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-rw-r--r--net/ipv6/addrconf.c3615
1 files changed, 3615 insertions, 0 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
new file mode 100644
index 000000000000..5ffde14ddc09
--- /dev/null
+++ b/net/ipv6/addrconf.c
@@ -0,0 +1,3615 @@
+/*
+ * IPv6 Address [auto]configuration
+ * Linux INET6 implementation
+ *
+ * Authors:
+ * Pedro Roque <roque@di.fc.ul.pt>
+ * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
+ *
+ * $Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
+ *
+ * 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:
+ *
+ * Janos Farkas : delete timer on ifdown
+ * <chexum@bankinf.banki.hu>
+ * Andi Kleen : kill double kfree on module
+ * unload.
+ * Maciej W. Rozycki : FDDI support
+ * sekiya@USAGI : Don't send too many RS
+ * packets.
+ * yoshfuji@USAGI : Fixed interval between DAD
+ * packets.
+ * YOSHIFUJI Hideaki @USAGI : improved accuracy of
+ * address validation timer.
+ * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
+ * support.
+ * Yuji SEKIYA @USAGI : Don't assign a same IPv6
+ * address on a same interface.
+ * YOSHIFUJI Hideaki @USAGI : ARCnet support
+ * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
+ * seq_file.
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/sched.h>
+#include <linux/net.h>
+#include <linux/in6.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/if_arcnet.h>
+#include <linux/if_infiniband.h>
+#include <linux/route.h>
+#include <linux/inetdevice.h>
+#include <linux/init.h>
+#ifdef CONFIG_SYSCTL
+#include <linux/sysctl.h>
+#endif
+#include <linux/delay.h>
+#include <linux/notifier.h>
+
+#include <net/sock.h>
+#include <net/snmp.h>
+
+#include <net/ipv6.h>
+#include <net/protocol.h>
+#include <net/ndisc.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+#include <net/tcp.h>
+#include <net/ip.h>
+#include <linux/if_tunnel.h>
+#include <linux/rtnetlink.h>
+
+#ifdef CONFIG_IPV6_PRIVACY
+#include <linux/random.h>
+#include <linux/crypto.h>
+#include <asm/scatterlist.h>
+#endif
+
+#include <asm/uaccess.h>
+
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+/* Set to 3 to get tracing... */
+#define ACONF_DEBUG 2
+
+#if ACONF_DEBUG >= 3
+#define ADBG(x) printk x
+#else
+#define ADBG(x)
+#endif
+
+#define INFINITY_LIFE_TIME 0xFFFFFFFF
+#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))
+
+#ifdef CONFIG_SYSCTL
+static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
+static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
+#endif
+
+#ifdef CONFIG_IPV6_PRIVACY
+static int __ipv6_regen_rndid(struct inet6_dev *idev);
+static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
+static void ipv6_regen_rndid(unsigned long data);
+
+static int desync_factor = MAX_DESYNC_FACTOR * HZ;
+static struct crypto_tfm *md5_tfm;
+static DEFINE_SPINLOCK(md5_tfm_lock);
+#endif
+
+static int ipv6_count_addresses(struct inet6_dev *idev);
+
+/*
+ * Configured unicast address hash table
+ */
+static struct inet6_ifaddr *inet6_addr_lst[IN6_ADDR_HSIZE];
+static DEFINE_RWLOCK(addrconf_hash_lock);
+
+/* Protects inet6 devices */
+DEFINE_RWLOCK(addrconf_lock);
+
+static void addrconf_verify(unsigned long);
+
+static struct timer_list addr_chk_timer =
+ TIMER_INITIALIZER(addrconf_verify, 0, 0);
+static DEFINE_SPINLOCK(addrconf_verify_lock);
+
+static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
+static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
+
+static int addrconf_ifdown(struct net_device *dev, int how);
+
+static void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags);
+static void addrconf_dad_timer(unsigned long data);
+static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
+static void addrconf_rs_timer(unsigned long data);
+static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
+static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
+
+static void inet6_prefix_notify(int event, struct inet6_dev *idev,
+ struct prefix_info *pinfo);
+static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);
+
+static struct notifier_block *inet6addr_chain;
+
+struct ipv6_devconf ipv6_devconf = {
+ .forwarding = 0,
+ .hop_limit = IPV6_DEFAULT_HOPLIMIT,
+ .mtu6 = IPV6_MIN_MTU,
+ .accept_ra = 1,
+ .accept_redirects = 1,
+ .autoconf = 1,
+ .force_mld_version = 0,
+ .dad_transmits = 1,
+ .rtr_solicits = MAX_RTR_SOLICITATIONS,
+ .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
+ .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
+#ifdef CONFIG_IPV6_PRIVACY
+ .use_tempaddr = 0,
+ .temp_valid_lft = TEMP_VALID_LIFETIME,
+ .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
+ .regen_max_retry = REGEN_MAX_RETRY,
+ .max_desync_factor = MAX_DESYNC_FACTOR,
+#endif
+ .max_addresses = IPV6_MAX_ADDRESSES,
+};
+
+static struct ipv6_devconf ipv6_devconf_dflt = {
+ .forwarding = 0,
+ .hop_limit = IPV6_DEFAULT_HOPLIMIT,
+ .mtu6 = IPV6_MIN_MTU,
+ .accept_ra = 1,
+ .accept_redirects = 1,
+ .autoconf = 1,
+ .dad_transmits = 1,
+ .rtr_solicits = MAX_RTR_SOLICITATIONS,
+ .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
+ .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
+#ifdef CONFIG_IPV6_PRIVACY
+ .use_tempaddr = 0,
+ .temp_valid_lft = TEMP_VALID_LIFETIME,
+ .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
+ .regen_max_retry = REGEN_MAX_RETRY,
+ .max_desync_factor = MAX_DESYNC_FACTOR,
+#endif
+ .max_addresses = IPV6_MAX_ADDRESSES,
+};
+
+/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
+#if 0
+const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
+#endif
+const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
+
+int ipv6_addr_type(const struct in6_addr *addr)
+{
+ int type;
+ u32 st;
+
+ st = addr->s6_addr32[0];
+
+ if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
+ type = IPV6_ADDR_MULTICAST;
+
+ switch((st & htonl(0x00FF0000))) {
+ case __constant_htonl(0x00010000):
+ type |= IPV6_ADDR_LOOPBACK;
+ break;
+
+ case __constant_htonl(0x00020000):
+ type |= IPV6_ADDR_LINKLOCAL;
+ break;
+
+ case __constant_htonl(0x00050000):
+ type |= IPV6_ADDR_SITELOCAL;
+ break;
+ };
+ return type;
+ }
+
+ type = IPV6_ADDR_UNICAST;
+
+ /* Consider all addresses with the first three bits different of
+ 000 and 111 as finished.
+ */
+ if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
+ (st & htonl(0xE0000000)) != htonl(0xE0000000))
+ return type;
+
+ if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
+ return (IPV6_ADDR_LINKLOCAL | type);
+
+ if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
+ return (IPV6_ADDR_SITELOCAL | type);
+
+ if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
+ if (addr->s6_addr32[2] == 0) {
+ if (addr->s6_addr32[3] == 0)
+ return IPV6_ADDR_ANY;
+
+ if (addr->s6_addr32[3] == htonl(0x00000001))
+ return (IPV6_ADDR_LOOPBACK | type);
+
+ return (IPV6_ADDR_COMPATv4 | type);
+ }
+
+ if (addr->s6_addr32[2] == htonl(0x0000ffff))
+ return IPV6_ADDR_MAPPED;
+ }
+
+ st &= htonl(0xFF000000);
+ if (st == 0)
+ return IPV6_ADDR_RESERVED;
+ st &= htonl(0xFE000000);
+ if (st == htonl(0x02000000))
+ return IPV6_ADDR_RESERVED; /* for NSAP */
+ if (st == htonl(0x04000000))
+ return IPV6_ADDR_RESERVED; /* for IPX */
+ return type;
+}
+
+static void addrconf_del_timer(struct inet6_ifaddr *ifp)
+{
+ if (del_timer(&ifp->timer))
+ __in6_ifa_put(ifp);
+}
+
+enum addrconf_timer_t
+{
+ AC_NONE,
+ AC_DAD,
+ AC_RS,
+};
+
+static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
+ enum addrconf_timer_t what,
+ unsigned long when)
+{
+ if (!del_timer(&ifp->timer))
+ in6_ifa_hold(ifp);
+
+ switch (what) {
+ case AC_DAD:
+ ifp->timer.function = addrconf_dad_timer;
+ break;
+ case AC_RS:
+ ifp->timer.function = addrconf_rs_timer;
+ break;
+ default:;
+ }
+ ifp->timer.expires = jiffies + when;
+ add_timer(&ifp->timer);
+}
+
+/* Nobody refers to this device, we may destroy it. */
+
+void in6_dev_finish_destroy(struct inet6_dev *idev)
+{
+ struct net_device *dev = idev->dev;
+ BUG_TRAP(idev->addr_list==NULL);
+ BUG_TRAP(idev->mc_list==NULL);
+#ifdef NET_REFCNT_DEBUG
+ printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
+#endif
+ dev_put(dev);
+ if (!idev->dead) {
+ printk("Freeing alive inet6 device %p\n", idev);
+ return;
+ }
+ snmp6_free_dev(idev);
+ kfree(idev);
+}
+
+static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
+{
+ struct inet6_dev *ndev;
+
+ ASSERT_RTNL();
+
+ if (dev->mtu < IPV6_MIN_MTU)
+ return NULL;
+
+ ndev = kmalloc(sizeof(struct inet6_dev), GFP_KERNEL);
+
+ if (ndev) {
+ memset(ndev, 0, sizeof(struct inet6_dev));
+
+ rwlock_init(&ndev->lock);
+ ndev->dev = dev;
+ memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
+ ndev->cnf.mtu6 = dev->mtu;
+ ndev->cnf.sysctl = NULL;
+ ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
+ if (ndev->nd_parms == NULL) {
+ kfree(ndev);
+ return NULL;
+ }
+ /* We refer to the device */
+ dev_hold(dev);
+
+ if (snmp6_alloc_dev(ndev) < 0) {
+ ADBG((KERN_WARNING
+ "%s(): cannot allocate memory for statistics; dev=%s.\n",
+ __FUNCTION__, dev->name));
+ neigh_parms_release(&nd_tbl, ndev->nd_parms);
+ ndev->dead = 1;
+ in6_dev_finish_destroy(ndev);
+ return NULL;
+ }
+
+ if (snmp6_register_dev(ndev) < 0) {
+ ADBG((KERN_WARNING
+ "%s(): cannot create /proc/net/dev_snmp6/%s\n",
+ __FUNCTION__, dev->name));
+ neigh_parms_release(&nd_tbl, ndev->nd_parms);
+ ndev->dead = 1;
+ in6_dev_finish_destroy(ndev);
+ return NULL;
+ }
+
+ /* One reference from device. We must do this before
+ * we invoke __ipv6_regen_rndid().
+ */
+ in6_dev_hold(ndev);
+
+#ifdef CONFIG_IPV6_PRIVACY
+ get_random_bytes(ndev->rndid, sizeof(ndev->rndid));
+ get_random_bytes(ndev->entropy, sizeof(ndev->entropy));
+ init_timer(&ndev->regen_timer);
+ ndev->regen_timer.function = ipv6_regen_rndid;
+ ndev->regen_timer.data = (unsigned long) ndev;
+ if ((dev->flags&IFF_LOOPBACK) ||
+ dev->type == ARPHRD_TUNNEL ||
+ dev->type == ARPHRD_SIT) {
+ printk(KERN_INFO
+ "Disabled Privacy Extensions on device %p(%s)\n",
+ dev, dev->name);
+ ndev->cnf.use_tempaddr = -1;
+ } else {
+ in6_dev_hold(ndev);
+ ipv6_regen_rndid((unsigned long) ndev);
+ }
+#endif
+
+ write_lock_bh(&addrconf_lock);
+ dev->ip6_ptr = ndev;
+ write_unlock_bh(&addrconf_lock);
+
+ ipv6_mc_init_dev(ndev);
+ ndev->tstamp = jiffies;
+#ifdef CONFIG_SYSCTL
+ neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
+ NET_IPV6_NEIGH, "ipv6",
+ &ndisc_ifinfo_sysctl_change,
+ NULL);
+ addrconf_sysctl_register(ndev, &ndev->cnf);
+#endif
+ }
+ return ndev;
+}
+
+static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
+{
+ struct inet6_dev *idev;
+
+ ASSERT_RTNL();
+
+ if ((idev = __in6_dev_get(dev)) == NULL) {
+ if ((idev = ipv6_add_dev(dev)) == NULL)
+ return NULL;
+ }
+ if (dev->flags&IFF_UP)
+ ipv6_mc_up(idev);
+ return idev;
+}
+
+#ifdef CONFIG_SYSCTL
+static void dev_forward_change(struct inet6_dev *idev)
+{
+ struct net_device *dev;
+ struct inet6_ifaddr *ifa;
+ struct in6_addr addr;
+
+ if (!idev)
+ return;
+ dev = idev->dev;
+ if (dev && (dev->flags & IFF_MULTICAST)) {
+ ipv6_addr_all_routers(&addr);
+
+ if (idev->cnf.forwarding)
+ ipv6_dev_mc_inc(dev, &addr);
+ else
+ ipv6_dev_mc_dec(dev, &addr);
+ }
+ for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
+ if (idev->cnf.forwarding)
+ addrconf_join_anycast(ifa);
+ else
+ addrconf_leave_anycast(ifa);
+ }
+}
+
+
+static void addrconf_forward_change(void)
+{
+ struct net_device *dev;
+ struct inet6_dev *idev;
+
+ read_lock(&dev_base_lock);
+ for (dev=dev_base; dev; dev=dev->next) {
+ read_lock(&addrconf_lock);
+ idev = __in6_dev_get(dev);
+ if (idev) {
+ int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
+ idev->cnf.forwarding = ipv6_devconf.forwarding;
+ if (changed)
+ dev_forward_change(idev);
+ }
+ read_unlock(&addrconf_lock);
+ }
+ read_unlock(&dev_base_lock);
+}
+#endif
+
+/* Nobody refers to this ifaddr, destroy it */
+
+void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
+{
+ BUG_TRAP(ifp->if_next==NULL);
+ BUG_TRAP(ifp->lst_next==NULL);
+#ifdef NET_REFCNT_DEBUG
+ printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
+#endif
+
+ in6_dev_put(ifp->idev);
+
+ if (del_timer(&ifp->timer))
+ printk("Timer is still running, when freeing ifa=%p\n", ifp);
+
+ if (!ifp->dead) {
+ printk("Freeing alive inet6 address %p\n", ifp);
+ return;
+ }
+ dst_release(&ifp->rt->u.dst);
+
+ kfree(ifp);
+}
+
+/* On success it returns ifp with increased reference count */
+
+static struct inet6_ifaddr *
+ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
+ int scope, unsigned flags)
+{
+ struct inet6_ifaddr *ifa = NULL;
+ struct rt6_info *rt;
+ int hash;
+ int err = 0;
+
+ read_lock_bh(&addrconf_lock);
+ if (idev->dead) {
+ err = -ENODEV; /*XXX*/
+ goto out2;
+ }
+
+ write_lock(&addrconf_hash_lock);
+
+ /* Ignore adding duplicate addresses on an interface */
+ if (ipv6_chk_same_addr(addr, idev->dev)) {
+ ADBG(("ipv6_add_addr: already assigned\n"));
+ err = -EEXIST;
+ goto out;
+ }
+
+ ifa = kmalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
+
+ if (ifa == NULL) {
+ ADBG(("ipv6_add_addr: malloc failed\n"));
+ err = -ENOBUFS;
+ goto out;
+ }
+
+ rt = addrconf_dst_alloc(idev, addr, 0);
+ if (IS_ERR(rt)) {
+ err = PTR_ERR(rt);
+ goto out;
+ }
+
+ memset(ifa, 0, sizeof(struct inet6_ifaddr));
+ ipv6_addr_copy(&ifa->addr, addr);
+
+ spin_lock_init(&ifa->lock);
+ init_timer(&ifa->timer);
+ ifa->timer.data = (unsigned long) ifa;
+ ifa->scope = scope;
+ ifa->prefix_len = pfxlen;
+ ifa->flags = flags | IFA_F_TENTATIVE;
+ ifa->cstamp = ifa->tstamp = jiffies;
+
+ ifa->idev = idev;
+ in6_dev_hold(idev);
+ /* For caller */
+ in6_ifa_hold(ifa);
+
+ /* Add to big hash table */
+ hash = ipv6_addr_hash(addr);
+
+ ifa->lst_next = inet6_addr_lst[hash];
+ inet6_addr_lst[hash] = ifa;
+ in6_ifa_hold(ifa);
+ write_unlock(&addrconf_hash_lock);
+
+ write_lock(&idev->lock);
+ /* Add to inet6_dev unicast addr list. */
+ ifa->if_next = idev->addr_list;
+ idev->addr_list = ifa;
+
+#ifdef CONFIG_IPV6_PRIVACY
+ if (ifa->flags&IFA_F_TEMPORARY) {
+ ifa->tmp_next = idev->tempaddr_list;
+ idev->tempaddr_list = ifa;
+ in6_ifa_hold(ifa);
+ }
+#endif
+
+ ifa->rt = rt;
+
+ in6_ifa_hold(ifa);
+ write_unlock(&idev->lock);
+out2:
+ read_unlock_bh(&addrconf_lock);
+
+ if (unlikely(err == 0))
+ notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
+ else {
+ kfree(ifa);
+ ifa = ERR_PTR(err);
+ }
+
+ return ifa;
+out:
+ write_unlock(&addrconf_hash_lock);
+ goto out2;
+}
+
+/* This function wants to get referenced ifp and releases it before return */
+
+static void ipv6_del_addr(struct inet6_ifaddr *ifp)
+{
+ struct inet6_ifaddr *ifa, **ifap;
+ struct inet6_dev *idev = ifp->idev;
+ int hash;
+ int deleted = 0, onlink = 0;
+ unsigned long expires = jiffies;
+
+ hash = ipv6_addr_hash(&ifp->addr);
+
+ ifp->dead = 1;
+
+ write_lock_bh(&addrconf_hash_lock);
+ for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
+ ifap = &ifa->lst_next) {
+ if (ifa == ifp) {
+ *ifap = ifa->lst_next;
+ __in6_ifa_put(ifp);
+ ifa->lst_next = NULL;
+ break;
+ }
+ }
+ write_unlock_bh(&addrconf_hash_lock);
+
+ write_lock_bh(&idev->lock);
+#ifdef CONFIG_IPV6_PRIVACY
+ if (ifp->flags&IFA_F_TEMPORARY) {
+ for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
+ ifap = &ifa->tmp_next) {
+ if (ifa == ifp) {
+ *ifap = ifa->tmp_next;
+ if (ifp->ifpub) {
+ in6_ifa_put(ifp->ifpub);
+ ifp->ifpub = NULL;
+ }
+ __in6_ifa_put(ifp);
+ ifa->tmp_next = NULL;
+ break;
+ }
+ }
+ }
+#endif
+
+ for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;
+ ifap = &ifa->if_next) {
+ if (ifa == ifp) {
+ *ifap = ifa->if_next;
+ __in6_ifa_put(ifp);
+ ifa->if_next = NULL;
+ if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
+ break;
+ deleted = 1;
+ } else if (ifp->flags & IFA_F_PERMANENT) {
+ if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
+ ifp->prefix_len)) {
+ if (ifa->flags & IFA_F_PERMANENT) {
+ onlink = 1;
+ if (deleted)
+ break;
+ } else {
+ unsigned long lifetime;
+
+ if (!onlink)
+ onlink = -1;
+
+ spin_lock(&ifa->lock);
+ lifetime = min_t(unsigned long,
+ ifa->valid_lft, 0x7fffffffUL/HZ);
+ if (time_before(expires,
+ ifa->tstamp + lifetime * HZ))
+ expires = ifa->tstamp + lifetime * HZ;
+ spin_unlock(&ifa->lock);
+ }
+ }
+ }
+ }
+ write_unlock_bh(&idev->lock);
+
+ ipv6_ifa_notify(RTM_DELADDR, ifp);
+
+ notifier_call_chain(&inet6addr_chain,NETDEV_DOWN,ifp);
+
+ addrconf_del_timer(ifp);
+
+ /*
+ * Purge or update corresponding prefix
+ *
+ * 1) we don't purge prefix here if address was not permanent.
+ * prefix is managed by its own lifetime.
+ * 2) if there're no addresses, delete prefix.
+ * 3) if there're still other permanent address(es),
+ * corresponding prefix is still permanent.
+ * 4) otherwise, update prefix lifetime to the
+ * longest valid lifetime among the corresponding
+ * addresses on the device.
+ * Note: subsequent RA will update lifetime.
+ *
+ * --yoshfuji
+ */
+ if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
+ struct in6_addr prefix;
+ struct rt6_info *rt;
+
+ ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
+ rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);
+
+ if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
+ if (onlink == 0) {
+ ip6_del_rt(rt, NULL, NULL);
+ rt = NULL;
+ } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
+ rt->rt6i_expires = expires;
+ rt->rt6i_flags |= RTF_EXPIRES;
+ }
+ }
+ dst_release(&rt->u.dst);
+ }
+
+ in6_ifa_put(ifp);
+}
+
+#ifdef CONFIG_IPV6_PRIVACY
+static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
+{
+ struct inet6_dev *idev = ifp->idev;
+ struct in6_addr addr, *tmpaddr;
+ unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
+ int tmp_plen;
+ int ret = 0;
+ int max_addresses;
+
+ write_lock(&idev->lock);
+ if (ift) {
+ spin_lock_bh(&ift->lock);
+ memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
+ spin_unlock_bh(&ift->lock);
+ tmpaddr = &addr;
+ } else {
+ tmpaddr = NULL;
+ }
+retry:
+ in6_dev_hold(idev);
+ if (idev->cnf.use_tempaddr <= 0) {
+ write_unlock(&idev->lock);
+ printk(KERN_INFO
+ "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
+ in6_dev_put(idev);
+ ret = -1;
+ goto out;
+ }
+ spin_lock_bh(&ifp->lock);
+ if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
+ idev->cnf.use_tempaddr = -1; /*XXX*/
+ spin_unlock_bh(&ifp->lock);
+ write_unlock(&idev->lock);
+ printk(KERN_WARNING
+ "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
+ in6_dev_put(idev);
+ ret = -1;
+ goto out;
+ }
+ in6_ifa_hold(ifp);
+ memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
+ if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
+ spin_unlock_bh(&ifp->lock);
+ write_unlock(&idev->lock);
+ printk(KERN_WARNING
+ "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
+ in6_ifa_put(ifp);
+ in6_dev_put(idev);
+ ret = -1;
+ goto out;
+ }
+ memcpy(&addr.s6_addr[8], idev->rndid, 8);
+ tmp_valid_lft = min_t(__u32,
+ ifp->valid_lft,
+ idev->cnf.temp_valid_lft);
+ tmp_prefered_lft = min_t(__u32,
+ ifp->prefered_lft,
+ idev->cnf.temp_prefered_lft - desync_factor / HZ);
+ tmp_plen = ifp->prefix_len;
+ max_addresses = idev->cnf.max_addresses;
+ tmp_cstamp = ifp->cstamp;
+ tmp_tstamp = ifp->tstamp;
+ spin_unlock_bh(&ifp->lock);
+
+ write_unlock(&idev->lock);
+ ift = !max_addresses ||
+ ipv6_count_addresses(idev) < max_addresses ?
+ ipv6_add_addr(idev, &addr, tmp_plen,
+ ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL;
+ if (!ift || IS_ERR(ift)) {
+ in6_ifa_put(ifp);
+ in6_dev_put(idev);
+ printk(KERN_INFO
+ "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
+ tmpaddr = &addr;
+ write_lock(&idev->lock);
+ goto retry;
+ }
+
+ spin_lock_bh(&ift->lock);
+ ift->ifpub = ifp;
+ ift->valid_lft = tmp_valid_lft;
+ ift->prefered_lft = tmp_prefered_lft;
+ ift->cstamp = tmp_cstamp;
+ ift->tstamp = tmp_tstamp;
+ spin_unlock_bh(&ift->lock);
+
+ addrconf_dad_start(ift, 0);
+ in6_ifa_put(ift);
+ in6_dev_put(idev);
+out:
+ return ret;
+}
+#endif
+
+/*
+ * Choose an appropriate source address
+ * should do:
+ * i) get an address with an appropriate scope
+ * ii) see if there is a specific route for the destination and use
+ * an address of the attached interface
+ * iii) don't use deprecated addresses
+ */
+static int inline ipv6_saddr_pref(const struct inet6_ifaddr *ifp, u8 invpref)
+{
+ int pref;
+ pref = ifp->flags&IFA_F_DEPRECATED ? 0 : 2;
+#ifdef CONFIG_IPV6_PRIVACY
+ pref |= (ifp->flags^invpref)&IFA_F_TEMPORARY ? 0 : 1;
+#endif
+ return pref;
+}
+
+#ifdef CONFIG_IPV6_PRIVACY
+#define IPV6_GET_SADDR_MAXSCORE(score) ((score) == 3)
+#else
+#define IPV6_GET_SADDR_MAXSCORE(score) (score)
+#endif
+
+int ipv6_dev_get_saddr(struct net_device *dev,
+ struct in6_addr *daddr, struct in6_addr *saddr)
+{
+ struct inet6_ifaddr *ifp = NULL;
+ struct inet6_ifaddr *match = NULL;
+ struct inet6_dev *idev;
+ int scope;
+ int err;
+ int hiscore = -1, score;
+
+ scope = ipv6_addr_scope(daddr);
+
+ /*
+ * known dev
+ * search dev and walk through dev addresses
+ */
+
+ if (dev) {
+ if (dev->flags & IFF_LOOPBACK)
+ scope = IFA_HOST;
+
+ read_lock(&addrconf_lock);
+ idev = __in6_dev_get(dev);
+ if (idev) {
+ read_lock_bh(&idev->lock);
+ for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
+ if (ifp->scope == scope) {
+ if (ifp->flags&IFA_F_TENTATIVE)
+ continue;
+#ifdef CONFIG_IPV6_PRIVACY
+ score = ipv6_saddr_pref(ifp, idev->cnf.use_tempaddr > 1 ? IFA_F_TEMPORARY : 0);
+#else
+ score = ipv6_saddr_pref(ifp, 0);
+#endif
+ if (score <= hiscore)
+ continue;
+
+ if (match)
+ in6_ifa_put(match);
+ match = ifp;
+ hiscore = score;
+ in6_ifa_hold(ifp);
+
+ if (IPV6_GET_SADDR_MAXSCORE(score)) {
+ read_unlock_bh(&idev->lock);
+ read_unlock(&addrconf_lock);
+ goto out;
+ }
+ }
+ }
+ read_unlock_bh(&idev->lock);
+ }
+ read_unlock(&addrconf_lock);
+ }
+
+ if (scope == IFA_LINK)
+ goto out;
+
+ /*
+ * dev == NULL or search failed for specified dev
+ */
+
+ read_lock(&dev_base_lock);
+ read_lock(&addrconf_lock);
+ for (dev = dev_base; dev; dev=dev->next) {
+ idev = __in6_dev_get(dev);
+ if (idev) {
+ read_lock_bh(&idev->lock);
+ for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
+ if (ifp->scope == scope) {
+ if (ifp->flags&IFA_F_TENTATIVE)
+ continue;
+#ifdef CONFIG_IPV6_PRIVACY
+ score = ipv6_saddr_pref(ifp, idev->cnf.use_tempaddr > 1 ? IFA_F_TEMPORARY : 0);
+#else
+ score = ipv6_saddr_pref(ifp, 0);
+#endif
+ if (score <= hiscore)
+ continue;
+
+ if (match)
+ in6_ifa_put(match);
+ match = ifp;
+ hiscore = score;
+ in6_ifa_hold(ifp);
+
+ if (IPV6_GET_SADDR_MAXSCORE(score)) {
+ read_unlock_bh(&idev->lock);
+ goto out_unlock_base;
+ }
+ }
+ }
+ read_unlock_bh(&idev->lock);
+ }
+ }
+
+out_unlock_base:
+ read_unlock(&addrconf_lock);
+ read_unlock(&dev_base_lock);
+
+out:
+ err = -EADDRNOTAVAIL;
+ if (match) {
+ ipv6_addr_copy(saddr, &match->addr);
+ err = 0;
+ in6_ifa_put(match);
+ }
+
+ return err;
+}
+
+
+int ipv6_get_saddr(struct dst_entry *dst,
+ struct in6_addr *daddr, struct in6_addr *saddr)
+{
+ return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr);
+}
+
+
+int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
+{
+ struct inet6_dev *idev;
+ int err = -EADDRNOTAVAIL;
+
+ read_lock(&addrconf_lock);
+ if ((idev = __in6_dev_get(dev)) != NULL) {
+ struct inet6_ifaddr *ifp;
+
+ read_lock_bh(&idev->lock);
+ for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
+ if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
+ ipv6_addr_copy(addr, &ifp->addr);
+ err = 0;
+ break;
+ }
+ }
+ read_unlock_bh(&idev->lock);
+ }
+ read_unlock(&addrconf_lock);
+ return err;
+}
+
+static int ipv6_count_addresses(struct inet6_dev *idev)
+{
+ int cnt = 0;
+ struct inet6_ifaddr *ifp;
+
+ read_lock_bh(&idev->lock);
+ for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
+ cnt++;
+ read_unlock_bh(&idev->lock);
+ return cnt;
+}
+
+int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
+{
+ struct inet6_ifaddr * ifp;
+ u8 hash = ipv6_addr_hash(addr);
+
+ read_lock_bh(&addrconf_hash_lock);
+ for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
+ if (ipv6_addr_equal(&ifp->addr, addr) &&
+ !(ifp->flags&IFA_F_TENTATIVE)) {
+ if (dev == NULL || ifp->idev->dev == dev ||
+ !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
+ break;
+ }
+ }
+ read_unlock_bh(&addrconf_hash_lock);
+ return ifp != NULL;
+}
+
+static
+int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
+{
+ struct inet6_ifaddr * ifp;
+ u8 hash = ipv6_addr_hash(addr);
+
+ for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
+ if (ipv6_addr_equal(&ifp->addr, addr)) {
+ if (dev == NULL || ifp->idev->dev == dev)
+ break;
+ }
+ }
+ return ifp != NULL;
+}
+
+struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
+{
+ struct inet6_ifaddr * ifp;
+ u8 hash = ipv6_addr_hash(addr);
+
+ read_lock_bh(&addrconf_hash_lock);
+ for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
+ if (ipv6_addr_equal(&ifp->addr, addr)) {
+ if (dev == NULL || ifp->idev->dev == dev ||
+ !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
+ in6_ifa_hold(ifp);
+ break;
+ }
+ }
+ }
+ read_unlock_bh(&addrconf_hash_lock);
+
+ return ifp;
+}
+
+int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
+{
+ const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
+ const struct in6_addr *sk2_rcv_saddr6 = tcp_v6_rcv_saddr(sk2);
+ u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
+ u32 sk2_rcv_saddr = tcp_v4_rcv_saddr(sk2);
+ int sk_ipv6only = ipv6_only_sock(sk);
+ int sk2_ipv6only = tcp_v6_ipv6only(sk2);
+ int addr_type = ipv6_addr_type(sk_rcv_saddr6);
+ int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
+
+ if (!sk2_rcv_saddr && !sk_ipv6only)
+ return 1;
+
+ if (addr_type2 == IPV6_ADDR_ANY &&
+ !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
+ return 1;
+
+ if (addr_type == IPV6_ADDR_ANY &&
+ !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
+ return 1;
+
+ if (sk2_rcv_saddr6 &&
+ ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
+ return 1;
+
+ if (addr_type == IPV6_ADDR_MAPPED &&
+ !sk2_ipv6only &&
+ (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
+ return 1;
+
+ return 0;
+}
+
+/* Gets referenced address, destroys ifaddr */
+
+void addrconf_dad_failure(struct inet6_ifaddr *ifp)
+{
+ if (net_ratelimit())
+ printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
+ if (ifp->flags&IFA_F_PERMANENT) {
+ spin_lock_bh(&ifp->lock);
+ addrconf_del_timer(ifp);
+ ifp->flags |= IFA_F_TENTATIVE;
+ spin_unlock_bh(&ifp->lock);
+ in6_ifa_put(ifp);
+#ifdef CONFIG_IPV6_PRIVACY
+ } else if (ifp->flags&IFA_F_TEMPORARY) {
+ struct inet6_ifaddr *ifpub;
+ spin_lock_bh(&ifp->lock);
+ ifpub = ifp->ifpub;
+ if (ifpub) {
+ in6_ifa_hold(ifpub);
+ spin_unlock_bh(&ifp->lock);
+ ipv6_create_tempaddr(ifpub, ifp);
+ in6_ifa_put(ifpub);
+ } else {
+ spin_unlock_bh(&ifp->lock);
+ }
+ ipv6_del_addr(ifp);
+#endif
+ } else
+ ipv6_del_addr(ifp);
+}
+
+
+/* Join to solicited addr multicast group. */
+
+void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
+{
+ struct in6_addr maddr;
+
+ if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
+ return;
+
+ addrconf_addr_solict_mult(addr, &maddr);
+ ipv6_dev_mc_inc(dev, &maddr);
+}
+
+void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
+{
+ struct in6_addr maddr;
+
+ if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
+ return;
+
+ addrconf_addr_solict_mult(addr, &maddr);
+ __ipv6_dev_mc_dec(idev, &maddr);
+}
+
+void addrconf_join_anycast(struct inet6_ifaddr *ifp)
+{
+ struct in6_addr addr;
+ ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
+ if (ipv6_addr_any(&addr))
+ return;
+ ipv6_dev_ac_inc(ifp->idev->dev, &addr);
+}
+
+void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
+{
+ struct in6_addr addr;
+ ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
+ if (ipv6_addr_any(&addr))
+ return;
+ __ipv6_dev_ac_dec(ifp->idev, &addr);
+}
+
+static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
+{
+ switch (dev->type) {
+ case ARPHRD_ETHER:
+ case ARPHRD_FDDI:
+ case ARPHRD_IEEE802_TR:
+ if (dev->addr_len != ETH_ALEN)
+ return -1;
+ memcpy(eui, dev->dev_addr, 3);
+ memcpy(eui + 5, dev->dev_addr + 3, 3);
+
+ /*
+ * The zSeries OSA network cards can be shared among various
+ * OS instances, but the OSA cards have only one MAC address.
+ * This leads to duplicate address conflicts in conjunction
+ * with IPv6 if more than one instance uses the same card.
+ *
+ * The driver for these cards can deliver a unique 16-bit
+ * identifier for each instance sharing the same card. It is
+ * placed instead of 0xFFFE in the interface identifier. The
+ * "u" bit of the interface identifier is not inverted in this
+ * case. Hence the resulting interface identifier has local
+ * scope according to RFC2373.
+ */
+ if (dev->dev_id) {
+ eui[3] = (dev->dev_id >> 8) & 0xFF;
+ eui[4] = dev->dev_id & 0xFF;
+ } else {
+ eui[3] = 0xFF;
+ eui[4] = 0xFE;
+ eui[0] ^= 2;
+ }
+ return 0;
+ case ARPHRD_ARCNET:
+ /* XXX: inherit EUI-64 from other interface -- yoshfuji */
+ if (dev->addr_len != ARCNET_ALEN)
+ return -1;
+ memset(eui, 0, 7);
+ eui[7] = *(u8*)dev->dev_addr;
+ return 0;
+ case ARPHRD_INFINIBAND:
+ if (dev->addr_len != INFINIBAND_ALEN)
+ return -1;
+ memcpy(eui, dev->dev_addr + 12, 8);
+ eui[0] |= 2;
+ return 0;
+ }
+ return -1;
+}
+
+static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
+{
+ int err = -1;
+ struct inet6_ifaddr *ifp;
+
+ read_lock_bh(&idev->lock);
+ for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
+ if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
+ memcpy(eui, ifp->addr.s6_addr+8, 8);
+ err = 0;
+ break;
+ }
+ }
+ read_unlock_bh(&idev->lock);
+ return err;
+}
+
+#ifdef CONFIG_IPV6_PRIVACY
+/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
+static int __ipv6_regen_rndid(struct inet6_dev *idev)
+{
+ struct net_device *dev;
+ struct scatterlist sg[2];
+
+ sg[0].page = virt_to_page(idev->entropy);
+ sg[0].offset = offset_in_page(idev->entropy);
+ sg[0].length = 8;
+ sg[1].page = virt_to_page(idev->work_eui64);
+ sg[1].offset = offset_in_page(idev->work_eui64);
+ sg[1].length = 8;
+
+ dev = idev->dev;
+
+ if (ipv6_generate_eui64(idev->work_eui64, dev)) {
+ printk(KERN_INFO
+ "__ipv6_regen_rndid(idev=%p): cannot get EUI64 identifier; use random bytes.\n",
+ idev);
+ get_random_bytes(idev->work_eui64, sizeof(idev->work_eui64));
+ }
+regen:
+ spin_lock(&md5_tfm_lock);
+ if (unlikely(md5_tfm == NULL)) {
+ spin_unlock(&md5_tfm_lock);
+ return -1;
+ }
+ crypto_digest_init(md5_tfm);
+ crypto_digest_update(md5_tfm, sg, 2);
+ crypto_digest_final(md5_tfm, idev->work_digest);
+ spin_unlock(&md5_tfm_lock);
+
+ memcpy(idev->rndid, &idev->work_digest[0], 8);
+ idev->rndid[0] &= ~0x02;
+ memcpy(idev->entropy, &idev->work_digest[8], 8);
+
+ /*
+ * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
+ * check if generated address is not inappropriate
+ *
+ * - Reserved subnet anycast (RFC 2526)
+ * 11111101 11....11 1xxxxxxx
+ * - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
+ * 00-00-5E-FE-xx-xx-xx-xx
+ * - value 0
+ * - XXX: already assigned to an address on the device
+ */
+ if (idev->rndid[0] == 0xfd &&
+ (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
+ (idev->rndid[7]&0x80))
+ goto regen;
+ if ((idev->rndid[0]|idev->rndid[1]) == 0) {
+ if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
+ goto regen;
+ if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
+ goto regen;
+ }
+
+ return 0;
+}
+
+static void ipv6_regen_rndid(unsigned long data)
+{
+ struct inet6_dev *idev = (struct inet6_dev *) data;
+ unsigned long expires;
+
+ read_lock_bh(&addrconf_lock);
+ write_lock_bh(&idev->lock);
+
+ if (idev->dead)
+ goto out;
+
+ if (__ipv6_regen_rndid(idev) < 0)
+ goto out;
+
+ expires = jiffies +
+ idev->cnf.temp_prefered_lft * HZ -
+ idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
+ if (time_before(expires, jiffies)) {
+ printk(KERN_WARNING
+ "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
+ idev->dev->name);
+ goto out;
+ }
+
+ if (!mod_timer(&idev->regen_timer, expires))
+ in6_dev_hold(idev);
+
+out:
+ write_unlock_bh(&idev->lock);
+ read_unlock_bh(&addrconf_lock);
+ in6_dev_put(idev);
+}
+
+static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
+ int ret = 0;
+
+ if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
+ ret = __ipv6_regen_rndid(idev);
+ return ret;
+}
+#endif
+
+/*
+ * Add prefix route.
+ */
+
+static void
+addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
+ unsigned long expires, unsigned flags)
+{
+ struct in6_rtmsg rtmsg;
+
+ memset(&rtmsg, 0, sizeof(rtmsg));
+ ipv6_addr_copy(&rtmsg.rtmsg_dst, pfx);
+ rtmsg.rtmsg_dst_len = plen;
+ rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
+ rtmsg.rtmsg_ifindex = dev->ifindex;
+ rtmsg.rtmsg_info = expires;
+ rtmsg.rtmsg_flags = RTF_UP|flags;
+ rtmsg.rtmsg_type = RTMSG_NEWROUTE;
+
+ /* Prevent useless cloning on PtP SIT.
+ This thing is done here expecting that the whole
+ class of non-broadcast devices need not cloning.
+ */
+ if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT))
+ rtmsg.rtmsg_flags |= RTF_NONEXTHOP;
+
+ ip6_route_add(&rtmsg, NULL, NULL);
+}
+
+/* Create "default" multicast route to the interface */
+
+static void addrconf_add_mroute(struct net_device *dev)
+{
+ struct in6_rtmsg rtmsg;
+
+ memset(&rtmsg, 0, sizeof(rtmsg));
+ ipv6_addr_set(&rtmsg.rtmsg_dst,
+ htonl(0xFF000000), 0, 0, 0);
+ rtmsg.rtmsg_dst_len = 8;
+ rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
+ rtmsg.rtmsg_ifindex = dev->ifindex;
+ rtmsg.rtmsg_flags = RTF_UP;
+ rtmsg.rtmsg_type = RTMSG_NEWROUTE;
+ ip6_route_add(&rtmsg, NULL, NULL);
+}
+
+static void sit_route_add(struct net_device *dev)
+{
+ struct in6_rtmsg rtmsg;
+
+ memset(&rtmsg, 0, sizeof(rtmsg));
+
+ rtmsg.rtmsg_type = RTMSG_NEWROUTE;
+ rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
+
+ /* prefix length - 96 bits "::d.d.d.d" */
+ rtmsg.rtmsg_dst_len = 96;
+ rtmsg.rtmsg_flags = RTF_UP|RTF_NONEXTHOP;
+ rtmsg.rtmsg_ifindex = dev->ifindex;
+
+ ip6_route_add(&rtmsg, NULL, NULL);
+}
+
+static void addrconf_add_lroute(struct net_device *dev)
+{
+ struct in6_addr addr;
+
+ ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
+ addrconf_prefix_route(&addr, 64, dev, 0, 0);
+}
+
+static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
+{
+ struct inet6_dev *idev;
+
+ ASSERT_RTNL();
+
+ if ((idev = ipv6_find_idev(dev)) == NULL)
+ return NULL;
+
+ /* Add default multicast route */
+ addrconf_add_mroute(dev);
+
+ /* Add link local route */
+ addrconf_add_lroute(dev);
+ return idev;
+}
+
+void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
+{
+ struct prefix_info *pinfo;
+ __u32 valid_lft;
+ __u32 prefered_lft;
+ int addr_type;
+ unsigned long rt_expires;
+ struct inet6_dev *in6_dev;
+
+ pinfo = (struct prefix_info *) opt;
+
+ if (len < sizeof(struct prefix_info)) {
+ ADBG(("addrconf: prefix option too short\n"));
+ return;
+ }
+
+ /*
+ * Validation checks ([ADDRCONF], page 19)
+ */
+
+ addr_type = ipv6_addr_type(&pinfo->prefix);
+
+ if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
+ return;
+
+ valid_lft = ntohl(pinfo->valid);
+ prefered_lft = ntohl(pinfo->prefered);
+
+ if (prefered_lft > valid_lft) {
+ if (net_ratelimit())
+ printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
+ return;
+ }
+
+ in6_dev = in6_dev_get(dev);
+
+ if (in6_dev == NULL) {
+ if (net_ratelimit())
+ printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
+ return;
+ }
+
+ /*
+ * Two things going on here:
+ * 1) Add routes for on-link prefixes
+ * 2) Configure prefixes with the auto flag set
+ */
+
+ /* Avoid arithmetic overflow. Really, we could
+ save rt_expires in seconds, likely valid_lft,
+ but it would require division in fib gc, that it
+ not good.
+ */
+ if (valid_lft >= 0x7FFFFFFF/HZ)
+ rt_expires = 0;
+ else
+ rt_expires = jiffies + valid_lft * HZ;
+
+ if (pinfo->onlink) {
+ struct rt6_info *rt;
+ rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);
+
+ if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
+ if (rt->rt6i_flags&RTF_EXPIRES) {
+ if (valid_lft == 0) {
+ ip6_del_rt(rt, NULL, NULL);
+ rt = NULL;
+ } else {
+ rt->rt6i_expires = rt_expires;
+ }
+ }
+ } else if (valid_lft) {
+ addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
+ dev, rt_expires, RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
+ }
+ if (rt)
+ dst_release(&rt->u.dst);
+ }
+
+ /* Try to figure out our local address for this prefix */
+
+ if (pinfo->autoconf && in6_dev->cnf.autoconf) {
+ struct inet6_ifaddr * ifp;
+ struct in6_addr addr;
+ int create = 0, update_lft = 0;
+
+ if (pinfo->prefix_len == 64) {
+ memcpy(&addr, &pinfo->prefix, 8);
+ if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
+ ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
+ in6_dev_put(in6_dev);
+ return;
+ }
+ goto ok;
+ }
+ if (net_ratelimit())
+ printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
+ pinfo->prefix_len);
+ in6_dev_put(in6_dev);
+ return;
+
+ok:
+
+ ifp = ipv6_get_ifaddr(&addr, dev, 1);
+
+ if (ifp == NULL && valid_lft) {
+ int max_addresses = in6_dev->cnf.max_addresses;
+
+ /* Do not allow to create too much of autoconfigured
+ * addresses; this would be too easy way to crash kernel.
+ */
+ if (!max_addresses ||
+ ipv6_count_addresses(in6_dev) < max_addresses)
+ ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
+ addr_type&IPV6_ADDR_SCOPE_MASK, 0);
+
+ if (!ifp || IS_ERR(ifp)) {
+ in6_dev_put(in6_dev);
+ return;
+ }
+
+ update_lft = create = 1;
+ ifp->cstamp = jiffies;
+ addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
+ }
+
+ if (ifp) {
+ int flags;
+ unsigned long now;
+#ifdef CONFIG_IPV6_PRIVACY
+ struct inet6_ifaddr *ift;
+#endif
+ u32 stored_lft;
+
+ /* update lifetime (RFC2462 5.5.3 e) */
+ spin_lock(&ifp->lock);
+ now = jiffies;
+ if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
+ stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
+ else
+ stored_lft = 0;
+ if (!update_lft && stored_lft) {
+ if (valid_lft > MIN_VALID_LIFETIME ||
+ valid_lft > stored_lft)
+ update_lft = 1;
+ else if (stored_lft <= MIN_VALID_LIFETIME) {
+ /* valid_lft <= stored_lft is always true */
+ /* XXX: IPsec */
+ update_lft = 0;
+ } else {
+ valid_lft = MIN_VALID_LIFETIME;
+ if (valid_lft < prefered_lft)
+ prefered_lft = valid_lft;
+ update_lft = 1;
+ }
+ }
+
+ if (update_lft) {
+ ifp->valid_lft = valid_lft;
+ ifp->prefered_lft = prefered_lft;
+ ifp->tstamp = now;
+ flags = ifp->flags;
+ ifp->flags &= ~IFA_F_DEPRECATED;
+ spin_unlock(&ifp->lock);
+
+ if (!(flags&IFA_F_TENTATIVE))
+ ipv6_ifa_notify(0, ifp);
+ } else
+ spin_unlock(&ifp->lock);
+
+#ifdef CONFIG_IPV6_PRIVACY
+ read_lock_bh(&in6_dev->lock);
+ /* update all temporary addresses in the list */
+ for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
+ /*
+ * When adjusting the lifetimes of an existing
+ * temporary address, only lower the lifetimes.
+ * Implementations must not increase the
+ * lifetimes of an existing temporary address
+ * when processing a Prefix Information Option.
+ */
+ spin_lock(&ift->lock);
+ flags = ift->flags;
+ if (ift->valid_lft > valid_lft &&
+ ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
+ ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
+ if (ift->prefered_lft > prefered_lft &&
+ ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
+ ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
+ spin_unlock(&ift->lock);
+ if (!(flags&IFA_F_TENTATIVE))
+ ipv6_ifa_notify(0, ift);
+ }
+
+ if (create && in6_dev->cnf.use_tempaddr > 0) {
+ /*
+ * When a new public address is created as described in [ADDRCONF],
+ * also create a new temporary address.
+ */
+ read_unlock_bh(&in6_dev->lock);
+ ipv6_create_tempaddr(ifp, NULL);
+ } else {
+ read_unlock_bh(&in6_dev->lock);
+ }
+#endif
+ in6_ifa_put(ifp);
+ addrconf_verify(0);
+ }
+ }
+ inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
+ in6_dev_put(in6_dev);
+}
+
+/*
+ * Set destination address.
+ * Special case for SIT interfaces where we create a new "virtual"
+ * device.
+ */
+int addrconf_set_dstaddr(void __user *arg)
+{
+ struct in6_ifreq ireq;
+ struct net_device *dev;
+ int err = -EINVAL;
+
+ rtnl_lock();
+
+ err = -EFAULT;
+ if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
+ goto err_exit;
+
+ dev = __dev_get_by_index(ireq.ifr6_ifindex);
+
+ err = -ENODEV;
+ if (dev == NULL)
+ goto err_exit;
+
+ if (dev->type == ARPHRD_SIT) {
+ struct ifreq ifr;
+ mm_segment_t oldfs;
+ struct ip_tunnel_parm p;
+
+ err = -EADDRNOTAVAIL;
+ if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
+ goto err_exit;
+
+ memset(&p, 0, sizeof(p));
+ p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
+ p.iph.saddr = 0;
+ p.iph.version = 4;
+ p.iph.ihl = 5;
+ p.iph.protocol = IPPROTO_IPV6;
+ p.iph.ttl = 64;
+ ifr.ifr_ifru.ifru_data = (void __user *)&p;
+
+ oldfs = get_fs(); set_fs(KERNEL_DS);
+ err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
+ set_fs(oldfs);
+
+ if (err == 0) {
+ err = -ENOBUFS;
+ if ((dev = __dev_get_by_name(p.name)) == NULL)
+ goto err_exit;
+ err = dev_open(dev);
+ }
+ }
+
+err_exit:
+ rtnl_unlock();
+ return err;
+}
+
+/*
+ * Manual configuration of address on an interface
+ */
+static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen)
+{
+ struct inet6_ifaddr *ifp;
+ struct inet6_dev *idev;
+ struct net_device *dev;
+ int scope;
+
+ ASSERT_RTNL();
+
+ if ((dev = __dev_get_by_index(ifindex)) == NULL)
+ return -ENODEV;
+
+ if (!(dev->flags&IFF_UP))
+ return -ENETDOWN;
+
+ if ((idev = addrconf_add_dev(dev)) == NULL)
+ return -ENOBUFS;
+
+ scope = ipv6_addr_scope(pfx);
+
+ ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT);
+ if (!IS_ERR(ifp)) {
+ addrconf_dad_start(ifp, 0);
+ in6_ifa_put(ifp);
+ return 0;
+ }
+
+ return PTR_ERR(ifp);
+}
+
+static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
+{
+ struct inet6_ifaddr *ifp;
+ struct inet6_dev *idev;
+ struct net_device *dev;
+
+ if ((dev = __dev_get_by_index(ifindex)) == NULL)
+ return -ENODEV;
+
+ if ((idev = __in6_dev_get(dev)) == NULL)
+ return -ENXIO;
+
+ read_lock_bh(&idev->lock);
+ for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
+ if (ifp->prefix_len == plen &&
+ ipv6_addr_equal(pfx, &ifp->addr)) {
+ in6_ifa_hold(ifp);
+ read_unlock_bh(&idev->lock);
+
+ ipv6_del_addr(ifp);
+
+ /* If the last address is deleted administratively,
+ disable IPv6 on this interface.
+ */
+ if (idev->addr_list == NULL)
+ addrconf_ifdown(idev->dev, 1);
+ return 0;
+ }
+ }
+ read_unlock_bh(&idev->lock);
+ return -EADDRNOTAVAIL;
+}
+
+
+int addrconf_add_ifaddr(void __user *arg)
+{
+ struct in6_ifreq ireq;
+ int err;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
+ return -EFAULT;
+
+ rtnl_lock();
+ err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
+ rtnl_unlock();
+ return err;
+}
+
+int addrconf_del_ifaddr(void __user *arg)
+{
+ struct in6_ifreq ireq;
+ int err;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
+ return -EFAULT;
+
+ rtnl_lock();
+ err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
+ rtnl_unlock();
+ return err;
+}
+
+static void sit_add_v4_addrs(struct inet6_dev *idev)
+{
+ struct inet6_ifaddr * ifp;
+ struct in6_addr addr;
+ struct net_device *dev;
+ int scope;
+
+ ASSERT_RTNL();
+
+ memset(&addr, 0, sizeof(struct in6_addr));
+ memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
+
+ if (idev->dev->flags&IFF_POINTOPOINT) {
+ addr.s6_addr32[0] = htonl(0xfe800000);
+ scope = IFA_LINK;
+ } else {
+ scope = IPV6_ADDR_COMPATv4;
+ }
+
+ if (addr.s6_addr32[3]) {
+ ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
+ if (!IS_ERR(ifp)) {
+ spin_lock_bh(&ifp->lock);
+ ifp->flags &= ~IFA_F_TENTATIVE;
+ spin_unlock_bh(&ifp->lock);
+ ipv6_ifa_notify(RTM_NEWADDR, ifp);
+ in6_ifa_put(ifp);
+ }
+ return;
+ }
+
+ for (dev = dev_base; dev != NULL; dev = dev->next) {
+ struct in_device * in_dev = __in_dev_get(dev);
+ if (in_dev && (dev->flags & IFF_UP)) {
+ struct in_ifaddr * ifa;
+
+ int flag = scope;
+
+ for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
+ int plen;
+
+ addr.s6_addr32[3] = ifa->ifa_local;
+
+ if (ifa->ifa_scope == RT_SCOPE_LINK)
+ continue;
+ if (ifa->ifa_scope >= RT_SCOPE_HOST) {
+ if (idev->dev->flags&IFF_POINTOPOINT)
+ continue;
+ flag |= IFA_HOST;
+ }
+ if (idev->dev->flags&IFF_POINTOPOINT)
+ plen = 64;
+ else
+ plen = 96;
+
+ ifp = ipv6_add_addr(idev, &addr, plen, flag,
+ IFA_F_PERMANENT);
+ if (!IS_ERR(ifp)) {
+ spin_lock_bh(&ifp->lock);
+ ifp->flags &= ~IFA_F_TENTATIVE;
+ spin_unlock_bh(&ifp->lock);
+ ipv6_ifa_notify(RTM_NEWADDR, ifp);
+ in6_ifa_put(ifp);
+ }
+ }
+ }
+ }
+}
+
+static void init_loopback(struct net_device *dev)
+{
+ struct inet6_dev *idev;
+ struct inet6_ifaddr * ifp;
+
+ /* ::1 */
+
+ ASSERT_RTNL();
+
+ if ((idev = ipv6_find_idev(dev)) == NULL) {
+ printk(KERN_DEBUG "init loopback: add_dev failed\n");
+ return;
+ }
+
+ ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
+ if (!IS_ERR(ifp)) {
+ spin_lock_bh(&ifp->lock);
+ ifp->flags &= ~IFA_F_TENTATIVE;
+ spin_unlock_bh(&ifp->lock);
+ ipv6_ifa_notify(RTM_NEWADDR, ifp);
+ in6_ifa_put(ifp);
+ }
+}
+
+static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
+{
+ struct inet6_ifaddr * ifp;
+
+ ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
+ if (!IS_ERR(ifp)) {
+ addrconf_dad_start(ifp, 0);
+ in6_ifa_put(ifp);
+ }
+}
+
+static void addrconf_dev_config(struct net_device *dev)
+{
+ struct in6_addr addr;
+ struct inet6_dev * idev;
+
+ ASSERT_RTNL();
+
+ if ((dev->type != ARPHRD_ETHER) &&
+ (dev->type != ARPHRD_FDDI) &&
+ (dev->type != ARPHRD_IEEE802_TR) &&
+ (dev->type != ARPHRD_ARCNET) &&
+ (dev->type != ARPHRD_INFINIBAND)) {
+ /* Alas, we support only Ethernet autoconfiguration. */
+ return;
+ }
+
+ idev = addrconf_add_dev(dev);
+ if (idev == NULL)
+ return;
+
+ memset(&addr, 0, sizeof(struct in6_addr));
+ addr.s6_addr32[0] = htonl(0xFE800000);
+
+ if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
+ addrconf_add_linklocal(idev, &addr);
+}
+
+static void addrconf_sit_config(struct net_device *dev)
+{
+ struct inet6_dev *idev;
+
+ ASSERT_RTNL();
+
+ /*
+ * Configure the tunnel with one of our IPv4
+ * addresses... we should configure all of
+ * our v4 addrs in the tunnel
+ */
+
+ if ((idev = ipv6_find_idev(dev)) == NULL) {
+ printk(KERN_DEBUG "init sit: add_dev failed\n");
+ return;
+ }
+
+ sit_add_v4_addrs(idev);
+
+ if (dev->flags&IFF_POINTOPOINT) {
+ addrconf_add_mroute(dev);
+ addrconf_add_lroute(dev);
+ } else
+ sit_route_add(dev);
+}
+
+static inline int
+ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
+{
+ struct in6_addr lladdr;
+
+ if (!ipv6_get_lladdr(link_dev, &lladdr)) {
+ addrconf_add_linklocal(idev, &lladdr);
+ return 0;
+ }
+ return -1;
+}
+
+static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
+{
+ struct net_device *link_dev;
+
+ /* first try to inherit the link-local address from the link device */
+ if (idev->dev->iflink &&
+ (link_dev = __dev_get_by_index(idev->dev->iflink))) {
+ if (!ipv6_inherit_linklocal(idev, link_dev))
+ return;
+ }
+ /* then try to inherit it from any device */
+ for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
+ if (!ipv6_inherit_linklocal(idev, link_dev))
+ return;
+ }
+ printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
+}
+
+/*
+ * Autoconfigure tunnel with a link-local address so routing protocols,
+ * DHCPv6, MLD etc. can be run over the virtual link
+ */
+
+static void addrconf_ip6_tnl_config(struct net_device *dev)
+{
+ struct inet6_dev *idev;
+
+ ASSERT_RTNL();
+
+ if ((idev = addrconf_add_dev(dev)) == NULL) {
+ printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
+ return;
+ }
+ ip6_tnl_add_linklocal(idev);
+ addrconf_add_mroute(dev);
+}
+
+static int addrconf_notify(struct notifier_block *this, unsigned long event,
+ void * data)
+{
+ struct net_device *dev = (struct net_device *) data;
+ struct inet6_dev *idev = __in6_dev_get(dev);
+
+ switch(event) {
+ case NETDEV_UP:
+ switch(dev->type) {
+ case ARPHRD_SIT:
+ addrconf_sit_config(dev);
+ break;
+ case ARPHRD_TUNNEL6:
+ addrconf_ip6_tnl_config(dev);
+ break;
+ case ARPHRD_LOOPBACK:
+ init_loopback(dev);
+ break;
+
+ default:
+ addrconf_dev_config(dev);
+ break;
+ };
+ if (idev) {
+ /* If the MTU changed during the interface down, when the
+ interface up, the changed MTU must be reflected in the
+ idev as well as routers.
+ */
+ if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
+ rt6_mtu_change(dev, dev->mtu);
+ idev->cnf.mtu6 = dev->mtu;
+ }
+ idev->tstamp = jiffies;
+ inet6_ifinfo_notify(RTM_NEWLINK, idev);
+ /* If the changed mtu during down is lower than IPV6_MIN_MTU
+ stop IPv6 on this interface.
+ */
+ if (dev->mtu < IPV6_MIN_MTU)
+ addrconf_ifdown(dev, event != NETDEV_DOWN);
+ }
+ break;
+
+ case NETDEV_CHANGEMTU:
+ if ( idev && dev->mtu >= IPV6_MIN_MTU) {
+ rt6_mtu_change(dev, dev->mtu);
+ idev->cnf.mtu6 = dev->mtu;
+ break;
+ }
+
+ /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
+
+ case NETDEV_DOWN:
+ case NETDEV_UNREGISTER:
+ /*
+ * Remove all addresses from this interface.
+ */
+ addrconf_ifdown(dev, event != NETDEV_DOWN);
+ break;
+ case NETDEV_CHANGE:
+ break;
+ case NETDEV_CHANGENAME:
+#ifdef CONFIG_SYSCTL
+ if (idev) {
+ addrconf_sysctl_unregister(&idev->cnf);
+ neigh_sysctl_unregister(idev->nd_parms);
+ neigh_sysctl_register(dev, idev->nd_parms,
+ NET_IPV6, NET_IPV6_NEIGH, "ipv6",
+ &ndisc_ifinfo_sysctl_change,
+ NULL);
+ addrconf_sysctl_register(idev, &idev->cnf);
+ }
+#endif
+ break;
+ };
+
+ return NOTIFY_OK;
+}
+
+/*
+ * addrconf module should be notified of a device going up
+ */
+static struct notifier_block ipv6_dev_notf = {
+ .notifier_call = addrconf_notify,
+ .priority = 0
+};
+
+static int addrconf_ifdown(struct net_device *dev, int how)
+{
+ struct inet6_dev *idev;
+ struct inet6_ifaddr *ifa, **bifa;
+ int i;
+
+ ASSERT_RTNL();
+
+ if (dev == &loopback_dev && how == 1)
+ how = 0;
+
+ rt6_ifdown(dev);
+ neigh_ifdown(&nd_tbl, dev);
+
+ idev = __in6_dev_get(dev);
+ if (idev == NULL)
+ return -ENODEV;
+
+ /* Step 1: remove reference to ipv6 device from parent device.
+ Do not dev_put!
+ */
+ if (how == 1) {
+ write_lock_bh(&addrconf_lock);
+ dev->ip6_ptr = NULL;
+ idev->dead = 1;
+ write_unlock_bh(&addrconf_lock);
+
+ /* Step 1.5: remove snmp6 entry */
+ snmp6_unregister_dev(idev);
+
+ }
+
+ /* Step 2: clear hash table */
+ for (i=0; i<IN6_ADDR_HSIZE; i++) {
+ bifa = &inet6_addr_lst[i];
+
+ write_lock_bh(&addrconf_hash_lock);
+ while ((ifa = *bifa) != NULL) {
+ if (ifa->idev == idev) {
+ *bifa = ifa->lst_next;
+ ifa->lst_next = NULL;
+ addrconf_del_timer(ifa);
+ in6_ifa_put(ifa);
+ continue;
+ }
+ bifa = &ifa->lst_next;
+ }
+ write_unlock_bh(&addrconf_hash_lock);
+ }
+
+ write_lock_bh(&idev->lock);
+
+ /* Step 3: clear flags for stateless addrconf */
+ if (how != 1)
+ idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD);
+
+ /* Step 4: clear address list */
+#ifdef CONFIG_IPV6_PRIVACY
+ if (how == 1 && del_timer(&idev->regen_timer))
+ in6_dev_put(idev);
+
+ /* clear tempaddr list */
+ while ((ifa = idev->tempaddr_list) != NULL) {
+ idev->tempaddr_list = ifa->tmp_next;
+ ifa->tmp_next = NULL;
+ ifa->dead = 1;
+ write_unlock_bh(&idev->lock);
+ spin_lock_bh(&ifa->lock);
+
+ if (ifa->ifpub) {
+ in6_ifa_put(ifa->ifpub);
+ ifa->ifpub = NULL;
+ }
+ spin_unlock_bh(&ifa->lock);
+ in6_ifa_put(ifa);
+ write_lock_bh(&idev->lock);
+ }
+#endif
+ while ((ifa = idev->addr_list) != NULL) {
+ idev->addr_list = ifa->if_next;
+ ifa->if_next = NULL;
+ ifa->dead = 1;
+ addrconf_del_timer(ifa);
+ write_unlock_bh(&idev->lock);
+
+ __ipv6_ifa_notify(RTM_DELADDR, ifa);
+ in6_ifa_put(ifa);
+
+ write_lock_bh(&idev->lock);
+ }
+ write_unlock_bh(&idev->lock);
+
+ /* Step 5: Discard multicast list */
+
+ if (how == 1)
+ ipv6_mc_destroy_dev(idev);
+ else
+ ipv6_mc_down(idev);
+
+ /* Step 5: netlink notification of this interface */
+ idev->tstamp = jiffies;
+ inet6_ifinfo_notify(RTM_NEWLINK, idev);
+
+ /* Shot the device (if unregistered) */
+
+ if (how == 1) {
+#ifdef CONFIG_SYSCTL
+ addrconf_sysctl_unregister(&idev->cnf);
+ neigh_sysctl_unregister(idev->nd_parms);
+#endif
+ neigh_parms_release(&nd_tbl, idev->nd_parms);
+ neigh_ifdown(&nd_tbl, dev);
+ in6_dev_put(idev);
+ }
+ return 0;
+}
+
+static void addrconf_rs_timer(unsigned long data)
+{
+ struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
+
+ if (ifp->idev->cnf.forwarding)
+ goto out;
+
+ if (ifp->idev->if_flags & IF_RA_RCVD) {
+ /*
+ * Announcement received after solicitation
+ * was sent
+ */
+ goto out;
+ }
+
+ spin_lock(&ifp->lock);
+ if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
+ struct in6_addr all_routers;
+
+ /* The wait after the last probe can be shorter */
+ addrconf_mod_timer(ifp, AC_RS,
+ (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
+ ifp->idev->cnf.rtr_solicit_delay :
+ ifp->idev->cnf.rtr_solicit_interval);
+ spin_unlock(&ifp->lock);
+
+ ipv6_addr_all_routers(&all_routers);
+
+ ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
+ } else {
+ spin_unlock(&ifp->lock);
+ /*
+ * Note: we do not support deprecated "all on-link"
+ * assumption any longer.
+ */
+ printk(KERN_DEBUG "%s: no IPv6 routers present\n",
+ ifp->idev->dev->name);
+ }
+
+out:
+ in6_ifa_put(ifp);
+}
+
+/*
+ * Duplicate Address Detection
+ */
+static void addrconf_dad_start(struct inet6_ifaddr *ifp, int flags)
+{
+ struct inet6_dev *idev = ifp->idev;
+ struct net_device *dev = idev->dev;
+ unsigned long rand_num;
+
+ addrconf_join_solict(dev, &ifp->addr);
+
+ if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT))
+ addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0,
+ flags);
+
+ net_srandom(ifp->addr.s6_addr32[3]);
+ rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
+
+ read_lock_bh(&idev->lock);
+ if (ifp->dead)
+ goto out;
+ spin_lock_bh(&ifp->lock);
+
+ if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
+ !(ifp->flags&IFA_F_TENTATIVE)) {
+ ifp->flags &= ~IFA_F_TENTATIVE;
+ spin_unlock_bh(&ifp->lock);
+ read_unlock_bh(&idev->lock);
+
+ addrconf_dad_completed(ifp);
+ return;
+ }
+
+ ifp->probes = idev->cnf.dad_transmits;
+ addrconf_mod_timer(ifp, AC_DAD, rand_num);
+
+ spin_unlock_bh(&ifp->lock);
+out:
+ read_unlock_bh(&idev->lock);
+}
+
+static void addrconf_dad_timer(unsigned long data)
+{
+ struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
+ struct inet6_dev *idev = ifp->idev;
+ struct in6_addr unspec;
+ struct in6_addr mcaddr;
+
+ read_lock_bh(&idev->lock);
+ if (idev->dead) {
+ read_unlock_bh(&idev->lock);
+ goto out;
+ }
+ spin_lock_bh(&ifp->lock);
+ if (ifp->probes == 0) {
+ /*
+ * DAD was successful
+ */
+
+ ifp->flags &= ~IFA_F_TENTATIVE;
+ spin_unlock_bh(&ifp->lock);
+ read_unlock_bh(&idev->lock);
+
+ addrconf_dad_completed(ifp);
+
+ goto out;
+ }
+
+ ifp->probes--;
+ addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
+ spin_unlock_bh(&ifp->lock);
+ read_unlock_bh(&idev->lock);
+
+ /* send a neighbour solicitation for our addr */
+ memset(&unspec, 0, sizeof(unspec));
+ addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
+ ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
+out:
+ in6_ifa_put(ifp);
+}
+
+static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
+{
+ struct net_device * dev = ifp->idev->dev;
+
+ /*
+ * Configure the address for reception. Now it is valid.
+ */
+
+ ipv6_ifa_notify(RTM_NEWADDR, ifp);
+
+ /* If added prefix is link local and forwarding is off,
+ start sending router solicitations.
+ */
+
+ if (ifp->idev->cnf.forwarding == 0 &&
+ ifp->idev->cnf.rtr_solicits > 0 &&
+ (dev->flags&IFF_LOOPBACK) == 0 &&
+ (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
+ struct in6_addr all_routers;
+
+ ipv6_addr_all_routers(&all_routers);
+
+ /*
+ * If a host as already performed a random delay
+ * [...] as part of DAD [...] there is no need
+ * to delay again before sending the first RS
+ */
+ ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
+
+ spin_lock_bh(&ifp->lock);
+ ifp->probes = 1;
+ ifp->idev->if_flags |= IF_RS_SENT;
+ addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
+ spin_unlock_bh(&ifp->lock);
+ }
+}
+
+#ifdef CONFIG_PROC_FS
+struct if6_iter_state {
+ int bucket;
+};
+
+static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
+{
+ struct inet6_ifaddr *ifa = NULL;
+ struct if6_iter_state *state = seq->private;
+
+ for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
+ ifa = inet6_addr_lst[state->bucket];
+ if (ifa)
+ break;
+ }
+ return ifa;
+}
+
+static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
+{
+ struct if6_iter_state *state = seq->private;
+
+ ifa = ifa->lst_next;
+try_again:
+ if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
+ ifa = inet6_addr_lst[state->bucket];
+ goto try_again;
+ }
+ return ifa;
+}
+
+static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
+{
+ struct inet6_ifaddr *ifa = if6_get_first(seq);
+
+ if (ifa)
+ while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
+ --pos;
+ return pos ? NULL : ifa;
+}
+
+static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ read_lock_bh(&addrconf_hash_lock);
+ return if6_get_idx(seq, *pos);
+}
+
+static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct inet6_ifaddr *ifa;
+
+ ifa = if6_get_next(seq, v);
+ ++*pos;
+ return ifa;
+}
+
+static void if6_seq_stop(struct seq_file *seq, void *v)
+{
+ read_unlock_bh(&addrconf_hash_lock);
+}
+
+static int if6_seq_show(struct seq_file *seq, void *v)
+{
+ struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
+ seq_printf(seq,
+ "%04x%04x%04x%04x%04x%04x%04x%04x %02x %02x %02x %02x %8s\n",
+ NIP6(ifp->addr),
+ ifp->idev->dev->ifindex,
+ ifp->prefix_len,
+ ifp->scope,
+ ifp->flags,
+ ifp->idev->dev->name);
+ return 0;
+}
+
+static struct seq_operations if6_seq_ops = {
+ .start = if6_seq_start,
+ .next = if6_seq_next,
+ .show = if6_seq_show,
+ .stop = if6_seq_stop,
+};
+
+static int if6_seq_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ int rc = -ENOMEM;
+ struct if6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
+
+ if (!s)
+ goto out;
+ memset(s, 0, sizeof(*s));
+
+ rc = seq_open(file, &if6_seq_ops);
+ if (rc)
+ goto out_kfree;
+
+ seq = file->private_data;
+ seq->private = s;
+out:
+ return rc;
+out_kfree:
+ kfree(s);
+ goto out;
+}
+
+static struct file_operations if6_fops = {
+ .owner = THIS_MODULE,
+ .open = if6_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+
+int __init if6_proc_init(void)
+{
+ if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
+ return -ENOMEM;
+ return 0;
+}
+
+void if6_proc_exit(void)
+{
+ proc_net_remove("if_inet6");
+}
+#endif /* CONFIG_PROC_FS */
+
+/*
+ * Periodic address status verification
+ */
+
+static void addrconf_verify(unsigned long foo)
+{
+ struct inet6_ifaddr *ifp;
+ unsigned long now, next;
+ int i;
+
+ spin_lock_bh(&addrconf_verify_lock);
+ now = jiffies;
+ next = now + ADDR_CHECK_FREQUENCY;
+
+ del_timer(&addr_chk_timer);
+
+ for (i=0; i < IN6_ADDR_HSIZE; i++) {
+
+restart:
+ write_lock(&addrconf_hash_lock);
+ for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
+ unsigned long age;
+#ifdef CONFIG_IPV6_PRIVACY
+ unsigned long regen_advance;
+#endif
+
+ if (ifp->flags & IFA_F_PERMANENT)
+ continue;
+
+ spin_lock(&ifp->lock);
+ age = (now - ifp->tstamp) / HZ;
+
+#ifdef CONFIG_IPV6_PRIVACY
+ regen_advance = ifp->idev->cnf.regen_max_retry *
+ ifp->idev->cnf.dad_transmits *
+ ifp->idev->nd_parms->retrans_time / HZ;
+#endif
+
+ if (age >= ifp->valid_lft) {
+ spin_unlock(&ifp->lock);
+ in6_ifa_hold(ifp);
+ write_unlock(&addrconf_hash_lock);
+ ipv6_del_addr(ifp);
+ goto restart;
+ } else if (age >= ifp->prefered_lft) {
+ /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
+ int deprecate = 0;
+
+ if (!(ifp->flags&IFA_F_DEPRECATED)) {
+ deprecate = 1;
+ ifp->flags |= IFA_F_DEPRECATED;
+ }
+
+ if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
+ next = ifp->tstamp + ifp->valid_lft * HZ;
+
+ spin_unlock(&ifp->lock);
+
+ if (deprecate) {
+ in6_ifa_hold(ifp);
+ write_unlock(&addrconf_hash_lock);
+
+ ipv6_ifa_notify(0, ifp);
+ in6_ifa_put(ifp);
+ goto restart;
+ }
+#ifdef CONFIG_IPV6_PRIVACY
+ } else if ((ifp->flags&IFA_F_TEMPORARY) &&
+ !(ifp->flags&IFA_F_TENTATIVE)) {
+ if (age >= ifp->prefered_lft - regen_advance) {
+ struct inet6_ifaddr *ifpub = ifp->ifpub;
+ if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
+ next = ifp->tstamp + ifp->prefered_lft * HZ;
+ if (!ifp->regen_count && ifpub) {
+ ifp->regen_count++;
+ in6_ifa_hold(ifp);
+ in6_ifa_hold(ifpub);
+ spin_unlock(&ifp->lock);
+ write_unlock(&addrconf_hash_lock);
+ ipv6_create_tempaddr(ifpub, ifp);
+ in6_ifa_put(ifpub);
+ in6_ifa_put(ifp);
+ goto restart;
+ }
+ } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
+ next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
+ spin_unlock(&ifp->lock);
+#endif
+ } else {
+ /* ifp->prefered_lft <= ifp->valid_lft */
+ if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
+ next = ifp->tstamp + ifp->prefered_lft * HZ;
+ spin_unlock(&ifp->lock);
+ }
+ }
+ write_unlock(&addrconf_hash_lock);
+ }
+
+ addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
+ add_timer(&addr_chk_timer);
+ spin_unlock_bh(&addrconf_verify_lock);
+}
+
+static int
+inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+ struct rtattr **rta = arg;
+ struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
+ struct in6_addr *pfx;
+
+ pfx = NULL;
+ if (rta[IFA_ADDRESS-1]) {
+ if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
+ return -EINVAL;
+ pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
+ }
+ if (rta[IFA_LOCAL-1]) {
+ if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
+ return -EINVAL;
+ pfx = RTA_DATA(rta[IFA_LOCAL-1]);
+ }
+ if (pfx == NULL)
+ return -EINVAL;
+
+ return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
+}
+
+static int
+inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+ struct rtattr **rta = arg;
+ struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
+ struct in6_addr *pfx;
+
+ pfx = NULL;
+ if (rta[IFA_ADDRESS-1]) {
+ if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
+ return -EINVAL;
+ pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
+ }
+ if (rta[IFA_LOCAL-1]) {
+ if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
+ return -EINVAL;
+ pfx = RTA_DATA(rta[IFA_LOCAL-1]);
+ }
+ if (pfx == NULL)
+ return -EINVAL;
+
+ return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
+}
+
+static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
+ u32 pid, u32 seq, int event)
+{
+ struct ifaddrmsg *ifm;
+ struct nlmsghdr *nlh;
+ struct ifa_cacheinfo ci;
+ unsigned char *b = skb->tail;
+
+ nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*ifm));
+ if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
+ ifm = NLMSG_DATA(nlh);
+ ifm->ifa_family = AF_INET6;
+ ifm->ifa_prefixlen = ifa->prefix_len;
+ ifm->ifa_flags = ifa->flags;
+ ifm->ifa_scope = RT_SCOPE_UNIVERSE;
+ if (ifa->scope&IFA_HOST)
+ ifm->ifa_scope = RT_SCOPE_HOST;
+ else if (ifa->scope&IFA_LINK)
+ ifm->ifa_scope = RT_SCOPE_LINK;
+ else if (ifa->scope&IFA_SITE)
+ ifm->ifa_scope = RT_SCOPE_SITE;
+ ifm->ifa_index = ifa->idev->dev->ifindex;
+ RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr);
+ if (!(ifa->flags&IFA_F_PERMANENT)) {
+ ci.ifa_prefered = ifa->prefered_lft;
+ ci.ifa_valid = ifa->valid_lft;
+ if (ci.ifa_prefered != INFINITY_LIFE_TIME) {
+ long tval = (jiffies - ifa->tstamp)/HZ;
+ ci.ifa_prefered -= tval;
+ if (ci.ifa_valid != INFINITY_LIFE_TIME)
+ ci.ifa_valid -= tval;
+ }
+ } else {
+ ci.ifa_prefered = INFINITY_LIFE_TIME;
+ ci.ifa_valid = INFINITY_LIFE_TIME;
+ }
+ ci.cstamp = (__u32)(TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) / HZ * 100
+ + TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
+ ci.tstamp = (__u32)(TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) / HZ * 100
+ + TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
+ RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
+ u32 pid, u32 seq, int event)
+{
+ struct ifaddrmsg *ifm;
+ struct nlmsghdr *nlh;
+ struct ifa_cacheinfo ci;
+ unsigned char *b = skb->tail;
+
+ nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*ifm));
+ if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
+ ifm = NLMSG_DATA(nlh);
+ ifm->ifa_family = AF_INET6;
+ ifm->ifa_prefixlen = 128;
+ ifm->ifa_flags = IFA_F_PERMANENT;
+ ifm->ifa_scope = RT_SCOPE_UNIVERSE;
+ if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE)
+ ifm->ifa_scope = RT_SCOPE_SITE;
+ ifm->ifa_index = ifmca->idev->dev->ifindex;
+ RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr);
+ ci.cstamp = (__u32)(TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) / HZ
+ * 100 + TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) % HZ
+ * 100 / HZ);
+ ci.tstamp = (__u32)(TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) / HZ
+ * 100 + TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) % HZ
+ * 100 / HZ);
+ ci.ifa_prefered = INFINITY_LIFE_TIME;
+ ci.ifa_valid = INFINITY_LIFE_TIME;
+ RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
+ u32 pid, u32 seq, int event)
+{
+ struct ifaddrmsg *ifm;
+ struct nlmsghdr *nlh;
+ struct ifa_cacheinfo ci;
+ unsigned char *b = skb->tail;
+
+ nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*ifm));
+ if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
+ ifm = NLMSG_DATA(nlh);
+ ifm->ifa_family = AF_INET6;
+ ifm->ifa_prefixlen = 128;
+ ifm->ifa_flags = IFA_F_PERMANENT;
+ ifm->ifa_scope = RT_SCOPE_UNIVERSE;
+ if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE)
+ ifm->ifa_scope = RT_SCOPE_SITE;
+ ifm->ifa_index = ifaca->aca_idev->dev->ifindex;
+ RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr);
+ ci.cstamp = (__u32)(TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) / HZ
+ * 100 + TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) % HZ
+ * 100 / HZ);
+ ci.tstamp = (__u32)(TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) / HZ
+ * 100 + TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) % HZ
+ * 100 / HZ);
+ ci.ifa_prefered = INFINITY_LIFE_TIME;
+ ci.ifa_valid = INFINITY_LIFE_TIME;
+ RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+enum addr_type_t
+{
+ UNICAST_ADDR,
+ MULTICAST_ADDR,
+ ANYCAST_ADDR,
+};
+
+static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
+ enum addr_type_t type)
+{
+ int idx, ip_idx;
+ int s_idx, s_ip_idx;
+ int err = 1;
+ struct net_device *dev;
+ struct inet6_dev *idev = NULL;
+ struct inet6_ifaddr *ifa;
+ struct ifmcaddr6 *ifmca;
+ struct ifacaddr6 *ifaca;
+
+ s_idx = cb->args[0];
+ s_ip_idx = ip_idx = cb->args[1];
+ read_lock(&dev_base_lock);
+
+ for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
+ if (idx < s_idx)
+ continue;
+ if (idx > s_idx)
+ s_ip_idx = 0;
+ ip_idx = 0;
+ if ((idev = in6_dev_get(dev)) == NULL)
+ continue;
+ read_lock_bh(&idev->lock);
+ switch (type) {
+ case UNICAST_ADDR:
+ /* unicast address */
+ for (ifa = idev->addr_list; ifa;
+ ifa = ifa->if_next, ip_idx++) {
+ if (ip_idx < s_ip_idx)
+ continue;
+ if ((err = inet6_fill_ifaddr(skb, ifa,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, RTM_NEWADDR)) <= 0)
+ goto done;
+ }
+ /* temp addr */
+#ifdef CONFIG_IPV6_PRIVACY
+ for (ifa = idev->tempaddr_list; ifa;
+ ifa = ifa->tmp_next, ip_idx++) {
+ if (ip_idx < s_ip_idx)
+ continue;
+ if ((err = inet6_fill_ifaddr(skb, ifa,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, RTM_NEWADDR)) <= 0)
+ goto done;
+ }
+#endif
+ break;
+ case MULTICAST_ADDR:
+ /* multicast address */
+ for (ifmca = idev->mc_list; ifmca;
+ ifmca = ifmca->next, ip_idx++) {
+ if (ip_idx < s_ip_idx)
+ continue;
+ if ((err = inet6_fill_ifmcaddr(skb, ifmca,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, RTM_GETMULTICAST)) <= 0)
+ goto done;
+ }
+ break;
+ case ANYCAST_ADDR:
+ /* anycast address */
+ for (ifaca = idev->ac_list; ifaca;
+ ifaca = ifaca->aca_next, ip_idx++) {
+ if (ip_idx < s_ip_idx)
+ continue;
+ if ((err = inet6_fill_ifacaddr(skb, ifaca,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, RTM_GETANYCAST)) <= 0)
+ goto done;
+ }
+ break;
+ default:
+ break;
+ }
+ read_unlock_bh(&idev->lock);
+ in6_dev_put(idev);
+ }
+done:
+ if (err <= 0) {
+ read_unlock_bh(&idev->lock);
+ in6_dev_put(idev);
+ }
+ read_unlock(&dev_base_lock);
+ cb->args[0] = idx;
+ cb->args[1] = ip_idx;
+ return skb->len;
+}
+
+static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ enum addr_type_t type = UNICAST_ADDR;
+ return inet6_dump_addr(skb, cb, type);
+}
+
+static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ enum addr_type_t type = MULTICAST_ADDR;
+ return inet6_dump_addr(skb, cb, type);
+}
+
+
+static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ enum addr_type_t type = ANYCAST_ADDR;
+ return inet6_dump_addr(skb, cb, type);
+}
+
+static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
+{
+ struct sk_buff *skb;
+ int size = NLMSG_SPACE(sizeof(struct ifaddrmsg)+128);
+
+ skb = alloc_skb(size, GFP_ATOMIC);
+ if (!skb) {
+ netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFADDR, ENOBUFS);
+ return;
+ }
+ if (inet6_fill_ifaddr(skb, ifa, 0, 0, event) < 0) {
+ kfree_skb(skb);
+ netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFADDR, EINVAL);
+ return;
+ }
+ NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_IFADDR;
+ netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_IFADDR, GFP_ATOMIC);
+}
+
+static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
+ __s32 *array, int bytes)
+{
+ memset(array, 0, bytes);
+ array[DEVCONF_FORWARDING] = cnf->forwarding;
+ array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
+ array[DEVCONF_MTU6] = cnf->mtu6;
+ array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
+ array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
+ array[DEVCONF_AUTOCONF] = cnf->autoconf;
+ array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
+ array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
+ array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
+ array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
+ array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
+#ifdef CONFIG_IPV6_PRIVACY
+ array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
+ array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
+ array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
+ array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
+ array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
+#endif
+ array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
+}
+
+static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
+ u32 pid, u32 seq, int event)
+{
+ struct net_device *dev = idev->dev;
+ __s32 *array = NULL;
+ struct ifinfomsg *r;
+ struct nlmsghdr *nlh;
+ unsigned char *b = skb->tail;
+ struct rtattr *subattr;
+ __u32 mtu = dev->mtu;
+ struct ifla_cacheinfo ci;
+
+ nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*r));
+ if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
+ r = NLMSG_DATA(nlh);
+ r->ifi_family = AF_INET6;
+ r->ifi_type = dev->type;
+ r->ifi_index = dev->ifindex;
+ r->ifi_flags = dev_get_flags(dev);
+ r->ifi_change = 0;
+
+ RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
+
+ if (dev->addr_len)
+ RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
+
+ RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
+ if (dev->ifindex != dev->iflink)
+ RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink);
+
+ subattr = (struct rtattr*)skb->tail;
+
+ RTA_PUT(skb, IFLA_PROTINFO, 0, NULL);
+
+ /* return the device flags */
+ RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags);
+
+ /* return interface cacheinfo */
+ ci.max_reasm_len = IPV6_MAXPLEN;
+ ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
+ + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
+ ci.reachable_time = idev->nd_parms->reachable_time;
+ ci.retrans_time = idev->nd_parms->retrans_time;
+ RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
+
+ /* return the device sysctl params */
+ if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL)
+ goto rtattr_failure;
+ ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array));
+ RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array);
+
+ /* XXX - Statistics/MC not implemented */
+ subattr->rta_len = skb->tail - (u8*)subattr;
+
+ nlh->nlmsg_len = skb->tail - b;
+ kfree(array);
+ return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+ if (array)
+ kfree(array);
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int idx, err;
+ int s_idx = cb->args[0];
+ struct net_device *dev;
+ struct inet6_dev *idev;
+
+ read_lock(&dev_base_lock);
+ for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
+ if (idx < s_idx)
+ continue;
+ if ((idev = in6_dev_get(dev)) == NULL)
+ continue;
+ err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, RTM_NEWLINK);
+ in6_dev_put(idev);
+ if (err <= 0)
+ break;
+ }
+ read_unlock(&dev_base_lock);
+ cb->args[0] = idx;
+
+ return skb->len;
+}
+
+void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
+{
+ struct sk_buff *skb;
+ /* 128 bytes ?? */
+ int size = NLMSG_SPACE(sizeof(struct ifinfomsg)+128);
+
+ skb = alloc_skb(size, GFP_ATOMIC);
+ if (!skb) {
+ netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFINFO, ENOBUFS);
+ return;
+ }
+ if (inet6_fill_ifinfo(skb, idev, 0, 0, event) < 0) {
+ kfree_skb(skb);
+ netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFINFO, EINVAL);
+ return;
+ }
+ NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_IFINFO;
+ netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_IFINFO, GFP_ATOMIC);
+}
+
+static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
+ struct prefix_info *pinfo, u32 pid, u32 seq, int event)
+{
+ struct prefixmsg *pmsg;
+ struct nlmsghdr *nlh;
+ unsigned char *b = skb->tail;
+ struct prefix_cacheinfo ci;
+
+ nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(*pmsg));
+
+ if (pid)
+ nlh->nlmsg_flags |= NLM_F_MULTI;
+
+ pmsg = NLMSG_DATA(nlh);
+ pmsg->prefix_family = AF_INET6;
+ pmsg->prefix_ifindex = idev->dev->ifindex;
+ pmsg->prefix_len = pinfo->prefix_len;
+ pmsg->prefix_type = pinfo->type;
+
+ pmsg->prefix_flags = 0;
+ if (pinfo->onlink)
+ pmsg->prefix_flags |= IF_PREFIX_ONLINK;
+ if (pinfo->autoconf)
+ pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
+
+ RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);
+
+ ci.preferred_time = ntohl(pinfo->prefered);
+ ci.valid_time = ntohl(pinfo->valid);
+ RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);
+
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static void inet6_prefix_notify(int event, struct inet6_dev *idev,
+ struct prefix_info *pinfo)
+{
+ struct sk_buff *skb;
+ int size = NLMSG_SPACE(sizeof(struct prefixmsg)+128);
+
+ skb = alloc_skb(size, GFP_ATOMIC);
+ if (!skb) {
+ netlink_set_err(rtnl, 0, RTMGRP_IPV6_PREFIX, ENOBUFS);
+ return;
+ }
+ if (inet6_fill_prefix(skb, idev, pinfo, 0, 0, event) < 0) {
+ kfree_skb(skb);
+ netlink_set_err(rtnl, 0, RTMGRP_IPV6_PREFIX, EINVAL);
+ return;
+ }
+ NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_PREFIX;
+ netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_PREFIX, GFP_ATOMIC);
+}
+
+static struct rtnetlink_link inet6_rtnetlink_table[RTM_MAX - RTM_BASE + 1] = {
+ [RTM_GETLINK - RTM_BASE] = { .dumpit = inet6_dump_ifinfo, },
+ [RTM_NEWADDR - RTM_BASE] = { .doit = inet6_rtm_newaddr, },
+ [RTM_DELADDR - RTM_BASE] = { .doit = inet6_rtm_deladdr, },
+ [RTM_GETADDR - RTM_BASE] = { .dumpit = inet6_dump_ifaddr, },
+ [RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
+ [RTM_GETANYCAST - RTM_BASE] = { .dumpit = inet6_dump_ifacaddr, },
+ [RTM_NEWROUTE - RTM_BASE] = { .doit = inet6_rtm_newroute, },
+ [RTM_DELROUTE - RTM_BASE] = { .doit = inet6_rtm_delroute, },
+ [RTM_GETROUTE - RTM_BASE] = { .doit = inet6_rtm_getroute,
+ .dumpit = inet6_dump_fib, },
+};
+
+static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
+{
+ inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
+
+ switch (event) {
+ case RTM_NEWADDR:
+ dst_hold(&ifp->rt->u.dst);
+ if (ip6_ins_rt(ifp->rt, NULL, NULL))
+ dst_release(&ifp->rt->u.dst);
+ if (ifp->idev->cnf.forwarding)
+ addrconf_join_anycast(ifp);
+ break;
+ case RTM_DELADDR:
+ if (ifp->idev->cnf.forwarding)
+ addrconf_leave_anycast(ifp);
+ addrconf_leave_solict(ifp->idev, &ifp->addr);
+ dst_hold(&ifp->rt->u.dst);
+ if (ip6_del_rt(ifp->rt, NULL, NULL))
+ dst_free(&ifp->rt->u.dst);
+ else
+ dst_release(&ifp->rt->u.dst);
+ break;
+ }
+}
+
+static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
+{
+ read_lock_bh(&addrconf_lock);
+ if (likely(ifp->idev->dead == 0))
+ __ipv6_ifa_notify(event, ifp);
+ read_unlock_bh(&addrconf_lock);
+}
+
+#ifdef CONFIG_SYSCTL
+
+static
+int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int *valp = ctl->data;
+ int val = *valp;
+ int ret;
+
+ ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
+
+ if (write && valp != &ipv6_devconf_dflt.forwarding) {
+ if (valp != &ipv6_devconf.forwarding) {
+ if ((!*valp) ^ (!val)) {
+ struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
+ if (idev == NULL)
+ return ret;
+ dev_forward_change(idev);
+ }
+ } else {
+ ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
+ addrconf_forward_change();
+ }
+ if (*valp)
+ rt6_purge_dflt_routers();
+ }
+
+ return ret;
+}
+
+static int addrconf_sysctl_forward_strategy(ctl_table *table,
+ int __user *name, int nlen,
+ void __user *oldval,
+ size_t __user *oldlenp,
+ void __user *newval, size_t newlen,
+ void **context)
+{
+ int *valp = table->data;
+ int new;
+
+ if (!newval || !newlen)
+ return 0;
+ if (newlen != sizeof(int))
+ return -EINVAL;
+ if (get_user(new, (int __user *)newval))
+ return -EFAULT;
+ if (new == *valp)
+ return 0;
+ if (oldval && oldlenp) {
+ size_t len;
+ if (get_user(len, oldlenp))
+ return -EFAULT;
+ if (len) {
+ if (len > table->maxlen)
+ len = table->maxlen;
+ if (copy_to_user(oldval, valp, len))
+ return -EFAULT;
+ if (put_user(len, oldlenp))
+ return -EFAULT;
+ }
+ }
+
+ if (valp != &ipv6_devconf_dflt.forwarding) {
+ if (valp != &ipv6_devconf.forwarding) {
+ struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
+ int changed;
+ if (unlikely(idev == NULL))
+ return -ENODEV;
+ changed = (!*valp) ^ (!new);
+ *valp = new;
+ if (changed)
+ dev_forward_change(idev);
+ } else {
+ *valp = new;
+ addrconf_forward_change();
+ }
+
+ if (*valp)
+ rt6_purge_dflt_routers();
+ } else
+ *valp = new;
+
+ return 1;
+}
+
+static struct addrconf_sysctl_table
+{
+ struct ctl_table_header *sysctl_header;
+ ctl_table addrconf_vars[__NET_IPV6_MAX];
+ ctl_table addrconf_dev[2];
+ ctl_table addrconf_conf_dir[2];
+ ctl_table addrconf_proto_dir[2];
+ ctl_table addrconf_root_dir[2];
+} addrconf_sysctl = {
+ .sysctl_header = NULL,
+ .addrconf_vars = {
+ {
+ .ctl_name = NET_IPV6_FORWARDING,
+ .procname = "forwarding",
+ .data = &ipv6_devconf.forwarding,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &addrconf_sysctl_forward,
+ .strategy = &addrconf_sysctl_forward_strategy,
+ },
+ {
+ .ctl_name = NET_IPV6_HOP_LIMIT,
+ .procname = "hop_limit",
+ .data = &ipv6_devconf.hop_limit,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV6_MTU,
+ .procname = "mtu",
+ .data = &ipv6_devconf.mtu6,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV6_ACCEPT_RA,
+ .procname = "accept_ra",
+ .data = &ipv6_devconf.accept_ra,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV6_ACCEPT_REDIRECTS,
+ .procname = "accept_redirects",
+ .data = &ipv6_devconf.accept_redirects,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV6_AUTOCONF,
+ .procname = "autoconf",
+ .data = &ipv6_devconf.autoconf,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV6_DAD_TRANSMITS,
+ .procname = "dad_transmits",
+ .data = &ipv6_devconf.dad_transmits,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV6_RTR_SOLICITS,
+ .procname = "router_solicitations",
+ .data = &ipv6_devconf.rtr_solicits,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV6_RTR_SOLICIT_INTERVAL,
+ .procname = "router_solicitation_interval",
+ .data = &ipv6_devconf.rtr_solicit_interval,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ {
+ .ctl_name = NET_IPV6_RTR_SOLICIT_DELAY,
+ .procname = "router_solicitation_delay",
+ .data = &ipv6_devconf.rtr_solicit_delay,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ {
+ .ctl_name = NET_IPV6_FORCE_MLD_VERSION,
+ .procname = "force_mld_version",
+ .data = &ipv6_devconf.force_mld_version,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#ifdef CONFIG_IPV6_PRIVACY
+ {
+ .ctl_name = NET_IPV6_USE_TEMPADDR,
+ .procname = "use_tempaddr",
+ .data = &ipv6_devconf.use_tempaddr,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV6_TEMP_VALID_LFT,
+ .procname = "temp_valid_lft",
+ .data = &ipv6_devconf.temp_valid_lft,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV6_TEMP_PREFERED_LFT,
+ .procname = "temp_prefered_lft",
+ .data = &ipv6_devconf.temp_prefered_lft,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV6_REGEN_MAX_RETRY,
+ .procname = "regen_max_retry",
+ .data = &ipv6_devconf.regen_max_retry,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV6_MAX_DESYNC_FACTOR,
+ .procname = "max_desync_factor",
+ .data = &ipv6_devconf.max_desync_factor,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+ {
+ .ctl_name = NET_IPV6_MAX_ADDRESSES,
+ .procname = "max_addresses",
+ .data = &ipv6_devconf.max_addresses,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = 0, /* sentinel */
+ }
+ },
+ .addrconf_dev = {
+ {
+ .ctl_name = NET_PROTO_CONF_ALL,
+ .procname = "all",
+ .mode = 0555,
+ .child = addrconf_sysctl.addrconf_vars,
+ },
+ {
+ .ctl_name = 0, /* sentinel */
+ }
+ },
+ .addrconf_conf_dir = {
+ {
+ .ctl_name = NET_IPV6_CONF,
+ .procname = "conf",
+ .mode = 0555,
+ .child = addrconf_sysctl.addrconf_dev,
+ },
+ {
+ .ctl_name = 0, /* sentinel */
+ }
+ },
+ .addrconf_proto_dir = {
+ {
+ .ctl_name = NET_IPV6,
+ .procname = "ipv6",
+ .mode = 0555,
+ .child = addrconf_sysctl.addrconf_conf_dir,
+ },
+ {
+ .ctl_name = 0, /* sentinel */
+ }
+ },
+ .addrconf_root_dir = {
+ {
+ .ctl_name = CTL_NET,
+ .procname = "net",
+ .mode = 0555,
+ .child = addrconf_sysctl.addrconf_proto_dir,
+ },
+ {
+ .ctl_name = 0, /* sentinel */
+ }
+ },
+};
+
+static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p)
+{
+ int i;
+ struct net_device *dev = idev ? idev->dev : NULL;
+ struct addrconf_sysctl_table *t;
+ char *dev_name = NULL;
+
+ t = kmalloc(sizeof(*t), GFP_KERNEL);
+ if (t == NULL)
+ return;
+ memcpy(t, &addrconf_sysctl, sizeof(*t));
+ for (i=0; t->addrconf_vars[i].data; i++) {
+ t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
+ t->addrconf_vars[i].de = NULL;
+ t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
+ }
+ if (dev) {
+ dev_name = dev->name;
+ t->addrconf_dev[0].ctl_name = dev->ifindex;
+ } else {
+ dev_name = "default";
+ t->addrconf_dev[0].ctl_name = NET_PROTO_CONF_DEFAULT;
+ }
+
+ /*
+ * Make a copy of dev_name, because '.procname' is regarded as const
+ * by sysctl and we wouldn't want anyone to change it under our feet
+ * (see SIOCSIFNAME).
+ */
+ dev_name = net_sysctl_strdup(dev_name);
+ if (!dev_name)
+ goto free;
+
+ t->addrconf_dev[0].procname = dev_name;
+
+ t->addrconf_dev[0].child = t->addrconf_vars;
+ t->addrconf_dev[0].de = NULL;
+ t->addrconf_conf_dir[0].child = t->addrconf_dev;
+ t->addrconf_conf_dir[0].de = NULL;
+ t->addrconf_proto_dir[0].child = t->addrconf_conf_dir;
+ t->addrconf_proto_dir[0].de = NULL;
+ t->addrconf_root_dir[0].child = t->addrconf_proto_dir;
+ t->addrconf_root_dir[0].de = NULL;
+
+ t->sysctl_header = register_sysctl_table(t->addrconf_root_dir, 0);
+ if (t->sysctl_header == NULL)
+ goto free_procname;
+ else
+ p->sysctl = t;
+ return;
+
+ /* error path */
+ free_procname:
+ kfree(dev_name);
+ free:
+ kfree(t);
+
+ return;
+}
+
+static void addrconf_sysctl_unregister(struct ipv6_devconf *p)
+{
+ if (p->sysctl) {
+ struct addrconf_sysctl_table *t = p->sysctl;
+ p->sysctl = NULL;
+ unregister_sysctl_table(t->sysctl_header);
+ kfree(t->addrconf_dev[0].procname);
+ kfree(t);
+ }
+}
+
+
+#endif
+
+/*
+ * Device notifier
+ */
+
+int register_inet6addr_notifier(struct notifier_block *nb)
+{
+ return notifier_chain_register(&inet6addr_chain, nb);
+}
+
+int unregister_inet6addr_notifier(struct notifier_block *nb)
+{
+ return notifier_chain_unregister(&inet6addr_chain,nb);
+}
+
+/*
+ * Init / cleanup code
+ */
+
+int __init addrconf_init(void)
+{
+ int err = 0;
+
+ /* The addrconf netdev notifier requires that loopback_dev
+ * has it's ipv6 private information allocated and setup
+ * before it can bring up and give link-local addresses
+ * to other devices which are up.
+ *
+ * Unfortunately, loopback_dev is not necessarily the first
+ * entry in the global dev_base list of net devices. In fact,
+ * it is likely to be the very last entry on that list.
+ * So this causes the notifier registry below to try and
+ * give link-local addresses to all devices besides loopback_dev
+ * first, then loopback_dev, which cases all the non-loopback_dev
+ * devices to fail to get a link-local address.
+ *
+ * So, as a temporary fix, allocate the ipv6 structure for
+ * loopback_dev first by hand.
+ * Longer term, all of the dependencies ipv6 has upon the loopback
+ * device and it being up should be removed.
+ */
+ rtnl_lock();
+ if (!ipv6_add_dev(&loopback_dev))
+ err = -ENOMEM;
+ rtnl_unlock();
+ if (err)
+ return err;
+
+ register_netdevice_notifier(&ipv6_dev_notf);
+
+#ifdef CONFIG_IPV6_PRIVACY
+ md5_tfm = crypto_alloc_tfm("md5", 0);
+ if (unlikely(md5_tfm == NULL))
+ printk(KERN_WARNING
+ "failed to load transform for md5\n");
+#endif
+
+ addrconf_verify(0);
+ rtnetlink_links[PF_INET6] = inet6_rtnetlink_table;
+#ifdef CONFIG_SYSCTL
+ addrconf_sysctl.sysctl_header =
+ register_sysctl_table(addrconf_sysctl.addrconf_root_dir, 0);
+ addrconf_sysctl_register(NULL, &ipv6_devconf_dflt);
+#endif
+
+ return 0;
+}
+
+void __exit addrconf_cleanup(void)
+{
+ struct net_device *dev;
+ struct inet6_dev *idev;
+ struct inet6_ifaddr *ifa;
+ int i;
+
+ unregister_netdevice_notifier(&ipv6_dev_notf);
+
+ rtnetlink_links[PF_INET6] = NULL;
+#ifdef CONFIG_SYSCTL
+ addrconf_sysctl_unregister(&ipv6_devconf_dflt);
+ addrconf_sysctl_unregister(&ipv6_devconf);
+#endif
+
+ rtnl_lock();
+
+ /*
+ * clean dev list.
+ */
+
+ for (dev=dev_base; dev; dev=dev->next) {
+ if ((idev = __in6_dev_get(dev)) == NULL)
+ continue;
+ addrconf_ifdown(dev, 1);
+ }
+ addrconf_ifdown(&loopback_dev, 2);
+
+ /*
+ * Check hash table.
+ */
+
+ write_lock_bh(&addrconf_hash_lock);
+ for (i=0; i < IN6_ADDR_HSIZE; i++) {
+ for (ifa=inet6_addr_lst[i]; ifa; ) {
+ struct inet6_ifaddr *bifa;
+
+ bifa = ifa;
+ ifa = ifa->lst_next;
+ printk(KERN_DEBUG "bug: IPv6 address leakage detected: ifa=%p\n", bifa);
+ /* Do not free it; something is wrong.
+ Now we can investigate it with debugger.
+ */
+ }
+ }
+ write_unlock_bh(&addrconf_hash_lock);
+
+ del_timer(&addr_chk_timer);
+
+ rtnl_unlock();
+
+#ifdef CONFIG_IPV6_PRIVACY
+ if (likely(md5_tfm != NULL)) {
+ crypto_free_tfm(md5_tfm);
+ md5_tfm = NULL;
+ }
+#endif
+
+#ifdef CONFIG_PROC_FS
+ proc_net_remove("if_inet6");
+#endif
+}