UDP socket client and UDP server-side program sample sharing _c language

UDP Socket

Copy Code code as follows:

#include <WinSock2.h>
#include <stdio.h>
#pragma comment (lib, "Ws2_32.lib")
int main ()
{
Initial Socket Library
WORD wverisonrequested;
Wsadata Wsadata;
int err;
wverisonrequested = Makeword (1, 1);
Err = WSAStartup (wverisonrequested, &wsadata);
if (Err!= 0)
{
return-1;
}
if (Lobyte (wsadata.wversion)!= 1 | |
Hibyte (wsadata.whighversion)!= 1)
//{
WSACleanup ();
return-1;
//}

Create socket
Socket sockserver = socket (af_inet, SOCK_DGRAM, 0);

Bind socket
Sockaddr_in Addrserver;
Addrserver.sin_addr. S_un. S_ADDR = htonl (Inaddr_any);
addrserver.sin_family = af_inet;
Addrserver.sin_port = htons (6000);
Bind (Sockserver, (SOCKADDR *) &addrserver, sizeof (Addrserver));

Receive
Sockaddr_in addrclient;
int len = sizeof (addrclient);
Char recvbuf[100];
Recvfrom (Sockserver, Recvbuf, 0, (SOCKADDR *) &addrclient, &len);
printf ("%s", recvbuf);

Close socket
Closesocket (Sockserver);
WSACleanup ();
}

UDP Client

Copy Code code as follows:

#include <WinSock2.h>
#include <stdio.h>

#pragma comment (lib, "Ws2_32.lib")

int main ()
{
Initial Socket Library
WORD wverisonrequested;
Wsadata Wsadata;
int err;
wverisonrequested = Makeword (1, 1);
Err = WSAStartup (wverisonrequested, &wsadata);
if (Err!= 0)
{
return-1;
}
if (Lobyte (wsadata.wversion)!= 1 | |
Hibyte (wsadata.whighversion)!= 1)
//{
WSACleanup ();
return-1;
//}

Create socket
Socket sockclient = socket (af_inet, SOCK_DGRAM, 0);
Sockaddr_in Addrserver;
Addrserver.sin_addr. S_un. S_ADDR = inet_addr ("127.0.0.1");
addrserver.sin_family = af_inet;
Addrserver.sin_port = htons (6000);

Send
Char sendbuf[100] = "This is lisi\n";
SendTo (Sockclient, SendBuf, strlen (SENDBUF) +1,0, (sockaddr*) &addrserver, sizeof (SOCKADDR));

Close connection Socket
Closesocket (sockclient);

Clean Socket Library
WSACleanup ();
}