vserver 2.0 rc7

[linux-2.6.git] / include / net / ipv6.h

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 147d47a..771b47e 100644 (file)
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -305,6 +305,32 @@ static inline int ipv6_addr_equal(const struct in6_addr *a1,
                a1->s6_addr32[3] == a2->s6_addr32[3]);
 }
 
+static inline int __ipv6_prefix_equal(const u32 *a1, const u32 *a2,
+                                     unsigned int prefixlen)
+{
+       unsigned pdw, pbi;
+
+       /* check complete u32 in prefix */
+       pdw = prefixlen >> 5;
+       if (pdw && memcmp(a1, a2, pdw << 2))
+               return 0;
+
+       /* check incomplete u32 in prefix */
+       pbi = prefixlen & 0x1f;
+       if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
+               return 0;
+
+       return 1;
+}
+
+static inline int ipv6_prefix_equal(const struct in6_addr *a1,
+                                   const struct in6_addr *a2,
+                                   unsigned int prefixlen)
+{
+       return __ipv6_prefix_equal(a1->s6_addr32, a2->s6_addr32,
+                                  prefixlen);
+}
+
 static inline int ipv6_addr_any(const struct in6_addr *a)
 {
        return ((a->s6_addr32[0] | a->s6_addr32[1] | 
@@ -390,7 +416,7 @@ extern void                 ipv6_push_frag_opts(struct sk_buff *skb,
                                                    u8 *proto);
 
 extern int                     ipv6_skip_exthdr(const struct sk_buff *, int start,
-                                                u8 *nexthdrp, int len);
+                                                u8 *nexthdrp);
 
 extern int                     ipv6_ext_hdr(u8 nexthdr);