This change brings in PJSIP 2.8, removes all the patches that were merged upstream, and makes a minor change to support a breaking change that was done. ASTERISK-28059 Change-Id: I5097772b11b0f95c3c1f52df6400158666f0a189
312 lines
9.8 KiB
C
312 lines
9.8 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2013, Digium, Inc.
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*
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* Mark Michelson <mmichelson@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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#include "asterisk.h"
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#include <pjsip.h>
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#include <pjlib.h>
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#include "asterisk/res_pjsip.h"
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#include "asterisk/sorcery.h"
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#include "include/res_pjsip_private.h"
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#include "asterisk/threadpool.h"
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#include "asterisk/dns.h"
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#include "asterisk/res_pjsip_cli.h"
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#define TIMER_T1_MIN 100
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#define DEFAULT_TIMER_T1 500
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#define DEFAULT_TIMER_B 32000
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struct system_config {
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SORCERY_OBJECT(details);
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/*! Transaction Timer T1 value */
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unsigned int timert1;
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/*! Transaction Timer B value */
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unsigned int timerb;
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/*! Should we use short forms for headers? */
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unsigned int compactheaders;
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struct {
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/*! Initial number of threads in the threadpool */
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int initial_size;
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/*! The amount by which the number of threads is incremented when necessary */
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int auto_increment;
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/*! Thread idle timeout in seconds */
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int idle_timeout;
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/*! Maxumum number of threads in the threadpool */
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int max_size;
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} threadpool;
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/*! Nonzero to disable switching from UDP to TCP transport */
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unsigned int disable_tcp_switch;
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/*!
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* Although early media is enabled in pjproject by default, it's only
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* enabled when the To tags are different. These options allow turning
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* on or off the feature for different tags and same tags.
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*/
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unsigned int follow_early_media_fork;
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unsigned int accept_multiple_sdp_answers;
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};
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static struct ast_threadpool_options sip_threadpool_options = {
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.version = AST_THREADPOOL_OPTIONS_VERSION,
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};
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void sip_get_threadpool_options(struct ast_threadpool_options *threadpool_options)
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{
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*threadpool_options = sip_threadpool_options;
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}
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static struct ast_sorcery *system_sorcery;
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static void *system_alloc(const char *name)
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{
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struct system_config *system = ast_sorcery_generic_alloc(sizeof(*system), NULL);
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if (!system) {
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return NULL;
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}
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return system;
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}
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static int system_apply(const struct ast_sorcery *system_sorcery, void *obj)
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{
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struct system_config *system = obj;
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int min_timerb;
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if (system->timert1 < TIMER_T1_MIN) {
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ast_log(LOG_WARNING, "Timer T1 setting is too low. Setting to %d\n", TIMER_T1_MIN);
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system->timert1 = TIMER_T1_MIN;
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}
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min_timerb = 64 * system->timert1;
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if (system->timerb < min_timerb) {
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ast_log(LOG_WARNING, "Timer B setting is too low. Setting to %d\n", min_timerb);
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system->timerb = min_timerb;
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}
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pjsip_cfg()->tsx.t1 = system->timert1;
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pjsip_cfg()->tsx.td = system->timerb;
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pjsip_cfg()->endpt.follow_early_media_fork = system->follow_early_media_fork;
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#ifdef HAVE_PJSIP_INV_ACCEPT_MULTIPLE_SDP_ANSWERS
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pjsip_cfg()->endpt.accept_multiple_sdp_answers = system->accept_multiple_sdp_answers;
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#else
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if (system->accept_multiple_sdp_answers) {
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ast_log(LOG_WARNING,
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"The accept_multiple_sdp_answers flag is not supported in this version of pjproject. Ignoring\n");
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}
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#endif
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if (system->compactheaders) {
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#ifdef HAVE_PJSIP_ENDPOINT_COMPACT_FORM
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pjsip_cfg()->endpt.use_compact_form = PJ_TRUE;
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#else
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extern pj_bool_t pjsip_use_compact_form;
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pjsip_use_compact_form = PJ_TRUE;
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#endif
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}
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sip_threadpool_options.initial_size = system->threadpool.initial_size;
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sip_threadpool_options.auto_increment = system->threadpool.auto_increment;
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sip_threadpool_options.idle_timeout = system->threadpool.idle_timeout;
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sip_threadpool_options.max_size = system->threadpool.max_size;
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pjsip_cfg()->endpt.disable_tcp_switch =
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system->disable_tcp_switch ? PJ_TRUE : PJ_FALSE;
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return 0;
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}
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static struct system_config *get_system_cfg(void)
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{
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struct system_config *cfg;
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struct ao2_container *systems;
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systems = ast_sorcery_retrieve_by_fields(system_sorcery, "system",
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AST_RETRIEVE_FLAG_MULTIPLE | AST_RETRIEVE_FLAG_ALL, NULL);
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if (!systems) {
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return NULL;
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}
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cfg = ao2_find(systems, NULL, 0);
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ao2_ref(systems, -1);
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return cfg;
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}
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int sip_cli_print_system(struct ast_sip_cli_context *context)
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{
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struct system_config *cfg = get_system_cfg();
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if (!cfg) {
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cfg = ast_sorcery_alloc(system_sorcery, "system", NULL);
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if (!cfg) {
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return -1;
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}
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}
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ast_str_append(&context->output_buffer, 0, "\nSystem Settings:\n\n");
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ast_sip_cli_print_sorcery_objectset(cfg, context, 0);
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ao2_ref(cfg, -1);
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return 0;
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}
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int ast_sip_initialize_system(void)
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{
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RAII_VAR(struct ao2_container *, system_configs, NULL, ao2_cleanup);
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RAII_VAR(struct system_config *, system, NULL, ao2_cleanup);
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system_sorcery = ast_sorcery_open();
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if (!system_sorcery) {
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ast_log(LOG_ERROR, "Failed to open SIP system sorcery\n");
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return -1;
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}
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ast_sorcery_apply_default(system_sorcery, "system", "config", "pjsip.conf,criteria=type=system,single_object=yes,explicit_name=system");
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if (ast_sorcery_object_register_no_reload(system_sorcery, "system", system_alloc, NULL, system_apply)) {
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ast_log(LOG_ERROR, "Failed to register with sorcery (is res_sorcery_config loaded?)\n");
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ast_sorcery_unref(system_sorcery);
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system_sorcery = NULL;
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return -1;
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}
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ast_sorcery_object_field_register(system_sorcery, "system", "type", "", OPT_NOOP_T, 0, 0);
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ast_sorcery_object_field_register(system_sorcery, "system", "timer_t1", __stringify(DEFAULT_TIMER_T1),
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OPT_UINT_T, 0, FLDSET(struct system_config, timert1));
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ast_sorcery_object_field_register(system_sorcery, "system", "timer_b", __stringify(DEFAULT_TIMER_B),
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OPT_UINT_T, 0, FLDSET(struct system_config, timerb));
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ast_sorcery_object_field_register(system_sorcery, "system", "compact_headers", "no",
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OPT_BOOL_T, 1, FLDSET(struct system_config, compactheaders));
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ast_sorcery_object_field_register(system_sorcery, "system", "threadpool_initial_size", "0",
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OPT_UINT_T, 0, FLDSET(struct system_config, threadpool.initial_size));
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ast_sorcery_object_field_register(system_sorcery, "system", "threadpool_auto_increment", "5",
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OPT_UINT_T, 0, FLDSET(struct system_config, threadpool.auto_increment));
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ast_sorcery_object_field_register(system_sorcery, "system", "threadpool_idle_timeout", "60",
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OPT_UINT_T, 0, FLDSET(struct system_config, threadpool.idle_timeout));
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ast_sorcery_object_field_register(system_sorcery, "system", "threadpool_max_size", "50",
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OPT_UINT_T, 0, FLDSET(struct system_config, threadpool.max_size));
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ast_sorcery_object_field_register(system_sorcery, "system", "disable_tcp_switch", "yes",
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OPT_BOOL_T, 1, FLDSET(struct system_config, disable_tcp_switch));
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ast_sorcery_object_field_register(system_sorcery, "system", "follow_early_media_fork", "yes",
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OPT_BOOL_T, 1, FLDSET(struct system_config, follow_early_media_fork));
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ast_sorcery_object_field_register(system_sorcery, "system", "accept_multiple_sdp_answers", "no",
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OPT_BOOL_T, 1, FLDSET(struct system_config, accept_multiple_sdp_answers));
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ast_sorcery_load(system_sorcery);
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system_configs = ast_sorcery_retrieve_by_fields(system_sorcery, "system",
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AST_RETRIEVE_FLAG_MULTIPLE | AST_RETRIEVE_FLAG_ALL, NULL);
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if (ao2_container_count(system_configs)) {
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return 0;
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}
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/* No config present, allocate one and apply defaults */
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system = ast_sorcery_alloc(system_sorcery, "system", NULL);
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if (!system) {
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ast_log(LOG_ERROR, "Unable to allocate default system config.\n");
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ast_sorcery_unref(system_sorcery);
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return -1;
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}
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if (system_apply(system_sorcery, system)) {
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ast_log(LOG_ERROR, "Failed to apply default system config.\n");
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ast_sorcery_unref(system_sorcery);
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return -1;
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}
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return 0;
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}
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void ast_sip_destroy_system(void)
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{
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ast_sorcery_unref(system_sorcery);
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}
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static int system_create_resolver_and_set_nameservers(void *data)
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{
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struct ao2_container *discovered_nameservers;
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struct ao2_iterator it_nameservers;
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char *nameserver;
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pj_status_t status;
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pj_dns_resolver *resolver;
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pj_str_t nameservers[PJ_DNS_RESOLVER_MAX_NS];
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unsigned int count = 0;
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discovered_nameservers = ast_dns_get_nameservers();
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if (!discovered_nameservers) {
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ast_log(LOG_ERROR, "Could not retrieve local system nameservers, resorting to system resolution\n");
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return 0;
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}
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if (!ao2_container_count(discovered_nameservers)) {
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ast_log(LOG_ERROR, "There are no local system nameservers configured, resorting to system resolution\n");
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ao2_ref(discovered_nameservers, -1);
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return -1;
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}
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if (!(resolver = pjsip_endpt_get_resolver(ast_sip_get_pjsip_endpoint()))) {
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status = pjsip_endpt_create_resolver(ast_sip_get_pjsip_endpoint(), &resolver);
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if (status != PJ_SUCCESS) {
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ast_log(LOG_ERROR, "Could not create DNS resolver(%d), resorting to system resolution\n", status);
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ao2_ref(discovered_nameservers, -1);
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return 0;
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}
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}
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it_nameservers = ao2_iterator_init(discovered_nameservers, 0);
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while ((nameserver = ao2_iterator_next(&it_nameservers))) {
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pj_strset2(&nameservers[count++], nameserver);
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ao2_ref(nameserver, -1);
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if (count == (PJ_DNS_RESOLVER_MAX_NS - 1)) {
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break;
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}
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}
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ao2_iterator_destroy(&it_nameservers);
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status = pj_dns_resolver_set_ns(resolver, count, nameservers, NULL);
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/* Since we no longer need the nameservers we can drop the list of them */
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ao2_ref(discovered_nameservers, -1);
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if (status != PJ_SUCCESS) {
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ast_log(LOG_ERROR, "Could not set nameservers on DNS resolver in PJSIP(%d), resorting to system resolution\n",
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status);
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return 0;
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}
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if (!pjsip_endpt_get_resolver(ast_sip_get_pjsip_endpoint())) {
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status = pjsip_endpt_set_resolver(ast_sip_get_pjsip_endpoint(), resolver);
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if (status != PJ_SUCCESS) {
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ast_log(LOG_ERROR, "Could not set DNS resolver in PJSIP(%d), resorting to system resolution\n", status);
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return 0;
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}
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}
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return 0;
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}
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void ast_sip_initialize_dns(void)
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{
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ast_sip_push_task_wait_servant(NULL, system_create_resolver_and_set_nameservers, NULL);
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}
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