#include <linux/kernel.h>
#include <linux/ipv6.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
#include <net/dst.h>
#include <net/ipv6.h>
#include <net/ip6_route.h>
if (dst->error) {
IP6_INC_STATS(IPSTATS_MIB_OUTNOROUTES);
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "ip6_route_me_harder: No more route.\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "ip6_route_me_harder: No more route.\n");
dst_release(dst);
return -EINVAL;
}
}
EXPORT_SYMBOL(ip6_route_me_harder);
+/*
+ * Extra routing may needed on local out, as the QUEUE target never
+ * returns control to the table.
+ */
+
+struct ip6_rt_info {
+ struct in6_addr daddr;
+ struct in6_addr saddr;
+};
+
+static void save(const struct sk_buff *skb, struct nf_info *info)
+{
+ struct ip6_rt_info *rt_info = nf_info_reroute(info);
+
+ if (info->hook == NF_IP6_LOCAL_OUT) {
+ struct ipv6hdr *iph = skb->nh.ipv6h;
+
+ rt_info->daddr = iph->daddr;
+ rt_info->saddr = iph->saddr;
+ }
+}
+
+static int reroute(struct sk_buff **pskb, const struct nf_info *info)
+{
+ struct ip6_rt_info *rt_info = nf_info_reroute(info);
+
+ if (info->hook == NF_IP6_LOCAL_OUT) {
+ struct ipv6hdr *iph = (*pskb)->nh.ipv6h;
+ if (!ipv6_addr_equal(&iph->daddr, &rt_info->daddr) ||
+ !ipv6_addr_equal(&iph->saddr, &rt_info->saddr))
+ return ip6_route_me_harder(*pskb);
+ }
+ return 0;
+}
+
+static struct nf_queue_rerouter ip6_reroute = {
+ .rer_size = sizeof(struct ip6_rt_info),
+ .save = &save,
+ .reroute = &reroute,
+};
+
+int __init ipv6_netfilter_init(void)
+{
+ return nf_register_queue_rerouter(PF_INET6, &ip6_reroute);
+}
+
+void ipv6_netfilter_fini(void)
+{
+ nf_unregister_queue_rerouter(PF_INET6);
+}
+
+#else /* CONFIG_NETFILTER */
+int __init ipv6_netfilter_init(void)
+{
+ return 0;
+}
+
+void ipv6_netfilter_fini(void)
+{
+}
#endif /* CONFIG_NETFILTER */