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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(hù)地址長(zhǎng)度
int iLen;
//發(fā)送的數(shù)據(jù)長(zhǎng)度
int iSend;
//接收的數(shù)據(jù)長(zhǎng)度
int iRecv;
//要發(fā)送給客戶(hù)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(hù)地址
struct sockaddr_in ser,cli;
WSAStartup(MAKEWORD(1,1),&wsaData) ;////加載socket庫(kù)
sSocket = socket(AF_INET,SOCK_DGRAM,0);///創(chuàng)建socket
ser.sin_family = AF_INET;
ser.sin_port = htons(iPort);//端口號(hào)
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(tīng)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(gè)IP轉(zhuǎn)換成一個(gè)互聯(lián)網(wǎng)標(biāo)準(zhǔn)點(diǎn)分格式的字符串將一個(gè)無(wú)符號(hào)短整形數(shù)從網(wǎng)絡(luò)字節(jié)順序轉(zhuǎn)換為主機(jī)字節(jié)順序
}
}
closesocket(sSocket);
WSACleanup();
}
/**********客戶(hù)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(hù)地址長(zhǎng)度
int iLen,nbind;
//發(fā)送的數(shù)據(jù)長(zhǎng)度
int iSend;
//接收的數(shù)據(jù)長(zhǎng)度
int iRecv;
//要發(fā)送給客戶(hù)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(hù)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(hào)
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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