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t_forward.c revision 1.5 
      1 /*	$NetBSD: t_forward.c,v 1.5 2010/07/26 14:10:31 pooka 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_forward.c,v 1.5 2010/07/26 14:10:31 pooka Exp $");
     33 #endif /* not lint */
     34 
     35 #include <sys/types.h>
     36 #include <sys/socket.h>
     37 #include <sys/time.h>
     38 #include <sys/sysctl.h>
     39 #include <sys/wait.h>
     40 
     41 #include <arpa/inet.h>
     42 
     43 #include <netinet/in.h>
     44 #include <netinet/in_systm.h>
     45 #include <netinet/ip.h>
     46 #include <netinet/ip_icmp.h>
     47 #include <netinet/icmp_var.h>
     48 #include <net/route.h>
     49 
     50 #include <rump/rump.h>
     51 #include <rump/rump_syscalls.h>
     52 
     53 #include <atf-c.h>
     54 #include <errno.h>
     55 #include <stdio.h>
     56 #include <stdlib.h>
     57 #include <string.h>
     58 #include <unistd.h>
     59 
     60 #include "../../h_macros.h"
     61 #include "../config/netconfig.c"
     62 
     63 /*
     64  * Since our maxttl is in our private namespace, we don't need raw packet
     65  * construction like traceroute(8) -- we can just use the global maxttl.
     66  */
     67 static void
     68 sendttl(void)
     69 {
     70 	extern int rumpns_ip_defttl;
     71 	struct sockaddr_in sin;
     72 	char payload[1024];
     73 	char ifname[IFNAMSIZ];
     74 	int mib[4] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_DEFTTL };
     75 	int nv;
     76 	int s;
     77 
     78 	netcfg_rump_makeshmif("bus1", ifname);
     79 	netcfg_rump_if(ifname, "1.0.0.1", "255.255.255.0");
     80 	netcfg_rump_route("0.0.0.0", "0.0.0.0", "1.0.0.2"); /* default router */
     81 
     82 	/* set global ttl to 1 */
     83 	nv = 1;
     84 	if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1)
     85 		atf_tc_fail_errno("set ttl");
     86 
     87 	s = rump_sys_socket(PF_INET, SOCK_DGRAM, 0);
     88 	if (s == -1)
     89 		atf_tc_fail_errno("create send socket");
     90 
     91 	memset(&sin, 0, sizeof(sin));
     92 	sin.sin_len = sizeof(sin);
     93 	sin.sin_family = AF_INET;
     94 	sin.sin_port = htons(33434);
     95 	sin.sin_addr.s_addr = inet_addr("9.9.9.9");
     96 
     97 	/* send udp datagram with ttl == 1 */
     98 	if (rump_sys_sendto(s, payload, sizeof(payload), 0,
     99 	    (struct sockaddr *)&sin, sizeof(sin)) == -1)
    100 		atf_tc_fail_errno("sendto");
    101 }
    102 
    103 static void
    104 router(void)
    105 {
    106 	int mib[4] = { CTL_NET, PF_INET, IPPROTO_ICMP,
    107 		    ICMPCTL_RETURNDATABYTES };
    108 	char ifname[IFNAMSIZ];
    109 	int nv;
    110 
    111 	/* set returndatabytes to 200 */
    112 	nv = 200;
    113 	if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1)
    114 		atf_tc_fail_errno("sysctl returndatabytes");
    115 
    116 	netcfg_rump_makeshmif("bus1", ifname);
    117 	netcfg_rump_if(ifname, "1.0.0.2", "255.255.255.0");
    118 
    119 	/*
    120 	 * Wait for parent to send us the data and for us to have
    121 	 * a chance to process it.
    122 	 */
    123 	sleep(1);
    124 	exit(0);
    125 }
    126 
    127 ATF_TC(returndatabytes);
    128 ATF_TC_HEAD(returndatabytes, tc)
    129 {
    130 
    131 	atf_tc_set_md_var(tc, "descr", "icmp.returndatabytes with certain "
    132 	    "packets can cause kernel panic");
    133 	atf_tc_set_md_var(tc, "use.fs", "true");
    134 	atf_tc_set_md_var(tc, "timeout", "4"); /* just in case */
    135 	/* PR kern/43548 */
    136 }
    137 
    138 ATF_TC_BODY(returndatabytes, tc)
    139 {
    140 	pid_t cpid;
    141 	int status;
    142 
    143 	cpid = fork();
    144 	rump_init();
    145 
    146 	switch (cpid) {
    147 	case -1:
    148 		atf_tc_fail_errno("fork failed");
    149 	case 0:
    150 		router();
    151 		break;
    152 	default:
    153 		sendttl();
    154 		if (wait(&status) == -1)
    155 			atf_tc_fail_errno("wait");
    156 		if (WIFEXITED(status)) {
    157 			if (WEXITSTATUS(status))
    158 				atf_tc_fail("child exited with status %d",
    159 				    WEXITSTATUS(status));
    160 		} else {
    161 			atf_tc_fail("child died");
    162 		}
    163 	}
    164 }
    165 
    166 ATF_TP_ADD_TCS(tp)
    167 {
    168 
    169 	ATF_TP_ADD_TC(tp, returndatabytes);
    170 
    171 	return atf_no_error();
    172 }
    173