Date: Sun, 25 Oct 2015 13:14:54 +0000 (UTC) From: Kristof Provost <kp@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r289932 - head/sys/net Message-ID: <201510251314.t9PDEsV6053440@repo.freebsd.org>
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Author: kp Date: Sun Oct 25 13:14:53 2015 New Revision: 289932 URL: https://svnweb.freebsd.org/changeset/base/289932 Log: PF_ANEQ() macro will in most situations returns TRUE comparing two identical IPv4 packets (when it should return FALSE). It happens because PF_ANEQ() doesn't stop if first 32 bits of IPv4 packets are equal and starts to check next 3*32 bits (like for IPv6 packet). Those bits containt some garbage and in result PF_ANEQ() wrongly returns TRUE. Fix: Check if packet is of AF_INET type and if it is then compare only first 32 bits of data. PR: 204005 Submitted by: Miłosz Kaniewski Modified: head/sys/net/pfvar.h Modified: head/sys/net/pfvar.h ============================================================================== --- head/sys/net/pfvar.h Sun Oct 25 12:09:28 2015 (r289931) +++ head/sys/net/pfvar.h Sun Oct 25 13:14:53 2015 (r289932) @@ -198,10 +198,11 @@ extern struct rwlock pf_rules_lock; (a)->addr32[0] == (b)->addr32[0])) \ #define PF_ANEQ(a, b, c) \ - ((a)->addr32[0] != (b)->addr32[0] || \ + ((c == AF_INET && (a)->addr32[0] != (b)->addr32[0]) || \ + (c == AF_INET6 && (a)->addr32[3] != (b)->addr32[3] && \ (a)->addr32[1] != (b)->addr32[1] || \ (a)->addr32[2] != (b)->addr32[2] || \ - (a)->addr32[3] != (b)->addr32[3]) \ + (a)->addr32[3] != (b)->addr32[3])) \ #define PF_AZERO(a, c) \ ((c == AF_INET && !(a)->addr32[0]) || \
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