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-rw-r--r--lib/dns/dnstap.c1251
1 files changed, 1251 insertions, 0 deletions
diff --git a/lib/dns/dnstap.c b/lib/dns/dnstap.c
new file mode 100644
index 0000000..ab3bd74
--- /dev/null
+++ b/lib/dns/dnstap.c
@@ -0,0 +1,1251 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*
+ * Copyright (c) 2013-2014, Farsight Security, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*! \file */
+
+#include <config.h>
+
+#ifndef HAVE_DNSTAP
+#error DNSTAP not configured.
+#endif /* HAVE_DNSTAP */
+
+#include <inttypes.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include <isc/buffer.h>
+#include <isc/file.h>
+#include <isc/mem.h>
+#include <isc/once.h>
+#include <isc/print.h>
+#include <isc/sockaddr.h>
+#include <isc/thread.h>
+#include <isc/time.h>
+#include <isc/types.h>
+#include <isc/util.h>
+
+#include <dns/dnstap.h>
+#include <dns/log.h>
+#include <dns/message.h>
+#include <dns/name.h>
+#include <dns/rdataset.h>
+#include <dns/result.h>
+#include <dns/stats.h>
+#include <dns/types.h>
+#include <dns/view.h>
+
+#include <dns/dnstap.pb-c.h>
+#include <protobuf-c/protobuf-c.h>
+
+#define DTENV_MAGIC ISC_MAGIC('D', 't', 'n', 'v')
+#define VALID_DTENV(env) ISC_MAGIC_VALID(env, DTENV_MAGIC)
+
+#define DNSTAP_CONTENT_TYPE "protobuf:dnstap.Dnstap"
+#define DNSTAP_INITIAL_BUF_SIZE 256
+
+struct dns_dtmsg {
+ void *buf;
+ size_t len;
+ Dnstap__Dnstap d;
+ Dnstap__Message m;
+};
+
+struct dns_dthandle {
+ dns_dtmode_t mode;
+ struct fstrm_reader *reader;
+ isc_mem_t *mctx;
+};
+
+struct dns_dtenv {
+ unsigned int magic;
+ isc_refcount_t refcount;
+
+ isc_mem_t *mctx;
+
+ struct fstrm_iothr *iothr;
+ struct fstrm_iothr_options *fopt;
+
+ isc_region_t identity;
+ isc_region_t version;
+ char *path;
+ dns_dtmode_t mode;
+ isc_stats_t *stats;
+};
+
+#define CHECK(x) do { \
+ result = (x); \
+ if (result != ISC_R_SUCCESS) \
+ goto cleanup; \
+ } while (0)
+
+static isc_mutex_t dt_mutex;
+static bool dt_initialized = false;
+static isc_thread_key_t dt_key;
+static isc_once_t mutex_once = ISC_ONCE_INIT;
+static isc_mem_t *dt_mctx = NULL;
+
+/*
+ * Change under task exclusive.
+ */
+static unsigned int generation;
+
+static void
+mutex_init(void) {
+ RUNTIME_CHECK(isc_mutex_init(&dt_mutex) == ISC_R_SUCCESS);
+}
+
+static void
+dtfree(void *arg) {
+ free(arg);
+ isc_thread_key_setspecific(dt_key, NULL);
+}
+
+static isc_result_t
+dt_init(void) {
+ isc_result_t result;
+
+ result = isc_once_do(&mutex_once, mutex_init);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+
+ if (dt_initialized)
+ return (ISC_R_SUCCESS);
+
+ LOCK(&dt_mutex);
+ if (!dt_initialized) {
+ int ret;
+
+ if (dt_mctx == NULL)
+ result = isc_mem_create2(0, 0, &dt_mctx, 0);
+ if (result != ISC_R_SUCCESS)
+ goto unlock;
+ isc_mem_setname(dt_mctx, "dt", NULL);
+ isc_mem_setdestroycheck(dt_mctx, false);
+
+ ret = isc_thread_key_create(&dt_key, dtfree);
+ if (ret == 0)
+ dt_initialized = true;
+ else
+ result = ISC_R_FAILURE;
+ }
+unlock:
+ UNLOCK(&dt_mutex);
+
+ return (result);
+}
+
+isc_result_t
+dns_dt_create(isc_mem_t *mctx, dns_dtmode_t mode, const char *path,
+ struct fstrm_iothr_options **foptp, dns_dtenv_t **envp)
+{
+ isc_result_t result = ISC_R_SUCCESS;
+ fstrm_res res;
+ struct fstrm_unix_writer_options *fuwopt = NULL;
+ struct fstrm_file_options *ffwopt = NULL;
+ struct fstrm_writer_options *fwopt = NULL;
+ struct fstrm_writer *fw = NULL;
+ dns_dtenv_t *env = NULL;
+
+ REQUIRE(path != NULL);
+ REQUIRE(envp != NULL && *envp == NULL);
+ REQUIRE(foptp!= NULL && *foptp != NULL);
+
+ isc_log_write(dns_lctx, DNS_LOGCATEGORY_DNSTAP,
+ DNS_LOGMODULE_DNSTAP, ISC_LOG_INFO,
+ "opening dnstap destination '%s'", path);
+
+ generation++;
+
+ env = isc_mem_get(mctx, sizeof(dns_dtenv_t));
+ if (env == NULL)
+ CHECK(ISC_R_NOMEMORY);
+
+ memset(env, 0, sizeof(dns_dtenv_t));
+
+ CHECK(isc_refcount_init(&env->refcount, 1));
+ CHECK(isc_stats_create(mctx, &env->stats, dns_dnstapcounter_max));
+ env->path = isc_mem_strdup(mctx, path);
+ if (env->path == NULL)
+ CHECK(ISC_R_NOMEMORY);
+
+ fwopt = fstrm_writer_options_init();
+ if (fwopt == NULL)
+ CHECK(ISC_R_NOMEMORY);
+
+ res = fstrm_writer_options_add_content_type(fwopt,
+ DNSTAP_CONTENT_TYPE,
+ sizeof(DNSTAP_CONTENT_TYPE) - 1);
+ if (res != fstrm_res_success)
+ CHECK(ISC_R_FAILURE);
+
+ if (mode == dns_dtmode_file) {
+ ffwopt = fstrm_file_options_init();
+ if (ffwopt != NULL) {
+ fstrm_file_options_set_file_path(ffwopt, env->path);
+ fw = fstrm_file_writer_init(ffwopt, fwopt);
+ }
+ } else if (mode == dns_dtmode_unix) {
+ fuwopt = fstrm_unix_writer_options_init();
+ if (fuwopt != NULL) {
+ fstrm_unix_writer_options_set_socket_path(fuwopt,
+ env->path);
+ fw = fstrm_unix_writer_init(fuwopt, fwopt);
+ }
+ } else
+ CHECK(ISC_R_FAILURE);
+
+ if (fw == NULL)
+ CHECK(ISC_R_FAILURE);
+
+ env->iothr = fstrm_iothr_init(*foptp, &fw);
+ if (env->iothr == NULL) {
+ isc_log_write(dns_lctx, DNS_LOGCATEGORY_DNSTAP,
+ DNS_LOGMODULE_DNSTAP, ISC_LOG_WARNING,
+ "unable to initialize dnstap I/O thread");
+ fstrm_writer_destroy(&fw);
+ CHECK(ISC_R_FAILURE);
+ }
+ env->mode = mode;
+ env->fopt = *foptp;
+ *foptp = NULL;
+
+ isc_mem_attach(mctx, &env->mctx);
+
+ env->magic = DTENV_MAGIC;
+ *envp = env;
+
+ cleanup:
+ if (ffwopt != NULL)
+ fstrm_file_options_destroy(&ffwopt);
+
+ if (fuwopt != NULL)
+ fstrm_unix_writer_options_destroy(&fuwopt);
+
+ if (fwopt != NULL)
+ fstrm_writer_options_destroy(&fwopt);
+
+ if (result != ISC_R_SUCCESS) {
+ if (env != NULL) {
+ if (env->mctx != NULL)
+ isc_mem_detach(&env->mctx);
+ if (env->path != NULL)
+ isc_mem_free(mctx, env->path);
+ if (env->stats != NULL)
+ isc_stats_detach(&env->stats);
+ isc_mem_put(mctx, env, sizeof(dns_dtenv_t));
+ }
+ }
+
+ return (result);
+}
+
+isc_result_t
+dns_dt_reopen(dns_dtenv_t *env, int roll) {
+ isc_result_t result = ISC_R_SUCCESS;
+ fstrm_res res;
+ isc_logfile_t file;
+ struct fstrm_unix_writer_options *fuwopt = NULL;
+ struct fstrm_file_options *ffwopt = NULL;
+ struct fstrm_writer_options *fwopt = NULL;
+ struct fstrm_writer *fw = NULL;
+
+ REQUIRE(VALID_DTENV(env));
+
+ /*
+ * Check that we can create a new fw object.
+ */
+ fwopt = fstrm_writer_options_init();
+ if (fwopt == NULL)
+ return (ISC_R_NOMEMORY);
+
+ res = fstrm_writer_options_add_content_type(fwopt,
+ DNSTAP_CONTENT_TYPE,
+ sizeof(DNSTAP_CONTENT_TYPE) - 1);
+ if (res != fstrm_res_success)
+ CHECK(ISC_R_FAILURE);
+
+ if (env->mode == dns_dtmode_file) {
+ ffwopt = fstrm_file_options_init();
+ if (ffwopt != NULL) {
+ fstrm_file_options_set_file_path(ffwopt, env->path);
+ fw = fstrm_file_writer_init(ffwopt, fwopt);
+ }
+ } else if (env->mode == dns_dtmode_unix) {
+ fuwopt = fstrm_unix_writer_options_init();
+ if (fuwopt != NULL) {
+ fstrm_unix_writer_options_set_socket_path(fuwopt,
+ env->path);
+ fw = fstrm_unix_writer_init(fuwopt, fwopt);
+ }
+ } else
+ CHECK(ISC_R_NOTIMPLEMENTED);
+
+ if (fw == NULL)
+ CHECK(ISC_R_FAILURE);
+
+ /*
+ * We are committed here.
+ */
+ isc_log_write(dns_lctx, DNS_LOGCATEGORY_DNSTAP,
+ DNS_LOGMODULE_DNSTAP, ISC_LOG_INFO,
+ "%s dnstap destination '%s'",
+ (roll < 0) ? "reopening" : "rolling",
+ env->path);
+
+ generation++;
+
+ if (env->iothr != NULL)
+ fstrm_iothr_destroy(&env->iothr);
+
+ if (env->mode == dns_dtmode_file && roll >= 0) {
+ /*
+ * Create a temporary isc_logfile_t structure so we can
+ * take advantage of the logfile rolling facility.
+ */
+ char *filename = isc_mem_strdup(env->mctx, env->path);
+ file.name = filename;
+ file.stream = NULL;
+ file.versions = roll != 0 ? roll : ISC_LOG_ROLLINFINITE;
+ file.maximum_size = 0;
+ file.maximum_reached = false;
+ result = isc_logfile_roll(&file);
+ isc_mem_free(env->mctx, filename);
+ CHECK(result);
+ }
+
+ env->iothr = fstrm_iothr_init(env->fopt, &fw);
+ if (env->iothr == NULL) {
+ isc_log_write(dns_lctx, DNS_LOGCATEGORY_DNSTAP,
+ DNS_LOGMODULE_DNSTAP, ISC_LOG_WARNING,
+ "unable to initialize dnstap I/O thread");
+ CHECK(ISC_R_FAILURE);
+ }
+
+ cleanup:
+ if (ffwopt != NULL)
+ fstrm_file_options_destroy(&ffwopt);
+
+ if (fw != NULL)
+ fstrm_writer_destroy(&fw);
+
+ if (fwopt != NULL)
+ fstrm_writer_options_destroy(&fwopt);
+
+ if (fuwopt != NULL)
+ fstrm_unix_writer_options_destroy(&fuwopt);
+
+ return (result);
+}
+
+static isc_result_t
+toregion(dns_dtenv_t *env, isc_region_t *r, const char *str) {
+ unsigned char *p = NULL;
+
+ REQUIRE(r != NULL);
+
+ if (str != NULL) {
+ p = (unsigned char *) isc_mem_strdup(env->mctx, str);
+ if (p == NULL)
+ return (ISC_R_NOMEMORY);
+ }
+
+ if (r->base != NULL) {
+ isc_mem_free(env->mctx, r->base);
+ r->length = 0;
+ }
+
+ if (p != NULL) {
+ r->base = p;
+ r->length = strlen((char *) p);
+ }
+
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+dns_dt_setidentity(dns_dtenv_t *env, const char *identity) {
+ REQUIRE(VALID_DTENV(env));
+
+ return (toregion(env, &env->identity, identity));
+}
+
+isc_result_t
+dns_dt_setversion(dns_dtenv_t *env, const char *version) {
+ REQUIRE(VALID_DTENV(env));
+
+ return (toregion(env, &env->version, version));
+}
+
+static struct fstrm_iothr_queue *
+dt_queue(dns_dtenv_t *env) {
+ isc_result_t result;
+ struct ioq {
+ unsigned int generation;
+ struct fstrm_iothr_queue *ioq;
+ } *ioq;
+
+ REQUIRE(VALID_DTENV(env));
+
+ if (env->iothr == NULL)
+ return (NULL);
+
+ result = dt_init();
+ if (result != ISC_R_SUCCESS)
+ return (NULL);
+
+ ioq = (struct ioq *)isc_thread_key_getspecific(dt_key);
+ if (ioq != NULL && ioq->generation != generation) {
+ result = isc_thread_key_setspecific(dt_key, NULL);
+ if (result != ISC_R_SUCCESS)
+ return (NULL);
+ free(ioq);
+ ioq = NULL;
+ }
+ if (ioq == NULL) {
+ ioq = malloc(sizeof(*ioq));
+ if (ioq == NULL)
+ return (NULL);
+ ioq->generation = generation;
+ ioq->ioq = fstrm_iothr_get_input_queue(env->iothr);
+ if (ioq->ioq == NULL) {
+ free(ioq);
+ return (NULL);
+ }
+ result = isc_thread_key_setspecific(dt_key, ioq);
+ if (result != ISC_R_SUCCESS) {
+ free(ioq);
+ return (NULL);
+ }
+ }
+
+ return (ioq->ioq);
+}
+
+void
+dns_dt_attach(dns_dtenv_t *source, dns_dtenv_t **destp) {
+ REQUIRE(VALID_DTENV(source));
+ REQUIRE(destp != NULL && *destp == NULL);
+
+ isc_refcount_increment(&source->refcount, NULL);
+ *destp = source;
+}
+
+isc_result_t
+dns_dt_getstats(dns_dtenv_t *env, isc_stats_t **statsp) {
+ REQUIRE(VALID_DTENV(env));
+ REQUIRE(statsp != NULL && *statsp == NULL);
+
+ if (env->stats == NULL)
+ return (ISC_R_NOTFOUND);
+ isc_stats_attach(env->stats, statsp);
+ return (ISC_R_SUCCESS);
+}
+
+static void
+destroy(dns_dtenv_t *env) {
+
+ isc_log_write(dns_lctx, DNS_LOGCATEGORY_DNSTAP,
+ DNS_LOGMODULE_DNSTAP, ISC_LOG_INFO,
+ "closing dnstap");
+ env->magic = 0;
+
+ generation++;
+
+ if (env->iothr != NULL)
+ fstrm_iothr_destroy(&env->iothr);
+ if (env->fopt != NULL)
+ fstrm_iothr_options_destroy(&env->fopt);
+
+ if (env->identity.base != NULL) {
+ isc_mem_free(env->mctx, env->identity.base);
+ env->identity.length = 0;
+ }
+ if (env->version.base != NULL) {
+ isc_mem_free(env->mctx, env->version.base);
+ env->version.length = 0;
+ }
+ if (env->path != NULL)
+ isc_mem_free(env->mctx, env->path);
+ if (env->stats != NULL)
+ isc_stats_detach(&env->stats);
+
+ isc_mem_putanddetach(&env->mctx, env, sizeof(*env));
+}
+
+void
+dns_dt_detach(dns_dtenv_t **envp) {
+ unsigned int refs;
+ dns_dtenv_t *env;
+
+ REQUIRE(envp != NULL && VALID_DTENV(*envp));
+
+ env = *envp;
+ *envp = NULL;
+
+ isc_refcount_decrement(&env->refcount, &refs);
+ if (refs == 0)
+ destroy(env);
+}
+
+static isc_result_t
+pack_dt(const Dnstap__Dnstap *d, void **buf, size_t *sz) {
+ ProtobufCBufferSimple sbuf;
+
+ REQUIRE(d != NULL);
+ REQUIRE(sz != NULL);
+
+ memset(&sbuf, 0, sizeof(sbuf));
+ sbuf.base.append = protobuf_c_buffer_simple_append;
+ sbuf.len = 0;
+ sbuf.alloced = DNSTAP_INITIAL_BUF_SIZE;
+
+ /* Need to use malloc() here because protobuf uses free() */
+ sbuf.data = malloc(sbuf.alloced);
+ if (sbuf.data == NULL)
+ return (ISC_R_NOMEMORY);
+ sbuf.must_free_data = 1;
+
+ *sz = dnstap__dnstap__pack_to_buffer(d, (ProtobufCBuffer *) &sbuf);
+ if (sbuf.data == NULL)
+ return (ISC_R_FAILURE);
+ *buf = sbuf.data;
+
+ return (ISC_R_SUCCESS);
+}
+
+static void
+send_dt(dns_dtenv_t *env, void *buf, size_t len) {
+ struct fstrm_iothr_queue *ioq;
+ fstrm_res res;
+
+ REQUIRE(env != NULL);
+
+ if (buf == NULL)
+ return;
+
+ ioq = dt_queue(env);
+ if (ioq == NULL) {
+ free(buf);
+ return;
+ }
+
+ res = fstrm_iothr_submit(env->iothr, ioq, buf, len,
+ fstrm_free_wrapper, NULL);
+ if (res != fstrm_res_success) {
+ if (env->stats != NULL)
+ isc_stats_increment(env->stats,
+ dns_dnstapcounter_drop);
+ free(buf);
+ } else {
+ if (env->stats != NULL)
+ isc_stats_increment(env->stats,
+ dns_dnstapcounter_success);
+ }
+}
+
+static void
+init_msg(dns_dtenv_t *env, dns_dtmsg_t *dm, Dnstap__Message__Type mtype) {
+ memset(dm, 0, sizeof(*dm));
+ dm->d.base.descriptor = &dnstap__dnstap__descriptor;
+ dm->m.base.descriptor = &dnstap__message__descriptor;
+ dm->d.type = DNSTAP__DNSTAP__TYPE__MESSAGE;
+ dm->d.message = &dm->m;
+ dm->m.type = mtype;
+
+ if (env->identity.length != 0) {
+ dm->d.identity.data = env->identity.base;
+ dm->d.identity.len = env->identity.length;
+ dm->d.has_identity = true;
+ }
+
+ if (env->version.length != 0) {
+ dm->d.version.data = env->version.base;
+ dm->d.version.len = env->version.length;
+ dm->d.has_version = true;
+ }
+}
+
+static Dnstap__Message__Type
+dnstap_type(dns_dtmsgtype_t msgtype) {
+ switch (msgtype) {
+ case DNS_DTTYPE_SQ:
+ return (DNSTAP__MESSAGE__TYPE__STUB_QUERY);
+ case DNS_DTTYPE_SR:
+ return (DNSTAP__MESSAGE__TYPE__STUB_RESPONSE);
+ case DNS_DTTYPE_CQ:
+ return (DNSTAP__MESSAGE__TYPE__CLIENT_QUERY);
+ case DNS_DTTYPE_CR:
+ return (DNSTAP__MESSAGE__TYPE__CLIENT_RESPONSE);
+ case DNS_DTTYPE_AQ:
+ return (DNSTAP__MESSAGE__TYPE__AUTH_QUERY);
+ case DNS_DTTYPE_AR:
+ return (DNSTAP__MESSAGE__TYPE__AUTH_RESPONSE);
+ case DNS_DTTYPE_RQ:
+ return (DNSTAP__MESSAGE__TYPE__RESOLVER_QUERY);
+ case DNS_DTTYPE_RR:
+ return (DNSTAP__MESSAGE__TYPE__RESOLVER_RESPONSE);
+ case DNS_DTTYPE_FQ:
+ return (DNSTAP__MESSAGE__TYPE__FORWARDER_QUERY);
+ case DNS_DTTYPE_FR:
+ return (DNSTAP__MESSAGE__TYPE__FORWARDER_RESPONSE);
+ case DNS_DTTYPE_TQ:
+ return (DNSTAP__MESSAGE__TYPE__TOOL_QUERY);
+ case DNS_DTTYPE_TR:
+ return (DNSTAP__MESSAGE__TYPE__TOOL_RESPONSE);
+ default:
+ INSIST(0);
+ }
+}
+
+static void
+cpbuf(isc_buffer_t *buf, ProtobufCBinaryData *p, protobuf_c_boolean *has) {
+ p->data = isc_buffer_base(buf);
+ p->len = isc_buffer_usedlength(buf);
+ *has = 1;
+}
+
+static void
+setaddr(dns_dtmsg_t *dm, isc_sockaddr_t *sa, bool tcp,
+ ProtobufCBinaryData *addr, protobuf_c_boolean *has_addr,
+ uint32_t *port, protobuf_c_boolean *has_port)
+{
+ int family = isc_sockaddr_pf(sa);
+
+ if (family != AF_INET6 && family != AF_INET)
+ return;
+
+ if (family == AF_INET6) {
+ dm->m.socket_family = DNSTAP__SOCKET_FAMILY__INET6;
+ addr->data = sa->type.sin6.sin6_addr.s6_addr;
+ addr->len = 16;
+ *port = ntohs(sa->type.sin6.sin6_port);
+ } else {
+ dm->m.socket_family = DNSTAP__SOCKET_FAMILY__INET;
+ addr->data = (uint8_t *) &sa->type.sin.sin_addr.s_addr;
+ addr->len = 4;
+ *port = ntohs(sa->type.sin.sin_port);
+ }
+
+ if (tcp)
+ dm->m.socket_protocol = DNSTAP__SOCKET_PROTOCOL__TCP;
+ else
+ dm->m.socket_protocol = DNSTAP__SOCKET_PROTOCOL__UDP;
+
+ dm->m.has_socket_protocol = 1;
+ dm->m.has_socket_family = 1;
+ *has_addr = 1;
+ *has_port = 1;
+}
+
+void
+dns_dt_send(dns_view_t *view, dns_dtmsgtype_t msgtype,
+ isc_sockaddr_t *qaddr, isc_sockaddr_t *raddr,
+ bool tcp, isc_region_t *zone, isc_time_t *qtime,
+ isc_time_t *rtime, isc_buffer_t *buf)
+{
+ isc_time_t now, *t;
+ dns_dtmsg_t dm;
+
+ REQUIRE(DNS_VIEW_VALID(view));
+
+ if ((msgtype & view->dttypes) == 0)
+ return;
+
+ if (view->dtenv == NULL)
+ return;
+
+ REQUIRE(VALID_DTENV(view->dtenv));
+
+ TIME_NOW(&now);
+ t = &now;
+
+ init_msg(view->dtenv, &dm, dnstap_type(msgtype));
+
+ /* Query/response times */
+ switch (msgtype) {
+ case DNS_DTTYPE_AR:
+ case DNS_DTTYPE_CR:
+ case DNS_DTTYPE_RR:
+ case DNS_DTTYPE_FR:
+ case DNS_DTTYPE_SR:
+ case DNS_DTTYPE_TR:
+ if (rtime != NULL)
+ t = rtime;
+
+ dm.m.response_time_sec = isc_time_seconds(t);
+ dm.m.has_response_time_sec = 1;
+ dm.m.response_time_nsec = isc_time_nanoseconds(t);
+ dm.m.has_response_time_nsec = 1;
+
+ cpbuf(buf, &dm.m.response_message, &dm.m.has_response_message);
+
+ /* Types RR and FR get both query and response times */
+ if (msgtype == DNS_DTTYPE_CR || msgtype == DNS_DTTYPE_AR)
+ break;
+
+ /* FALLTHROUGH */
+ case DNS_DTTYPE_AQ:
+ case DNS_DTTYPE_CQ:
+ case DNS_DTTYPE_FQ:
+ case DNS_DTTYPE_RQ:
+ case DNS_DTTYPE_SQ:
+ case DNS_DTTYPE_TQ:
+ if (qtime != NULL)
+ t = qtime;
+
+ dm.m.query_time_sec = isc_time_seconds(t);
+ dm.m.has_query_time_sec = 1;
+ dm.m.query_time_nsec = isc_time_nanoseconds(t);
+ dm.m.has_query_time_nsec = 1;
+
+ cpbuf(buf, &dm.m.query_message, &dm.m.has_query_message);
+ break;
+ default:
+ isc_log_write(dns_lctx, DNS_LOGCATEGORY_DNSTAP,
+ DNS_LOGMODULE_DNSTAP, ISC_LOG_ERROR,
+ "invalid dnstap message type %d", msgtype);
+ return;
+ }
+
+ /* Zone/bailiwick */
+ switch (msgtype) {
+ case DNS_DTTYPE_AR:
+ case DNS_DTTYPE_RQ:
+ case DNS_DTTYPE_RR:
+ case DNS_DTTYPE_FQ:
+ case DNS_DTTYPE_FR:
+ if (zone != NULL && zone->base != NULL && zone->length != 0) {
+ dm.m.query_zone.data = zone->base;
+ dm.m.query_zone.len = zone->length;
+ dm.m.has_query_zone = 1;
+ }
+ break;
+ default:
+ break;
+ }
+
+ if (qaddr != NULL) {
+ setaddr(&dm, qaddr, tcp,
+ &dm.m.query_address, &dm.m.has_query_address,
+ &dm.m.query_port, &dm.m.has_query_port);
+ }
+ if (raddr != NULL) {
+ setaddr(&dm, raddr, tcp,
+ &dm.m.response_address, &dm.m.has_response_address,
+ &dm.m.response_port, &dm.m.has_response_port);
+ }
+
+ if (pack_dt(&dm.d, &dm.buf, &dm.len) == ISC_R_SUCCESS)
+ send_dt(view->dtenv, dm.buf, dm.len);
+}
+
+void
+dns_dt_shutdown() {
+ if (dt_mctx != NULL)
+ isc_mem_detach(&dt_mctx);
+}
+
+static isc_result_t
+putstr(isc_buffer_t **b, const char *str) {
+ isc_result_t result;
+
+ result = isc_buffer_reserve(b, strlen(str));
+ if (result != ISC_R_SUCCESS)
+ return (ISC_R_NOSPACE);
+
+ isc_buffer_putstr(*b, str);
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+putaddr(isc_buffer_t **b, isc_region_t *ip) {
+ char buf[64];
+
+ if (ip->length == 4) {
+ if (!inet_ntop(AF_INET, ip->base, buf, sizeof(buf)))
+ return (ISC_R_FAILURE);
+ } else if (ip->length == 16) {
+ if (!inet_ntop(AF_INET6, ip->base, buf, sizeof(buf)))
+ return (ISC_R_FAILURE);
+ } else
+ return (ISC_R_BADADDRESSFORM);
+
+ return (putstr(b, buf));
+}
+
+static bool
+dnstap_file(struct fstrm_reader *r) {
+ fstrm_res res;
+ const struct fstrm_control *control = NULL;
+ const uint8_t *rtype = NULL;
+ size_t dlen = strlen(DNSTAP_CONTENT_TYPE), rlen = 0;
+ size_t n = 0;
+
+ res = fstrm_reader_get_control(r, FSTRM_CONTROL_START, &control);
+ if (res != fstrm_res_success)
+ return (false);
+
+ res = fstrm_control_get_num_field_content_type(control, &n);
+ if (res != fstrm_res_success)
+ return (false);
+ if (n > 0) {
+ res = fstrm_control_get_field_content_type(control, 0,
+ &rtype, &rlen);
+ if (res != fstrm_res_success)
+ return (false);
+
+ if (rlen != dlen)
+ return (false);
+
+ if (memcmp(DNSTAP_CONTENT_TYPE, rtype, dlen) == 0)
+ return (true);
+ }
+
+ return (false);
+}
+
+isc_result_t
+dns_dt_open(const char *filename, dns_dtmode_t mode, isc_mem_t *mctx,
+ dns_dthandle_t **handlep)
+{
+ isc_result_t result;
+ struct fstrm_file_options *fopt = NULL;
+ fstrm_res res;
+ dns_dthandle_t *handle;
+
+ REQUIRE(handlep != NULL && *handlep == NULL);
+
+ handle = isc_mem_get(mctx, sizeof(*handle));
+ if (handle == NULL)
+ CHECK(ISC_R_NOMEMORY);
+
+ handle->mode = mode;
+ handle->mctx = NULL;
+
+ switch(mode) {
+ case dns_dtmode_file:
+ fopt = fstrm_file_options_init();
+ if (fopt == NULL)
+ CHECK(ISC_R_NOMEMORY);
+
+ fstrm_file_options_set_file_path(fopt, filename);
+
+ handle->reader = fstrm_file_reader_init(fopt, NULL);
+ if (handle->reader == NULL)
+ CHECK(ISC_R_NOMEMORY);
+
+ res = fstrm_reader_open(handle->reader);
+ if (res != fstrm_res_success)
+ CHECK(ISC_R_FAILURE);
+
+ if (!dnstap_file(handle->reader))
+ CHECK(DNS_R_BADDNSTAP);
+ break;
+ case dns_dtmode_unix:
+ return (ISC_R_NOTIMPLEMENTED);
+ default:
+ INSIST(0);
+ }
+
+ isc_mem_attach(mctx, &handle->mctx);
+ result = ISC_R_SUCCESS;
+ *handlep = handle;
+ handle = NULL;
+
+ cleanup:
+ if (result != ISC_R_SUCCESS && handle->reader != NULL) {
+ fstrm_reader_destroy(&handle->reader);
+ handle->reader = NULL;
+ }
+ if (fopt != NULL)
+ fstrm_file_options_destroy(&fopt);
+ if (handle != NULL)
+ isc_mem_put(mctx, handle, sizeof(*handle));
+ return (result);
+}
+
+isc_result_t
+dns_dt_getframe(dns_dthandle_t *handle, uint8_t **bufp, size_t *sizep) {
+ const uint8_t *data;
+ fstrm_res res;
+
+ REQUIRE(handle != NULL);
+ REQUIRE(bufp != NULL);
+ REQUIRE(sizep != NULL);
+
+ data = (const uint8_t *) *bufp;
+
+ res = fstrm_reader_read(handle->reader, &data, sizep);
+ switch (res) {
+ case fstrm_res_success:
+ if (data == NULL)
+ return (ISC_R_FAILURE);
+ DE_CONST(data, *bufp);
+ return (ISC_R_SUCCESS);
+ case fstrm_res_stop:
+ return (ISC_R_NOMORE);
+ default:
+ return (ISC_R_FAILURE);
+ }
+}
+
+void
+dns_dt_close(dns_dthandle_t **handlep) {
+ dns_dthandle_t *handle;
+
+ REQUIRE(handlep != NULL && *handlep != NULL);
+
+ handle = *handlep;
+ *handlep = NULL;
+
+ if (handle->reader != NULL) {
+ fstrm_reader_destroy(&handle->reader);
+ handle->reader = NULL;
+ }
+ isc_mem_putanddetach(&handle->mctx, handle, sizeof(*handle));
+}
+
+isc_result_t
+dns_dt_parse(isc_mem_t *mctx, isc_region_t *src, dns_dtdata_t **destp) {
+ isc_result_t result;
+ Dnstap__Message *m;
+ dns_dtdata_t *d = NULL;
+ isc_buffer_t b;
+
+ REQUIRE(src != NULL);
+ REQUIRE(destp != NULL && *destp == NULL);
+
+ d = isc_mem_get(mctx, sizeof(*d));
+ if (d == NULL)
+ return (ISC_R_NOMEMORY);
+
+ memset(d, 0, sizeof(*d));
+ isc_mem_attach(mctx, &d->mctx);
+
+ d->frame = dnstap__dnstap__unpack(NULL, src->length, src->base);
+ if (d->frame == NULL)
+ CHECK(ISC_R_NOMEMORY);
+
+ if (d->frame->type != DNSTAP__DNSTAP__TYPE__MESSAGE)
+ CHECK(DNS_R_BADDNSTAP);
+
+ m = d->frame->message;
+
+ /* Message type */
+ switch (m->type) {
+ case DNSTAP__MESSAGE__TYPE__AUTH_QUERY:
+ d->type = DNS_DTTYPE_AQ;
+ break;
+ case DNSTAP__MESSAGE__TYPE__AUTH_RESPONSE:
+ d->type = DNS_DTTYPE_AR;
+ break;
+ case DNSTAP__MESSAGE__TYPE__CLIENT_QUERY:
+ d->type = DNS_DTTYPE_CQ;
+ break;
+ case DNSTAP__MESSAGE__TYPE__CLIENT_RESPONSE:
+ d->type = DNS_DTTYPE_CR;
+ break;
+ case DNSTAP__MESSAGE__TYPE__FORWARDER_QUERY:
+ d->type = DNS_DTTYPE_FQ;
+ break;
+ case DNSTAP__MESSAGE__TYPE__FORWARDER_RESPONSE:
+ d->type = DNS_DTTYPE_FR;
+ break;
+ case DNSTAP__MESSAGE__TYPE__RESOLVER_QUERY:
+ d->type = DNS_DTTYPE_RQ;
+ break;
+ case DNSTAP__MESSAGE__TYPE__RESOLVER_RESPONSE:
+ d->type = DNS_DTTYPE_RR;
+ break;
+ case DNSTAP__MESSAGE__TYPE__STUB_QUERY:
+ d->type = DNS_DTTYPE_SQ;
+ break;
+ case DNSTAP__MESSAGE__TYPE__STUB_RESPONSE:
+ d->type = DNS_DTTYPE_SR;
+ break;
+ case DNSTAP__MESSAGE__TYPE__TOOL_QUERY:
+ d->type = DNS_DTTYPE_TQ;
+ break;
+ case DNSTAP__MESSAGE__TYPE__TOOL_RESPONSE:
+ d->type = DNS_DTTYPE_TR;
+ break;
+ default:
+ CHECK(DNS_R_BADDNSTAP);
+ }
+
+ /* Query? */
+ if ((d->type & DNS_DTTYPE_QUERY) != 0)
+ d->query = true;
+ else
+ d->query = false;
+
+ /* Parse DNS message */
+ if (d->query && m->has_query_message) {
+ d->msgdata.base = m->query_message.data;
+ d->msgdata.length = m->query_message.len;
+ } else if (!d->query && m->has_response_message) {
+ d->msgdata.base = m->response_message.data;
+ d->msgdata.length = m->response_message.len;
+ }
+
+ isc_buffer_init(&b, d->msgdata.base, d->msgdata.length);
+ isc_buffer_add(&b, d->msgdata.length);
+ CHECK(dns_message_create(mctx, DNS_MESSAGE_INTENTPARSE, &d->msg));
+ result = dns_message_parse(d->msg, &b, 0);
+ if (result != ISC_R_SUCCESS) {
+ if (result != DNS_R_RECOVERABLE)
+ dns_message_destroy(&d->msg);
+ result = ISC_R_SUCCESS;
+ }
+
+ /* Timestamp */
+ if (d->query) {
+ if (m->has_query_time_sec && m->has_query_time_nsec)
+ isc_time_set(&d->qtime, m->query_time_sec,
+ m->query_time_nsec);
+ } else {
+ if (m->has_response_time_sec && m->has_response_time_nsec)
+ isc_time_set(&d->rtime, m->response_time_sec,
+ m->response_time_nsec);
+ }
+
+ /* Peer address */
+ if (m->has_query_address) {
+ d->qaddr.base = m->query_address.data;
+ d->qaddr.length = m->query_address.len;
+ }
+ if (m->has_query_port) {
+ d->qport = m->query_port;
+ }
+
+ if (m->has_response_address) {
+ d->raddr.base = m->response_address.data;
+ d->raddr.length = m->response_address.len;
+ }
+ if (m->has_response_port) {
+ d->rport = m->response_port;
+ }
+
+ /* Socket protocol */
+ if (m->has_socket_protocol) {
+ const ProtobufCEnumValue *type =
+ protobuf_c_enum_descriptor_get_value(
+ &dnstap__socket_protocol__descriptor,
+ m->socket_protocol);
+ if (type != NULL &&
+ type->value == DNSTAP__SOCKET_PROTOCOL__TCP)
+ d->tcp = true;
+ else
+ d->tcp = false;
+ }
+
+ /* Query tuple */
+ if (d->msg != NULL) {
+ dns_name_t *name = NULL;
+ dns_rdataset_t *rdataset;
+
+ CHECK(dns_message_firstname(d->msg, DNS_SECTION_QUESTION));
+ dns_message_currentname(d->msg, DNS_SECTION_QUESTION, &name);
+ rdataset = ISC_LIST_HEAD(name->list);
+
+ dns_name_format(name, d->namebuf, sizeof(d->namebuf));
+ dns_rdatatype_format(rdataset->type, d->typebuf,
+ sizeof(d->typebuf));
+ dns_rdataclass_format(rdataset->rdclass, d->classbuf,
+ sizeof(d->classbuf));
+ }
+
+ *destp = d;
+
+ cleanup:
+ if (result != ISC_R_SUCCESS)
+ dns_dtdata_free(&d);
+
+ return (result);
+}
+
+isc_result_t
+dns_dt_datatotext(dns_dtdata_t *d, isc_buffer_t **dest) {
+ isc_result_t result;
+ char buf[100];
+
+ REQUIRE(d != NULL);
+ REQUIRE(dest != NULL && *dest != NULL);
+
+ memset(buf, 0, sizeof(buf));
+
+ /* Timestamp */
+ if (d->query && !isc_time_isepoch(&d->qtime))
+ isc_time_formattimestamp(&d->qtime, buf, sizeof(buf));
+ else if (!d->query && !isc_time_isepoch(&d->rtime))
+ isc_time_formattimestamp(&d->rtime, buf, sizeof(buf));
+
+ if (buf[0] == '\0')
+ CHECK(putstr(dest, "???\?-?\?-?? ??:??:??.??? "));
+ else {
+ CHECK(putstr(dest, buf));
+ CHECK(putstr(dest, " "));
+ }
+
+ /* Type mnemonic */
+ switch (d->type) {
+ case DNS_DTTYPE_AQ:
+ CHECK(putstr(dest, "AQ "));
+ break;
+ case DNS_DTTYPE_AR:
+ CHECK(putstr(dest, "AR "));
+ break;
+ case DNS_DTTYPE_CQ:
+ CHECK(putstr(dest, "CQ "));
+ break;
+ case DNS_DTTYPE_CR:
+ CHECK(putstr(dest, "CR "));
+ break;
+ case DNS_DTTYPE_FQ:
+ CHECK(putstr(dest, "FQ "));
+ break;
+ case DNS_DTTYPE_FR:
+ CHECK(putstr(dest, "FR "));
+ break;
+ case DNS_DTTYPE_RQ:
+ CHECK(putstr(dest, "RQ "));
+ break;
+ case DNS_DTTYPE_RR:
+ CHECK(putstr(dest, "RR "));
+ break;
+ case DNS_DTTYPE_SQ:
+ CHECK(putstr(dest, "SQ "));
+ break;
+ case DNS_DTTYPE_SR:
+ CHECK(putstr(dest, "SR "));
+ break;
+ case DNS_DTTYPE_TQ:
+ CHECK(putstr(dest, "TQ "));
+ break;
+ case DNS_DTTYPE_TR:
+ CHECK(putstr(dest, "TR "));
+ break;
+ default:
+ return (DNS_R_BADDNSTAP);
+ }
+
+ /* Query and response addresses */
+ if (d->qaddr.length != 0) {
+ CHECK(putaddr(dest, &d->qaddr));
+ snprintf(buf, sizeof(buf), ":%u", d->qport);
+ CHECK(putstr(dest, buf));
+ } else {
+ CHECK(putstr(dest, "?"));
+ }
+ if ((d->type & DNS_DTTYPE_QUERY) != 0) {
+ CHECK(putstr(dest, " -> "));
+ } else {
+ CHECK(putstr(dest, " <- "));
+ }
+ if (d->raddr.length != 0) {
+ CHECK(putaddr(dest, &d->raddr));
+ snprintf(buf, sizeof(buf), ":%u", d->rport);
+ CHECK(putstr(dest, buf));
+ } else {
+ CHECK(putstr(dest, "?"));
+ }
+
+ CHECK(putstr(dest, " "));
+
+ /* Protocol */
+ if (d->tcp)
+ CHECK(putstr(dest, "TCP "));
+ else
+ CHECK(putstr(dest, "UDP "));
+
+ /* Message size */
+ if (d->msgdata.base != NULL) {
+ snprintf(buf, sizeof(buf), "%zub ", (size_t) d->msgdata.length);
+ CHECK(putstr(dest, buf));
+ } else
+ CHECK(putstr(dest, "0b "));
+
+ /* Query tuple */
+ if (d->namebuf[0] == '\0')
+ CHECK(putstr(dest, "?/"));
+ else {
+ CHECK(putstr(dest, d->namebuf));
+ CHECK(putstr(dest, "/"));
+ }
+
+ if (d->classbuf[0] == '\0')
+ CHECK(putstr(dest, "?/"));
+ else {
+ CHECK(putstr(dest, d->classbuf));
+ CHECK(putstr(dest, "/"));
+ }
+
+ if (d->typebuf[0] == '\0')
+ CHECK(putstr(dest, "?"));
+ else
+ CHECK(putstr(dest, d->typebuf));
+
+ CHECK(isc_buffer_reserve(dest, 1));
+ isc_buffer_putuint8(*dest, 0);
+
+ cleanup:
+ return (result);
+}
+
+void
+dns_dtdata_free(dns_dtdata_t **dp) {
+ dns_dtdata_t *d;
+
+ REQUIRE(dp != NULL && *dp != NULL);
+
+ d = *dp;
+
+ if (d->msg != NULL)
+ dns_message_destroy(&d->msg);
+ if (d->frame != NULL)
+ dnstap__dnstap__free_unpacked(d->frame, NULL);
+
+ isc_mem_putanddetach(&d->mctx, d, sizeof(*d));
+
+ *dp = NULL;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-05 09:11:53 +0000