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RTCP: try to continue dissection with partial SRTCP packet 

When due to limited capture length the tailing part of the SRTCP packet
is missing it might be impossible to know the encryption status of this
packet. Before retrieving that information make sure that's even possible,
otherwise continue as if not encrypted.
This commit is contained in:
Jaap Keuter 2020-11-06 20:19:45 +01:00 committed by AndersBroman
parent 07f048f1f2
commit 57fc841aea
1 changed files with 1 additions and 1 deletions
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2
epan/dissectors/packet-rtcp.c
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@ -4323,7 +4323,7 @@ dissect_rtcp( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U
srtcp_offset = tvb_reported_length_remaining(tvb, offset) - srtcp_info->auth_tag_len - srtcp_info->mki_len - 4;
/* It has been setup as SRTCP, but skip to the SRTCP E field at the end
to see if this particular packet is encrypted or not. The E bit is the MSB. */
srtcp_index = tvb_get_ntohl(tvb,srtcp_offset);
srtcp_index = tvb_bytes_exist(tvb, srtcp_offset, 4) ? tvb_get_ntohl(tvb, srtcp_offset) : 0;
e_bit = (srtcp_index & 0x80000000) ? TRUE : FALSE;
srtcp_index &= 0x7fffffff;