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[/] [scarts/] [trunk/] [toolchain/] [scarts-newlib/] [newlib-1.17.0/] [newlib/] [libc/] [sys/] [linux/] [net/] [digits_dots.c] - Blame information for rev 9

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/* Copyright (C) 1997, 1999, 2000, 2001, 2004 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 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
   Lesser General Public License for more details.
 
   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; 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 <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 af, int *h_errnop)
{
  int save;
 
  /* We have to test for the use of IPv6 which can only be done by
     examining `_res'.  */
  if (__res_maybe_init (&_res, 0) == -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] == ':')
    {
      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 *h_addr_ptrs;
      char **h_alias_ptr;
      size_t size_needed;
      int addr_size;
 
      switch (af)
        {
        case AF_INET:
          addr_size = INADDRSZ;
          break;
 
        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 (*h_addr_ptrs) + strlen (name) + 1);
 
      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 != NULL && *buffer_size < size_needed)
        {
          char *new_buf;
          *buffer_size = size_needed;
          new_buf = (char *) realloc (*buffer, *buffer_size);
 
          if (new_buf == NULL)
            {
              save = errno;
              free (*buffer);
              *buffer = NULL;
              *buffer_size = 0;
              __set_errno (save);
              if (h_errnop != NULL)
                *h_errnop = TRY_AGAIN;
              *result = NULL;
              goto done;
            }
          *buffer = new_buf;
        }
 
      memset (*buffer, '\0', size_needed);
 
      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));
      hostname = (char *) h_alias_ptr + sizeof (*h_alias_ptr);
 
      if (isdigit (name[0]))
        {
          for (cp = name;; ++cp)
            {
              if (*cp == '\0')
                {
                  int ok;
 
                  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
                    {
                      assert (af == AF_INET6);
                      ok = inet_pton (af, name, host_addr) > 0;
                    }
                  if (! ok)
                    {
                      *h_errnop = HOST_NOT_FOUND;
                      if (buffer_size)
                        *result = NULL;
                      goto done;
                    }
 
                  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.options & RES_USE_INET6))
                    {
                      /* We need to change the IP v4 address into the
                         IP v6 address.  */
                      char tmp[INADDRSZ];
                      char *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;
                    }
                  else
                    {
                      resbuf->h_addrtype = af;
                      resbuf->h_length = addr_size;
                    }
                  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 ((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 *h_addr_ptrs;
          size_t size_needed;
          int addr_size;
 
          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:
              /* 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;
            }
 
          size_needed = (sizeof (*host_addr)
                         + sizeof (*h_addr_ptrs) + strlen (name) + 1);
 
          if (buffer_size == NULL && buflen < size_needed)
            {
              if (h_errnop != NULL)
                *h_errnop = TRY_AGAIN;
              __set_errno (ERANGE);
              goto done;
            }
          else if (buffer_size != NULL && *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 = NULL;
                  goto done;
                }
              *buffer = new_buf;
            }
 
          memset (*buffer, '\0', size_needed);
 
          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);
 
          for (cp = name;; ++cp)
            {
              if (!*cp)
                {
                  if (*--cp == '.')
                    break;
 
                  /* All-IPv6-legal, no dot at the end. Fake up a
                     hostent as if we'd actually done a lookup.  */
                  if (inet_pton (AF_INET6, name, host_addr) <= 0)
                    {
                      *h_errnop = HOST_NOT_FOUND;
                      if (buffer_size)
                        *result = NULL;
                      goto done;
                    }
 
                  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_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;
            }
        }
    }
 
  return 0;
 
done:
  return 1;
}
libc_hidden_def (__nss_hostname_digits_dots)

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[/] [scarts/] [trunk/] [toolchain/] [scarts-newlib/] [newlib-1.17.0/] [newlib/] [libc/] [sys/] [linux/] [net/] [digits_dots.c] - Blame information for rev 9

Line No.	Rev	Author	Line
1	9	jlechner	`/* Copyright (C) 1997, 1999, 2000, 2001, 2004 Free Software Foundation, Inc.`
2			`This file is part of the GNU C Library.`
3			`Contributed by H.J. Lu <hjl@gnu.ai.mit.edu>, 1997.`
4
5			`The GNU C Library is free software; you can redistribute it and/or`
6			`modify it under the terms of the GNU Lesser General Public`
7			`License as published by the Free Software Foundation; either`
8			`version 2.1 of the License, or (at your option) any later version.`
9
10			`The GNU C Library is distributed in the hope that it will be useful,`
11			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
12			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
13			`Lesser General Public License for more details.`
14
15			`You should have received a copy of the GNU Lesser General Public`
16			`License along with the GNU C Library; if not, write to the Free`
17			`Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA`
18			`02111-1307 USA. */`
19
20			`#include <assert.h>`
21			`#include <errno.h>`
22			`#include <string.h>`
23			`#include <stdlib.h>`
24			`#include <ctype.h>`
25			`#include <wctype.h>`
26			`#include <resolv.h>`
27			`#include <netdb.h>`
28			`#include <arpa/inet.h>`
29			`#include "nsswitch.h"`
30
31			`#ifdef USE_NSCD`
32			`# define inet_aton __inet_aton`
33			`# include <nscd/nscd_proto.h>`
34			`#endif`
35
36			`int`
37			`__nss_hostname_digits_dots (const char name, struct hostent resbuf,`
38			`char *buffer, size_t buffer_size,`
39			`size_t buflen, struct hostent **result,`
40			`enum nss_status status, int af, int h_errnop)`
41			`{`
42			`int save;`
43
44			`/* We have to test for the use of IPv6 which can only be done by`
45			examining `_res'. */
46			`if (__res_maybe_init (&_res, 0) == -1)`
47			`{`
48			`if (h_errnop)`
49			`*h_errnop = NETDB_INTERNAL;`
50			`*result = NULL;`
51			`return -1;`
52			`}`
53
54			`/*`
55			`* disallow names consisting only of digits/dots, unless`
56			`* they end in a dot.`
57			`*/`
58			`if (isdigit (name[0]) \|\| isxdigit (name[0]) \|\| name[0] == ':')`
59			`{`
60			`const char *cp;`
61			`char *hostname;`
62			`typedef unsigned char host_addr_t[16];`
63			`host_addr_t *host_addr;`
64			`typedef char *host_addr_list_t[2];`
65			`host_addr_list_t *h_addr_ptrs;`
66			`char **h_alias_ptr;`
67			`size_t size_needed;`
68			`int addr_size;`
69
70			`switch (af)`
71			`{`
72			`case AF_INET:`
73			`addr_size = INADDRSZ;`
74			`break;`
75
76			`case AF_INET6:`
77			`addr_size = IN6ADDRSZ;`
78			`break;`
79
80			`default:`
81			`af = (_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET;`
82			`addr_size = af == AF_INET6 ? IN6ADDRSZ : INADDRSZ;`
83			`break;`
84			`}`
85
86			`size_needed = (sizeof (*host_addr)`
87			`+ sizeof (*h_addr_ptrs) + strlen (name) + 1);`
88
89			`if (buffer_size == NULL)`
90			`{`
91			`if (buflen < size_needed)`
92			`{`
93			`if (h_errnop != NULL)`
94			`*h_errnop = TRY_AGAIN;`
95			`__set_errno (ERANGE);`
96			`goto done;`
97			`}`
98			`}`
99			`else if (buffer_size != NULL && *buffer_size < size_needed)`
100			`{`
101			`char *new_buf;`
102			`*buffer_size = size_needed;`
103			`new_buf = (char ) realloc (buffer, *buffer_size);`
104
105			`if (new_buf == NULL)`
106			`{`
107			`save = errno;`
108			`free (*buffer);`
109			`*buffer = NULL;`
110			`*buffer_size = 0;`
111			`__set_errno (save);`
112			`if (h_errnop != NULL)`
113			`*h_errnop = TRY_AGAIN;`
114			`*result = NULL;`
115			`goto done;`
116			`}`
117			`*buffer = new_buf;`
118			`}`
119
120			`memset (*buffer, '\0', size_needed);`
121
122			`host_addr = (host_addr_t ) buffer;`
123			`h_addr_ptrs = (host_addr_list_t *)`
124			`((char ) host_addr + sizeof (host_addr));`
125			`h_alias_ptr = (char *) ((char ) h_addr_ptrs + sizeof (*h_addr_ptrs));`
126			`hostname = (char ) h_alias_ptr + sizeof (h_alias_ptr);`
127
128			`if (isdigit (name[0]))`
129			`{`
130			`for (cp = name;; ++cp)`
131			`{`
132			`if (*cp == '\0')`
133			`{`
134			`int ok;`
135
136			`if (*--cp == '.')`
137			`break;`
138
139			`/* All-numeric, no dot at the end. Fake up a hostent as if`
140			`we'd actually done a lookup. What if someone types`
141			`255.255.255.255? The test below will succeed`
142			`spuriously... ??? */`
143			`if (af == AF_INET)`
144			`ok = __inet_aton (name, (struct in_addr *) host_addr);`
145			`else`
146			`{`
147			`assert (af == AF_INET6);`
148			`ok = inet_pton (af, name, host_addr) > 0;`
149			`}`
150			`if (! ok)`
151			`{`
152			`*h_errnop = HOST_NOT_FOUND;`
153			`if (buffer_size)`
154			`*result = NULL;`
155			`goto done;`
156			`}`
157
158			`resbuf->h_name = strcpy (hostname, name);`
159			`h_alias_ptr[0] = NULL;`
160			`resbuf->h_aliases = h_alias_ptr;`
161			`(h_addr_ptrs)[0] = (char ) host_addr;`
162			`(*h_addr_ptrs)[1] = NULL;`
163			`resbuf->h_addr_list = *h_addr_ptrs;`
164			`if (af == AF_INET && (_res.options & RES_USE_INET6))`
165			`{`
166			`/* We need to change the IP v4 address into the`
167			`IP v6 address. */`
168			`char tmp[INADDRSZ];`
169			`char p = (char ) host_addr;`
170			`int i;`
171
172			`/* Save a copy of the IP v4 address. */`
173			`memcpy (tmp, host_addr, INADDRSZ);`
174			`/* Mark this ipv6 addr as a mapped ipv4. */`
175			`for (i = 0; i < 10; i++)`
176			`*p++ = 0x00;`
177			`*p++ = 0xff;`
178			`*p++ = 0xff;`
179			`/* Copy the IP v4 address. */`
180			`memcpy (p, tmp, INADDRSZ);`
181			`resbuf->h_addrtype = AF_INET6;`
182			`resbuf->h_length = IN6ADDRSZ;`
183			`}`
184			`else`
185			`{`
186			`resbuf->h_addrtype = af;`
187			`resbuf->h_length = addr_size;`
188			`}`
189			`if (h_errnop != NULL)`
190			`*h_errnop = NETDB_SUCCESS;`
191			`if (buffer_size == NULL)`
192			`*status = NSS_STATUS_SUCCESS;`
193			`else`
194			`*result = resbuf;`
195			`goto done;`
196			`}`
197
198			`if (!isdigit (cp) && cp != '.')`
199			`break;`
200			`}`
201			`}`
202
203			`if ((isxdigit (name[0]) && strchr (name, ':') != NULL) \|\| name[0] == ':')`
204			`{`
205			`const char *cp;`
206			`char *hostname;`
207			`typedef unsigned char host_addr_t[16];`
208			`host_addr_t *host_addr;`
209			`typedef char *host_addr_list_t[2];`
210			`host_addr_list_t *h_addr_ptrs;`
211			`size_t size_needed;`
212			`int addr_size;`
213
214			`switch (af)`
215			`{`
216			`default:`
217			`af = (_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET;`
218			`if (af == AF_INET6)`
219			`{`
220			`addr_size = IN6ADDRSZ;`
221			`break;`
222			`}`
223			`/* FALLTHROUGH */`
224
225			`case AF_INET:`
226			`/* This is not possible. We cannot represent an IPv6 address`
227			in an `struct in_addr' variable. */
228			`*h_errnop = HOST_NOT_FOUND;`
229			`*result = NULL;`
230			`goto done;`
231
232			`case AF_INET6:`
233			`addr_size = IN6ADDRSZ;`
234			`break;`
235			`}`
236
237			`size_needed = (sizeof (*host_addr)`
238			`+ sizeof (*h_addr_ptrs) + strlen (name) + 1);`
239
240			`if (buffer_size == NULL && buflen < size_needed)`
241			`{`
242			`if (h_errnop != NULL)`
243			`*h_errnop = TRY_AGAIN;`
244			`__set_errno (ERANGE);`
245			`goto done;`
246			`}`
247			`else if (buffer_size != NULL && *buffer_size < size_needed)`
248			`{`
249			`char *new_buf;`
250			`*buffer_size = size_needed;`
251			`new_buf = realloc (buffer, buffer_size);`
252
253			`if (new_buf == NULL)`
254			`{`
255			`save = errno;`
256			`free (*buffer);`
257			`__set_errno (save);`
258			`*buffer = NULL;`
259			`*buffer_size = 0;`
260			`*result = NULL;`
261			`goto done;`
262			`}`
263			`*buffer = new_buf;`
264			`}`
265
266			`memset (*buffer, '\0', size_needed);`
267
268			`host_addr = (host_addr_t ) buffer;`
269			`h_addr_ptrs = (host_addr_list_t *)`
270			`((char ) host_addr + sizeof (host_addr));`
271			`hostname = (char ) h_addr_ptrs + sizeof (h_addr_ptrs);`
272
273			`for (cp = name;; ++cp)`
274			`{`
275			`if (!*cp)`
276			`{`
277			`if (*--cp == '.')`
278			`break;`
279
280			`/* All-IPv6-legal, no dot at the end. Fake up a`
281			`hostent as if we'd actually done a lookup. */`
282			`if (inet_pton (AF_INET6, name, host_addr) <= 0)`
283			`{`
284			`*h_errnop = HOST_NOT_FOUND;`
285			`if (buffer_size)`
286			`*result = NULL;`
287			`goto done;`
288			`}`
289
290			`resbuf->h_name = strcpy (hostname, name);`
291			`h_alias_ptr[0] = NULL;`
292			`resbuf->h_aliases = h_alias_ptr;`
293			`(h_addr_ptrs)[0] = (char ) host_addr;`
294			`(h_addr_ptrs)[1] = (char ) 0;`
295			`resbuf->h_addr_list = *h_addr_ptrs;`
296			`resbuf->h_addrtype = AF_INET6;`
297			`resbuf->h_length = addr_size;`
298			`*h_errnop = NETDB_SUCCESS;`
299			`if (buffer_size == NULL)`
300			`*status = NSS_STATUS_SUCCESS;`
301			`else`
302			`*result = resbuf;`
303			`goto done;`
304			`}`
305
306			`if (!isxdigit (cp) && cp != ':' && *cp != '.')`
307			`break;`
308			`}`
309			`}`
310			`}`
311
312			`return 0;`
313
314			`done:`
315			`return 1;`
316			`}`
317			`libc_hidden_def (__nss_hostname_digits_dots)`