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<xml>
<head>
<title>Using Network Sockets, ClanLib API overview</title>
</head>
<body>
<h2>Abstract: </h2>
<p>An overview covering how to use sockets directly in ClanLib </p>
<p>The socket interface in ClanLib provides a way to directly access the sockets so you
don't have to use CL_NetworkSession & friends.</p>
<h3> Initializing the Network </h3>
<p> In order to use sockets we must first initialize the network. <p>
<code>
#include <ClanLib/application.h>
#include <ClanLib/core.h>
#include <ClanLib/network.h>
#include <ClanLib/Network/socket.h>
class MyNetApp : public CL_ClanApplication
{
public:
virtual int main(int argc, char **argv)
{
CL_SetupCore::init();
CL_SetupNetwork::init();
CL_Socket *sock;
CL_IPAddress ip;
}
}
</code>
<p>This is just the basic outline of a program. We need to assign sock a Socket type. It can be either tcp or udp. To do so we use this code.</p>
<code>
...
CL_Socket *sock = new CL_Socket(CL_Socket::tcp);
...
</code>
<p>Now a port must be assigned to CL_IPAddress. A host may also be specified, but we won't go into that right now. Please note, port numbers <1024 are considered priviledged. Which means that in certain environments(eg. Unix, Windows NT) they cannot be used with Administrator/Root access.</p>
<code>
...
CL_IPAddress ip;
ip.set_port(3490);
...
</code>
<p>Next, we must setup the bindings for the socket. The bindings will signal other parts of your program when an event occurs.</p>
<code>
...
sock->bind(ip);
sock->sig_read_triggered().connect(this, &MyNetApp::conn);
sock->sig_write_triggered().connect(this, &MyNetApp::conn);
sock->sig_exception_triggered().connect(this, &MyNetApp::conn);
...
void MyNetApp::conn() { cout << "Hello World" << endl; }
</body>
</xml>
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