Fix a crash that can result if text codecs are allowed but textsupport is disabled.

(closes issue #15596)
Reported by: fabled
Patches:
      sip-red.patch uploaded by fabled (license 448)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@209516 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 6b9f39a..372d8d9 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -8611,7 +8611,7 @@ static int process_sdp(struct sip_pvt *p, struct sip_request *req, int t38action
                p->jointcapability = ast_codec_choose(&p->prefs, p->jointcapability, 1);
        }
 
                p->jointcapability = ast_codec_choose(&p->prefs, p->jointcapability, 1);
        }
 

-       if (p->jointcapability & AST_FORMAT_T140RED) {
+       if (p->trtp && (p->jointcapability & AST_FORMAT_T140RED)) {

                p->red = 1;
                ast_rtp_red_init(p->trtp, 300, red_data_pt, 2);
        } else {
                p->red = 1;
                ast_rtp_red_init(p->trtp, 300, red_data_pt, 2);
        } else {