code, body, mime = http_get(uri .. '/stats') + same(code, 200, '/stats page return 200 OK') + ok(#body > 0, '/stats page has non-empty body') + same(mime, 'application/json', '/stats page has correct content type') + -- /metrics serves metrics + code, body, mime = http_get(uri .. '/metrics') + same(code, 200, '/metrics page return 200 OK') + ok(#body > 0, '/metrics page has non-empty body') + same(mime, 'text/plain; version=0.0.4', '/metrics page has correct content type') + -- /metrics serves frequent + code, body, mime = http_get(uri .. '/frequent') + same(code, 200, '/frequent page return 200 OK') + ok(#body > 0, '/frequent page has non-empty body') + same(mime, 'application/json', '/frequent page has correct content type') + -- /metrics serves bogus + code, body, mime = http_get(uri .. '/bogus') + same(code, 200, '/bogus page return 200 OK') + ok(#body > 0, '/bogus page has non-empty body') + same(mime, 'application/json', '/bogus page has correct content type') + -- /trace serves trace log for requests + code, body, mime = http_get(uri .. '/trace/localhost/A') + same(code, 200, '/trace page return 200 OK') + ok(#body > 0, '/trace page has non-empty body') + same(mime, 'text/plain', '/trace page has correct content type') + -- /trace checks variables + code = http_get(uri .. '/trace/localhost/BADTYPE') + same(code, 400, '/trace checks type') + code = http_get(uri .. '/trace/') + same(code, 400, '/trace requires name') + end + + -- plan tests + local tests = { + test_builtin_pages, + } + + return tests +end diff --git a/modules/http/http_trace.lua b/modules/http/http_trace.lua new file mode 100644 index 0000000..9e4d466 --- /dev/null +++ b/modules/http/http_trace.lua @@ -0,0 +1,109 @@ +local ffi = require('ffi') +local bit = require('bit') +local condition = require('cqueues.condition') + +-- Buffer selected record information to a table +local function add_selected_records(dst, records) + for _, rec in ipairs(records) do + local rank = rec.rank + -- Separate the referral chain verified flag + local verified = bit.band(rec.rank, kres.rank.AUTH) + if verified then + rank = bit.band(rank, bit.bnot(kres.rank.AUTH)) + end + local rank_name = kres.tostring.rank[rank] or tostring(rank) + -- Write out each individual RR + for rr in tostring(rec.rr):gmatch('[^\n]+\n?') do + local row = string.format('cached: %s, rank: %s, record: %s', + rec.cached, rank_name:lower(), rr) + table.insert(dst, row) + end + end +end + +local function format_selected_records(header, records) + if #records == 0 then return '' end + return string.format('%s\n%s\n', header, string.rep('-', #header)) + .. table.concat(records, '') .. '\n' +end + +-- Trace execution of DNS queries +local function serve_trace(h, _) + local path = h:get(':path') + local qname, qtype_str = path:match('/trace/([^/]+)/?([^/]*)') + if not qname then + return 400, 'expected /trace//' + end + + -- Parse query type (or default to A) + if not qtype_str or #qtype_str == 0 then + qtype_str = 'A' + end + + local qtype = kres.type[qtype_str] + if not qtype then + return 400, string.format('unexpected query type: %s', qtype_str) + end + + -- Create logging handler callback + local buffer = {} + local buffer_log_cb = ffi.cast('trace_log_f', function (query, source, msg) + local message = string.format('[%5s] [%s] %s', + query.id, ffi.string(source), ffi.string(msg)) + table.insert(buffer, message) + end) + + -- Wait for the result of the query + -- Note: We can't do non-blocking write to stream directly from resolve callbacks + -- because they don't run inside cqueue. + local answers, authority = {}, {} + local cond = condition.new() + local waiting, done = false, false + local finish_cb = ffi.cast('trace_callback_f', function (req) + req = kres.request_t(req) + add_selected_records(answers, req.answ_selected) + add_selected_records(authority, req.auth_selected) + if waiting then + cond:signal() + end + done = true + end) + + -- Resolve query and buffer logs into table + resolve { + name = qname, + type = qtype, + options = {'TRACE'}, + init = function (req) + req = kres.request_t(req) + req.trace_log = buffer_log_cb + req.trace_finish = finish_cb + end + } + + -- Wait for asynchronous query and free callbacks + if not done then + waiting = true + cond:wait() + end + + buffer_log_cb:free() + finish_cb:free() + + -- Build the result + local result = table.concat(buffer, '') .. '\n' + .. format_selected_records('Used records from answer:', answers) + .. format_selected_records('Used records from authority:', authority) + -- Return buffered data + if not done then + return 504, result + end + return result +end + +-- Export endpoints +return { + endpoints = { + ['/trace'] = {'text/plain', serve_trace}, + } +} \ No newline at end of file diff --git a/modules/http/prometheus.lua b/modules/http/prometheus.lua new file mode 100644 index 0000000..00d93de --- /dev/null +++ b/modules/http/prometheus.lua @@ -0,0 +1,172 @@ +-- Module implementation +local M = { + namespace = '', + finalize = function (_ --[[metrics]]) end, +} + +local snapshots, snapshots_count = {}, 120 + +-- Gauge metrics +local gauges = { + ['worker.concurrent'] = true, + ['worker.rss'] = true, +} + +local function merge(t, results, prefix) + for _, result in pairs(results) do + if type(result) == 'table' then + for k, v in pairs(result) do + local val = t[prefix..k] + t[prefix..k] = (val or 0) + v + end + end + end +end + +local function getstats() + local t = {} + merge(t, map 'stats.list()', '') + merge(t, map 'cache.stats()', 'cache.') + merge(t, map 'worker.stats()', 'worker.') + return t +end + +local function snapshot_end() + snapshots_count = false +end + +-- Function to sort frequency list +local function snapshot_start() + local prev = getstats() + while snapshots_count do + local is_empty = true + -- Get current snapshot + local cur, stats_dt = getstats(), {} + for k,v in pairs(cur) do + if gauges[k] then + stats_dt[k] = v + else + stats_dt[k] = v - (prev[k] or 0) + end + is_empty = is_empty and stats_dt[k] == 0 + end + prev = cur + -- Calculate upstreams and geotag them if possible + local upstreams + if http.geoip then + upstreams = stats.upstreams() + for k,v in pairs(upstreams) do + local gi + if string.find(k, '.', 1, true) then + gi = http.geoip:search_ipv4(k) + else + gi = http.geoip:search_ipv6(k) + end + if gi then + upstreams[k] = {data=v, location=gi.location, country=gi.country and gi.country.iso_code} + end + end + end + -- Aggregate per-worker metrics + local wdata = {} + for _, info in pairs(map 'worker.info()') do + if type(info) == 'table' then + wdata[tostring(info.pid)] = { + rss = info.rss, + usertime = info.usertime, + systime = info.systime, + pagefaults = info.pagefaults, + queries = info.queries + } + end + end + -- Publish stats updates periodically + if not is_empty then + local update = {time=os.time(), stats=stats_dt, upstreams=upstreams, workers=wdata} + table.insert(snapshots, update) + if #snapshots > snapshots_count then + table.remove(snapshots, 1) + end + end + worker.sleep(1) + end +end + +-- Function to sort frequency list +local function stream_stats(_, ws) + -- Initially, stream history + local ok, last = true, nil + local batch = {} + for i, s in ipairs(snapshots) do + table.insert(batch, s) + if #batch == 20 or i + 1 == #snapshots then + ok = ws:send(tojson(batch)) + batch = {} + end + end + -- Publish stats updates periodically + while ok do + -- Get last snapshot + local id = #snapshots - 1 + if id > 0 and snapshots[id].time ~= last then + local push = tojson(snapshots[id]) + last = snapshots[id].time + ok = ws:send(push) + end + worker.sleep(1) + end +end + +-- Render stats in Prometheus text format +local function serve_prometheus() + -- First aggregate metrics list and print counters + local slist, render = getstats(), {} + local latency = {} + local counter = '# TYPE %s counter\n%s %f' + for k,v in pairs(slist) do + k = select(1, k:gsub('%.', '_')) + -- Aggregate histograms + local band = k:match('answer_([%d]+)ms') + if band then + table.insert(latency, {band, v}) + elseif k == 'answer_slow' then + table.insert(latency, {'+Inf', v}) + -- Counter as a fallback + else + local key = M.namespace .. k + table.insert(render, string.format(counter, key, key, v)) + end + end + -- Fill in latency histogram + local function kweight(x) return tonumber(x) or math.huge end + table.sort(latency, function (a,b) return kweight(a[1]) < kweight(b[1]) end) + table.insert(render, string.format('# TYPE %slatency histogram', M.namespace)) + local count, sum = 0.0, 0.0 + for _,e in ipairs(latency) do + -- The information about the %Inf bin is lost, so we treat it + -- as a timeout (3000ms) for metrics purposes + count = count + e[2] + sum = sum + e[2] * (math.min(tonumber(e[1]), 3000.0)) + table.insert(render, string.format('%slatency_bucket{le="%s"} %f', M.namespace, e[1], count)) + end + table.insert(render, string.format('%slatency_count %f', M.namespace, count)) + table.insert(render, string.format('%slatency_sum %f', M.namespace, sum)) + -- Finalize metrics table before rendering + if type(M.finalize) == 'function' then + M.finalize(render) + end + return table.concat(render, '\n') .. '\n' +end + +-- Export module interface +M.init = snapshot_start +M.deinit = snapshot_end +M.endpoints = { + ['/stats'] = {'application/json', getstats, stream_stats}, + ['/frequent'] = {'application/json', function () return stats.frequent() end}, + ['/upstreams'] = {'application/json', function () return stats.upstreams() end}, + ['/bogus'] = {'application/json', function () return bogus_log.frequent() end}, + ['/metrics'] = {'text/plain; version=0.0.4', serve_prometheus}, +} + +return M diff --git a/modules/http/static/LICENSE b/modules/http/static/LICENSE new file mode 100644 index 0000000..51f768f --- /dev/null +++ b/modules/http/static/LICENSE @@ -0,0 +1,7 @@ +jQuery is provided under MIT license +D3 under BSD license +Epoch under MIT license +TopoJSON under BSD license +DataMaps under MIT license +Bootstrap under MIT license +Selectize.js under Apache 2.0 license diff --git a/modules/http/static/bootstrap-theme.min.css b/modules/http/static/bootstrap-theme.min.css new file mode 100644 index 0000000..dc95d8e --- /dev/null +++ b/modules/http/static/bootstrap-theme.min.css @@ -0,0 +1,6 @@ +/*! + * Bootstrap v3.3.6 (http://getbootstrap.com) + * Copyright 2011-2015 Twitter, Inc. + * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) + */.btn-danger,.btn-default,.btn-info,.btn-primary,.btn-success,.btn-warning{text-shadow:0 -1px 0 rgba(0,0,0,.2);-webkit-box-shadow:inset 0 1px 0 rgba(255,255,255,.15),0 1px 1px rgba(0,0,0,.075);box-shadow:inset 0 1px 0 rgba(255,255,255,.15),0 1px 1px rgba(0,0,0,.075)}.btn-danger.active,.btn-danger:active,.btn-default.active,.btn-default:active,.btn-info.active,.btn-info:active,.btn-primary.active,.btn-primary:active,.btn-success.active,.btn-success:active,.btn-warning.active,.btn-warning:active{-webkit-box-shadow:inset 0 3px 5px rgba(0,0,0,.125);box-shadow:inset 0 3px 5px 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this.dateWindow_?this.dateWindow_:this.xAxisExtremes()},Q.prototype.xAxisExtremes=function(){var t=this.getNumericOption("xRangePad")/this.plotter_.area.w;if(0===this.numRows())return[0-t,1+t];var e=this.rawData_[0][0],a=this.rawData_[this.rawData_.length-1][0];if(t){var i=a-e;e-=i*t,a+=i*t}return[e,a]},Q.prototype.yAxisExtremes=function(){var t=this.gatherDatasets_(this.rolledSeries_,null),e=t.extremes,a=this.axes_;this.computeYAxisRanges_(e);var i=this.axes_;return this.axes_=a,i.map(function(t){return t.extremeRange})},Q.prototype.yAxisRange=function(t){if(void 0===t&&(t=0),t<0||t>=this.axes_.length)return null;var e=this.axes_[t];return[e.computedValueRange[0],e.computedValueRange[1]]},Q.prototype.yAxisRanges=function(){for(var t=[],e=0;ethis.rawData_.length?null:e<0||e>this.rawData_[t].length?null:this.rawData_[t][e]},Q.prototype.createInterface_=function(){var t=this.maindiv_;this.graphDiv=document.createElement("div"),this.graphDiv.style.textAlign="left",this.graphDiv.style.position="relative",t.appendChild(this.graphDiv),this.canvas_=x.createCanvas(),this.canvas_.style.position="absolute",this.hidden_=this.createPlotKitCanvas_(this.canvas_),this.canvas_ctx_=x.getContext(this.canvas_),this.hidden_ctx_=x.getContext(this.hidden_),this.resizeElements_(),this.graphDiv.appendChild(this.hidden_),this.graphDiv.appendChild(this.canvas_),this.mouseEventElement_=this.createMouseEventElement_(),this.layout_=new h.default(this);var e=this;this.mouseMoveHandler_=function(t){e.mouseMove_(t)},this.mouseOutHandler_=function(t){var a=t.target||t.fromElement,i=t.relatedTarget||t.toElement;x.isNodeContainedBy(a,e.graphDiv)&&!x.isNodeContainedBy(i,e.graphDiv)&&e.mouseOut_(t)},this.addAndTrackEvent(window,"mouseout",this.mouseOutHandler_),this.addAndTrackEvent(this.mouseEventElement_,"mousemove",this.mouseMoveHandler_),this.resizeHandler_||(this.resizeHandler_=function(t){e.resize()},this.addAndTrackEvent(window,"resize",this.resizeHandler_))},Q.prototype.resizeElements_=function(){this.graphDiv.style.width=this.width_+"px",this.graphDiv.style.height=this.height_+"px";var t=this.getNumericOption("pixelRatio"),e=t||x.getContextPixelRatio(this.canvas_ctx_);this.canvas_.width=this.width_*e,this.canvas_.height=this.height_*e,this.canvas_.style.width=this.width_+"px",this.canvas_.style.height=this.height_+"px",1!==e&&this.canvas_ctx_.scale(e,e);var a=t||x.getContextPixelRatio(this.hidden_ctx_);this.hidden_.width=this.width_*a,this.hidden_.height=this.height_*a,this.hidden_.style.width=this.width_+"px",this.hidden_.style.height=this.height_+"px",1!==a&&this.hidden_ctx_.scale(a,a)},Q.prototype.destroy=function(){this.canvas_ctx_.restore(),this.hidden_ctx_.restore();for(var t=this.plugins_.length-1;t>=0;t--){var e=this.plugins_.pop();e.plugin.destroy&&e.plugin.destroy()}this.removeTrackedEvents_(),x.removeEvent(window,"mouseout",this.mouseOutHandler_),x.removeEvent(this.mouseEventElement_,"mousemove",this.mouseMoveHandler_),x.removeEvent(window,"resize",this.resizeHandler_),this.resizeHandler_=null,function t(e){for(;e.hasChildNodes();)t(e.firstChild),e.removeChild(e.firstChild)}(this.maindiv_);var a=function(t){for(var e in t)"object"==typeof t[e]&&(t[e]=null)};a(this.layout_),a(this.plotter_),a(this)},Q.prototype.createPlotKitCanvas_=function(t){var e=x.createCanvas();return e.style.position="absolute",e.style.top=t.style.top,e.style.left=t.style.left, +e.width=this.width_,e.height=this.height_,e.style.width=this.width_+"px",e.style.height=this.height_+"px",e},Q.prototype.createMouseEventElement_=function(){return this.canvas_},Q.prototype.setColors_=function(){var t=this.getLabels(),e=t.length-1;this.colors_=[],this.colorsMap_={};for(var a=this.getNumericOption("colorSaturation")||1,i=this.getNumericOption("colorValue")||.5,n=Math.ceil(e/2),r=this.getOption("colors"),o=this.visibility(),s=0;s=0;--u)for(var d=this.layout_.points[u],c=0;c=l.length)){var h=l[s];if(x.isValidPoint(h)){var u=h.canvasy;if(t>h.canvasx&&s+10){var p=(t-h.canvasx)/c;u+=p*(d.canvasy-h.canvasy)}}}else if(t0){var g=l[s-1];if(x.isValidPoint(g)){var c=h.canvasx-g.canvasx;if(c>0){var p=(h.canvasx-t)/c;u+=p*(g.canvasy-h.canvasy)}}}(0===r||u=0){var r=0,o=this.attr_("labels");for(e=1;er&&(r=s)}var l=this.previousVerticalX_;a.clearRect(l-r-1,0,2*r+2,this.height_)}if(this.selPoints_.length>0){var h=this.selPoints_[0].canvasx;for(a.save(),e=0;e=0){t!=this.lastRow_&&(i=!0),this.lastRow_=t;for(var n=0;n=0&&o=0&&(i=!0),this.lastRow_=-1;return this.selPoints_.length?this.lastx_=this.selPoints_[0].xval:this.lastx_=-1,void 0!==e&&(this.highlightSet_!==e&&(i=!0),this.highlightSet_=e),void 0!==a&&(this.lockedSet_=a),i&&this.updateSelection_(void 0),i},Q.prototype.mouseOut_=function(t){this.getFunctionOption("unhighlightCallback")&&this.getFunctionOption("unhighlightCallback").call(this,t),this.getBooleanOption("hideOverlayOnMouseOut")&&!this.lockedSet_&&this.clearSelection()},Q.prototype.clearSelection=function(){if(this.cascadeEvents_("deselect",{}),this.lockedSet_=!1,this.fadeLevel)return void this.animateSelection_(-1);this.canvas_ctx_.clearRect(0,0,this.width_,this.height_),this.fadeLevel=0,this.selPoints_=[],this.lastx_=-1,this.lastRow_=-1,this.highlightSet_=null},Q.prototype.getSelection=function(){if(!this.selPoints_||this.selPoints_.length<1)return-1;for(var t=0;t1&&(a=this.dataHandler_.rollingAverage(a,this.rollPeriod_,this.attributes_)),this.rolledSeries_.push(a)}this.drawGraph_();var i=new Date;this.drawingTimeMs_=i-t},Q.PointType=void 0,Q.stackPoints_=function(t,e,a,i){for(var n=null,r=null,o=null,s=-1,l=0;l=e))for(var a=e;aa[1]&&(a[1]=c),c=1;a--)if(this.visibility()[a-1]){if(e){s=t[a];var p=e[0],g=e[1];for(n=null,r=null,i=0;i=p&&null===n&&(n=i),s[i][0]<=g&&(r=i);null===n&&(n=0);for(var f=n,_=!0;_&&f>0;)f--,_=null===s[f][1];null===r&&(r=s.length-1);var v=r;for(_=!0;_&&v0;){var n=this.readyFns_.pop();n(this)}},Q.prototype.computeYAxes_=function(){var t,e,a;for(this.axes_=[],t=0;t0&&(_=0),v<0&&(v=0)),_==1/0&&(_=0),v==-1/0&&(v=1),a=v-_,0===a&&(0!==v?a=Math.abs(v):(v=1,a=1));var m=v,b=_;e&&(u?(m=v+n*a,b=_):(m=v+n*a,b=_-n*a,b<0&&_>=0&&(b=0),m>0&&v<=0&&(m=0))),h.extremeRange=[b,m]}if(h.valueRange){var w=o(h.valueRange[0])?h.extremeRange[0]:h.valueRange[0],A=o(h.valueRange[1])?h.extremeRange[1]:h.valueRange[1];h.computedValueRange=[w,A]}else h.computedValueRange=h.extremeRange;if(!e)if(u){w=h.computedValueRange[0],A=h.computedValueRange[1];var O=n/(2*n-1),D=(n-1)/(2*n-1);h.computedValueRange[0]=x.logRangeFraction(w,A,O),h.computedValueRange[1]=x.logRangeFraction(w,A,D)}else w=h.computedValueRange[0],A=h.computedValueRange[1],a=A-w,h.computedValueRange[0]=w-a*n,h.computedValueRange[1]=A+a*n;if(c){h.independentTicks=c;var E=this.optionsViewForAxis_("y"+(l?"2":"")),L=E("ticker");h.ticks=L(h.computedValueRange[0],h.computedValueRange[1],this.plotter_.area.h,E,this),r||(r=h)}}if(void 0===r)throw'Configuration Error: At least one axis has to have the "independentTicks" option activated.';for(var l=0;l0&&"e"!=t[a-1]&&"E"!=t[a-1]||t.indexOf("/")>=0||isNaN(parseFloat(t))?e=!0:8==t.length&&t>"19700101"&&t<"20371231"&&(e=!0),this.setXAxisOptions_(e)},Q.prototype.setXAxisOptions_=function(t){t?(this.attrs_.xValueParser=x.dateParser,this.attrs_.axes.x.valueFormatter=x.dateValueFormatter,this.attrs_.axes.x.ticker=v.dateTicker,this.attrs_.axes.x.axisLabelFormatter=x.dateAxisLabelFormatter):(this.attrs_.xValueParser=function(t){return parseFloat(t)},this.attrs_.axes.x.valueFormatter=function(t){return t},this.attrs_.axes.x.ticker=v.numericTicks,this.attrs_.axes.x.axisLabelFormatter=this.attrs_.axes.x.valueFormatter)},Q.prototype.parseCSV_=function(t){var e,a,i=[],n=x.detectLineDelimiter(t),r=t.split(n||"\n"),o=this.getStringOption("delimiter");-1==r[0].indexOf(o)&&r[0].indexOf("\t")>=0&&(o="\t");var s=0;"labels"in this.user_attrs_||(s=1,this.attrs_.labels=r[0].split(o),this.attributes_.reparseSeries());for(var l,h=!1,u=this.attr_("labels").length,d=!1,c=s;c0&&f[0]0;)e=String.fromCharCode(65+(t-1)%26)+e.toLowerCase(),t=Math.floor((t-1)/26);return e}(g.length),y.text="";for(var m=0;m0&&f[0]0&&this.setAnnotations(g,!0),this.attributes_.reparseSeries()},Q.prototype.cascadeDataDidUpdateEvent_=function(){this.cascadeEvents_("dataDidUpdate",{})},Q.prototype.start_=function(){var t=this.file_;if("function"==typeof t&&(t=t()),x.isArrayLike(t))this.rawData_=this.parseArray_(t),this.cascadeDataDidUpdateEvent_(),this.predraw_();else if("object"==typeof t&&"function"==typeof t.getColumnRange)this.parseDataTable_(t),this.cascadeDataDidUpdateEvent_(),this.predraw_();else if("string"==typeof t){var e=x.detectLineDelimiter(t);if(e)this.loadedEvent_(t);else{var a;a=window.XMLHttpRequest?new XMLHttpRequest:new ActiveXObject("Microsoft.XMLHTTP");var i=this;a.onreadystatechange=function(){4==a.readyState&&(200!==a.status&&0!==a.status||i.loadedEvent_(a.responseText))},a.open("GET",t,!0),a.send(null)}}else console.error("Unknown data format: "+typeof t)},Q.prototype.updateOptions=function(t,e){void 0===e&&(e=!1);var a=t.file,i=Q.copyUserAttrs_(t);"rollPeriod"in i&&(this.rollPeriod_=i.rollPeriod),"dateWindow"in i&&(this.dateWindow_=i.dateWindow);var n=x.isPixelChangingOptionList(this.attr_("labels"),i);x.updateDeep(this.user_attrs_,i),this.attributes_.reparseSeries(),a?(this.cascadeEvents_("dataWillUpdate",{}),this.file_=a,e||this.start_()):e||(n?this.predraw_():this.renderGraph_(!1))},Q.copyUserAttrs_=function(t){var e={};for(var a in t)t.hasOwnProperty(a)&&"file"!=a&&t.hasOwnProperty(a)&&(e[a]=t[a]);return e},Q.prototype.resize=function(t,e){if(!this.resize_lock){this.resize_lock=!0,null===t!=(null===e)&&(console.warn("Dygraph.resize() should be called with zero parameters or two non-NULL parameters. Pretending it was zero."),t=e=null);var a=this.width_,i=this.height_;t?(this.maindiv_.style.width=t+"px",this.maindiv_.style.height=e+"px",this.width_=t,this.height_=e):(this.width_=this.maindiv_.clientWidth,this.height_=this.maindiv_.clientHeight),a==this.width_&&i==this.height_||(this.resizeElements_(),this.predraw_()),this.resize_lock=!1}},Q.prototype.adjustRoll=function(t){this.rollPeriod_=t,this.predraw_()},Q.prototype.visibility=function(){for(this.getOption("visibility")||(this.attrs_.visibility=[]);this.getOption("visibility").length=a.length?console.warn("Invalid series number in setVisibility: "+n):a[n]=t[n]);else for(var n=0;n=a.length?console.warn("Invalid series number in setVisibility: "+n):a[n]=t[n]:t[n]<0||t[n]>=a.length?console.warn("Invalid series number in setVisibility: "+t[n]):a[t[n]]=e;this.predraw_()},Q.prototype.size=function(){return{width:this.width_,height:this.height_}},Q.prototype.setAnnotations=function(t,e){if(this.annotations_=t,!this.layout_)return void console.warn("Tried to setAnnotations before dygraph was ready. Try setting them in a ready() block. See dygraphs.com/tests/annotation.html");this.layout_.setAnnotations(this.annotations_),e||this.predraw_()},Q.prototype.annotations=function(){return this.annotations_},Q.prototype.getLabels=function(){var t=this.attr_("labels");return t?t.slice():null},Q.prototype.indexFromSetName=function(t){return this.setIndexByName_[t]},Q.prototype.getRowForX=function(t){for(var e=0,a=this.numRows()-1;e<=a;){var i=a+e>>1,n=this.getValue(i,0);if(nt)a=i-1;else{if(e==i)return i;a=i}}return null},Q.prototype.ready=function(t){this.is_initial_draw_?this.readyFns_.push(t):t.call(this,this)},Q.prototype.addAndTrackEvent=function(t,e,a){x.addEvent(t,e,a),this.registeredEvents_.push({elem:t,type:e,fn:a})},Q.prototype.removeTrackedEvents_=function(){if(this.registeredEvents_)for(var t=0;tr.x+r.w||l.canvasyr.y+r.h)){var h=l.annotation,u=6;h.hasOwnProperty("tickHeight")&&(u=h.tickHeight);var d=document.createElement("div") +;d.style.fontSize=e.getOption("axisLabelFontSize")+"px";var c="dygraph-annotation";h.hasOwnProperty("icon")||(c+=" dygraphDefaultAnnotation dygraph-default-annotation"),h.hasOwnProperty("cssClass")&&(c+=" "+h.cssClass),d.className=c;var p=h.hasOwnProperty("width")?h.width:16,g=h.hasOwnProperty("height")?h.height:16;if(h.hasOwnProperty("icon")){var f=document.createElement("img");f.src=h.icon,f.width=p,f.height=g,d.appendChild(f)}else l.annotation.hasOwnProperty("shortText")&&d.appendChild(document.createTextNode(l.annotation.shortText));var _=l.canvasx-p/2;d.style.left=_+"px";var v=0;if(h.attachAtBottom){var y=r.y+r.h-g-u;o[_]?y-=o[_]:o[_]=0,o[_]+=u+g,v=y}else v=l.canvasy-g-u;d.style.top=v+"px",d.style.width=p+"px",d.style.height=g+"px",d.title=l.annotation.text,d.style.color=e.colorsMap_[l.name],d.style.borderColor=e.colorsMap_[l.name],h.div=d,e.addAndTrackEvent(d,"click",n("clickHandler","annotationClickHandler",l)),e.addAndTrackEvent(d,"mouseover",n("mouseOverHandler","annotationMouseOverHandler",l)),e.addAndTrackEvent(d,"mouseout",n("mouseOutHandler","annotationMouseOutHandler",l)),e.addAndTrackEvent(d,"dblclick",n("dblClickHandler","annotationDblClickHandler",l)),i.appendChild(d),this.annotations_.push(d);var x=t.drawingContext;if(x.save(),x.strokeStyle=h.hasOwnProperty("tickColor")?h.tickColor:e.colorsMap_[l.name],x.lineWidth=h.hasOwnProperty("tickWidth")?h.tickWidth:e.getOption("strokeWidth"),x.beginPath(),h.attachAtBottom){var y=v+g;x.moveTo(l.canvasx,y),x.lineTo(l.canvasx,y+u)}else x.moveTo(l.canvasx,l.canvasy),x.lineTo(l.canvasx,l.canvasy-2-u);x.closePath(),x.stroke(),x.restore()}}},i.prototype.destroy=function(){this.detachLabels()},a.default=i,e.exports=a.default},{}],21:[function(t,e,a){"use strict";Object.defineProperty(a,"__esModule",{value:!0});var i=t("../dygraph-utils"),n=function(t){if(t&&t.__esModule)return t;var e={};if(null!=t)for(var a in t)Object.prototype.hasOwnProperty.call(t,a)&&(e[a]=t[a]);return e.default=t,e}(i),r=function(){this.xlabels_=[],this.ylabels_=[]};r.prototype.toString=function(){return"Axes Plugin"},r.prototype.activate=function(t){return{layout:this.layout,clearChart:this.clearChart,willDrawChart:this.willDrawChart}},r.prototype.layout=function(t){var e=t.dygraph;if(e.getOptionForAxis("drawAxis","y")){var a=e.getOptionForAxis("axisLabelWidth","y")+2*e.getOptionForAxis("axisTickSize","y");t.reserveSpaceLeft(a)}if(e.getOptionForAxis("drawAxis","x")){var i;i=e.getOption("xAxisHeight")?e.getOption("xAxisHeight"):e.getOptionForAxis("axisLabelFontSize","x")+2*e.getOptionForAxis("axisTickSize","x"),t.reserveSpaceBottom(i)}if(2==e.numAxes()){if(e.getOptionForAxis("drawAxis","y2")){var a=e.getOptionForAxis("axisLabelWidth","y2")+2*e.getOptionForAxis("axisTickSize","y2");t.reserveSpaceRight(a)}}else e.numAxes()>2&&e.error("Only two y-axes are supported at this time. (Trying to use "+e.numAxes()+")")},r.prototype.detachLabels=function(){function t(t){for(var e=0;e0){var x=r.numAxes(),m=[y("y"),y("y2")];_.yticks.forEach(function(t){if(void 0!==t.label){s=v.x;var e="y1",a=m[0];1==t.axis&&(s=v.x+v.w,-1,e="y2",a=m[1]);var n=a("axisLabelFontSize");l=v.y+t.pos*v.h,o=f(t.label,"y",2==x?e:null);var r=l-n/2;r<0&&(r=0),r+n+3>c?o.style.bottom="0":o.style.top=r+"px",0===t.axis?(o.style.left=v.x-a("axisLabelWidth")-a("axisTickSize")+"px",o.style.textAlign="right"):1==t.axis&&(o.style.left=v.x+v.w+a("axisTickSize")+"px",o.style.textAlign="left"),o.style.width=a("axisLabelWidth")+"px",u.appendChild(o),i.ylabels_.push(o)}});var b=this.ylabels_[0],w=r.getOptionForAxis("axisLabelFontSize","y");parseInt(b.style.top,10)+w>c-w&&(b.style.top=parseInt(b.style.top,10)-w/2+"px")}var A;if(r.getOption("drawAxesAtZero")){var O=r.toPercentXCoord(0);(O>1||O<0||isNaN(O))&&(O=0),A=e(v.x+O*v.w)}else A=e(v.x);h.strokeStyle=r.getOptionForAxis("axisLineColor","y"),h.lineWidth=r.getOptionForAxis("axisLineWidth","y"),h.beginPath(),h.moveTo(A,a(v.y)),h.lineTo(A,a(v.y+v.h)),h.closePath(),h.stroke(),2==r.numAxes()&&(h.strokeStyle=r.getOptionForAxis("axisLineColor","y2"),h.lineWidth=r.getOptionForAxis("axisLineWidth","y2"),h.beginPath(),h.moveTo(a(v.x+v.w),a(v.y)),h.lineTo(a(v.x+v.w),a(v.y+v.h)),h.closePath(),h.stroke())}if(r.getOptionForAxis("drawAxis","x")){if(_.xticks){var D=y("x");_.xticks.forEach(function(t){if(void 0!==t.label){s=v.x+t.pos*v.w,l=v.y+v.h,o=f(t.label,"x"),o.style.textAlign="center",o.style.top=l+D("axisTickSize")+"px";var e=s-D("axisLabelWidth")/2;e+D("axisLabelWidth")>d&&(e=d-D("axisLabelWidth"),o.style.textAlign="right"),e<0&&(e=0,o.style.textAlign="left"),o.style.left=e+"px",o.style.width=D("axisLabelWidth")+"px",u.appendChild(o),i.xlabels_.push(o)}})}h.strokeStyle=r.getOptionForAxis("axisLineColor","x"),h.lineWidth=r.getOptionForAxis("axisLineWidth","x"),h.beginPath();var E;if(r.getOption("drawAxesAtZero")){var O=r.toPercentYCoord(0,0);(O>1||O<0)&&(O=1),E=a(v.y+O*v.h)}else E=a(v.y+v.h);h.moveTo(e(v.x),E),h.lineTo(e(v.x+v.w),E),h.closePath(),h.stroke()}h.restore()}},a.default=r,e.exports=a.default},{"../dygraph-utils":17}],22:[function(t,e,a){"use strict";Object.defineProperty(a,"__esModule",{value:!0});var i=function(){this.title_div_=null,this.xlabel_div_=null,this.ylabel_div_=null,this.y2label_div_=null};i.prototype.toString=function(){return"ChartLabels Plugin"},i.prototype.activate=function(t){return{layout:this.layout,didDrawChart:this.didDrawChart}};var n=function(t){var e=document.createElement("div");return e.style.position="absolute",e.style.left=t.x+"px",e.style.top=t.y+"px",e.style.width=t.w+"px",e.style.height=t.h+"px",e};i.prototype.detachLabels_=function(){for(var t=[this.title_div_,this.xlabel_div_,this.ylabel_div_,this.y2label_div_],e=0;e=2);o=h.yticks,l.save(),o.forEach(function(t){if(t.has_tick){var r=t.axis;g[r]&&(l.save(),f[r]&&l.setLineDash&&l.setLineDash(_[r]),l.strokeStyle=c[r],l.lineWidth=p[r],i=e(u.x),n=a(u.y+t.pos*u.h),l.beginPath(),l.moveTo(i,n),l.lineTo(i+u.w,n),l.stroke(),l.restore())}}),l.restore()}if(s.getOptionForAxis("drawGrid","x")){o=h.xticks,l.save();var _=s.getOptionForAxis("gridLinePattern","x"),f=_&&_.length>=2;f&&l.setLineDash&&l.setLineDash(_),l.strokeStyle=s.getOptionForAxis("gridLineColor","x"),l.lineWidth=s.getOptionForAxis("gridLineWidth","x"),o.forEach(function(t){t.has_tick&&(i=e(u.x+t.pos*u.w),n=a(u.y+u.h),l.beginPath(),l.moveTo(i,n),l.lineTo(i,u.y),l.closePath(),l.stroke())}),f&&l.setLineDash&&l.setLineDash([]),l.restore()}},i.prototype.destroy=function(){},a.default=i,e.exports=a.default},{}],24:[function(t,e,a){"use strict";function i(t,e,a){if(!t||t.length<=1)return'
';var i,n,r,o,s,l=0,h=0,u=[];for(i=0;i<=t.length;i++)l+=t[i%t.length];if((s=Math.floor(a/(l-t[0])))>1){for(i=0;i';return d}Object.defineProperty(a,"__esModule",{value:!0});var n=t("../dygraph-utils"),r=function(t){if(t&&t.__esModule)return t;var e={};if(null!=t)for(var a in t)Object.prototype.hasOwnProperty.call(t,a)&&(e[a]=t[a]);return e.default=t,e}(n),o=function(){this.legend_div_=null,this.is_generated_div_=!1};o.prototype.toString=function(){return"Legend Plugin"},o.prototype.activate=function(t){var e,a=t.getOption("labelsDiv");return a&&null!==a?e="string"==typeof a||a instanceof String?document.getElementById(a):a:(e=document.createElement("div"),e.className="dygraph-legend",t.graphDiv.appendChild(e),this.is_generated_div_=!0),this.legend_div_=e,this.one_em_width_=10,{select:this.select,deselect:this.deselect,predraw:this.predraw,didDrawChart:this.didDrawChart}};var s=function(t){var e=document.createElement("span");e.setAttribute("style","margin: 0; padding: 0 0 0 1em; border: 0;"),t.appendChild(e);var a=e.offsetWidth;return t.removeChild(e),a},l=function(t){return t.replace(/&/g,"&").replace(/"/g,""").replace(//g,">")};o.prototype.select=function(t){var e=t.selectedX,a=t.selectedPoints,i=t.selectedRow,n=t.dygraph.getOption("legend");if("never"===n)return void(this.legend_div_.style.display="none");if("follow"===n){var r=t.dygraph.plotter_.area,s=this.legend_div_.offsetWidth,l=t.dygraph.getOptionForAxis("axisLabelWidth","y"),h=a[0].x*r.w+50,u=a[0].y*r.h-50;h+s+1>r.w&&(h=h-100-s-(l-r.x)),t.dygraph.graphDiv.appendChild(this.legend_div_),this.legend_div_.style.left=l+h+"px",this.legend_div_.style.top=u+"px"}var d=o.generateLegendHTML(t.dygraph,e,a,this.one_em_width_,i);this.legend_div_.innerHTML=d,this.legend_div_.style.display=""},o.prototype.deselect=function(t){"always"!==t.dygraph.getOption("legend")&&(this.legend_div_.style.display="none");var e=s(this.legend_div_);this.one_em_width_=e;var a=o.generateLegendHTML(t.dygraph,void 0,void 0,e,null);this.legend_div_.innerHTML=a},o.prototype.didDrawChart=function(t){this.deselect(t)},o.prototype.predraw=function(t){if(this.is_generated_div_){t.dygraph.graphDiv.appendChild(this.legend_div_);var e=t.dygraph.getArea(),a=this.legend_div_.offsetWidth;this.legend_div_.style.left=e.x+e.w-a-1+"px",this.legend_div_.style.top=e.y+"px"}},o.prototype.destroy=function(){this.legend_div_=null},o.generateLegendHTML=function(t,e,a,n,s){var h={dygraph:t,x:e,series:[]},u={},d=t.getLabels();if(d)for(var c=1;c":" "),a+=""+r.dashHTML+" "+r.labelHTML+"")}return a}a=t.xHTML+":";for(var n=0;n");a+=" "+r.labelHTML+": "+r.yHTML+""}}return a},a.default=o,e.exports=a.default},{"../dygraph-utils":17}],25:[function(t,e,a){"use strict";function i(t){return t&&t.__esModule?t:{default:t}}Object.defineProperty(a,"__esModule",{value:!0});var n=t("../dygraph-utils"),r=function(t){if(t&&t.__esModule)return t;var e={};if(null!=t)for(var a in t)Object.prototype.hasOwnProperty.call(t,a)&&(e[a]=t[a]);return e.default=t,e}(n),o=t("../dygraph-interaction-model"),s=i(o),l=t("../iframe-tarp"),h=i(l),u=function(){this.hasTouchInterface_="undefined"!=typeof TouchEvent,this.isMobileDevice_=/mobile|android/gi.test(navigator.appVersion),this.interfaceCreated_=!1};u.prototype.toString=function(){return"RangeSelector Plugin"},u.prototype.activate=function(t){return this.dygraph_=t,this.getOption_("showRangeSelector")&&this.createInterface_(),{layout:this.reserveSpace_,predraw:this.renderStaticLayer_,didDrawChart:this.renderInteractiveLayer_}},u.prototype.destroy=function(){this.bgcanvas_=null,this.fgcanvas_=null,this.leftZoomHandle_=null,this.rightZoomHandle_=null},u.prototype.getOption_=function(t,e){return this.dygraph_.getOption(t,e)},u.prototype.setDefaultOption_=function(t,e){this.dygraph_.attrs_[t]=e},u.prototype.createInterface_=function(){this.createCanvases_(),this.createZoomHandles_(),this.initInteraction_(),this.getOption_("animatedZooms")&&(console.warn("Animated zooms and range selector are not compatible; disabling animatedZooms."),this.dygraph_.updateOptions({animatedZooms:!1},!0)),this.interfaceCreated_=!0,this.addToGraph_()},u.prototype.addToGraph_=function(){var t=this.graphDiv_=this.dygraph_.graphDiv;t.appendChild(this.bgcanvas_),t.appendChild(this.fgcanvas_),t.appendChild(this.leftZoomHandle_),t.appendChild(this.rightZoomHandle_)},u.prototype.removeFromGraph_=function(){var t=this.graphDiv_;t.removeChild(this.bgcanvas_),t.removeChild(this.fgcanvas_),t.removeChild(this.leftZoomHandle_),t.removeChild(this.rightZoomHandle_),this.graphDiv_=null},u.prototype.reserveSpace_=function(t){this.getOption_("showRangeSelector")&&t.reserveSpaceBottom(this.getOption_("rangeSelectorHeight")+4)},u.prototype.renderStaticLayer_=function(){this.updateVisibility_()&&(this.resize_(),this.drawStaticLayer_())},u.prototype.renderInteractiveLayer_=function(){this.updateVisibility_()&&!this.isChangingRange_&&(this.placeZoomHandles_(),this.drawInteractiveLayer_())},u.prototype.updateVisibility_=function(){var t=this.getOption_("showRangeSelector");if(t)this.interfaceCreated_?this.graphDiv_&&this.graphDiv_.parentNode||this.addToGraph_():this.createInterface_();else if(this.graphDiv_){this.removeFromGraph_();var e=this.dygraph_;setTimeout(function(){e.width_=0,e.resize()},1)}return t},u.prototype.resize_=function(){function t(t,e,a,i){var n=i||r.getContextPixelRatio(e);t.style.top=a.y+"px",t.style.left=a.x+"px",t.width=a.w*n,t.height=a.h*n,t.style.width=a.w+"px",t.style.height=a.h+"px",1!=n&&e.scale(n,n)}var e=this.dygraph_.layout_.getPlotArea(),a=0;this.dygraph_.getOptionForAxis("drawAxis","x")&&(a=this.getOption_("xAxisHeight")||this.getOption_("axisLabelFontSize")+2*this.getOption_("axisTickSize")),this.canvasRect_={x:e.x,y:e.y+e.h+a+4,w:e.w,h:this.getOption_("rangeSelectorHeight")};var i=this.dygraph_.getNumericOption("pixelRatio");t(this.bgcanvas_,this.bgcanvas_ctx_,this.canvasRect_,i),t(this.fgcanvas_,this.fgcanvas_ctx_,this.canvasRect_,i)},u.prototype.createCanvases_=function(){this.bgcanvas_=r.createCanvas(),this.bgcanvas_.className="dygraph-rangesel-bgcanvas",this.bgcanvas_.style.position="absolute",this.bgcanvas_.style.zIndex=9,this.bgcanvas_ctx_=r.getContext(this.bgcanvas_),this.fgcanvas_=r.createCanvas(),this.fgcanvas_.className="dygraph-rangesel-fgcanvas",this.fgcanvas_.style.position="absolute",this.fgcanvas_.style.zIndex=9,this.fgcanvas_.style.cursor="default",this.fgcanvas_ctx_=r.getContext(this.fgcanvas_)},u.prototype.createZoomHandles_=function(){var t=new Image;t.className="dygraph-rangesel-zoomhandle",t.style.position="absolute",t.style.zIndex=10,t.style.visibility="hidden",t.style.cursor="col-resize",t.width=9,t.height=16,t.src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAkAAAAQCAYAAADESFVDAAAAAXNSR0IArs4c6QAAAAZiS0dEANAAzwDP4Z7KegAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAAd0SU1FB9sHGw0cMqdt1UwAAAAZdEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAaElEQVQoz+3SsRFAQBCF4Z9WJM8KCDVwownl6YXsTmCUsyKGkZzcl7zkz3YLkypgAnreFmDEpHkIwVOMfpdi9CEEN2nGpFdwD03yEqDtOgCaun7sqSTDH32I1pQA2Pb9sZecAxc5r3IAb21d6878xsAAAAAASUVORK5CYII=",this.isMobileDevice_&&(t.width*=2,t.height*=2),this.leftZoomHandle_=t,this.rightZoomHandle_=t.cloneNode(!1)},u.prototype.initInteraction_=function(){var t,e,a,i,n,o,l,u,d,c,p,g,f,_,v=this,y=document,x=0,m=null,b=!1,w=!1,A=!this.isMobileDevice_,O=new h.default;t=function(t){var e=v.dygraph_.xAxisExtremes(),a=(e[1]-e[0])/v.canvasRect_.w;return[e[0]+(t.leftHandlePos-v.canvasRect_.x)*a,e[0]+(t.rightHandlePos-v.canvasRect_.x)*a]},e=function(t){return r.cancelEvent(t),b=!0,x=t.clientX,m=t.target?t.target:t.srcElement,"mousedown"!==t.type&&"dragstart"!==t.type||(r.addEvent(y,"mousemove",a),r.addEvent(y,"mouseup",i)),v.fgcanvas_.style.cursor="col-resize",O.cover(),!0},a=function(t){if(!b)return!1;r.cancelEvent(t);var e=t.clientX-x;if(Math.abs(e)<4)return!0;x=t.clientX;var a,i=v.getZoomHandleStatus_();m==v.leftZoomHandle_?(a=i.leftHandlePos+e,a=Math.min(a,i.rightHandlePos-m.width-3),a=Math.max(a,v.canvasRect_.x)):(a=i.rightHandlePos+e,a=Math.min(a,v.canvasRect_.x+v.canvasRect_.w),a=Math.max(a,i.leftHandlePos+m.width+3));var o=m.width/2;return m.style.left=a-o+"px",v.drawInteractiveLayer_(),A&&n(),!0},i=function(t){return!!b&&(b=!1,O.uncover(),r.removeEvent(y,"mousemove",a),r.removeEvent(y,"mouseup",i),v.fgcanvas_.style.cursor="default",A||n(),!0)},n=function(){try{var e=v.getZoomHandleStatus_();if(v.isChangingRange_=!0,e.isZoomed){var a=t(e);v.dygraph_.doZoomXDates_(a[0],a[1])}else v.dygraph_.resetZoom()}finally{v.isChangingRange_=!1}},o=function(t){var e=v.leftZoomHandle_.getBoundingClientRect(),a=e.left+e.width/2;e=v.rightZoomHandle_.getBoundingClientRect();var i=e.left+e.width/2;return t.clientX>a&&t.clientX=v.canvasRect_.x+v.canvasRect_.w?(n=v.canvasRect_.x+v.canvasRect_.w,i=n-o):(i+=e,n+=e);var s=v.leftZoomHandle_.width/2;return v.leftZoomHandle_.style.left=i-s+"px",v.rightZoomHandle_.style.left=n-s+"px",v.drawInteractiveLayer_(),A&&c(),!0},d=function(t){return!!w&&(w=!1,r.removeEvent(y,"mousemove",u),r.removeEvent(y,"mouseup",d),A||c(),!0)},c=function(){try{v.isChangingRange_=!0,v.dygraph_.dateWindow_=t(v.getZoomHandleStatus_()),v.dygraph_.drawGraph_(!1)}finally{v.isChangingRange_=!1}},p=function(t){if(!b&&!w){var e=o(t)?"move":"default";e!=v.fgcanvas_.style.cursor&&(v.fgcanvas_.style.cursor=e)}},g=function(t){"touchstart"==t.type&&1==t.targetTouches.length?e(t.targetTouches[0])&&r.cancelEvent(t):"touchmove"==t.type&&1==t.targetTouches.length?a(t.targetTouches[0])&&r.cancelEvent(t):i(t)},f=function(t){"touchstart"==t.type&&1==t.targetTouches.length?l(t.targetTouches[0])&&r.cancelEvent(t):"touchmove"==t.type&&1==t.targetTouches.length?u(t.targetTouches[0])&&r.cancelEvent(t):d(t)},_=function(t,e){for(var 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null==n&&(n=[]),null==e&&(e={}),Epoch.isNonEmptyArray(n)?(r=Epoch.Util.defaults(e,i),"pie"===r.type||"time.heatmap"===r.type||"time.gauge"===r.type?[]:r.type.match(/^time\./)?t(n,r,function(t,i){return{time:r.time(t[0],parseInt(i)),y:r.y(t[1],parseInt(i))}}):t(n,r,function(t,i){return{x:r.x(t[0],parseInt(i)),y:r.y(t[1],parseInt(i))}})):[]},n.entry=function(t,i){var e,r,o,s,a,h;if(null==i&&(i={}),null==t)return[];for(null==i.startTime&&(i.startTime=parseInt((new Date).getTime()/1e3)),e=Epoch.isArray(t)&&Epoch.isArray(t[0])?t.map(function(t){return[t]}):[t],a=n(e,i),h=[],r=0,s=a.length;s>r;r++)o=a[r],h.push(o.values[0]);return h},n}(),Epoch.Data.Format.keyvalue=function(){var t,i,n,e,r;return i={type:"area",x:function(t,i){return parseInt(i)},y:function(t,i){return t},time:function(t,i,n){return parseInt(n)+parseInt(i)},labels:[],autoLabels:!1,keyLabels:!0,startTime:parseInt((new Date).getTime()/1e3)},t=function(t,i,n,e){var r,o,s,a,h,p;h=[];for(s in 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Date).getTime()/1e3)),a=n([t],i,e),h=[],r=0,s=a.length;s>r;r++)o=a[r],h.push(o.values[0]);return h},n}(),Epoch.data=function(){var t,i,n;return n=arguments[0],t=2<=arguments.length?slice.call(arguments,1):[],null==(i=Epoch.Data.Format[n])?[]:i.apply(i,t)},Epoch.Data.formatData=function(t,i,n){var e,r,o,s,a,h;if(null==t&&(t=[]),!Epoch.isNonEmptyArray(t))return t;if(Epoch.isString(n))return a={type:i},Epoch.data(n,t,a);if(!Epoch.isObject(n))return t;if(null==n.name||!Epoch.isString(n.name))return t;if(null==Epoch.Data.Format[n.name])return t;if(r=[n.name,t],null!=n.arguments&&Epoch.isArray(n.arguments))for(h=n.arguments,o=0,s=h.length;s>o;o++)e=h[o],r.push(e);return null!=n.options?(a=n.options,null!=i&&null==a.type&&(a.type=i),r.push(a)):null!=i&&r.push({type:i}),Epoch.data.apply(Epoch.data,r)},Epoch.Data.formatEntry=function(t,i,n){var e,r,o,s,a,h,p,l;if(null==n)return t;if(Epoch.isString(n))return p={type:i},Epoch.Data.Format[n].entry(t,p);if(!Epoch.isObject(n))return t;if(null==n.name||!Epoch.isString(n.name))return t;if(null==Epoch.Data.Format[n.name])return t;if(o=Epoch.Util.defaults(n,{}),r=[t],null!=o.arguments&&Epoch.isArray(o.arguments))for(l=o.arguments,a=0,h=l.length;h>a;a++)e=l[a],r.push(e);return null!=o.options?(p=o.options,p.type=i,r.push(p)):null!=i&&r.push({type:i}),s=Epoch.Data.Format[o.name].entry,s.apply(s,r)};var extend=function(t,i){function n(){this.constructor=t}for(var e in i)hasProp.call(i,e)&&(t[e]=i[e]);return n.prototype=i.prototype,t.prototype=new n,t.__super__=i.prototype,t},hasProp={}.hasOwnProperty;Epoch.Model=function(t){function i(t){null==t&&(t={}),i.__super__.constructor.call(this),t=Epoch.Util.defaults(t,n),this.dataFormat=t.dataFormat,this.data=t.data,this.loading=!1}var n;return extend(i,t),n={dataFormat:null},i.prototype.setData=function(t){return this.data=t,this.trigger("data:updated")},i.prototype.push=function(t){return this.entry=t,this.trigger("data:push")},i.prototype.hasData=function(){return null!=this.data},i.prototype.getData=function(t,i){return null==i&&(i=this.dataFormat),Epoch.Data.formatData(this.data,t,i)},i.prototype.getNext=function(t,i){return null==i&&(i=this.dataFormat),Epoch.Data.formatEntry(this.entry,t,i)},i}(Epoch.Events);var extend=function(t,i){function n(){this.constructor=t}for(var e in i)hasProp.call(i,e)&&(t[e]=i[e]);return n.prototype=i.prototype,t.prototype=new n,t.__super__=i.prototype,t},hasProp={}.hasOwnProperty;Epoch.Chart.Plot=function(t){function i(t){var o,s,a,h,p;for(this.options=null!=t?t:{},o=Epoch.Util.copy(this.options.margins)||{},i.__super__.constructor.call(this,this.options=Epoch.Util.defaults(this.options,e)),this.margins={},p=["top","right","bottom","left"],s=0,a=p.length;a>s;s++)h=p[s],this.margins[h]=null!=this.options.margins&&null!=this.options.margins[h]?this.options.margins[h]:this.hasAxis(h)?n[h]:6;this.g=this.svg.append("g").attr("transform","translate("+this.margins.left+", "+this.margins.top+")"),this.onAll(r)}var n,e,r;return extend(i,t),e={domain:null,range:null,axes:["left","bottom"],ticks:{top:14,bottom:14,left:5,right:5},tickFormats:{top:Epoch.Formats.regular,bottom:Epoch.Formats.regular,left:Epoch.Formats.si,right:Epoch.Formats.si}},n={top:25,right:50,bottom:25,left:50},r={"option:margins.top":"marginsChanged","option:margins.right":"marginsChanged","option:margins.bottom":"marginsChanged","option:margins.left":"marginsChanged","option:axes":"axesChanged","option:ticks.top":"ticksChanged","option:ticks.right":"ticksChanged","option:ticks.bottom":"ticksChanged","option:ticks.left":"ticksChanged","option:tickFormats.top":"tickFormatsChanged","option:tickFormats.right":"tickFormatsChanged","option:tickFormats.bottom":"tickFormatsChanged","option:tickFormats.left":"tickFormatsChanged","option:domain":"domainChanged","option:range":"rangeChanged"},i.prototype.setTickFormat=function(t,i){return this.options.tickFormats[t]=i},i.prototype.hasAxis=function(t){return this.options.axes.indexOf(t)>-1},i.prototype.innerWidth=function(){return this.width-(this.margins.left+this.margins.right)},i.prototype.innerHeight=function(){return this.height-(this.margins.top+this.margins.bottom)},i.prototype.x=function(){var t,i;return t=null!=(i=this.options.domain)?i:this.extent(function(t){return t.x}),d3.scale.linear().domain(t).range([0,this.innerWidth()])},i.prototype.y=function(t){return d3.scale.linear().domain(this._getScaleDomain(t)).range([this.innerHeight(),0])},i.prototype.bottomAxis=function(){return d3.svg.axis().scale(this.x()).orient("bottom").ticks(this.options.ticks.bottom).tickFormat(this.options.tickFormats.bottom)},i.prototype.topAxis=function(){return d3.svg.axis().scale(this.x()).orient("top").ticks(this.options.ticks.top).tickFormat(this.options.tickFormats.top)},i.prototype.leftAxis=function(){var t;return t=this.options.range?this.options.range.left:null,d3.svg.axis().scale(this.y(t)).orient("left").ticks(this.options.ticks.left).tickFormat(this.options.tickFormats.left)},i.prototype.rightAxis=function(){var t;return t=this.options.range?this.options.range.right:null,d3.svg.axis().scale(this.y(t)).orient("right").ticks(this.options.ticks.right).tickFormat(this.options.tickFormats.right)},i.prototype.draw=function(){return this._axesDrawn?this._redrawAxes():this._drawAxes(),i.__super__.draw.call(this)},i.prototype._redrawAxes=function(){return this.hasAxis("bottom")&&this.g.selectAll(".x.axis.bottom").transition().duration(500).ease("linear").call(this.bottomAxis()),this.hasAxis("top")&&this.g.selectAll(".x.axis.top").transition().duration(500).ease("linear").call(this.topAxis()),this.hasAxis("left")&&this.g.selectAll(".y.axis.left").transition().duration(500).ease("linear").call(this.leftAxis()),this.hasAxis("right")?this.g.selectAll(".y.axis.right").transition().duration(500).ease("linear").call(this.rightAxis()):void 0},i.prototype._drawAxes=function(){return this.hasAxis("bottom")&&this.g.append("g").attr("class","x axis bottom").attr("transform","translate(0, "+this.innerHeight()+")").call(this.bottomAxis()),this.hasAxis("top")&&this.g.append("g").attr("class","x axis top").call(this.topAxis()),this.hasAxis("left")&&this.g.append("g").attr("class","y axis left").call(this.leftAxis()),this.hasAxis("right")&&this.g.append("g").attr("class","y axis right").attr("transform","translate("+this.innerWidth()+", 0)").call(this.rightAxis()),this._axesDrawn=!0},i.prototype.dimensionsChanged=function(){return i.__super__.dimensionsChanged.call(this),this.g.selectAll(".axis").remove(),this._axesDrawn=!1,this.draw()},i.prototype.marginsChanged=function(){var t,i,n;if(null!=this.options.margins){i=this.options.margins;for(t in i)hasProp.call(i,t)&&(n=i[t],null==n?this.margins[t]=6:this.margins[t]=n);return this.g.transition().duration(750).attr("transform","translate("+this.margins.left+", "+this.margins.top+")"),this.draw()}},i.prototype.axesChanged=function(){var t,i,e,r;for(r=["top","right","bottom","left"],t=0,i=r.length;i>t;t++)e=r[t],(null==this.options.margins||null==this.options.margins[e])&&(this.hasAxis(e)?this.margins[e]=n[e]:this.margins[e]=6);return this.g.transition().duration(750).attr("transform","translate("+this.margins.left+", "+this.margins.top+")"),this.g.selectAll(".axis").remove(),this._axesDrawn=!1,this.draw()},i.prototype.ticksChanged=function(){return this.draw()},i.prototype.tickFormatsChanged=function(){return this.draw()},i.prototype.domainChanged=function(){return this.draw()},i.prototype.rangeChanged=function(){return this.draw()},i}(Epoch.Chart.SVG);var extend=function(t,i){function n(){this.constructor=t}for(var e in i)hasProp.call(i,e)&&(t[e]=i[e]);return n.prototype=i.prototype,t.prototype=new n,t.__super__=i.prototype,t},hasProp={}.hasOwnProperty;Epoch.Chart.Area=function(t){function i(t){var n;this.options=null!=t?t:{},null==(n=this.options).type&&(n.type="area"),i.__super__.constructor.call(this,this.options),this.draw()}return extend(i,t),i.prototype.y=function(){var t,i,n,e,r,o,s,a,h;for(t=[],o=this.getVisibleLayers(),i=0,r=o.length;r>i;i++){e=o[i],s=e.values;for(n in s)hasProp.call(s,n)&&(h=s[n],null!=t[n]&&(t[n]+=h.y),null==t[n]&&(t[n]=h.y))}return d3.scale.linear().domain(null!=(a=this.options.range)?a:[0,d3.max(t)]).range([this.height-this.margins.top-this.margins.bottom,0])},i.prototype.draw=function(){var t,n,e,r,o,s,a,h;return o=[this.x(),this.y(),this.getVisibleLayers()],a=o[0],h=o[1],r=o[2],this.g.selectAll(".layer").remove(),0!==r.length?(t=d3.svg.area().x(function(t){return a(t.x)}).y0(function(t){return h(t.y0)}).y1(function(t){return h(t.y0+t.y)}),s=d3.layout.stack().values(function(t){return t.values}),n=s(r),e=this.g.selectAll(".layer").data(r,function(t){return t.category}),e.select(".area").attr("d",function(i){return t(i.values)}),e.enter().append("g").attr("class",function(t){return t.className}),e.append("path").attr("class","area").attr("d",function(i){return t(i.values)}),i.__super__.draw.call(this)):void 0},i}(Epoch.Chart.Plot);var extend=function(t,i){function n(){this.constructor=t}for(var e in i)hasProp.call(i,e)&&(t[e]=i[e]);return n.prototype=i.prototype,t.prototype=new n,t.__super__=i.prototype,t},hasProp={}.hasOwnProperty;Epoch.Chart.Bar=function(t){function i(t){this.options=null!=t?t:{},this._isHorizontal()?this.options=Epoch.Util.defaults(this.options,e):this.options=Epoch.Util.defaults(this.options,n),i.__super__.constructor.call(this,this.options),this.onAll(o),this.draw()}var n,e,r,o;return extend(i,t),n={type:"bar",style:"grouped",orientation:"vertical",padding:{bar:.08,group:.1},outerPadding:{bar:.08,group:.1}},r={tickFormats:{top:Epoch.Formats.si,bottom:Epoch.Formats.si,left:Epoch.Formats.regular,right:Epoch.Formats.regular}},e=Epoch.Util.defaults(r,n),o={"option:orientation":"orientationChanged","option:padding":"paddingChanged","option:outerPadding":"paddingChanged","option:padding:bar":"paddingChanged","option:padding:group":"paddingChanged","option:outerPadding:bar":"paddingChanged","option:outerPadding:group":"paddingChanged"},i.prototype._isVertical=function(){return"vertical"===this.options.orientation},i.prototype._isHorizontal=function(){return"horizontal"===this.options.orientation},i.prototype.x=function(){var t;return this._isVertical()?d3.scale.ordinal().domain(Epoch.Util.domain(this.getVisibleLayers())).rangeRoundBands([0,this.innerWidth()],this.options.padding.group,this.options.outerPadding.group):(t=this.extent(function(t){return t.y}),t[0]=Math.min(0,t[0]),d3.scale.linear().domain(t).range([0,this.width-this.margins.left-this.margins.right]))},i.prototype.x1=function(t){var i;return d3.scale.ordinal().domain(function(){var t,n,e,r;for(e=this.getVisibleLayers(),r=[],t=0,n=e.length;n>t;t++)i=e[t],r.push(i.category);return r}.call(this)).rangeRoundBands([0,t.rangeBand()],this.options.padding.bar,this.options.outerPadding.bar)},i.prototype.y=function(){var t;return this._isVertical()?(t=this.extent(function(t){return t.y}),t[0]=Math.min(0,t[0]),d3.scale.linear().domain(t).range([this.height-this.margins.top-this.margins.bottom,0])):d3.scale.ordinal().domain(Epoch.Util.domain(this.getVisibleLayers())).rangeRoundBands([0,this.innerHeight()],this.options.padding.group,this.options.outerPadding.group)},i.prototype.y1=function(t){var i;return d3.scale.ordinal().domain(function(){var t,n,e,r;for(e=this.getVisibleLayers(),r=[],t=0,n=e.length;n>t;t++)i=e[t],r.push(i.category);return r}.call(this)).rangeRoundBands([0,t.rangeBand()],this.options.padding.bar,this.options.outerPadding.bar)},i.prototype._remapData=function(){var t,i,n,e,r,o,s,a,h,p,l,u,c,g;for(h={},l=this.getVisibleLayers(),n=0,s=l.length;s>n;n++)for(o=l[n],t="bar "+o.className.replace(/\s*layer\s*/,""),u=o.values,r=0,a=u.length;a>r;r++)i=u[r],null==h[p=i.x]&&(h[p]=[]),h[i.x].push({label:o.category,y:i.y,className:t});c=[];for(e in h)hasProp.call(h,e)&&(g=h[e],c.push({group:e,values:g}));return c},i.prototype.draw=function(){return this._isVertical()?this._drawVertical():this._drawHorizontal(),i.__super__.draw.call(this)},i.prototype._drawVertical=function(){var t,i,n,e,r,o,s,a;return r=[this.x(),this.y()],o=r[0],a=r[1],s=this.x1(o),i=this.height-this.margins.top-this.margins.bottom,t=this._remapData(),n=this.g.selectAll(".layer").data(t,function(t){return t.group}),n.transition().duration(750).attr("transform",function(t){return"translate("+o(t.group)+", 0)"}),n.enter().append("g").attr("class","layer").attr("transform",function(t){return"translate("+o(t.group)+", 0)"}),e=n.selectAll("rect").data(function(t){return t.values}),e.attr("class",function(t){return t.className}),e.transition().duration(600).attr("x",function(t){return s(t.label)}).attr("y",function(t){return a(t.y)}).attr("width",s.rangeBand()).attr("height",function(t){return i-a(t.y)}),e.enter().append("rect").attr("class",function(t){return t.className}).attr("x",function(t){return s(t.label)}).attr("y",function(t){return a(t.y)}).attr("width",s.rangeBand()).attr("height",function(t){ +return i-a(t.y)}),e.exit().transition().duration(150).style("opacity","0").remove(),n.exit().transition().duration(750).style("opacity","0").remove()},i.prototype._drawHorizontal=function(){var t,i,n,e,r,o,s,a;return e=[this.x(),this.y()],o=e[0],s=e[1],a=this.y1(s),r=this.width-this.margins.left-this.margins.right,t=this._remapData(),i=this.g.selectAll(".layer").data(t,function(t){return t.group}),i.transition().duration(750).attr("transform",function(t){return"translate(0, "+s(t.group)+")"}),i.enter().append("g").attr("class","layer").attr("transform",function(t){return"translate(0, "+s(t.group)+")"}),n=i.selectAll("rect").data(function(t){return t.values}),n.attr("class",function(t){return t.className}),n.transition().duration(600).attr("x",function(t){return 0}).attr("y",function(t){return a(t.label)}).attr("height",a.rangeBand()).attr("width",function(t){return o(t.y)}),n.enter().append("rect").attr("class",function(t){return t.className}).attr("x",function(t){return 0}).attr("y",function(t){return a(t.label)}).attr("height",a.rangeBand()).attr("width",function(t){return o(t.y)}),n.exit().transition().duration(150).style("opacity","0").remove(),i.exit().transition().duration(750).style("opacity","0").remove()},i.prototype._getTickValues=function(t,i){var n,e,r,o;return null==i&&(i="x"),null==this.data[0]?[]:(o=this.data[0].values.length,e=0|Math.ceil(o/t),r=function(){var t,i,r,s;for(s=[],n=t=0,i=o,r=e;r>0?i>t:t>i;n=t+=r)s.push(this.data[0].values[n].x);return s}.call(this))},i.prototype.bottomAxis=function(){var t;return t=d3.svg.axis().scale(this.x()).orient("bottom").ticks(this.options.ticks.bottom).tickFormat(this.options.tickFormats.bottom),this._isVertical()&&null!=this.options.ticks.bottom&&t.tickValues(this._getTickValues(this.options.ticks.bottom)),t},i.prototype.topAxis=function(){var t;return t=d3.svg.axis().scale(this.x()).orient("top").ticks(this.options.ticks.top).tickFormat(this.options.tickFormats.top),this._isVertical()&&null!=this.options.ticks.top&&t.tickValues(this._getTickValues(this.options.ticks.top)),t},i.prototype.leftAxis=function(){var t;return t=d3.svg.axis().scale(this.y()).orient("left").ticks(this.options.ticks.left).tickFormat(this.options.tickFormats.left),this._isHorizontal()&&null!=this.options.ticks.left&&t.tickValues(this._getTickValues(this.options.ticks.left)),t},i.prototype.rightAxis=function(){var t;return t=d3.svg.axis().scale(this.y()).orient("right").ticks(this.options.ticks.right).tickFormat(this.options.tickFormats.right),this._isHorizontal()&&null!=this.options.ticks.right&&t.tickValues(this._getTickValues(this.options.ticks.right)),t},i.prototype.orientationChanged=function(){var t,i,n,e;return e=this.options.tickFormats.top,t=this.options.tickFormats.bottom,i=this.options.tickFormats.left,n=this.options.tickFormats.right,this.options.tickFormats.left=e,this.options.tickFormats.right=t,this.options.tickFormats.top=i,this.options.tickFormats.bottom=n,this.draw()},i.prototype.paddingChanged=function(){return this.draw()},i}(Epoch.Chart.Plot);var extend=function(t,i){function n(){this.constructor=t}for(var e in i)hasProp.call(i,e)&&(t[e]=i[e]);return n.prototype=i.prototype,t.prototype=new n,t.__super__=i.prototype,t},hasProp={}.hasOwnProperty;Epoch.Chart.Histogram=function(t){function i(t){this.options=null!=t?t:{},i.__super__.constructor.call(this,this.options=Epoch.Util.defaults(this.options,n)),this.onAll(e),this.draw()}var n,e;return extend(i,t),n={type:"histogram",domain:[0,100],bucketRange:[0,100],buckets:10,cutOutliers:!1},e={"option:bucketRange":"bucketRangeChanged","option:buckets":"bucketsChanged","option:cutOutliers":"cutOutliersChanged"},i.prototype._prepareData=function(t){var i,n,e,r,o,s,a,h,p,l,u,c,g,d,f;for(i=(this.options.bucketRange[1]-this.options.bucketRange[0])/this.options.buckets,c=[],o=0,p=t.length;p>o;o++){for(h=t[o],n=function(){var t,i,n;for(n=[],e=t=0,i=this.options.buckets;i>=0?i>t:t>i;e=i>=0?++t:--t)n.push(0);return n}.call(this),d=h.values,a=0,l=d.length;l>a;a++)u=d[a],r=parseInt((u.x-this.options.bucketRange[0])/i),this.options.cutOutliers&&(0>r||r>=this.options.buckets)||(0>r?r=0:r>=this.options.buckets&&(r=this.options.buckets-1),n[r]+=parseInt(u.y));g={values:n.map(function(t,n){return{x:parseInt(n)*i,y:t}})};for(s in h)hasProp.call(h,s)&&(f=h[s],"values"!==s&&(g[s]=f));c.push(g)}return c},i.prototype.resetData=function(){return this.setData(this.rawData),this.draw()},i.prototype.bucketRangeChanged=function(){return this.resetData()},i.prototype.bucketsChanged=function(){return this.resetData()},i.prototype.cutOutliersChanged=function(){return this.resetData()},i}(Epoch.Chart.Bar);var extend=function(t,i){function n(){this.constructor=t}for(var e in i)hasProp.call(i,e)&&(t[e]=i[e]);return n.prototype=i.prototype,t.prototype=new n,t.__super__=i.prototype,t},hasProp={}.hasOwnProperty;Epoch.Chart.Line=function(t){function i(t){var n;this.options=null!=t?t:{},null==(n=this.options).type&&(n.type="line"),i.__super__.constructor.call(this,this.options),this.draw()}return extend(i,t),i.prototype.line=function(t){var i,n,e;return i=[this.x(),this.y(t.range)],n=i[0],e=i[1],d3.svg.line().x(function(t){return n(t.x)}).y(function(t){return e(t.y)})},i.prototype.draw=function(){var t,n,e,r,o;return e=[this.x(),this.y(),this.getVisibleLayers()],r=e[0],o=e[1],n=e[2],0===n.length?this.g.selectAll(".layer").remove():(t=this.g.selectAll(".layer").data(n,function(t){return t.category}),t.select(".line").transition().duration(500).attr("d",function(t){return function(i){return t.line(i)(i.values)}}(this)),t.enter().append("g").attr("class",function(t){return t.className}).append("path").attr("class","line").attr("d",function(t){return function(i){return t.line(i)(i.values)}}(this)),t.exit().transition().duration(750).style("opacity","0").remove(),i.__super__.draw.call(this))},i}(Epoch.Chart.Plot);var extend=function(t,i){function n(){this.constructor=t}for(var e in i)hasProp.call(i,e)&&(t[e]=i[e]);return n.prototype=i.prototype,t.prototype=new n,t.__super__=i.prototype,t},hasProp={}.hasOwnProperty;Epoch.Chart.Pie=function(t){function i(t){this.options=null!=t?t:{},i.__super__.constructor.call(this,this.options=Epoch.Util.defaults(this.options,n)),this.pie=d3.layout.pie().sort(null).value(function(t){return t.value}),this.arc=d3.svg.arc().outerRadius(function(t){return function(){return Math.max(t.width,t.height)/2-t.options.margin}}(this)).innerRadius(function(t){return function(){return t.options.inner}}(this)),this.g=this.svg.append("g").attr("transform","translate("+this.width/2+", "+this.height/2+")"),this.on("option:margin","marginChanged"),this.on("option:inner","innerChanged"),this.draw()}var n;return extend(i,t),n={type:"pie",margin:10,inner:0},i.prototype.draw=function(){var t,n,e;return this.g.selectAll(".arc").remove(),t=this.g.selectAll(".arc").data(this.pie(this.getVisibleLayers()),function(t){return t.data.category}),t.enter().append("g").attr("class",function(t){return"arc pie "+t.data.className}),t.select("path").attr("d",this.arc),t.select("text").attr("transform",function(t){return function(i){return"translate("+t.arc.centroid(i)+")"}}(this)).text(function(t){return t.data.label||t.data.category}),n=t.append("path").attr("d",this.arc).each(function(t){return this._current=t}),e=t.append("text").attr("transform",function(t){return function(i){return"translate("+t.arc.centroid(i)+")"}}(this)).attr("dy",".35em").style("text-anchor","middle").text(function(t){return t.data.label||t.data.category}),i.__super__.draw.call(this)},i.prototype.marginChanged=function(){return this.draw()},i.prototype.innerChanged=function(){return this.draw()},i}(Epoch.Chart.SVG);var extend=function(t,i){function n(){this.constructor=t}for(var e in i)hasProp.call(i,e)&&(t[e]=i[e]);return n.prototype=i.prototype,t.prototype=new n,t.__super__=i.prototype,t},hasProp={}.hasOwnProperty;Epoch.Chart.Scatter=function(t){function i(t){this.options=null!=t?t:{},i.__super__.constructor.call(this,this.options=Epoch.Util.defaults(this.options,n)),this.on("option:radius","radiusChanged"),this.draw()}var n;return extend(i,t),n={type:"scatter",radius:3.5,axes:["top","bottom","left","right"]},i.prototype.draw=function(){var t,n,e,r,o,s,a;return o=[this.x(),this.y(),this.getVisibleLayers()],s=o[0],a=o[1],e=o[2],r=this.options.radius,0===e.length?this.g.selectAll(".layer").remove():(n=this.g.selectAll(".layer").data(e,function(t){return t.category}),n.enter().append("g").attr("class",function(t){return t.className}),t=n.selectAll(".dot").data(function(t){return t.values}),t.transition().duration(500).attr("r",function(t){var i;return null!=(i=t.r)?i:r}).attr("cx",function(t){return s(t.x)}).attr("cy",function(t){return a(t.y)}),t.enter().append("circle").attr("class","dot").attr("r",function(t){var i;return null!=(i=t.r)?i:r}).attr("cx",function(t){return s(t.x)}).attr("cy",function(t){return a(t.y)}),t.exit().transition().duration(750).style("opacity",0).remove(),n.exit().transition().duration(750).style("opacity",0).remove(),i.__super__.draw.call(this))},i.prototype.radiusChanged=function(){return this.draw()},i}(Epoch.Chart.Plot);var extend=function(t,i){function n(){this.constructor=t}for(var e in i)hasProp.call(i,e)&&(t[e]=i[e]);return n.prototype=i.prototype,t.prototype=new n,t.__super__=i.prototype,t},hasProp={}.hasOwnProperty;Epoch.Time.Plot=function(t){function i(t){var o,s,a,h,p;for(this.options=t,o=Epoch.Util.copy(this.options.margins)||{},i.__super__.constructor.call(this,this.options=Epoch.Util.defaults(this.options,e)),this.options.model&&this.options.model.on("data:push",function(t){return function(){return t.pushFromModel()}}(this)),this._queue=[],this.margins={},p=["top","right","bottom","left"],s=0,a=p.length;a>s;s++)h=p[s],this.margins[h]=null!=this.options.margins&&null!=this.options.margins[h]?this.options.margins[h]:this.hasAxis(h)?n[h]:6;this.svg=this.el.insert("svg",":first-child").attr("width",this.width).attr("height",this.height).style("z-index","1000"),"absolute"!==this.el.style("position")&&"relative"!==this.el.style("position")&&this.el.style("position","relative"),this.canvas.style({position:"absolute","z-index":"999"}),this._sizeCanvas(),this.animation={interval:null,active:!1,delta:function(t){return function(){return-(t.w()/t.options.fps)}}(this),tickDelta:function(t){return function(){return-(t.w()/t.pixelRatio/t.options.fps)}}(this),frame:0,duration:this.options.fps},this._buildAxes(),this.animationCallback=function(t){return function(){return t._animate()}}(this),this.onAll(r)}var n,e,r;return extend(i,t),e={range:null,fps:24,historySize:120,windowSize:40,queueSize:10,axes:["bottom"],ticks:{time:15,left:5,right:5},tickFormats:{top:Epoch.Formats.seconds,bottom:Epoch.Formats.seconds,left:Epoch.Formats.si,right:Epoch.Formats.si}},n={top:25,right:50,bottom:25,left:50},r={"option:margins":"marginsChanged","option:margins.top":"marginsChanged","option:margins.right":"marginsChanged","option:margins.bottom":"marginsChanged","option:margins.left":"marginsChanged","option:axes":"axesChanged","option:ticks":"ticksChanged","option:ticks.top":"ticksChanged","option:ticks.right":"ticksChanged","option:ticks.bottom":"ticksChanged","option:ticks.left":"ticksChanged","option:tickFormats":"tickFormatsChanged","option:tickFormats.top":"tickFormatsChanged","option:tickFormats.right":"tickFormatsChanged","option:tickFormats.bottom":"tickFormatsChanged","option:tickFormats.left":"tickFormatsChanged"},i.prototype._sizeCanvas=function(){return this.canvas.attr({width:this.innerWidth(),height:this.innerHeight()}),this.canvas.style({width:this.innerWidth()/this.pixelRatio+"px",height:this.innerHeight()/this.pixelRatio+"px",top:this.margins.top+"px",left:this.margins.left+"px"})},i.prototype._buildAxes=function(){return this.svg.selectAll(".axis").remove(),this._prepareTimeAxes(),this._prepareRangeAxes()},i.prototype._annotateLayers=function(t){var i,n,e,r,o,s;e=[];for(r in t)hasProp.call(t,r)&&(o=t[r],n=Epoch.Util.copy(o),s=Math.max(0,o.values.length-this.options.historySize),n.values=o.values.slice(s),i=["layer"],i.push("category"+((0|r)+1)),null!=o.label&&i.push(Epoch.Util.dasherize(o.label)),n.className=i.join(" "),n.visible=!0,e.push(n));return e},i.prototype._offsetX=function(){return 0},i.prototype._prepareTimeAxes=function(){var t;return this.hasAxis("bottom")&&(t=this.bottomAxis=this.svg.append("g").attr("class","x axis bottom canvas").attr("transform","translate("+(this.margins.left-1)+", "+(this.innerHeight()/this.pixelRatio+this.margins.top)+")"),t.append("path").attr("class","domain").attr("d","M0,0H"+(this.innerWidth()/this.pixelRatio+1))),this.hasAxis("top")&&(t=this.topAxis=this.svg.append("g").attr("class","x axis top canvas").attr("transform","translate("+(this.margins.left-1)+", "+this.margins.top+")"),t.append("path").attr("class","domain").attr("d","M0,0H"+(this.innerWidth()/this.pixelRatio+1))),this._resetInitialTimeTicks()},i.prototype._resetInitialTimeTicks=function(){var t,i,n,e,r,o,s,a,h;for(h=this.options.ticks.time,this._ticks=[],this._tickTimer=h,null!=this.bottomAxis&&this.bottomAxis.selectAll(".tick").remove(),null!=this.topAxis&&this.topAxis.selectAll(".tick").remove(),o=this.data,a=[],n=0,r=o.length;r>n;n++)if(e=o[n],Epoch.isNonEmptyArray(e.values)){for(s=[this.options.windowSize-1,e.values.length-1],t=s[0],i=s[1];t>=0&&i>=0;)this._pushTick(t,e.values[i].time,!1,!0),t-=h,i-=h;break}return a},i.prototype._prepareRangeAxes=function(){return this.hasAxis("left")&&this.svg.append("g").attr("class","y axis left").attr("transform","translate("+(this.margins.left-1)+", "+this.margins.top+")").call(this.leftAxis()),this.hasAxis("right")?this.svg.append("g").attr("class","y axis right").attr("transform","translate("+(this.width-this.margins.right)+", "+this.margins.top+")").call(this.rightAxis()):void 0},i.prototype.leftAxis=function(){var t,i;return i=this.options.ticks.left,t=d3.svg.axis().scale(this.ySvgLeft()).orient("left").tickFormat(this.options.tickFormats.left),2===i?t.tickValues(this.extent(function(t){return t.y})):t.ticks(i)},i.prototype.rightAxis=function(){var t,i,n;return i=this.extent(function(t){return t.y}),n=this.options.ticks.right,t=d3.svg.axis().scale(this.ySvgRight()).orient("right").tickFormat(this.options.tickFormats.right),2===n?t.tickValues(this.extent(function(t){return t.y})):t.ticks(n)},i.prototype.hasAxis=function(t){return this.options.axes.indexOf(t)>-1},i.prototype.innerWidth=function(){return(this.width-(this.margins.left+this.margins.right))*this.pixelRatio},i.prototype.innerHeight=function(){return(this.height-(this.margins.top+this.margins.bottom))*this.pixelRatio},i.prototype._prepareEntry=function(t){return t},i.prototype._prepareLayers=function(t){return t},i.prototype._startTransition=function(){return this.animation.active!==!0&&0!==this._queue.length?(this.trigger("transition:start"),this._shift(),this.animation.active=!0,this.animation.interval=setInterval(this.animationCallback,1e3/this.options.fps)):void 0},i.prototype._stopTransition=function(){var t,i,n,e,r,o,s;if(this.inTransition()){for(o=this.data,i=0,r=o.length;r>i;i++)e=o[i],e.values.length>this.options.windowSize+1&&e.values.shift();return s=[this._ticks[0],this._ticks[this._ticks.length-1]],t=s[0],n=s[1],null!=n&&n.enter&&(n.enter=!1,n.opacity=1),null!=t&&t.exit&&this._shiftTick(),this.animation.frame=0,this.trigger("transition:end"),this._queue.length>0?this._shift():(this.animation.active=!1,clearInterval(this.animation.interval))}},i.prototype.inTransition=function(){return this.animation.active},i.prototype.push=function(t){return t=this._prepareLayers(t),this._queue.length>this.options.queueSize&&this._queue.splice(this.options.queueSize,this._queue.length-this.options.queueSize),this._queue.length===this.options.queueSize?!1:(this._queue.push(t.map(function(t){return function(i){return t._prepareEntry(i)}}(this))),this.trigger("push"),this.inTransition()?void 0:this._startTransition())},i.prototype.pushFromModel=function(){return this.push(this.options.model.getNext(this.options.type,this.options.dataFormat))},i.prototype._shift=function(){var t,i,n,e;this.trigger("before:shift"),t=this._queue.shift(),e=this.data;for(i in e)hasProp.call(e,i)&&(n=e[i],n.values.push(t[i]));return this._updateTicks(t[0].time),this._transitionRangeAxes(),this.trigger("after:shift")},i.prototype._transitionRangeAxes=function(){return this.hasAxis("left")&&this.svg.selectAll(".y.axis.left").transition().duration(500).ease("linear").call(this.leftAxis()),this.hasAxis("right")?this.svg.selectAll(".y.axis.right").transition().duration(500).ease("linear").call(this.rightAxis()):void 0},i.prototype._animate=function(){return this.inTransition()?(++this.animation.frame===this.animation.duration&&this._stopTransition(),this.draw(this.animation.frame*this.animation.delta()),this._updateTimeAxes()):void 0},i.prototype.y=function(t){return d3.scale.linear().domain(this._getScaleDomain(t)).range([this.innerHeight(),0])},i.prototype.ySvg=function(t){return d3.scale.linear().domain(this._getScaleDomain(t)).range([this.innerHeight()/this.pixelRatio,0])},i.prototype.ySvgLeft=function(){return null!=this.options.range?this.ySvg(this.options.range.left):this.ySvg()},i.prototype.ySvgRight=function(){return null!=this.options.range?this.ySvg(this.options.range.right):this.ySvg()},i.prototype.w=function(){return this.innerWidth()/this.options.windowSize},i.prototype._updateTicks=function(t){return(this.hasAxis("top")||this.hasAxis("bottom"))&&(++this._tickTimer%this.options.ticks.time||this._pushTick(this.options.windowSize,t,!0),this._ticks.length>0)?this._ticks[0].x-this.w()/this.pixelRatio>=0?void 0:this._ticks[0].exit=!0:void 0},i.prototype._pushTick=function(t,i,n,e){var r,o;return null==n&&(n=!1),null==e&&(e=!1),this.hasAxis("top")||this.hasAxis("bottom")?(o={time:i,x:t*(this.w()/this.pixelRatio)+this._offsetX(),opacity:n?0:1,enter:n?!0:!1,exit:!1},this.hasAxis("bottom")&&(r=this.bottomAxis.append("g").attr("class","tick major").attr("transform","translate("+(o.x+1)+",0)").style("opacity",o.opacity),r.append("line").attr("y2",6),r.append("text").attr("text-anchor","middle").attr("dy",19).text(this.options.tickFormats.bottom(o.time)),o.bottomEl=r),this.hasAxis("top")&&(r=this.topAxis.append("g").attr("class","tick major").attr("transform","translate("+(o.x+1)+",0)").style("opacity",o.opacity),r.append("line").attr("y2",-6),r.append("text").attr("text-anchor","middle").attr("dy",-10).text(this.options.tickFormats.top(o.time)),o.topEl=r),e?this._ticks.unshift(o):this._ticks.push(o),o):void 0},i.prototype._shiftTick=function(){var t;if(this._ticks.length>0)return t=this._ticks.shift(),null!=t.topEl&&t.topEl.remove(),null!=t.bottomEl?t.bottomEl.remove():void 0},i.prototype._updateTimeAxes=function(){var t,i,n,e,r,o,s,a;if(this.hasAxis("top")||this.hasAxis("bottom")){for(r=[this.animation.tickDelta(),1/this.options.fps],i=r[0],t=r[1],o=this._ticks,s=[],n=0,e=o.length;e>n;n++)a=o[n],a.x+=i,this.hasAxis("bottom")&&a.bottomEl.attr("transform","translate("+(a.x+1)+",0)"),this.hasAxis("top")&&a.topEl.attr("transform","translate("+(a.x+1)+",0)"),a.enter?a.opacity+=t:a.exit&&(a.opacity-=t),a.enter||a.exit?(this.hasAxis("bottom")&&a.bottomEl.style("opacity",a.opacity),this.hasAxis("top")?s.push(a.topEl.style("opacity",a.opacity)):s.push(void 0)):s.push(void 0);return s}},i.prototype.draw=function(t){return null==t&&(t=0),i.__super__.draw.call(this)},i.prototype.dimensionsChanged=function(){return i.__super__.dimensionsChanged.call(this),this.svg.attr("width",this.width).attr("height",this.height),this._sizeCanvas(),this._buildAxes(),this.draw(this.animation.frame*this.animation.delta())},i.prototype.axesChanged=function(){var t,i,e,r;for(r=["top","right","bottom","left"],t=0,i=r.length;i>t;t++)e=r[t],(null==this.options.margins||null==this.options.margins[e])&&(this.hasAxis(e)?this.margins[e]=n[e]:this.margins[e]=6);return this._sizeCanvas(),this._buildAxes(),this.draw(this.animation.frame*this.animation.delta())},i.prototype.ticksChanged=function(){return this._resetInitialTimeTicks(),this._transitionRangeAxes(),this.draw(this.animation.frame*this.animation.delta())},i.prototype.tickFormatsChanged=function(){return this._resetInitialTimeTicks(),this._transitionRangeAxes(),this.draw(this.animation.frame*this.animation.delta())},i.prototype.marginsChanged=function(){var t,i,n;if(null!=this.options.margins){i=this.options.margins;for(t in i)hasProp.call(i,t)&&(n=i[t],null==n?this.margins[t]=6:this.margins[t]=n);return this._sizeCanvas(),this.draw(this.animation.frame*this.animation.delta())}},i.prototype.layerChanged=function(){return this._transitionRangeAxes(),i.__super__.layerChanged.call(this)},i}(Epoch.Chart.Canvas),Epoch.Time.Stack=function(t){function i(){return i.__super__.constructor.apply(this,arguments)}return extend(i,t),i.prototype._stackLayers=function(){var t,i,n,e,r,o,s;if((e=this.getVisibleLayers()).length>0){for(o=[],t=i=0,r=e[0].values.length;r>=0?r>i:i>r;t=r>=0?++i:--i)s=0,o.push(function(){var i,r,o;for(o=[],r=0,i=e.length;i>r;r++)n=e[r],n.values[t].y0=s,o.push(s+=n.values[t].y);return o}());return o}},i.prototype._prepareLayers=function(t){var i,n,e;e=0;for(n in t)hasProp.call(t,n)&&(i=t[n],this.data[n].visible&&(i.y0=e,e+=i.y));return t},i.prototype.setData=function(t){return i.__super__.setData.call(this,t),this._stackLayers()},i.prototype.extent=function(){var t,i,n,e,r,o,s,a,h,p;if(s=[0,this.getVisibleLayers()],o=s[0],e=s[1],!e.length)return[0,0];for(t=n=0,a=e[0].values.length;a>=0?a>n:n>a;t=a>=0?++n:--n){for(p=0,i=r=0,h=e.length;h>=0?h>r:r>h;i=h>=0?++r:--r)p+=e[i].values[t].y;p>o&&(o=p)}return[0,o]},i.prototype.layerChanged=function(){var t,n,e,r;for(this._stackLayers(),r=this._queue,t=0,e=r.length;e>t;t++)n=r[t],this._prepareLayers(n);return i.__super__.layerChanged.call(this)},i}(Epoch.Time.Plot);var extend=function(t,i){function n(){this.constructor=t}for(var e in i)hasProp.call(i,e)&&(t[e]=i[e]);return n.prototype=i.prototype,t.prototype=new n,t.__super__=i.prototype,t},hasProp={}.hasOwnProperty;Epoch.Time.Area=function(t){function i(t){var n;this.options=null!=t?t:{},null==(n=this.options).type&&(n.type="time.area"),i.__super__.constructor.call(this,this.options),this.draw()}return extend(i,t),i.prototype.setStyles=function(t){var i;return i=null!=t&&null!=t.className?this.getStyles("g."+t.className.replace(/\s/g,".")+" path.area"):this.getStyles("g path.area"),this.ctx.fillStyle=i.fill,null!=i.stroke&&(this.ctx.strokeStyle=i.stroke),null!=i["stroke-width"]?this.ctx.lineWidth=i["stroke-width"].replace("px",""):void 0},i.prototype._drawAreas=function(t){var i,n,e,r,o,s,a,h,p,l,u,c,g,d,f,y,m;for(null==t&&(t=0),u=[this.y(),this.w(),this.getVisibleLayers()],m=u[0],y=u[1],l=u[2],d=[],o=h=c=l.length-1;0>=c?0>=h:h>=0;o=0>=c?++h:--h)if(p=l[o]){for(this.setStyles(p),this.ctx.beginPath(),g=[this.options.windowSize,p.values.length,this.inTransition()],s=g[0],a=g[1],f=g[2],r=null;--s>=-2&&--a>=0;)e=p.values[a],i=[(s+1)*y+t,m(e.y+e.y0)],f&&(i[0]+=y),o===this.options.windowSize-1?this.ctx.moveTo.apply(this.ctx,i):this.ctx.lineTo.apply(this.ctx,i);n=f?(s+3)*y+t:(s+2)*y+t,this.ctx.lineTo(n,this.innerHeight()),this.ctx.lineTo(this.width*this.pixelRatio+y+t,this.innerHeight()),this.ctx.closePath(),d.push(this.ctx.fill())}return d},i.prototype._drawStrokes=function(t){var i,n,e,r,o,s,a,h,p,l,u,c,g,d,f;for(null==t&&(t=0),p=[this.y(),this.w(),this.getVisibleLayers()],f=p[0],d=p[1],h=p[2],c=[],r=s=l=h.length-1;0>=l?0>=s:s>=0;r=0>=l?++s:--s)if(a=h[r]){for(this.setStyles(a),this.ctx.beginPath(),u=[this.options.windowSize,a.values.length,this.inTransition()],r=u[0],o=u[1],g=u[2],e=null;--r>=-2&&--o>=0;)n=a.values[o],i=[(r+1)*d+t,f(n.y+n.y0)],g&&(i[0]+=d),r===this.options.windowSize-1?this.ctx.moveTo.apply(this.ctx,i):this.ctx.lineTo.apply(this.ctx,i);c.push(this.ctx.stroke())}return c},i.prototype.draw=function(t){return null==t&&(t=0),this.clear(),this._drawAreas(t),this._drawStrokes(t),i.__super__.draw.call(this)},i}(Epoch.Time.Stack);var extend=function(t,i){function n(){this.constructor=t}for(var e in i)hasProp.call(i,e)&&(t[e]=i[e]);return n.prototype=i.prototype,t.prototype=new n,t.__super__=i.prototype,t},hasProp={}.hasOwnProperty;Epoch.Time.Bar=function(t){function i(t){var n;this.options=null!=t?t:{},null==(n=this.options).type&&(n.type="time.bar"),i.__super__.constructor.call(this,this.options),this.draw()}return extend(i,t),i.prototype._offsetX=function(){return.5*this.w()/this.pixelRatio},i.prototype.setStyles=function(t){var i;return i=this.getStyles("rect.bar."+t.replace(/\s/g,".")),this.ctx.fillStyle=i.fill,null==i.stroke||"none"===i.stroke?this.ctx.strokeStyle="transparent":this.ctx.strokeStyle=i.stroke,null!=i["stroke-width"]?this.ctx.lineWidth=i["stroke-width"].replace("px",""):void 0},i.prototype.draw=function(t){var 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n,t.__super__=i.prototype,t},hasProp={}.hasOwnProperty;Epoch.Time.Heatmap=function(t){function i(t){this.options=null!=t?t:{},i.__super__.constructor.call(this,this.options=Epoch.Util.defaults(this.options,e)),this._setOpacityFunction(),this._setupPaintCanvas(),this.onAll(r),this.draw()}var n,e,r;return extend(i,t),e={type:"time.heatmap",buckets:10,bucketRange:[0,100],opacity:"linear",bucketPadding:2,paintZeroValues:!1,cutOutliers:!1},n={root:function(t,i){return Math.pow(t/i,.5)},linear:function(t,i){return t/i},quadratic:function(t,i){return Math.pow(t/i,2)},cubic:function(t,i){return Math.pow(t/i,3)},quartic:function(t,i){return Math.pow(t/i,4)},quintic:function(t,i){return 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