nis/nss_nis/nis-proto.c

   1 /* Copyright (C) 1996, 1997, 1998, 2000, 2001 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         {
 160           *errnop = ENOENT;
 161           return NSS_STATUS_NOTFOUND;
 162         }
 163       p = strncpy (buffer, next->val, buflen);
 164
 165       while (isspace (*p))
 166         ++p;
 167
 168       parse_res = _nss_files_parse_protoent (p, proto, data, buflen, errnop);
 169       if (parse_res == -1)
 170         return NSS_STATUS_TRYAGAIN;
 171       next = next->next;
 172     }
 173   while (!parse_res);
 174
 175   return NSS_STATUS_SUCCESS;
 176 }
 177
 178 enum nss_status
 179 _nss_nis_getprotoent_r (struct protoent *proto, char *buffer, size_t buflen,
 180                         int *errnop)
 181 {
 182   enum nss_status status;
 183
 184   __libc_lock_lock (lock);
 185
 186   status = internal_nis_getprotoent_r (proto, buffer, buflen, errnop);
 187
 188   __libc_lock_unlock (lock);
 189
 190   return status;
 191 }
 192
 193 enum nss_status
 194 _nss_nis_getprotobyname_r (const char *name, struct protoent *proto,
 195                            char *buffer, size_t buflen, int *errnop)
 196 {
 197   struct parser_data *data = (void *) buffer;
 198   enum nss_status retval;
 199   char *domain, *result, *p;
 200   int len, parse_res;
 201
 202   if (name == NULL)
 203     {
 204       *errnop = EINVAL;
 205       return NSS_STATUS_UNAVAIL;
 206     }
 207
 208   if (yp_get_default_domain (&domain))
 209     return NSS_STATUS_UNAVAIL;
 210
 211   retval = yperr2nss (yp_match (domain, "protocols.byname", name,
 212                                 strlen (name), &result, &len));
 213
 214   if (retval != NSS_STATUS_SUCCESS)
 215     {
 216       if (retval == NSS_STATUS_NOTFOUND)
 217         *errnop = ENOENT;
 218       else if (retval == NSS_STATUS_TRYAGAIN)
 219         *errnop = errno;
 220       return retval;
 221     }
 222
 223   if ((size_t) (len + 1) > buflen)
 224     {
 225       free (result);
 226       *errnop = ERANGE;
 227       return NSS_STATUS_TRYAGAIN;
 228     }
 229
 230   p = strncpy (buffer, result, len);
 231   buffer[len] = '\0';
 232   while (isspace (*p))
 233     ++p;
 234   free (result);
 235
 236   parse_res = _nss_files_parse_protoent (p, proto, data, buflen, errnop);
 237   if (parse_res < 1)
 238     {
 239       if (parse_res == -1)
 240         return NSS_STATUS_TRYAGAIN;
 241       else
 242         {
 243           *errnop = ENOENT;
 244           return NSS_STATUS_NOTFOUND;
 245         }
 246     }
 247   return NSS_STATUS_SUCCESS;
 248 }
 249
 250 enum nss_status
 251 _nss_nis_getprotobynumber_r (int number, struct protoent *proto,
 252                              char *buffer, size_t buflen, int *errnop)
 253 {
 254   struct parser_data *data = (void *) buffer;
 255   enum nss_status retval;
 256   char *domain, *result, *p;
 257   int len, nlen, parse_res;
 258   char buf[32];
 259
 260   if (yp_get_default_domain (&domain))
 261     return NSS_STATUS_UNAVAIL;
 262
 263   nlen = sprintf (buf, "%d", number);
 264
 265   retval = yperr2nss (yp_match (domain, "protocols.bynumber", buf,
 266                                 nlen, &result, &len));
 267
 268   if (retval != NSS_STATUS_SUCCESS)
 269     {
 270       if (retval == NSS_STATUS_NOTFOUND)
 271         *errnop = ENOENT;
 272       else if (retval == NSS_STATUS_TRYAGAIN)
 273         *errnop = errno;
 274       return retval;
 275     }
 276
 277   if ((size_t) (len + 1) > buflen)
 278     {
 279       free (result);
 280       *errnop = ERANGE;
 281       return NSS_STATUS_TRYAGAIN;
 282     }
 283
 284   p = strncpy (buffer, result, len);
 285   buffer[len] = '\0';
 286   while (isspace (*p))
 287     ++p;
 288   free (result);
 289
 290   parse_res = _nss_files_parse_protoent (p, proto, data, buflen, errnop);
 291   if (parse_res < 1)
 292     {
 293       if (parse_res == -1)
 294         return NSS_STATUS_TRYAGAIN;
 295       else
 296         {
 297           *errnop = ENOENT;
 298           return NSS_STATUS_NOTFOUND;
 299         }
 300     }
 301   return NSS_STATUS_SUCCESS;
 302 }