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util: make it easier to check whether in_addr or in6_addr addresses are NULL

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This commit is contained in:
Lennart Poettering
2016-06-02 20:34:21 +02:00
parent c917a32122
commit 34380032fb
2 changed files with 17 additions and 6 deletions
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20
src/basic/in-addr-util.c
View File

@@ -28,18 +28,26 @@
#include "macro.h"
#include "util.h"
bool in4_addr_is_null(const struct in_addr *a) {
return a->s_addr == 0;
}
bool in6_addr_is_null(const struct in6_addr *a) {
return
a->s6_addr32[0] == 0 &&
a->s6_addr32[1] == 0 &&
a->s6_addr32[2] == 0 &&
a->s6_addr32[3] == 0;
}
int in_addr_is_null(int family, const union in_addr_union *u) {
assert(u);
if (family == AF_INET)
return u->in.s_addr == 0;
return in4_addr_is_null(&u->in);
if (family == AF_INET6)
return
u->in6.s6_addr32[0] == 0 &&
u->in6.s6_addr32[1] == 0 &&
u->in6.s6_addr32[2] == 0 &&
u->in6.s6_addr32[3] == 0;
return in6_addr_is_null(&u->in6);
return -EAFNOSUPPORT;
}

3
src/basic/in-addr-util.h
View File

@@ -36,6 +36,9 @@ struct in_addr_data {
union in_addr_union address;
};
bool in4_addr_is_null(const struct in_addr *a);
bool in6_addr_is_null(const struct in6_addr *a);
int in_addr_is_null(int family, const union in_addr_union *u);
int in_addr_is_link_local(int family, const union in_addr_union *u);
int in_addr_is_localhost(int family, const union in_addr_union *u);