#include <linux/ip.h>
#include <net/checksum.h>
-MODULE_AUTHOR("Henrik Nordstrom <hno@marasytems.com>");
+MODULE_AUTHOR("Henrik Nordstrom <hno@marasystems.com>");
MODULE_DESCRIPTION("IP tables CONNMARK matching module");
MODULE_LICENSE("GPL");
MODULE_ALIAS("ipt_CONNMARK");
+MODULE_ALIAS("ip6t_CONNMARK");
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_CONNMARK.h>
-#include <net/netfilter/nf_conntrack_compat.h>
+#include <net/netfilter/nf_conntrack_ecache.h>
static unsigned int
-target(struct sk_buff **pskb,
- const struct net_device *in,
- const struct net_device *out,
- unsigned int hooknum,
- const struct xt_target *target,
- const void *targinfo)
+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)
{
const struct xt_connmark_target_info *markinfo = targinfo;
+ struct nf_conn *ct;
+ enum ip_conntrack_info ctinfo;
u_int32_t diff;
- u_int32_t nfmark;
+ u_int32_t mark;
u_int32_t newmark;
- u_int32_t ctinfo;
- u_int32_t *ctmark = nf_ct_get_mark(*pskb, &ctinfo);
- if (ctmark) {
+ ct = nf_ct_get(skb, &ctinfo);
+ if (ct) {
switch(markinfo->mode) {
case XT_CONNMARK_SET:
- newmark = (*ctmark & ~markinfo->mask) | markinfo->mark;
- if (newmark != *ctmark) {
- *ctmark = newmark;
-#if defined(CONFIG_IP_NF_CONNTRACK) || defined(CONFIG_IP_NF_CONNTRACK_MODULE)
- ip_conntrack_event_cache(IPCT_MARK, *pskb);
-#else
- nf_conntrack_event_cache(IPCT_MARK, *pskb);
-#endif
- }
+ newmark = (ct->mark & ~markinfo->mask) | markinfo->mark;
+ if (newmark != ct->mark) {
+ ct->mark = newmark;
+ nf_conntrack_event_cache(IPCT_MARK, skb);
+ }
break;
case XT_CONNMARK_SAVE:
- newmark = (*ctmark & ~markinfo->mask) |
- ((*pskb)->nfmark & markinfo->mask);
- if (*ctmark != newmark) {
- *ctmark = newmark;
-#if defined(CONFIG_IP_NF_CONNTRACK) || defined(CONFIG_IP_NF_CONNTRACK_MODULE)
- ip_conntrack_event_cache(IPCT_MARK, *pskb);
-#else
- nf_conntrack_event_cache(IPCT_MARK, *pskb);
-#endif
+ newmark = (ct->mark & ~markinfo->mask) |
+ (skb->mark & markinfo->mask);
+ if (ct->mark != newmark) {
+ ct->mark = newmark;
+ nf_conntrack_event_cache(IPCT_MARK, skb);
}
break;
case XT_CONNMARK_RESTORE:
- nfmark = (*pskb)->nfmark;
- diff = (*ctmark ^ nfmark) & markinfo->mask;
- if (diff != 0)
- (*pskb)->nfmark = nfmark ^ diff;
+ mark = skb->mark;
+ diff = (ct->mark ^ mark) & markinfo->mask;
+ skb->mark = mark ^ diff;
break;
}
}
return XT_CONTINUE;
}
-static int
-checkentry(const char *tablename,
- const void *entry,
- const struct xt_target *target,
- void *targinfo,
- unsigned int hook_mask)
+static bool
+connmark_tg_check(const char *tablename, const void *entry,
+ const struct xt_target *target, void *targinfo,
+ unsigned int hook_mask)
{
- struct xt_connmark_target_info *matchinfo = targinfo;
+ const struct xt_connmark_target_info *matchinfo = targinfo;
if (matchinfo->mode == XT_CONNMARK_RESTORE) {
if (strcmp(tablename, "mangle") != 0) {
printk(KERN_WARNING "CONNMARK: restore can only be "
"called from \"mangle\" table, not \"%s\"\n",
tablename);
- return 0;
+ return false;
}
}
if (matchinfo->mark > 0xffffffff || matchinfo->mask > 0xffffffff) {
printk(KERN_WARNING "CONNMARK: Only supports 32bit mark\n");
- return 0;
+ return false;
}
- return 1;
+ if (nf_ct_l3proto_try_module_get(target->family) < 0) {
+ printk(KERN_WARNING "can't load conntrack support for "
+ "proto=%d\n", target->family);
+ return false;
+ }
+ return true;
+}
+
+static void
+connmark_tg_destroy(const struct xt_target *target, void *targinfo)
+{
+ nf_ct_l3proto_module_put(target->family);
}
#ifdef CONFIG_COMPAT
u_int16_t __pad2;
};
-static void compat_from_user(void *dst, void *src)
+static void connmark_tg_compat_from_user(void *dst, void *src)
{
- struct compat_xt_connmark_target_info *cm = src;
+ const struct compat_xt_connmark_target_info *cm = src;
struct xt_connmark_target_info m = {
.mark = cm->mark,
.mask = cm->mask,
memcpy(dst, &m, sizeof(m));
}
-static int compat_to_user(void __user *dst, void *src)
+static int connmark_tg_compat_to_user(void __user *dst, void *src)
{
- struct xt_connmark_target_info *m = src;
+ const struct xt_connmark_target_info *m = src;
struct compat_xt_connmark_target_info cm = {
.mark = m->mark,
.mask = m->mask,
}
#endif /* CONFIG_COMPAT */
-static struct xt_target xt_connmark_target[] = {
+static struct xt_target connmark_tg_reg[] __read_mostly = {
{
.name = "CONNMARK",
.family = AF_INET,
- .checkentry = checkentry,
- .target = target,
+ .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 = compat_from_user,
- .compat_to_user = compat_to_user,
+ .compat_from_user = connmark_tg_compat_from_user,
+ .compat_to_user = connmark_tg_compat_to_user,
#endif
.me = THIS_MODULE
},
{
.name = "CONNMARK",
.family = AF_INET6,
- .checkentry = checkentry,
- .target = target,
+ .checkentry = connmark_tg_check,
+ .destroy = connmark_tg_destroy,
+ .target = connmark_tg,
.targetsize = sizeof(struct xt_connmark_target_info),
.me = THIS_MODULE
},
};
-static int __init xt_connmark_init(void)
+static int __init connmark_tg_init(void)
{
- need_conntrack();
- return xt_register_targets(xt_connmark_target,
- ARRAY_SIZE(xt_connmark_target));
+ return xt_register_targets(connmark_tg_reg,
+ ARRAY_SIZE(connmark_tg_reg));
}
-static void __exit xt_connmark_fini(void)
+static void __exit connmark_tg_exit(void)
{
- xt_unregister_targets(xt_connmark_target,
- ARRAY_SIZE(xt_connmark_target));
+ xt_unregister_targets(connmark_tg_reg, ARRAY_SIZE(connmark_tg_reg));
}
-module_init(xt_connmark_init);
-module_exit(xt_connmark_fini);
+module_init(connmark_tg_init);
+module_exit(connmark_tg_exit);