87 lines
2 KiB
C
87 lines
2 KiB
C
// Copyright 2020 Hugo Lindström <hugolm84@gmail.com>
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// This software is supplied under the terms of the MIT License, a
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// copy of which should be located in the distribution where this
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// file was obtained (LICENSE.txt). A copy of the license may also be
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// found online at https://opensource.org/licenses/MIT.
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#include <stdio.h>
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#include <stdlib.h>
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#include <winsock2.h>
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void
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wsa_fatal(const char *func)
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{
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fprintf(stderr, "%s: %d\n", func, WSAGetLastError());
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exit(1);
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}
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int
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server(int portno)
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{
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WSADATA wsa;
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SOCKET s, new_socket;
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struct sockaddr_in server, client;
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int c;
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char * message;
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printf("Initialising Winsock...\n");
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if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0) {
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wsa_fatal("Failed to call WSAStartup");
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}
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printf("Initialised WSA.\n");
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// Create a socket
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if ((s = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
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wsa_fatal("Could not create socket");
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}
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printf("Socket created.\n");
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// Prepare the sockaddr_in structure
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server.sin_family = AF_INET;
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server.sin_addr.s_addr = INADDR_ANY;
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server.sin_port = htons(portno);
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// Bind
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if (bind(s, (struct sockaddr *) &server, sizeof(server)) ==
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SOCKET_ERROR) {
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wsa_fatal("Bind failed");
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}
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printf("Bind done\n");
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// Listen to incoming connections
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listen(s, 3);
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// Accept and incoming connection
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printf("Waiting for incoming connections...\n");
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c = sizeof(struct sockaddr_in);
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while ((new_socket = accept(s, (struct sockaddr *) &client, &c)) !=
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INVALID_SOCKET) {
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printf("Connection accepted\n");
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// Reply to the client
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message = "Hello Client!";
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if (send(new_socket, message, (int) strlen(message), 0) ==
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SOCKET_ERROR) {
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wsa_fatal("Failed to send message to client!");
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}
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}
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if (new_socket == INVALID_SOCKET) {
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wsa_fatal("accept failed");
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}
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if (closesocket(s) == SOCKET_ERROR) {
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wsa_fatal("Failed to close socket");
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}
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if (WSACleanup() == SOCKET_ERROR) {
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wsa_fatal("Failed to WSACleanup");
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}
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return 0;
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}
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