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Diffstat (limited to 'nss')
-rw-r--r--nss/digits_dots.c124
1 files changed, 79 insertions, 45 deletions
diff --git a/nss/digits_dots.c b/nss/digits_dots.c
index 306249a..03ae2ec 100644
--- a/nss/digits_dots.c
+++ b/nss/digits_dots.c
@@ -28,13 +28,15 @@
typedef unsigned char host_addr_t [16];
host_addr_t *host_addr;
typedef char *host_addr_list_t [2];
- host_addr_list_t *host_aliases;
host_addr_list_t *h_addr_ptrs;
size_t size_needed;
int addr_size;
#ifndef HAVE_AF
int af = -1;
#endif
+#ifdef HAVE_TYPE
+ int af = type;
+#endif
switch (af)
{
@@ -47,18 +49,26 @@
break;
default:
+#ifdef HAVE_TYPE
+ /* This must not happen. */
+ *h_errnop = HOST_NOT_FOUND;
+ goto done;
+#else
af = (_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET;
addr_size = af == AF_INET6 ? IN6ADDRSZ : INADDRSZ;
break;
+#endif
}
size_needed = (sizeof (*host_addr)
- + sizeof (*host_aliases) + sizeof (*h_addr_ptrs)
- + strlen (name) + 1);
+ + sizeof (*h_addr_ptrs) + strlen (name) + 1);
#ifdef HAVE_LOOKUP_BUFFER
if (buflen < size_needed)
{
+# ifdef NEED_H_ERRNO
+ *h_errnop = TRY_AGAIN;
+# endif
__set_errno (ERANGE);
goto done;
}
@@ -89,10 +99,8 @@
memset (buffer, 0, size_needed);
host_addr = (host_addr_t *) buffer;
- host_aliases = (host_addr_list_t *)
- ((char *) host_addr + sizeof (*host_addr));
h_addr_ptrs = (host_addr_list_t *)
- ((char *) host_aliases + sizeof (*host_aliases));
+ ((char *) host_addr + sizeof (*host_addr));
hostname = (char *) h_addr_ptrs + sizeof (*h_addr_ptrs);
if (isdigit (name[0]))
@@ -119,7 +127,7 @@
}
if (! ok)
{
- __set_h_errno (HOST_NOT_FOUND);
+ *h_errnop = HOST_NOT_FOUND;
#ifndef HAVE_LOOKUP_BUFFER
result = (struct hostent *) NULL;
#endif
@@ -127,36 +135,54 @@
}
resbuf.h_name = strcpy (hostname, name);
- resbuf.h_aliases = *host_aliases;
- (*host_aliases)[0] = NULL;
+ resbuf.h_aliases = NULL;
(*h_addr_ptrs)[0] = (char *)host_addr;
(*h_addr_ptrs)[1] = (char *)0;
resbuf.h_addr_list = *h_addr_ptrs;
- if (_res.options & RES_USE_INET6 && af == AF_INET)
+ if (
+#ifdef HAVE_TYPE
+ type == AF_INET6
+#else
+ af == AF_INET && (_res.options & RES_USE_INET6)
+#endif
+ )
{
- /* We need to change the IP v4 address into the
- IP v6 address. */
- char tmp[INADDRSZ], *p = (char *) host_addr;
- int i;
+#ifdef HAVE_TYPE
+ if ((flags & AI_V4MAPPED) == 0)
+ {
+ /* That's bad. The user hasn't specified that she
+ allows IPv4 numeric addresses. */
+ result = NULL;
+ *herrno_p = HOST_NOT_FOUND;
+ goto done;
+ }
+ else
+#endif
+ {
+ /* We need to change the IP v4 address into the
+ IP v6 address. */
+ char tmp[INADDRSZ], *p = (char *) host_addr;
+ int i;
- /* Save a copy of the IP v4 address. */
- memcpy (tmp, host_addr, INADDRSZ);
- /* Mark this ipv6 addr as a mapped ipv4. */
- for (i = 0; i < 10; i++)
- *p++ = 0x00;
- *p++ = 0xff;
- *p++ = 0xff;
- /* Copy the IP v4 address. */
- memcpy (p, tmp, INADDRSZ);
- resbuf.h_addrtype = AF_INET6;
- resbuf.h_length = IN6ADDRSZ;
+ /* Save a copy of the IP v4 address. */
+ memcpy (tmp, host_addr, INADDRSZ);
+ /* Mark this ipv6 addr as a mapped ipv4. */
+ for (i = 0; i < 10; i++)
+ *p++ = 0x00;
+ *p++ = 0xff;
+ *p++ = 0xff;
+ /* Copy the IP v4 address. */
+ memcpy (p, tmp, INADDRSZ);
+ resbuf.h_addrtype = AF_INET6;
+ resbuf.h_length = IN6ADDRSZ;
+ }
}
else
{
resbuf.h_addrtype = af;
resbuf.h_length = addr_size;
}
- __set_h_errno (NETDB_SUCCESS);
+ *h_errnop = NETDB_SUCCESS;
#ifdef HAVE_LOOKUP_BUFFER
status = NSS_STATUS_SUCCESS;
#else
@@ -177,37 +203,48 @@
typedef unsigned char host_addr_t [16];
host_addr_t *host_addr;
typedef char *host_addr_list_t [2];
- host_addr_list_t *host_aliases;
host_addr_list_t *h_addr_ptrs;
size_t size_needed;
int addr_size;
#ifndef HAVE_AF
int af = -1;
#endif
+#ifdef HAVE_TYPE
+ int af = type;
+#endif
switch (af)
{
+ default:
+ af = (_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET;
+ if (af == AF_INET6)
+ {
+ addr_size = IN6ADDRSZ;
+ break;
+ }
+ /* FALLTHROUGH */
+
case AF_INET:
- addr_size = INADDRSZ;
- break;
+ /* This is not possible. We cannot represent an IPv6 address
+ in an `struct in_addr' variable. */
+ *h_errnop = HOST_NOT_FOUND;
+ result = NULL;
+ goto done;
case AF_INET6:
addr_size = IN6ADDRSZ;
break;
-
- default:
- af = (_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET;
- addr_size = (af == AF_INET6 ) ? IN6ADDRSZ : INADDRSZ;
- break;
}
size_needed = (sizeof (*host_addr)
- + sizeof (*host_aliases) + sizeof (*h_addr_ptrs)
- + strlen (name) + 1);
+ + sizeof (*h_addr_ptrs) + strlen (name) + 1);
#ifdef HAVE_LOOKUP_BUFFER
if (buflen < size_needed)
{
+# ifdef NEED_H_ERRNO
+ *h_errnop = TRY_AGAIN;
+# endif
__set_errno (ERANGE);
goto done;
}
@@ -235,10 +272,8 @@
memset (buffer, 0, size_needed);
host_addr = (host_addr_t *) buffer;
- host_aliases = (host_addr_list_t *)
- ((char *) host_addr + sizeof (*host_addr));
h_addr_ptrs = (host_addr_list_t *)
- ((char *) host_aliases + sizeof (*host_aliases));
+ ((char *) host_addr + sizeof (*host_addr));
hostname = (char *) h_addr_ptrs + sizeof (*h_addr_ptrs);
for (cp = name;; ++cp)
@@ -250,9 +285,9 @@
/* All-IPv6-legal, no dot at the end. Fake up a
hostent as if we'd actually done a lookup. */
- if (inet_pton (af, name, host_addr) <= 0)
+ if (inet_pton (AF_INET6, name, host_addr) <= 0)
{
- __set_h_errno (HOST_NOT_FOUND);
+ *h_errnop = HOST_NOT_FOUND;
#ifndef HAVE_LOOKUP_BUFFER
result = (struct hostent *) NULL;
#endif
@@ -260,14 +295,13 @@
}
resbuf.h_name = strcpy (hostname, name);
- resbuf.h_aliases = *host_aliases;
- (*host_aliases)[0] = NULL;
+ resbuf.h_aliases = NULL;
(*h_addr_ptrs)[0] = (char *) host_addr;
(*h_addr_ptrs)[1] = (char *) 0;
resbuf.h_addr_list = *h_addr_ptrs;
- resbuf.h_addrtype = af;
+ resbuf.h_addrtype = AF_INET6;
resbuf.h_length = addr_size;
- __set_h_errno (NETDB_SUCCESS);
+ *h_errnop = NETDB_SUCCESS;
#ifdef HAVE_LOOKUP_BUFFER
status = NSS_STATUS_SUCCESS;
#else