Changeset 1598 for pjproject/trunk/pjsip/include/pjsip-ua/sip_inv.h
- Timestamp:
- Nov 25, 2007 4:40:07 AM (16 years ago)
- File:
-
- 1 edited
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pjproject/trunk/pjsip/include/pjsip-ua/sip_inv.h
r1477 r1598 191 191 void (*on_media_update)(pjsip_inv_session *inv_ses, 192 192 pj_status_t status); 193 194 /** 195 * This callback is called when the framework needs to send 196 * ACK request after it receives incoming 2xx response for 197 * INVITE. It allows application to manually handle the 198 * transmission of ACK request, which is required by some 3PCC 199 * scenarios. If this callback is not implemented, the framework 200 * will handle the ACK transmission automatically. 201 * 202 * When this callback is overridden, application may delay the 203 * sending of the ACK request (for example, when it needs to 204 * wait for answer from the other call leg, in 3PCC scenarios). 205 * 206 * Application creates the ACK request 207 * 208 * Once it has sent the ACK request, the framework will keep 209 * this ACK request in the cache. Subsequent receipt of 2xx response 210 * will not cause this callback to be called, and instead automatic 211 * retransmission of this ACK request from the cache will be done 212 * by the framework. 213 * 214 * This callback is optional. 215 */ 216 void (*on_send_ack)(pjsip_inv_session *inv, pjsip_rx_data *rdata); 193 217 194 218 } pjsip_inv_callback; … … 588 612 589 613 /** 614 * Create an ACK request. Normally ACK request transmission is handled 615 * by the framework. Application only needs to use this function if it 616 * handles the ACK transmission manually, by overriding \a on_send_ack() 617 * callback in #pjsip_inv_callback. 618 * 619 * Note that if the invite session has a pending offer to be answered 620 * (for example when the last 2xx response to INVITE contains an offer), 621 * application MUST have set the SDP answer with #pjsip_create_sdp_body() 622 * prior to creating the ACK request. In this case, the ACK request 623 * will be added with SDP message body. 624 * 625 * @param inv The invite session. 626 * @param cseq Mandatory argument to specify the CSeq of the 627 * ACK request. This value MUST match the value 628 * of the INVITE transaction to be acknowledged. 629 * @param p_tdata Pointer to receive the ACK request message to 630 * be created. 631 * 632 * @return PJ_SUCCESS if ACK request has been created. 633 */ 634 PJ_DECL(pj_status_t) pjsip_inv_create_ack(pjsip_inv_session *inv, 635 int cseq, 636 pjsip_tx_data **p_tdata); 637 638 639 /** 590 640 * Send request or response message in tdata. 591 641 * … … 603 653 604 654 605 606 655 /** 607 656 * Get the invite session for the dialog, if any.
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