A Tiny (Windows) Sockets Server

© Copyright 1997 University of New Haven

 
#ifndef unix
#define WIN32
#include <windows.h>
#include <winsock.h>
#else
#define closesocket close
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#endif
 
#include <stdio.h>
#include <string.h>
 
main()
{
#ifdef _MSC_VER
#define MSVCFAR far
#else
#define MSVCFAR
#endif
 
 struct sockaddr_in server; /* structure to hold an IP address */
 int  sd, sdclient; /* socket descriptor */
 int n;
 
#ifdef WIN32
 WSADATA wsaData;
 WSAStartup(0x0101, &wsaData);
#endif
 
 memset((char *)&server,0,sizeof(server)); /* clear sockaddr structure */
 server.sin_family = AF_INET; /* set family to Internet */
 server.sin_addr.s_addr= htonl(INADDR_ANY);
#define PORT 6996
 server.sin_port= htons(PORT);
 
 /* Create a socket. */
 
 sd = socket(PF_INET, SOCK_STREAM, 0);
 if (sd < 0) {
 fprintf(stderr, "socket creation failed\n");
 exit(1);
 }
 
 
 /* Connect the socket to the specified server. */
 
 if (bind(sd, (struct sockaddr *)&server, sizeof(server)) < 0) {
 fprintf(stderr,"bind failed\n");
 exit(1);
 }
 
#define QLEN 5
 if (listen(sd, QLEN))
 {
 fprintf(stderr,"listen failed\n");
  exit(1);
 }
 
 
 for (;;)
 {
 if ((sdclient= accept(sd, 0, 0)) < 0) {
 fprintf(stderr,"accept failed\n");
 exit(1);
 }
 
 
 send(sdclient, "Server says hi!\n", 16, 0);
 closesocket(sdclient);
 }
 
 /* Close the socket. */
 
 closesocket(sd);
 
 /* Terminate the server program gracefully. */
 
#ifdef WIN32
 WSACleanup();
#endif
 exit(0);
}

Home