nis/nss_nis/nis-proto.c

   1 /* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 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 = NULL;
  45 static struct response *next = NULL;
  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           next = start;
  60         }
  61       else
  62         {
  63           next->next = malloc (sizeof (struct response));
  64           next = next->next;
  65         }
  66       next->next = NULL;
  67       next->val = malloc (invallen + 1);
  68       strncpy (next->val, inval, invallen);
  69       next->val[invallen] = '\0';
  70     }
  71
  72   return 0;
  73 }
  74
  75 static enum nss_status
  76 internal_nis_setprotoent (void)
  77 {
  78   char *domainname;
  79   struct ypall_callback ypcb;
  80   enum nss_status status;
  81
  82   yp_get_default_domain (&domainname);
  83
  84   while (start != NULL)
  85     {
  86       if (start->val != NULL)
  87         free (start->val);
  88       next = start;
  89       start = start->next;
  90       free (next);
  91     }
  92   start = NULL;
  93
  94   ypcb.foreach = saveit;
  95   ypcb.data = NULL;
  96   status = yperr2nss (yp_all (domainname, "protocols.bynumber", &ypcb));
  97   next = start;
  98
  99   return status;
 100 }
 101
 102 enum nss_status
 103 _nss_nis_setprotoent (void)
 104 {
 105   enum nss_status status;
 106
 107   __libc_lock_lock (lock);
 108
 109   status = internal_nis_setprotoent ();
 110
 111   __libc_lock_unlock (lock);
 112
 113   return status;
 114 }
 115
 116 enum nss_status
 117 _nss_nis_endprotoent (void)
 118 {
 119   __libc_lock_lock (lock);
 120
 121   while (start != NULL)
 122     {
 123       if (start->val != NULL)
 124         free (start->val);
 125       next = start;
 126       start = start->next;
 127       free (next);
 128     }
 129   start = NULL;
 130   next = NULL;
 131
 132   __libc_lock_unlock (lock);
 133
 134   return NSS_STATUS_SUCCESS;
 135 }
 136
 137 static enum nss_status
 138 internal_nis_getprotoent_r (struct protoent *proto,
 139                             char *buffer, size_t buflen, int *errnop)
 140 {
 141   struct parser_data *data = (void *) buffer;
 142   int parse_res;
 143
 144   if (start == NULL)
 145     internal_nis_setprotoent ();
 146
 147   /* Get the next entry until we found a correct one. */
 148   do
 149     {
 150       char *p;
 151
 152       if (next == NULL)
 153         return NSS_STATUS_NOTFOUND;
 154       p = strcpy (buffer, next->val);
 155
 156       while (isspace (*p))
 157         ++p;
 158
 159       parse_res = _nss_files_parse_protoent (p, proto, data, buflen, errnop);
 160       if (parse_res == -1)
 161         return NSS_STATUS_TRYAGAIN;
 162       next = next->next;
 163     }
 164   while (!parse_res);
 165
 166   return NSS_STATUS_SUCCESS;
 167 }
 168
 169 enum nss_status
 170 _nss_nis_getprotoent_r (struct protoent *proto, char *buffer, size_t buflen,
 171                         int *errnop)
 172 {
 173   enum nss_status status;
 174
 175   __libc_lock_lock (lock);
 176
 177   status = internal_nis_getprotoent_r (proto, buffer, buflen, errnop);
 178
 179   __libc_lock_unlock (lock);
 180
 181   return status;
 182 }
 183
 184 enum nss_status
 185 _nss_nis_getprotobyname_r (const char *name, struct protoent *proto,
 186                            char *buffer, size_t buflen, int *errnop)
 187 {
 188   struct parser_data *data = (void *) buffer;
 189   enum nss_status retval;
 190   char *domain, *result, *p;
 191   int len, parse_res;
 192
 193   if (name == NULL)
 194     {
 195       __set_errno (EINVAL);
 196       return NSS_STATUS_UNAVAIL;
 197     }
 198
 199   if (yp_get_default_domain (&domain))
 200     return NSS_STATUS_UNAVAIL;
 201
 202   retval = yperr2nss (yp_match (domain, "protocols.byname", name,
 203                                 strlen (name), &result, &len));
 204
 205   if (retval != NSS_STATUS_SUCCESS)
 206     {
 207       if (retval == NSS_STATUS_TRYAGAIN)
 208         *errnop = errno;
 209       return retval;
 210     }
 211
 212   if ((size_t) (len + 1) > buflen)
 213     {
 214       free (result);
 215       *errnop = ERANGE;
 216       return NSS_STATUS_TRYAGAIN;
 217     }
 218
 219   p = strncpy (buffer, result, len);
 220   buffer[len] = '\0';
 221   while (isspace (*p))
 222     ++p;
 223   free (result);
 224
 225   parse_res = _nss_files_parse_protoent (p, proto, data, buflen, errnop);
 226   if (parse_res == -1)
 227     return NSS_STATUS_TRYAGAIN;
 228
 229   if (parse_res)
 230     return NSS_STATUS_SUCCESS;
 231   else
 232     return NSS_STATUS_NOTFOUND;
 233 }
 234
 235 enum nss_status
 236 _nss_nis_getprotobynumber_r (int number, struct protoent *proto,
 237                              char *buffer, size_t buflen, int *errnop)
 238 {
 239   struct parser_data *data = (void *) buffer;
 240   enum nss_status retval;
 241   char *domain, *result, *p;
 242   int len, nlen, parse_res;
 243   char buf[32];
 244
 245   if (yp_get_default_domain (&domain))
 246     return NSS_STATUS_UNAVAIL;
 247
 248   nlen = sprintf (buf, "%d", number);
 249
 250   retval = yperr2nss (yp_match (domain, "protocols.bynumber", buf,
 251                                 nlen, &result, &len));
 252
 253   if (retval != NSS_STATUS_SUCCESS)
 254     {
 255       if (retval == NSS_STATUS_TRYAGAIN)
 256         *errnop = errno;
 257       return retval;
 258     }
 259
 260   if ((size_t) (len + 1) > buflen)
 261     {
 262       free (result);
 263       *errnop = ERANGE;
 264       return NSS_STATUS_TRYAGAIN;
 265     }
 266
 267   p = strncpy (buffer, result, len);
 268   buffer[len] = '\0';
 269   while (isspace (*p))
 270     ++p;
 271   free (result);
 272
 273   parse_res = _nss_files_parse_protoent (p, proto, data, buflen, errnop);
 274   if (parse_res == -1)
 275     return NSS_STATUS_TRYAGAIN;
 276
 277   if (parse_res)
 278     return NSS_STATUS_SUCCESS;
 279   else
 280     return NSS_STATUS_NOTFOUND;
 281 }