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 27 #include <sys/types.h> 28 #include <sys/socket.h> 29 30 #include <netinet/in.h> 31 #include <netinet/tcp.h> 32 33 #include <arpa/inet.h> 34 35 #include <err.h> 36 #include <errno.h> 37 #include <fcntl.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 43 44 static void 45 usage(void) 46 { 47 48 fprintf(stderr, "tcpconnect server port\n"); 49 fprintf(stderr, "tcpconnect client ip port count [nonblock] [tcpmd5]\n"); 50 exit(-1); 51 } 52 53 static void 54 tcpconnect_server(int argc, char *argv[]) 55 { 56 int listen_sock, accept_sock; 57 struct sockaddr_in sin; 58 char *dummy; 59 long port; 60 61 if (argc != 1) 62 usage(); 63 64 bzero(&sin, sizeof(sin)); 65 sin.sin_len = sizeof(sin); 66 sin.sin_family = AF_INET; 67 sin.sin_addr.s_addr = htonl(INADDR_ANY); 68 69 port = strtoul(argv[0], &dummy, 10); 70 if (port < 1 || port > 65535 || *dummy != '\0') 71 usage(); 72 sin.sin_port = htons(port); 73 74 listen_sock = socket(PF_INET, SOCK_STREAM, 0); 75 if (listen_sock == -1) 76 err(-1, "socket"); 77 78 if (bind(listen_sock, (struct sockaddr *)&sin, sizeof(sin)) == -1) 79 err(-1, "bind"); 80 81 if (listen(listen_sock, -1) == -1) 82 err(-1, "listen"); 83 84 while (1) { 85 accept_sock = accept(listen_sock, NULL, NULL); 86 close(accept_sock); 87 } 88 } 89 90 static void 91 tcpconnect_client(int argc, char *argv[]) 92 { 93 struct sockaddr_in sin; 94 long count, i, port; 95 char *dummy; 96 int sock; 97 int nonblock = 0, md5enable = 0; 98 99 if (argc < 3 || argc > 5) 100 usage(); 101 for (i=3; i < argc; i++) { 102 if (strcmp(argv[i], "nonblock") == 0) 103 nonblock = 1; 104 if (strcmp(argv[i], "tcpmd5") == 0) 105 md5enable = 1; 106 } 107 108 bzero(&sin, sizeof(sin)); 109 sin.sin_len = sizeof(sin); 110 sin.sin_family = AF_INET; 111 if (inet_aton(argv[0], &sin.sin_addr) == 0) 112 err(-1, "listen"); 113 114 port = strtoul(argv[1], &dummy, 10); 115 if (port < 1 || port > 65535 || *dummy != '\0') 116 usage(); 117 sin.sin_port = htons(port); 118 119 count = strtoul(argv[2], &dummy, 10); 120 if (count < 1 || count > 100000 || *dummy != '\0') 121 usage(); 122 123 for (i = 0; i < count; i++) { 124 sock = socket(PF_INET, SOCK_STREAM, 0); 125 if (sock == -1) 126 err(-1, "socket"); 127 128 /* No warning in default case on ENOPROTOOPT. */ 129 if (setsockopt(sock, IPPROTO_TCP, TCP_MD5SIG, 130 &md5enable, sizeof(md5enable)) != 0) { 131 if (errno == ENOPROTOOPT && md5enable > 0) 132 err(-1, "setsockopt(TCP_MD5SIG)"); 133 else if (errno != ENOPROTOOPT) 134 warn("setsockopt(TCP_MD5SIG)"); 135 } 136 137 if (nonblock) { 138 if (fcntl(sock, F_SETFL, O_NONBLOCK) != 0) 139 err(-1, "fcntl(F_SETFL)"); 140 141 if (connect(sock, (struct sockaddr *)&sin, 142 sizeof(sin)) == -1 && errno != EINPROGRESS) 143 err(-1, "connect"); 144 } else { 145 if (connect(sock, (struct sockaddr *)&sin, 146 sizeof(sin)) == -1) 147 err(-1, "connect"); 148 } 149 150 close(sock); 151 } 152 } 153 154 int 155 main(int argc, char *argv[]) 156 { 157 158 if (argc < 2) 159 usage(); 160 161 if (strcmp(argv[1], "server") == 0) 162 tcpconnect_server(argc - 2, argv + 2); 163 else if (strcmp(argv[1], "client") == 0) 164 tcpconnect_client(argc - 2, argv + 2); 165 else 166 usage(); 167 168 exit(0); 169 } 170