-/* Copyright (C) 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by H.J. Lu <hjl@gnu.ai.mit.edu>, 1997.
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.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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.
+ Lesser 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. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <wctype.h>
+#include <resolv/resolv-internal.h>
+#include <resolv/resolv_context.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include "nsswitch.h"
+
+#ifdef USE_NSCD
+# define inet_aton __inet_aton
+# include <nscd/nscd_proto.h>
+#endif
+
+int
+__nss_hostname_digits_dots (const char *name, struct hostent *resbuf,
+ char **buffer, size_t *buffer_size,
+ size_t buflen, struct hostent **result,
+ enum nss_status *status, int af, int *h_errnop)
+{
+ /* We have to test for the use of IPv6 which can only be done by
+ examining `_res'. */
+ struct resolv_context *ctx = __resolv_context_get ();
+ if (ctx == NULL)
+ {
+ if (h_errnop)
+ *h_errnop = NETDB_INTERNAL;
+ if (buffer_size == NULL)
+ *status = NSS_STATUS_TRYAGAIN;
+ else
+ *result = NULL;
+ return -1;
+ }
+ int ret = __nss_hostname_digits_dots_context
+ (ctx, name, resbuf, buffer, buffer_size, buflen,
+ result, status, af, h_errnop);
+ __resolv_context_put (ctx);
+ return ret;
+}
+
+int
+__nss_hostname_digits_dots_context (struct resolv_context *ctx,
+ const char *name, struct hostent *resbuf,
+ char **buffer, size_t *buffer_size,
+ size_t buflen, struct hostent **result,
+ enum nss_status *status, int af, int *h_errnop)
+{
+ int save;
/*
* disallow names consisting only of digits/dots, unless
* they end in a dot.
*/
- if (isdigit (name[0]) || (isxdigit (name[0]) || name[0] == ':'))
+ if (isdigit (name[0]) || isxdigit (name[0]) || name[0] == ':')
{
const char *cp;
char *hostname;
- typedef unsigned char host_addr_t [16];
+ 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;
+ typedef char *host_addr_list_t[2];
host_addr_list_t *h_addr_ptrs;
+ char **h_alias_ptr;
size_t size_needed;
int addr_size;
-#ifndef HAVE_AF
- int af = -1;
-#endif
switch (af)
{
break;
default:
- af = (_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET;
- addr_size = (af == AF_INET6 ) ? IN6ADDRSZ : INADDRSZ;
+ af = 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)
+ + sizeof (*h_alias_ptr) + strlen (name) + 1);
-#ifdef HAVE_LOOKUP_BUFFER
- if (buflen < size_needed)
- {
- __set_errno (ERANGE);
- goto done;
+ if (buffer_size == NULL)
+ {
+ if (buflen < size_needed)
+ {
+ *status = NSS_STATUS_TRYAGAIN;
+ if (h_errnop != NULL)
+ *h_errnop = NETDB_INTERNAL;
+ __set_errno (ERANGE);
+ goto done;
+ }
}
-#else
- if (buffer_size < size_needed)
+ else if (buffer_size != NULL && *buffer_size < size_needed)
{
char *new_buf;
- buffer_size = size_needed;
- new_buf = realloc (buffer, buffer_size);
+ *buffer_size = size_needed;
+ new_buf = (char *) realloc (*buffer, *buffer_size);
if (new_buf == NULL)
{
save = errno;
- free (buffer);
- buffer = NULL;
- buffer_size = 0;
+ free (*buffer);
+ *buffer = NULL;
+ *buffer_size = 0;
__set_errno (save);
- result = (struct hostent *) NULL;
+ if (h_errnop != NULL)
+ *h_errnop = NETDB_INTERNAL;
+ *result = NULL;
goto done;
}
- buffer = new_buf;
+ *buffer = new_buf;
}
-#endif /* HAVE_LOOKUP_BUFFER */
- memset (buffer, 0, size_needed);
+ memset (*buffer, '\0', size_needed);
- host_addr = (host_addr_t *) buffer;
- host_aliases = (host_addr_list_t *)
- ((char *) host_addr + sizeof (*host_addr));
+ host_addr = (host_addr_t *) *buffer;
h_addr_ptrs = (host_addr_list_t *)
- ((char *) host_aliases + sizeof (*host_aliases));
- hostname = (char *) h_addr_ptrs + sizeof (*h_addr_ptrs);
+ ((char *) host_addr + sizeof (*host_addr));
+ h_alias_ptr = (char **) ((char *) h_addr_ptrs + sizeof (*h_addr_ptrs));
+ hostname = (char *) h_alias_ptr + sizeof (*h_alias_ptr);
if (isdigit (name[0]))
{
for (cp = name;; ++cp)
{
- if (!*cp)
+ if (*cp == '\0')
{
- if (*--cp == '.') break;
+ int ok;
- /* All-numeric, no dot at the end. Fake up a hostent as if
- we'd actually done a lookup. What if someone types
- 255.255.255.255? The test below will succeed
- spuriously... ??? */
- if (inet_pton (af, name, host_addr) <= 0)
+ if (*--cp == '.')
+ break;
+
+ /* All-numeric, no dot at the end. Fake up a hostent as if
+ we'd actually done a lookup. What if someone types
+ 255.255.255.255? The test below will succeed
+ spuriously... ??? */
+ if (af == AF_INET)
+ ok = __inet_aton (name, (struct in_addr *) host_addr);
+ else
{
- __set_h_errno (HOST_NOT_FOUND);
-#ifndef HAVE_LOOKUP_BUFFER
- result = (struct hostent *) NULL;
-#endif
+ assert (af == AF_INET6);
+ ok = inet_pton (af, name, host_addr) > 0;
+ }
+ if (! ok)
+ {
+ *h_errnop = HOST_NOT_FOUND;
+ if (buffer_size == NULL)
+ *status = NSS_STATUS_NOTFOUND;
+ else
+ *result = NULL;
goto done;
}
- resbuf.h_name = strcpy (hostname, name);
- resbuf.h_aliases = *host_aliases;
- (*host_aliases)[0] = 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)
+ resbuf->h_name = strcpy (hostname, name);
+ h_alias_ptr[0] = NULL;
+ resbuf->h_aliases = h_alias_ptr;
+ (*h_addr_ptrs)[0] = (char *) host_addr;
+ (*h_addr_ptrs)[1] = NULL;
+ resbuf->h_addr_list = *h_addr_ptrs;
+ if (af == AF_INET && res_use_inet6 ())
{
/* We need to change the IP v4 address into the
IP v6 address. */
- char tmp[INADDRSZ], *p = (char *) host_addr;
+ char tmp[INADDRSZ];
+ char *p = (char *) host_addr;
int i;
/* Save a copy of the IP v4 address. */
*p++ = 0xff;
/* Copy the IP v4 address. */
memcpy (p, tmp, INADDRSZ);
- resbuf.h_addrtype = AF_INET6;
- resbuf.h_length = IN6ADDRSZ;
+ resbuf->h_addrtype = AF_INET6;
+ resbuf->h_length = IN6ADDRSZ;
}
else
{
- resbuf.h_addrtype = af;
- resbuf.h_length = addr_size;
+ resbuf->h_addrtype = af;
+ resbuf->h_length = addr_size;
}
- __set_h_errno (NETDB_SUCCESS);
-#ifdef HAVE_LOOKUP_BUFFER
- status = NSS_STATUS_SUCCESS;
-#else
- result = &resbuf;
-#endif
+ if (h_errnop != NULL)
+ *h_errnop = NETDB_SUCCESS;
+ if (buffer_size == NULL)
+ *status = NSS_STATUS_SUCCESS;
+ else
+ *result = resbuf;
goto done;
}
- if (!isdigit (*cp) && *cp != '.') break;
+ if (!isdigit (*cp) && *cp != '.')
+ break;
}
}
- if ((isxdigit (name[0]) && strchr (name, ':') != NULL)
- || name[0] == ':')
+ if ((isxdigit (name[0]) && strchr (name, ':') != NULL) || name[0] == ':')
{
- const char *cp;
- char *hostname;
- 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
-
switch (af)
{
+ default:
+ af = 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;
+ if (buffer_size == NULL)
+ *status = NSS_STATUS_NOTFOUND;
+ else
+ *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);
-
-#ifdef HAVE_LOOKUP_BUFFER
- if (buflen < size_needed)
- {
- __set_errno (ERANGE);
- goto done;
- }
-#else
- if (buffer_size < size_needed)
- {
- char *new_buf;
- buffer_size = size_needed;
- new_buf = realloc (buffer, buffer_size);
-
- if (new_buf == NULL)
- {
- save = errno;
- free (buffer);
- __set_errno (save);
- buffer = NULL;
- buffer_size = 0;
- result = (struct hostent *) NULL;
- goto done;
- }
- buffer = new_buf;
- }
-#endif /* HAVE_LOOKUP_BUFFER */
-
- 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));
- hostname = (char *) h_addr_ptrs + sizeof (*h_addr_ptrs);
-
for (cp = name;; ++cp)
{
if (!*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);
-#ifndef HAVE_LOOKUP_BUFFER
- result = (struct hostent *) NULL;
-#endif
+ *h_errnop = HOST_NOT_FOUND;
+ if (buffer_size == NULL)
+ *status = NSS_STATUS_NOTFOUND;
+ else
+ *result = NULL;
goto done;
}
- strcpy (hostname, name);
- resbuf.h_name = hostname;
- resbuf.h_aliases = *host_aliases;
- (*host_aliases)[0] = NULL;
+ resbuf->h_name = strcpy (hostname, name);
+ h_alias_ptr[0] = NULL;
+ resbuf->h_aliases = h_alias_ptr;
(*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_length = addr_size;
- __set_h_errno (NETDB_SUCCESS);
-#ifdef HAVE_LOOKUP_BUFFER
- status = NSS_STATUS_SUCCESS;
-#else
- result = &resbuf;
-#endif
+ resbuf->h_addr_list = *h_addr_ptrs;
+ resbuf->h_addrtype = AF_INET6;
+ resbuf->h_length = addr_size;
+ *h_errnop = NETDB_SUCCESS;
+ if (buffer_size == NULL)
+ *status = NSS_STATUS_SUCCESS;
+ else
+ *result = resbuf;
goto done;
}
- if (!isxdigit (*cp) && *cp != ':' && *cp != '.') break;
+ if (!isxdigit (*cp) && *cp != ':' && *cp != '.')
+ break;
}
}
}
+
+ return 0;
+
+done:
+ return 1;
+}
+libc_hidden_def (__nss_hostname_digits_dots)
projects / thirdparty / glibc.git / blobdiff