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Avoid using labs() on time_t in channeltls.c

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On some windows builds, time_t is 64 bits but long is not.  This is
causing appveyor builds to fail.

Also, one of our uses of labs() on time_t was logically incorrect:
it was telling us to accept NETINFO cells up to three minutes
_before_ the message they were responding to, which doesn't make
sense.

This patch adds a time_abs() function that we should eventually move
to intmath.h or something.  For now, though, it will make merges
easier to have it file-local in channeltls.c.

Fixes bug 31343; bugfix on 0.2.4.4-alpha.
This commit is contained in:
Nick Mathewson
2019-08-06 11:11:06 -04:00
parent fb977f8cac
commit 0849d2a2fd
2 changed files with 28 additions and 4 deletions
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changes/bug31343
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o Minor bugfixes (compilation):
- Avoid using labs() on time_t, which can cause compilation warnings
on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
o Minor bugfixes (clock skew detection):
- Don't believe clock skew results from NETINFO cells that appear to
arrive before the VERSIONS cells they are responding to were sent.
Previously, we would accept them up to 3 minutes "in the past".
Fixes bug 31343; bugfix on 0.2.4.4-alpha.