简单 TCP UDP server client

UDP：

server

#include "stdafx.h"
#include <stdio.h>
#include <Winsock2.h>
#pragma comment(lib,"WS2_32.lib")

void main()
{

WORD wVersionRequested;
 WSADATA wsaData;
 int err;
 
 wVersionRequested = MAKEWORD( 1, 1 );
 
 err = WSAStartup( wVersionRequested, &wsaData );
 if ( err != 0 ) {
  return;
 }
 

 if ( LOBYTE( wsaData.wVersion ) != 1 ||
        HIBYTE( wsaData.wVersion ) != 1 ) {
  WSACleanup( );
  return; 
 }
 SOCKET sockSrv=socket(AF_INET,SOCK_DGRAM,0);

 SOCKADDR_IN addrSrv;
 addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
 addrSrv.sin_family=AF_INET;
 addrSrv.sin_port=htons(5010);

 bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));

 char recvBuf[100];
 char sendBuf[100];
 char tempBuf[200];

 SOCKADDR_IN addrClient;
 int len=sizeof(SOCKADDR);

 while(1)
 {
  recvfrom(sockSrv,recvBuf,100,0,(SOCKADDR*)&addrClient,&len);
  if('q'==recvBuf[0])
  {
   sendto(sockSrv,"q",strlen("q")+1,0,(SOCKADDR*)&addrClient,len);
   printf("Chat end!\n");
   break;
  }
  sprintf(tempBuf,"%s say : %s",inet_ntoa(addrClient.sin_addr),recvBuf);
  printf("%s\n",tempBuf);
  /*
  printf("Please input data:\n");
  gets(sendBuf);
  sendto(sockSrv,sendBuf,strlen(sendBuf)+1,0,(SOCKADDR*)&addrClient,len);
  */
 }
 closesocket(sockSrv);
 WSACleanup();
}

client

void main()
{

WORD wVersionRequested;
 WSADATA wsaData;
 int err;
 
 wVersionRequested = MAKEWORD( 1, 1 );
 
 err = WSAStartup( wVersionRequested, &wsaData );
 if ( err != 0 ) {
  return;
 }
 

 if ( LOBYTE( wsaData.wVersion ) != 1 ||
        HIBYTE( wsaData.wVersion ) != 1 ) {
  WSACleanup( );
  return; 
 }

 SOCKET sockClient=socket(AF_INET,SOCK_DGRAM,0);

 SOCKADDR_IN addrSrv;
 addrSrv.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");
 addrSrv.sin_family=AF_INET;
 addrSrv.sin_port=htons(6000);

 char recvBuf[100];
 char sendBuf[100];
 char tempBuf[200];

 int len=sizeof(SOCKADDR);

 while(1)
 {
  printf("Please input data:\n");
  gets(sendBuf);
  sendto(sockClient,sendBuf,strlen(sendBuf)+1,0,
   (SOCKADDR*)&addrSrv,len);
  recvfrom(sockClient,recvBuf,100,0,(SOCKADDR*)&addrSrv,&len);
  if('q'==recvBuf[0])
  {
   sendto(sockClient,"q",strlen("q")+1,0,
    (SOCKADDR*)&addrSrv,len);
   printf("Chat end!\n");
   break;
  }
  sprintf(tempBuf,"%s say : %s",inet_ntoa(addrSrv.sin_addr),recvBuf);
  printf("%s\n",tempBuf);

 }
 closesocket(sockClient);
 WSACleanup();
}

TCP

server：

WORD wVersionRequested;
 WSADATA wsaData;
 int err;
 
 wVersionRequested = MAKEWORD( 1, 1 );
 
 err = WSAStartup( wVersionRequested, &wsaData );
 if ( err != 0 ) {
  return;
 }
 
 if ( LOBYTE( wsaData.wVersion ) != 1 ||HIBYTE( wsaData.wVersion ) != 1 ) {
  WSACleanup( );
  return;
 }
 //SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0);//tcp

SOCKET sockSrv=socket(AF_INET,SOCK_DGRAM,0);//udp
 SOCKADDR_IN addrSrv;//server
// SOCKADDR_IN addrfrom;//client
 int   fromlen   =sizeof(addrfrom);
 addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
 addrSrv.sin_family=AF_INET;
 addrSrv.sin_port=htons(5010);

bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));

 listen(sockSrv,5);

 SOCKADDR_IN addrClient;
 int len=sizeof(SOCKADDR);
 while(1)
 {
  SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len);
  char sendBuf[50];
  sprintf(sendBuf,"Welcome %s to here!",inet_ntoa(addrClient.sin_addr));
  send(sockConn,sendBuf,strlen(sendBuf)+1,0);
  char recvBuf[50];
  recv(sockConn,recvBuf,50,0);
  printf("%s\n",recvBuf);
  closesocket(sockConn);
 }

client

WORD wVersionRequested;
 WSADATA wsaData;
 int err;
 
 wVersionRequested = MAKEWORD( 1, 1 );
 
 err = WSAStartup( wVersionRequested, &wsaData );
 if ( err != 0 ) {
  return;
 }
 
 if ( LOBYTE( wsaData.wVersion ) != 1 ||HIBYTE( wsaData.wVersion ) != 1 ) {
  WSACleanup( );
  return;
 }
// SOCKET sockClient=socket(AF_INET,SOCK_STREAM,0);
  SOCKET sockClient=socket(AF_INET,SOCK_DGRAM,0);
 SOCKADDR_IN addrSrv;
 addrSrv.sin_addr.S_un.S_addr=inet_addr("192.168.0.202");
 addrSrv.sin_family=AF_INET;
 addrSrv.sin_port=htons(5010);
// connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
 send(sockClient,"hello word",strlen("hello word")+1,0);
 char recvBuf[50];
 recv(sockClient,recvBuf,50,0);
 printf("%s\n",recvBuf);
 send(sockClient,recvBuf,strlen(recvBuf)+1,0);
 closesocket(sockClient);
 WSACleanup();