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82 lines
3.2 KiB
82 lines
3.2 KiB
From 5d2e24d37d56eef0570aca06b590079527678707 Mon Sep 17 00:00:00 2001
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From: Florian Westphal <fw@strlen.de>
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Date: Fri, 3 Nov 2023 17:33:22 +0100
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Subject: [PATCH] arptables-nft: remove ARPT_INV flags usage
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ARPT_ and IPT_INV flags are not interchangeable, e.g.:
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define IPT_INV_SRCDEVADDR 0x0080
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define ARPT_INV_SRCDEVADDR 0x0010
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as these flags can be tested by libarp_foo.so such checks can yield
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incorrect results.
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Because arptables-nft uses existing code, e.g. xt_mark, it makes
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sense to unify this completely by converting the last users of
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ARPT_INV_ constants.
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Note that arptables-legacy does not do run-time module loading via
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dlopen(). Functionaliy implemented by "extensions" in the
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arptables-legacy git tree are built-in, so this doesn't break
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arptables-legacy binaries.
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Fixes: 44457c080590 ("xtables-arp: Don't use ARPT_INV_*")
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Signed-off-by: Florian Westphal <fw@strlen.de>
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Signed-off-by: Phil Sutter <phil@nwl.cc>
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(cherry picked from commit 3493d40cbba9dbfc00018b419241c93646a97a68)
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---
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extensions/libarpt_mangle.c | 4 ++--
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iptables/nft-arp.c | 2 +-
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iptables/xshared.h | 4 +++-
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3 files changed, 6 insertions(+), 4 deletions(-)
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diff --git a/extensions/libarpt_mangle.c b/extensions/libarpt_mangle.c
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index 765edf34781f3..a846e97ec8f27 100644
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--- a/extensions/libarpt_mangle.c
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+++ b/extensions/libarpt_mangle.c
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@@ -77,7 +77,7 @@ arpmangle_parse(int c, char **argv, int invert, unsigned int *flags,
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if (e->arp.arhln_mask == 0)
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xtables_error(PARAMETER_PROBLEM,
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"no --h-length defined");
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- if (e->arp.invflags & ARPT_INV_ARPHLN)
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+ if (e->arp.invflags & IPT_INV_ARPHLN)
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xtables_error(PARAMETER_PROBLEM,
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"! --h-length not allowed for "
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"--mangle-mac-s");
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@@ -95,7 +95,7 @@ arpmangle_parse(int c, char **argv, int invert, unsigned int *flags,
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if (e->arp.arhln_mask == 0)
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xtables_error(PARAMETER_PROBLEM,
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"no --h-length defined");
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- if (e->arp.invflags & ARPT_INV_ARPHLN)
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+ if (e->arp.invflags & IPT_INV_ARPHLN)
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xtables_error(PARAMETER_PROBLEM,
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"! hln not allowed for --mangle-mac-d");
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if (e->arp.arhln != 6)
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diff --git a/iptables/nft-arp.c b/iptables/nft-arp.c
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index aed39ebdd5166..535dd6b83237b 100644
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--- a/iptables/nft-arp.c
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+++ b/iptables/nft-arp.c
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@@ -490,7 +490,7 @@ static void nft_arp_post_parse(int command,
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&args->d.naddrs);
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if ((args->s.naddrs > 1 || args->d.naddrs > 1) &&
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- (cs->arp.arp.invflags & (ARPT_INV_SRCIP | ARPT_INV_TGTIP)))
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+ (cs->arp.arp.invflags & (IPT_INV_SRCIP | IPT_INV_DSTIP)))
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xtables_error(PARAMETER_PROBLEM,
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"! not allowed with multiple"
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" source or destination IP addresses");
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diff --git a/iptables/xshared.h b/iptables/xshared.h
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index a200e0d620ad3..5586385456a4d 100644
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--- a/iptables/xshared.h
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+++ b/iptables/xshared.h
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@@ -80,7 +80,9 @@ struct xtables_target;
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#define ARPT_OPTSTRING OPTSTRING_COMMON "R:S::" "h::l:nvx" /* "m:" */
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#define EBT_OPTSTRING OPTSTRING_COMMON "hv"
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-/* define invflags which won't collide with IPT ones */
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+/* define invflags which won't collide with IPT ones.
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+ * arptables-nft does NOT use the legacy ARPT_INV_* defines.
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+ */
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#define IPT_INV_SRCDEVADDR 0x0080
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#define IPT_INV_TGTDEVADDR 0x0100
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#define IPT_INV_ARPHLN 0x0200
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