2007-10-08 Stefan Siegl <stesie@brokenpipe.de>

	Import a number of files from Linux 2.2.14.  Renamed some of them,
	to have unique filenames as required by the make system.

	* linux-src/net/ipv6/addrconf.c: Import file.
	* linux-src/net/ipv6/af_inet6.c: Likewise.
	* linux-src/net/ipv6/exthdrs.c: Likewise.
	* linux-src/net/ipv6/ip6_fib.c: Likewise.
	* linux-src/net/ipv6/ip6_flowlabel.c: Likewise.
	* linux-src/net/ipv6/ip6_input.c: Likewise.
	* linux-src/net/ipv6/ip6_output.c: Likewise.
	* linux-src/net/ipv6/ipv6_sockglue.c: Likewise.
	* linux-src/net/ipv6/mcast.c: Likewise.
	* linux-src/net/ipv6/ndisc.c: Likewise.
	* linux-src/net/ipv6/reassembly.c: Likewise.
	* linux-src/net/ipv6/tcp_ipv6.c: Likewise.
	* linux-src/net/ipv6/datagram_ipv6.c: Import file (was datagram.c).
	* linux-src/net/ipv6/icmpv6.c: Import file (was icmp.c).
	* linux-src/net/ipv6/protocol_ipv6.c: Import file (was protocol.c).
	* linux-src/net/ipv6/raw_ipv6.c: Import file (was raw.c).
	* linux-src/net/ipv6/route_ipv6.c: Import file (was route.c).
	* linux-src/net/ipv6/udp_ipv6.c: Import file (was udp.c).

1 files changed, 673 insertions, 0 deletions

diff --git a/pfinet/linux-src/net/ipv6/icmpv6.c b/pfinet/linux-src/net/ipv6/icmpv6.c
new file mode 100644
index 00000000..de5e7780
--- /dev/null
+++ b/pfinet/linux-src/net/ipv6/icmpv6.c
@@ -0,0 +1,673 @@
+/*
+ *	Internet Control Message Protocol (ICMPv6)
+ *	Linux INET6 implementation
+ *
+ *	Authors:
+ *	Pedro Roque		<roque@di.fc.ul.pt>
+ *
+ *	$Id: icmpv6.c,v 1.1 2007/10/08 21:12:30 stesie Exp $
+ *
+ *	Based on net/ipv4/icmp.c
+ *
+ *	RFC 1885
+ *
+ *	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.
+ */
+
+/*
+ *	Changes:
+ *
+ *	Andi Kleen		:	exception handling
+ *	Andi Kleen			add rate limits. never reply to a icmp.
+ *					add more length checks and other fixes.
+ */
+
+#define __NO_VERSION__
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/icmpv6.h>
+
+#include <net/ip.h>
+#include <net/sock.h>
+
+#include <net/ipv6.h>
+#include <net/checksum.h>
+#include <net/protocol.h>
+#include <net/raw.h>
+#include <net/rawv6.h>
+#include <net/transp_v6.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+#include <net/icmp.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+struct icmpv6_mib icmpv6_statistics;
+
+/*
+ *	ICMP socket for flow control.
+ */
+
+struct socket *icmpv6_socket;
+
+int icmpv6_rcv(struct sk_buff *skb, unsigned long len);
+
+static struct inet6_protocol icmpv6_protocol = 
+{
+	icmpv6_rcv,		/* handler		*/
+	NULL,			/* error control	*/
+	NULL,			/* next			*/
+	IPPROTO_ICMPV6,		/* protocol ID		*/
+	0,			/* copy			*/
+	NULL,			/* data			*/
+	"ICMPv6"	       	/* name			*/
+};
+
+struct icmpv6_msg {
+	struct icmp6hdr		icmph;
+	__u8 			*data;
+	struct in6_addr		*daddr;
+	int			len;
+	__u32			csum;
+};
+
+
+
+/*
+ *	getfrag callback
+ */
+
+static int icmpv6_getfrag(const void *data, struct in6_addr *saddr, 
+			   char *buff, unsigned int offset, unsigned int len)
+{
+	struct icmpv6_msg *msg = (struct icmpv6_msg *) data;
+	struct icmp6hdr *icmph;
+	__u32 csum;
+
+	/* 
+	 *	in theory offset must be 0 since we never send more 
+	 *	than IPV6_MIN_MTU bytes on an error or more than the path mtu
+	 *	on an echo reply. (those are the rules on RFC 1883)
+	 *
+	 * 	Luckily, this statement is obsolete after
+	 *	draft-ietf-ipngwg-icmp-v2-00           --ANK (980730)
+	 */
+
+	if (offset) {
+		csum = csum_partial_copy((void *) msg->data +
+					 offset - sizeof(struct icmp6hdr), 
+					 buff, len, msg->csum);
+		msg->csum = csum;
+		return 0;
+	}
+
+	csum = csum_partial_copy((void *) &msg->icmph, buff,
+				 sizeof(struct icmp6hdr), msg->csum);
+
+	csum = csum_partial_copy((void *) msg->data, 
+				 buff + sizeof(struct icmp6hdr),
+				 len - sizeof(struct icmp6hdr), csum);
+
+	icmph = (struct icmp6hdr *) buff;
+
+	icmph->icmp6_cksum = csum_ipv6_magic(saddr, msg->daddr, msg->len,
+					     IPPROTO_ICMPV6, csum);
+	return 0; 
+}
+
+
+/* 
+ * Slightly more convenient version of icmpv6_send.
+ */
+void icmpv6_param_prob(struct sk_buff *skb, int code, void *pos)
+{
+	int offset = (u8*)pos - (u8*)skb->nh.ipv6h; 
+	
+	icmpv6_send(skb, ICMPV6_PARAMPROB, code, offset, skb->dev);
+	kfree_skb(skb);
+}
+
+/*
+ * Figure out, may we reply to this packet with icmp error.
+ *
+ * We do not reply, if:
+ *	- it was icmp error message.
+ *	- it is truncated, so that it is known, that protocol is ICMPV6
+ *	  (i.e. in the middle of some exthdr)
+ *	- it is not the first fragment. BTW IPv6 specs say nothing about
+ *	  this case, but it is clear, that our reply would be useless
+ *	  for sender.
+ *
+ *	--ANK (980726)
+ */
+
+static int is_ineligible(struct ipv6hdr *hdr, int len)
+{
+	u8 *ptr;
+	__u8 nexthdr = hdr->nexthdr;
+
+	if (len < (int)sizeof(*hdr))
+		return 1;
+
+	ptr = ipv6_skip_exthdr((struct ipv6_opt_hdr *)(hdr+1), &nexthdr, len - sizeof(*hdr));
+	if (!ptr)
+		return 0;
+	if (nexthdr == IPPROTO_ICMPV6) {
+		struct icmp6hdr *ihdr =	(struct icmp6hdr *)ptr;
+		return (ptr - (u8*)hdr) > len || !(ihdr->icmp6_type & 0x80); 
+	}
+	return nexthdr == NEXTHDR_FRAGMENT;
+}
+
+int sysctl_icmpv6_time = 1*HZ; 
+
+/* 
+ * Check the ICMP output rate limit 
+ */
+static inline int icmpv6_xrlim_allow(struct sock *sk, int type,
+				     struct flowi *fl)
+{
+	struct dst_entry *dst;
+	int res = 0;
+
+	/* Informational messages are not limited. */
+	if (type & 0x80)
+		return 1;
+
+	/* Do not limit pmtu discovery, it would break it. */
+	if (type == ICMPV6_PKT_TOOBIG)
+		return 1;
+
+	/* 
+	 * Look up the output route.
+	 * XXX: perhaps the expire for routing entries cloned by
+	 * this lookup should be more aggressive (not longer than timeout).
+	 */
+	dst = ip6_route_output(sk, fl);
+	if (dst->error) {
+		ipv6_statistics.Ip6OutNoRoutes++;
+	} else if (dst->dev && (dst->dev->flags&IFF_LOOPBACK)) {
+		res = 1;
+	} else {
+		struct rt6_info *rt = (struct rt6_info *)dst;
+		int tmo = sysctl_icmpv6_time;
+
+		/* Give more bandwidth to wider prefixes. */
+		if (rt->rt6i_dst.plen < 128)
+			tmo >>= ((128 - rt->rt6i_dst.plen)>>5);
+
+		res = xrlim_allow(dst, tmo);
+	}
+	dst_release(dst);
+	return res;
+}
+
+/*
+ *	an inline helper for the "simple" if statement below
+ *	checks if parameter problem report is caused by an
+ *	unrecognized IPv6 option that has the Option Type 
+ *	highest-order two bits set to 10
+ */
+
+static __inline__ int opt_unrec(struct sk_buff *skb, __u32 offset)
+{
+	u8 *buff = skb->nh.raw;
+
+	return ( ( *(buff + offset) & 0xC0 ) == 0x80 );
+}
+
+/*
+ *	Send an ICMP message in response to a packet in error
+ */
+
+void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info, 
+		 struct device *dev)
+{
+	struct ipv6hdr *hdr = skb->nh.ipv6h;
+	struct sock *sk = icmpv6_socket->sk;
+	struct in6_addr *saddr = NULL;
+	int iif = 0;
+	struct icmpv6_msg msg;
+	struct flowi fl;
+	int addr_type = 0;
+	int len;
+
+	/*
+	 *	sanity check pointer in case of parameter problem
+	 */
+
+	if (type == ICMPV6_PARAMPROB && 
+	    (info > (skb->tail - ((unsigned char *) hdr)))) {
+		printk(KERN_DEBUG "icmpv6_send: bug! pointer > skb\n");
+		return;
+	}
+
+	/*
+	 *	Make sure we respect the rules 
+	 *	i.e. RFC 1885 2.4(e)
+	 *	Rule (e.1) is enforced by not using icmpv6_send
+	 *	in any code that processes icmp errors.
+	 */
+	
+	addr_type = ipv6_addr_type(&hdr->daddr);
+
+	if (ipv6_chk_addr(&hdr->daddr, skb->dev, 0))
+		saddr = &hdr->daddr;
+
+	/*
+	 *	Dest addr check
+	 */
+
+	if ((addr_type & IPV6_ADDR_MULTICAST || skb->pkt_type != PACKET_HOST)) {
+		if (type != ICMPV6_PKT_TOOBIG &&
+		    !(type == ICMPV6_PARAMPROB && 
+		      code == ICMPV6_UNK_OPTION && 
+		      (opt_unrec(skb, info))))
+			return;
+
+		saddr = NULL;
+	}
+
+	addr_type = ipv6_addr_type(&hdr->saddr);
+
+	/*
+	 *	Source addr check
+	 */
+
+	if (addr_type & IPV6_ADDR_LINKLOCAL)
+		iif = skb->dev->ifindex;
+
+	/*
+	 *	Must not send if we know that source is Anycast also.
+	 *	for now we don't know that.
+	 */
+	if ((addr_type == IPV6_ADDR_ANY) || (addr_type & IPV6_ADDR_MULTICAST)) {
+		printk(KERN_DEBUG "icmpv6_send: addr_any/mcast source\n");
+		return;
+	}
+
+	/* 
+	 *	Never answer to a ICMP packet.
+	 */
+	if (is_ineligible(hdr, (u8*)skb->tail - (u8*)hdr)) {
+		if (net_ratelimit())
+			printk(KERN_DEBUG "icmpv6_send: no reply to icmp error/fragment\n"); 
+		return;
+	}
+
+	fl.proto = IPPROTO_ICMPV6;
+	fl.nl_u.ip6_u.daddr = &hdr->saddr;
+	fl.nl_u.ip6_u.saddr = saddr;
+	fl.oif = iif;
+	fl.fl6_flowlabel = 0;
+	fl.uli_u.icmpt.type = type;
+	fl.uli_u.icmpt.code = code;
+
+	if (!icmpv6_xrlim_allow(sk, type, &fl)) 
+		return; 
+
+	/*
+	 *	ok. kick it. checksum will be provided by the 
+	 *	getfrag_t callback.
+	 */
+
+	msg.icmph.icmp6_type = type;
+	msg.icmph.icmp6_code = code;
+	msg.icmph.icmp6_cksum = 0;
+	msg.icmph.icmp6_pointer = htonl(info);
+
+	msg.data = skb->nh.raw;
+	msg.csum = 0;
+	msg.daddr = &hdr->saddr;
+
+	len = min((skb->tail - ((unsigned char *) hdr)) + sizeof(struct icmp6hdr), 
+		  IPV6_MIN_MTU - sizeof(struct ipv6hdr));
+
+	if (len < 0) {
+		printk(KERN_DEBUG "icmp: len problem\n");
+		return;
+	}
+
+	msg.len = len;
+
+	ip6_build_xmit(sk, icmpv6_getfrag, &msg, &fl, len, NULL, -1,
+		       MSG_DONTWAIT);
+	if (type >= ICMPV6_DEST_UNREACH && type <= ICMPV6_PARAMPROB)
+		(&icmpv6_statistics.Icmp6OutDestUnreachs)[type-1]++;
+	icmpv6_statistics.Icmp6OutMsgs++;
+}
+
+static void icmpv6_echo_reply(struct sk_buff *skb)
+{
+	struct sock *sk = icmpv6_socket->sk;
+	struct ipv6hdr *hdr = skb->nh.ipv6h;
+	struct icmp6hdr *icmph = (struct icmp6hdr *) skb->h.raw;
+	struct in6_addr *saddr;
+	struct icmpv6_msg msg;
+	struct flowi fl;
+	unsigned char *data;
+	int len;
+
+	data = (char *) (icmph + 1);
+
+	saddr = &hdr->daddr;
+
+	if (ipv6_addr_type(saddr) & IPV6_ADDR_MULTICAST)
+		saddr = NULL;
+
+	len = skb->tail - data;
+	len += sizeof(struct icmp6hdr);
+
+	msg.icmph.icmp6_type = ICMPV6_ECHO_REPLY;
+	msg.icmph.icmp6_code = 0;
+	msg.icmph.icmp6_cksum = 0;
+	msg.icmph.icmp6_identifier = icmph->icmp6_identifier;
+	msg.icmph.icmp6_sequence = icmph->icmp6_sequence;
+
+	msg.data = data;
+	msg.csum = 0;
+	msg.len = len;
+	msg.daddr = &hdr->saddr;
+
+	fl.proto = IPPROTO_ICMPV6;
+	fl.nl_u.ip6_u.daddr = &hdr->saddr;
+	fl.nl_u.ip6_u.saddr = saddr;
+	fl.oif = skb->dev->ifindex;
+	fl.fl6_flowlabel = 0;
+	fl.uli_u.icmpt.type = ICMPV6_ECHO_REPLY;
+	fl.uli_u.icmpt.code = 0;
+
+	ip6_build_xmit(sk, icmpv6_getfrag, &msg, &fl, len, NULL, -1,
+		       MSG_DONTWAIT);
+	icmpv6_statistics.Icmp6OutEchoReplies++;
+	icmpv6_statistics.Icmp6OutMsgs++;
+}
+
+static void icmpv6_notify(struct sk_buff *skb,
+			  int type, int code, u32 info, unsigned char *buff, int len)
+{
+	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
+	struct in6_addr *daddr = &skb->nh.ipv6h->daddr;
+	struct ipv6hdr *hdr = (struct ipv6hdr *) buff;
+	struct inet6_protocol *ipprot;
+	struct sock *sk;
+	u8 *pb;
+	int hash;
+	u8 nexthdr;
+
+	nexthdr = hdr->nexthdr;
+
+	len -= sizeof(struct ipv6hdr);
+	if (len < 0)
+		return;
+
+	/* now skip over extension headers */
+	pb = ipv6_skip_exthdr((struct ipv6_opt_hdr *) (hdr + 1), &nexthdr, len);
+	if (!pb)
+		return;
+
+	/* BUGGG_FUTURE: we should try to parse exthdrs in this packet.
+	   Without this we will not able f.e. to make source routed
+	   pmtu discovery.
+	   Corresponding argument (opt) to notifiers is already added.
+	   --ANK (980726)
+	 */
+
+	hash = nexthdr & (MAX_INET_PROTOS - 1);
+
+	for (ipprot = (struct inet6_protocol *) inet6_protos[hash]; 
+	     ipprot != NULL; 
+	     ipprot=(struct inet6_protocol *)ipprot->next) {
+		if (ipprot->protocol != nexthdr)
+			continue;
+
+		if (ipprot->err_handler)
+			ipprot->err_handler(skb, hdr, NULL, type, code, pb, info);
+	}
+
+	sk = raw_v6_htable[hash];
+
+	if (sk == NULL)
+		return;
+
+	while((sk = raw_v6_lookup(sk, nexthdr, daddr, saddr))) {
+		rawv6_err(sk, skb, hdr, NULL, type, code, pb, info);
+		sk = sk->next;
+	}
+}
+  
+/*
+ *	Handle icmp messages
+ */
+
+int icmpv6_rcv(struct sk_buff *skb, unsigned long len)
+{
+	struct device *dev = skb->dev;
+	struct in6_addr *saddr = &skb->nh.ipv6h->saddr;
+	struct in6_addr *daddr = &skb->nh.ipv6h->daddr;
+	struct ipv6hdr *orig_hdr;
+	struct icmp6hdr *hdr = (struct icmp6hdr *) skb->h.raw;
+	int ulen;
+	int type;
+
+	icmpv6_statistics.Icmp6InMsgs++;
+
+	if (len < sizeof(struct icmp6hdr))
+		goto discard_it;
+
+	/* Perform checksum. */
+	switch (skb->ip_summed) {	
+	case CHECKSUM_NONE:
+		skb->csum = csum_partial((char *)hdr, len, 0);
+	case CHECKSUM_HW:
+		if (csum_ipv6_magic(saddr, daddr, len, IPPROTO_ICMPV6, 
+				    skb->csum)) {
+			printk(KERN_DEBUG "ICMPv6 checksum failed [%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x > %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x]\n",
+				ntohs(saddr->in6_u.u6_addr16[0]),
+				ntohs(saddr->in6_u.u6_addr16[1]),
+				ntohs(saddr->in6_u.u6_addr16[2]),
+				ntohs(saddr->in6_u.u6_addr16[3]),
+				ntohs(saddr->in6_u.u6_addr16[4]),
+				ntohs(saddr->in6_u.u6_addr16[5]),
+				ntohs(saddr->in6_u.u6_addr16[6]),
+				ntohs(saddr->in6_u.u6_addr16[7]),
+				ntohs(daddr->in6_u.u6_addr16[0]),
+				ntohs(daddr->in6_u.u6_addr16[1]),
+				ntohs(daddr->in6_u.u6_addr16[2]),
+				ntohs(daddr->in6_u.u6_addr16[3]),
+				ntohs(daddr->in6_u.u6_addr16[4]),
+				ntohs(daddr->in6_u.u6_addr16[5]),
+				ntohs(daddr->in6_u.u6_addr16[6]),
+				ntohs(daddr->in6_u.u6_addr16[7]));
+			goto discard_it;
+		}
+	default:
+		/* CHECKSUM_UNNECESSARY */
+	};
+
+	/*
+	 *	length of original packet carried in skb
+	 */
+	ulen = skb->tail - (unsigned char *) (hdr + 1);
+
+	type = hdr->icmp6_type;
+
+	if (type >= ICMPV6_DEST_UNREACH && type <= ICMPV6_PARAMPROB)
+		(&icmpv6_statistics.Icmp6InDestUnreachs)[type-ICMPV6_DEST_UNREACH]++;
+	else if (type >= ICMPV6_ECHO_REQUEST && type <= NDISC_REDIRECT)
+		(&icmpv6_statistics.Icmp6InEchos)[type-ICMPV6_ECHO_REQUEST]++;
+
+	switch (type) {
+
+	case ICMPV6_ECHO_REQUEST:
+		icmpv6_echo_reply(skb);
+		break;
+
+	case ICMPV6_ECHO_REPLY:
+		/* we coulnd't care less */
+		break;
+
+	case ICMPV6_PKT_TOOBIG:
+		/* BUGGG_FUTURE: if packet contains rthdr, we cannot update
+		   standard destination cache. Seems, only "advanced"
+		   destination cache will allow to solve this problem
+		   --ANK (980726)
+		 */
+		orig_hdr = (struct ipv6hdr *) (hdr + 1);
+		if (ulen >= sizeof(struct ipv6hdr))
+			rt6_pmtu_discovery(&orig_hdr->daddr, &orig_hdr->saddr, dev,
+					   ntohl(hdr->icmp6_mtu));
+
+		/*
+		 *	Drop through to notify
+		 */
+
+	case ICMPV6_DEST_UNREACH:
+	case ICMPV6_TIME_EXCEED:
+	case ICMPV6_PARAMPROB:
+		icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu,
+			      (char *) (hdr + 1), ulen);
+		break;
+
+	case NDISC_ROUTER_SOLICITATION:
+	case NDISC_ROUTER_ADVERTISEMENT:
+	case NDISC_NEIGHBOUR_SOLICITATION:
+	case NDISC_NEIGHBOUR_ADVERTISEMENT:
+	case NDISC_REDIRECT:
+		ndisc_rcv(skb, len);
+		break;
+
+	case ICMPV6_MGM_QUERY:
+		igmp6_event_query(skb, hdr, len);
+		break;
+
+	case ICMPV6_MGM_REPORT:
+		igmp6_event_report(skb, hdr, len);
+		break;
+
+	case ICMPV6_MGM_REDUCTION:
+		break;
+
+	default:
+		if (net_ratelimit())
+			printk(KERN_DEBUG "icmpv6: msg of unkown type\n");
+		
+		/* informational */
+		if (type & 0x80)
+			break;
+
+		/* 
+		 * error of unkown type. 
+		 * must pass to upper level 
+		 */
+
+		icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu,
+			      (char *) (hdr + 1), ulen);
+	};
+	kfree_skb(skb);
+	return 0;
+
+discard_it:
+	icmpv6_statistics.Icmp6InErrors++;
+	kfree_skb(skb);
+	return 0;
+}
+
+int __init icmpv6_init(struct net_proto_family *ops)
+{
+	struct sock *sk;
+	int err;
+
+	icmpv6_socket = sock_alloc();
+	if (icmpv6_socket == NULL) {
+		printk(KERN_ERR
+		       "Failed to create the ICMP6 control socket.\n");
+		return -1;
+	}
+	icmpv6_socket->inode->i_uid = 0;
+	icmpv6_socket->inode->i_gid = 0;
+	icmpv6_socket->type = SOCK_RAW;
+
+	if ((err = ops->create(icmpv6_socket, IPPROTO_ICMPV6)) < 0) {
+		printk(KERN_ERR
+		       "Failed to initialize the ICMP6 control socket (err %d).\n",
+		       err);
+		sock_release(icmpv6_socket);
+		icmpv6_socket = NULL; /* for safety */
+		return err;
+	}
+
+	sk = icmpv6_socket->sk;
+	sk->allocation = GFP_ATOMIC;
+	sk->num = 256;			/* Don't receive any data */
+
+	inet6_add_protocol(&icmpv6_protocol);
+
+	return 0;
+}
+
+void icmpv6_cleanup(void)
+{
+	sock_release(icmpv6_socket);
+	icmpv6_socket = NULL; /* For safety. */
+	inet6_del_protocol(&icmpv6_protocol);
+}
+
+static struct icmp6_err {
+	int err;
+	int fatal;
+} tab_unreach[] = {
+	{ ENETUNREACH,	0},	/* NOROUTE		*/
+	{ EACCES,	1},	/* ADM_PROHIBITED	*/
+	{ EHOSTUNREACH,	0},	/* Was NOT_NEIGHBOUR, now reserved */
+	{ EHOSTUNREACH,	0},	/* ADDR_UNREACH		*/
+	{ ECONNREFUSED,	1},	/* PORT_UNREACH		*/
+};
+
+int icmpv6_err_convert(int type, int code, int *err)
+{
+	int fatal = 0;
+
+	*err = EPROTO;
+
+	switch (type) {
+	case ICMPV6_DEST_UNREACH:
+		fatal = 1;
+		if (code <= ICMPV6_PORT_UNREACH) {
+			*err  = tab_unreach[code].err;
+			fatal = tab_unreach[code].fatal;
+		}
+		break;
+
+	case ICMPV6_PKT_TOOBIG:
+		*err = EMSGSIZE;
+		break;
+		
+	case ICMPV6_PARAMPROB:
+		*err = EPROTO;
+		fatal = 1;
+		break;
+
+	case ICMPV6_TIME_EXCEED:
+		*err = EHOSTUNREACH;
+		break;
+	};
+
+	return fatal;
+}