regress_testutils.c revision 290001 
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 */
73static struct evdns_server_port *dns_port;
74evutil_socket_t dns_sock = -1;
75
76/* Helper: return the port that a socket is bound on, in host order. */
77int
78regress_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
92struct evdns_server_port *
93regress_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;
125end:
126	return NULL;
127}
128
129void
130regress_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
138void
139regress_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;
198end:
199	tt_want(! evdns_server_request_drop(req));
200}
201
202int
203regress_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
211int
212regress_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