f7108a20de
The function signatures for Xtables extensions have grown over time. It involves a lot of typing/replication, and also a bit of stack space even if they are not used. Realize an NFWS2008 idea and pack them into structs. The skb remains outside of the struct so gcc can continue to apply its optimizations. This patch does this for match extensions' match functions. A few ambiguities have also been addressed. The "offset" parameter for example has been renamed to "fragoff" (there are so many different offsets already) and "protoff" to "thoff" (there is more than just one protocol here, so clarify). Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/*
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* Implements a dummy match to allow attaching comments to rules
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*
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* 2003-05-13 Brad Fisher (brad@info-link.net)
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*/
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/netfilter/x_tables.h>
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#include <linux/netfilter/xt_comment.h>
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MODULE_AUTHOR("Brad Fisher <brad@info-link.net>");
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MODULE_DESCRIPTION("Xtables: No-op match which can be tagged with a comment");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("ipt_comment");
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MODULE_ALIAS("ip6t_comment");
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static bool
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comment_mt(const struct sk_buff *skb, const struct xt_match_param *par)
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{
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/* We always match */
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return true;
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}
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static struct xt_match comment_mt_reg[] __read_mostly = {
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{
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.name = "comment",
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.family = NFPROTO_IPV4,
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.match = comment_mt,
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.matchsize = sizeof(struct xt_comment_info),
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.me = THIS_MODULE
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},
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{
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.name = "comment",
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.family = NFPROTO_IPV6,
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.match = comment_mt,
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.matchsize = sizeof(struct xt_comment_info),
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.me = THIS_MODULE
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},
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};
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static int __init comment_mt_init(void)
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{
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return xt_register_matches(comment_mt_reg, ARRAY_SIZE(comment_mt_reg));
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}
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static void __exit comment_mt_exit(void)
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{
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xt_unregister_matches(comment_mt_reg, ARRAY_SIZE(comment_mt_reg));
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}
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module_init(comment_mt_init);
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module_exit(comment_mt_exit);
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