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-rw-r--r--1.2-netsec/dnsmgr.c371
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diff --git a/1.2-netsec/dnsmgr.c b/1.2-netsec/dnsmgr.c
deleted file mode 100644
index f1a9dbe59..000000000
--- a/1.2-netsec/dnsmgr.c
+++ /dev/null
@@ -1,371 +0,0 @@
-/*
- * Asterisk -- An open source telephony toolkit.
- *
- * Copyright (C) 2005-2006, Kevin P. Fleming
- *
- * Kevin P. Fleming <kpfleming@digium.com>
- *
- * See http://www.asterisk.org for more information about
- * the Asterisk project. Please do not directly contact
- * any of the maintainers of this project for assistance;
- * the project provides a web site, mailing lists and IRC
- * channels for your use.
- *
- * This program is free software, distributed under the terms of
- * the GNU General Public License Version 2. See the LICENSE file
- * at the top of the source tree.
- */
-
-/*! \file
- *
- * \brief Background DNS update manager
- *
- */
-
-#include <sys/types.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <arpa/inet.h>
-#include <resolv.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <regex.h>
-#include <signal.h>
-
-#include "asterisk.h"
-
-ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
-
-#include "asterisk/dnsmgr.h"
-#include "asterisk/linkedlists.h"
-#include "asterisk/utils.h"
-#include "asterisk/config.h"
-#include "asterisk/logger.h"
-#include "asterisk/sched.h"
-#include "asterisk/options.h"
-#include "asterisk/cli.h"
-
-static struct sched_context *sched;
-static int refresh_sched = -1;
-static pthread_t refresh_thread = AST_PTHREADT_NULL;
-
-struct ast_dnsmgr_entry {
- struct in_addr *result;
- AST_LIST_ENTRY(ast_dnsmgr_entry) list;
- char name[1];
-};
-
-static AST_LIST_HEAD(entry_list, ast_dnsmgr_entry) entry_list;
-
-AST_MUTEX_DEFINE_STATIC(refresh_lock);
-
-#define REFRESH_DEFAULT 300
-
-static int enabled = 0;
-static int refresh_interval;
-
-struct refresh_info {
- struct entry_list *entries;
- int verbose;
- unsigned int regex_present:1;
- regex_t filter;
-};
-
-static struct refresh_info master_refresh_info = {
- .entries = &entry_list,
- .verbose = 0,
-};
-
-struct ast_dnsmgr_entry *ast_dnsmgr_get(const char *name, struct in_addr *result)
-{
- struct ast_dnsmgr_entry *entry;
-
- if (!result || ast_strlen_zero(name))
- return NULL;
-
- entry = calloc(1, sizeof(*entry) + strlen(name));
- if (!entry)
- return NULL;
-
- entry->result = result;
- strcpy(entry->name, name);
-
- AST_LIST_LOCK(&entry_list);
- AST_LIST_INSERT_HEAD(&entry_list, entry, list);
- AST_LIST_UNLOCK(&entry_list);
-
- return entry;
-}
-
-void ast_dnsmgr_release(struct ast_dnsmgr_entry *entry)
-{
- if (!entry)
- return;
-
- AST_LIST_LOCK(&entry_list);
- AST_LIST_REMOVE(&entry_list, entry, list);
- AST_LIST_UNLOCK(&entry_list);
- free(entry);
-}
-
-int ast_dnsmgr_lookup(const char *name, struct in_addr *result, struct ast_dnsmgr_entry **dnsmgr)
-{
- if (ast_strlen_zero(name) || !result || !dnsmgr)
- return -1;
-
- if (*dnsmgr && !strcasecmp((*dnsmgr)->name, name))
- return 0;
-
- if (option_verbose > 3)
- ast_verbose(VERBOSE_PREFIX_3 "doing lookup for '%s'\n", name);
-
- /* if it's actually an IP address and not a name,
- there's no need for a managed lookup */
- if (inet_aton(name, result))
- return 0;
-
- /* if the manager is disabled, do a direct lookup and return the result,
- otherwise register a managed lookup for the name */
- if (!enabled) {
- struct ast_hostent ahp;
- struct hostent *hp;
-
- if ((hp = ast_gethostbyname(name, &ahp)))
- memcpy(result, hp->h_addr, sizeof(result));
- return 0;
- } else {
- if (option_verbose > 2)
- ast_verbose(VERBOSE_PREFIX_2 "adding manager for '%s'\n", name);
- *dnsmgr = ast_dnsmgr_get(name, result);
- return !*dnsmgr;
- }
-}
-
-static void *do_refresh(void *data)
-{
- for (;;) {
- pthread_testcancel();
- usleep(ast_sched_wait(sched));
- pthread_testcancel();
- ast_sched_runq(sched);
- }
- return NULL;
-}
-
-static int refresh_list(void *data)
-{
- struct refresh_info *info = data;
- struct ast_dnsmgr_entry *entry;
- struct ast_hostent ahp;
- struct hostent *hp;
-
- /* if a refresh or reload is already in progress, exit now */
- if (ast_mutex_trylock(&refresh_lock)) {
- if (info->verbose)
- ast_log(LOG_WARNING, "DNS Manager refresh already in progress.\n");
- return -1;
- }
-
- if (option_verbose > 2)
- ast_verbose(VERBOSE_PREFIX_2 "Refreshing DNS lookups.\n");
- AST_LIST_LOCK(info->entries);
- AST_LIST_TRAVERSE(info->entries, entry, list) {
- if (info->regex_present && regexec(&info->filter, entry->name, 0, NULL, 0))
- continue;
-
- if (info->verbose && (option_verbose > 2))
- ast_verbose(VERBOSE_PREFIX_2 "refreshing '%s'\n", entry->name);
-
- if ((hp = ast_gethostbyname(entry->name, &ahp))) {
- /* check to see if it has changed, do callback if requested */
- memcpy(entry->result, hp->h_addr, sizeof(entry->result));
- }
- }
- AST_LIST_UNLOCK(info->entries);
-
- ast_mutex_unlock(&refresh_lock);
-
- /* automatically reschedule based on the interval */
- return refresh_interval * 1000;
-}
-
-void dnsmgr_start_refresh(void)
-{
- if (refresh_sched > -1) {
- ast_sched_del(sched, refresh_sched);
- refresh_sched = ast_sched_add_variable(sched, 100, refresh_list, &master_refresh_info, 1);
- }
-}
-
-static int do_reload(int loading);
-
-static int handle_cli_reload(int fd, int argc, char *argv[])
-{
- if (argc > 2)
- return RESULT_SHOWUSAGE;
-
- do_reload(0);
- return 0;
-}
-
-static int handle_cli_refresh(int fd, int argc, char *argv[])
-{
- struct refresh_info info = {
- .entries = &entry_list,
- .verbose = 1,
- };
-
- if (argc > 3)
- return RESULT_SHOWUSAGE;
-
- if (argc == 3) {
- if (regcomp(&info.filter, argv[2], REG_EXTENDED | REG_NOSUB))
- return RESULT_SHOWUSAGE;
- else
- info.regex_present = 1;
- }
-
- refresh_list(&info);
-
- if (info.regex_present)
- regfree(&info.filter);
-
- return 0;
-}
-
-static int handle_cli_status(int fd, int argc, char *argv[])
-{
- int count = 0;
- struct ast_dnsmgr_entry *entry;
-
- if (argc > 2)
- return RESULT_SHOWUSAGE;
-
- ast_cli(fd, "DNS Manager: %s\n", enabled ? "enabled" : "disabled");
- ast_cli(fd, "Refresh Interval: %d seconds\n", refresh_interval);
- AST_LIST_LOCK(&entry_list);
- AST_LIST_TRAVERSE(&entry_list, entry, list)
- count++;
- AST_LIST_UNLOCK(&entry_list);
- ast_cli(fd, "Number of entries: %d\n", count);
-
- return 0;
-}
-
-static struct ast_cli_entry cli_reload = {
- .cmda = { "dnsmgr", "reload", NULL },
- .handler = handle_cli_reload,
- .summary = "Reloads the DNS manager configuration",
- .usage =
- "Usage: dnsmgr reload\n"
- " Reloads the DNS manager configuration.\n"
-};
-
-static struct ast_cli_entry cli_refresh = {
- .cmda = { "dnsmgr", "refresh", NULL },
- .handler = handle_cli_refresh,
- .summary = "Performs an immediate refresh",
- .usage =
- "Usage: dnsmgr refresh [pattern]\n"
- " Peforms an immediate refresh of the managed DNS entries.\n"
- " Optional regular expression pattern is used to filter the entries to refresh.\n",
-};
-
-static struct ast_cli_entry cli_status = {
- .cmda = { "dnsmgr", "status", NULL },
- .handler = handle_cli_status,
- .summary = "Display the DNS manager status",
- .usage =
- "Usage: dnsmgr status\n"
- " Displays the DNS manager status.\n"
-};
-
-int dnsmgr_init(void)
-{
- sched = sched_context_create();
- if (!sched) {
- ast_log(LOG_ERROR, "Unable to create schedule context.\n");
- return -1;
- }
- AST_LIST_HEAD_INIT(&entry_list);
- ast_cli_register(&cli_reload);
- ast_cli_register(&cli_status);
- return do_reload(1);
-}
-
-void dnsmgr_reload(void)
-{
- do_reload(0);
-}
-
-static int do_reload(int loading)
-{
- struct ast_config *config;
- const char *interval_value;
- const char *enabled_value;
- int interval;
- int was_enabled;
- int res = -1;
-
- /* ensure that no refresh cycles run while the reload is in progress */
- ast_mutex_lock(&refresh_lock);
-
- /* reset defaults in preparation for reading config file */
- refresh_interval = REFRESH_DEFAULT;
- was_enabled = enabled;
- enabled = 0;
-
- if (refresh_sched > -1)
- ast_sched_del(sched, refresh_sched);
-
- if ((config = ast_config_load("dnsmgr.conf"))) {
- if ((enabled_value = ast_variable_retrieve(config, "general", "enable"))) {
- enabled = ast_true(enabled_value);
- }
- if ((interval_value = ast_variable_retrieve(config, "general", "refreshinterval"))) {
- if (sscanf(interval_value, "%d", &interval) < 1)
- ast_log(LOG_WARNING, "Unable to convert '%s' to a numeric value.\n", interval_value);
- else if (interval < 0)
- ast_log(LOG_WARNING, "Invalid refresh interval '%d' specified, using default\n", interval);
- else
- refresh_interval = interval;
- }
- ast_config_destroy(config);
- }
-
- if (enabled && refresh_interval)
- ast_log(LOG_NOTICE, "Managed DNS entries will be refreshed every %d seconds.\n", refresh_interval);
-
- /* if this reload enabled the manager, create the background thread
- if it does not exist */
- if (enabled && !was_enabled && (refresh_thread == AST_PTHREADT_NULL)) {
- if (ast_pthread_create(&refresh_thread, NULL, do_refresh, NULL) < 0) {
- ast_log(LOG_ERROR, "Unable to start refresh thread.\n");
- }
- else {
- ast_cli_register(&cli_refresh);
- /* make a background refresh happen right away */
- refresh_sched = ast_sched_add_variable(sched, 100, refresh_list, &master_refresh_info, 1);
- res = 0;
- }
- }
- /* if this reload disabled the manager and there is a background thread,
- kill it */
- else if (!enabled && was_enabled && (refresh_thread != AST_PTHREADT_NULL)) {
- /* wake up the thread so it will exit */
- pthread_cancel(refresh_thread);
- pthread_kill(refresh_thread, SIGURG);
- pthread_join(refresh_thread, NULL);
- refresh_thread = AST_PTHREADT_NULL;
- ast_cli_unregister(&cli_refresh);
- res = 0;
- }
- else
- res = 0;
-
- ast_mutex_unlock(&refresh_lock);
-
- return res;
-}