WiFiEspUdp.h

/*--------------------------------------------------------------------
This file is part of the Arduino WiFiEsp library.

The Arduino WiFiEsp library is free software: you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

The Arduino WiFiEsp library is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with The Arduino WiFiEsp library.  If not, see
<http://www.gnu.org/licenses/>.
--------------------------------------------------------------------*/

#ifndef WiFiEspUdp_h
#define WiFiEspUdp_h

#include <Udp.h>

#define UDP_TX_PACKET_MAX_SIZE 24

class WiFiEspUDP : public UDP {
private:
  uint8_t _sock;  // socket ID for Wiz5100
  uint16_t _port; // local port to listen on
  
  
  uint16_t _remotePort;
  char _remoteHost[30];
  

public:
  WiFiEspUDP();  // Constructor

  virtual uint8_t begin(uint16_t);	// initialize, start listening on specified port. Returns 1 if successful, 0 if there are no sockets available to use
  virtual void stop();  // Finish with the UDP socket

  // Sending UDP packets

  // Start building up a packet to send to the remote host specific in ip and port
  // Returns 1 if successful, 0 if there was a problem with the supplied IP address or port
  virtual int beginPacket(IPAddress ip, uint16_t port);

  // Start building up a packet to send to the remote host specific in host and port
  // Returns 1 if successful, 0 if there was a problem resolving the hostname or port
  virtual int beginPacket(const char *host, uint16_t port);

  // Finish off this packet and send it
  // Returns 1 if the packet was sent successfully, 0 if there was an error
  virtual int endPacket();

  // Write a single byte into the packet
  virtual size_t write(uint8_t);

  // Write size bytes from buffer into the packet
  virtual size_t write(const uint8_t *buffer, size_t size);

  using Print::write;

  // Start processing the next available incoming packet
  // Returns the size of the packet in bytes, or 0 if no packets are available
  virtual int parsePacket();

  // Number of bytes remaining in the current packet
  virtual int available();

  // Read a single byte from the current packet
  virtual int read();

  // Read up to len bytes from the current packet and place them into buffer
  // Returns the number of bytes read, or 0 if none are available
  virtual int read(unsigned char* buffer, size_t len);

  // Read up to len characters from the current packet and place them into buffer
  // Returns the number of characters read, or 0 if none are available
  virtual int read(char* buffer, size_t len) { return read((unsigned char*)buffer, len); };

  // Return the next byte from the current packet without moving on to the next byte
  virtual int peek();

  virtual void flush();	// Finish reading the current packet

  // Return the IP address of the host who sent the current incoming packet
  virtual IPAddress remoteIP();

  // Return the port of the host who sent the current incoming packet
  virtual uint16_t remotePort();


  friend class WiFiEspServer;
};

#endif