Network Programming under Windows

Client-side Programs

#include "stdafx.h" #include <winsock2. h> #include <stdio.h> #pragma comment (lib, "Ws2_32.lib") int main (int argc, char* argv[]) {WORD sockversion = MAK    Eword (2,2);     Wsadata data;    if (WSAStartup (sockversion, &data)! = 0) {return 0;    } Socket sclient = socket (af_inet, sock_stream, ipproto_tcp);        if (sclient = = Invalid_socket) {printf ("INVALID SOCKET!");    return 0;    } sockaddr_in seraddr;    seraddr.sin_family = af_inet;    Seraddr.sin_port = htons (8888); Seraddr.sin_addr. S_un.     S_ADDR = inet_addr ("127.0.0.1");        if (Connect (sclient, (SOCKADDR *) &seraddr, sizeof (seraddr)) = = Socket_error) {printf ("Connect ERROR!");        Closesocket (sclient);    return 0;    } char * senddata = "Hello, tcp server, I am client!\n";    Send (Sclient, SendData, strlen (SendData), 0);    Char recdata[255];    int ret = recv (sclient, Recdata, 255, 0);        if (Ret > 0) {Recdata[ret] = 0x00;    printf (recdata); } CLOSESOCKet (sclient);    WSACleanup (); return 0;}

Server-side programs:

<pre name= "code" class= "OBJC" > #include "stdafx.h" #include <stdio.h> #include <winsock2.h> #pragma    Comment (lib, "Ws2_32.lib") int main (int argc, char* argv[]) {//initialize WSA WORD sockversion = Makeword (2,2);    Wsadata Wsadata;    if (WSAStartup (sockversion, &wsadata)!=0) {return 0;    }//Create socket Socket Slisten = socket (af_inet, sock_stream, ipproto_tcp);        if (Slisten = = Invalid_socket) {printf ("SOCKET error!");    return 0;    }//Bind IP and port sockaddr_in sin;    sin.sin_family = af_inet;    Sin.sin_port = htons (8888); Sin.sin_addr. S_un.     S_ADDR = Inaddr_any;    if (Bind (Slisten, (lpsockaddr) &sin, sizeof (sin)) = = Socket_error) {printf ("Bind ERROR!");        }//Start listening if (Listen (Slisten, 5) = = Socket_error) {printf ("Listen ERROR!");    return 0;    }//Loop receive data SOCKET sclient;    Sockaddr_in remoteaddr;    int naddrlen = sizeof (REMOTEADDR);     Char revdata[255]; while (true) {printf ("Wait for connection ... \ n ");        Sclient = Accept (Slisten, (SOCKADDR *) &remoteaddr, &naddrlen);            if (sclient = = Invalid_socket) {printf ("Accept error!");        Continue                } printf ("Accepted to a connection:%s \ r \ n", Inet_ntoa (REMOTEADDR.SIN_ADDR));                Receive data int ret = recv (sclient, Revdata, 255, 0);            if (Ret > 0) {Revdata[ret] = 0x00;        printf (revdata); }//Send data char * senddata = "Hello, TCP client!"        \ n ";        Send (Sclient, SendData, strlen (SendData), 0);    Closesocket (sclient);    } closesocket (Slisten);    WSACleanup (); return 0;}

Network Programming under Windows