pjsip_distributor.c File Reference

#include "asterisk.h"
#include <pjsip.h>
#include "asterisk/res_pjsip.h"
#include "asterisk/acl.h"
#include "include/res_pjsip_private.h"
#include "asterisk/taskprocessor.h"
#include "asterisk/threadpool.h"
#include "asterisk/res_pjsip_cli.h"

Include dependency graph for pjsip_distributor.c:

Go to the source code of this file.

Data Structures
struct	distributor_dialog_data
struct	unidentified_request

Macros
#define	DEFAULT_SUSPECTS_BUCKETS   53
#define	DIALOG_ASSOCIATIONS_BUCKETS   251
#define	DISTRIBUTOR_POOL_SIZE   31
#define	MAX_REALM_LENGTH   40

Functions
static struct ast_sip_auth *	alloc_artificial_auth (char *default_realm)
static	AO2_GLOBAL_OBJ_STATIC (artificial_auth)
static void	apply_acls (pjsip_rx_data *rdata)
static int	apply_endpoint_acl (pjsip_rx_data *rdata, struct ast_sip_endpoint *endpoint)
static int	apply_endpoint_contact_acl (pjsip_rx_data *rdata, struct ast_sip_endpoint *endpoint)
struct ast_sip_endpoint *	ast_pjsip_rdata_get_endpoint (pjsip_rx_data *rdata)
	Get the looked-up endpoint on an out-of dialog request or response. More...
void	ast_sip_destroy_distributor (void)
struct ast_sip_endpoint *	ast_sip_dialog_get_endpoint (pjsip_dialog *dlg)
	Get the endpoint associated with this dialog. More...
void	ast_sip_dialog_set_endpoint (pjsip_dialog *dlg, struct ast_sip_endpoint *endpoint)
	Set an endpoint on a SIP dialog so in-dialog requests do not undergo endpoint lookup. More...
void	ast_sip_dialog_set_serializer (pjsip_dialog *dlg, struct ast_taskprocessor *serializer)
	Set a serializer on a SIP dialog so requests and responses are automatically serialized. More...
struct ast_sip_auth *	ast_sip_get_artificial_auth (void)
	Retrieves a reference to the artificial auth. More...
struct ast_sip_endpoint *	ast_sip_get_artificial_endpoint (void)
	Retrieves a reference to the artificial endpoint. More...
struct ast_taskprocessor *	ast_sip_get_distributor_serializer (pjsip_rx_data *rdata)
	Determine the distributor serializer for the SIP message. More...
int	ast_sip_initialize_distributor (void)
static pj_bool_t	authenticate (pjsip_rx_data *rdata)
static int	buf_hash (const char *pos, size_t len)
static int	buf_hash_add (const char *pos, size_t len, int hash)
static void	check_endpoint (pjsip_rx_data *rdata, struct unidentified_request *unid, const char *name)
static int	clean_task (const void *data)
static struct ao2_container *	cli_unid_get_container (const char *regex)
static const char *	cli_unid_get_id (const void *obj)
static int	cli_unid_iterate (void *container, ao2_callback_fn callback, void *args)
static int	cli_unid_print_body (void *obj, void *arg, int flags)
static int	cli_unid_print_header (void *obj, void *arg, int flags)
static void *	cli_unid_retrieve_by_id (const char *id)
static int	create_artificial_auth (void)
static int	create_artificial_endpoint (void)
static int	dialog_associations_cmp (void *obj, void *arg, int flags)
static int	dialog_associations_hash (const void *obj, int flags)
static int	distribute (void *data)
static pj_bool_t	distributor (pjsip_rx_data *rdata)
static int	distributor_pool_setup (void)
static void	distributor_pool_shutdown (void)
static pj_bool_t	endpoint_lookup (pjsip_rx_data *rdata)
static int	expire_requests (void *object, void *arg, int flags)
static int	extract_contact_addr (pjsip_contact_hdr *contact, struct ast_sockaddr **addrs)
static pjsip_dialog *	find_dialog (pjsip_rx_data *rdata)
static struct ast_taskprocessor *	find_request_serializer (pjsip_rx_data *rdata)
static void	global_loaded (const char *object_type)
static void	log_failed_request (pjsip_rx_data *rdata, char *msg, unsigned int count, unsigned int period)
static int	pjstr_hash (pj_str_t *str)
static int	pjstr_hash_add (pj_str_t *str, int hash)
static int	prune_task (const void *data)
static pj_status_t	record_serializer (pjsip_tx_data *tdata)
static int	suspects_compare (void *obj, void *arg, int flags)
static int	suspects_hash (const void *obj, int flags)
static int	suspects_sort (const void *obj, const void *arg, int flags)

Variables
static struct ast_sip_endpoint *	artificial_endpoint = NULL
static pjsip_module	auth_mod
static struct ast_cli_entry	cli_commands []
static struct ao2_container *	dialog_associations
static pjsip_module	distributor_mod
static struct ast_taskprocessor *	distributor_pool [DISTRIBUTOR_POOL_SIZE]
static pjsip_module	endpoint_mod
static struct ast_sorcery_observer	global_observer
	Observer which is used to update our interval and default_realm when the global setting changes. More...
static enum ast_sip_taskprocessor_overload_trigger	overload_trigger
struct ast_sched_context *	prune_context
struct ast_sip_cli_formatter_entry *	unid_formatter
static unsigned int	unidentified_count
static unsigned int	unidentified_period
static unsigned int	unidentified_prune_interval
static struct ao2_container *	unidentified_requests
static int	using_auth_username

Macro Definition Documentation

DEFAULT_SUSPECTS_BUCKETS

#define DEFAULT_SUSPECTS_BUCKETS   53

Definition at line 47 of file pjsip_distributor.c.

Referenced by ast_sip_initialize_distributor().

DIALOG_ASSOCIATIONS_BUCKETS

#define DIALOG_ASSOCIATIONS_BUCKETS   251

Definition at line 162 of file pjsip_distributor.c.

Referenced by ast_sip_initialize_distributor().

DISTRIBUTOR_POOL_SIZE

#define DISTRIBUTOR_POOL_SIZE   31

Number of serializers in pool if one not otherwise known. (Best if prime number)

Definition at line 63 of file pjsip_distributor.c.

MAX_REALM_LENGTH

#define MAX_REALM_LENGTH   40

Definition at line 45 of file pjsip_distributor.c.

Referenced by create_artificial_auth(), and global_loaded().

Function Documentation

alloc_artificial_auth()

static struct ast_sip_auth* alloc_artificial_auth ( char *  default_realm )

static

Definition at line 594 of file pjsip_distributor.c.

References AO2_GLOBAL_OBJ_STATIC(), AST_SIP_AUTH_TYPE_ARTIFICIAL, ast_sip_get_sorcery(), ast_sorcery_alloc(), ast_string_field_set, ast_sip_auth::auth_pass, ast_sip_auth::auth_user, NULL, ast_sip_auth::realm, and ast_sip_auth::type.

Referenced by create_artificial_auth(), and global_loaded().

{
   struct ast_sip_auth *fake_auth;

   fake_auth = ast_sorcery_alloc(ast_sip_get_sorcery(), SIP_SORCERY_AUTH_TYPE,
      "artificial");
   if (!fake_auth) {
      return NULL;
   }

   ast_string_field_set(fake_auth, realm, default_realm);
   ast_string_field_set(fake_auth, auth_user, "");
   ast_string_field_set(fake_auth, auth_pass, "");
   fake_auth->type = AST_SIP_AUTH_TYPE_ARTIFICIAL;

   return fake_auth;
}

AO2_GLOBAL_OBJ_STATIC()

static AO2_GLOBAL_OBJ_STATIC ( artificial_auth  )

static

Referenced by alloc_artificial_auth().

apply_acls()

static void apply_acls ( pjsip_rx_data *  rdata )

static

Definition at line 701 of file pjsip_distributor.c.

References ao2_replace, apply_endpoint_acl(), apply_endpoint_contact_acl(), ast_debug, ast_sorcery_object_get_id(), and endpoint_mod.

Referenced by endpoint_lookup().

{
   struct ast_sip_endpoint *endpoint;

   /* Is the endpoint allowed with the source or contact address? */
   endpoint = rdata->endpt_info.mod_data[endpoint_mod.id];
   if (endpoint != artificial_endpoint
      && (apply_endpoint_acl(rdata, endpoint)
         || apply_endpoint_contact_acl(rdata, endpoint))) {
      ast_debug(1, "Endpoint '%s' not allowed by ACL\n",
         ast_sorcery_object_get_id(endpoint));

      /* Replace the rdata endpoint with the artificial endpoint. */
      ao2_replace(rdata->endpt_info.mod_data[endpoint_mod.id], artificial_endpoint);
   }
}

apply_endpoint_acl()

static int apply_endpoint_acl ( pjsip_rx_data *  rdata, struct ast_sip_endpoint *  endpoint  )

static

Definition at line 807 of file pjsip_distributor.c.

References ast_sip_endpoint::acl, ast_acl_list_is_empty(), ast_apply_acl(), AST_SENSE_ALLOW, ast_sip_report_failed_acl(), ast_sockaddr_parse(), ast_sockaddr_set_port, log_failed_request(), and PARSE_PORT_FORBID.

Referenced by apply_acls(), and check_endpoint().

{
   struct ast_sockaddr addr;

   if (ast_acl_list_is_empty(endpoint->acl)) {
      return 0;
   }

   memset(&addr, 0, sizeof(addr));
   ast_sockaddr_parse(&addr, rdata->pkt_info.src_name, PARSE_PORT_FORBID);
   ast_sockaddr_set_port(&addr, rdata->pkt_info.src_port);

   if (ast_apply_acl(endpoint->acl, &addr, "SIP ACL: ") != AST_SENSE_ALLOW) {
      log_failed_request(rdata, "Not match Endpoint ACL", 0, 0);
      ast_sip_report_failed_acl(endpoint, rdata, "not_match_endpoint_acl");
      return 1;
   }
   return 0;
}

apply_endpoint_contact_acl()

static int apply_endpoint_contact_acl ( pjsip_rx_data *  rdata, struct ast_sip_endpoint *  endpoint  )

static

Definition at line 845 of file pjsip_distributor.c.

References ast_acl_list_is_empty(), ast_apply_acl(), ast_free, AST_SENSE_ALLOW, ast_sip_report_failed_acl(), ast_sip_endpoint::contact_acl, extract_contact_addr(), if(), and log_failed_request().

Referenced by apply_acls(), and check_endpoint().

{
   int num_contact_addrs;
   int forbidden = 0;
   struct ast_sockaddr *contact_addrs;
   int i;
   pjsip_contact_hdr *contact = (pjsip_contact_hdr *)&rdata->msg_info.msg->hdr;

   if (ast_acl_list_is_empty(endpoint->contact_acl)) {
      return 0;
   }

   while ((contact = pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_CONTACT, contact->next))) {
      num_contact_addrs = extract_contact_addr(contact, &contact_addrs);
      if (num_contact_addrs <= 0) {
         continue;
      }
      for (i = 0; i < num_contact_addrs; ++i) {
         if (ast_apply_acl(endpoint->contact_acl, &contact_addrs[i], "SIP Contact ACL: ") != AST_SENSE_ALLOW) {
            log_failed_request(rdata, "Not match Endpoint Contact ACL", 0, 0);
            ast_sip_report_failed_acl(endpoint, rdata, "not_match_endpoint_contact_acl");
            forbidden = 1;
            break;
         }
      }
      ast_free(contact_addrs);
      if (forbidden) {
         /* No use checking other contacts if we already have failed ACL check */
         break;
      }
   }

   return forbidden;
}

ast_pjsip_rdata_get_endpoint()

struct ast_sip_endpoint* ast_pjsip_rdata_get_endpoint

(

pjsip_rx_data *

rdata

)

Get the looked-up endpoint on an out-of dialog request or response.

The function may ONLY be called on out-of-dialog requests or responses. For in-dialog requests and responses, it is required that the user of the dialog has the looked-up endpoint stored locally.

This function should never return NULL if the message is out-of-dialog. It will always return NULL if the message is in-dialog.

This function will increase the reference count of the returned endpoint by one. Release your reference using the ao2_ref function when finished.

Parameters

rdata

Out-of-dialog request or response

Returns

The looked up endpoint

Definition at line 969 of file pjsip_distributor.c.

References ao2_ref, and endpoint_mod.

Referenced by authenticate(), handle_new_invite_request(), nat_on_rx_message(), options_on_rx_request(), pubsub_on_rx_mwi_notify_request(), pubsub_on_rx_publish_request(), pubsub_on_rx_subscribe_request(), registrar_on_rx_request(), rx_data_to_ast_msg(), send_options_response(), send_response(), and supplement_on_rx_request().

{
   struct ast_sip_endpoint *endpoint = rdata->endpt_info.mod_data[endpoint_mod.id];
   if (endpoint) {
      ao2_ref(endpoint, +1);
   }
   return endpoint;
}

ast_sip_destroy_distributor()

void ast_sip_destroy_distributor

(

void

)

Definition at line 1334 of file pjsip_distributor.c.

References ao2_cleanup, ao2_global_obj_release, ARRAY_LEN, ast_cli_unregister_multiple(), ast_sched_context_destroy(), ast_sip_get_sorcery(), ast_sip_unregister_cli_formatter(), ast_sip_unregister_service(), ast_sorcery_observer_remove(), auth_mod, distributor_mod, distributor_pool_shutdown(), and endpoint_mod.

Referenced by ast_sip_initialize_distributor(), and unload_pjsip().

{
   ast_cli_unregister_multiple(cli_commands, ARRAY_LEN(cli_commands));
   ast_sip_unregister_cli_formatter(unid_formatter);

   ast_sip_unregister_service(&auth_mod);
   ast_sip_unregister_service(&endpoint_mod);
   ast_sip_unregister_service(&distributor_mod);

   ao2_global_obj_release(artificial_auth);
   ao2_cleanup(artificial_endpoint);

   ast_sorcery_observer_remove(ast_sip_get_sorcery(), "global", &global_observer);

   if (prune_context) {
      ast_sched_context_destroy(prune_context);
   }

   distributor_pool_shutdown();

   ao2_cleanup(dialog_associations);
   ao2_cleanup(unidentified_requests);
}

ast_sip_get_artificial_auth()

struct ast_sip_auth* ast_sip_get_artificial_auth

(

void

)

Retrieves a reference to the artificial auth.

Return values

The	artificial auth

Definition at line 631 of file pjsip_distributor.c.

References ao2_global_obj_ref.

Referenced by digest_check_auth(), and global_loaded().

{
   return ao2_global_obj_ref(artificial_auth);
}

ast_sip_get_artificial_endpoint()

struct ast_sip_endpoint* ast_sip_get_artificial_endpoint

(

void

)

Retrieves a reference to the artificial endpoint.

Return values

The	artificial endpoint

Definition at line 654 of file pjsip_distributor.c.

References ao2_ref, and artificial_endpoint.

Referenced by digest_check_auth(), digest_requires_authentication(), endpoint_lookup(), and get_account_id().

{
   ao2_ref(artificial_endpoint, +1);
   return artificial_endpoint;
}

ast_sip_initialize_distributor()

int ast_sip_initialize_distributor

(

void

)

Definition at line 1260 of file pjsip_distributor.c.

References AO2_ALLOC_OPT_LOCK_NOLOCK, AO2_ALLOC_OPT_LOCK_RWLOCK, ao2_alloc_options, ao2_container_alloc_hash, ARRAY_LEN, ast_cli_register_multiple, ast_log, ast_sched_context_create(), ast_sched_start_thread(), ast_sip_destroy_distributor(), ast_sip_get_sorcery(), ast_sip_register_cli_formatter(), ast_sip_register_service(), ast_sorcery_observer_add(), ast_sorcery_reload_object(), auth_mod, cli_unid_get_container(), cli_unid_get_id(), cli_unid_iterate(), cli_unid_print_body(), cli_unid_print_header(), cli_unid_retrieve_by_id(), create_artificial_auth(), create_artificial_endpoint(), DEFAULT_SUSPECTS_BUCKETS, DIALOG_ASSOCIATIONS_BUCKETS, dialog_associations_cmp(), dialog_associations_hash(), distributor_mod, distributor_pool_setup(), endpoint_mod, ast_sip_cli_formatter_entry::get_container, ast_sip_cli_formatter_entry::get_id, ast_sip_cli_formatter_entry::iterate, LOG_ERROR, ast_sip_cli_formatter_entry::name, NULL, ast_sip_cli_formatter_entry::print_body, ast_sip_cli_formatter_entry::print_header, ast_sip_cli_formatter_entry::retrieve_by_id, suspects_compare(), and suspects_hash().

Referenced by load_module().

{
   unidentified_requests = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_RWLOCK, 0,
      DEFAULT_SUSPECTS_BUCKETS, suspects_hash, NULL, suspects_compare);
   if (!unidentified_requests) {
      return -1;
   }

   dialog_associations = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_RWLOCK, 0,
      DIALOG_ASSOCIATIONS_BUCKETS, dialog_associations_hash, NULL,
      dialog_associations_cmp);
   if (!dialog_associations) {
      ast_sip_destroy_distributor();
      return -1;
   }

   if (distributor_pool_setup()) {
      ast_sip_destroy_distributor();
      return -1;
   }

   prune_context = ast_sched_context_create();
   if (!prune_context) {
      ast_sip_destroy_distributor();
      return -1;
   }

   if (ast_sched_start_thread(prune_context)) {
      ast_sip_destroy_distributor();
      return -1;
   }

   ast_sorcery_observer_add(ast_sip_get_sorcery(), "global", &global_observer);
   ast_sorcery_reload_object(ast_sip_get_sorcery(), "global");

   if (create_artificial_endpoint() || create_artificial_auth()) {
      ast_sip_destroy_distributor();
      return -1;
   }

   if (ast_sip_register_service(&distributor_mod)) {
      ast_sip_destroy_distributor();
      return -1;
   }
   if (ast_sip_register_service(&endpoint_mod)) {
      ast_sip_destroy_distributor();
      return -1;
   }
   if (ast_sip_register_service(&auth_mod)) {
      ast_sip_destroy_distributor();
      return -1;
   }

   unid_formatter = ao2_alloc_options(sizeof(struct ast_sip_cli_formatter_entry), NULL,
      AO2_ALLOC_OPT_LOCK_NOLOCK);
   if (!unid_formatter) {
      ast_sip_destroy_distributor();
      ast_log(LOG_ERROR, "Unable to allocate memory for unid_formatter\n");
      return -1;
   }
   unid_formatter->name = "unidentified_request";
   unid_formatter->print_header = cli_unid_print_header;
   unid_formatter->print_body = cli_unid_print_body;
   unid_formatter->get_container = cli_unid_get_container;
   unid_formatter->iterate = cli_unid_iterate;
   unid_formatter->get_id = cli_unid_get_id;
   unid_formatter->retrieve_by_id = cli_unid_retrieve_by_id;
   ast_sip_register_cli_formatter(unid_formatter);

   ast_cli_register_multiple(cli_commands, ARRAY_LEN(cli_commands));

   return 0;
}

authenticate()

static pj_bool_t authenticate ( pjsip_rx_data *  rdata )

static

Definition at line 880 of file pjsip_distributor.c.

References ao2_cleanup, ao2_find, ao2_ref, ao2_unlink, ast_assert, ast_pjsip_rdata_get_endpoint(), AST_SIP_AUTHENTICATION_CHALLENGE, AST_SIP_AUTHENTICATION_ERROR, AST_SIP_AUTHENTICATION_FAILED, AST_SIP_AUTHENTICATION_SUCCESS, ast_sip_check_authentication(), ast_sip_get_pjsip_endpoint(), ast_sip_report_auth_challenge_sent(), ast_sip_report_auth_failed_challenge_response(), ast_sip_report_auth_success(), ast_sip_requires_authentication(), log_failed_request(), NULL, OBJ_SEARCH_KEY, and RAII_VAR.

{
   RAII_VAR(struct ast_sip_endpoint *, endpoint, ast_pjsip_rdata_get_endpoint(rdata), ao2_cleanup);
   int is_ack = rdata->msg_info.msg->line.req.method.id == PJSIP_ACK_METHOD;

   ast_assert(endpoint != NULL);

   if (is_ack) {
      return PJ_FALSE;
   }

   if (ast_sip_requires_authentication(endpoint, rdata)) {
      pjsip_tx_data *tdata;
      struct unidentified_request *unid;

      pjsip_endpt_create_response(ast_sip_get_pjsip_endpoint(), rdata, 401, NULL, &tdata);
      switch (ast_sip_check_authentication(endpoint, rdata, tdata)) {
      case AST_SIP_AUTHENTICATION_CHALLENGE:
         /* Send the 401 we created for them */
         ast_sip_report_auth_challenge_sent(endpoint, rdata, tdata);
         if (pjsip_endpt_send_response2(ast_sip_get_pjsip_endpoint(), rdata, tdata, NULL, NULL) != PJ_SUCCESS) {
            pjsip_tx_data_dec_ref(tdata);
         }
         return PJ_TRUE;
      case AST_SIP_AUTHENTICATION_SUCCESS:
         /* See note in endpoint_lookup about not holding an unnecessary write lock */
         unid = ao2_find(unidentified_requests, rdata->pkt_info.src_name, OBJ_SEARCH_KEY);
         if (unid) {
            ao2_unlink(unidentified_requests, unid);
            ao2_ref(unid, -1);
         }
         ast_sip_report_auth_success(endpoint, rdata);
         break;
      case AST_SIP_AUTHENTICATION_FAILED:
         log_failed_request(rdata, "Failed to authenticate", 0, 0);
         ast_sip_report_auth_failed_challenge_response(endpoint, rdata);
         if (pjsip_endpt_send_response2(ast_sip_get_pjsip_endpoint(), rdata, tdata, NULL, NULL) != PJ_SUCCESS) {
            pjsip_tx_data_dec_ref(tdata);
         }
         return PJ_TRUE;
      case AST_SIP_AUTHENTICATION_ERROR:
         log_failed_request(rdata, "Error to authenticate", 0, 0);
         ast_sip_report_auth_failed_challenge_response(endpoint, rdata);
         pjsip_tx_data_dec_ref(tdata);
         pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 500, NULL, NULL, NULL);
         return PJ_TRUE;
      }
      pjsip_tx_data_dec_ref(tdata);
   } else if (endpoint == artificial_endpoint) {
      /* Uh. Oh.  The artificial endpoint couldn't challenge so block the request. */
      pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 500, NULL, NULL, NULL);
      return PJ_TRUE;
   }

   return PJ_FALSE;
}

buf_hash()

static int buf_hash ( const char *  pos, size_t  len  )

static

Definition at line 210 of file pjsip_distributor.c.

References buf_hash_add().

Referenced by dialog_associations_hash().

{
   return buf_hash_add(pos, len, 5381);
}

buf_hash_add()

static int buf_hash_add ( const char *  pos, size_t  len, int  hash  )

static

Definition at line 184 of file pjsip_distributor.c.

Referenced by buf_hash(), and pjstr_hash_add().

{
   while (len--) {
      hash = hash * 33 ^ *pos++;
   }

   return hash;
}

check_endpoint()

static void check_endpoint ( pjsip_rx_data *  rdata, struct unidentified_request *  unid, const char *  name  )

static

Definition at line 683 of file pjsip_distributor.c.

References ao2_unlock, ao2_wrlock, apply_endpoint_acl(), apply_endpoint_contact_acl(), ast_sip_report_invalid_endpoint(), ast_tvdiff_ms(), ast_tvnow(), unidentified_request::count, unidentified_request::first_seen, log_failed_request(), unidentified_count, and unidentified_period.

Referenced by endpoint_lookup().

{
   int64_t ms = ast_tvdiff_ms(ast_tvnow(), unid->first_seen);

   ao2_wrlock(unid);
   unid->count++;

   if (ms < (unidentified_period * 1000) && unid->count >= unidentified_count) {
      log_failed_request(rdata, "No matching endpoint found", unid->count, ms);
      ast_sip_report_invalid_endpoint(name, rdata);
   }
   ao2_unlock(unid);
}

clean_task()

static int clean_task ( const void *  data )

static

Definition at line 1160 of file pjsip_distributor.c.

Referenced by global_loaded().

{
   return 0;
}

cli_unid_get_container()

static struct ao2_container* cli_unid_get_container ( const char *  regex )

static

Definition at line 1051 of file pjsip_distributor.c.

References AO2_ALLOC_OPT_LOCK_NOLOCK, ao2_container_alloc_list, ao2_container_dup(), ao2_ref, NULL, suspects_compare(), and suspects_sort().

Referenced by ast_sip_initialize_distributor().

{
   struct ao2_container *s_container;

   s_container = ao2_container_alloc_list(AO2_ALLOC_OPT_LOCK_NOLOCK, 0,
      suspects_sort, suspects_compare);
   if (!s_container) {
      return NULL;
   }

   if (ao2_container_dup(s_container, unidentified_requests, 0)) {
      ao2_ref(s_container, -1);
      return NULL;
   }

   return s_container;
}

cli_unid_get_id()

static const char* cli_unid_get_id ( const void *  obj )

static

Definition at line 1081 of file pjsip_distributor.c.

References unidentified_request::src_name.

Referenced by ast_sip_initialize_distributor().

{
   const struct unidentified_request *unid = obj;

   return unid->src_name;
}

cli_unid_iterate()

static int cli_unid_iterate ( void *  container, ao2_callback_fn  callback, void *  args  )

static

Definition at line 1069 of file pjsip_distributor.c.

References ao2_callback.

Referenced by ast_sip_initialize_distributor().

{
   ao2_callback(container, 0, callback, args);

   return 0;
}

cli_unid_print_body()

static int cli_unid_print_body ( void *  obj, void *  arg, int  flags  )

static

Definition at line 1105 of file pjsip_distributor.c.

References ast_assert, ast_str_append(), ast_tvdiff_ms(), ast_tvnow(), CLI_INDENT_TO_SPACES, CLI_LAST_TABSTOP, context, unidentified_request::count, unidentified_request::first_seen, ast_sip_cli_context::indent_level, NULL, ast_sip_cli_context::output_buffer, and unidentified_request::src_name.

Referenced by ast_sip_initialize_distributor().

{
   struct unidentified_request *unid = obj;
   struct ast_sip_cli_context *context = arg;
   int indent;
   int flexwidth;
   int64_t ms = ast_tvdiff_ms(ast_tvnow(), unid->first_seen);

   ast_assert(context->output_buffer != NULL);

   indent = CLI_INDENT_TO_SPACES(context->indent_level);
   flexwidth = CLI_LAST_TABSTOP - 4;

   ast_str_append(&context->output_buffer, 0, "%*s:  %-*.*s  %7d %10.3f\n",
      indent,
      "Request",
      flexwidth, flexwidth,
      unid->src_name, unid->count,  ms / 1000.0);

   return 0;
}

cli_unid_print_header()

static int cli_unid_print_header ( void *  obj, void *  arg, int  flags  )

static

Definition at line 1088 of file pjsip_distributor.c.

References ao2_cleanup, ast_assert, ast_str_append(), CLI_HEADER_FILLER, CLI_INDENT_TO_SPACES, CLI_LAST_TABSTOP, context, ast_sip_cli_context::indent_level, NULL, ast_sip_cli_context::output_buffer, and RAII_VAR.

Referenced by ast_sip_initialize_distributor().

{
   struct ast_sip_cli_context *context = arg;
   RAII_VAR(struct ast_sip_cli_formatter_entry *, formatter_entry, NULL, ao2_cleanup);

   int indent = CLI_INDENT_TO_SPACES(context->indent_level);
   int filler = CLI_LAST_TABSTOP - indent - 7;

   ast_assert(context->output_buffer != NULL);

   ast_str_append(&context->output_buffer, 0,
      "%*s:  <IP Address%*.*s>  <Count> <Age(sec)>\n",
      indent, "Request", filler, filler, CLI_HEADER_FILLER);

   return 0;
}

cli_unid_retrieve_by_id()

static void* cli_unid_retrieve_by_id ( const char *  id )

static

Definition at line 1076 of file pjsip_distributor.c.

References ao2_find, and OBJ_SEARCH_KEY.

Referenced by ast_sip_initialize_distributor().

{
   return ao2_find(unidentified_requests, id, OBJ_SEARCH_KEY);
}

create_artificial_auth()

static int create_artificial_auth ( void  )

static

Definition at line 614 of file pjsip_distributor.c.

References alloc_artificial_auth(), ao2_global_obj_replace_unref, ao2_ref, ast_log, ast_sip_get_default_realm(), default_realm, LOG_ERROR, and MAX_REALM_LENGTH.

Referenced by ast_sip_initialize_distributor().

{
   char default_realm[MAX_REALM_LENGTH + 1];
   struct ast_sip_auth *fake_auth;

   ast_sip_get_default_realm(default_realm, sizeof(default_realm));
   fake_auth = alloc_artificial_auth(default_realm);
   if (!fake_auth) {
      ast_log(LOG_ERROR, "Unable to create artificial auth\n");
      return -1;
   }

   ao2_global_obj_replace_unref(artificial_auth, fake_auth);
   ao2_ref(fake_auth, -1);
   return 0;
}

create_artificial_endpoint()

static int create_artificial_endpoint ( void  )

static

Definition at line 638 of file pjsip_distributor.c.

References ast_sip_get_sorcery(), ast_sorcery_alloc(), ast_strdup, AST_VECTOR_APPEND, AST_VECTOR_INIT, ast_sip_endpoint::inbound_auths, and NULL.

Referenced by ast_sip_initialize_distributor().

{
   artificial_endpoint = ast_sorcery_alloc(ast_sip_get_sorcery(), "endpoint", NULL);
   if (!artificial_endpoint) {
      return -1;
   }

   AST_VECTOR_INIT(&artificial_endpoint->inbound_auths, 1);
   /* Pushing a bogus value into the vector will ensure that
    * the proper size of the vector is returned. This value is
    * not actually used anywhere
    */
   AST_VECTOR_APPEND(&artificial_endpoint->inbound_auths, ast_strdup("artificial-auth"));
   return 0;
}

dialog_associations_cmp()

static int dialog_associations_cmp ( void *  obj, void *  arg, int  flags  )

static

Definition at line 239 of file pjsip_distributor.c.

References ast_assert, CMP_MATCH, distributor_dialog_data::dlg, OBJ_SEARCH_KEY, OBJ_SEARCH_MASK, OBJ_SEARCH_OBJECT, and OBJ_SEARCH_PARTIAL_KEY.

Referenced by ast_sip_initialize_distributor().

{
   const struct distributor_dialog_data *object_left = obj;
   const struct distributor_dialog_data *object_right = arg;
   const pjsip_dialog *right_key = arg;
   int cmp = 0;

   switch (flags & OBJ_SEARCH_MASK) {
   case OBJ_SEARCH_OBJECT:
      right_key = object_right->dlg;
      /* Fall through */
   case OBJ_SEARCH_KEY:
      if (object_left->dlg == right_key) {
         cmp = CMP_MATCH;
      }
      break;
   case OBJ_SEARCH_PARTIAL_KEY:
      /* There is no such thing for this container. */
      ast_assert(0);
      break;
   default:
      cmp = 0;
      break;
   }
   return cmp;
}

dialog_associations_hash()

static int dialog_associations_hash ( const void *  obj, int  flags  )

static

Definition at line 215 of file pjsip_distributor.c.

References ast_assert, ast_str_hash_restrict(), buf, buf_hash(), OBJ_SEARCH_KEY, OBJ_SEARCH_MASK, and OBJ_SEARCH_OBJECT.

Referenced by ast_sip_initialize_distributor().

{
   const struct distributor_dialog_data *object;
   union {
      const pjsip_dialog *dlg;
      const char buf[sizeof(pjsip_dialog *)];
   } key;

   switch (flags & OBJ_SEARCH_MASK) {
   case OBJ_SEARCH_KEY:
      key.dlg = obj;
      break;
   case OBJ_SEARCH_OBJECT:
      object = obj;
      key.dlg = object->dlg;
      break;
   default:
      /* Hash can only work on something with a full key. */
      ast_assert(0);
      return 0;
   }
   return ast_str_hash_restrict(buf_hash(key.buf, sizeof(key.buf)));
}

distribute()

static int distribute ( void *  data )

static

Definition at line 943 of file pjsip_distributor.c.

References ao2_cleanup, ast_sip_get_pjsip_endpoint(), distributor_mod, endpoint_mod, and NULL.

Referenced by distributor().

{
   static pjsip_process_rdata_param param = {
      .start_mod = &distributor_mod,
      .idx_after_start = 1,
   };
   pj_bool_t handled = PJ_FALSE;
   pjsip_rx_data *rdata = data;
   int is_request = rdata->msg_info.msg->type == PJSIP_REQUEST_MSG;
   int is_ack = is_request ? rdata->msg_info.msg->line.req.method.id == PJSIP_ACK_METHOD : 0;
   struct ast_sip_endpoint *endpoint;

   pjsip_endpt_process_rx_data(ast_sip_get_pjsip_endpoint(), rdata, &param, &handled);
   if (!handled && is_request && !is_ack) {
      pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 501, NULL, NULL, NULL);
   }

   /* The endpoint_mod stores an endpoint reference in the mod_data of rdata. This
    * is the only appropriate spot to actually decrement the reference.
    */
   endpoint = rdata->endpt_info.mod_data[endpoint_mod.id];
   ao2_cleanup(endpoint);
   pjsip_rx_data_free_cloned(rdata);
   return 0;
}

distributor()

static pj_bool_t distributor ( pjsip_rx_data *  rdata )

static

Definition at line 485 of file pjsip_distributor.c.

References ao2_bump, ao2_cleanup, ao2_find, ao2_lock, ao2_unlock, ast_debug, AST_OPT_FLAG_FULLY_BOOTED, ast_options, ast_sip_get_distributor_serializer(), ast_sip_get_pjsip_endpoint(), ast_sip_push_task(), ast_taskprocessor_alert_get(), ast_taskprocessor_get_subsystem_alert(), ast_taskprocessor_name(), ast_taskprocessor_unreference(), ast_test_flag, distribute(), distributor_dialog_data::endpoint, endpoint_mod, find_dialog(), find_request_serializer(), NULL, OBJ_SEARCH_KEY, overload_trigger, distributor_dialog_data::serializer, TASKPROCESSOR_OVERLOAD_TRIGGER_GLOBAL, and TASKPROCESSOR_OVERLOAD_TRIGGER_PJSIP_ONLY.

{
   pjsip_dialog *dlg;
   struct distributor_dialog_data *dist = NULL;
   struct ast_taskprocessor *serializer = NULL;
   pjsip_rx_data *clone;

   if (!ast_test_flag(&ast_options, AST_OPT_FLAG_FULLY_BOOTED)) {
      /*
       * Ignore everything until we are fully booted.  Let the
       * peer retransmit messages until we are ready.
       */
      return PJ_TRUE;
   }

   dlg = find_dialog(rdata);
   if (dlg) {
      ast_debug(3, "Searching for serializer associated with dialog %s for %s\n",
         dlg->obj_name, pjsip_rx_data_get_info(rdata));
      dist = ao2_find(dialog_associations, dlg, OBJ_SEARCH_KEY);
      if (dist) {
         ao2_lock(dist);
         serializer = ao2_bump(dist->serializer);
         ao2_unlock(dist);
         if (serializer) {
            ast_debug(3, "Found serializer %s associated with dialog %s\n",
               ast_taskprocessor_name(serializer), dlg->obj_name);
         }
      }
   }

   if (serializer) {
      /* We have a serializer so we know where to send the message. */
   } else if (rdata->msg_info.msg->type == PJSIP_RESPONSE_MSG) {
      ast_debug(3, "No dialog serializer for %s.  Using request transaction as basis.\n",
         pjsip_rx_data_get_info(rdata));
      serializer = find_request_serializer(rdata);
      if (!serializer) {
         /*
          * Pick a serializer for the unmatched response.
          * We couldn't determine what serializer originally
          * sent the request or the serializer is gone.
          */
         serializer = ast_sip_get_distributor_serializer(rdata);
      }
   } else if (!pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, &pjsip_cancel_method)
      || !pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, &pjsip_bye_method)) {
      /* We have a BYE or CANCEL request without a serializer. */
      pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata,
         PJSIP_SC_CALL_TSX_DOES_NOT_EXIST, NULL, NULL, NULL);
      ao2_cleanup(dist);
      return PJ_TRUE;
   } else {
      if ((overload_trigger == TASKPROCESSOR_OVERLOAD_TRIGGER_GLOBAL &&
         ast_taskprocessor_alert_get())
         || (overload_trigger == TASKPROCESSOR_OVERLOAD_TRIGGER_PJSIP_ONLY &&
         ast_taskprocessor_get_subsystem_alert("pjsip"))) {
         /*
          * When taskprocessors get backed up, there is a good chance that
          * we are being overloaded and need to defer adding new work to
          * the system.  To defer the work we will ignore the request and
          * rely on the peer's transport layer to retransmit the message.
          * We usually work off the overload within a few seconds.
          * If transport is non-UDP we send a 503 response instead.
          */
         switch (rdata->tp_info.transport->key.type) {
         case PJSIP_TRANSPORT_UDP6:
         case PJSIP_TRANSPORT_UDP:
            ast_debug(3, "Taskprocessor overload alert: Ignoring '%s'.\n",
               pjsip_rx_data_get_info(rdata));
            break;
         default:
            ast_debug(3, "Taskprocessor overload on non-udp transport. Received:'%s'. "
               "Responding with a 503.\n", pjsip_rx_data_get_info(rdata));
            pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata,
               PJSIP_SC_SERVICE_UNAVAILABLE, NULL, NULL, NULL);
            break;
         }
         ao2_cleanup(dist);
         return PJ_TRUE;
      }

      /* Pick a serializer for the out-of-dialog request. */
      serializer = ast_sip_get_distributor_serializer(rdata);
   }

   if (pjsip_rx_data_clone(rdata, 0, &clone) != PJ_SUCCESS) {
      ast_taskprocessor_unreference(serializer);
      ao2_cleanup(dist);
      return PJ_TRUE;
   }

   if (dist) {
      ao2_lock(dist);
      clone->endpt_info.mod_data[endpoint_mod.id] = ao2_bump(dist->endpoint);
      ao2_unlock(dist);
      ao2_cleanup(dist);
   }

   if (ast_sip_push_task(serializer, distribute, clone)) {
      ao2_cleanup(clone->endpt_info.mod_data[endpoint_mod.id]);
      pjsip_rx_data_free_cloned(clone);
   }

   ast_taskprocessor_unreference(serializer);

   return PJ_TRUE;
}

distributor_pool_setup()

static int distributor_pool_setup ( void  )

static

Definition at line 1243 of file pjsip_distributor.c.

References ARRAY_LEN, ast_sip_create_serializer(), ast_taskprocessor_build_name(), and AST_TASKPROCESSOR_MAX_NAME.

Referenced by ast_sip_initialize_distributor().

{
   char tps_name[AST_TASKPROCESSOR_MAX_NAME + 1];
   int idx;

   for (idx = 0; idx < ARRAY_LEN(distributor_pool); ++idx) {
      /* Create name with seq number appended. */
      ast_taskprocessor_build_name(tps_name, sizeof(tps_name), "pjsip/distributor");

      distributor_pool[idx] = ast_sip_create_serializer(tps_name);
      if (!distributor_pool[idx]) {
         return -1;
      }
   }
   return 0;
}

distributor_pool_shutdown()

static void distributor_pool_shutdown ( void  )

static

Definition at line 1225 of file pjsip_distributor.c.

References ARRAY_LEN, ast_taskprocessor_unreference(), and NULL.

Referenced by ast_sip_destroy_distributor().

{
   int idx;

   for (idx = 0; idx < ARRAY_LEN(distributor_pool); ++idx) {
      ast_taskprocessor_unreference(distributor_pool[idx]);
      distributor_pool[idx] = NULL;
   }
}

endpoint_lookup()

static pj_bool_t endpoint_lookup ( pjsip_rx_data *  rdata )

static

Definition at line 718 of file pjsip_distributor.c.

References AO2_ALLOC_OPT_LOCK_RWLOCK, ao2_alloc_options, ao2_find, ao2_link_flags, ao2_ref, ao2_unlink, ao2_unlock, ao2_wrlock, apply_acls(), ast_copy_pj_str(), ast_sip_get_artificial_endpoint(), ast_sip_get_pjsip_endpoint(), ast_sip_identify_endpoint(), ast_sip_report_invalid_endpoint(), ast_tvnow(), AST_UUID_STR_LEN, check_endpoint(), unidentified_request::count, endpoint_mod, unidentified_request::first_seen, log_failed_request(), name, NULL, OBJ_NOLOCK, OBJ_SEARCH_KEY, unidentified_request::src_name, and using_auth_username.

Referenced by ast_sip_get_distributor_serializer().

{
   struct ast_sip_endpoint *endpoint;
   struct unidentified_request *unid;
   int is_ack = rdata->msg_info.msg->line.req.method.id == PJSIP_ACK_METHOD;

   endpoint = rdata->endpt_info.mod_data[endpoint_mod.id];
   if (endpoint) {
      /*
       * ao2_find with OBJ_UNLINK always write locks the container before even searching
       * for the object.  Since the majority case is that the object won't be found, do
       * the find without OBJ_UNLINK to prevent the unnecessary write lock, then unlink
       * if needed.
       */
      unid = ao2_find(unidentified_requests, rdata->pkt_info.src_name, OBJ_SEARCH_KEY);
      if (unid) {
         ao2_unlink(unidentified_requests, unid);
         ao2_ref(unid, -1);
      }
      apply_acls(rdata);
      return PJ_FALSE;
   }

   endpoint = ast_sip_identify_endpoint(rdata);
   if (endpoint) {
      unid = ao2_find(unidentified_requests, rdata->pkt_info.src_name, OBJ_SEARCH_KEY);
      if (unid) {
         ao2_unlink(unidentified_requests, unid);
         ao2_ref(unid, -1);
      }
   }

   if (!endpoint) {
      /* always use an artificial endpoint - per discussion no reason
         to have "alwaysauthreject" as an option.  It is felt using it
         was a bug fix and it is not needed since we are not worried about
         breaking old stuff and we really don't want to enable the discovery
         of SIP accounts */
      endpoint = ast_sip_get_artificial_endpoint();
   }

   /* endpoint ref held by mod_data[] */
   rdata->endpt_info.mod_data[endpoint_mod.id] = endpoint;

   if (endpoint == artificial_endpoint && !is_ack) {
      char name[AST_UUID_STR_LEN] = "";
      pjsip_uri *from = rdata->msg_info.from->uri;

      if (PJSIP_URI_SCHEME_IS_SIP(from) || PJSIP_URI_SCHEME_IS_SIPS(from)) {
         pjsip_sip_uri *sip_from = pjsip_uri_get_uri(from);
         ast_copy_pj_str(name, &sip_from->user, sizeof(name));
      }

      unid = ao2_find(unidentified_requests, rdata->pkt_info.src_name, OBJ_SEARCH_KEY);
      if (unid) {
         check_endpoint(rdata, unid, name);
         ao2_ref(unid, -1);
      } else if (using_auth_username) {
         ao2_wrlock(unidentified_requests);
         /* Checking again with the write lock held allows us to eliminate the DUPS_REPLACE and sort_fn */
         unid = ao2_find(unidentified_requests, rdata->pkt_info.src_name,
            OBJ_SEARCH_KEY | OBJ_NOLOCK);
         if (unid) {
            check_endpoint(rdata, unid, name);
         } else {
            unid = ao2_alloc_options(sizeof(*unid) + strlen(rdata->pkt_info.src_name) + 1,
               NULL, AO2_ALLOC_OPT_LOCK_RWLOCK);
            if (!unid) {
               ao2_unlock(unidentified_requests);
               pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 500, NULL, NULL, NULL);
               return PJ_TRUE;
            }
            strcpy(unid->src_name, rdata->pkt_info.src_name); /* Safe */
            unid->first_seen = ast_tvnow();
            unid->count = 1;
            ao2_link_flags(unidentified_requests, unid, OBJ_NOLOCK);
         }
         ao2_ref(unid, -1);
         ao2_unlock(unidentified_requests);
      } else {
         log_failed_request(rdata, "No matching endpoint found", 0, 0);
         ast_sip_report_invalid_endpoint(name, rdata);
      }
   }

   apply_acls(rdata);
   return PJ_FALSE;
}

expire_requests()

static int expire_requests ( void *  object, void *  arg, int  flags  )

static

Definition at line 1136 of file pjsip_distributor.c.

References ast_tvdiff_ms(), ast_tvnow(), CMP_MATCH, and unidentified_request::first_seen.

Referenced by prune_task().

{
   struct unidentified_request *unid = object;
   int *maxage = arg;
   int64_t ms = ast_tvdiff_ms(ast_tvnow(), unid->first_seen);

   if (ms > (*maxage) * 2 * 1000) {
      return CMP_MATCH;
   }

   return 0;
}

extract_contact_addr()

static int extract_contact_addr ( pjsip_contact_hdr *  contact, struct ast_sockaddr **  addrs  )

static

Definition at line 827 of file pjsip_distributor.c.

References AST_AF_UNSPEC, ast_copy_pj_str(), ast_sockaddr_resolve(), host, NULL, and PARSE_PORT_FORBID.

Referenced by apply_endpoint_contact_acl().

{
   pjsip_sip_uri *sip_uri;
   char host[256];

   if (!contact || contact->star) {
      *addrs = NULL;
      return 0;
   }
   if (!PJSIP_URI_SCHEME_IS_SIP(contact->uri) && !PJSIP_URI_SCHEME_IS_SIPS(contact->uri)) {
      *addrs = NULL;
      return 0;
   }
   sip_uri = pjsip_uri_get_uri(contact->uri);
   ast_copy_pj_str(host, &sip_uri->host, sizeof(host));
   return ast_sockaddr_resolve(addrs, host, PARSE_PORT_FORBID, AST_AF_UNSPEC);
}

find_dialog()

static pjsip_dialog* find_dialog ( pjsip_rx_data *  rdata )

static

Definition at line 339 of file pjsip_distributor.c.

References ast_debug, and NULL.

Referenced by distributor().

{
   pj_str_t tsx_key;
   pjsip_transaction *tsx;
   pjsip_dialog *dlg;
   pj_str_t *local_tag;
   pj_str_t *remote_tag;

   if (!rdata->msg_info.msg) {
      return NULL;
   }

   if (rdata->msg_info.msg->type == PJSIP_REQUEST_MSG) {
      local_tag = &rdata->msg_info.to->tag;
      remote_tag = &rdata->msg_info.from->tag;
   } else {
      local_tag = &rdata->msg_info.from->tag;
      remote_tag = &rdata->msg_info.to->tag;
   }

   /* We can only call the convenient method for
    *  1) responses
    *  2) non-CANCEL requests
    *  3) CANCEL requests with a to-tag
    */
   if (rdata->msg_info.msg->type == PJSIP_RESPONSE_MSG ||
         pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, &pjsip_cancel_method) ||
         rdata->msg_info.to->tag.slen != 0) {
      dlg = pjsip_ua_find_dialog(&rdata->msg_info.cid->id, local_tag,
            remote_tag, PJ_FALSE);
      if (dlg) {
         return dlg;
      }
   }

   /*
    * There may still be a matching dialog if this is
    * 1) an incoming CANCEL request without a to-tag
    * 2) an incoming response to a dialog-creating request.
    */
   if (rdata->msg_info.msg->type == PJSIP_REQUEST_MSG) {
      /* CANCEL requests will need to match the INVITE we initially received. Any
       * other request type will either have been matched already or is not in
       * dialog
       */
      pjsip_tsx_create_key(rdata->tp_info.pool, &tsx_key, PJSIP_ROLE_UAS,
            pjsip_get_invite_method(), rdata);
   } else {
      pjsip_tsx_create_key(rdata->tp_info.pool, &tsx_key, PJSIP_ROLE_UAC,
            &rdata->msg_info.cseq->method, rdata);
   }

   tsx = pjsip_tsx_layer_find_tsx(&tsx_key, PJ_TRUE);
   if (!tsx) {
      ast_debug(3, "Could not find matching transaction for %s\n",
         pjsip_rx_data_get_info(rdata));
      return NULL;
   }

   dlg = pjsip_tsx_get_dlg(tsx);

#ifdef HAVE_PJ_TRANSACTION_GRP_LOCK
   pj_grp_lock_release(tsx->grp_lock);
#else
   pj_mutex_unlock(tsx->mutex);
#endif

   return dlg;
}

find_request_serializer()

static struct ast_taskprocessor* find_request_serializer ( pjsip_rx_data *  rdata )

static

Definition at line 112 of file pjsip_distributor.c.

References ast_debug, ast_strlen_zero, ast_taskprocessor_get(), distributor_mod, NULL, and TPS_REF_IF_EXISTS.

Referenced by distributor().

{
   struct ast_taskprocessor *serializer = NULL;
   pj_str_t tsx_key;
   pjsip_transaction *tsx;

   pjsip_tsx_create_key(rdata->tp_info.pool, &tsx_key, PJSIP_ROLE_UAC,
      &rdata->msg_info.cseq->method, rdata);

   tsx = pjsip_tsx_layer_find_tsx(&tsx_key, PJ_TRUE);
   if (!tsx) {
      ast_debug(1, "Could not find transaction for %s.\n",
         pjsip_rx_data_get_info(rdata));
      return NULL;
   }
   ast_debug(3, "Found transaction %s for %s.\n",
      tsx->obj_name, pjsip_rx_data_get_info(rdata));

   if (tsx->last_tx) {
      const char *serializer_name;

      serializer_name = tsx->last_tx->mod_data[distributor_mod.id];
      if (!ast_strlen_zero(serializer_name)) {
         serializer = ast_taskprocessor_get(serializer_name, TPS_REF_IF_EXISTS);
         if (serializer) {
            ast_debug(3, "Found serializer %s on transaction %s\n",
                  serializer_name, tsx->obj_name);
         }
      }
   }

#ifdef HAVE_PJ_TRANSACTION_GRP_LOCK
   pj_grp_lock_release(tsx->grp_lock);
#else
   pj_mutex_unlock(tsx->mutex);
#endif

   return serializer;
}

global_loaded()

static void global_loaded ( const char *  object_type )

static

Definition at line 1165 of file pjsip_distributor.c.

References alloc_artificial_auth(), ao2_cleanup, ao2_global_obj_replace_unref, ast_free, ast_sched_add_variable(), ast_sched_clean_by_callback(), ast_sip_get_artificial_auth(), ast_sip_get_default_realm(), ast_sip_get_endpoint_identifier_order(), ast_sip_get_taskprocessor_overload_trigger(), ast_sip_get_unidentified_request_thresholds(), ast_strdupa, ast_strip(), clean_task(), default_realm, MAX_REALM_LENGTH, NULL, overload_trigger, prune_task(), ast_sip_auth::realm, strsep(), unidentified_count, unidentified_period, unidentified_prune_interval, and using_auth_username.

{
   char default_realm[MAX_REALM_LENGTH + 1];
   struct ast_sip_auth *fake_auth;
   char *identifier_order;

   /* Update using_auth_username */
   identifier_order = ast_sip_get_endpoint_identifier_order();
   if (identifier_order) {
      char *identify_method;
      char *io_copy = ast_strdupa(identifier_order);
      int new_using = 0;

      ast_free(identifier_order);
      while ((identify_method = ast_strip(strsep(&io_copy, ",")))) {
         if (!strcmp(identify_method, "auth_username")) {
            new_using = 1;
            break;
         }
      }
      using_auth_username = new_using;
   }

   /* Update default_realm of artificial_auth */
   ast_sip_get_default_realm(default_realm, sizeof(default_realm));
   fake_auth = ast_sip_get_artificial_auth();
   if (!fake_auth || strcmp(fake_auth->realm, default_realm)) {
      ao2_cleanup(fake_auth);

      fake_auth = alloc_artificial_auth(default_realm);
      if (fake_auth) {
         ao2_global_obj_replace_unref(artificial_auth, fake_auth);
      }
   }
   ao2_cleanup(fake_auth);

   ast_sip_get_unidentified_request_thresholds(&unidentified_count, &unidentified_period, &unidentified_prune_interval);

   overload_trigger = ast_sip_get_taskprocessor_overload_trigger();

   /* Clean out the old task, if any */
   ast_sched_clean_by_callback(prune_context, prune_task, clean_task);
   /* Have to do something with the return value to shut up the stupid compiler. */
   if (ast_sched_add_variable(prune_context, unidentified_prune_interval * 1000, prune_task, NULL, 1) < 0) {
      return;
   }
}

log_failed_request()

static void log_failed_request ( pjsip_rx_data *  rdata, char *  msg, unsigned int  count, unsigned int  period  )

static

Definition at line 660 of file pjsip_distributor.c.

References ast_copy_pj_str(), ast_log, AST_SOCKADDR_BUFLEN, and LOG_NOTICE.

Referenced by apply_endpoint_acl(), apply_endpoint_contact_acl(), authenticate(), check_endpoint(), and endpoint_lookup().

{
   char from_buf[PJSIP_MAX_URL_SIZE];
   char callid_buf[PJSIP_MAX_URL_SIZE];
   char method_buf[PJSIP_MAX_URL_SIZE];
   char src_addr_buf[AST_SOCKADDR_BUFLEN];
   pjsip_uri_print(PJSIP_URI_IN_FROMTO_HDR, rdata->msg_info.from->uri, from_buf, PJSIP_MAX_URL_SIZE);
   ast_copy_pj_str(callid_buf, &rdata->msg_info.cid->id, PJSIP_MAX_URL_SIZE);
   ast_copy_pj_str(method_buf, &rdata->msg_info.msg->line.req.method.name, PJSIP_MAX_URL_SIZE);
   if (count) {
      ast_log(LOG_NOTICE, "Request '%s' from '%s' failed for '%s' (callid: %s) - %s"
         " after %u tries in %.3f ms\n",
         method_buf, from_buf,
         pj_sockaddr_print(&rdata->pkt_info.src_addr, src_addr_buf, sizeof(src_addr_buf), 3),
         callid_buf, msg, count, period / 1000.0);
   } else {
      ast_log(LOG_NOTICE, "Request '%s' from '%s' failed for '%s' (callid: %s) - %s\n",
         method_buf, from_buf,
         pj_sockaddr_print(&rdata->pkt_info.src_addr, src_addr_buf, sizeof(src_addr_buf), 3),
         callid_buf, msg);
   }
}

pjstr_hash()

static int pjstr_hash ( pj_str_t *  str )

static

Definition at line 443 of file pjsip_distributor.c.

References pjstr_hash_add().

Referenced by ast_sip_get_distributor_serializer().

{
   return pjstr_hash_add(str, 5381);
}

pjstr_hash_add()

static int pjstr_hash_add ( pj_str_t *  str, int  hash  )

static

Definition at line 426 of file pjsip_distributor.c.

References buf_hash_add().

Referenced by ast_sip_get_distributor_serializer(), and pjstr_hash().

{
   return buf_hash_add(pj_strbuf(str), pj_strlen(str), hash);
}

prune_task()

static int prune_task ( const void *  data )

static

Definition at line 1149 of file pjsip_distributor.c.

References ao2_callback, ast_sip_get_unidentified_request_thresholds(), expire_requests(), OBJ_MULTIPLE, OBJ_NODATA, OBJ_UNLINK, unidentified_count, unidentified_period, and unidentified_prune_interval.

Referenced by global_loaded().

{
   unsigned int maxage;

   ast_sip_get_unidentified_request_thresholds(&unidentified_count, &unidentified_period, &unidentified_prune_interval);
   maxage = unidentified_period * 2;
   ao2_callback(unidentified_requests, OBJ_MULTIPLE | OBJ_NODATA | OBJ_UNLINK, expire_requests, &maxage);

   return unidentified_prune_interval * 1000;
}

record_serializer()

static pj_status_t record_serializer ( pjsip_tx_data *  tdata )

static

Definition at line 77 of file pjsip_distributor.c.

References ast_strlen_zero, ast_taskprocessor_name(), ast_threadpool_serializer_get_current(), distributor_mod, and name.

{
   struct ast_taskprocessor *serializer;

   serializer = ast_threadpool_serializer_get_current();
   if (serializer) {
      const char *name;

      name = ast_taskprocessor_name(serializer);
      if (!ast_strlen_zero(name)
         && (!tdata->mod_data[distributor_mod.id]
            || strcmp(tdata->mod_data[distributor_mod.id], name))) {
         char *tdata_name;

         /* The serializer in use changed. */
         tdata_name = pj_pool_alloc(tdata->pool, strlen(name) + 1);
         strcpy(tdata_name, name);/* Safe */

         tdata->mod_data[distributor_mod.id] = tdata_name;
      }
   }

   return PJ_SUCCESS;
}

suspects_compare()

static int suspects_compare ( void *  obj, void *  arg, int  flags  )

static

Definition at line 1002 of file pjsip_distributor.c.

References CMP_MATCH, OBJ_SEARCH_KEY, OBJ_SEARCH_MASK, OBJ_SEARCH_OBJECT, OBJ_SEARCH_PARTIAL_KEY, and unidentified_request::src_name.

Referenced by ast_sip_initialize_distributor(), and cli_unid_get_container().

{
   const struct unidentified_request *object_left = obj;
   const struct unidentified_request *object_right = arg;
   const char *right_key = arg;
   int cmp = 0;

   switch (flags & OBJ_SEARCH_MASK) {
   case OBJ_SEARCH_OBJECT:
      right_key = object_right->src_name;
      /* Fall through */
   case OBJ_SEARCH_KEY:
      if (strcmp(object_left->src_name, right_key) == 0) {
         cmp = CMP_MATCH;
      }
      break;
   case OBJ_SEARCH_PARTIAL_KEY:
      if (strncmp(object_left->src_name, right_key, strlen(right_key)) == 0) {
         cmp = CMP_MATCH;
      }
      break;
   default:
      cmp = 0;
      break;
   }
   return cmp;
}

suspects_hash()

static int suspects_hash ( const void *  obj, int  flags  )

static

Definition at line 1030 of file pjsip_distributor.c.

References ast_assert, ast_str_hash(), OBJ_SEARCH_KEY, OBJ_SEARCH_MASK, and OBJ_SEARCH_OBJECT.

Referenced by ast_sip_initialize_distributor().

{
   const struct unidentified_request *object;
   const char *key;

   switch (flags & OBJ_SEARCH_MASK) {
   case OBJ_SEARCH_KEY:
      key = obj;
      break;
   case OBJ_SEARCH_OBJECT:
      object = obj;
      key = object->src_name;
      break;
   default:
      /* Hash can only work on something with a full key. */
      ast_assert(0);
      return 0;
   }
   return ast_str_hash(key);
}

suspects_sort()

static int suspects_sort ( const void *  obj, const void *  arg, int  flags  )

static

Definition at line 978 of file pjsip_distributor.c.

References OBJ_SEARCH_KEY, OBJ_SEARCH_MASK, OBJ_SEARCH_OBJECT, OBJ_SEARCH_PARTIAL_KEY, and unidentified_request::src_name.

Referenced by cli_unid_get_container().

{
   const struct unidentified_request *object_left = obj;
   const struct unidentified_request *object_right = arg;
   const char *right_key = arg;
   int cmp;

   switch (flags & OBJ_SEARCH_MASK) {
   case OBJ_SEARCH_OBJECT:
      right_key = object_right->src_name;
      /* Fall through */
   case OBJ_SEARCH_KEY:
      cmp = strcmp(object_left->src_name, right_key);
      break;
   case OBJ_SEARCH_PARTIAL_KEY:
      cmp = strncmp(object_left->src_name, right_key, strlen(right_key));
      break;
   default:
      cmp = 0;
      break;
   }
   return cmp;
}

Variable Documentation

artificial_endpoint

struct ast_sip_endpoint* artificial_endpoint = NULL

static

Definition at line 636 of file pjsip_distributor.c.

Referenced by ast_sip_get_artificial_endpoint(), and digest_check_auth().

auth_mod

pjsip_module auth_mod

static

Initial value:

= {
   .name = {"Request Authenticator", 21},
   .priority = PJSIP_MOD_PRIORITY_APPLICATION - 2,
   .on_rx_request = authenticate,
}

Definition at line 937 of file pjsip_distributor.c.

Referenced by ast_sip_destroy_distributor(), and ast_sip_initialize_distributor().

cli_commands

struct ast_cli_entry cli_commands[]

static

Definition at line 1127 of file pjsip_distributor.c.

dialog_associations

struct ao2_container* dialog_associations

static

Definition at line 164 of file pjsip_distributor.c.

distributor_mod

pjsip_module distributor_mod

static

Definition at line 34 of file pjsip_distributor.c.

Referenced by ast_sip_destroy_distributor(), ast_sip_initialize_distributor(), distribute(), find_request_serializer(), and record_serializer().

distributor_pool

struct ast_taskprocessor* distributor_pool[DISTRIBUTOR_POOL_SIZE]

static

Pool of serializers to use if not supplied.

Definition at line 66 of file pjsip_distributor.c.

endpoint_mod

pjsip_module endpoint_mod

static

Initial value:

= {
   .name = {"Endpoint Identifier", 19},
   .priority = PJSIP_MOD_PRIORITY_TSX_LAYER - 3,
   .on_rx_request = endpoint_lookup,
}

Definition at line 479 of file pjsip_distributor.c.

Referenced by apply_acls(), ast_pjsip_rdata_get_endpoint(), ast_sip_destroy_distributor(), ast_sip_initialize_distributor(), distribute(), distributor(), and endpoint_lookup().

global_observer

struct ast_sorcery_observer global_observer

static

Initial value:

= {
   .loaded = global_loaded,
}

Observer which is used to update our interval and default_realm when the global setting changes.

Definition at line 1214 of file pjsip_distributor.c.

overload_trigger

enum ast_sip_taskprocessor_overload_trigger overload_trigger

static

Definition at line 54 of file pjsip_distributor.c.

Referenced by distributor(), and global_loaded().

prune_context

struct ast_sched_context* prune_context

Definition at line 42 of file pjsip_distributor.c.

unid_formatter

struct ast_sip_cli_formatter_entry* unid_formatter

Definition at line 1134 of file pjsip_distributor.c.

unidentified_count

unsigned int unidentified_count

static

Definition at line 50 of file pjsip_distributor.c.

Referenced by check_endpoint(), global_loaded(), and prune_task().

unidentified_period

unsigned int unidentified_period

static

Definition at line 51 of file pjsip_distributor.c.

Referenced by check_endpoint(), global_loaded(), and prune_task().

unidentified_prune_interval

unsigned int unidentified_prune_interval

static

Definition at line 52 of file pjsip_distributor.c.

Referenced by global_loaded(), and prune_task().

unidentified_requests

struct ao2_container* unidentified_requests

static

Definition at line 49 of file pjsip_distributor.c.

using_auth_username

int using_auth_username

static

Definition at line 53 of file pjsip_distributor.c.

Referenced by endpoint_lookup(), and global_loaded().