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t_pr.c
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Editing: t_pr.c
/* $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(); }
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