diff options
Diffstat (limited to 'lib/in46_addr.c')
| -rw-r--r-- | lib/in46_addr.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/in46_addr.c b/lib/in46_addr.c index 844e318..a220583 100644 --- a/lib/in46_addr.c +++ b/lib/in46_addr.c @@ -74,6 +74,23 @@ int in46a_equal(const struct in46_addr *a, const struct in46_addr *b) return 0; } +/*! Determine if two in46_addr prefix are equal or not + * The prefix length is determined by the shortest of the prefixes of a and b + * \returns 1 in case the common prefix are equal; 0 otherwise */ +int in46a_prefix_equal(const struct in46_addr *a, const struct in46_addr *b) +{ + unsigned int len; + if (a->len > b->len) + len = b->len; + else + len = a->len; + + if (!memcmp(&a->v6, &b->v6, len)) + return 1; + else + return 0; +} + /*! Match if IPv6 addr1 + addr2 are within same \a mask */ static int ipv6_within_mask(const struct in6_addr *addr1, const struct in6_addr *addr2, const struct in6_addr *mask) |