2696 lines
68 KiB
C
2696 lines
68 KiB
C
/* $Id$ */
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/*
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* Copyright (C) 2003-2007 Benny Prijono <benny@prijono.org>
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*
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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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*
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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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*
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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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*/
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#include <pjsip-ua/sip_inv.h>
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#include <pjsip/sip_module.h>
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#include <pjsip/sip_endpoint.h>
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#include <pjsip/sip_event.h>
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#include <pjsip/sip_transaction.h>
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#include <pjmedia/sdp.h>
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#include <pjmedia/sdp_neg.h>
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#include <pjmedia/errno.h>
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#include <pj/string.h>
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#include <pj/pool.h>
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#include <pj/assert.h>
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#include <pj/os.h>
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#include <pj/log.h>
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#define THIS_FILE "sip_invite_session.c"
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static const char *inv_state_names[] =
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{
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"NULL",
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"CALLING",
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"INCOMING",
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"EARLY",
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"CONNECTING",
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"CONFIRMED",
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"DISCONNCTD",
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"TERMINATED",
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};
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/*
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* Static prototypes.
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*/
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static pj_status_t mod_inv_load(pjsip_endpoint *endpt);
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static pj_status_t mod_inv_unload(void);
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static pj_bool_t mod_inv_on_rx_request(pjsip_rx_data *rdata);
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static pj_bool_t mod_inv_on_rx_response(pjsip_rx_data *rdata);
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static void mod_inv_on_tsx_state(pjsip_transaction*, pjsip_event*);
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static void inv_on_state_null( pjsip_inv_session *inv, pjsip_event *e);
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static void inv_on_state_calling( pjsip_inv_session *inv, pjsip_event *e);
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static void inv_on_state_incoming( pjsip_inv_session *inv, pjsip_event *e);
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static void inv_on_state_early( pjsip_inv_session *inv, pjsip_event *e);
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static void inv_on_state_connecting( pjsip_inv_session *inv, pjsip_event *e);
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static void inv_on_state_confirmed( pjsip_inv_session *inv, pjsip_event *e);
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static void inv_on_state_disconnected( pjsip_inv_session *inv, pjsip_event *e);
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static pj_status_t inv_check_sdp_in_incoming_msg( pjsip_inv_session *inv,
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pjsip_transaction *tsx,
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pjsip_rx_data *rdata);
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static pj_status_t process_answer( pjsip_inv_session *inv,
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int st_code,
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pjsip_tx_data *tdata,
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const pjmedia_sdp_session *local_sdp);
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static void (*inv_state_handler[])( pjsip_inv_session *inv, pjsip_event *e) =
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{
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&inv_on_state_null,
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&inv_on_state_calling,
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&inv_on_state_incoming,
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&inv_on_state_early,
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&inv_on_state_connecting,
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&inv_on_state_confirmed,
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&inv_on_state_disconnected,
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};
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static struct mod_inv
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{
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pjsip_module mod;
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pjsip_endpoint *endpt;
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pjsip_inv_callback cb;
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} mod_inv =
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{
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{
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NULL, NULL, /* prev, next. */
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{ "mod-invite", 10 }, /* Name. */
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-1, /* Id */
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PJSIP_MOD_PRIORITY_DIALOG_USAGE, /* Priority */
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&mod_inv_load, /* load() */
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NULL, /* start() */
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NULL, /* stop() */
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&mod_inv_unload, /* unload() */
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&mod_inv_on_rx_request, /* on_rx_request() */
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&mod_inv_on_rx_response, /* on_rx_response() */
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NULL, /* on_tx_request. */
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NULL, /* on_tx_response() */
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&mod_inv_on_tsx_state, /* on_tsx_state() */
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}
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};
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/* Invite session data to be attached to transaction. */
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struct tsx_inv_data
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{
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pjsip_inv_session *inv;
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pj_bool_t sdp_done;
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};
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/*
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* Module load()
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*/
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static pj_status_t mod_inv_load(pjsip_endpoint *endpt)
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{
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pj_str_t allowed[] = {{"INVITE", 6}, {"ACK",3}, {"BYE",3}, {"CANCEL",6}};
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pj_str_t accepted = { "application/sdp", 15 };
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/* Register supported methods: INVITE, ACK, BYE, CANCEL */
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pjsip_endpt_add_capability(endpt, &mod_inv.mod, PJSIP_H_ALLOW, NULL,
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PJ_ARRAY_SIZE(allowed), allowed);
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/* Register "application/sdp" in Accept header */
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pjsip_endpt_add_capability(endpt, &mod_inv.mod, PJSIP_H_ACCEPT, NULL,
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1, &accepted);
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return PJ_SUCCESS;
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}
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/*
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* Module unload()
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*/
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static pj_status_t mod_inv_unload(void)
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{
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/* Should remove capability here */
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return PJ_SUCCESS;
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}
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/*
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* Set session state.
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*/
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void inv_set_state(pjsip_inv_session *inv, pjsip_inv_state state,
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pjsip_event *e)
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{
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pjsip_inv_state prev_state = inv->state;
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pj_status_t status;
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/* If state is confirmed, check that SDP negotiation is done,
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* otherwise disconnect the session.
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*/
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if (state == PJSIP_INV_STATE_CONFIRMED) {
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if (pjmedia_sdp_neg_get_state(inv->neg)!=PJMEDIA_SDP_NEG_STATE_DONE) {
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pjsip_tx_data *bye;
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PJ_LOG(4,(inv->obj_name, "SDP offer/answer incomplete, ending the "
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"session"));
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status = pjsip_inv_end_session(inv, PJSIP_SC_NOT_ACCEPTABLE,
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NULL, &bye);
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if (status == PJ_SUCCESS && bye)
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status = pjsip_inv_send_msg(inv, bye);
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return;
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}
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}
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/* Set state. */
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inv->state = state;
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/* If state is DISCONNECTED, cause code MUST have been set. */
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pj_assert(inv->state != PJSIP_INV_STATE_DISCONNECTED ||
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inv->cause != 0);
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/* Call on_state_changed() callback. */
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if (mod_inv.cb.on_state_changed && inv->notify)
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(*mod_inv.cb.on_state_changed)(inv, e);
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/* Only decrement when previous state is not already DISCONNECTED */
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if (inv->state == PJSIP_INV_STATE_DISCONNECTED &&
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prev_state != PJSIP_INV_STATE_DISCONNECTED)
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{
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pjsip_dlg_dec_session(inv->dlg, &mod_inv.mod);
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}
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}
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/*
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* Set cause code.
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*/
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void inv_set_cause(pjsip_inv_session *inv, int cause_code,
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const pj_str_t *cause_text)
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{
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if (cause_code > inv->cause) {
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inv->cause = (pjsip_status_code) cause_code;
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if (cause_text)
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pj_strdup(inv->pool, &inv->cause_text, cause_text);
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else if (cause_code/100 == 2)
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inv->cause_text = pj_str("Normal call clearing");
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else
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inv->cause_text = *pjsip_get_status_text(cause_code);
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}
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}
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/*
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* Send ACK for 2xx response.
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*/
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static pj_status_t inv_send_ack(pjsip_inv_session *inv, pjsip_rx_data *rdata)
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{
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pjsip_tx_data *tdata;
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pj_status_t status;
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PJ_LOG(5,(inv->obj_name, "Received %s, sending ACK",
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pjsip_rx_data_get_info(rdata)));
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status = pjsip_dlg_create_request(inv->dlg, pjsip_get_ack_method(),
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rdata->msg_info.cseq->cseq, &tdata);
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if (status != PJ_SUCCESS) {
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/* Better luck next time */
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pj_assert(!"Unable to create ACK!");
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return status;
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}
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status = pjsip_dlg_send_request(inv->dlg, tdata, -1, NULL);
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if (status != PJ_SUCCESS) {
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/* Better luck next time */
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pj_assert(!"Unable to send ACK!");
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return status;
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}
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return PJ_SUCCESS;
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}
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/*
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* Module on_rx_request()
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*
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* This callback is called for these events:
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* - endpoint receives request which was unhandled by higher priority
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* modules (e.g. transaction layer, dialog layer).
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* - dialog distributes incoming request to its usages.
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*/
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static pj_bool_t mod_inv_on_rx_request(pjsip_rx_data *rdata)
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{
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pjsip_method *method;
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pjsip_dialog *dlg;
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pjsip_inv_session *inv;
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/* Only wants to receive request from a dialog. */
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dlg = pjsip_rdata_get_dlg(rdata);
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if (dlg == NULL)
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return PJ_FALSE;
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inv = (pjsip_inv_session*) dlg->mod_data[mod_inv.mod.id];
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/* Report to dialog that we handle INVITE, CANCEL, BYE, ACK.
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* If we need to send response, it will be sent in the state
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* handlers.
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*/
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method = &rdata->msg_info.msg->line.req.method;
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if (method->id == PJSIP_INVITE_METHOD) {
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return PJ_TRUE;
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}
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/* BYE and CANCEL must have existing invite session */
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if (method->id == PJSIP_BYE_METHOD ||
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method->id == PJSIP_CANCEL_METHOD)
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{
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if (inv == NULL)
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return PJ_FALSE;
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return PJ_TRUE;
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}
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/* On receipt ACK request, when state is CONNECTING,
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* move state to CONFIRMED.
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*/
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if (method->id == PJSIP_ACK_METHOD && inv) {
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/* Ignore ACK if pending INVITE transaction has not finished. */
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if (inv->invite_tsx &&
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inv->invite_tsx->state < PJSIP_TSX_STATE_COMPLETED)
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{
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return PJ_TRUE;
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}
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/* Terminate INVITE transaction, if it's still present. */
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if (inv->invite_tsx &&
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inv->invite_tsx->state <= PJSIP_TSX_STATE_COMPLETED)
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{
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/* Before we terminate INVITE transaction, process the SDP
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* in the ACK request, if any.
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*/
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inv_check_sdp_in_incoming_msg(inv, inv->invite_tsx, rdata);
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/* Now we can terminate the INVITE transaction */
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pj_assert(inv->invite_tsx->status_code >= 200);
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pjsip_tsx_terminate(inv->invite_tsx,
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inv->invite_tsx->status_code);
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inv->invite_tsx = NULL;
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}
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/* On receipt of ACK, only set state to confirmed when state
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* is CONNECTING (e.g. we don't want to set the state to confirmed
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* when we receive ACK retransmission after sending non-2xx!)
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*/
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if (inv->state == PJSIP_INV_STATE_CONNECTING) {
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pjsip_event event;
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PJSIP_EVENT_INIT_RX_MSG(event, rdata);
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inv_set_state(inv, PJSIP_INV_STATE_CONFIRMED, &event);
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}
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}
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return PJ_FALSE;
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}
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/*
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* Module on_rx_response().
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*
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* This callback is called for these events:
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* - dialog distributes incoming 2xx response to INVITE (outside
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* transaction) to its usages.
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* - endpoint distributes strayed responses.
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*/
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static pj_bool_t mod_inv_on_rx_response(pjsip_rx_data *rdata)
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{
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pjsip_dialog *dlg;
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pjsip_inv_session *inv;
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pjsip_msg *msg = rdata->msg_info.msg;
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dlg = pjsip_rdata_get_dlg(rdata);
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/* Ignore responses outside dialog */
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if (dlg == NULL)
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return PJ_FALSE;
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/* Ignore responses not belonging to invite session */
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inv = pjsip_dlg_get_inv_session(dlg);
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if (inv == NULL)
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return PJ_FALSE;
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/* This MAY be retransmission of 2xx response to INVITE.
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* If it is, we need to send ACK.
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*/
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if (msg->type == PJSIP_RESPONSE_MSG && msg->line.status.code/100==2 &&
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rdata->msg_info.cseq->method.id == PJSIP_INVITE_METHOD &&
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inv->invite_tsx == NULL)
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{
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inv_send_ack(inv, rdata);
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return PJ_TRUE;
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}
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/* No other processing needs to be done here. */
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return PJ_FALSE;
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}
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/*
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* Module on_tsx_state()
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*
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* This callback is called by dialog framework for all transactions
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* inside the dialog for all its dialog usages.
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*/
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static void mod_inv_on_tsx_state(pjsip_transaction *tsx, pjsip_event *e)
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{
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pjsip_dialog *dlg;
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pjsip_inv_session *inv;
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dlg = pjsip_tsx_get_dlg(tsx);
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if (dlg == NULL)
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return;
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inv = pjsip_dlg_get_inv_session(dlg);
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if (inv == NULL)
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return;
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/* Call state handler for the invite session. */
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(*inv_state_handler[inv->state])(inv, e);
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/* Call on_tsx_state */
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if (mod_inv.cb.on_tsx_state_changed && inv->notify)
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(*mod_inv.cb.on_tsx_state_changed)(inv, tsx, e);
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/* Clear invite transaction when tsx is confirmed.
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* Previously we set invite_tsx to NULL only when transaction has
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* terminated, but this didn't work when ACK has the same Via branch
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* value as the INVITE (see http://www.pjsip.org/trac/ticket/113)
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*/
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if (tsx->state>=PJSIP_TSX_STATE_CONFIRMED && tsx == inv->invite_tsx)
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inv->invite_tsx = NULL;
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}
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/*
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* Initialize the invite module.
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*/
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PJ_DEF(pj_status_t) pjsip_inv_usage_init( pjsip_endpoint *endpt,
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const pjsip_inv_callback *cb)
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{
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pj_status_t status;
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/* Check arguments. */
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PJ_ASSERT_RETURN(endpt && cb, PJ_EINVAL);
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/* Some callbacks are mandatory */
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PJ_ASSERT_RETURN(cb->on_state_changed && cb->on_new_session, PJ_EINVAL);
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/* Check if module already registered. */
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PJ_ASSERT_RETURN(mod_inv.mod.id == -1, PJ_EINVALIDOP);
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/* Copy param. */
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pj_memcpy(&mod_inv.cb, cb, sizeof(pjsip_inv_callback));
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mod_inv.endpt = endpt;
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/* Register the module. */
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status = pjsip_endpt_register_module(endpt, &mod_inv.mod);
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if (status != PJ_SUCCESS)
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return status;
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return PJ_SUCCESS;
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}
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/*
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* Get the instance of invite module.
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*/
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PJ_DEF(pjsip_module*) pjsip_inv_usage_instance(void)
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{
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return &mod_inv.mod;
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}
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/*
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* Return the invite session for the specified dialog.
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*/
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PJ_DEF(pjsip_inv_session*) pjsip_dlg_get_inv_session(pjsip_dialog *dlg)
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{
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return (pjsip_inv_session*) dlg->mod_data[mod_inv.mod.id];
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}
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/*
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* Get INVITE state name.
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*/
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PJ_DEF(const char *) pjsip_inv_state_name(pjsip_inv_state state)
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{
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PJ_ASSERT_RETURN(state >= PJSIP_INV_STATE_NULL &&
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state <= PJSIP_INV_STATE_DISCONNECTED,
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"??");
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return inv_state_names[state];
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}
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/*
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* Create UAC invite session.
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*/
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PJ_DEF(pj_status_t) pjsip_inv_create_uac( pjsip_dialog *dlg,
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const pjmedia_sdp_session *local_sdp,
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unsigned options,
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pjsip_inv_session **p_inv)
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{
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pjsip_inv_session *inv;
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pj_status_t status;
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/* Verify arguments. */
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PJ_ASSERT_RETURN(dlg && p_inv, PJ_EINVAL);
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/* Must lock dialog first */
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pjsip_dlg_inc_lock(dlg);
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/* Normalize options */
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if (options & PJSIP_INV_REQUIRE_100REL)
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options |= PJSIP_INV_SUPPORT_100REL;
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if (options & PJSIP_INV_REQUIRE_TIMER)
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options |= PJSIP_INV_SUPPORT_TIMER;
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/* Create the session */
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inv = PJ_POOL_ZALLOC_T(dlg->pool, pjsip_inv_session);
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pj_assert(inv != NULL);
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inv->pool = dlg->pool;
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inv->role = PJSIP_ROLE_UAC;
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inv->state = PJSIP_INV_STATE_NULL;
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inv->dlg = dlg;
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inv->options = options;
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inv->notify = PJ_TRUE;
|
|
inv->cause = (pjsip_status_code) 0;
|
|
|
|
/* Object name will use the same dialog pointer. */
|
|
pj_ansi_snprintf(inv->obj_name, PJ_MAX_OBJ_NAME, "inv%p", dlg);
|
|
|
|
/* Create negotiator if local_sdp is specified. */
|
|
if (local_sdp) {
|
|
status = pjmedia_sdp_neg_create_w_local_offer(dlg->pool, local_sdp,
|
|
&inv->neg);
|
|
if (status != PJ_SUCCESS) {
|
|
pjsip_dlg_dec_lock(dlg);
|
|
return status;
|
|
}
|
|
}
|
|
|
|
/* Register invite as dialog usage. */
|
|
status = pjsip_dlg_add_usage(dlg, &mod_inv.mod, inv);
|
|
if (status != PJ_SUCCESS) {
|
|
pjsip_dlg_dec_lock(dlg);
|
|
return status;
|
|
}
|
|
|
|
/* Increment dialog session */
|
|
pjsip_dlg_inc_session(dlg, &mod_inv.mod);
|
|
|
|
/* Done */
|
|
*p_inv = inv;
|
|
|
|
pjsip_dlg_dec_lock(dlg);
|
|
|
|
PJ_LOG(5,(inv->obj_name, "UAC invite session created for dialog %s",
|
|
dlg->obj_name));
|
|
|
|
return PJ_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* Verify incoming INVITE request.
|
|
*/
|
|
PJ_DEF(pj_status_t) pjsip_inv_verify_request(pjsip_rx_data *rdata,
|
|
unsigned *options,
|
|
const pjmedia_sdp_session *l_sdp,
|
|
pjsip_dialog *dlg,
|
|
pjsip_endpoint *endpt,
|
|
pjsip_tx_data **p_tdata)
|
|
{
|
|
pjsip_msg *msg;
|
|
pjsip_allow_hdr *allow;
|
|
pjsip_supported_hdr *sup_hdr;
|
|
pjsip_require_hdr *req_hdr;
|
|
int code = 200;
|
|
unsigned rem_option = 0;
|
|
pj_status_t status = PJ_SUCCESS;
|
|
pjsip_hdr res_hdr_list;
|
|
|
|
/* Init return arguments. */
|
|
if (p_tdata) *p_tdata = NULL;
|
|
|
|
/* Verify arguments. */
|
|
PJ_ASSERT_RETURN(rdata != NULL && options != NULL, PJ_EINVAL);
|
|
|
|
/* Normalize options */
|
|
if (*options & PJSIP_INV_REQUIRE_100REL)
|
|
*options |= PJSIP_INV_SUPPORT_100REL;
|
|
|
|
if (*options & PJSIP_INV_REQUIRE_TIMER)
|
|
*options |= PJSIP_INV_SUPPORT_TIMER;
|
|
|
|
/* Get the message in rdata */
|
|
msg = rdata->msg_info.msg;
|
|
|
|
/* Must be INVITE request. */
|
|
PJ_ASSERT_RETURN(msg->type == PJSIP_REQUEST_MSG &&
|
|
msg->line.req.method.id == PJSIP_INVITE_METHOD,
|
|
PJ_EINVAL);
|
|
|
|
/* If tdata is specified, then either dlg or endpt must be specified */
|
|
PJ_ASSERT_RETURN((!p_tdata) || (endpt || dlg), PJ_EINVAL);
|
|
|
|
/* Get the endpoint */
|
|
endpt = endpt ? endpt : dlg->endpt;
|
|
|
|
/* Init response header list */
|
|
pj_list_init(&res_hdr_list);
|
|
|
|
/* Check the request body, see if it'inv something that we support
|
|
* (i.e. SDP).
|
|
*/
|
|
if (msg->body) {
|
|
pjsip_msg_body *body = msg->body;
|
|
pj_str_t str_application = {"application", 11};
|
|
pj_str_t str_sdp = { "sdp", 3 };
|
|
pjmedia_sdp_session *sdp;
|
|
|
|
/* Check content type. */
|
|
if (pj_stricmp(&body->content_type.type, &str_application) != 0 ||
|
|
pj_stricmp(&body->content_type.subtype, &str_sdp) != 0)
|
|
{
|
|
/* Not "application/sdp" */
|
|
code = PJSIP_SC_UNSUPPORTED_MEDIA_TYPE;
|
|
status = PJSIP_ERRNO_FROM_SIP_STATUS(code);
|
|
|
|
if (p_tdata) {
|
|
/* Add Accept header to response */
|
|
pjsip_accept_hdr *acc;
|
|
|
|
acc = pjsip_accept_hdr_create(rdata->tp_info.pool);
|
|
PJ_ASSERT_RETURN(acc, PJ_ENOMEM);
|
|
acc->values[acc->count++] = pj_str("application/sdp");
|
|
pj_list_push_back(&res_hdr_list, acc);
|
|
}
|
|
|
|
goto on_return;
|
|
}
|
|
|
|
/* Parse and validate SDP */
|
|
status = pjmedia_sdp_parse(rdata->tp_info.pool,
|
|
(char*)body->data, body->len, &sdp);
|
|
if (status == PJ_SUCCESS)
|
|
status = pjmedia_sdp_validate(sdp);
|
|
|
|
if (status != PJ_SUCCESS) {
|
|
/* Unparseable or invalid SDP */
|
|
code = PJSIP_SC_BAD_REQUEST;
|
|
|
|
if (p_tdata) {
|
|
/* Add Warning header. */
|
|
pjsip_warning_hdr *w;
|
|
|
|
w = pjsip_warning_hdr_create_from_status(rdata->tp_info.pool,
|
|
pjsip_endpt_name(endpt),
|
|
status);
|
|
PJ_ASSERT_RETURN(w, PJ_ENOMEM);
|
|
|
|
pj_list_push_back(&res_hdr_list, w);
|
|
}
|
|
|
|
goto on_return;
|
|
}
|
|
|
|
/* Negotiate with local SDP */
|
|
if (l_sdp) {
|
|
pjmedia_sdp_neg *neg;
|
|
|
|
/* Local SDP must be valid! */
|
|
PJ_ASSERT_RETURN((status=pjmedia_sdp_validate(l_sdp))==PJ_SUCCESS,
|
|
status);
|
|
|
|
/* Create SDP negotiator */
|
|
status = pjmedia_sdp_neg_create_w_remote_offer(
|
|
rdata->tp_info.pool, l_sdp, sdp, &neg);
|
|
PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
|
|
|
|
/* Negotiate SDP */
|
|
status = pjmedia_sdp_neg_negotiate(rdata->tp_info.pool, neg, 0);
|
|
if (status != PJ_SUCCESS) {
|
|
|
|
/* Incompatible media */
|
|
code = PJSIP_SC_NOT_ACCEPTABLE_HERE;
|
|
|
|
if (p_tdata) {
|
|
pjsip_accept_hdr *acc;
|
|
pjsip_warning_hdr *w;
|
|
|
|
/* Add Warning header. */
|
|
w = pjsip_warning_hdr_create_from_status(
|
|
rdata->tp_info.pool,
|
|
pjsip_endpt_name(endpt), status);
|
|
PJ_ASSERT_RETURN(w, PJ_ENOMEM);
|
|
|
|
pj_list_push_back(&res_hdr_list, w);
|
|
|
|
/* Add Accept header to response */
|
|
acc = pjsip_accept_hdr_create(rdata->tp_info.pool);
|
|
PJ_ASSERT_RETURN(acc, PJ_ENOMEM);
|
|
acc->values[acc->count++] = pj_str("application/sdp");
|
|
pj_list_push_back(&res_hdr_list, acc);
|
|
|
|
}
|
|
|
|
goto on_return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Check supported methods, see if peer supports UPDATE.
|
|
* We just assume that peer supports standard INVITE, ACK, CANCEL, and BYE
|
|
* implicitly by sending this INVITE.
|
|
*/
|
|
allow = (pjsip_allow_hdr*) pjsip_msg_find_hdr(msg, PJSIP_H_ALLOW, NULL);
|
|
if (allow) {
|
|
unsigned i;
|
|
const pj_str_t STR_UPDATE = { "UPDATE", 6 };
|
|
|
|
for (i=0; i<allow->count; ++i) {
|
|
if (pj_stricmp(&allow->values[i], &STR_UPDATE)==0)
|
|
break;
|
|
}
|
|
|
|
if (i != allow->count) {
|
|
/* UPDATE is present in Allow */
|
|
rem_option |= PJSIP_INV_SUPPORT_UPDATE;
|
|
}
|
|
|
|
}
|
|
|
|
/* Check Supported header */
|
|
sup_hdr = (pjsip_supported_hdr*)
|
|
pjsip_msg_find_hdr(msg, PJSIP_H_SUPPORTED, NULL);
|
|
if (sup_hdr) {
|
|
unsigned i;
|
|
pj_str_t STR_100REL = { "100rel", 6};
|
|
pj_str_t STR_TIMER = { "timer", 5 };
|
|
|
|
for (i=0; i<sup_hdr->count; ++i) {
|
|
if (pj_stricmp(&sup_hdr->values[i], &STR_100REL)==0)
|
|
rem_option |= PJSIP_INV_SUPPORT_100REL;
|
|
else if (pj_stricmp(&sup_hdr->values[i], &STR_TIMER)==0)
|
|
rem_option |= PJSIP_INV_SUPPORT_TIMER;
|
|
}
|
|
}
|
|
|
|
/* Check Require header */
|
|
req_hdr = (pjsip_require_hdr*)
|
|
pjsip_msg_find_hdr(msg, PJSIP_H_REQUIRE, NULL);
|
|
if (req_hdr) {
|
|
unsigned i;
|
|
const pj_str_t STR_100REL = { "100rel", 6};
|
|
const pj_str_t STR_TIMER = { "timer", 5 };
|
|
const pj_str_t STR_REPLACES = { "replaces", 8 };
|
|
unsigned unsupp_cnt = 0;
|
|
pj_str_t unsupp_tags[PJSIP_GENERIC_ARRAY_MAX_COUNT];
|
|
|
|
for (i=0; i<req_hdr->count; ++i) {
|
|
if ((*options & PJSIP_INV_SUPPORT_100REL) &&
|
|
pj_stricmp(&req_hdr->values[i], &STR_100REL)==0)
|
|
{
|
|
rem_option |= PJSIP_INV_REQUIRE_100REL;
|
|
|
|
} else if ((*options && PJSIP_INV_SUPPORT_TIMER) &&
|
|
pj_stricmp(&req_hdr->values[i], &STR_TIMER)==0)
|
|
{
|
|
rem_option |= PJSIP_INV_REQUIRE_TIMER;
|
|
|
|
} else if (pj_stricmp(&req_hdr->values[i], &STR_REPLACES)==0) {
|
|
pj_bool_t supp;
|
|
|
|
supp = pjsip_endpt_has_capability(endpt, PJSIP_H_SUPPORTED,
|
|
NULL, &STR_REPLACES);
|
|
if (!supp)
|
|
unsupp_tags[unsupp_cnt++] = req_hdr->values[i];
|
|
|
|
} else {
|
|
/* Unknown/unsupported extension tag! */
|
|
unsupp_tags[unsupp_cnt++] = req_hdr->values[i];
|
|
}
|
|
}
|
|
|
|
/* Check if there are required tags that we don't support */
|
|
if (unsupp_cnt) {
|
|
|
|
code = PJSIP_SC_BAD_EXTENSION;
|
|
status = PJSIP_ERRNO_FROM_SIP_STATUS(code);
|
|
|
|
if (p_tdata) {
|
|
pjsip_unsupported_hdr *unsupp_hdr;
|
|
const pjsip_hdr *h;
|
|
|
|
/* Add Unsupported header. */
|
|
unsupp_hdr = pjsip_unsupported_hdr_create(rdata->tp_info.pool);
|
|
PJ_ASSERT_RETURN(unsupp_hdr != NULL, PJ_ENOMEM);
|
|
|
|
unsupp_hdr->count = unsupp_cnt;
|
|
for (i=0; i<unsupp_cnt; ++i)
|
|
unsupp_hdr->values[i] = unsupp_tags[i];
|
|
|
|
pj_list_push_back(&res_hdr_list, unsupp_hdr);
|
|
|
|
/* Add Supported header. */
|
|
h = pjsip_endpt_get_capability(endpt, PJSIP_H_SUPPORTED,
|
|
NULL);
|
|
pj_assert(h);
|
|
if (h) {
|
|
sup_hdr = (pjsip_supported_hdr*)
|
|
pjsip_hdr_clone(rdata->tp_info.pool, h);
|
|
pj_list_push_back(&res_hdr_list, sup_hdr);
|
|
}
|
|
}
|
|
|
|
goto on_return;
|
|
}
|
|
}
|
|
|
|
/* Check if there are local requirements that are not supported
|
|
* by peer.
|
|
*/
|
|
if ( ((*options & PJSIP_INV_REQUIRE_100REL)!=0 &&
|
|
(rem_option & PJSIP_INV_SUPPORT_100REL)==0) ||
|
|
((*options & PJSIP_INV_REQUIRE_TIMER)!=0 &&
|
|
(rem_option & PJSIP_INV_SUPPORT_TIMER)==0))
|
|
{
|
|
code = PJSIP_SC_EXTENSION_REQUIRED;
|
|
status = PJSIP_ERRNO_FROM_SIP_STATUS(code);
|
|
|
|
if (p_tdata) {
|
|
const pjsip_hdr *h;
|
|
|
|
/* Add Require header. */
|
|
req_hdr = pjsip_require_hdr_create(rdata->tp_info.pool);
|
|
PJ_ASSERT_RETURN(req_hdr != NULL, PJ_ENOMEM);
|
|
|
|
if (*options & PJSIP_INV_REQUIRE_100REL)
|
|
req_hdr->values[req_hdr->count++] = pj_str("100rel");
|
|
|
|
if (*options & PJSIP_INV_REQUIRE_TIMER)
|
|
req_hdr->values[req_hdr->count++] = pj_str("timer");
|
|
|
|
pj_list_push_back(&res_hdr_list, req_hdr);
|
|
|
|
/* Add Supported header. */
|
|
h = pjsip_endpt_get_capability(endpt, PJSIP_H_SUPPORTED,
|
|
NULL);
|
|
pj_assert(h);
|
|
if (h) {
|
|
sup_hdr = (pjsip_supported_hdr*)
|
|
pjsip_hdr_clone(rdata->tp_info.pool, h);
|
|
pj_list_push_back(&res_hdr_list, sup_hdr);
|
|
}
|
|
|
|
}
|
|
|
|
goto on_return;
|
|
}
|
|
|
|
on_return:
|
|
|
|
/* Create response if necessary */
|
|
if (code != 200 && p_tdata) {
|
|
pjsip_tx_data *tdata;
|
|
const pjsip_hdr *h;
|
|
|
|
if (dlg) {
|
|
status = pjsip_dlg_create_response(dlg, rdata, code, NULL,
|
|
&tdata);
|
|
} else {
|
|
status = pjsip_endpt_create_response(endpt, rdata, code, NULL,
|
|
&tdata);
|
|
}
|
|
|
|
if (status != PJ_SUCCESS)
|
|
return status;
|
|
|
|
/* Add response headers. */
|
|
h = res_hdr_list.next;
|
|
while (h != &res_hdr_list) {
|
|
pjsip_hdr *cloned;
|
|
|
|
cloned = (pjsip_hdr*) pjsip_hdr_clone(tdata->pool, h);
|
|
PJ_ASSERT_RETURN(cloned, PJ_ENOMEM);
|
|
|
|
pjsip_msg_add_hdr(tdata->msg, cloned);
|
|
|
|
h = h->next;
|
|
}
|
|
|
|
*p_tdata = tdata;
|
|
|
|
/* Can not return PJ_SUCCESS when response message is produced.
|
|
* Ref: PROTOS test ~#2490
|
|
*/
|
|
if (status == PJ_SUCCESS)
|
|
status = PJSIP_ERRNO_FROM_SIP_STATUS(code);
|
|
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Create UAS invite session.
|
|
*/
|
|
PJ_DEF(pj_status_t) pjsip_inv_create_uas( pjsip_dialog *dlg,
|
|
pjsip_rx_data *rdata,
|
|
const pjmedia_sdp_session *local_sdp,
|
|
unsigned options,
|
|
pjsip_inv_session **p_inv)
|
|
{
|
|
pjsip_inv_session *inv;
|
|
struct tsx_inv_data *tsx_inv_data;
|
|
pjsip_msg *msg;
|
|
pjmedia_sdp_session *rem_sdp = NULL;
|
|
pj_status_t status;
|
|
|
|
/* Verify arguments. */
|
|
PJ_ASSERT_RETURN(dlg && rdata && p_inv, PJ_EINVAL);
|
|
|
|
/* Dialog MUST have been initialised. */
|
|
PJ_ASSERT_RETURN(pjsip_rdata_get_tsx(rdata) != NULL, PJ_EINVALIDOP);
|
|
|
|
msg = rdata->msg_info.msg;
|
|
|
|
/* rdata MUST contain INVITE request */
|
|
PJ_ASSERT_RETURN(msg->type == PJSIP_REQUEST_MSG &&
|
|
msg->line.req.method.id == PJSIP_INVITE_METHOD,
|
|
PJ_EINVALIDOP);
|
|
|
|
/* Lock dialog */
|
|
pjsip_dlg_inc_lock(dlg);
|
|
|
|
/* Normalize options */
|
|
if (options & PJSIP_INV_REQUIRE_100REL)
|
|
options |= PJSIP_INV_SUPPORT_100REL;
|
|
|
|
if (options & PJSIP_INV_REQUIRE_TIMER)
|
|
options |= PJSIP_INV_SUPPORT_TIMER;
|
|
|
|
/* Create the session */
|
|
inv = PJ_POOL_ZALLOC_T(dlg->pool, pjsip_inv_session);
|
|
pj_assert(inv != NULL);
|
|
|
|
inv->pool = dlg->pool;
|
|
inv->role = PJSIP_ROLE_UAS;
|
|
inv->state = PJSIP_INV_STATE_NULL;
|
|
inv->dlg = dlg;
|
|
inv->options = options;
|
|
inv->notify = PJ_TRUE;
|
|
inv->cause = (pjsip_status_code) 0;
|
|
|
|
/* Object name will use the same dialog pointer. */
|
|
pj_ansi_snprintf(inv->obj_name, PJ_MAX_OBJ_NAME, "inv%p", dlg);
|
|
|
|
/* Parse SDP in message body, if present. */
|
|
if (msg->body) {
|
|
pjsip_msg_body *body = msg->body;
|
|
|
|
/* Parse and validate SDP */
|
|
status = pjmedia_sdp_parse(inv->pool, (char*)body->data, body->len,
|
|
&rem_sdp);
|
|
if (status == PJ_SUCCESS)
|
|
status = pjmedia_sdp_validate(rem_sdp);
|
|
|
|
if (status != PJ_SUCCESS) {
|
|
pjsip_dlg_dec_lock(dlg);
|
|
return status;
|
|
}
|
|
}
|
|
|
|
/* Create negotiator. */
|
|
if (rem_sdp) {
|
|
status = pjmedia_sdp_neg_create_w_remote_offer(inv->pool, local_sdp,
|
|
rem_sdp, &inv->neg);
|
|
|
|
} else if (local_sdp) {
|
|
status = pjmedia_sdp_neg_create_w_local_offer(inv->pool, local_sdp,
|
|
&inv->neg);
|
|
} else {
|
|
status = PJ_SUCCESS;
|
|
}
|
|
|
|
if (status != PJ_SUCCESS) {
|
|
pjsip_dlg_dec_lock(dlg);
|
|
return status;
|
|
}
|
|
|
|
/* Register invite as dialog usage. */
|
|
status = pjsip_dlg_add_usage(dlg, &mod_inv.mod, inv);
|
|
if (status != PJ_SUCCESS) {
|
|
pjsip_dlg_dec_lock(dlg);
|
|
return status;
|
|
}
|
|
|
|
/* Increment session in the dialog. */
|
|
pjsip_dlg_inc_session(dlg, &mod_inv.mod);
|
|
|
|
/* Save the invite transaction. */
|
|
inv->invite_tsx = pjsip_rdata_get_tsx(rdata);
|
|
|
|
/* Attach our data to the transaction. */
|
|
tsx_inv_data = PJ_POOL_ZALLOC_T(inv->invite_tsx->pool, struct tsx_inv_data);
|
|
tsx_inv_data->inv = inv;
|
|
inv->invite_tsx->mod_data[mod_inv.mod.id] = tsx_inv_data;
|
|
|
|
/* Done */
|
|
pjsip_dlg_dec_lock(dlg);
|
|
*p_inv = inv;
|
|
|
|
PJ_LOG(5,(inv->obj_name, "UAS invite session created for dialog %s",
|
|
dlg->obj_name));
|
|
|
|
return PJ_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* Forcefully terminate the session.
|
|
*/
|
|
PJ_DEF(pj_status_t) pjsip_inv_terminate( pjsip_inv_session *inv,
|
|
int st_code,
|
|
pj_bool_t notify)
|
|
{
|
|
PJ_ASSERT_RETURN(inv, PJ_EINVAL);
|
|
|
|
/* Lock dialog. */
|
|
pjsip_dlg_inc_lock(inv->dlg);
|
|
|
|
/* Set callback notify flag. */
|
|
inv->notify = notify;
|
|
|
|
/* If there's pending transaction, terminate the transaction.
|
|
* This may subsequently set the INVITE session state to
|
|
* disconnected.
|
|
*/
|
|
if (inv->invite_tsx &&
|
|
inv->invite_tsx->state <= PJSIP_TSX_STATE_COMPLETED)
|
|
{
|
|
pjsip_tsx_terminate(inv->invite_tsx, st_code);
|
|
|
|
}
|
|
|
|
/* Set cause. */
|
|
inv_set_cause(inv, st_code, NULL);
|
|
|
|
/* Forcefully terminate the session if state is not DISCONNECTED */
|
|
if (inv->state != PJSIP_INV_STATE_DISCONNECTED) {
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, NULL);
|
|
}
|
|
|
|
/* Done.
|
|
* The dec_lock() below will actually destroys the dialog if it
|
|
* has no other session.
|
|
*/
|
|
pjsip_dlg_dec_lock(inv->dlg);
|
|
|
|
return PJ_SUCCESS;
|
|
}
|
|
|
|
|
|
static void *clone_sdp(pj_pool_t *pool, const void *data, unsigned len)
|
|
{
|
|
PJ_UNUSED_ARG(len);
|
|
return pjmedia_sdp_session_clone(pool, (const pjmedia_sdp_session*)data);
|
|
}
|
|
|
|
static int print_sdp(pjsip_msg_body *body, char *buf, pj_size_t len)
|
|
{
|
|
return pjmedia_sdp_print((const pjmedia_sdp_session*)body->data, buf, len);
|
|
}
|
|
|
|
|
|
PJ_DEF(pj_status_t) pjsip_create_sdp_body( pj_pool_t *pool,
|
|
pjmedia_sdp_session *sdp,
|
|
pjsip_msg_body **p_body)
|
|
{
|
|
const pj_str_t STR_APPLICATION = { "application", 11};
|
|
const pj_str_t STR_SDP = { "sdp", 3 };
|
|
pjsip_msg_body *body;
|
|
|
|
body = PJ_POOL_ZALLOC_T(pool, pjsip_msg_body);
|
|
PJ_ASSERT_RETURN(body != NULL, PJ_ENOMEM);
|
|
|
|
body->content_type.type = STR_APPLICATION;
|
|
body->content_type.subtype = STR_SDP;
|
|
body->data = sdp;
|
|
body->len = 0;
|
|
body->clone_data = &clone_sdp;
|
|
body->print_body = &print_sdp;
|
|
|
|
*p_body = body;
|
|
|
|
return PJ_SUCCESS;
|
|
}
|
|
|
|
static pjsip_msg_body *create_sdp_body(pj_pool_t *pool,
|
|
const pjmedia_sdp_session *c_sdp)
|
|
{
|
|
pjsip_msg_body *body;
|
|
pj_status_t status;
|
|
|
|
status = pjsip_create_sdp_body(pool,
|
|
pjmedia_sdp_session_clone(pool, c_sdp),
|
|
&body);
|
|
|
|
if (status != PJ_SUCCESS)
|
|
return NULL;
|
|
|
|
return body;
|
|
}
|
|
|
|
/*
|
|
* Create initial INVITE request.
|
|
*/
|
|
PJ_DEF(pj_status_t) pjsip_inv_invite( pjsip_inv_session *inv,
|
|
pjsip_tx_data **p_tdata )
|
|
{
|
|
pjsip_tx_data *tdata;
|
|
const pjsip_hdr *hdr;
|
|
pj_bool_t has_sdp;
|
|
pj_status_t status;
|
|
|
|
/* Verify arguments. */
|
|
PJ_ASSERT_RETURN(inv && p_tdata, PJ_EINVAL);
|
|
|
|
/* State MUST be NULL or CONFIRMED. */
|
|
PJ_ASSERT_RETURN(inv->state == PJSIP_INV_STATE_NULL ||
|
|
inv->state == PJSIP_INV_STATE_CONFIRMED,
|
|
PJ_EINVALIDOP);
|
|
|
|
/* Lock dialog. */
|
|
pjsip_dlg_inc_lock(inv->dlg);
|
|
|
|
/* Create the INVITE request. */
|
|
status = pjsip_dlg_create_request(inv->dlg, pjsip_get_invite_method(), -1,
|
|
&tdata);
|
|
if (status != PJ_SUCCESS)
|
|
goto on_return;
|
|
|
|
|
|
/* If this is the first INVITE, then copy the headers from inv_hdr.
|
|
* These are the headers parsed from the request URI when the
|
|
* dialog was created.
|
|
*/
|
|
if (inv->state == PJSIP_INV_STATE_NULL) {
|
|
hdr = inv->dlg->inv_hdr.next;
|
|
|
|
while (hdr != &inv->dlg->inv_hdr) {
|
|
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)
|
|
pjsip_hdr_shallow_clone(tdata->pool, hdr));
|
|
hdr = hdr->next;
|
|
}
|
|
}
|
|
|
|
/* See if we have SDP to send. */
|
|
if (inv->neg) {
|
|
pjmedia_sdp_neg_state neg_state;
|
|
|
|
neg_state = pjmedia_sdp_neg_get_state(inv->neg);
|
|
|
|
has_sdp = (neg_state == PJMEDIA_SDP_NEG_STATE_LOCAL_OFFER ||
|
|
(neg_state == PJMEDIA_SDP_NEG_STATE_WAIT_NEGO &&
|
|
pjmedia_sdp_neg_has_local_answer(inv->neg)));
|
|
|
|
|
|
} else {
|
|
has_sdp = PJ_FALSE;
|
|
}
|
|
|
|
/* Add SDP, if any. */
|
|
if (has_sdp) {
|
|
const pjmedia_sdp_session *offer;
|
|
|
|
status = pjmedia_sdp_neg_get_neg_local(inv->neg, &offer);
|
|
if (status != PJ_SUCCESS)
|
|
goto on_return;
|
|
|
|
tdata->msg->body = create_sdp_body(tdata->pool, offer);
|
|
}
|
|
|
|
/* Add Allow header. */
|
|
if (inv->dlg->add_allow) {
|
|
hdr = pjsip_endpt_get_capability(inv->dlg->endpt, PJSIP_H_ALLOW, NULL);
|
|
if (hdr) {
|
|
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)
|
|
pjsip_hdr_shallow_clone(tdata->pool, hdr));
|
|
}
|
|
}
|
|
|
|
/* Add Supported header */
|
|
hdr = pjsip_endpt_get_capability(inv->dlg->endpt, PJSIP_H_SUPPORTED, NULL);
|
|
if (hdr) {
|
|
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)
|
|
pjsip_hdr_shallow_clone(tdata->pool, hdr));
|
|
}
|
|
|
|
/* Add Require header. */
|
|
PJ_TODO(INVITE_ADD_REQUIRE_HEADER);
|
|
|
|
/* Done. */
|
|
*p_tdata = tdata;
|
|
|
|
|
|
on_return:
|
|
pjsip_dlg_dec_lock(inv->dlg);
|
|
return status;
|
|
}
|
|
|
|
|
|
/*
|
|
* Negotiate SDP.
|
|
*/
|
|
static pj_status_t inv_negotiate_sdp( pjsip_inv_session *inv )
|
|
{
|
|
pj_status_t status;
|
|
|
|
PJ_ASSERT_RETURN(pjmedia_sdp_neg_get_state(inv->neg) ==
|
|
PJMEDIA_SDP_NEG_STATE_WAIT_NEGO,
|
|
PJMEDIA_SDPNEG_EINSTATE);
|
|
|
|
status = pjmedia_sdp_neg_negotiate(inv->pool, inv->neg, 0);
|
|
|
|
PJ_LOG(5,(inv->obj_name, "SDP negotiation done, status=%d", status));
|
|
|
|
if (mod_inv.cb.on_media_update && inv->notify)
|
|
(*mod_inv.cb.on_media_update)(inv, status);
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Check in incoming message for SDP offer/answer.
|
|
*/
|
|
static pj_status_t inv_check_sdp_in_incoming_msg( pjsip_inv_session *inv,
|
|
pjsip_transaction *tsx,
|
|
pjsip_rx_data *rdata)
|
|
{
|
|
struct tsx_inv_data *tsx_inv_data;
|
|
static const pj_str_t str_application = { "application", 11 };
|
|
static const pj_str_t str_sdp = { "sdp", 3 };
|
|
pj_status_t status;
|
|
pjsip_msg *msg;
|
|
pjmedia_sdp_session *sdp;
|
|
|
|
/* Get/attach invite session's transaction data */
|
|
tsx_inv_data = (struct tsx_inv_data*) tsx->mod_data[mod_inv.mod.id];
|
|
if (tsx_inv_data == NULL) {
|
|
tsx_inv_data = PJ_POOL_ZALLOC_T(tsx->pool, struct tsx_inv_data);
|
|
tsx_inv_data->inv = inv;
|
|
tsx->mod_data[mod_inv.mod.id] = tsx_inv_data;
|
|
}
|
|
|
|
/* MUST NOT do multiple SDP offer/answer in a single transaction.
|
|
*/
|
|
|
|
if (tsx_inv_data->sdp_done) {
|
|
if (rdata->msg_info.msg->body) {
|
|
PJ_LOG(4,(inv->obj_name, "SDP negotiation done, message "
|
|
"body is ignored"));
|
|
}
|
|
return PJ_SUCCESS;
|
|
}
|
|
|
|
/* Check if SDP is present in the message. */
|
|
|
|
msg = rdata->msg_info.msg;
|
|
if (msg->body == NULL) {
|
|
/* Message doesn't have body. */
|
|
return PJ_SUCCESS;
|
|
}
|
|
|
|
if (pj_stricmp(&msg->body->content_type.type, &str_application) ||
|
|
pj_stricmp(&msg->body->content_type.subtype, &str_sdp))
|
|
{
|
|
/* Message body is not "application/sdp" */
|
|
return PJMEDIA_SDP_EINSDP;
|
|
}
|
|
|
|
/* Parse the SDP body. */
|
|
|
|
status = pjmedia_sdp_parse(rdata->tp_info.pool,
|
|
(char*)msg->body->data,
|
|
msg->body->len, &sdp);
|
|
if (status != PJ_SUCCESS) {
|
|
char errmsg[PJ_ERR_MSG_SIZE];
|
|
pj_strerror(status, errmsg, sizeof(errmsg));
|
|
PJ_LOG(4,(THIS_FILE, "Error parsing SDP in %s: %s",
|
|
pjsip_rx_data_get_info(rdata), errmsg));
|
|
return PJMEDIA_SDP_EINSDP;
|
|
}
|
|
|
|
/* The SDP can be an offer or answer, depending on negotiator's state */
|
|
|
|
if (inv->neg == NULL ||
|
|
pjmedia_sdp_neg_get_state(inv->neg) == PJMEDIA_SDP_NEG_STATE_DONE)
|
|
{
|
|
|
|
/* This is an offer. */
|
|
|
|
PJ_LOG(5,(inv->obj_name, "Got SDP offer in %s",
|
|
pjsip_rx_data_get_info(rdata)));
|
|
|
|
if (inv->neg == NULL) {
|
|
status=pjmedia_sdp_neg_create_w_remote_offer(inv->pool, NULL,
|
|
sdp, &inv->neg);
|
|
} else {
|
|
status=pjmedia_sdp_neg_set_remote_offer(inv->pool, inv->neg, sdp);
|
|
}
|
|
|
|
if (status != PJ_SUCCESS) {
|
|
char errmsg[PJ_ERR_MSG_SIZE];
|
|
pj_strerror(status, errmsg, sizeof(errmsg));
|
|
PJ_LOG(4,(THIS_FILE, "Error processing SDP offer in %s: %s",
|
|
pjsip_rx_data_get_info(rdata), errmsg));
|
|
return PJMEDIA_SDP_EINSDP;
|
|
}
|
|
|
|
/* Inform application about remote offer. */
|
|
|
|
if (mod_inv.cb.on_rx_offer && inv->notify) {
|
|
|
|
(*mod_inv.cb.on_rx_offer)(inv, sdp);
|
|
|
|
}
|
|
|
|
} else if (pjmedia_sdp_neg_get_state(inv->neg) ==
|
|
PJMEDIA_SDP_NEG_STATE_LOCAL_OFFER)
|
|
{
|
|
|
|
/* This is an answer.
|
|
* Process and negotiate remote answer.
|
|
*/
|
|
|
|
PJ_LOG(5,(inv->obj_name, "Got SDP answer in %s",
|
|
pjsip_rx_data_get_info(rdata)));
|
|
|
|
status = pjmedia_sdp_neg_set_remote_answer(inv->pool, inv->neg, sdp);
|
|
|
|
if (status != PJ_SUCCESS) {
|
|
char errmsg[PJ_ERR_MSG_SIZE];
|
|
pj_strerror(status, errmsg, sizeof(errmsg));
|
|
PJ_LOG(4,(THIS_FILE, "Error processing SDP answer in %s: %s",
|
|
pjsip_rx_data_get_info(rdata), errmsg));
|
|
return PJMEDIA_SDP_EINSDP;
|
|
}
|
|
|
|
/* Negotiate SDP */
|
|
|
|
inv_negotiate_sdp(inv);
|
|
|
|
/* Mark this transaction has having SDP offer/answer done. */
|
|
|
|
tsx_inv_data->sdp_done = 1;
|
|
|
|
} else {
|
|
|
|
PJ_LOG(5,(THIS_FILE, "Ignored SDP in %s: negotiator state is %s",
|
|
pjsip_rx_data_get_info(rdata),
|
|
pjmedia_sdp_neg_state_str(pjmedia_sdp_neg_get_state(inv->neg))));
|
|
}
|
|
|
|
return PJ_SUCCESS;
|
|
}
|
|
|
|
|
|
/*
|
|
* Process INVITE answer, for both initial and subsequent re-INVITE
|
|
*/
|
|
static pj_status_t process_answer( pjsip_inv_session *inv,
|
|
int st_code,
|
|
pjsip_tx_data *tdata,
|
|
const pjmedia_sdp_session *local_sdp)
|
|
{
|
|
pj_status_t status;
|
|
const pjmedia_sdp_session *sdp = NULL;
|
|
|
|
/* If local_sdp is specified, then we MUST NOT have answered the
|
|
* offer before.
|
|
*/
|
|
if (local_sdp && (st_code/100==1 || st_code/100==2)) {
|
|
|
|
if (inv->neg == NULL) {
|
|
status = pjmedia_sdp_neg_create_w_local_offer(inv->pool, local_sdp,
|
|
&inv->neg);
|
|
} else if (pjmedia_sdp_neg_get_state(inv->neg)==
|
|
PJMEDIA_SDP_NEG_STATE_REMOTE_OFFER)
|
|
{
|
|
status = pjmedia_sdp_neg_set_local_answer(inv->pool, inv->neg,
|
|
local_sdp);
|
|
} else {
|
|
|
|
/* Can not specify local SDP at this state. */
|
|
pj_assert(0);
|
|
status = PJMEDIA_SDPNEG_EINSTATE;
|
|
}
|
|
|
|
if (status != PJ_SUCCESS)
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
/* If SDP negotiator is ready, start negotiation. */
|
|
if (st_code/100==2 || (st_code/10==18 && st_code!=180)) {
|
|
|
|
pjmedia_sdp_neg_state neg_state;
|
|
|
|
/* Start nego when appropriate. */
|
|
neg_state = inv->neg ? pjmedia_sdp_neg_get_state(inv->neg) :
|
|
PJMEDIA_SDP_NEG_STATE_NULL;
|
|
|
|
if (neg_state == PJMEDIA_SDP_NEG_STATE_LOCAL_OFFER) {
|
|
|
|
status = pjmedia_sdp_neg_get_neg_local(inv->neg, &sdp);
|
|
|
|
} else if (neg_state == PJMEDIA_SDP_NEG_STATE_WAIT_NEGO &&
|
|
pjmedia_sdp_neg_has_local_answer(inv->neg) )
|
|
{
|
|
struct tsx_inv_data *tsx_inv_data;
|
|
|
|
/* Get invite session's transaction data */
|
|
tsx_inv_data = (struct tsx_inv_data*)
|
|
inv->invite_tsx->mod_data[mod_inv.mod.id];
|
|
|
|
status = inv_negotiate_sdp(inv);
|
|
if (status != PJ_SUCCESS)
|
|
return status;
|
|
|
|
/* Mark this transaction has having SDP offer/answer done. */
|
|
tsx_inv_data->sdp_done = 1;
|
|
|
|
status = pjmedia_sdp_neg_get_active_local(inv->neg, &sdp);
|
|
}
|
|
}
|
|
|
|
/* Include SDP when it's available for 2xx and 18x (but not 180) response.
|
|
* Subsequent response will include this SDP.
|
|
*/
|
|
if (sdp) {
|
|
tdata->msg->body = create_sdp_body(tdata->pool, sdp);
|
|
}
|
|
|
|
|
|
return PJ_SUCCESS;
|
|
}
|
|
|
|
|
|
/*
|
|
* Create first response to INVITE
|
|
*/
|
|
PJ_DEF(pj_status_t) pjsip_inv_initial_answer( pjsip_inv_session *inv,
|
|
pjsip_rx_data *rdata,
|
|
int st_code,
|
|
const pj_str_t *st_text,
|
|
const pjmedia_sdp_session *sdp,
|
|
pjsip_tx_data **p_tdata)
|
|
{
|
|
pjsip_tx_data *tdata;
|
|
pj_status_t status;
|
|
|
|
/* Verify arguments. */
|
|
PJ_ASSERT_RETURN(inv && p_tdata, PJ_EINVAL);
|
|
|
|
/* Must have INVITE transaction. */
|
|
PJ_ASSERT_RETURN(inv->invite_tsx, PJ_EBUG);
|
|
|
|
pjsip_dlg_inc_lock(inv->dlg);
|
|
|
|
/* Create response */
|
|
status = pjsip_dlg_create_response(inv->dlg, rdata, st_code, st_text,
|
|
&tdata);
|
|
if (status != PJ_SUCCESS)
|
|
goto on_return;
|
|
|
|
/* Process SDP in answer */
|
|
status = process_answer(inv, st_code, tdata, sdp);
|
|
if (status != PJ_SUCCESS) {
|
|
pjsip_tx_data_dec_ref(tdata);
|
|
goto on_return;
|
|
}
|
|
|
|
*p_tdata = tdata;
|
|
|
|
on_return:
|
|
pjsip_dlg_dec_lock(inv->dlg);
|
|
return status;
|
|
}
|
|
|
|
|
|
/*
|
|
* Answer initial INVITE
|
|
* Re-INVITE will be answered automatically, and will not use this function.
|
|
*/
|
|
PJ_DEF(pj_status_t) pjsip_inv_answer( pjsip_inv_session *inv,
|
|
int st_code,
|
|
const pj_str_t *st_text,
|
|
const pjmedia_sdp_session *local_sdp,
|
|
pjsip_tx_data **p_tdata )
|
|
{
|
|
pjsip_tx_data *last_res;
|
|
pj_status_t status;
|
|
|
|
/* Verify arguments. */
|
|
PJ_ASSERT_RETURN(inv && p_tdata, PJ_EINVAL);
|
|
|
|
/* Must have INVITE transaction. */
|
|
PJ_ASSERT_RETURN(inv->invite_tsx, PJ_EBUG);
|
|
|
|
/* INVITE transaction MUST have transmitted a response (e.g. 100) */
|
|
PJ_ASSERT_RETURN(inv->invite_tsx->last_tx, PJ_EINVALIDOP);
|
|
|
|
pjsip_dlg_inc_lock(inv->dlg);
|
|
|
|
/* Modify last response. */
|
|
last_res = inv->invite_tsx->last_tx;
|
|
status = pjsip_dlg_modify_response(inv->dlg, last_res, st_code, st_text);
|
|
if (status != PJ_SUCCESS)
|
|
goto on_return;
|
|
|
|
|
|
/* Process SDP in answer */
|
|
status = process_answer(inv, st_code, last_res, local_sdp);
|
|
if (status != PJ_SUCCESS) {
|
|
pjsip_tx_data_dec_ref(last_res);
|
|
goto on_return;
|
|
}
|
|
|
|
|
|
*p_tdata = last_res;
|
|
|
|
on_return:
|
|
pjsip_dlg_dec_lock(inv->dlg);
|
|
return status;
|
|
}
|
|
|
|
|
|
/*
|
|
* Set SDP answer.
|
|
*/
|
|
PJ_DEF(pj_status_t) pjsip_inv_set_sdp_answer( pjsip_inv_session *inv,
|
|
const pjmedia_sdp_session *sdp )
|
|
{
|
|
pj_status_t status;
|
|
|
|
PJ_ASSERT_RETURN(inv && sdp, PJ_EINVAL);
|
|
|
|
pjsip_dlg_inc_lock(inv->dlg);
|
|
status = pjmedia_sdp_neg_set_local_answer( inv->pool, inv->neg, sdp);
|
|
pjsip_dlg_dec_lock(inv->dlg);
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
/*
|
|
* End session.
|
|
*/
|
|
PJ_DEF(pj_status_t) pjsip_inv_end_session( pjsip_inv_session *inv,
|
|
int st_code,
|
|
const pj_str_t *st_text,
|
|
pjsip_tx_data **p_tdata )
|
|
{
|
|
pjsip_tx_data *tdata;
|
|
pj_status_t status;
|
|
|
|
/* Verify arguments. */
|
|
PJ_ASSERT_RETURN(inv && p_tdata, PJ_EINVAL);
|
|
|
|
/* Set cause code. */
|
|
inv_set_cause(inv, st_code, st_text);
|
|
|
|
/* Create appropriate message. */
|
|
switch (inv->state) {
|
|
case PJSIP_INV_STATE_CALLING:
|
|
case PJSIP_INV_STATE_EARLY:
|
|
case PJSIP_INV_STATE_INCOMING:
|
|
|
|
if (inv->role == PJSIP_ROLE_UAC) {
|
|
|
|
/* For UAC when session has not been confirmed, create CANCEL. */
|
|
|
|
/* MUST have the original UAC INVITE transaction. */
|
|
PJ_ASSERT_RETURN(inv->invite_tsx != NULL, PJ_EBUG);
|
|
|
|
/* But CANCEL should only be called when we have received a
|
|
* provisional response. If we haven't received any responses,
|
|
* just destroy the transaction.
|
|
*/
|
|
if (inv->invite_tsx->status_code < 100) {
|
|
|
|
pjsip_tsx_stop_retransmit(inv->invite_tsx);
|
|
inv->cancelling = PJ_TRUE;
|
|
inv->pending_cancel = PJ_TRUE;
|
|
*p_tdata = NULL;
|
|
PJ_LOG(4, (inv->obj_name, "Stopping retransmission, "
|
|
"delaying CANCEL"));
|
|
return PJ_SUCCESS;
|
|
}
|
|
|
|
/* The CSeq here assumes that the dialog is started with an
|
|
* INVITE session. This may not be correct; dialog can be
|
|
* started as SUBSCRIBE session.
|
|
* So fix this!
|
|
*/
|
|
status = pjsip_endpt_create_cancel(inv->dlg->endpt,
|
|
inv->invite_tsx->last_tx,
|
|
&tdata);
|
|
|
|
} else {
|
|
|
|
/* For UAS, send a final response. */
|
|
tdata = inv->invite_tsx->last_tx;
|
|
PJ_ASSERT_RETURN(tdata != NULL, PJ_EINVALIDOP);
|
|
|
|
//status = pjsip_dlg_modify_response(inv->dlg, tdata, st_code,
|
|
// st_text);
|
|
status = pjsip_inv_answer(inv, st_code, st_text, NULL, &tdata);
|
|
}
|
|
break;
|
|
|
|
case PJSIP_INV_STATE_CONNECTING:
|
|
case PJSIP_INV_STATE_CONFIRMED:
|
|
/* For established dialog, send BYE */
|
|
status = pjsip_dlg_create_request(inv->dlg, pjsip_get_bye_method(),
|
|
-1, &tdata);
|
|
break;
|
|
|
|
case PJSIP_INV_STATE_DISCONNECTED:
|
|
/* No need to do anything. */
|
|
return PJSIP_ESESSIONTERMINATED;
|
|
|
|
default:
|
|
pj_assert("!Invalid operation!");
|
|
return PJ_EINVALIDOP;
|
|
}
|
|
|
|
if (status != PJ_SUCCESS)
|
|
return status;
|
|
|
|
|
|
/* Done */
|
|
|
|
inv->cancelling = PJ_TRUE;
|
|
*p_tdata = tdata;
|
|
|
|
return PJ_SUCCESS;
|
|
}
|
|
|
|
|
|
/*
|
|
* Create re-INVITE.
|
|
*/
|
|
PJ_DEF(pj_status_t) pjsip_inv_reinvite( pjsip_inv_session *inv,
|
|
const pj_str_t *new_contact,
|
|
const pjmedia_sdp_session *new_offer,
|
|
pjsip_tx_data **p_tdata )
|
|
{
|
|
pj_status_t status;
|
|
pjsip_contact_hdr *contact_hdr = NULL;
|
|
|
|
/* Check arguments. */
|
|
PJ_ASSERT_RETURN(inv && p_tdata, PJ_EINVAL);
|
|
|
|
/* Must NOT have a pending INVITE transaction */
|
|
if (inv->invite_tsx!=NULL)
|
|
return PJ_EINVALIDOP;
|
|
|
|
|
|
pjsip_dlg_inc_lock(inv->dlg);
|
|
|
|
if (new_contact) {
|
|
pj_str_t tmp;
|
|
const pj_str_t STR_CONTACT = { "Contact", 7 };
|
|
|
|
pj_strdup_with_null(inv->dlg->pool, &tmp, new_contact);
|
|
contact_hdr = (pjsip_contact_hdr*)
|
|
pjsip_parse_hdr(inv->dlg->pool, &STR_CONTACT,
|
|
tmp.ptr, tmp.slen, NULL);
|
|
if (!contact_hdr) {
|
|
status = PJSIP_EINVALIDURI;
|
|
goto on_return;
|
|
}
|
|
}
|
|
|
|
|
|
if (new_offer) {
|
|
if (!inv->neg) {
|
|
status = pjmedia_sdp_neg_create_w_local_offer(inv->pool, new_offer,
|
|
&inv->neg);
|
|
if (status != PJ_SUCCESS)
|
|
goto on_return;
|
|
|
|
} else switch (pjmedia_sdp_neg_get_state(inv->neg)) {
|
|
|
|
case PJMEDIA_SDP_NEG_STATE_NULL:
|
|
pj_assert(!"Unexpected SDP neg state NULL");
|
|
status = PJ_EBUG;
|
|
goto on_return;
|
|
|
|
case PJMEDIA_SDP_NEG_STATE_LOCAL_OFFER:
|
|
PJ_LOG(4,(inv->obj_name,
|
|
"pjsip_inv_reinvite: already have an offer, new "
|
|
"offer is ignored"));
|
|
break;
|
|
|
|
case PJMEDIA_SDP_NEG_STATE_REMOTE_OFFER:
|
|
status = pjmedia_sdp_neg_set_local_answer(inv->pool, inv->neg,
|
|
new_offer);
|
|
if (status != PJ_SUCCESS)
|
|
goto on_return;
|
|
break;
|
|
|
|
case PJMEDIA_SDP_NEG_STATE_WAIT_NEGO:
|
|
PJ_LOG(4,(inv->obj_name,
|
|
"pjsip_inv_reinvite: SDP in WAIT_NEGO state, new "
|
|
"offer is ignored"));
|
|
break;
|
|
|
|
case PJMEDIA_SDP_NEG_STATE_DONE:
|
|
status = pjmedia_sdp_neg_modify_local_offer(inv->pool,inv->neg,
|
|
new_offer);
|
|
if (status != PJ_SUCCESS)
|
|
goto on_return;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (contact_hdr)
|
|
inv->dlg->local.contact = contact_hdr;
|
|
|
|
status = pjsip_inv_invite(inv, p_tdata);
|
|
|
|
on_return:
|
|
pjsip_dlg_dec_lock(inv->dlg);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Create UPDATE.
|
|
*/
|
|
PJ_DEF(pj_status_t) pjsip_inv_update ( pjsip_inv_session *inv,
|
|
const pj_str_t *new_contact,
|
|
const pjmedia_sdp_session *new_offer,
|
|
pjsip_tx_data **p_tdata )
|
|
{
|
|
PJ_UNUSED_ARG(inv);
|
|
PJ_UNUSED_ARG(new_contact);
|
|
PJ_UNUSED_ARG(new_offer);
|
|
PJ_UNUSED_ARG(p_tdata);
|
|
|
|
PJ_TODO(CREATE_UPDATE_REQUEST);
|
|
return PJ_ENOTSUP;
|
|
}
|
|
|
|
/*
|
|
* Send a request or response message.
|
|
*/
|
|
PJ_DEF(pj_status_t) pjsip_inv_send_msg( pjsip_inv_session *inv,
|
|
pjsip_tx_data *tdata)
|
|
{
|
|
pj_status_t status;
|
|
|
|
/* Verify arguments. */
|
|
PJ_ASSERT_RETURN(inv && tdata, PJ_EINVAL);
|
|
|
|
PJ_LOG(5,(inv->obj_name, "Sending %s",
|
|
pjsip_tx_data_get_info(tdata)));
|
|
|
|
if (tdata->msg->type == PJSIP_REQUEST_MSG) {
|
|
struct tsx_inv_data *tsx_inv_data;
|
|
|
|
pjsip_dlg_inc_lock(inv->dlg);
|
|
|
|
tsx_inv_data = PJ_POOL_ZALLOC_T(inv->pool, struct tsx_inv_data);
|
|
tsx_inv_data->inv = inv;
|
|
|
|
pjsip_dlg_dec_lock(inv->dlg);
|
|
|
|
status = pjsip_dlg_send_request(inv->dlg, tdata, mod_inv.mod.id,
|
|
tsx_inv_data);
|
|
if (status != PJ_SUCCESS)
|
|
return status;
|
|
|
|
} else {
|
|
pjsip_cseq_hdr *cseq;
|
|
|
|
/* Can only do this to send response to original INVITE
|
|
* request.
|
|
*/
|
|
PJ_ASSERT_RETURN((cseq=(pjsip_cseq_hdr*)pjsip_msg_find_hdr(tdata->msg, PJSIP_H_CSEQ, NULL))!=NULL
|
|
&& (cseq->cseq == inv->invite_tsx->cseq),
|
|
PJ_EINVALIDOP);
|
|
|
|
status = pjsip_dlg_send_response(inv->dlg, inv->invite_tsx, tdata);
|
|
if (status != PJ_SUCCESS)
|
|
return status;
|
|
}
|
|
|
|
/* Done (?) */
|
|
return PJ_SUCCESS;
|
|
}
|
|
|
|
|
|
/*
|
|
* Respond to incoming CANCEL request.
|
|
*/
|
|
static void inv_respond_incoming_cancel(pjsip_inv_session *inv,
|
|
pjsip_transaction *cancel_tsx,
|
|
pjsip_rx_data *rdata)
|
|
{
|
|
pjsip_tx_data *tdata;
|
|
pjsip_transaction *invite_tsx;
|
|
pj_str_t key;
|
|
pj_status_t status;
|
|
|
|
/* See if we have matching INVITE server transaction: */
|
|
|
|
pjsip_tsx_create_key(rdata->tp_info.pool, &key, PJSIP_ROLE_UAS,
|
|
pjsip_get_invite_method(), rdata);
|
|
invite_tsx = pjsip_tsx_layer_find_tsx(&key, PJ_TRUE);
|
|
|
|
if (invite_tsx == NULL) {
|
|
|
|
/* Invite transaction not found!
|
|
* Respond CANCEL with 491 (RFC 3261 Section 9.2 page 42)
|
|
*/
|
|
status = pjsip_dlg_create_response( inv->dlg, rdata, 200, NULL,
|
|
&tdata);
|
|
|
|
} else {
|
|
/* Always answer CANCEL will 200 (OK) regardless of
|
|
* the state of the INVITE transaction.
|
|
*/
|
|
status = pjsip_dlg_create_response( inv->dlg, rdata, 200, NULL,
|
|
&tdata);
|
|
}
|
|
|
|
/* See if we have created the response successfully. */
|
|
if (status != PJ_SUCCESS) return;
|
|
|
|
/* Send the CANCEL response */
|
|
status = pjsip_dlg_send_response(inv->dlg, cancel_tsx, tdata);
|
|
if (status != PJ_SUCCESS) return;
|
|
|
|
|
|
/* See if we need to terminate the UAS INVITE transaction
|
|
* with 487 (Request Terminated) response.
|
|
*/
|
|
if (invite_tsx && invite_tsx->status_code < 200) {
|
|
|
|
pj_assert(invite_tsx->last_tx != NULL);
|
|
|
|
tdata = invite_tsx->last_tx;
|
|
|
|
status = pjsip_dlg_modify_response(inv->dlg, tdata, 487, NULL);
|
|
if (status == PJ_SUCCESS)
|
|
pjsip_dlg_send_response(inv->dlg, invite_tsx, tdata);
|
|
}
|
|
|
|
if (invite_tsx)
|
|
pj_mutex_unlock(invite_tsx->mutex);
|
|
}
|
|
|
|
|
|
/*
|
|
* Respond to incoming BYE request.
|
|
*/
|
|
static void inv_respond_incoming_bye( pjsip_inv_session *inv,
|
|
pjsip_transaction *bye_tsx,
|
|
pjsip_rx_data *rdata,
|
|
pjsip_event *e )
|
|
{
|
|
pj_status_t status;
|
|
pjsip_tx_data *tdata;
|
|
|
|
/* Respond BYE with 200: */
|
|
|
|
status = pjsip_dlg_create_response(inv->dlg, rdata, 200, NULL, &tdata);
|
|
if (status != PJ_SUCCESS) return;
|
|
|
|
status = pjsip_dlg_send_response(inv->dlg, bye_tsx, tdata);
|
|
if (status != PJ_SUCCESS) return;
|
|
|
|
/* Terminate session: */
|
|
|
|
if (inv->state != PJSIP_INV_STATE_DISCONNECTED) {
|
|
inv_set_cause(inv, PJSIP_SC_OK, NULL);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Respond to BYE request.
|
|
*/
|
|
static void inv_handle_bye_response( pjsip_inv_session *inv,
|
|
pjsip_transaction *tsx,
|
|
pjsip_rx_data *rdata,
|
|
pjsip_event *e )
|
|
{
|
|
pj_status_t status;
|
|
|
|
if (e->body.tsx_state.type != PJSIP_EVENT_RX_MSG) {
|
|
inv_set_cause(inv, PJSIP_SC_OK, NULL);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
return;
|
|
}
|
|
|
|
/* Handle 401/407 challenge. */
|
|
if (tsx->status_code == 401 || tsx->status_code == 407) {
|
|
|
|
pjsip_tx_data *tdata;
|
|
|
|
status = pjsip_auth_clt_reinit_req( &inv->dlg->auth_sess,
|
|
rdata,
|
|
tsx->last_tx,
|
|
&tdata);
|
|
|
|
if (status != PJ_SUCCESS) {
|
|
|
|
/* Does not have proper credentials.
|
|
* End the session anyway.
|
|
*/
|
|
inv_set_cause(inv, PJSIP_SC_OK, NULL);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
|
|
} else {
|
|
/* Re-send BYE. */
|
|
status = pjsip_inv_send_msg(inv, tdata);
|
|
}
|
|
|
|
} else {
|
|
|
|
/* End the session. */
|
|
inv_set_cause(inv, PJSIP_SC_OK, NULL);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
* State NULL is before anything is sent/received.
|
|
*/
|
|
static void inv_on_state_null( pjsip_inv_session *inv, pjsip_event *e)
|
|
{
|
|
pjsip_transaction *tsx = e->body.tsx_state.tsx;
|
|
pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx);
|
|
|
|
PJ_ASSERT_ON_FAIL(tsx && dlg, return);
|
|
|
|
if (tsx->method.id == PJSIP_INVITE_METHOD) {
|
|
|
|
/* Keep the initial INVITE transaction. */
|
|
if (inv->invite_tsx == NULL)
|
|
inv->invite_tsx = tsx;
|
|
|
|
if (dlg->role == PJSIP_ROLE_UAC) {
|
|
|
|
switch (tsx->state) {
|
|
case PJSIP_TSX_STATE_CALLING:
|
|
inv_set_state(inv, PJSIP_INV_STATE_CALLING, e);
|
|
break;
|
|
default:
|
|
inv_on_state_calling(inv, e);
|
|
break;
|
|
}
|
|
|
|
} else {
|
|
switch (tsx->state) {
|
|
case PJSIP_TSX_STATE_TRYING:
|
|
inv_set_state(inv, PJSIP_INV_STATE_INCOMING, e);
|
|
break;
|
|
case PJSIP_TSX_STATE_PROCEEDING:
|
|
inv_set_state(inv, PJSIP_INV_STATE_INCOMING, e);
|
|
if (tsx->status_code > 100)
|
|
inv_set_state(inv, PJSIP_INV_STATE_EARLY, e);
|
|
break;
|
|
default:
|
|
inv_on_state_incoming(inv, e);
|
|
break;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
pj_assert(!"Unexpected transaction type");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* State CALLING is after sending initial INVITE request but before
|
|
* any response (with tag) is received.
|
|
*/
|
|
static void inv_on_state_calling( pjsip_inv_session *inv, pjsip_event *e)
|
|
{
|
|
pjsip_transaction *tsx = e->body.tsx_state.tsx;
|
|
pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx);
|
|
pj_status_t status;
|
|
|
|
PJ_ASSERT_ON_FAIL(tsx && dlg, return);
|
|
|
|
if (tsx == inv->invite_tsx) {
|
|
|
|
switch (tsx->state) {
|
|
|
|
case PJSIP_TSX_STATE_CALLING:
|
|
inv_set_state(inv, PJSIP_INV_STATE_CALLING, e);
|
|
break;
|
|
|
|
case PJSIP_TSX_STATE_PROCEEDING:
|
|
if (inv->pending_cancel) {
|
|
pjsip_tx_data *cancel;
|
|
|
|
inv->pending_cancel = PJ_FALSE;
|
|
|
|
status = pjsip_inv_end_session(inv, 487, NULL, &cancel);
|
|
if (status == PJ_SUCCESS && cancel)
|
|
status = pjsip_inv_send_msg(inv, cancel);
|
|
}
|
|
|
|
if (dlg->remote.info->tag.slen) {
|
|
|
|
inv_set_state(inv, PJSIP_INV_STATE_EARLY, e);
|
|
|
|
inv_check_sdp_in_incoming_msg(inv, tsx,
|
|
e->body.tsx_state.src.rdata);
|
|
|
|
} else {
|
|
/* Ignore 100 (Trying) response, as it doesn't change
|
|
* session state. It only ceases retransmissions.
|
|
*/
|
|
}
|
|
break;
|
|
|
|
case PJSIP_TSX_STATE_COMPLETED:
|
|
if (tsx->status_code/100 == 2) {
|
|
|
|
/* This should not happen.
|
|
* When transaction receives 2xx, it should be terminated
|
|
*/
|
|
pj_assert(0);
|
|
inv_set_state(inv, PJSIP_INV_STATE_CONNECTING, e);
|
|
|
|
inv_check_sdp_in_incoming_msg(inv, tsx,
|
|
e->body.tsx_state.src.rdata);
|
|
|
|
} else if ((tsx->status_code==401 || tsx->status_code==407) &&
|
|
!inv->cancelling)
|
|
{
|
|
|
|
/* Handle authentication failure:
|
|
* Resend the request with Authorization header.
|
|
*/
|
|
pjsip_tx_data *tdata;
|
|
|
|
status = pjsip_auth_clt_reinit_req(&inv->dlg->auth_sess,
|
|
e->body.tsx_state.src.rdata,
|
|
tsx->last_tx,
|
|
&tdata);
|
|
|
|
if (status != PJ_SUCCESS) {
|
|
|
|
/* Does not have proper credentials.
|
|
* End the session.
|
|
*/
|
|
inv_set_cause(inv, tsx->status_code, &tsx->status_text);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
|
|
} else {
|
|
|
|
/* Restart session. */
|
|
inv->state = PJSIP_INV_STATE_NULL;
|
|
inv->invite_tsx = NULL;
|
|
|
|
/* Send the request. */
|
|
status = pjsip_inv_send_msg(inv, tdata);
|
|
}
|
|
|
|
} else {
|
|
|
|
inv_set_cause(inv, tsx->status_code, &tsx->status_text);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
|
|
}
|
|
break;
|
|
|
|
case PJSIP_TSX_STATE_TERMINATED:
|
|
/* INVITE transaction can be terminated either because UAC
|
|
* transaction received 2xx response or because of transport
|
|
* error.
|
|
*/
|
|
if (tsx->status_code/100 == 2) {
|
|
/* This must be receipt of 2xx response */
|
|
|
|
/* Set state to CONNECTING */
|
|
inv_set_state(inv, PJSIP_INV_STATE_CONNECTING, e);
|
|
|
|
inv_check_sdp_in_incoming_msg(inv, tsx,
|
|
e->body.tsx_state.src.rdata);
|
|
|
|
/* Send ACK */
|
|
pj_assert(e->body.tsx_state.type == PJSIP_EVENT_RX_MSG);
|
|
|
|
inv_send_ack(inv, e->body.tsx_state.src.rdata);
|
|
inv_set_state(inv, PJSIP_INV_STATE_CONFIRMED, e);
|
|
|
|
|
|
} else {
|
|
inv_set_cause(inv, tsx->status_code, &tsx->status_text);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
} else if (inv->role == PJSIP_ROLE_UAC &&
|
|
tsx->role == PJSIP_ROLE_UAC &&
|
|
tsx->method.id == PJSIP_CANCEL_METHOD)
|
|
{
|
|
/*
|
|
* Handle case when outgoing CANCEL is answered with 481 (Call/
|
|
* Transaction Does Not Exist), 408, or when it's timed out. In these
|
|
* cases, disconnect session (i.e. dialog usage only).
|
|
*/
|
|
if (tsx->status_code == PJSIP_SC_CALL_TSX_DOES_NOT_EXIST ||
|
|
tsx->status_code == PJSIP_SC_REQUEST_TIMEOUT ||
|
|
tsx->status_code == PJSIP_SC_TSX_TIMEOUT ||
|
|
tsx->status_code == PJSIP_SC_TSX_TRANSPORT_ERROR)
|
|
{
|
|
inv_set_cause(inv, tsx->status_code, &tsx->status_text);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* State INCOMING is after we received the request, but before
|
|
* responses with tag are sent.
|
|
*/
|
|
static void inv_on_state_incoming( pjsip_inv_session *inv, pjsip_event *e)
|
|
{
|
|
pjsip_transaction *tsx = e->body.tsx_state.tsx;
|
|
pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx);
|
|
|
|
PJ_ASSERT_ON_FAIL(tsx && dlg, return);
|
|
|
|
if (tsx == inv->invite_tsx) {
|
|
|
|
/*
|
|
* Handle the INVITE state transition.
|
|
*/
|
|
|
|
switch (tsx->state) {
|
|
|
|
case PJSIP_TSX_STATE_TRYING:
|
|
inv_set_state(inv, PJSIP_INV_STATE_INCOMING, e);
|
|
break;
|
|
|
|
case PJSIP_TSX_STATE_PROCEEDING:
|
|
/*
|
|
* Transaction sent provisional response.
|
|
*/
|
|
if (tsx->status_code > 100)
|
|
inv_set_state(inv, PJSIP_INV_STATE_EARLY, e);
|
|
break;
|
|
|
|
case PJSIP_TSX_STATE_COMPLETED:
|
|
/*
|
|
* Transaction sent final response.
|
|
*/
|
|
if (tsx->status_code/100 == 2) {
|
|
inv_set_state(inv, PJSIP_INV_STATE_CONNECTING, e);
|
|
} else {
|
|
inv_set_cause(inv, tsx->status_code, &tsx->status_text);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
}
|
|
break;
|
|
|
|
case PJSIP_TSX_STATE_TERMINATED:
|
|
/*
|
|
* This happens on transport error (e.g. failed to send
|
|
* response)
|
|
*/
|
|
inv_set_cause(inv, tsx->status_code, &tsx->status_text);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
break;
|
|
|
|
default:
|
|
pj_assert(!"Unexpected INVITE state");
|
|
break;
|
|
}
|
|
|
|
} else if (tsx->method.id == PJSIP_CANCEL_METHOD &&
|
|
tsx->role == PJSIP_ROLE_UAS &&
|
|
tsx->state < PJSIP_TSX_STATE_COMPLETED &&
|
|
e->body.tsx_state.type == PJSIP_EVENT_RX_MSG )
|
|
{
|
|
|
|
/*
|
|
* Handle incoming CANCEL request.
|
|
*/
|
|
|
|
inv_respond_incoming_cancel(inv, tsx, e->body.tsx_state.src.rdata);
|
|
|
|
}
|
|
}
|
|
|
|
/*
|
|
* State EARLY is for both UAS and UAC, after response with To tag
|
|
* is sent/received.
|
|
*/
|
|
static void inv_on_state_early( pjsip_inv_session *inv, pjsip_event *e)
|
|
{
|
|
pjsip_transaction *tsx = e->body.tsx_state.tsx;
|
|
pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx);
|
|
|
|
PJ_ASSERT_ON_FAIL(tsx && dlg, return);
|
|
|
|
if (tsx == inv->invite_tsx) {
|
|
|
|
/*
|
|
* Handle the INVITE state progress.
|
|
*/
|
|
|
|
switch (tsx->state) {
|
|
|
|
case PJSIP_TSX_STATE_PROCEEDING:
|
|
/* Send/received another provisional response. */
|
|
inv_set_state(inv, PJSIP_INV_STATE_EARLY, e);
|
|
|
|
if (e->body.tsx_state.type == PJSIP_EVENT_RX_MSG) {
|
|
inv_check_sdp_in_incoming_msg(inv, tsx,
|
|
e->body.tsx_state.src.rdata);
|
|
}
|
|
break;
|
|
|
|
case PJSIP_TSX_STATE_COMPLETED:
|
|
if (tsx->status_code/100 == 2) {
|
|
inv_set_state(inv, PJSIP_INV_STATE_CONNECTING, e);
|
|
if (e->body.tsx_state.type == PJSIP_EVENT_RX_MSG) {
|
|
inv_check_sdp_in_incoming_msg(inv, tsx,
|
|
e->body.tsx_state.src.rdata);
|
|
}
|
|
|
|
} else {
|
|
inv_set_cause(inv, tsx->status_code, &tsx->status_text);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
}
|
|
break;
|
|
|
|
case PJSIP_TSX_STATE_CONFIRMED:
|
|
/* For some reason can go here (maybe when ACK for 2xx has
|
|
* the same branch value as the INVITE transaction) */
|
|
|
|
case PJSIP_TSX_STATE_TERMINATED:
|
|
/* INVITE transaction can be terminated either because UAC
|
|
* transaction received 2xx response or because of transport
|
|
* error.
|
|
*/
|
|
if (tsx->status_code/100 == 2) {
|
|
|
|
/* This must be receipt of 2xx response */
|
|
|
|
/* Set state to CONNECTING */
|
|
inv_set_state(inv, PJSIP_INV_STATE_CONNECTING, e);
|
|
|
|
if (e->body.tsx_state.type == PJSIP_EVENT_RX_MSG) {
|
|
inv_check_sdp_in_incoming_msg(inv, tsx,
|
|
e->body.tsx_state.src.rdata);
|
|
}
|
|
|
|
/* if UAC, send ACK and move state to confirmed. */
|
|
if (tsx->role == PJSIP_ROLE_UAC) {
|
|
pj_assert(e->body.tsx_state.type == PJSIP_EVENT_RX_MSG);
|
|
|
|
inv_send_ack(inv, e->body.tsx_state.src.rdata);
|
|
inv_set_state(inv, PJSIP_INV_STATE_CONFIRMED, e);
|
|
}
|
|
|
|
} else {
|
|
inv_set_cause(inv, tsx->status_code, &tsx->status_text);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
pj_assert(!"Unexpected INVITE tsx state");
|
|
}
|
|
|
|
} else if (inv->role == PJSIP_ROLE_UAS &&
|
|
tsx->role == PJSIP_ROLE_UAS &&
|
|
tsx->method.id == PJSIP_CANCEL_METHOD &&
|
|
tsx->state < PJSIP_TSX_STATE_COMPLETED &&
|
|
e->body.tsx_state.type == PJSIP_EVENT_RX_MSG )
|
|
{
|
|
|
|
/*
|
|
* Handle incoming CANCEL request.
|
|
*/
|
|
|
|
inv_respond_incoming_cancel(inv, tsx, e->body.tsx_state.src.rdata);
|
|
|
|
} else if (inv->role == PJSIP_ROLE_UAC &&
|
|
tsx->role == PJSIP_ROLE_UAC &&
|
|
tsx->method.id == PJSIP_CANCEL_METHOD)
|
|
{
|
|
/*
|
|
* Handle case when outgoing CANCEL is answered with 481 (Call/
|
|
* Transaction Does Not Exist), 408, or when it's timed out. In these
|
|
* cases, disconnect session (i.e. dialog usage only).
|
|
*/
|
|
if (tsx->status_code == PJSIP_SC_CALL_TSX_DOES_NOT_EXIST ||
|
|
tsx->status_code == PJSIP_SC_REQUEST_TIMEOUT ||
|
|
tsx->status_code == PJSIP_SC_TSX_TIMEOUT ||
|
|
tsx->status_code == PJSIP_SC_TSX_TRANSPORT_ERROR)
|
|
{
|
|
inv_set_cause(inv, tsx->status_code, &tsx->status_text);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* State CONNECTING is after 2xx response to INVITE is sent/received.
|
|
*/
|
|
static void inv_on_state_connecting( pjsip_inv_session *inv, pjsip_event *e)
|
|
{
|
|
pjsip_transaction *tsx = e->body.tsx_state.tsx;
|
|
pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx);
|
|
|
|
PJ_ASSERT_ON_FAIL(tsx && dlg, return);
|
|
|
|
if (tsx == inv->invite_tsx) {
|
|
|
|
/*
|
|
* Handle INVITE state progression.
|
|
*/
|
|
switch (tsx->state) {
|
|
|
|
case PJSIP_TSX_STATE_CONFIRMED:
|
|
/* It can only go here if incoming ACK request has the same Via
|
|
* branch parameter as the INVITE transaction.
|
|
*/
|
|
if (tsx->status_code/100 == 2) {
|
|
if (e->body.tsx_state.type == PJSIP_EVENT_RX_MSG) {
|
|
inv_check_sdp_in_incoming_msg(inv, tsx,
|
|
e->body.tsx_state.src.rdata);
|
|
}
|
|
|
|
inv_set_state(inv, PJSIP_INV_STATE_CONFIRMED, e);
|
|
}
|
|
break;
|
|
|
|
case PJSIP_TSX_STATE_TERMINATED:
|
|
/* INVITE transaction can be terminated either because UAC
|
|
* transaction received 2xx response or because of transport
|
|
* error.
|
|
*/
|
|
if (tsx->status_code/100 != 2) {
|
|
inv_set_cause(inv, tsx->status_code, &tsx->status_text);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
}
|
|
break;
|
|
|
|
case PJSIP_TSX_STATE_DESTROYED:
|
|
/* Do nothing. */
|
|
break;
|
|
|
|
default:
|
|
pj_assert(!"Unexpected state");
|
|
}
|
|
|
|
} else if (tsx->role == PJSIP_ROLE_UAS &&
|
|
tsx->method.id == PJSIP_BYE_METHOD &&
|
|
tsx->status_code < 200 &&
|
|
e->body.tsx_state.type == PJSIP_EVENT_RX_MSG)
|
|
{
|
|
|
|
/*
|
|
* Handle incoming BYE.
|
|
*/
|
|
|
|
inv_respond_incoming_bye( inv, tsx, e->body.tsx_state.src.rdata, e );
|
|
|
|
} else if (tsx->method.id == PJSIP_BYE_METHOD &&
|
|
tsx->role == PJSIP_ROLE_UAC &&
|
|
(tsx->state == PJSIP_TSX_STATE_COMPLETED ||
|
|
tsx->state == PJSIP_TSX_STATE_TERMINATED))
|
|
{
|
|
|
|
/*
|
|
* Outgoing BYE
|
|
*/
|
|
inv_handle_bye_response( inv, tsx, e->body.tsx_state.src.rdata, e);
|
|
|
|
}
|
|
else if (tsx->method.id == PJSIP_CANCEL_METHOD &&
|
|
tsx->role == PJSIP_ROLE_UAS &&
|
|
tsx->status_code < 200 &&
|
|
e->body.tsx_state.type == PJSIP_EVENT_RX_MSG)
|
|
{
|
|
|
|
/*
|
|
* Handle strandled incoming CANCEL.
|
|
*/
|
|
pjsip_rx_data *rdata = e->body.tsx_state.src.rdata;
|
|
pjsip_tx_data *tdata;
|
|
pj_status_t status;
|
|
|
|
status = pjsip_dlg_create_response(dlg, rdata, 200, NULL, &tdata);
|
|
if (status != PJ_SUCCESS) return;
|
|
|
|
status = pjsip_dlg_send_response(dlg, tsx, tdata);
|
|
if (status != PJ_SUCCESS) return;
|
|
|
|
}
|
|
}
|
|
|
|
/*
|
|
* State CONFIRMED is after ACK is sent/received.
|
|
*/
|
|
static void inv_on_state_confirmed( pjsip_inv_session *inv, pjsip_event *e)
|
|
{
|
|
pjsip_transaction *tsx = e->body.tsx_state.tsx;
|
|
pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx);
|
|
|
|
PJ_ASSERT_ON_FAIL(tsx && dlg, return);
|
|
|
|
|
|
if (tsx->method.id == PJSIP_BYE_METHOD &&
|
|
tsx->role == PJSIP_ROLE_UAC &&
|
|
(tsx->state == PJSIP_TSX_STATE_COMPLETED ||
|
|
tsx->state == PJSIP_TSX_STATE_TERMINATED))
|
|
{
|
|
|
|
/*
|
|
* Outgoing BYE
|
|
*/
|
|
|
|
inv_handle_bye_response( inv, tsx, e->body.tsx_state.src.rdata, e);
|
|
|
|
}
|
|
else if (tsx->method.id == PJSIP_BYE_METHOD &&
|
|
tsx->role == PJSIP_ROLE_UAS &&
|
|
tsx->status_code < 200 &&
|
|
e->body.tsx_state.type == PJSIP_EVENT_RX_MSG)
|
|
{
|
|
|
|
/*
|
|
* Handle incoming BYE.
|
|
*/
|
|
|
|
inv_respond_incoming_bye( inv, tsx, e->body.tsx_state.src.rdata, e );
|
|
|
|
}
|
|
else if (tsx->method.id == PJSIP_CANCEL_METHOD &&
|
|
tsx->role == PJSIP_ROLE_UAS &&
|
|
tsx->status_code < 200 &&
|
|
e->body.tsx_state.type == PJSIP_EVENT_RX_MSG)
|
|
{
|
|
|
|
/*
|
|
* Handle strandled incoming CANCEL.
|
|
*/
|
|
pjsip_rx_data *rdata = e->body.tsx_state.src.rdata;
|
|
pjsip_tx_data *tdata;
|
|
pj_status_t status;
|
|
|
|
status = pjsip_dlg_create_response(dlg, rdata, 200, NULL, &tdata);
|
|
if (status != PJ_SUCCESS) return;
|
|
|
|
status = pjsip_dlg_send_response(dlg, tsx, tdata);
|
|
if (status != PJ_SUCCESS) return;
|
|
|
|
}
|
|
else if (tsx->method.id == PJSIP_INVITE_METHOD &&
|
|
tsx->role == PJSIP_ROLE_UAS)
|
|
{
|
|
|
|
/*
|
|
* Handle incoming re-INVITE
|
|
*/
|
|
if (tsx->state == PJSIP_TSX_STATE_TRYING) {
|
|
|
|
pjsip_rx_data *rdata = e->body.tsx_state.src.rdata;
|
|
pjsip_tx_data *tdata;
|
|
pj_status_t status;
|
|
|
|
/* Check if we have INVITE pending. */
|
|
if (inv->invite_tsx && inv->invite_tsx!=tsx) {
|
|
pj_str_t reason;
|
|
|
|
reason = pj_str("Another INVITE transaction in progress");
|
|
|
|
/* Can not receive re-INVITE while another one is pending. */
|
|
status = pjsip_dlg_create_response( inv->dlg, rdata, 500,
|
|
&reason, &tdata);
|
|
if (status != PJ_SUCCESS)
|
|
return;
|
|
|
|
status = pjsip_dlg_send_response( inv->dlg, tsx, tdata);
|
|
|
|
|
|
return;
|
|
}
|
|
|
|
/* Save the invite transaction. */
|
|
inv->invite_tsx = tsx;
|
|
|
|
/* Process SDP in incoming message. */
|
|
status = inv_check_sdp_in_incoming_msg(inv, tsx, rdata);
|
|
|
|
if (status != PJ_SUCCESS) {
|
|
|
|
/* Not Acceptable */
|
|
const pjsip_hdr *accept;
|
|
|
|
status = pjsip_dlg_create_response(inv->dlg, rdata,
|
|
488, NULL, &tdata);
|
|
if (status != PJ_SUCCESS)
|
|
return;
|
|
|
|
|
|
accept = pjsip_endpt_get_capability(dlg->endpt, PJSIP_H_ACCEPT,
|
|
NULL);
|
|
if (accept) {
|
|
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)
|
|
pjsip_hdr_clone(tdata->pool, accept));
|
|
}
|
|
|
|
status = pjsip_dlg_send_response(dlg, tsx, tdata);
|
|
|
|
return;
|
|
}
|
|
|
|
/* Create 2xx ANSWER */
|
|
status = pjsip_dlg_create_response(dlg, rdata, 200, NULL, &tdata);
|
|
if (status != PJ_SUCCESS)
|
|
return;
|
|
|
|
/* If the INVITE request has SDP body, send answer.
|
|
* Otherwise generate offer from local active SDP.
|
|
*/
|
|
if (rdata->msg_info.msg->body != NULL) {
|
|
status = process_answer(inv, 200, tdata, NULL);
|
|
} else {
|
|
/* INVITE does not have SDP.
|
|
* If on_create_offer() callback is implemented, ask app.
|
|
* to generate an offer, otherwise just send active local
|
|
* SDP to signal that nothing gets modified.
|
|
*/
|
|
pjmedia_sdp_session *sdp = NULL;
|
|
|
|
if (mod_inv.cb.on_create_offer) {
|
|
(*mod_inv.cb.on_create_offer)(inv, &sdp);
|
|
if (sdp) {
|
|
status = pjmedia_sdp_neg_modify_local_offer(dlg->pool,
|
|
inv->neg,
|
|
sdp);
|
|
}
|
|
}
|
|
|
|
if (sdp == NULL) {
|
|
const pjmedia_sdp_session *active_sdp = NULL;
|
|
status = pjmedia_sdp_neg_send_local_offer(dlg->pool,
|
|
inv->neg,
|
|
&active_sdp);
|
|
if (status == PJ_SUCCESS)
|
|
sdp = (pjmedia_sdp_session*) active_sdp;
|
|
}
|
|
|
|
if (sdp) {
|
|
tdata->msg->body = create_sdp_body(tdata->pool, sdp);
|
|
}
|
|
}
|
|
|
|
if (status != PJ_SUCCESS) {
|
|
/*
|
|
* SDP negotiation has failed.
|
|
*/
|
|
pj_status_t rc;
|
|
pj_str_t reason;
|
|
|
|
/* Delete the 2xx answer */
|
|
pjsip_tx_data_dec_ref(tdata);
|
|
|
|
/* Create 500 response */
|
|
reason = pj_str("SDP negotiation failed");
|
|
rc = pjsip_dlg_create_response(dlg, rdata, 500, &reason,
|
|
&tdata);
|
|
if (rc == PJ_SUCCESS) {
|
|
pjsip_warning_hdr *w;
|
|
const pj_str_t *endpt_name;
|
|
|
|
endpt_name = pjsip_endpt_name(dlg->endpt);
|
|
w = pjsip_warning_hdr_create_from_status(tdata->pool,
|
|
endpt_name,
|
|
status);
|
|
if (w)
|
|
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)w);
|
|
|
|
pjsip_inv_send_msg(inv, tdata);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Send 2xx regardless of the status of negotiation */
|
|
status = pjsip_inv_send_msg(inv, tdata);
|
|
|
|
} else if (tsx->state == PJSIP_TSX_STATE_CONFIRMED) {
|
|
/* This is the case where ACK has the same branch as
|
|
* the INVITE request.
|
|
*/
|
|
if (tsx->status_code/100 == 2 &&
|
|
e->body.tsx_state.type == PJSIP_EVENT_RX_MSG)
|
|
{
|
|
inv_check_sdp_in_incoming_msg(inv, tsx,
|
|
e->body.tsx_state.src.rdata);
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
else if (tsx->method.id == PJSIP_INVITE_METHOD &&
|
|
tsx->role == PJSIP_ROLE_UAC)
|
|
{
|
|
/*
|
|
* Handle outgoing re-INVITE
|
|
*/
|
|
if (tsx->state == PJSIP_TSX_STATE_TERMINATED &&
|
|
tsx->status_code/100 == 2)
|
|
{
|
|
|
|
/* Re-INVITE was accepted. */
|
|
|
|
/* Process SDP */
|
|
inv_check_sdp_in_incoming_msg(inv, tsx,
|
|
e->body.tsx_state.src.rdata);
|
|
|
|
/* Send ACK */
|
|
inv_send_ack(inv, e->body.tsx_state.src.rdata);
|
|
|
|
} else if (tsx->state == PJSIP_TSX_STATE_COMPLETED &&
|
|
(tsx->status_code==401 || tsx->status_code==407))
|
|
{
|
|
pjsip_tx_data *tdata;
|
|
pj_status_t status;
|
|
|
|
/* Handle authentication challenge. */
|
|
status = pjsip_auth_clt_reinit_req( &dlg->auth_sess,
|
|
e->body.tsx_state.src.rdata,
|
|
tsx->last_tx,
|
|
&tdata);
|
|
if (status != PJ_SUCCESS)
|
|
return;
|
|
|
|
/* Send re-INVITE */
|
|
status = pjsip_inv_send_msg( inv, tdata);
|
|
|
|
} else if (tsx->status_code==PJSIP_SC_CALL_TSX_DOES_NOT_EXIST ||
|
|
tsx->status_code==PJSIP_SC_REQUEST_TIMEOUT ||
|
|
tsx->status_code >= 700)
|
|
{
|
|
/*
|
|
* Handle responses that terminates dialog.
|
|
*/
|
|
inv_set_cause(inv, tsx->status_code, &tsx->status_text);
|
|
inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e);
|
|
|
|
} else if (tsx->status_code >= 300 && tsx->status_code < 700) {
|
|
|
|
pjmedia_sdp_neg_state neg_state;
|
|
|
|
/* Outgoing INVITE transaction has failed, cancel SDP nego */
|
|
neg_state = pjmedia_sdp_neg_get_state(inv->neg);
|
|
if (neg_state == PJMEDIA_SDP_NEG_STATE_LOCAL_OFFER) {
|
|
pjmedia_sdp_neg_cancel_offer(inv->neg);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* After session has been terminated, but before dialog is destroyed
|
|
* (because dialog has other usages, or because dialog is waiting for
|
|
* the last transaction to terminate).
|
|
*/
|
|
static void inv_on_state_disconnected( pjsip_inv_session *inv, pjsip_event *e)
|
|
{
|
|
pjsip_transaction *tsx = e->body.tsx_state.tsx;
|
|
pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx);
|
|
|
|
PJ_ASSERT_ON_FAIL(tsx && dlg, return);
|
|
|
|
if (tsx->role == PJSIP_ROLE_UAS &&
|
|
tsx->status_code < 200 &&
|
|
e->body.tsx_state.type == PJSIP_EVENT_RX_MSG)
|
|
{
|
|
pjsip_rx_data *rdata = e->body.tsx_state.src.rdata;
|
|
|
|
/*
|
|
* Respond BYE with 200/OK
|
|
*/
|
|
if (tsx->method.id == PJSIP_BYE_METHOD) {
|
|
inv_respond_incoming_bye( inv, tsx, rdata, e );
|
|
} else if (tsx->method.id == PJSIP_CANCEL_METHOD) {
|
|
/*
|
|
* Respond CANCEL with 200/OK too.
|
|
*/
|
|
pjsip_tx_data *tdata;
|
|
pj_status_t status;
|
|
|
|
status = pjsip_dlg_create_response(dlg, rdata, 200, NULL, &tdata);
|
|
if (status != PJ_SUCCESS) return;
|
|
|
|
status = pjsip_dlg_send_response(dlg, tsx, tdata);
|
|
if (status != PJ_SUCCESS) return;
|
|
|
|
}
|
|
}
|
|
}
|
|
|