base/third_party/libevent/test/regress_dns.c - chromium/src - Git at Google

 /*
  * Copyright (c) 2003-2006 Niels Provos <provos@citi.umich.edu>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. The name of the author may not be used to endorse or promote products
  *    derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #ifdef WIN32
 #include <winsock2.h>
 #include <windows.h>
 #endif

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

 #include <sys/types.h>
 #include <sys/stat.h>
 #ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
 #endif
 #include <sys/queue.h>
 #ifndef WIN32
 #include <sys/socket.h>
 #include <signal.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <unistd.h>
 #endif
 #ifdef HAVE_NETINET_IN6_H
 #include <netinet/in6.h>
 #endif
 #ifdef HAVE_NETDB_H
 #include <netdb.h>
 #endif
 #include <fcntl.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <errno.h>

 #include "event.h"
 #include "evdns.h"
 #include "log.h"

 static int dns_ok = 0;
 static int dns_err = 0;

 void dns_suite(void);

 static void
 dns_gethostbyname_cb(int result, char type, int count, int ttl,
     void *addresses, void *arg)
 {
 	dns_ok = dns_err = 0;

 	if (result == DNS_ERR_TIMEOUT) {
 		fprintf(stdout, "[Timed out] ");
 		dns_err = result;
 		goto out;
 	}

 	if (result != DNS_ERR_NONE) {
 		fprintf(stdout, "[Error code %d] ", result);
 		goto out;
 	}

 	fprintf(stderr, "type: %d, count: %d, ttl: %d: ", type, count, ttl);

 	switch (type) {
 	case DNS_IPv6_AAAA: {
 #if defined(HAVE_STRUCT_IN6_ADDR) && defined(HAVE_INET_NTOP) && defined(INET6_ADDRSTRLEN)
 		struct in6_addr *in6_addrs = addresses;
 		char buf[INET6_ADDRSTRLEN+1];
 		int i;
 		/* a resolution that's not valid does not help */
 		if (ttl < 0)
 			goto out;
 		for (i = 0; i < count; ++i) {
 			const char *b = inet_ntop(AF_INET6, &in6_addrs[i], buf,sizeof(buf));
 			if (b)
 				fprintf(stderr, "%s ", b);
 			else
 				fprintf(stderr, "%s ", strerror(errno));
 		}
 #endif
 		break;
 	}
 	case DNS_IPv4_A: {
 		struct in_addr *in_addrs = addresses;
 		int i;
 		/* a resolution that's not valid does not help */
 		if (ttl < 0)
 			goto out;
 		for (i = 0; i < count; ++i)
 			fprintf(stderr, "%s ", inet_ntoa(in_addrs[i]));
 		break;
 	}
 	case DNS_PTR:
 		/* may get at most one PTR */
 		if (count != 1)
 			goto out;

 		fprintf(stderr, "%s ", *(char **)addresses);
 		break;
 	default:
 		goto out;
 	}

 	dns_ok = type;

 out:
 	event_loopexit(NULL);
 }

 static void
 dns_gethostbyname(void)
 {
 	fprintf(stdout, "Simple DNS resolve: ");
 	dns_ok = 0;
 	evdns_resolve_ipv4("www.monkey.org", 0, dns_gethostbyname_cb, NULL);
 	event_dispatch();

 	if (dns_ok == DNS_IPv4_A) {
 		fprintf(stdout, "OK\n");
 	} else {
 		fprintf(stdout, "FAILED\n");
 		exit(1);
 	}
 }

 static void
 dns_gethostbyname6(void)
 {
 	fprintf(stdout, "IPv6 DNS resolve: ");
 	dns_ok = 0;
 	evdns_resolve_ipv6("www.ietf.org", 0, dns_gethostbyname_cb, NULL);
 	event_dispatch();

 	if (dns_ok == DNS_IPv6_AAAA) {
 		fprintf(stdout, "OK\n");
 	} else if (!dns_ok && dns_err == DNS_ERR_TIMEOUT) {
 		fprintf(stdout, "SKIPPED\n");
 	} else {
 		fprintf(stdout, "FAILED (%d)\n", dns_ok);
 		exit(1);
 	}
 }

 static void
 dns_gethostbyaddr(void)
 {
 	struct in_addr in;
 	in.s_addr = htonl(0x7f000001ul); /* 127.0.0.1 */
 	fprintf(stdout, "Simple reverse DNS resolve: ");
 	dns_ok = 0;
 	evdns_resolve_reverse(&in, 0, dns_gethostbyname_cb, NULL);
 	event_dispatch();

 	if (dns_ok == DNS_PTR) {
 		fprintf(stdout, "OK\n");
 	} else {
 		fprintf(stdout, "FAILED\n");
 		exit(1);
 	}
 }

 static int n_server_responses = 0;

 static void
 dns_server_request_cb(struct evdns_server_request *req, void *data)
 {
 	int i, r;
 	const char TEST_ARPA[] = "11.11.168.192.in-addr.arpa";
 	for (i = 0; i < req->nquestions; ++i) {
 		struct in_addr ans;
 		ans.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
 		if (req->questions[i]->type == EVDNS_TYPE_A &&
 			req->questions[i]->dns_question_class == EVDNS_CLASS_INET &&
 			!strcmp(req->questions[i]->name, "zz.example.com")) {
 			r = evdns_server_request_add_a_reply(req, "zz.example.com",
 												 1, &ans.s_addr, 12345);
 			if (r<0)
 				dns_ok = 0;
 		} else if (req->questions[i]->type == EVDNS_TYPE_AAAA &&
 				   req->questions[i]->dns_question_class == EVDNS_CLASS_INET &&
 				   !strcmp(req->questions[i]->name, "zz.example.com")) {
 			char addr6[17] = "abcdefghijklmnop";
 			r = evdns_server_request_add_aaaa_reply(req, "zz.example.com",
 												 1, addr6, 123);
 			if (r<0)
 				dns_ok = 0;
 		} else if (req->questions[i]->type == EVDNS_TYPE_PTR &&
 				   req->questions[i]->dns_question_class == EVDNS_CLASS_INET &&
 				   !strcmp(req->questions[i]->name, TEST_ARPA)) {
 			r = evdns_server_request_add_ptr_reply(req, NULL, TEST_ARPA,
 					   "ZZ.EXAMPLE.COM", 54321);
 			if (r<0)
 				dns_ok = 0;
 		} else {
 			fprintf(stdout, "Unexpected question %d %d \"%s\" ",
 					req->questions[i]->type,
 					req->questions[i]->dns_question_class,
 					req->questions[i]->name);
 			dns_ok = 0;
 		}
 	}
 	r = evdns_server_request_respond(req, 0);
 	if (r<0) {
 		fprintf(stdout, "Couldn't send reply. ");
 		dns_ok = 0;
 	}
 }

 static void
 dns_server_gethostbyname_cb(int result, char type, int count, int ttl,
 							void *addresses, void *arg)
 {
 	if (result != DNS_ERR_NONE) {
 		fprintf(stdout, "Unexpected result %d. ", result);
 		dns_ok = 0;
 		goto out;
 	}
 	if (count != 1) {
 		fprintf(stdout, "Unexpected answer count %d. ", count);
 		dns_ok = 0;
 		goto out;
 	}
 	switch (type) {
 	case DNS_IPv4_A: {
 		struct in_addr *in_addrs = addresses;
 		if (in_addrs[0].s_addr != htonl(0xc0a80b0bUL) || ttl != 12345) {
 			fprintf(stdout, "Bad IPv4 response \"%s\" %d. ",
 					inet_ntoa(in_addrs[0]), ttl);
 			dns_ok = 0;
 			goto out;
 		}
 		break;
 	}
 	case DNS_IPv6_AAAA: {
 #if defined (HAVE_STRUCT_IN6_ADDR) && defined(HAVE_INET_NTOP) && defined(INET6_ADDRSTRLEN)
 		struct in6_addr *in6_addrs = addresses;
 		char buf[INET6_ADDRSTRLEN+1];
 		if (memcmp(&in6_addrs[0].s6_addr, "abcdefghijklmnop", 16)
 			|| ttl != 123) {
 			const char *b = inet_ntop(AF_INET6, &in6_addrs[0],buf,sizeof(buf));
 			fprintf(stdout, "Bad IPv6 response \"%s\" %d. ", b, ttl);
 			dns_ok = 0;
 			goto out;
 		}
 #endif
 		break;
 	}
 	case DNS_PTR: {
 		char **addrs = addresses;
 		if (strcmp(addrs[0], "ZZ.EXAMPLE.COM") || ttl != 54321) {
 			fprintf(stdout, "Bad PTR response \"%s\" %d. ",
 					addrs[0], ttl);
 			dns_ok = 0;
 			goto out;
 		}
 		break;
 	}
 	default:
 		fprintf(stdout, "Bad response type %d. ", type);
 		dns_ok = 0;
 	}

  out:
 	if (++n_server_responses == 3) {
 		event_loopexit(NULL);
 	}
 }

 static void
 dns_server(void)
 {
 	int sock;
 	struct sockaddr_in my_addr;
 	struct evdns_server_port *port;
 	struct in_addr resolve_addr;

 	dns_ok = 1;
 	fprintf(stdout, "DNS server support: ");

 	/* Add ourself as the only nameserver, and make sure we really are
 	 * the only nameserver. */
 	evdns_nameserver_ip_add("127.0.0.1:35353");
 	if (evdns_count_nameservers() != 1) {
 		fprintf(stdout, "Couldn't set up.\n");
 		exit(1);
 	}

 	/* Now configure a nameserver port. */
 	sock = socket(AF_INET, SOCK_DGRAM, 0);
 	if (sock == -1) {
 		perror("socket");
 		exit(1);
 	}
 #ifdef WIN32
 	{
 		u_long nonblocking = 1;
 		ioctlsocket(sock, FIONBIO, &nonblocking);
 	}
 #else
 	fcntl(sock, F_SETFL, O_NONBLOCK);
 #endif
 	memset(&my_addr, 0, sizeof(my_addr));
 	my_addr.sin_family = AF_INET;
 	my_addr.sin_port = htons(35353);
 	my_addr.sin_addr.s_addr = htonl(0x7f000001UL);
 	if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr)) < 0) {
 		perror("bind");
 		exit (1);
 	}
 	port = evdns_add_server_port(sock, 0, dns_server_request_cb, NULL);

 	/* Send two queries. */
 	evdns_resolve_ipv4("zz.example.com", DNS_QUERY_NO_SEARCH,
 					   dns_server_gethostbyname_cb, NULL);
 	evdns_resolve_ipv6("zz.example.com", DNS_QUERY_NO_SEARCH,
 					   dns_server_gethostbyname_cb, NULL);
 	resolve_addr.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
 	evdns_resolve_reverse(&resolve_addr, 0,
 						  dns_server_gethostbyname_cb, NULL);

 	event_dispatch();

 	if (dns_ok) {
 		fprintf(stdout, "OK\n");
 	} else {
 		fprintf(stdout, "FAILED\n");
 		exit(1);
 	}

 	evdns_close_server_port(port);
 	evdns_shutdown(0); /* remove ourself as nameserver. */
 #ifdef WIN32
 	closesocket(sock);
 #else
 	close(sock);
 #endif
 }

 void
 dns_suite(void)
 {
 	dns_server(); /* Do this before we call evdns_init. */

 	evdns_init();
 	dns_gethostbyname();
 	dns_gethostbyname6();
 	dns_gethostbyaddr();

 	evdns_shutdown(0);
 }
	/*
	* Copyright (c) 2003-2006 Niels Provos <provos@citi.umich.edu>
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. The name of the author may not be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#ifdef WIN32
	#include <winsock2.h>
	#include <windows.h>
	#endif

	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif

	#include <sys/types.h>
	#include <sys/stat.h>
	#ifdef HAVE_SYS_TIME_H
	#include <sys/time.h>
	#endif
	#include <sys/queue.h>
	#ifndef WIN32
	#include <sys/socket.h>
	#include <signal.h>
	#include <netinet/in.h>
	#include <arpa/inet.h>
	#include <unistd.h>
	#endif
	#ifdef HAVE_NETINET_IN6_H
	#include <netinet/in6.h>
	#endif
	#ifdef HAVE_NETDB_H
	#include <netdb.h>
	#endif
	#include <fcntl.h>
	#include <stdlib.h>
	#include <stdio.h>
	#include <string.h>
	#include <errno.h>

	#include "event.h"
	#include "evdns.h"
	#include "log.h"

	static int dns_ok = 0;
	static int dns_err = 0;

	void dns_suite(void);

	static void
	dns_gethostbyname_cb(int result, char type, int count, int ttl,
	void addresses, void arg)
	{
	dns_ok = dns_err = 0;

	if (result == DNS_ERR_TIMEOUT) {
	fprintf(stdout, "[Timed out] ");
	dns_err = result;
	goto out;
	}

	if (result != DNS_ERR_NONE) {
	fprintf(stdout, "[Error code %d] ", result);
	goto out;
	}

	fprintf(stderr, "type: %d, count: %d, ttl: %d: ", type, count, ttl);

	switch (type) {
	case DNS_IPv6_AAAA: {
	#if defined(HAVE_STRUCT_IN6_ADDR) && defined(HAVE_INET_NTOP) && defined(INET6_ADDRSTRLEN)
	struct in6_addr *in6_addrs = addresses;
	char buf[INET6_ADDRSTRLEN+1];
	int i;
	/* a resolution that's not valid does not help */
	if (ttl < 0)
	goto out;
	for (i = 0; i < count; ++i) {
	const char *b = inet_ntop(AF_INET6, &in6_addrs[i], buf,sizeof(buf));
	if (b)
	fprintf(stderr, "%s ", b);
	else
	fprintf(stderr, "%s ", strerror(errno));
	}
	#endif
	break;
	}
	case DNS_IPv4_A: {
	struct in_addr *in_addrs = addresses;
	int i;
	/* a resolution that's not valid does not help */
	if (ttl < 0)
	goto out;
	for (i = 0; i < count; ++i)
	fprintf(stderr, "%s ", inet_ntoa(in_addrs[i]));
	break;
	}
	case DNS_PTR:
	/* may get at most one PTR */
	if (count != 1)
	goto out;

	fprintf(stderr, "%s ", (char *)addresses);
	break;
	default:
	goto out;
	}

	dns_ok = type;

	out:
	event_loopexit(NULL);
	}

	static void
	dns_gethostbyname(void)
	{
	fprintf(stdout, "Simple DNS resolve: ");
	dns_ok = 0;
	evdns_resolve_ipv4("www.monkey.org", 0, dns_gethostbyname_cb, NULL);
	event_dispatch();

	if (dns_ok == DNS_IPv4_A) {
	fprintf(stdout, "OK\n");
	} else {
	fprintf(stdout, "FAILED\n");
	exit(1);
	}
	}

	static void
	dns_gethostbyname6(void)
	{
	fprintf(stdout, "IPv6 DNS resolve: ");
	dns_ok = 0;
	evdns_resolve_ipv6("www.ietf.org", 0, dns_gethostbyname_cb, NULL);
	event_dispatch();

	if (dns_ok == DNS_IPv6_AAAA) {
	fprintf(stdout, "OK\n");
	} else if (!dns_ok && dns_err == DNS_ERR_TIMEOUT) {
	fprintf(stdout, "SKIPPED\n");
	} else {
	fprintf(stdout, "FAILED (%d)\n", dns_ok);
	exit(1);
	}
	}

	static void
	dns_gethostbyaddr(void)
	{
	struct in_addr in;
	in.s_addr = htonl(0x7f000001ul); /* 127.0.0.1 */
	fprintf(stdout, "Simple reverse DNS resolve: ");
	dns_ok = 0;
	evdns_resolve_reverse(&in, 0, dns_gethostbyname_cb, NULL);
	event_dispatch();

	if (dns_ok == DNS_PTR) {
	fprintf(stdout, "OK\n");
	} else {
	fprintf(stdout, "FAILED\n");
	exit(1);
	}
	}

	static int n_server_responses = 0;

	static void
	dns_server_request_cb(struct evdns_server_request req, void data)
	{
	int i, r;
	const char TEST_ARPA[] = "11.11.168.192.in-addr.arpa";
	for (i = 0; i < req->nquestions; ++i) {
	struct in_addr ans;
	ans.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
	if (req->questions[i]->type == EVDNS_TYPE_A &&
	req->questions[i]->dns_question_class == EVDNS_CLASS_INET &&
	!strcmp(req->questions[i]->name, "zz.example.com")) {
	r = evdns_server_request_add_a_reply(req, "zz.example.com",
	1, &ans.s_addr, 12345);
	if (r<0)
	dns_ok = 0;
	} else if (req->questions[i]->type == EVDNS_TYPE_AAAA &&
	req->questions[i]->dns_question_class == EVDNS_CLASS_INET &&
	!strcmp(req->questions[i]->name, "zz.example.com")) {
	char addr6[17] = "abcdefghijklmnop";
	r = evdns_server_request_add_aaaa_reply(req, "zz.example.com",
	1, addr6, 123);
	if (r<0)
	dns_ok = 0;
	} else if (req->questions[i]->type == EVDNS_TYPE_PTR &&
	req->questions[i]->dns_question_class == EVDNS_CLASS_INET &&
	!strcmp(req->questions[i]->name, TEST_ARPA)) {
	r = evdns_server_request_add_ptr_reply(req, NULL, TEST_ARPA,
	"ZZ.EXAMPLE.COM", 54321);
	if (r<0)
	dns_ok = 0;
	} else {
	fprintf(stdout, "Unexpected question %d %d \"%s\" ",
	req->questions[i]->type,
	req->questions[i]->dns_question_class,
	req->questions[i]->name);
	dns_ok = 0;
	}
	}
	r = evdns_server_request_respond(req, 0);
	if (r<0) {
	fprintf(stdout, "Couldn't send reply. ");
	dns_ok = 0;
	}
	}

	static void
	dns_server_gethostbyname_cb(int result, char type, int count, int ttl,
	void addresses, void arg)
	{
	if (result != DNS_ERR_NONE) {
	fprintf(stdout, "Unexpected result %d. ", result);
	dns_ok = 0;
	goto out;
	}
	if (count != 1) {
	fprintf(stdout, "Unexpected answer count %d. ", count);
	dns_ok = 0;
	goto out;
	}
	switch (type) {
	case DNS_IPv4_A: {
	struct in_addr *in_addrs = addresses;
	if (in_addrs[0].s_addr != htonl(0xc0a80b0bUL) \|\| ttl != 12345) {
	fprintf(stdout, "Bad IPv4 response \"%s\" %d. ",
	inet_ntoa(in_addrs[0]), ttl);
	dns_ok = 0;
	goto out;
	}
	break;
	}
	case DNS_IPv6_AAAA: {
	#if defined (HAVE_STRUCT_IN6_ADDR) && defined(HAVE_INET_NTOP) && defined(INET6_ADDRSTRLEN)
	struct in6_addr *in6_addrs = addresses;
	char buf[INET6_ADDRSTRLEN+1];
	if (memcmp(&in6_addrs[0].s6_addr, "abcdefghijklmnop", 16)
	\|\| ttl != 123) {
	const char *b = inet_ntop(AF_INET6, &in6_addrs[0],buf,sizeof(buf));
	fprintf(stdout, "Bad IPv6 response \"%s\" %d. ", b, ttl);
	dns_ok = 0;
	goto out;
	}
	#endif
	break;
	}
	case DNS_PTR: {
	char **addrs = addresses;
	if (strcmp(addrs[0], "ZZ.EXAMPLE.COM") \|\| ttl != 54321) {
	fprintf(stdout, "Bad PTR response \"%s\" %d. ",
	addrs[0], ttl);
	dns_ok = 0;
	goto out;
	}
	break;
	}
	default:
	fprintf(stdout, "Bad response type %d. ", type);
	dns_ok = 0;
	}

	out:
	if (++n_server_responses == 3) {
	event_loopexit(NULL);
	}
	}

	static void
	dns_server(void)
	{
	int sock;
	struct sockaddr_in my_addr;
	struct evdns_server_port *port;
	struct in_addr resolve_addr;

	dns_ok = 1;
	fprintf(stdout, "DNS server support: ");

	/* Add ourself as the only nameserver, and make sure we really are
	* the only nameserver. */
	evdns_nameserver_ip_add("127.0.0.1:35353");
	if (evdns_count_nameservers() != 1) {
	fprintf(stdout, "Couldn't set up.\n");
	exit(1);
	}

	/* Now configure a nameserver port. */
	sock = socket(AF_INET, SOCK_DGRAM, 0);
	if (sock == -1) {
	perror("socket");
	exit(1);
	}
	#ifdef WIN32
	{
	u_long nonblocking = 1;
	ioctlsocket(sock, FIONBIO, &nonblocking);
	}
	#else
	fcntl(sock, F_SETFL, O_NONBLOCK);
	#endif
	memset(&my_addr, 0, sizeof(my_addr));
	my_addr.sin_family = AF_INET;
	my_addr.sin_port = htons(35353);
	my_addr.sin_addr.s_addr = htonl(0x7f000001UL);
	if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr)) < 0) {
	perror("bind");
	exit (1);
	}
	port = evdns_add_server_port(sock, 0, dns_server_request_cb, NULL);

	/* Send two queries. */
	evdns_resolve_ipv4("zz.example.com", DNS_QUERY_NO_SEARCH,
	dns_server_gethostbyname_cb, NULL);
	evdns_resolve_ipv6("zz.example.com", DNS_QUERY_NO_SEARCH,
	dns_server_gethostbyname_cb, NULL);
	resolve_addr.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
	evdns_resolve_reverse(&resolve_addr, 0,
	dns_server_gethostbyname_cb, NULL);

	event_dispatch();

	if (dns_ok) {
	fprintf(stdout, "OK\n");
	} else {
	fprintf(stdout, "FAILED\n");
	exit(1);
	}

	evdns_close_server_port(port);
	evdns_shutdown(0); /* remove ourself as nameserver. */
	#ifdef WIN32
	closesocket(sock);
	#else
	close(sock);
	#endif
	}

	void
	dns_suite(void)
	{
	dns_server(); /* Do this before we call evdns_init. */

	evdns_init();
	dns_gethostbyname();
	dns_gethostbyname6();
	dns_gethostbyaddr();

	evdns_shutdown(0);
	}