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
regress_get_socket_port(evutil_socket_t fd)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 *
regress_get_dnsserver(struct event_base * base,ev_uint16_t * portnum,evutil_socket_t * psock,evdns_request_callback_fn_type cb,void * arg)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
regress_clean_dnsserver(void)130 regress_clean_dnsserver(void)
131 {
132 if (dns_port) {
133 evdns_close_server_port(dns_port);
134 dns_port = NULL;
135 }
136 if (dns_sock >= 0) {
137 evutil_closesocket(dns_sock);
138 dns_sock = -1;
139 }
140 }
141
strtolower(char * s)142 static void strtolower(char *s)
143 {
144 while (*s) {
145 *s = EVUTIL_TOLOWER_(*s);
146 ++s;
147 }
148 }
149 void
regress_dns_server_cb(struct evdns_server_request * req,void * data)150 regress_dns_server_cb(struct evdns_server_request *req, void *data)
151 {
152 struct regress_dns_server_table *tab = data;
153 char *question;
154
155 if (req->nquestions != 1)
156 TT_DIE(("Only handling one question at a time; got %d",
157 req->nquestions));
158
159 question = req->questions[0]->name;
160
161 while (tab->q && evutil_ascii_strcasecmp(question, tab->q) &&
162 strcmp("*", tab->q))
163 ++tab;
164 if (tab->q == NULL)
165 TT_DIE(("Unexpected question: '%s'", question));
166
167 ++tab->seen;
168
169 if (tab->lower)
170 strtolower(question);
171
172 if (!strcmp(tab->anstype, "err")) {
173 int err = atoi(tab->ans);
174 tt_assert(! evdns_server_request_respond(req, err));
175 return;
176 } else if (!strcmp(tab->anstype, "errsoa")) {
177 int err = atoi(tab->ans);
178 char soa_record[] =
179 "\x04" "dns1" "\x05" "icann" "\x03" "org" "\0"
180 "\x0a" "hostmaster" "\x05" "icann" "\x03" "org" "\0"
181 "\x77\xde\x5e\xba" /* serial */
182 "\x00\x00\x1c\x20" /* refreshtime = 2h */
183 "\x00\x00\x0e\x10" /* retry = 1h */
184 "\x00\x12\x75\x00" /* expiration = 14d */
185 "\x00\x00\x0e\x10" /* min.ttl = 1h */
186 ;
187 evdns_server_request_add_reply(
188 req, EVDNS_AUTHORITY_SECTION,
189 "example.com", EVDNS_TYPE_SOA, EVDNS_CLASS_INET,
190 42, sizeof(soa_record) - 1, 0, soa_record);
191 tt_assert(! evdns_server_request_respond(req, err));
192 return;
193 } else if (!strcmp(tab->anstype, "A")) {
194 struct in_addr in;
195 if (!evutil_inet_pton(AF_INET, tab->ans, &in)) {
196 TT_DIE(("Bad A value %s in table", tab->ans));
197 }
198 evdns_server_request_add_a_reply(req, question, 1, &in.s_addr,
199 100);
200 } else if (!strcmp(tab->anstype, "AAAA")) {
201 struct in6_addr in6;
202 if (!evutil_inet_pton(AF_INET6, tab->ans, &in6)) {
203 TT_DIE(("Bad AAAA value %s in table", tab->ans));
204 }
205 evdns_server_request_add_aaaa_reply(req,
206 question, 1, &in6.s6_addr, 100);
207 } else {
208 TT_DIE(("Weird table entry with type '%s'", tab->anstype));
209 }
210 tt_assert(! evdns_server_request_respond(req, 0))
211 return;
212 end:
213 tt_want(! evdns_server_request_drop(req));
214 }
215
216 int
regress_dnsserver(struct event_base * base,ev_uint16_t * port,struct regress_dns_server_table * search_table)217 regress_dnsserver(struct event_base *base, ev_uint16_t *port,
218 struct regress_dns_server_table *search_table)
219 {
220 dns_port = regress_get_dnsserver(base, port, &dns_sock,
221 regress_dns_server_cb, search_table);
222 return dns_port != NULL;
223 }
224
225 int
regress_get_listener_addr(struct evconnlistener * lev,struct sockaddr * sa,ev_socklen_t * socklen)226 regress_get_listener_addr(struct evconnlistener *lev,
227 struct sockaddr *sa, ev_socklen_t *socklen)
228 {
229 evutil_socket_t s = evconnlistener_get_fd(lev);
230 if (s <= 0)
231 return -1;
232 return getsockname(s, sa, socklen);
233 }
234