From 0d61adeb5f784b45f76d76dad9974f4111fb3c8c Mon Sep 17 00:00:00 2001 From: Benny Prijono Date: Mon, 30 Jan 2006 18:40:05 +0000 Subject: Finished implementation of UA layer (to be tested) git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@127 74dad513-b988-da41-8d7b-12977e46ad98 --- pjsip/src/pjsip-ua/sip_dialog.c | 1802 --------------------------------------- 1 file changed, 1802 deletions(-) delete mode 100644 pjsip/src/pjsip-ua/sip_dialog.c (limited to 'pjsip/src/pjsip-ua/sip_dialog.c') diff --git a/pjsip/src/pjsip-ua/sip_dialog.c b/pjsip/src/pjsip-ua/sip_dialog.c deleted file mode 100644 index 722c06d8..00000000 --- a/pjsip/src/pjsip-ua/sip_dialog.c +++ /dev/null @@ -1,1802 +0,0 @@ -/* $Id$ */ -/* - * Copyright (C) 2003-2006 Benny Prijono - * - * 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 - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/* TLS to keep dialog lock record (initialized by UA) */ -int pjsip_dlg_lock_tls_id; - -struct dialog_lock_data -{ - struct dialog_lock_data *prev; - pjsip_dlg *dlg; - int is_alive; -}; - -/* - * Static function prototypes. - */ -static void dlg_create_request_throw( pjsip_tx_data **p_tdata, - pjsip_dlg *dlg, - const pjsip_method *method, - int cseq ); -static int dlg_on_all_state_pre( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event); -static int dlg_on_all_state_post( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event); -static int dlg_on_state_null( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event); -static int dlg_on_state_incoming( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event); -static int dlg_on_state_calling( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event); -static int dlg_on_state_proceeding( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event); -static int dlg_on_state_proceeding_caller( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event); -static int dlg_on_state_proceeding_callee( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event); -static int dlg_on_state_connecting( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event); -static int dlg_on_state_established( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event); -static int dlg_on_state_disconnected( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event); -static int dlg_on_state_terminated( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event); - -/* - * Dialog state handlers. - */ -static int (*dlg_state_handlers[])(struct pjsip_dlg *, pjsip_transaction *, - pjsip_event *) = -{ - &dlg_on_state_null, - &dlg_on_state_incoming, - &dlg_on_state_calling, - &dlg_on_state_proceeding, - &dlg_on_state_connecting, - &dlg_on_state_established, - &dlg_on_state_disconnected, - &dlg_on_state_terminated, -}; - -/* - * Dialog state names. - */ -static const char* dlg_state_names[] = -{ - "STATE_NULL", - "STATE_INCOMING", - "STATE_CALLING", - "STATE_PROCEEDING", - "STATE_CONNECTING", - "STATE_ESTABLISHED", - "STATE_DISCONNECTED", - "STATE_TERMINATED", -}; - - -/* - * Get the dialog string state, normally for logging purpose. - */ -const char *pjsip_dlg_state_str(pjsip_dlg_state_e state) -{ - return dlg_state_names[state]; -} - -/* Lock dialog mutex. */ -static void lock_dialog(pjsip_dlg *dlg, struct dialog_lock_data *lck) -{ - struct dialog_lock_data *prev; - - pj_mutex_lock(dlg->mutex); - prev = pj_thread_local_get(pjsip_dlg_lock_tls_id); - lck->prev = prev; - lck->dlg = dlg; - lck->is_alive = 1; - pj_thread_local_set(pjsip_dlg_lock_tls_id, lck); -} - -/* Carefully unlock dialog mutex, protect against situation when the dialog - * has already been destroyed. - */ -static pj_status_t unlock_dialog(pjsip_dlg *dlg, struct dialog_lock_data *lck) -{ - pj_assert(pj_thread_local_get(pjsip_dlg_lock_tls_id) == lck); - pj_assert(dlg == lck->dlg); - - pj_thread_local_set(pjsip_dlg_lock_tls_id, lck->prev); - if (lck->is_alive) - pj_mutex_unlock(dlg->mutex); - - return lck->is_alive ? 0 : -1; -} - -/* - * This is called by dialog's FSM to change dialog's state. - */ -static void dlg_set_state( pjsip_dlg *dlg, pjsip_dlg_state_e state, - pjsip_event *event) -{ - PJ_UNUSED_ARG(event); - - PJ_LOG(4, (dlg->obj_name, "State %s-->%s (ev=%s, src=%s, data=%p)", - pjsip_dlg_state_str(dlg->state), pjsip_dlg_state_str(state), - event ? pjsip_event_str(event->type) : "", - event ? pjsip_event_str(event->src_type) : "", - event ? event->src.data : NULL)); - - dlg->state = state; - dlg->handle_tsx_event = dlg_state_handlers[state]; -} - -/* - * Invoke dialog's callback. - * This function is called by dialog's FSM, and interpret the event and call - * the corresponding callback registered by application. - */ -static void dlg_call_dlg_callback( pjsip_dlg *dlg, pjsip_dlg_event_e dlg_event, - pjsip_event *event ) -{ - pjsip_dlg_callback *cb = dlg->ua->dlg_cb; - if (!cb) { - PJ_LOG(4,(dlg->obj_name, "Can not call callback (none registered).")); - return; - } - - /* Low level event: call the all-events callback. */ - if (cb->on_all_events) { - (*cb->on_all_events)(dlg, dlg_event, event); - } - - /* Low level event: call the tx/rx callback if this is a tx/rx event. */ - if (event->type == PJSIP_EVENT_BEFORE_TX && cb->on_before_tx) - { - (*cb->on_before_tx)(dlg, event->obj.tsx, event->src.tdata, event->data.long_data); - } - else if (event->type == PJSIP_EVENT_TX_MSG && - event->src_type == PJSIP_EVENT_TX_MSG && cb->on_tx_msg) - { - (*cb->on_tx_msg)(dlg, event->obj.tsx, event->src.tdata); - } - else if (event->type == PJSIP_EVENT_RX_MSG && - event->src_type == PJSIP_EVENT_RX_MSG && cb->on_rx_msg) { - (*cb->on_rx_msg)(dlg, event->obj.tsx, event->src.rdata); - } - - /* Now trigger high level events. - * High level event should only occurs when dialog's state has changed, - * except for on_provisional, which may be called multiple times whenever - * response message is sent - */ - if (dlg->state == PJSIP_DIALOG_STATE_PROCEEDING && - (event->type== PJSIP_EVENT_TSX_STATE_CHANGED) && - event->obj.tsx == dlg->invite_tsx) - { - /* Sent/received provisional responses. */ - if (cb->on_provisional) - (*cb->on_provisional)(dlg, event->obj.tsx, event); - } - - if (dlg_event == PJSIP_DIALOG_EVENT_MID_CALL_REQUEST) { - if (cb->on_mid_call_events) - (*cb->on_mid_call_events)(dlg, event); - return; - } - - if (dlg_event != PJSIP_DIALOG_EVENT_STATE_CHANGED) - return; - - if (dlg->state == PJSIP_DIALOG_STATE_INCOMING) { - - /* New incoming dialog. */ - pj_assert (event->src_type == PJSIP_EVENT_RX_MSG); - (*cb->on_incoming)(dlg, event->obj.tsx, event->src.rdata); - - } else if (dlg->state == PJSIP_DIALOG_STATE_CALLING) { - - /* Dialog has just sent the first INVITE. */ - if (cb->on_calling) { - (*cb->on_calling)(dlg, event->obj.tsx, event->src.tdata); - } - - } else if (dlg->state == PJSIP_DIALOG_STATE_DISCONNECTED) { - - if (cb->on_disconnected) - (*cb->on_disconnected)(dlg, event); - - } else if (dlg->state == PJSIP_DIALOG_STATE_TERMINATED) { - - if (cb->on_terminated) - (*cb->on_terminated)(dlg); - - pjsip_ua_destroy_dialog(dlg); - - } else if (dlg->state == PJSIP_DIALOG_STATE_CONNECTING) { - - if (cb->on_connecting) - (*cb->on_connecting)(dlg, event); - - } else if (dlg->state == PJSIP_DIALOG_STATE_ESTABLISHED) { - - if (cb->on_established) - (*cb->on_established)(dlg, event); - } -} - -/* - * This callback receives event from the transaction layer (via User Agent), - * or from dialog timer (for 200/INVITE or ACK retransmission). - */ -void pjsip_dlg_on_tsx_event( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - int status = 0; - struct dialog_lock_data lck; - - PJ_LOG(4, (dlg->obj_name, "state=%s (evt=%s, src=%s)", - pjsip_dlg_state_str(dlg->state), - pjsip_event_str(event->type), - pjsip_event_str(event->src_type))); - - - lock_dialog(dlg, &lck); - - status = dlg_on_all_state_pre( dlg, tsx, event); - - if (status==0) { - status = (*dlg->handle_tsx_event)(dlg, tsx, event); - } - if (status==0) { - status = dlg_on_all_state_post( dlg, tsx, event); - } - - unlock_dialog(dlg, &lck); -} - -/* - * This function contains common processing in all states, and it is called - * before the FSM is invoked. - */ -static int dlg_on_all_state_pre( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - PJ_UNUSED_ARG(event) - - if (event->type != PJSIP_EVENT_TSX_STATE_CHANGED) - return 0; - - if (tsx && (tsx->state==PJSIP_TSX_STATE_CALLING || - tsx->state==PJSIP_TSX_STATE_TRYING)) - { - ++dlg->pending_tsx_count; - - } else if (tsx && tsx->state==PJSIP_TSX_STATE_DESTROYED) - { - --dlg->pending_tsx_count; - if (tsx == dlg->invite_tsx) - dlg->invite_tsx = NULL; - } - - if (tsx->method.id == PJSIP_INVITE_METHOD) { - tsx->handle_ack = 1; - } - return 0; -} - - -/* - * This function contains common processing in all states, and it is called - * after the FSM is invoked. - */ -static int dlg_on_all_state_post( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - PJ_UNUSED_ARG(event) - - if (tsx && tsx->state==PJSIP_TSX_STATE_DESTROYED) { - if (dlg->pending_tsx_count == 0 && - dlg->state != PJSIP_DIALOG_STATE_CONNECTING && - dlg->state != PJSIP_DIALOG_STATE_ESTABLISHED && - dlg->state != PJSIP_DIALOG_STATE_TERMINATED) - { - dlg_set_state(dlg, PJSIP_DIALOG_STATE_TERMINATED, event); - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - return -1; - } - } - - return 0; -} - - -/* - * Internal function to initialize dialog, contains common initialization - * for both UAS and UAC dialog. - */ -static pj_status_t dlg_init( pjsip_dlg *dlg ) -{ - /* Init mutex. */ - dlg->mutex = pj_mutex_create(dlg->pool, "mdlg%p", 0); - if (!dlg->mutex) { - PJ_PERROR((dlg->obj_name, "pj_mutex_create()")); - return -1; - } - - /* Init route-set (Initially empty) */ - pj_list_init(&dlg->route_set); - - /* Init auth credential list. */ - pj_list_init(&dlg->auth_sess); - - return PJ_SUCCESS; -} - -/* - * This one is called just before dialog is destroyed. - * It is called while mutex is held. - */ -PJ_DEF(void) pjsip_on_dialog_destroyed( pjsip_dlg *dlg ) -{ - struct dialog_lock_data *lck; - - //PJ_TODO(CHECK_THIS); - pj_assert(dlg->pending_tsx_count == 0); - - /* Mark dialog as dead. */ - lck = pj_thread_local_get(pjsip_dlg_lock_tls_id); - while (lck) { - if (lck->dlg == dlg) - lck->is_alive = 0; - lck = lck->prev; - } -} - -/* - * Initialize dialog from the received request. - * This is an internal function which is called by the User Agent (sip_ua.c), - * and it will initialize most of dialog's properties with values from the - * received message. - */ -pj_status_t pjsip_dlg_init_from_rdata( pjsip_dlg *dlg, pjsip_rx_data *rdata ) -{ - pjsip_msg *msg = rdata->msg; - pjsip_to_hdr *to; - pjsip_contact_hdr *contact; - pjsip_name_addr *name_addr; - pjsip_sip_uri *url; - unsigned flag; - pjsip_event event; - - pj_assert(dlg && rdata); - - PJ_LOG(5, (dlg->obj_name, "init_from_rdata(%p)", rdata)); - - /* Must be an INVITE request. */ - pj_assert(msg->type == PJSIP_REQUEST_MSG && - msg->line.req.method.id == PJSIP_INVITE_METHOD); - - /* Init general dialog data. */ - if (dlg_init(dlg) != PJ_SUCCESS) { - return -1; - } - - /* Get the To header. */ - to = rdata->to; - - /* Copy URI in the To header as our local URI. */ - dlg->local.info = pjsip_hdr_clone( dlg->pool, to); - - /* Set tag in the local info. */ - dlg->local.info->tag = dlg->local.tag; - - /* Create local Contact to be advertised in the response. - * At the moment, just copy URI from the local URI as our contact. - */ - dlg->local.contact = pjsip_contact_hdr_create( dlg->pool ); - dlg->local.contact->star = 0; - name_addr = (pjsip_name_addr *)dlg->local.info->uri; - dlg->local.contact->uri = (pjsip_uri*) name_addr; - url = (pjsip_sip_uri*) name_addr->uri; - //url->port = rdata->via->sent_by.port; - //url->port = pj_sockaddr_get_port( pjsip_transport_get_local_addr(rdata->transport) ); - - /* Save remote URI. */ - dlg->remote.info = pjsip_hdr_clone( dlg->pool, rdata->from ); - pjsip_fromto_set_to( dlg->remote.info ); - pj_strdup( dlg->pool, &dlg->remote.tag, &rdata->from->tag ); - - /* Save remote Contact. */ - contact = pjsip_msg_find_hdr( msg, PJSIP_H_CONTACT, NULL); - if (contact) { - dlg->remote.contact = pjsip_hdr_clone( dlg->pool, contact ); - } else { - PJ_LOG(3,(dlg->obj_name, "No Contact header in INVITE from %s", - pj_sockaddr_get_str_addr(&rdata->addr))); - dlg->remote.contact = pjsip_contact_hdr_create( dlg->pool ); - dlg->remote.contact->uri = dlg->remote.info->uri; - } - - /* Save Call-ID. */ - dlg->call_id = pjsip_cid_hdr_create(dlg->pool); - pj_strdup( dlg->pool, &dlg->call_id->id, &rdata->call_id ); - - /* Initialize local CSeq and save remote CSeq.*/ - dlg->local.cseq = rdata->timestamp.sec & 0xFFFF; - dlg->remote.cseq = rdata->cseq->cseq; - - /* Secure? */ - flag = pjsip_transport_get_flag(rdata->transport); - dlg->secure = (flag & PJSIP_TRANSPORT_SECURE) != 0; - - /* Initial state is NULL. */ - event.type = event.src_type = PJSIP_EVENT_RX_MSG; - event.src.rdata = rdata; - dlg_set_state(dlg, PJSIP_DIALOG_STATE_NULL, &event); - - PJ_LOG(5, (dlg->obj_name, "init_from_rdata(%p) complete", rdata)); - return PJ_SUCCESS; -} - -/* - * Set the contact details. - */ -PJ_DEF(pj_status_t) pjsip_dlg_set_contact( pjsip_dlg *dlg, - const pj_str_t *contact ) -{ - pjsip_uri *local_uri; - pj_str_t tmp; - - pj_strdup_with_null(dlg->pool, &tmp, contact); - local_uri = pjsip_parse_uri( dlg->pool, tmp.ptr, tmp.slen, - PJSIP_PARSE_URI_AS_NAMEADDR); - if (local_uri == NULL) { - PJ_LOG(2, (dlg->obj_name, "set_contact: invalid URI")); - return -1; - } - - dlg->local.contact->star = 0; - dlg->local.contact->uri = local_uri; - return 0; -} - -/* - * Set route set. - */ -PJ_DEF(pj_status_t) pjsip_dlg_set_route_set( pjsip_dlg *dlg, - const pjsip_route_hdr *route_set ) -{ - pjsip_route_hdr *hdr; - - pj_list_init(&dlg->route_set); - hdr = route_set->next; - while (hdr != route_set) { - pjsip_route_hdr *cloned = pjsip_hdr_clone(dlg->pool, hdr); - pj_list_insert_before( &dlg->route_set, cloned); - hdr = hdr->next; - } - return 0; -} - -/* - * Set route set without cloning the header. - */ -PJ_DEF(pj_status_t) pjsip_dlg_set_route_set_np( pjsip_dlg *dlg, - pjsip_route_hdr *route_set) -{ - pjsip_route_hdr *hdr; - - pj_list_init(&dlg->route_set); - hdr = route_set->next; - while (hdr != route_set) { - pj_list_insert_before( &dlg->route_set, hdr); - hdr = hdr->next; - } - return 0; -} - -/* - * Application calls this function when it wants to initiate an outgoing - * dialog (incoming dialogs are created automatically by UA when it receives - * INVITE, by calling pjsip_dlg_init_from_rdata()). - * This function should initialize most of the dialog's properties. - */ -PJ_DEF(pj_status_t) pjsip_dlg_init( pjsip_dlg *dlg, - const pj_str_t *c_local_info, - const pj_str_t *c_remote_info, - const pj_str_t *c_target) -{ - pj_time_val tv; - pjsip_event event; - pj_str_t buf; - - if (!dlg || !c_local_info || !c_remote_info) { - pj_assert(dlg && c_local_info && c_remote_info); - return -1; - } - - PJ_LOG(5, (dlg->obj_name, "initializing")); - - /* Init general dialog */ - if (dlg_init(dlg) != PJ_SUCCESS) { - return -1; - } - - /* Duplicate local info. */ - pj_strdup_with_null( dlg->pool, &buf, c_local_info); - - /* Build local URI. */ - dlg->local.target = pjsip_parse_uri(dlg->pool, buf.ptr, buf.slen, - PJSIP_PARSE_URI_AS_NAMEADDR); - if (dlg->local.target == NULL) { - PJ_LOG(2, (dlg->obj_name, - "pjsip_dlg_init: invalid local URI %s", buf.ptr)); - return -1; - } - - /* Set local URI. */ - dlg->local.info = pjsip_from_hdr_create(dlg->pool); - dlg->local.info->uri = dlg->local.target; - dlg->local.info->tag = dlg->local.tag; - - /* Create local Contact to be advertised in the response. */ - dlg->local.contact = pjsip_contact_hdr_create( dlg->pool ); - dlg->local.contact->star = 0; - dlg->local.contact->uri = dlg->local.target; - - /* Set remote URI. */ - dlg->remote.info = pjsip_to_hdr_create(dlg->pool); - - /* Duplicate to buffer. */ - pj_strdup_with_null( dlg->pool, &buf, c_remote_info); - - /* Build remote info. */ - dlg->remote.info->uri = pjsip_parse_uri( dlg->pool, buf.ptr, buf.slen, - PJSIP_PARSE_URI_AS_NAMEADDR); - if (dlg->remote.info->uri == NULL) { - PJ_LOG(2, (dlg->obj_name, - "pjsip_dlg_init: invalid remote URI %s", buf.ptr)); - return -1; - } - - /* Set remote Contact initially equal to the remote URI. */ - dlg->remote.contact = pjsip_contact_hdr_create(dlg->pool); - dlg->remote.contact->star = 0; - dlg->remote.contact->uri = dlg->remote.info->uri; - - /* Set initial remote target. */ - if (c_target != NULL) { - pj_strdup_with_null( dlg->pool, &buf, c_target); - dlg->remote.target = pjsip_parse_uri( dlg->pool, buf.ptr, buf.slen, 0); - if (dlg->remote.target == NULL) { - PJ_LOG(2, (dlg->obj_name, - "pjsip_dlg_init: invalid remote target %s", buf.ptr)); - return -1; - } - } else { - dlg->remote.target = dlg->remote.info->uri; - } - - /* Create globally unique Call-ID */ - dlg->call_id = pjsip_cid_hdr_create(dlg->pool); - pj_create_unique_string( dlg->pool, &dlg->call_id->id ); - - /* Local and remote CSeq */ - pj_gettimeofday(&tv); - dlg->local.cseq = tv.sec & 0xFFFF; - dlg->remote.cseq = 0; - - /* Initial state is NULL. */ - event.type = event.src_type = PJSIP_EVENT_TX_MSG; - event.src.data = NULL; - dlg_set_state(dlg, PJSIP_DIALOG_STATE_NULL, &event); - - /* Done. */ - PJ_LOG(4, (dlg->obj_name, "%s dialog initialized, From: %.*s, To: %.*s", - pjsip_role_name(dlg->role), - c_local_info->slen, c_local_info->ptr, - c_remote_info->slen, c_remote_info->ptr)); - - return PJ_SUCCESS; -} - -/* - * Set credentials. - */ -PJ_DEF(pj_status_t) pjsip_dlg_set_credentials( pjsip_dlg *dlg, - int count, - const pjsip_cred_info *cred) -{ - if (count > 0) { - dlg->cred_info = pj_pool_alloc(dlg->pool, count * sizeof(pjsip_cred_info)); - pj_memcpy(dlg->cred_info, cred, count * sizeof(pjsip_cred_info)); - } - dlg->cred_count = count; - return 0; -} - -/* - * Create a new request within dialog (i.e. after the dialog session has been - * established). The construction of such requests follows the rule in - * RFC3261 section 12.2.1. - */ -static void dlg_create_request_throw( pjsip_tx_data **p_tdata, - pjsip_dlg *dlg, - const pjsip_method *method, - int cseq ) -{ - pjsip_tx_data *tdata; - pjsip_contact_hdr *contact; - pjsip_route_hdr *route, *end_list; - - /* Contact Header field. - * Contact can only be present in requests that establish dialog (in the - * core SIP spec, only INVITE). - */ - if (method->id == PJSIP_INVITE_METHOD) - contact = dlg->local.contact; - else - contact = NULL; - - tdata = pjsip_endpt_create_request_from_hdr( dlg->ua->endpt, - method, - dlg->remote.target, - dlg->local.info, - dlg->remote.info, - contact, - dlg->call_id, - cseq, - NULL); - if (!tdata) { - PJ_THROW(1); - return; - } - - /* Just copy dialog route-set to Route header. - * The transaction will do the processing as specified in Section 12.2.1 - * of RFC 3261 in function tsx_process_route() in sip_transaction.c. - */ - route = dlg->route_set.next; - end_list = &dlg->route_set; - for (; route != end_list; route = route->next ) { - pjsip_route_hdr *r; - r = pjsip_hdr_shallow_clone( tdata->pool, route ); - pjsip_routing_hdr_set_route(r); - pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)r); - } - - /* Copy authorization headers. */ - pjsip_auth_init_req( dlg->pool, tdata, &dlg->auth_sess, - dlg->cred_count, dlg->cred_info); - - *p_tdata = tdata; -} - - -/* - * 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. - */ -PJ_DEF(pjsip_tx_data*) pjsip_dlg_create_request( pjsip_dlg *dlg, - const pjsip_method *method, - int cseq) -{ - PJ_USE_EXCEPTION; - struct dialog_lock_data lck; - pjsip_tx_data *tdata = NULL; - - pj_assert(dlg != NULL && method != NULL); - if (!dlg || !method) { - return NULL; - } - - PJ_LOG(5, (dlg->obj_name, "Creating request")); - - /* Lock dialog. */ - lock_dialog(dlg, &lck); - - /* Use outgoing CSeq and increment it by one. */ - if (cseq < 0) - cseq = dlg->local.cseq + 1; - - PJ_LOG(5, (dlg->obj_name, "creating request %.*s cseq=%d", - method->name.slen, method->name.ptr, cseq)); - - /* Create the request. */ - PJ_TRY { - dlg_create_request_throw(&tdata, dlg, method, cseq); - PJ_LOG(5, (dlg->obj_name, "request data %s created", tdata->obj_name)); - } - PJ_CATCH_ANY { - /* Failed! Delete transmit data. */ - if (tdata) { - pjsip_tx_data_dec_ref( tdata ); - tdata = NULL; - } - } - PJ_END; - - /* Unlock dialog. */ - unlock_dialog(dlg, &lck); - - return tdata; -} - -/* - * Sends request. - * Select the transport for the request message - */ -static pj_status_t dlg_send_request( pjsip_dlg *dlg, pjsip_tx_data *tdata ) -{ - pjsip_transaction *tsx; - pj_status_t status = PJ_SUCCESS; - struct dialog_lock_data lck; - - pj_assert(dlg != NULL && tdata != NULL); - if (!dlg || !tdata) { - return -1; - } - - PJ_LOG(5, (dlg->obj_name, "sending request %s", tdata->obj_name)); - - /* Lock dialog. */ - lock_dialog(dlg, &lck); - - /* Create a new transaction. */ - tsx = pjsip_endpt_create_tsx( dlg->ua->endpt ); - if (!tsx) { - unlock_dialog(dlg, &lck); - return -1; - } - - PJ_LOG(4, (dlg->obj_name, "Created new UAC transaction: %s", tsx->obj_name)); - - /* Initialize transaction */ - tsx->module_data[dlg->ua->mod_id] = dlg; - status = pjsip_tsx_init_uac( tsx, tdata ); - if (status != PJ_SUCCESS) { - unlock_dialog(dlg, &lck); - pjsip_endpt_destroy_tsx( dlg->ua->endpt, tsx ); - return -1; - } - pjsip_endpt_register_tsx( dlg->ua->endpt, tsx ); - - /* Start the transaction. */ - pjsip_tsx_on_tx_msg(tsx, tdata); - - /* Unlock dialog. */ - unlock_dialog(dlg, &lck); - - return status; -} - -/* - * This function can be called by application to send ANY outgoing message - * to remote party. - */ -PJ_DEF(pj_status_t) pjsip_dlg_send_msg( pjsip_dlg *dlg, pjsip_tx_data *tdata ) -{ - pj_status_t status; - int tsx_status; - struct dialog_lock_data lck; - - pj_assert(dlg != NULL && tdata != NULL); - if (!dlg || !tdata) { - return -1; - } - - lock_dialog(dlg, &lck); - - if (tdata->msg->type == PJSIP_REQUEST_MSG) { - int request_cseq; - pjsip_msg *msg = tdata->msg; - pjsip_cseq_hdr *cseq_hdr; - - switch (msg->line.req.method.id) { - case PJSIP_CANCEL_METHOD: - - /* Check the INVITE transaction state. */ - tsx_status = dlg->invite_tsx->status_code; - if (tsx_status >= 200) { - /* Already terminated. Can't cancel. */ - status = -1; - goto on_return; - } - - /* If we've got provisional response, then send CANCEL and wait for - * the response to INVITE to arrive. Otherwise just send CANCEL and - * terminate the INVITE. - */ - if (tsx_status < 100) { - pjsip_tsx_terminate( dlg->invite_tsx, - PJSIP_SC_REQUEST_TERMINATED); - status = 0; - goto on_return; - } - - status = 0; - request_cseq = dlg->invite_tsx->cseq; - break; - - case PJSIP_ACK_METHOD: - /* Sending ACK outside of transaction is not supported at present! */ - pj_assert(0); - status = 0; - request_cseq = dlg->local.cseq; - break; - - case PJSIP_INVITE_METHOD: - /* For an initial INVITE, reset dialog state to NULL so we get - * 'normal' UAC notifications such as on_provisional(), etc. - * Initial INVITE is the request that is sent when the dialog has - * not been established yet. It's not necessarily the first INVITE - * sent, as when the Authorization fails, subsequent INVITE are also - * considered as an initial INVITE. - */ - if (dlg->state != PJSIP_DIALOG_STATE_ESTABLISHED) { - /* Set state to NULL. */ - dlg_set_state(dlg, PJSIP_DIALOG_STATE_NULL, NULL); - - } else { - /* This is a re-INVITE */ - } - status = 0; - request_cseq = dlg->local.cseq + 1; - break; - - default: - status = 0; - request_cseq = dlg->local.cseq + 1; - break; - } - - if (status != 0) - goto on_return; - - /* Update dialog's local CSeq, if necessary. */ - if (request_cseq != dlg->local.cseq) - dlg->local.cseq = request_cseq; - - /* Update CSeq header in the request. */ - cseq_hdr = (pjsip_cseq_hdr*) pjsip_msg_find_hdr( tdata->msg, - PJSIP_H_CSEQ, NULL); - pj_assert(cseq_hdr != NULL); - - /* Update the CSeq */ - cseq_hdr->cseq = request_cseq; - - /* Force the whole message to be re-printed. */ - pjsip_tx_data_invalidate_msg( tdata ); - - /* Now send the request. */ - status = dlg_send_request(dlg, tdata); - - } else { - /* - * This is only valid for sending response to INVITE! - */ - pjsip_cseq_hdr *cseq_hdr; - - if (dlg->invite_tsx == NULL || dlg->invite_tsx->status_code >= 200) { - status = -1; - goto on_return; - } - - cseq_hdr = (pjsip_cseq_hdr*) pjsip_msg_find_hdr( tdata->msg, - PJSIP_H_CSEQ, NULL); - pj_assert(cseq_hdr); - - if (cseq_hdr->method.id != PJSIP_INVITE_METHOD) { - status = -1; - goto on_return; - } - - pj_assert(cseq_hdr->cseq == dlg->invite_tsx->cseq); - - pjsip_tsx_on_tx_msg(dlg->invite_tsx, tdata); - status = 0; - } - -on_return: - /* Unlock dialog. */ - unlock_dialog(dlg, &lck); - - /* Whatever happen delete the message. */ - pjsip_tx_data_dec_ref( tdata ); - - return status; -} - -/* - * Sends outgoing invitation. - */ -PJ_DEF(pjsip_tx_data*) pjsip_dlg_invite( pjsip_dlg *dlg ) -{ - pjsip_method method; - struct dialog_lock_data lck; - const pjsip_allow_hdr *allow_hdr; - pjsip_tx_data *tdata; - - pj_assert(dlg != NULL); - if (!dlg) { - return NULL; - } - - PJ_LOG(4, (dlg->obj_name, "request to send invitation")); - - /* Lock dialog. */ - lock_dialog(dlg, &lck); - - /* Create request. */ - pjsip_method_set( &method, PJSIP_INVITE_METHOD); - tdata = pjsip_dlg_create_request( dlg, &method, -1 ); - if (tdata == NULL) { - unlock_dialog(dlg, &lck); - return NULL; - } - - /* Invite SHOULD contain "Allow" header. */ - allow_hdr = pjsip_endpt_get_allow_hdr( dlg->ua->endpt ); - if (allow_hdr) { - pjsip_msg_add_hdr( tdata->msg, - pjsip_hdr_shallow_clone( tdata->pool, allow_hdr)); - } - - /* Unlock dialog. */ - unlock_dialog(dlg, &lck); - - return tdata; -} - -/* - * Cancel pending outgoing dialog invitation. - */ -PJ_DEF(pjsip_tx_data*) pjsip_dlg_cancel( pjsip_dlg *dlg ) -{ - pjsip_tx_data *tdata = NULL; - struct dialog_lock_data lck; - - pj_assert(dlg != NULL); - if (!dlg) { - return NULL; - } - - PJ_LOG(4, (dlg->obj_name, "request to cancel invitation")); - - lock_dialog(dlg, &lck); - - /* Check the INVITE transaction. */ - if (dlg->invite_tsx == NULL || dlg->role != PJSIP_ROLE_UAC) { - PJ_LOG(2, (dlg->obj_name, "pjsip_dlg_cancel failed: " - "no INVITE transaction found")); - goto on_return; - } - - /* Construct the CANCEL request. */ - tdata = pjsip_endpt_create_cancel( dlg->ua->endpt, - dlg->invite_tsx->last_tx ); - if (tdata == NULL) { - PJ_LOG(2, (dlg->obj_name, "pjsip_dlg_cancel failed: " - "unable to construct request")); - goto on_return; - } - - /* Add reference counter to tdata. */ - pjsip_tx_data_add_ref(tdata); - -on_return: - unlock_dialog(dlg, &lck); - return tdata; -} - - -/* - * Answer incoming dialog invitation, with either provisional responses - * or a final response. - */ -PJ_DEF(pjsip_tx_data*) pjsip_dlg_answer( pjsip_dlg *dlg, int code ) -{ - pjsip_tx_data *tdata = NULL; - pjsip_msg *msg; - struct dialog_lock_data lck; - - pj_assert(dlg != NULL); - if (!dlg) { - return NULL; - } - - PJ_LOG(4, (dlg->obj_name, "pjsip_dlg_answer: code=%d", code)); - - /* Lock dialog. */ - lock_dialog(dlg, &lck); - - /* Must have pending INVITE. */ - if (dlg->invite_tsx == NULL) { - PJ_LOG(2, (dlg->obj_name, "pjsip_dlg_answer: no INVITE transaction found")); - goto on_return; - } - /* Must be UAS. */ - if (dlg->role != PJSIP_ROLE_UAS) { - PJ_LOG(2, (dlg->obj_name, "pjsip_dlg_answer: not UAS")); - goto on_return; - } - /* Must have not answered with final response before. */ - if (dlg->invite_tsx->status_code >= 200) { - PJ_LOG(2, (dlg->obj_name, "pjsip_dlg_answer: transaction already terminated " - "with status %d", dlg->invite_tsx->status_code)); - goto on_return; - } - - /* Get transmit data and the message. - * We will rewrite the message with a new status code. - */ - only if tdata is not pending!!! - tdata = dlg->invite_tsx->last_tx; - msg = tdata->msg; - - /* Set status code and reason phrase. */ - if (code < 100 || code >= 700) code = 500; - msg->line.status.code = code; - msg->line.status.reason = *pjsip_get_status_text(code); - - /* For 2xx response, Contact and Record-Route must be added. */ - if (PJSIP_IS_STATUS_IN_CLASS(code,200)) { - const pjsip_allow_hdr *allow_hdr; - - if (pjsip_msg_find_hdr(msg, PJSIP_H_CONTACT, NULL) == NULL) { - pjsip_contact_hdr *contact; - contact = pjsip_hdr_shallow_clone( tdata->pool, dlg->local.contact); - pjsip_msg_add_hdr( msg, (pjsip_hdr*)contact ); - } - - /* 2xx response MUST contain "Allow" header. */ - allow_hdr = pjsip_endpt_get_allow_hdr( dlg->ua->endpt ); - if (allow_hdr) { - pjsip_msg_add_hdr( msg, pjsip_hdr_shallow_clone( tdata->pool, allow_hdr)); - } - } - - /* for all but 100 responses, To-tag must be set. */ - if (code != 100) { - pjsip_to_hdr *to; - to = pjsip_msg_find_hdr( msg, PJSIP_H_TO, NULL); - to->tag = dlg->local.tag; - } - - /* Reset packet buffer. */ - pjsip_tx_data_invalidate_msg(tdata); - - /* Add reference counter */ - pjsip_tx_data_add_ref(tdata); - -on_return: - - /* Unlock dialog. */ - unlock_dialog(dlg, &lck); - - return tdata; -} - - -/* - * Send BYE request to terminate the dialog's session. - */ -PJ_DEF(pjsip_tx_data*) pjsip_dlg_bye( pjsip_dlg *dlg ) -{ - pjsip_method method; - struct dialog_lock_data lck; - pjsip_tx_data *tdata; - - if (!dlg) { - pj_assert(dlg != NULL); - return NULL; - } - - PJ_LOG(4, (dlg->obj_name, "request to terminate session")); - - lock_dialog(dlg, &lck); - - pjsip_method_set( &method, PJSIP_BYE_METHOD); - tdata = pjsip_dlg_create_request( dlg, &method, -1 ); - - unlock_dialog(dlg, &lck); - - return tdata; -} - -/* - * High level function to disconnect dialog's session. Depending on dialog's - * state, this function will either send CANCEL, final response, or BYE to - * trigger the disconnection. A status code must be supplied, which will be - * sent if dialog will be transmitting a final response to INVITE. - */ -PJ_DEF(pjsip_tx_data*) pjsip_dlg_disconnect( pjsip_dlg *dlg, - int status_code ) -{ - pjsip_tx_data *tdata = NULL; - - pj_assert(dlg != NULL); - if (!dlg) { - return NULL; - } - - switch (dlg->state) { - case PJSIP_DIALOG_STATE_INCOMING: - tdata = pjsip_dlg_answer(dlg, status_code); - break; - - case PJSIP_DIALOG_STATE_CALLING: - tdata = pjsip_dlg_cancel(dlg); - break; - - case PJSIP_DIALOG_STATE_PROCEEDING: - if (dlg->role == PJSIP_ROLE_UAC) { - tdata = pjsip_dlg_cancel(dlg); - } else { - tdata = pjsip_dlg_answer(dlg, status_code); - } - break; - - case PJSIP_DIALOG_STATE_ESTABLISHED: - tdata = pjsip_dlg_bye(dlg); - break; - - default: - PJ_LOG(4,(dlg->obj_name, "Invalid state %s in pjsip_dlg_disconnect()", - dlg_state_names[dlg->state])); - break; - } - - return tdata; -} - -/* - * Handling of the receipt of 2xx/INVITE response. - */ -static void dlg_on_recv_2xx_invite( pjsip_dlg *dlg, - pjsip_event *event ) -{ - pjsip_msg *msg; - pjsip_contact_hdr *contact; - pjsip_hdr *hdr, *end_hdr; - pjsip_method method; - pjsip_tx_data *ack_tdata; - - /* Get the message */ - msg = event->src.rdata->msg; - - /* Update remote's tag information. */ - pj_strdup(dlg->pool, &dlg->remote.info->tag, &event->src.rdata->to_tag); - - /* Copy Contact information in the 2xx/INVITE response to dialog's. - * remote contact - */ - contact = pjsip_msg_find_hdr( msg, PJSIP_H_CONTACT, NULL); - if (contact) { - dlg->remote.contact = pjsip_hdr_clone( dlg->pool, contact ); - } else { - /* duplicate contact from "From" header (?) */ - PJ_LOG(4,(dlg->obj_name, "Received 200/OK to INVITE with no Contact!")); - dlg->remote.contact = pjsip_contact_hdr_create(dlg->pool); - dlg->remote.contact->uri = dlg->remote.info->uri; - } - - /* Copy Record-Route header (in reverse order) as dialog's route-set, - * overwriting previous route-set, if any, even if the received route-set - * is empty. - */ - pj_list_init(&dlg->route_set); - end_hdr = &msg->hdr; - for (hdr = msg->hdr.prev; hdr!=end_hdr; hdr = hdr->prev) { - if (hdr->type == PJSIP_H_RECORD_ROUTE) { - pjsip_route_hdr *r; - r = pjsip_hdr_clone(dlg->pool, hdr); - pjsip_routing_hdr_set_route(r); - pj_list_insert_before(&dlg->route_set, r); - } - } - - /* On receipt of 200/INVITE response, send ACK. - * This ack must be saved and retransmitted whenever we receive - * 200/INVITE retransmission, until 64*T1 seconds elapsed. - */ - pjsip_method_set( &method, PJSIP_ACK_METHOD); - ack_tdata = pjsip_dlg_create_request( dlg, &method, dlg->invite_tsx->cseq); - if (ack_tdata == NULL) { - //PJ_TODO(HANDLE_CREATE_ACK_FAILURE) - PJ_LOG(2, (dlg->obj_name, "Error sending ACK msg: can't create request")); - return; - } - - /* Send with the transaction. */ - pjsip_tsx_on_tx_ack( dlg->invite_tsx, ack_tdata); - - /* Decrement reference counter because pjsip_dlg_create_request - * automatically increments the request. - */ - pjsip_tx_data_dec_ref( ack_tdata ); -} - -/* - * State NULL, before any events have been received. - */ -static int dlg_on_state_null( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - if (event->type == PJSIP_EVENT_TSX_STATE_CHANGED && - event->src_type == PJSIP_EVENT_RX_MSG) - { - pjsip_hdr *hdr, *hdr_list; - - pj_assert(tsx->method.id == PJSIP_INVITE_METHOD); - - /* Save the INVITE transaction. */ - dlg->invite_tsx = tsx; - - /* Change state to INCOMING */ - dlg_set_state(dlg, PJSIP_DIALOG_STATE_INCOMING, event); - - /* Create response buffer. */ - tsx->last_tx = pjsip_endpt_create_response( dlg->ua->endpt, event->src.rdata, 100); - pjsip_tx_data_add_ref(tsx->last_tx); - - /* Copy the Record-Route headers into dialog's route_set, maintaining - * the order. - */ - pj_list_init(&dlg->route_set); - hdr_list = &event->src.rdata->msg->hdr; - hdr = hdr_list->next; - while (hdr != hdr_list) { - if (hdr->type == PJSIP_H_RECORD_ROUTE) { - pjsip_route_hdr *route; - route = pjsip_hdr_clone(dlg->pool, hdr); - pjsip_routing_hdr_set_route(route); - pj_list_insert_before(&dlg->route_set, route); - } - hdr = hdr->next; - } - - /* Notify application. */ - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - - } else if (event->type == PJSIP_EVENT_TSX_STATE_CHANGED && - event->src_type == PJSIP_EVENT_TX_MSG) - { - pj_assert(tsx->method.id == PJSIP_INVITE_METHOD); - - /* Save the INVITE transaction. */ - dlg->invite_tsx = tsx; - - /* Change state to CALLING. */ - dlg_set_state(dlg, PJSIP_DIALOG_STATE_CALLING, event); - - /* Notify application. */ - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - - } else { - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_OTHER, event); - } - - return 0; -} - -/* - * State INCOMING is after the (callee) dialog has been initialized with - * the incoming request, but before any responses is sent by the dialog. - */ -static int dlg_on_state_incoming( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - return dlg_on_state_proceeding_callee( dlg, tsx, event ); -} - -/* - * State CALLING is after the (caller) dialog has sent outgoing invitation - * but before any responses are received. - */ -static int dlg_on_state_calling( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - if (tsx == dlg->invite_tsx) { - return dlg_on_state_proceeding_caller( dlg, tsx, event ); - } - return 0; -} - -/* - * State PROCEEDING is after provisional response is received. - * Since the processing is similar to state CALLING, this function is also - * called for CALLING state. - */ -static int dlg_on_state_proceeding_caller( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - int dlg_is_terminated = 0; - - /* We only care about our INVITE transaction. - * Ignore other transaction progression (such as CANCEL). - */ - if (tsx != dlg->invite_tsx) { - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_OTHER, event); - return 0; - } - - if (event->type == PJSIP_EVENT_TSX_STATE_CHANGED) { - switch (tsx->state) { - case PJSIP_TSX_STATE_PROCEEDING: - if (dlg->state != PJSIP_DIALOG_STATE_PROCEEDING) { - /* Change state to PROCEEDING */ - dlg_set_state(dlg, PJSIP_DIALOG_STATE_PROCEEDING, event); - - /* Notify application. */ - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - } else { - /* Also notify application. */ - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_OTHER, event); - } - break; - - case PJSIP_TSX_STATE_COMPLETED: - /* Change dialog state. */ - if (PJSIP_IS_STATUS_IN_CLASS(tsx->status_code, 200)) { - /* Update remote target, take it from the contact hdr. */ - pjsip_contact_hdr *contact; - contact = pjsip_msg_find_hdr(event->src.rdata->msg, - PJSIP_H_CONTACT, NULL); - if (contact) { - dlg->remote.target = pjsip_uri_clone(dlg->pool, contact->uri); - } else { - PJ_LOG(4,(dlg->obj_name, - "Warning: found no Contact hdr in 200/OK")); - } - dlg_set_state(dlg, PJSIP_DIALOG_STATE_CONNECTING, event); - } else if (tsx->status_code==401 || tsx->status_code==407) { - /* Handle Authentication challenge. */ - pjsip_tx_data *tdata; - tdata = pjsip_auth_reinit_req( dlg->ua->endpt, - dlg->pool, &dlg->auth_sess, - dlg->cred_count, dlg->cred_info, - tsx->last_tx, event->src.rdata); - if (tdata) { - /* Re-use original request, with a new transaction. - * Need not to worry about CSeq, dialog will take care. - */ - pjsip_dlg_send_msg(dlg, tdata); - return 0; - } else { - dlg_set_state(dlg, PJSIP_DIALOG_STATE_DISCONNECTED, event); - } - } else { - dlg_set_state(dlg, PJSIP_DIALOG_STATE_DISCONNECTED, event); - } - - /* Notify application. */ - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - - /* Send ACK when dialog is connected. */ - if (PJSIP_IS_STATUS_IN_CLASS(tsx->status_code, 200)) { - pj_assert(event->src_type == PJSIP_EVENT_RX_MSG); - dlg_on_recv_2xx_invite(dlg, event); - } - break; - - case PJSIP_TSX_STATE_TERMINATED: - /* - * Transaction is terminated because of timeout or transport error. - * To let the application go to normal state progression, call the - * callback twice. First is to emulate disconnection, and then call - * again (with state TERMINATED) to destroy the dialog. - */ - dlg_set_state(dlg, PJSIP_DIALOG_STATE_DISCONNECTED, event); - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - - /* The INVITE transaction will be destroyed, so release reference - * to it. - */ - dlg->invite_tsx = NULL; - - /* We should terminate the dialog now. - * But it's possible that we have other pending transactions (for - * example, outgoing CANCEL is in progress). - * So destroy the dialog only if there's no other transaction. - */ - if (dlg->pending_tsx_count == 0) { - dlg_set_state(dlg, PJSIP_DIALOG_STATE_TERMINATED, event); - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - dlg_is_terminated = 1; - } - break; - - default: - pj_assert(0); - break; - } - } else { - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_OTHER, event); - } - return dlg_is_terminated ? -1 : 0; -} - -/* - * State PROCEEDING for UAS is after the callee send provisional response. - * This function is also called for INCOMING state. - */ -static int dlg_on_state_proceeding_callee( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - int dlg_is_terminated = 0; - - pj_assert( dlg->invite_tsx != NULL ); - - if (event->type == PJSIP_EVENT_TSX_STATE_CHANGED && - event->src_type == PJSIP_EVENT_TX_MSG && - tsx == dlg->invite_tsx) - { - switch (tsx->state) { - case PJSIP_TSX_STATE_PROCEEDING: - /* Change state to PROCEEDING */ - dlg_set_state(dlg, PJSIP_DIALOG_STATE_PROCEEDING, event); - - /* Notify application. */ - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - break; - - case PJSIP_TSX_STATE_COMPLETED: - case PJSIP_TSX_STATE_TERMINATED: - /* Change dialog state. */ - if (PJSIP_IS_STATUS_IN_CLASS(tsx->status_code, 200)) { - dlg_set_state(dlg, PJSIP_DIALOG_STATE_CONNECTING, event); - } else { - dlg_set_state(dlg, PJSIP_DIALOG_STATE_DISCONNECTED, event); - } - - /* Notify application. */ - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - - /* If transaction is terminated in non-2xx situation, - * terminate dialog as well. This happens when something unexpected - * occurs, such as transport error. - */ - if (tsx->state == PJSIP_TSX_STATE_TERMINATED && - !PJSIP_IS_STATUS_IN_CLASS(tsx->status_code, 200)) - { - dlg_set_state(dlg, PJSIP_DIALOG_STATE_TERMINATED, event); - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - dlg_is_terminated = 1; - } - break; - - default: - pj_assert(0); - break; - } - - } else if (event->type == PJSIP_EVENT_TSX_STATE_CHANGED && - event->src_type == PJSIP_EVENT_RX_MSG && - tsx->method.id == PJSIP_CANCEL_METHOD) - { - pjsip_tx_data *tdata; - - /* Check if sequence number matches the pending INVITE. */ - if (dlg->invite_tsx==NULL || - pj_strcmp(&tsx->branch, &dlg->invite_tsx->branch) != 0) - { - PJ_LOG(4, (dlg->obj_name, "Received CANCEL with no matching INVITE")); - - /* No matching INVITE transaction found. */ - tdata = pjsip_endpt_create_response(dlg->ua->endpt, - event->src.rdata, - PJSIP_SC_CALL_TSX_DOES_NOT_EXIST ); - pjsip_tsx_on_tx_msg(tsx, tdata); - return 0; - } - - /* Always respond the CANCEL with 200/CANCEL no matter what. */ - tdata = pjsip_endpt_create_response(dlg->ua->endpt, - event->src.rdata, - 200 ); - pjsip_tsx_on_tx_msg( tsx, tdata ); - - /* Respond the INVITE transaction with 487, only if transaction has - * not completed. - */ - if (dlg->invite_tsx->last_tx) { - if (dlg->invite_tsx->status_code < 200) { - tdata = dlg->invite_tsx->last_tx; - tdata->msg->line.status.code = 487; - tdata->msg->line.status.reason = *pjsip_get_status_text(487); - /* Reset packet buffer. */ - pjsip_tx_data_invalidate_msg(tdata); - pjsip_tsx_on_tx_msg( dlg->invite_tsx, tdata ); - } else { - PJ_LOG(4, (dlg->obj_name, "Received CANCEL with no effect, " - "Transaction already terminated " - "with status %d", - dlg->invite_tsx->status_code)); - } - } else { - tdata = pjsip_endpt_create_response(dlg->ua->endpt, - event->src.rdata, - 487); - pjsip_tsx_on_tx_msg( dlg->invite_tsx, tdata ); - } - } else { - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_OTHER, event); - } - - return dlg_is_terminated ? -1 : 0; -} - -static int dlg_on_state_proceeding( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - if (dlg->role == PJSIP_ROLE_UAC) { - return dlg_on_state_proceeding_caller( dlg, tsx, event ); - } else { - return dlg_on_state_proceeding_callee( dlg, tsx, event ); - } -} - -static int dlg_on_state_connecting( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - if (tsx == dlg->invite_tsx) { - if (event->type == PJSIP_EVENT_TSX_STATE_CHANGED && - (tsx->state == PJSIP_TSX_STATE_TERMINATED || - tsx->state == PJSIP_TSX_STATE_COMPLETED || - tsx->state == PJSIP_TSX_STATE_CONFIRMED)) - { - if (PJSIP_IS_STATUS_IN_CLASS(tsx->status_code, 200)) { - dlg_set_state(dlg, PJSIP_DIALOG_STATE_ESTABLISHED, event); - } else { - /* Probably because we never get the ACK, or transport error - * when sending ACK. - */ - dlg_set_state(dlg, PJSIP_DIALOG_STATE_DISCONNECTED, event); - } - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - } else { - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_OTHER, event); - } - } else { - /* Handle case when transaction is started when dialog is connecting - * (e.g. BYE requests cross wire. - */ - if (event->type == PJSIP_EVENT_TSX_STATE_CHANGED && - event->src_type == PJSIP_EVENT_RX_MSG && - tsx->role == PJSIP_ROLE_UAS) - { - pjsip_tx_data *response; - - if (tsx->status_code >= 200) - return 0; - - if (tsx->method.id == PJSIP_BYE_METHOD) { - /* Set state to DISCONNECTED. */ - dlg_set_state(dlg, PJSIP_DIALOG_STATE_DISCONNECTED, event); - - /* Notify application. */ - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - - response = pjsip_endpt_create_response( dlg->ua->endpt, - event->src.rdata, 200); - } else { - response = pjsip_endpt_create_response( dlg->ua->endpt, event->src.rdata, - PJSIP_SC_INTERNAL_SERVER_ERROR); - } - - if (response) - pjsip_tsx_on_tx_msg(tsx, response); - - return 0; - } - } - return 0; -} - -static int dlg_on_state_established( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - PJ_UNUSED_ARG(tsx) - - if (tsx && tsx->method.id == PJSIP_BYE_METHOD) { - /* Set state to DISCONNECTED. */ - dlg_set_state(dlg, PJSIP_DIALOG_STATE_DISCONNECTED, event); - - /* Notify application. */ - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - - /* Answer with 200/BYE. */ - if (event->src_type == PJSIP_EVENT_RX_MSG) { - pjsip_tx_data *tdata; - tdata = pjsip_endpt_create_response(dlg->ua->endpt, - event->src.rdata, - 200 ); - if (tdata) - pjsip_tsx_on_tx_msg( tsx, tdata ); - } - } else if (tsx && event->src_type == PJSIP_EVENT_RX_MSG) { - pjsip_method_e method = event->src.rdata->cseq->method.id; - - PJ_TODO(PROPERLY_HANDLE_REINVITATION) - - /* Reinvitation. The message may be INVITE or an ACK. */ - if (method == PJSIP_INVITE_METHOD) { - if (dlg->invite_tsx && dlg->invite_tsx->status_code < 200) { - /* Section 14.2: A UAS that receives a second INVITE before it - * sends the final response to a first INVITE with a lower - * CSeq sequence number on the same dialog MUST return a 500 - * (Server Internal Error) response to the second INVITE and - * MUST include a Retry-After header field with a randomly - * chosen value of between 0 and 10 seconds. - */ - pjsip_retry_after_hdr *hdr; - pjsip_tx_data *tdata = - pjsip_endpt_create_response(dlg->ua->endpt, - event->src.rdata, 500); - - if (!tdata) - return 0; - - /* Add Retry-After. */ - hdr = pjsip_retry_after_hdr_create(tdata->pool); - hdr->ivalue = 9; - pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)hdr); - - /* Send. */ - pjsip_tsx_on_tx_msg(tsx, tdata); - - return 0; - } - - /* Keep this as our current INVITE transaction. */ - dlg->invite_tsx = tsx; - - /* Create response buffer. */ - tsx->last_tx = pjsip_endpt_create_response( dlg->ua->endpt, - event->src.rdata, 100); - pjsip_tx_data_add_ref(tsx->last_tx); - - } - - /* Notify application. */ - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_MID_CALL_REQUEST, event); - - } else { - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_OTHER, event); - } - - return 0; -} - -static int dlg_on_state_disconnected( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - PJ_UNUSED_ARG(tsx) - - /* Handle case when transaction is started when dialog is disconnected - * (e.g. BYE requests cross wire. - */ - if (event->type == PJSIP_EVENT_TSX_STATE_CHANGED && - event->src_type == PJSIP_EVENT_RX_MSG && - tsx->role == PJSIP_ROLE_UAS) - { - pjsip_tx_data *response = NULL; - - if (tsx->status_code >= 200) - return 0; - - if (tsx->method.id == PJSIP_BYE_METHOD) { - response = pjsip_endpt_create_response( dlg->ua->endpt, - event->src.rdata, 200); - } else { - response = pjsip_endpt_create_response( dlg->ua->endpt, event->src.rdata, - PJSIP_SC_INTERNAL_SERVER_ERROR); - } - if (response) - pjsip_tsx_on_tx_msg(tsx, response); - - return 0; - } - /* Handle case when outgoing BYE was rejected with 401/407 */ - else if (event->type == PJSIP_EVENT_TSX_STATE_CHANGED && - event->src_type == PJSIP_EVENT_RX_MSG && - tsx->role == PJSIP_ROLE_UAC) - { - if (tsx->status_code==401 || tsx->status_code==407) { - pjsip_tx_data *tdata; - tdata = pjsip_auth_reinit_req( dlg->ua->endpt, dlg->pool, - &dlg->auth_sess, - dlg->cred_count, dlg->cred_info, - tsx->last_tx, event->src.rdata); - if (tdata) { - pjsip_dlg_send_msg(dlg, tdata); - } - } - } - - - if (dlg->pending_tsx_count == 0) { - /* Set state to TERMINATED. */ - dlg_set_state(dlg, PJSIP_DIALOG_STATE_TERMINATED, event); - - /* Notify application. */ - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_STATE_CHANGED, event); - - return -1; - } else { - dlg_call_dlg_callback(dlg, PJSIP_DIALOG_EVENT_OTHER, event); - } - - return 0; -} - -static int dlg_on_state_terminated( pjsip_dlg *dlg, - pjsip_transaction *tsx, - pjsip_event *event) -{ - PJ_UNUSED_ARG(dlg) - PJ_UNUSED_ARG(tsx) - PJ_UNUSED_ARG(event) - - return -1; -} - -- cgit v1.2.3