[Windows] Fixes UDS integration & caches socket domain

[davinci26]

Commit Message:

The PR aims to fix UDS integration tests on Windows. To that end the following changes were made:

1. Fix domain function usage on Windows by caching the domain from the socket creation and passing down to the io_handler.
2. Adds the correct length for UDS on Windows.
3. Enables the test.

Risk Level: Low
Testing: Existing tests
Docs Changes: N/A
Release Notes: N/A

[davinci26]

cc: @envoyproxy/windows-dev

[wrowe]

/wait

For defaults resolution

[davinci26]

@wrowe marking it as a draft to query some full builds in the CI to figure out which consumers are setting the default value for domain and see why this is the case

[davinci26]

@wrowe i expect the ci to go green and it should be ready for review

[davinci26]

clang-tidy fails due to #13162 that is coming from upstream

[wrowe]

LGTM, thanks!

[davinci26]

@envoyproxy/senior-maintainers can I also get a review from you.

[mattklein123]

LGTM with small comments, thanks.

/wait

[mattklein123]

Thanks!

[davinci26]

Looks like clang-format is not happy with the new changes. My working hypothesis is that it has some trouble with the following functions

absl::optional<uint32_t> maybeGetPacketsDroppedFromHeader(
#ifdef SO_RXQ_OVFL
    const cmsghdr& cmsg) {
  if (cmsg.cmsg_type == SO_RXQ_OVFL) {
    return *reinterpret_cast<const uint32_t*>(CMSG_DATA(&cmsg));
  }
#else
    const cmsghdr&) {
#endif
  return absl::nullopt;
}

and Address::InstanceConstSharedPtr maybeGetDstAddressFromHeader(const cmsghdr& cmsg, uint32_t self_port, os_fd_t fd) {

working in simplifying the #ifeds

[mattklein123]

If it forces it and is a bug in the formatter don't worry about it.

[davinci26]

Actually it is easy to fix if you simplify the functions above so it might be an overall win. I just transformed the #ifdefs into some constexpr functions.

Verifying my changes and pushing another commit

[davinci26]

WDYT of the changes in 509d1c3? Locally it fixes my clang-format.

[davinci26]

/retest

[repokitteh-read-only]

Retrying Azure Pipelines, to retry CircleCI checks, use /retest-circle.
Cannot retry non-completed check: envoy-presubmit (macOS), please wait.

🐱

Caused by: a #13123 (comment) was created by @davinci26.

see: more, trace.

[davinci26]

/retest

[repokitteh-read-only]

Retrying Azure Pipelines, to retry CircleCI checks, use /retest-circle.
Retried failed jobs in: envoy-presubmit

🐱

Caused by: a #13123 (comment) was created by @davinci26.

see: more, trace.

[davinci26]

@mattklein123 the CI is all green again. feel free to take a look at the last 2 commits when you get some time.

[mattklein123]

Thanks, nice cleanup!