diff options
Diffstat (limited to 'lib/ipv6.h')
| -rw-r--r-- | lib/ipv6.h | 20 |
1 files changed, 20 insertions, 0 deletions
@@ -12,6 +12,7 @@ #include <sys/types.h> #include <netinet/in.h> #include "lib/string.h" +#include "lib/bitops.h" typedef struct ipv6_addr { u32 addr[4]; @@ -23,6 +24,7 @@ typedef struct ipv6_addr { #define _I2(a) ((a).addr[2]) #define _I3(a) ((a).addr[3]) +#define MAX_PREFIX_LENGTH 128 #define BITS_PER_IP_ADDRESS 128 #define STD_ADDRESS_P_LENGTH 39 #define SIZE_OF_IP_HEADER 40 @@ -57,6 +59,9 @@ typedef struct ipv6_addr { /* ipa_from_u32 and ipa_to_u32 replaced by ipa_build */ #define ipa_build(a,b,c,d) _MI(a,b,c,d) #define ipa_compare(x,y) ipv6_compare(x,y) +/* ipa_pxlen() requires that x != y */ +#define ipa_pxlen(x, y) ipv6_pxlen(x, y) +#define ipa_getbit(x, y) ipv6_getbit(x, y) #define ipa_absolutize(x,y) ipv6_absolutize(x,y) ip_addr ipv6_mkmask(unsigned); @@ -81,6 +86,21 @@ static inline unsigned ipv6_hash(ip_addr *a) return (x ^ (x >> 16) ^ (x >> 8)) & 0xffff; } +static inline u32 ipv6_getbit(ip_addr a, u32 y) +{ + return a.addr[y / 32] & (0x80000000 >> (y % 32)); +} + +static inline u32 ipv6_pxlen(ip_addr a, ip_addr b) +{ + int i = 0; + i+= (a.addr[i] == b.addr[i]); + i+= (a.addr[i] == b.addr[i]); + i+= (a.addr[i] == b.addr[i]); + i+= (a.addr[i] == b.addr[i]); + return 32 * i + 31 - u32_log2(a.addr[i] ^ b.addr[i]); +} + /* * RFC 1883 defines packet precendece, but RFC 2460 replaces it * by generic Traffic Class ID with no defined semantics. Better |