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 27/* 28 * Back end to a variety of TCP-related benchmarks. This program accepts TCP 29 * connections on a port, and echoes all received data back to the sender. 30 * It is capable of handling only one connection at a time out of a single 31 * thread. 32 */ 33#include <sys/types.h> 34#include <sys/socket.h> 35 36#include <netinet/in.h> 37 38#include <arpa/inet.h> 39 40#include <err.h> 41#include <stdlib.h> 42#include <string.h> 43#include <unistd.h> 44 45/* 46 * Simple micro-benchmark to see how many connections/second can be created 47 * in a serialized fashion against a given server. A timer signal is used 48 * to interrupt the loop and assess the cost, and uses a fixed maximum 49 * buffer size. It makes no attempt to time out old connections. 50 */ 51#define BUFFERSIZE 128*1024 52#define PORT 6060 53 54static void 55handle_connection(int accept_sock) 56{ 57 u_char buffer[BUFFERSIZE]; 58 ssize_t len, recvlen, sofar; 59 int s; 60 61 s = accept(accept_sock, NULL, NULL); 62 if (s < 0) { 63 warn("accept"); 64 return; 65 } 66 67 while (1) { 68 recvlen = recv(s, buffer, BUFFERSIZE, 0); 69 if (recvlen < 0 || recvlen == 0) { 70 close(s); 71 return; 72 } 73 sofar = 0; 74 while (sofar < recvlen) { 75 len = send(s, buffer + sofar, recvlen - sofar, 0); 76 if (len < 0) { 77 close(s); 78 return; 79 } 80 sofar += len; 81 } 82 } 83} 84 85int 86main(int argc, char *argv[]) 87{ 88 struct sockaddr_in sin; 89 int accept_sock; 90 91 accept_sock = socket(PF_INET, SOCK_STREAM, 0); 92 if (accept_sock < 0) 93 err(-1, "socket(PF_INET, SOCKET_STREAM, 0)"); 94 95 bzero(&sin, sizeof(sin)); 96 sin.sin_family = AF_INET; 97 sin.sin_len = sizeof(sin); 98 sin.sin_addr.s_addr = INADDR_ANY; 99 sin.sin_port = htons(PORT); 100 101 if (bind(accept_sock, (struct sockaddr *)&sin, sizeof(sin)) < 0) 102 err(-1, "bind"); 103 104 if (listen(accept_sock, -1) < 0) 105 err(-1, "listen"); 106 107 while (1) 108 handle_connection(accept_sock); 109 110 return (0); 111} 112