diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/sockunion.c | 17 | ||||
| -rw-r--r-- | lib/sockunion.h | 1 |
2 files changed, 18 insertions, 0 deletions
diff --git a/lib/sockunion.c b/lib/sockunion.c index c999845659..1dbf77efa4 100644 --- a/lib/sockunion.c +++ b/lib/sockunion.c @@ -708,3 +708,20 @@ static ssize_t printfrr_psu(char *buf, size_t bsz, const char *fmt, fb.pos[0] = '\0'; return consumed; } + +int sockunion_is_null(const union sockunion *su) +{ + unsigned char null_s6_addr[16] = {0}; + + switch (sockunion_family(su)) { + case AF_UNSPEC: + return 1; + case AF_INET: + return (su->sin.sin_addr.s_addr == 0); + case AF_INET6: + return !memcmp(su->sin6.sin6_addr.s6_addr, null_s6_addr, + sizeof(null_s6_addr)); + default: + return 0; + } +} diff --git a/lib/sockunion.h b/lib/sockunion.h index 72f12b77ca..5e80ba1090 100644 --- a/lib/sockunion.h +++ b/lib/sockunion.h @@ -102,6 +102,7 @@ extern union sockunion *sockunion_getpeername(int); extern union sockunion *sockunion_dup(const union sockunion *); extern void sockunion_free(union sockunion *); extern void sockunion_init(union sockunion *); +extern int sockunion_is_null(const union sockunion *su); #ifdef _FRR_ATTRIBUTE_PRINTFRR #pragma FRR printfrr_ext "%pSU" (union sockunion *) |