reactos/lib/drivers/ip/network/routines.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS TCP/IP protocol driver
   4  * FILE:        tcpip/routines.c
   5  * PURPOSE:     Common routines
   6  * PROGRAMMERS: Casper S. Hornstrup (chorns@users.sourceforge.net)
   7  * REVISIONS:
   8  *   CSH 01/08-2000 Created
   9  */
  10
  11 #include "precomp.h"
  12
  13 static UINT RandomNumber = 0x12345678;
  14
  15
  16 UINT Random(
  17     VOID)
  18 /*
  19  * FUNCTION: Returns a pseudo random number
  20  * RETURNS:
  21  *     Pseudo random number
  22  */
  23 {
  24     RandomNumber ^= 0x78563412;
  25
  26     return RandomNumber;
  27 }
  28
  29 #if DBG
  30 static VOID DisplayIPHeader(
  31     PCHAR Header,
  32     UINT Length)
  33 {
  34     /* FIXME: IPv4 only */
  35     PIPv4_HEADER IPHeader = (PIPv4_HEADER)Header;
  36
  37     DbgPrint("IPv4 header:\n");
  38     DbgPrint("VerIHL: 0x%x (version 0x%x, length %d 32-bit words)\n",
  39       IPHeader->VerIHL, (IPHeader->VerIHL & 0xF0) >> 4, IPHeader->VerIHL & 0x0F);
  40     DbgPrint("  Tos: %d\n", IPHeader->Tos);
  41     DbgPrint("  TotalLength: %d\n", WN2H(IPHeader->TotalLength));
  42     DbgPrint("  Id: %d\n", WN2H(IPHeader->Id));
  43     DbgPrint("  FlagsFragOfs: 0x%x (offset 0x%x)\n", WN2H(IPHeader->FlagsFragOfs), WN2H(IPHeader->FlagsFragOfs) & IPv4_FRAGOFS_MASK);
  44     if ((WN2H(IPHeader->FlagsFragOfs) & IPv4_DF_MASK) > 0) DbgPrint("    IPv4_DF - Don't fragment\n");
  45     if ((WN2H(IPHeader->FlagsFragOfs) & IPv4_MF_MASK) > 0) DbgPrint("    IPv4_MF - More fragments\n");
  46     DbgPrint("  Ttl: %d\n", IPHeader->Ttl);
  47     DbgPrint("  Protocol: %d\n", IPHeader->Protocol);
  48     DbgPrint("  Checksum: 0x%x\n", WN2H(IPHeader->Checksum));
  49     DbgPrint("  SrcAddr: %d.%d.%d.%d\n",
  50       ((IPHeader->SrcAddr >> 0) & 0xFF), ((IPHeader->SrcAddr >> 8) & 0xFF),
  51       ((IPHeader->SrcAddr >> 16) & 0xFF), ((IPHeader->SrcAddr >> 24) & 0xFF));
  52     DbgPrint("  DstAddr: %d.%d.%d.%d\n",
  53       ((IPHeader->DstAddr >> 0) & 0xFF), ((IPHeader->DstAddr >> 8) & 0xFF),
  54       ((IPHeader->DstAddr >> 16) & 0xFF), ((IPHeader->DstAddr >> 24) & 0xFF));
  55 }
  56
  57 #endif
  58
  59 VOID DisplayIPPacket(
  60     PIP_PACKET IPPacket)
  61 {
  62 #if DBG
  63     UINT Length;
  64     PCHAR CharBuffer;
  65
  66     if ((DbgQueryDebugFilterState(DPFLTR_TCPIP_ID, DEBUG_PBUFFER | DPFLTR_MASK) != TRUE) ||
  67         (DbgQueryDebugFilterState(DPFLTR_TCPIP_ID, DEBUG_IP | DPFLTR_MASK) != TRUE)) {
  68         return;
  69     }
  70
  71     if (!IPPacket) {
  72         TI_DbgPrint(MIN_TRACE, ("Cannot display null packet.\n"));
  73         return;
  74     }
  75
  76     TI_DbgPrint(MIN_TRACE, ("IPPacket is at (0x%X).\n", IPPacket));
  77     TI_DbgPrint(MIN_TRACE, ("Header buffer is at (0x%X).\n", IPPacket->Header));
  78     TI_DbgPrint(MIN_TRACE, ("Header size is (%d).\n", IPPacket->HeaderSize));
  79     TI_DbgPrint(MIN_TRACE, ("TotalSize (%d).\n", IPPacket->TotalSize));
  80     TI_DbgPrint(MIN_TRACE, ("NdisPacket (0x%X).\n", IPPacket->NdisPacket));
  81
  82     CharBuffer = IPPacket->Header;
  83     Length = IPPacket->HeaderSize;
  84     DisplayIPHeader(CharBuffer, Length);
  85 #endif
  86 }
  87