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Diffstat (limited to 'pjsip/include/pjsip-ua/sip_dialog.h')
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1 files changed, 0 insertions, 635 deletions
diff --git a/pjsip/include/pjsip-ua/sip_dialog.h b/pjsip/include/pjsip-ua/sip_dialog.h deleted file mode 100644 index d46e3873..00000000 --- a/pjsip/include/pjsip-ua/sip_dialog.h +++ /dev/null @@ -1,635 +0,0 @@ -/* $Id$ */ -/* - * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -#ifndef __PJSIP_DIALOG_H__ -#define __PJSIP_DIALOG_H__ - -/** - * @file dialog.h - * @brief SIP Dialog abstraction - */ - -#include <pjsip/sip_msg.h> -#include <pjsip/sip_auth.h> -#include <pj/sock.h> - -PJ_BEGIN_DECL - -/** - * @defgroup PJSUA_DIALOG SIP Dialog - * @ingroup PJSUA - * @{ - * \brief - * This file contains SIP dialog, a higher level abstraction of SIP session. - * - * \par Overview - * A SIP dialog is an abstraction of communication session between two user - * agents that persist for some time. The dialog facilitates sequencing of - * messages between the user agents and proper routing of requests between both - * of them. The dialog represents a context in which to interpret SIP messages. - * However method independent User Agent processing for requests and responses - * outside of a dialog exists, hence a dialog is not necessary for message - * processing. - * - * A dialog is identified at each User Agent with a dialog Id, which consists - * of a Call-Id value, a local tag and a remote tag. - * - * A dialog contains certain pieces of data needed for further message - * transmissions within the dialog. This data consists of: - * - Dialog Id - used to identify the dialog. - * - Local sequence number - used to order requests from the UA to its peer. - * - Remote sequence number - used to order requests from its peer to the UA. - * - Local URI - the address of the local party. - * - Remote URI - the address of the remote party. - * - Remote target - the address from the Contact header field of the request - * or response or refresh request or response. - * - "secure" boolean - determines if the dialog is secure. - * - Route set - an ordered list of URIs. The route set is the list of servers - * that need to be traversed to send a request to the peer. - * - Authentication info - array of authentication credentials to be used - * by the dialog to authenticate to proxies and servers. - * - * \par Manipulating Dialog - * Application should use functions declared in this file to do something with - * the dialog. Among other things, application can: - * - create outgoing dialog (#pjsip_dlg_init()). - * - sends outgoing invitation (#pjsip_dlg_invite()). - * - sends response (provisional and final) to incoming invitation - * (#pjsip_dlg_answer()) - * - disconnect dialog (#pjsip_dlg_disconnect()). - * - send other request (#pjsip_dlg_create_request() and #pjsip_dlg_send_msg()) - * - * \par Getting Dialog's Notification - * Dialog emits notification about various things that's happening to it (e.g. - * a message is received, dialog state has changed, etc.). Normally it is in - * the interest of the application to capture these notifications, by - * supplying the function to be called when the event occurs in #pjsip_dlg_callback - * structure, and register this structure to user agent by calling - * #pjsip_ua_set_dialog_callback(). - * - * \par Incoming Invitation - * Upon receiving a new incoming invitation, user agent will automatically create - * a new dialog, and inform application via \b pjsip_dlg_callback. - */ - -/** Forward declaration for user agent structure. */ -typedef struct pjsip_user_agent pjsip_user_agent; - -/** Forward declaration for dialog structure. */ -typedef struct pjsip_dlg pjsip_dlg; - -/** - * \brief Type of events that are reported by the dialog to the application callback - * function. - */ -typedef enum pjsip_dlg_event_e -{ - /** Dialog state has changed. */ - PJSIP_DIALOG_EVENT_STATE_CHANGED, - - /** Any mid-call messages (reinvitation, message, etc.). */ - PJSIP_DIALOG_EVENT_MID_CALL_REQUEST, - - /** Other events (low level events). */ - PJSIP_DIALOG_EVENT_OTHER, - -} pjsip_dlg_event_e; - - -/** - * \brief Structure registered by applications to receive dialog notifications - * from the User Agent. - * - * Applications registers this structure to get notifications from the User Agent - * about dialog state changes and other events. Application can set any of - * the callback function to NULL if it doesn't want to handle the notification, - * however, setting some callbacks to NULL probably will cause some undesired - * result (such as setting \b on_incoming to NULL will cause the creation of - * a lot of dialogs with no owner). - */ -struct pjsip_dlg_callback -{ - /** - * This is a low level, uninterpreted callback that is called by framework - * for all kinds of events, such as transaction events, dialog events, etc. - * @param dlg The dialog. - * @param dlg_event The type of dialog event. - * @param event The event descriptor. - */ - void (*on_all_events)(pjsip_dlg *dlg, pjsip_dlg_event_e dlg_event, - pjsip_event *event ); - - /** - * This is a low level callback that is called by the framework when the - * underlying transaction is about to send outgoing message. This callback - * is provided to allow application to modify the message before it is - * transmitted. - * @param dlg The dialog. - * @param tsx The transaction that transmits the message. - * @param tdata The transmission data, which contains the message. - * @param retransmission The number of times this message has been sent. - * Zero indicates the message is about to be sent the first time, - * one indicates this is the first retransmission, etc. - */ - void (*on_before_tx)(pjsip_dlg *dlg, pjsip_transaction *tsx, - pjsip_tx_data *tdata, pj_bool_t retransmission); - - /** - * This is a low level callback that is called by the framework when the dialog - * has sent a message. Note that a receive of retransmission will not trigger - * this callback since retransmission is handled internally by transaction. - * @param dlg The dialog. - * @param tsx The transaction that transmits the message. - * @param tdata The transmission data, which contains the message. - */ - void (*on_tx_msg)(pjsip_dlg *dlg, pjsip_transaction *tsx, - pjsip_tx_data *tdata); - - /** - * This is a low level callback that is called by the framework when the - * dialog has received a message. Note that a receipt of retransmission - * will not trigger this callback since retransmission is handled internally - * by transaction. - * @param dlg The dialog. - * @param tsx The transaction that receives the message. - * @param rdata The receive data, which contains the message. - */ - void (*on_rx_msg)(pjsip_dlg *dlg, pjsip_transaction *tsx, - pjsip_rx_data *rdata); - - /** - * This callback is called by the framework when the user agent - * instance receives an incoming INVITE message. - * @param dlg The new dialog that's just created to handle the incoming call. - * @param tsx The INVITE transaction that's just created. - * @param rdata The receive data, which contains the INVITE message. - */ - void (*on_incoming)(pjsip_dlg *dlg, pjsip_transaction *tsx, - pjsip_rx_data *rdata); - - /** - * This callback is called by the framework when the dialog is sending - * the first outgoing INVITE message. - * @param dlg The dialog. - * @param tsx The INVITE transaction. - * @param tdata The transmit data, which contains the INVITE message. - */ - void (*on_calling)(pjsip_dlg *dlg, pjsip_transaction *tsx, - pjsip_tx_data *tdata); - - /** - * This callback is called by the framework when the initial INVITE - * transaction has sent/received provisional response. - * @param dlg The dialog. - * @param tsx The transaction. - * @param event The event, which src_type will always be either - * PJSIP_EVENT_RX_MSG or PJSIP_EVENT_TX_MSG. The provisional - * response message itself will be in either \b rdata or \b tdata. - * @see pjsip_event. - */ - void (*on_provisional)(pjsip_dlg *dlg, pjsip_transaction *tsx, - pjsip_event *event); - - /** - * This callback is called for both UAS and UAC dialog when 200 response - * to INVITE is sent or received. - * @param dlg The dialog. - * @param event The event, which src_type can only be either - * PJSIP_EVENT_TX_MSG or PJSIP_EVENT_RX_MSG. - * @see pjsip_event - */ - void (*on_connecting)(pjsip_dlg *dlg, pjsip_event *event); - - /** - * This callback is called for both UAS and UAC when an ACK request is - * sent or received by the dialog. - * @param dlg The dialog. - * @param event The event, which src_type can only be either - * PJSIP_EVENT_TX_MSG or PJSIP_EVENT_RX_MSG. - * @see pjsip_event - */ - void (*on_established)(pjsip_dlg *dlg, pjsip_event *event); - - /** - * This callback is called when the dialog is disconnected, i.e. upon - * sending/receiving non-200 response to INVITE, sending/receiving - * CANCEL to initial INVITE, and sending/receiving BYE. - * - * @param dlg The dialog. - * @param event The event. - * @see pjsip_event - */ - void (*on_disconnected)(pjsip_dlg *dlg, pjsip_event *event); - - /** - * This callback is called when the dialog is about to be destroyed. - * @param dlg The dialog. - */ - void (*on_terminated)(pjsip_dlg *dlg); - - /** - * This callback will be called when the dialog receives mid call events - * such as re-invitation or incoming pager. - * - * @param dlg The dialog. - * @param event The event. - */ - void (*on_mid_call_events)(pjsip_dlg *dlg, pjsip_event *event); - -}; /* struct pjsip_dlg_callback */ - - - -/** - * Dialog state. - */ -typedef enum pjsip_dlg_state_e -{ - /** - * State NULL is after the dialog is instantiated but before any - * initialization is done. - */ - PJSIP_DIALOG_STATE_NULL, - - /** - * State INCOMING is after the (callee) dialog has been initialized with - * the incoming request, but before any responses is sent by the dialog. - */ - PJSIP_DIALOG_STATE_INCOMING, - - /** - * State CALLING is after the (caller) dialog has sent outgoing invitation - * but before any responses are received. - */ - PJSIP_DIALOG_STATE_CALLING, - - /** - * State PROCEEDING is after the dialog sent/received provisional - * responses, but before final response is sent/received. - */ - PJSIP_DIALOG_STATE_PROCEEDING, - - /** - * State CONNECTING is after the dialog has sent/received final response - * to the invitation, but before acknowledgement is sent. - */ - PJSIP_DIALOG_STATE_CONNECTING, - - /** - * State ESTABLISHED occurs after the invitation has been accepted and - * acknowledged. - */ - PJSIP_DIALOG_STATE_ESTABLISHED, - - /** - * State DISCONNECTED occurs after either party successfully disconnect - * the session. - */ - PJSIP_DIALOG_STATE_DISCONNECTED, - - /** - * State TERMINATE occurs when the dialog is ready to be destroyed. - */ - PJSIP_DIALOG_STATE_TERMINATED, - -} pjsip_dlg_state_e; - - -/** - * Get the dialog string state. - * - * @param state Dialog state. - * @return The string describing the state. - */ -const char *pjsip_dlg_state_str(pjsip_dlg_state_e state); - -/** - * This structure is used to describe dialog's participants, which in this - * case is local party (i.e. us) and remote party. - */ -typedef struct pjsip_dlg_party -{ - pjsip_uri *target; /**< Target URL. */ - pjsip_fromto_hdr *info; /**< URL in From/To header. */ - pj_str_t tag; /**< Tag. */ - pjsip_contact_hdr *contact; /**< URL in Contact. */ - pj_sockaddr_in addr; /**< The current transport address. */ - int cseq; /**< Sequence number counter. */ -} pjsip_dlg_party; - - -/** - * This structure describes the dialog structure. - */ -struct pjsip_dlg -{ - PJ_DECL_LIST_MEMBER(struct pjsip_dlg) - - char obj_name[PJ_MAX_OBJ_NAME]; /**< Log identification. */ - - pjsip_user_agent *ua; /**< User agent instance. */ - pj_pool_t *pool; /**< Dialog's pool. */ - pjsip_dlg_state_e state; /**< Dialog's call state. */ - pjsip_role_e role; /**< Dialog's role. */ - pj_mutex_t *mutex; /**< Dialog's mutex. */ - - pjsip_dlg_party local; /**< Local party info. */ - pjsip_dlg_party remote; /**< Remote party info. */ - - pjsip_cid_hdr *call_id; /**< Call-ID */ - pj_bool_t secure; /**< Use secure transport? */ - - pjsip_route_hdr route_set; /**< Dialog's route set. */ - pjsip_transaction *invite_tsx; /**< Current INVITE transaction. */ - int pending_tsx_count; /**< Total pending tsx count. */ - - int cred_count; /**< Number of credentials. */ - pjsip_cred_info *cred_info; /**< Array of credentials. */ - - pjsip_auth_session auth_sess; /**< List of auth session. */ - - pjsip_msg_body *body; - - void *user_data; /**< Application's data. */ - - int (*handle_tsx_event)(struct pjsip_dlg *, /**< Internal state handler.*/ - pjsip_transaction *, - pjsip_event *); -}; - - -/** - * Initialize dialog with local and remote info. This function is normally - * called after application creates the dialog with #pjsip_ua_create_dialog - * for UAC dialogs. - * - * This function will initialize local and remote info from the URL, generate - * a globally unique Call-ID, initialize CSeq, and initialize other dialog's - * internal attributes. - * - * @param dlg The dialog to initialize. - * @param local_info URI/name address to be used as local info - * (From and Contact headers). - * @param remote_info URI/name address to be used as remote info (To header). - * @param target URI for initial remote's target, or NULL to set the - * initial target the same as remote_info. - * - * @return zero on success. - */ -PJ_DECL(pj_status_t) pjsip_dlg_init( pjsip_dlg *dlg, - const pj_str_t *local_info, - const pj_str_t *remote_info, - const pj_str_t *target); - - -/** - * Set authentication credentials to be used by this dialog. - * - * If authentication credentials are set for the dialog, the dialog will try to - * perform authentication automatically using the credentials supplied, and - * also cache the last Authorization or Proxy-Authorization headers for next - * requests. - * - * If none of the credentials are suitable or accepted by remote, then - * the dialog will just pass the authorization failure response back to - * application. - * - * @param dlg The dialog. - * @param count Number of credentials in the array. - * @param cred Array of credentials. - * - * @return Zero on success. - */ -PJ_DECL(pj_status_t) pjsip_dlg_set_credentials( pjsip_dlg *dlg, - int count, - const pjsip_cred_info cred[]); - -/** - * Override local contact details. - * - * Call this function to change the contact details to be advertised in Contact - * header. Application normally need to call this function for incoming calls - * before answering the call with 200/OK, because for an incoming dialogs, the - * initial local contact info are generated from the To header, which is - * normally not the appropriate one. - * - * @param dlg The dialog. - * @param contact The contact to use. - * - * @return Zero on success. - */ -PJ_DECL(pj_status_t) pjsip_dlg_set_contact( pjsip_dlg *dlg, - const pj_str_t *contact ); - - -/** - * Set initial route set to be used by the dialog. This initial route set - * governs where and how the initial INVITE request will be routed. This - * initial route set will be overwritten with the route set found in the - * 2xx response of INVITE. - * - * Application only needs to call this function if it wants to have custom - * route for individual dialogs. If only a single route for all dialogs is - * needed, then application can set the global route by calling function - * #pjsip_endpt_set_proxies(). - * - * @param dlg The dialog. - * @param route_set The route set list. - * - * @return Zero on success. - */ -PJ_DECL(pj_status_t) pjsip_dlg_set_route_set( pjsip_dlg *dlg, - const pjsip_route_hdr *route_set ); - - -/** - * Variation of #pjsip_dlg_set_route_set where the headers will be used - * as it is (i.e. without cloned). - * - * @param dlg The dialog. - * @param route_set The route set list. - * - * @return Zero on success. - */ -PJ_DECL(pj_status_t) pjsip_dlg_set_route_set_np( pjsip_dlg *dlg, - pjsip_route_hdr *route_set); - -/** - * Create initial outgoing INVITE message. - * - * This function is just a simple wrapper to #pjsip_dlg_create_request(), - * so it follows the same rule there. In addition, this function also adds - * \b Allow header to the outgoing request. - * - * After the message is successfully created, application must call - * #pjsip_dlg_send_msg() to actually send the message and update the dialog's - * state. Note that upon return the reference counter of the transmit data - * will be set to one. - * - * @param dlg The dialog. - * - * @return The dialog transmit data, or NULL. - */ -PJ_DECL(pjsip_tx_data*) pjsip_dlg_invite( pjsip_dlg *dlg ); - - -/** - * Answer incoming dialog invitation, with either provisional responses - * or a final response. Application can only call this function when there's - * a pending invitation to be answered. - * - * After the message is successfully created, application must call - * #pjsip_dlg_send_msg() to actually send the message and update the dialog's - * state. Note that upon return the reference counter of the transmit data - * will be set to one. - * - * @param dlg The dialog. - * @param code The response code, which can be: - * - 100-199 Provisional response (application can issue multiple - * provisional responses). - * - 200-299 To answer the invitation (normally status code 200 - * is sent). - * - 300-699 To reject the invitation. - * @return Transmit data if successfull. - */ -PJ_DECL(pjsip_tx_data*) pjsip_dlg_answer( pjsip_dlg *dlg, int code ); - - -/** - * High level function to create message to disconnect dialog. Depending - * on dialog's state, this function will either create CANCEL, final response, - * or BYE message. A status code must be supplied, which will be set if dialog - * will be transmitting a final response to INVITE. - * - * After the message is successfully created, application must call - * #pjsip_dlg_send_msg to actually send the message and update the dialog's - * state. Note that upon return the reference counter of the transmit data - * will be set to one. - * - * @param dlg The dialog. - * @param status_code The status code for disconnection. - * @return Transmit data if successfull. - */ -PJ_DECL(pjsip_tx_data*) pjsip_dlg_disconnect( pjsip_dlg *dlg, int status_code); - -/** - * Create CANCEL message to cancel pending outgoing dialog invitation. - * Normally application should call #pjsip_dlg_disconnect() instead, because - * that function will create the correct message regardless of the state of - * the dialog. - * - * Application can call this function at anytime after it issues outgoing - * invitation and before receiving final response. However, there's no - * guarantee that the invitation will be successfully cancelled, since the - * CANCEL request and the final response can pass over in the wire. So the - * application must prepare to have the dialog connected even after the - * dialog is cancelled. - * - * The final state of the dialog will be reported in the dialog callback. - * If the CANCEL request succeeded, then the dialog will be disconnected with - * status code \a PJSIP_SC_REQUEST_TERMINATED. - * - * After the message is successfully created, application must call - * #pjsip_dlg_send_msg() to actually send the message and update the dialog's - * state. - * - * Upon return of this function, the reference counter of the transmit data - * will be set to one. - * - * @param dlg The dialog. - * @return The dialog transmit data containing the CANCEL message, - * or NULL. - */ -PJ_DECL(pjsip_tx_data*) pjsip_dlg_cancel( pjsip_dlg *dlg ); - - -/** - * Create BYE message. Application shouldn't normally need to use this function, - * but rather it's preferable to use #pjsip_dlg_disconnect() instead because - * that function will work to disconnect the session no matter what the state - * is. - * - * After the message is successfully created, application must call - * #pjsip_dlg_send_msg() to actually send the message and update the dialog's - * state. Note that upon return the reference counter of the transmit data - * will be set to one. - * - * @param dlg The dialog. - * @return The BYE message or NULL. - */ -PJ_DECL(pjsip_tx_data*) pjsip_dlg_bye( pjsip_dlg *dlg ); - -/** - * This function is called by application to create new outgoing request - * message for this dialog. After the request is created, application can - * modify the message (such adding headers), and eventually send the request - * by calling #pjsip_dlg_send_msg(). - * - * This function will initialize the request message with dialog's properties - * as follows: - * - the request line is initialized with the method and the target is - * initialized from current remote target. - * - \b From, \b To, \b Contact, and \b Call-Id headers will be added. - * - An initial \b CSeq header will be provided (although the value will be - * verified again when the message is actually sent with #pjsip_dlg_send_msg(). - * - \b Route headers will be added from dialog's route set. - * - Authentication headers (\b Authorization or \b Proxy-Authorization) will - * be added from dialog's authorization cache. - * - * Note that upon return the reference counter of the transmit data - * will be set to one. When the message is sent, #pjsip_dlg_send_msg() will - * decrement the reference counter, and when the reference counter reach zero, - * the message will be deleted. - * - * @param dlg The dialog. - * @param method The request method. - * @param cseq Specify CSeq, or -1 to let the dialog specify CSeq. - * - * @return Transmit data for the new request. - * - * @see pjsip_dlg_send_msg() - */ -PJ_DECL(pjsip_tx_data*) pjsip_dlg_create_request( pjsip_dlg *dlg, - const pjsip_method *method, - int cseq); - - -/** - * This function can be called by application to send outgoing message (request - * or response) to remote party. Note that after calling this function, the - * transmit data will be deleted regardless of the return status. To prevent - * deletion, application must increase the reference count, but then it will - * be responsible to delete this transmit data itself (by decreasing the - * reference count). - * - * @param dlg The dialog. - * @param tdata The transmit data, which contains the request message. - * @return zero on success. - */ -PJ_DECL(pj_status_t) pjsip_dlg_send_msg( pjsip_dlg *dlg, - pjsip_tx_data *tdata ); - - -/** - * @} - */ - -PJ_END_DECL - -#endif /* __PJSIP_DIALOG_H__ */ - |