1 /*- 2 * Copyright (c) 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 /* 30 * Back end to a variety of TCP-related benchmarks. This program accepts TCP 31 * connections on a port, and echoes all received data back to the sender. 32 * It is capable of handling only one connection at a time out of a single 33 * thread. 34 */ 35 #include <sys/types.h> 36 #include <sys/socket.h> 37 38 #include <netinet/in.h> 39 40 #include <arpa/inet.h> 41 42 #include <err.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 /* 48 * Simple micro-benchmark to see how many connections/second can be created 49 * in a serialized fashion against a given server. A timer signal is used 50 * to interrupt the loop and assess the cost, and uses a fixed maximum 51 * buffer size. It makes no attempt to time out old connections. 52 */ 53 #define BUFFERSIZE 128*1024 54 #define PORT 6060 55 56 static void 57 handle_connection(int accept_sock) 58 { 59 u_char buffer[BUFFERSIZE]; 60 ssize_t len, recvlen, sofar; 61 int s; 62 63 s = accept(accept_sock, NULL, NULL); 64 if (s < 0) { 65 warn("accept"); 66 return; 67 } 68 69 while (1) { 70 recvlen = recv(s, buffer, BUFFERSIZE, 0); 71 if (recvlen < 0 || recvlen == 0) { 72 close(s); 73 return; 74 } 75 sofar = 0; 76 while (sofar < recvlen) { 77 len = send(s, buffer + sofar, recvlen - sofar, 0); 78 if (len < 0) { 79 close(s); 80 return; 81 } 82 sofar += len; 83 } 84 } 85 } 86 87 int 88 main(int argc, char *argv[]) 89 { 90 struct sockaddr_in sin; 91 int accept_sock; 92 93 accept_sock = socket(PF_INET, SOCK_STREAM, 0); 94 if (accept_sock < 0) 95 err(-1, "socket(PF_INET, SOCKET_STREAM, 0)"); 96 97 bzero(&sin, sizeof(sin)); 98 sin.sin_family = AF_INET; 99 sin.sin_len = sizeof(sin); 100 sin.sin_addr.s_addr = INADDR_ANY; 101 sin.sin_port = htons(PORT); 102 103 if (bind(accept_sock, (struct sockaddr *)&sin, sizeof(sin)) < 0) 104 err(-1, "bind"); 105 106 if (listen(accept_sock, -1) < 0) 107 err(-1, "listen"); 108 109 while (1) 110 handle_connection(accept_sock); 111 112 return (0); 113 } 114