добавил немного файлов для работы Ethernet

cores/arduino/Client.h

@@ -0,0 +1,42 @@
+/*
+  Client.h - Base class that provides Client
+  Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#pragma once
+
+#include "Stream.h"
+#include "IPAddress.h"
+
+class Client : public Stream {
+
+public:
+  virtual int connect(IPAddress ip, uint16_t port) =0;
+  virtual int connect(const char *host, uint16_t port) =0;
+  virtual size_t write(uint8_t) =0;
+  virtual size_t write(const uint8_t *buf, size_t size) =0;
+  virtual int available() = 0;
+  virtual int read() = 0;
+  virtual int read(uint8_t *buf, size_t size) = 0;
+  virtual int peek() = 0;
+  virtual void flush() = 0;
+  virtual void stop() = 0;
+  virtual uint8_t connected() = 0;
+  virtual operator bool() = 0;
+protected:
+  uint8_t* rawIPAddress(IPAddress& addr) { return addr.raw_address(); };
+};

cores/arduino/IPAddress.cpp

@@ -0,0 +1,367 @@
+/*
+  IPAddress.cpp - Base class that provides IPAddress
+  Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include "IPAddress.h"
+#include "Print.h"
+
+
+IPAddress::IPAddress() : IPAddress(IPv4) {}
+
+IPAddress::IPAddress(IPType ip_type)
+{
+    _type = ip_type;
+    memset(_address.bytes, 0, sizeof(_address.bytes));
+}
+
+IPAddress::IPAddress(uint8_t first_octet, uint8_t second_octet, uint8_t third_octet, uint8_t fourth_octet)
+{
+    _type = IPv4;
+    memset(_address.bytes, 0, sizeof(_address.bytes));
+    _address.bytes[IPADDRESS_V4_BYTES_INDEX] = first_octet;
+    _address.bytes[IPADDRESS_V4_BYTES_INDEX + 1] = second_octet;
+    _address.bytes[IPADDRESS_V4_BYTES_INDEX + 2] = third_octet;
+    _address.bytes[IPADDRESS_V4_BYTES_INDEX + 3] = fourth_octet;
+}
+
+IPAddress::IPAddress(uint8_t o1, uint8_t o2, uint8_t o3, uint8_t o4, uint8_t o5, uint8_t o6, uint8_t o7, uint8_t o8, uint8_t o9, uint8_t o10, uint8_t o11, uint8_t o12, uint8_t o13, uint8_t o14, uint8_t o15, uint8_t o16) {
+    _type = IPv6;
+    _address.bytes[0] = o1;
+    _address.bytes[1] = o2;
+    _address.bytes[2] = o3;
+    _address.bytes[3] = o4;
+    _address.bytes[4] = o5;
+    _address.bytes[5] = o6;
+    _address.bytes[6] = o7;
+    _address.bytes[7] = o8;
+    _address.bytes[8] = o9;
+    _address.bytes[9] = o10;
+    _address.bytes[10] = o11;
+    _address.bytes[11] = o12;
+    _address.bytes[12] = o13;
+    _address.bytes[13] = o14;
+    _address.bytes[14] = o15;
+    _address.bytes[15] = o16;
+}
+
+IPAddress::IPAddress(uint32_t address)
+{
+    // IPv4 only
+    _type = IPv4;
+    memset(_address.bytes, 0, sizeof(_address.bytes));
+    _address.dword[IPADDRESS_V4_DWORD_INDEX] = address;
+
+    // NOTE on conversion/comparison and uint32_t:
+    // These conversions are host platform dependent.
+    // There is a defined integer representation of IPv4 addresses,
+    // based on network byte order (will be the value on big endian systems),
+    // e.g. http://2398766798 is the same as http://142.250.70.206,
+    // However on little endian systems the octets 0x83, 0xFA, 0x46, 0xCE,
+    // in that order, will form the integer (uint32_t) 3460758158 .
+}
+
+IPAddress::IPAddress(const uint8_t *address) : IPAddress(IPv4, address) {}
+
+IPAddress::IPAddress(IPType ip_type, const uint8_t *address)
+{
+    _type = ip_type;
+    if (ip_type == IPv4) {
+        memset(_address.bytes, 0, sizeof(_address.bytes));
+        memcpy(&_address.bytes[IPADDRESS_V4_BYTES_INDEX], address, sizeof(uint32_t));
+    } else {
+        memcpy(_address.bytes, address, sizeof(_address.bytes));
+    }
+}
+
+IPAddress::IPAddress(const char *address)
+{
+    fromString(address);
+}
+
+String IPAddress::toString4() const
+{
+    char szRet[16];
+    snprintf(szRet, sizeof(szRet), "%u.%u.%u.%u", _address.bytes[IPADDRESS_V4_BYTES_INDEX], _address.bytes[IPADDRESS_V4_BYTES_INDEX + 1], _address.bytes[IPADDRESS_V4_BYTES_INDEX + 2], _address.bytes[IPADDRESS_V4_BYTES_INDEX + 3]);
+    return String(szRet);
+}
+
+String IPAddress::toString6() const
+{
+    char szRet[40];
+    snprintf(szRet, sizeof(szRet), "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x",
+            _address.bytes[0], _address.bytes[1], _address.bytes[2], _address.bytes[3],
+            _address.bytes[4], _address.bytes[5], _address.bytes[6], _address.bytes[7],
+            _address.bytes[8], _address.bytes[9], _address.bytes[10], _address.bytes[11],
+            _address.bytes[12], _address.bytes[13], _address.bytes[14], _address.bytes[15]);
+    return String(szRet);
+}
+
+String IPAddress::toString() const
+{
+    if (_type == IPv4) {
+        return toString4();
+    } else {
+        return toString6();
+    }
+}
+
+bool IPAddress::fromString(const char *address) {
+    if (!fromString4(address)) {
+        return fromString6(address);
+    }
+    return true;
+}
+
+bool IPAddress::fromString4(const char *address)
+{
+    // TODO: add support for "a", "a.b", "a.b.c" formats
+
+    int16_t acc = -1; // Accumulator
+    uint8_t dots = 0;
+
+    memset(_address.bytes, 0, sizeof(_address.bytes));
+    while (*address)
+    {
+        char c = *address++;
+        if (c >= '0' && c <= '9')
+        {
+            acc = (acc < 0) ? (c - '0') : acc * 10 + (c - '0');
+            if (acc > 255) {
+                // Value out of [0..255] range
+                return false;
+            }
+        }
+        else if (c == '.')
+        {
+            if (dots == 3) {
+                // Too many dots (there must be 3 dots)
+                return false;
+            }
+            if (acc < 0) {
+                /* No value between dots, e.g. '1..' */
+                return false;
+            }
+            _address.bytes[IPADDRESS_V4_BYTES_INDEX + dots++] = acc;
+            acc = -1;
+        }
+        else
+        {
+            // Invalid char
+            return false;
+        }
+    }
+
+    if (dots != 3) {
+        // Too few dots (there must be 3 dots)
+        return false;
+    }
+    if (acc < 0) {
+        /* No value between dots, e.g. '1..' */
+        return false;
+    }
+    _address.bytes[IPADDRESS_V4_BYTES_INDEX + 3] = acc;
+    _type = IPv4;
+    return true;
+}
+
+bool IPAddress::fromString6(const char *address) {
+    uint32_t acc = 0; // Accumulator
+    int colons = 0, double_colons = -1;
+
+    while (*address)
+    {
+        char c = tolower(*address++);
+        if (isalnum(c) && c <= 'f') {
+            if (c >= 'a')
+                c -= 'a' - '0' - 10;
+            acc = acc * 16 + (c - '0');
+            if (acc > 0xffff)
+                // Value out of range
+                return false;
+        }
+        else if (c == ':') {
+            if (*address == ':') {
+                if (double_colons >= 0) {
+                    // :: allowed once
+                    return false;
+                }
+                if (*address != '\0' && *(address + 1) == ':') {
+                    // ::: not allowed
+                    return false;
+                }
+                // remember location
+                double_colons = colons + !!acc;
+                address++;
+            } else if (*address == '\0') {
+                // can't end with a single colon
+                return false;
+            }
+            if (colons == 7)
+                // too many separators
+                return false;
+            _address.bytes[colons * 2] = acc >> 8;
+            _address.bytes[colons * 2 + 1] = acc & 0xff;
+            colons++;
+            acc = 0;
+        }
+        else
+            // Invalid char
+            return false;
+    }
+
+    if (double_colons == -1 && colons != 7) {
+        // Too few separators
+        return false;
+    }
+    if (double_colons > -1 && colons > 6) {
+        // Too many segments (double colon must be at least one zero field)
+        return false;
+    }
+    _address.bytes[colons * 2] = acc >> 8;
+    _address.bytes[colons * 2 + 1] = acc & 0xff;
+    colons++;
+
+    if (double_colons != -1) {
+        for (int i = colons * 2 - double_colons * 2 - 1; i >= 0; i--)
+            _address.bytes[16 - colons * 2 + double_colons * 2 + i] = _address.bytes[double_colons * 2 + i];
+        for (int i = double_colons * 2; i < 16 - colons * 2 + double_colons * 2; i++)
+            _address.bytes[i] = 0;
+    }
+
+    _type = IPv6;
+    return true;
+}
+
+IPAddress& IPAddress::operator=(const uint8_t *address)
+{
+    // IPv4 only conversion from byte pointer
+    _type = IPv4;
+    memset(_address.bytes, 0, sizeof(_address.bytes));
+    memcpy(&_address.bytes[IPADDRESS_V4_BYTES_INDEX], address, sizeof(uint32_t));
+    return *this;
+}
+
+IPAddress& IPAddress::operator=(const char *address)
+{
+    fromString(address);
+    return *this;
+}
+
+IPAddress& IPAddress::operator=(uint32_t address)
+{
+    // IPv4 conversion
+    // See note on conversion/comparison and uint32_t
+    _type = IPv4;
+    memset(_address.bytes, 0, sizeof(_address.bytes));
+    _address.dword[IPADDRESS_V4_DWORD_INDEX] = address;
+    return *this;
+}
+
+bool IPAddress::operator==(const IPAddress& addr) const {
+    return (addr._type == _type)
+        && (memcmp(addr._address.bytes, _address.bytes, sizeof(_address.bytes)) == 0);
+}
+
+bool IPAddress::operator==(const uint8_t* addr) const
+{
+    // IPv4 only comparison to byte pointer
+    // Can't support IPv6 as we know our type, but not the length of the pointer
+    return _type == IPv4 && memcmp(addr, &_address.bytes[IPADDRESS_V4_BYTES_INDEX], sizeof(uint32_t)) == 0;
+}
+
+uint8_t IPAddress::operator[](int index) const {
+    if (_type == IPv4) {
+        return _address.bytes[IPADDRESS_V4_BYTES_INDEX + index];
+    }
+    return _address.bytes[index];
+}
+
+uint8_t& IPAddress::operator[](int index) {
+    if (_type == IPv4) {
+        return _address.bytes[IPADDRESS_V4_BYTES_INDEX + index];
+    }
+    return _address.bytes[index];
+}
+
+size_t IPAddress::printTo(Print& p) const
+{
+    size_t n = 0;
+
+    if (_type == IPv6) {
+        // IPv6 IETF canonical format: compress left-most longest run of two or more zero fields, lower case
+        int8_t longest_start = -1;
+        int8_t longest_length = 1;
+        int8_t current_start = -1;
+        int8_t current_length = 0;
+        for (int8_t f = 0; f < 8; f++) {
+            if (_address.bytes[f * 2] == 0 && _address.bytes[f * 2 + 1] == 0) {
+                if (current_start == -1) {
+                    current_start = f;
+                    current_length = 1;
+                } else {
+                    current_length++;
+                }
+                if (current_length > longest_length) {
+                    longest_start = current_start;
+                    longest_length = current_length;
+                }
+            } else {
+                current_start = -1;
+            }
+        }
+        for (int f = 0; f < 8; f++) {
+            if (f < longest_start || f >= longest_start + longest_length) {
+                uint8_t c1 = _address.bytes[f * 2] >> 4;
+                uint8_t c2 = _address.bytes[f * 2] & 0xf;
+                uint8_t c3 = _address.bytes[f * 2 + 1] >> 4;
+                uint8_t c4 = _address.bytes[f * 2 + 1] & 0xf;
+                if (c1 > 0) {
+                    n += p.print((char)(c1 < 10 ? '0' + c1 : 'a' + c1 - 10));
+                }
+                if (c1 > 0 || c2 > 0) {
+                    n += p.print((char)(c2 < 10 ? '0' + c2 : 'a' + c2 - 10));
+                }
+                if (c1 > 0 || c2 > 0 || c3 > 0) {
+                    n += p.print((char)(c3 < 10 ? '0' + c3 : 'a' + c3 - 10));
+                }
+                n += p.print((char)(c4 < 10 ? '0' + c4 : 'a' + c4 - 10));
+                if (f < 7) {
+                    n += p.print(':');
+                }
+            } else if (f == longest_start) {
+                if (longest_start == 0) {
+                    n += p.print(':');
+                }
+                n += p.print(':');
+            }
+        }
+        return n;
+    }
+
+    // IPv4
+    for (int i =0; i < 3; i++)
+    {
+        n += p.print(_address.bytes[IPADDRESS_V4_BYTES_INDEX + i], DEC);
+        n += p.print('.');
+    }
+    n += p.print(_address.bytes[IPADDRESS_V4_BYTES_INDEX + 3], DEC);
+    return n;
+}
+
+const IPAddress IN6ADDR_ANY(IPv6);
+const IPAddress INADDR_NONE(0,0,0,0);

cores/arduino/IPAddress.h

@@ -0,0 +1,117 @@
+/*
+  IPAddress.h - Base class that provides IPAddress
+  Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#pragma once
+
+#include <stdint.h>
+#include "Printable.h"
+#include "WString.h"
+
+#define IPADDRESS_V4_BYTES_INDEX 12
+#define IPADDRESS_V4_DWORD_INDEX 3
+
+// forward declarations of global name space friend classes
+class EthernetClass;
+class DhcpClass;
+class DNSClient;
+
+// A class to make it easier to handle and pass around IP addresses
+
+enum IPType {
+    IPv4,
+    IPv6
+};
+
+class IPAddress : public Printable {
+private:
+    union {
+        uint8_t bytes[16];
+        uint32_t dword[4];
+    } _address;
+    IPType _type;
+
+    // Access the raw byte array containing the address.  Because this returns a pointer
+    // to the internal structure rather than a copy of the address this function should only
+    // be used when you know that the usage of the returned uint8_t* will be transient and not
+    // stored.
+    uint8_t* raw_address() { return _type == IPv4 ? &_address.bytes[IPADDRESS_V4_BYTES_INDEX] : _address.bytes; }
+
+public:
+    // Constructors
+
+    // Default IPv4
+    IPAddress();
+    IPAddress(IPType ip_type);
+    IPAddress(uint8_t first_octet, uint8_t second_octet, uint8_t third_octet, uint8_t fourth_octet);
+    IPAddress(uint8_t o1, uint8_t o2, uint8_t o3, uint8_t o4, uint8_t o5, uint8_t o6, uint8_t o7, uint8_t o8, uint8_t o9, uint8_t o10, uint8_t o11, uint8_t o12, uint8_t o13, uint8_t o14, uint8_t o15, uint8_t o16);
+     // IPv4; see implementation note
+    IPAddress(uint32_t address);
+     // Default IPv4
+    IPAddress(const uint8_t *address);
+    IPAddress(IPType ip_type, const uint8_t *address);
+    // If IPv4 fails tries IPv6 see fromString function
+    IPAddress(const char *address);
+
+    bool fromString(const char *address);
+    bool fromString(const String &address) { return fromString(address.c_str()); }
+
+    // Overloaded cast operator to allow IPAddress objects to be used where a uint32_t is expected
+    // NOTE: IPv4 only; see implementation note
+    operator uint32_t() const { return _type == IPv4 ? _address.dword[IPADDRESS_V4_DWORD_INDEX] : 0; };
+
+    bool operator==(const IPAddress& addr) const;
+    bool operator!=(const IPAddress& addr) const { return !(*this == addr); };
+
+    // NOTE: IPv4 only; we don't know the length of the pointer
+    bool operator==(const uint8_t* addr) const;
+
+    // Overloaded index operator to allow getting and setting individual octets of the address
+    uint8_t operator[](int index) const;
+    uint8_t& operator[](int index);
+
+    // Overloaded copy operators to allow initialisation of IPAddress objects from other types
+    // NOTE: IPv4 only
+    IPAddress& operator=(const uint8_t *address);
+    // NOTE: IPv4 only; see implementation note
+    IPAddress& operator=(uint32_t address);
+    // If IPv4 fails tries IPv6 see fromString function
+    IPAddress& operator=(const char *address);
+
+    virtual size_t printTo(Print& p) const;
+    String toString() const;
+
+    IPType type() const { return _type; }
+
+    friend class UDP;
+    friend class Client;
+    friend class Server;
+    
+    friend ::EthernetClass;
+    friend ::DhcpClass;
+    friend ::DNSClient;
+
+protected:
+    bool fromString4(const char *address);
+    bool fromString6(const char *address);
+    String toString4() const;
+    String toString6() const;
+};
+
+extern const IPAddress IN6ADDR_ANY;
+extern const IPAddress INADDR_NONE;

cores/arduino/Print.cpp

@@ -53,6 +53,7 @@ size_t Print::print(const __FlashStringHelper *ifsh)
     else break;
   }
   return n;
+  // return print(reinterpret_cast<const char *>(ifsh));
 }
 
 size_t Print::print(const String &s)
@@ -107,6 +108,28 @@ size_t Print::print(unsigned long n, int base)
   else return printNumber(n, base);
 }
 
+size_t Print::print(long long n, int base)
+{
+  if (base == 0) {
+    return write(n);
+  } else if (base == 10) {
+    if (n < 0) {
+      int t = print('-');
+      n = -n;
+      return printULLNumber(n, 10) + t;
+    }
+    return printULLNumber(n, 10);
+  } else {
+    return printULLNumber(n, base);
+  }
+}
+
+size_t Print::print(unsigned long long n, int base)
+{
+  if (base == 0) return write(n);
+  else return printULLNumber(n, base);
+}
+
 size_t Print::print(double n, int digits)
 {
   return printFloat(n, digits);
@@ -185,6 +208,20 @@ size_t Print::println(unsigned long num, int base)
   return n;
 }
 
+size_t Print::println(long long num, int base)
+{
+  size_t n = print(num, base);
+  n += println();
+  return n;
+}
+
+size_t Print::println(unsigned long long num, int base)
+{
+  size_t n = print(num, base);
+  n += println();
+  return n;
+}
+
 size_t Print::println(double num, int digits)
 {
   size_t n = print(num, digits);
@@ -221,6 +258,67 @@ size_t Print::printNumber(unsigned long n, uint8_t base)
   return write(str);
 }
 
+
+// FAST IMPLEMENTATION FOR ULL
+size_t Print::printULLNumber(unsigned long long n64, uint8_t base)
+{
+  // if limited to base 10 and 16 the bufsize can be 20
+  char buf[64];
+  uint8_t i = 0;
+  uint8_t innerLoops = 0;
+
+  // Special case workaround https://github.com/arduino/ArduinoCore-API/issues/178
+  if (n64 == 0) {
+    write('0');
+    return 1;
+  }
+
+  // prevent crash if called with base == 1
+  if (base < 2) base = 10;
+
+  // process chunks that fit in "16 bit math".
+  uint16_t top = 0xFFFF / base;
+  uint16_t th16 = 1;
+  while (th16 < top)
+  {
+    th16 *= base;
+    innerLoops++;
+  }
+
+  while (n64 > th16)
+  {
+    // 64 bit math part
+    uint64_t q = n64 / th16;
+    uint16_t r = n64 - q*th16;
+    n64 = q;
+
+    // 16 bit math loop to do remainder. (note buffer is filled reverse)
+    for (uint8_t j=0; j < innerLoops; j++)
+    {
+      uint16_t qq = r/base;
+      buf[i++] = r - qq*base;
+      r = qq;
+    }
+  }
+
+  uint16_t n16 = n64;
+  while (n16 > 0)
+  {
+    uint16_t qq = n16/base;
+    buf[i++] = n16 - qq*base;
+    n16 = qq;
+  }
+
+  size_t bytes = i;
+  for (; i > 0; i--)
+    write((char) (buf[i - 1] < 10 ?
+    '0' + buf[i - 1] :
+    'A' + buf[i - 1] - 10));
+
+  return bytes;
+}
+
+
 size_t Print::printFloat(double number, uint8_t digits) 
 { 
   size_t n = 0;

cores/arduino/Print.h

@@ -35,11 +35,13 @@
 #endif
 #define BIN 2
 
+
 class Print
 {
   private:
     int write_error;
     size_t printNumber(unsigned long, uint8_t);
+    size_t printULLNumber(unsigned long long, uint8_t);
     size_t printFloat(double, uint8_t);
   protected:
     void setWriteError(int err = 1) { write_error = err; }
@@ -55,7 +57,7 @@ class Print
       if (str == NULL) return 0;
       return write((const uint8_t *)str, strlen(str));
     } 
-    size_t write(const uint8_t *buffer, size_t size); 
+    virtual size_t write(const uint8_t *buffer, size_t size); 
     size_t write(const char *buffer, size_t size) 
     {
       return write((const uint8_t *)buffer, size);
@@ -74,6 +76,8 @@ class Print
     size_t print(unsigned int, int = DEC);
     size_t print(long, int = DEC);
     size_t print(unsigned long, int = DEC);
+    size_t print(long long, int = DEC);
+    size_t print(unsigned long long, int = DEC);
     size_t print(double, int = 2);
     size_t print(const Printable&);
 
@@ -86,6 +90,8 @@ class Print
     size_t println(unsigned int, int = DEC);
     size_t println(long, int = DEC);
     size_t println(unsigned long, int = DEC);
+    size_t println(long long, int = DEC);
+    size_t println(unsigned long long, int = DEC);
     size_t println(double, int = 2);
     size_t println(const Printable&);
     size_t println(void);

cores/arduino/Server.h

@@ -0,0 +1,27 @@
+/*
+  Server.h - Base class that provides Server
+  Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#pragma once
+
+#include "Print.h"
+
+class Server : public Print {
+  public:
+    virtual void begin() = 0;
+};

cores/arduino/Udp.h

@@ -0,0 +1,88 @@
+/*
+ *  Udp.cpp: Library to send/receive UDP packets.
+ *
+ * NOTE: UDP is fast, but has some important limitations (thanks to Warren Gray for mentioning these)
+ * 1) UDP does not guarantee the order in which assembled UDP packets are received. This
+ * might not happen often in practice, but in larger network topologies, a UDP
+ * packet can be received out of sequence. 
+ * 2) UDP does not guard against lost packets - so packets *can* disappear without the sender being
+ * aware of it. Again, this may not be a concern in practice on small local networks.
+ * For more information, see http://www.cafeaulait.org/course/week12/35.html
+ *
+ * MIT License:
+ * Copyright (c) 2008 Bjoern Hartmann
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * bjoern@cs.stanford.edu 12/30/2008
+ */
+
+#pragma once
+
+#include "Stream.h"
+#include "IPAddress.h"
+
+
+class UDP : public Stream {
+
+public:
+  virtual uint8_t begin(uint16_t) =0;  // initialize, start listening on specified port. Returns 1 if successful, 0 if there are no sockets available to use
+  virtual uint8_t beginMulticast(IPAddress, uint16_t) { return 0; }  // initialize, start listening on specified multicast IP address and port. Returns 1 if successful, 0 on failure
+  virtual void stop() =0;  // Finish with the UDP socket
+
+  // Sending UDP packets
+  
+  // Start building up a packet to send to the remote host specified 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) =0;
+  // Start building up a packet to send to the remote host specified 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) =0;
+  // Finish off this packet and send it
+  // Returns 1 if the packet was sent successfully, 0 if there was an error
+  virtual int endPacket() =0;
+  // Write a single byte into the packet
+  virtual size_t write(uint8_t) =0;
+  // Write size bytes from buffer into the packet
+  virtual size_t write(const uint8_t *buffer, size_t size) =0;
+
+  // 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() =0;
+  // Number of bytes remaining in the current packet
+  virtual int available() =0;
+  // Read a single byte from the current packet
+  virtual int read() =0;
+  // 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) =0;
+  // 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) =0;
+  // Return the next byte from the current packet without moving on to the next byte
+  virtual int peek() =0;
+  virtual void flush() =0;	// Finish reading the current packet
+
+  // Return the IP address of the host who sent the current incoming packet
+  virtual IPAddress remoteIP() =0;
+  // Return the port of the host who sent the current incoming packet
+  virtual uint16_t remotePort() =0;
+protected:
+  uint8_t* rawIPAddress(IPAddress& addr) { return addr.raw_address(); };
+};
+