inet: constify ip headers and in6_addr

[deliverable/linux.git] / net / ipv6 / ndisc.c

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 0e49c9db3c981914cfd099306faa8f431ecc49dd..69aacd18e066299085e00455253db887f3f31cee 100644 (file)
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -324,7 +324,7 @@ static inline u8 *ndisc_opt_addr_data(struct nd_opt_hdr *p,
        return lladdr + prepad;
 }
 
-int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir)
+int ndisc_mc_map(const struct in6_addr *addr, char *buf, struct net_device *dev, int dir)
 {
        switch (dev->type) {
        case ARPHRD_ETHER:
@@ -341,6 +341,8 @@ int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int d
        case ARPHRD_INFINIBAND:
                ipv6_ib_mc_map(addr, dev->broadcast, buf);
                return 0;
+       case ARPHRD_IPGRE:
+               return ipv6_ipgre_mc_map(addr, dev->broadcast, buf);
        default:
                if (dir) {
                        memcpy(buf, dev->broadcast, dev->addr_len);
@@ -609,6 +611,29 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
                     inc_opt ? ND_OPT_TARGET_LL_ADDR : 0);
 }
 
+static void ndisc_send_unsol_na(struct net_device *dev)
+{
+       struct inet6_dev *idev;
+       struct inet6_ifaddr *ifa;
+       struct in6_addr mcaddr;
+
+       idev = in6_dev_get(dev);
+       if (!idev)
+               return;
+
+       read_lock_bh(&idev->lock);
+       list_for_each_entry(ifa, &idev->addr_list, if_list) {
+               addrconf_addr_solict_mult(&ifa->addr, &mcaddr);
+               ndisc_send_na(dev, NULL, &mcaddr, &ifa->addr,
+                             /*router=*/ !!idev->cnf.forwarding,
+                             /*solicited=*/ false, /*override=*/ true,
+                             /*inc_opt=*/ true);
+       }
+       read_unlock_bh(&idev->lock);
+
+       in6_dev_put(idev);
+}
+
 void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh,
                   const struct in6_addr *solicit,
                   const struct in6_addr *daddr, const struct in6_addr *saddr)
@@ -723,8 +748,8 @@ static int pndisc_is_router(const void *pkey,
 static void ndisc_recv_ns(struct sk_buff *skb)
 {
        struct nd_msg *msg = (struct nd_msg *)skb_transport_header(skb);
-       struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
-       struct in6_addr *daddr = &ipv6_hdr(skb)->daddr;
+       const struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
+       const struct in6_addr *daddr = &ipv6_hdr(skb)->daddr;
        u8 *lladdr = NULL;
        u32 ndoptlen = skb->tail - (skb->transport_header +
                                    offsetof(struct nd_msg, opt));
@@ -899,8 +924,8 @@ out:
 static void ndisc_recv_na(struct sk_buff *skb)
 {
        struct nd_msg *msg = (struct nd_msg *)skb_transport_header(skb);
-       struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
-       struct in6_addr *daddr = &ipv6_hdr(skb)->daddr;
+       const struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
+       const struct in6_addr *daddr = &ipv6_hdr(skb)->daddr;
        u8 *lladdr = NULL;
        u32 ndoptlen = skb->tail - (skb->transport_header +
                                    offsetof(struct nd_msg, opt));
@@ -943,9 +968,10 @@ static void ndisc_recv_na(struct sk_buff *skb)
        }
        ifp = ipv6_get_ifaddr(dev_net(dev), &msg->target, dev, 1);
        if (ifp) {
-               if (ifp->flags & IFA_F_TENTATIVE) {
-                       addrconf_dad_failure(ifp);
-                       return;
+               if (skb->pkt_type != PACKET_LOOPBACK
+                   && (ifp->flags & IFA_F_TENTATIVE)) {
+                               addrconf_dad_failure(ifp);
+                               return;
                }
                /* What should we make now? The advertisement
                   is invalid, but ndisc specs say nothing
@@ -1012,7 +1038,7 @@ static void ndisc_recv_rs(struct sk_buff *skb)
        unsigned long ndoptlen = skb->len - sizeof(*rs_msg);
        struct neighbour *neigh;
        struct inet6_dev *idev;
-       struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
+       const struct in6_addr *saddr = &ipv6_hdr(skb)->saddr;
        struct ndisc_options ndopts;
        u8 *lladdr = NULL;
 
@@ -1409,8 +1435,8 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
 {
        struct inet6_dev *in6_dev;
        struct icmp6hdr *icmph;
-       struct in6_addr *dest;
-       struct in6_addr *target;        /* new first hop to destination */
+       const struct in6_addr *dest;
+       const struct in6_addr *target;  /* new first hop to destination */
        struct neighbour *neigh;
        int on_link = 0;
        struct ndisc_options ndopts;
@@ -1443,7 +1469,7 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
        }
 
        icmph = icmp6_hdr(skb);
-       target = (struct in6_addr *) (icmph + 1);
+       target = (const struct in6_addr *) (icmph + 1);
        dest = target + 1;
 
        if (ipv6_addr_is_multicast(dest)) {
@@ -1720,6 +1746,10 @@ static int ndisc_netdev_event(struct notifier_block *this, unsigned long event,
                neigh_ifdown(&nd_tbl, dev);
                fib6_run_gc(~0UL, net);
                break;
+       case NETDEV_NOTIFY_PEERS:
+       case NETDEV_BONDING_FAILOVER:
+               ndisc_send_unsol_na(dev);
+               break;
        default:
                break;
        }