230 lines
5.4 KiB
C
230 lines
5.4 KiB
C
/* $NetBSD: t_pr.c,v 1.8 2017/01/13 21:30:42 christos Exp $ */
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/*-
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* Copyright (c) 2010 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
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* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: t_pr.c,v 1.8 2017/01/13 21:30:42 christos Exp $");
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <netinet/in.h>
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#include <net/route.h>
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#include <rump/rump.h>
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#include <rump/rump_syscalls.h>
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#include <atf-c.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "../config/netconfig.c"
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#include "h_macros.h"
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/*
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* Prepare rump, configure interface and route to cause fragmentation
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*/
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static void
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setup(void)
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{
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char ifname[IFNAMSIZ];
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struct {
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struct rt_msghdr m_rtm;
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struct sockaddr_in m_sin;
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} m_rtmsg;
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#define rtm m_rtmsg.m_rtm
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#define rsin m_rtmsg.m_sin
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struct ifreq ifr;
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int s;
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rump_init();
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/* first, config lo0 & route */
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strcpy(ifname, "lo0");
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netcfg_rump_if(ifname, "127.0.0.1", "255.0.0.0");
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netcfg_rump_route("127.0.0.1", "255.0.0.0", "127.0.0.1");
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if ((s = rump_sys_socket(PF_ROUTE, SOCK_RAW, 0)) == -1)
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atf_tc_fail_errno("routing socket");
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/*
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* set MTU for interface so that route MTU doesn't
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* get overridden by it.
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*/
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memset(&ifr, 0, sizeof(ifr));
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strcpy(ifr.ifr_name, "lo0");
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ifr.ifr_mtu = 1300;
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if (rump_sys_ioctl(s, SIOCSIFMTU, &ifr) == -1)
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atf_tc_fail_errno("set mtu");
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/* change route MTU to 100 */
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memset(&m_rtmsg, 0, sizeof(m_rtmsg));
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rtm.rtm_type = RTM_CHANGE;
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rtm.rtm_flags = RTF_STATIC;
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rtm.rtm_version = RTM_VERSION;
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rtm.rtm_seq = 3;
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rtm.rtm_inits = RTV_MTU;
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rtm.rtm_addrs = RTA_DST;
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rtm.rtm_rmx.rmx_mtu = 100;
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rtm.rtm_msglen = sizeof(m_rtmsg);
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memset(&rsin, 0, sizeof(rsin));
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rsin.sin_family = AF_INET;
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rsin.sin_len = sizeof(rsin);
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rsin.sin_addr.s_addr = inet_addr("127.0.0.1");
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if (rump_sys_write(s, &m_rtmsg, sizeof(m_rtmsg)) != sizeof(m_rtmsg))
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atf_tc_fail_errno("set route mtu");
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rump_sys_close(s);
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}
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/*
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* Turn on checksums on loopback interfaces
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*/
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static int
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enable_locsums(void)
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{
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struct sysctlnode q, ans[256];
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int mib[5], enable;
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size_t alen;
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unsigned i;
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mib[0] = CTL_NET;
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mib[1] = PF_INET;
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mib[2] = IPPROTO_IP;
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mib[3] = CTL_QUERY;
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alen = sizeof(ans);
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memset(&q, 0, sizeof(q));
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q.sysctl_flags = SYSCTL_VERSION;
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if (rump_sys___sysctl(mib, 4, ans, &alen, &q, sizeof(q)) == -1)
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return -1;
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for (i = 0; i < __arraycount(ans); i++)
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if (strcmp("do_loopback_cksum", ans[i].sysctl_name) == 0)
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break;
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if (i == __arraycount(ans)) {
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errno = ENOENT;
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return -1;
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}
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mib[3] = ans[i].sysctl_num;
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enable = 1;
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if (rump_sys___sysctl(mib, 4, NULL, NULL, &enable,
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sizeof(enable)) == -1)
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return errno;
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return 0;
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}
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ATF_TC(loopmtu);
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ATF_TC_HEAD(loopmtu, tc)
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{
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atf_tc_set_md_var(tc, "descr",
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"test lo0 fragmentation (PR kern/43664)");
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}
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ATF_TC_BODY(loopmtu, tc)
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{
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struct sockaddr_in sin;
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char data[2000];
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int s;
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setup();
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/* open raw socket */
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s = rump_sys_socket(PF_INET, SOCK_RAW, 0);
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if (s == -1)
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atf_tc_fail_errno("raw socket");
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/* then, send data */
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memset(&sin, 0, sizeof(sin));
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sin.sin_family = AF_INET;
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sin.sin_len = sizeof(sin);
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sin.sin_port = htons(12345);
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sin.sin_addr.s_addr = inet_addr("127.0.0.1");
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if (rump_sys_sendto(s, data, sizeof(data), 0,
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(struct sockaddr *)&sin, sizeof(sin)) == -1)
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atf_tc_fail_errno("sendto failed");
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}
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ATF_TC(loopmtu_csum);
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ATF_TC_HEAD(loopmtu_csum, tc)
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{
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atf_tc_set_md_var(tc, "descr",
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"test lo0 fragmentation with checksums (PR kern/43664)");
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}
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ATF_TC_BODY(loopmtu_csum, tc)
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{
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struct sockaddr_in sin;
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char data[2000];
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int s;
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setup();
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ATF_CHECK(enable_locsums() == 0);
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/* open raw socket */
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s = rump_sys_socket(PF_INET, SOCK_RAW, 0);
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if (s == -1)
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atf_tc_fail_errno("raw socket");
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/* then, send data */
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memset(&sin, 0, sizeof(sin));
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sin.sin_family = AF_INET;
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sin.sin_len = sizeof(sin);
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sin.sin_port = htons(12345);
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sin.sin_addr.s_addr = inet_addr("127.0.0.1");
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if (rump_sys_sendto(s, data, sizeof(data), 0,
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(struct sockaddr *)&sin, sizeof(sin)) == -1)
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atf_tc_fail_errno("sendto failed");
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, loopmtu);
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ATF_TP_ADD_TC(tp, loopmtu_csum);
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return atf_no_error();
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}
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