ia64/linux-2.6.18-xen.hg

view net/netfilter/xt_connmark.c @ 912:dd42cdb0ab89

[IA64] Build blktap2 driver by default in x86 builds.

add CONFIG_XEN_BLKDEV_TAP2=y to buildconfigs/linux-defconfig_xen_ia64.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Mon Jun 29 12:09:16 2009 +0900 (2009-06-29)
parents 831230e53067
children
line source
1 /* This kernel module matches connection mark values set by the
2 * CONNMARK target
3 *
4 * Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
5 * by Henrik Nordstrom <hno@marasystems.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
22 #include <linux/module.h>
23 #include <linux/skbuff.h>
25 MODULE_AUTHOR("Henrik Nordstrom <hno@marasytems.com>");
26 MODULE_DESCRIPTION("IP tables connmark match module");
27 MODULE_LICENSE("GPL");
28 MODULE_ALIAS("ipt_connmark");
30 #include <linux/netfilter/x_tables.h>
31 #include <linux/netfilter/xt_connmark.h>
32 #include <net/netfilter/nf_conntrack_compat.h>
34 static int
35 match(const struct sk_buff *skb,
36 const struct net_device *in,
37 const struct net_device *out,
38 const struct xt_match *match,
39 const void *matchinfo,
40 int offset,
41 unsigned int protoff,
42 int *hotdrop)
43 {
44 const struct xt_connmark_info *info = matchinfo;
45 u_int32_t ctinfo;
46 const u_int32_t *ctmark = nf_ct_get_mark(skb, &ctinfo);
47 if (!ctmark)
48 return 0;
50 return (((*ctmark) & info->mask) == info->mark) ^ info->invert;
51 }
53 static int
54 checkentry(const char *tablename,
55 const void *ip,
56 const struct xt_match *match,
57 void *matchinfo,
58 unsigned int matchsize,
59 unsigned int hook_mask)
60 {
61 struct xt_connmark_info *cm = matchinfo;
63 if (cm->mark > 0xffffffff || cm->mask > 0xffffffff) {
64 printk(KERN_WARNING "connmark: only support 32bit mark\n");
65 return 0;
66 }
67 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
68 if (nf_ct_l3proto_try_module_get(match->family) < 0) {
69 printk(KERN_WARNING "can't load nf_conntrack support for "
70 "proto=%d\n", match->family);
71 return 0;
72 }
73 #endif
74 return 1;
75 }
77 static void
78 destroy(const struct xt_match *match, void *matchinfo, unsigned int matchsize)
79 {
80 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
81 nf_ct_l3proto_module_put(match->family);
82 #endif
83 }
85 static struct xt_match connmark_match = {
86 .name = "connmark",
87 .match = match,
88 .matchsize = sizeof(struct xt_connmark_info),
89 .checkentry = checkentry,
90 .destroy = destroy,
91 .family = AF_INET,
92 .me = THIS_MODULE
93 };
95 static struct xt_match connmark6_match = {
96 .name = "connmark",
97 .match = match,
98 .matchsize = sizeof(struct xt_connmark_info),
99 .checkentry = checkentry,
100 .destroy = destroy,
101 .family = AF_INET6,
102 .me = THIS_MODULE
103 };
105 static int __init xt_connmark_init(void)
106 {
107 int ret;
109 need_conntrack();
111 ret = xt_register_match(&connmark_match);
112 if (ret)
113 return ret;
115 ret = xt_register_match(&connmark6_match);
116 if (ret)
117 xt_unregister_match(&connmark_match);
118 return ret;
119 }
121 static void __exit xt_connmark_fini(void)
122 {
123 xt_unregister_match(&connmark6_match);
124 xt_unregister_match(&connmark_match);
125 }
127 module_init(xt_connmark_init);
128 module_exit(xt_connmark_fini);