From fc53809803cd2bc2434e312b19a18fa36776da12 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 12 Jun 2024 05:50:40 +0200 Subject: Adding upstream version 256. Signed-off-by: Daniel Baumann --- src/basic/in-addr-util.c | 108 ++++++++++++++++++++++++++++++----------------- 1 file changed, 69 insertions(+), 39 deletions(-) (limited to 'src/basic/in-addr-util.c') diff --git a/src/basic/in-addr-util.c b/src/basic/in-addr-util.c index ee4ea67..c077f0a 100644 --- a/src/basic/in-addr-util.c +++ b/src/basic/in-addr-util.c @@ -91,14 +91,26 @@ bool in6_addr_is_link_local_all_nodes(const struct in6_addr *a) { be32toh(a->s6_addr32[3]) == UINT32_C(0x00000001); } +bool in4_addr_is_multicast(const struct in_addr *a) { + assert(a); + + return IN_MULTICAST(be32toh(a->s_addr)); +} + +bool in6_addr_is_multicast(const struct in6_addr *a) { + assert(a); + + return IN6_IS_ADDR_MULTICAST(a); +} + int in_addr_is_multicast(int family, const union in_addr_union *u) { assert(u); if (family == AF_INET) - return IN_MULTICAST(be32toh(u->in.s_addr)); + return in4_addr_is_multicast(&u->in); if (family == AF_INET6) - return IN6_IS_ADDR_MULTICAST(&u->in6); + return in6_addr_is_multicast(&u->in6); return -EAFNOSUPPORT; } @@ -182,58 +194,69 @@ int in_addr_equal(int family, const union in_addr_union *a, const union in_addr_ return -EAFNOSUPPORT; } -int in_addr_prefix_intersect( - int family, - const union in_addr_union *a, +bool in4_addr_prefix_intersect( + const struct in_addr *a, unsigned aprefixlen, - const union in_addr_union *b, + const struct in_addr *b, unsigned bprefixlen) { - unsigned m; - assert(a); assert(b); - /* Checks whether there are any addresses that are in both networks */ + unsigned m = MIN3(aprefixlen, bprefixlen, (unsigned) (sizeof(struct in_addr) * 8)); + if (m == 0) + return true; /* Let's return earlier, to avoid shift by 32. */ - m = MIN(aprefixlen, bprefixlen); + uint32_t x = be32toh(a->s_addr ^ b->s_addr); + uint32_t n = 0xFFFFFFFFUL << (32 - m); + return (x & n) == 0; +} - if (family == AF_INET) { - uint32_t x, nm; +bool in6_addr_prefix_intersect( + const struct in6_addr *a, + unsigned aprefixlen, + const struct in6_addr *b, + unsigned bprefixlen) { - x = be32toh(a->in.s_addr ^ b->in.s_addr); - nm = m == 0 ? 0 : 0xFFFFFFFFUL << (32 - m); + assert(a); + assert(b); - return (x & nm) == 0; - } + unsigned m = MIN3(aprefixlen, bprefixlen, (unsigned) (sizeof(struct in6_addr) * 8)); + if (m == 0) + return true; - if (family == AF_INET6) { - unsigned i; + for (size_t i = 0; i < sizeof(struct in6_addr); i++) { + uint8_t x = a->s6_addr[i] ^ b->s6_addr[i]; + uint8_t n = m < 8 ? (0xFF << (8 - m)) : 0xFF; + if ((x & n) != 0) + return false; - if (m > 128) - m = 128; + if (m <= 8) + break; - for (i = 0; i < 16; i++) { - uint8_t x, nm; + m -= 8; + } - x = a->in6.s6_addr[i] ^ b->in6.s6_addr[i]; + return true; +} - if (m < 8) - nm = 0xFF << (8 - m); - else - nm = 0xFF; +int in_addr_prefix_intersect( + int family, + const union in_addr_union *a, + unsigned aprefixlen, + const union in_addr_union *b, + unsigned bprefixlen) { - if ((x & nm) != 0) - return 0; + assert(a); + assert(b); - if (m > 8) - m -= 8; - else - m = 0; - } + /* Checks whether there are any addresses that are in both networks. */ - return 1; - } + if (family == AF_INET) + return in4_addr_prefix_intersect(&a->in, aprefixlen, &b->in, bprefixlen); + + if (family == AF_INET6) + return in6_addr_prefix_intersect(&a->in6, aprefixlen, &b->in6, bprefixlen); return -EAFNOSUPPORT; } @@ -922,12 +945,19 @@ int in_addr_prefix_from_string_auto_internal( } +void in_addr_hash_func(const union in_addr_union *u, int family, struct siphash *state) { + assert(u); + assert(state); + + siphash24_compress(u->bytes, FAMILY_ADDRESS_SIZE(family), state); +} + void in_addr_data_hash_func(const struct in_addr_data *a, struct siphash *state) { assert(a); assert(state); - siphash24_compress(&a->family, sizeof(a->family), state); - siphash24_compress(&a->address, FAMILY_ADDRESS_SIZE(a->family), state); + siphash24_compress_typesafe(a->family, state); + in_addr_hash_func(&a->address, a->family, state); } int in_addr_data_compare_func(const struct in_addr_data *x, const struct in_addr_data *y) { @@ -960,7 +990,7 @@ void in6_addr_hash_func(const struct in6_addr *addr, struct siphash *state) { assert(addr); assert(state); - siphash24_compress(addr, sizeof(*addr), state); + siphash24_compress_typesafe(*addr, state); } int in6_addr_compare_func(const struct in6_addr *a, const struct in6_addr *b) { -- cgit v1.2.3