Don't accept new INVITE if we already have one pending.

[asterisk/asterisk.git] / channels / chan_sip.c

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index fea0f55..ef40086 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -10584,6 +10584,16 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
                /* We do NOT destroy p here, so that our response will be accepted */
                return 0;
        }
                /* We do NOT destroy p here, so that our response will be accepted */
                return 0;
        }

+
+       if (!ignore && p->pendinginvite) {
+               /* We already have a pending invite. Sorry. You are on hold. */
+               transmit_response(p, "491 Request Pending", req);
+               if (option_debug > 1)
+                       ast_log(LOG_DEBUG, "Got INVITE on call where we already have pending INVITE, deferring that - %s\n", p->callid);
+               /* Do NOT destroy dialog */
+               return 0;
+       }
+

        if (!ignore) {
                /* Use this as the basis */
                if (debug)
        if (!ignore) {
                /* Use this as the basis */
                if (debug)