1 files changed, 867 insertions, 0 deletions

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
new file mode 100644
index 000000000000..768b11703daf
--- /dev/null
+++ b/net/ipv6/af_inet6.c
@@ -0,0 +1,867 @@
+/*
+ *	PF_INET6 socket protocol family
+ *	Linux INET6 implementation 
+ *
+ *	Authors:
+ *	Pedro Roque		<roque@di.fc.ul.pt>	
+ *
+ *	Adapted from linux/net/ipv4/af_inet.c
+ *
+ *	$Id: af_inet6.c,v 1.66 2002/02/01 22:01:04 davem Exp $
+ *
+ * 	Fixes:
+ *	piggy, Karl Knutson	:	Socket protocol table
+ * 	Hideaki YOSHIFUJI	:	sin6_scope_id support
+ * 	Arnaldo Melo		: 	check proc_net_create return, cleanups
+ *
+ *	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/module.h>
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/icmpv6.h>
+#include <linux/smp_lock.h>
+
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/udp.h>
+#include <net/tcp.h>
+#include <net/ipip.h>
+#include <net/protocol.h>
+#include <net/inet_common.h>
+#include <net/transp_v6.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+#ifdef CONFIG_IPV6_TUNNEL
+#include <net/ip6_tunnel.h>
+#endif
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+MODULE_AUTHOR("Cast of dozens");
+MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
+MODULE_LICENSE("GPL");
+
+/* IPv6 procfs goodies... */
+
+#ifdef CONFIG_PROC_FS
+extern int raw6_proc_init(void);
+extern void raw6_proc_exit(void);
+extern int tcp6_proc_init(void);
+extern void tcp6_proc_exit(void);
+extern int udp6_proc_init(void);
+extern void udp6_proc_exit(void);
+extern int ipv6_misc_proc_init(void);
+extern void ipv6_misc_proc_exit(void);
+extern int ac6_proc_init(void);
+extern void ac6_proc_exit(void);
+extern int if6_proc_init(void);
+extern void if6_proc_exit(void);
+#endif
+
+int sysctl_ipv6_bindv6only;
+
+#ifdef INET_REFCNT_DEBUG
+atomic_t inet6_sock_nr;
+#endif
+
+/* The inetsw table contains everything that inet_create needs to
+ * build a new socket.
+ */
+static struct list_head inetsw6[SOCK_MAX];
+static DEFINE_SPINLOCK(inetsw6_lock);
+
+static void inet6_sock_destruct(struct sock *sk)
+{
+	inet_sock_destruct(sk);
+
+#ifdef INET_REFCNT_DEBUG
+	atomic_dec(&inet6_sock_nr);
+#endif
+}
+
+static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
+{
+	const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
+
+	return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
+}
+
+static int inet6_create(struct socket *sock, int protocol)
+{
+	struct inet_sock *inet;
+	struct ipv6_pinfo *np;
+	struct sock *sk;
+	struct list_head *p;
+	struct inet_protosw *answer;
+	struct proto *answer_prot;
+	unsigned char answer_flags;
+	char answer_no_check;
+	int rc;
+
+	/* Look for the requested type/protocol pair. */
+	answer = NULL;
+	rcu_read_lock();
+	list_for_each_rcu(p, &inetsw6[sock->type]) {
+		answer = list_entry(p, struct inet_protosw, list);
+
+		/* Check the non-wild match. */
+		if (protocol == answer->protocol) {
+			if (protocol != IPPROTO_IP)
+				break;
+		} else {
+			/* Check for the two wild cases. */
+			if (IPPROTO_IP == protocol) {
+				protocol = answer->protocol;
+				break;
+			}
+			if (IPPROTO_IP == answer->protocol)
+				break;
+		}
+		answer = NULL;
+	}
+
+	rc = -ESOCKTNOSUPPORT;
+	if (!answer)
+		goto out_rcu_unlock;
+	rc = -EPERM;
+	if (answer->capability > 0 && !capable(answer->capability))
+		goto out_rcu_unlock;
+	rc = -EPROTONOSUPPORT;
+	if (!protocol)
+		goto out_rcu_unlock;
+
+	sock->ops = answer->ops;
+
+	answer_prot = answer->prot;
+	answer_no_check = answer->no_check;
+	answer_flags = answer->flags;
+	rcu_read_unlock();
+
+	BUG_TRAP(answer_prot->slab != NULL);
+
+	rc = -ENOBUFS;
+	sk = sk_alloc(PF_INET6, GFP_KERNEL, answer_prot, 1);
+	if (sk == NULL)
+		goto out;
+
+	sock_init_data(sock, sk);
+
+	rc = 0;
+	sk->sk_no_check = answer_no_check;
+	if (INET_PROTOSW_REUSE & answer_flags)
+		sk->sk_reuse = 1;
+
+	inet = inet_sk(sk);
+
+	if (SOCK_RAW == sock->type) {
+		inet->num = protocol;
+		if (IPPROTO_RAW == protocol)
+			inet->hdrincl = 1;
+	}
+
+	sk->sk_destruct		= inet6_sock_destruct;
+	sk->sk_family		= PF_INET6;
+	sk->sk_protocol		= protocol;
+
+	sk->sk_backlog_rcv	= answer->prot->backlog_rcv;
+
+	inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
+	np->hop_limit	= -1;
+	np->mcast_hops	= -1;
+	np->mc_loop	= 1;
+	np->pmtudisc	= IPV6_PMTUDISC_WANT;
+	np->ipv6only	= sysctl_ipv6_bindv6only;
+	
+	/* Init the ipv4 part of the socket since we can have sockets
+	 * using v6 API for ipv4.
+	 */
+	inet->uc_ttl	= -1;
+
+	inet->mc_loop	= 1;
+	inet->mc_ttl	= 1;
+	inet->mc_index	= 0;
+	inet->mc_list	= NULL;
+
+	if (ipv4_config.no_pmtu_disc)
+		inet->pmtudisc = IP_PMTUDISC_DONT;
+	else
+		inet->pmtudisc = IP_PMTUDISC_WANT;
+
+
+#ifdef INET_REFCNT_DEBUG
+	atomic_inc(&inet6_sock_nr);
+	atomic_inc(&inet_sock_nr);
+#endif
+	if (inet->num) {
+		/* It assumes that any protocol which allows
+		 * the user to assign a number at socket
+		 * creation time automatically shares.
+		 */
+		inet->sport = ntohs(inet->num);
+		sk->sk_prot->hash(sk);
+	}
+	if (sk->sk_prot->init) {
+		rc = sk->sk_prot->init(sk);
+		if (rc) {
+			sk_common_release(sk);
+			goto out;
+		}
+	}
+out:
+	return rc;
+out_rcu_unlock:
+	rcu_read_unlock();
+	goto out;
+}
+
+
+/* bind for INET6 API */
+int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+{
+	struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr;
+	struct sock *sk = sock->sk;
+	struct inet_sock *inet = inet_sk(sk);
+	struct ipv6_pinfo *np = inet6_sk(sk);
+	__u32 v4addr = 0;
+	unsigned short snum;
+	int addr_type = 0;
+	int err = 0;
+
+	/* If the socket has its own bind function then use it. */
+	if (sk->sk_prot->bind)
+		return sk->sk_prot->bind(sk, uaddr, addr_len);
+
+	if (addr_len < SIN6_LEN_RFC2133)
+		return -EINVAL;
+	addr_type = ipv6_addr_type(&addr->sin6_addr);
+	if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
+		return -EINVAL;
+
+	snum = ntohs(addr->sin6_port);
+	if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
+		return -EACCES;
+
+	lock_sock(sk);
+
+	/* Check these errors (active socket, double bind). */
+	if (sk->sk_state != TCP_CLOSE || inet->num) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	/* Check if the address belongs to the host. */
+	if (addr_type == IPV6_ADDR_MAPPED) {
+		v4addr = addr->sin6_addr.s6_addr32[3];
+		if (inet_addr_type(v4addr) != RTN_LOCAL) {
+			err = -EADDRNOTAVAIL;
+			goto out;
+		}
+	} else {
+		if (addr_type != IPV6_ADDR_ANY) {
+			struct net_device *dev = NULL;
+
+			if (addr_type & IPV6_ADDR_LINKLOCAL) {
+				if (addr_len >= sizeof(struct sockaddr_in6) &&
+				    addr->sin6_scope_id) {
+					/* Override any existing binding, if another one
+					 * is supplied by user.
+					 */
+					sk->sk_bound_dev_if = addr->sin6_scope_id;
+				}
+				
+				/* Binding to link-local address requires an interface */
+				if (!sk->sk_bound_dev_if) {
+					err = -EINVAL;
+					goto out;
+				}
+				dev = dev_get_by_index(sk->sk_bound_dev_if);
+				if (!dev) {
+					err = -ENODEV;
+					goto out;
+				}
+			}
+
+			/* ipv4 addr of the socket is invalid.  Only the
+			 * unspecified and mapped address have a v4 equivalent.
+			 */
+			v4addr = LOOPBACK4_IPV6;
+			if (!(addr_type & IPV6_ADDR_MULTICAST))	{
+				if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) {
+					if (dev)
+						dev_put(dev);
+					err = -EADDRNOTAVAIL;
+					goto out;
+				}
+			}
+			if (dev)
+				dev_put(dev);
+		}
+	}
+
+	inet->rcv_saddr = v4addr;
+	inet->saddr = v4addr;
+
+	ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
+		
+	if (!(addr_type & IPV6_ADDR_MULTICAST))
+		ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
+
+	/* Make sure we are allowed to bind here. */
+	if (sk->sk_prot->get_port(sk, snum)) {
+		inet_reset_saddr(sk);
+		err = -EADDRINUSE;
+		goto out;
+	}
+
+	if (addr_type != IPV6_ADDR_ANY)
+		sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
+	if (snum)
+		sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
+	inet->sport = ntohs(inet->num);
+	inet->dport = 0;
+	inet->daddr = 0;
+out:
+	release_sock(sk);
+	return err;
+}
+
+int inet6_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+
+	if (sk == NULL)
+		return -EINVAL;
+
+	/* Free mc lists */
+	ipv6_sock_mc_close(sk);
+
+	/* Free ac lists */
+	ipv6_sock_ac_close(sk);
+
+	return inet_release(sock);
+}
+
+int inet6_destroy_sock(struct sock *sk)
+{
+	struct ipv6_pinfo *np = inet6_sk(sk);
+	struct sk_buff *skb;
+	struct ipv6_txoptions *opt;
+
+	/*
+	 *	Release destination entry
+	 */
+
+	sk_dst_reset(sk);
+
+	/* Release rx options */
+
+	if ((skb = xchg(&np->pktoptions, NULL)) != NULL)
+		kfree_skb(skb);
+
+	/* Free flowlabels */
+	fl6_free_socklist(sk);
+
+	/* Free tx options */
+
+	if ((opt = xchg(&np->opt, NULL)) != NULL)
+		sock_kfree_s(sk, opt, opt->tot_len);
+
+	return 0;
+}
+
+/*
+ *	This does both peername and sockname.
+ */
+ 
+int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
+		 int *uaddr_len, int peer)
+{
+	struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr;
+	struct sock *sk = sock->sk;
+	struct inet_sock *inet = inet_sk(sk);
+	struct ipv6_pinfo *np = inet6_sk(sk);
+  
+	sin->sin6_family = AF_INET6;
+	sin->sin6_flowinfo = 0;
+	sin->sin6_scope_id = 0;
+	if (peer) {
+		if (!inet->dport)
+			return -ENOTCONN;
+		if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
+		    peer == 1)
+			return -ENOTCONN;
+		sin->sin6_port = inet->dport;
+		ipv6_addr_copy(&sin->sin6_addr, &np->daddr);
+		if (np->sndflow)
+			sin->sin6_flowinfo = np->flow_label;
+	} else {
+		if (ipv6_addr_any(&np->rcv_saddr))
+			ipv6_addr_copy(&sin->sin6_addr, &np->saddr);
+		else
+			ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr);
+
+		sin->sin6_port = inet->sport;
+	}
+	if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
+		sin->sin6_scope_id = sk->sk_bound_dev_if;
+	*uaddr_len = sizeof(*sin);
+	return(0);
+}
+
+int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	struct sock *sk = sock->sk;
+	int err = -EINVAL;
+
+	switch(cmd) 
+	{
+	case SIOCGSTAMP:
+		return sock_get_timestamp(sk, (struct timeval __user *)arg);
+
+	case SIOCADDRT:
+	case SIOCDELRT:
+	  
+		return(ipv6_route_ioctl(cmd,(void __user *)arg));
+
+	case SIOCSIFADDR:
+		return addrconf_add_ifaddr((void __user *) arg);
+	case SIOCDIFADDR:
+		return addrconf_del_ifaddr((void __user *) arg);
+	case SIOCSIFDSTADDR:
+		return addrconf_set_dstaddr((void __user *) arg);
+	default:
+		if (!sk->sk_prot->ioctl ||
+		    (err = sk->sk_prot->ioctl(sk, cmd, arg)) == -ENOIOCTLCMD)
+			return(dev_ioctl(cmd,(void __user *) arg));		
+		return err;
+	}
+	/*NOTREACHED*/
+	return(0);
+}
+
+struct proto_ops inet6_stream_ops = {
+	.family =	PF_INET6,
+	.owner =	THIS_MODULE,
+	.release =	inet6_release,
+	.bind =		inet6_bind,
+	.connect =	inet_stream_connect,		/* ok		*/
+	.socketpair =	sock_no_socketpair,		/* a do nothing	*/
+	.accept =	inet_accept,			/* ok		*/
+	.getname =	inet6_getname, 
+	.poll =		tcp_poll,			/* ok		*/
+	.ioctl =	inet6_ioctl,			/* must change  */
+	.listen =	inet_listen,			/* ok		*/
+	.shutdown =	inet_shutdown,			/* ok		*/
+	.setsockopt =	sock_common_setsockopt,		/* ok		*/
+	.getsockopt =	sock_common_getsockopt,		/* ok		*/
+	.sendmsg =	inet_sendmsg,			/* ok		*/
+	.recvmsg =	sock_common_recvmsg,		/* ok		*/
+	.mmap =		sock_no_mmap,
+	.sendpage =	tcp_sendpage
+};
+
+struct proto_ops inet6_dgram_ops = {
+	.family =	PF_INET6,
+	.owner =	THIS_MODULE,
+	.release =	inet6_release,
+	.bind =		inet6_bind,
+	.connect =	inet_dgram_connect,		/* ok		*/
+	.socketpair =	sock_no_socketpair,		/* a do nothing	*/
+	.accept =	sock_no_accept,			/* a do nothing	*/
+	.getname =	inet6_getname, 
+	.poll =		udp_poll,			/* ok		*/
+	.ioctl =	inet6_ioctl,			/* must change  */
+	.listen =	sock_no_listen,			/* ok		*/
+	.shutdown =	inet_shutdown,			/* ok		*/
+	.setsockopt =	sock_common_setsockopt,		/* ok		*/
+	.getsockopt =	sock_common_getsockopt,		/* ok		*/
+	.sendmsg =	inet_sendmsg,			/* ok		*/
+	.recvmsg =	sock_common_recvmsg,		/* ok		*/
+	.mmap =		sock_no_mmap,
+	.sendpage =	sock_no_sendpage,
+};
+
+static struct net_proto_family inet6_family_ops = {
+	.family = PF_INET6,
+	.create = inet6_create,
+	.owner	= THIS_MODULE,
+};
+
+#ifdef CONFIG_SYSCTL
+extern void ipv6_sysctl_register(void);
+extern void ipv6_sysctl_unregister(void);
+#endif
+
+/* Same as inet6_dgram_ops, sans udp_poll.  */
+static struct proto_ops inet6_sockraw_ops = {
+	.family =	PF_INET6,
+	.owner =	THIS_MODULE,
+	.release =	inet6_release,
+	.bind =		inet6_bind,
+	.connect =	inet_dgram_connect,		/* ok		*/
+	.socketpair =	sock_no_socketpair,		/* a do nothing	*/
+	.accept =	sock_no_accept,			/* a do nothing	*/
+	.getname =	inet6_getname, 
+	.poll =		datagram_poll,			/* ok		*/
+	.ioctl =	inet6_ioctl,			/* must change  */
+	.listen =	sock_no_listen,			/* ok		*/
+	.shutdown =	inet_shutdown,			/* ok		*/
+	.setsockopt =	sock_common_setsockopt,		/* ok		*/
+	.getsockopt =	sock_common_getsockopt,		/* ok		*/
+	.sendmsg =	inet_sendmsg,			/* ok		*/
+	.recvmsg =	sock_common_recvmsg,		/* ok		*/
+	.mmap =		sock_no_mmap,
+	.sendpage =	sock_no_sendpage,
+};
+
+static struct inet_protosw rawv6_protosw = {
+	.type		= SOCK_RAW,
+	.protocol	= IPPROTO_IP,	/* wild card */
+	.prot		= &rawv6_prot,
+	.ops		= &inet6_sockraw_ops,
+	.capability	= CAP_NET_RAW,
+	.no_check	= UDP_CSUM_DEFAULT,
+	.flags		= INET_PROTOSW_REUSE,
+};
+
+void
+inet6_register_protosw(struct inet_protosw *p)
+{
+	struct list_head *lh;
+	struct inet_protosw *answer;
+	int protocol = p->protocol;
+	struct list_head *last_perm;
+
+	spin_lock_bh(&inetsw6_lock);
+
+	if (p->type >= SOCK_MAX)
+		goto out_illegal;
+
+	/* If we are trying to override a permanent protocol, bail. */
+	answer = NULL;
+	last_perm = &inetsw6[p->type];
+	list_for_each(lh, &inetsw6[p->type]) {
+		answer = list_entry(lh, struct inet_protosw, list);
+
+		/* Check only the non-wild match. */
+		if (INET_PROTOSW_PERMANENT & answer->flags) {
+			if (protocol == answer->protocol)
+				break;
+			last_perm = lh;
+		}
+
+		answer = NULL;
+	}
+	if (answer)
+		goto out_permanent;
+
+	/* Add the new entry after the last permanent entry if any, so that
+	 * the new entry does not override a permanent entry when matched with
+	 * a wild-card protocol. But it is allowed to override any existing
+	 * non-permanent entry.  This means that when we remove this entry, the 
+	 * system automatically returns to the old behavior.
+	 */
+	list_add_rcu(&p->list, last_perm);
+out:
+	spin_unlock_bh(&inetsw6_lock);
+	return;
+
+out_permanent:
+	printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
+	       protocol);
+	goto out;
+
+out_illegal:
+	printk(KERN_ERR
+	       "Ignoring attempt to register invalid socket type %d.\n",
+	       p->type);
+	goto out;
+}
+
+void
+inet6_unregister_protosw(struct inet_protosw *p)
+{
+	if (INET_PROTOSW_PERMANENT & p->flags) {
+		printk(KERN_ERR
+		       "Attempt to unregister permanent protocol %d.\n",
+		       p->protocol);
+	} else {
+		spin_lock_bh(&inetsw6_lock);
+		list_del_rcu(&p->list);
+		spin_unlock_bh(&inetsw6_lock);
+
+		synchronize_net();
+	}
+}
+
+int
+snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign)
+{
+	if (ptr == NULL)
+		return -EINVAL;
+
+	ptr[0] = __alloc_percpu(mibsize, mibalign);
+	if (!ptr[0])
+		goto err0;
+
+	ptr[1] = __alloc_percpu(mibsize, mibalign);
+	if (!ptr[1])
+		goto err1;
+
+	return 0;
+
+err1:
+	free_percpu(ptr[0]);
+	ptr[0] = NULL;
+err0:
+	return -ENOMEM;
+}
+
+void
+snmp6_mib_free(void *ptr[2])
+{
+	if (ptr == NULL)
+		return;
+	if (ptr[0])
+		free_percpu(ptr[0]);
+	if (ptr[1])
+		free_percpu(ptr[1]);
+	ptr[0] = ptr[1] = NULL;
+}
+
+static int __init init_ipv6_mibs(void)
+{
+	if (snmp6_mib_init((void **)ipv6_statistics, sizeof (struct ipstats_mib),
+			   __alignof__(struct ipstats_mib)) < 0)
+		goto err_ip_mib;
+	if (snmp6_mib_init((void **)icmpv6_statistics, sizeof (struct icmpv6_mib),
+			   __alignof__(struct icmpv6_mib)) < 0)
+		goto err_icmp_mib;
+	if (snmp6_mib_init((void **)udp_stats_in6, sizeof (struct udp_mib),
+			   __alignof__(struct udp_mib)) < 0)
+		goto err_udp_mib;
+	return 0;
+
+err_udp_mib:
+	snmp6_mib_free((void **)icmpv6_statistics);
+err_icmp_mib:
+	snmp6_mib_free((void **)ipv6_statistics);
+err_ip_mib:
+	return -ENOMEM;
+	
+}
+
+static void cleanup_ipv6_mibs(void)
+{
+	snmp6_mib_free((void **)ipv6_statistics);
+	snmp6_mib_free((void **)icmpv6_statistics);
+	snmp6_mib_free((void **)udp_stats_in6);
+}
+
+extern int ipv6_misc_proc_init(void);
+
+static int __init inet6_init(void)
+{
+	struct sk_buff *dummy_skb;
+        struct list_head *r;
+	int err;
+
+#ifdef MODULE
+#if 0 /* FIXME --RR */
+	if (!mod_member_present(&__this_module, can_unload))
+	  return -EINVAL;
+
+	__this_module.can_unload = &ipv6_unload;
+#endif
+#endif
+
+	if (sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)) {
+		printk(KERN_CRIT "inet6_proto_init: size fault\n");
+		return -EINVAL;
+	}
+
+	err = proto_register(&tcpv6_prot, 1);
+	if (err)
+		goto out;
+
+	err = proto_register(&udpv6_prot, 1);
+	if (err)
+		goto out_unregister_tcp_proto;
+
+	err = proto_register(&rawv6_prot, 1);
+	if (err)
+		goto out_unregister_udp_proto;
+
+
+	/* Register the socket-side information for inet6_create.  */
+	for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
+		INIT_LIST_HEAD(r);
+
+	/* We MUST register RAW sockets before we create the ICMP6,
+	 * IGMP6, or NDISC control sockets.
+	 */
+	inet6_register_protosw(&rawv6_protosw);
+
+	/* Register the family here so that the init calls below will
+	 * be able to create sockets. (?? is this dangerous ??)
+	 */
+	(void) sock_register(&inet6_family_ops);
+
+	/* Initialise ipv6 mibs */
+	err = init_ipv6_mibs();
+	if (err)
+		goto out_unregister_raw_proto;
+	
+	/*
+	 *	ipngwg API draft makes clear that the correct semantics
+	 *	for TCP and UDP is to consider one TCP and UDP instance
+	 *	in a host availiable by both INET and INET6 APIs and
+	 *	able to communicate via both network protocols.
+	 */
+
+#ifdef CONFIG_SYSCTL
+	ipv6_sysctl_register();
+#endif
+	err = icmpv6_init(&inet6_family_ops);
+	if (err)
+		goto icmp_fail;
+	err = ndisc_init(&inet6_family_ops);
+	if (err)
+		goto ndisc_fail;
+	err = igmp6_init(&inet6_family_ops);
+	if (err)
+		goto igmp_fail;
+	/* Create /proc/foo6 entries. */
+#ifdef CONFIG_PROC_FS
+	err = -ENOMEM;
+	if (raw6_proc_init())
+		goto proc_raw6_fail;
+	if (tcp6_proc_init())
+		goto proc_tcp6_fail;
+	if (udp6_proc_init())
+		goto proc_udp6_fail;
+	if (ipv6_misc_proc_init())
+		goto proc_misc6_fail;
+
+	if (ac6_proc_init())
+		goto proc_anycast6_fail;
+	if (if6_proc_init())
+		goto proc_if6_fail;
+#endif
+	ipv6_packet_init();
+	ip6_route_init();
+	ip6_flowlabel_init();
+	err = addrconf_init();
+	if (err)
+		goto addrconf_fail;
+	sit_init();
+
+	/* Init v6 extension headers. */
+	ipv6_rthdr_init();
+	ipv6_frag_init();
+	ipv6_nodata_init();
+	ipv6_destopt_init();
+
+	/* Init v6 transport protocols. */
+	udpv6_init();
+	tcpv6_init();
+	err = 0;
+out:
+	return err;
+
+addrconf_fail:
+	ip6_flowlabel_cleanup();
+	ip6_route_cleanup();
+	ipv6_packet_cleanup();
+#ifdef CONFIG_PROC_FS
+	if6_proc_exit();
+proc_if6_fail:
+	ac6_proc_exit();
+proc_anycast6_fail:
+	ipv6_misc_proc_exit();
+proc_misc6_fail:
+	udp6_proc_exit();
+proc_udp6_fail:
+	tcp6_proc_exit();
+proc_tcp6_fail:
+	raw6_proc_exit();
+proc_raw6_fail:
+#endif
+	igmp6_cleanup();
+igmp_fail:
+	ndisc_cleanup();
+ndisc_fail:
+	icmpv6_cleanup();
+icmp_fail:
+#ifdef CONFIG_SYSCTL
+	ipv6_sysctl_unregister();
+#endif
+	cleanup_ipv6_mibs();
+out_unregister_raw_proto:
+	proto_unregister(&rawv6_prot);
+out_unregister_udp_proto:
+	proto_unregister(&udpv6_prot);
+out_unregister_tcp_proto:
+	proto_unregister(&tcpv6_prot);
+	goto out;
+}
+module_init(inet6_init);
+
+static void __exit inet6_exit(void)
+{
+	/* First of all disallow new sockets creation. */
+	sock_unregister(PF_INET6);
+#ifdef CONFIG_PROC_FS
+	if6_proc_exit();
+	ac6_proc_exit();
+ 	ipv6_misc_proc_exit();
+ 	udp6_proc_exit();
+ 	tcp6_proc_exit();
+ 	raw6_proc_exit();
+#endif
+	/* Cleanup code parts. */
+	sit_cleanup();
+	ip6_flowlabel_cleanup();
+	addrconf_cleanup();
+	ip6_route_cleanup();
+	ipv6_packet_cleanup();
+	igmp6_cleanup();
+	ndisc_cleanup();
+	icmpv6_cleanup();
+#ifdef CONFIG_SYSCTL
+	ipv6_sysctl_unregister();	
+#endif
+	cleanup_ipv6_mibs();
+	proto_unregister(&rawv6_prot);
+	proto_unregister(&udpv6_prot);
+	proto_unregister(&tcpv6_prot);
+}
+module_exit(inet6_exit);
+
+MODULE_ALIAS_NETPROTO(PF_INET6);