commit 7d3c49a171d47ec0adeca8ea2802661e4b4c27c6
author Victor Boivie <boivie@webrtc.org> Thu Mar 25 12:11:03 2021
committer Commit Bot <commit-bot@chromium.org> Wed Mar 31 08:27:37 2021
tree c034302bdd8d02997ca962a18ddaf571f41b9fc9
parent ff0fb4a5fafabc287a2b05f908c80529fc0df340

dcsctp: Add bounded byte reader and writer

Packets, chunks, parameters and error causes - the SCTP entities
that are sent on the wire - are buffers with fields that are stored
in big endian and that generally consist of a fixed header size, and
a variable sized part, that can e.g. be encoded sub-fields or
serialized strings.

The BoundedByteReader and BoundedByteWriter utilities make it easy
to read those fields with as much aid from the compiler as possible,
by having compile-time assertions that fields are not accessed
outside the buffer's span.

There are some byte reading functionality already in modules/rtp_rtcp,
but that module would be a bit unfortunate to depend on, and doesn't
have the compile time bounds checking that is the biggest feature of
this abstraction of an rtc::ArrayView.

Bug: webrtc:12614
Change-Id: I9fc641aff22221018dda9add4e2c44853c0f64f0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/212967
Commit-Queue: Victor Boivie <boivie@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Tommi <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33597}