/* $NetBSD: t_forward.c,v 1.10 2017/01/13 21:30:42 christos Exp $ */

/* $NetBSD: t_forward.c,v 1.10 2017/01/13 21:30:42 christos Exp $ */

/*-
* Copyright (c) 2010 The NetBSD Foundation, Inc.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
* CONTRIBUTORS ``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 FOUNDATION OR CONTRIBUTORS 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 <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: t_forward.c,v 1.10 2017/01/13 21:30:42 christos Exp $");
#endif /* not lint */

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/sysctl.h>
#include <sys/wait.h>

#include <arpa/inet.h>

#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netinet/icmp_var.h>
#include <net/route.h>

#include <rump/rump.h>
#include <rump/rump_syscalls.h>

#include <atf-c.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "h_macros.h"
#include "../config/netconfig.c"

/*
* Since our maxttl is in our private namespace, we don't need raw packet
* construction like traceroute(8) -- we can just use the global maxttl.
*/
static void
sendttl(void)
{
struct sockaddr_in sin;
char payload[1024];
char ifname[IFNAMSIZ];
int mib[4] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_DEFTTL };
int nv;
int s;

netcfg_rump_makeshmif("bus1", ifname);
netcfg_rump_if(ifname, "1.0.0.1", "255.255.255.0");
netcfg_rump_route("0.0.0.0", "0.0.0.0", "1.0.0.2"); /* default router */

/* set global ttl to 1 */
nv = 1;
if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1)
atf_tc_fail_errno("set ttl");

s = rump_sys_socket(PF_INET, SOCK_DGRAM, 0);
if (s == -1)
atf_tc_fail_errno("create send socket");

memset(&sin, 0, sizeof(sin));
sin.sin_len = sizeof(sin);
sin.sin_family = AF_INET;
sin.sin_port = htons(33434);
sin.sin_addr.s_addr = inet_addr("9.9.9.9");

/* send udp datagram with ttl == 1 */
if (rump_sys_sendto(s, payload, sizeof(payload), 0,
(struct sockaddr *)&sin, sizeof(sin)) == -1)
atf_tc_fail_errno("sendto");
}

static void
router(void)
{
int mib[4] = { CTL_NET, PF_INET, IPPROTO_ICMP,
ICMPCTL_RETURNDATABYTES };
char ifname[IFNAMSIZ];
int nv;

/* set returndatabytes to 200 */
nv = 200;
if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1)
atf_tc_fail_errno("sysctl returndatabytes");

netcfg_rump_makeshmif("bus1", ifname);
netcfg_rump_if(ifname, "1.0.0.2", "255.255.255.0");

/*
* Wait for parent to send us the data and for us to have
* a chance to process it.
*/
sleep(1);
exit(0);
}

ATF_TC(returndatabytes);
ATF_TC_HEAD(returndatabytes, tc)
{

atf_tc_set_md_var(tc, "descr", "icmp.returndatabytes with certain "
"packets can cause kernel panic (PR kern/43548)");
atf_tc_set_md_var(tc, "timeout", "20"); /* just in case */
}

ATF_TC_BODY(returndatabytes, tc)
{
pid_t cpid;
int status;

cpid = fork();
rump_init();

switch (cpid) {
case -1:
atf_tc_fail_errno("fork failed");
case 0:
router();
break;
default:
sendttl();
if (wait(&status) == -1)
atf_tc_fail_errno("wait");
if (WIFEXITED(status)) {
if (WEXITSTATUS(status))
atf_tc_fail("child exited with status %d",
WEXITSTATUS(status));
} else {
atf_tc_fail("child died");
}
}
}

ATF_TP_ADD_TCS(tp)
{

ATF_TP_ADD_TC(tp, returndatabytes);

return atf_no_error();
}