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Diffstat (limited to 'net/netfilter/xt_connmark.c')
-rw-r--r--net/netfilter/xt_connmark.c232
1 files changed, 97 insertions, 135 deletions
diff --git a/net/netfilter/xt_connmark.c b/net/netfilter/xt_connmark.c
index aaa1b96691f..69f78e96fdb 100644
--- a/net/netfilter/xt_connmark.c
+++ b/net/netfilter/xt_connmark.c
@@ -1,10 +1,10 @@
/*
- * xt_connmark - Netfilter module to match connection mark values
+ * xt_connmark - Netfilter module to operate on connection marks
*
* Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
* by Henrik Nordstrom <hno@marasystems.com>
* Copyright © CC Computer Consultants GmbH, 2007 - 2008
- * Jan Engelhardt <jengelh@computergmbh.de>
+ * Jan Engelhardt <jengelh@medozas.de>
*
* 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
@@ -17,187 +17,149 @@
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/module.h>
#include <linux/skbuff.h>
#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_ecache.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_connmark.h>
MODULE_AUTHOR("Henrik Nordstrom <hno@marasystems.com>");
-MODULE_DESCRIPTION("Xtables: connection mark match");
+MODULE_DESCRIPTION("Xtables: connection mark operations");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_CONNMARK");
+MODULE_ALIAS("ip6t_CONNMARK");
MODULE_ALIAS("ipt_connmark");
MODULE_ALIAS("ip6t_connmark");
-static bool
-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)
+static unsigned int
+connmark_tg(struct sk_buff *skb, const struct xt_action_param *par)
{
- const struct xt_connmark_mtinfo1 *info = matchinfo;
+ const struct xt_connmark_tginfo1 *info = par->targinfo;
enum ip_conntrack_info ctinfo;
- const struct nf_conn *ct;
+ struct nf_conn *ct;
+ u_int32_t newmark;
ct = nf_ct_get(skb, &ctinfo);
if (ct == NULL)
- return false;
+ return XT_CONTINUE;
+
+ switch (info->mode) {
+ case XT_CONNMARK_SET:
+ newmark = (ct->mark & ~info->ctmask) ^ info->ctmark;
+ if (ct->mark != newmark) {
+ ct->mark = newmark;
+ nf_conntrack_event_cache(IPCT_MARK, ct);
+ }
+ break;
+ case XT_CONNMARK_SAVE:
+ newmark = (ct->mark & ~info->ctmask) ^
+ (skb->mark & info->nfmask);
+ if (ct->mark != newmark) {
+ ct->mark = newmark;
+ nf_conntrack_event_cache(IPCT_MARK, ct);
+ }
+ break;
+ case XT_CONNMARK_RESTORE:
+ newmark = (skb->mark & ~info->nfmask) ^
+ (ct->mark & info->ctmask);
+ skb->mark = newmark;
+ break;
+ }
- return ((ct->mark & info->mask) == info->mark) ^ info->invert;
+ return XT_CONTINUE;
}
-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)
+static int connmark_tg_check(const struct xt_tgchk_param *par)
{
- const struct xt_connmark_info *info = matchinfo;
- const struct nf_conn *ct;
- enum ip_conntrack_info ctinfo;
+ int ret;
- ct = nf_ct_get(skb, &ctinfo);
- if (!ct)
- return false;
+ ret = nf_ct_l3proto_try_module_get(par->family);
+ if (ret < 0)
+ pr_info("cannot load conntrack support for proto=%u\n",
+ par->family);
+ return ret;
+}
- return ((ct->mark & info->mask) == info->mark) ^ info->invert;
+static void connmark_tg_destroy(const struct xt_tgdtor_param *par)
+{
+ nf_ct_l3proto_module_put(par->family);
}
static bool
-connmark_mt_check_v0(const char *tablename, const void *ip,
- const struct xt_match *match, void *matchinfo,
- unsigned int hook_mask)
+connmark_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
- const struct xt_connmark_info *cm = matchinfo;
+ const struct xt_connmark_mtinfo1 *info = par->matchinfo;
+ enum ip_conntrack_info ctinfo;
+ const struct nf_conn *ct;
- if (cm->mark > 0xffffffff || cm->mask > 0xffffffff) {
- printk(KERN_WARNING "connmark: only support 32bit mark\n");
- return false;
- }
- if (nf_ct_l3proto_try_module_get(match->family) < 0) {
- printk(KERN_WARNING "can't load conntrack support for "
- "proto=%u\n", match->family);
+ ct = nf_ct_get(skb, &ctinfo);
+ if (ct == NULL)
return false;
- }
- return true;
+
+ return ((ct->mark & info->mask) == info->mark) ^ info->invert;
}
-static bool
-connmark_mt_check(const char *tablename, const void *ip,
- const struct xt_match *match, void *matchinfo,
- unsigned int hook_mask)
+static int connmark_mt_check(const struct xt_mtchk_param *par)
{
- 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;
+ int ret;
+
+ ret = nf_ct_l3proto_try_module_get(par->family);
+ if (ret < 0)
+ pr_info("cannot load conntrack support for proto=%u\n",
+ par->family);
+ return ret;
}
-static void
-connmark_mt_destroy(const struct xt_match *match, void *matchinfo)
+static void connmark_mt_destroy(const struct xt_mtdtor_param *par)
{
- nf_ct_l3proto_module_put(match->family);
+ nf_ct_l3proto_module_put(par->family);
}
-#ifdef CONFIG_COMPAT
-struct compat_xt_connmark_info {
- compat_ulong_t mark, mask;
- u_int8_t invert;
- u_int8_t __pad1;
- u_int16_t __pad2;
+static struct xt_target connmark_tg_reg __read_mostly = {
+ .name = "CONNMARK",
+ .revision = 1,
+ .family = NFPROTO_UNSPEC,
+ .checkentry = connmark_tg_check,
+ .target = connmark_tg,
+ .targetsize = sizeof(struct xt_connmark_tginfo1),
+ .destroy = connmark_tg_destroy,
+ .me = THIS_MODULE,
};
-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 = {
- .mark = cm->mark,
- .mask = cm->mask,
- .invert = cm->invert,
- };
- memcpy(dst, &m, sizeof(m));
-}
-
-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 = {
- .mark = m->mark,
- .mask = m->mask,
- .invert = m->invert,
- };
- return copy_to_user(dst, &cm, sizeof(cm)) ? -EFAULT : 0;
-}
-#endif /* CONFIG_COMPAT */
-
-static struct xt_match connmark_mt_reg[] __read_mostly = {
- {
- .name = "connmark",
- .revision = 0,
- .family = AF_INET,
- .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 = 0,
- .family = AF_INET6,
- .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 struct xt_match connmark_mt_reg __read_mostly = {
+ .name = "connmark",
+ .revision = 1,
+ .family = NFPROTO_UNSPEC,
+ .checkentry = connmark_mt_check,
+ .match = connmark_mt,
+ .matchsize = sizeof(struct xt_connmark_mtinfo1),
+ .destroy = connmark_mt_destroy,
+ .me = THIS_MODULE,
};
static int __init connmark_mt_init(void)
{
- return xt_register_matches(connmark_mt_reg,
- ARRAY_SIZE(connmark_mt_reg));
+ int ret;
+
+ ret = xt_register_target(&connmark_tg_reg);
+ if (ret < 0)
+ return ret;
+ ret = xt_register_match(&connmark_mt_reg);
+ if (ret < 0) {
+ xt_unregister_target(&connmark_tg_reg);
+ return ret;
+ }
+ return 0;
}
static void __exit connmark_mt_exit(void)
{
- xt_unregister_matches(connmark_mt_reg, ARRAY_SIZE(connmark_mt_reg));
+ xt_unregister_match(&connmark_mt_reg);
+ xt_unregister_target(&connmark_tg_reg);
}
module_init(connmark_mt_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 03:44:34 +0000