flaneth

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
/* flaneth - flash and ethernet - dartboard mod
 * version 0.1 date 2008-11-09
 * Copyright (C) 2007-2008 Stefan Schuermans <stefan@schuermans.info>
 * Copyleft: GNU public license V2 - http://www.gnu.org/copyleft/gpl.html
 * a BlinkenArea project - http://www.blinkenarea.org/
 */
#include "config.h"
#include "checksum.h"
#include "dart.h"
#include "debug.h"
#include "dhcp.h"
#include "ethernet.h"
#include "ip.h"
#include "macros.h"
#include "nethelp.h"
#include "udp.h"
// some kind of "token bucket" for UDP echo
#define UdpEchoTicks 10 // allowed rate of UDP echo replies (in 200ms steps)
unsigned char UdpEchoTickCnt = 0; // tick counter
#define UdpEchoReliesMax 3 // maximum value for UdpEchoReplies
unsigned char UdpEchoReplies = 0; // number of UDP echo replies that may be sent at the moment
// tick procedure - call every 200ms
void UdpTick200( void ) // (extern)
{
  // count ticks
  UdpEchoTickCnt++;
  // time to allow one reply more
  if( UdpEchoTickCnt >= UdpEchoTicks )
  {
    UdpEchoTickCnt = 0;
    // increase reply count if not at maximum
    if( UdpEchoReplies < UdpEchoReliesMax )
      UdpEchoReplies++;
  }
}
// process a received UDP echo packet
static void UdpEchoRecv( unsigned char * pData, unsigned short Length )
{
  struct UdpPacket * pUdpPack;
  // convert pointer to UDP packet
  // (this saves us from always casting pData)
  pUdpPack = (struct UdpPacket *)pData;
  // source port is UDP echo port
  if( pUdpPack->UdpHdr.SrcPort == htons( 7 ) )
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX