139 lines
4.1 KiB
C
139 lines
4.1 KiB
C
/* server-tcp.c
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*
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* Copyright (C) 2006-2014 wolfSSL Inc.
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*
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* This file is part of CyaSSL.
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*
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* CyaSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* CyaSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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* =============================================================================
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*
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* This is a super basic example of what a TCP Server might look like that is
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* not actively using any form of security.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <string.h>
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#include <netinet/in.h>
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#include <stdlib.h>
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#include <errno.h>
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#define DEFAULT_PORT 11111
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int AcceptAndRead(socklen_t sockfd);
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int AcceptAndRead(socklen_t sockfd)
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{
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struct sockaddr_in clientAddr;
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socklen_t size = sizeof(clientAddr);
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int ret = 0;
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/* Wait until a client connects */
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int connd = accept(sockfd,(struct sockaddr *)&clientAddr, &size);
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/* If fails to connect, loop back up and wait for a new connection */
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if (connd == -1){
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printf("failed to accept the connection..\n");
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}
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/* If it connects, read in and reply to the client */
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else{
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printf("Client connected successfully\n");
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for ( ; ; ){
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char buff[256];
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/* Clear the buffer memory for anything possibly left over */
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bzero(&buff, sizeof(buff));
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/* Read the client data into our buff array */
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if ((ret = read(connd, buff, sizeof(buff)-1)) > 0){
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/* Print any data the client sends to the console */
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printf("Client: %s\n", buff);
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/* Create our reply message */
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char reply[] = "I hear ya fa shizzle!\n";
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/* Reply back to the client */
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if ((ret = write(connd, reply, sizeof(reply)-1)) < 0)
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printf("write error\n");
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}
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/* If the client disconnects break the loop */
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else
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break;
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}
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}
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/* Close the socket */
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close(connd);
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return 0;
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}
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int main()
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{
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/*
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* Creates a socket that uses an internet IP address,
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* Sets the type to be Stream based (TCP),
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* 0 means choose the default protocol.
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*/
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/* Identify and access the sockets */
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socklen_t sockfd = socket(AF_INET, SOCK_STREAM, 0);
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int exit = 0; /* 0 = false, 1 = true */
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/* If positive value, the socket is valid */
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if(sockfd == -1){
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printf("ERROR: failed to create the socket\n");
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return 1; /* Kill the server with exit status 1 */
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}
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/* Server and client socket address structures */
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struct sockaddr_in serverAddr;
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/* Initialize the server address struct to zero */
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memset((char *)&serverAddr, 0, sizeof(serverAddr));
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/* Fill the server's address family */
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serverAddr.sin_family = AF_INET;
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serverAddr.sin_addr.s_addr = INADDR_ANY;
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serverAddr.sin_port = htons(DEFAULT_PORT);
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/* Attach the server socket to our port */
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if(bind(sockfd, (struct sockaddr *)&serverAddr, sizeof(serverAddr)) < 0){
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printf("ERROR: failed to bind\n");
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return 1;
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}
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/* Continuously accept connections while not currently in an active connection or told to quit */
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while (exit == 0){
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/* Listen for a new connection, allow 5 pending connections */
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listen(sockfd, 5);
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printf("Waiting for a connection...\n");
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/* Accept client connections and read from them */
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exit = AcceptAndRead(sockfd);
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}
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/* Close the open sockets */
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close(sockfd);
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return 0;
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}
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