config_system.c File Reference

#include "asterisk.h"
#include <pjsip.h>
#include <pjlib.h>
#include "asterisk/res_pjsip.h"
#include "asterisk/sorcery.h"
#include "include/res_pjsip_private.h"
#include "asterisk/threadpool.h"
#include "asterisk/dns.h"
#include "asterisk/res_pjsip_cli.h"

Include dependency graph for config_system.c:

Go to the source code of this file.

Data Structures
struct	system_config

Macros
#define	DEFAULT_TIMER_B   32000
#define	DEFAULT_TIMER_T1   500
#define	TIMER_T1_MIN   100

Functions
void	ast_sip_destroy_system (void)
void	ast_sip_initialize_dns (void)
int	ast_sip_initialize_system (void)
static struct system_config *	get_system_cfg (void)
int	sip_cli_print_system (struct ast_sip_cli_context *context)
void	sip_get_threadpool_options (struct ast_threadpool_options *threadpool_options)
static void *	system_alloc (const char *name)
static int	system_apply (const struct ast_sorcery *sorcery, void *obj)
static int	system_create_resolver_and_set_nameservers (void *data)

Variables
static struct ast_threadpool_options	sip_threadpool_options
static struct ast_sorcery *	system_sorcery

Macro Definition Documentation

DEFAULT_TIMER_B

#define DEFAULT_TIMER_B   32000

Definition at line 33 of file config_system.c.

Referenced by ast_sip_initialize_system().

DEFAULT_TIMER_T1

#define DEFAULT_TIMER_T1   500

Definition at line 32 of file config_system.c.

Referenced by ast_sip_initialize_system().

TIMER_T1_MIN

#define TIMER_T1_MIN   100

Definition at line 31 of file config_system.c.

Referenced by system_apply().

Function Documentation

ast_sip_destroy_system()

void ast_sip_destroy_system

(

void

)

Definition at line 245 of file config_system.c.

References ast_sorcery_unref.

Referenced by unload_pjsip().

{
   ast_sorcery_unref(system_sorcery);
}

ast_sip_initialize_dns()

void ast_sip_initialize_dns

(

void

)

Definition at line 314 of file config_system.c.

References ast_sip_push_task_wait_servant(), NULL, and system_create_resolver_and_set_nameservers().

Referenced by load_module(), and reload_configuration_task().

{
   ast_sip_push_task_wait_servant(NULL, system_create_resolver_and_set_nameservers, NULL);
}

ast_sip_initialize_system()

int ast_sip_initialize_system

(

void

)

Definition at line 175 of file config_system.c.

References __stringify, system_config::accept_multiple_sdp_answers, ao2_cleanup, ao2_container_count(), ast_log, AST_RETRIEVE_FLAG_ALL, AST_RETRIEVE_FLAG_MULTIPLE, ast_sorcery_alloc(), ast_sorcery_apply_default, ast_sorcery_load(), ast_sorcery_object_field_register, ast_sorcery_object_register_no_reload, ast_sorcery_open, ast_sorcery_retrieve_by_fields(), ast_sorcery_unref, system_config::compactheaders, DEFAULT_TIMER_B, DEFAULT_TIMER_T1, system_config::disable_rport, system_config::disable_tcp_switch, FLDSET, system_config::follow_early_media_fork, LOG_ERROR, NULL, OPT_BOOL_T, OPT_NOOP_T, OPT_UINT_T, RAII_VAR, system_alloc(), system_apply(), system_config::threadpool, system_config::timerb, and system_config::timert1.

Referenced by load_module().

{
   RAII_VAR(struct ao2_container *, system_configs, NULL, ao2_cleanup);
   RAII_VAR(struct system_config *, system, NULL, ao2_cleanup);

   system_sorcery = ast_sorcery_open();
   if (!system_sorcery) {
      ast_log(LOG_ERROR, "Failed to open SIP system sorcery\n");
      return -1;
   }

   ast_sorcery_apply_default(system_sorcery, "system", "config", "pjsip.conf,criteria=type=system,single_object=yes,explicit_name=system");

   if (ast_sorcery_object_register_no_reload(system_sorcery, "system", system_alloc, NULL, system_apply)) {
      ast_log(LOG_ERROR, "Failed to register with sorcery (is res_sorcery_config loaded?)\n");
      ast_sorcery_unref(system_sorcery);
      system_sorcery = NULL;
      return -1;
   }

   ast_sorcery_object_field_register(system_sorcery, "system", "type", "", OPT_NOOP_T, 0, 0);
   ast_sorcery_object_field_register(system_sorcery, "system", "timer_t1", __stringify(DEFAULT_TIMER_T1),
         OPT_UINT_T, 0, FLDSET(struct system_config, timert1));
   ast_sorcery_object_field_register(system_sorcery, "system", "timer_b", __stringify(DEFAULT_TIMER_B),
         OPT_UINT_T, 0, FLDSET(struct system_config, timerb));
   ast_sorcery_object_field_register(system_sorcery, "system", "compact_headers", "no",
         OPT_BOOL_T, 1, FLDSET(struct system_config, compactheaders));
   ast_sorcery_object_field_register(system_sorcery, "system", "threadpool_initial_size", "0",
         OPT_UINT_T, 0, FLDSET(struct system_config, threadpool.initial_size));
   ast_sorcery_object_field_register(system_sorcery, "system", "threadpool_auto_increment", "5",
         OPT_UINT_T, 0, FLDSET(struct system_config, threadpool.auto_increment));
   ast_sorcery_object_field_register(system_sorcery, "system", "threadpool_idle_timeout", "60",
         OPT_UINT_T, 0, FLDSET(struct system_config, threadpool.idle_timeout));
   ast_sorcery_object_field_register(system_sorcery, "system", "threadpool_max_size", "50",
         OPT_UINT_T, 0, FLDSET(struct system_config, threadpool.max_size));
   ast_sorcery_object_field_register(system_sorcery, "system", "disable_tcp_switch", "yes",
         OPT_BOOL_T, 1, FLDSET(struct system_config, disable_tcp_switch));
   ast_sorcery_object_field_register(system_sorcery, "system", "follow_early_media_fork", "yes",
         OPT_BOOL_T, 1, FLDSET(struct system_config, follow_early_media_fork));
   ast_sorcery_object_field_register(system_sorcery, "system", "accept_multiple_sdp_answers", "no",
         OPT_BOOL_T, 1, FLDSET(struct system_config, accept_multiple_sdp_answers));
   ast_sorcery_object_field_register(system_sorcery, "system", "disable_rport", "no",
         OPT_BOOL_T, 1, FLDSET(struct system_config, disable_rport));

   ast_sorcery_load(system_sorcery);

   system_configs = ast_sorcery_retrieve_by_fields(system_sorcery, "system",
      AST_RETRIEVE_FLAG_MULTIPLE | AST_RETRIEVE_FLAG_ALL, NULL);

   if (ao2_container_count(system_configs)) {
      return 0;
   }

   /* No config present, allocate one and apply defaults */
   system = ast_sorcery_alloc(system_sorcery, "system", NULL);
   if (!system) {
      ast_log(LOG_ERROR, "Unable to allocate default system config.\n");
      ast_sorcery_unref(system_sorcery);
      return -1;
   }

   if (system_apply(system_sorcery, system)) {
      ast_log(LOG_ERROR, "Failed to apply default system config.\n");
      ast_sorcery_unref(system_sorcery);
      return -1;
   }

   return 0;
}

get_system_cfg()

static struct system_config* get_system_cfg ( void  )

static

Definition at line 141 of file config_system.c.

References ao2_find, ao2_ref, AST_RETRIEVE_FLAG_ALL, AST_RETRIEVE_FLAG_MULTIPLE, ast_sorcery_retrieve_by_fields(), and NULL.

Referenced by sip_cli_print_system().

{
   struct system_config *cfg;
   struct ao2_container *systems;
   systems = ast_sorcery_retrieve_by_fields(system_sorcery, "system",
      AST_RETRIEVE_FLAG_MULTIPLE | AST_RETRIEVE_FLAG_ALL, NULL);

   if (!systems) {
      return NULL;
   }

   cfg = ao2_find(systems, NULL, 0);
   ao2_ref(systems, -1);
   return cfg;
}

sip_cli_print_system()

int sip_cli_print_system

(

struct ast_sip_cli_context *

context

)

Definition at line 157 of file config_system.c.

References ao2_ref, ast_sip_cli_print_sorcery_objectset(), ast_sorcery_alloc(), ast_str_append(), get_system_cfg(), NULL, and ast_sip_cli_context::output_buffer.

Referenced by cli_show_settings().

{
   struct system_config *cfg = get_system_cfg();

   if (!cfg) {
      cfg = ast_sorcery_alloc(system_sorcery, "system", NULL);
      if (!cfg) {
         return -1;
      }
   }

   ast_str_append(&context->output_buffer, 0, "\nSystem Settings:\n\n");
   ast_sip_cli_print_sorcery_objectset(cfg, context, 0);

   ao2_ref(cfg, -1);
   return 0;
}

sip_get_threadpool_options()

void sip_get_threadpool_options

(

struct ast_threadpool_options *

threadpool_options

)

Definition at line 70 of file config_system.c.

References sip_threadpool_options.

Referenced by load_module().

{
   *threadpool_options = sip_threadpool_options;
}

system_alloc()

static void* system_alloc ( const char *  name )

static

Definition at line 77 of file config_system.c.

References ast_sorcery_generic_alloc(), and NULL.

Referenced by ast_sip_initialize_system().

{
   struct system_config *system = ast_sorcery_generic_alloc(sizeof(*system), NULL);

   if (!system) {
      return NULL;
   }

   return system;
}

system_apply()

static int system_apply ( const struct ast_sorcery *  sorcery, void *  obj  )

static

Definition at line 88 of file config_system.c.

References system_config::accept_multiple_sdp_answers, ast_log, system_config::auto_increment, ast_threadpool_options::auto_increment, system_config::compactheaders, system_config::disable_rport, system_config::disable_tcp_switch, system_config::follow_early_media_fork, system_config::idle_timeout, ast_threadpool_options::idle_timeout, system_config::initial_size, ast_threadpool_options::initial_size, LOG_WARNING, system_config::max_size, ast_threadpool_options::max_size, system_config::threadpool, TIMER_T1_MIN, system_config::timerb, and system_config::timert1.

Referenced by ast_sip_initialize_system().

{
   struct system_config *system = obj;
   int min_timerb;

   if (system->timert1 < TIMER_T1_MIN) {
      ast_log(LOG_WARNING, "Timer T1 setting is too low. Setting to %d\n", TIMER_T1_MIN);
      system->timert1 = TIMER_T1_MIN;
   }

   min_timerb = 64 * system->timert1;

   if (system->timerb < min_timerb) {
      ast_log(LOG_WARNING, "Timer B setting is too low. Setting to %d\n", min_timerb);
      system->timerb = min_timerb;
   }

   pjsip_cfg()->tsx.t1 = system->timert1;
   pjsip_cfg()->tsx.td = system->timerb;

   pjsip_cfg()->endpt.follow_early_media_fork = system->follow_early_media_fork;
#ifdef HAVE_PJSIP_INV_ACCEPT_MULTIPLE_SDP_ANSWERS
   pjsip_cfg()->endpt.accept_multiple_sdp_answers = system->accept_multiple_sdp_answers;
#else
   if (system->accept_multiple_sdp_answers) {
      ast_log(LOG_WARNING,
         "The accept_multiple_sdp_answers flag is not supported in this version of pjproject. Ignoring\n");
   }
#endif

   if (system->compactheaders) {
#ifdef HAVE_PJSIP_ENDPOINT_COMPACT_FORM
      pjsip_cfg()->endpt.use_compact_form = PJ_TRUE;
#else
      extern pj_bool_t pjsip_use_compact_form;

      pjsip_use_compact_form = PJ_TRUE;
#endif
   }

   sip_threadpool_options.initial_size = system->threadpool.initial_size;
   sip_threadpool_options.auto_increment = system->threadpool.auto_increment;
   sip_threadpool_options.idle_timeout = system->threadpool.idle_timeout;
   sip_threadpool_options.max_size = system->threadpool.max_size;

   pjsip_cfg()->endpt.disable_tcp_switch =
      system->disable_tcp_switch ? PJ_TRUE : PJ_FALSE;

   pjsip_cfg()->endpt.disable_rport = system->disable_rport ? PJ_TRUE : PJ_FALSE;

   return 0;
}

system_create_resolver_and_set_nameservers()

static int system_create_resolver_and_set_nameservers ( void *  data )

static

Definition at line 250 of file config_system.c.

References ao2_container_count(), ao2_iterator_destroy(), ao2_iterator_init(), ao2_iterator_next, ao2_ref, ast_dns_get_nameservers(), ast_log, ast_sip_get_pjsip_endpoint(), LOG_ERROR, NULL, and status.

Referenced by ast_sip_initialize_dns().

{
   struct ao2_container *discovered_nameservers;
   struct ao2_iterator it_nameservers;
   char *nameserver;
   pj_status_t status;
   pj_dns_resolver *resolver;
   pj_str_t nameservers[PJ_DNS_RESOLVER_MAX_NS];
   unsigned int count = 0;

   discovered_nameservers = ast_dns_get_nameservers();
   if (!discovered_nameservers) {
      ast_log(LOG_ERROR, "Could not retrieve local system nameservers, resorting to system resolution\n");
      return 0;
   }

   if (!ao2_container_count(discovered_nameservers)) {
      ast_log(LOG_ERROR, "There are no local system nameservers configured, resorting to system resolution\n");
      ao2_ref(discovered_nameservers, -1);
      return -1;
   }

   if (!(resolver = pjsip_endpt_get_resolver(ast_sip_get_pjsip_endpoint()))) {
      status = pjsip_endpt_create_resolver(ast_sip_get_pjsip_endpoint(), &resolver);
      if (status != PJ_SUCCESS) {
         ast_log(LOG_ERROR, "Could not create DNS resolver(%d), resorting to system resolution\n", status);
         ao2_ref(discovered_nameservers, -1);
         return 0;
      }
   }

   it_nameservers = ao2_iterator_init(discovered_nameservers, 0);
   while ((nameserver = ao2_iterator_next(&it_nameservers))) {
      pj_strset2(&nameservers[count++], nameserver);
      ao2_ref(nameserver, -1);

      if (count == (PJ_DNS_RESOLVER_MAX_NS - 1)) {
         break;
      }
   }
   ao2_iterator_destroy(&it_nameservers);

   status = pj_dns_resolver_set_ns(resolver, count, nameservers, NULL);

   /* Since we no longer need the nameservers we can drop the list of them */
   ao2_ref(discovered_nameservers, -1);

   if (status != PJ_SUCCESS) {
      ast_log(LOG_ERROR, "Could not set nameservers on DNS resolver in PJSIP(%d), resorting to system resolution\n",
         status);
      return 0;
   }

   if (!pjsip_endpt_get_resolver(ast_sip_get_pjsip_endpoint())) {
      status = pjsip_endpt_set_resolver(ast_sip_get_pjsip_endpoint(), resolver);
      if (status != PJ_SUCCESS) {
         ast_log(LOG_ERROR, "Could not set DNS resolver in PJSIP(%d), resorting to system resolution\n", status);
         return 0;
      }
   }

   return 0;
}

Variable Documentation

sip_threadpool_options

struct ast_threadpool_options sip_threadpool_options

static

Initial value:

= {
   .version = AST_THREADPOOL_OPTIONS_VERSION,
}

Definition at line 66 of file config_system.c.

Referenced by sip_get_threadpool_options().

system_sorcery

struct ast_sorcery* system_sorcery

static

Definition at line 75 of file config_system.c.