9 files changed, 1750 insertions, 4 deletions

diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index 6e34804269391..a6026d2787d2c 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -176,6 +176,11 @@ resubmit:
 		if (ipprot->flags & INET6_PROTO_FINAL) {
 			struct ipv6hdr *hdr;	
 
+			/* Free reference early: we don't need it any more,
+			   and it may hold ip_conntrack module loaded
+			   indefinitely. */
+			nf_reset(skb);
+
 			skb_postpull_rcsum(skb, skb->nh.raw,
 					   skb->h.raw - skb->nh.raw);
 			hdr = skb->nh.ipv6h;
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index dbd9767b32e45..c1fa693511a17 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -441,9 +441,15 @@ static void ip6_copy_metadata(struct sk_buff *to, struct sk_buff *from)
 #ifdef CONFIG_NETFILTER
 	to->nfmark = from->nfmark;
 	/* Connection association is same as pre-frag packet */
+	nf_conntrack_put(to->nfct);
 	to->nfct = from->nfct;
 	nf_conntrack_get(to->nfct);
 	to->nfctinfo = from->nfctinfo;
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+	nf_conntrack_put_reasm(to->nfct_reasm);
+	to->nfct_reasm = from->nfct_reasm;
+	nf_conntrack_get_reasm(to->nfct_reasm);
+#endif
 #ifdef CONFIG_BRIDGE_NETFILTER
 	nf_bridge_put(to->nf_bridge);
 	to->nf_bridge = from->nf_bridge;
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig
index bb7ccfe33f238..971ba60bf6e9c 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -278,5 +278,19 @@ config IP6_NF_RAW
 	  If you want to compile it as a module, say M here and read
 	  <file:Documentation/modules.txt>.  If unsure, say `N'.
 
+config NF_CONNTRACK_IPV6
+	tristate "IPv6 support for new connection tracking (EXPERIMENTAL)"
+	depends on EXPERIMENTAL && NF_CONNTRACK
+	---help---
+	  Connection tracking keeps a record of what packets have passed
+	  through your machine, in order to figure out how they are related
+	  into connections.
+
+	  This is IPv6 support on Layer 3 independent connection tracking.
+	  Layer 3 independent connection tracking is experimental scheme
+	  which generalize ip_conntrack to support other layer 3 protocols.
+
+	  To compile it as a module, choose M here.  If unsure, say N.
+
 endmenu
 
diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile
index 2b2c370e8b1cc..9ab5b2ca1f590 100644
--- a/net/ipv6/netfilter/Makefile
+++ b/net/ipv6/netfilter/Makefile
@@ -27,3 +27,9 @@ obj-$(CONFIG_IP6_NF_TARGET_LOG) += ip6t_LOG.o
 obj-$(CONFIG_IP6_NF_RAW) += ip6table_raw.o
 obj-$(CONFIG_IP6_NF_MATCH_HL) += ip6t_hl.o
 obj-$(CONFIG_IP6_NF_TARGET_REJECT) += ip6t_REJECT.o
+
+# objects for l3 independent conntrack
+nf_conntrack_ipv6-objs  :=  nf_conntrack_l3proto_ipv6.o nf_conntrack_proto_icmpv6.o nf_conntrack_reasm.o
+
+# l3 independent conntrack
+obj-$(CONFIG_NF_CONNTRACK_IPV6) += nf_conntrack_ipv6.o
diff --git a/net/ipv6/netfilter/ip6t_MARK.c b/net/ipv6/netfilter/ip6t_MARK.c
index 0c7584f92172c..eab8fb864ee0a 100644
--- a/net/ipv6/netfilter/ip6t_MARK.c
+++ b/net/ipv6/netfilter/ip6t_MARK.c
@@ -56,9 +56,9 @@ checkentry(const char *tablename,
 	return 1;
 }
 
-static struct ip6t_target ip6t_mark_reg = {
-	.name 		= "MARK",
-	.target 	= target,
+static struct ip6t_target ip6t_mark_reg = { 
+	.name		= "MARK",
+	.target		= target,
 	.checkentry	= checkentry,
 	.me		= THIS_MODULE
 };
diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
new file mode 100644
index 0000000000000..e2c90b3a80745
--- /dev/null
+++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
@@ -0,0 +1,556 @@
+/*
+ * Copyright (C)2004 USAGI/WIDE Project
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Author:
+ *	Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ *
+ * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ *	- support Layer 3 protocol independent connection tracking.
+ *	  Based on the original ip_conntrack code which	had the following
+ *	  copyright information:
+ *		(C) 1999-2001 Paul `Rusty' Russell
+ *		(C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
+ *
+ * 23 Mar 2004: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ *	- add get_features() to support various size of conntrack
+ *	  structures.
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/ipv6.h>
+#include <linux/in6.h>
+#include <linux/netfilter.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/icmp.h>
+#include <linux/sysctl.h>
+#include <net/ipv6.h>
+
+#include <linux/netfilter_ipv6.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_helper.h>
+#include <net/netfilter/nf_conntrack_protocol.h>
+#include <net/netfilter/nf_conntrack_l3proto.h>
+#include <net/netfilter/nf_conntrack_core.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(format, args...)
+#endif
+
+DECLARE_PER_CPU(struct ip_conntrack_stat, nf_conntrack_stat);
+
+static int ipv6_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
+			     struct nf_conntrack_tuple *tuple)
+{
+	u_int32_t _addrs[8], *ap;
+
+	ap = skb_header_pointer(skb, nhoff + offsetof(struct ipv6hdr, saddr),
+				sizeof(_addrs), _addrs);
+	if (ap == NULL)
+		return 0;
+
+	memcpy(tuple->src.u3.ip6, ap, sizeof(tuple->src.u3.ip6));
+	memcpy(tuple->dst.u3.ip6, ap + 4, sizeof(tuple->dst.u3.ip6));
+
+	return 1;
+}
+
+static int ipv6_invert_tuple(struct nf_conntrack_tuple *tuple,
+			     const struct nf_conntrack_tuple *orig)
+{
+	memcpy(tuple->src.u3.ip6, orig->dst.u3.ip6, sizeof(tuple->src.u3.ip6));
+	memcpy(tuple->dst.u3.ip6, orig->src.u3.ip6, sizeof(tuple->dst.u3.ip6));
+
+	return 1;
+}
+
+static int ipv6_print_tuple(struct seq_file *s,
+			    const struct nf_conntrack_tuple *tuple)
+{
+	return seq_printf(s, "src=%x:%x:%x:%x:%x:%x:%x:%x dst=%x:%x:%x:%x:%x:%x:%x:%x ",
+			  NIP6(*((struct in6_addr *)tuple->src.u3.ip6)),
+			  NIP6(*((struct in6_addr *)tuple->dst.u3.ip6)));
+}
+
+static int ipv6_print_conntrack(struct seq_file *s,
+				const struct nf_conn *conntrack)
+{
+	return 0;
+}
+
+/*
+ * Based on ipv6_skip_exthdr() in net/ipv6/exthdr.c
+ *
+ * This function parses (probably truncated) exthdr set "hdr"
+ * of length "len". "nexthdrp" initially points to some place,
+ * where type of the first header can be found.
+ *
+ * It skips all well-known exthdrs, and returns pointer to the start
+ * of unparsable area i.e. the first header with unknown type.
+ * if success, *nexthdr is updated by type/protocol of this header.
+ *
+ * NOTES: - it may return pointer pointing beyond end of packet,
+ *          if the last recognized header is truncated in the middle.
+ *        - if packet is truncated, so that all parsed headers are skipped,
+ *          it returns -1.
+ *        - if packet is fragmented, return pointer of the fragment header.
+ *        - ESP is unparsable for now and considered like
+ *          normal payload protocol.
+ *        - Note also special handling of AUTH header. Thanks to IPsec wizards.
+ */
+
+int nf_ct_ipv6_skip_exthdr(struct sk_buff *skb, int start, u8 *nexthdrp,
+			   int len)
+{
+	u8 nexthdr = *nexthdrp;
+
+	while (ipv6_ext_hdr(nexthdr)) {
+		struct ipv6_opt_hdr hdr;
+		int hdrlen;
+
+		if (len < (int)sizeof(struct ipv6_opt_hdr))
+			return -1;
+		if (nexthdr == NEXTHDR_NONE)
+			break;
+		if (nexthdr == NEXTHDR_FRAGMENT)
+			break;
+		if (skb_copy_bits(skb, start, &hdr, sizeof(hdr)))
+			BUG();
+		if (nexthdr == NEXTHDR_AUTH)
+			hdrlen = (hdr.hdrlen+2)<<2;
+		else
+			hdrlen = ipv6_optlen(&hdr);
+
+		nexthdr = hdr.nexthdr;
+		len -= hdrlen;
+		start += hdrlen;
+	}
+
+	*nexthdrp = nexthdr;
+	return start;
+}
+
+static int
+ipv6_prepare(struct sk_buff **pskb, unsigned int hooknum, unsigned int *dataoff,
+	     u_int8_t *protonum)
+{
+	unsigned int extoff;
+	unsigned char pnum;
+	int protoff;
+
+	extoff = (u8*)((*pskb)->nh.ipv6h + 1) - (*pskb)->data;
+	pnum = (*pskb)->nh.ipv6h->nexthdr;
+
+	protoff = nf_ct_ipv6_skip_exthdr(*pskb, extoff, &pnum,
+					 (*pskb)->len - extoff);
+
+	/*
+	 * (protoff == (*pskb)->len) mean that the packet doesn't have no data
+	 * except of IPv6 & ext headers. but it's tracked anyway. - YK
+	 */
+	if ((protoff < 0) || (protoff > (*pskb)->len)) {
+		DEBUGP("ip6_conntrack_core: can't find proto in pkt\n");
+		NF_CT_STAT_INC(error);
+		NF_CT_STAT_INC(invalid);
+		return -NF_ACCEPT;
+	}
+
+	*dataoff = protoff;
+	*protonum = pnum;
+	return NF_ACCEPT;
+}
+
+static u_int32_t ipv6_get_features(const struct nf_conntrack_tuple *tuple)
+{
+	return NF_CT_F_BASIC;
+}
+
+static unsigned int ipv6_confirm(unsigned int hooknum,
+				 struct sk_buff **pskb,
+				 const struct net_device *in,
+				 const struct net_device *out,
+				 int (*okfn)(struct sk_buff *))
+{
+	struct nf_conn *ct;
+	enum ip_conntrack_info ctinfo;
+
+	/* This is where we call the helper: as the packet goes out. */
+	ct = nf_ct_get(*pskb, &ctinfo);
+	if (ct && ct->helper) {
+		unsigned int ret, protoff;
+		unsigned int extoff = (u8*)((*pskb)->nh.ipv6h + 1)
+				      - (*pskb)->data;
+		unsigned char pnum = (*pskb)->nh.ipv6h->nexthdr;
+
+		protoff = nf_ct_ipv6_skip_exthdr(*pskb, extoff, &pnum,
+						 (*pskb)->len - extoff);
+		if (protoff < 0 || protoff > (*pskb)->len ||
+		    pnum == NEXTHDR_FRAGMENT) {
+			DEBUGP("proto header not found\n");
+			return NF_ACCEPT;
+		}
+
+		ret = ct->helper->help(pskb, protoff, ct, ctinfo);
+		if (ret != NF_ACCEPT)
+			return ret;
+	}
+
+	/* We've seen it coming out the other side: confirm it */
+
+	return nf_conntrack_confirm(pskb);
+}
+
+extern struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb);
+extern void nf_ct_frag6_output(unsigned int hooknum, struct sk_buff *skb,
+			       struct net_device *in,
+			       struct net_device *out,
+			       int (*okfn)(struct sk_buff *));
+static unsigned int ipv6_defrag(unsigned int hooknum,
+				struct sk_buff **pskb,
+				const struct net_device *in,
+				const struct net_device *out,
+				int (*okfn)(struct sk_buff *))
+{
+	struct sk_buff *reasm;
+
+	/* Previously seen (loopback)?  */
+	if ((*pskb)->nfct)
+		return NF_ACCEPT;
+
+	reasm = nf_ct_frag6_gather(*pskb);
+
+	/* queued */
+	if (reasm == NULL)
+		return NF_STOLEN;
+
+	/* error occured or not fragmented */
+	if (reasm == *pskb)
+		return NF_ACCEPT;
+
+	nf_ct_frag6_output(hooknum, reasm, (struct net_device *)in,
+			   (struct net_device *)out, okfn);
+
+	return NF_STOLEN;
+}
+
+static unsigned int ipv6_conntrack_in(unsigned int hooknum,
+				      struct sk_buff **pskb,
+				      const struct net_device *in,
+				      const struct net_device *out,
+				      int (*okfn)(struct sk_buff *))
+{
+	struct sk_buff *reasm = (*pskb)->nfct_reasm;
+
+	/* This packet is fragmented and has reassembled packet. */
+	if (reasm) {
+		/* Reassembled packet isn't parsed yet ? */
+		if (!reasm->nfct) {
+			unsigned int ret;
+
+			ret = nf_conntrack_in(PF_INET6, hooknum, &reasm);
+			if (ret != NF_ACCEPT)
+				return ret;
+		}
+		nf_conntrack_get(reasm->nfct);
+		(*pskb)->nfct = reasm->nfct;
+		return NF_ACCEPT;
+	}
+
+	return nf_conntrack_in(PF_INET6, hooknum, pskb);
+}
+
+static unsigned int ipv6_conntrack_local(unsigned int hooknum,
+					 struct sk_buff **pskb,
+					 const struct net_device *in,
+					 const struct net_device *out,
+					 int (*okfn)(struct sk_buff *))
+{
+	/* root is playing with raw sockets. */
+	if ((*pskb)->len < sizeof(struct ipv6hdr)) {
+		if (net_ratelimit())
+			printk("ipv6_conntrack_local: packet too short\n");
+		return NF_ACCEPT;
+	}
+	return ipv6_conntrack_in(hooknum, pskb, in, out, okfn);
+}
+
+/* Connection tracking may drop packets, but never alters them, so
+   make it the first hook. */
+static struct nf_hook_ops ipv6_conntrack_defrag_ops = {
+	.hook		= ipv6_defrag,
+	.owner		= THIS_MODULE,
+	.pf		= PF_INET6,
+	.hooknum	= NF_IP6_PRE_ROUTING,
+	.priority	= NF_IP6_PRI_CONNTRACK_DEFRAG,
+};
+
+static struct nf_hook_ops ipv6_conntrack_in_ops = {
+	.hook		= ipv6_conntrack_in,
+	.owner		= THIS_MODULE,
+	.pf		= PF_INET6,
+	.hooknum	= NF_IP6_PRE_ROUTING,
+	.priority	= NF_IP6_PRI_CONNTRACK,
+};
+
+static struct nf_hook_ops ipv6_conntrack_local_out_ops = {
+	.hook		= ipv6_conntrack_local,
+	.owner		= THIS_MODULE,
+	.pf		= PF_INET6,
+	.hooknum	= NF_IP6_LOCAL_OUT,
+	.priority	= NF_IP6_PRI_CONNTRACK,
+};
+
+static struct nf_hook_ops ipv6_conntrack_defrag_local_out_ops = {
+	.hook		= ipv6_defrag,
+	.owner		= THIS_MODULE,
+	.pf		= PF_INET6,
+	.hooknum	= NF_IP6_LOCAL_OUT,
+	.priority	= NF_IP6_PRI_CONNTRACK_DEFRAG,
+};
+
+/* Refragmenter; last chance. */
+static struct nf_hook_ops ipv6_conntrack_out_ops = {
+	.hook		= ipv6_confirm,
+	.owner		= THIS_MODULE,
+	.pf		= PF_INET6,
+	.hooknum	= NF_IP6_POST_ROUTING,
+	.priority	= NF_IP6_PRI_LAST,
+};
+
+static struct nf_hook_ops ipv6_conntrack_local_in_ops = {
+	.hook		= ipv6_confirm,
+	.owner		= THIS_MODULE,
+	.pf		= PF_INET6,
+	.hooknum	= NF_IP6_LOCAL_IN,
+	.priority	= NF_IP6_PRI_LAST-1,
+};
+
+#ifdef CONFIG_SYSCTL
+
+/* From nf_conntrack_proto_icmpv6.c */
+extern unsigned long nf_ct_icmpv6_timeout;
+
+/* From nf_conntrack_frag6.c */
+extern unsigned long nf_ct_frag6_timeout;
+extern unsigned long nf_ct_frag6_low_thresh;
+extern unsigned long nf_ct_frag6_high_thresh;
+
+static struct ctl_table_header *nf_ct_ipv6_sysctl_header;
+
+static ctl_table nf_ct_sysctl_table[] = {
+	{
+		.ctl_name	= NET_NF_CONNTRACK_ICMPV6_TIMEOUT,
+		.procname	= "nf_conntrack_icmpv6_timeout",
+		.data		= &nf_ct_icmpv6_timeout,
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= &proc_dointvec_jiffies,
+	},
+	{
+		.ctl_name	= NET_NF_CONNTRACK_FRAG6_TIMEOUT,
+		.procname	= "nf_conntrack_frag6_timeout",
+		.data		= &nf_ct_frag6_timeout,
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= &proc_dointvec_jiffies,
+	},
+	{
+		.ctl_name	= NET_NF_CONNTRACK_FRAG6_LOW_THRESH,
+		.procname	= "nf_conntrack_frag6_low_thresh",
+		.data		= &nf_ct_frag6_low_thresh,
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= &proc_dointvec_jiffies,
+	},
+	{
+		.ctl_name	= NET_NF_CONNTRACK_FRAG6_HIGH_THRESH,
+		.procname	= "nf_conntrack_frag6_high_thresh",
+		.data		= &nf_ct_frag6_high_thresh,
+		.maxlen		= sizeof(unsigned int),
+		.mode		= 0644,
+		.proc_handler	= &proc_dointvec_jiffies,
+	},
+        { .ctl_name = 0 }
+};
+
+static ctl_table nf_ct_netfilter_table[] = {
+	{
+		.ctl_name	= NET_NETFILTER,
+		.procname	= "netfilter",
+		.mode		= 0555,
+		.child		= nf_ct_sysctl_table,
+	},
+	{ .ctl_name = 0 }
+};
+
+static ctl_table nf_ct_net_table[] = {
+	{
+		.ctl_name	= CTL_NET,
+		.procname	= "net",
+		.mode		= 0555,
+		.child		= nf_ct_netfilter_table,
+	},
+	{ .ctl_name = 0 }
+};
+#endif
+
+struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6 = {
+	.l3proto		= PF_INET6,
+	.name			= "ipv6",
+	.pkt_to_tuple		= ipv6_pkt_to_tuple,
+	.invert_tuple		= ipv6_invert_tuple,
+	.print_tuple		= ipv6_print_tuple,
+	.print_conntrack	= ipv6_print_conntrack,
+	.prepare		= ipv6_prepare,
+	.get_features		= ipv6_get_features,
+	.me			= THIS_MODULE,
+};
+
+extern struct nf_conntrack_protocol nf_conntrack_protocol_tcp6;
+extern struct nf_conntrack_protocol nf_conntrack_protocol_udp6;
+extern struct nf_conntrack_protocol nf_conntrack_protocol_icmpv6;
+extern int nf_ct_frag6_init(void);
+extern void nf_ct_frag6_cleanup(void);
+static int init_or_cleanup(int init)
+{
+	int ret = 0;
+
+	if (!init) goto cleanup;
+
+	ret = nf_ct_frag6_init();
+	if (ret < 0) {
+		printk("nf_conntrack_ipv6: can't initialize frag6.\n");
+		goto cleanup_nothing;
+	}
+	ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_tcp6);
+	if (ret < 0) {
+		printk("nf_conntrack_ipv6: can't register tcp.\n");
+		goto cleanup_frag6;
+	}
+
+	ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_udp6);
+	if (ret < 0) {
+		printk("nf_conntrack_ipv6: can't register udp.\n");
+		goto cleanup_tcp;
+	}
+
+	ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_icmpv6);
+	if (ret < 0) {
+		printk("nf_conntrack_ipv6: can't register icmpv6.\n");
+		goto cleanup_udp;
+	}
+
+	ret = nf_conntrack_l3proto_register(&nf_conntrack_l3proto_ipv6);
+	if (ret < 0) {
+		printk("nf_conntrack_ipv6: can't register ipv6\n");
+		goto cleanup_icmpv6;
+	}
+
+	ret = nf_register_hook(&ipv6_conntrack_defrag_ops);
+	if (ret < 0) {
+		printk("nf_conntrack_ipv6: can't register pre-routing defrag "
+		       "hook.\n");
+		goto cleanup_ipv6;
+	}
+
+	ret = nf_register_hook(&ipv6_conntrack_defrag_local_out_ops);
+	if (ret < 0) {
+		printk("nf_conntrack_ipv6: can't register local_out defrag "
+		       "hook.\n");
+		goto cleanup_defragops;
+	}
+
+	ret = nf_register_hook(&ipv6_conntrack_in_ops);
+	if (ret < 0) {
+		printk("nf_conntrack_ipv6: can't register pre-routing hook.\n");
+		goto cleanup_defraglocalops;
+	}
+
+	ret = nf_register_hook(&ipv6_conntrack_local_out_ops);
+	if (ret < 0) {
+		printk("nf_conntrack_ipv6: can't register local out hook.\n");
+		goto cleanup_inops;
+	}
+
+	ret = nf_register_hook(&ipv6_conntrack_out_ops);
+	if (ret < 0) {
+		printk("nf_conntrack_ipv6: can't register post-routing hook.\n");
+		goto cleanup_inandlocalops;
+	}
+
+	ret = nf_register_hook(&ipv6_conntrack_local_in_ops);
+	if (ret < 0) {
+		printk("nf_conntrack_ipv6: can't register local in hook.\n");
+		goto cleanup_inoutandlocalops;
+	}
+
+#ifdef CONFIG_SYSCTL
+	nf_ct_ipv6_sysctl_header = register_sysctl_table(nf_ct_net_table, 0);
+	if (nf_ct_ipv6_sysctl_header == NULL) {
+		printk("nf_conntrack: can't register to sysctl.\n");
+		ret = -ENOMEM;
+		goto cleanup_localinops;
+	}
+#endif
+	return ret;
+
+ cleanup:
+	synchronize_net();
+#ifdef CONFIG_SYSCTL
+ 	unregister_sysctl_table(nf_ct_ipv6_sysctl_header);
+ cleanup_localinops:
+#endif
+	nf_unregister_hook(&ipv6_conntrack_local_in_ops);
+ cleanup_inoutandlocalops:
+	nf_unregister_hook(&ipv6_conntrack_out_ops);
+ cleanup_inandlocalops:
+	nf_unregister_hook(&ipv6_conntrack_local_out_ops);
+ cleanup_inops:
+	nf_unregister_hook(&ipv6_conntrack_in_ops);
+ cleanup_defraglocalops:
+	nf_unregister_hook(&ipv6_conntrack_defrag_local_out_ops);
+ cleanup_defragops:
+	nf_unregister_hook(&ipv6_conntrack_defrag_ops);
+ cleanup_ipv6:
+	nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv6);
+ cleanup_icmpv6:
+	nf_conntrack_protocol_unregister(&nf_conntrack_protocol_icmpv6);
+ cleanup_udp:
+	nf_conntrack_protocol_unregister(&nf_conntrack_protocol_udp6);
+ cleanup_tcp:
+	nf_conntrack_protocol_unregister(&nf_conntrack_protocol_tcp6);
+ cleanup_frag6:
+	nf_ct_frag6_cleanup();
+ cleanup_nothing:
+	return ret;
+}
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Yasuyuki KOZAKAI @USAGI <yasuyuki.kozakai@toshiba.co.jp>");
+
+static int __init init(void)
+{
+	need_nf_conntrack();
+	return init_or_cleanup(1);
+}
+
+static void __exit fini(void)
+{
+	init_or_cleanup(0);
+}
+
+module_init(init);
+module_exit(fini);
+
+void need_ip6_conntrack(void)
+{
+}
+
+EXPORT_SYMBOL(need_ip6_conntrack);
diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
new file mode 100644
index 0000000000000..c0f1da5497a9c
--- /dev/null
+++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
@@ -0,0 +1,272 @@
+/*
+ * Copyright (C)2003,2004 USAGI/WIDE Project
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Author:
+ *	Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ *
+ * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ *	- ICMPv6 tracking support. Derived from the original ip_conntrack code
+ *	  net/ipv4/netfilter/ip_conntrack_proto_icmp.c which had the following
+ *	  copyright information:
+ *		(C) 1999-2001 Paul `Rusty' Russell
+ *		(C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
+ */
+
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/module.h>
+#include <linux/netfilter.h>
+#include <linux/in6.h>
+#include <linux/icmpv6.h>
+#include <linux/ipv6.h>
+#include <net/ipv6.h>
+#include <net/ip6_checksum.h>
+#include <linux/seq_file.h>
+#include <linux/netfilter_ipv6.h>
+#include <net/netfilter/nf_conntrack_tuple.h>
+#include <net/netfilter/nf_conntrack_protocol.h>
+#include <net/netfilter/nf_conntrack_core.h>
+#include <net/netfilter/ipv6/nf_conntrack_icmpv6.h>
+
+unsigned long nf_ct_icmpv6_timeout = 30*HZ;
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(format, args...)
+#endif
+
+static int icmpv6_pkt_to_tuple(const struct sk_buff *skb,
+			       unsigned int dataoff,
+			       struct nf_conntrack_tuple *tuple)
+{
+	struct icmp6hdr _hdr, *hp;
+
+	hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
+	if (hp == NULL)
+		return 0;
+	tuple->dst.u.icmp.type = hp->icmp6_type;
+	tuple->src.u.icmp.id = hp->icmp6_identifier;
+	tuple->dst.u.icmp.code = hp->icmp6_code;
+
+	return 1;
+}
+
+static int icmpv6_invert_tuple(struct nf_conntrack_tuple *tuple,
+			       const struct nf_conntrack_tuple *orig)
+{
+	/* Add 1; spaces filled with 0. */
+	static u_int8_t invmap[] = {
+		[ICMPV6_ECHO_REQUEST - 128]	= ICMPV6_ECHO_REPLY + 1,
+		[ICMPV6_ECHO_REPLY - 128]	= ICMPV6_ECHO_REQUEST + 1,
+		[ICMPV6_NI_QUERY - 128]		= ICMPV6_NI_QUERY + 1,
+		[ICMPV6_NI_REPLY - 128]		= ICMPV6_NI_REPLY +1
+	};
+
+	__u8 type = orig->dst.u.icmp.type - 128;
+	if (type >= sizeof(invmap) || !invmap[type])
+		return 0;
+
+	tuple->src.u.icmp.id   = orig->src.u.icmp.id;
+	tuple->dst.u.icmp.type = invmap[type] - 1;
+	tuple->dst.u.icmp.code = orig->dst.u.icmp.code;
+	return 1;
+}
+
+/* Print out the per-protocol part of the tuple. */
+static int icmpv6_print_tuple(struct seq_file *s,
+			      const struct nf_conntrack_tuple *tuple)
+{
+	return seq_printf(s, "type=%u code=%u id=%u ",
+			  tuple->dst.u.icmp.type,
+			  tuple->dst.u.icmp.code,
+			  ntohs(tuple->src.u.icmp.id));
+}
+
+/* Print out the private part of the conntrack. */
+static int icmpv6_print_conntrack(struct seq_file *s,
+				  const struct nf_conn *conntrack)
+{
+	return 0;
+}
+
+/* Returns verdict for packet, or -1 for invalid. */
+static int icmpv6_packet(struct nf_conn *ct,
+		       const struct sk_buff *skb,
+		       unsigned int dataoff,
+		       enum ip_conntrack_info ctinfo,
+		       int pf,
+		       unsigned int hooknum)
+{
+	/* Try to delete connection immediately after all replies:
+           won't actually vanish as we still have skb, and del_timer
+           means this will only run once even if count hits zero twice
+           (theoretically possible with SMP) */
+	if (CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY) {
+		if (atomic_dec_and_test(&ct->proto.icmp.count)
+		    && del_timer(&ct->timeout))
+			ct->timeout.function((unsigned long)ct);
+	} else {
+		atomic_inc(&ct->proto.icmp.count);
+		nf_conntrack_event_cache(IPCT_PROTOINFO_VOLATILE, skb);
+		nf_ct_refresh_acct(ct, ctinfo, skb, nf_ct_icmpv6_timeout);
+	}
+
+	return NF_ACCEPT;
+}
+
+/* Called when a new connection for this protocol found. */
+static int icmpv6_new(struct nf_conn *conntrack,
+		      const struct sk_buff *skb,
+		      unsigned int dataoff)
+{
+	static u_int8_t valid_new[] = {
+		[ICMPV6_ECHO_REQUEST - 128] = 1,
+		[ICMPV6_NI_QUERY - 128] = 1
+	};
+
+	if (conntrack->tuplehash[0].tuple.dst.u.icmp.type - 128 >= sizeof(valid_new)
+	    || !valid_new[conntrack->tuplehash[0].tuple.dst.u.icmp.type - 128]) {
+		/* Can't create a new ICMPv6 `conn' with this. */
+		DEBUGP("icmp: can't create new conn with type %u\n",
+		       conntrack->tuplehash[0].tuple.dst.u.icmp.type);
+		NF_CT_DUMP_TUPLE(&conntrack->tuplehash[0].tuple);
+		return 0;
+	}
+	atomic_set(&conntrack->proto.icmp.count, 0);
+	return 1;
+}
+
+extern int
+nf_ct_ipv6_skip_exthdr(struct sk_buff *skb, int start, u8 *nexthdrp, int len);
+extern struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6;
+static int
+icmpv6_error_message(struct sk_buff *skb,
+		     unsigned int icmp6off,
+		     enum ip_conntrack_info *ctinfo,
+		     unsigned int hooknum)
+{
+	struct nf_conntrack_tuple intuple, origtuple;
+	struct nf_conntrack_tuple_hash *h;
+	struct icmp6hdr _hdr, *hp;
+	unsigned int inip6off;
+	struct nf_conntrack_protocol *inproto;
+	u_int8_t inprotonum;
+	unsigned int inprotoff;
+
+	NF_CT_ASSERT(skb->nfct == NULL);
+
+	hp = skb_header_pointer(skb, icmp6off, sizeof(_hdr), &_hdr);
+	if (hp == NULL) {
+		DEBUGP("icmpv6_error: Can't get ICMPv6 hdr.\n");
+		return -NF_ACCEPT;
+	}
+
+	inip6off = icmp6off + sizeof(_hdr);
+	if (skb_copy_bits(skb, inip6off+offsetof(struct ipv6hdr, nexthdr),
+			  &inprotonum, sizeof(inprotonum)) != 0) {
+		DEBUGP("icmpv6_error: Can't get nexthdr in inner IPv6 header.\n");
+		return -NF_ACCEPT;
+	}
+	inprotoff = nf_ct_ipv6_skip_exthdr(skb,
+					   inip6off + sizeof(struct ipv6hdr),
+					   &inprotonum,
+					   skb->len - inip6off
+						    - sizeof(struct ipv6hdr));
+
+	if ((inprotoff < 0) || (inprotoff > skb->len) ||
+	    (inprotonum == NEXTHDR_FRAGMENT)) {
+		DEBUGP("icmpv6_error: Can't get protocol header in ICMPv6 payload.\n");
+		return -NF_ACCEPT;
+	}
+
+	inproto = nf_ct_find_proto(PF_INET6, inprotonum);
+
+	/* Are they talking about one of our connections? */
+	if (!nf_ct_get_tuple(skb, inip6off, inprotoff, PF_INET6, inprotonum,
+			     &origtuple, &nf_conntrack_l3proto_ipv6, inproto)) {
+		DEBUGP("icmpv6_error: Can't get tuple\n");
+		return -NF_ACCEPT;
+	}
+
+	/* Ordinarily, we'd expect the inverted tupleproto, but it's
+	   been preserved inside the ICMP. */
+	if (!nf_ct_invert_tuple(&intuple, &origtuple,
+				&nf_conntrack_l3proto_ipv6, inproto)) {
+		DEBUGP("icmpv6_error: Can't invert tuple\n");
+		return -NF_ACCEPT;
+	}
+
+	*ctinfo = IP_CT_RELATED;
+
+	h = nf_conntrack_find_get(&intuple, NULL);
+	if (!h) {
+		DEBUGP("icmpv6_error: no match\n");
+		return -NF_ACCEPT;
+	} else {
+		if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY)
+			*ctinfo += IP_CT_IS_REPLY;
+	}
+
+	/* Update skb to refer to this connection */
+	skb->nfct = &nf_ct_tuplehash_to_ctrack(h)->ct_general;
+	skb->nfctinfo = *ctinfo;
+	return -NF_ACCEPT;
+}
+
+static int
+icmpv6_error(struct sk_buff *skb, unsigned int dataoff,
+	     enum ip_conntrack_info *ctinfo, int pf, unsigned int hooknum)
+{
+	struct icmp6hdr _ih, *icmp6h;
+
+	icmp6h = skb_header_pointer(skb, dataoff, sizeof(_ih), &_ih);
+	if (icmp6h == NULL) {
+		if (LOG_INVALID(IPPROTO_ICMPV6))
+		nf_log_packet(PF_INET6, 0, skb, NULL, NULL, NULL,
+			      "nf_ct_icmpv6: short packet ");
+		return -NF_ACCEPT;
+	}
+
+	if (hooknum != NF_IP6_PRE_ROUTING)
+		goto skipped;
+
+	/* Ignore it if the checksum's bogus. */
+	if (csum_ipv6_magic(&skb->nh.ipv6h->saddr, &skb->nh.ipv6h->daddr,
+			    skb->len - dataoff, IPPROTO_ICMPV6,
+			    skb_checksum(skb, dataoff,
+					 skb->len - dataoff, 0))) {
+		nf_log_packet(PF_INET6, 0, skb, NULL, NULL, NULL,
+			      "nf_ct_icmpv6: ICMPv6 checksum failed\n");
+		return -NF_ACCEPT;
+	}
+
+skipped:
+
+	/* is not error message ? */
+	if (icmp6h->icmp6_type >= 128)
+		return NF_ACCEPT;
+
+	return icmpv6_error_message(skb, dataoff, ctinfo, hooknum);
+}
+
+struct nf_conntrack_protocol nf_conntrack_protocol_icmpv6 =
+{
+	.l3proto		= PF_INET6,
+	.proto			= IPPROTO_ICMPV6,
+	.name			= "icmpv6",
+	.pkt_to_tuple		= icmpv6_pkt_to_tuple,
+	.invert_tuple		= icmpv6_invert_tuple,
+	.print_tuple		= icmpv6_print_tuple,
+	.print_conntrack	= icmpv6_print_conntrack,
+	.packet			= icmpv6_packet,
+	.new			= icmpv6_new,
+	.error			= icmpv6_error,
+};
+
+EXPORT_SYMBOL(nf_conntrack_protocol_icmpv6);
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
new file mode 100644
index 0000000000000..7640b9bb76949
--- /dev/null
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -0,0 +1,885 @@
+/*
+ * IPv6 fragment reassembly for connection tracking
+ *
+ * Copyright (C)2004 USAGI/WIDE Project
+ *
+ * Author:
+ *	Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ *
+ * Based on: net/ipv6/reassembly.c
+ *
+ * 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 the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/jiffies.h>
+#include <linux/net.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/in6.h>
+#include <linux/ipv6.h>
+#include <linux/icmpv6.h>
+#include <linux/random.h>
+#include <linux/jhash.h>
+
+#include <net/sock.h>
+#include <net/snmp.h>
+
+#include <net/ipv6.h>
+#include <net/protocol.h>
+#include <net/transp_v6.h>
+#include <net/rawv6.h>
+#include <net/ndisc.h>
+#include <net/addrconf.h>
+#include <linux/sysctl.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(format, args...)
+#endif
+
+#define NF_CT_FRAG6_HIGH_THRESH 262144 /* == 256*1024 */
+#define NF_CT_FRAG6_LOW_THRESH 196608  /* == 192*1024 */
+#define NF_CT_FRAG6_TIMEOUT IPV6_FRAG_TIMEOUT
+
+int nf_ct_frag6_high_thresh = 256*1024;
+int nf_ct_frag6_low_thresh = 192*1024;
+int nf_ct_frag6_timeout = IPV6_FRAG_TIMEOUT;
+
+struct nf_ct_frag6_skb_cb
+{
+	struct inet6_skb_parm	h;
+	int			offset;
+	struct sk_buff		*orig;
+};
+
+#define NFCT_FRAG6_CB(skb)	((struct nf_ct_frag6_skb_cb*)((skb)->cb))
+
+struct nf_ct_frag6_queue
+{
+	struct nf_ct_frag6_queue	*next;
+	struct list_head lru_list;		/* lru list member	*/
+
+	__u32			id;		/* fragment id		*/
+	struct in6_addr		saddr;
+	struct in6_addr		daddr;
+
+	spinlock_t		lock;
+	atomic_t		refcnt;
+	struct timer_list	timer;		/* expire timer		*/
+	struct sk_buff		*fragments;
+	int			len;
+	int			meat;
+	struct timeval		stamp;
+	unsigned int		csum;
+	__u8			last_in;	/* has first/last segment arrived? */
+#define COMPLETE		4
+#define FIRST_IN		2
+#define LAST_IN			1
+	__u16			nhoffset;
+	struct nf_ct_frag6_queue	**pprev;
+};
+
+/* Hash table. */
+
+#define FRAG6Q_HASHSZ	64
+
+static struct nf_ct_frag6_queue *nf_ct_frag6_hash[FRAG6Q_HASHSZ];
+static rwlock_t nf_ct_frag6_lock = RW_LOCK_UNLOCKED;
+static u32 nf_ct_frag6_hash_rnd;
+static LIST_HEAD(nf_ct_frag6_lru_list);
+int nf_ct_frag6_nqueues = 0;
+
+static __inline__ void __fq_unlink(struct nf_ct_frag6_queue *fq)
+{
+	if (fq->next)
+		fq->next->pprev = fq->pprev;
+	*fq->pprev = fq->next;
+	list_del(&fq->lru_list);
+	nf_ct_frag6_nqueues--;
+}
+
+static __inline__ void fq_unlink(struct nf_ct_frag6_queue *fq)
+{
+	write_lock(&nf_ct_frag6_lock);
+	__fq_unlink(fq);
+	write_unlock(&nf_ct_frag6_lock);
+}
+
+static unsigned int ip6qhashfn(u32 id, struct in6_addr *saddr,
+			       struct in6_addr *daddr)
+{
+	u32 a, b, c;
+
+	a = saddr->s6_addr32[0];
+	b = saddr->s6_addr32[1];
+	c = saddr->s6_addr32[2];
+
+	a += JHASH_GOLDEN_RATIO;
+	b += JHASH_GOLDEN_RATIO;
+	c += nf_ct_frag6_hash_rnd;
+	__jhash_mix(a, b, c);
+
+	a += saddr->s6_addr32[3];
+	b += daddr->s6_addr32[0];
+	c += daddr->s6_addr32[1];
+	__jhash_mix(a, b, c);
+
+	a += daddr->s6_addr32[2];
+	b += daddr->s6_addr32[3];
+	c += id;
+	__jhash_mix(a, b, c);
+
+	return c & (FRAG6Q_HASHSZ - 1);
+}
+
+static struct timer_list nf_ct_frag6_secret_timer;
+int nf_ct_frag6_secret_interval = 10 * 60 * HZ;
+
+static void nf_ct_frag6_secret_rebuild(unsigned long dummy)
+{
+	unsigned long now = jiffies;
+	int i;
+
+	write_lock(&nf_ct_frag6_lock);
+	get_random_bytes(&nf_ct_frag6_hash_rnd, sizeof(u32));
+	for (i = 0; i < FRAG6Q_HASHSZ; i++) {
+		struct nf_ct_frag6_queue *q;
+
+		q = nf_ct_frag6_hash[i];
+		while (q) {
+			struct nf_ct_frag6_queue *next = q->next;
+			unsigned int hval = ip6qhashfn(q->id,
+						       &q->saddr,
+						       &q->daddr);
+
+			if (hval != i) {
+				/* Unlink. */
+				if (q->next)
+					q->next->pprev = q->pprev;
+				*q->pprev = q->next;
+
+				/* Relink to new hash chain. */
+				if ((q->next = nf_ct_frag6_hash[hval]) != NULL)
+					q->next->pprev = &q->next;
+				nf_ct_frag6_hash[hval] = q;
+				q->pprev = &nf_ct_frag6_hash[hval];
+			}
+
+			q = next;
+		}
+	}
+	write_unlock(&nf_ct_frag6_lock);
+
+	mod_timer(&nf_ct_frag6_secret_timer, now + nf_ct_frag6_secret_interval);
+}
+
+atomic_t nf_ct_frag6_mem = ATOMIC_INIT(0);
+
+/* Memory Tracking Functions. */
+static inline void frag_kfree_skb(struct sk_buff *skb)
+{
+	atomic_sub(skb->truesize, &nf_ct_frag6_mem);
+	if (NFCT_FRAG6_CB(skb)->orig)
+		kfree_skb(NFCT_FRAG6_CB(skb)->orig);
+
+	kfree_skb(skb);
+}
+
+static inline void frag_free_queue(struct nf_ct_frag6_queue *fq)
+{
+	atomic_sub(sizeof(struct nf_ct_frag6_queue), &nf_ct_frag6_mem);
+	kfree(fq);
+}
+
+static inline struct nf_ct_frag6_queue *frag_alloc_queue(void)
+{
+	struct nf_ct_frag6_queue *fq = kmalloc(sizeof(struct nf_ct_frag6_queue), GFP_ATOMIC);
+
+	if (!fq)
+		return NULL;
+	atomic_add(sizeof(struct nf_ct_frag6_queue), &nf_ct_frag6_mem);
+	return fq;
+}
+
+/* Destruction primitives. */
+
+/* Complete destruction of fq. */
+static void nf_ct_frag6_destroy(struct nf_ct_frag6_queue *fq)
+{
+	struct sk_buff *fp;
+
+	BUG_TRAP(fq->last_in&COMPLETE);
+	BUG_TRAP(del_timer(&fq->timer) == 0);
+
+	/* Release all fragment data. */
+	fp = fq->fragments;
+	while (fp) {
+		struct sk_buff *xp = fp->next;
+
+		frag_kfree_skb(fp);
+		fp = xp;
+	}
+
+	frag_free_queue(fq);
+}
+
+static __inline__ void fq_put(struct nf_ct_frag6_queue *fq)
+{
+	if (atomic_dec_and_test(&fq->refcnt))
+		nf_ct_frag6_destroy(fq);
+}
+
+/* Kill fq entry. It is not destroyed immediately,
+ * because caller (and someone more) holds reference count.
+ */
+static __inline__ void fq_kill(struct nf_ct_frag6_queue *fq)
+{
+	if (del_timer(&fq->timer))
+		atomic_dec(&fq->refcnt);
+
+	if (!(fq->last_in & COMPLETE)) {
+		fq_unlink(fq);
+		atomic_dec(&fq->refcnt);
+		fq->last_in |= COMPLETE;
+	}
+}
+
+static void nf_ct_frag6_evictor(void)
+{
+	struct nf_ct_frag6_queue *fq;
+	struct list_head *tmp;
+
+	for (;;) {
+		if (atomic_read(&nf_ct_frag6_mem) <= nf_ct_frag6_low_thresh)
+			return;
+		read_lock(&nf_ct_frag6_lock);
+		if (list_empty(&nf_ct_frag6_lru_list)) {
+			read_unlock(&nf_ct_frag6_lock);
+			return;
+		}
+		tmp = nf_ct_frag6_lru_list.next;
+		fq = list_entry(tmp, struct nf_ct_frag6_queue, lru_list);
+		atomic_inc(&fq->refcnt);
+		read_unlock(&nf_ct_frag6_lock);
+
+		spin_lock(&fq->lock);
+		if (!(fq->last_in&COMPLETE))
+			fq_kill(fq);
+		spin_unlock(&fq->lock);
+
+		fq_put(fq);
+	}
+}
+
+static void nf_ct_frag6_expire(unsigned long data)
+{
+	struct nf_ct_frag6_queue *fq = (struct nf_ct_frag6_queue *) data;
+
+	spin_lock(&fq->lock);
+
+	if (fq->last_in & COMPLETE)
+		goto out;
+
+	fq_kill(fq);
+
+out:
+	spin_unlock(&fq->lock);
+	fq_put(fq);
+}
+
+/* Creation primitives. */
+
+
+static struct nf_ct_frag6_queue *nf_ct_frag6_intern(unsigned int hash,
+					  struct nf_ct_frag6_queue *fq_in)
+{
+	struct nf_ct_frag6_queue *fq;
+
+	write_lock(&nf_ct_frag6_lock);
+#ifdef CONFIG_SMP
+	for (fq = nf_ct_frag6_hash[hash]; fq; fq = fq->next) {
+		if (fq->id == fq_in->id && 
+		    !ipv6_addr_cmp(&fq_in->saddr, &fq->saddr) &&
+		    !ipv6_addr_cmp(&fq_in->daddr, &fq->daddr)) {
+			atomic_inc(&fq->refcnt);
+			write_unlock(&nf_ct_frag6_lock);
+			fq_in->last_in |= COMPLETE;
+			fq_put(fq_in);
+			return fq;
+		}
+	}
+#endif
+	fq = fq_in;
+
+	if (!mod_timer(&fq->timer, jiffies + nf_ct_frag6_timeout))
+		atomic_inc(&fq->refcnt);
+
+	atomic_inc(&fq->refcnt);
+	if ((fq->next = nf_ct_frag6_hash[hash]) != NULL)
+		fq->next->pprev = &fq->next;
+	nf_ct_frag6_hash[hash] = fq;
+	fq->pprev = &nf_ct_frag6_hash[hash];
+	INIT_LIST_HEAD(&fq->lru_list);
+	list_add_tail(&fq->lru_list, &nf_ct_frag6_lru_list);
+	nf_ct_frag6_nqueues++;
+	write_unlock(&nf_ct_frag6_lock);
+	return fq;
+}
+
+
+static struct nf_ct_frag6_queue *
+nf_ct_frag6_create(unsigned int hash, u32 id, struct in6_addr *src,				   struct in6_addr *dst)
+{
+	struct nf_ct_frag6_queue *fq;
+
+	if ((fq = frag_alloc_queue()) == NULL) {
+		DEBUGP("Can't alloc new queue\n");
+		goto oom;
+	}
+
+	memset(fq, 0, sizeof(struct nf_ct_frag6_queue));
+
+	fq->id = id;
+	ipv6_addr_copy(&fq->saddr, src);
+	ipv6_addr_copy(&fq->daddr, dst);
+
+	init_timer(&fq->timer);
+	fq->timer.function = nf_ct_frag6_expire;
+	fq->timer.data = (long) fq;
+	fq->lock = SPIN_LOCK_UNLOCKED;
+	atomic_set(&fq->refcnt, 1);
+
+	return nf_ct_frag6_intern(hash, fq);
+
+oom:
+	return NULL;
+}
+
+static __inline__ struct nf_ct_frag6_queue *
+fq_find(u32 id, struct in6_addr *src, struct in6_addr *dst)
+{
+	struct nf_ct_frag6_queue *fq;
+	unsigned int hash = ip6qhashfn(id, src, dst);
+
+	read_lock(&nf_ct_frag6_lock);
+	for (fq = nf_ct_frag6_hash[hash]; fq; fq = fq->next) {
+		if (fq->id == id && 
+		    !ipv6_addr_cmp(src, &fq->saddr) &&
+		    !ipv6_addr_cmp(dst, &fq->daddr)) {
+			atomic_inc(&fq->refcnt);
+			read_unlock(&nf_ct_frag6_lock);
+			return fq;
+		}
+	}
+	read_unlock(&nf_ct_frag6_lock);
+
+	return nf_ct_frag6_create(hash, id, src, dst);
+}
+
+
+static int nf_ct_frag6_queue(struct nf_ct_frag6_queue *fq, struct sk_buff *skb, 
+			     struct frag_hdr *fhdr, int nhoff)
+{
+	struct sk_buff *prev, *next;
+	int offset, end;
+
+	if (fq->last_in & COMPLETE) {
+		DEBUGP("Allready completed\n");
+		goto err;
+	}
+
+	offset = ntohs(fhdr->frag_off) & ~0x7;
+	end = offset + (ntohs(skb->nh.ipv6h->payload_len) -
+			((u8 *) (fhdr + 1) - (u8 *) (skb->nh.ipv6h + 1)));
+
+	if ((unsigned int)end > IPV6_MAXPLEN) {
+		DEBUGP("offset is too large.\n");
+ 		return -1;
+	}
+
+ 	if (skb->ip_summed == CHECKSUM_HW)
+ 		skb->csum = csum_sub(skb->csum,
+ 				     csum_partial(skb->nh.raw,
+						  (u8*)(fhdr + 1) - skb->nh.raw,
+						  0));
+
+	/* Is this the final fragment? */
+	if (!(fhdr->frag_off & htons(IP6_MF))) {
+		/* If we already have some bits beyond end
+		 * or have different end, the segment is corrupted.
+		 */
+		if (end < fq->len ||
+		    ((fq->last_in & LAST_IN) && end != fq->len)) {
+			DEBUGP("already received last fragment\n");
+			goto err;
+		}
+		fq->last_in |= LAST_IN;
+		fq->len = end;
+	} else {
+		/* Check if the fragment is rounded to 8 bytes.
+		 * Required by the RFC.
+		 */
+		if (end & 0x7) {
+			/* RFC2460 says always send parameter problem in
+			 * this case. -DaveM
+			 */
+			DEBUGP("the end of this fragment is not rounded to 8 bytes.\n");
+			return -1;
+		}
+		if (end > fq->len) {
+			/* Some bits beyond end -> corruption. */
+			if (fq->last_in & LAST_IN) {
+				DEBUGP("last packet already reached.\n");
+				goto err;
+			}
+			fq->len = end;
+		}
+	}
+
+	if (end == offset)
+		goto err;
+
+	/* Point into the IP datagram 'data' part. */
+	if (!pskb_pull(skb, (u8 *) (fhdr + 1) - skb->data)) {
+		DEBUGP("queue: message is too short.\n");
+		goto err;
+	}
+	if (end-offset < skb->len) {
+		if (pskb_trim(skb, end - offset)) {
+			DEBUGP("Can't trim\n");
+			goto err;
+		}
+		if (skb->ip_summed != CHECKSUM_UNNECESSARY)
+			skb->ip_summed = CHECKSUM_NONE;
+	}
+
+	/* Find out which fragments are in front and at the back of us
+	 * in the chain of fragments so far.  We must know where to put
+	 * this fragment, right?
+	 */
+	prev = NULL;
+	for (next = fq->fragments; next != NULL; next = next->next) {
+		if (NFCT_FRAG6_CB(next)->offset >= offset)
+			break;	/* bingo! */
+		prev = next;
+	}
+
+	/* We found where to put this one.  Check for overlap with
+	 * preceding fragment, and, if needed, align things so that
+	 * any overlaps are eliminated.
+	 */
+	if (prev) {
+		int i = (NFCT_FRAG6_CB(prev)->offset + prev->len) - offset;
+
+		if (i > 0) {
+			offset += i;
+			if (end <= offset) {
+				DEBUGP("overlap\n");
+				goto err;
+			}
+			if (!pskb_pull(skb, i)) {
+				DEBUGP("Can't pull\n");
+				goto err;
+			}
+			if (skb->ip_summed != CHECKSUM_UNNECESSARY)
+				skb->ip_summed = CHECKSUM_NONE;
+		}
+	}
+
+	/* Look for overlap with succeeding segments.
+	 * If we can merge fragments, do it.
+	 */
+	while (next && NFCT_FRAG6_CB(next)->offset < end) {
+		/* overlap is 'i' bytes */
+		int i = end - NFCT_FRAG6_CB(next)->offset;
+
+		if (i < next->len) {
+			/* Eat head of the next overlapped fragment
+			 * and leave the loop. The next ones cannot overlap.
+			 */
+			DEBUGP("Eat head of the overlapped parts.: %d", i);
+			if (!pskb_pull(next, i))
+				goto err;
+
+			/* next fragment */
+			NFCT_FRAG6_CB(next)->offset += i;
+			fq->meat -= i;
+			if (next->ip_summed != CHECKSUM_UNNECESSARY)
+				next->ip_summed = CHECKSUM_NONE;
+			break;
+		} else {
+			struct sk_buff *free_it = next;
+
+			/* Old fragmnet is completely overridden with
+			 * new one drop it.
+			 */
+			next = next->next;
+
+			if (prev)
+				prev->next = next;
+			else
+				fq->fragments = next;
+
+			fq->meat -= free_it->len;
+			frag_kfree_skb(free_it);
+		}
+	}
+
+	NFCT_FRAG6_CB(skb)->offset = offset;
+
+	/* Insert this fragment in the chain of fragments. */
+	skb->next = next;
+	if (prev)
+		prev->next = skb;
+	else
+		fq->fragments = skb;
+
+	skb->dev = NULL;
+	skb_get_timestamp(skb, &fq->stamp);
+	fq->meat += skb->len;
+	atomic_add(skb->truesize, &nf_ct_frag6_mem);
+
+	/* The first fragment.
+	 * nhoffset is obtained from the first fragment, of course.
+	 */
+	if (offset == 0) {
+		fq->nhoffset = nhoff;
+		fq->last_in |= FIRST_IN;
+	}
+	write_lock(&nf_ct_frag6_lock);
+	list_move_tail(&fq->lru_list, &nf_ct_frag6_lru_list);
+	write_unlock(&nf_ct_frag6_lock);
+	return 0;
+
+err:
+	return -1;
+}
+
+/*
+ *	Check if this packet is complete.
+ *	Returns NULL on failure by any reason, and pointer
+ *	to current nexthdr field in reassembled frame.
+ *
+ *	It is called with locked fq, and caller must check that
+ *	queue is eligible for reassembly i.e. it is not COMPLETE,
+ *	the last and the first frames arrived and all the bits are here.
+ */
+static struct sk_buff *
+nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
+{
+	struct sk_buff *fp, *op, *head = fq->fragments;
+	int    payload_len;
+
+	fq_kill(fq);
+
+	BUG_TRAP(head != NULL);
+	BUG_TRAP(NFCT_FRAG6_CB(head)->offset == 0);
+
+	/* Unfragmented part is taken from the first segment. */
+	payload_len = (head->data - head->nh.raw) - sizeof(struct ipv6hdr) + fq->len - sizeof(struct frag_hdr);
+	if (payload_len > IPV6_MAXPLEN) {
+		DEBUGP("payload len is too large.\n");
+		goto out_oversize;
+	}
+
+	/* Head of list must not be cloned. */
+	if (skb_cloned(head) && pskb_expand_head(head, 0, 0, GFP_ATOMIC)) {
+		DEBUGP("skb is cloned but can't expand head");
+		goto out_oom;
+	}
+
+	/* If the first fragment is fragmented itself, we split
+	 * it to two chunks: the first with data and paged part
+	 * and the second, holding only fragments. */
+	if (skb_shinfo(head)->frag_list) {
+		struct sk_buff *clone;
+		int i, plen = 0;
+
+		if ((clone = alloc_skb(0, GFP_ATOMIC)) == NULL) {
+			DEBUGP("Can't alloc skb\n");
+			goto out_oom;
+		}
+		clone->next = head->next;
+		head->next = clone;
+		skb_shinfo(clone)->frag_list = skb_shinfo(head)->frag_list;
+		skb_shinfo(head)->frag_list = NULL;
+		for (i=0; i<skb_shinfo(head)->nr_frags; i++)
+			plen += skb_shinfo(head)->frags[i].size;
+		clone->len = clone->data_len = head->data_len - plen;
+		head->data_len -= clone->len;
+		head->len -= clone->len;
+		clone->csum = 0;
+		clone->ip_summed = head->ip_summed;
+
+		NFCT_FRAG6_CB(clone)->orig = NULL;
+		atomic_add(clone->truesize, &nf_ct_frag6_mem);
+	}
+
+	/* We have to remove fragment header from datagram and to relocate
+	 * header in order to calculate ICV correctly. */
+	head->nh.raw[fq->nhoffset] = head->h.raw[0];
+	memmove(head->head + sizeof(struct frag_hdr), head->head, 
+		(head->data - head->head) - sizeof(struct frag_hdr));
+	head->mac.raw += sizeof(struct frag_hdr);
+	head->nh.raw += sizeof(struct frag_hdr);
+
+	skb_shinfo(head)->frag_list = head->next;
+	head->h.raw = head->data;
+	skb_push(head, head->data - head->nh.raw);
+	atomic_sub(head->truesize, &nf_ct_frag6_mem);
+
+	for (fp=head->next; fp; fp = fp->next) {
+		head->data_len += fp->len;
+		head->len += fp->len;
+		if (head->ip_summed != fp->ip_summed)
+			head->ip_summed = CHECKSUM_NONE;
+		else if (head->ip_summed == CHECKSUM_HW)
+			head->csum = csum_add(head->csum, fp->csum);
+		head->truesize += fp->truesize;
+		atomic_sub(fp->truesize, &nf_ct_frag6_mem);
+	}
+
+	head->next = NULL;
+	head->dev = dev;
+	skb_set_timestamp(head, &fq->stamp);
+	head->nh.ipv6h->payload_len = htons(payload_len);
+
+	/* Yes, and fold redundant checksum back. 8) */
+	if (head->ip_summed == CHECKSUM_HW)
+		head->csum = csum_partial(head->nh.raw, head->h.raw-head->nh.raw, head->csum);
+
+	fq->fragments = NULL;
+
+	/* all original skbs are linked into the NFCT_FRAG6_CB(head).orig */
+	fp = skb_shinfo(head)->frag_list;
+	if (NFCT_FRAG6_CB(fp)->orig == NULL)
+		/* at above code, head skb is divided into two skbs. */
+		fp = fp->next;
+
+	op = NFCT_FRAG6_CB(head)->orig;
+	for (; fp; fp = fp->next) {
+		struct sk_buff *orig = NFCT_FRAG6_CB(fp)->orig;
+
+		op->next = orig;
+		op = orig;
+		NFCT_FRAG6_CB(fp)->orig = NULL;
+	}
+
+	return head;
+
+out_oversize:
+	if (net_ratelimit())
+		printk(KERN_DEBUG "nf_ct_frag6_reasm: payload len = %d\n", payload_len);
+	goto out_fail;
+out_oom:
+	if (net_ratelimit())
+		printk(KERN_DEBUG "nf_ct_frag6_reasm: no memory for reassembly\n");
+out_fail:
+	return NULL;
+}
+
+/*
+ * find the header just before Fragment Header.
+ *
+ * if success return 0 and set ...
+ * (*prevhdrp): the value of "Next Header Field" in the header
+ *		just before Fragment Header.
+ * (*prevhoff): the offset of "Next Header Field" in the header
+ *		just before Fragment Header.
+ * (*fhoff)   : the offset of Fragment Header.
+ *
+ * Based on ipv6_skip_hdr() in net/ipv6/exthdr.c
+ *
+ */
+static int
+find_prev_fhdr(struct sk_buff *skb, u8 *prevhdrp, int *prevhoff, int *fhoff)
+{
+        u8 nexthdr = skb->nh.ipv6h->nexthdr;
+	u8 prev_nhoff = (u8 *)&skb->nh.ipv6h->nexthdr - skb->data;
+	int start = (u8 *)(skb->nh.ipv6h+1) - skb->data;
+	int len = skb->len - start;
+	u8 prevhdr = NEXTHDR_IPV6;
+
+        while (nexthdr != NEXTHDR_FRAGMENT) {
+                struct ipv6_opt_hdr hdr;
+                int hdrlen;
+
+		if (!ipv6_ext_hdr(nexthdr)) {
+			return -1;
+		}
+                if (len < (int)sizeof(struct ipv6_opt_hdr)) {
+			DEBUGP("too short\n");
+			return -1;
+		}
+                if (nexthdr == NEXTHDR_NONE) {
+			DEBUGP("next header is none\n");
+			return -1;
+		}
+                if (skb_copy_bits(skb, start, &hdr, sizeof(hdr)))
+                        BUG();
+                if (nexthdr == NEXTHDR_AUTH)
+                        hdrlen = (hdr.hdrlen+2)<<2;
+                else
+                        hdrlen = ipv6_optlen(&hdr);
+
+		prevhdr = nexthdr;
+		prev_nhoff = start;
+
+                nexthdr = hdr.nexthdr;
+                len -= hdrlen;
+                start += hdrlen;
+        }
+
+	if (len < 0)
+		return -1;
+
+	*prevhdrp = prevhdr;
+	*prevhoff = prev_nhoff;
+	*fhoff = start;
+
+	return 0;
+}
+
+struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb)
+{
+	struct sk_buff *clone; 
+	struct net_device *dev = skb->dev;
+	struct frag_hdr *fhdr;
+	struct nf_ct_frag6_queue *fq;
+	struct ipv6hdr *hdr;
+	int fhoff, nhoff;
+	u8 prevhdr;
+	struct sk_buff *ret_skb = NULL;
+
+	/* Jumbo payload inhibits frag. header */
+	if (skb->nh.ipv6h->payload_len == 0) {
+		DEBUGP("payload len = 0\n");
+		return skb;
+	}
+
+	if (find_prev_fhdr(skb, &prevhdr, &nhoff, &fhoff) < 0)
+		return skb;
+
+	clone = skb_clone(skb, GFP_ATOMIC);
+	if (clone == NULL) {
+		DEBUGP("Can't clone skb\n");
+		return skb;
+	}
+
+	NFCT_FRAG6_CB(clone)->orig = skb;
+
+	if (!pskb_may_pull(clone, fhoff + sizeof(*fhdr))) {
+		DEBUGP("message is too short.\n");
+		goto ret_orig;
+	}
+
+	clone->h.raw = clone->data + fhoff;
+	hdr = clone->nh.ipv6h;
+	fhdr = (struct frag_hdr *)clone->h.raw;
+
+	if (!(fhdr->frag_off & htons(0xFFF9))) {
+		DEBUGP("Invalid fragment offset\n");
+		/* It is not a fragmented frame */
+		goto ret_orig;
+	}
+
+	if (atomic_read(&nf_ct_frag6_mem) > nf_ct_frag6_high_thresh)
+		nf_ct_frag6_evictor();
+
+	fq = fq_find(fhdr->identification, &hdr->saddr, &hdr->daddr);
+	if (fq == NULL) {
+		DEBUGP("Can't find and can't create new queue\n");
+		goto ret_orig;
+	}
+
+	spin_lock(&fq->lock);
+
+	if (nf_ct_frag6_queue(fq, clone, fhdr, nhoff) < 0) {
+		spin_unlock(&fq->lock);
+		DEBUGP("Can't insert skb to queue\n");
+		fq_put(fq);
+		goto ret_orig;
+	}
+
+	if (fq->last_in == (FIRST_IN|LAST_IN) && fq->meat == fq->len) {
+		ret_skb = nf_ct_frag6_reasm(fq, dev);
+		if (ret_skb == NULL)
+			DEBUGP("Can't reassemble fragmented packets\n");
+	}
+	spin_unlock(&fq->lock);
+
+	fq_put(fq);
+	return ret_skb;
+
+ret_orig:
+	kfree_skb(clone);
+	return skb;
+}
+
+void nf_ct_frag6_output(unsigned int hooknum, struct sk_buff *skb,
+			struct net_device *in, struct net_device *out,
+			int (*okfn)(struct sk_buff *))
+{
+	struct sk_buff *s, *s2;
+
+	for (s = NFCT_FRAG6_CB(skb)->orig; s;) {
+		nf_conntrack_put_reasm(s->nfct_reasm);
+		nf_conntrack_get_reasm(skb);
+		s->nfct_reasm = skb;
+
+		s2 = s->next;
+		NF_HOOK_THRESH(PF_INET6, hooknum, s, in, out, okfn,
+			       NF_IP6_PRI_CONNTRACK_DEFRAG + 1);
+		s = s2;
+	}
+	nf_conntrack_put_reasm(skb);
+}
+
+int nf_ct_frag6_kfree_frags(struct sk_buff *skb)
+{
+	struct sk_buff *s, *s2;
+
+	for (s = NFCT_FRAG6_CB(skb)->orig; s; s = s2) {
+
+		s2 = s->next;
+		kfree_skb(s);
+	}
+
+	kfree_skb(skb);
+
+	return 0;
+}
+
+int nf_ct_frag6_init(void)
+{
+	nf_ct_frag6_hash_rnd = (u32) ((num_physpages ^ (num_physpages>>7)) ^
+				   (jiffies ^ (jiffies >> 6)));
+
+	init_timer(&nf_ct_frag6_secret_timer);
+	nf_ct_frag6_secret_timer.function = nf_ct_frag6_secret_rebuild;
+	nf_ct_frag6_secret_timer.expires = jiffies
+					   + nf_ct_frag6_secret_interval;
+	add_timer(&nf_ct_frag6_secret_timer);
+
+	return 0;
+}
+
+void nf_ct_frag6_cleanup(void)
+{
+	del_timer(&nf_ct_frag6_secret_timer);
+	nf_ct_frag6_evictor();
+}
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index a1265a320b117..651c79b41eeb1 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -174,8 +174,10 @@ int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
 			struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
 
 			/* Not releasing hash table! */
-			if (clone)
+			if (clone) {
+				nf_reset(clone);
 				rawv6_rcv(sk, clone);
+			}
 		}
 		sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr,
 				     IP6CB(skb)->iif);