-/* This kernel module is used to modify the connection mark values, or
- * to optionally restore the skb nfmark from the connection mark
+/*
+ * xt_CONNMARK - Netfilter module to modify the connection mark values
*
- * Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
- * by Henrik Nordstrom <hno@marasystems.com>
+ * 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>
*
* 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
#include <net/checksum.h>
MODULE_AUTHOR("Henrik Nordstrom <hno@marasystems.com>");
-MODULE_DESCRIPTION("IP tables CONNMARK matching module");
+MODULE_DESCRIPTION("Xtables: connection mark modification");
MODULE_LICENSE("GPL");
MODULE_ALIAS("ipt_CONNMARK");
MODULE_ALIAS("ip6t_CONNMARK");
#include <net/netfilter/nf_conntrack_ecache.h>
static unsigned int
-connmark_tg(struct sk_buff *skb, const struct net_device *in,
- const struct net_device *out, unsigned int hooknum,
- const struct xt_target *target, const void *targinfo)
+connmark_tg_v0(struct sk_buff *skb, const struct xt_target_param *par)
{
- const struct xt_connmark_target_info *markinfo = targinfo;
+ const struct xt_connmark_target_info *markinfo = par->targinfo;
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
u_int32_t diff;
newmark = (ct->mark & ~markinfo->mask) | markinfo->mark;
if (newmark != ct->mark) {
ct->mark = newmark;
- nf_conntrack_event_cache(IPCT_MARK, skb);
+ nf_conntrack_event_cache(IPCT_MARK, ct);
}
break;
case XT_CONNMARK_SAVE:
(skb->mark & markinfo->mask);
if (ct->mark != newmark) {
ct->mark = newmark;
- nf_conntrack_event_cache(IPCT_MARK, skb);
+ nf_conntrack_event_cache(IPCT_MARK, ct);
}
break;
case XT_CONNMARK_RESTORE:
return XT_CONTINUE;
}
-static bool
-connmark_tg_check(const char *tablename, const void *entry,
- const struct xt_target *target, void *targinfo,
- unsigned int hook_mask)
+static unsigned int
+connmark_tg(struct sk_buff *skb, const struct xt_target_param *par)
+{
+ const struct xt_connmark_tginfo1 *info = par->targinfo;
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct;
+ u_int32_t newmark;
+
+ ct = nf_ct_get(skb, &ctinfo);
+ if (ct == NULL)
+ 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 XT_CONTINUE;
+}
+
+static bool connmark_tg_check_v0(const struct xt_tgchk_param *par)
{
- const struct xt_connmark_target_info *matchinfo = targinfo;
+ const struct xt_connmark_target_info *matchinfo = par->targinfo;
if (matchinfo->mode == XT_CONNMARK_RESTORE) {
- if (strcmp(tablename, "mangle") != 0) {
+ if (strcmp(par->table, "mangle") != 0) {
printk(KERN_WARNING "CONNMARK: restore can only be "
"called from \"mangle\" table, not \"%s\"\n",
- tablename);
+ par->table);
return false;
}
}
printk(KERN_WARNING "CONNMARK: Only supports 32bit mark\n");
return false;
}
- if (nf_ct_l3proto_try_module_get(target->family) < 0) {
+ if (nf_ct_l3proto_try_module_get(par->family) < 0) {
printk(KERN_WARNING "can't load conntrack support for "
- "proto=%d\n", target->family);
+ "proto=%u\n", par->family);
+ return false;
+ }
+ return true;
+}
+
+static bool connmark_tg_check(const struct xt_tgchk_param *par)
+{
+ if (nf_ct_l3proto_try_module_get(par->family) < 0) {
+ printk(KERN_WARNING "cannot load conntrack support for "
+ "proto=%u\n", par->family);
return false;
}
return true;
}
-static void
-connmark_tg_destroy(const struct xt_target *target, void *targinfo)
+static void connmark_tg_destroy(const struct xt_tgdtor_param *par)
{
- nf_ct_l3proto_module_put(target->family);
+ nf_ct_l3proto_module_put(par->family);
}
#ifdef CONFIG_COMPAT
u_int16_t __pad2;
};
-static void connmark_tg_compat_from_user(void *dst, void *src)
+static void connmark_tg_compat_from_user_v0(void *dst, void *src)
{
const struct compat_xt_connmark_target_info *cm = src;
struct xt_connmark_target_info m = {
memcpy(dst, &m, sizeof(m));
}
-static int connmark_tg_compat_to_user(void __user *dst, void *src)
+static int connmark_tg_compat_to_user_v0(void __user *dst, void *src)
{
const struct xt_connmark_target_info *m = src;
struct compat_xt_connmark_target_info cm = {
static struct xt_target connmark_tg_reg[] __read_mostly = {
{
.name = "CONNMARK",
- .family = AF_INET,
- .checkentry = connmark_tg_check,
+ .revision = 0,
+ .family = NFPROTO_UNSPEC,
+ .checkentry = connmark_tg_check_v0,
.destroy = connmark_tg_destroy,
- .target = connmark_tg,
+ .target = connmark_tg_v0,
.targetsize = sizeof(struct xt_connmark_target_info),
#ifdef CONFIG_COMPAT
.compatsize = sizeof(struct compat_xt_connmark_target_info),
- .compat_from_user = connmark_tg_compat_from_user,
- .compat_to_user = connmark_tg_compat_to_user,
+ .compat_from_user = connmark_tg_compat_from_user_v0,
+ .compat_to_user = connmark_tg_compat_to_user_v0,
#endif
.me = THIS_MODULE
},
{
- .name = "CONNMARK",
- .family = AF_INET6,
- .checkentry = connmark_tg_check,
- .destroy = connmark_tg_destroy,
- .target = connmark_tg,
- .targetsize = sizeof(struct xt_connmark_target_info),
-#ifdef CONFIG_COMPAT
- .compatsize = sizeof(struct compat_xt_connmark_target_info),
- .compat_from_user = connmark_tg_compat_from_user,
- .compat_to_user = connmark_tg_compat_to_user,
-#endif
- .me = THIS_MODULE
+ .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,
},
};