diff options
Diffstat (limited to 'lib/libc/net/gethostnamadr.c')
| -rw-r--r-- | lib/libc/net/gethostnamadr.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/lib/libc/net/gethostnamadr.c b/lib/libc/net/gethostnamadr.c index 78b3a7a..8aae192 100644 --- a/lib/libc/net/gethostnamadr.c +++ b/lib/libc/net/gethostnamadr.c @@ -252,6 +252,9 @@ int gethostbyaddr_r(const char *addr, int len, int af, struct hostent *he, struct hostent_data *hed) { + const u_char *uaddr = (const u_char *)addr; + const struct in6_addr *addr6; + socklen_t size; int rval; static const ns_dtab dtab[] = { @@ -261,8 +264,40 @@ gethostbyaddr_r(const char *addr, int len, int af, struct hostent *he, { 0 } }; + if (af == AF_INET6 && len == IN6ADDRSZ) { + addr6 = (const struct in6_addr *)(const void *)uaddr; + if (IN6_IS_ADDR_LINKLOCAL(addr6)) { + h_errno = HOST_NOT_FOUND; + return -1; + } + if (IN6_IS_ADDR_V4MAPPED(addr6) || + IN6_IS_ADDR_V4COMPAT(addr6)) { + /* Unmap. */ + uaddr += IN6ADDRSZ - INADDRSZ; + af = AF_INET; + len = INADDRSZ; + } + } + switch (af) { + case AF_INET: + size = INADDRSZ; + break; + case AF_INET6: + size = IN6ADDRSZ; + break; + default: + errno = EAFNOSUPPORT; + h_errno = NETDB_INTERNAL; + return -1; + } + if (size != len) { + errno = EINVAL; + h_errno = NETDB_INTERNAL; + return -1; + } + rval = _nsdispatch(NULL, dtab, NSDB_HOSTS, "gethostbyaddr", - default_src, addr, len, af, he, hed); + default_src, uaddr, len, af, he, hed); return (rval == NS_SUCCESS) ? 0 : -1; } |
