tree 7870cd0b936dd547a599cfcb4ec3726158b28184
parent 3e2decc8e69cdd2a525c81472e950d0f6c499aac
author Victor Boivie <boivie@webrtc.org> 1617258234 +0200
committer Commit Bot <commit-bot@chromium.org> 1617399493 +0000

dcsctp: Add strong typed identifiers

There are numerous identifiers and sequences in SCTP, all of them being
unsigned 16 or 32-bit integers.

  * Stream identifiers
  * Payload Protocol Identifier (PPID)
  * Stream Sequence Numbers (SSN)
  * Message Identifiers (MID)
  * Fragment Sequence Numbers (FSN)
  * Transmission Sequence Numbers (TSN)

The first two of these are publicly exposed in the API, and the
remaining ones are never exposed to the client and are all part of SCTP
protocol.

Then there are some more not as common sequence numbers, and some
booleans. Not all will be in internal_types.h - it depends on if they
can be scoped to a specific component instead. And not all types will
likely become strong types.

The unwrapped sequence numbers have been renamed to not cause conflicts
and the current UnwrappedSequenceNumber class doesn't support wrapping
strongly typed integers as it can't reach into the type of the
underlying integer. That's something to explore later.

Bug: webrtc:12614
Change-Id: I4e0016be26d5d4826783d6e0962044f56cbfa97d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/213422
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@{#33620}