nss/test-netdb.c

   1 /* Copyright (C) 1998-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Andreas Jaeger <aj@suse.de>, 1998.
   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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 /*
  20   Testing of some network related lookup functions.
  21   The system databases looked up are:
  22   - /etc/services
  23   - /etc/hosts
  24   - /etc/networks
  25   - /etc/protocols
  26   The tests try to be fairly generic and simple so that they work on
  27   every possible setup (and might therefore not detect some possible
  28   errors).
  29 */
  30
  31 #include <netdb.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <arpa/inet.h>
  36 #include <netinet/in.h>
  37 #include <sys/param.h>
  38 #include <sys/socket.h>
  39 #include <unistd.h>
  40 #include <errno.h>
  41 #include "nss.h"
  42
  43 #include <support/support.h>
  44
  45 /*
  46   The following define is necessary for glibc 2.0.6
  47 */
  48 #ifndef INET6_ADDRSTRLEN
  49 # define INET6_ADDRSTRLEN 46
  50 #endif
  51
  52 int error_count;
  53
  54 static void
  55 output_servent (const char *call, struct servent *sptr)
  56 {
  57   char **pptr;
  58
  59   if (sptr == NULL)
  60     printf ("Call: %s returned NULL\n", call);
  61   else
  62     {
  63       printf ("Call: %s, returned: s_name: %s, s_port: %d, s_proto: %s\n",
  64               call, sptr->s_name, ntohs(sptr->s_port), sptr->s_proto);
  65       for (pptr = sptr->s_aliases; *pptr != NULL; pptr++)
  66         printf ("  alias: %s\n", *pptr);
  67     }
  68 }
  69
  70
  71 static void
  72 test_services (void)
  73 {
  74   struct servent *sptr;
  75
  76   sptr = getservbyname ("domain", "tcp");
  77   output_servent ("getservbyname (\"domain\", \"tcp\")", sptr);
  78
  79   sptr = getservbyname ("domain", "udp");
  80   output_servent ("getservbyname (\"domain\", \"udp\")", sptr);
  81
  82   sptr = getservbyname ("domain", NULL);
  83   output_servent ("getservbyname (\"domain\", NULL)", sptr);
  84
  85   sptr = getservbyname ("not-existant", NULL);
  86   output_servent ("getservbyname (\"not-existant\", NULL)", sptr);
  87
  88   /* This shouldn't return anything.  */
  89   sptr = getservbyname ("", "");
  90   output_servent ("getservbyname (\"\", \"\")", sptr);
  91
  92   sptr = getservbyname ("", "tcp");
  93   output_servent ("getservbyname (\"\", \"tcp\")", sptr);
  94
  95   sptr = getservbyport (htons(53), "tcp");
  96   output_servent ("getservbyport (htons(53), \"tcp\")", sptr);
  97
  98   sptr = getservbyport (htons(53), NULL);
  99   output_servent ("getservbyport (htons(53), NULL)", sptr);
 100
 101   sptr = getservbyport (htons(1), "udp"); /* shouldn't exist */
 102   output_servent ("getservbyport (htons(1), \"udp\")", sptr);
 103
 104   setservent (0);
 105   do
 106     {
 107       sptr = getservent ();
 108       output_servent ("getservent ()", sptr);
 109     }
 110   while (sptr != NULL);
 111   endservent ();
 112 }
 113
 114
 115 static void
 116 output_hostent (const char *call, struct hostent *hptr)
 117 {
 118   char **pptr;
 119   char buf[INET6_ADDRSTRLEN];
 120
 121   if (hptr == NULL)
 122     printf ("Call: %s returned NULL\n", call);
 123   else
 124     {
 125       printf ("Call: %s returned: name: %s, addr_type: %d\n",
 126               call, hptr->h_name, hptr->h_addrtype);
 127       if (hptr->h_aliases)
 128         for (pptr = hptr->h_aliases; *pptr != NULL; pptr++)
 129           printf ("  alias: %s\n", *pptr);
 130
 131       for (pptr = hptr->h_addr_list; *pptr != NULL; pptr++)
 132         printf ("  ip: %s\n",
 133                 inet_ntop (hptr->h_addrtype, *pptr, buf, sizeof (buf)));
 134     }
 135 }
 136
 137 static void
 138 test_hosts (void)
 139 {
 140   struct hostent *hptr1, *hptr2;
 141   char *name = NULL;
 142   size_t namelen = 0;
 143   struct in_addr ip;
 144
 145   hptr1 = gethostbyname ("localhost");
 146   hptr2 = gethostbyname ("LocalHost");
 147   if (hptr1 != NULL || hptr2 != NULL)
 148     {
 149       if (hptr1 == NULL)
 150         {
 151           printf ("localhost not found - but LocalHost found:-(\n");
 152           ++error_count;
 153         }
 154       else if (hptr2 == NULL)
 155         {
 156           printf ("LocalHost not found - but localhost found:-(\n");
 157           ++error_count;
 158         }
 159       else if (strcmp (hptr1->h_name, hptr2->h_name) != 0)
 160         {
 161           printf ("localhost and LocalHost have different canoncial name\n");
 162           printf ("gethostbyname (\"localhost\")->%s\n", hptr1->h_name);
 163           printf ("gethostbyname (\"LocalHost\")->%s\n", hptr2->h_name);
 164           ++error_count;
 165         }
 166       else
 167         output_hostent ("gethostbyname(\"localhost\")", hptr1);
 168     }
 169
 170   hptr1 = gethostbyname ("127.0.0.1");
 171   output_hostent ("gethostbyname (\"127.0.0.1\")", hptr1);
 172
 173   hptr1 = gethostbyname ("10.1234");
 174   output_hostent ("gethostbyname (\"10.1234\")", hptr1);
 175
 176   hptr1 = gethostbyname2 ("localhost", AF_INET);
 177   output_hostent ("gethostbyname2 (\"localhost\", AF_INET)", hptr1);
 178
 179   while (gethostname (name, namelen) < 0 && errno == ENAMETOOLONG)
 180     {
 181       namelen += 2;             /* tiny increments to test a lot */
 182       name = xrealloc (name, namelen);
 183     }
 184   if (gethostname (name, namelen) == 0)
 185     {
 186       printf ("Hostname: %s\n", name);
 187       if (name != NULL)
 188         {
 189           hptr1 = gethostbyname (name);
 190           output_hostent ("gethostbyname (gethostname(...))", hptr1);
 191         }
 192     }
 193
 194   ip.s_addr = htonl (INADDR_LOOPBACK);
 195   hptr1 = gethostbyaddr ((char *) &ip, sizeof (ip), AF_INET);
 196   if (hptr1 != NULL)
 197     {
 198       printf ("official name of 127.0.0.1: %s\n", hptr1->h_name);
 199     }
 200
 201   sethostent (0);
 202   do
 203     {
 204       hptr1 = gethostent ();
 205       output_hostent ("gethostent ()", hptr1);
 206     }
 207   while (hptr1 != NULL);
 208   endhostent ();
 209
 210 }
 211
 212
 213 static void
 214 output_netent (const char *call, struct netent *nptr)
 215 {
 216   char **pptr;
 217
 218   if (nptr == NULL)
 219     printf ("Call: %s returned NULL\n", call);
 220   else
 221     {
 222       struct in_addr ip;
 223
 224       ip.s_addr = htonl(nptr->n_net);
 225       printf ("Call: %s, returned: n_name: %s, network_number: %s\n",
 226               call, nptr->n_name, inet_ntoa (ip));
 227
 228       for (pptr = nptr->n_aliases; *pptr != NULL; pptr++)
 229         printf ("  alias: %s\n", *pptr);
 230     }
 231 }
 232
 233 static void
 234 test_network (void)
 235 {
 236   struct netent *nptr;
 237   uint32_t ip;
 238
 239   /*
 240      This test needs the following line in /etc/networks:
 241      loopback        127.0.0.0
 242   */
 243   nptr = getnetbyname ("loopback");
 244   output_netent ("getnetbyname (\"loopback\")",nptr);
 245
 246   nptr = getnetbyname ("LoopBACK");
 247   output_netent ("getnetbyname (\"LoopBACK\")",nptr);
 248
 249   ip = inet_network ("127.0.0.0");
 250   nptr = getnetbyaddr (ip, AF_INET);
 251   output_netent ("getnetbyaddr (inet_network (\"127.0.0.0\"), AF_INET)",nptr);
 252
 253   setnetent (0);
 254   do
 255     {
 256       nptr = getnetent ();
 257       output_netent ("getnetent ()", nptr);
 258     }
 259   while (nptr != NULL);
 260   endnetent ();
 261 }
 262
 263
 264 static void
 265 output_protoent (const char *call, struct protoent *prptr)
 266 {
 267   char **pptr;
 268
 269   if (prptr == NULL)
 270     printf ("Call: %s returned NULL\n", call);
 271   else
 272     {
 273       printf ("Call: %s, returned: p_name: %s, p_proto: %d\n",
 274               call, prptr->p_name, prptr->p_proto);
 275       for (pptr = prptr->p_aliases; *pptr != NULL; pptr++)
 276         printf ("  alias: %s\n", *pptr);
 277     }
 278 }
 279
 280
 281 static void
 282 test_protocols (void)
 283 {
 284   struct protoent *prptr;
 285
 286   prptr = getprotobyname ("IP");
 287   output_protoent ("getprotobyname (\"IP\")", prptr);
 288
 289   prptr = getprotobynumber (1);
 290   output_protoent ("getprotobynumber (1)", prptr);
 291
 292   setprotoent (0);
 293   do
 294     {
 295       prptr = getprotoent ();
 296       output_protoent ("getprotoent ()", prptr);
 297     }
 298   while (prptr != NULL);
 299   endprotoent ();
 300 }
 301
 302
 303 /* Override /etc/nsswitch.conf for this program.  This is mainly
 304    useful for developers. */
 305 static void  __attribute__ ((unused))
 306 setdb (const char *dbname)
 307 {
 308   if (strcmp ("db", dbname))
 309       {
 310         /*
 311           db is not implemented for hosts, networks
 312         */
 313         __nss_configure_lookup ("hosts", dbname);
 314         __nss_configure_lookup ("networks", dbname);
 315       }
 316   __nss_configure_lookup ("protocols", dbname);
 317   __nss_configure_lookup ("services", dbname);
 318 }
 319
 320
 321 static int
 322 do_test (void)
 323 {
 324   /*
 325     setdb ("db");
 326   */
 327
 328   test_hosts ();
 329   test_network ();
 330   test_protocols ();
 331   test_services ();
 332
 333   if (error_count)
 334     printf ("\n %d errors occurred!\n", error_count);
 335   else
 336     printf ("No visible errors occurred!\n");
 337
 338   return (error_count != 0);
 339 }
 340
 341 #include <support/test-driver.c>