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in-addr-util: introduce in6_addr_is_link_local_all_nodes()

This commit is contained in:
Yu Watanabe 2020-09-15 15:33:56 +09:00
parent 5fb16c7c77
commit 5643cfc0d9
2 changed files with 11 additions and 0 deletions
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10
src/basic/in-addr-util.c
View File

@ -54,6 +54,16 @@ int in_addr_is_link_local(int family, const union in_addr_union *u) {
return -EAFNOSUPPORT;
}
bool in6_addr_is_link_local_all_nodes(const struct in6_addr *a) {
assert(a);
/* ff02::1 */
return be32toh(a->s6_addr32[0]) == UINT32_C(0xff020000) &&
a->s6_addr32[1] == 0 &&
a->s6_addr32[2] == 0 &&
be32toh(a->s6_addr32[3]) == UINT32_C(0x00000001);
}
int in_addr_is_multicast(int family, const union in_addr_union *u) {
assert(u);

1
src/basic/in-addr-util.h
View File

@ -27,6 +27,7 @@ int in_addr_is_multicast(int family, const union in_addr_union *u);
bool in4_addr_is_link_local(const struct in_addr *a);
int in_addr_is_link_local(int family, const union in_addr_union *u);
bool in6_addr_is_link_local_all_nodes(const struct in6_addr *a);
bool in4_addr_is_localhost(const struct in_addr *a);
int in_addr_is_localhost(int family, const union in_addr_union *u);