155 lines
4.5 KiB
C
155 lines
4.5 KiB
C
/* server-tcp.c
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*
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* Copyright (C) 2006-2020 wolfSSL Inc.
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*
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* This file is part of wolfSSL. (formerly known as CyaSSL)
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*
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* wolfSSL 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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* wolfSSL 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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/* the usual suspects */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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/* socket includes */
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <unistd.h>
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#define DEFAULT_PORT 11111
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int main()
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{
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int ret;
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int sockfd;
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int connd;
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struct sockaddr_in servAddr;
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struct sockaddr_in clientAddr;
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socklen_t size = sizeof(clientAddr);
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char buff[256];
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size_t len;
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int shutdown = 0;
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const char* reply = "I hear ya fa shizzle!\n";
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/* Create a socket that uses an internet IPv4 address,
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* Sets the socket to be stream based (TCP),
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* 0 means choose the default protocol. */
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if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
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fprintf(stderr, "ERROR: failed to create the socket\n");
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ret = -1;
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goto end;
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}
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/* Initialize the server address struct with zeros */
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memset(&servAddr, 0, sizeof(servAddr));
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/* Fill in the server address */
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servAddr.sin_family = AF_INET; /* using IPv4 */
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servAddr.sin_port = htons(DEFAULT_PORT); /* on DEFAULT_PORT */
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servAddr.sin_addr.s_addr = INADDR_ANY; /* from anywhere */
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/* Bind the server socket to our port */
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if (bind(sockfd, (struct sockaddr*)&servAddr, sizeof(servAddr)) == -1) {
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fprintf(stderr, "ERROR: failed to bind\n");
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ret = -1;
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goto servsocket_cleanup;
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}
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/* Listen for a new connection, allow 5 pending connections */
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if (listen(sockfd, 5) == -1) {
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fprintf(stderr, "ERROR: failed to listen\n");
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ret = -1;
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goto servsocket_cleanup;
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}
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/* Continue to accept clients until shutdown is issued */
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while (!shutdown) {
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printf("Waiting for a connection...\n");
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/* Accept client connections */
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if ((connd = accept(sockfd, (struct sockaddr*)&clientAddr, &size))
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== -1) {
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fprintf(stderr, "ERROR: failed to accept the connection\n\n");
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ret = -1;
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goto servsocket_cleanup;
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}
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printf("Client connected successfully\n");
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/* Read the client data into our buff array */
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memset(buff, 0, sizeof(buff));
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if ((ret = read(connd, buff, sizeof(buff)-1)) == -1) {
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fprintf(stderr, "ERROR: failed to read\n");
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goto clientsocket_cleanup;
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}
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/* Print to stdout any data the client sends */
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printf("Client: %s\n", buff);
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/* Check for server shutdown command */
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if (strncmp(buff, "shutdown", 8) == 0) {
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printf("Shutdown command issued!\n");
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shutdown = 1;
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}
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/* Write our reply into buff */
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memset(buff, 0, sizeof(buff));
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memcpy(buff, reply, strlen(reply));
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len = strnlen(buff, sizeof(buff));
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/* Reply back to the client */
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if ((ret = write(connd, buff, len)) != len) {
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fprintf(stderr, "ERROR: failed to write\n");
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goto clientsocket_cleanup;
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}
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/* Cleanup after this connection */
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close(connd); /* Close the connection to the client */
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}
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printf("Shutdown complete\n");
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/* Cleanup and return */
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clientsocket_cleanup:
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close(connd); /* Close the connection to the client */
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servsocket_cleanup:
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close(sockfd); /* Close the socket listening for clients */
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end:
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return ret; /* Return reporting a success */
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/* Cleanup and return */
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close(sockfd); /* Close the socket listening for clients */
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return 0; /* Return reporting a success */
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}
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