reactos/apps/utils/net/tracert/tracert.h

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS traceroute utility
   4  * FILE:        apps/utils/net/tracert/tracert.h
   5  * PURPOSE:     trace a packets route through a network
   6  * PROGRAMMERS: Ged Murphy (gedmurphy@gmail.com)
   7  * REVISIONS:
   8  *   GM 03/05/05 Created
   9  */
  10
  11 #define ECHO_REPLY 0
  12 #define DEST_UNREACHABLE 3
  13 #define ECHO_REQUEST 8
  14 #define TTL_EXCEEDED 11
  15
  16 #define ICMP_MIN_SIZE 8
  17 #define ICMP_MAX_SIZE 65535
  18 #define PACKET_SIZE 32
  19 /* we need this for packets which have the 'dont fragment'
  20  * bit set, as they can get quite large otherwise
  21  * (I've seen some reach 182 bytes */
  22 #define MAX_REC_SIZE 200
  23
  24 /* pack the structures */
  25 #pragma pack(1)
  26
  27 /* IPv4 Header, 20 bytes */
  28 typedef struct IPv4Header {
  29     BYTE h_len:4;
  30     BYTE version:4;
  31     BYTE tos;
  32     USHORT length;
  33     USHORT id;
  34     USHORT flag_frag;
  35     BYTE ttl;
  36     BYTE proto;
  37     USHORT checksum;
  38     ULONG source;
  39     ULONG dest;
  40 } IPv4_HEADER, *PIPv4_HEADER;
  41
  42 /* ICMP Header, 8 bytes */
  43 typedef struct ICMPHeader {
  44     BYTE type;
  45     BYTE code;
  46     USHORT checksum;
  47     USHORT id; // not used in time exceeded
  48     USHORT seq; // not used in time exceeded
  49 } ICMP_HEADER, *PICMP_HEADER;
  50
  51 /* ICMP Echo Reply Header, 12 bytes */
  52 typedef struct EchoReplyHeader {
  53     struct ICMPHeader icmpheader;
  54     struct timeval timestamp;
  55 } ECHO_REPLY_HEADER, *PECHO_REPLY_HEADER;
  56
  57 /* ICMP Echo Reply Header, 12 bytes */
  58 typedef struct TTLExceedHeader {
  59     struct ICMPHeader icmpheader;
  60     struct IPv4Header ipheader;
  61     struct ICMPHeader OrigIcmpHeader;
  62 } TTL_EXCEED_HEADER, *PTTL_EXCEED_HEADER;
  63
  64 /* return to normal */
  65 #pragma pack()
  66
  67
  68 /* function definitions */
  69 //BOOL ParseCmdline(int argc, char* argv[]);
  70 INT Driver(void);
  71 INT Setup(INT ttl);
  72 VOID SetupTimingMethod(void);
  73 VOID ResolveHostname(void);
  74 VOID PreparePacket(INT packetSize, INT seqNum);
  75 INT SendPacket(INT datasize);
  76 INT ReceivePacket(INT datasize);
  77 INT DecodeResponse(INT packetSize, INT seqNum);
  78 LONG GetTime(void);
  79 WORD CheckSum(PUSHORT data, UINT size);
  80 VOID Usage(void);