ipv6: Remove dependency of ipv6_frag_thdr_truncated on ipv6 module

[linux-2.6-microblaze.git] / include / net / ipv6_frag.h

diff --git a/include/net/ipv6_frag.h b/include/net/ipv6_frag.h
index a21e8b1..851029e 100644 (file)
--- a/include/net/ipv6_frag.h
+++ b/include/net/ipv6_frag.h
@@ -108,5 +108,35 @@ out_rcu_unlock:
        rcu_read_unlock();
        inet_frag_put(&fq->q);
 }
+
+/* Check if the upper layer header is truncated in the first fragment. */
+static inline bool
+ipv6frag_thdr_truncated(struct sk_buff *skb, int start, u8 *nexthdrp)
+{
+       u8 nexthdr = *nexthdrp;
+       __be16 frag_off;
+       int offset;
+
+       offset = ipv6_skip_exthdr(skb, start, &nexthdr, &frag_off);
+       if (offset < 0 || (frag_off & htons(IP6_OFFSET)))
+               return false;
+       switch (nexthdr) {
+       case NEXTHDR_TCP:
+               offset += sizeof(struct tcphdr);
+               break;
+       case NEXTHDR_UDP:
+               offset += sizeof(struct udphdr);
+               break;
+       case NEXTHDR_ICMP:
+               offset += sizeof(struct icmp6hdr);
+               break;
+       default:
+               offset += 1;
+       }
+       if (offset > skb->len)
+               return true;
+       return false;
+}
+
 #endif
 #endif