X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=net%2Fnetfilter%2Fxt_connmark.c;h=aaa1b96691f942c43dd393945264917c661c49fd;hb=a866bbf6aacf95f849810079442a20be118ce905;hp=1071fc54d6d3c8811f4404773636ec15083d9cc3;hpb=4fa435018d740cb83d74c92306aa1f796da91ddd;p=linux-2.6-omap-h63xx.git diff --git a/net/netfilter/xt_connmark.c b/net/netfilter/xt_connmark.c index 1071fc54d6d..aaa1b96691f 100644 --- a/net/netfilter/xt_connmark.c +++ b/net/netfilter/xt_connmark.c @@ -1,8 +1,10 @@ -/* This kernel module matches connection mark values set by the - * CONNMARK target +/* + * xt_connmark - Netfilter module to match connection mark values * - * Copyright (C) 2002,2004 MARA Systems AB - * by Henrik Nordstrom + * Copyright (C) 2002,2004 MARA Systems AB + * by Henrik Nordstrom + * Copyright © CC Computer Consultants GmbH, 2007 - 2008 + * Jan Engelhardt * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -25,21 +27,34 @@ #include #include -MODULE_AUTHOR("Henrik Nordstrom "); -MODULE_DESCRIPTION("IP tables connmark match module"); +MODULE_AUTHOR("Henrik Nordstrom "); +MODULE_DESCRIPTION("Xtables: connection mark match"); MODULE_LICENSE("GPL"); MODULE_ALIAS("ipt_connmark"); MODULE_ALIAS("ip6t_connmark"); static bool -match(const struct sk_buff *skb, - const struct net_device *in, - const struct net_device *out, - const struct xt_match *match, - const void *matchinfo, - int offset, - unsigned int protoff, - bool *hotdrop) +connmark_mt(const struct sk_buff *skb, const struct net_device *in, + const struct net_device *out, const struct xt_match *match, + const void *matchinfo, int offset, unsigned int protoff, + bool *hotdrop) +{ + const struct xt_connmark_mtinfo1 *info = matchinfo; + enum ip_conntrack_info ctinfo; + const struct nf_conn *ct; + + ct = nf_ct_get(skb, &ctinfo); + if (ct == NULL) + return false; + + return ((ct->mark & info->mask) == info->mark) ^ info->invert; +} + +static bool +connmark_mt_v0(const struct sk_buff *skb, const struct net_device *in, + const struct net_device *out, const struct xt_match *match, + const void *matchinfo, int offset, unsigned int protoff, + bool *hotdrop) { const struct xt_connmark_info *info = matchinfo; const struct nf_conn *ct; @@ -53,11 +68,9 @@ match(const struct sk_buff *skb, } static bool -checkentry(const char *tablename, - const void *ip, - const struct xt_match *match, - void *matchinfo, - unsigned int hook_mask) +connmark_mt_check_v0(const char *tablename, const void *ip, + const struct xt_match *match, void *matchinfo, + unsigned int hook_mask) { const struct xt_connmark_info *cm = matchinfo; @@ -67,14 +80,27 @@ checkentry(const char *tablename, } if (nf_ct_l3proto_try_module_get(match->family) < 0) { printk(KERN_WARNING "can't load conntrack support for " - "proto=%d\n", match->family); + "proto=%u\n", match->family); + return false; + } + return true; +} + +static bool +connmark_mt_check(const char *tablename, const void *ip, + const struct xt_match *match, void *matchinfo, + unsigned int hook_mask) +{ + if (nf_ct_l3proto_try_module_get(match->family) < 0) { + printk(KERN_WARNING "cannot load conntrack support for " + "proto=%u\n", match->family); return false; } return true; } static void -destroy(const struct xt_match *match, void *matchinfo) +connmark_mt_destroy(const struct xt_match *match, void *matchinfo) { nf_ct_l3proto_module_put(match->family); } @@ -87,7 +113,7 @@ struct compat_xt_connmark_info { u_int16_t __pad2; }; -static void compat_from_user(void *dst, void *src) +static void connmark_mt_compat_from_user_v0(void *dst, void *src) { const struct compat_xt_connmark_info *cm = src; struct xt_connmark_info m = { @@ -98,7 +124,7 @@ static void compat_from_user(void *dst, void *src) memcpy(dst, &m, sizeof(m)); } -static int compat_to_user(void __user *dst, void *src) +static int connmark_mt_compat_to_user_v0(void __user *dst, void *src) { const struct xt_connmark_info *m = src; struct compat_xt_connmark_info cm = { @@ -110,42 +136,69 @@ static int compat_to_user(void __user *dst, void *src) } #endif /* CONFIG_COMPAT */ -static struct xt_match xt_connmark_match[] __read_mostly = { +static struct xt_match connmark_mt_reg[] __read_mostly = { { .name = "connmark", + .revision = 0, .family = AF_INET, - .checkentry = checkentry, - .match = match, - .destroy = destroy, + .checkentry = connmark_mt_check_v0, + .match = connmark_mt_v0, + .destroy = connmark_mt_destroy, .matchsize = sizeof(struct xt_connmark_info), #ifdef CONFIG_COMPAT .compatsize = sizeof(struct compat_xt_connmark_info), - .compat_from_user = compat_from_user, - .compat_to_user = compat_to_user, + .compat_from_user = connmark_mt_compat_from_user_v0, + .compat_to_user = connmark_mt_compat_to_user_v0, #endif .me = THIS_MODULE }, { .name = "connmark", + .revision = 0, .family = AF_INET6, - .checkentry = checkentry, - .match = match, - .destroy = destroy, + .checkentry = connmark_mt_check_v0, + .match = connmark_mt_v0, + .destroy = connmark_mt_destroy, .matchsize = sizeof(struct xt_connmark_info), +#ifdef CONFIG_COMPAT + .compatsize = sizeof(struct compat_xt_connmark_info), + .compat_from_user = connmark_mt_compat_from_user_v0, + .compat_to_user = connmark_mt_compat_to_user_v0, +#endif .me = THIS_MODULE }, + { + .name = "connmark", + .revision = 1, + .family = AF_INET, + .checkentry = connmark_mt_check, + .match = connmark_mt, + .matchsize = sizeof(struct xt_connmark_mtinfo1), + .destroy = connmark_mt_destroy, + .me = THIS_MODULE, + }, + { + .name = "connmark", + .revision = 1, + .family = AF_INET6, + .checkentry = connmark_mt_check, + .match = connmark_mt, + .matchsize = sizeof(struct xt_connmark_mtinfo1), + .destroy = connmark_mt_destroy, + .me = THIS_MODULE, + }, }; -static int __init xt_connmark_init(void) +static int __init connmark_mt_init(void) { - return xt_register_matches(xt_connmark_match, - ARRAY_SIZE(xt_connmark_match)); + return xt_register_matches(connmark_mt_reg, + ARRAY_SIZE(connmark_mt_reg)); } -static void __exit xt_connmark_fini(void) +static void __exit connmark_mt_exit(void) { - xt_unregister_matches(xt_connmark_match, ARRAY_SIZE(xt_connmark_match)); + xt_unregister_matches(connmark_mt_reg, ARRAY_SIZE(connmark_mt_reg)); } -module_init(xt_connmark_init); -module_exit(xt_connmark_fini); +module_init(connmark_mt_init); +module_exit(connmark_mt_exit);