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/*
* Copyright (c) 2010-2012 Niels Provos and Nick Mathewson
*
* 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.
*/
#include "../util-internal.h"
#ifdef _WIN32
#include <winsock2.h>
#include <windows.h>
#include <ws2tcpip.h>
#endif
#include "event2/event-config.h"
#include <sys/types.h>
#include <sys/stat.h>
#ifdef EVENT__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 EVENT__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 "event2/dns.h"
#include "event2/dns_struct.h"
#include "event2/event.h"
#include "event2/event_compat.h"
#include "event2/util.h"
#include "event2/listener.h"
#include "event2/bufferevent.h"
#include "log-internal.h"
#include "regress.h"
#include "regress_testutils.h"
/* globals */
static struct evdns_server_port *dns_port;
evutil_socket_t dns_sock = -1;
/* Helper: return the port that a socket is bound on, in host order. */
int
regress_get_socket_port(evutil_socket_t fd)
{
struct sockaddr_storage ss;
ev_socklen_t socklen = sizeof(ss);
if (getsockname(fd, (struct sockaddr*)&ss, &socklen) != 0)
return -1;
if (ss.ss_family == AF_INET)
return ntohs( ((struct sockaddr_in*)&ss)->sin_port);
else if (ss.ss_family == AF_INET6)
return ntohs( ((struct sockaddr_in6*)&ss)->sin6_port);
else
return -1;
}
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)
{
struct evdns_server_port *port = NULL;
evutil_socket_t sock;
struct sockaddr_in my_addr;
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
tt_abort_perror("socket");
}
evutil_make_socket_nonblocking(sock);
memset(&my_addr, 0, sizeof(my_addr));
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(*portnum);
my_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr)) < 0) {
evutil_closesocket(sock);
tt_abort_perror("bind");
}
port = evdns_add_server_port_with_base(base, sock, 0, cb, arg);
if (!*portnum)
*portnum = regress_get_socket_port(sock);
if (psock)
*psock = sock;
return port;
end:
return NULL;
}
void
regress_clean_dnsserver(void)
{
if (dns_port) {
evdns_close_server_port(dns_port);
dns_port = NULL;
}
if (dns_sock >= 0) {
evutil_closesocket(dns_sock);
dns_sock = -1;
}
}
static void strtolower(char *s)
{
while (*s) {
*s = EVUTIL_TOLOWER_(*s);
++s;
}
}
void
regress_dns_server_cb(struct evdns_server_request *req, void *data)
{
struct regress_dns_server_table *tab = data;
char *question;
if (req->nquestions != 1)
TT_DIE(("Only handling one question at a time; got %d",
req->nquestions));
question = req->questions[0]->name;
while (tab->q && evutil_ascii_strcasecmp(question, tab->q) &&
strcmp("*", tab->q))
++tab;
if (tab->q == NULL)
TT_DIE(("Unexpected question: '%s'", question));
++tab->seen;
if (tab->lower)
strtolower(question);
if (!strcmp(tab->anstype, "err")) {
int err = atoi(tab->ans);
tt_assert(! evdns_server_request_respond(req, err));
return;
} else if (!strcmp(tab->anstype, "errsoa")) {
int err = atoi(tab->ans);
char soa_record[] =
"\x04" "dns1" "\x05" "icann" "\x03" "org" "\0"
"\x0a" "hostmaster" "\x05" "icann" "\x03" "org" "\0"
"\x77\xde\x5e\xba" /* serial */
"\x00\x00\x1c\x20" /* refreshtime = 2h */
"\x00\x00\x0e\x10" /* retry = 1h */
"\x00\x12\x75\x00" /* expiration = 14d */
"\x00\x00\x0e\x10" /* min.ttl = 1h */
;
evdns_server_request_add_reply(
req, EVDNS_AUTHORITY_SECTION,
"example.com", EVDNS_TYPE_SOA, EVDNS_CLASS_INET,
42, sizeof(soa_record) - 1, 0, soa_record);
tt_assert(! evdns_server_request_respond(req, err));
return;
} else if (!strcmp(tab->anstype, "A")) {
struct in_addr in;
if (!evutil_inet_pton(AF_INET, tab->ans, &in)) {
TT_DIE(("Bad A value %s in table", tab->ans));
}
evdns_server_request_add_a_reply(req, question, 1, &in.s_addr,
100);
} else if (!strcmp(tab->anstype, "AAAA")) {
struct in6_addr in6;
if (!evutil_inet_pton(AF_INET6, tab->ans, &in6)) {
TT_DIE(("Bad AAAA value %s in table", tab->ans));
}
evdns_server_request_add_aaaa_reply(req,
question, 1, &in6.s6_addr, 100);
} else {
TT_DIE(("Weird table entry with type '%s'", tab->anstype));
}
tt_assert(! evdns_server_request_respond(req, 0))
return;
end:
tt_want(! evdns_server_request_drop(req));
}
int
regress_dnsserver(struct event_base *base, ev_uint16_t *port,
struct regress_dns_server_table *search_table)
{
dns_port = regress_get_dnsserver(base, port, &dns_sock,
regress_dns_server_cb, search_table);
return dns_port != NULL;
}
int
regress_get_listener_addr(struct evconnlistener *lev,
struct sockaddr *sa, ev_socklen_t *socklen)
{
evutil_socket_t s = evconnlistener_get_fd(lev);
if (s <= 0)
return -1;
return getsockname(s, sa, socklen);
}