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 #include "../util-internal.h" 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_struct.h" 63 #include "event2/event.h" 64 #include "event2/event_compat.h" 65 #include "event2/util.h" 66 #include "event2/listener.h" 67 #include "event2/bufferevent.h" 68 #include "log-internal.h" 69 #include "regress.h" 70 #include "regress_testutils.h" 71 72 /* globals */ 73 static struct evdns_server_port *dns_port; 74 evutil_socket_t dns_sock = -1; 75 76 /* Helper: return the port that a socket is bound on, in host order. */ 77 int 78 regress_get_socket_port(evutil_socket_t fd) 79 { 80 struct sockaddr_storage ss; 81 ev_socklen_t socklen = sizeof(ss); 82 if (getsockname(fd, (struct sockaddr*)&ss, &socklen) != 0) 83 return -1; 84 if (ss.ss_family == AF_INET) 85 return ntohs( ((struct sockaddr_in*)&ss)->sin_port); 86 else if (ss.ss_family == AF_INET6) 87 return ntohs( ((struct sockaddr_in6*)&ss)->sin6_port); 88 else 89 return -1; 90 } 91 92 struct evdns_server_port * 93 regress_get_dnsserver(struct event_base *base, 94 ev_uint16_t *portnum, 95 evutil_socket_t *psock, 96 evdns_request_callback_fn_type cb, 97 void *arg) 98 { 99 struct evdns_server_port *port = NULL; 100 evutil_socket_t sock; 101 struct sockaddr_in my_addr; 102 103 sock = socket(AF_INET, SOCK_DGRAM, 0); 104 if (sock < 0) { 105 tt_abort_perror("socket"); 106 } 107 108 evutil_make_socket_nonblocking(sock); 109 110 memset(&my_addr, 0, sizeof(my_addr)); 111 my_addr.sin_family = AF_INET; 112 my_addr.sin_port = htons(*portnum); 113 my_addr.sin_addr.s_addr = htonl(0x7f000001UL); 114 if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr)) < 0) { 115 evutil_closesocket(sock); 116 tt_abort_perror("bind"); 117 } 118 port = evdns_add_server_port_with_base(base, sock, 0, cb, arg); 119 if (!*portnum) 120 *portnum = regress_get_socket_port(sock); 121 if (psock) 122 *psock = sock; 123 124 return port; 125 end: 126 return NULL; 127 } 128 129 void 130 regress_clean_dnsserver(void) 131 { 132 if (dns_port) 133 evdns_close_server_port(dns_port); 134 if (dns_sock >= 0) 135 evutil_closesocket(dns_sock); 136 } 137 138 void 139 regress_dns_server_cb(struct evdns_server_request *req, void *data) 140 { 141 struct regress_dns_server_table *tab = data; 142 const char *question; 143 144 if (req->nquestions != 1) 145 TT_DIE(("Only handling one question at a time; got %d", 146 req->nquestions)); 147 148 question = req->questions[0]->name; 149 150 while (tab->q && evutil_ascii_strcasecmp(question, tab->q) && 151 strcmp("*", tab->q)) 152 ++tab; 153 if (tab->q == NULL) 154 TT_DIE(("Unexpected question: '%s'", question)); 155 156 ++tab->seen; 157 158 if (!strcmp(tab->anstype, "err")) { 159 int err = atoi(tab->ans); 160 tt_assert(! evdns_server_request_respond(req, err)); 161 return; 162 } else if (!strcmp(tab->anstype, "errsoa")) { 163 int err = atoi(tab->ans); 164 char soa_record[] = 165 "\x04" "dns1" "\x05" "icann" "\x03" "org" "\0" 166 "\x0a" "hostmaster" "\x05" "icann" "\x03" "org" "\0" 167 "\x77\xde\x5e\xba" /* serial */ 168 "\x00\x00\x1c\x20" /* refreshtime = 2h */ 169 "\x00\x00\x0e\x10" /* retry = 1h */ 170 "\x00\x12\x75\x00" /* expiration = 14d */ 171 "\x00\x00\x0e\x10" /* min.ttl = 1h */ 172 ; 173 evdns_server_request_add_reply( 174 req, EVDNS_AUTHORITY_SECTION, 175 "example.com", EVDNS_TYPE_SOA, EVDNS_CLASS_INET, 176 42, sizeof(soa_record) - 1, 0, soa_record); 177 tt_assert(! evdns_server_request_respond(req, err)); 178 return; 179 } else if (!strcmp(tab->anstype, "A")) { 180 struct in_addr in; 181 if (!evutil_inet_pton(AF_INET, tab->ans, &in)) { 182 TT_DIE(("Bad A value %s in table", tab->ans)); 183 } 184 evdns_server_request_add_a_reply(req, question, 1, &in.s_addr, 185 100); 186 } else if (!strcmp(tab->anstype, "AAAA")) { 187 struct in6_addr in6; 188 if (!evutil_inet_pton(AF_INET6, tab->ans, &in6)) { 189 TT_DIE(("Bad AAAA value %s in table", tab->ans)); 190 } 191 evdns_server_request_add_aaaa_reply(req, 192 question, 1, &in6.s6_addr, 100); 193 } else { 194 TT_DIE(("Weird table entry with type '%s'", tab->anstype)); 195 } 196 tt_assert(! evdns_server_request_respond(req, 0)) 197 return; 198 end: 199 tt_want(! evdns_server_request_drop(req)); 200 } 201 202 int 203 regress_dnsserver(struct event_base *base, ev_uint16_t *port, 204 struct regress_dns_server_table *search_table) 205 { 206 dns_port = regress_get_dnsserver(base, port, &dns_sock, 207 regress_dns_server_cb, search_table); 208 return dns_port != NULL; 209 } 210 211 int 212 regress_get_listener_addr(struct evconnlistener *lev, 213 struct sockaddr *sa, ev_socklen_t *socklen) 214 { 215 evutil_socket_t s = evconnlistener_get_fd(lev); 216 if (s <= 0) 217 return -1; 218 return getsockname(s, sa, socklen); 219 } 220