--- /dev/null
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <assert.h>
+#include <errno.h>
+#include <netdb.h>
+#include <stdlib.h>
+
+#include "nsswitch.h"
+
+/* We avoid using a too large buffer in case the user is accumulating the
+ results and there is lots of unused space in the allocated buffer. */
+#define BUFLEN 512
+
+
+struct hostent *
+getipnodebyaddr (const char *addr, size_t len, int type, int *error_num)
+{
+ size_t buffer_size;
+ char *buffer;
+ struct hostent *result;
+
+ buffer_size = BUFLEN;
+ buffer = malloc (buffer_size);
+
+ while (buffer != NULL
+ && __gethostbyaddr_r (addr, len, type, (struct hostent *) buffer,
+ (char *) ((struct hostent *) buffer + 1),
+ buffer_size - sizeof (struct hostent),
+ &result, error_num) == ERANGE
+ && *error_num == NETDB_INTERNAL)
+ {
+ buffer_size += BUFLEN;
+ buffer = realloc (buffer, buffer_size);
+ if (buffer == NULL)
+ {
+ *error_num = TRY_AGAIN;
+ assert (result == NULL);
+ return NULL;
+ }
+ }
+
+ return buffer == NULL ? NULL : result;
+}
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)
{
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;
}
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]))
}
if (! ok)
{
- __set_h_errno (HOST_NOT_FOUND);
+ *h_errnop = HOST_NOT_FOUND;
#ifndef HAVE_LOOKUP_BUFFER
result = (struct hostent *) NULL;
#endif
}
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
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;
}
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)
/* 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
}
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
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