release/src/router/dnscrypt/src/libevent-modified/test/regress_testutils.c

   1 /*
   2  * Copyright (c) 2010-2012 Niels Provos and Nick Mathewson
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  * 3. The name of the author may not be used to endorse or promote products
  13  *    derived from this software without specific prior written permission.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #ifdef WIN32
  28 #include <winsock2.h>
  29 #include <windows.h>
  30 #include <ws2tcpip.h>
  31 #endif
  32
  33 #include "event2/event-config.h"
  34
  35 #include <sys/types.h>
  36 #include <sys/stat.h>
  37 #ifdef _EVENT_HAVE_SYS_TIME_H
  38 #include <sys/time.h>
  39 #endif
  40 #include <sys/queue.h>
  41 #ifndef WIN32
  42 #include <sys/socket.h>
  43 #include <signal.h>
  44 #include <netinet/in.h>
  45 #include <arpa/inet.h>
  46 #include <unistd.h>
  47 #endif
  48 #ifdef _EVENT_HAVE_NETINET_IN6_H
  49 #include <netinet/in6.h>
  50 #endif
  51 #ifdef HAVE_NETDB_H
  52 #include <netdb.h>
  53 #endif
  54 #include <fcntl.h>
  55 #include <stdlib.h>
  56 #include <stdio.h>
  57 #include <string.h>
  58 #include <errno.h>
  59
  60 #include "event2/dns.h"
  61 #include "event2/dns_struct.h"
  62 #include "event2/event.h"
  63 #include "event2/event_compat.h"
  64 #include "event2/util.h"
  65 #include "event2/listener.h"
  66 #include "event2/bufferevent.h"
  67 #include "log-internal.h"
  68 #include "regress.h"
  69 #include "regress_testutils.h"
  70
  71 #include "../util-internal.h"
  72
  73 /* globals */
  74 static struct evdns_server_port *dns_port;
  75 evutil_socket_t dns_sock = -1;
  76
  77 /* Helper: return the port that a socket is bound on, in host order. */
  78 int
  79 regress_get_socket_port(evutil_socket_t fd)
  80 {
  81         struct sockaddr_storage ss;
  82         ev_socklen_t socklen = sizeof(ss);
  83         if (getsockname(fd, (struct sockaddr*)&ss, &socklen) != 0)
  84                 return -1;
  85         if (ss.ss_family == AF_INET)
  86                 return ntohs( ((struct sockaddr_in*)&ss)->sin_port);
  87         else if (ss.ss_family == AF_INET6)
  88                 return ntohs( ((struct sockaddr_in6*)&ss)->sin6_port);
  89         else
  90                 return -1;
  91 }
  92
  93 struct evdns_server_port *
  94 regress_get_dnsserver(struct event_base *base,
  95     ev_uint16_t *portnum,
  96     evutil_socket_t *psock,
  97     evdns_request_callback_fn_type cb,
  98     void *arg)
  99 {
 100         struct evdns_server_port *port = NULL;
 101         evutil_socket_t sock;
 102         struct sockaddr_in my_addr;
 103
 104         sock = socket(AF_INET, SOCK_DGRAM, 0);
 105         if (sock < 0) {
 106                 tt_abort_perror("socket");
 107         }
 108
 109         evutil_make_socket_nonblocking(sock);
 110
 111         memset(&my_addr, 0, sizeof(my_addr));
 112         my_addr.sin_family = AF_INET;
 113         my_addr.sin_port = htons(*portnum);
 114         my_addr.sin_addr.s_addr = htonl(0x7f000001UL);
 115         if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr)) < 0) {
 116                 evutil_closesocket(sock);
 117                 tt_abort_perror("bind");
 118         }
 119         port = evdns_add_server_port_with_base(base, sock, 0, cb, arg);
 120         if (!*portnum)
 121                 *portnum = regress_get_socket_port(sock);
 122         if (psock)
 123                 *psock = sock;
 124
 125         return port;
 126 end:
 127         return NULL;
 128 }
 129
 130 void
 131 regress_clean_dnsserver(void)
 132 {
 133         if (dns_port)
 134                 evdns_close_server_port(dns_port);
 135         if (dns_sock >= 0)
 136                 evutil_closesocket(dns_sock);
 137 }
 138
 139 void
 140 regress_dns_server_cb(struct evdns_server_request *req, void *data)
 141 {
 142         struct regress_dns_server_table *tab = data;
 143         const char *question;
 144
 145         if (req->nquestions != 1)
 146                 TT_DIE(("Only handling one question at a time; got %d",
 147                         req->nquestions));
 148
 149         question = req->questions[0]->name;
 150
 151         while (tab->q && evutil_ascii_strcasecmp(question, tab->q) &&
 152             strcmp("*", tab->q))
 153                 ++tab;
 154         if (tab->q == NULL)
 155                 TT_DIE(("Unexpected question: '%s'", question));
 156
 157         ++tab->seen;
 158
 159         if (!strcmp(tab->anstype, "err")) {
 160                 int err = atoi(tab->ans);
 161                 tt_assert(! evdns_server_request_respond(req, err));
 162                 return;
 163         } else if (!strcmp(tab->anstype, "errsoa")) {
 164                 int err = atoi(tab->ans);
 165                 char soa_record[] =
 166                         "\x04" "dns1" "\x05" "icann" "\x03" "org" "\0"
 167                         "\x0a" "hostmaster" "\x05" "icann" "\x03" "org" "\0"
 168                         "\x77\xde\x5e\xba" /* serial */
 169                         "\x00\x00\x1c\x20" /* refreshtime = 2h */
 170                         "\x00\x00\x0e\x10" /* retry = 1h */
 171                         "\x00\x12\x75\x00" /* expiration = 14d */
 172                         "\x00\x00\x0e\x10" /* min.ttl = 1h */
 173                         ;
 174                 evdns_server_request_add_reply(
 175                         req, EVDNS_AUTHORITY_SECTION,
 176                         "example.com", EVDNS_TYPE_SOA, EVDNS_CLASS_INET,
 177                         42, sizeof(soa_record) - 1, 0, soa_record);
 178                 tt_assert(! evdns_server_request_respond(req, err));
 179                 return;
 180         } else if (!strcmp(tab->anstype, "A")) {
 181                 struct in_addr in;
 182                 if (!evutil_inet_pton(AF_INET, tab->ans, &in)) {
 183                         TT_DIE(("Bad A value %s in table", tab->ans));
 184                 }
 185                 evdns_server_request_add_a_reply(req, question, 1, &in.s_addr,
 186                     100);
 187         } else if (!strcmp(tab->anstype, "AAAA")) {
 188                 struct in6_addr in6;
 189                 if (!evutil_inet_pton(AF_INET6, tab->ans, &in6)) {
 190                         TT_DIE(("Bad AAAA value %s in table", tab->ans));
 191                 }
 192                 evdns_server_request_add_aaaa_reply(req,
 193                     question, 1, &in6.s6_addr, 100);
 194         } else {
 195                 TT_DIE(("Weird table entry with type '%s'", tab->anstype));
 196         }
 197         tt_assert(! evdns_server_request_respond(req, 0))
 198         return;
 199 end:
 200         tt_want(! evdns_server_request_drop(req));
 201 }
 202
 203 int
 204 regress_dnsserver(struct event_base *base, ev_uint16_t *port,
 205     struct regress_dns_server_table *search_table)
 206 {
 207         dns_port = regress_get_dnsserver(base, port, &dns_sock,
 208             regress_dns_server_cb, search_table);
 209         return dns_port != NULL;
 210 }
 211
 212 int
 213 regress_get_listener_addr(struct evconnlistener *lev,
 214     struct sockaddr *sa, ev_socklen_t *socklen)
 215 {
 216         evutil_socket_t s = evconnlistener_get_fd(lev);
 217         if (s <= 0)
 218                 return -1;
 219         return getsockname(s, sa, socklen);
 220 }