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 * $FreeBSD$ 27 */ 28 29 /* 30 * Bug in IP code panics the system at close(2) on 31 * connected SOCK_RAW, IPPROTO_IP socket. 32 */ 33 34 #include <sys/types.h> 35 #include <sys/socket.h> 36 #include <netinet/in.h> 37 38 #include <err.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <strings.h> 42 #include <unistd.h> 43 44 static void 45 usage(void) 46 { 47 48 fprintf(stderr, "rawconnect: no arguments\n"); 49 exit(1); 50 } 51 52 int 53 main(int argc, __unused char *argv[]) 54 { 55 struct sockaddr_in sin; 56 int sock; 57 58 if (argc != 1) 59 usage(); 60 61 bzero(&sin, sizeof(sin)); 62 sin.sin_len = sizeof(sin); 63 sin.sin_family = AF_INET; 64 sin.sin_addr.s_addr = INADDR_LOOPBACK; 65 sin.sin_port = htons(65534); 66 67 sock = socket(PF_INET, SOCK_RAW, IPPROTO_IP); 68 if (sock == -1) 69 err(1, "socket"); 70 71 if (connect(sock, (struct sockaddr *)&sin, sizeof(sin)) == -1) 72 err(1, "connect"); 73 74 close(sock); 75 76 return (0); 77 } 78