michael@0: /*
michael@0:  * Copyright (c) 2010-2012 Niels Provos and Nick Mathewson
michael@0:  *
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  * 1. Redistributions of source code must retain the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer.
michael@0:  * 2. Redistributions in binary form must reproduce the above copyright
michael@0:  *    notice, this list of conditions and the following disclaimer in the
michael@0:  *    documentation and/or other materials provided with the distribution.
michael@0:  * 3. The name of the author may not be used to endorse or promote products
michael@0:  *    derived from this software without specific prior written permission.
michael@0:  *
michael@0:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
michael@0:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
michael@0:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
michael@0:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
michael@0:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
michael@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
michael@0:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
michael@0:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
michael@0:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
michael@0:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0:  */
michael@0: 
michael@0: #ifdef WIN32
michael@0: #include <winsock2.h>
michael@0: #include <windows.h>
michael@0: #include <ws2tcpip.h>
michael@0: #endif
michael@0: 
michael@0: #include "event2/event-config.h"
michael@0: 
michael@0: #include <sys/types.h>
michael@0: #include <sys/stat.h>
michael@0: #ifdef _EVENT_HAVE_SYS_TIME_H
michael@0: #include <sys/time.h>
michael@0: #endif
michael@0: #include <sys/queue.h>
michael@0: #ifndef WIN32
michael@0: #include <sys/socket.h>
michael@0: #include <signal.h>
michael@0: #include <netinet/in.h>
michael@0: #include <arpa/inet.h>
michael@0: #include <unistd.h>
michael@0: #endif
michael@0: #ifdef _EVENT_HAVE_NETINET_IN6_H
michael@0: #include <netinet/in6.h>
michael@0: #endif
michael@0: #ifdef HAVE_NETDB_H
michael@0: #include <netdb.h>
michael@0: #endif
michael@0: #include <fcntl.h>
michael@0: #include <stdlib.h>
michael@0: #include <stdio.h>
michael@0: #include <string.h>
michael@0: #include <errno.h>
michael@0: 
michael@0: #include "event2/dns.h"
michael@0: #include "event2/dns_struct.h"
michael@0: #include "event2/event.h"
michael@0: #include "event2/event_compat.h"
michael@0: #include "event2/util.h"
michael@0: #include "event2/listener.h"
michael@0: #include "event2/bufferevent.h"
michael@0: #include "log-internal.h"
michael@0: #include "regress.h"
michael@0: #include "regress_testutils.h"
michael@0: 
michael@0: #include "../util-internal.h"
michael@0: 
michael@0: /* globals */
michael@0: static struct evdns_server_port *dns_port;
michael@0: evutil_socket_t dns_sock = -1;
michael@0: 
michael@0: /* Helper: return the port that a socket is bound on, in host order. */
michael@0: int
michael@0: regress_get_socket_port(evutil_socket_t fd)
michael@0: {
michael@0: 	struct sockaddr_storage ss;
michael@0: 	ev_socklen_t socklen = sizeof(ss);
michael@0: 	if (getsockname(fd, (struct sockaddr*)&ss, &socklen) != 0)
michael@0: 		return -1;
michael@0: 	if (ss.ss_family == AF_INET)
michael@0: 		return ntohs( ((struct sockaddr_in*)&ss)->sin_port);
michael@0: 	else if (ss.ss_family == AF_INET6)
michael@0: 		return ntohs( ((struct sockaddr_in6*)&ss)->sin6_port);
michael@0: 	else
michael@0: 		return -1;
michael@0: }
michael@0: 
michael@0: struct evdns_server_port *
michael@0: regress_get_dnsserver(struct event_base *base,
michael@0:     ev_uint16_t *portnum,
michael@0:     evutil_socket_t *psock,
michael@0:     evdns_request_callback_fn_type cb,
michael@0:     void *arg)
michael@0: {
michael@0: 	struct evdns_server_port *port = NULL;
michael@0: 	evutil_socket_t sock;
michael@0: 	struct sockaddr_in my_addr;
michael@0: 
michael@0: 	sock = socket(AF_INET, SOCK_DGRAM, 0);
michael@0: 	if (sock < 0) {
michael@0: 		tt_abort_perror("socket");
michael@0: 	}
michael@0: 
michael@0: 	evutil_make_socket_nonblocking(sock);
michael@0: 
michael@0: 	memset(&my_addr, 0, sizeof(my_addr));
michael@0: 	my_addr.sin_family = AF_INET;
michael@0: 	my_addr.sin_port = htons(*portnum);
michael@0: 	my_addr.sin_addr.s_addr = htonl(0x7f000001UL);
michael@0: 	if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr)) < 0) {
michael@0: 		evutil_closesocket(sock);
michael@0: 		tt_abort_perror("bind");
michael@0: 	}
michael@0: 	port = evdns_add_server_port_with_base(base, sock, 0, cb, arg);
michael@0: 	if (!*portnum)
michael@0: 		*portnum = regress_get_socket_port(sock);
michael@0: 	if (psock)
michael@0: 		*psock = sock;
michael@0: 
michael@0: 	return port;
michael@0: end:
michael@0: 	return NULL;
michael@0: }
michael@0: 
michael@0: void
michael@0: regress_clean_dnsserver(void)
michael@0: {
michael@0: 	if (dns_port)
michael@0: 		evdns_close_server_port(dns_port);
michael@0: 	if (dns_sock >= 0)
michael@0: 		evutil_closesocket(dns_sock);
michael@0: }
michael@0: 
michael@0: void
michael@0: regress_dns_server_cb(struct evdns_server_request *req, void *data)
michael@0: {
michael@0: 	struct regress_dns_server_table *tab = data;
michael@0: 	const char *question;
michael@0: 
michael@0: 	if (req->nquestions != 1)
michael@0: 		TT_DIE(("Only handling one question at a time; got %d",
michael@0: 			req->nquestions));
michael@0: 
michael@0: 	question = req->questions[0]->name;
michael@0: 
michael@0: 	while (tab->q && evutil_ascii_strcasecmp(question, tab->q) &&
michael@0: 	    strcmp("*", tab->q))
michael@0: 		++tab;
michael@0: 	if (tab->q == NULL)
michael@0: 		TT_DIE(("Unexpected question: '%s'", question));
michael@0: 
michael@0: 	++tab->seen;
michael@0: 
michael@0: 	if (!strcmp(tab->anstype, "err")) {
michael@0: 		int err = atoi(tab->ans);
michael@0: 		tt_assert(! evdns_server_request_respond(req, err));
michael@0: 		return;
michael@0: 	} else if (!strcmp(tab->anstype, "errsoa")) {
michael@0: 		int err = atoi(tab->ans);
michael@0: 		char soa_record[] =
michael@0: 			"\x04" "dns1" "\x05" "icann" "\x03" "org" "\0"
michael@0: 			"\x0a" "hostmaster" "\x05" "icann" "\x03" "org" "\0"
michael@0: 			"\x77\xde\x5e\xba" /* serial */
michael@0: 			"\x00\x00\x1c\x20" /* refreshtime = 2h */
michael@0: 			"\x00\x00\x0e\x10" /* retry = 1h */
michael@0: 			"\x00\x12\x75\x00" /* expiration = 14d */
michael@0: 			"\x00\x00\x0e\x10" /* min.ttl = 1h */
michael@0: 			;
michael@0: 		evdns_server_request_add_reply(
michael@0: 			req, EVDNS_AUTHORITY_SECTION,
michael@0: 			"example.com", EVDNS_TYPE_SOA, EVDNS_CLASS_INET,
michael@0: 			42, sizeof(soa_record) - 1, 0, soa_record);
michael@0: 		tt_assert(! evdns_server_request_respond(req, err));
michael@0: 		return;
michael@0: 	} else if (!strcmp(tab->anstype, "A")) {
michael@0: 		struct in_addr in;
michael@0: 		if (!evutil_inet_pton(AF_INET, tab->ans, &in)) {
michael@0: 			TT_DIE(("Bad A value %s in table", tab->ans));
michael@0: 		}
michael@0: 		evdns_server_request_add_a_reply(req, question, 1, &in.s_addr,
michael@0: 		    100);
michael@0: 	} else if (!strcmp(tab->anstype, "AAAA")) {
michael@0: 		struct in6_addr in6;
michael@0: 		if (!evutil_inet_pton(AF_INET6, tab->ans, &in6)) {
michael@0: 			TT_DIE(("Bad AAAA value %s in table", tab->ans));
michael@0: 		}
michael@0: 		evdns_server_request_add_aaaa_reply(req,
michael@0: 		    question, 1, &in6.s6_addr, 100);
michael@0: 	} else {
michael@0: 		TT_DIE(("Weird table entry with type '%s'", tab->anstype));
michael@0: 	}
michael@0: 	tt_assert(! evdns_server_request_respond(req, 0))
michael@0: 	return;
michael@0: end:
michael@0: 	tt_want(! evdns_server_request_drop(req));
michael@0: }
michael@0: 
michael@0: int
michael@0: regress_dnsserver(struct event_base *base, ev_uint16_t *port,
michael@0:     struct regress_dns_server_table *search_table)
michael@0: {
michael@0: 	dns_port = regress_get_dnsserver(base, port, &dns_sock,
michael@0: 	    regress_dns_server_cb, search_table);
michael@0: 	return dns_port != NULL;
michael@0: }
michael@0: 
michael@0: int
michael@0: regress_get_listener_addr(struct evconnlistener *lev,
michael@0:     struct sockaddr *sa, ev_socklen_t *socklen)
michael@0: {
michael@0: 	evutil_socket_t s = evconnlistener_get_fd(lev);
michael@0: 	if (s <= 0)
michael@0: 		return -1;
michael@0: 	return getsockname(s, sa, socklen);
michael@0: }