Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm

[linux.git] / net / ipv4 / ipip.c

diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index ea398ee43f28740d6b75eee0efe5ecdcd97c54ee..0c45565292284d38e6d3d1cc7cfedecab9a41d30 100644 (file)
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -94,7 +94,6 @@
 
  
 #include <linux/capability.h>
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/sched.h>
@@ -342,7 +341,8 @@ out:
        int code = skb->h.icmph->code;
        int rel_type = 0;
        int rel_code = 0;
-       int rel_info = 0;
+       __be32 rel_info = 0;
+       __u32 n = 0;
        struct sk_buff *skb2;
        struct flowi fl;
        struct rtable *rt;
@@ -355,14 +355,15 @@ out:
        default:
                return 0;
        case ICMP_PARAMETERPROB:
-               if (skb->h.icmph->un.gateway < hlen)
+               n = ntohl(skb->h.icmph->un.gateway) >> 24;
+               if (n < hlen)
                        return 0;
 
                /* So... This guy found something strange INSIDE encapsulated
                   packet. Well, he is fool, but what can we do ?
                 */
                rel_type = ICMP_PARAMETERPROB;
-               rel_info = skb->h.icmph->un.gateway - hlen;
+               rel_info = htonl((n - hlen) << 24);
                break;
 
        case ICMP_DEST_UNREACH:
@@ -373,13 +374,14 @@ out:
                        return 0;
                case ICMP_FRAG_NEEDED:
                        /* And it is the only really necessary thing :-) */
-                       rel_info = ntohs(skb->h.icmph->un.frag.mtu);
-                       if (rel_info < hlen+68)
+                       n = ntohs(skb->h.icmph->un.frag.mtu);
+                       if (n < hlen+68)
                                return 0;
-                       rel_info -= hlen;
+                       n -= hlen;
                        /* BSD 4.2 MORE DOES NOT EXIST IN NATURE. */
-                       if (rel_info > ntohs(eiph->tot_len))
+                       if (n > ntohs(eiph->tot_len))
                                return 0;
+                       rel_info = htonl(n);
                        break;
                default:
                        /* All others are translated to HOST_UNREACH.
@@ -441,12 +443,11 @@ out:
 
        /* change mtu on this route */
        if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) {
-               if (rel_info > dst_mtu(skb2->dst)) {
+               if (n > dst_mtu(skb2->dst)) {
                        kfree_skb(skb2);
                        return 0;
                }
-               skb2->dst->ops->update_pmtu(skb2->dst, rel_info);
-               rel_info = htonl(rel_info);
+               skb2->dst->ops->update_pmtu(skb2->dst, n);
        } else if (type == ICMP_TIME_EXCEEDED) {
                struct ip_tunnel *t = netdev_priv(skb2->dev);
                if (t->parms.iph.ttl) {
@@ -488,7 +489,6 @@ static int ipip_rcv(struct sk_buff *skb)
 
                skb->mac.raw = skb->nh.raw;
                skb->nh.raw = skb->data;
-               memset(&(IPCB(skb)->opt), 0, sizeof(struct ip_options));
                skb->protocol = htons(ETH_P_IP);
                skb->pkt_type = PACKET_HOST;