Fix an issue with requesting a T38 reinvite before the call is answered.

The code responsible for sending the T38 reinvite did not check if an INVITE was
already being handled. This caused things to get confused and the call to fail.
The code now defers sending the T38 reinvite until the current INVITE is done being
handled.

(issue AST-191)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@182022 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 5d80ef32166b8c352963feb1f70fe286c1c45bfc..901fc5d9a356fa3db22f404920368448ffd40112 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -6081,7 +6081,11 @@ static int sip_indicate(struct ast_channel *ast, int condition, const void *data
                        case AST_T38_REQUEST_NEGOTIATE:         /* Request T38 */
                                if (p->t38.state != T38_ENABLED) {
                                        change_t38_state(p, T38_LOCAL_REINVITE);
-                                       transmit_reinvite_with_sdp(p, TRUE, FALSE);
+                                       if (!p->pendinginvite) {
+                                               transmit_reinvite_with_sdp(p, TRUE, FALSE);
+                                       } else if (!ast_test_flag(&p->flags[0], SIP_PENDINGBYE)) {
+                                               ast_set_flag(&p->flags[0], SIP_NEEDREINVITE);
+                                       }
                                }
                                break;
                        case AST_T38_TERMINATED:
@@ -16491,7 +16495,7 @@ static void check_pendings(struct sip_pvt *p)
                } else {
                        ast_debug(2, "Sending pending reinvite on '%s'\n", p->callid);
                        /* Didn't get to reinvite yet, so do it now */
-                       transmit_reinvite_with_sdp(p, FALSE, FALSE);
+                       transmit_reinvite_with_sdp(p, (p->t38.state == T38_LOCAL_REINVITE ? TRUE : FALSE), FALSE);
                        ast_clear_flag(&p->flags[0], SIP_NEEDREINVITE); 
                }
        }