Don't send the same codec twice even if listed twice in allow section (bug #1691)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3033 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 0aa8f57..9121b3e 100755 (executable)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -3088,7 +3088,7 @@ static int add_sdp(struct sip_request *resp, struct sip_pvt *p, struct ast_rtp *
        /* Start by sending our preferred codecs */
        cur = prefs;
        while(cur) {
-               if (p->jointcapability & cur->codec) {
+               if ((p->jointcapability & cur->codec) && !(alreadysent & cur->codec)) {
                        if (sip_debug_test_pvt(p))
                                ast_verbose("Answering with preferred capability 0x%x(%s)\n", cur->codec, ast_getformatname(cur->codec));
                        codec = ast_rtp_lookup_code(p->rtp, 1, cur->codec);