| /* $Id$ */ |
| /* |
| * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <pjsip-ua/sip_inv.h> |
| #include <pjsip-ua/sip_100rel.h> |
| #include <pjsip-ua/sip_timer.h> |
| #include <pjsip/sip_module.h> |
| #include <pjsip/sip_endpoint.h> |
| #include <pjsip/sip_event.h> |
| #include <pjsip/sip_multipart.h> |
| #include <pjsip/sip_transaction.h> |
| #include <pjmedia/sdp.h> |
| #include <pjmedia/sdp_neg.h> |
| #include <pjmedia/errno.h> |
| #include <pj/string.h> |
| #include <pj/pool.h> |
| #include <pj/assert.h> |
| #include <pj/os.h> |
| #include <pj/log.h> |
| #include <pj/rand.h> |
| |
| /* |
| * Note on offer/answer: |
| * |
| * The offer/answer framework in this implementation assumes the occurence |
| * of SDP in a particular request/response according to this table: |
| |
| offer answer Note: |
| ======================================================================== |
| INVITE X INVITE may contain offer |
| 18x/INVITE X X Response may contain offer or answer |
| 2xx/INVITE X X Response may contain offer or answer |
| ACK X ACK may contain answer |
| |
| PRACK X PRACK can only contain answer |
| 2xx/PRACK Response may not have offer nor answer |
| |
| UPDATE X UPDATE may only contain offer |
| 2xx/UPDATE X Response may only contain answer |
| ======================================================================== |
| |
| * |
| */ |
| |
| #define THIS_FILE "sip_inv.c" |
| |
| static const char *inv_state_names[] = |
| { |
| "NULL", |
| "CALLING", |
| "INCOMING", |
| "EARLY", |
| "CONNECTING", |
| "CONFIRMED", |
| "DISCONNCTD", |
| "TERMINATED", |
| }; |
| |
| /* UPDATE method */ |
| static const pjsip_method pjsip_update_method = |
| { |
| PJSIP_OTHER_METHOD, |
| { "UPDATE", 6 } |
| }; |
| |
| #define POOL_INIT_SIZE 256 |
| #define POOL_INC_SIZE 256 |
| |
| /* |
| * Static prototypes. |
| */ |
| static pj_status_t mod_inv_load(pjsip_endpoint *endpt); |
| static pj_status_t mod_inv_unload(void); |
| static pj_bool_t mod_inv_on_rx_request(pjsip_rx_data *rdata); |
| static pj_bool_t mod_inv_on_rx_response(pjsip_rx_data *rdata); |
| static void mod_inv_on_tsx_state(pjsip_transaction*, pjsip_event*); |
| |
| static void inv_on_state_null( pjsip_inv_session *inv, pjsip_event *e); |
| static void inv_on_state_calling( pjsip_inv_session *inv, pjsip_event *e); |
| static void inv_on_state_incoming( pjsip_inv_session *inv, pjsip_event *e); |
| static void inv_on_state_early( pjsip_inv_session *inv, pjsip_event *e); |
| static void inv_on_state_connecting( pjsip_inv_session *inv, pjsip_event *e); |
| static void inv_on_state_confirmed( pjsip_inv_session *inv, pjsip_event *e); |
| static void inv_on_state_disconnected( pjsip_inv_session *inv, pjsip_event *e); |
| |
| static pj_status_t inv_check_sdp_in_incoming_msg( pjsip_inv_session *inv, |
| pjsip_transaction *tsx, |
| pjsip_rx_data *rdata); |
| static pj_status_t inv_negotiate_sdp( pjsip_inv_session *inv ); |
| static pjsip_msg_body *create_sdp_body(pj_pool_t *pool, |
| const pjmedia_sdp_session *c_sdp); |
| static pj_status_t process_answer( pjsip_inv_session *inv, |
| int st_code, |
| pjsip_tx_data *tdata, |
| const pjmedia_sdp_session *local_sdp); |
| |
| static pj_status_t handle_timer_response(pjsip_inv_session *inv, |
| const pjsip_rx_data *rdata, |
| pj_bool_t end_sess_on_failure); |
| |
| static void (*inv_state_handler[])( pjsip_inv_session *inv, pjsip_event *e) = |
| { |
| &inv_on_state_null, |
| &inv_on_state_calling, |
| &inv_on_state_incoming, |
| &inv_on_state_early, |
| &inv_on_state_connecting, |
| &inv_on_state_confirmed, |
| &inv_on_state_disconnected, |
| }; |
| |
| static struct mod_inv |
| { |
| pjsip_module mod; |
| pjsip_endpoint *endpt; |
| pjsip_inv_callback cb; |
| } mod_inv = |
| { |
| { |
| NULL, NULL, /* prev, next. */ |
| { "mod-invite", 10 }, /* Name. */ |
| -1, /* Id */ |
| PJSIP_MOD_PRIORITY_DIALOG_USAGE, /* Priority */ |
| &mod_inv_load, /* load() */ |
| NULL, /* start() */ |
| NULL, /* stop() */ |
| &mod_inv_unload, /* unload() */ |
| &mod_inv_on_rx_request, /* on_rx_request() */ |
| &mod_inv_on_rx_response, /* on_rx_response() */ |
| NULL, /* on_tx_request. */ |
| NULL, /* on_tx_response() */ |
| &mod_inv_on_tsx_state, /* on_tsx_state() */ |
| } |
| }; |
| |
| |
| /* Invite session data to be attached to transaction. */ |
| struct tsx_inv_data |
| { |
| pjsip_inv_session *inv; /* The invite session */ |
| pj_bool_t sdp_done; /* SDP negotiation done for this tsx? */ |
| pj_bool_t retrying; /* Resend (e.g. due to 401/407) */ |
| pj_str_t done_tag; /* To tag in RX response with answer */ |
| pj_bool_t done_early;/* Negotiation was done for early med? */ |
| }; |
| |
| /* |
| * Module load() |
| */ |
| static pj_status_t mod_inv_load(pjsip_endpoint *endpt) |
| { |
| pj_str_t allowed[] = {{"INVITE", 6}, {"ACK",3}, {"BYE",3}, {"CANCEL",6}, |
| { "UPDATE", 6}}; |
| pj_str_t accepted = { "application/sdp", 15 }; |
| |
| /* Register supported methods: INVITE, ACK, BYE, CANCEL, UPDATE */ |
| pjsip_endpt_add_capability(endpt, &mod_inv.mod, PJSIP_H_ALLOW, NULL, |
| PJ_ARRAY_SIZE(allowed), allowed); |
| |
| /* Register "application/sdp" in Accept header */ |
| pjsip_endpt_add_capability(endpt, &mod_inv.mod, PJSIP_H_ACCEPT, NULL, |
| 1, &accepted); |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Module unload() |
| */ |
| static pj_status_t mod_inv_unload(void) |
| { |
| /* Should remove capability here */ |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Set session state. |
| */ |
| void inv_set_state(pjsip_inv_session *inv, pjsip_inv_state state, |
| pjsip_event *e) |
| { |
| pjsip_inv_state prev_state = inv->state; |
| pj_bool_t dont_notify = PJ_FALSE; |
| pj_status_t status; |
| |
| /* Prevent STATE_CALLING from being reported more than once because |
| * of authentication |
| * https://trac.pjsip.org/repos/ticket/1318 |
| */ |
| if (state==PJSIP_INV_STATE_CALLING && |
| (inv->cb_called & (1 << PJSIP_INV_STATE_CALLING)) != 0) |
| { |
| dont_notify = PJ_TRUE; |
| } |
| |
| /* If state is confirmed, check that SDP negotiation is done, |
| * otherwise disconnect the session. |
| */ |
| if (state == PJSIP_INV_STATE_CONFIRMED) { |
| struct tsx_inv_data *tsx_inv_data = NULL; |
| |
| if (inv->invite_tsx) { |
| tsx_inv_data = (struct tsx_inv_data*) |
| inv->invite_tsx->mod_data[mod_inv.mod.id]; |
| } |
| |
| if (pjmedia_sdp_neg_get_state(inv->neg)!=PJMEDIA_SDP_NEG_STATE_DONE && |
| (tsx_inv_data && !tsx_inv_data->sdp_done) ) |
| { |
| pjsip_tx_data *bye; |
| |
| PJ_LOG(4,(inv->obj_name, "SDP offer/answer incomplete, ending the " |
| "session")); |
| |
| status = pjsip_inv_end_session(inv, PJSIP_SC_NOT_ACCEPTABLE, |
| NULL, &bye); |
| if (status == PJ_SUCCESS && bye) |
| status = pjsip_inv_send_msg(inv, bye); |
| |
| return; |
| } |
| } |
| |
| /* Set state. */ |
| inv->state = state; |
| |
| /* If state is DISCONNECTED, cause code MUST have been set. */ |
| pj_assert(inv->state != PJSIP_INV_STATE_DISCONNECTED || |
| inv->cause != 0); |
| |
| /* Mark the callback as called for this state */ |
| inv->cb_called |= (1 << state); |
| |
| /* Call on_state_changed() callback. */ |
| if (mod_inv.cb.on_state_changed && inv->notify && !dont_notify) |
| (*mod_inv.cb.on_state_changed)(inv, e); |
| |
| /* Only decrement when previous state is not already DISCONNECTED */ |
| if (inv->state == PJSIP_INV_STATE_DISCONNECTED && |
| prev_state != PJSIP_INV_STATE_DISCONNECTED) |
| { |
| if (inv->last_ack) { |
| pjsip_tx_data_dec_ref(inv->last_ack); |
| inv->last_ack = NULL; |
| } |
| if (inv->invite_req) { |
| pjsip_tx_data_dec_ref(inv->invite_req); |
| inv->invite_req = NULL; |
| } |
| pjsip_100rel_end_session(inv); |
| pjsip_timer_end_session(inv); |
| pjsip_dlg_dec_session(inv->dlg, &mod_inv.mod); |
| |
| /* Release the flip-flop pools */ |
| pj_pool_release(inv->pool_prov); |
| inv->pool_prov = NULL; |
| pj_pool_release(inv->pool_active); |
| inv->pool_active = NULL; |
| } |
| } |
| |
| |
| /* |
| * Set cause code. |
| */ |
| void inv_set_cause(pjsip_inv_session *inv, int cause_code, |
| const pj_str_t *cause_text) |
| { |
| if (cause_code > inv->cause) { |
| inv->cause = (pjsip_status_code) cause_code; |
| if (cause_text) |
| pj_strdup(inv->pool, &inv->cause_text, cause_text); |
| else if (cause_code/100 == 2) |
| inv->cause_text = pj_str("Normal call clearing"); |
| else |
| inv->cause_text = *pjsip_get_status_text(cause_code); |
| } |
| } |
| |
| |
| /* |
| * Check if outgoing request needs to have SDP answer. |
| * This applies for both ACK and PRACK requests. |
| */ |
| static const pjmedia_sdp_session *inv_has_pending_answer(pjsip_inv_session *inv, |
| pjsip_transaction *tsx) |
| { |
| pjmedia_sdp_neg_state neg_state; |
| const pjmedia_sdp_session *sdp = NULL; |
| pj_status_t status; |
| |
| /* If SDP negotiator is ready, start negotiation. */ |
| |
| /* 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_DONE) { |
| |
| /* Nothing to do */ |
| |
| } 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; |
| struct tsx_inv_data dummy; |
| |
| /* Get invite session's transaction data. |
| * Note that tsx may be NULL, for example when application sends |
| * delayed ACK request (at this time, the original INVITE |
| * transaction may have been destroyed. |
| */ |
| if (tsx) { |
| tsx_inv_data = (struct tsx_inv_data*)tsx->mod_data[mod_inv.mod.id]; |
| } else { |
| tsx_inv_data = &dummy; |
| pj_bzero(&dummy, sizeof(dummy)); |
| dummy.inv = inv; |
| } |
| |
| status = inv_negotiate_sdp(inv); |
| if (status != PJ_SUCCESS) |
| return NULL; |
| |
| /* 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); |
| |
| } else { |
| /* This remark is only valid for ACK. |
| PJ_LOG(4,(inv->dlg->obj_name, |
| "FYI, the SDP negotiator state (%s) is in a mess " |
| "when sending this ACK/PRACK request", |
| pjmedia_sdp_neg_state_str(neg_state))); |
| */ |
| } |
| |
| return sdp; |
| } |
| |
| |
| /* |
| * Send ACK for 2xx response. |
| */ |
| static pj_status_t inv_send_ack(pjsip_inv_session *inv, pjsip_event *e) |
| { |
| pjsip_rx_data *rdata; |
| pjsip_event ack_e; |
| pj_status_t status; |
| |
| if (e->type == PJSIP_EVENT_TSX_STATE) |
| rdata = e->body.tsx_state.src.rdata; |
| else if (e->type == PJSIP_EVENT_RX_MSG) |
| rdata = e->body.rx_msg.rdata; |
| else { |
| pj_assert(!"Unsupported event type"); |
| return PJ_EBUG; |
| } |
| |
| PJ_LOG(5,(inv->obj_name, "Received %s, sending ACK", |
| pjsip_rx_data_get_info(rdata))); |
| |
| /* Check if we have cached ACK request. Must not use the cached ACK |
| * if it's still marked as pending by transport (#1011) |
| */ |
| if (inv->last_ack && rdata->msg_info.cseq->cseq == inv->last_ack_cseq && |
| !inv->last_ack->is_pending) |
| { |
| pjsip_tx_data_add_ref(inv->last_ack); |
| |
| } else if (mod_inv.cb.on_send_ack) { |
| /* If application handles ACK transmission manually, just notify the |
| * callback |
| */ |
| PJ_LOG(5,(inv->obj_name, "Received %s, notifying application callback", |
| pjsip_rx_data_get_info(rdata))); |
| |
| (*mod_inv.cb.on_send_ack)(inv, rdata); |
| return PJ_SUCCESS; |
| |
| } else { |
| status = pjsip_inv_create_ack(inv, rdata->msg_info.cseq->cseq, |
| &inv->last_ack); |
| if (status != PJ_SUCCESS) |
| return status; |
| } |
| |
| PJSIP_EVENT_INIT_TX_MSG(ack_e, inv->last_ack); |
| |
| /* Send ACK */ |
| status = pjsip_dlg_send_request(inv->dlg, inv->last_ack, -1, NULL); |
| if (status != PJ_SUCCESS) { |
| /* Better luck next time */ |
| pj_assert(!"Unable to send ACK!"); |
| return status; |
| } |
| |
| |
| /* Set state to CONFIRMED (if we're not in CONFIRMED yet). |
| * But don't set it to CONFIRMED if we're already DISCONNECTED |
| * (this may have been a late 200/OK response. |
| */ |
| if (inv->state < PJSIP_INV_STATE_CONFIRMED) { |
| inv_set_state(inv, PJSIP_INV_STATE_CONFIRMED, &ack_e); |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Module on_rx_request() |
| * |
| * This callback is called for these events: |
| * - endpoint receives request which was unhandled by higher priority |
| * modules (e.g. transaction layer, dialog layer). |
| * - dialog distributes incoming request to its usages. |
| */ |
| static pj_bool_t mod_inv_on_rx_request(pjsip_rx_data *rdata) |
| { |
| pjsip_method *method; |
| pjsip_dialog *dlg; |
| pjsip_inv_session *inv; |
| |
| /* Only wants to receive request from a dialog. */ |
| dlg = pjsip_rdata_get_dlg(rdata); |
| if (dlg == NULL) |
| return PJ_FALSE; |
| |
| inv = (pjsip_inv_session*) dlg->mod_data[mod_inv.mod.id]; |
| |
| /* Report to dialog that we handle INVITE, CANCEL, BYE, ACK. |
| * If we need to send response, it will be sent in the state |
| * handlers. |
| */ |
| method = &rdata->msg_info.msg->line.req.method; |
| |
| if (method->id == PJSIP_INVITE_METHOD) { |
| return PJ_TRUE; |
| } |
| |
| /* BYE and CANCEL must have existing invite session */ |
| if (method->id == PJSIP_BYE_METHOD || |
| method->id == PJSIP_CANCEL_METHOD) |
| { |
| if (inv == NULL) |
| return PJ_FALSE; |
| |
| return PJ_TRUE; |
| } |
| |
| /* On receipt ACK request, when state is CONNECTING, |
| * move state to CONFIRMED. |
| */ |
| if (method->id == PJSIP_ACK_METHOD && inv) { |
| |
| /* Ignore if we don't have INVITE in progress */ |
| if (!inv->invite_tsx) { |
| return PJ_TRUE; |
| } |
| |
| /* Ignore ACK if pending INVITE transaction has not finished. */ |
| if (inv->invite_tsx->state < PJSIP_TSX_STATE_COMPLETED) { |
| return PJ_TRUE; |
| } |
| |
| /* Ignore ACK with different CSeq |
| * https://trac.pjsip.org/repos/ticket/1391 |
| */ |
| if (rdata->msg_info.cseq->cseq != inv->invite_tsx->cseq) { |
| return PJ_TRUE; |
| } |
| |
| /* Terminate INVITE transaction, if it's still present. */ |
| if (inv->invite_tsx->state <= PJSIP_TSX_STATE_COMPLETED) { |
| /* Before we terminate INVITE transaction, process the SDP |
| * in the ACK request, if any. |
| * Only do this when invite state is not already disconnected |
| * (http://trac.pjsip.org/repos/ticket/640). |
| */ |
| if (inv->state < PJSIP_INV_STATE_DISCONNECTED) { |
| inv_check_sdp_in_incoming_msg(inv, inv->invite_tsx, rdata); |
| |
| /* Check if local offer got no SDP answer and INVITE session |
| * is in CONFIRMED state. |
| */ |
| if (pjmedia_sdp_neg_get_state(inv->neg)== |
| PJMEDIA_SDP_NEG_STATE_LOCAL_OFFER && |
| inv->state==PJSIP_INV_STATE_CONFIRMED) |
| { |
| pjmedia_sdp_neg_cancel_offer(inv->neg); |
| } |
| } |
| |
| /* Now we can terminate the INVITE transaction */ |
| pj_assert(inv->invite_tsx->status_code >= 200); |
| pjsip_tsx_terminate(inv->invite_tsx, |
| inv->invite_tsx->status_code); |
| inv->invite_tsx = NULL; |
| if (inv->last_answer) { |
| pjsip_tx_data_dec_ref(inv->last_answer); |
| inv->last_answer = NULL; |
| } |
| } |
| |
| /* On receipt of ACK, only set state to confirmed when state |
| * is CONNECTING (e.g. we don't want to set the state to confirmed |
| * when we receive ACK retransmission after sending non-2xx!) |
| */ |
| if (inv->state == PJSIP_INV_STATE_CONNECTING) { |
| pjsip_event event; |
| |
| PJSIP_EVENT_INIT_RX_MSG(event, rdata); |
| inv_set_state(inv, PJSIP_INV_STATE_CONFIRMED, &event); |
| } |
| } |
| |
| return PJ_FALSE; |
| } |
| |
| /* This function will process Session Timer headers in received |
| * 2xx or 422 response of INVITE/UPDATE request. |
| */ |
| static pj_status_t handle_timer_response(pjsip_inv_session *inv, |
| const pjsip_rx_data *rdata, |
| pj_bool_t end_sess_on_failure) |
| { |
| pjsip_status_code st_code; |
| pj_status_t status; |
| |
| status = pjsip_timer_process_resp(inv, rdata, &st_code); |
| if (status != PJ_SUCCESS && end_sess_on_failure) { |
| pjsip_tx_data *tdata; |
| pj_status_t status2; |
| |
| status2 = pjsip_inv_end_session(inv, st_code, NULL, &tdata); |
| if (tdata && status2 == PJ_SUCCESS) |
| pjsip_inv_send_msg(inv, tdata); |
| } |
| |
| return status; |
| } |
| |
| /* |
| * Module on_rx_response(). |
| * |
| * This callback is called for these events: |
| * - dialog distributes incoming 2xx response to INVITE (outside |
| * transaction) to its usages. |
| * - endpoint distributes strayed responses. |
| */ |
| static pj_bool_t mod_inv_on_rx_response(pjsip_rx_data *rdata) |
| { |
| pjsip_dialog *dlg; |
| pjsip_inv_session *inv; |
| pjsip_msg *msg = rdata->msg_info.msg; |
| |
| dlg = pjsip_rdata_get_dlg(rdata); |
| |
| /* Ignore responses outside dialog */ |
| if (dlg == NULL) |
| return PJ_FALSE; |
| |
| /* Ignore responses not belonging to invite session */ |
| inv = pjsip_dlg_get_inv_session(dlg); |
| if (inv == NULL) |
| return PJ_FALSE; |
| |
| /* This MAY be retransmission of 2xx response to INVITE. |
| * If it is, we need to send ACK. |
| */ |
| if (msg->type == PJSIP_RESPONSE_MSG && msg->line.status.code/100==2 && |
| rdata->msg_info.cseq->method.id == PJSIP_INVITE_METHOD && |
| inv->invite_tsx == NULL) |
| { |
| pjsip_event e; |
| |
| PJSIP_EVENT_INIT_RX_MSG(e, rdata); |
| inv_send_ack(inv, &e); |
| return PJ_TRUE; |
| |
| } |
| |
| /* No other processing needs to be done here. */ |
| return PJ_FALSE; |
| } |
| |
| /* |
| * Module on_tsx_state() |
| * |
| * This callback is called by dialog framework for all transactions |
| * inside the dialog for all its dialog usages. |
| */ |
| static void mod_inv_on_tsx_state(pjsip_transaction *tsx, pjsip_event *e) |
| { |
| pjsip_dialog *dlg; |
| pjsip_inv_session *inv; |
| |
| dlg = pjsip_tsx_get_dlg(tsx); |
| if (dlg == NULL) |
| return; |
| |
| inv = pjsip_dlg_get_inv_session(dlg); |
| if (inv == NULL) |
| return; |
| |
| /* Call state handler for the invite session. */ |
| (*inv_state_handler[inv->state])(inv, e); |
| |
| /* Call on_tsx_state. CANCEL request is a special case and has been |
| * reported earlier in inv_respond_incoming_cancel() |
| */ |
| if (mod_inv.cb.on_tsx_state_changed && inv->notify && |
| !(tsx->method.id==PJSIP_CANCEL_METHOD && |
| e->body.tsx_state.type==PJSIP_EVENT_RX_MSG)) |
| { |
| (*mod_inv.cb.on_tsx_state_changed)(inv, tsx, e); |
| } |
| |
| /* Clear invite transaction when tsx is confirmed. |
| * Previously we set invite_tsx to NULL only when transaction has |
| * terminated, but this didn't work when ACK has the same Via branch |
| * value as the INVITE (see http://www.pjsip.org/trac/ticket/113) |
| */ |
| if (tsx->state>=PJSIP_TSX_STATE_CONFIRMED && tsx == inv->invite_tsx) { |
| inv->invite_tsx = NULL; |
| if (inv->last_answer) { |
| pjsip_tx_data_dec_ref(inv->last_answer); |
| inv->last_answer = NULL; |
| } |
| } |
| } |
| |
| |
| /* |
| * Initialize the invite module. |
| */ |
| PJ_DEF(pj_status_t) pjsip_inv_usage_init( pjsip_endpoint *endpt, |
| const pjsip_inv_callback *cb) |
| { |
| pj_status_t status; |
| |
| /* Check arguments. */ |
| PJ_ASSERT_RETURN(endpt && cb, PJ_EINVAL); |
| |
| /* Some callbacks are mandatory */ |
| PJ_ASSERT_RETURN(cb->on_state_changed && cb->on_new_session, PJ_EINVAL); |
| |
| /* Check if module already registered. */ |
| PJ_ASSERT_RETURN(mod_inv.mod.id == -1, PJ_EINVALIDOP); |
| |
| /* Copy param. */ |
| pj_memcpy(&mod_inv.cb, cb, sizeof(pjsip_inv_callback)); |
| |
| mod_inv.endpt = endpt; |
| |
| /* Register the module. */ |
| status = pjsip_endpt_register_module(endpt, &mod_inv.mod); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Get the instance of invite module. |
| */ |
| PJ_DEF(pjsip_module*) pjsip_inv_usage_instance(void) |
| { |
| return &mod_inv.mod; |
| } |
| |
| |
| |
| /* |
| * Return the invite session for the specified dialog. |
| */ |
| PJ_DEF(pjsip_inv_session*) pjsip_dlg_get_inv_session(pjsip_dialog *dlg) |
| { |
| return (pjsip_inv_session*) dlg->mod_data[mod_inv.mod.id]; |
| } |
| |
| |
| /* |
| * Get INVITE state name. |
| */ |
| PJ_DEF(const char *) pjsip_inv_state_name(pjsip_inv_state state) |
| { |
| PJ_ASSERT_RETURN(state >= PJSIP_INV_STATE_NULL && |
| state <= PJSIP_INV_STATE_DISCONNECTED, |
| "??"); |
| |
| return inv_state_names[state]; |
| } |
| |
| /* |
| * Create UAC invite session. |
| */ |
| PJ_DEF(pj_status_t) pjsip_inv_create_uac( pjsip_dialog *dlg, |
| const pjmedia_sdp_session *local_sdp, |
| unsigned options, |
| pjsip_inv_session **p_inv) |
| { |
| pjsip_inv_session *inv; |
| pj_status_t status; |
| |
| /* Verify arguments. */ |
| PJ_ASSERT_RETURN(dlg && p_inv, PJ_EINVAL); |
| |
| /* Must lock dialog first */ |
| 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_UAC; |
| inv->state = PJSIP_INV_STATE_NULL; |
| inv->dlg = dlg; |
| inv->options = options; |
| inv->notify = PJ_TRUE; |
| inv->cause = (pjsip_status_code) 0; |
| |
| /* Create flip-flop pool (see ticket #877) */ |
| /* (using inv->obj_name as temporary variable for pool names */ |
| pj_ansi_snprintf(inv->obj_name, PJ_MAX_OBJ_NAME, "inv%p", dlg->pool); |
| inv->pool_prov = pjsip_endpt_create_pool(dlg->endpt, inv->obj_name, |
| POOL_INIT_SIZE, POOL_INC_SIZE); |
| inv->pool_active = pjsip_endpt_create_pool(dlg->endpt, inv->obj_name, |
| POOL_INIT_SIZE, POOL_INC_SIZE); |
| |
| /* 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(inv->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); |
| |
| /* Create 100rel handler */ |
| pjsip_100rel_attach(inv); |
| |
| /* 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; |
| } |
| |
| PJ_DEF(pjsip_rdata_sdp_info*) pjsip_rdata_get_sdp_info(pjsip_rx_data *rdata) |
| { |
| pjsip_rdata_sdp_info *sdp_info; |
| pjsip_msg_body *body = rdata->msg_info.msg->body; |
| pjsip_ctype_hdr *ctype_hdr = rdata->msg_info.ctype; |
| pjsip_media_type app_sdp; |
| |
| sdp_info = (pjsip_rdata_sdp_info*) |
| rdata->endpt_info.mod_data[mod_inv.mod.id]; |
| if (sdp_info) |
| return sdp_info; |
| |
| sdp_info = PJ_POOL_ZALLOC_T(rdata->tp_info.pool, |
| pjsip_rdata_sdp_info); |
| PJ_ASSERT_RETURN(mod_inv.mod.id >= 0, sdp_info); |
| rdata->endpt_info.mod_data[mod_inv.mod.id] = sdp_info; |
| |
| pjsip_media_type_init2(&app_sdp, "application", "sdp"); |
| |
| if (body && ctype_hdr && |
| pj_stricmp(&ctype_hdr->media.type, &app_sdp.type)==0 && |
| pj_stricmp(&ctype_hdr->media.subtype, &app_sdp.subtype)==0) |
| { |
| sdp_info->body.ptr = (char*)body->data; |
| sdp_info->body.slen = body->len; |
| } else if (body && ctype_hdr && |
| pj_stricmp2(&ctype_hdr->media.type, "multipart")==0 && |
| (pj_stricmp2(&ctype_hdr->media.subtype, "mixed")==0 || |
| pj_stricmp2(&ctype_hdr->media.subtype, "alternative")==0)) |
| { |
| pjsip_multipart_part *part; |
| |
| part = pjsip_multipart_find_part(body, &app_sdp, NULL); |
| if (part) { |
| sdp_info->body.ptr = (char*)part->body->data; |
| sdp_info->body.slen = part->body->len; |
| } |
| } |
| |
| if (sdp_info->body.ptr) { |
| pj_status_t status; |
| status = pjmedia_sdp_parse(rdata->tp_info.pool, |
| sdp_info->body.ptr, |
| sdp_info->body.slen, |
| &sdp_info->sdp); |
| if (status == PJ_SUCCESS) |
| status = pjmedia_sdp_validate2(sdp_info->sdp, PJ_FALSE); |
| |
| if (status != PJ_SUCCESS) { |
| sdp_info->sdp = NULL; |
| PJ_PERROR(1,(THIS_FILE, status, |
| "Error parsing/validating SDP body")); |
| } |
| |
| sdp_info->sdp_err = status; |
| } |
| |
| return sdp_info; |
| } |
| |
| |
| /* |
| * Verify incoming INVITE request. |
| */ |
| PJ_DEF(pj_status_t) pjsip_inv_verify_request3(pjsip_rx_data *rdata, |
| pj_pool_t *tmp_pool, |
| unsigned *options, |
| const pjmedia_sdp_session *r_sdp, |
| const pjmedia_sdp_session *l_sdp, |
| pjsip_dialog *dlg, |
| pjsip_endpoint *endpt, |
| pjsip_tx_data **p_tdata) |
| { |
| pjsip_msg *msg = NULL; |
| pjsip_allow_hdr *allow = NULL; |
| pjsip_supported_hdr *sup_hdr = NULL; |
| pjsip_require_hdr *req_hdr = NULL; |
| pjsip_contact_hdr *c_hdr = NULL; |
| int code = 200; |
| unsigned rem_option = 0; |
| pj_status_t status = PJ_SUCCESS; |
| pjsip_hdr res_hdr_list; |
| pjsip_rdata_sdp_info *sdp_info; |
| |
| /* Init return arguments. */ |
| if (p_tdata) *p_tdata = NULL; |
| |
| /* Verify arguments. */ |
| PJ_ASSERT_RETURN(tmp_pool != 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; |
| if (*options & PJSIP_INV_REQUIRE_ICE) |
| *options |= PJSIP_INV_SUPPORT_ICE; |
| |
| if (rdata) { |
| /* Get the message in rdata */ |
| msg = rdata->msg_info.msg; |
| |
| /* Must be INVITE request. */ |
| PJ_ASSERT_RETURN(msg && 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 Contact header */ |
| if (msg) { |
| c_hdr = (pjsip_contact_hdr*) |
| pjsip_msg_find_hdr(msg, PJSIP_H_CONTACT, NULL); |
| } |
| if (msg && (!c_hdr || !c_hdr->uri)) { |
| /* Missing Contact header or Contact contains "*" */ |
| pjsip_warning_hdr *w; |
| pj_str_t warn_text; |
| |
| warn_text = pj_str("Bad/missing Contact header"); |
| w = pjsip_warning_hdr_create(tmp_pool, 399, |
| pjsip_endpt_name(endpt), |
| &warn_text); |
| if (w) { |
| pj_list_push_back(&res_hdr_list, w); |
| } |
| |
| code = PJSIP_SC_BAD_REQUEST; |
| status = PJSIP_ERRNO_FROM_SIP_STATUS(code); |
| goto on_return; |
| } |
| |
| /* Check the request body, see if it's something that we support, |
| * only when the body hasn't been parsed before. |
| */ |
| if (r_sdp == NULL && rdata) { |
| sdp_info = pjsip_rdata_get_sdp_info(rdata); |
| } else { |
| sdp_info = NULL; |
| } |
| |
| if (r_sdp==NULL && msg && msg->body) { |
| |
| /* Check if body really contains SDP. */ |
| if (sdp_info->body.ptr == NULL) { |
| /* Couldn't find "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(tmp_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; |
| } |
| |
| if (sdp_info->sdp_err != 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(tmp_pool, |
| pjsip_endpt_name(endpt), |
| sdp_info->sdp_err); |
| PJ_ASSERT_RETURN(w, PJ_ENOMEM); |
| |
| pj_list_push_back(&res_hdr_list, w); |
| } |
| |
| goto on_return; |
| } |
| |
| r_sdp = sdp_info->sdp; |
| } |
| |
| if (r_sdp) { |
| /* 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( |
| tmp_pool, l_sdp, r_sdp, &neg); |
| PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| |
| /* Negotiate SDP */ |
| status = pjmedia_sdp_neg_negotiate(tmp_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( |
| tmp_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(tmp_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. |
| */ |
| if (msg) { |
| 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 */ |
| if (msg) { |
| sup_hdr = (pjsip_supported_hdr*) |
| pjsip_msg_find_hdr(msg, PJSIP_H_SUPPORTED, NULL); |
| } |
| if (sup_hdr) { |
| unsigned i; |
| const pj_str_t STR_100REL = { "100rel", 6}; |
| const pj_str_t STR_TIMER = { "timer", 5}; |
| const pj_str_t STR_ICE = { "ice", 3 }; |
| |
| 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; |
| else if (pj_stricmp(&sup_hdr->values[i], &STR_ICE)==0) |
| rem_option |= PJSIP_INV_SUPPORT_ICE; |
| } |
| } |
| |
| /* Check Require header */ |
| if (msg) { |
| 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_REPLACES = { "replaces", 8 }; |
| const pj_str_t STR_TIMER = { "timer", 5 }; |
| const pj_str_t STR_ICE = { "ice", 3 }; |
| 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 if ((*options & PJSIP_INV_SUPPORT_ICE) && |
| pj_stricmp(&req_hdr->values[i], &STR_ICE)==0) |
| { |
| rem_option |= PJSIP_INV_REQUIRE_ICE; |
| |
| } else if (!pjsip_endpt_has_capability(endpt, PJSIP_H_SUPPORTED, |
| NULL, &req_hdr->values[i])) |
| { |
| /* 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(tmp_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(tmp_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 ( msg && (((*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(tmp_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(tmp_pool, h); |
| pj_list_push_back(&res_hdr_list, sup_hdr); |
| } |
| |
| } |
| |
| goto on_return; |
| } |
| |
| /* If remote Require something that we support, make us Require |
| * that feature too. |
| */ |
| if (rem_option & PJSIP_INV_REQUIRE_100REL) { |
| pj_assert(*options & PJSIP_INV_SUPPORT_100REL); |
| *options |= PJSIP_INV_REQUIRE_100REL; |
| } |
| if (rem_option & PJSIP_INV_REQUIRE_TIMER) { |
| pj_assert(*options & PJSIP_INV_SUPPORT_TIMER); |
| *options |= PJSIP_INV_REQUIRE_TIMER; |
| } |
| |
| on_return: |
| |
| /* Create response if necessary */ |
| if (code != 200 && p_tdata) { |
| pjsip_tx_data *tdata; |
| const pjsip_hdr *h; |
| |
| if (!rdata) { |
| return PJSIP_ERRNO_FROM_SIP_STATUS(code); |
| } |
| |
| 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; |
| } |
| |
| |
| /* |
| * Verify incoming INVITE request. |
| */ |
| PJ_DEF(pj_status_t) pjsip_inv_verify_request2(pjsip_rx_data *rdata, |
| unsigned *options, |
| const pjmedia_sdp_session *r_sdp, |
| const pjmedia_sdp_session *l_sdp, |
| pjsip_dialog *dlg, |
| pjsip_endpoint *endpt, |
| pjsip_tx_data **p_tdata) |
| { |
| return pjsip_inv_verify_request3(rdata, rdata->tp_info.pool, |
| options, r_sdp, l_sdp, dlg, |
| endpt, p_tdata); |
| } |
| |
| |
| /* |
| * 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) |
| { |
| return pjsip_inv_verify_request3(rdata, rdata->tp_info.pool, |
| options, NULL, l_sdp, dlg, |
| endpt, p_tdata); |
| } |
| |
| /* |
| * 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; |
| pjsip_rdata_sdp_info *sdp_info; |
| 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; |
| |
| /* Create flip-flop pool (see ticket #877) */ |
| /* (using inv->obj_name as temporary variable for pool names */ |
| pj_ansi_snprintf(inv->obj_name, PJ_MAX_OBJ_NAME, "inv%p", dlg->pool); |
| inv->pool_prov = pjsip_endpt_create_pool(dlg->endpt, inv->obj_name, |
| POOL_INIT_SIZE, POOL_INC_SIZE); |
| inv->pool_active = pjsip_endpt_create_pool(dlg->endpt, inv->obj_name, |
| POOL_INIT_SIZE, POOL_INC_SIZE); |
| |
| /* Object name will use the same dialog pointer. */ |
| pj_ansi_snprintf(inv->obj_name, PJ_MAX_OBJ_NAME, "inv%p", dlg); |
| |
| /* Process SDP in message body, if present. */ |
| sdp_info = pjsip_rdata_get_sdp_info(rdata); |
| if (sdp_info->sdp_err) { |
| pjsip_dlg_dec_lock(dlg); |
| return sdp_info->sdp_err; |
| } |
| |
| /* Create negotiator. */ |
| if (sdp_info->sdp) { |
| status = pjmedia_sdp_neg_create_w_remote_offer(inv->pool, local_sdp, |
| sdp_info->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; |
| |
| /* Create 100rel handler */ |
| if (inv->options & PJSIP_INV_REQUIRE_100REL) { |
| pjsip_100rel_attach(inv); |
| } |
| |
| /* 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; |
| } |
| |
| |
| /* |
| * Restart UAC session, possibly because app or us wants to re-send the |
| * INVITE request due to 401/407 challenge or 3xx response. |
| */ |
| PJ_DEF(pj_status_t) pjsip_inv_uac_restart(pjsip_inv_session *inv, |
| pj_bool_t new_offer) |
| { |
| PJ_ASSERT_RETURN(inv, PJ_EINVAL); |
| |
| inv->state = PJSIP_INV_STATE_NULL; |
| inv->invite_tsx = NULL; |
| if (inv->last_answer) { |
| pjsip_tx_data_dec_ref(inv->last_answer); |
| inv->last_answer = NULL; |
| } |
| |
| if (new_offer && inv->neg) { |
| pjmedia_sdp_neg_state neg_state; |
| |
| 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); |
| } |
| } |
| |
| 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); |
| |
| pjsip_media_type_init(&body->content_type, (pj_str_t*)&STR_APPLICATION, |
| (pj_str_t*)&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) { |
| pjsip_tx_data_dec_ref(tdata); |
| 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. */ |
| if ((inv->options & PJSIP_INV_REQUIRE_100REL) || |
| (inv->options & PJSIP_INV_REQUIRE_TIMER)) |
| { |
| pjsip_require_hdr *hreq; |
| |
| hreq = pjsip_require_hdr_create(tdata->pool); |
| |
| if (inv->options & PJSIP_INV_REQUIRE_100REL) |
| hreq->values[hreq->count++] = pj_str("100rel"); |
| if (inv->options & PJSIP_INV_REQUIRE_TIMER) |
| hreq->values[hreq->count++] = pj_str("timer"); |
| |
| pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*) hreq); |
| } |
| |
| status = pjsip_timer_update_req(inv, tdata); |
| if (status != PJ_SUCCESS) |
| goto on_return; |
| |
| /* Done. */ |
| *p_tdata = tdata; |
| |
| |
| on_return: |
| pjsip_dlg_dec_lock(inv->dlg); |
| return status; |
| } |
| |
| |
| /* Util: swap pool */ |
| static void swap_pool(pj_pool_t **p1, pj_pool_t **p2) |
| { |
| pj_pool_t *tmp = *p1; |
| *p1 = *p2; |
| *p2 = tmp; |
| } |
| |
| |
| /* |
| * Initiate SDP negotiation in the SDP negotiator. |
| */ |
| 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_prov, 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); |
| |
| /* Invite session may have been terminated by the application even |
| * after a successful SDP negotiation, for example when no audio |
| * codec is present in the offer (see ticket #1034). |
| */ |
| if (inv->state != PJSIP_INV_STATE_DISCONNECTED) { |
| |
| /* Swap the flip-flop pool when SDP negotiation success. */ |
| if (status == PJ_SUCCESS) { |
| swap_pool(&inv->pool_prov, &inv->pool_active); |
| } |
| |
| /* Reset the provisional pool regardless SDP negotiation result. */ |
| pj_pool_reset(inv->pool_prov); |
| |
| } else { |
| |
| status = PJSIP_ERRNO_FROM_SIP_STATUS(inv->cause); |
| } |
| |
| 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; |
| pj_status_t status; |
| pjsip_msg *msg; |
| pjsip_rdata_sdp_info *sdp_info; |
| |
| /* 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; |
| } |
| |
| sdp_info = pjsip_rdata_get_sdp_info(rdata); |
| if (sdp_info->body.ptr == NULL) { |
| /* Message body is not "application/sdp" */ |
| return PJMEDIA_SDP_EINSDP; |
| } |
| |
| /* 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, |
| * EXCEPT if: |
| * - this is an initial UAC INVITE transaction (i.e. not re-INVITE), and |
| * - the previous negotiation was done on an early media (18x) and |
| * this response is a final/2xx response, and |
| * - the 2xx response has different To tag than the 18x response |
| * (i.e. the request has forked). |
| * |
| * The exception above is to add a rudimentary support for early media |
| * forking (sample case: custom ringback). See this ticket for more |
| * info: http://trac.pjsip.org/repos/ticket/657 |
| */ |
| if (tsx_inv_data->sdp_done) { |
| pj_str_t res_tag; |
| int st_code; |
| |
| res_tag = rdata->msg_info.to->tag; |
| st_code = rdata->msg_info.msg->line.status.code; |
| |
| /* Allow final/early response after SDP has been negotiated in early |
| * media, IF this response is a final/early response with different |
| * tag. |
| */ |
| if (tsx->role == PJSIP_ROLE_UAC && |
| (st_code/100 == 2 || |
| (st_code==183 && pjsip_cfg()->endpt.follow_early_media_fork)) && |
| tsx_inv_data->done_early && |
| pj_stricmp(&tsx_inv_data->done_tag, &res_tag)) |
| { |
| const pjmedia_sdp_session *reoffer_sdp = NULL; |
| |
| PJ_LOG(4,(inv->obj_name, "Received forked %s response " |
| "after SDP negotiation has been done in early " |
| "media. Renegotiating SDP..", |
| (st_code==183? "early" : "final" ))); |
| |
| /* Retrieve original SDP offer from INVITE request */ |
| reoffer_sdp = (const pjmedia_sdp_session*) |
| tsx->last_tx->msg->body->data; |
| |
| /* Feed the original offer to negotiator */ |
| status = pjmedia_sdp_neg_modify_local_offer2(inv->pool_prov, |
| inv->neg, |
| inv->sdp_neg_flags, |
| reoffer_sdp); |
| if (status != PJ_SUCCESS) { |
| PJ_LOG(1,(inv->obj_name, "Error updating local offer for " |
| "forked 2xx/183 response (err=%d)", status)); |
| return status; |
| } |
| |
| } else { |
| |
| if (rdata->msg_info.msg->body) { |
| PJ_LOG(4,(inv->obj_name, "SDP negotiation done, message " |
| "body is ignored")); |
| } |
| return PJ_SUCCESS; |
| } |
| } |
| |
| /* Process the SDP body. */ |
| if (sdp_info->sdp_err) { |
| PJ_PERROR(4,(THIS_FILE, sdp_info->sdp_err, |
| "Error parsing SDP in %s", |
| pjsip_rx_data_get_info(rdata))); |
| return PJMEDIA_SDP_EINSDP; |
| } |
| |
| pj_assert(sdp_info->sdp != NULL); |
| |
| /* 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_info->sdp, |
| &inv->neg); |
| } else { |
| status=pjmedia_sdp_neg_set_remote_offer(inv->pool_prov, inv->neg, |
| sdp_info->sdp); |
| } |
| |
| if (status != PJ_SUCCESS) { |
| PJ_PERROR(4,(THIS_FILE, status, "Error processing SDP offer in %", |
| pjsip_rx_data_get_info(rdata))); |
| 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_info->sdp); |
| |
| } |
| |
| /* application must have supplied an answer at this point. */ |
| if (pjmedia_sdp_neg_get_state(inv->neg) != |
| PJMEDIA_SDP_NEG_STATE_WAIT_NEGO) |
| { |
| if (mod_inv.cb.on_rx_reinvite && inv->notify && |
| msg->type == PJSIP_REQUEST_MSG && |
| msg->line.req.method.id == PJSIP_INVITE_METHOD) |
| { |
| /* Do not return failure first, allow the application |
| * to set the answer in the on_rx_reinvite() callback. |
| */ |
| PJ_LOG(5,(inv->obj_name, "Ignoring on_rx_offer() status " |
| "because on_rx_reinvite() is implemented")); |
| return PJ_SUCCESS; |
| } |
| return PJ_EINVALIDOP; |
| } |
| |
| } else if (pjmedia_sdp_neg_get_state(inv->neg) == |
| PJMEDIA_SDP_NEG_STATE_LOCAL_OFFER) |
| { |
| int status_code; |
| |
| /* 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_prov, inv->neg, |
| sdp_info->sdp); |
| |
| if (status != PJ_SUCCESS) { |
| PJ_PERROR(4,(THIS_FILE, status, "Error processing SDP answer in %s", |
| pjsip_rx_data_get_info(rdata))); |
| return PJMEDIA_SDP_EINSDP; |
| } |
| |
| /* Negotiate SDP */ |
| |
| inv_negotiate_sdp(inv); |
| |
| /* Mark this transaction has having SDP offer/answer done, and |
| * save the reference to the To tag |
| */ |
| |
| tsx_inv_data->sdp_done = 1; |
| status_code = rdata->msg_info.msg->line.status.code; |
| tsx_inv_data->done_early = (status_code/100==1); |
| pj_strdup(tsx->pool, &tsx_inv_data->done_tag, |
| &rdata->msg_info.to->tag); |
| |
| } 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_prov, 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. |
| * |
| * Note note: |
| * - When offer/answer has been completed in reliable 183, we MUST NOT |
| * send SDP in 2xx response. So if we don't have SDP to send, clear |
| * the SDP in the message body ONLY if 100rel is active in this |
| * session. |
| */ |
| if (sdp) { |
| tdata->msg->body = create_sdp_body(tdata->pool, sdp); |
| } else { |
| if (inv->options & PJSIP_INV_REQUIRE_100REL) { |
| tdata->msg->body = NULL; |
| } |
| } |
| |
| /* Cancel SDP negotiation if this is a negative reply to a re-INVITE */ |
| if (st_code >= 300 && inv->neg != NULL && |
| inv->state == PJSIP_INV_STATE_CONFIRMED) |
| { |
| pjmedia_sdp_neg_state neg_state; |
| neg_state = pjmedia_sdp_neg_get_state(inv->neg); |
| if (neg_state == PJMEDIA_SDP_NEG_STATE_REMOTE_OFFER) { |
| pjmedia_sdp_neg_cancel_offer(inv->neg); |
| } |
| } |
| |
| 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; |
| pjsip_status_code st_code2; |
| |
| /* Verify arguments. */ |
| PJ_ASSERT_RETURN(inv && p_tdata, PJ_EINVAL); |
| |
| /* Must have INVITE transaction. */ |
| PJ_ASSERT_RETURN(inv->invite_tsx, PJ_EBUG); |
| |
| pj_log_push_indent(); |
| |
| 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; |
| |
| /* Invoke Session Timers module */ |
| status = pjsip_timer_process_req(inv, rdata, &st_code2); |
| if (status != PJ_SUCCESS) { |
| pj_status_t status2; |
| |
| status2 = pjsip_dlg_modify_response(inv->dlg, tdata, st_code2, NULL); |
| if (status2 != PJ_SUCCESS) { |
| pjsip_tx_data_dec_ref(tdata); |
| goto on_return; |
| } |
| status2 = pjsip_timer_update_resp(inv, tdata); |
| if (status2 == PJ_SUCCESS) |
| *p_tdata = tdata; |
| else |
| pjsip_tx_data_dec_ref(tdata); |
| |
| 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; |
| } |
| |
| /* Save this answer */ |
| inv->last_answer = tdata; |
| pjsip_tx_data_add_ref(inv->last_answer); |
| PJ_LOG(5,(inv->dlg->obj_name, "Initial answer %s", |
| pjsip_tx_data_get_info(inv->last_answer))); |
| |
| /* Invoke Session Timers */ |
| pjsip_timer_update_resp(inv, tdata); |
| |
| *p_tdata = tdata; |
| |
| on_return: |
| pjsip_dlg_dec_lock(inv->dlg); |
| pj_log_pop_indent(); |
| return status; |
| } |
| |
| |
| /* |
| * Answer INVITE request. |
| */ |
| 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); |
| |
| /* Must have created an answer before */ |
| PJ_ASSERT_RETURN(inv->last_answer, PJ_EINVALIDOP); |
| |
| pj_log_push_indent(); |
| |
| pjsip_dlg_inc_lock(inv->dlg); |
| |
| /* Modify last response. */ |
| last_res = inv->last_answer; |
| status = pjsip_dlg_modify_response(inv->dlg, last_res, st_code, st_text); |
| if (status != PJ_SUCCESS) |
| goto on_return; |
| |
| /* For non-2xx final response, strip message body */ |
| if (st_code >= 300) { |
| last_res->msg->body = NULL; |
| } |
| |
| /* 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; |
| } |
| |
| /* Invoke Session Timers */ |
| pjsip_timer_update_resp(inv, last_res); |
| |
| *p_tdata = last_res; |
| |
| on_return: |
| pjsip_dlg_dec_lock(inv->dlg); |
| pj_log_pop_indent(); |
| return status; |
| } |
| |
| |
| /* |
| * Set local SDP offer/answer. |
| */ |
| PJ_DEF(pj_status_t) pjsip_inv_set_local_sdp(pjsip_inv_session *inv, |
| const pjmedia_sdp_session *sdp ) |
| { |
| const pjmedia_sdp_session *offer; |
| pj_status_t status; |
| |
| PJ_ASSERT_RETURN(inv && sdp, PJ_EINVAL); |
| |
| /* If we have remote SDP offer, set local answer to respond to the offer, |
| * otherwise we set/modify our local offer (and create an SDP negotiator |
| * if we don't have one yet). |
| */ |
| if (inv->neg) { |
| pjmedia_sdp_neg_state neg_state = pjmedia_sdp_neg_get_state(inv->neg); |
| |
| if ((neg_state == PJMEDIA_SDP_NEG_STATE_REMOTE_OFFER || |
| neg_state == PJMEDIA_SDP_NEG_STATE_WAIT_NEGO) && |
| pjmedia_sdp_neg_get_neg_remote(inv->neg, &offer) == PJ_SUCCESS) |
| { |
| status = pjsip_inv_set_sdp_answer(inv, sdp); |
| } else if (neg_state == PJMEDIA_SDP_NEG_STATE_DONE) { |
| status = pjmedia_sdp_neg_modify_local_offer2(inv->pool, inv->neg, |
| inv->sdp_neg_flags, |
| sdp); |
| } else |
| return PJMEDIA_SDPNEG_EINSTATE; |
| } else { |
| status = pjmedia_sdp_neg_create_w_local_offer(inv->pool, |
| sdp, &inv->neg); |
| } |
| |
| 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_prov, 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); |
| |
| pj_log_push_indent(); |
| |
| /* 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) { |
| |
| /* Do not stop INVITE retransmission, see ticket #506 */ |
| //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, "Delaying CANCEL since no " |
| "provisional response is received yet")); |
| pj_log_pop_indent(); |
| 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); |
| if (status != PJ_SUCCESS) { |
| pj_log_pop_indent(); |
| return status; |
| } |
| |
| /* Set timeout for the INVITE transaction, in case UAS is not |
| * able to respond the INVITE with 487 final response. The |
| * timeout value is 64*T1. |
| */ |
| pjsip_tsx_set_timeout(inv->invite_tsx, 64 * pjsip_cfg()->tsx.t1); |
| |
| } 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: |
| /* End Session Timer */ |
| pjsip_timer_end_session(inv); |
| |
| /* 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. */ |
| pj_log_pop_indent(); |
| return PJSIP_ESESSIONTERMINATED; |
| |
| default: |
| pj_assert(!"Invalid operation!"); |
| pj_log_pop_indent(); |
| return PJ_EINVALIDOP; |
| } |
| |
| if (status != PJ_SUCCESS) { |
| pj_log_pop_indent(); |
| return status; |
| } |
| |
| |
| /* Done */ |
| |
| inv->cancelling = PJ_TRUE; |
| *p_tdata = tdata; |
| |
| pj_log_pop_indent(); |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Cancel re-INVITE transaction. |
| */ |
| PJ_DEF(pj_status_t) pjsip_inv_cancel_reinvite( pjsip_inv_session *inv, |
| pjsip_tx_data **p_tdata ) |
| { |
| pjsip_tx_data *tdata; |
| pj_status_t status; |
| |
| /* Verify arguments. */ |
| PJ_ASSERT_RETURN(inv && p_tdata, PJ_EINVAL); |
| |
| pj_log_push_indent(); |
| |
| /* Create appropriate message. */ |
| switch (inv->state) { |
| case PJSIP_INV_STATE_CONFIRMED: |
| /* MUST have the original UAC INVITE transaction */ |
| PJ_ASSERT_RETURN(inv->invite_tsx != NULL, PJ_EBUG); |
| |
| /* CANCEL should only be called when we have received a |
| * provisional response. |
| */ |
| if (inv->invite_tsx->status_code < 100) { |
| inv->cancelling = PJ_TRUE; |
| inv->pending_cancel = PJ_TRUE; |
| *p_tdata = NULL; |
| PJ_LOG(4, (inv->obj_name, "Delaying CANCEL since no " |
| "provisional response is received yet")); |
| pj_log_pop_indent(); |
| return PJ_SUCCESS; |
| } |
| |
| status = pjsip_endpt_create_cancel(inv->dlg->endpt, |
| inv->invite_tsx->last_tx, |
| &tdata); |
| if (status != PJ_SUCCESS) { |
| pj_log_pop_indent(); |
| return status; |
| } |
| break; |
| |
| default: |
| /* We cannot send CANCEL to a re-INVITE if the INVITE session is |
| * not confirmed. |
| */ |
| pj_log_pop_indent(); |
| return PJ_EINVALIDOP; |
| } |
| |
| pj_log_pop_indent(); |
| |
| *p_tdata = tdata; |
| return PJ_SUCCESS; |
| } |
| |
| /* Following redirection recursion, get next target from the target set and |
| * notify user. |
| * |
| * Returns PJ_FALSE if recursion fails (either because there's no more target |
| * or user rejects the recursion). If we return PJ_FALSE, caller should |
| * disconnect the session. |
| * |
| * Note: |
| * the event 'e' argument may be NULL. |
| */ |
| static pj_bool_t inv_uac_recurse(pjsip_inv_session *inv, int code, |
| const pj_str_t *reason, pjsip_event *e) |
| { |
| pjsip_redirect_op op; |
| pjsip_target *target; |
| |
| /* Won't redirect if the callback is not implemented. */ |
| if (mod_inv.cb.on_redirected == NULL) |
| return PJ_FALSE; |
| |
| if (reason == NULL) |
| reason = pjsip_get_status_text(code); |
| |
| /* Set status of current target */ |
| pjsip_target_assign_status(inv->dlg->target_set.current, inv->dlg->pool, |
| code, reason); |
| |
| /* Fetch next target from the target set. We only want to |
| * process SIP/SIPS URI for now. |
| */ |
| for (;;) { |
| target = pjsip_target_set_get_next(&inv->dlg->target_set); |
| if (target == NULL) { |
| /* No more target. */ |
| return PJ_FALSE; |
| } |
| |
| if (!PJSIP_URI_SCHEME_IS_SIP(target->uri) && |
| !PJSIP_URI_SCHEME_IS_SIPS(target->uri)) |
| { |
| code = PJSIP_SC_UNSUPPORTED_URI_SCHEME; |
| reason = pjsip_get_status_text(code); |
| |
| /* Mark this target as unusable and fetch next target. */ |
| pjsip_target_assign_status(target, inv->dlg->pool, code, reason); |
| } else { |
| /* Found a target */ |
| break; |
| } |
| } |
| |
| /* We have target in 'target'. Set this target as current target |
| * and notify callback. |
| */ |
| pjsip_target_set_set_current(&inv->dlg->target_set, target); |
| |
| op = (*mod_inv.cb.on_redirected)(inv, target->uri, e); |
| |
| |
| /* Check what the application wants to do now */ |
| switch (op) { |
| case PJSIP_REDIRECT_ACCEPT: |
| case PJSIP_REDIRECT_ACCEPT_REPLACE: |
| case PJSIP_REDIRECT_STOP: |
| /* Must increment session counter, that's the convention of the |
| * pjsip_inv_process_redirect(). |
| */ |
| pjsip_dlg_inc_session(inv->dlg, &mod_inv.mod); |
| |
| /* Act on the recursion */ |
| pjsip_inv_process_redirect(inv, op, e); |
| return PJ_TRUE; |
| |
| case PJSIP_REDIRECT_PENDING: |
| /* Increment session so that the dialog/session is not destroyed |
| * while we're waiting for user confirmation. |
| */ |
| pjsip_dlg_inc_session(inv->dlg, &mod_inv.mod); |
| |
| /* Also clear the invite_tsx variable, otherwise when this tsx is |
| * terminated, it will also terminate the session. |
| */ |
| inv->invite_tsx = NULL; |
| |
| /* Done. The processing will continue once the application calls |
| * pjsip_inv_process_redirect(). |
| */ |
| return PJ_TRUE; |
| |
| case PJSIP_REDIRECT_REJECT: |
| /* Recursively call this function again to fetch next target, if any. |
| */ |
| return inv_uac_recurse(inv, PJSIP_SC_REQUEST_TERMINATED, NULL, e); |
| |
| } |
| |
| pj_assert(!"Should not reach here"); |
| return PJ_FALSE; |
| } |
| |
| |
| /* Process redirection/recursion */ |
| PJ_DEF(pj_status_t) pjsip_inv_process_redirect( pjsip_inv_session *inv, |
| pjsip_redirect_op op, |
| pjsip_event *e) |
| { |
| const pjsip_status_code cancel_code = PJSIP_SC_REQUEST_TERMINATED; |
| pjsip_event usr_event; |
| pj_status_t status = PJ_SUCCESS; |
| |
| PJ_ASSERT_RETURN(inv && op != PJSIP_REDIRECT_PENDING, PJ_EINVAL); |
| |
| if (e == NULL) { |
| PJSIP_EVENT_INIT_USER(usr_event, NULL, NULL, NULL, NULL); |
| e = &usr_event; |
| } |
| |
| pjsip_dlg_inc_lock(inv->dlg); |
| |
| /* Decrement session. That's the convention here to prevent the dialog |
| * or session from being destroyed while we're waiting for user |
| * confirmation. |
| */ |
| pjsip_dlg_dec_session(inv->dlg, &mod_inv.mod); |
| |
| /* See what the application wants to do now */ |
| switch (op) { |
| case PJSIP_REDIRECT_ACCEPT: |
| case PJSIP_REDIRECT_ACCEPT_REPLACE: |
| /* User accept the redirection. Reset the session and resend the |
| * INVITE request. |
| */ |
| { |
| pjsip_tx_data *tdata; |
| pjsip_via_hdr *via; |
| |
| /* Get the original INVITE request. */ |
| tdata = inv->invite_req; |
| pjsip_tx_data_add_ref(tdata); |
| |
| /* Restore strict route set. |
| * See http://trac.pjsip.org/repos/ticket/492 |
| */ |
| pjsip_restore_strict_route_set(tdata); |
| |
| /* Set target */ |
| tdata->msg->line.req.uri = (pjsip_uri*) |
| pjsip_uri_clone(tdata->pool, inv->dlg->target_set.current->uri); |
| |
| /* Remove branch param in Via header. */ |
| via = (pjsip_via_hdr*) |
| pjsip_msg_find_hdr(tdata->msg, PJSIP_H_VIA, NULL); |
| via->branch_param.slen = 0; |
| |
| /* Process PJSIP_REDIRECT_ACCEPT_REPLACE */ |
| if (op == PJSIP_REDIRECT_ACCEPT_REPLACE) { |
| pjsip_to_hdr *to; |
| pjsip_dialog *dlg = inv->dlg; |
| enum { TMP_LEN = 128 }; |
| char tmp[TMP_LEN]; |
| int len; |
| |
| /* Replace To header */ |
| to = PJSIP_MSG_TO_HDR(tdata->msg); |
| to->uri = (pjsip_uri*) |
| pjsip_uri_clone(tdata->pool, |
| dlg->target_set.current->uri); |
| to->tag.slen = 0; |
| pj_list_init(&to->other_param); |
| |
| /* Re-init dialog remote info */ |
| dlg->remote.info = (pjsip_to_hdr*) |
| pjsip_hdr_clone(dlg->pool, to); |
| |
| /* Remove header param from remote info */ |
| if (PJSIP_URI_SCHEME_IS_SIP(dlg->remote.info->uri) || |
| PJSIP_URI_SCHEME_IS_SIPS(dlg->remote.info->uri)) |
| { |
| pjsip_sip_uri *sip_uri = (pjsip_sip_uri *) |
| pjsip_uri_get_uri(dlg->remote.info->uri); |
| if (!pj_list_empty(&sip_uri->header_param)) { |
| /* Remove all header param */ |
| pj_list_init(&sip_uri->header_param); |
| } |
| } |
| |
| /* Print the remote info. */ |
| len = pjsip_uri_print(PJSIP_URI_IN_FROMTO_HDR, |
| dlg->remote.info->uri, tmp, TMP_LEN); |
| if (len < 1) { |
| pj_ansi_strcpy(tmp, "<-error: uri too long->"); |
| len = (int)pj_ansi_strlen(tmp); |
| } |
| pj_strdup2_with_null(dlg->pool, &dlg->remote.info_str, tmp); |
| |
| /* Secure? */ |
| dlg->secure = PJSIP_URI_SCHEME_IS_SIPS(to->uri); |
| } |
| |
| /* Reset message destination info (see #1248). */ |
| pj_bzero(&tdata->dest_info, sizeof(tdata->dest_info)); |
| |
| /* Must invalidate the message! */ |
| pjsip_tx_data_invalidate_msg(tdata); |
| |
| /* Reset the session */ |
| pjsip_inv_uac_restart(inv, PJ_FALSE); |
| |
| /* (re)Send the INVITE request */ |
| status = pjsip_inv_send_msg(inv, tdata); |
| } |
| break; |
| |
| case PJSIP_REDIRECT_STOP: |
| /* User doesn't want the redirection. Disconnect the session now. */ |
| inv_set_cause(inv, cancel_code, pjsip_get_status_text(cancel_code)); |
| inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e); |
| |
| /* Caller should expect that the invite session is gone now, so |
| * we don't need to set status to PJSIP_ESESSIONTERMINATED here. |
| */ |
| break; |
| |
| case PJSIP_REDIRECT_REJECT: |
| /* Current target is rejected. Fetch next target if any. */ |
| if (inv_uac_recurse(inv, cancel_code, NULL, NULL) == PJ_FALSE) { |
| inv_set_cause(inv, cancel_code, |
| pjsip_get_status_text(cancel_code)); |
| inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e); |
| |
| /* Tell caller that the invite session is gone now */ |
| status = PJSIP_ESESSIONTERMINATED; |
| } |
| break; |
| |
| |
| case PJSIP_REDIRECT_PENDING: |
| pj_assert(!"Should not happen"); |
| break; |
| } |
| |
| |
| pjsip_dlg_dec_lock(inv->dlg); |
| |
| return status; |
| } |
| |
| |
| /* |
| * 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; |
| |
| pj_log_push_indent(); |
| |
| 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_prov, |
| 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_offer2( |
| inv->pool_prov, inv->neg, |
| inv->sdp_neg_flags, 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); |
| pj_log_pop_indent(); |
| 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 *offer, |
| pjsip_tx_data **p_tdata ) |
| { |
| pjsip_contact_hdr *contact_hdr = NULL; |
| pjsip_tx_data *tdata = NULL; |
| pjmedia_sdp_session *sdp_copy; |
| const pjsip_hdr *hdr; |
| pj_status_t status = PJ_SUCCESS; |
| |
| /* Verify arguments. */ |
| PJ_ASSERT_RETURN(inv && p_tdata, PJ_EINVAL); |
| |
| /* Dialog must have been established */ |
| PJ_ASSERT_RETURN(inv->dlg->state == PJSIP_DIALOG_STATE_ESTABLISHED, |
| PJ_EINVALIDOP); |
| |
| /* Invite session must not have been disconnected */ |
| PJ_ASSERT_RETURN(inv->state < PJSIP_INV_STATE_DISCONNECTED, |
| PJ_EINVALIDOP); |
| |
| pj_log_push_indent(); |
| |
| /* Lock dialog. */ |
| pjsip_dlg_inc_lock(inv->dlg); |
| |
| /* Process offer, if any */ |
| if (offer) { |
| if (pjmedia_sdp_neg_get_state(inv->neg)!=PJMEDIA_SDP_NEG_STATE_DONE) { |
| PJ_LOG(4,(inv->dlg->obj_name, |
| "Invalid SDP offer/answer state for UPDATE")); |
| status = PJ_EINVALIDOP; |
| goto on_error; |
| } |
| |
| /* Notify negotiator about the new offer. This will fix the offer |
| * with correct SDP origin. |
| */ |
| status = pjmedia_sdp_neg_modify_local_offer2(inv->pool_prov, inv->neg, |
| inv->sdp_neg_flags, offer); |
| if (status != PJ_SUCCESS) |
| goto on_error; |
| |
| /* Retrieve the "fixed" offer from negotiator */ |
| pjmedia_sdp_neg_get_neg_local(inv->neg, &offer); |
| } |
| |
| /* Update Contact if required */ |
| 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_error; |
| } |
| |
| inv->dlg->local.contact = contact_hdr; |
| } |
| |
| /* Create request */ |
| status = pjsip_dlg_create_request(inv->dlg, &pjsip_update_method, |
| -1, &tdata); |
| if (status != PJ_SUCCESS) |
| goto on_error; |
| |
| /* Attach SDP body */ |
| if (offer) { |
| sdp_copy = pjmedia_sdp_session_clone(tdata->pool, offer); |
| pjsip_create_sdp_body(tdata->pool, sdp_copy, &tdata->msg->body); |
| } |
| |
| /* Session Timers spec (RFC 4028) says that Supported header MUST be put |
| * in refresh requests. So here we'll just put the Supported header in |
| * all cases regardless of whether session timers is used or not, just |
| * in case this is a common behavior. |
| */ |
| 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)); |
| } |
| |
| status = pjsip_timer_update_req(inv, tdata); |
| if (status != PJ_SUCCESS) |
| goto on_error; |
| |
| /* Unlock dialog. */ |
| pjsip_dlg_dec_lock(inv->dlg); |
| |
| *p_tdata = tdata; |
| |
| pj_log_pop_indent(); |
| return PJ_SUCCESS; |
| |
| on_error: |
| if (tdata) |
| pjsip_tx_data_dec_ref(tdata); |
| |
| /* Unlock dialog. */ |
| pjsip_dlg_dec_lock(inv->dlg); |
| |
| pj_log_pop_indent(); |
| return status; |
| } |
| |
| /* |
| * Create an ACK request. |
| */ |
| PJ_DEF(pj_status_t) pjsip_inv_create_ack(pjsip_inv_session *inv, |
| int cseq, |
| pjsip_tx_data **p_tdata) |
| { |
| const pjmedia_sdp_session *sdp = NULL; |
| pj_status_t status; |
| |
| PJ_ASSERT_RETURN(inv && p_tdata, PJ_EINVAL); |
| |
| /* Lock dialog. */ |
| pjsip_dlg_inc_lock(inv->dlg); |
| |
| /* Destroy last_ack */ |
| if (inv->last_ack) { |
| pjsip_tx_data_dec_ref(inv->last_ack); |
| inv->last_ack = NULL; |
| } |
| |
| /* Create new ACK request */ |
| status = pjsip_dlg_create_request(inv->dlg, pjsip_get_ack_method(), |
| cseq, &inv->last_ack); |
| if (status != PJ_SUCCESS) { |
| pjsip_dlg_dec_lock(inv->dlg); |
| return status; |
| } |
| |
| /* See if we have pending SDP answer to send */ |
| sdp = inv_has_pending_answer(inv, inv->invite_tsx); |
| if (sdp) { |
| inv->last_ack->msg->body = create_sdp_body(inv->last_ack->pool, sdp); |
| } |
| |
| /* Keep this for subsequent response retransmission */ |
| inv->last_ack_cseq = cseq; |
| pjsip_tx_data_add_ref(inv->last_ack); |
| |
| /* Done */ |
| *p_tdata = inv->last_ack; |
| |
| /* Unlock dialog. */ |
| pjsip_dlg_dec_lock(inv->dlg); |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * 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_push_indent(); |
| |
| 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); |
| |
| /* Check again that we didn't receive incoming re-INVITE */ |
| if (tdata->msg->line.req.method.id==PJSIP_INVITE_METHOD && |
| inv->invite_tsx) |
| { |
| pjsip_tx_data_dec_ref(tdata); |
| pjsip_dlg_dec_lock(inv->dlg); |
| status = PJ_EINVALIDOP; |
| goto on_error; |
| } |
| |
| /* Associate our data in outgoing invite transaction */ |
| 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) { |
| goto on_error; |
| } |
| |
| } 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); |
| |
| if (inv->options & PJSIP_INV_REQUIRE_100REL) { |
| status = pjsip_100rel_tx_response(inv, tdata); |
| } else |
| { |
| status = pjsip_dlg_send_response(inv->dlg, inv->invite_tsx, tdata); |
| } |
| |
| if (status != PJ_SUCCESS) { |
| goto on_error; |
| } |
| } |
| |
| /* Done */ |
| pj_log_pop_indent(); |
| return PJ_SUCCESS; |
| |
| on_error: |
| pj_log_pop_indent(); |
| return status; |
| } |
| |
| |
| /* |
| * Respond to incoming CANCEL request. |
| */ |
| static void inv_respond_incoming_cancel(pjsip_inv_session *inv, |
| pjsip_transaction *cancel_tsx, |
| pjsip_event *e) |
| { |
| pjsip_tx_data *tdata; |
| pjsip_transaction *invite_tsx; |
| pjsip_rx_data *rdata; |
| pj_str_t key; |
| pj_status_t status; |
| |
| pj_assert(e->body.tsx_state.type == PJSIP_EVENT_RX_MSG); |
| rdata = e->body.tsx_state.src.rdata; |
| |
| /* https://trac.pjsip.org/repos/ticket/1651 |
| * Special treatment for CANCEL. Since here we're responding to CANCEL |
| * automatically (including 487 to INVITE), application will see the |
| * 200/OK response to CANCEL first in the callback, and then 487 to |
| * INVITE, before the CANCEL request itself. And worse, pjsua application |
| * may not see the CANCEL request at all because by the time the CANCEL |
| * request is reported, call has been disconnected and further events |
| * from the INVITE session has been suppressed. |
| */ |
| if (mod_inv.cb.on_tsx_state_changed && inv->notify) |
| (*mod_inv.cb.on_tsx_state_changed)(inv, cancel_tsx, e); |
| |
| /* 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 481 (RFC 3261 Section 9.2 page 55) |
| */ |
| status = pjsip_dlg_create_response( inv->dlg, rdata, 481, 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) { |
| /* Remove the message body */ |
| tdata->msg->body = NULL; |
| if (inv->options & PJSIP_INV_REQUIRE_100REL) { |
| status = pjsip_100rel_tx_response(inv, tdata); |
| } else { |
| status = pjsip_dlg_send_response(inv->dlg, invite_tsx, |
| tdata); |
| } |
| } |
| } |
| |
| if (invite_tsx) |
| pj_grp_lock_release(invite_tsx->grp_lock); |
| } |
| |
| |
| /* |
| * 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 { |
| struct tsx_inv_data *tsx_inv_data; |
| |
| tsx_inv_data = (struct tsx_inv_data*)tsx->mod_data[mod_inv.mod.id]; |
| if (tsx_inv_data) |
| tsx_inv_data->retrying = PJ_TRUE; |
| |
| /* 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); |
| } |
| |
| } |
| |
| /* |
| * Respond to incoming UPDATE request. |
| */ |
| static void inv_respond_incoming_update(pjsip_inv_session *inv, |
| pjsip_rx_data *rdata) |
| { |
| pjmedia_sdp_neg_state neg_state; |
| pj_status_t status; |
| pjsip_tx_data *tdata = NULL; |
| pjsip_status_code st_code; |
| |
| /* Invoke Session Timers module */ |
| status = pjsip_timer_process_req(inv, rdata, &st_code); |
| if (status != PJ_SUCCESS) { |
| status = pjsip_dlg_create_response(inv->dlg, rdata, st_code, |
| NULL, &tdata); |
| goto on_return; |
| } |
| |
| neg_state = pjmedia_sdp_neg_get_state(inv->neg); |
| |
| /* If UPDATE doesn't contain SDP, just respond with 200/OK. |
| * This is a valid scenario according to session-timer draft. |
| */ |
| if (rdata->msg_info.msg->body == NULL) { |
| |
| status = pjsip_dlg_create_response(inv->dlg, rdata, |
| 200, NULL, &tdata); |
| } |
| /* Send 491 if we receive UPDATE while we're waiting for an answer */ |
| else if (neg_state == PJMEDIA_SDP_NEG_STATE_LOCAL_OFFER) { |
| status = pjsip_dlg_create_response(inv->dlg, rdata, |
| PJSIP_SC_REQUEST_PENDING, NULL, |
| &tdata); |
| } |
| /* Send 500 with Retry-After header set randomly between 0 and 10 if we |
| * receive UPDATE while we haven't sent answer. |
| */ |
| else if (neg_state == PJMEDIA_SDP_NEG_STATE_REMOTE_OFFER || |
| neg_state == PJMEDIA_SDP_NEG_STATE_WAIT_NEGO) |
| { |
| pjsip_retry_after_hdr *ra_hdr; |
| int val; |
| |
| status = pjsip_dlg_create_response(inv->dlg, rdata, |
| PJSIP_SC_INTERNAL_SERVER_ERROR, |
| NULL, &tdata); |
| |
| val = (pj_rand() % 10); |
| ra_hdr = pjsip_retry_after_hdr_create(tdata->pool, val); |
| pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)ra_hdr); |
| |
| } else { |
| /* We receive new offer from remote */ |
| inv_check_sdp_in_incoming_msg(inv, pjsip_rdata_get_tsx(rdata), rdata); |
| |
| /* Application MUST have supplied the answer by now. |
| * If so, negotiate the SDP. |
| */ |
| neg_state = pjmedia_sdp_neg_get_state(inv->neg); |
| if (neg_state != PJMEDIA_SDP_NEG_STATE_WAIT_NEGO || |
| (status=inv_negotiate_sdp(inv)) != PJ_SUCCESS) |
| { |
| /* Negotiation has failed. If negotiator is still |
| * stuck at non-DONE state, cancel any ongoing offer. |
| */ |
| neg_state = pjmedia_sdp_neg_get_state(inv->neg); |
| if (neg_state != PJMEDIA_SDP_NEG_STATE_DONE) { |
| pjmedia_sdp_neg_cancel_offer(inv->neg); |
| } |
| |
| status = pjsip_dlg_create_response(inv->dlg, rdata, |
| PJSIP_SC_NOT_ACCEPTABLE_HERE, |
| NULL, &tdata); |
| } else { |
| /* New media has been negotiated successfully, send 200/OK */ |
| status = pjsip_dlg_create_response(inv->dlg, rdata, |
| PJSIP_SC_OK, NULL, &tdata); |
| if (status == PJ_SUCCESS) { |
| const pjmedia_sdp_session *sdp; |
| status = pjmedia_sdp_neg_get_active_local(inv->neg, &sdp); |
| if (status == PJ_SUCCESS) |
| tdata->msg->body = create_sdp_body(tdata->pool, sdp); |
| } |
| } |
| } |
| |
| on_return: |
| /* Invoke Session Timers */ |
| if (status == PJ_SUCCESS) |
| status = pjsip_timer_update_resp(inv, tdata); |
| |
| if (status != PJ_SUCCESS) { |
| if (tdata != NULL) { |
| pjsip_tx_data_dec_ref(tdata); |
| tdata = NULL; |
| } |
| return; |
| } |
| |
| pjsip_dlg_send_response(inv->dlg, pjsip_rdata_get_tsx(rdata), tdata); |
| } |
| |
| |
| /* |
| * Handle incoming response to UAC UPDATE request. |
| */ |
| static pj_bool_t inv_handle_update_response( pjsip_inv_session *inv, |
| pjsip_event *e) |
| { |
| pjsip_transaction *tsx = e->body.tsx_state.tsx; |
| struct tsx_inv_data *tsx_inv_data; |
| pj_bool_t handled = PJ_FALSE; |
| pj_status_t status = -1; |
| |
| tsx_inv_data = (struct tsx_inv_data*)tsx->mod_data[mod_inv.mod.id]; |
| pj_assert(tsx_inv_data); |
| |
| /* Handle 401/407 challenge. */ |
| if (tsx->state == PJSIP_TSX_STATE_COMPLETED && |
| (tsx->status_code == 401 || tsx->status_code == 407)) |
| { |
| 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) { |
| |
| /* Somehow failed. Probably it's not a good idea to terminate |
| * the session since this is just a request within dialog. And |
| * even if we terminate we should send BYE. |
| */ |
| /* |
| inv_set_cause(inv, PJSIP_SC_OK, NULL); |
| inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e); |
| */ |
| |
| } else { |
| if (tsx_inv_data) |
| tsx_inv_data->retrying = PJ_TRUE; |
| |
| /* Re-send request. */ |
| status = pjsip_inv_send_msg(inv, tdata); |
| } |
| |
| handled = PJ_TRUE; |
| } |
| |
| /* Process 422 response */ |
| else if (tsx->state == PJSIP_TSX_STATE_COMPLETED && |
| tsx->status_code == 422) |
| { |
| status = handle_timer_response(inv, e->body.tsx_state.src.rdata, |
| PJ_FALSE); |
| handled = PJ_TRUE; |
| } |
| |
| /* Process 2xx response */ |
| else if (tsx->state == PJSIP_TSX_STATE_COMPLETED && |
| tsx->status_code/100 == 2 && |
| e->body.tsx_state.src.rdata->msg_info.msg->body) |
| { |
| status = handle_timer_response(inv, e->body.tsx_state.src.rdata, |
| PJ_FALSE); |
| status = inv_check_sdp_in_incoming_msg(inv, tsx, |
| e->body.tsx_state.src.rdata); |
| handled = PJ_TRUE; |
| } |
| |
| /* Get/attach invite session's transaction data */ |
| else |
| { |
| /* Session-Timer needs to see any error responses, to determine |
| * whether peer supports UPDATE with empty body. |
| */ |
| if (tsx->state == PJSIP_TSX_STATE_COMPLETED && |
| tsx->role == PJSIP_ROLE_UAC) |
| { |
| status = handle_timer_response(inv, e->body.tsx_state.src.rdata, |
| PJ_FALSE); |
| handled = PJ_TRUE; |
| } |
| } |
| |
| /* Cancel the negotiation if we don't get successful negotiation by now, |
| * unless it's authentication challenge and the request is being retried. |
| */ |
| if (pjmedia_sdp_neg_get_state(inv->neg) == |
| PJMEDIA_SDP_NEG_STATE_LOCAL_OFFER && |
| tsx_inv_data && tsx_inv_data->sdp_done == PJ_FALSE && |
| !tsx_inv_data->retrying) |
| { |
| pjmedia_sdp_neg_cancel_offer(inv->neg); |
| |
| /* Prevent from us cancelling different offer! */ |
| tsx_inv_data->sdp_done = PJ_TRUE; |
| } |
| |
| return handled; |
| } |
| |
| |
| /* |
| * Handle incoming reliable response. |
| */ |
| static void inv_handle_incoming_reliable_response(pjsip_inv_session *inv, |
| pjsip_rx_data *rdata) |
| { |
| pjsip_tx_data *tdata; |
| const pjmedia_sdp_session *sdp; |
| pj_status_t status; |
| |
| /* Create PRACK */ |
| status = pjsip_100rel_create_prack(inv, rdata, &tdata); |
| if (status != PJ_SUCCESS) |
| return; |
| |
| /* See if we need to attach SDP answer on the PRACK request */ |
| sdp = inv_has_pending_answer(inv, pjsip_rdata_get_tsx(rdata)); |
| if (sdp) { |
| tdata->msg->body = create_sdp_body(tdata->pool, sdp); |
| } |
| |
| /* Send PRACK (must be using 100rel module!) */ |
| pjsip_100rel_send_prack(inv, tdata); |
| } |
| |
| |
| /* |
| * Handle incoming PRACK. |
| */ |
| static void inv_respond_incoming_prack(pjsip_inv_session *inv, |
| pjsip_rx_data *rdata) |
| { |
| pj_status_t status; |
| |
| /* Run through 100rel module to see if we can accept this |
| * PRACK request. The 100rel will send 200/OK to PRACK request. |
| */ |
| status = pjsip_100rel_on_rx_prack(inv, rdata); |
| if (status != PJ_SUCCESS) |
| return; |
| |
| /* Now check for SDP answer in the PRACK request */ |
| if (rdata->msg_info.msg->body) { |
| status = inv_check_sdp_in_incoming_msg(inv, |
| pjsip_rdata_get_tsx(rdata), rdata); |
| } else { |
| /* No SDP body */ |
| status = -1; |
| } |
| |
| /* If SDP negotiation has been successful, also mark the |
| * SDP negotiation flag in the invite transaction to be |
| * done too. |
| */ |
| if (status == PJ_SUCCESS && inv->invite_tsx) { |
| struct tsx_inv_data *tsx_inv_data; |
| |
| /* Get/attach invite session's transaction data */ |
| tsx_inv_data = (struct tsx_inv_data*) |
| inv->invite_tsx->mod_data[mod_inv.mod.id]; |
| if (tsx_inv_data == NULL) { |
| 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; |
| } |
| |
| tsx_inv_data->sdp_done = PJ_TRUE; |
| } |
| } |
| |
| |
| /* |
| * 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) { |
| |
| /* Save the original INVITE request. |
| * We may need to resend the INVITE if we receive redirection |
| * or session timer too small response. |
| */ |
| if (1) { |
| if (inv->invite_req) { |
| pjsip_tx_data_dec_ref(inv->invite_req); |
| inv->invite_req = NULL; |
| } |
| inv->invite_req = tsx->last_tx; |
| pjsip_tx_data_add_ref(inv->invite_req); |
| } |
| |
| 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; |
| case PJSIP_TSX_STATE_TERMINATED: |
| /* there is a failure in sending response. */ |
| inv_set_cause(inv, tsx->status_code, &tsx->status_text); |
| inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e); |
| break; |
| default: |
| inv_on_state_incoming(inv, e); |
| break; |
| } |
| } |
| |
| } else { |
| pj_assert(!"Unexpected transaction type"); |
| } |
| } |
| |
| /* |
| * Generic UAC transaction handler: |
| * - resend request on 401 or 407 response. |
| * - terminate dialog on 408 and 481 response. |
| * - resend request on 422 response. |
| */ |
| static pj_bool_t handle_uac_tsx_response(pjsip_inv_session *inv, |
| pjsip_event *e) |
| { |
| /* RFC 3261 Section 12.2.1.2: |
| * If the response for a request within a dialog is a 481 |
| * (Call/Transaction Does Not Exist) or a 408 (Request Timeout), the UAC |
| * SHOULD terminate the dialog. A UAC SHOULD also terminate a dialog if |
| * no response at all is received for the request (the client |
| * transaction would inform the TU about the timeout.) |
| * |
| * For INVITE initiated dialogs, terminating the dialog consists of |
| * sending a BYE. |
| * |
| * Note: |
| * according to X, this should terminate dialog usage only, not the |
| * dialog. |
| */ |
| pjsip_transaction *tsx = e->body.tsx_state.tsx; |
| |
| pj_assert(tsx->role == PJSIP_UAC_ROLE); |
| |
| /* Note that 481 response to CANCEL does not terminate dialog usage, |
| * but only the transaction. |
| */ |
| if (inv->state != PJSIP_INV_STATE_DISCONNECTED && |
| ((tsx->status_code == PJSIP_SC_CALL_TSX_DOES_NOT_EXIST && |
| tsx->method.id != PJSIP_CANCEL_METHOD) || |
| tsx->status_code == PJSIP_SC_REQUEST_TIMEOUT || |
| tsx->status_code == PJSIP_SC_TSX_TIMEOUT)) |
| { |
| pjsip_tx_data *bye; |
| pj_status_t status; |
| |
| inv_set_cause(inv, tsx->status_code, &tsx->status_text); |
| inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e); |
| |
| /* Send BYE */ |
| status = pjsip_dlg_create_request(inv->dlg, pjsip_get_bye_method(), |
| -1, &bye); |
| if (status == PJ_SUCCESS) { |
| pjsip_inv_send_msg(inv, bye); |
| } |
| |
| return PJ_TRUE; /* Handled */ |
| |
| } |
| /* Handle 401/407 challenge. */ |
| else if (tsx->state == PJSIP_TSX_STATE_COMPLETED && |
| (tsx->status_code == PJSIP_SC_UNAUTHORIZED || |
| tsx->status_code == PJSIP_SC_PROXY_AUTHENTICATION_REQUIRED)) |
| { |
| pjsip_tx_data *tdata; |
| pj_status_t status; |
| |
| if (tsx->method.id == PJSIP_INVITE_METHOD) |
| inv->invite_tsx = NULL; |
| |
| status = pjsip_auth_clt_reinit_req( &inv->dlg->auth_sess, |
| e->body.tsx_state.src.rdata, |
| tsx->last_tx, &tdata); |
| |
| if (status != PJ_SUCCESS) { |
| /* Somehow failed. Probably it's not a good idea to terminate |
| * the session since this is just a request within dialog. And |
| * even if we terminate we should send BYE. |
| */ |
| /* |
| inv_set_cause(inv, PJSIP_SC_OK, NULL); |
| inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e); |
| */ |
| |
| } else { |
| struct tsx_inv_data *tsx_inv_data; |
| |
| tsx_inv_data = (struct tsx_inv_data*)tsx->mod_data[mod_inv.mod.id]; |
| if (tsx_inv_data) |
| tsx_inv_data->retrying = PJ_TRUE; |
| |
| /* Re-send request. */ |
| status = pjsip_inv_send_msg(inv, tdata); |
| } |
| |
| return PJ_TRUE; /* Handled */ |
| } |
| |
| /* Handle session timer 422 response. */ |
| else if (tsx->state == PJSIP_TSX_STATE_COMPLETED && |
| tsx->status_code == PJSIP_SC_SESSION_TIMER_TOO_SMALL) |
| { |
| handle_timer_response(inv, e->body.tsx_state.src.rdata, |
| PJ_FALSE); |
| |
| return PJ_TRUE; /* Handled */ |
| |
| } else { |
| return PJ_FALSE; /* Unhandled */ |
| } |
| } |
| |
| |
| /* Handle call rejection, especially with regard to processing call |
| * redirection. We need to handle the following scenarios: |
| * - 3xx response is received -- see if on_redirected() callback is |
| * implemented. If so, add the Contact URIs in the response to the |
| * target set and notify user. |
| * - 4xx - 6xx resposne is received -- see if we're currently recursing, |
| * if so fetch the next target if any and notify the on_redirected() |
| * callback. |
| * - for other cases -- disconnect the session. |
| */ |
| static void handle_uac_call_rejection(pjsip_inv_session *inv, pjsip_event *e) |
| { |
| pjsip_transaction *tsx = e->body.tsx_state.tsx; |
| pj_status_t status; |
| |
| if (PJSIP_IS_STATUS_IN_CLASS(tsx->status_code, 300)) { |
| |
| if (mod_inv.cb.on_redirected == NULL) { |
| |
| /* Redirection callback is not implemented, disconnect the |
| * call. |
| */ |
| goto terminate_session; |
| |
| } else { |
| const pjsip_msg *res_msg; |
| |
| res_msg = e->body.tsx_state.src.rdata->msg_info.msg; |
| |
| /* Gather all Contact URI's in the response and add them |
| * to target set. The function will take care of removing |
| * duplicate URI's. |
| */ |
| pjsip_target_set_add_from_msg(&inv->dlg->target_set, |
| inv->dlg->pool, res_msg); |
| |
| /* Recurse to alternate targets if application allows us */ |
| if (!inv_uac_recurse(inv, tsx->status_code, &tsx->status_text, e)) |
| { |
| /* Recursion fails, terminate session now */ |
| goto terminate_session; |
| } |
| |
| /* Done */ |
| } |
| |
| } 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. If we are currently |
| * recursing, try the next target. Otherwise end the session. |
| */ |
| if (!inv_uac_recurse(inv, tsx->status_code, &tsx->status_text, e)) |
| { |
| /* Recursion fails, terminate session now */ |
| goto terminate_session; |
| } |
| |
| } else { |
| |
| /* Restart session. */ |
| pjsip_inv_uac_restart(inv, PJ_FALSE); |
| |
| /* Send the request. */ |
| status = pjsip_inv_send_msg(inv, tdata); |
| } |
| |
| } else if (tsx->state == PJSIP_TSX_STATE_COMPLETED && |
| tsx->status_code == PJSIP_SC_SESSION_TIMER_TOO_SMALL) |
| { |
| /* Handle session timer 422 response: |
| * Resend the request with requested session timer setting. |
| */ |
| status = handle_timer_response(inv, e->body.tsx_state.src.rdata, |
| PJ_TRUE); |
| |
| } else if (PJSIP_IS_STATUS_IN_CLASS(tsx->status_code, 600)) { |
| /* Global error */ |
| goto terminate_session; |
| |
| } else { |
| /* See if we have alternate target to try */ |
| if (!inv_uac_recurse(inv, tsx->status_code, &tsx->status_text, e)) { |
| /* Recursion fails, terminate session now */ |
| goto terminate_session; |
| } |
| } |
| return; |
| |
| terminate_session: |
| inv_set_cause(inv, tsx->status_code, &tsx->status_text); |
| inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e); |
| } |
| |
| |
| /* |
| * 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); |
| |
| if (pjsip_100rel_is_reliable(e->body.tsx_state.src.rdata)) { |
| inv_handle_incoming_reliable_response( |
| inv, 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); |
| |
| /* Process session timer response. */ |
| status = handle_timer_response(inv, |
| e->body.tsx_state.src.rdata, |
| PJ_TRUE); |
| if (status != PJ_SUCCESS) |
| break; |
| |
| inv_set_state(inv, PJSIP_INV_STATE_CONNECTING, e); |
| |
| inv_check_sdp_in_incoming_msg(inv, tsx, |
| e->body.tsx_state.src.rdata); |
| |
| } else { |
| handle_uac_call_rejection(inv, 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 */ |
| |
| /* Process session timer response. */ |
| status = handle_timer_response(inv, |
| e->body.tsx_state.src.rdata, |
| PJ_TRUE); |
| if (status != PJ_SUCCESS) |
| break; |
| |
| /* 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); |
| |
| } 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 (tsx->role == PJSIP_ROLE_UAC) { |
| /* |
| * Handle case when outgoing request 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). |
| * Note that 481 response to CANCEL does not terminate dialog usage, |
| * but only the transaction. |
| */ |
| if ((tsx->status_code == PJSIP_SC_CALL_TSX_DOES_NOT_EXIST && |
| tsx->method.id != PJSIP_CANCEL_METHOD) || |
| 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); |
| } |
| } else if (tsx->role == PJSIP_ROLE_UAS && |
| tsx->state == PJSIP_TSX_STATE_TRYING && |
| pjsip_method_cmp(&tsx->method, &pjsip_update_method)==0) |
| { |
| /* |
| * Handle a very early UPDATE |
| */ |
| inv_respond_incoming_update(inv, e->body.tsx_state.src.rdata); |
| |
| |
| } |
| } |
| |
| /* |
| * 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); |
| |
| } |
| } |
| |
| /* |
| * 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); |
| |
| if (pjsip_100rel_is_reliable(e->body.tsx_state.src.rdata)) { |
| inv_handle_incoming_reliable_response( |
| inv, 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) { |
| pj_status_t status; |
| |
| /* Process session timer response. */ |
| status = handle_timer_response(inv, |
| e->body.tsx_state.src.rdata, |
| PJ_TRUE); |
| if (status != PJ_SUCCESS) |
| break; |
| |
| inv_check_sdp_in_incoming_msg(inv, tsx, |
| e->body.tsx_state.src.rdata); |
| } |
| |
| } else if (tsx->role == PJSIP_ROLE_UAC) { |
| |
| handle_uac_call_rejection(inv, 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_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) { |
| pj_status_t status; |
| |
| /* Process session timer response. */ |
| status = handle_timer_response(inv, |
| e->body.tsx_state.src.rdata, |
| PJ_TRUE); |
| if (status != PJ_SUCCESS) |
| break; |
| |
| 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); |
| } |
| |
| } 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"); |
| break; |
| } |
| |
| } 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); |
| |
| } else if (tsx->role == PJSIP_ROLE_UAS && |
| tsx->state == PJSIP_TSX_STATE_TRYING && |
| pjsip_method_cmp(&tsx->method, &pjsip_update_method)==0) |
| { |
| /* |
| * Handle incoming UPDATE |
| */ |
| inv_respond_incoming_update(inv, e->body.tsx_state.src.rdata); |
| |
| |
| } else if (tsx->role == PJSIP_ROLE_UAC && |
| (tsx->state == PJSIP_TSX_STATE_COMPLETED || |
| tsx->state == PJSIP_TSX_STATE_TERMINATED) && |
| pjsip_method_cmp(&tsx->method, &pjsip_update_method)==0) |
| { |
| /* |
| * Handle response to outgoing UPDATE request. |
| */ |
| inv_handle_update_response(inv, e); |
| |
| } else if (tsx->role == PJSIP_ROLE_UAS && |
| tsx->state == PJSIP_TSX_STATE_TRYING && |
| pjsip_method_cmp(&tsx->method, &pjsip_prack_method)==0) |
| { |
| /* |
| * Handle incoming PRACK |
| */ |
| inv_respond_incoming_prack(inv, e->body.tsx_state.src.rdata); |
| |
| } else if (tsx->role == PJSIP_ROLE_UAC) { |
| |
| /* Generic handling for UAC tsx completion */ |
| handle_uac_tsx_response(inv, e); |
| |
| } 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) |
| { |
| /* Received BYE before the 2xx/OK response to INVITE. |
| * Assume that the 2xx/OK response is lost and the BYE |
| * arrives earlier. |
| */ |
| inv_respond_incoming_bye(inv, tsx, e->body.tsx_state.src.rdata, e); |
| |
| if (inv->invite_tsx->role == PJSIP_ROLE_UAC) { |
| /* Set timer just in case we will never get the final response |
| * for INVITE. |
| */ |
| pjsip_tsx_set_timeout(inv->invite_tsx, 64*pjsip_cfg()->tsx.t1); |
| } else if (inv->invite_tsx->status_code < 200) { |
| pjsip_tx_data *tdata; |
| pjsip_msg *msg; |
| |
| /* For UAS, send a final response. */ |
| tdata = inv->invite_tsx->last_tx; |
| PJ_ASSERT_ON_FAIL(tdata != NULL, return); |
| |
| msg = tdata->msg; |
| msg->line.status.code = PJSIP_SC_REQUEST_TERMINATED; |
| msg->line.status.reason = |
| *pjsip_get_status_text(PJSIP_SC_REQUEST_TERMINATED); |
| msg->body = NULL; |
| |
| pjsip_tx_data_invalidate_msg(tdata); |
| pjsip_tx_data_add_ref(tdata); |
| |
| pjsip_dlg_send_response(inv->dlg, inv->invite_tsx, tdata); |
| } |
| } |
| } |
| |
| /* |
| * 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) { |
| if (tsx->role == PJSIP_ROLE_UAC) { |
| inv_set_cause(inv, tsx->status_code, &tsx->status_text); |
| inv_set_state(inv, PJSIP_INV_STATE_DISCONNECTED, e); |
| } else { |
| pjsip_tx_data *bye; |
| pj_status_t status; |
| |
| /* Send BYE */ |
| status = pjsip_dlg_create_request(inv->dlg, |
| pjsip_get_bye_method(), |
| -1, &bye); |
| if (status == PJ_SUCCESS) { |
| pjsip_inv_send_msg(inv, bye); |
| } |
| } |
| } |
| break; |
| |
| case PJSIP_TSX_STATE_DESTROYED: |
| /* Do nothing. */ |
| break; |
| |
| default: |
| pj_assert(!"Unexpected state"); |
| break; |
| } |
| |
| } 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 or CANCEL for re-INVITE |
| */ |
| inv_respond_incoming_cancel(inv, tsx, e); |
| |
| } else if (tsx->role == PJSIP_ROLE_UAS && |
| tsx->state == PJSIP_TSX_STATE_TRYING && |
| pjsip_method_cmp(&tsx->method, &pjsip_invite_method)==0) |
| { |
| pjsip_rx_data *rdata = e->body.tsx_state.src.rdata; |
| pjsip_tx_data *tdata; |
| pj_status_t status; |
| |
| /* See https://trac.pjsip.org/repos/ticket/1455 |
| * Handle incoming re-INVITE before current INVITE is confirmed. |
| * According to RFC 5407: |
| * - answer with 200 if we don't have pending offer-answer |
| * - answer with 491 if we *have* pending offer-answer |
| * |
| * But unfortunately accepting the re-INVITE would mean we have |
| * two outstanding INVITEs, and we don't support that because |
| * we will get confused when we handle the ACK. |
| */ |
| status = pjsip_dlg_create_response(inv->dlg, rdata, |
| PJSIP_SC_REQUEST_PENDING, |
| NULL, &tdata); |
| if (status != PJ_SUCCESS) |
| return; |
| pjsip_timer_update_resp(inv, tdata); |
| status = pjsip_dlg_send_response(dlg, tsx, tdata); |
| |
| } else if (tsx->role == PJSIP_ROLE_UAS && |
| tsx->state == PJSIP_TSX_STATE_TRYING && |
| pjsip_method_cmp(&tsx->method, &pjsip_update_method)==0) |
| { |
| /* |
| * Handle incoming UPDATE |
| */ |
| inv_respond_incoming_update(inv, e->body.tsx_state.src.rdata); |
| |
| |
| } else if (tsx->role == PJSIP_ROLE_UAC && |
| (tsx->state == PJSIP_TSX_STATE_COMPLETED || |
| tsx->state == PJSIP_TSX_STATE_TERMINATED) && |
| pjsip_method_cmp(&tsx->method, &pjsip_update_method)==0) |
| { |
| /* |
| * Handle response to outgoing UPDATE request. |
| */ |
| if (inv_handle_update_response(inv, e) == PJ_FALSE) |
| handle_uac_tsx_response(inv, e); |
| |
| } else if (tsx->role == PJSIP_ROLE_UAS && |
| tsx->state == PJSIP_TSX_STATE_TRYING && |
| pjsip_method_cmp(&tsx->method, &pjsip_prack_method)==0) |
| { |
| /* |
| * Handle incoming PRACK |
| */ |
| inv_respond_incoming_prack(inv, e->body.tsx_state.src.rdata); |
| |
| } else if (tsx->role == PJSIP_ROLE_UAC) { |
| |
| /* Generic handling for UAC tsx completion */ |
| handle_uac_tsx_response(inv, e); |
| |
| } |
| |
| } |
| |
| /* |
| * 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; |
| pjsip_rdata_sdp_info *sdp_info = NULL; |
| pjsip_status_code st_code; |
| |
| /* Check if we have INVITE pending. */ |
| if (inv->invite_tsx && inv->invite_tsx!=tsx) { |
| int code; |
| pj_str_t reason; |
| |
| reason = pj_str("Another INVITE transaction in progress"); |
| |
| if (inv->invite_tsx->role == PJSIP_ROLE_UAC) |
| code = 491; |
| else |
| code = 500; |
| |
| /* Can not receive re-INVITE while another one is pending. */ |
| status = pjsip_dlg_create_response( inv->dlg, rdata, code, |
| &reason, &tdata); |
| if (status != PJ_SUCCESS) |
| return; |
| |
| if (code == 500) { |
| /* MUST include Retry-After header with random value |
| * between 0-10. |
| */ |
| pjsip_retry_after_hdr *ra_hdr; |
| int val = (pj_rand() % 10); |
| |
| ra_hdr = pjsip_retry_after_hdr_create(tdata->pool, val); |
| pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr*)ra_hdr); |
| } |
| |
| status = pjsip_dlg_send_response( inv->dlg, tsx, tdata); |
| |
| |
| return; |
| } |
| |
| /* Save the invite transaction. */ |
| inv->invite_tsx = tsx; |
| |
| /* Process session timers headers in the re-INVITE */ |
| status = pjsip_timer_process_req(inv, rdata, &st_code); |
| if (status != PJ_SUCCESS) { |
| status = pjsip_dlg_create_response(inv->dlg, rdata, st_code, |
| NULL, &tdata); |
| if (status != PJ_SUCCESS) |
| return; |
| |
| pjsip_timer_update_resp(inv, tdata); |
| status = pjsip_dlg_send_response(dlg, tsx, tdata); |
| return; |
| } |
| |
| /* Send 491 if we receive re-INVITE while another offer/answer |
| * negotiation is in progress |
| */ |
| if (pjmedia_sdp_neg_get_state(inv->neg) != |
| PJMEDIA_SDP_NEG_STATE_DONE) |
| { |
| status = pjsip_dlg_create_response(inv->dlg, rdata, |
| PJSIP_SC_REQUEST_PENDING, |
| NULL, &tdata); |
| if (status != PJ_SUCCESS) |
| return; |
| pjsip_timer_update_resp(inv, tdata); |
| status = pjsip_dlg_send_response(dlg, tsx, tdata); |
| return; |
| } |
| |
| /* Process SDP in incoming message. */ |
| status = inv_check_sdp_in_incoming_msg(inv, tsx, rdata); |
| |
| if (status == PJ_SUCCESS && mod_inv.cb.on_rx_reinvite && |
| inv->notify) |
| { |
| pj_status_t rc; |
| |
| sdp_info = pjsip_rdata_get_sdp_info(rdata); |
| rc = (*mod_inv.cb.on_rx_reinvite)(inv, sdp_info->sdp, |
| rdata); |
| if (rc == PJ_SUCCESS) { |
| /* Application will send its own response. |
| * Our job is done. */ |
| PJ_LOG(5,(inv->obj_name, "on_rx_reinvite() returns %d", |
| rc)); |
| return; |
| } |
| |
| /* If application lets us answer the re-INVITE, |
| * application must set the SDP answer with |
| * #pjsip_inv_set_sdp_answer(). |
| */ |
| if (pjmedia_sdp_neg_get_state(inv->neg) != |
| PJMEDIA_SDP_NEG_STATE_WAIT_NEGO) |
| { |
| status = PJ_EINVALIDOP; |
| } |
| } |
| |
| if (status != PJ_SUCCESS) { |
| |
| /* Not Acceptable */ |
| const pjsip_hdr *accept; |
| |
| /* The incoming SDP is unacceptable. If the SDP negotiator |
| * state has just been changed, i.e: DONE -> REMOTE_OFFER, |
| * revert it back. |
| */ |
| if (pjmedia_sdp_neg_get_state(inv->neg) == |
| PJMEDIA_SDP_NEG_STATE_REMOTE_OFFER) |
| { |
| pjmedia_sdp_neg_cancel_offer(inv->neg); |
| } |
| |
| 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 (!sdp_info) |
| sdp_info = pjsip_rdata_get_sdp_info(rdata); |
| if (sdp_info->sdp != 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) { |
| /* Notify negotiator about the new offer. This will |
| * fix the offer with correct SDP origin. |
| */ |
| status = |
| pjmedia_sdp_neg_modify_local_offer2( |
| inv->pool_prov, inv->neg, |
| inv->sdp_neg_flags, sdp); |
| |
| /* Retrieve the "fixed" offer from negotiator */ |
| if (status==PJ_SUCCESS) { |
| const pjmedia_sdp_session *lsdp = NULL; |
| pjmedia_sdp_neg_get_neg_local(inv->neg, &lsdp); |
| sdp = (pjmedia_sdp_session*)lsdp; |
| } |
| } |
| } |
| |
| if (sdp == NULL) { |
| const pjmedia_sdp_session *active_sdp = NULL; |
| status = pjmedia_sdp_neg_send_local_offer(inv->pool_prov, |
| 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; |
| } |
| |
| /* Invoke Session Timers */ |
| pjsip_timer_update_resp(inv, tdata); |
| |
| /* 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); |
| |
| /* Check if local offer got no SDP answer */ |
| if (pjmedia_sdp_neg_get_state(inv->neg)== |
| PJMEDIA_SDP_NEG_STATE_LOCAL_OFFER) |
| { |
| pjmedia_sdp_neg_cancel_offer(inv->neg); |
| } |
| } |
| |
| } |
| |
| } |
| else if (tsx->method.id == PJSIP_INVITE_METHOD && |
| tsx->role == PJSIP_ROLE_UAC) |
| { |
| |
| /* |
| * Handle outgoing re-INVITE |
| */ |
| if (tsx->state == PJSIP_TSX_STATE_CALLING) { |
| |
| /* Must not have other pending INVITE transaction */ |
| pj_assert(inv->invite_tsx==NULL || tsx==inv->invite_tsx); |
| |
| /* Save pending invite transaction */ |
| inv->invite_tsx = tsx; |
| |
| } else if (tsx->state == PJSIP_TSX_STATE_PROCEEDING) { |
| |
| /* CANCEL the re-INVITE if necessary */ |
| if (inv->pending_cancel) { |
| pj_status_t status; |
| pjsip_tx_data *cancel; |
| |
| inv->pending_cancel = PJ_FALSE; |
| |
| status = pjsip_inv_cancel_reinvite(inv, &cancel); |
| if (status == PJ_SUCCESS && cancel) |
| status = pjsip_inv_send_msg(inv, cancel); |
| } |
| |
| } else if (tsx->state == PJSIP_TSX_STATE_TERMINATED && |
| tsx->status_code/100 == 2) |
| { |
| pj_status_t status; |
| |
| /* Re-INVITE was accepted. */ |
| |
| /* Process session timer response. */ |
| status = handle_timer_response(inv, |
| e->body.tsx_state.src.rdata, |
| PJ_TRUE); |
| if (status != PJ_SUCCESS) |
| return; |
| |
| /* Process SDP */ |
| inv_check_sdp_in_incoming_msg(inv, tsx, |
| e->body.tsx_state.src.rdata); |
| |
| /* Check if local offer got no SDP answer */ |
| if (pjmedia_sdp_neg_get_state(inv->neg)== |
| PJMEDIA_SDP_NEG_STATE_LOCAL_OFFER) |
| { |
| pjmedia_sdp_neg_cancel_offer(inv->neg); |
| } |
| |
| /* Send ACK */ |
| inv_send_ack(inv, e); |
| |
| } else if (handle_uac_tsx_response(inv, e)) { |
| |
| /* Handle response that terminates dialog */ |
| /* Nothing to do (already handled) */ |
| |
| } else if (tsx->status_code >= 300 && tsx->status_code < 700 && |
| e->body.tsx_state.prev_state != PJSIP_TSX_STATE_COMPLETED) |
| { |
| /* Ticket #1654: do not cancel SDP offer when tsx state changing |
| * from 'completed' to 'terminated', as it should have already |
| * been cancelled when tsx state is 'completed'. |
| */ |
| |
| pjmedia_sdp_neg_state neg_state; |
| struct tsx_inv_data *tsx_inv_data; |
| |
| tsx_inv_data = (struct tsx_inv_data*)tsx->mod_data[mod_inv.mod.id]; |
| |
| /* 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 && |
| tsx_inv_data->retrying == PJ_FALSE) |
| { |
| pjmedia_sdp_neg_cancel_offer(inv->neg); |
| } |
| |
| if (tsx == inv->invite_tsx) |
| inv->invite_tsx = NULL; |
| } |
| |
| } else if (tsx->role == PJSIP_ROLE_UAS && |
| tsx->state == PJSIP_TSX_STATE_TRYING && |
| pjsip_method_cmp(&tsx->method, &pjsip_update_method)==0) |
| { |
| /* |
| * Handle incoming UPDATE |
| */ |
| inv_respond_incoming_update(inv, e->body.tsx_state.src.rdata); |
| |
| } else if (tsx->role == PJSIP_ROLE_UAC && |
| (tsx->state == PJSIP_TSX_STATE_COMPLETED || |
| tsx->state == PJSIP_TSX_STATE_TERMINATED) && |
| pjsip_method_cmp(&tsx->method, &pjsip_update_method)==0) |
| { |
| /* |
| * Handle response to outgoing UPDATE request. |
| */ |
| if (inv_handle_update_response(inv, e) == PJ_FALSE) |
| handle_uac_tsx_response(inv, e); |
| |
| } else if (tsx->role == PJSIP_ROLE_UAS && |
| tsx->state == PJSIP_TSX_STATE_TRYING && |
| pjsip_method_cmp(&tsx->method, &pjsip_prack_method)==0) |
| { |
| /* |
| * Handle strandled incoming PRACK |
| */ |
| inv_respond_incoming_prack(inv, e->body.tsx_state.src.rdata); |
| |
| } else if (tsx->role == PJSIP_ROLE_UAC) { |
| /* |
| * Handle 401/407/408/481/422 response |
| */ |
| handle_uac_tsx_response(inv, e); |
| } |
| |
| } |
| |
| /* |
| * 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; |
| |
| } |
| |
| } else if (tsx->role == PJSIP_ROLE_UAC) { |
| /* |
| * Handle 401/407/408/481/422 response |
| */ |
| handle_uac_tsx_response(inv, e); |
| } |
| } |
| |