opal/mca/event/libevent2022/libevent/test/regress

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This source file includes following definitions.
dns_gethostbyname_cb
dns_gethostbyname
dns_gethostbyname6
dns_gethostbyaddr
dns_resolve_reverse
dns_server_request_cb
dns_server_gethostbyname_cb
dns_server
generic_dns_callback
dns_search_test
search_cancel_server_cb
dns_search_cancel_test
fail_server_cb
dns_retry_test
dns_reissue_test
dumb_bytes_fn
dns_inflight_test
be_getaddrinfo_server_cb
nil_accept_cb
be_connect_hostname_event_cb
test_bufferevent_connect_hostname
gai_cb
cancel_gai_cb
test_getaddrinfo_async
gaic_cancel_request_cb
gaic_server_cb
gaic_getaddrinfo_cb
gaic_launch
cnt_malloc
cnt_realloc
cnt_free
testleak_setup
testleak_cleanup
test_dbg_leak_cancel
test_dbg_leak_shutdown
test_getaddrinfo_async_cancel_stress
   1 /*
   2  * Copyright (c) 2003-2007 Niels Provos <provos@citi.umich.edu>
   3  * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
   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 #include <ws2tcpip.h>
  32 #endif
  33 
  34 #include "event2/event-config.h"
  35 
  36 #include <sys/types.h>
  37 #include <sys/stat.h>
  38 #ifdef _EVENT_HAVE_SYS_TIME_H
  39 #include <sys/time.h>
  40 #endif
  41 #include <sys/queue.h>
  42 #ifndef WIN32
  43 #include <sys/socket.h>
  44 #include <signal.h>
  45 #include <netinet/in.h>
  46 #include <arpa/inet.h>
  47 #include <unistd.h>
  48 #endif
  49 #ifdef _EVENT_HAVE_NETINET_IN6_H
  50 #include <netinet/in6.h>
  51 #endif
  52 #ifdef HAVE_NETDB_H
  53 #include <netdb.h>
  54 #endif
  55 #include <fcntl.h>
  56 #include <stdlib.h>
  57 #include <stdio.h>
  58 #include <string.h>
  59 #include <errno.h>
  60 
  61 #include "event2/dns.h"
  62 #include "event2/dns_compat.h"
  63 #include "event2/dns_struct.h"
  64 #include "event2/event.h"
  65 #include "event2/event_compat.h"
  66 #include "event2/event_struct.h"
  67 #include "event2/util.h"
  68 #include "event2/listener.h"
  69 #include "event2/bufferevent.h"
  70 #include "log-internal.h"
  71 #include "regress.h"
  72 #include "regress_testutils.h"
  73 
  74 #include "../util-internal.h"
  75 
  76 static int dns_ok = 0;
  77 static int dns_got_cancel = 0;
  78 static int dns_err = 0;
  79 
  80 
  81 static void
  82 dns_gethostbyname_cb(int result, char type, int count, int ttl,
  83     void *addresses, void *arg)
  84 {
  85         dns_ok = dns_err = 0;
  86 
  87         if (result == DNS_ERR_TIMEOUT) {
  88                 printf("[Timed out] ");
  89                 dns_err = result;
  90                 goto out;
  91         }
  92 
  93         if (result != DNS_ERR_NONE) {
  94                 printf("[Error code %d] ", result);
  95                 goto out;
  96         }
  97 
  98         TT_BLATHER(("type: %d, count: %d, ttl: %d: ", type, count, ttl));
  99 
 100         switch (type) {
 101         case DNS_IPv6_AAAA: {
 102 #if defined(_EVENT_HAVE_STRUCT_IN6_ADDR) && defined(_EVENT_HAVE_INET_NTOP) && defined(INET6_ADDRSTRLEN)
 103                 struct in6_addr *in6_addrs = addresses;
 104                 char buf[INET6_ADDRSTRLEN+1];
 105                 int i;
 106                 /* a resolution that's not valid does not help */
 107                 if (ttl < 0)
 108                         goto out;
 109                 for (i = 0; i < count; ++i) {
 110                         const char *b = evutil_inet_ntop(AF_INET6, &in6_addrs[i], buf,sizeof(buf));
 111                         if (b)
 112                                 TT_BLATHER(("%s ", b));
 113                         else
 114                                 TT_BLATHER(("%s ", strerror(errno)));
 115                 }
 116 #endif
 117                 break;
 118         }
 119         case DNS_IPv4_A: {
 120                 struct in_addr *in_addrs = addresses;
 121                 int i;
 122                 /* a resolution that's not valid does not help */
 123                 if (ttl < 0)
 124                         goto out;
 125                 for (i = 0; i < count; ++i)
 126                         TT_BLATHER(("%s ", inet_ntoa(in_addrs[i])));
 127                 break;
 128         }
 129         case DNS_PTR:
 130                 /* may get at most one PTR */
 131                 if (count != 1)
 132                         goto out;
 133 
 134                 TT_BLATHER(("%s ", *(char **)addresses));
 135                 break;
 136         default:
 137                 goto out;
 138         }
 139 
 140         dns_ok = type;
 141 
 142 out:
 143         if (arg == NULL)
 144                 event_loopexit(NULL);
 145         else
 146                 event_base_loopexit((struct event_base *)arg, NULL);
 147 }
 148 
 149 static void
 150 dns_gethostbyname(void)
 151 {
 152         dns_ok = 0;
 153         evdns_resolve_ipv4("www.monkey.org", 0, dns_gethostbyname_cb, NULL);
 154         event_dispatch();
 155 
 156         tt_int_op(dns_ok, ==, DNS_IPv4_A);
 157         test_ok = dns_ok;
 158 end:
 159         ;
 160 }
 161 
 162 static void
 163 dns_gethostbyname6(void)
 164 {
 165         dns_ok = 0;
 166         evdns_resolve_ipv6("www.ietf.org", 0, dns_gethostbyname_cb, NULL);
 167         event_dispatch();
 168 
 169         if (!dns_ok && dns_err == DNS_ERR_TIMEOUT) {
 170                 tt_skip();
 171         }
 172 
 173         tt_int_op(dns_ok, ==, DNS_IPv6_AAAA);
 174         test_ok = 1;
 175 end:
 176         ;
 177 }
 178 
 179 static void
 180 dns_gethostbyaddr(void)
 181 {
 182         struct in_addr in;
 183         in.s_addr = htonl(0x7f000001ul); /* 127.0.0.1 */
 184         dns_ok = 0;
 185         evdns_resolve_reverse(&in, 0, dns_gethostbyname_cb, NULL);
 186         event_dispatch();
 187 
 188         tt_int_op(dns_ok, ==, DNS_PTR);
 189         test_ok = dns_ok;
 190 end:
 191         ;
 192 }
 193 
 194 static void
 195 dns_resolve_reverse(void *ptr)
 196 {
 197         struct in_addr in;
 198         struct event_base *base = event_base_new();
 199         struct evdns_base *dns = evdns_base_new(base, 1/* init name servers */);
 200         struct evdns_request *req = NULL;
 201 
 202         tt_assert(base);
 203         tt_assert(dns);
 204         in.s_addr = htonl(0x7f000001ul); /* 127.0.0.1 */
 205         dns_ok = 0;
 206 
 207         req = evdns_base_resolve_reverse(
 208                 dns, &in, 0, dns_gethostbyname_cb, base);
 209         tt_assert(req);
 210 
 211         event_base_dispatch(base);
 212 
 213         tt_int_op(dns_ok, ==, DNS_PTR);
 214 
 215 end:
 216         if (dns)
 217                 evdns_base_free(dns, 0);
 218         if (base)
 219                 event_base_free(base);
 220 }
 221 
 222 static int n_server_responses = 0;
 223 
 224 static void
 225 dns_server_request_cb(struct evdns_server_request *req, void *data)
 226 {
 227         int i, r;
 228         const char TEST_ARPA[] = "11.11.168.192.in-addr.arpa";
 229         const char TEST_IN6[] =
 230             "f.e.f.e." "0.0.0.0." "0.0.0.0." "1.1.1.1."
 231             "a.a.a.a." "0.0.0.0." "0.0.0.0." "0.f.f.f.ip6.arpa";
 232 
 233         for (i = 0; i < req->nquestions; ++i) {
 234                 const int qtype = req->questions[i]->type;
 235                 const int qclass = req->questions[i]->dns_question_class;
 236                 const char *qname = req->questions[i]->name;
 237 
 238                 struct in_addr ans;
 239                 ans.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
 240                 if (qtype == EVDNS_TYPE_A &&
 241                     qclass == EVDNS_CLASS_INET &&
 242                     !evutil_ascii_strcasecmp(qname, "zz.example.com")) {
 243                         r = evdns_server_request_add_a_reply(req, qname,
 244                             1, &ans.s_addr, 12345);
 245                         if (r<0)
 246                                 dns_ok = 0;
 247                 } else if (qtype == EVDNS_TYPE_AAAA &&
 248                     qclass == EVDNS_CLASS_INET &&
 249                     !evutil_ascii_strcasecmp(qname, "zz.example.com")) {
 250                         char addr6[17] = "abcdefghijklmnop";
 251                         r = evdns_server_request_add_aaaa_reply(req,
 252                             qname, 1, addr6, 123);
 253                         if (r<0)
 254                                 dns_ok = 0;
 255                 } else if (qtype == EVDNS_TYPE_PTR &&
 256                     qclass == EVDNS_CLASS_INET &&
 257                     !evutil_ascii_strcasecmp(qname, TEST_ARPA)) {
 258                         r = evdns_server_request_add_ptr_reply(req, NULL,
 259                             qname, "ZZ.EXAMPLE.COM", 54321);
 260                         if (r<0)
 261                                 dns_ok = 0;
 262                 } else if (qtype == EVDNS_TYPE_PTR &&
 263                     qclass == EVDNS_CLASS_INET &&
 264                     !evutil_ascii_strcasecmp(qname, TEST_IN6)){
 265                         r = evdns_server_request_add_ptr_reply(req, NULL,
 266                             qname,
 267                             "ZZ-INET6.EXAMPLE.COM", 54322);
 268                         if (r<0)
 269                                 dns_ok = 0;
 270                 } else if (qtype == EVDNS_TYPE_A &&
 271                     qclass == EVDNS_CLASS_INET &&
 272                     !evutil_ascii_strcasecmp(qname, "drop.example.com")) {
 273                         if (evdns_server_request_drop(req)<0)
 274                                 dns_ok = 0;
 275                         return;
 276                 } else {
 277                         printf("Unexpected question %d %d \"%s\" ",
 278                             qtype, qclass, qname);
 279                         dns_ok = 0;
 280                 }
 281         }
 282         r = evdns_server_request_respond(req, 0);
 283         if (r<0) {
 284                 printf("Couldn't send reply. ");
 285                 dns_ok = 0;
 286         }
 287 }
 288 
 289 static void
 290 dns_server_gethostbyname_cb(int result, char type, int count, int ttl,
 291     void *addresses, void *arg)
 292 {
 293         if (result == DNS_ERR_CANCEL) {
 294                 if (arg != (void*)(char*)90909) {
 295                         printf("Unexpected cancelation");
 296                         dns_ok = 0;
 297                 }
 298                 dns_got_cancel = 1;
 299                 goto out;
 300         }
 301         if (result != DNS_ERR_NONE) {
 302                 printf("Unexpected result %d. ", result);
 303                 dns_ok = 0;
 304                 goto out;
 305         }
 306         if (count != 1) {
 307                 printf("Unexpected answer count %d. ", count);
 308                 dns_ok = 0;
 309                 goto out;
 310         }
 311         switch (type) {
 312         case DNS_IPv4_A: {
 313                 struct in_addr *in_addrs = addresses;
 314                 if (in_addrs[0].s_addr != htonl(0xc0a80b0bUL) || ttl != 12345) {
 315                         printf("Bad IPv4 response \"%s\" %d. ",
 316                                         inet_ntoa(in_addrs[0]), ttl);
 317                         dns_ok = 0;
 318                         goto out;
 319                 }
 320                 break;
 321         }
 322         case DNS_IPv6_AAAA: {
 323 #if defined (_EVENT_HAVE_STRUCT_IN6_ADDR) && defined(_EVENT_HAVE_INET_NTOP) && defined(INET6_ADDRSTRLEN)
 324                 struct in6_addr *in6_addrs = addresses;
 325                 char buf[INET6_ADDRSTRLEN+1];
 326                 if (memcmp(&in6_addrs[0].s6_addr, "abcdefghijklmnop", 16)
 327                     || ttl != 123) {
 328                         const char *b = evutil_inet_ntop(AF_INET6, &in6_addrs[0],buf,sizeof(buf));
 329                         printf("Bad IPv6 response \"%s\" %d. ", b, ttl);
 330                         dns_ok = 0;
 331                         goto out;
 332                 }
 333 #endif
 334                 break;
 335         }
 336         case DNS_PTR: {
 337                 char **addrs = addresses;
 338                 if (arg != (void*)6) {
 339                         if (strcmp(addrs[0], "ZZ.EXAMPLE.COM") ||
 340                             ttl != 54321) {
 341                                 printf("Bad PTR response \"%s\" %d. ",
 342                                     addrs[0], ttl);
 343                                 dns_ok = 0;
 344                                 goto out;
 345                         }
 346                 } else {
 347                         if (strcmp(addrs[0], "ZZ-INET6.EXAMPLE.COM") ||
 348                             ttl != 54322) {
 349                                 printf("Bad ipv6 PTR response \"%s\" %d. ",
 350                                     addrs[0], ttl);
 351                                 dns_ok = 0;
 352                                 goto out;
 353                         }
 354                 }
 355                 break;
 356         }
 357         default:
 358                 printf("Bad response type %d. ", type);
 359                 dns_ok = 0;
 360         }
 361  out:
 362         if (++n_server_responses == 3) {
 363                 event_loopexit(NULL);
 364         }
 365 }
 366 
 367 static void
 368 dns_server(void)
 369 {
 370         evutil_socket_t sock=-1;
 371         struct sockaddr_in my_addr;
 372         struct sockaddr_storage ss;
 373         ev_socklen_t slen;
 374         struct evdns_server_port *port=NULL;
 375         struct in_addr resolve_addr;
 376         struct in6_addr resolve_addr6;
 377         struct evdns_base *base=NULL;
 378         struct evdns_request *req=NULL;
 379 
 380         dns_ok = 1;
 381 
 382         base = evdns_base_new(NULL, 0);
 383 
 384         /* Now configure a nameserver port. */
 385         sock = socket(AF_INET, SOCK_DGRAM, 0);
 386         if (sock<0) {
 387                 tt_abort_perror("socket");
 388         }
 389 
 390         evutil_make_socket_nonblocking(sock);
 391 
 392         memset(&my_addr, 0, sizeof(my_addr));
 393         my_addr.sin_family = AF_INET;
 394         my_addr.sin_port = 0; /* kernel picks */
 395         my_addr.sin_addr.s_addr = htonl(0x7f000001UL);
 396         if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr)) < 0) {
 397                 tt_abort_perror("bind");
 398         }
 399         slen = sizeof(ss);
 400         if (getsockname(sock, (struct sockaddr*)&ss, &slen) < 0) {
 401                 tt_abort_perror("getsockname");
 402         }
 403 
 404         port = evdns_add_server_port(sock, 0, dns_server_request_cb, NULL);
 405 
 406         /* Add ourself as the only nameserver, and make sure we really are
 407          * the only nameserver. */
 408         evdns_base_nameserver_sockaddr_add(base, (struct sockaddr*)&ss, slen, 0);
 409         tt_int_op(evdns_base_count_nameservers(base), ==, 1);
 410 
 411         /* Send some queries. */
 412         evdns_base_resolve_ipv4(base, "zz.example.com", DNS_QUERY_NO_SEARCH,
 413                                            dns_server_gethostbyname_cb, NULL);
 414         evdns_base_resolve_ipv6(base, "zz.example.com", DNS_QUERY_NO_SEARCH,
 415                                            dns_server_gethostbyname_cb, NULL);
 416         resolve_addr.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
 417         evdns_base_resolve_reverse(base, &resolve_addr, 0,
 418             dns_server_gethostbyname_cb, NULL);
 419         memcpy(resolve_addr6.s6_addr,
 420             "\xff\xf0\x00\x00\x00\x00\xaa\xaa"
 421             "\x11\x11\x00\x00\x00\x00\xef\xef", 16);
 422         evdns_base_resolve_reverse_ipv6(base, &resolve_addr6, 0,
 423             dns_server_gethostbyname_cb, (void*)6);
 424 
 425         req = evdns_base_resolve_ipv4(base,
 426             "drop.example.com", DNS_QUERY_NO_SEARCH,
 427             dns_server_gethostbyname_cb, (void*)(char*)90909);
 428 
 429         evdns_cancel_request(base, req);
 430 
 431         event_dispatch();
 432 
 433         tt_assert(dns_got_cancel);
 434         test_ok = dns_ok;
 435 
 436 end:
 437         if (port)
 438                 evdns_close_server_port(port);
 439         if (sock >= 0)
 440                 evutil_closesocket(sock);
 441         if (base)
 442                 evdns_base_free(base, 0);
 443 }
 444 
 445 static int n_replies_left;
 446 static struct event_base *exit_base;
 447 
 448 struct generic_dns_callback_result {
 449         int result;
 450         char type;
 451         int count;
 452         int ttl;
 453         size_t addrs_len;
 454         void *addrs;
 455         char addrs_buf[256];
 456 };
 457 
 458 static void
 459 generic_dns_callback(int result, char type, int count, int ttl, void *addresses,
 460     void *arg)
 461 {
 462         size_t len;
 463         struct generic_dns_callback_result *res = arg;
 464         res->result = result;
 465         res->type = type;
 466         res->count = count;
 467         res->ttl = ttl;
 468 
 469         if (type == DNS_IPv4_A)
 470                 len = count * 4;
 471         else if (type == DNS_IPv6_AAAA)
 472                 len = count * 16;
 473         else if (type == DNS_PTR)
 474                 len = strlen(addresses)+1;
 475         else {
 476                 res->addrs_len = len = 0;
 477                 res->addrs = NULL;
 478         }
 479         if (len) {
 480                 res->addrs_len = len;
 481                 if (len > 256)
 482                         len = 256;
 483                 memcpy(res->addrs_buf, addresses, len);
 484                 res->addrs = res->addrs_buf;
 485         }
 486 
 487         if (--n_replies_left == 0)
 488                 event_base_loopexit(exit_base, NULL);
 489 }
 490 
 491 static struct regress_dns_server_table search_table[] = {
 492         { "host.a.example.com", "err", "3", 0 },
 493         { "host.b.example.com", "err", "3", 0 },
 494         { "host.c.example.com", "A", "11.22.33.44", 0 },
 495         { "host2.a.example.com", "err", "3", 0 },
 496         { "host2.b.example.com", "A", "200.100.0.100", 0 },
 497         { "host2.c.example.com", "err", "3", 0 },
 498         { "hostn.a.example.com", "errsoa", "0", 0 },
 499         { "hostn.b.example.com", "errsoa", "3", 0 },
 500         { "hostn.c.example.com", "err", "0", 0 },
 501 
 502         { "host", "err", "3", 0 },
 503         { "host2", "err", "3", 0 },
 504         { "*", "err", "3", 0 },
 505         { NULL, NULL, NULL, 0 }
 506 };
 507 
 508 static void
 509 dns_search_test(void *arg)
 510 {
 511         struct basic_test_data *data = arg;
 512         struct event_base *base = data->base;
 513         struct evdns_base *dns = NULL;
 514         ev_uint16_t portnum = 0;
 515         char buf[64];
 516 
 517         struct generic_dns_callback_result r[8];
 518 
 519         tt_assert(regress_dnsserver(base, &portnum, search_table));
 520         evutil_snprintf(buf, sizeof(buf), "127.0.0.1:%d", (int)portnum);
 521 
 522         dns = evdns_base_new(base, 0);
 523         tt_assert(!evdns_base_nameserver_ip_add(dns, buf));
 524 
 525         evdns_base_search_add(dns, "a.example.com");
 526         evdns_base_search_add(dns, "b.example.com");
 527         evdns_base_search_add(dns, "c.example.com");
 528 
 529         n_replies_left = sizeof(r)/sizeof(r[0]);
 530         exit_base = base;
 531 
 532         evdns_base_resolve_ipv4(dns, "host", 0, generic_dns_callback, &r[0]);
 533         evdns_base_resolve_ipv4(dns, "host2", 0, generic_dns_callback, &r[1]);
 534         evdns_base_resolve_ipv4(dns, "host", DNS_NO_SEARCH, generic_dns_callback, &r[2]);
 535         evdns_base_resolve_ipv4(dns, "host2", DNS_NO_SEARCH, generic_dns_callback, &r[3]);
 536         evdns_base_resolve_ipv4(dns, "host3", 0, generic_dns_callback, &r[4]);
 537         evdns_base_resolve_ipv4(dns, "hostn.a.example.com", DNS_NO_SEARCH, generic_dns_callback, &r[5]);
 538         evdns_base_resolve_ipv4(dns, "hostn.b.example.com", DNS_NO_SEARCH, generic_dns_callback, &r[6]);
 539         evdns_base_resolve_ipv4(dns, "hostn.c.example.com", DNS_NO_SEARCH, generic_dns_callback, &r[7]);
 540 
 541         event_base_dispatch(base);
 542 
 543         tt_int_op(r[0].type, ==, DNS_IPv4_A);
 544         tt_int_op(r[0].count, ==, 1);
 545         tt_int_op(((ev_uint32_t*)r[0].addrs)[0], ==, htonl(0x0b16212c));
 546         tt_int_op(r[1].type, ==, DNS_IPv4_A);
 547         tt_int_op(r[1].count, ==, 1);
 548         tt_int_op(((ev_uint32_t*)r[1].addrs)[0], ==, htonl(0xc8640064));
 549         tt_int_op(r[2].result, ==, DNS_ERR_NOTEXIST);
 550         tt_int_op(r[3].result, ==, DNS_ERR_NOTEXIST);
 551         tt_int_op(r[4].result, ==, DNS_ERR_NOTEXIST);
 552         tt_int_op(r[5].result, ==, DNS_ERR_NODATA);
 553         tt_int_op(r[5].ttl, ==, 42);
 554         tt_int_op(r[6].result, ==, DNS_ERR_NOTEXIST);
 555         tt_int_op(r[6].ttl, ==, 42);
 556         tt_int_op(r[7].result, ==, DNS_ERR_NODATA);
 557         tt_int_op(r[7].ttl, ==, 0);
 558 
 559 end:
 560         if (dns)
 561                 evdns_base_free(dns, 0);
 562 
 563         regress_clean_dnsserver();
 564 }
 565 
 566 static int request_count = 0;
 567 static struct evdns_request *current_req = NULL;
 568 
 569 static void
 570 search_cancel_server_cb(struct evdns_server_request *req, void *data)
 571 {
 572         const char *question;
 573 
 574         if (req->nquestions != 1)
 575                 TT_DIE(("Only handling one question at a time; got %d",
 576                         req->nquestions));
 577 
 578         question = req->questions[0]->name;
 579 
 580         TT_BLATHER(("got question, %s", question));
 581 
 582         tt_assert(request_count > 0);
 583         tt_assert(!evdns_server_request_respond(req, 3));
 584 
 585         if (!--request_count)
 586                 evdns_cancel_request(NULL, current_req);
 587 
 588 end:
 589         ;
 590 }
 591 
 592 static void
 593 dns_search_cancel_test(void *arg)
 594 {
 595         struct basic_test_data *data = arg;
 596         struct event_base *base = data->base;
 597         struct evdns_base *dns = NULL;
 598         struct evdns_server_port *port = NULL;
 599         ev_uint16_t portnum = 0;
 600         struct generic_dns_callback_result r1;
 601         char buf[64];
 602 
 603         port = regress_get_dnsserver(base, &portnum, NULL,
 604             search_cancel_server_cb, NULL);
 605         tt_assert(port);
 606         evutil_snprintf(buf, sizeof(buf), "127.0.0.1:%d", (int)portnum);
 607 
 608         dns = evdns_base_new(base, 0);
 609         tt_assert(!evdns_base_nameserver_ip_add(dns, buf));
 610 
 611         evdns_base_search_add(dns, "a.example.com");
 612         evdns_base_search_add(dns, "b.example.com");
 613         evdns_base_search_add(dns, "c.example.com");
 614         evdns_base_search_add(dns, "d.example.com");
 615 
 616         exit_base = base;
 617         request_count = 3;
 618         n_replies_left = 1;
 619 
 620         current_req = evdns_base_resolve_ipv4(dns, "host", 0,
 621                                         generic_dns_callback, &r1);
 622         event_base_dispatch(base);
 623 
 624         tt_int_op(r1.result, ==, DNS_ERR_CANCEL);
 625 
 626 end:
 627         if (port)
 628                 evdns_close_server_port(port);
 629         if (dns)
 630                 evdns_base_free(dns, 0);
 631 }
 632 
 633 static void
 634 fail_server_cb(struct evdns_server_request *req, void *data)
 635 {
 636         const char *question;
 637         int *count = data;
 638         struct in_addr in;
 639 
 640         /* Drop the first N requests that we get. */
 641         if (*count > 0) {
 642                 --*count;
 643                 tt_want(! evdns_server_request_drop(req));
 644                 return;
 645         }
 646 
 647         if (req->nquestions != 1)
 648                 TT_DIE(("Only handling one question at a time; got %d",
 649                         req->nquestions));
 650 
 651         question = req->questions[0]->name;
 652 
 653         if (!evutil_ascii_strcasecmp(question, "google.com")) {
 654                 /* Detect a probe, and get out of the loop. */
 655                 event_base_loopexit(exit_base, NULL);
 656         }
 657 
 658         evutil_inet_pton(AF_INET, "16.32.64.128", &in);
 659         evdns_server_request_add_a_reply(req, question, 1, &in.s_addr,
 660             100);
 661         tt_assert(! evdns_server_request_respond(req, 0))
 662         return;
 663 end:
 664         tt_want(! evdns_server_request_drop(req));
 665 }
 666 
 667 static void
 668 dns_retry_test(void *arg)
 669 {
 670         struct basic_test_data *data = arg;
 671         struct event_base *base = data->base;
 672         struct evdns_server_port *port = NULL;
 673         struct evdns_base *dns = NULL;
 674         int drop_count = 2;
 675         ev_uint16_t portnum = 0;
 676         char buf[64];
 677 
 678         struct generic_dns_callback_result r1;
 679 
 680         port = regress_get_dnsserver(base, &portnum, NULL,
 681             fail_server_cb, &drop_count);
 682         tt_assert(port);
 683         evutil_snprintf(buf, sizeof(buf), "127.0.0.1:%d", (int)portnum);
 684 
 685         dns = evdns_base_new(base, 0);
 686         tt_assert(!evdns_base_nameserver_ip_add(dns, buf));
 687         tt_assert(! evdns_base_set_option(dns, "timeout", "0.3"));
 688         tt_assert(! evdns_base_set_option(dns, "max-timeouts:", "10"));
 689         tt_assert(! evdns_base_set_option(dns, "initial-probe-timeout", "0.5"));
 690 
 691         evdns_base_resolve_ipv4(dns, "host.example.com", 0,
 692             generic_dns_callback, &r1);
 693 
 694         n_replies_left = 1;
 695         exit_base = base;
 696 
 697         event_base_dispatch(base);
 698 
 699         tt_int_op(drop_count, ==, 0);
 700 
 701         tt_int_op(r1.type, ==, DNS_IPv4_A);
 702         tt_int_op(r1.count, ==, 1);
 703         tt_int_op(((ev_uint32_t*)r1.addrs)[0], ==, htonl(0x10204080));
 704 
 705         /* Now try again, but this time have the server get treated as
 706          * failed, so we can send it a test probe. */
 707         drop_count = 4;
 708         tt_assert(! evdns_base_set_option(dns, "max-timeouts:", "3"));
 709         tt_assert(! evdns_base_set_option(dns, "attempts:", "4"));
 710         memset(&r1, 0, sizeof(r1));
 711 
 712         evdns_base_resolve_ipv4(dns, "host.example.com", 0,
 713             generic_dns_callback, &r1);
 714 
 715         n_replies_left = 2;
 716 
 717         /* This will run until it answers the "google.com" probe request. */
 718         event_base_dispatch(base);
 719 
 720         /* We'll treat the server as failed here. */
 721         tt_int_op(r1.result, ==, DNS_ERR_TIMEOUT);
 722 
 723         /* It should work this time. */
 724         tt_int_op(drop_count, ==, 0);
 725         evdns_base_resolve_ipv4(dns, "host.example.com", 0,
 726             generic_dns_callback, &r1);
 727 
 728         event_base_dispatch(base);
 729         tt_int_op(r1.result, ==, DNS_ERR_NONE);
 730         tt_int_op(r1.type, ==, DNS_IPv4_A);
 731         tt_int_op(r1.count, ==, 1);
 732         tt_int_op(((ev_uint32_t*)r1.addrs)[0], ==, htonl(0x10204080));
 733 
 734 end:
 735         if (dns)
 736                 evdns_base_free(dns, 0);
 737         if (port)
 738                 evdns_close_server_port(port);
 739 }
 740 
 741 static struct regress_dns_server_table internal_error_table[] = {
 742         /* Error 4 (NOTIMPL) makes us reissue the request to another server
 743            if we can.
 744 
 745            XXXX we should reissue under a much wider set of circumstances!
 746          */
 747         { "foof.example.com", "err", "4", 0 },
 748         { NULL, NULL, NULL, 0 }
 749 };
 750 
 751 static struct regress_dns_server_table reissue_table[] = {
 752         { "foof.example.com", "A", "240.15.240.15", 0 },
 753         { NULL, NULL, NULL, 0 }
 754 };
 755 
 756 static void
 757 dns_reissue_test(void *arg)
 758 {
 759         struct basic_test_data *data = arg;
 760         struct event_base *base = data->base;
 761         struct evdns_server_port *port1 = NULL, *port2 = NULL;
 762         struct evdns_base *dns = NULL;
 763         struct generic_dns_callback_result r1;
 764         ev_uint16_t portnum1 = 0, portnum2=0;
 765         char buf1[64], buf2[64];
 766 
 767         port1 = regress_get_dnsserver(base, &portnum1, NULL,
 768             regress_dns_server_cb, internal_error_table);
 769         tt_assert(port1);
 770         port2 = regress_get_dnsserver(base, &portnum2, NULL,
 771             regress_dns_server_cb, reissue_table);
 772         tt_assert(port2);
 773         evutil_snprintf(buf1, sizeof(buf1), "127.0.0.1:%d", (int)portnum1);
 774         evutil_snprintf(buf2, sizeof(buf2), "127.0.0.1:%d", (int)portnum2);
 775 
 776         dns = evdns_base_new(base, 0);
 777         tt_assert(!evdns_base_nameserver_ip_add(dns, buf1));
 778         tt_assert(! evdns_base_set_option(dns, "timeout:", "0.3"));
 779         tt_assert(! evdns_base_set_option(dns, "max-timeouts:", "2"));
 780         tt_assert(! evdns_base_set_option(dns, "attempts:", "5"));
 781 
 782         memset(&r1, 0, sizeof(r1));
 783         evdns_base_resolve_ipv4(dns, "foof.example.com", 0,
 784             generic_dns_callback, &r1);
 785 
 786         /* Add this after, so that we are sure to get a reissue. */
 787         tt_assert(!evdns_base_nameserver_ip_add(dns, buf2));
 788 
 789         n_replies_left = 1;
 790         exit_base = base;
 791 
 792         event_base_dispatch(base);
 793         tt_int_op(r1.result, ==, DNS_ERR_NONE);
 794         tt_int_op(r1.type, ==, DNS_IPv4_A);
 795         tt_int_op(r1.count, ==, 1);
 796         tt_int_op(((ev_uint32_t*)r1.addrs)[0], ==, htonl(0xf00ff00f));
 797 
 798         /* Make sure we dropped at least once. */
 799         tt_int_op(internal_error_table[0].seen, >, 0);
 800 
 801 end:
 802         if (dns)
 803                 evdns_base_free(dns, 0);
 804         if (port1)
 805                 evdns_close_server_port(port1);
 806         if (port2)
 807                 evdns_close_server_port(port2);
 808 }
 809 
 810 #if 0
 811 static void
 812 dumb_bytes_fn(char *p, size_t n)
 813 {
 814         unsigned i;
 815         /* This gets us 6 bits of entropy per transaction ID, which means we
 816          * will have probably have collisions and need to pick again. */
 817         for (i=0;i<n;++i)
 818                 p[i] = (char)(rand() & 7);
 819 }
 820 #endif
 821 
 822 static void
 823 dns_inflight_test(void *arg)
 824 {
 825         struct basic_test_data *data = arg;
 826         struct event_base *base = data->base;
 827         struct evdns_base *dns = NULL;
 828         ev_uint16_t portnum = 0;
 829         char buf[64];
 830 
 831         struct generic_dns_callback_result r[20];
 832         int i;
 833 
 834         tt_assert(regress_dnsserver(base, &portnum, reissue_table));
 835         evutil_snprintf(buf, sizeof(buf), "127.0.0.1:%d", (int)portnum);
 836 
 837         dns = evdns_base_new(base, 0);
 838         tt_assert(!evdns_base_nameserver_ip_add(dns, buf));
 839         tt_assert(! evdns_base_set_option(dns, "max-inflight:", "3"));
 840         tt_assert(! evdns_base_set_option(dns, "randomize-case:", "0"));
 841 
 842         for (i=0;i<20;++i)
 843                 evdns_base_resolve_ipv4(dns, "foof.example.com", 0, generic_dns_callback, &r[i]);
 844 
 845         n_replies_left = 20;
 846         exit_base = base;
 847 
 848         event_base_dispatch(base);
 849 
 850         for (i=0;i<20;++i) {
 851                 tt_int_op(r[i].type, ==, DNS_IPv4_A);
 852                 tt_int_op(r[i].count, ==, 1);
 853                 tt_int_op(((ev_uint32_t*)r[i].addrs)[0], ==, htonl(0xf00ff00f));
 854         }
 855 
 856 end:
 857         if (dns)
 858                 evdns_base_free(dns, 0);
 859         regress_clean_dnsserver();
 860 }
 861 
 862 /* === Test for bufferevent_socket_connect_hostname */
 863 
 864 static int total_connected_or_failed = 0;
 865 static int total_n_accepted = 0;
 866 static struct event_base *be_connect_hostname_base = NULL;
 867 
 868 /* Implements a DNS server for the connect_hostname test and the
 869  * getaddrinfo_async test */
 870 static void
 871 be_getaddrinfo_server_cb(struct evdns_server_request *req, void *data)
 872 {
 873         int i;
 874         int *n_got_p=data;
 875         int added_any=0;
 876         ++*n_got_p;
 877 
 878         for (i=0;i<req->nquestions;++i) {
 879                 const int qtype = req->questions[i]->type;
 880                 const int qclass = req->questions[i]->dns_question_class;
 881                 const char *qname = req->questions[i]->name;
 882                 struct in_addr ans;
 883                 struct in6_addr ans6;
 884                 memset(&ans6, 0, sizeof(ans6));
 885 
 886                 if (qtype == EVDNS_TYPE_A &&
 887                     qclass == EVDNS_CLASS_INET &&
 888                     !evutil_ascii_strcasecmp(qname, "nobodaddy.example.com")) {
 889                         ans.s_addr = htonl(0x7f000001);
 890                         evdns_server_request_add_a_reply(req, qname,
 891                             1, &ans.s_addr, 2000);
 892                         added_any = 1;
 893                 } else if (!evutil_ascii_strcasecmp(qname,
 894                         "nosuchplace.example.com")) {
 895                         /* ok, just say notfound. */
 896                 } else if (!evutil_ascii_strcasecmp(qname,
 897                         "both.example.com")) {
 898                         if (qtype == EVDNS_TYPE_A) {
 899                                 ans.s_addr = htonl(0x50502020);
 900                                 evdns_server_request_add_a_reply(req, qname,
 901                                     1, &ans.s_addr, 2000);
 902                                 added_any = 1;
 903                         } else if (qtype == EVDNS_TYPE_AAAA) {
 904                                 ans6.s6_addr[0] = 0x80;
 905                                 ans6.s6_addr[1] = 0xff;
 906                                 ans6.s6_addr[14] = 0xbb;
 907                                 ans6.s6_addr[15] = 0xbb;
 908                                 evdns_server_request_add_aaaa_reply(req, qname,
 909                                     1, &ans6.s6_addr, 2000);
 910                                 added_any = 1;
 911                         }
 912                         evdns_server_request_add_cname_reply(req, qname,
 913                             "both-canonical.example.com", 1000);
 914                 } else if (!evutil_ascii_strcasecmp(qname,
 915                         "v4only.example.com") ||
 916                     !evutil_ascii_strcasecmp(qname, "v4assert.example.com")) {
 917                         if (qtype == EVDNS_TYPE_A) {
 918                                 ans.s_addr = htonl(0x12345678);
 919                                 evdns_server_request_add_a_reply(req, qname,
 920                                     1, &ans.s_addr, 2000);
 921                                 added_any = 1;
 922                         } else if (!evutil_ascii_strcasecmp(qname,
 923                                 "v4assert.example.com")) {
 924                                 TT_FAIL(("Got an AAAA request for v4assert"));
 925                         }
 926                 } else if (!evutil_ascii_strcasecmp(qname,
 927                         "v6only.example.com") ||
 928                     !evutil_ascii_strcasecmp(qname, "v6assert.example.com")) {
 929                         if (qtype == EVDNS_TYPE_AAAA) {
 930                                 ans6.s6_addr[0] = 0x0b;
 931                                 ans6.s6_addr[1] = 0x0b;
 932                                 ans6.s6_addr[14] = 0xf0;
 933                                 ans6.s6_addr[15] = 0x0d;
 934                                 evdns_server_request_add_aaaa_reply(req, qname,
 935                                     1, &ans6.s6_addr, 2000);
 936                                 added_any = 1;
 937                         }  else if (!evutil_ascii_strcasecmp(qname,
 938                                 "v6assert.example.com")) {
 939                                 TT_FAIL(("Got a A request for v6assert"));
 940                         }
 941                 } else if (!evutil_ascii_strcasecmp(qname,
 942                         "v6timeout.example.com")) {
 943                         if (qtype == EVDNS_TYPE_A) {
 944                                 ans.s_addr = htonl(0xabcdef01);
 945                                 evdns_server_request_add_a_reply(req, qname,
 946                                     1, &ans.s_addr, 2000);
 947                                 added_any = 1;
 948                         } else if (qtype == EVDNS_TYPE_AAAA) {
 949                                 /* Let the v6 request time out.*/
 950                                 evdns_server_request_drop(req);
 951                                 return;
 952                         }
 953                 } else if (!evutil_ascii_strcasecmp(qname,
 954                         "v4timeout.example.com")) {
 955                         if (qtype == EVDNS_TYPE_AAAA) {
 956                                 ans6.s6_addr[0] = 0x0a;
 957                                 ans6.s6_addr[1] = 0x0a;
 958                                 ans6.s6_addr[14] = 0xff;
 959                                 ans6.s6_addr[15] = 0x01;
 960                                 evdns_server_request_add_aaaa_reply(req, qname,
 961                                     1, &ans6.s6_addr, 2000);
 962                                 added_any = 1;
 963                         } else if (qtype == EVDNS_TYPE_A) {
 964                                 /* Let the v4 request time out.*/
 965                                 evdns_server_request_drop(req);
 966                                 return;
 967                         }
 968                 } else if (!evutil_ascii_strcasecmp(qname,
 969                         "v6timeout-nonexist.example.com")) {
 970                         if (qtype == EVDNS_TYPE_A) {
 971                                 /* Fall through, give an nexist. */
 972                         } else if (qtype == EVDNS_TYPE_AAAA) {
 973                                 /* Let the v6 request time out.*/
 974                                 evdns_server_request_drop(req);
 975                                 return;
 976                         }
 977                 } else if (!evutil_ascii_strcasecmp(qname,
 978                         "all-timeout.example.com")) {
 979                         /* drop all requests */
 980                         evdns_server_request_drop(req);
 981                         return;
 982                 } else {
 983                         TT_GRIPE(("Got weird request for %s",qname));
 984                 }
 985         }
 986         if (added_any)
 987                 evdns_server_request_respond(req, 0);
 988         else
 989                 evdns_server_request_respond(req, 3);
 990 }
 991 
 992 /* Implements a listener for connect_hostname test. */
 993 static void
 994 nil_accept_cb(struct evconnlistener *l, evutil_socket_t fd, struct sockaddr *s,
 995     int socklen, void *arg)
 996 {
 997         int *p = arg;
 998         (*p)++;
 999         ++total_n_accepted;
1000         /* don't do anything with the socket; let it close when we exit() */
1001         if (total_n_accepted >= 3 && total_connected_or_failed >= 5)
1002                 event_base_loopexit(be_connect_hostname_base,
1003                     NULL);
1004 }
1005 
1006 struct be_conn_hostname_result {
1007         int dnserr;
1008         int what;
1009 };
1010 
1011 /* Bufferevent event callback for the connect_hostname test: remembers what
1012  * event we got. */
1013 static void
1014 be_connect_hostname_event_cb(struct bufferevent *bev, short what, void *ctx)
1015 {
1016         struct be_conn_hostname_result *got = ctx;
1017         if (!got->what) {
1018                 TT_BLATHER(("Got a bufferevent event %d", what));
1019                 got->what = what;
1020 
1021                 if ((what & BEV_EVENT_CONNECTED) || (what & BEV_EVENT_ERROR)) {
1022                         int r;
1023                         if ((r = bufferevent_socket_get_dns_error(bev))) {
1024                                 got->dnserr = r;
1025                                 TT_BLATHER(("DNS error %d: %s", r,
1026                                            evutil_gai_strerror(r)));
1027                         }                       ++total_connected_or_failed;
1028                         TT_BLATHER(("Got %d connections or errors.", total_connected_or_failed));
1029 
1030                         if (total_n_accepted >= 3 && total_connected_or_failed >= 5)
1031                                 event_base_loopexit(be_connect_hostname_base,
1032                                     NULL);
1033                 }
1034         } else {
1035                 TT_FAIL(("Two events on one bufferevent. %d,%d",
1036                         got->what, (int)what));
1037         }
1038 }
1039 
1040 static void
1041 test_bufferevent_connect_hostname(void *arg)
1042 {
1043         struct basic_test_data *data = arg;
1044         struct evconnlistener *listener = NULL;
1045         struct bufferevent *be1=NULL, *be2=NULL, *be3=NULL, *be4=NULL, *be5=NULL;
1046         struct be_conn_hostname_result be1_outcome={0,0}, be2_outcome={0,0},
1047                be3_outcome={0,0}, be4_outcome={0,0}, be5_outcome={0,0};
1048         int expect_err5;
1049         struct evdns_base *dns=NULL;
1050         struct evdns_server_port *port=NULL;
1051         struct sockaddr_in sin;
1052         int listener_port=-1;
1053         ev_uint16_t dns_port=0;
1054         int n_accept=0, n_dns=0;
1055         char buf[128];
1056 
1057         be_connect_hostname_base = data->base;
1058 
1059         /* Bind an address and figure out what port it's on. */
1060         memset(&sin, 0, sizeof(sin));
1061         sin.sin_family = AF_INET;
1062         sin.sin_addr.s_addr = htonl(0x7f000001); /* 127.0.0.1 */
1063         sin.sin_port = 0;
1064         listener = evconnlistener_new_bind(data->base, nil_accept_cb,
1065             &n_accept,
1066             LEV_OPT_REUSEABLE|LEV_OPT_CLOSE_ON_EXEC,
1067             -1, (struct sockaddr *)&sin, sizeof(sin));
1068         tt_assert(listener);
1069         listener_port = regress_get_socket_port(
1070                 evconnlistener_get_fd(listener));
1071 
1072         port = regress_get_dnsserver(data->base, &dns_port, NULL,
1073             be_getaddrinfo_server_cb, &n_dns);
1074         tt_assert(port);
1075         tt_int_op(dns_port, >=, 0);
1076 
1077         /* Start an evdns_base that uses the server as its resolver. */
1078         dns = evdns_base_new(data->base, 0);
1079         evutil_snprintf(buf, sizeof(buf), "127.0.0.1:%d", (int)dns_port);
1080         evdns_base_nameserver_ip_add(dns, buf);
1081 
1082         /* Now, finally, at long last, launch the bufferevents.  One should do
1083          * a failing lookup IP, one should do a successful lookup by IP,
1084          * and one should do a successful lookup by hostname. */
1085         be1 = bufferevent_socket_new(data->base, -1, BEV_OPT_CLOSE_ON_FREE);
1086         be2 = bufferevent_socket_new(data->base, -1, BEV_OPT_CLOSE_ON_FREE);
1087         be3 = bufferevent_socket_new(data->base, -1, BEV_OPT_CLOSE_ON_FREE);
1088         be4 = bufferevent_socket_new(data->base, -1, BEV_OPT_CLOSE_ON_FREE);
1089         be5 = bufferevent_socket_new(data->base, -1, BEV_OPT_CLOSE_ON_FREE);
1090 
1091         bufferevent_setcb(be1, NULL, NULL, be_connect_hostname_event_cb,
1092             &be1_outcome);
1093         bufferevent_setcb(be2, NULL, NULL, be_connect_hostname_event_cb,
1094             &be2_outcome);
1095         bufferevent_setcb(be3, NULL, NULL, be_connect_hostname_event_cb,
1096             &be3_outcome);
1097         bufferevent_setcb(be4, NULL, NULL, be_connect_hostname_event_cb,
1098             &be4_outcome);
1099         bufferevent_setcb(be5, NULL, NULL, be_connect_hostname_event_cb,
1100             &be5_outcome);
1101 
1102         /* Launch an async resolve that will fail. */
1103         tt_assert(!bufferevent_socket_connect_hostname(be1, dns, AF_INET,
1104                 "nosuchplace.example.com", listener_port));
1105         /* Connect to the IP without resolving. */
1106         tt_assert(!bufferevent_socket_connect_hostname(be2, dns, AF_INET,
1107                 "127.0.0.1", listener_port));
1108         /* Launch an async resolve that will succeed. */
1109         tt_assert(!bufferevent_socket_connect_hostname(be3, dns, AF_INET,
1110                 "nobodaddy.example.com", listener_port));
1111         /* Use the blocking resolver.  This one will fail if your resolver
1112          * can't resolve localhost to 127.0.0.1 */
1113         tt_assert(!bufferevent_socket_connect_hostname(be4, NULL, AF_INET,
1114                 "localhost", listener_port));
1115         /* Use the blocking resolver with a nonexistent hostname. */
1116         tt_assert(!bufferevent_socket_connect_hostname(be5, NULL, AF_INET,
1117                 "nonesuch.nowhere.example.com", 80));
1118         {
1119                 /* The blocking resolver will use the system nameserver, which
1120                  * might tell us anything.  (Yes, some twits even pretend that
1121                  * example.com is real.) Let's see what answer to expect. */
1122                 struct evutil_addrinfo hints, *ai = NULL;
1123                 memset(&hints, 0, sizeof(hints));
1124                 hints.ai_family = AF_INET;
1125                 hints.ai_socktype = SOCK_STREAM;
1126                 hints.ai_protocol = IPPROTO_TCP;
1127                 expect_err5 = evutil_getaddrinfo(
1128                         "nonesuch.nowhere.example.com", "80", &hints, &ai);
1129         }
1130 
1131         event_base_dispatch(data->base);
1132 
1133         tt_int_op(be1_outcome.what, ==, BEV_EVENT_ERROR);
1134         tt_int_op(be1_outcome.dnserr, ==, EVUTIL_EAI_NONAME);
1135         tt_int_op(be2_outcome.what, ==, BEV_EVENT_CONNECTED);
1136         tt_int_op(be2_outcome.dnserr, ==, 0);
1137         tt_int_op(be3_outcome.what, ==, BEV_EVENT_CONNECTED);
1138         tt_int_op(be3_outcome.dnserr, ==, 0);
1139         tt_int_op(be4_outcome.what, ==, BEV_EVENT_CONNECTED);
1140         tt_int_op(be4_outcome.dnserr, ==, 0);
1141         if (expect_err5) {
1142                 tt_int_op(be5_outcome.what, ==, BEV_EVENT_ERROR);
1143                 tt_int_op(be5_outcome.dnserr, ==, expect_err5);
1144         }
1145 
1146         tt_int_op(n_accept, ==, 3);
1147         tt_int_op(n_dns, ==, 2);
1148 
1149 end:
1150         if (listener)
1151                 evconnlistener_free(listener);
1152         if (port)
1153                 evdns_close_server_port(port);
1154         if (dns)
1155                 evdns_base_free(dns, 0);
1156         if (be1)
1157                 bufferevent_free(be1);
1158         if (be2)
1159                 bufferevent_free(be2);
1160         if (be3)
1161                 bufferevent_free(be3);
1162         if (be4)
1163                 bufferevent_free(be4);
1164         if (be5)
1165                 bufferevent_free(be5);
1166 }
1167 
1168 
1169 struct gai_outcome {
1170         int err;
1171         struct evutil_addrinfo *ai;
1172 };
1173 
1174 static int n_gai_results_pending = 0;
1175 static struct event_base *exit_base_on_no_pending_results = NULL;
1176 
1177 static void
1178 gai_cb(int err, struct evutil_addrinfo *res, void *ptr)
1179 {
1180         struct gai_outcome *go = ptr;
1181         go->err = err;
1182         go->ai = res;
1183         if (--n_gai_results_pending <= 0 && exit_base_on_no_pending_results)
1184                 event_base_loopexit(exit_base_on_no_pending_results, NULL);
1185         if (n_gai_results_pending < 900)
1186                 TT_BLATHER(("Got an answer; expecting %d more.",
1187                         n_gai_results_pending));
1188 }
1189 
1190 static void
1191 cancel_gai_cb(evutil_socket_t fd, short what, void *ptr)
1192 {
1193         struct evdns_getaddrinfo_request *r = ptr;
1194         evdns_getaddrinfo_cancel(r);
1195 }
1196 
1197 static void
1198 test_getaddrinfo_async(void *arg)
1199 {
1200         struct basic_test_data *data = arg;
1201         struct evutil_addrinfo hints, *a;
1202         struct gai_outcome local_outcome;
1203         struct gai_outcome a_out[12];
1204         int i;
1205         struct evdns_getaddrinfo_request *r;
1206         char buf[128];
1207         struct evdns_server_port *port = NULL;
1208         ev_uint16_t dns_port = 0;
1209         int n_dns_questions = 0;
1210 
1211         struct evdns_base *dns_base = evdns_base_new(data->base, 0);
1212         tt_assert(dns_base);
1213 
1214         /* for localhost */
1215         evdns_base_load_hosts(dns_base, NULL);
1216 
1217         memset(a_out, 0, sizeof(a_out));
1218         memset(&local_outcome, 0, sizeof(local_outcome));
1219 
1220         n_gai_results_pending = 10000; /* don't think about exiting yet. */
1221 
1222         /* 1. Try some cases that will never hit the asynchronous resolver. */
1223         /* 1a. Simple case with a symbolic service name */
1224         memset(&hints, 0, sizeof(hints));
1225         hints.ai_family = PF_UNSPEC;
1226         hints.ai_socktype = SOCK_STREAM;
1227         memset(&local_outcome, 0, sizeof(local_outcome));
1228         r = evdns_getaddrinfo(dns_base, "1.2.3.4", "http",
1229             &hints, gai_cb, &local_outcome);
1230         tt_assert(! r);
1231         if (!local_outcome.err) {
1232                 tt_ptr_op(local_outcome.ai,!=,NULL);
1233                 test_ai_eq(local_outcome.ai, "1.2.3.4:80", SOCK_STREAM, IPPROTO_TCP);
1234                 evutil_freeaddrinfo(local_outcome.ai);
1235                 local_outcome.ai = NULL;
1236         } else {
1237                 TT_BLATHER(("Apparently we have no getservbyname."));
1238         }
1239 
1240         /* 1b. EVUTIL_AI_NUMERICHOST is set */
1241         memset(&hints, 0, sizeof(hints));
1242         hints.ai_family = PF_UNSPEC;
1243         hints.ai_flags = EVUTIL_AI_NUMERICHOST;
1244         memset(&local_outcome, 0, sizeof(local_outcome));
1245         r = evdns_getaddrinfo(dns_base, "www.google.com", "80",
1246             &hints, gai_cb, &local_outcome);
1247         tt_ptr_op(r,==,NULL);
1248         tt_int_op(local_outcome.err,==,EVUTIL_EAI_NONAME);
1249         tt_ptr_op(local_outcome.ai,==,NULL);
1250 
1251         /* 1c. We give a numeric address (ipv6) */
1252         memset(&hints, 0, sizeof(hints));
1253         memset(&local_outcome, 0, sizeof(local_outcome));
1254         hints.ai_family = PF_UNSPEC;
1255         hints.ai_protocol = IPPROTO_TCP;
1256         r = evdns_getaddrinfo(dns_base, "f::f", "8008",
1257             &hints, gai_cb, &local_outcome);
1258         tt_assert(!r);
1259         tt_int_op(local_outcome.err,==,0);
1260         tt_assert(local_outcome.ai);
1261         tt_ptr_op(local_outcome.ai->ai_next,==,NULL);
1262         test_ai_eq(local_outcome.ai, "[f::f]:8008", SOCK_STREAM, IPPROTO_TCP);
1263         evutil_freeaddrinfo(local_outcome.ai);
1264         local_outcome.ai = NULL;
1265 
1266         /* 1d. We give a numeric address (ipv4) */
1267         memset(&hints, 0, sizeof(hints));
1268         memset(&local_outcome, 0, sizeof(local_outcome));
1269         hints.ai_family = PF_UNSPEC;
1270         r = evdns_getaddrinfo(dns_base, "5.6.7.8", NULL,
1271             &hints, gai_cb, &local_outcome);
1272         tt_assert(!r);
1273         tt_int_op(local_outcome.err,==,0);
1274         tt_assert(local_outcome.ai);
1275         a = ai_find_by_protocol(local_outcome.ai, IPPROTO_TCP);
1276         tt_assert(a);
1277         test_ai_eq(a, "5.6.7.8", SOCK_STREAM, IPPROTO_TCP);
1278         a = ai_find_by_protocol(local_outcome.ai, IPPROTO_UDP);
1279         tt_assert(a);
1280         test_ai_eq(a, "5.6.7.8", SOCK_DGRAM, IPPROTO_UDP);
1281         evutil_freeaddrinfo(local_outcome.ai);
1282         local_outcome.ai = NULL;
1283 
1284         /* 1e. nodename is NULL (bind) */
1285         memset(&hints, 0, sizeof(hints));
1286         memset(&local_outcome, 0, sizeof(local_outcome));
1287         hints.ai_family = PF_UNSPEC;
1288         hints.ai_socktype = SOCK_DGRAM;
1289         hints.ai_flags = EVUTIL_AI_PASSIVE;
1290         r = evdns_getaddrinfo(dns_base, NULL, "9090",
1291             &hints, gai_cb, &local_outcome);
1292         tt_assert(!r);
1293         tt_int_op(local_outcome.err,==,0);
1294         tt_assert(local_outcome.ai);
1295         /* we should get a v4 address of 0.0.0.0... */
1296         a = ai_find_by_family(local_outcome.ai, PF_INET);
1297         tt_assert(a);
1298         test_ai_eq(a, "0.0.0.0:9090", SOCK_DGRAM, IPPROTO_UDP);
1299         /* ... and a v6 address of ::0 */
1300         a = ai_find_by_family(local_outcome.ai, PF_INET6);
1301         tt_assert(a);
1302         test_ai_eq(a, "[::]:9090", SOCK_DGRAM, IPPROTO_UDP);
1303         evutil_freeaddrinfo(local_outcome.ai);
1304         local_outcome.ai = NULL;
1305 
1306         /* 1f. nodename is NULL (connect) */
1307         memset(&hints, 0, sizeof(hints));
1308         memset(&local_outcome, 0, sizeof(local_outcome));
1309         hints.ai_family = PF_UNSPEC;
1310         hints.ai_socktype = SOCK_STREAM;
1311         r = evdns_getaddrinfo(dns_base, NULL, "2",
1312             &hints, gai_cb, &local_outcome);
1313         tt_assert(!r);
1314         tt_int_op(local_outcome.err,==,0);
1315         tt_assert(local_outcome.ai);
1316         /* we should get a v4 address of 127.0.0.1 .... */
1317         a = ai_find_by_family(local_outcome.ai, PF_INET);
1318         tt_assert(a);
1319         test_ai_eq(a, "127.0.0.1:2", SOCK_STREAM, IPPROTO_TCP);
1320         /* ... and a v6 address of ::1 */
1321         a = ai_find_by_family(local_outcome.ai, PF_INET6);
1322         tt_assert(a);
1323         test_ai_eq(a, "[::1]:2", SOCK_STREAM, IPPROTO_TCP);
1324         evutil_freeaddrinfo(local_outcome.ai);
1325         local_outcome.ai = NULL;
1326 
1327         /* 1g. We find localhost immediately. (pf_unspec) */
1328         memset(&hints, 0, sizeof(hints));
1329         memset(&local_outcome, 0, sizeof(local_outcome));
1330         hints.ai_family = PF_UNSPEC;
1331         hints.ai_socktype = SOCK_STREAM;
1332         r = evdns_getaddrinfo(dns_base, "LOCALHOST", "80",
1333             &hints, gai_cb, &local_outcome);
1334         tt_assert(!r);
1335         tt_int_op(local_outcome.err,==,0);
1336         tt_assert(local_outcome.ai);
1337         /* we should get a v4 address of 127.0.0.1 .... */
1338         a = ai_find_by_family(local_outcome.ai, PF_INET);
1339         tt_assert(a);
1340         test_ai_eq(a, "127.0.0.1:80", SOCK_STREAM, IPPROTO_TCP);
1341         /* ... and a v6 address of ::1 */
1342         a = ai_find_by_family(local_outcome.ai, PF_INET6);
1343         tt_assert(a);
1344         test_ai_eq(a, "[::1]:80", SOCK_STREAM, IPPROTO_TCP);
1345         evutil_freeaddrinfo(local_outcome.ai);
1346         local_outcome.ai = NULL;
1347 
1348         /* 1g. We find localhost immediately. (pf_inet6) */
1349         memset(&hints, 0, sizeof(hints));
1350         memset(&local_outcome, 0, sizeof(local_outcome));
1351         hints.ai_family = PF_INET6;
1352         hints.ai_socktype = SOCK_STREAM;
1353         r = evdns_getaddrinfo(dns_base, "LOCALHOST", "9999",
1354             &hints, gai_cb, &local_outcome);
1355         tt_assert(! r);
1356         tt_int_op(local_outcome.err,==,0);
1357         tt_assert(local_outcome.ai);
1358         a = local_outcome.ai;
1359         test_ai_eq(a, "[::1]:9999", SOCK_STREAM, IPPROTO_TCP);
1360         tt_ptr_op(a->ai_next, ==, NULL);
1361         evutil_freeaddrinfo(local_outcome.ai);
1362         local_outcome.ai = NULL;
1363 
1364         /* 2. Okay, now we can actually test the asynchronous resolver. */
1365         /* Start a dummy local dns server... */
1366         port = regress_get_dnsserver(data->base, &dns_port, NULL,
1367             be_getaddrinfo_server_cb, &n_dns_questions);
1368         tt_assert(port);
1369         tt_int_op(dns_port, >=, 0);
1370         /* ... and tell the evdns_base about it. */
1371         evutil_snprintf(buf, sizeof(buf), "127.0.0.1:%d", dns_port);
1372         evdns_base_nameserver_ip_add(dns_base, buf);
1373 
1374         memset(&hints, 0, sizeof(hints));
1375         hints.ai_family = PF_UNSPEC;
1376         hints.ai_socktype = SOCK_STREAM;
1377         hints.ai_flags = EVUTIL_AI_CANONNAME;
1378         /* 0: Request for both.example.com should return both addresses. */
1379         r = evdns_getaddrinfo(dns_base, "both.example.com", "8000",
1380             &hints, gai_cb, &a_out[0]);
1381         tt_assert(r);
1382 
1383         /* 1: Request for v4only.example.com should return one address. */
1384         r = evdns_getaddrinfo(dns_base, "v4only.example.com", "8001",
1385             &hints, gai_cb, &a_out[1]);
1386         tt_assert(r);
1387 
1388         /* 2: Request for v6only.example.com should return one address. */
1389         hints.ai_flags = 0;
1390         r = evdns_getaddrinfo(dns_base, "v6only.example.com", "8002",
1391             &hints, gai_cb, &a_out[2]);
1392         tt_assert(r);
1393 
1394         /* 3: PF_INET request for v4assert.example.com should not generate a
1395          * v6 request.  The server will fail the test if it does. */
1396         hints.ai_family = PF_INET;
1397         r = evdns_getaddrinfo(dns_base, "v4assert.example.com", "8003",
1398             &hints, gai_cb, &a_out[3]);
1399         tt_assert(r);
1400 
1401         /* 4: PF_INET6 request for v6assert.example.com should not generate a
1402          * v4 request.  The server will fail the test if it does. */
1403         hints.ai_family = PF_INET6;
1404         r = evdns_getaddrinfo(dns_base, "v6assert.example.com", "8004",
1405             &hints, gai_cb, &a_out[4]);
1406         tt_assert(r);
1407 
1408         /* 5: PF_INET request for nosuchplace.example.com should give NEXIST. */
1409         hints.ai_family = PF_INET;
1410         r = evdns_getaddrinfo(dns_base, "nosuchplace.example.com", "8005",
1411             &hints, gai_cb, &a_out[5]);
1412         tt_assert(r);
1413 
1414         /* 6: PF_UNSPEC request for nosuchplace.example.com should give NEXIST.
1415          */
1416         hints.ai_family = PF_UNSPEC;
1417         r = evdns_getaddrinfo(dns_base, "nosuchplace.example.com", "8006",
1418             &hints, gai_cb, &a_out[6]);
1419         tt_assert(r);
1420 
1421         /* 7: PF_UNSPEC request for v6timeout.example.com should give an ipv4
1422          * address only. */
1423         hints.ai_family = PF_UNSPEC;
1424         r = evdns_getaddrinfo(dns_base, "v6timeout.example.com", "8007",
1425             &hints, gai_cb, &a_out[7]);
1426         tt_assert(r);
1427 
1428         /* 8: PF_UNSPEC request for v6timeout-nonexist.example.com should give
1429          * a NEXIST */
1430         hints.ai_family = PF_UNSPEC;
1431         r = evdns_getaddrinfo(dns_base, "v6timeout-nonexist.example.com",
1432             "8008", &hints, gai_cb, &a_out[8]);
1433         tt_assert(r);
1434 
1435         /* 9: AI_ADDRCONFIG should at least not crash.  Can't test it more
1436          * without knowing what kind of internet we have. */
1437         hints.ai_flags |= EVUTIL_AI_ADDRCONFIG;
1438         r = evdns_getaddrinfo(dns_base, "both.example.com",
1439             "8009", &hints, gai_cb, &a_out[9]);
1440         tt_assert(r);
1441 
1442         /* 10: PF_UNSPEC for v4timeout.example.com should give an ipv6 address
1443          * only. */
1444         hints.ai_family = PF_UNSPEC;
1445         hints.ai_flags = 0;
1446         r = evdns_getaddrinfo(dns_base, "v4timeout.example.com", "8010",
1447             &hints, gai_cb, &a_out[10]);
1448         tt_assert(r);
1449 
1450         /* 11: timeout.example.com: cancel it after 100 msec. */
1451         r = evdns_getaddrinfo(dns_base, "all-timeout.example.com", "8011",
1452             &hints, gai_cb, &a_out[11]);
1453         tt_assert(r);
1454         {
1455                 struct timeval tv;
1456                 tv.tv_sec = 0;
1457                 tv.tv_usec = 100*1000; /* 100 msec */
1458                 event_base_once(data->base, -1, EV_TIMEOUT, cancel_gai_cb,
1459                     r, &tv);
1460         }
1461 
1462         /* XXXXX There are more tests we could do, including:
1463 
1464            - A test to elicit NODATA.
1465 
1466          */
1467 
1468         n_gai_results_pending = 12;
1469         exit_base_on_no_pending_results = data->base;
1470 
1471         event_base_dispatch(data->base);
1472 
1473         /* 0: both.example.com */
1474         tt_int_op(a_out[0].err, ==, 0);
1475         tt_assert(a_out[0].ai);
1476         tt_assert(a_out[0].ai->ai_next);
1477         tt_assert(!a_out[0].ai->ai_next->ai_next);
1478         a = ai_find_by_family(a_out[0].ai, PF_INET);
1479         tt_assert(a);
1480         test_ai_eq(a, "80.80.32.32:8000", SOCK_STREAM, IPPROTO_TCP);
1481         a = ai_find_by_family(a_out[0].ai, PF_INET6);
1482         tt_assert(a);
1483         test_ai_eq(a, "[80ff::bbbb]:8000", SOCK_STREAM, IPPROTO_TCP);
1484         tt_assert(a_out[0].ai->ai_canonname);
1485         tt_str_op(a_out[0].ai->ai_canonname, ==, "both-canonical.example.com");
1486 
1487         /* 1: v4only.example.com */
1488         tt_int_op(a_out[1].err, ==, 0);
1489         tt_assert(a_out[1].ai);
1490         tt_assert(! a_out[1].ai->ai_next);
1491         test_ai_eq(a_out[1].ai, "18.52.86.120:8001", SOCK_STREAM, IPPROTO_TCP);
1492         tt_assert(a_out[1].ai->ai_canonname == NULL);
1493 
1494 
1495         /* 2: v6only.example.com */
1496         tt_int_op(a_out[2].err, ==, 0);
1497         tt_assert(a_out[2].ai);
1498         tt_assert(! a_out[2].ai->ai_next);
1499         test_ai_eq(a_out[2].ai, "[b0b::f00d]:8002", SOCK_STREAM, IPPROTO_TCP);
1500 
1501         /* 3: v4assert.example.com */
1502         tt_int_op(a_out[3].err, ==, 0);
1503         tt_assert(a_out[3].ai);
1504         tt_assert(! a_out[3].ai->ai_next);
1505         test_ai_eq(a_out[3].ai, "18.52.86.120:8003", SOCK_STREAM, IPPROTO_TCP);
1506 
1507         /* 4: v6assert.example.com */
1508         tt_int_op(a_out[4].err, ==, 0);
1509         tt_assert(a_out[4].ai);
1510         tt_assert(! a_out[4].ai->ai_next);
1511         test_ai_eq(a_out[4].ai, "[b0b::f00d]:8004", SOCK_STREAM, IPPROTO_TCP);
1512 
1513         /* 5: nosuchplace.example.com (inet) */
1514         tt_int_op(a_out[5].err, ==, EVUTIL_EAI_NONAME);
1515         tt_assert(! a_out[5].ai);
1516 
1517         /* 6: nosuchplace.example.com (unspec) */
1518         tt_int_op(a_out[6].err, ==, EVUTIL_EAI_NONAME);
1519         tt_assert(! a_out[6].ai);
1520 
1521         /* 7: v6timeout.example.com */
1522         tt_int_op(a_out[7].err, ==, 0);
1523         tt_assert(a_out[7].ai);
1524         tt_assert(! a_out[7].ai->ai_next);
1525         test_ai_eq(a_out[7].ai, "171.205.239.1:8007", SOCK_STREAM, IPPROTO_TCP);
1526 
1527         /* 8: v6timeout-nonexist.example.com */
1528         tt_int_op(a_out[8].err, ==, EVUTIL_EAI_NONAME);
1529         tt_assert(! a_out[8].ai);
1530 
1531         /* 9: both (ADDRCONFIG) */
1532         tt_int_op(a_out[9].err, ==, 0);
1533         tt_assert(a_out[9].ai);
1534         a = ai_find_by_family(a_out[9].ai, PF_INET);
1535         if (a)
1536                 test_ai_eq(a, "80.80.32.32:8009", SOCK_STREAM, IPPROTO_TCP);
1537         else
1538                 tt_assert(ai_find_by_family(a_out[9].ai, PF_INET6));
1539         a = ai_find_by_family(a_out[9].ai, PF_INET6);
1540         if (a)
1541                 test_ai_eq(a, "[80ff::bbbb]:8009", SOCK_STREAM, IPPROTO_TCP);
1542         else
1543                 tt_assert(ai_find_by_family(a_out[9].ai, PF_INET));
1544 
1545         /* 10: v4timeout.example.com */
1546         tt_int_op(a_out[10].err, ==, 0);
1547         tt_assert(a_out[10].ai);
1548         tt_assert(! a_out[10].ai->ai_next);
1549         test_ai_eq(a_out[10].ai, "[a0a::ff01]:8010", SOCK_STREAM, IPPROTO_TCP);
1550 
1551         /* 11: cancelled request. */
1552         tt_int_op(a_out[11].err, ==, EVUTIL_EAI_CANCEL);
1553         tt_assert(a_out[11].ai == NULL);
1554 
1555 end:
1556         if (local_outcome.ai)
1557                 evutil_freeaddrinfo(local_outcome.ai);
1558         for (i=0;i<10;++i) {
1559                 if (a_out[i].ai)
1560                         evutil_freeaddrinfo(a_out[i].ai);
1561         }
1562         if (port)
1563                 evdns_close_server_port(port);
1564         if (dns_base)
1565                 evdns_base_free(dns_base, 0);
1566 }
1567 
1568 struct gaic_request_status {
1569         int magic;
1570         struct event_base *base;
1571         struct evdns_base *dns_base;
1572         struct evdns_getaddrinfo_request *request;
1573         struct event cancel_event;
1574         int canceled;
1575 };
1576 
1577 #define GAIC_MAGIC 0x1234abcd
1578 
1579 static int pending = 0;
1580 
1581 static void
1582 gaic_cancel_request_cb(evutil_socket_t fd, short what, void *arg)
1583 {
1584         struct gaic_request_status *status = arg;
1585 
1586         tt_assert(status->magic == GAIC_MAGIC);
1587         status->canceled = 1;
1588         evdns_getaddrinfo_cancel(status->request);
1589         return;
1590 end:
1591         event_base_loopexit(status->base, NULL);
1592 }
1593 
1594 static void
1595 gaic_server_cb(struct evdns_server_request *req, void *arg)
1596 {
1597         ev_uint32_t answer = 0x7f000001;
1598         tt_assert(req->nquestions);
1599         evdns_server_request_add_a_reply(req, req->questions[0]->name, 1,
1600             &answer, 100);
1601         evdns_server_request_respond(req, 0);
1602         return;
1603 end:
1604         evdns_server_request_respond(req, DNS_ERR_REFUSED);
1605 }
1606 
1607 
1608 static void
1609 gaic_getaddrinfo_cb(int result, struct evutil_addrinfo *res, void *arg)
1610 {
1611         struct gaic_request_status *status = arg;
1612         struct event_base *base = status->base;
1613         tt_assert(status->magic == GAIC_MAGIC);
1614 
1615         if (result == EVUTIL_EAI_CANCEL) {
1616                 tt_assert(status->canceled);
1617         }
1618         event_del(&status->cancel_event);
1619 
1620         memset(status, 0xf0, sizeof(*status));
1621         free(status);
1622 
1623 end:
1624         if (--pending <= 0)
1625                 event_base_loopexit(base, NULL);
1626 }
1627 
1628 static void
1629 gaic_launch(struct event_base *base, struct evdns_base *dns_base)
1630 {
1631         struct gaic_request_status *status = calloc(1,sizeof(*status));
1632         struct timeval tv = { 0, 10000 };
1633         status->magic = GAIC_MAGIC;
1634         status->base = base;
1635         status->dns_base = dns_base;
1636         event_assign(&status->cancel_event, base, -1, 0, gaic_cancel_request_cb,
1637             status);
1638         status->request = evdns_getaddrinfo(dns_base,
1639             "foobar.bazquux.example.com", "80", NULL, gaic_getaddrinfo_cb,
1640             status);
1641         event_add(&status->cancel_event, &tv);
1642         ++pending;
1643 }
1644 
1645 #ifdef EVENT_SET_MEM_FUNCTIONS_IMPLEMENTED
1646 /* FIXME: We should move this to regress_main.c if anything else needs it.*/
1647 
1648 /* Trivial replacements for malloc/free/realloc to check for memory leaks.
1649  * Not threadsafe. */
1650 static int allocated_chunks = 0;
1651 
1652 static void *
1653 cnt_malloc(size_t sz)
1654 {
1655         allocated_chunks += 1;
1656         return malloc(sz);
1657 }
1658 
1659 static void *
1660 cnt_realloc(void *old, size_t sz)
1661 {
1662         if (!old)
1663                 allocated_chunks += 1;
1664         if (!sz)
1665                 allocated_chunks -= 1;
1666         return realloc(old, sz);
1667 }
1668 
1669 static void
1670 cnt_free(void *ptr)
1671 {
1672         allocated_chunks -= 1;
1673         free(ptr);
1674 }
1675 
1676 struct testleak_env_t {
1677         struct event_base *base;
1678         struct evdns_base *dns_base;
1679         struct evdns_request *req;
1680         struct generic_dns_callback_result r;
1681 };
1682 
1683 static void *
1684 testleak_setup(const struct testcase_t *testcase)
1685 {
1686         struct testleak_env_t *env;
1687 
1688         allocated_chunks = 0;
1689         event_set_mem_functions(cnt_malloc, cnt_realloc, cnt_free);
1690         event_enable_debug_mode();
1691 
1692         /* not mm_calloc: we don't want to mess with the count. */
1693         env = calloc(1, sizeof(struct testleak_env_t));
1694         env->base = event_base_new();
1695         env->dns_base = evdns_base_new(env->base, 0);
1696         env->req = evdns_base_resolve_ipv4(
1697                 env->dns_base, "example.com", DNS_QUERY_NO_SEARCH,
1698                 generic_dns_callback, &env->r);
1699         return env;
1700 }
1701 
1702 static int
1703 testleak_cleanup(const struct testcase_t *testcase, void *env_)
1704 {
1705         int ok = 0;
1706         struct testleak_env_t *env = env_;
1707         tt_assert(env);
1708 #ifdef _EVENT_DISABLE_DEBUG_MODE
1709         tt_int_op(allocated_chunks, ==, 0);
1710 #else
1711         /* FIXME: that's `1' because of event_debug_map_HT_GROW */
1712         tt_int_op(allocated_chunks, ==, 1);
1713 #endif
1714         ok = 1;
1715 end:
1716         if (env) {
1717                 if (env->dns_base)
1718                         evdns_base_free(env->dns_base, 0);
1719                 if (env->base)
1720                         event_base_free(env->base);
1721                 free(env);
1722         }
1723         return ok;
1724 }
1725 
1726 static struct testcase_setup_t testleak_funcs = {
1727         testleak_setup, testleak_cleanup
1728 };
1729 
1730 static void
1731 test_dbg_leak_cancel(void *env_)
1732 {
1733         /* cancel, loop, free/dns, free/base */
1734         struct testleak_env_t *env = env_;
1735         int send_err_shutdown = 1;
1736         evdns_cancel_request(env->dns_base, env->req);
1737         env->req = 0;
1738 
1739         /* `req` is freed in callback, that's why one loop is required. */
1740         event_base_loop(env->base, EVLOOP_NONBLOCK);
1741 
1742         /* send_err_shutdown means nothing as soon as our request is
1743          * already canceled */
1744         evdns_base_free(env->dns_base, send_err_shutdown);
1745         env->dns_base = 0;
1746         event_base_free(env->base);
1747         env->base = 0;
1748 }
1749 
1750 static void
1751 test_dbg_leak_shutdown(void *env_)
1752 {
1753         /* free/dns, loop, free/base */
1754         struct testleak_env_t *env = env_;
1755         int send_err_shutdown = 1;
1756 
1757         /* `req` is freed both with `send_err_shutdown` and without it,
1758          * the only difference is `evdns_callback` call */
1759         env->req = 0;
1760 
1761         evdns_base_free(env->dns_base, send_err_shutdown);
1762         env->dns_base = 0;
1763 
1764         /* `req` is freed in callback, that's why one loop is required */
1765         event_base_loop(env->base, EVLOOP_NONBLOCK);
1766         event_base_free(env->base);
1767         env->base = 0;
1768 }
1769 #endif
1770 
1771 static void
1772 test_getaddrinfo_async_cancel_stress(void *ptr)
1773 {
1774         struct event_base *base;
1775         struct evdns_base *dns_base = NULL;
1776         struct evdns_server_port *server = NULL;
1777         evutil_socket_t fd = -1;
1778         struct sockaddr_in sin;
1779         struct sockaddr_storage ss;
1780         ev_socklen_t slen;
1781         int i;
1782 
1783         base = event_base_new();
1784         dns_base = evdns_base_new(base, 0);
1785 
1786         memset(&sin, 0, sizeof(sin));
1787         sin.sin_family = AF_INET;
1788         sin.sin_port = 0;
1789         sin.sin_addr.s_addr = htonl(0x7f000001);
1790         if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
1791                 tt_abort_perror("socket");
1792         }
1793         evutil_make_socket_nonblocking(fd);
1794         if (bind(fd, (struct sockaddr*)&sin, sizeof(sin))<0) {
1795                 tt_abort_perror("bind");
1796         }
1797         server = evdns_add_server_port_with_base(base, fd, 0, gaic_server_cb,
1798             base);
1799 
1800         memset(&ss, 0, sizeof(ss));
1801         slen = sizeof(ss);
1802         if (getsockname(fd, (struct sockaddr*)&ss, &slen)<0) {
1803                 tt_abort_perror("getsockname");
1804         }
1805         evdns_base_nameserver_sockaddr_add(dns_base,
1806             (struct sockaddr*)&ss, slen, 0);
1807 
1808         for (i = 0; i < 1000; ++i) {
1809                 gaic_launch(base, dns_base);
1810         }
1811 
1812         event_base_dispatch(base);
1813 
1814 end:
1815         if (dns_base)
1816                 evdns_base_free(dns_base, 1);
1817         if (server)
1818                 evdns_close_server_port(server);
1819         if (fd >= 0)
1820                 evutil_closesocket(fd);
1821 }
1822 
1823 
1824 #define DNS_LEGACY(name, flags)                                        \
1825         { #name, run_legacy_test_fn, flags|TT_LEGACY, &legacy_setup,   \
1826                     dns_##name }
1827 
1828 struct testcase_t dns_testcases[] = {
1829         DNS_LEGACY(server, TT_FORK|TT_NEED_BASE),
1830         DNS_LEGACY(gethostbyname, TT_FORK|TT_NEED_BASE|TT_NEED_DNS),
1831         DNS_LEGACY(gethostbyname6, TT_FORK|TT_NEED_BASE|TT_NEED_DNS),
1832         DNS_LEGACY(gethostbyaddr, TT_FORK|TT_NEED_BASE|TT_NEED_DNS),
1833         { "resolve_reverse", dns_resolve_reverse, TT_FORK, NULL, NULL },
1834         { "search", dns_search_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
1835         { "search_cancel", dns_search_cancel_test,
1836           TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
1837         { "retry", dns_retry_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
1838         { "reissue", dns_reissue_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
1839         { "inflight", dns_inflight_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
1840         { "bufferevent_connect_hostname", test_bufferevent_connect_hostname,
1841           TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
1842 
1843         { "getaddrinfo_async", test_getaddrinfo_async,
1844           TT_FORK|TT_NEED_BASE, &basic_setup, (char*)"" },
1845         { "getaddrinfo_cancel_stress", test_getaddrinfo_async_cancel_stress,
1846           TT_FORK, NULL, NULL },
1847 
1848 #ifdef EVENT_SET_MEM_FUNCTIONS_IMPLEMENTED
1849         { "leak_shutdown", test_dbg_leak_shutdown, TT_FORK, &testleak_funcs, NULL },
1850         { "leak_cancel", test_dbg_leak_cancel, TT_FORK, &testleak_funcs, NULL },
1851 #endif
1852 
1853         END_OF_TESTCASES
1854 };
1855
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root/opal/mca/event/libevent2022/libevent/test/regress_dns.c

DEFINITIONS
