nis/nss_nis/nis-proto.c

   1 /* Copyright (C) 1996,1997,1998,2000,2001,2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
   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 <nss.h>
  21 #include <netdb.h>
  22 #include <ctype.h>
  23 #include <errno.h>
  24 #include <string.h>
  25 #include <bits/libc-lock.h>
  26 #include <rpcsvc/yp.h>
  27 #include <rpcsvc/ypclnt.h>
  28
  29 #include "nss-nis.h"
  30
  31 /* Get the declaration of the parser function.  */
  32 #define ENTNAME protoent
  33 #define EXTERN_PARSER
  34 #include <nss/nss_files/files-parse.c>
  35
  36 __libc_lock_define_initialized (static, lock)
  37
  38 struct response
  39 {
  40   char *val;
  41   struct response *next;
  42 };
  43
  44 static struct response *start;
  45 static struct response *next;
  46
  47 static int
  48 saveit (int instatus, char *inkey, int inkeylen, char *inval,
  49         int invallen, char *indata)
  50 {
  51   if (instatus != YP_TRUE)
  52     return instatus;
  53
  54   if (inkey && inkeylen > 0 && inval && invallen > 0)
  55     {
  56       if (start == NULL)
  57         {
  58           start = malloc (sizeof (struct response));
  59           if (start == NULL)
  60             return YP_FALSE;
  61           next = start;
  62         }
  63       else
  64         {
  65           next->next = malloc (sizeof (struct response));
  66           if (next->next == NULL)
  67             return YP_FALSE;
  68           next = next->next;
  69         }
  70       next->next = NULL;
  71       next->val = malloc (invallen + 1);
  72       if (next->val == NULL)
  73         return YP_FALSE;
  74       strncpy (next->val, inval, invallen);
  75       next->val[invallen] = '\0';
  76     }
  77
  78   return 0;
  79 }
  80
  81 static enum nss_status
  82 internal_nis_setprotoent (void)
  83 {
  84   char *domainname;
  85   struct ypall_callback ypcb;
  86   enum nss_status status;
  87
  88   yp_get_default_domain (&domainname);
  89
  90   while (start != NULL)
  91     {
  92       if (start->val != NULL)
  93         free (start->val);
  94       next = start;
  95       start = start->next;
  96       free (next);
  97     }
  98   start = NULL;
  99
 100   ypcb.foreach = saveit;
 101   ypcb.data = NULL;
 102   status = yperr2nss (yp_all (domainname, "protocols.bynumber", &ypcb));
 103   next = start;
 104
 105   return status;
 106 }
 107
 108 enum nss_status
 109 _nss_nis_setprotoent (int stayopen)
 110 {
 111   enum nss_status status;
 112
 113   __libc_lock_lock (lock);
 114
 115   status = internal_nis_setprotoent ();
 116
 117   __libc_lock_unlock (lock);
 118
 119   return status;
 120 }
 121
 122 enum nss_status
 123 _nss_nis_endprotoent (void)
 124 {
 125   __libc_lock_lock (lock);
 126
 127   while (start != NULL)
 128     {
 129       if (start->val != NULL)
 130         free (start->val);
 131       next = start;
 132       start = start->next;
 133       free (next);
 134     }
 135   start = NULL;
 136   next = NULL;
 137
 138   __libc_lock_unlock (lock);
 139
 140   return NSS_STATUS_SUCCESS;
 141 }
 142
 143 static enum nss_status
 144 internal_nis_getprotoent_r (struct protoent *proto,
 145                             char *buffer, size_t buflen, int *errnop)
 146 {
 147   struct parser_data *data = (void *) buffer;
 148   int parse_res;
 149
 150   if (start == NULL)
 151     internal_nis_setprotoent ();
 152
 153   /* Get the next entry until we found a correct one. */
 154   do
 155     {
 156       char *p;
 157
 158       if (next == NULL)
 159         return NSS_STATUS_NOTFOUND;
 160
 161       p = strncpy (buffer, next->val, buflen);
 162
 163       while (isspace (*p))
 164         ++p;
 165
 166       parse_res = _nss_files_parse_protoent (p, proto, data, buflen, errnop);
 167       if (parse_res == -1)
 168         return NSS_STATUS_TRYAGAIN;
 169       next = next->next;
 170     }
 171   while (!parse_res);
 172
 173   return NSS_STATUS_SUCCESS;
 174 }
 175
 176 enum nss_status
 177 _nss_nis_getprotoent_r (struct protoent *proto, char *buffer, size_t buflen,
 178                         int *errnop)
 179 {
 180   enum nss_status status;
 181
 182   __libc_lock_lock (lock);
 183
 184   status = internal_nis_getprotoent_r (proto, buffer, buflen, errnop);
 185
 186   __libc_lock_unlock (lock);
 187
 188   return status;
 189 }
 190
 191 enum nss_status
 192 _nss_nis_getprotobyname_r (const char *name, struct protoent *proto,
 193                            char *buffer, size_t buflen, int *errnop)
 194 {
 195   struct parser_data *data = (void *) buffer;
 196   enum nss_status retval;
 197   char *domain, *result, *p;
 198   int len, parse_res;
 199
 200   if (name == NULL)
 201     {
 202       *errnop = EINVAL;
 203       return NSS_STATUS_UNAVAIL;
 204     }
 205
 206   if (yp_get_default_domain (&domain))
 207     return NSS_STATUS_UNAVAIL;
 208
 209   retval = yperr2nss (yp_match (domain, "protocols.byname", name,
 210                                 strlen (name), &result, &len));
 211
 212   if (retval != NSS_STATUS_SUCCESS)
 213     {
 214       if (retval == NSS_STATUS_TRYAGAIN)
 215         *errnop = errno;
 216       return retval;
 217     }
 218
 219   if ((size_t) (len + 1) > buflen)
 220     {
 221       free (result);
 222       *errnop = ERANGE;
 223       return NSS_STATUS_TRYAGAIN;
 224     }
 225
 226   p = strncpy (buffer, result, len);
 227   buffer[len] = '\0';
 228   while (isspace (*p))
 229     ++p;
 230   free (result);
 231
 232   parse_res = _nss_files_parse_protoent (p, proto, data, buflen, errnop);
 233   if (parse_res < 1)
 234     {
 235       if (parse_res == -1)
 236         return NSS_STATUS_TRYAGAIN;
 237       else
 238         return NSS_STATUS_NOTFOUND;
 239     }
 240   return NSS_STATUS_SUCCESS;
 241 }
 242
 243 enum nss_status
 244 _nss_nis_getprotobynumber_r (int number, struct protoent *proto,
 245                              char *buffer, size_t buflen, int *errnop)
 246 {
 247   struct parser_data *data = (void *) buffer;
 248   enum nss_status retval;
 249   char *domain, *result, *p;
 250   int len, nlen, parse_res;
 251   char buf[32];
 252
 253   if (yp_get_default_domain (&domain))
 254     return NSS_STATUS_UNAVAIL;
 255
 256   nlen = sprintf (buf, "%d", number);
 257
 258   retval = yperr2nss (yp_match (domain, "protocols.bynumber", buf,
 259                                 nlen, &result, &len));
 260
 261   if (retval != NSS_STATUS_SUCCESS)
 262     {
 263       if (retval == NSS_STATUS_TRYAGAIN)
 264         *errnop = errno;
 265       return retval;
 266     }
 267
 268   if ((size_t) (len + 1) > buflen)
 269     {
 270       free (result);
 271       *errnop = ERANGE;
 272       return NSS_STATUS_TRYAGAIN;
 273     }
 274
 275   p = strncpy (buffer, result, len);
 276   buffer[len] = '\0';
 277   while (isspace (*p))
 278     ++p;
 279   free (result);
 280
 281   parse_res = _nss_files_parse_protoent (p, proto, data, buflen, errnop);
 282   if (parse_res < 1)
 283     {
 284       if (parse_res == -1)
 285         return NSS_STATUS_TRYAGAIN;
 286       else
 287         return NSS_STATUS_NOTFOUND;
 288     }
 289   return NSS_STATUS_SUCCESS;
 290 }