Currently, the RtpTransport checks that the packet is either RTP or
RTCP. However, the RTCP check does not verify that the packet is a valid RTP,
and therefore invalid RTCP packets were allowed in the RtpTransport::OnReadPacket.
This change makes sure that the test for RTCP header (IsRtcpPacket) checks that it has the valid RTP version (2).
So far if the packet had the second byte that looked like
RTCP, it would ignore the first byte.
Bug: None
Change-Id: I5d07d497b9ef609c74b6e507c5f3e19e4bf10194
Reviewed-on: https://webrtc-review.googlesource.com/c/120646
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Bjorn Mellem <mellem@webrtc.org>
Reviewed-by: Seth Hampson <shampson@webrtc.org>
Commit-Queue: Peter Slatala <psla@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26480}