Socket programing

[dongju.jeong]

Is there any Socket programming in Unigine api that for TCP or UDP?

If not, can I use a normal Winsock2 header?

[silent]

dongju.jeong

Maybe Unigine::Socket will fit your needs? https://developer.unigine.com/en/docs/2.9/api/library/networking/class.socket

[dongju.jeong]

thank you .

When using sockets, do I have to set the sending size and receiving size first? Or can I omit it?

 

socket->send(SEND_SIZE);

socket->recv(RECV_SIZE);

[cash-metall]

simplest example

 

// client socket 
Unigine::SocketPtr send_socket_ptr = Socket::create(Socket::SOCKET_DGRAM);                                                              
if (host_adress.size() && send_socket_ptr->open(host_adress, send_port) == 0)                                        
{                                                                                                                    
	Log::error("can't create client socket\n");                                                 
	return;                                                                                                          
}  

// listen socket
Unigine::SocketPtr recv_socket_ptr = Socket::create(Socket::SOCKET_DGRAM);                                                              
if (recv_socket_ptr->open(recv_port) == 0 || recv_socket_ptr->bind() == 0 || recv_socket_ptr->nonblock() == 0)       
{                                                                                                                    
	Log::error("can't create listen socket\n");                                              
	return;                                                                                                          
}    

///...............

// send
if (send_socket_ptr.get() && send_socket_ptr->isOpened())
{
unsigned char *packet_data = ....
int dest_size = ...
send_socket_ptr->write(packet_data, dest_size);                 
}

// read 
if (recv_socket_ptr.get() && recv_socket_ptr->isOpened() && recv_socket_ptr->isReadyToRead(1000))
{
unsigned char *packet_data = new unsigned char[MAX_PACKET_SIZE * 2];
int src_size = (int)recv_socket_ptr->read(packet_data, packet_size);
//...
}
                                                                                                                

you can also see the source code of the old СigiСlient plugin.
the way to work with our sockets has not changed.

[dongju.jeong]

Is it the same for sending or receiving data to other programs as normal way in the example and for communicating data through the Blob class?

Blob is just usefull buffer?

[cash-metall]

yes. The Blob it`s just comfortable wrap over the unsigned char *