588 lines
23 KiB
C++
588 lines
23 KiB
C++
// This code slightly follows the conventions of, but is not derived from:
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// EHTERSHIELD_H library for Arduino etherShield
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// Copyright (c) 2008 Xing Yu. All right reserved. (this is LGPL v2.1)
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// It is however derived from the enc28j60 and ip code (which is GPL v2)
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// Author: Pascal Stang
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// Modified by: Guido Socher
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// DHCP code: Andrew Lindsay
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// Hence: GPL V2
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//
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// 2010-05-19 <jc@wippler.nl>
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//
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//
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// PIN Connections (Using Arduino UNO):
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// VCC - 3.3V
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// GND - GND
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// SCK - Pin 13
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// SO - Pin 12
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// SI - Pin 11
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// CS - Pin 8
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//
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#define __PROG_TYPES_COMPAT__
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#ifndef EtherCard_h
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#define EtherCard_h
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#if ARDUINO >= 100
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#include <Arduino.h> // Arduino 1.0
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#define WRITE_RESULT size_t
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#define WRITE_RETURN return 1;
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#else
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#include <WProgram.h> // Arduino 0022
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#define WRITE_RESULT void
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#define WRITE_RETURN
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#endif
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#include <avr/pgmspace.h>
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#include "enc28j60.h"
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#include "net.h"
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/** This type definition defines the structure of a UDP server event handler callback funtion */
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typedef void (*UdpServerCallback)(
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uint16_t dest_port, ///< Port the packet was sent to
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uint8_t src_ip[4], ///< IP address of the sender
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const char *data, ///< UDP payload data
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uint16_t len); ///< Length of the payload data
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/** This type definition defines the structure of a DHCP Option callback funtion */
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typedef void (*DhcpOptionCallback)(
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uint8_t option, ///< The option number
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const byte* data, ///< DHCP option data
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uint8_t len); ///< Length of the DHCP option data
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/** This structure describes the structure of memory used within the ENC28J60 network interface. */
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typedef struct {
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uint8_t count; ///< Number of allocated pages
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uint8_t first; ///< First allocated page
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uint8_t last; ///< Last allocated page
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} StashHeader;
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/** This class provides access to the memory within the ENC28J60 network interface. */
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class Stash : public /*Stream*/ Print, private StashHeader {
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uint8_t curr; //!< Current page
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uint8_t offs; //!< Current offset in page
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typedef struct {
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union {
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uint8_t bytes[64];
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uint16_t words[32];
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struct {
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StashHeader head;
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uint8_t filler[59];
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uint8_t tail;
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uint8_t next;
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};
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};
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uint8_t bnum;
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} Block;
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static uint8_t allocBlock ();
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static void freeBlock (uint8_t block);
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static uint8_t fetchByte (uint8_t blk, uint8_t off);
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static Block bufs[2];
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static uint8_t map[256/8];
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public:
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static void initMap (uint8_t last);
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static void load (uint8_t idx, uint8_t blk);
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static uint8_t freeCount ();
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Stash () : curr (0) { first = 0; }
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Stash (uint8_t fd) { open(fd); }
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uint8_t create ();
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uint8_t open (uint8_t blk);
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void save ();
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void release ();
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void put (char c);
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char get ();
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uint16_t size ();
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virtual WRITE_RESULT write(uint8_t b) { put(b); WRITE_RETURN }
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// virtual int available() {
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// if (curr != last)
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// return 1;
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// load(1, last);
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// return offs < bufs[1].tail;
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// }
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// virtual int read() {
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// return available() ? get() : -1;
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// }
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// virtual int peek() {
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// return available() ? bufs[1].bytes[offs] : -1;
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// }
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// virtual void flush() {
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// curr = last;
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// offs = 63;
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// }
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static void prepare (PGM_P fmt, ...);
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static uint16_t length ();
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static void extract (uint16_t offset, uint16_t count, void* buf);
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static void cleanup ();
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friend void dumpBlock (const char* msg, uint8_t idx); // optional
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friend void dumpStash (const char* msg, void* ptr); // optional
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};
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/** This class populates network send and receive buffers.
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*
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* This class provides formatted printing into memory. Users can use it to write into send buffers.
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*
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* Nota: PGM_P: is a pointer to a string in program space (defined in the source code)
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*
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* # Format string
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*
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* | Format | Parameter | Output
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* |--------|-------------|----------
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* | $D | uint16_t | Decimal representation
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* | $T ¤ | double | Decimal representation with 3 digits after decimal sign ([-]d.ddd)
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* | $H | uint16_t | Hexadecimal value of lsb (from 00 to ff)
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* | $L | long | Decimal representation
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* | $S | const char* | Copy null terminated string from main memory
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* | $F | PGM_P | Copy null terminated string from program space
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* | $E | byte* | Copy null terminated string from EEPROM space
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* | $$ | _none_ | '$'
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*
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* ¤ _Available only if FLOATEMIT is defined_
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*
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* # Examples
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* ~~~~~~~~~~~~~{.c}
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* uint16_t ddd = 123;
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* double ttt = 1.23;
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* uint16_t hhh = 0xa4;
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* long lll = 123456789;
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* char * sss;
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* char fff[] PROGMEM = "MyMemory";
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*
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* sss[0] = 'G';
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* sss[1] = 'P';
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* sss[2] = 'L';
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* sss[3] = 0;
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* buf.emit_p( PSTR("ddd=$D\n"), ddd ); // "ddd=123\n"
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* buf.emit_p( PSTR("ttt=$T\n"), ttt ); // "ttt=1.23\n" **TO CHECK**
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* buf.emit_p( PSTR("hhh=$H\n"), hhh ); // "hhh=a4\n"
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* buf.emit_p( PSTR("lll=$L\n"), lll ); // "lll=123456789\n"
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* buf.emit_p( PSTR("sss=$S\n"), sss ); // "sss=GPL\n"
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* buf.emit_p( PSTR("fff=$F\n"), fff ); // "fff=MyMemory\n"
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* ~~~~~~~~~~~~~
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*
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*/
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class BufferFiller : public Print {
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uint8_t *start; //!< Pointer to start of buffer
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uint8_t *ptr; //!< Pointer to cursor position
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public:
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/** @brief Empty constructor
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*/
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BufferFiller () {}
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/** @brief Constructor
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* @param buf Pointer to the ethernet data buffer
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*/
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BufferFiller (uint8_t* buf) : start (buf), ptr (buf) {}
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/** @brief Add formatted text to buffer
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* @param fmt Format string (see Class description)
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* @param ... parameters for format string
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*/
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void emit_p (PGM_P fmt, ...);
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/** @brief Add data to buffer from main memory
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* @param s Pointer to data
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* @param n Number of characters to copy
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*/
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void emit_raw (const char* s, uint16_t n) { memcpy(ptr, s, n); ptr += n; }
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/** @brief Add data to buffer from program space string
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* @param p Program space string pointer
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* @param n Number of characters to copy
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*/
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void emit_raw_p (PGM_P p, uint16_t n) { memcpy_P(ptr, p, n); ptr += n; }
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/** @brief Get pointer to start of buffer
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* @return <i>uint8_t*</i> Pointer to start of buffer
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*/
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uint8_t* buffer () const { return start; }
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/** @brief Get cursor position
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* @return <i>uint16_t</i> Cursor postion
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*/
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uint16_t position () const { return ptr - start; }
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/** @brief Write one byte to buffer
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* @param v Byte to add to buffer
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*/
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virtual WRITE_RESULT write (uint8_t v) { *ptr++ = v; WRITE_RETURN }
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};
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/** This class provides the main interface to a ENC28J60 based network interface card and is the class most users will use.
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* @note All TCP/IP client (outgoing) connections are made from source port in range 2816-3071. Do not use these source ports for other purposes.
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*/
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class EtherCard : public Ethernet {
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public:
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static uint8_t mymac[6]; ///< MAC address
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static uint8_t myip[4]; ///< IP address
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static uint8_t netmask[4]; ///< Netmask
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static uint8_t broadcastip[4]; ///< Subnet broadcast address
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static uint8_t gwip[4]; ///< Gateway
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static uint8_t dhcpip[4]; ///< DHCP server IP address
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static uint8_t dnsip[4]; ///< DNS server IP address
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static uint8_t hisip[4]; ///< DNS lookup result
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static uint16_t hisport; ///< TCP port to connect to (default 80)
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static bool using_dhcp; ///< True if using DHCP
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static bool persist_tcp_connection; ///< False to break connections on first packet received
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static int16_t delaycnt; ///< Counts number of cycles of packetLoop when no packet received - used to trigger periodic gateway ARP request
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// EtherCard.cpp
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/** @brief Initialise the network interface
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* @param size Size of data buffer
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* @param macaddr Hardware address to assign to the network interface (6 bytes)
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* @param csPin Arduino pin number connected to chip select. Default = 8
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* @return <i>uint8_t</i> Firmware version or zero on failure.
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*/
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static uint8_t begin (const uint16_t size, const uint8_t* macaddr,
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uint8_t csPin =8);
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/** @brief Configure network interface with static IP
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* @param my_ip IP address (4 bytes). 0 for no change.
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* @param gw_ip Gateway address (4 bytes). 0 for no change. Default = 0
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* @param dns_ip DNS address (4 bytes). 0 for no change. Default = 0
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* @param mask Subnet mask (4 bytes). 0 for no change. Default = 0
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* @return <i>bool</i> Returns true on success - actually always true
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*/
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static bool staticSetup (const uint8_t* my_ip,
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const uint8_t* gw_ip = 0,
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const uint8_t* dns_ip = 0,
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const uint8_t* mask = 0);
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// tcpip.cpp
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/** @brief Sends a UDP packet to the IP address of last processed received packet
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* @param data Pointer to data payload
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* @param len Size of data payload (max 220)
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* @param port Source IP port
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*/
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static void makeUdpReply (const char *data, uint8_t len, uint16_t port);
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/** @brief Parse received data
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* @param plen Size of data to parse (e.g. return value of packetReceive()).
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* @return <i>uint16_t</i> Offset of TCP payload data in data buffer or zero if packet processed
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* @note Data buffer is shared by receive and transmit functions
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* @note Only handles ARP and IP
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*/
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static uint16_t packetLoop (uint16_t plen);
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/** @brief Accept a TCP/IP connection
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* @param port IP port to accept on - do nothing if wrong port
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* @param plen Number of bytes in packet
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* @return <i>uint16_t</i> Offset within packet of TCP payload. Zero for no data.
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*/
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static uint16_t accept (uint16_t port, uint16_t plen);
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/** @brief Send a response to a HTTP request
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* @param dlen Size of the HTTP (TCP) payload
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*/
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static void httpServerReply (uint16_t dlen);
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/** @brief Send a response to a HTTP request
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* @param dlen Size of the HTTP (TCP) payload
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* @param flags TCP flags
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*/
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static void httpServerReply_with_flags (uint16_t dlen , uint8_t flags);
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/** @brief Acknowledge TCP message
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* @todo Is this / should this be private?
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*/
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static void httpServerReplyAck ();
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/** @brief Set the gateway address
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* @param gwipaddr Gateway address (4 bytes)
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*/
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static void setGwIp (const uint8_t *gwipaddr);
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/** @brief Updates the broadcast address based on current IP address and subnet mask
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*/
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static void updateBroadcastAddress();
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/** @brief Check if got gateway hardware address (ARP lookup)
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* @return <i>unit8_t</i> True if gateway found
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*/
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static uint8_t clientWaitingGw ();
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/** @brief Check if got gateway DNS address (ARP lookup)
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* @return <i>unit8_t</i> True if DNS found
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*/
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static uint8_t clientWaitingDns ();
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/** @brief Prepare a TCP request
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* @param result_cb Pointer to callback function that handles TCP result
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* @param datafill_cb Pointer to callback function that handles TCP data payload
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* @param port Remote TCP/IP port to connect to
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* @return <i>unit8_t</i> ID of TCP/IP session (0-7)
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* @note Return value provides id of the request to allow up to 7 concurrent requests
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*/
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static uint8_t clientTcpReq (uint8_t (*result_cb)(uint8_t,uint8_t,uint16_t,uint16_t),
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uint16_t (*datafill_cb)(uint8_t),uint16_t port);
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/** @brief Prepare HTTP request
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* @param urlbuf Pointer to c-string URL folder
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* @param urlbuf_varpart Pointer to c-string URL file
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* @param hoststr Pointer to c-string hostname
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* @param additionalheaderline Pointer to c-string with additional HTTP header info
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* @param callback Pointer to callback function to handle response
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* @note Request sent in main packetloop
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*/
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static void browseUrl (const char *urlbuf, const char *urlbuf_varpart,
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const char *hoststr, const char *additionalheaderline,
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void (*callback)(uint8_t,uint16_t,uint16_t));
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/** @brief Prepare HTTP request
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* @param urlbuf Pointer to c-string URL folder
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* @param urlbuf_varpart Pointer to c-string URL file
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* @param hoststr Pointer to c-string hostname
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* @param callback Pointer to callback function to handle response
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* @note Request sent in main packetloop
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*/
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static void browseUrl (const char *urlbuf, const char *urlbuf_varpart,
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const char *hoststr,
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void (*callback)(uint8_t,uint16_t,uint16_t));
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/** @brief Prepare HTTP post message
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* @param urlbuf Pointer to c-string URL folder
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* @param hoststr Pointer to c-string hostname
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* @param additionalheaderline Pointer to c-string with additional HTTP header info
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* @param postval Pointer to c-string HTML Post value
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* @param callback Pointer to callback function to handle response
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* @note Request sent in main packetloop
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*/
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static void httpPost (const char *urlbuf, const char *hoststr,
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const char *additionalheaderline, const char *postval,
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void (*callback)(uint8_t,uint16_t,uint16_t));
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/** @brief Send NTP request
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* @param ntpip IP address of NTP server
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* @param srcport IP port to send from
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*/
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static void ntpRequest (uint8_t *ntpip,uint8_t srcport);
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/** @brief Process network time protocol response
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* @param time Pointer to integer to hold result
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* @param dstport_l Destination port to expect response. Set to zero to accept on any port
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* @return <i>uint8_t</i> True (1) on success
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*/
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static uint8_t ntpProcessAnswer (uint32_t *time, uint8_t dstport_l);
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/** @brief Prepare a UDP message for transmission
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* @param sport Source port
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* @param dip Pointer to 4 byte destination IP address
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* @param dport Destination port
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*/
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static void udpPrepare (uint16_t sport, const uint8_t *dip, uint16_t dport);
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/** @brief Transmit UDP packet
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* @param len Size of payload
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*/
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static void udpTransmit (uint16_t len);
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/** @brief Sends a UDP packet
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* @param data Pointer to data
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* @param len Size of payload (maximum 220 octets / bytes)
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* @param sport Source port
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* @param dip Pointer to 4 byte destination IP address
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* @param dport Destination port
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*/
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static void sendUdp (const char *data, uint8_t len, uint16_t sport,
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const uint8_t *dip, uint16_t dport);
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/** @brief Resister the function to handle ping events
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* @param cb Pointer to function
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*/
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static void registerPingCallback (void (*cb)(uint8_t*));
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/** @brief Send ping
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* @param destip Ponter to 4 byte destination IP address
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*/
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static void clientIcmpRequest (const uint8_t *destip);
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/** @brief Check for ping response
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* @param ip_monitoredhost Pointer to 4 byte IP address of host to check
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* @return <i>uint8_t</i> True (1) if ping response from specified host
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*/
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static uint8_t packetLoopIcmpCheckReply (const uint8_t *ip_monitoredhost);
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/** @brief Send a wake on lan message
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* @param wolmac Pointer to 6 byte hardware (MAC) address of host to send message to
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*/
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static void sendWol (uint8_t *wolmac);
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// new stash-based API
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/** @brief Send TCP request
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*/
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static uint8_t tcpSend ();
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/** @brief Get TCP reply
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* @return <i>char*</i> Pointer to TCP reply payload. NULL if no data.
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*/
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static const char* tcpReply (uint8_t fd);
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/** @brief Configure TCP connections to be persistent or not
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* @param persist True to maintain TCP connection. False to finish TCP connection after first packet.
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*/
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static void persistTcpConnection(bool persist);
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//udpserver.cpp
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/** @brief Register function to handle incomint UDP events
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* @param callback Function to handle event
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* @param port Port to listen on
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*/
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static void udpServerListenOnPort(UdpServerCallback callback, uint16_t port);
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/** @brief Pause listing on UDP port
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* @brief port Port to pause
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*/
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static void udpServerPauseListenOnPort(uint16_t port);
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/** @brief Resume listing on UDP port
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* @brief port Port to pause
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*/
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static void udpServerResumeListenOnPort(uint16_t port);
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/** @brief Check if UDP server is listening on any ports
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* @return <i>bool</i> True if listening on any ports
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*/
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static bool udpServerListening(); //called by tcpip, in packetLoop
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/** @brief Passes packet to UDP Server
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* @param len Not used
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* @return <i>bool</i> True if packet processed
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*/
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static bool udpServerHasProcessedPacket(uint16_t len); //called by tcpip, in packetLoop
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// dhcp.cpp
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/** @brief Update DHCP state
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* @param len Length of received data packet
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*/
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static void DhcpStateMachine(uint16_t len);
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/** @brief Not implemented
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* @todo Implement dhcpStartTime or remove declaration
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*/
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static uint32_t dhcpStartTime ();
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/** @brief Not implemented
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* @todo Implement dhcpLeaseTime or remove declaration
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*/
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static uint32_t dhcpLeaseTime ();
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/** @brief Not implemented
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* @todo Implement dhcpLease or remove declaration
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*/
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static bool dhcpLease ();
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/** @brief Configure network interface with DHCP
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* @return <i>bool</i> True if DHCP successful
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* @note Blocks until DHCP complete or timeout after 60 seconds
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*/
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static bool dhcpSetup (const char *hname = NULL, bool fromRam =false);
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/** @brief Register a callback for a specific DHCP option number
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* @param option The option number to request from the DHCP server
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* @param callback The function to be call when the option is received
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*/
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static void dhcpAddOptionCallback(uint8_t option, DhcpOptionCallback callback);
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// dns.cpp
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/** @brief Perform DNS lookup
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* @param name Host name to lookup
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* @param fromRam Set true to look up cached name. Default = false
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* @return <i>bool</i> True on success.
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* @note Result is stored in <i>hisip</i> member
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|
*/
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static bool dnsLookup (const char* name, bool fromRam =false);
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|
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// webutil.cpp
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/** @brief Copies an IP address
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|
* @param dst Pointer to the 4 byte destination
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* @param src Pointer to the 4 byte source
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* @note There is no check of source or destination size. Ensure both are 4 bytes
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|
*/
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|
static void copyIp (uint8_t *dst, const uint8_t *src);
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|
|
|
/** @brief Copies a hardware address
|
|
* @param dst Pointer to the 6 byte destination
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|
* @param src Pointer to the 6 byte destination
|
|
* @note There is no check of source or destination size. Ensure both are 6 bytes
|
|
*/
|
|
static void copyMac (uint8_t *dst, const uint8_t *src);
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|
|
|
/** @brief Output to serial port in dotted decimal IP format
|
|
* @param buf Pointer to 4 byte IP address
|
|
* @note There is no check of source or destination size. Ensure both are 4 bytes
|
|
*/
|
|
static void printIp (const uint8_t *buf);
|
|
|
|
/** @brief Output message and IP address to serial port in dotted decimal IP format
|
|
* @param msg Pointer to null terminated string
|
|
* @param buf Pointer to 4 byte IP address
|
|
* @note There is no check of source or destination size. Ensure both are 4 bytes
|
|
*/
|
|
static void printIp (const char* msg, const uint8_t *buf);
|
|
|
|
/** @brief Output Flash String Helper and IP address to serial port in dotted decimal IP format
|
|
* @param ifsh Pointer to Flash String Helper
|
|
* @param buf Pointer to 4 byte IP address
|
|
* @note There is no check of source or destination size. Ensure both are 4 bytes
|
|
* @todo What is a FlashStringHelper?
|
|
*/
|
|
static void printIp (const __FlashStringHelper *ifsh, const uint8_t *buf);
|
|
|
|
/** @brief Search for a string of the form key=value in a string that looks like q?xyz=abc&uvw=defgh HTTP/1.1\\r\\n
|
|
* @param str Pointer to the null terminated string to search
|
|
* @param strbuf Pointer to buffer to hold null terminated result string
|
|
* @param maxlen Maximum length of result
|
|
* @param key Pointer to null terminated string holding the key to search for
|
|
* @return <i>unit_t</i> Length of the value. 0 if not found
|
|
* @note Ensure strbuf has memory allocated of at least maxlen + 1 (to accomodate result plus terminating null)
|
|
*/
|
|
static uint8_t findKeyVal(const char *str,char *strbuf,
|
|
uint8_t maxlen, const char *key);
|
|
|
|
/** @brief Decode a URL string e.g "hello%20joe" or "hello+joe" becomes "hello joe"
|
|
* @param urlbuf Pointer to the null terminated URL
|
|
* @note urlbuf is modified
|
|
*/
|
|
static void urlDecode(char *urlbuf);
|
|
|
|
/** @brief Encode a URL, replacing illegal charaters like ' '
|
|
* @param str Pointer to the null terminated string to encode
|
|
* @param urlbuf Pointer to a buffer to contain the null terminated encoded URL
|
|
* @note There must be enough space in urlbuf. In the worst case that is 3 times the length of str
|
|
*/
|
|
static void urlEncode(char *str,char *urlbuf);
|
|
|
|
/** @brief Convert an IP address from dotted decimal formated string to 4 bytes
|
|
* @param bytestr Pointer to the 4 byte array to store IP address
|
|
* @param str Pointer to string to parse
|
|
* @return <i>uint8_t</i> 0 on success
|
|
*/
|
|
static uint8_t parseIp(uint8_t *bytestr,char *str);
|
|
|
|
/** @brief Convert a byte array to a human readable display string
|
|
* @param resultstr Pointer to a buffer to hold the resulting null terminated string
|
|
* @param bytestr Pointer to the byte array containing the address to convert
|
|
* @param len Length of the array (4 for IP address, 6 for hardware (MAC) address)
|
|
* @param separator Delimiter character (typically '.' for IP address and ':' for hardware (MAC) address)
|
|
* @param base Base for numerical representation (typically 10 for IP address and 16 for hardware (MAC) address
|
|
*/
|
|
static void makeNetStr(char *resultstr,uint8_t *bytestr,uint8_t len,
|
|
char separator,uint8_t base);
|
|
};
|
|
|
|
extern EtherCard ether; //!< Global presentation of EtherCard class
|
|
|
|
#endif
|