release/src/router/libevent/test/regress_dns.c

   1 /*
   2  * Copyright (c) 2003-2006 Niels Provos <provos@citi.umich.edu>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #ifdef WIN32
  29 #include <winsock2.h>
  30 #include <windows.h>
  31 #endif
  32
  33 #ifdef HAVE_CONFIG_H
  34 #include "config.h"
  35 #endif
  36
  37 #include <sys/types.h>
  38 #include <sys/stat.h>
  39 #ifdef HAVE_SYS_TIME_H
  40 #include <sys/time.h>
  41 #endif
  42 #include <sys/queue.h>
  43 #ifndef WIN32
  44 #include <sys/socket.h>
  45 #include <signal.h>
  46 #include <netinet/in.h>
  47 #include <arpa/inet.h>
  48 #include <unistd.h>
  49 #endif
  50 #ifdef HAVE_NETINET_IN6_H
  51 #include <netinet/in6.h>
  52 #endif
  53 #ifdef HAVE_NETDB_H
  54 #include <netdb.h>
  55 #endif
  56 #include <fcntl.h>
  57 #include <stdlib.h>
  58 #include <stdio.h>
  59 #include <string.h>
  60 #include <errno.h>
  61
  62 #include "event.h"
  63 #include "evdns.h"
  64 #include "log.h"
  65
  66 static int dns_ok = 0;
  67 static int dns_err = 0;
  68
  69 void dns_suite(void);
  70
  71 static void
  72 dns_gethostbyname_cb(int result, char type, int count, int ttl,
  73     void *addresses, void *arg)
  74 {
  75         dns_ok = dns_err = 0;
  76
  77         if (result == DNS_ERR_TIMEOUT) {
  78                 fprintf(stdout, "[Timed out] ");
  79                 dns_err = result;
  80                 goto out;
  81         }
  82
  83         if (result != DNS_ERR_NONE) {
  84                 fprintf(stdout, "[Error code %d] ", result);
  85                 goto out;
  86         }
  87
  88         fprintf(stderr, "type: %d, count: %d, ttl: %d: ", type, count, ttl);
  89
  90         switch (type) {
  91         case DNS_IPv6_AAAA: {
  92 #if defined(HAVE_STRUCT_IN6_ADDR) && defined(HAVE_INET_NTOP) && defined(INET6_ADDRSTRLEN)
  93                 struct in6_addr *in6_addrs = addresses;
  94                 char buf[INET6_ADDRSTRLEN+1];
  95                 int i;
  96                 /* a resolution that's not valid does not help */
  97                 if (ttl < 0)
  98                         goto out;
  99                 for (i = 0; i < count; ++i) {
 100                         const char *b = inet_ntop(AF_INET6, &in6_addrs[i], buf,sizeof(buf));
 101                         if (b)
 102                                 fprintf(stderr, "%s ", b);
 103                         else
 104                                 fprintf(stderr, "%s ", strerror(errno));
 105                 }
 106 #endif
 107                 break;
 108         }
 109         case DNS_IPv4_A: {
 110                 struct in_addr *in_addrs = addresses;
 111                 int i;
 112                 /* a resolution that's not valid does not help */
 113                 if (ttl < 0)
 114                         goto out;
 115                 for (i = 0; i < count; ++i)
 116                         fprintf(stderr, "%s ", inet_ntoa(in_addrs[i]));
 117                 break;
 118         }
 119         case DNS_PTR:
 120                 /* may get at most one PTR */
 121                 if (count != 1)
 122                         goto out;
 123
 124                 fprintf(stderr, "%s ", *(char **)addresses);
 125                 break;
 126         default:
 127                 goto out;
 128         }
 129
 130         dns_ok = type;
 131
 132 out:
 133         event_loopexit(NULL);
 134 }
 135
 136 static void
 137 dns_gethostbyname(void)
 138 {
 139         fprintf(stdout, "Simple DNS resolve: ");
 140         dns_ok = 0;
 141         evdns_resolve_ipv4("www.monkey.org", 0, dns_gethostbyname_cb, NULL);
 142         event_dispatch();
 143
 144         if (dns_ok == DNS_IPv4_A) {
 145                 fprintf(stdout, "OK\n");
 146         } else {
 147                 fprintf(stdout, "FAILED\n");
 148                 exit(1);
 149         }
 150 }
 151
 152 static void
 153 dns_gethostbyname6(void)
 154 {
 155         fprintf(stdout, "IPv6 DNS resolve: ");
 156         dns_ok = 0;
 157         evdns_resolve_ipv6("www.ietf.org", 0, dns_gethostbyname_cb, NULL);
 158         event_dispatch();
 159
 160         if (dns_ok == DNS_IPv6_AAAA) {
 161                 fprintf(stdout, "OK\n");
 162         } else if (!dns_ok && dns_err == DNS_ERR_TIMEOUT) {
 163                 fprintf(stdout, "SKIPPED\n");
 164         } else {
 165                 fprintf(stdout, "FAILED (%d)\n", dns_ok);
 166                 exit(1);
 167         }
 168 }
 169
 170 static void
 171 dns_gethostbyaddr(void)
 172 {
 173         struct in_addr in;
 174         in.s_addr = htonl(0x7f000001ul); /* 127.0.0.1 */
 175         fprintf(stdout, "Simple reverse DNS resolve: ");
 176         dns_ok = 0;
 177         evdns_resolve_reverse(&in, 0, dns_gethostbyname_cb, NULL);
 178         event_dispatch();
 179
 180         if (dns_ok == DNS_PTR) {
 181                 fprintf(stdout, "OK\n");
 182         } else {
 183                 fprintf(stdout, "FAILED\n");
 184                 exit(1);
 185         }
 186 }
 187
 188 static int n_server_responses = 0;
 189
 190 static void
 191 dns_server_request_cb(struct evdns_server_request *req, void *data)
 192 {
 193         int i, r;
 194         const char TEST_ARPA[] = "11.11.168.192.in-addr.arpa";
 195         for (i = 0; i < req->nquestions; ++i) {
 196                 struct in_addr ans;
 197                 ans.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
 198                 if (req->questions[i]->type == EVDNS_TYPE_A &&
 199                         req->questions[i]->dns_question_class == EVDNS_CLASS_INET &&
 200                         !strcmp(req->questions[i]->name, "zz.example.com")) {
 201                         r = evdns_server_request_add_a_reply(req, "zz.example.com",
 202                                                                                                  1, &ans.s_addr, 12345);
 203                         if (r<0)
 204                                 dns_ok = 0;
 205                 } else if (req->questions[i]->type == EVDNS_TYPE_AAAA &&
 206                                    req->questions[i]->dns_question_class == EVDNS_CLASS_INET &&
 207                                    !strcmp(req->questions[i]->name, "zz.example.com")) {
 208                         char addr6[17] = "abcdefghijklmnop";
 209                         r = evdns_server_request_add_aaaa_reply(req, "zz.example.com",
 210                                                                                                  1, addr6, 123);
 211                         if (r<0)
 212                                 dns_ok = 0;
 213                 } else if (req->questions[i]->type == EVDNS_TYPE_PTR &&
 214                                    req->questions[i]->dns_question_class == EVDNS_CLASS_INET &&
 215                                    !strcmp(req->questions[i]->name, TEST_ARPA)) {
 216                         r = evdns_server_request_add_ptr_reply(req, NULL, TEST_ARPA,
 217                                            "ZZ.EXAMPLE.COM", 54321);
 218                         if (r<0)
 219                                 dns_ok = 0;
 220                 } else {
 221                         fprintf(stdout, "Unexpected question %d %d \"%s\" ",
 222                                         req->questions[i]->type,
 223                                         req->questions[i]->dns_question_class,
 224                                         req->questions[i]->name);
 225                         dns_ok = 0;
 226                 }
 227         }
 228         r = evdns_server_request_respond(req, 0);
 229         if (r<0) {
 230                 fprintf(stdout, "Couldn't send reply. ");
 231                 dns_ok = 0;
 232         }
 233 }
 234
 235 static void
 236 dns_server_gethostbyname_cb(int result, char type, int count, int ttl,
 237                                                         void *addresses, void *arg)
 238 {
 239         if (result != DNS_ERR_NONE) {
 240                 fprintf(stdout, "Unexpected result %d. ", result);
 241                 dns_ok = 0;
 242                 goto out;
 243         }
 244         if (count != 1) {
 245                 fprintf(stdout, "Unexpected answer count %d. ", count);
 246                 dns_ok = 0;
 247                 goto out;
 248         }
 249         switch (type) {
 250         case DNS_IPv4_A: {
 251                 struct in_addr *in_addrs = addresses;
 252                 if (in_addrs[0].s_addr != htonl(0xc0a80b0bUL) || ttl != 12345) {
 253                         fprintf(stdout, "Bad IPv4 response \"%s\" %d. ",
 254                                         inet_ntoa(in_addrs[0]), ttl);
 255                         dns_ok = 0;
 256                         goto out;
 257                 }
 258                 break;
 259         }
 260         case DNS_IPv6_AAAA: {
 261 #if defined (HAVE_STRUCT_IN6_ADDR) && defined(HAVE_INET_NTOP) && defined(INET6_ADDRSTRLEN)
 262                 struct in6_addr *in6_addrs = addresses;
 263                 char buf[INET6_ADDRSTRLEN+1];
 264                 if (memcmp(&in6_addrs[0].s6_addr, "abcdefghijklmnop", 16)
 265                         || ttl != 123) {
 266                         const char *b = inet_ntop(AF_INET6, &in6_addrs[0],buf,sizeof(buf));
 267                         fprintf(stdout, "Bad IPv6 response \"%s\" %d. ", b, ttl);
 268                         dns_ok = 0;
 269                         goto out;
 270                 }
 271 #endif
 272                 break;
 273         }
 274         case DNS_PTR: {
 275                 char **addrs = addresses;
 276                 if (strcmp(addrs[0], "ZZ.EXAMPLE.COM") || ttl != 54321) {
 277                         fprintf(stdout, "Bad PTR response \"%s\" %d. ",
 278                                         addrs[0], ttl);
 279                         dns_ok = 0;
 280                         goto out;
 281                 }
 282                 break;
 283         }
 284         default:
 285                 fprintf(stdout, "Bad response type %d. ", type);
 286                 dns_ok = 0;
 287         }
 288
 289  out:
 290         if (++n_server_responses == 3) {
 291                 event_loopexit(NULL);
 292         }
 293 }
 294
 295 static void
 296 dns_server(void)
 297 {
 298         int sock;
 299         struct sockaddr_in my_addr;
 300         struct evdns_server_port *port;
 301         struct in_addr resolve_addr;
 302
 303         dns_ok = 1;
 304         fprintf(stdout, "DNS server support: ");
 305
 306         /* Add ourself as the only nameserver, and make sure we really are
 307          * the only nameserver. */
 308         evdns_nameserver_ip_add("127.0.0.1:35353");
 309         if (evdns_count_nameservers() != 1) {
 310                 fprintf(stdout, "Couldn't set up.\n");
 311                 exit(1);
 312         }
 313
 314         /* Now configure a nameserver port. */
 315         sock = socket(AF_INET, SOCK_DGRAM, 0);
 316         if (sock == -1) {
 317                 perror("socket");
 318                 exit(1);
 319         }
 320 #ifdef WIN32
 321         {
 322                 u_long nonblocking = 1;
 323                 ioctlsocket(sock, FIONBIO, &nonblocking);
 324         }
 325 #else
 326         fcntl(sock, F_SETFL, O_NONBLOCK);
 327 #endif
 328         memset(&my_addr, 0, sizeof(my_addr));
 329         my_addr.sin_family = AF_INET;
 330         my_addr.sin_port = htons(35353);
 331         my_addr.sin_addr.s_addr = htonl(0x7f000001UL);
 332         if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr)) < 0) {
 333                 perror("bind");
 334                 exit (1);
 335         }
 336         port = evdns_add_server_port(sock, 0, dns_server_request_cb, NULL);
 337
 338         /* Send two queries. */
 339         evdns_resolve_ipv4("zz.example.com", DNS_QUERY_NO_SEARCH,
 340                                            dns_server_gethostbyname_cb, NULL);
 341         evdns_resolve_ipv6("zz.example.com", DNS_QUERY_NO_SEARCH,
 342                                            dns_server_gethostbyname_cb, NULL);
 343         resolve_addr.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
 344         evdns_resolve_reverse(&resolve_addr, 0,
 345                                                   dns_server_gethostbyname_cb, NULL);
 346
 347         event_dispatch();
 348
 349         if (dns_ok) {
 350                 fprintf(stdout, "OK\n");
 351         } else {
 352                 fprintf(stdout, "FAILED\n");
 353                 exit(1);
 354         }
 355
 356         evdns_close_server_port(port);
 357         evdns_shutdown(0); /* remove ourself as nameserver. */
 358 #ifdef WIN32
 359         closesocket(sock);
 360 #else
 361         close(sock);
 362 #endif
 363 }
 364
 365 void
 366 dns_suite(void)
 367 {
 368         dns_server(); /* Do this before we call evdns_init. */
 369
 370         evdns_init();
 371         dns_gethostbyname();
 372         dns_gethostbyname6();
 373         dns_gethostbyaddr();
 374
 375         evdns_shutdown(0);
 376 }