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2000-12-09  H.J. Lu  <hjl@gnu.org>

	* nss/Makefile (routines): Add digits_dots.
	* nss/Versions (libc): Add __nss_hostname_digits_dots to GLIBC_2.2.2.
	* nss/digits_dots.c (__nss_hostname_digits_dots): Turn template
	into a function.
	* nss/nsswitch.h (__nss_hostname_digits_dots): New internal NSS
	function.
	* nss/getXXbyYY.c (H_ERRNO_VAR_P): New definition.
	(TYPE_VAR_P): Likewise.
	(FLAGS_VAR): Likewise.
	(AF_VAR_P): Likewise.
	(INTERNAL (REENTRANT_NAME)): Call __nss_hostname_digits_dots ()
	instead of including digits_dots.c.
	* nss/getXXbyYY_r.c (H_ERRNO_VAR_P): New definition.
	(TYPE_VAR_P): Likewise.
	(FLAGS_VAR): Likewise.
	(AF_VAR_P): Likewise.
	(INTERNAL (REENTRANT_NAME)): Call __nss_hostname_digits_dots ()
	instead of including digits_dots.c.
This commit is contained in:
Ulrich Drepper
2001-01-21 21:23:21 +00:00
parent df18ec9afe
commit a5fdf99b7c
7 changed files with 225 additions and 152 deletions
Download Patch File Download Diff File Expand all files Collapse all files

262
nss/digits_dots.c
View File

@@ -1,4 +1,4 @@
/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc.
/* Copyright (C) 1997, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by H.J. Lu <hjl@gnu.ai.mit.edu>, 1997.
@@ -17,15 +17,46 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <wctype.h>
#include <resolv.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 *typep,
int flags, int *afp, int *h_errnop)
{
int save;
/* We have to test for the use of IPv6 which can only be done by
examining `_res'. */
if ((_res.options & RES_INIT) == 0 && __res_ninit (&_res) == -1)
{
if (h_errnop)
*h_errnop = NETDB_INTERNAL;
*result = NULL;
return -1;
}
/*
* 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;
@@ -36,13 +67,14 @@
char **h_alias_ptr;
size_t size_needed;
int addr_size;
#ifdef HAVE_TYPE
int af = type;
#else
# ifndef HAVE_AF
int af = -1;
# endif
#endif
int af;
if (typep != NULL)
af = *typep;
else if (afp != NULL)
af = *afp;
else
af = -1;
switch (af)
{
@@ -55,56 +87,58 @@
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;
if (typep != NULL)
{
/* This must not happen. */
if (h_errnop != NULL)
*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 (*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;
if (buffer_size == NULL)
{
if (buflen < size_needed)
{
if (h_errnop != NULL)
*h_errnop = TRY_AGAIN;
__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);
# ifdef NEED_H_ERRNO
*h_errnop = TRY_AGAIN;
# endif
result = (struct hostent *) NULL;
if (h_errnop != NULL)
*h_errnop = TRY_AGAIN;
*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_addr = (host_addr_t *) *buffer;
h_addr_ptrs = (host_addr_list_t *)
((char *) host_addr + sizeof (*host_addr));
h_alias_ptr = (char **) ((char *) h_addr_ptrs + sizeof (*h_addr_ptrs));
@@ -114,7 +148,7 @@
{
for (cp = name;; ++cp)
{
if (!*cp)
if (*cp == '\0')
{
int ok;
@@ -130,46 +164,40 @@
else
{
assert (af == AF_INET6);
ok = (inet_pton (af, name, host_addr) > 0);
ok = inet_pton (af, name, host_addr) > 0;
}
if (! ok)
{
*h_errnop = HOST_NOT_FOUND;
#ifndef HAVE_LOOKUP_BUFFER
result = (struct hostent *) NULL;
#endif
if (buffer_size)
*result = NULL;
goto done;
}
resbuf.h_name = strcpy (hostname, name);
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;
if (
#ifdef HAVE_TYPE
type == AF_INET6
#else
af == AF_INET && (_res.options & RES_USE_INET6)
#endif
)
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 ((typep != NULL && *typep == AF_INET6)
|| (af == AF_INET
&& (_res.options & RES_USE_INET6)))
{
#ifdef HAVE_TYPE
if ((flags & AI_V4MAPPED) == 0)
if (typep != NULL && (flags & AI_V4MAPPED) == 0)
{
/* That's bad. The user hasn't specified that she
allows IPv4 numeric addresses. */
result = NULL;
*result = NULL;
*h_errnop = 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;
char tmp[INADDRSZ];
char *p = (char *) host_addr;
int i;
/* Save a copy of the IP v4 address. */
@@ -181,46 +209,47 @@
*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;
}
*h_errnop = 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];
typedef unsigned char host_addr_t[16];
host_addr_t *host_addr;
typedef char *host_addr_list_t [2];
typedef char *host_addr_list_t[2];
host_addr_list_t *h_addr_ptrs;
size_t size_needed;
int addr_size;
#ifdef HAVE_TYPE
int af = type;
#else
# ifndef HAVE_AF
int af = -1;
# endif
#endif
int af;
if (typep != NULL)
af = *typep;
else if (afp != NULL)
af = *afp;
else
af = -1;
switch (af)
{
@@ -237,7 +266,7 @@
/* This is not possible. We cannot represent an IPv6 address
in an `struct in_addr' variable. */
*h_errnop = HOST_NOT_FOUND;
result = NULL;
*result = NULL;
goto done;
case AF_INET6:
@@ -248,39 +277,35 @@
size_needed = (sizeof (*host_addr)
+ sizeof (*h_addr_ptrs) + strlen (name) + 1);
#ifdef HAVE_LOOKUP_BUFFER
if (buflen < size_needed)
if (buffer_size == NULL && buflen < size_needed)
{
# ifdef NEED_H_ERRNO
*h_errnop = TRY_AGAIN;
# endif
if (h_errnop != NULL)
*h_errnop = TRY_AGAIN;
__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 = realloc (*buffer, *buffer_size);
if (new_buf == NULL)
{
save = errno;
free (buffer);
free (*buffer);
__set_errno (save);
buffer = NULL;
buffer_size = 0;
result = (struct hostent *) NULL;
*buffer = NULL;
*buffer_size = 0;
*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_addr = (host_addr_t *) *buffer;
h_addr_ptrs = (host_addr_list_t *)
((char *) host_addr + sizeof (*host_addr));
hostname = (char *) h_addr_ptrs + sizeof (*h_addr_ptrs);
@@ -297,30 +322,35 @@
if (inet_pton (AF_INET6, name, host_addr) <= 0)
{
*h_errnop = HOST_NOT_FOUND;
#ifndef HAVE_LOOKUP_BUFFER
result = (struct hostent *) NULL;
#endif
if (buffer_size)
*result = NULL;
goto done;
}
resbuf.h_name = strcpy (hostname, name);
resbuf->h_name = strcpy (hostname, name);
h_alias_ptr[0] = NULL;
resbuf.h_aliases = h_alias_ptr;
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_INET6;
resbuf.h_length = addr_size;
resbuf->h_addr_list = *h_addr_ptrs;
resbuf->h_addrtype = AF_INET6;
resbuf->h_length = addr_size;
*h_errnop = NETDB_SUCCESS;
#ifdef HAVE_LOOKUP_BUFFER
status = NSS_STATUS_SUCCESS;
#else
result = &resbuf;
#endif
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;
}