TCP HelloWord

client.cpp

#include <stdio.h>

#include <winsock2.h>

#pragma comment (lib,"ws2_32")



//流程

//WSAStarup socket connect recv/send closesocket WSACleanup

int main(int argc,char* argv[])

{

     WSADATA wsaData;

     WSAStartup(MAKEWORD(2,2),&wsaData);



     SOCKET s = socket(PF_INET,SOCK_STREAM,IPPROTO_TCP);



     sockaddr_in addr;

     addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");

     addr.sin_family = PF_INET;

     addr.sin_port = htons(827);



     connect(s,(SOCKADDR*)&addr,sizeof(SOCKADDR));



     char szBuffer[MAXBYTE] = {0};

     recv(s,szBuffer,MAXBYTE,NULL);



     printf("szBuffer = %s \r\n",szBuffer);



     closesocket(s);



     WSACleanup();



     return 0;

}

Server.cpp

//WSAStartup socket bind listen accept send/recv closesocket WSACleanup

#include <winsock2.h>

#pragma comment (lib,"ws2_32")



int main(int argc , char* grgv[])

{

     WSADATA wsaData;

     WSAStartup(MAKEWORD(2,2),&wsaData);



     SOCKET s = socket(PF_INET,SOCK_STREAM,IPPROTO_TCP);



     sockaddr_in addr;

     addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");

     addr.sin_port = htons(827);

     addr.sin_family = PF_INET;



     bind(s,(SOCKADDR*)&addr,sizeof(SOCKADDR));



     listen(s,1);



     SOCKADDR clientAddr;

     int nSize = sizeof(SOCKADDR);

     SOCKET clientSock;



     clientSock = accept(s,(SOCKADDR*)&clientAddr,&nSize);



     send(clientSock,"hello client \r\n",strlen("hello client \r\n" + sizeof(char)),NULL);



     closesocket(clientSock);

     closesocket(s);



     WSACleanup();

     return 0;

}