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Message-ID: <20150616192504.GF3247@euler>
Date: Tue, 16 Jun 2015 21:25:04 +0200
From: Felix Janda <felix.janda@...teo.de>
To: netfilter-devel@...r.kernel.org
Cc: musl@...ts.openwall.com
Subject: [PATCH iptables RFC 4/4] libxt_TCPOPTSTRIP: Use local copy of
TCPOPTS constants
musl does not provide these constants in <netinet/tcp.h>
Signed-off-by: Felix Janda <felix.janda@...teo.de>
---
It is not clear to me whether these constants belong to iptables or musl's
netinet/tcp.h. So this message is CC'd to the musl list.
In the code indexed by debian code search I have only found iptables and
traceroute using them without having a local copy of tcp.h.
Note that this patch is incomplete: utils/nfsynproxy.c uses them as well
---
extensions/libxt_TCPOPTSTRIP.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/extensions/libxt_TCPOPTSTRIP.c b/extensions/libxt_TCPOPTSTRIP.c
index 6897857..1617081 100644
--- a/extensions/libxt_TCPOPTSTRIP.c
+++ b/extensions/libxt_TCPOPTSTRIP.c
@@ -7,11 +7,14 @@
#include <stdio.h>
#include <string.h>
#include <xtables.h>
-#include <netinet/tcp.h>
#include <linux/netfilter/xt_TCPOPTSTRIP.h>
-#ifndef TCPOPT_MD5SIG
-# define TCPOPT_MD5SIG 19
-#endif
+
+#define TCPOPT_MAXSEG 2
+#define TCPOPT_WINDOW 3
+#define TCPOPT_SACK_PERMITTED 4
+#define TCPOPT_SACK 5
+#define TCPOPT_TIMESTAMP 8
+#define TCPOPT_MD5SIG 19
enum {
O_STRIP_OPTION = 0,
--
2.3.6
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