IPv6 implement UDP programming example _c language

Development test Environment: WIN7SP1, VS2005

UdpServer.cpp

Copy Code code as follows:

#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] = {' I '};
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

Copy Code code as follows:

#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] = {' I '};
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;
}