/*
* Copyright (c) 2003-2006 Niels Provos <[email protected]>
* 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);
}
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