[PATCH 3/4] skip sizechecking when not specified

[Pablo Neira]

This patch applies to nfnetlink. Skip sizecheck if the size of the
attribute wasn't specified, ie. zero.

Signed-off-by: Pablo Neira Ayuso <pablo at netfilter.org>

-- 
The dawn of the fourth age of Linux firewalling is coming; a time of
great struggle and heroic deeds -- J.Kadlecsik got inspired by J.Morris
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Skip sizecheck if the size of the attribute wasn't specified, ie. zero.

Signed-off-by: Pablo Neira Ayuso <pablo at netfilter.org>

Index: netfilter-2.6.14.git/include/linux/netfilter/nfnetlink.h
===================================================================
--- netfilter-2.6.14.git.orig/include/linux/netfilter/nfnetlink.h	2005-11-06 19:31:06.000000000 +0100
+++ netfilter-2.6.14.git/include/linux/netfilter/nfnetlink.h	2005-11-06 19:31:28.000000000 +0100
@@ -154,11 +154,14 @@ extern void nfattr_parse(struct nfattr *
 
 #define nfattr_bad_size(tb, max, cta_min)				\
 ({	int __i, __res = 0;						\
- 	for (__i=0; __i<max; __i++) 					\
+ 	for (__i=0; __i<max; __i++) {					\
+ 		if (!cta_min[__i])					\
+ 			continue;					\
  		if (tb[__i] && NFA_PAYLOAD(tb[__i]) < cta_min[__i]){	\
  			__res = 1;					\
  			break;						\
  		}							\
+ 	}								\
  	__res;								\
 })