netxlite: call getaddrinfo and handle platform-specific oddities (#764)

This commit changes our system resolver to call getaddrinfo directly when CGO is enabled. This change allows us to:

1. obtain the CNAME easily

2. obtain the real getaddrinfo retval

3. handle platform specific oddities such as `EAI_NODATA`
returned on Android devices

See https://github.com/ooni/probe/issues/2029 and https://github.com/ooni/probe/issues/2029#issuecomment-1140258729 in particular.

See https://github.com/ooni/probe/issues/2033 for documentation regarding the desire to see `getaddrinfo`'s retval.

See https://github.com/ooni/probe/issues/2118 for possible follow-up changes.
This commit is contained in:
Simone Basso 2022-05-28 15:10:30 +02:00 committed by GitHub
commit cf6dbe48e0
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36 changed files with 1259 additions and 59 deletions

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@ -1,5 +1,5 @@
// Code generated by go generate; DO NOT EDIT.
// Generated: 2022-05-19 20:30:45.642498 +0200 CEST m=+0.472425168
// Generated: 2022-05-28 13:27:21.967785506 +0200 CEST m=+0.209153549
package netxlite