11 years, 6 months ago.

understanding HTTPServer/EthernetNetIf

This is the code i get when i strip off all the non relevant information for the server example program:

#include "EthernetNetIf.h"
#include "HTTPServer.h"
#include "RPCFunction.h"
#include "RPCVariable.h"
EthernetNetIf eth;
HTTPServer svr;
EthernetErr ethErr = eth.setup(75000);
svr.addHandler<RPCHandler>("/rpc");
svr.bind(80);	
main{
Net::poll();
}

I try to understand what is hapening and which does what. I make my own assumptions, please correct me if im wrong. thank you. i try to learn

#include "EthernetNetIf.h"

This library is responsable for the accepting and sending of data??

#include "HTTPServer.h"

this library is responsable for creating the socket and attaching him to a port nr??

EthernetNetIf eth;			//comes from the EthernetNetIf library

This makes a connection with the router to get a IP through the DHCP server. But i have the same assumtion for EthernetErr ethErr = eth.setup();???

HTTPServer svr;  		//comes from library HTTPServer.h

There is a socket created. It makes the socket a listening socket who is waiting on the initiative of a client.

EthernetErr ethErr = eth.setup();		comes from which library?

This makes a connection with the router to get a IP through the DHCP server. And gives back a value that says if this is succeeded or not. whats difference with EthernetNetIf eth; ??

Svr.bind(80);					//comes from library HTTPServer.h

The socket which was created in HTTPServer svr is now bind to port nr 80

    svr.addHandler<RPCHandler>("/rpc");		//comes from library HTTPServer.h

there is a handler added to the socketAPI, so now this socket understands what we want to do if we send him some RPChandlers (off course with the RPC librarys included)

Net::poll();					comes from which library?

The server checks in his receive buffer if there is something waiting there. This also executes the code he finds there(if he understands it)???? I assume this because this is the only call going on in the main, so this must do everything after the socket is created?

what I’m still missing is:

where is the socket accepting incoming connections?

Where is the communicating with the remote host with send, recv, write and read functions?

Thnx, this would help me a lot understanding whats happening