1 /* $NetBSD: t_forward.c,v 1.10 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_forward.c,v 1.10 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/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
sendttl(void)68 sendttl(void)
69 {
70 struct sockaddr_in sin;
71 char payload[1024];
72 char ifname[IFNAMSIZ];
73 int mib[4] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_DEFTTL };
74 int nv;
75 int s;
76
77 netcfg_rump_makeshmif("bus1", ifname);
78 netcfg_rump_if(ifname, "1.0.0.1", "255.255.255.0");
79 netcfg_rump_route("0.0.0.0", "0.0.0.0", "1.0.0.2"); /* default router */
80
81 /* set global ttl to 1 */
82 nv = 1;
83 if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1)
84 atf_tc_fail_errno("set ttl");
85
86 s = rump_sys_socket(PF_INET, SOCK_DGRAM, 0);
87 if (s == -1)
88 atf_tc_fail_errno("create send socket");
89
90 memset(&sin, 0, sizeof(sin));
91 sin.sin_len = sizeof(sin);
92 sin.sin_family = AF_INET;
93 sin.sin_port = htons(33434);
94 sin.sin_addr.s_addr = inet_addr("9.9.9.9");
95
96 /* send udp datagram with ttl == 1 */
97 if (rump_sys_sendto(s, payload, sizeof(payload), 0,
98 (struct sockaddr *)&sin, sizeof(sin)) == -1)
99 atf_tc_fail_errno("sendto");
100 }
101
102 static void
router(void)103 router(void)
104 {
105 int mib[4] = { CTL_NET, PF_INET, IPPROTO_ICMP,
106 ICMPCTL_RETURNDATABYTES };
107 char ifname[IFNAMSIZ];
108 int nv;
109
110 /* set returndatabytes to 200 */
111 nv = 200;
112 if (rump_sys___sysctl(mib, 4, NULL, NULL, &nv, sizeof(nv)) == -1)
113 atf_tc_fail_errno("sysctl returndatabytes");
114
115 netcfg_rump_makeshmif("bus1", ifname);
116 netcfg_rump_if(ifname, "1.0.0.2", "255.255.255.0");
117
118 /*
119 * Wait for parent to send us the data and for us to have
120 * a chance to process it.
121 */
122 sleep(1);
123 exit(0);
124 }
125
126 ATF_TC(returndatabytes);
ATF_TC_HEAD(returndatabytes,tc)127 ATF_TC_HEAD(returndatabytes, tc)
128 {
129
130 atf_tc_set_md_var(tc, "descr", "icmp.returndatabytes with certain "
131 "packets can cause kernel panic (PR kern/43548)");
132 atf_tc_set_md_var(tc, "timeout", "20"); /* just in case */
133 }
134
ATF_TC_BODY(returndatabytes,tc)135 ATF_TC_BODY(returndatabytes, tc)
136 {
137 pid_t cpid;
138 int status;
139
140 cpid = fork();
141 rump_init();
142
143 switch (cpid) {
144 case -1:
145 atf_tc_fail_errno("fork failed");
146 case 0:
147 router();
148 break;
149 default:
150 sendttl();
151 if (wait(&status) == -1)
152 atf_tc_fail_errno("wait");
153 if (WIFEXITED(status)) {
154 if (WEXITSTATUS(status))
155 atf_tc_fail("child exited with status %d",
156 WEXITSTATUS(status));
157 } else {
158 atf_tc_fail("child died");
159 }
160 }
161 }
162
ATF_TP_ADD_TCS(tp)163 ATF_TP_ADD_TCS(tp)
164 {
165
166 ATF_TP_ADD_TC(tp, returndatabytes);
167
168 return atf_no_error();
169 }
170