Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / net / ipv4 / arp.c

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index a642fd6..4749d50 100644 (file)
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -79,6 +79,7 @@
 #include <linux/string.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
+#include <linux/capability.h>
 #include <linux/config.h>
 #include <linux/socket.h>
 #include <linux/sockios.h>
@@ -86,6 +87,7 @@
 #include <linux/in.h>
 #include <linux/mm.h>
 #include <linux/inet.h>
+#include <linux/inetdevice.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/fddidevice.h>
@@ -241,7 +243,7 @@ static int arp_constructor(struct neighbour *neigh)
        neigh->type = inet_addr_type(addr);
 
        rcu_read_lock();
-       in_dev = rcu_dereference(__in_dev_get(dev));
+       in_dev = __in_dev_get_rcu(dev);
        if (in_dev == NULL) {
                rcu_read_unlock();
                return -EINVAL;
@@ -697,12 +699,6 @@ void arp_send(int type, int ptype, u32 dest_ip,
        arp_xmit(skb);
 }
 
-static void parp_redo(struct sk_buff *skb)
-{
-       nf_reset(skb);
-       arp_rcv(skb, skb->dev, NULL);
-}
-
 /*
  *     Process an arp request.
  */
@@ -865,7 +861,7 @@ static int arp_process(struct sk_buff *skb)
                                if (n)
                                        neigh_release(n);
 
-                               if (skb->stamp.tv_sec == LOCALLY_ENQUEUED || 
+                               if (NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED || 
                                    skb->pkt_type == PACKET_HOST ||
                                    in_dev->arp_parms->proxy_delay == 0) {
                                        arp_send(ARPOP_REPLY,ETH_P_ARP,sip,dev,tip,sha,dev->dev_addr,sha);
@@ -883,16 +879,16 @@ static int arp_process(struct sk_buff *skb)
 
        n = __neigh_lookup(&arp_tbl, &sip, dev, 0);
 
-#ifdef CONFIG_IP_ACCEPT_UNSOLICITED_ARP
-       /* Unsolicited ARP is not accepted by default.
-          It is possible, that this option should be enabled for some
-          devices (strip is candidate)
-        */
-       if (n == NULL &&
-           arp->ar_op == htons(ARPOP_REPLY) &&
-           inet_addr_type(sip) == RTN_UNICAST)
-               n = __neigh_lookup(&arp_tbl, &sip, dev, -1);
-#endif
+       if (ipv4_devconf.arp_accept) {
+               /* Unsolicited ARP is not accepted by default.
+                  It is possible, that this option should be enabled for some
+                  devices (strip is candidate)
+                */
+               if (n == NULL &&
+                   arp->ar_op == htons(ARPOP_REPLY) &&
+                   inet_addr_type(sip) == RTN_UNICAST)
+                       n = __neigh_lookup(&arp_tbl, &sip, dev, -1);
+       }
 
        if (n) {
                int state = NUD_REACHABLE;
@@ -922,12 +918,18 @@ out:
        return 0;
 }
 
+static void parp_redo(struct sk_buff *skb)
+{
+       arp_process(skb);
+}
+
 
 /*
  *     Receive an arp request from the device layer.
  */
 
-int arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+static int arp_rcv(struct sk_buff *skb, struct net_device *dev,
+                  struct packet_type *pt, struct net_device *orig_dev)
 {
        struct arphdr *arp;
 
@@ -948,6 +950,8 @@ int arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
        if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
                goto out_of_mem;
 
+       memset(NEIGH_CB(skb), 0, sizeof(struct neighbour_cb));
+
        return NF_HOOK(NF_ARP, NF_ARP_IN, skb, dev, NULL, arp_process);
 
 freeskb:
@@ -988,8 +992,8 @@ static int arp_req_set(struct arpreq *r, struct net_device * dev)
                        ipv4_devconf.proxy_arp = 1;
                        return 0;
                }
-               if (__in_dev_get(dev)) {
-                       __in_dev_get(dev)->cnf.proxy_arp = 1;
+               if (__in_dev_get_rtnl(dev)) {
+                       __in_dev_get_rtnl(dev)->cnf.proxy_arp = 1;
                        return 0;
                }
                return -ENXIO;
@@ -1094,8 +1098,8 @@ static int arp_req_delete(struct arpreq *r, struct net_device * dev)
                                ipv4_devconf.proxy_arp = 0;
                                return 0;
                        }
-                       if (__in_dev_get(dev)) {
-                               __in_dev_get(dev)->cnf.proxy_arp = 0;
+                       if (__in_dev_get_rtnl(dev)) {
+                               __in_dev_get_rtnl(dev)->cnf.proxy_arp = 0;
                                return 0;
                        }
                        return -ENXIO;
@@ -1414,7 +1418,6 @@ static int __init arp_proc_init(void)
 
 EXPORT_SYMBOL(arp_broken_ops);
 EXPORT_SYMBOL(arp_find);
-EXPORT_SYMBOL(arp_rcv);
 EXPORT_SYMBOL(arp_create);
 EXPORT_SYMBOL(arp_xmit);
 EXPORT_SYMBOL(arp_send);