#include <EtherCard.h>

// ethernet interface ip address
static byte myip[] = { 192,168,0,50 };
// gateway ip address
static byte gwip[] = { 192,168,0,1 };
// ethernet mac address - must be unique on your network
static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31 };

byte Ethernet::buffer[500];      //??????
BufferFiller bfill;                     //???????

void setup () {
 if (ether.begin(sizeof Ethernet::buffer, mymac) == 0)
   Serial.println( "Failed to access Ethernet controller");
 ether.staticSetup(myip);
}

static word homePage() {
 long t = millis() / 1000;
 word h = t / 3600;
 byte m = (t / 60) % 60;
 byte s = t % 60;
 bfill = ether.tcpOffset();                         //???????
 bfill.emit_p(PSTR(                                 //???????
   "HTTP/1.0 200 OK\r\n"
   "Content-Type: text/html\r\n"
   "Pragma: no-cache\r\n"
   "\r\n"
   "<meta http-equiv='refresh' content='1'/>"
   "<title>RBBB server</title>"
   "<h1>$D$D:$D$D:$D$D</h1>"),
     h/10, h%10, m/10, m%10, s/10, s%10);                //???????

 return bfill.position();                                           //???????
}

void loop () {
 word len = ether.packetReceive();
 word pos = ether.packetLoop(len);
 
 if (pos)  // check if valid tcp data is received
   ether.httpServerReply(homePage()); // send web page data
}