Merge git://git.skbuff.net/gitroot/yoshfuji/linux-2.6.14+advapi-fix/

[firefly-linux-kernel-4.4.55.git] / include / net / ipv6.h

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 53c76c8a69007ba0b6f9c80f852efc8994b061a3..0a2ad51cff8223dd1936e958a498d6dbd8644b2d 100644 (file)
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -254,12 +254,25 @@ typedef int               (*inet_getfrag_t) (const void *data,
                                           char *,
                                           unsigned int, unsigned int);
 
-
-extern int             ipv6_addr_type(const struct in6_addr *addr);
+extern int __ipv6_addr_type(const struct in6_addr *addr);
+static inline int ipv6_addr_type(const struct in6_addr *addr)
+{
+       return __ipv6_addr_type(addr) & 0xffff;
+}
 
 static inline int ipv6_addr_scope(const struct in6_addr *addr)
 {
-       return ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
+       return __ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
+}
+
+static inline int __ipv6_addr_src_scope(int type)
+{
+       return (type == IPV6_ADDR_ANY ? __IPV6_ADDR_SCOPE_INVALID : (type >> 16));
+}
+
+static inline int ipv6_addr_src_scope(const struct in6_addr *addr)
+{
+       return __ipv6_addr_src_scope(__ipv6_addr_type(addr));
 }
 
 static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
@@ -342,6 +355,54 @@ static inline int ipv6_addr_any(const struct in6_addr *a)
                 a->s6_addr32[2] | a->s6_addr32[3] ) == 0); 
 }
 
+/*
+ * find the first different bit between two addresses
+ * length of address must be a multiple of 32bits
+ */
+static inline int __ipv6_addr_diff(const void *token1, const void *token2, int addrlen)
+{
+       const __u32 *a1 = token1, *a2 = token2;
+       int i;
+
+       addrlen >>= 2;
+
+       for (i = 0; i < addrlen; i++) {
+               __u32 xb = a1[i] ^ a2[i];
+               if (xb) {
+                       int j = 31;
+
+                       xb = ntohl(xb);
+                       while ((xb & (1 << j)) == 0)
+                               j--;
+
+                       return (i * 32 + 31 - j);
+               }
+       }
+
+       /*
+        *      we should *never* get to this point since that 
+        *      would mean the addrs are equal
+        *
+        *      However, we do get to it 8) And exacly, when
+        *      addresses are equal 8)
+        *
+        *      ip route add 1111::/128 via ...
+        *      ip route add 1111::/64 via ...
+        *      and we are here.
+        *
+        *      Ideally, this function should stop comparison
+        *      at prefix length. It does not, but it is still OK,
+        *      if returned value is greater than prefix length.
+        *                                      --ANK (980803)
+        */
+       return (addrlen << 5);
+}
+
+static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_addr *a2)
+{
+       return __ipv6_addr_diff(a1, a2, sizeof(struct in6_addr));
+}
+
 /*
  *     Prototypes exported by ipv6
  */