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pf: when extracting an IPv6 address, make sure we got an IPv6 address

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Our code assumes that when we're configured to get IPv6 addresses
out of a TRANS_PF transparent proxy connection, we actually will.
But we didn't check that, and so FreeBSD started warning us about a
potential NULL pointer dereference.

Fixes part of bug 31687; bugfix on 0.2.3.4-alpha when this code was
added.
This commit is contained in:
Nick Mathewson
2019-09-10 11:07:25 -04:00
parent 51475aee57
commit 97f7efa9e3
2 changed files with 10 additions and 2 deletions
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changes/ticket31687_2
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o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
- When extracting an IPv6 address from a PF-based proxy, verify
that we are actually configured to receive an IPv6 address,
and log an internal error if not. Fixes part of bug 31687;
bugfix on 0.2.3.4-alpha.