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標題: 基于winsock的udp通信 [打印本頁]

作者: 51黑fan 時間: 2016-1-31 00:40
標題: 基于winsock的udp通信
基于vc6.0發(fā)送單接收自回環(huán)
/****************服務(wù)器************/
#include<winsock2.h>
#include<stdio.h>
#include<stdlib.h>
#pragma comment (lib,"ws2_32.lib")
#define DEFAULT_PORT 5050
#define BUFFER_LENGTH 1024
void main()
{
  int iPort =DEFAULT_PORT;
  WSADATA wsaData;
  SOCKET sSocket;
  //客戶地址長度
  int iLen;
  //發(fā)送的數(shù)據(jù)長度
  int iSend;
  //接收的數(shù)據(jù)長度
  int iRecv;
  //要發(fā)送給客戶的信息
  char send_buf[] = "Hello,I am a server";
  //接收數(shù)據(jù)的緩沖區(qū)
  char recv_buf[BUFFER_LENGTH] ;
  //本地地址和客戶地址
  struct sockaddr_in ser,cli;
  WSAStartup(MAKEWORD(1,1),&wsaData) ;////加載socket庫
  sSocket = socket(AF_INET,SOCK_DGRAM,0);///創(chuàng)建socket
  ser.sin_family = AF_INET;
  ser.sin_port = htons(iPort);//端口號
  ser.sin_addr.s_addr = htonl(INADDR_LOOPBACK);//(INADDR_ANY);////從固定的網(wǎng)卡綁定ip地址
  int nbind = bind(sSocket,(SOCKADDR *)&ser,sizeof(SOCKADDR)); ///綁定要偵聽的地址
if (SOCKET_ERROR==nbind)
{
closesocket(sSocket);
}

  iLen=sizeof (cli);
  memset(recv_buf,0,sizeof(recv_buf));
  while(1)
  {
iRecv=recvfrom(sSocket,recv_buf,BUFFER_LENGTH,0,(SOCKADDR *)&cli,&iLen);
  if(iRecv == SOCKET_ERROR)
{
   printf("recvfrom() Failed: %d \n",WSAGetLastError());
   return;
}
  else if(iRecv == 0)
         break;
  else
      {
         printf("recvfrom(): %s \n",recv_buf);
         printf("Accepted client ip:[%s],port:[%d] \n",inet_ntoa(cli.sin_addr),ntohs(cli.sin_port));////將一個IP轉(zhuǎn)換成一個互聯(lián)網(wǎng)標準點分格式的字符串將一個無符號短整形數(shù)從網(wǎng)絡(luò)字節(jié)順序轉(zhuǎn)換為主機字節(jié)順序
      }

  }
  closesocket(sSocket);
  WSACleanup();
}
/**********客戶端************/
#include<winsock2.h>
#include<stdio.h>
#include<stdlib.h>
#pragma comment (lib,"ws2_32.lib")
#define DEFAULT_PORT 5050
#define BUFFER_LENGTH 1024
void main()
{
  int iPort =DEFAULT_PORT;
  WSADATA wsaData;
  SOCKET sSocket;
  //客戶地址長度
  int iLen,nbind;
  //發(fā)送的數(shù)據(jù)長度
  int iSend;
  //接收的數(shù)據(jù)長度
  int iRecv;
  //要發(fā)送給客戶的信息
  char send_buf[] = "Hello,I am a server";
  //接收數(shù)據(jù)的緩沖區(qū)
  char recv_buf[BUFFER_LENGTH] ;
  //本地地址和客戶地址
  struct sockaddr_in ser;
  WSAStartup(MAKEWORD(1,1),&wsaData);
  sSocket = socket(AF_INET,SOCK_DGRAM,0);
  ser.sin_family = AF_INET;
  ser.sin_port = htons(iPort);//端口號
  ser.sin_addr.s_addr = htonl(INADDR_LOOPBACK);//(INADDR_ANY);////從固定的網(wǎng)卡綁定ip地址
while(1)
  {
iSend = sendto(sSocket,send_buf,sizeof(send_buf),0,(SOCKADDR *)&ser,sizeof(ser));
if(iSend = 0)
         break;
   else
{
printf("sendto() succeeded! \n");
printf("------------------------------\n");
}
}
  closesocket(sSocket);
  WSACleanup();
}

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