Re: [PATCH] update raw patch in POM [2.4.x]

[Roberto Nibali <ratz@tac.ch>]

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> What about packet sockets? raw sockets actually don't matter, the
> reference is dropped before it reaches them. Please send me the raw
> table patch you're using.

Attached is the raw patch I use.

Regards,
Roberto Nibali, ratz
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diff -Nur linux-2.4.31-orig/Documentation/Configure.help linux-2.4.31-pab2/Documentation/Configure.help
--- linux-2.4.31-orig/Documentation/Configure.help	2005-04-04 03:42:19 +0200
+++ linux-2.4.31-pab2/Documentation/Configure.help	2005-06-15 15:19:43 +0200
@@ -3016,6 +3016,34 @@
   If you want to compile it as a module, say M here and read
   <file:Documentation/modules.txt>.  If unsure, say `N'.
 
+raw table support (required for NOTRACK/TRACE)
+CONFIG_IP_NF_RAW
+  This option adds a `raw' table to iptables. This table is the very
+  first in the netfilter framework and hooks in at the PREROUTING
+  and OUTPUT chains.
+
+  If you want to compile it as a module, say M here and read
+  <file:Documentation/modules.txt>.  If unsure, say `N'.
+
+NOTRACK target support
+CONFIG_IP_NF_TARGET_NOTRACK
+  The NOTRACK target allows a select rule to specify
+  which packets *not* to enter the conntrack/NAT
+  subsystem with all the consequences (no ICMP error tracking,
+  no protocol helpers for the selected packets).
+
+  If you want to compile it as a module, say M here and read
+  <file:Documentation/modules.txt>.  If unsure, say `N'.
+
+raw table support (required for TRACE)
+CONFIG_IP6_NF_RAW
+  This option adds a `raw' table to ip6tables. This table is the very
+  first in the netfilter framework and hooks in at the PREROUTING
+  and OUTPUT chains.
+
+  If you want to compile it as a module, say M here and read
+  <file:Documentation/modules.txt>.  If unsure, say `N'.
+
 Packet filtering
 CONFIG_IP_NF_FILTER
   Packet filtering defines a table `filter', which has a series of
diff -Nur linux-2.4.31-orig/include/linux/netfilter_ipv4/ip_conntrack.h linux-2.4.31-pab2/include/linux/netfilter_ipv4/ip_conntrack.h
--- linux-2.4.31-orig/include/linux/netfilter_ipv4/ip_conntrack.h	2005-06-15 15:20:12 +0200
+++ linux-2.4.31-pab2/include/linux/netfilter_ipv4/ip_conntrack.h	2005-06-15 15:19:43 +0200
@@ -254,6 +254,9 @@
 /* Call me when a conntrack is destroyed. */
 extern void (*ip_conntrack_destroyed)(struct ip_conntrack *conntrack);
 
+/* Fake conntrack entry for untracked connections */
+extern struct ip_conntrack ip_conntrack_untracked;
+
 /* Returns new sk_buff, or NULL */
 struct sk_buff *
 ip_ct_gather_frags(struct sk_buff *skb, u_int32_t user);
diff -Nur linux-2.4.31-orig/include/linux/netfilter_ipv4/ipt_conntrack.h linux-2.4.31-pab2/include/linux/netfilter_ipv4/ipt_conntrack.h
--- linux-2.4.31-orig/include/linux/netfilter_ipv4/ipt_conntrack.h	2002-11-29 00:53:15 +0100
+++ linux-2.4.31-pab2/include/linux/netfilter_ipv4/ipt_conntrack.h	2005-06-15 15:19:43 +0200
@@ -10,6 +10,7 @@
 
 #define IPT_CONNTRACK_STATE_SNAT (1 << (IP_CT_NUMBER + 1))
 #define IPT_CONNTRACK_STATE_DNAT (1 << (IP_CT_NUMBER + 2))
+#define IPT_CONNTRACK_STATE_UNTRACKED (1 << (IP_CT_NUMBER + 3))
 
 /* flags, invflags: */
 #define IPT_CONNTRACK_STATE	0x01
diff -Nur linux-2.4.31-orig/include/linux/netfilter_ipv4/ipt_state.h linux-2.4.31-pab2/include/linux/netfilter_ipv4/ipt_state.h
--- linux-2.4.31-orig/include/linux/netfilter_ipv4/ipt_state.h	2000-04-14 18:37:20 +0200
+++ linux-2.4.31-pab2/include/linux/netfilter_ipv4/ipt_state.h	2005-06-15 15:19:43 +0200
@@ -3,6 +3,7 @@
 
 #define IPT_STATE_BIT(ctinfo) (1 << ((ctinfo)%IP_CT_IS_REPLY+1))
 #define IPT_STATE_INVALID (1 << 0)
+#define IPT_STATE_UNTRACKED (1 << (IP_CT_NUMBER + 1))
 
 struct ipt_state_info
 {
diff -Nur linux-2.4.31-orig/include/linux/netfilter_ipv4.h linux-2.4.31-pab2/include/linux/netfilter_ipv4.h
--- linux-2.4.31-orig/include/linux/netfilter_ipv4.h	2002-02-25 20:38:13 +0100
+++ linux-2.4.31-pab2/include/linux/netfilter_ipv4.h	2005-06-15 15:19:43 +0200
@@ -51,6 +51,8 @@
 
 enum nf_ip_hook_priorities {
 	NF_IP_PRI_FIRST = INT_MIN,
+	NF_IP_PRI_CONNTRACK_DEFRAG = -400,
+	NF_IP_PRI_RAW = -300,
 	NF_IP_PRI_CONNTRACK = -200,
 	NF_IP_PRI_MANGLE = -150,
 	NF_IP_PRI_NAT_DST = -100,
diff -Nur linux-2.4.31-orig/net/ipv4/netfilter/Config.in linux-2.4.31-pab2/net/ipv4/netfilter/Config.in
--- linux-2.4.31-orig/net/ipv4/netfilter/Config.in	2005-01-19 15:10:13 +0100
+++ linux-2.4.31-pab2/net/ipv4/netfilter/Config.in	2005-06-15 15:19:43 +0200
@@ -107,6 +107,15 @@
   dep_tristate '  LOG target support' CONFIG_IP_NF_TARGET_LOG $CONFIG_IP_NF_IPTABLES
   dep_tristate '  ULOG target support' CONFIG_IP_NF_TARGET_ULOG $CONFIG_IP_NF_IPTABLES
   dep_tristate '  TCPMSS target support' CONFIG_IP_NF_TARGET_TCPMSS $CONFIG_IP_NF_IPTABLES
+  if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+    tristate '  raw table support (required for NOTRACK/TRACE)' CONFIG_IP_NF_RAW $CONFIG_IP_NF_IPTABLES
+  fi
+  if [ "$CONFIG_IP_NF_RAW" != "n" ]; then
+    if [ "$CONFIG_IP_NF_CONNTRACK" != "n" ]; then
+      dep_tristate '    NOTRACK target support' CONFIG_IP_NF_TARGET_NOTRACK $CONFIG_IP_NF_RAW
+    fi
+  # Marker for TRACE target
+  fi
 fi
 
 tristate 'ARP tables support' CONFIG_IP_NF_ARPTABLES
diff -Nur linux-2.4.31-orig/net/ipv4/netfilter/Makefile linux-2.4.31-pab2/net/ipv4/netfilter/Makefile
--- linux-2.4.31-orig/net/ipv4/netfilter/Makefile	2005-06-15 15:20:12 +0200
+++ linux-2.4.31-pab2/net/ipv4/netfilter/Makefile	2005-06-15 15:19:43 +0200
@@ -65,6 +65,7 @@
 obj-$(CONFIG_IP_NF_FILTER) += iptable_filter.o
 obj-$(CONFIG_IP_NF_MANGLE) += iptable_mangle.o
 obj-$(CONFIG_IP_NF_NAT) += iptable_nat.o
+obj-$(CONFIG_IP_NF_RAW) += iptable_raw.o
 
 # matches
 obj-$(CONFIG_IP_NF_MATCH_HELPER) += ipt_helper.o
@@ -90,6 +91,7 @@
 obj-$(CONFIG_IP_NF_MATCH_CONNTRACK) += ipt_conntrack.o
 obj-$(CONFIG_IP_NF_MATCH_UNCLEAN) += ipt_unclean.o
 obj-$(CONFIG_IP_NF_MATCH_TCPMSS) += ipt_tcpmss.o
+obj-$(CONFIG_IP_NF_TARGET_NOTRACK) += ipt_NOTRACK.o
 
 # targets
 obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
diff -Nur linux-2.4.31-orig/net/ipv4/netfilter/ip_conntrack_core.c linux-2.4.31-pab2/net/ipv4/netfilter/ip_conntrack_core.c
--- linux-2.4.31-orig/net/ipv4/netfilter/ip_conntrack_core.c	2005-06-15 15:20:12 +0200
+++ linux-2.4.31-pab2/net/ipv4/netfilter/ip_conntrack_core.c	2005-06-15 15:19:43 +0200
@@ -65,6 +65,7 @@
 struct list_head *ip_conntrack_hash;
 static kmem_cache_t *ip_conntrack_cachep;
 static LIST_HEAD(unconfirmed);
+struct ip_conntrack ip_conntrack_untracked;
 
 extern struct ip_conntrack_protocol ip_conntrack_generic_protocol;
 
@@ -823,6 +824,19 @@
 	int set_reply;
 	int ret;
 
+	/* Previously seen (loopback or untracked)?  Ignore. */
+	if ((*pskb)->nfct)
+		return NF_ACCEPT;
+
+	/* Never happen */
+	if ((*pskb)->nh.iph->frag_off & htons(IP_OFFSET)) {
+		if (net_ratelimit()) {
+		printk(KERN_ERR "ip_conntrack_in: Frag of proto %u (hook=%u)\n",
+		       (*pskb)->nh.iph->protocol, hooknum);
+		}
+		return NF_DROP;
+	}
+
 	/* FIXME: Do this right please. --RR */
 	(*pskb)->nfcache |= NFC_UNKNOWN;
 
@@ -841,21 +855,6 @@
 	}
 #endif
 
-	/* Previously seen (loopback)?  Ignore.  Do this before
-           fragment check. */
-	if ((*pskb)->nfct)
-		return NF_ACCEPT;
-
-	/* Gather fragments. */
-	if ((*pskb)->nh.iph->frag_off & htons(IP_MF|IP_OFFSET)) {
-		*pskb = ip_ct_gather_frags(*pskb,
-		                           hooknum == NF_IP_PRE_ROUTING ?
-		                           IP_DEFRAG_CONNTRACK_IN :
-		                           IP_DEFRAG_CONNTRACK_OUT);
-		if (!*pskb)
-			return NF_STOLEN;
-	}
-
 	proto = ip_ct_find_proto((*pskb)->nh.iph->protocol);
 
 	/* It may be an icmp error... */
@@ -1460,6 +1459,18 @@
 
 	/* For use by ipt_REJECT */
 	ip_ct_attach = ip_conntrack_attach;
+
+	/* Set up fake conntrack:
+	 	- to never be deleted, not in any hashes */
+	atomic_set(&ip_conntrack_untracked.ct_general.use, 1);
+	/*	- and look it like as a confirmed connection */
+	set_bit(IPS_CONFIRMED_BIT, &ip_conntrack_untracked.status);
+	/*	- and prepare the ctinfo field for REJECT/NAT. */
+	ip_conntrack_untracked.infos[IP_CT_NEW].master =
+	ip_conntrack_untracked.infos[IP_CT_RELATED].master =
+	ip_conntrack_untracked.infos[IP_CT_RELATED + IP_CT_IS_REPLY].master =
+		&ip_conntrack_untracked.ct_general;
+
 	return ret;
 
 err_free_hash:
diff -Nur linux-2.4.31-orig/net/ipv4/netfilter/ip_conntrack_standalone.c linux-2.4.31-pab2/net/ipv4/netfilter/ip_conntrack_standalone.c
--- linux-2.4.31-orig/net/ipv4/netfilter/ip_conntrack_standalone.c	2005-06-15 15:20:12 +0200
+++ linux-2.4.31-pab2/net/ipv4/netfilter/ip_conntrack_standalone.c	2005-06-15 15:19:43 +0200
@@ -189,6 +189,29 @@
 	return ip_conntrack_confirm(*pskb);
 }
 
+static unsigned int ip_conntrack_defrag(unsigned int hooknum,
+					struct sk_buff **pskb,
+					const struct net_device *in,
+					const struct net_device *out,
+					int (*okfn)(struct sk_buff *))
+{
+	/* Previously seen (loopback)?  Ignore.  Do this before
+	 * fragment check. */
+	if ((*pskb)->nfct)
+		return NF_ACCEPT;
+
+        /* Gather fragments. */
+        if ((*pskb)->nh.iph->frag_off & htons(IP_MF|IP_OFFSET)) {
+                *pskb = ip_ct_gather_frags(*pskb,
+                                           hooknum == NF_IP_PRE_ROUTING ?
+                                           IP_DEFRAG_CONNTRACK_IN :
+                                           IP_DEFRAG_CONNTRACK_OUT);
+                if (!*pskb)
+                        return NF_STOLEN;
+        }
+	return NF_ACCEPT;
+}
+
 static unsigned int ip_refrag(unsigned int hooknum,
 			      struct sk_buff **pskb,
 			      const struct net_device *in,
@@ -230,9 +253,15 @@
 
 /* Connection tracking may drop packets, but never alters them, so
    make it the first hook. */
+static struct nf_hook_ops ip_conntrack_defrag_ops
+= { { NULL, NULL }, ip_conntrack_defrag, PF_INET, NF_IP_PRE_ROUTING,
+	NF_IP_PRI_CONNTRACK_DEFRAG };
 static struct nf_hook_ops ip_conntrack_in_ops
 = { { NULL, NULL }, ip_conntrack_in, PF_INET, NF_IP_PRE_ROUTING,
 	NF_IP_PRI_CONNTRACK };
+static struct nf_hook_ops ip_conntrack_defrag_local_out_ops
+= { { NULL, NULL }, ip_conntrack_defrag, PF_INET, NF_IP_LOCAL_OUT,
+	NF_IP_PRI_CONNTRACK_DEFRAG };
 static struct nf_hook_ops ip_conntrack_local_out_ops
 = { { NULL, NULL }, ip_conntrack_local, PF_INET, NF_IP_LOCAL_OUT,
 	NF_IP_PRI_CONNTRACK };
@@ -373,10 +402,21 @@
 	if (!proc) goto cleanup_init;
 	proc->owner = THIS_MODULE;
 
+	ret = nf_register_hook(&ip_conntrack_defrag_ops);
+	if (ret < 0) {
+		printk("ip_conntrack: can't register pre-routing defrag hook.\n");
+		goto cleanup_proc;
+	}
+	ret = nf_register_hook(&ip_conntrack_defrag_local_out_ops);
+	if (ret < 0) {
+		printk("ip_conntrack: can't register local_out defrag hook.\n");
+		goto cleanup_defragops;
+	}
+
 	ret = nf_register_hook(&ip_conntrack_in_ops);
 	if (ret < 0) {
 		printk("ip_conntrack: can't register pre-routing hook.\n");
-		goto cleanup_proc;
+		goto cleanup_defraglocalops;
 	}
 	ret = nf_register_hook(&ip_conntrack_local_out_ops);
 	if (ret < 0) {
@@ -414,6 +454,10 @@
 	nf_unregister_hook(&ip_conntrack_local_out_ops);
  cleanup_inops:
 	nf_unregister_hook(&ip_conntrack_in_ops);
+ cleanup_defraglocalops:
+	nf_unregister_hook(&ip_conntrack_defrag_local_out_ops);
+ cleanup_defragops:
+	nf_unregister_hook(&ip_conntrack_defrag_ops);
  cleanup_proc:
 	proc_net_remove("ip_conntrack");
  cleanup_init:
@@ -503,5 +547,6 @@
 EXPORT_SYMBOL(ip_conntrack_expect_list);
 EXPORT_SYMBOL(ip_conntrack_lock);
 EXPORT_SYMBOL(ip_conntrack_hash);
+EXPORT_SYMBOL(ip_conntrack_untracked);
 EXPORT_SYMBOL_GPL(ip_conntrack_find_get);
 EXPORT_SYMBOL_GPL(ip_conntrack_put);
diff -Nur linux-2.4.31-orig/net/ipv4/netfilter/ip_nat_core.c linux-2.4.31-pab2/net/ipv4/netfilter/ip_nat_core.c
--- linux-2.4.31-orig/net/ipv4/netfilter/ip_nat_core.c	2005-04-04 03:42:20 +0200
+++ linux-2.4.31-pab2/net/ipv4/netfilter/ip_nat_core.c	2005-06-15 15:19:43 +0200
@@ -1024,6 +1024,10 @@
 	IP_NF_ASSERT(ip_conntrack_destroyed == NULL);
 	ip_conntrack_destroyed = &ip_nat_cleanup_conntrack;
 
+	/* Initialize fake conntrack so that NAT will skip it */
+	ip_conntrack_untracked.nat.info.initialized |=
+		(1 << IP_NAT_MANIP_SRC) | (1 << IP_NAT_MANIP_DST);
+
 	return 0;
 }
 
diff -Nur linux-2.4.31-orig/net/ipv4/netfilter/ipt_NOTRACK.c linux-2.4.31-pab2/net/ipv4/netfilter/ipt_NOTRACK.c
--- linux-2.4.31-orig/net/ipv4/netfilter/ipt_NOTRACK.c	1970-01-01 01:00:00 +0100
+++ linux-2.4.31-pab2/net/ipv4/netfilter/ipt_NOTRACK.c	2005-06-15 15:19:43 +0200
@@ -0,0 +1,75 @@
+/* This is a module which is used for setting up fake conntracks
+ * on packets so that they are not seen by the conntrack/NAT code.
+ */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+
+static unsigned int
+target(struct sk_buff **pskb,
+       unsigned int hooknum,
+       const struct net_device *in,
+       const struct net_device *out,
+       const void *targinfo,
+       void *userinfo)
+{
+	/* Previously seen (loopback)? Ignore. */
+	if ((*pskb)->nfct != NULL)
+		return IPT_CONTINUE;
+
+	/* Attach fake conntrack entry. 
+	   If there is a real ct entry correspondig to this packet, 
+	   it'll hang aroun till timing out. We don't deal with it
+	   for performance reasons. JK */
+	(*pskb)->nfct = &ip_conntrack_untracked.infos[IP_CT_NEW];
+	nf_conntrack_get((*pskb)->nfct);
+
+	return IPT_CONTINUE;
+}
+
+static int
+checkentry(const char *tablename,
+	   const struct ipt_entry *e,
+           void *targinfo,
+           unsigned int targinfosize,
+           unsigned int hook_mask)
+{
+	if (targinfosize != 0) {
+		printk(KERN_WARNING "NOTRACK: targinfosize %u != 0\n",
+		       targinfosize);
+		return 0;
+	}
+
+	if (strcmp(tablename, "raw") != 0) {
+		printk(KERN_WARNING "NOTRACK: can only be called from \"raw\" table, not \"%s\"\n", tablename);
+		return 0;
+	}
+
+	return 1;
+}
+
+static struct ipt_target ipt_notrack_reg = { 
+	.name = "NOTRACK", 
+	.target = target, 
+	.checkentry = checkentry, 
+	.me = THIS_MODULE 
+};
+
+static int __init init(void)
+{
+	if (ipt_register_target(&ipt_notrack_reg))
+		return -EINVAL;
+
+	return 0;
+}
+
+static void __exit fini(void)
+{
+	ipt_unregister_target(&ipt_notrack_reg);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff -Nur linux-2.4.31-orig/net/ipv4/netfilter/ipt_conntrack.c linux-2.4.31-pab2/net/ipv4/netfilter/ipt_conntrack.c
--- linux-2.4.31-orig/net/ipv4/netfilter/ipt_conntrack.c	2004-02-18 14:36:32 +0100
+++ linux-2.4.31-pab2/net/ipv4/netfilter/ipt_conntrack.c	2005-06-15 15:19:43 +0200
@@ -27,7 +27,9 @@
 
 #define FWINV(bool,invflg) ((bool) ^ !!(sinfo->invflags & invflg))
 
-	if (ct)
+	if (skb->nfct == &ip_conntrack_untracked.infos[IP_CT_NEW])
+		statebit = IPT_CONNTRACK_STATE_UNTRACKED;
+	else if (ct)
 		statebit = IPT_CONNTRACK_STATE_BIT(ctinfo);
 	else
 		statebit = IPT_CONNTRACK_STATE_INVALID;
diff -Nur linux-2.4.31-orig/net/ipv4/netfilter/ipt_state.c linux-2.4.31-pab2/net/ipv4/netfilter/ipt_state.c
--- linux-2.4.31-orig/net/ipv4/netfilter/ipt_state.c	2004-02-18 14:36:32 +0100
+++ linux-2.4.31-pab2/net/ipv4/netfilter/ipt_state.c	2005-06-15 15:19:43 +0200
@@ -21,7 +21,9 @@
 	enum ip_conntrack_info ctinfo;
 	unsigned int statebit;
 
-	if (!ip_conntrack_get((struct sk_buff *)skb, &ctinfo))
+	if (skb->nfct == &ip_conntrack_untracked.infos[IP_CT_NEW])
+		statebit = IPT_STATE_UNTRACKED;
+	else if (!ip_conntrack_get((struct sk_buff *)skb, &ctinfo))
 		statebit = IPT_STATE_INVALID;
 	else
 		statebit = IPT_STATE_BIT(ctinfo);
diff -Nur linux-2.4.31-orig/net/ipv4/netfilter/iptable_raw.c linux-2.4.31-pab2/net/ipv4/netfilter/iptable_raw.c
--- linux-2.4.31-orig/net/ipv4/netfilter/iptable_raw.c	1970-01-01 01:00:00 +0100
+++ linux-2.4.31-pab2/net/ipv4/netfilter/iptable_raw.c	2005-06-15 15:19:43 +0200
@@ -0,0 +1,149 @@
+/* 
+ * 'raw' table, which is the very first hooked in at PRE_ROUTING and LOCAL_OUT .
+ *
+ * Copyright (C) 2003 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
+ */
+#include <linux/module.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+
+#define RAW_VALID_HOOKS ((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_OUT))
+
+/* Standard entry. */
+struct ipt_standard
+{
+	struct ipt_entry entry;
+	struct ipt_standard_target target;
+};
+
+struct ipt_error_target
+{
+	struct ipt_entry_target target;
+	char errorname[IPT_FUNCTION_MAXNAMELEN];
+};
+
+struct ipt_error
+{
+	struct ipt_entry entry;
+	struct ipt_error_target target;
+};
+
+static struct
+{
+	struct ipt_replace repl;
+	struct ipt_standard entries[2];
+	struct ipt_error term;
+} initial_table __initdata
+= { { "raw", RAW_VALID_HOOKS, 3,
+      sizeof(struct ipt_standard) * 2 + sizeof(struct ipt_error),
+      { [NF_IP_PRE_ROUTING] 0,
+	[NF_IP_LOCAL_OUT] sizeof(struct ipt_standard) },
+      { [NF_IP_PRE_ROUTING] 0,
+	[NF_IP_LOCAL_OUT] sizeof(struct ipt_standard) },
+      0, NULL, { } },
+    {
+	    /* PRE_ROUTING */
+	    { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+		0,
+		sizeof(struct ipt_entry),
+		sizeof(struct ipt_standard),
+		0, { 0, 0 }, { } },
+	      { { { { IPT_ALIGN(sizeof(struct ipt_standard_target)), "" } }, { } },
+		-NF_ACCEPT - 1 } },
+	    /* LOCAL_OUT */
+	    { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+		0,
+		sizeof(struct ipt_entry),
+		sizeof(struct ipt_standard),
+		0, { 0, 0 }, { } },
+	      { { { { IPT_ALIGN(sizeof(struct ipt_standard_target)), "" } }, { } },
+		-NF_ACCEPT - 1 } }
+    },
+    /* ERROR */
+    { { { { 0 }, { 0 }, { 0 }, { 0 }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+	0,
+	sizeof(struct ipt_entry),
+	sizeof(struct ipt_error),
+	0, { 0, 0 }, { } },
+      { { { { IPT_ALIGN(sizeof(struct ipt_error_target)), IPT_ERROR_TARGET } },
+	  { } },
+	"ERROR"
+      }
+    }
+};
+
+static struct ipt_table packet_raw = { 
+	.name = "raw", 
+	.table = &initial_table.repl,
+	.valid_hooks =  RAW_VALID_HOOKS, 
+	.lock = RW_LOCK_UNLOCKED, 
+	.me = THIS_MODULE
+};
+
+/* The work comes in here from netfilter.c. */
+static unsigned int
+ipt_hook(unsigned int hook,
+	 struct sk_buff **pskb,
+	 const struct net_device *in,
+	 const struct net_device *out,
+	 int (*okfn)(struct sk_buff *))
+{
+	return ipt_do_table(pskb, hook, in, out, &packet_raw, NULL);
+}
+
+/* 'raw' is the very first table. */
+static struct nf_hook_ops ipt_ops[] = {
+	{
+	  .hook = ipt_hook, 
+	  .pf = PF_INET, 
+	  .hooknum = NF_IP_PRE_ROUTING, 
+	  .priority = NF_IP_PRI_RAW
+	},
+	{
+	  .hook = ipt_hook, 
+	  .pf = PF_INET, 
+	  .hooknum = NF_IP_LOCAL_OUT, 
+	  .priority = NF_IP_PRI_RAW
+	},
+};
+
+static int __init init(void)
+{
+	int ret;
+
+	/* Register table */
+	ret = ipt_register_table(&packet_raw);
+	if (ret < 0)
+		return ret;
+
+	/* Register hooks */
+	ret = nf_register_hook(&ipt_ops[0]);
+	if (ret < 0)
+		goto cleanup_table;
+
+	ret = nf_register_hook(&ipt_ops[1]);
+	if (ret < 0)
+		goto cleanup_hook0;
+
+	return ret;
+
+ cleanup_hook0:
+	nf_unregister_hook(&ipt_ops[0]);
+ cleanup_table:
+	ipt_unregister_table(&packet_raw);
+
+	return ret;
+}
+
+static void __exit fini(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < sizeof(ipt_ops)/sizeof(struct nf_hook_ops); i++)
+		nf_unregister_hook(&ipt_ops[i]);
+
+	ipt_unregister_table(&packet_raw);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff -Nur linux-2.4.31-orig/net/ipv6/netfilter/Config.in linux-2.4.31-pab2/net/ipv6/netfilter/Config.in
--- linux-2.4.31-orig/net/ipv6/netfilter/Config.in	2003-06-13 16:51:39 +0200
+++ linux-2.4.31-pab2/net/ipv6/netfilter/Config.in	2005-06-15 15:19:43 +0200
@@ -75,4 +75,9 @@
   #dep_tristate '  LOG target support' CONFIG_IP6_NF_TARGET_LOG $CONFIG_IP6_NF_IPTABLES
 fi
 
+  if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+    tristate '  raw table support (required for TRACE)' CONFIG_IP6_NF_RAW $CONFIG_IP6_NF_IPTABLES
+  fi
+  # Marker for TRACE target
+
 endmenu
diff -Nur linux-2.4.31-orig/net/ipv6/netfilter/Makefile linux-2.4.31-pab2/net/ipv6/netfilter/Makefile
--- linux-2.4.31-orig/net/ipv6/netfilter/Makefile	2003-06-13 16:51:39 +0200
+++ linux-2.4.31-pab2/net/ipv6/netfilter/Makefile	2005-06-15 15:19:43 +0200
@@ -30,6 +30,7 @@
 obj-$(CONFIG_IP6_NF_TARGET_MARK) += ip6t_MARK.o
 obj-$(CONFIG_IP6_NF_QUEUE) += ip6_queue.o
 obj-$(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
 
 include $(TOPDIR)/Rules.make
diff -Nur linux-2.4.31-orig/net/ipv6/netfilter/ip6table_raw.c linux-2.4.31-pab2/net/ipv6/netfilter/ip6table_raw.c
--- linux-2.4.31-orig/net/ipv6/netfilter/ip6table_raw.c	1970-01-01 01:00:00 +0100
+++ linux-2.4.31-pab2/net/ipv6/netfilter/ip6table_raw.c	2005-06-15 15:19:43 +0200
@@ -0,0 +1,154 @@
+/*
+ * IPv6 raw table, a port of the IPv4 raw table to IPv6
+ *
+ * Copyright (C) 2003 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
+ */
+#include <linux/module.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+
+#define RAW_VALID_HOOKS ((1 << NF_IP6_PRE_ROUTING) | (1 << NF_IP6_LOCAL_OUT))
+
+#if 0
+#define DEBUGP(x, args...)	printk(KERN_DEBUG x, ## args)
+#else
+#define DEBUGP(x, args...)
+#endif
+
+/* Standard entry. */
+struct ip6t_standard
+{
+	struct ip6t_entry entry;
+	struct ip6t_standard_target target;
+};
+
+struct ip6t_error_target
+{
+	struct ip6t_entry_target target;
+	char errorname[IP6T_FUNCTION_MAXNAMELEN];
+};
+
+struct ip6t_error
+{
+	struct ip6t_entry entry;
+	struct ip6t_error_target target;
+};
+
+static struct
+{
+	struct ip6t_replace repl;
+	struct ip6t_standard entries[2];
+	struct ip6t_error term;
+} initial_table __initdata 
+= { { "raw", RAW_VALID_HOOKS, 3,
+      sizeof(struct ip6t_standard) * 2 + sizeof(struct ip6t_error),
+      { [NF_IP6_PRE_ROUTING] 	0,
+	[NF_IP6_LOCAL_OUT]	sizeof(struct ip6t_standard) },
+      { [NF_IP6_PRE_ROUTING] 	0,
+	[NF_IP6_LOCAL_OUT]	sizeof(struct ip6t_standard) },
+      0, NULL, { } },
+    {
+	    /* PRE_ROUTING */
+            { { { { { { 0 } } }, { { { 0 } } }, { { { 0 } } }, { { { 0 } } }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+		0,
+		sizeof(struct ip6t_entry),
+		sizeof(struct ip6t_standard),
+		0, { 0, 0 }, { } },
+	      { { { { IP6T_ALIGN(sizeof(struct ip6t_standard_target)), "" } }, { } },
+		-NF_ACCEPT - 1 } },
+	    /* LOCAL_OUT */
+            { { { { { { 0 } } }, { { { 0 } } }, { { { 0 } } }, { { { 0 } } }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+		0,
+		sizeof(struct ip6t_entry),
+		sizeof(struct ip6t_standard),
+		0, { 0, 0 }, { } },
+	      { { { { IP6T_ALIGN(sizeof(struct ip6t_standard_target)), "" } }, { } },
+		-NF_ACCEPT - 1 } },
+    },
+    /* ERROR */
+    { { { { { { 0 } } }, { { { 0 } } }, { { { 0 } } }, { { { 0 } } }, "", "", { 0 }, { 0 }, 0, 0, 0 },
+	0,
+	sizeof(struct ip6t_entry),
+	sizeof(struct ip6t_error),
+	0, { 0, 0 }, { } },
+      { { { { IP6T_ALIGN(sizeof(struct ip6t_error_target)), IP6T_ERROR_TARGET } },
+	  { } },
+	"ERROR"
+      }
+    }
+};
+
+static struct ip6t_table packet_raw = { 
+	.name = "raw", 
+	.table = &initial_table.repl,
+	.valid_hooks = RAW_VALID_HOOKS, 
+	.lock = RW_LOCK_UNLOCKED, 
+	.me = THIS_MODULE
+};
+
+/* The work comes in here from netfilter.c. */
+static unsigned int
+ip6t_hook(unsigned int hook,
+	 struct sk_buff **pskb,
+	 const struct net_device *in,
+	 const struct net_device *out,
+	 int (*okfn)(struct sk_buff *))
+{
+	return ip6t_do_table(pskb, hook, in, out, &packet_raw, NULL);
+}
+
+static struct nf_hook_ops ip6t_ops[] = { 
+	{
+	  .hook = ip6t_hook, 
+	  .pf = PF_INET6,
+	  .hooknum = NF_IP6_PRE_ROUTING,
+	  .priority = NF_IP6_PRI_FIRST
+	},
+	{
+	  .hook = ip6t_hook, 
+	  .pf = PF_INET6, 
+	  .hooknum = NF_IP6_LOCAL_OUT,
+	  .priority = NF_IP6_PRI_FIRST
+	},
+};
+
+static int __init init(void)
+{
+	int ret;
+
+	/* Register table */
+	ret = ip6t_register_table(&packet_raw);
+	if (ret < 0)
+		return ret;
+
+	/* Register hooks */
+	ret = nf_register_hook(&ip6t_ops[0]);
+	if (ret < 0)
+		goto cleanup_table;
+
+	ret = nf_register_hook(&ip6t_ops[1]);
+	if (ret < 0)
+		goto cleanup_hook0;
+
+	return ret;
+
+ cleanup_hook0:
+	nf_unregister_hook(&ip6t_ops[0]);
+ cleanup_table:
+	ip6t_unregister_table(&packet_raw);
+
+	return ret;
+}
+
+static void __exit fini(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < sizeof(ip6t_ops)/sizeof(struct nf_hook_ops); i++)
+		nf_unregister_hook(&ip6t_ops[i]);
+
+	ip6t_unregister_table(&packet_raw);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");