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res_pjsip_sdp_rtp: Reject offer of required SRTP without res_srtp.

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When optimistic SRTP was on it was possible for us to still
set up a call without an audio stream if an offer was received
with required SRTP.

This change makes it so this scenario will now fail with a 488
response.

ASTERISK-26575

Change-Id: I7d14187037681f48879bd20319ac79d0877318f3
This commit is contained in:
Joshua Colp
2016-11-10 16:57:49 +00:00
parent e77aa78dc7
commit 1bd49040c4
1 changed files with 4 additions and 2 deletions
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6
res/res_pjsip_sdp_rtp.c
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@@ -909,9 +909,11 @@ static int negotiate_incoming_sdp_stream(struct ast_sip_session *session, struct
res = setup_media_encryption(session, session_media, sdp, stream);
if (res) {
if (!session->endpoint->media.rtp.encryption_optimistic) {
if (!session->endpoint->media.rtp.encryption_optimistic ||
!pj_strncmp2(&stream->desc.transport, "RTP/SAVP", 8)) {
/* If optimistic encryption is disabled and crypto should have been enabled
* but was not this session must fail.
* but was not this session must fail. This must also fail if crypto was
* required in the offer but could not be set up.
*/
return -1;
}