Winsock

I think winsock was replaced with .net objects, but I also prefer the hands on approach. Ill post an example later.

Try going to

msdn2.microsoft.com/en-us/library/ms738566.aspx
or
http://www.sockaddr.com/ExampleSourceCode.html and download stream.zip

.cpp file. Hope you can see something useful from this.

//Udp and tcpip class to wrap up the old style sockets in Visual studio.
//.NET has a new class for doing these tasks. I do not know if tcpip
//portion works or not. The client/server thing was not my
//idea but came from the examples -- honestly you can just open
//every socket to send and receive and have less complications.
//It works for our UDP needs and can be abandoned if we need
//something better (use the .net class).

#include "Udp-Tcp.h"
#include <iostream>
using namespace std;
void jcomm_t::jcomm_client_init(int portnum, char * host_name, bool is_udp)//func
{
// Notice that almost nothing in this code is specific to whether we
// are using UDP or TCP. The socket open command is the only place.
// When connect() is called on a udp socket, it does not
// actually establish the connection as a TCP socket
// would. Instead, TCP establishes the remote half of the
// ( LocalIPAddress, LocalPort, RemoteIP, RemotePort) mapping.
// This enables us to use send() and recv() on datagram sockets,
// instead of recvfrom() and sendto() -- making this a generic object
//suited for either tcp or udp transmission

port = portnum;
host = host_name;
udp = is_udp;
WSAStartup(0x202,&WSAData); //X202 is 514 decimal, it is the 'version required' of something or other.

if (isalpha(host[0])) //if its a Name or a number, we can open it either way
{
phostent = gethostbyname(host);
}
else
{
Addr = inet_addr(host);
phostent = gethostbyaddr((char *)&Addr,4,AF_INET);
}
if(phostent == NULL)
{
failed = true;
return;
}
failed = false;

memset(&server,0,sizeof(server));
memcpy(&(server.sin_addr),phostent ->h_addr,phostent ->h_length);
server.sin_family = phostent ->h_addrtype;
server.sin_port = htons(port);

if(udp)
WinSocket = socket(AF_INET,SOCK_DGRAM,0); // Open a socket udp style
else
{
WinSocket = socket(AF_INET,SOCK_STREAM,0); // Open a socket tcp style
}

/*
local.sin_family = AF_INET;
local.sin_addr.s_addr = INADDR_ANY; //inet_addr("204.130.141.139"); //could be set to an ip address
local.sin_port = htons(port);
cout << local.sin_port << endl;
bool val = true;
setsockopt(WinSocket,IPPROTO_IP,SO_REUSEADDR, (char *) &val, sizeof(bool));
bind(WinSocket,(sockaddr*)&local,sizeof(local) ); */
connect(WinSocket ,(sockaddr*)&server,sizeof(server)) ;

/*
sockaddr getsa;
int namelen;
getsockname (WinSocket,&getsa, &namelen );
int x;
for(x = 0; x < namelen; x++)
printf("%x",getsa.sa_data[x]);
cout << endl; */
jcomm_show_error();
}
void jcomm_t::jcomm_client_send()//func
{
if(!failed)
send(WinSocket, data, size_of_datagram ,0);
}
void jcomm_t::jcomm_server_init(int portnum, bool is_udp)//func
{
port = portnum;
udp = is_udp;
WSAStartup(0x202,&WSAData);
local.sin_family = AF_INET;
local.sin_addr.s_addr = INADDR_ANY; //could be set to an ip address
local.sin_port = htons(port);
if(udp)
WinSocket= socket(AF_INET, SOCK_DGRAM ,0); //udp
else
WinSocket= socket(AF_INET, SOCK_STREAM,0); //tcp
bind(WinSocket,(sockaddr*)&local,sizeof(local) );
// We cannot listen() on a UDP socket.
fromlen =sizeof(from);
if (!udp)
{
listen(WinSocket,100);
tcsocket = accept(WinSocket,(struct sockaddr*)&from, &fromlen);
inet_ntoa(from.sin_addr),
htons(from.sin_port) ;
}
else
tcsocket = WinSocket;
}
UINT jcomm_tcpip_thread(LPVOID pointer)//func
{
jcomm_t * pj = (jcomm_t *) pointer;
listen(pj->WinSocket,5);
pj->fromlen =sizeof(pj->from);
pj->tcsocket = accept(pj->WinSocket,(sockaddr*)&(pj->from), &(pj->fromlen));
inet_ntoa(pj->from.sin_addr);
htons(pj->from.sin_port) ;
/*
for(;;)
{
recv(pj->tcsocket,pj->data,size_of_datagram,0 );
//process data here
}
*/
return 0;
}
UINT jcomm_udp_thread(LPVOID pointer)//func
{
jcomm_t * pj = (jcomm_t *) pointer;
for(;;)
{
recvfrom(pj->tcsocket,pj->data,size_of_datagram,0,
(sockaddr *)&(pj->from),&(pj->fromlen));
//process data here
}
return 0;
}
void jcomm_t::jcomm_server_start()//func
{
if(udp)
AfxBeginThread(jcomm_udp_thread, this, THREAD_PRIORITY_LOWEST, 0, 0, NULL);
else
AfxBeginThread(jcomm_tcpip_thread, this, THREAD_PRIORITY_LOWEST, 0, 0, NULL);
}
void jcomm_t::jcomm_cleanup()//func
{
closesocket(WinSocket);
WSACleanup();
}
bool jcomm_t::jcomm_show_error()//func
{
//removed function to print name of getlasterror enum to make it fit
}

then to use it you can do

InUdpConnection.jcomm_server_init(3794,true); //udp listener
OutUdpDbug.jcomm_client_init(3800,"127.0.0.1",true); //udp talker

recvfrom(InUdpConnection.tcsocket,(char*)Msg.RawMsg,
size_of_datagram,//just the max size allowed here
0, // MSG_PEEK, //flags
(sockaddr *)&(InUdpConnection.from),(socklen_t*)(&(InUdpConnection.fromlen))); //the sender's information

etc. If you have any troubles post here, sorry I was slow getting it posted

Thanks very much jonnin, ill see what i can make from this. :)