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-rw-r--r--src/lib-dns/Makefile.am36
-rw-r--r--src/lib-dns/Makefile.in874
-rw-r--r--src/lib-dns/dns-lookup.c438
-rw-r--r--src/lib-dns/dns-lookup.h90
-rw-r--r--src/lib-dns/dns-util.c85
-rw-r--r--src/lib-dns/dns-util.h36
-rw-r--r--src/lib-dns/test-dns-util.c124
7 files changed, 1683 insertions, 0 deletions
diff --git a/src/lib-dns/Makefile.am b/src/lib-dns/Makefile.am
new file mode 100644
index 0000000..509f7b0
--- /dev/null
+++ b/src/lib-dns/Makefile.am
@@ -0,0 +1,36 @@
+noinst_LTLIBRARIES = libdns.la
+
+AM_CPPFLAGS = \
+ -I$(top_srcdir)/src/lib
+
+libdns_la_SOURCES = \
+ dns-lookup.c \
+ dns-util.c
+
+headers = \
+ dns-lookup.h \
+ dns-util.h
+
+test_programs = \
+ test-dns-util
+
+noinst_PROGRAMS = $(test_programs)
+
+test_libs = \
+ libdns.la \
+ ../lib-test/libtest.la \
+ ../lib/liblib.la
+
+test_dns_util_SOURCE = test-dns-util.c
+test_dns_util_LDADD = $(test_libs)
+test_dns_util_CFLAGS = $(AM_CPPFLAGS) \
+ -I$(top_srcdir)/src/lib-test
+
+check-local:
+ for bin in $(test_programs); do \
+ if ! $(RUN_TEST) ./$$bin; then exit 1; fi; \
+ done
+
+
+pkginc_libdir=$(pkgincludedir)
+pkginc_lib_HEADERS = $(headers)
diff --git a/src/lib-dns/Makefile.in b/src/lib-dns/Makefile.in
new file mode 100644
index 0000000..fe45740
--- /dev/null
+++ b/src/lib-dns/Makefile.in
@@ -0,0 +1,874 @@
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+
+# Copyright (C) 1994-2018 Free Software Foundation, Inc.
+
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+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
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+
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diff --git a/src/lib-dns/dns-lookup.c b/src/lib-dns/dns-lookup.c
new file mode 100644
index 0000000..c37445e
--- /dev/null
+++ b/src/lib-dns/dns-lookup.c
@@ -0,0 +1,438 @@
+/* Copyright (c) 2010-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "ioloop.h"
+#include "str.h"
+#include "array.h"
+#include "ostream.h"
+#include "connection.h"
+#include "lib-event.h"
+#include "llist.h"
+#include "istream.h"
+#include "write-full.h"
+#include "time-util.h"
+#include "dns-lookup.h"
+
+#include <stdio.h>
+#include <unistd.h>
+
+#define MAX_INBUF_SIZE 512
+
+static struct event_category event_category_dns = {
+ .name = "dns"
+};
+
+struct dns_lookup {
+ struct dns_lookup *prev, *next;
+ struct dns_client *client;
+ pool_t pool;
+ bool ptr_lookup;
+
+ struct timeout *to;
+
+ struct timeval start_time;
+ unsigned int warn_msecs;
+
+ struct dns_lookup_result result;
+ struct event *event;
+
+ dns_lookup_callback_t *callback;
+ void *context;
+};
+
+struct dns_client {
+ struct connection conn;
+ struct connection_list *clist;
+ struct dns_lookup *head, *tail;
+ struct timeout *to_idle;
+ struct ioloop *ioloop;
+ char *path;
+
+ unsigned int timeout_msecs;
+ unsigned int idle_timeout_msecs;
+
+ bool connected:1;
+ bool deinit_client_at_free:1;
+};
+
+#undef dns_lookup
+#undef dns_lookup_ptr
+#undef dns_client_lookup
+#undef dns_client_lookup_ptr
+
+static void dns_lookup_free(struct dns_lookup **_lookup);
+
+static void dns_lookup_save_msecs(struct dns_lookup *lookup);
+
+static void dns_lookup_callback(struct dns_lookup *lookup)
+{
+ struct event_passthrough *e =
+ event_create_passthrough(lookup->event)->
+ set_name("dns_request_finished");
+
+ dns_lookup_save_msecs(lookup);
+
+ if (lookup->result.ret != 0) {
+ e->add_int("error_code", lookup->result.ret);
+ e->add_str("error", lookup->result.error);
+ e_debug(e->event(), "Lookup failed after %u msecs: %s",
+ lookup->result.msecs, lookup->result.error);
+ } else {
+ e_debug(e->event(), "Lookup successful after %u msecs",
+ lookup->result.msecs);
+ }
+ lookup->callback(&lookup->result, lookup->context);
+}
+
+static void dns_client_disconnect(struct dns_client *client, const char *error)
+{
+ struct dns_lookup *lookup, *next;
+ struct dns_lookup_result result;
+
+ if (!client->connected)
+ return;
+ timeout_remove(&client->to_idle);
+
+ connection_disconnect(&client->conn);
+ client->connected = FALSE;
+
+ i_zero(&result);
+ result.ret = EAI_FAIL;
+ result.error = error;
+ e_debug(client->conn.event, "Disconnect: %s", error);
+
+ lookup = client->head;
+ client->head = NULL;
+ while (lookup != NULL) {
+ next = lookup->next;
+ dns_lookup_callback(lookup);
+ dns_lookup_free(&lookup);
+ lookup = next;
+ }
+}
+
+static void dns_client_destroy(struct connection *conn)
+{
+ struct dns_client *client = container_of(conn, struct dns_client, conn);
+ client->connected = FALSE;
+ connection_deinit(conn);
+}
+
+static int dns_lookup_input_args(struct dns_lookup *lookup, const char *const *args)
+{
+ struct dns_lookup_result *result = &lookup->result;
+
+ if (str_to_int(args[0], &result->ret) < 0)
+ return -1;
+ if (result->ret != 0) {
+ result->error = args[1];
+ return 1;
+ }
+
+ if (lookup->ptr_lookup) {
+ result->name = p_strdup(lookup->pool, args[1]);
+ return 1;
+ }
+
+ ARRAY(struct ip_addr) ips;
+ p_array_init(&ips, lookup->pool, 2);
+ for(unsigned int i = 1; args[i] != NULL; i++) {
+ struct ip_addr *ip = array_append_space(&ips);
+ if (net_addr2ip(args[i], ip) < 0)
+ return -1;
+ }
+ result->ips = array_get(&ips, &result->ips_count);
+
+ return 1;
+}
+
+static void dns_lookup_save_msecs(struct dns_lookup *lookup)
+{
+ struct timeval now;
+ int diff;
+
+ i_gettimeofday(&now);
+
+ diff = timeval_diff_msecs(&now, &lookup->start_time);
+ if (diff > 0)
+ lookup->result.msecs = diff;
+}
+
+static int dns_client_input_args(struct connection *conn, const char *const *args)
+{
+ struct dns_client *client = container_of(conn, struct dns_client, conn);
+ struct dns_lookup *lookup = client->head;
+ bool retry = FALSE;
+ int ret = 0;
+
+ if (lookup == NULL) {
+ dns_client_disconnect(client, t_strdup_printf(
+ "Unexpected input from %s", conn->name));
+ return -1;
+ }
+
+ if ((ret = dns_lookup_input_args(lookup, args)) == 0) {
+ return 1; /* keep on reading */
+ } else if (ret < 0) {
+ dns_client_disconnect(client, t_strdup_printf(
+ "Invalid input from %s", conn->name));
+ return -1;
+ } else if (ret > 0) {
+ dns_lookup_callback(lookup);
+ retry = !lookup->client->deinit_client_at_free;
+ dns_lookup_free(&lookup);
+ }
+
+ return retry ? 1 : -1;
+}
+
+static void dns_lookup_timeout(struct dns_lookup *lookup)
+{
+ lookup->result.error = "Lookup timed out";
+
+ dns_lookup_callback(lookup);
+ dns_lookup_free(&lookup);
+}
+
+int dns_lookup(const char *host, const struct dns_lookup_settings *set,
+ dns_lookup_callback_t *callback, void *context,
+ struct dns_lookup **lookup_r)
+{
+ struct dns_client *client;
+
+ client = dns_client_init(set);
+ event_add_category(client->conn.event, &event_category_dns);
+ client->deinit_client_at_free = TRUE;
+ return dns_client_lookup(client, host, callback, context, lookup_r);
+}
+
+int dns_lookup_ptr(const struct ip_addr *ip,
+ const struct dns_lookup_settings *set,
+ dns_lookup_callback_t *callback, void *context,
+ struct dns_lookup **lookup_r)
+{
+ struct dns_client *client;
+
+ client = dns_client_init(set);
+ event_add_category(client->conn.event, &event_category_dns);
+ client->deinit_client_at_free = TRUE;
+ return dns_client_lookup_ptr(client, ip, callback, context, lookup_r);
+}
+
+static void dns_client_idle_timeout(struct dns_client *client)
+{
+ i_assert(client->head == NULL);
+
+ /* send QUIT */
+ o_stream_nsend_str(client->conn.output, "QUIT\n");
+ dns_client_disconnect(client, "Idle timeout");
+}
+
+static void dns_lookup_free(struct dns_lookup **_lookup)
+{
+ struct dns_lookup *lookup = *_lookup;
+ struct dns_client *client = lookup->client;
+
+ *_lookup = NULL;
+
+ DLLIST2_REMOVE(&client->head, &client->tail, lookup);
+ timeout_remove(&lookup->to);
+ if (client->deinit_client_at_free)
+ dns_client_deinit(&client);
+ else if (client->head == NULL && client->connected) {
+ client->to_idle = timeout_add_to(client->ioloop,
+ client->idle_timeout_msecs,
+ dns_client_idle_timeout, client);
+ }
+ event_unref(&lookup->event);
+ pool_unref(&lookup->pool);
+}
+
+void dns_lookup_abort(struct dns_lookup **lookup)
+{
+ dns_lookup_free(lookup);
+}
+
+static void dns_lookup_switch_ioloop_real(struct dns_lookup *lookup)
+{
+ if (lookup->to != NULL)
+ lookup->to = io_loop_move_timeout(&lookup->to);
+}
+
+void dns_lookup_switch_ioloop(struct dns_lookup *lookup)
+{
+ /* dns client ioloop switch switches all lookups too */
+ if (lookup->client->deinit_client_at_free)
+ dns_client_switch_ioloop(lookup->client);
+ else
+ dns_lookup_switch_ioloop_real(lookup);
+}
+
+static void dns_client_connected(struct connection *conn, bool success)
+{
+ struct dns_client *client = container_of(conn, struct dns_client, conn);
+ if (!success)
+ return;
+ client->connected = TRUE;
+}
+
+static const struct connection_vfuncs dns_client_vfuncs = {
+ .destroy = dns_client_destroy,
+ .input_args = dns_client_input_args,
+ .client_connected = dns_client_connected,
+};
+
+static const struct connection_settings dns_client_set = {
+ .service_name_in = "dns",
+ .service_name_out = "dns-client",
+ .major_version = 1,
+ .minor_version = 0,
+ .input_max_size = SIZE_MAX,
+ .output_max_size = SIZE_MAX,
+ .client = TRUE,
+};
+
+struct dns_client *dns_client_init(const struct dns_lookup_settings *set)
+{
+ struct dns_client *client;
+
+ client = i_new(struct dns_client, 1);
+ client->timeout_msecs = set->timeout_msecs;
+ client->idle_timeout_msecs = set->idle_timeout_msecs;
+ client->clist = connection_list_init(&dns_client_set, &dns_client_vfuncs);
+ client->ioloop = set->ioloop == NULL ? current_ioloop : set->ioloop;
+ client->path = i_strdup(set->dns_client_socket_path);
+ client->conn.event_parent=set->event_parent;
+ connection_init_client_unix(client->clist, &client->conn, client->path);
+ return client;
+}
+
+void dns_client_deinit(struct dns_client **_client)
+{
+ struct dns_client *client = *_client;
+ struct connection_list *clist = client->clist;
+ *_client = NULL;
+
+ i_assert(client->head == NULL);
+
+ dns_client_disconnect(client, "deinit");
+ connection_list_deinit(&clist);
+ i_free(client->path);
+ i_free(client);
+}
+
+int dns_client_connect(struct dns_client *client, const char **error_r)
+{
+ if (client->connected)
+ return 0;
+ if (client->ioloop != NULL)
+ connection_switch_ioloop_to(&client->conn, client->ioloop);
+ int ret = connection_client_connect(&client->conn);
+ if (ret < 0)
+ *error_r = t_strdup_printf("Failed to connect to %s: %m",
+ client->path);
+ return ret;
+}
+
+static int
+dns_client_send_request(struct dns_client *client, const char *cmd,
+ const char **error_r)
+{
+ int ret;
+
+ if (!client->connected) {
+ if (dns_client_connect(client, error_r) < 0)
+ return -1;
+ }
+
+ if ((ret = o_stream_send(client->conn.output, cmd, strlen(cmd))) < 0) {
+ *error_r = t_strdup_printf("write(%s) failed: %s",
+ client->conn.name,
+ o_stream_get_error(client->conn.output));
+ dns_client_disconnect(client, "Cannot send data");
+ }
+
+ return ret;
+}
+
+static int
+dns_client_lookup_common(struct dns_client *client,
+ const char *cmd, const char *param, bool ptr_lookup,
+ dns_lookup_callback_t *callback, void *context,
+ struct dns_lookup **lookup_r)
+{
+ struct dns_lookup *lookup;
+ int ret;
+
+ i_assert(param != NULL && *param != '\0');
+ cmd = t_strdup_printf("%s\t%s\n", cmd, param);
+
+ pool_t pool = pool_alloconly_create("dns lookup", 512);
+ lookup = p_new(pool, struct dns_lookup, 1);
+ lookup->pool = pool;
+
+ i_gettimeofday(&lookup->start_time);
+
+ lookup->client = client;
+ lookup->callback = callback;
+ lookup->context = context;
+ lookup->ptr_lookup = ptr_lookup;
+ lookup->result.ret = EAI_FAIL;
+ lookup->event = event_create(client->conn.event);
+ event_set_append_log_prefix(lookup->event, t_strconcat("dns(", param, "): ", NULL));
+ struct event_passthrough *e =
+ event_create_passthrough(lookup->event)->
+ set_name("dns_request_started");
+ e_debug(e->event(), "Lookup started");
+
+ if ((ret = dns_client_send_request(client, cmd, &lookup->result.error)) <= 0) {
+ if (ret == 0) {
+ /* retry once */
+ ret = dns_client_send_request(client, cmd,
+ &lookup->result.error);
+ }
+ if (ret <= 0) {
+ dns_lookup_callback(lookup);
+ dns_lookup_free(&lookup);
+ return -1;
+ }
+ }
+
+ if (client->timeout_msecs != 0) {
+ lookup->to = timeout_add_to(client->ioloop,
+ client->timeout_msecs,
+ dns_lookup_timeout, lookup);
+ }
+ timeout_remove(&client->to_idle);
+ DLLIST2_APPEND(&client->head, &client->tail, lookup);
+ *lookup_r = lookup;
+ return 0;
+}
+
+int dns_client_lookup(struct dns_client *client, const char *host,
+ dns_lookup_callback_t *callback, void *context,
+ struct dns_lookup **lookup_r)
+{
+ return dns_client_lookup_common(client, "IP", host, FALSE,
+ callback, context, lookup_r);
+}
+
+int dns_client_lookup_ptr(struct dns_client *client, const struct ip_addr *ip,
+ dns_lookup_callback_t *callback, void *context,
+ struct dns_lookup **lookup_r)
+{
+ return dns_client_lookup_common(client, "NAME", net_ip2addr(ip), TRUE,
+ callback, context, lookup_r);
+}
+
+void dns_client_switch_ioloop(struct dns_client *client)
+{
+ struct dns_lookup *lookup;
+
+ connection_switch_ioloop(&client->conn);
+ client->to_idle = io_loop_move_timeout(&client->to_idle);
+ client->ioloop = current_ioloop;
+
+ for (lookup = client->head; lookup != NULL; lookup = lookup->next)
+ dns_lookup_switch_ioloop_real(lookup);
+}
diff --git a/src/lib-dns/dns-lookup.h b/src/lib-dns/dns-lookup.h
new file mode 100644
index 0000000..38d65f6
--- /dev/null
+++ b/src/lib-dns/dns-lookup.h
@@ -0,0 +1,90 @@
+#ifndef DNS_LOOKUP_H
+#define DNS_LOOKUP_H
+
+#define DNS_CLIENT_SOCKET_NAME "dns-client"
+
+struct dns_lookup;
+
+struct dns_lookup_settings {
+ const char *dns_client_socket_path;
+ unsigned int timeout_msecs;
+ /* the idle_timeout_msecs works only with the dns_client_* API.
+ 0 = disconnect immediately */
+ unsigned int idle_timeout_msecs;
+
+ /* ioloop to run the lookup on (defaults to current_ioloop) */
+ struct ioloop *ioloop;
+ struct event *event_parent;
+};
+
+struct dns_lookup_result {
+ /* all is ok if ret=0, otherwise it contains net_gethosterror()
+ compatible error code. error string is always set if ret != 0. */
+ int ret;
+ const char *error;
+
+ /* how many milliseconds the lookup took. */
+ unsigned int msecs;
+
+ /* for IP lookup: */
+ unsigned int ips_count;
+ const struct ip_addr *ips;
+ /* for PTR lookup: */
+ const char *name;
+};
+
+typedef void dns_lookup_callback_t(const struct dns_lookup_result *result,
+ void *context);
+
+/* Do asynchronous DNS lookup via dns-client UNIX socket. Returns 0 if lookup
+ started, -1 if there was an error communicating with the UNIX socket.
+ When failing with -1, the callback is called before returning from the
+ function. */
+int dns_lookup(const char *host, const struct dns_lookup_settings *set,
+ dns_lookup_callback_t *callback, void *context,
+ struct dns_lookup **lookup_r) ATTR_NULL(4);
+#define dns_lookup(host, set, callback, context, lookup_r) \
+ dns_lookup(host - \
+ CALLBACK_TYPECHECK(callback, void (*)( \
+ const struct dns_lookup_result *, typeof(context))), \
+ set, (dns_lookup_callback_t *)callback, context, lookup_r)
+int dns_lookup_ptr(const struct ip_addr *ip,
+ const struct dns_lookup_settings *set,
+ dns_lookup_callback_t *callback, void *context,
+ struct dns_lookup **lookup_r) ATTR_NULL(4);
+#define dns_lookup_ptr(host, set, callback, context, lookup_r) \
+ dns_lookup_ptr(host - \
+ CALLBACK_TYPECHECK(callback, void (*)( \
+ const struct dns_lookup_result *, typeof(context))), \
+ set, (dns_lookup_callback_t *)callback, context, lookup_r)
+/* Abort the DNS lookup without calling the callback. */
+void dns_lookup_abort(struct dns_lookup **lookup);
+
+void dns_lookup_switch_ioloop(struct dns_lookup *lookup);
+
+/* Alternative API for clients that need to do multiple DNS lookups. */
+struct dns_client *dns_client_init(const struct dns_lookup_settings *set);
+void dns_client_deinit(struct dns_client **client);
+
+/* Connect immediately to the dns-lookup socket. */
+int dns_client_connect(struct dns_client *client, const char **error_r);
+int dns_client_lookup(struct dns_client *client, const char *host,
+ dns_lookup_callback_t *callback, void *context,
+ struct dns_lookup **lookup_r) ATTR_NULL(4);
+#define dns_client_lookup(client, host, callback, context, lookup_r) \
+ dns_client_lookup(client, host - \
+ CALLBACK_TYPECHECK(callback, void (*)( \
+ const struct dns_lookup_result *, typeof(context))), \
+ (dns_lookup_callback_t *)callback, context, lookup_r)
+int dns_client_lookup_ptr(struct dns_client *client, const struct ip_addr *ip,
+ dns_lookup_callback_t *callback, void *context,
+ struct dns_lookup **lookup_r) ATTR_NULL(4);
+#define dns_client_lookup_ptr(client, host, callback, context, lookup_r) \
+ dns_client_lookup_ptr(client, host - \
+ CALLBACK_TYPECHECK(callback, void (*)( \
+ const struct dns_lookup_result *, typeof(context))), \
+ (dns_lookup_callback_t *)callback, context, lookup_r)
+
+void dns_client_switch_ioloop(struct dns_client *client);
+
+#endif
diff --git a/src/lib-dns/dns-util.c b/src/lib-dns/dns-util.c
new file mode 100644
index 0000000..a8469ce
--- /dev/null
+++ b/src/lib-dns/dns-util.c
@@ -0,0 +1,85 @@
+/* Copyright (c) 2010-2018 Dovecot authors, see the included COPYING file */
+#include "lib.h"
+#include "dns-util.h"
+
+/**
+ return first position from b->a of c or a if not found
+ */
+static inline
+const char *strchr_ba(const char *a, const char *b, char c)
+{
+ for(;b>a && *b != c; b--);
+ return b;
+}
+
+int dns_ncompare(const char *a, const char *b, size_t n)
+{
+ if (a == NULL && b == NULL) return 0;
+ if (a == NULL && b != NULL) return 1;
+ if (a != NULL && b == NULL) return -1;
+
+ for(size_t i = 0; i < n &&
+ *a != '\0' &&
+ *b != '\0' &&
+ dns_tolower(*a) == dns_tolower(*b);
+ i++, a++, b++);
+
+ return dns_tolower(*a) - dns_tolower(*b);
+}
+
+int dns_compare(const char *a, const char *b)
+{
+ return dns_ncompare(a, b, SIZE_MAX);
+}
+
+int dns_compare_labels(const char *a, const char *b)
+{
+ if (a == NULL && b == NULL) return 0;
+ if (a == NULL && b != NULL) return 1;
+ if (a != NULL && b == NULL) return -1;
+
+ const char *ptr_a = a + strlen(a);
+ const char *ptr_b = b + strlen(b);
+ const char *label_a = ptr_a, *label_b = ptr_b;
+ int comp = 0;
+
+ while(comp == 0 && ptr_a > a && ptr_b > b) {
+ /* look for start of label, including dot */
+ label_a = strchr_ba(a, ptr_a, '.');
+ label_b = strchr_ba(b, ptr_b, '.');
+ if (ptr_a - label_a != ptr_b - label_b)
+ /* compare labels up to minimum length
+ but include \0 to make sure that we
+ don't consider alpha and alphabet
+ equal */
+ return dns_ncompare(label_a, label_b,
+ I_MIN(ptr_a - label_a,
+ ptr_b - label_b)+1);
+ comp = dns_ncompare(label_a, label_b, ptr_a -label_a);
+ ptr_a = label_a - 1;
+ ptr_b = label_b - 1;
+ }
+
+ return dns_tolower(*label_a) - dns_tolower(*label_b);
+}
+
+int dns_match_wildcard(const char *name, const char *mask)
+{
+ i_assert(name != NULL && mask != NULL);
+
+ for(;*name != '\0' && *mask != '\0'; name++, mask++) {
+ switch(*mask) {
+ case '*':
+ name = strchr(name, '.');
+ if (name == NULL || mask[1] != '.') return -1;
+ mask++;
+ break;
+ case '?':
+ break;
+ default:
+ if (dns_tolower(*name) != dns_tolower(*mask)) return -1;
+ }
+ }
+ if (*mask == '*') mask++;
+ return dns_tolower(*name) == dns_tolower(*mask) ? 0 : -1;
+}
diff --git a/src/lib-dns/dns-util.h b/src/lib-dns/dns-util.h
new file mode 100644
index 0000000..cff52ff
--- /dev/null
+++ b/src/lib-dns/dns-util.h
@@ -0,0 +1,36 @@
+#ifndef DNS_UTIL_H
+#define DNS_UTIL_H 1
+
+static inline char
+dns_tolower(char c)
+{
+ if (c >= 'A' && c <= 'Z')
+ c+='a'-'A';
+ return c;
+}
+
+/**
+ * Will compare names in accordance with RFC4343
+ */
+int dns_compare(const char *a, const char *b) ATTR_PURE;
+int dns_ncompare(const char *a, const char *b, size_t n) ATTR_PURE;
+
+/**
+ * Same as above but done by labels from right to left
+ *
+ * www.example.org and www.example.net would be compared as
+ * org = net (return first difference)
+ * example = example
+ * www = www
+ */
+int dns_compare_labels(const char *a, const char *b) ATTR_PURE;
+
+/**
+ * Will match names in RFC4592 style
+ *
+ * this means *.foo.bar will match name.foo.bar
+ * but *DOES NOT* match something.name.foo.bar
+ */
+int dns_match_wildcard(const char *name, const char *mask) ATTR_PURE;
+
+#endif
diff --git a/src/lib-dns/test-dns-util.c b/src/lib-dns/test-dns-util.c
new file mode 100644
index 0000000..15d5047
--- /dev/null
+++ b/src/lib-dns/test-dns-util.c
@@ -0,0 +1,124 @@
+/* Copyright (c) 2016-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "test-lib.h"
+#include "dns-util.h"
+#include "array.h"
+
+static void test_dns_compare(void)
+{
+ static const struct {
+ const char *a;
+ const char *b;
+ int res;
+ } tests[] =
+ {
+ { NULL, NULL, 0 },
+ { NULL, "", 1 },
+ { "", NULL, -1 },
+ { "", "", 0 },
+ { "a", "a", 0 },
+ { "a", "b", -1 },
+ { "b", "a", 1 },
+ { "A", "A", 0 },
+ { "A", "B", -1 },
+ { "B", "A", 1 },
+ { "A", "a", 0 },
+ { "a", "B", -1 },
+ { "B", "a", 1 },
+ { "test.invalid", "TeSt.InVaLid", 0 },
+ { "alphabet.com", "alpha.com", 52 },
+ { "com.alphabet", "com.alpha", 98 },
+ { "com.com", "com.comcom", -99 },
+ };
+
+ test_begin("test_dns_compare");
+
+ for(size_t i = 0; i < N_ELEMENTS(tests); i++) {
+ test_assert_idx(dns_compare(tests[i].a, tests[i].b) == tests[i].res, i);
+ test_assert_idx(dns_compare_labels(tests[i].a, tests[i].b) == tests[i].res, i);
+ }
+
+ test_end();
+}
+
+static void test_dns_match(void)
+{
+ static const struct {
+ const char *name;
+ const char *mask;
+ int res;
+ } tests[] =
+ {
+ { "", "", 0 },
+ { "", "*", 0 },
+ { "*", "", -1 },
+ { "TeSt.InVaLid", "test.invalid", 0 },
+ { "contoso.com", "test.invalid", -1 },
+ { "test.invalid", "test.unvalid", -1 },
+ { "name.test.invalid", "*.test.invalid", 0 },
+ { "real.name.test.invalid", "*.test.invalid", -1 },
+ { "real.name.test.invalid", "*.*.test.invalid", 0 },
+ { "name.test.invalid", "*name*.test.invalid", -1 },
+ { "name.invalid", "name.*", -1 },
+ };
+
+ test_begin("test_dns_match");
+
+ for(size_t i = 0; i < N_ELEMENTS(tests); i++) {
+ test_assert_idx(dns_match_wildcard(tests[i].name, tests[i].mask) == tests[i].res, i);
+ }
+
+ test_end();
+}
+
+static int
+arr_dns_compare(const char *const *a, const char *const *b)
+{
+ return dns_compare_labels(*a,*b);
+}
+
+static void test_dns_sort(void)
+{
+ const char *input[] = {
+ "test.invalid",
+ "test.com",
+ "test.contoso.com",
+ "test.alphabet.com",
+ "test.xxx",
+ };
+
+ const char *output[] = {
+ "test.alphabet.com",
+ "test.contoso.com",
+ "test.com",
+ "test.invalid",
+ "test.xxx",
+ };
+
+ test_begin("test_dns_sort");
+
+ ARRAY_TYPE(const_string) arr;
+ t_array_init(&arr, 8);
+
+ array_append(&arr, input, N_ELEMENTS(input));
+
+ array_sort(&arr, arr_dns_compare);
+
+ for(size_t i = 0; i < N_ELEMENTS(output); i++) {
+ const char *str = array_idx_elem(&arr, i);
+ test_assert_idx(dns_compare(str, output[i]) == 0, i);
+ }
+
+ test_end();
+}
+
+int main(void) {
+ void (*const test_functions[])(void) = {
+ test_dns_compare,
+ test_dns_match,
+ test_dns_sort,
+ NULL
+ };
+ return test_run(test_functions);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 02:11:09 +0000