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/* $Id: sip_endpoint.h 4154 2012-06-05 10:41:17Z bennylp $ */
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* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
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* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#ifndef __PJSIP_SIP_ENDPOINT_H__
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#define __PJSIP_SIP_ENDPOINT_H__
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* @file sip_endpoint.h
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* @brief SIP Endpoint.
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#include <pjsip/sip_transport.h>
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#include <pjsip/sip_resolve.h>
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* @defgroup PJSIP_CORE_CORE At the Very Core
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* @brief The very core of PJSIP.
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* @defgroup PJSIP_ENDPT Endpoint
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* @ingroup PJSIP_CORE_CORE
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* @brief The master, owner of all objects
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* SIP Endpoint instance (pjsip_endpoint) can be viewed as the master/owner of
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* all SIP objects in an application. It performs the following roles:
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* - it manages the allocation/deallocation of memory pools for all objects.
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* - it manages listeners and transports, and how they are used by
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* - it receives incoming messages from transport layer and automatically
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* dispatches them to the correct transaction (or create a new one).
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* - it has a single instance of timer management (timer heap).
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* - it manages modules, which is the primary means of extending the library.
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* - it provides single polling function for all objects and distributes
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* - it automatically handles incoming requests which can not be handled by
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* existing modules (such as when incoming request has unsupported method).
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* Application should only instantiate one SIP endpoint instance for every
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* Type of callback to register to pjsip_endpt_atexit().
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typedef void (*pjsip_endpt_exit_callback)(pjsip_endpoint *endpt);
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* Create an instance of SIP endpoint from the specified pool factory.
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* The pool factory reference then will be kept by the endpoint, so that
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* future memory allocations by SIP components will be taken from the same
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* @param pf Pool factory that will be used for the lifetime of
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* @param name Optional name to be specified for the endpoint.
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* If this parameter is NULL, then the name will use
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* @param endpt Pointer to receive endpoint instance.
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* @return PJ_SUCCESS on success.
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PJ_DECL(pj_status_t) pjsip_endpt_create(pj_pool_factory *pf,
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pjsip_endpoint **endpt);
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* Destroy endpoint instance. Application must make sure that all pending
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* transactions have been terminated properly, because this function does not
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* check for the presence of pending transactions.
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* @param endpt The SIP endpoint to be destroyed.
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PJ_DECL(void) pjsip_endpt_destroy(pjsip_endpoint *endpt);
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* @param endpt The SIP endpoint instance.
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* @return Endpoint name, as was registered during endpoint
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* creation. The string is NULL terminated.
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PJ_DECL(const pj_str_t*) pjsip_endpt_name(const pjsip_endpoint *endpt);
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* Poll for events. Application must call this function periodically to ensure
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* that all events from both transports and timer heap are handled in timely
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* manner. This function, like all other endpoint functions, is thread safe,
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* and application may have more than one thread concurrently calling this function.
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* @param endpt The endpoint.
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* @param max_timeout Maximum time to wait for events, or NULL to wait forever
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* until event is received.
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* @return PJ_SUCCESS on success.
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PJ_DECL(pj_status_t) pjsip_endpt_handle_events( pjsip_endpoint *endpt,
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const pj_time_val *max_timeout);
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* Handle events with additional info about number of events that
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* @param endpt The endpoint.
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* @param max_timeout Maximum time to wait for events, or NULL to wait forever
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* until event is received.
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* @param count Optional argument to receive the number of events that
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* have been handled by the function.
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* @return PJ_SUCCESS on success.
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PJ_DECL(pj_status_t) pjsip_endpt_handle_events2(pjsip_endpoint *endpt,
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const pj_time_val *max_timeout,
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* Schedule timer to endpoint's timer heap. Application must poll the endpoint
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* periodically (by calling #pjsip_endpt_handle_events) to ensure that the
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* timer events are handled in timely manner. When the timeout for the timer
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* has elapsed, the callback specified in the entry argument will be called.
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* This function, like all other endpoint functions, is thread safe.
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* @param endpt The endpoint.
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* @param entry The timer entry.
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* @param delay The relative delay of the timer.
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* @return PJ_OK (zero) if successfull.
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#define pjsip_endpt_schedule_timer(ept,ent,d) \
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pjsip_endpt_schedule_timer_dbg(ept, ent, d, \
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PJ_DECL(pj_status_t) pjsip_endpt_schedule_timer_dbg(pjsip_endpoint *endpt,
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pj_timer_entry *entry,
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const pj_time_val *delay,
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const char *src_file,
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PJ_DECL(pj_status_t) pjsip_endpt_schedule_timer( pjsip_endpoint *endpt,
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pj_timer_entry *entry,
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const pj_time_val *delay );
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* Cancel the previously registered timer.
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* This function, like all other endpoint functions, is thread safe.
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* @param endpt The endpoint.
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* @param entry The timer entry previously registered.
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PJ_DECL(void) pjsip_endpt_cancel_timer( pjsip_endpoint *endpt,
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pj_timer_entry *entry );
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* Get the timer heap instance of the SIP endpoint.
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* @param endpt The endpoint.
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* @return The timer heap instance.
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PJ_DECL(pj_timer_heap_t*) pjsip_endpt_get_timer_heap(pjsip_endpoint *endpt);
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* Register new module to the endpoint.
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* The endpoint will then call the load and start function in the module to
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* properly initialize the module, and assign a unique module ID for the
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* @param endpt The endpoint.
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* @param module The module to be registered.
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* @return PJ_SUCCESS on success.
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PJ_DECL(pj_status_t) pjsip_endpt_register_module( pjsip_endpoint *endpt,
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pjsip_module *module );
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* Unregister a module from the endpoint.
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* The endpoint will then call the stop and unload function in the module to
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* properly shutdown the module.
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* @param endpt The endpoint.
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* @param module The module to be registered.
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* @return PJ_SUCCESS on success.
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PJ_DECL(pj_status_t) pjsip_endpt_unregister_module( pjsip_endpoint *endpt,
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pjsip_module *module );
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* Create pool from the endpoint. All SIP components should allocate their
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* memory pool by calling this function, to make sure that the pools are
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* allocated from the same pool factory. This function, like all other endpoint
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* functions, is thread safe.
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* @param endpt The SIP endpoint.
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* @param pool_name Name to be assigned to the pool.
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* @param initial The initial size of the pool.
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* @param increment The resize size.
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* @return Memory pool, or NULL on failure.
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* @see pj_pool_create
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PJ_DECL(pj_pool_t*) pjsip_endpt_create_pool( pjsip_endpoint *endpt,
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const char *pool_name,
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pj_size_t increment );
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* Return back pool to endpoint to be released back to the pool factory.
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* This function, like all other endpoint functions, is thread safe.
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* @param endpt The endpoint.
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* @param pool The pool to be destroyed.
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PJ_DECL(void) pjsip_endpt_release_pool( pjsip_endpoint *endpt,
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* Find transaction in endpoint's transaction table by the transaction's key.
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* This function normally is only used by modules. The key for a transaction
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* can be created by calling #pjsip_tsx_create_key.
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* @param endpt The endpoint instance.
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* @param key Transaction key, as created with #pjsip_tsx_create_key.
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* @return The transaction, or NULL if it's not found.
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PJ_DECL(pjsip_transaction*) pjsip_endpt_find_tsx( pjsip_endpoint *endpt,
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const pj_str_t *key );
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* Register the transaction to the endpoint's transaction table.
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* This function should only be used internally by the stack.
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* @param endpt The SIP endpoint.
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* @param tsx The transaction.
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PJ_DECL(void) pjsip_endpt_register_tsx( pjsip_endpoint *endpt,
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pjsip_transaction *tsx);
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* Forcefull destroy the transaction. This function should only be used
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* internally by the stack.
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* @param endpt The endpoint.
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* @param tsx The transaction to destroy.
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PJ_DECL(void) pjsip_endpt_destroy_tsx( pjsip_endpoint *endpt,
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pjsip_transaction *tsx);
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* Create a new transmit data buffer.
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* This function, like all other endpoint functions, is thread safe.
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* @param endpt The endpoint.
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* @param p_tdata Pointer to receive transmit data buffer.
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* @return PJ_SUCCESS or the appropriate error code.
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PJ_DECL(pj_status_t) pjsip_endpt_create_tdata( pjsip_endpoint *endpt,
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pjsip_tx_data **p_tdata);
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* Create the DNS resolver instance. Application creates the DNS
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* resolver instance, set the nameserver to be used by the DNS
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* resolver, then set the DNS resolver to be used by the endpoint
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* by calling #pjsip_endpt_set_resolver().
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* @param endpt The SIP endpoint instance.
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* @param p_resv Pointer to receive the DNS resolver instance.
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* @return PJ_SUCCESS on success, or the appropriate error
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PJ_DECL(pj_status_t) pjsip_endpt_create_resolver(pjsip_endpoint *endpt,
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pj_dns_resolver **p_resv);
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* Set DNS resolver to be used by the SIP resolver. Application can set
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* the resolver instance to NULL to disable DNS resolution (perhaps
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* temporarily). When DNS resolver is disabled, the endpoint will resolve
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* hostnames with the normal pj_gethostbyname() function.
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* @param endpt The SIP endpoint instance.
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* @param resv The resolver instance to be used by the SIP
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* @return PJ_SUCCESS on success, or the appropriate error
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PJ_DECL(pj_status_t) pjsip_endpt_set_resolver(pjsip_endpoint *endpt,
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pj_dns_resolver *resv);
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* Get the DNS resolver being used by the SIP resolver.
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* @param endpt The SIP endpoint instance.
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* @return The DNS resolver instance currently being used
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* by the SIP endpoint.
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PJ_DECL(pj_dns_resolver*) pjsip_endpt_get_resolver(pjsip_endpoint *endpt);
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* Asynchronously resolve a SIP target host or domain according to rule
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* specified in RFC 3263 (Locating SIP Servers). When the resolving operation
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* has completed, the callback will be called.
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* @param endpt The endpoint instance.
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* @param pool The pool to allocate resolver job.
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* @param target The target specification to be resolved.
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* @param token A user defined token to be passed back to callback function.
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* @param cb The callback function.
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PJ_DECL(void) pjsip_endpt_resolve( pjsip_endpoint *endpt,
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pjsip_host_info *target,
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pjsip_resolver_callback *cb);
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* Get transport manager instance.
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* @param endpt The endpoint.
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* @return Transport manager instance.
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PJ_DECL(pjsip_tpmgr*) pjsip_endpt_get_tpmgr(pjsip_endpoint *endpt);
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* Get ioqueue instance.
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* @param endpt The endpoint.
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* @return The ioqueue.
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PJ_DECL(pj_ioqueue_t*) pjsip_endpt_get_ioqueue(pjsip_endpoint *endpt);
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* Find a SIP transport suitable for sending SIP message to the specified
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* address. If transport selector ("sel") is set, then the function will
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* check if the transport selected is suitable to send requests to the
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* @see pjsip_tpmgr_acquire_transport
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* @param endpt The SIP endpoint instance.
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* @param type The type of transport to be acquired.
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* @param remote The remote address to send message to.
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* @param addr_len Length of the remote address.
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* @param sel Optional pointer to transport selector instance which is
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* used to find explicit transport, if required.
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* @param p_tp Pointer to receive the transport instance, if one is found.
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* @return PJ_SUCCESS on success, or the appropriate error code.
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pjsip_endpt_acquire_transport( pjsip_endpoint *endpt,
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pjsip_transport_type_e type,
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const pj_sockaddr_t *remote,
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const pjsip_tpselector *sel,
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pjsip_transport **p_tp);
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* Find a SIP transport suitable for sending SIP message to the specified
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* address by also considering the outgoing SIP message data. If transport
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* selector ("sel") is set, then the function will check if the transport
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* selected is suitable to send requests to the specified address.
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* @see pjsip_tpmgr_acquire_transport
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* @param endpt The SIP endpoint instance.
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* @param type The type of transport to be acquired.
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* @param remote The remote address to send message to.
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* @param addr_len Length of the remote address.
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* @param sel Optional pointer to transport selector instance which is
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* used to find explicit transport, if required.
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* @param tdata Optional pointer to SIP message data to be sent.
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* @param p_tp Pointer to receive the transport instance, if one is found.
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* @return PJ_SUCCESS on success, or the appropriate error code.
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pjsip_endpt_acquire_transport2(pjsip_endpoint *endpt,
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pjsip_transport_type_e type,
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const pj_sockaddr_t *remote,
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const pjsip_tpselector *sel,
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pjsip_tx_data *tdata,
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pjsip_transport **p_tp);
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/*****************************************************************************
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* Capabilities Management
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* Modules may implement new capabilities to the stack. These capabilities
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* are indicated by the appropriate SIP header fields, such as Accept,
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* Accept-Encoding, Accept-Language, Allow, Supported, etc.
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* When a module provides new capabilities to the stack, it registers these
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* capabilities to the endpoint by supplying new tags (strings) to the
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* appropriate header fields. Application (or other modules) can then query
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* these header fields to get the list of supported capabilities, and may
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* include these headers in the outgoing message.
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*****************************************************************************
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* Get the value of the specified capability header field.
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* @param endpt The endpoint.
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* @param htype The header type to be retrieved, which value may be:
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* - PJSIP_H_SUPPORTED
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* @param hname If htype specifies PJSIP_H_OTHER, then the header name
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* must be supplied in this argument. Otherwise the value
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* must be set to NULL.
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* @return The appropriate header, or NULL if the header is not
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PJ_DECL(const pjsip_hdr*) pjsip_endpt_get_capability( pjsip_endpoint *endpt,
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const pj_str_t *hname);
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* Check if we have the specified capability.
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* @param endpt The endpoint.
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* @param htype The header type to be retrieved, which value may be:
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* - PJSIP_H_SUPPORTED
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* @param hname If htype specifies PJSIP_H_OTHER, then the header name
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* must be supplied in this argument. Otherwise the value
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* must be set to NULL.
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* @param token The capability token to check. For example, if \a htype
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* is PJSIP_H_ALLOW, then \a token specifies the method
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* names; if \a htype is PJSIP_H_SUPPORTED, then \a token
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* specifies the extension names such as "100rel".
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* @return PJ_TRUE if the specified capability is supported,
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* otherwise PJ_FALSE..
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PJ_DECL(pj_bool_t) pjsip_endpt_has_capability( pjsip_endpoint *endpt,
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const pj_str_t *hname,
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const pj_str_t *token);
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* Add or register new capabilities as indicated by the tags to the
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* appropriate header fields in the endpoint.
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* @param endpt The endpoint.
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* @param mod The module which registers the capability.
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* @param htype The header type to be set, which value may be:
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* - PJSIP_H_SUPPORTED
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* @param hname If htype specifies PJSIP_H_OTHER, then the header name
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* must be supplied in this argument. Otherwise the value
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* must be set to NULL.
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* @param count The number of tags in the array.
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* @param tags Array of tags describing the capabilities or extensions
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* to be added to the appropriate header.
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* @return PJ_SUCCESS on success.
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PJ_DECL(pj_status_t) pjsip_endpt_add_capability( pjsip_endpoint *endpt,
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const pj_str_t *hname,
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const pj_str_t tags[]);
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* Get list of additional headers to be put in outgoing request message.
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* Currently only Max-Forwards are defined.
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* @param e The endpoint.
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* @return List of headers.
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PJ_DECL(const pjsip_hdr*) pjsip_endpt_get_request_headers(pjsip_endpoint *e);
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* Dump endpoint status to the log. This will print the status to the log
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* @param endpt The endpoint.
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* @param detail If non zero, then it will dump a detailed output.
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* BEWARE that this option may crash the system because
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* it tries to access all memory pools.
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PJ_DECL(void) pjsip_endpt_dump( pjsip_endpoint *endpt, pj_bool_t detail );
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* Register cleanup function to be called by SIP endpoint when
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* #pjsip_endpt_destroy() is called. Note that application should not
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* use or access any endpoint resource (such as pool, ioqueue, timer heap)
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* from within the callback as such resource may have been released when
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* the callback function is invoked.
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* @param endpt The SIP endpoint.
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* @param func The function to be registered.
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* @return PJ_SUCCESS on success.
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PJ_DECL(pj_status_t) pjsip_endpt_atexit(pjsip_endpoint *endpt,
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pjsip_endpt_exit_callback func);
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PJ_DECL(void) pjsip_endpt_log_error( pjsip_endpoint *endpt,
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pj_status_t error_code,
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#define PJSIP_ENDPT_LOG_ERROR(expr) \
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pjsip_endpt_log_error expr
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#define PJSIP_ENDPT_TRACE(tracing,expr) \
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* Internal functions.
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* Receive transaction events from transactions and put in the event queue
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* to be processed later.
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void pjsip_endpt_send_tsx_event( pjsip_endpoint *endpt, pjsip_event *evt );
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#endif /* __PJSIP_SIP_ENDPOINT_H__ */