/* $NetBSD: t_pr.c,v 1.8 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_pr.c,v 1.8 2017/01/13 21:30:42 christos Exp $");
#endif /* not lint */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <netinet/in.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 "../config/netconfig.c"
#include "h_macros.h"
/*
* Prepare rump, configure interface and route to cause fragmentation
*/
static void
setup(void)
{
char ifname[IFNAMSIZ];
struct {
struct rt_msghdr m_rtm;
struct sockaddr_in m_sin;
} m_rtmsg;
#define rtm m_rtmsg.m_rtm
#define rsin m_rtmsg.m_sin
struct ifreq ifr;
int s;
rump_init();
/* first, config lo0 & route */
strcpy(ifname, "lo0");
netcfg_rump_if(ifname, "127.0.0.1", "255.0.0.0");
netcfg_rump_route("127.0.0.1", "255.0.0.0", "127.0.0.1");
if ((s = rump_sys_socket(PF_ROUTE, SOCK_RAW, 0)) == -1)
atf_tc_fail_errno("routing socket");
/*
* set MTU for interface so that route MTU doesn't
* get overridden by it.
*/
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, "lo0");
ifr.ifr_mtu = 1300;
if (rump_sys_ioctl(s, SIOCSIFMTU, &ifr) == -1)
atf_tc_fail_errno("set mtu");
/* change route MTU to 100 */
memset(&m_rtmsg, 0, sizeof(m_rtmsg));
rtm.rtm_type = RTM_CHANGE;
rtm.rtm_flags = RTF_STATIC;
rtm.rtm_version = RTM_VERSION;
rtm.rtm_seq = 3;
rtm.rtm_inits = RTV_MTU;
rtm.rtm_addrs = RTA_DST;
rtm.rtm_rmx.rmx_mtu = 100;
rtm.rtm_msglen = sizeof(m_rtmsg);
memset(&rsin, 0, sizeof(rsin));
rsin.sin_family = AF_INET;
rsin.sin_len = sizeof(rsin);
rsin.sin_addr.s_addr = inet_addr("127.0.0.1");
if (rump_sys_write(s, &m_rtmsg, sizeof(m_rtmsg)) != sizeof(m_rtmsg))
atf_tc_fail_errno("set route mtu");
rump_sys_close(s);
}
/*
* Turn on checksums on loopback interfaces
*/
static int
enable_locsums(void)
{
struct sysctlnode q, ans[256];
int mib[5], enable;
size_t alen;
unsigned i;
mib[0] = CTL_NET;
mib[1] = PF_INET;
mib[2] = IPPROTO_IP;
mib[3] = CTL_QUERY;
alen = sizeof(ans);
memset(&q, 0, sizeof(q));
q.sysctl_flags = SYSCTL_VERSION;
if (rump_sys___sysctl(mib, 4, ans, &alen, &q, sizeof(q)) == -1)
return -1;
for (i = 0; i < __arraycount(ans); i++)
if (strcmp("do_loopback_cksum", ans[i].sysctl_name) == 0)
break;
if (i == __arraycount(ans)) {
errno = ENOENT;
return -1;
}
mib[3] = ans[i].sysctl_num;
enable = 1;
if (rump_sys___sysctl(mib, 4, NULL, NULL, &enable,
sizeof(enable)) == -1)
return errno;
return 0;
}
ATF_TC(loopmtu);
ATF_TC_HEAD(loopmtu, tc)
{
atf_tc_set_md_var(tc, "descr",
"test lo0 fragmentation (PR kern/43664)");
}
ATF_TC_BODY(loopmtu, tc)
{
struct sockaddr_in sin;
char data[2000];
int s;
setup();
/* open raw socket */
s = rump_sys_socket(PF_INET, SOCK_RAW, 0);
if (s == -1)
atf_tc_fail_errno("raw socket");
/* then, send data */
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_len = sizeof(sin);
sin.sin_port = htons(12345);
sin.sin_addr.s_addr = inet_addr("127.0.0.1");
if (rump_sys_sendto(s, data, sizeof(data), 0,
(struct sockaddr *)&sin, sizeof(sin)) == -1)
atf_tc_fail_errno("sendto failed");
}
ATF_TC(loopmtu_csum);
ATF_TC_HEAD(loopmtu_csum, tc)
{
atf_tc_set_md_var(tc, "descr",
"test lo0 fragmentation with checksums (PR kern/43664)");
}
ATF_TC_BODY(loopmtu_csum, tc)
{
struct sockaddr_in sin;
char data[2000];
int s;
setup();
ATF_CHECK(enable_locsums() == 0);
/* open raw socket */
s = rump_sys_socket(PF_INET, SOCK_RAW, 0);
if (s == -1)
atf_tc_fail_errno("raw socket");
/* then, send data */
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_len = sizeof(sin);
sin.sin_port = htons(12345);
sin.sin_addr.s_addr = inet_addr("127.0.0.1");
if (rump_sys_sendto(s, data, sizeof(data), 0,
(struct sockaddr *)&sin, sizeof(sin)) == -1)
atf_tc_fail_errno("sendto failed");
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, loopmtu);
ATF_TP_ADD_TC(tp, loopmtu_csum);
return atf_no_error();
}
