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148 lines
2.7 KiB
148 lines
2.7 KiB
/*
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EthernetServerStream.h
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Copyright (C) 2017 Marc Josef Pees. All rights reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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See file LICENSE.txt for further informations on licensing terms.
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Last updated July 10th, 2017
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*/
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#ifndef ETHERNETSERVERSTREAM_H
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#define ETHERNETSERVERSTREAM_H
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#include <inttypes.h>
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#include <Stream.h>
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#include <Ethernet.h>
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//#define SERIAL_DEBUG
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#include "firmataDebug.h"
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class EthernetServerStream : public Stream
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{
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public:
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EthernetServerStream(IPAddress localip, uint16_t port);
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int available();
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int read();
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int peek();
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void flush();
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size_t write(uint8_t);
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void maintain(IPAddress localip);
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private:
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EthernetClient client;
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IPAddress localip;
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uint16_t port;
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bool connected;
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bool maintain();
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void stop();
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protected:
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EthernetServer server = EthernetServer(3030);
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bool listening = false;
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bool connect_client();
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};
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/*
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* EthernetServerStream.cpp
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* Copied here as a hack to linker issues with 3rd party board packages that don't properly
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* implement the Arduino network APIs.
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*/
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EthernetServerStream::EthernetServerStream(IPAddress localip, uint16_t port)
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: localip(localip),
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port(port),
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connected(false)
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{
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}
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bool EthernetServerStream::connect_client()
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{
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if ( connected )
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{
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if ( client && client.connected() ) return true;
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stop();
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}
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EthernetClient newClient = server.available();
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if ( !newClient ) return false;
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client = newClient;
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connected = true;
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DEBUG_PRINTLN("Connected");
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return true;
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}
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int
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EthernetServerStream::available()
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{
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return maintain() ? client.available() : 0;
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}
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int
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EthernetServerStream::read()
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{
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return maintain() ? client.read() : -1;
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}
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int
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EthernetServerStream::peek()
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{
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return maintain() ? client.peek() : -1;
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}
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void EthernetServerStream::flush()
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{
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if (maintain())
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client.flush();
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}
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size_t
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EthernetServerStream::write(uint8_t c)
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{
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return maintain() ? client.write(c) : 0;
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}
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void
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EthernetServerStream::maintain(IPAddress localip)
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{
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// ensure the local IP is updated in the case that it is changed by the DHCP server
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if (this->localip != localip) {
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this->localip = localip;
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if (connected)
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stop();
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}
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}
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void
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EthernetServerStream::stop()
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{
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if(client)
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{
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client.stop();
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}
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connected = false;
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}
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bool
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EthernetServerStream::maintain()
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{
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if (connect_client()) return true;
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stop();
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if(!listening)
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{
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server = EthernetServer(port);
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server.begin();
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listening = true;
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}
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return false;
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}
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#endif /* ETHERNETSERVERSTREAM_H */
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