1 /* $NetBSD: regress_testutils.c,v 1.5 2020/05/25 20:47:34 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2010-2012 Niels Provos and Nick Mathewson 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 #include "../util-internal.h" 29 30 #ifdef _WIN32 31 #include <winsock2.h> 32 #include <windows.h> 33 #include <ws2tcpip.h> 34 #endif 35 36 #include "event2/event-config.h" 37 38 #include <sys/types.h> 39 #include <sys/stat.h> 40 #ifdef EVENT__HAVE_SYS_TIME_H 41 #include <sys/time.h> 42 #endif 43 #include <sys/queue.h> 44 #ifndef _WIN32 45 #include <sys/socket.h> 46 #include <signal.h> 47 #include <netinet/in.h> 48 #include <arpa/inet.h> 49 #include <unistd.h> 50 #endif 51 #ifdef EVENT__HAVE_NETINET_IN6_H 52 #include <netinet/in6.h> 53 #endif 54 #ifdef HAVE_NETDB_H 55 #include <netdb.h> 56 #endif 57 #include <fcntl.h> 58 #include <stdlib.h> 59 #include <stdio.h> 60 #include <string.h> 61 #include <errno.h> 62 63 #include "event2/dns.h" 64 #include "event2/dns_struct.h" 65 #include "event2/event.h" 66 #include "event2/event_compat.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 /* globals */ 75 static struct evdns_server_port *dns_port; 76 evutil_socket_t dns_sock = -1; 77 78 /* Helper: return the port that a socket is bound on, in host order. */ 79 int 80 regress_get_socket_port(evutil_socket_t fd) 81 { 82 struct sockaddr_storage ss; 83 ev_socklen_t socklen = sizeof(ss); 84 if (getsockname(fd, (struct sockaddr*)&ss, &socklen) != 0) 85 return -1; 86 if (ss.ss_family == AF_INET) 87 return ntohs( ((struct sockaddr_in*)&ss)->sin_port); 88 else if (ss.ss_family == AF_INET6) 89 return ntohs( ((struct sockaddr_in6*)&ss)->sin6_port); 90 else 91 return -1; 92 } 93 94 struct evdns_server_port * 95 regress_get_dnsserver(struct event_base *base, 96 ev_uint16_t *portnum, 97 evutil_socket_t *psock, 98 evdns_request_callback_fn_type cb, 99 void *arg) 100 { 101 struct evdns_server_port *port = NULL; 102 evutil_socket_t sock; 103 struct sockaddr_in my_addr; 104 105 sock = socket(AF_INET, SOCK_DGRAM, 0); 106 if (sock < 0) { 107 tt_abort_perror("socket"); 108 } 109 110 evutil_make_socket_nonblocking(sock); 111 112 memset(&my_addr, 0, sizeof(my_addr)); 113 my_addr.sin_family = AF_INET; 114 my_addr.sin_port = htons(*portnum); 115 my_addr.sin_addr.s_addr = htonl(0x7f000001UL); 116 if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr)) < 0) { 117 evutil_closesocket(sock); 118 tt_abort_perror("bind"); 119 } 120 port = evdns_add_server_port_with_base(base, sock, 0, cb, arg); 121 if (!*portnum) 122 *portnum = regress_get_socket_port(sock); 123 if (psock) 124 *psock = sock; 125 126 return port; 127 end: 128 return NULL; 129 } 130 131 void 132 regress_clean_dnsserver(void) 133 { 134 if (dns_port) 135 evdns_close_server_port(dns_port); 136 if (dns_sock >= 0) 137 evutil_closesocket(dns_sock); 138 } 139 140 void 141 regress_dns_server_cb(struct evdns_server_request *req, void *data) 142 { 143 struct regress_dns_server_table *tab = data; 144 const char *question; 145 146 if (req->nquestions != 1) 147 TT_DIE(("Only handling one question at a time; got %d", 148 req->nquestions)); 149 150 question = req->questions[0]->name; 151 152 while (tab->q && evutil_ascii_strcasecmp(question, tab->q) && 153 strcmp("*", tab->q)) 154 ++tab; 155 if (tab->q == NULL) 156 TT_DIE(("Unexpected question: '%s'", question)); 157 158 ++tab->seen; 159 160 if (!strcmp(tab->anstype, "err")) { 161 int err = atoi(tab->ans); 162 tt_assert(! evdns_server_request_respond(req, err)); 163 return; 164 } else if (!strcmp(tab->anstype, "errsoa")) { 165 int err = atoi(tab->ans); 166 char soa_record[] = 167 "\x04" "dns1" "\x05" "icann" "\x03" "org" "\0" 168 "\x0a" "hostmaster" "\x05" "icann" "\x03" "org" "\0" 169 "\x77\xde\x5e\xba" /* serial */ 170 "\x00\x00\x1c\x20" /* refreshtime = 2h */ 171 "\x00\x00\x0e\x10" /* retry = 1h */ 172 "\x00\x12\x75\x00" /* expiration = 14d */ 173 "\x00\x00\x0e\x10" /* min.ttl = 1h */ 174 ; 175 evdns_server_request_add_reply( 176 req, EVDNS_AUTHORITY_SECTION, 177 "example.com", EVDNS_TYPE_SOA, EVDNS_CLASS_INET, 178 42, sizeof(soa_record) - 1, 0, soa_record); 179 tt_assert(! evdns_server_request_respond(req, err)); 180 return; 181 } else if (!strcmp(tab->anstype, "A")) { 182 struct in_addr in; 183 if (!evutil_inet_pton(AF_INET, tab->ans, &in)) { 184 TT_DIE(("Bad A value %s in table", tab->ans)); 185 } 186 evdns_server_request_add_a_reply(req, question, 1, &in.s_addr, 187 100); 188 } else if (!strcmp(tab->anstype, "AAAA")) { 189 struct in6_addr in6; 190 if (!evutil_inet_pton(AF_INET6, tab->ans, &in6)) { 191 TT_DIE(("Bad AAAA value %s in table", tab->ans)); 192 } 193 evdns_server_request_add_aaaa_reply(req, 194 question, 1, &in6.s6_addr, 100); 195 } else { 196 TT_DIE(("Weird table entry with type '%s'", tab->anstype)); 197 } 198 tt_assert(! evdns_server_request_respond(req, 0)) 199 return; 200 end: 201 tt_want(! evdns_server_request_drop(req)); 202 } 203 204 int 205 regress_dnsserver(struct event_base *base, ev_uint16_t *port, 206 struct regress_dns_server_table *search_table) 207 { 208 dns_port = regress_get_dnsserver(base, port, &dns_sock, 209 regress_dns_server_cb, search_table); 210 return dns_port != NULL; 211 } 212 213 int 214 regress_get_listener_addr(struct evconnlistener *lev, 215 struct sockaddr *sa, ev_socklen_t *socklen) 216 { 217 evutil_socket_t s = evconnlistener_get_fd(lev); 218 if (s <= 0) 219 return -1; 220 return getsockname(s, sa, socklen); 221 } 222