1 /*-
2 * Copyright (c) 2006 Maxim Konovalov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 /*
28 * Bug in IP code panics the system at close(2) on
29 * connected SOCK_RAW, IPPROTO_IP socket.
30 */
31
32 #include <sys/types.h>
33 #include <sys/socket.h>
34 #include <netinet/in.h>
35
36 #include <err.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <strings.h>
40 #include <unistd.h>
41
42 static void
usage(void)43 usage(void)
44 {
45
46 fprintf(stderr, "rawconnect: no arguments\n");
47 exit(1);
48 }
49
50 int
main(int argc,__unused char * argv[])51 main(int argc, __unused char *argv[])
52 {
53 struct sockaddr_in sin;
54 int sock;
55
56 if (argc != 1)
57 usage();
58
59 bzero(&sin, sizeof(sin));
60 sin.sin_len = sizeof(sin);
61 sin.sin_family = AF_INET;
62 sin.sin_addr.s_addr = INADDR_LOOPBACK;
63 sin.sin_port = htons(65534);
64
65 sock = socket(PF_INET, SOCK_RAW, IPPROTO_IP);
66 if (sock == -1)
67 err(1, "socket");
68
69 if (connect(sock, (struct sockaddr *)&sin, sizeof(sin)) == -1)
70 err(1, "connect");
71
72 close(sock);
73
74 return (0);
75 }
76