开发测试环境：WIN7SP1、VS2005

UdpServer.cpp

复制代码 代码如下:

#include <iostream>

#include <WinSock2.h>

#include <ws2tcpip.h>

#pragma comment(lib, "ws2_32.lib")

int main(int argc, char** argv)

{

using namespace std;

cout<<"Server Start..."<<endl;

WORD wVersion = 0;

WSADATA wsaData;

memset(&wsaData, 0, sizeof(wsaData));

wVersion = MAKEWORD(2, 2);

if (0 != WSAStartup(wVersion, &wsaData))

{

return -1;

}

if (2 != LOBYTE(wsaData.wVersion) || 2 != HIBYTE(wsaData.wVersion))

{

WSACleanup();

return -1;

}

struct addrinfo hints;

struct addrinfo* res = NULL;

memset(&hints, 0, sizeof(hints));

hints.ai_family = AF_UNSPEC;

hints.ai_socktype = SOCK_DGRAM;

hints.ai_protocol = IPPROTO_UDP;

hints.ai_flags = AI_PASSIVE;

if (0 != getaddrinfo("192.168.0.19", "6677", &hints, &res))

{

WSACleanup();

return -1;

}

SOCKET sk = socket(res->ai_family, res->ai_socktype, res->ai_protocol);

bind(sk, res->ai_addr, res->ai_addrlen);

char recvBuf[1024] = {''};

int lenRecv = 0;

struct sockaddr_storage storage;

int len = sizeof(storage);

memset(&storage, 0, len);

lenRecv = recvfrom(sk, recvBuf, 1024, 0, (struct sockaddr*)&storage, &len);

cout<<"Recv From Client:"<<recvBuf<<" Len:"<<lenRecv<<endl;

sendto(sk, recvBuf, lenRecv, 0, (struct sockaddr*)&storage, len);

WSACleanup();

closesocket(sk);

return 0;

}

UdpClient.cpp

复制代码 代码如下:

#include <iostream>

#include <WinSock2.h>

#include <ws2tcpip.h>

#pragma comment(lib, "ws2_32.lib")

int main(int argc, char** argv)

{

using namespace std;

cout<<"Client Start..."<<endl;

WORD wVersion = 0;

WSADATA wsaData;

memset(&wsaData, 0, sizeof(wsaData));

wVersion = MAKEWORD(2, 2);

if (0 != WSAStartup(wVersion, &wsaData))

{

return -1;

}

if (2 != LOBYTE(wsaData.wVersion) || 2 != HIBYTE(wsaData.wVersion))

{

WSACleanup();

return -1;

}

struct addrinfo hints;

struct addrinfo* res = NULL;

memset(&hints, 0, sizeof(hints));

hints.ai_family = AF_UNSPEC;

hints.ai_socktype = SOCK_DGRAM;

hints.ai_protocol = IPPROTO_UDP;

hints.ai_flags = AI_CANONNAME;

if (0 != getaddrinfo("192.168.0.19", "6677", &hints, &res))

{

WSACleanup();

return -1;

}

SOCKET sk = socket(res->ai_family, res->ai_socktype, res->ai_protocol);

bind(sk, res->ai_addr, res->ai_addrlen);

char recvBuf[1024] = {''};

char sendBuf[1024] = {"abcd"};

int len = res->ai_addrlen;

int lenRecv = 0;

sendto(sk, sendBuf, strlen(sendBuf), 0, res->ai_addr, len);

lenRecv = recvfrom(sk, recvBuf, 1024, 0, res->ai_addr, &(len));

cout<<"Recv From Server:"<<recvBuf<<" Len:"<<lenRecv<<endl;

WSACleanup();

closesocket(sk);

return 0;

}