for (partially) parsing DTLS packets and extracting the msg_seqs
BUG=webrtc:367395350
Change-Id: Ieb0fc121c6dc82118ced5939c1a9ebe2d72e3cb3
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/370181
Commit-Queue: Philipp Hancke <phancke@meta.com>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Jonas Oreland <jonaso@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#43501}
