t_pr.c revision 314817
1/* $NetBSD: t_pr.c,v 1.8 2017/01/13 21:30:42 christos Exp $ */ 2 3/*- 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND 17 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 23 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30#include <sys/cdefs.h> 31#ifndef lint 32__RCSID("$NetBSD: t_pr.c,v 1.8 2017/01/13 21:30:42 christos Exp $"); 33#endif /* not lint */ 34 35#include <sys/types.h> 36#include <sys/socket.h> 37#include <sys/sysctl.h> 38 39#include <netinet/in.h> 40#include <net/route.h> 41 42#include <rump/rump.h> 43#include <rump/rump_syscalls.h> 44 45#include <atf-c.h> 46#include <errno.h> 47#include <stdio.h> 48#include <stdlib.h> 49#include <string.h> 50#include <unistd.h> 51 52#include "../config/netconfig.c" 53#include "h_macros.h" 54 55/* 56 * Prepare rump, configure interface and route to cause fragmentation 57 */ 58static void 59setup(void) 60{ 61 char ifname[IFNAMSIZ]; 62 struct { 63 struct rt_msghdr m_rtm; 64 struct sockaddr_in m_sin; 65 } m_rtmsg; 66#define rtm m_rtmsg.m_rtm 67#define rsin m_rtmsg.m_sin 68 struct ifreq ifr; 69 int s; 70 71 rump_init(); 72 73 /* first, config lo0 & route */ 74 strcpy(ifname, "lo0"); 75 netcfg_rump_if(ifname, "127.0.0.1", "255.0.0.0"); 76 netcfg_rump_route("127.0.0.1", "255.0.0.0", "127.0.0.1"); 77 78 if ((s = rump_sys_socket(PF_ROUTE, SOCK_RAW, 0)) == -1) 79 atf_tc_fail_errno("routing socket"); 80 81 /* 82 * set MTU for interface so that route MTU doesn't 83 * get overridden by it. 84 */ 85 memset(&ifr, 0, sizeof(ifr)); 86 strcpy(ifr.ifr_name, "lo0"); 87 ifr.ifr_mtu = 1300; 88 if (rump_sys_ioctl(s, SIOCSIFMTU, &ifr) == -1) 89 atf_tc_fail_errno("set mtu"); 90 91 /* change route MTU to 100 */ 92 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 93 rtm.rtm_type = RTM_CHANGE; 94 rtm.rtm_flags = RTF_STATIC; 95 rtm.rtm_version = RTM_VERSION; 96 rtm.rtm_seq = 3; 97 rtm.rtm_inits = RTV_MTU; 98 rtm.rtm_addrs = RTA_DST; 99 rtm.rtm_rmx.rmx_mtu = 100; 100 rtm.rtm_msglen = sizeof(m_rtmsg); 101 102 memset(&rsin, 0, sizeof(rsin)); 103 rsin.sin_family = AF_INET; 104 rsin.sin_len = sizeof(rsin); 105 rsin.sin_addr.s_addr = inet_addr("127.0.0.1"); 106 107 if (rump_sys_write(s, &m_rtmsg, sizeof(m_rtmsg)) != sizeof(m_rtmsg)) 108 atf_tc_fail_errno("set route mtu"); 109 rump_sys_close(s); 110} 111 112/* 113 * Turn on checksums on loopback interfaces 114 */ 115static int 116enable_locsums(void) 117{ 118 struct sysctlnode q, ans[256]; 119 int mib[5], enable; 120 size_t alen; 121 unsigned i; 122 123 mib[0] = CTL_NET; 124 mib[1] = PF_INET; 125 mib[2] = IPPROTO_IP; 126 mib[3] = CTL_QUERY; 127 alen = sizeof(ans); 128 129 memset(&q, 0, sizeof(q)); 130 q.sysctl_flags = SYSCTL_VERSION; 131 132 if (rump_sys___sysctl(mib, 4, ans, &alen, &q, sizeof(q)) == -1) 133 return -1; 134 135 for (i = 0; i < __arraycount(ans); i++) 136 if (strcmp("do_loopback_cksum", ans[i].sysctl_name) == 0) 137 break; 138 if (i == __arraycount(ans)) { 139 errno = ENOENT; 140 return -1; 141 } 142 143 mib[3] = ans[i].sysctl_num; 144 145 enable = 1; 146 if (rump_sys___sysctl(mib, 4, NULL, NULL, &enable, 147 sizeof(enable)) == -1) 148 return errno; 149 150 return 0; 151} 152 153ATF_TC(loopmtu); 154ATF_TC_HEAD(loopmtu, tc) 155{ 156 157 atf_tc_set_md_var(tc, "descr", 158 "test lo0 fragmentation (PR kern/43664)"); 159} 160 161ATF_TC_BODY(loopmtu, tc) 162{ 163 struct sockaddr_in sin; 164 char data[2000]; 165 int s; 166 167 setup(); 168 169 /* open raw socket */ 170 s = rump_sys_socket(PF_INET, SOCK_RAW, 0); 171 if (s == -1) 172 atf_tc_fail_errno("raw socket"); 173 174 /* then, send data */ 175 memset(&sin, 0, sizeof(sin)); 176 sin.sin_family = AF_INET; 177 sin.sin_len = sizeof(sin); 178 sin.sin_port = htons(12345); 179 sin.sin_addr.s_addr = inet_addr("127.0.0.1"); 180 181 if (rump_sys_sendto(s, data, sizeof(data), 0, 182 (struct sockaddr *)&sin, sizeof(sin)) == -1) 183 atf_tc_fail_errno("sendto failed"); 184} 185 186ATF_TC(loopmtu_csum); 187ATF_TC_HEAD(loopmtu_csum, tc) 188{ 189 190 atf_tc_set_md_var(tc, "descr", 191 "test lo0 fragmentation with checksums (PR kern/43664)"); 192} 193 194ATF_TC_BODY(loopmtu_csum, tc) 195{ 196 struct sockaddr_in sin; 197 char data[2000]; 198 int s; 199 200 setup(); 201 202 ATF_CHECK(enable_locsums() == 0); 203 204 /* open raw socket */ 205 s = rump_sys_socket(PF_INET, SOCK_RAW, 0); 206 if (s == -1) 207 atf_tc_fail_errno("raw socket"); 208 209 /* then, send data */ 210 memset(&sin, 0, sizeof(sin)); 211 sin.sin_family = AF_INET; 212 sin.sin_len = sizeof(sin); 213 sin.sin_port = htons(12345); 214 sin.sin_addr.s_addr = inet_addr("127.0.0.1"); 215 216 if (rump_sys_sendto(s, data, sizeof(data), 0, 217 (struct sockaddr *)&sin, sizeof(sin)) == -1) 218 atf_tc_fail_errno("sendto failed"); 219} 220 221ATF_TP_ADD_TCS(tp) 222{ 223 224 ATF_TP_ADD_TC(tp, loopmtu); 225 ATF_TP_ADD_TC(tp, loopmtu_csum); 226 227 return atf_no_error(); 228} 229 230