Increment SDP version upon creating subsequent offer inside the call (ref: Sipit21/Mon/12:30)

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@1549 74dad513-b988-da41-8d7b-12977e46ad98

1 files changed, 20 insertions, 0 deletions

diff --git a/pjsip/src/pjsua-lib/pjsua_call.c b/pjsip/src/pjsua-lib/pjsua_call.c
index cb4959b3..aaf02efe 100644
--- a/pjsip/src/pjsua-lib/pjsua_call.c
+++ b/pjsip/src/pjsua-lib/pjsua_call.c
@@ -71,6 +71,21 @@ static void pjsua_call_on_tsx_state_changed(pjsip_inv_session *inv,
 static pj_status_t create_inactive_sdp(pjsua_call *call,
 				       pjmedia_sdp_session **p_answer);
 
+/* Update SDP version in the offer */
+static void update_sdp_version(pjsua_call *call,
+			       pjmedia_sdp_session *sdp)
+{
+    const pjmedia_sdp_session *old_sdp = NULL;
+    pj_status_t status;
+
+    status = pjmedia_sdp_neg_get_active_local(call->inv->neg, &old_sdp);
+    if (status != PJ_SUCCESS || old_sdp == NULL)
+	return;
+
+    sdp->origin.version = old_sdp->origin.version + 1;
+}
+
+
 /*
  * Callback called by event framework when the xfer subscription state
  * has changed.
@@ -1222,6 +1237,8 @@ PJ_DEF(pj_status_t) pjsua_call_set_hold(pjsua_call_id call_id,
 	return status;
     }
 
+    update_sdp_version(call, sdp);
+
     /* Create re-INVITE with new offer */
     status = pjsip_inv_reinvite( call->inv, NULL, sdp, &tdata);
     if (status != PJ_SUCCESS) {
@@ -1293,6 +1310,8 @@ PJ_DEF(pj_status_t) pjsua_call_reinvite( pjsua_call_id call_id,
 	return status;
     }
 
+    update_sdp_version(call, sdp);
+
     /* Create re-INVITE with new offer */
     status = pjsip_inv_reinvite( call->inv, NULL, sdp, &tdata);
     if (status != PJ_SUCCESS) {
@@ -2506,6 +2525,7 @@ static void pjsua_call_on_create_offer(pjsip_inv_session *inv,
 	return;
     }
 
+    update_sdp_version(call, *offer);
 
     PJSUA_UNLOCK();
 }