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 <err.h> 38 #include <errno.h> 39 #include <fcntl.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 46 static void 47 usage(void) 48 { 49 50 fprintf(stderr, "tcpconnect server port\n"); 51 fprintf(stderr, "tcpconnect client ip port count [nonblock] [tcpmd5]\n"); 52 exit(-1); 53 } 54 55 static void 56 tcpconnect_server(int argc, char *argv[]) 57 { 58 int listen_sock, accept_sock; 59 struct sockaddr_in sin; 60 char *dummy; 61 long port; 62 63 if (argc != 1) 64 usage(); 65 66 bzero(&sin, sizeof(sin)); 67 sin.sin_len = sizeof(sin); 68 sin.sin_family = AF_INET; 69 sin.sin_addr.s_addr = htonl(INADDR_ANY); 70 71 port = strtoul(argv[0], &dummy, 10); 72 if (port < 1 || port > 65535 || *dummy != '\0') 73 usage(); 74 sin.sin_port = htons(port); 75 76 listen_sock = socket(PF_INET, SOCK_STREAM, 0); 77 if (listen_sock == -1) 78 err(-1, "socket"); 79 80 if (bind(listen_sock, (struct sockaddr *)&sin, sizeof(sin)) == -1) 81 err(-1, "bind"); 82 83 if (listen(listen_sock, -1) == -1) 84 err(-1, "listen"); 85 86 while (1) { 87 accept_sock = accept(listen_sock, NULL, NULL); 88 close(accept_sock); 89 } 90 } 91 92 static void 93 tcpconnect_client(int argc, char *argv[]) 94 { 95 struct sockaddr_in sin; 96 long count, i, port; 97 char *dummy; 98 int sock; 99 int nonblock = 0, md5enable = 0; 100 101 if (argc < 3 || argc > 5) 102 usage(); 103 for (i=3; i < argc; i++) { 104 if (strcmp(argv[i], "nonblock") == 0) 105 nonblock = 1; 106 if (strcmp(argv[i], "tcpmd5") == 0) 107 md5enable = 1; 108 } 109 110 bzero(&sin, sizeof(sin)); 111 sin.sin_len = sizeof(sin); 112 sin.sin_family = AF_INET; 113 if (inet_aton(argv[0], &sin.sin_addr) == 0) 114 err(-1, "listen"); 115 116 port = strtoul(argv[1], &dummy, 10); 117 if (port < 1 || port > 65535 || *dummy != '\0') 118 usage(); 119 sin.sin_port = htons(port); 120 121 count = strtoul(argv[2], &dummy, 10); 122 if (count < 1 || count > 100000 || *dummy != '\0') 123 usage(); 124 125 for (i = 0; i < count; i++) { 126 sock = socket(PF_INET, SOCK_STREAM, 0); 127 if (sock == -1) 128 err(-1, "socket"); 129 130 /* No warning in default case on ENOPROTOOPT. */ 131 if (setsockopt(sock, IPPROTO_TCP, TCP_MD5SIG, 132 &md5enable, sizeof(md5enable)) != 0) { 133 if (errno == ENOPROTOOPT && md5enable > 0) 134 err(-1, "setsockopt(TCP_MD5SIG)"); 135 else if (errno != ENOPROTOOPT) 136 warn("setsockopt(TCP_MD5SIG)"); 137 } 138 139 if (nonblock) { 140 if (fcntl(sock, F_SETFL, O_NONBLOCK) != 0) 141 err(-1, "fcntl(F_SETFL)"); 142 143 if (connect(sock, (struct sockaddr *)&sin, 144 sizeof(sin)) == -1 && errno != EINPROGRESS) 145 err(-1, "connect"); 146 } else { 147 if (connect(sock, (struct sockaddr *)&sin, 148 sizeof(sin)) == -1) 149 err(-1, "connect"); 150 } 151 152 close(sock); 153 } 154 } 155 156 int 157 main(int argc, char *argv[]) 158 { 159 160 if (argc < 2) 161 usage(); 162 163 if (strcmp(argv[1], "server") == 0) 164 tcpconnect_server(argc - 2, argv + 2); 165 else if (strcmp(argv[1], "client") == 0) 166 tcpconnect_client(argc - 2, argv + 2); 167 else 168 usage(); 169 170 exit(0); 171 } 172