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chan_sip: Decline image streams on unsupported transports

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This change allows chan_sip to decline individual image streams over
unsupported transports in the SDP of the 200 response. Previously,
an image stream offer with RTP/AVP as the transport would cause
chan_sip to respond with a 488.

(closes issue ASTERISK-22988)
Reported by: adomjan
Original patch by: adomjan
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Merged revisions 406170 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 406171 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/12@406172 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kinsey Moore
2014-01-22 18:32:21 +00:00
parent e445cc726e
commit e2826acf41
1 changed files with 12 additions and 0 deletions
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12
channels/chan_sip.c
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@@ -10507,6 +10507,18 @@ static int process_sdp(struct sip_pvt *p, struct sip_request *req, int t38action
* respond with the EC they want to use */
ast_udptl_set_error_correction_scheme(p->udptl, UDPTL_ERROR_CORRECTION_NONE);
}
} else if (sscanf(m, "image %30u %17s t38%n", &x, protocol, &len) == 2 && len > 0) {
ast_log(LOG_WARNING, "Declining image stream due to unsupported transport: %s\n", m);
/* produce zero-port m-line since this is guaranteed to be declined
* length is "m=image 0 strlen(protocol) t38" + "\r\n\0" */
if (!(offer->decline_m_line = ast_malloc(10 + strlen(protocol) + 7))) {
ast_log(LOG_WARNING, "Failed to allocate memory for SDP offer declination\n");
res = -1;
goto process_sdp_cleanup;
}
/* guaranteed to be exactly the right length */
sprintf(offer->decline_m_line, "m=image 0 %s t38\r\n", protocol);
continue;
} else {
ast_log(LOG_WARNING, "Rejecting image media offer due to invalid or unsupported syntax: %s\n", m);
res = -1;