1 /*- 2 * Copyright (c) 2004-2005 Robert N. M. Watson 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 #include <sys/types.h> 30 #include <sys/socket.h> 31 32 #include <netinet/in.h> 33 #include <netinet/tcp.h> 34 35 #include <arpa/inet.h> 36 37 #include <errno.h> 38 #include <fcntl.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 45 static void 46 usage(void) 47 { 48 49 fprintf(stderr, "tcpconnect server port\n"); 50 fprintf(stderr, "tcpconnect client ip port count [nonblock] [tcpmd5]\n"); 51 exit(-1); 52 } 53 54 static void 55 tcpconnect_server(int argc, char *argv[]) 56 { 57 int listen_sock, accept_sock; 58 struct sockaddr_in sin; 59 char *dummy; 60 long port; 61 62 if (argc != 1) 63 usage(); 64 65 bzero(&sin, sizeof(sin)); 66 sin.sin_len = sizeof(sin); 67 sin.sin_family = AF_INET; 68 sin.sin_addr.s_addr = htonl(INADDR_ANY); 69 70 port = strtoul(argv[0], &dummy, 10); 71 if (port < 1 || port > 65535 || *dummy != '\0') 72 usage(); 73 sin.sin_port = htons(port); 74 75 listen_sock = socket(PF_INET, SOCK_STREAM, 0); 76 if (listen_sock == -1) 77 err(-1, "socket"); 78 79 if (bind(listen_sock, (struct sockaddr *)&sin, sizeof(sin)) == -1) 80 err(-1, "bind"); 81 82 if (listen(listen_sock, -1) == -1) 83 err(-1, "listen"); 84 85 while (1) { 86 accept_sock = accept(listen_sock, NULL, NULL); 87 close(accept_sock); 88 } 89 } 90 91 static void 92 tcpconnect_client(int argc, char *argv[]) 93 { 94 struct sockaddr_in sin; 95 long count, i, port; 96 char *dummy; 97 int sock; 98 int nonblock = 0, md5enable = 0; 99 100 if (argc < 3 || argc > 5) 101 usage(); 102 for (i=3; i < argc; i++) { 103 if (strcmp(argv[i], "nonblock") == 0) 104 nonblock = 1; 105 if (strcmp(argv[i], "tcpmd5") == 0) 106 md5enable = 1; 107 } 108 109 bzero(&sin, sizeof(sin)); 110 sin.sin_len = sizeof(sin); 111 sin.sin_family = AF_INET; 112 if (inet_aton(argv[0], &sin.sin_addr) == 0) 113 err(-1, "listen"); 114 115 port = strtoul(argv[1], &dummy, 10); 116 if (port < 1 || port > 65535 || *dummy != '\0') 117 usage(); 118 sin.sin_port = htons(port); 119 120 count = strtoul(argv[2], &dummy, 10); 121 if (count < 1 || count > 100000 || *dummy != '\0') 122 usage(); 123 124 for (i = 0; i < count; i++) { 125 sock = socket(PF_INET, SOCK_STREAM, 0); 126 if (sock == -1) 127 err(-1, "socket"); 128 129 /* No warning in default case on ENOPROTOOPT. */ 130 if (setsockopt(sock, IPPROTO_TCP, TCP_MD5SIG, 131 &md5enable, sizeof(md5enable)) != 0) { 132 if (errno == ENOPROTOOPT && md5enable > 0) 133 err(-1, "setsockopt(TCP_MD5SIG)"); 134 else if (errno != ENOPROTOOPT) 135 warn("setsockopt(TCP_MD5SIG)"); 136 } 137 138 if (nonblock) { 139 if (fcntl(sock, F_SETFL, O_NONBLOCK) != 0) 140 err(-1, "fcntl(F_SETFL)"); 141 142 if (connect(sock, (struct sockaddr *)&sin, 143 sizeof(sin)) == -1 && errno != EINPROGRESS) 144 err(-1, "connect"); 145 } else { 146 if (connect(sock, (struct sockaddr *)&sin, 147 sizeof(sin)) == -1) 148 err(-1, "connect"); 149 } 150 151 close(sock); 152 } 153 } 154 155 int 156 main(int argc, char *argv[]) 157 { 158 159 if (argc < 2) 160 usage(); 161 162 if (strcmp(argv[1], "server") == 0) 163 tcpconnect_server(argc - 2, argv + 2); 164 else if (strcmp(argv[1], "client") == 0) 165 tcpconnect_client(argc - 2, argv + 2); 166 else 167 usage(); 168 169 exit(0); 170 } 171