diff options
Diffstat (limited to 'res')
| -rw-r--r-- | res/res_pjsip_session.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/res/res_pjsip_session.c b/res/res_pjsip_session.c index b6b8a21ac..f6b3b937a 100644 --- a/res/res_pjsip_session.c +++ b/res/res_pjsip_session.c @@ -1550,6 +1550,46 @@ int ast_sip_session_refresh(struct ast_sip_session *session, return 0; } +int ast_sip_session_regenerate_answer(struct ast_sip_session *session, + ast_sip_session_sdp_creation_cb on_sdp_creation) +{ + pjsip_inv_session *inv_session = session->inv_session; + pjmedia_sdp_session *new_answer = NULL; + const pjmedia_sdp_session *previous_offer = NULL; + + /* The SDP answer can only be regenerated if it is still pending to be sent */ + if (!inv_session->neg || (pjmedia_sdp_neg_get_state(inv_session->neg) != PJMEDIA_SDP_NEG_STATE_REMOTE_OFFER && + pjmedia_sdp_neg_get_state(inv_session->neg) != PJMEDIA_SDP_NEG_STATE_WAIT_NEGO)) { + ast_log(LOG_WARNING, "Requested to regenerate local SDP answer for channel '%s' but negotiation in state '%s'\n", + ast_channel_name(session->channel), pjmedia_sdp_neg_state_str(pjmedia_sdp_neg_get_state(inv_session->neg))); + return -1; + } + + pjmedia_sdp_neg_get_neg_remote(inv_session->neg, &previous_offer); + if (pjmedia_sdp_neg_get_state(inv_session->neg) == PJMEDIA_SDP_NEG_STATE_WAIT_NEGO) { + /* Transition the SDP negotiator back to when it received the remote offer */ + pjmedia_sdp_neg_negotiate(inv_session->pool, inv_session->neg, 0); + pjmedia_sdp_neg_set_remote_offer(inv_session->pool, inv_session->neg, previous_offer); + } + + new_answer = create_local_sdp(inv_session, session, previous_offer); + if (!new_answer) { + ast_log(LOG_WARNING, "Could not create a new local SDP answer for channel '%s'\n", + ast_channel_name(session->channel)); + return -1; + } + + if (on_sdp_creation) { + if (on_sdp_creation(session, new_answer)) { + return -1; + } + } + + pjsip_inv_set_sdp_answer(inv_session, new_answer); + + return 0; +} + void ast_sip_session_send_response(struct ast_sip_session *session, pjsip_tx_data *tdata) { handle_outgoing_response(session, tdata); |