external/bsd/bind/dist/lib/export/samples/sample.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2009  Internet Systems Consortium, Inc. ("ISC")
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  11  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  12  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  13  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  14  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  15  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  16  * PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 /* Id: sample.c,v 1.5 2009/09/29 15:06:07 fdupont Exp */
  20
  21 #include <config.h>
  22
  23 #include <sys/types.h>
  24 #include <sys/socket.h>
  25
  26 #include <netinet/in.h>
  27
  28 #include <arpa/inet.h>
  29
  30 #include <unistd.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <netdb.h>
  35
  36 #include <isc/base64.h>
  37 #include <isc/buffer.h>
  38 #include <isc/lib.h>
  39 #include <isc/mem.h>
  40 #include <isc/sockaddr.h>
  41 #include <isc/util.h>
  42
  43 #include <dns/client.h>
  44 #include <dns/fixedname.h>
  45 #include <dns/keyvalues.h>
  46 #include <dns/lib.h>
  47 #include <dns/name.h>
  48 #include <dns/rdata.h>
  49 #include <dns/rdataset.h>
  50 #include <dns/rdatastruct.h>
  51 #include <dns/rdatatype.h>
  52 #include <dns/result.h>
  53 #include <dns/secalg.h>
  54
  55 #include <dst/dst.h>
  56
  57 static char *algname;
  58
  59 static isc_result_t
  60 printdata(dns_rdataset_t *rdataset, dns_name_t *owner) {
  61         isc_buffer_t target;
  62         isc_result_t result;
  63         isc_region_t r;
  64         char t[4096];
  65
  66         if (!dns_rdataset_isassociated(rdataset)) {
  67                 printf("[WARN: empty]\n");
  68                 return (ISC_R_SUCCESS);
  69         }
  70
  71         isc_buffer_init(&target, t, sizeof(t));
  72
  73         result = dns_rdataset_totext(rdataset, owner, ISC_FALSE, ISC_FALSE,
  74                                      &target);
  75         if (result != ISC_R_SUCCESS)
  76                 return (result);
  77         isc_buffer_usedregion(&target, &r);
  78         printf("%.*s", (int)r.length, (char *)r.base);
  79
  80         return (ISC_R_SUCCESS);
  81 }
  82
  83 ISC_PLATFORM_NORETURN_PRE static void
  84 usage(void) ISC_PLATFORM_NORETURN_POST;
  85
  86 static void
  87 usage(void) {
  88         fprintf(stderr, "sample [-t RRtype] "
  89                 "[[-a algorithm] [-e] -k keyname -K keystring] "
  90                 "[-s domain:serveraddr_for_domain ] "
  91                 "server_address hostname\n");
  92
  93         exit(1);
  94 }
  95
  96 static void
  97 set_key(dns_client_t *client, char *keynamestr, char *keystr,
  98         isc_boolean_t is_sep, isc_mem_t **mctxp)
  99 {
 100         isc_result_t result;
 101         dns_fixedname_t fkeyname;
 102         size_t namelen;
 103         dns_name_t *keyname;
 104         dns_rdata_dnskey_t keystruct;
 105         unsigned char keydata[4096];
 106         isc_buffer_t keydatabuf;
 107         unsigned char rrdata[4096];
 108         isc_buffer_t rrdatabuf;
 109         isc_buffer_t b;
 110         isc_textregion_t tr;
 111         isc_region_t r;
 112         dns_secalg_t alg;
 113
 114         result = isc_mem_create(0, 0, mctxp);
 115         if (result != ISC_R_SUCCESS) {
 116                 fprintf(stderr, "failed to crate mctx\n");
 117                 exit(1);
 118         }
 119
 120         if (algname != NULL) {
 121                 tr.base = algname;
 122                 tr.length = strlen(algname);
 123                 result = dns_secalg_fromtext(&alg, &tr);
 124                 if (result != ISC_R_SUCCESS) {
 125                         fprintf(stderr, "failed to identify the algorithm\n");
 126                         exit(1);
 127                 }
 128         } else
 129                 alg = DNS_KEYALG_RSASHA1;
 130
 131         keystruct.common.rdclass = dns_rdataclass_in;
 132         keystruct.common.rdtype = dns_rdatatype_dnskey;
 133         keystruct.flags = DNS_KEYOWNER_ZONE; /* fixed */
 134         if (is_sep)
 135                 keystruct.flags |= DNS_KEYFLAG_KSK;
 136         keystruct.protocol = DNS_KEYPROTO_DNSSEC; /* fixed */
 137         keystruct.algorithm = alg;
 138
 139         isc_buffer_init(&keydatabuf, keydata, sizeof(keydata));
 140         isc_buffer_init(&rrdatabuf, rrdata, sizeof(rrdata));
 141         result = isc_base64_decodestring(keystr, &keydatabuf);
 142         if (result != ISC_R_SUCCESS) {
 143                 fprintf(stderr, "base64 decode failed\n");
 144                 exit(1);
 145         }
 146         isc_buffer_usedregion(&keydatabuf, &r);
 147         keystruct.datalen = r.length;
 148         keystruct.data = r.base;
 149
 150         result = dns_rdata_fromstruct(NULL, keystruct.common.rdclass,
 151                                       keystruct.common.rdtype,
 152                                       &keystruct, &rrdatabuf);
 153         if (result != ISC_R_SUCCESS) {
 154                 fprintf(stderr, "failed to construct key rdata\n");
 155                 exit(1);
 156         }
 157         namelen = strlen(keynamestr);
 158         isc_buffer_init(&b, keynamestr, namelen);
 159         isc_buffer_add(&b, namelen);
 160         dns_fixedname_init(&fkeyname);
 161         keyname = dns_fixedname_name(&fkeyname);
 162         result = dns_name_fromtext(keyname, &b, dns_rootname, 0, NULL);
 163         if (result != ISC_R_SUCCESS) {
 164                 fprintf(stderr, "failed to construct key name\n");
 165                 exit(1);
 166         }
 167         result = dns_client_addtrustedkey(client, dns_rdataclass_in,
 168                                           keyname, &rrdatabuf);
 169         if (result != ISC_R_SUCCESS) {
 170                 fprintf(stderr, "failed to add key for %s\n",
 171                         keynamestr);
 172                 exit(1);
 173         }
 174 }
 175
 176 static void
 177 addserver(dns_client_t *client, const char *addrstr, const char *namespace) {
 178         struct addrinfo hints, *res;
 179         int gai_error;
 180         isc_sockaddr_t sa;
 181         isc_sockaddrlist_t servers;
 182         isc_result_t result;
 183         size_t namelen;
 184         isc_buffer_t b;
 185         dns_fixedname_t fname;
 186         dns_name_t *name = NULL;
 187
 188         memset(&hints, 0, sizeof(hints));
 189         hints.ai_family = AF_UNSPEC;
 190         hints.ai_socktype = SOCK_DGRAM;
 191         hints.ai_protocol = IPPROTO_UDP;
 192         hints.ai_flags = AI_NUMERICHOST;
 193         gai_error = getaddrinfo(addrstr, "53", &hints, &res);
 194         if (gai_error != 0) {
 195                 fprintf(stderr, "getaddrinfo failed: %s\n",
 196                         gai_strerror(gai_error));
 197                 exit(1);
 198         }
 199         INSIST(res->ai_addrlen <= sizeof(sa.type));
 200         memcpy(&sa.type, res->ai_addr, res->ai_addrlen);
 201         freeaddrinfo(res);
 202         sa.length = res->ai_addrlen;
 203         ISC_LINK_INIT(&sa, link);
 204         ISC_LIST_INIT(servers);
 205         ISC_LIST_APPEND(servers, &sa, link);
 206
 207         if (namespace != NULL) {
 208                 namelen = strlen(namespace);
 209                 isc_buffer_init(&b, namespace, namelen);
 210                 isc_buffer_add(&b, namelen);
 211                 dns_fixedname_init(&fname);
 212                 name = dns_fixedname_name(&fname);
 213                 result = dns_name_fromtext(name, &b, dns_rootname, 0, NULL);
 214                 if (result != ISC_R_SUCCESS) {
 215                         fprintf(stderr, "failed to convert qname: %d\n",
 216                                 result);
 217                         exit(1);
 218                 }
 219         }
 220
 221         result = dns_client_setservers(client, dns_rdataclass_in, name,
 222                                        &servers);
 223         if (result != ISC_R_SUCCESS) {
 224                 fprintf(stderr, "set server failed: %d\n", result);
 225                 exit(1);
 226         }
 227 }
 228
 229 int
 230 main(int argc, char *argv[]) {
 231         int ch;
 232         isc_textregion_t tr;
 233         char *altserver = NULL;
 234         char *altserveraddr = NULL;
 235         char *altservername = NULL;
 236         dns_client_t *client = NULL;
 237         char *keynamestr = NULL;
 238         char *keystr = NULL;
 239         isc_result_t result;
 240         isc_buffer_t b;
 241         dns_fixedname_t qname0;
 242         size_t namelen;
 243         dns_name_t *qname, *name;
 244         dns_rdatatype_t type = dns_rdatatype_a;
 245         dns_rdataset_t *rdataset;
 246         dns_namelist_t namelist;
 247         isc_mem_t *keymctx = NULL;
 248         unsigned int clientopt, resopt;
 249         isc_boolean_t is_sep = ISC_FALSE;
 250
 251         while ((ch = getopt(argc, argv, "a:es:t:k:K:")) != -1) {
 252                 switch (ch) {
 253                 case 't':
 254                         tr.base = optarg;
 255                         tr.length = strlen(optarg);
 256                         result = dns_rdatatype_fromtext(&type, &tr);
 257                         if (result != ISC_R_SUCCESS) {
 258                                 fprintf(stderr,
 259                                         "invalid RRtype: %s\n", optarg);
 260                                 exit(1);
 261                         }
 262                         break;
 263                 case 'a':
 264                         algname = optarg;
 265                         break;
 266                 case 'e':
 267                         is_sep = ISC_TRUE;
 268                         break;
 269                 case 's':
 270                         if (altserver != NULL) {
 271                                 fprintf(stderr, "alternate server "
 272                                         "already defined: %s\n",
 273                                         altserver);
 274                                 exit(1);
 275                         }
 276                         altserver = optarg;
 277                         break;
 278                 case 'k':
 279                         keynamestr = optarg;
 280                         break;
 281                 case 'K':
 282                         keystr = optarg;
 283                         break;
 284                 default:
 285                         usage();
 286                 }
 287         }
 288
 289         argc -= optind;
 290         argv += optind;
 291         if (argc < 2)
 292                 usage();
 293
 294         if (altserver != NULL) {
 295                 char *cp;
 296
 297                 cp = strchr(altserver, ':');
 298                 if (cp == NULL) {
 299                         fprintf(stderr, "invalid alternate server: %s\n",
 300                                 altserver);
 301                         exit(1);
 302                 }
 303                 *cp = '\0';
 304                 altservername = altserver;
 305                 altserveraddr = cp + 1;
 306         }
 307
 308         isc_lib_register();
 309         result = dns_lib_init();
 310         if (result != ISC_R_SUCCESS) {
 311                 fprintf(stderr, "dns_lib_init failed: %d\n", result);
 312                 exit(1);
 313         }
 314
 315         clientopt = 0;
 316         result = dns_client_create(&client, clientopt);
 317         if (result != ISC_R_SUCCESS) {
 318                 fprintf(stderr, "dns_client_create failed: %d\n", result);
 319                 exit(1);
 320         }
 321
 322         /* Set the nameserver */
 323         addserver(client, argv[0], NULL);
 324
 325         /* Set the alternate nameserver (when specified) */
 326         if (altserver != NULL)
 327                 addserver(client, altserveraddr, altservername);
 328
 329         /* Install DNSSEC key (if given) */
 330         if (keynamestr != NULL) {
 331                 if (keystr == NULL) {
 332                         fprintf(stderr,
 333                                 "key string is missing "
 334                                 "while key name is provided\n");
 335                         exit(1);
 336                 }
 337                 set_key(client, keynamestr, keystr, is_sep, &keymctx);
 338         }
 339
 340         /* Construct qname */
 341         namelen = strlen(argv[1]);
 342         isc_buffer_init(&b, argv[1], namelen);
 343         isc_buffer_add(&b, namelen);
 344         dns_fixedname_init(&qname0);
 345         qname = dns_fixedname_name(&qname0);
 346         result = dns_name_fromtext(qname, &b, dns_rootname, 0, NULL);
 347         if (result != ISC_R_SUCCESS)
 348                 fprintf(stderr, "failed to convert qname: %d\n", result);
 349
 350         /* Perform resolution */
 351         resopt = 0;
 352         if (keynamestr == NULL)
 353                 resopt |= DNS_CLIENTRESOPT_NODNSSEC;
 354         ISC_LIST_INIT(namelist);
 355         result = dns_client_resolve(client, qname, dns_rdataclass_in, type,
 356                                     resopt, &namelist);
 357         if (result != ISC_R_SUCCESS) {
 358                 fprintf(stderr,
 359                         "resolution failed: %s\n", dns_result_totext(result));
 360         }
 361         for (name = ISC_LIST_HEAD(namelist); name != NULL;
 362              name = ISC_LIST_NEXT(name, link)) {
 363                 for (rdataset = ISC_LIST_HEAD(name->list);
 364                      rdataset != NULL;
 365                      rdataset = ISC_LIST_NEXT(rdataset, link)) {
 366                         if (printdata(rdataset, name) != ISC_R_SUCCESS)
 367                                 fprintf(stderr, "print data failed\n");
 368                 }
 369         }
 370
 371         dns_client_freeresanswer(client, &namelist);
 372
 373         /* Cleanup */
 374         dns_client_destroy(&client);
 375         if (keynamestr != NULL)
 376                 isc_mem_destroy(&keymctx);
 377         dns_lib_shutdown();
 378
 379         exit(0);
 380 }