reactos/apps/utils/net/tracert/tracert.c

   1 /*
   2  *  ReactOS Win32 Applications
   3  *  Copyright (C) 2005 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /*
  20  * COPYRIGHT:   See COPYING in the top level directory
  21  * PROJECT:     ReactOS traceroute utility
  22  * FILE:        apps/utils/net/tracert/tracert.c
  23  * PURPOSE:     trace a packets route through a network
  24  * PROGRAMMERS: Ged Murphy (gedmurphy@gmail.com)
  25  * REVISIONS:
  26  *   GM 03/05/05 Created
  27  *
  28  */
  29
  30
  31 #include <windows.h>
  32 #include <winsock2.h>
  33 #include <tchar.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <ws2tcpip.h>
  37 #include <string.h>
  38 #include <time.h>
  39 #include "tracert.h"
  40
  41 #define WIN32_LEAN_AND_MEAN
  42
  43 #ifdef DBG
  44 #undef DBG
  45 #endif
  46
  47 /*
  48  * globals
  49  */
  50 SOCKET icmpSock;                // socket descriptor
  51 SOCKADDR_IN source, dest;       // source and destination address info
  52 ECHO_REPLY_HEADER sendpacket;   // ICMP echo packet
  53 IPv4_HEADER recvpacket;         // return reveive packet
  54
  55 BOOL bUsePerformanceCounter;    // whether to use the high res performance counter
  56 LARGE_INTEGER TicksPerMs;       // number of millisecs in relation to proc freq
  57 LARGE_INTEGER TicksPerUs;       // number of microsecs in relation to proc freq
  58 LONGLONG lTimeStart;            // send packet, timer start
  59 LONGLONG lTimeEnd;              // receive packet, timer end
  60
  61 CHAR cHostname[256];            // target hostname
  62 CHAR cDestIP[18];               // target IP
  63
  64
  65 /*
  66  * command line options
  67  */
  68 BOOL bResolveAddresses = TRUE;  // -d  MS ping defaults to true.
  69 INT iMaxHops = 30;              // -h  Max number of hops before trace ends
  70 INT iHostList;                  // -j  @UNIMPLEMENTED@
  71 INT iTimeOut = 2000;            // -w  time before packet times out
  72
  73
  74
  75
  76 /*
  77  *
  78  * Parse command line parameters and set any options
  79  *
  80  */
  81 BOOL ParseCmdline(int argc, char* argv[])
  82 {
  83     int i;
  84
  85     if (argc < 2)
  86     {
  87        Usage();
  88        return FALSE;
  89     }
  90
  91     for (i = 1; i < argc; i++)
  92     {
  93         if (argv[i][0] == '-')
  94         {
  95             switch (argv[i][1])
  96             {
  97                case 'd': bResolveAddresses = FALSE;
  98                          break;
  99                case 'h': sscanf(argv[i+1], "%d", &iMaxHops);
 100                          break;
 101                case 'j': break; /* @unimplemented@ */
 102                case 'w': sscanf(argv[i+1], "%d", &iTimeOut);
 103                          break;
 104                default:
 105                   _tprintf(_T("%s is not a valid option.\n"), argv[i]);
 106                   Usage();
 107                   return FALSE;
 108             }
 109         }
 110         else
 111            /* copy target address */
 112            strncpy(cHostname, argv[i], 255);
 113     }
 114
 115     return TRUE;
 116 }
 117
 118
 119
 120 /*
 121  *
 122  * Driver function, controls the traceroute program
 123  *
 124  */
 125 INT Driver(VOID)
 126 {
 127
 128     INT iHopCount = 1;              // hop counter. default max is 30
 129     INT iSeqNum = 0;                // initialise packet sequence number
 130     INT iTTL = 1;                   // set initial packet TTL to 1
 131     BOOL bFoundTarget = FALSE;      // Have we reached our destination yet
 132     BOOL bAwaitPacket;              // indicates whether we have recieved a good packet
 133     INT iDecRes;                    // DecodeResponse return value
 134     INT iRecieveReturn;             // RecieveReturn return value
 135     INT iNameInfoRet;               // getnameinfo return value
 136     INT iPacketSize = PACKET_SIZE;  // packet size
 137     WORD wHeaderLen;                // header length
 138     PECHO_REPLY_HEADER icmphdr;
 139
 140
 141     //temps for getting host name
 142     CHAR cHost[256];
 143     CHAR cServ[256];
 144     CHAR *ip;
 145
 146     /* setup winsock */
 147     WSADATA wsaData;
 148
 149     /* check for winsock 2 */
 150     if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
 151     {
 152 #ifdef DBG
 153         _tprintf(_T("WSAStartup failed.\n"));
 154 #endif /* DBG */
 155         exit(1);
 156     }
 157
 158     /* establish what timing method we can use */
 159     SetupTimingMethod();
 160
 161     /* setup target info */
 162     ResolveHostname();
 163
 164     /* print standard tracing info to screen */
 165     _tprintf(_T("\nTracing route to %s [%s]\n"), cHostname, cDestIP);
 166     _tprintf(_T("over a maximum of %d hop"), iMaxHops);
 167     iMaxHops > 1 ? _tprintf(_T("s:\n\n")) : _tprintf(_T(":\n\n"));
 168
 169     /* run until we hit either max hops, or we recieve 3 echo replys */
 170     while ((iHopCount <= iMaxHops) && (bFoundTarget != TRUE))
 171     {
 172         INT i;
 173
 174         _tprintf(_T("%3d   "), iHopCount);
 175         /* run 3 pings for each hop */
 176         for (i=0; i<3; i++)
 177         {
 178             if (Setup(iTTL) != TRUE)
 179             {
 180 #ifdef DBG
 181                 _tprintf(_T("error in Setup()\n"));
 182 #endif /* DBG */
 183                 WSACleanup();
 184                 exit(1);
 185             }
 186             PreparePacket(iPacketSize, iSeqNum);
 187             if (SendPacket(iPacketSize) != SOCKET_ERROR)
 188             {
 189                 /* loop until we get a good packet */
 190                 bAwaitPacket = TRUE;
 191                 while (bAwaitPacket)
 192                 {
 193                     /* Receive replies until we either get a successful
 194                      * read, or a fatal error occurs. */
 195                     if ((iRecieveReturn = ReceivePacket(iPacketSize)) < 0)
 196                     {
 197                         /* check the sequence number in the packet
 198                          * if it's bad, complain and wait for another packet
 199                          * , otherwise break */
 200                         wHeaderLen = recvpacket.h_len * 4;
 201                         icmphdr = (ECHO_REPLY_HEADER *)((char*)&recvpacket + wHeaderLen);
 202                         if (icmphdr->icmpheader.seq != iSeqNum)
 203                         {
 204                             _tprintf(_T("bad sequence number!\n"));
 205                             continue;
 206                         }
 207                         else
 208                             break;
 209                     }
 210
 211                     /* if RecievePacket timed out we don't bother decoding */
 212                     if (iRecieveReturn != 1)
 213                     {
 214                         iDecRes = DecodeResponse(iPacketSize, iSeqNum);
 215
 216                         switch (iDecRes)
 217                         {
 218                            case 0 : bAwaitPacket = FALSE;  /* time exceeded */
 219                                     break;
 220                            case 1 : bAwaitPacket = FALSE;  /* echo reply */
 221                                     break;
 222                            case 2 : bAwaitPacket = FALSE;  /* destination unreachable */
 223                                     break;
 224 #ifdef DBG
 225                            case -1 :
 226                                      _tprintf(_T("recieved foreign packet\n"));
 227                                      break;
 228                            case -2 :
 229                                      _tprintf(_T("error in DecodeResponse\n"));
 230                                      break;
 231                            case -3 :
 232                                      _tprintf(_T("unknown ICMP packet\n"));
 233                                      break;
 234 #endif /* DBG */
 235                            default : break;
 236                         }
 237                     }
 238                     else
 239                         /* packet timed out. Don't wait for it again */
 240                         bAwaitPacket = FALSE;
 241                 }
 242             }
 243
 244             iSeqNum++;
 245             _tprintf(_T("   "));
 246         }
 247
 248         if(bResolveAddresses)
 249         {
 250            /* gethostbyaddr() and getnameinfo() are
 251             * unimplemented in ROS at present.
 252             * Alex has advised he will be implementing getnameinfo.
 253             * I've used that for the time being for testing in Windows*/
 254
 255               //ip = inet_addr(inet_ntoa(source.sin_addr));
 256               //host = gethostbyaddr((char *)&ip, 4, 0);
 257
 258               ip = inet_ntoa(source.sin_addr);
 259
 260               iNameInfoRet = getnameinfo((SOCKADDR *)&source,
 261                                  sizeof(SOCKADDR),
 262                                  cHost,
 263                                  256,
 264                                  cServ,
 265                                  256,
 266                                  NI_NUMERICSERV);
 267               if (iNameInfoRet == 0)
 268               {
 269                  /* if IP address resolved to a hostname,
 270                    * print the IP address after it */
 271                   if (lstrcmpA(cHost, ip) != 0)
 272                       _tprintf(_T("%s [%s]"), cHost, ip);
 273                   else
 274                       _tprintf(_T("%s"), cHost);
 275               }
 276               else
 277               {
 278                   _tprintf(_T("error: %d"), WSAGetLastError());
 279 #ifdef DBG
 280                   _tprintf(_T(" getnameinfo failed: %d"), iNameInfoRet);
 281 #endif /* DBG */
 282               }
 283
 284         }
 285         else
 286            _tprintf(_T("%s"), inet_ntoa(source.sin_addr));
 287
 288         _tprintf(_T("\n"));
 289
 290         /* check if we've arrived at the target */
 291         if (strcmp(cDestIP, inet_ntoa(source.sin_addr)) == 0)
 292             bFoundTarget = TRUE;
 293         else
 294         {
 295             iTTL++;
 296             iHopCount++;
 297             Sleep(500);
 298         }
 299     }
 300     _tprintf(_T("\nTrace complete.\n"));
 301     WSACleanup();
 302
 303     return 0;
 304 }
 305
 306
 307 /*
 308  * Establish if performance counters are available and
 309  * set up timing figures in relation to processor frequency.
 310  * If performance counters are not available, we'll be using
 311  * gettickcount, so set the figures to 1
 312  *
 313  */
 314 VOID SetupTimingMethod(VOID)
 315 {
 316     LARGE_INTEGER PerformanceCounterFrequency;
 317
 318     /* check if performance counters are available */
 319     bUsePerformanceCounter = QueryPerformanceFrequency(&PerformanceCounterFrequency);
 320     if (bUsePerformanceCounter)
 321     {
 322         /* restrict execution to first processor on SMP systems */
 323         if (SetThreadAffinityMask(GetCurrentThread(), 1) == 0)
 324             bUsePerformanceCounter = FALSE;
 325
 326         TicksPerMs.QuadPart  = PerformanceCounterFrequency.QuadPart / 1000;
 327         TicksPerUs.QuadPart  = PerformanceCounterFrequency.QuadPart / 1000000;
 328     }
 329
 330     if (!bUsePerformanceCounter)
 331     {
 332         TicksPerMs.QuadPart = 1;
 333         TicksPerUs.QuadPart = 1;
 334     }
 335 }
 336
 337
 338 /*
 339  *
 340  * Check for a hostname or dotted deciamal for our target.
 341  * If we have a hostname, resolve to an IP and store it, else
 342  * just store the target IP address. Also set up other key
 343  * SOCKADDR_IN members needed for the connection.
 344  *
 345  */
 346 VOID ResolveHostname(VOID)
 347 {
 348     HOSTENT *hp;
 349     ULONG addr;
 350
 351     memset(&dest, 0, sizeof(dest));
 352
 353     addr = inet_addr(cHostname);
 354     /* if address is not a dotted decimal */
 355     if (addr == INADDR_NONE)
 356     {
 357        hp = gethostbyname(cHostname);
 358        if (hp != 0)
 359        {
 360           memcpy(&dest.sin_addr, hp->h_addr, hp->h_length);
 361           //dest.sin_addr = *((struct in_addr *)hp->h_addr);
 362           dest.sin_family = hp->h_addrtype;
 363        }
 364        else
 365        {
 366           _tprintf(_T("Unable to resolve target system name %s.\n"), cHostname);
 367           WSACleanup();
 368           exit(1);
 369        }
 370     }
 371     else
 372     {
 373         dest.sin_addr.s_addr = addr;
 374         dest.sin_family = AF_INET;
 375     }
 376     /* copy destination IP address into a string */
 377     strcpy(cDestIP, inet_ntoa(dest.sin_addr));
 378 }
 379
 380
 381
 382 /*
 383  *
 384  * Create our socket which will be used for sending and recieving,
 385  * Socket Type is raw, Protocol is ICMP. Also set the TTL value which will be
 386  * set in the outgoing IP packet.
 387  *
 388  */
 389 INT Setup(INT iTTL)
 390 {
 391     INT iSockRet;
 392
 393     /* create raw socket */
 394     icmpSock = WSASocket(AF_INET, SOCK_RAW, IPPROTO_ICMP, 0, 0, 0);
 395     if (icmpSock == INVALID_SOCKET)
 396     {
 397        _tprintf(_T("Could not create socket : %d.\n"), WSAGetLastError());
 398        if (WSAGetLastError() == WSAEACCES)
 399        {
 400             _tprintf(_T("\n\nYou must be an administrator to run this program!\n\n"));
 401             WSACleanup();
 402             exit(1);
 403        }
 404        return FALSE;
 405     }
 406
 407     /* setup for TTL */
 408     iSockRet = setsockopt(icmpSock, IPPROTO_IP, IP_TTL, (const char *)&iTTL, sizeof(iTTL));
 409     if (iSockRet == SOCKET_ERROR)
 410     {
 411        _tprintf(_T("TTL setsockopt failed : %d. \n"), WSAGetLastError());
 412        return FALSE;
 413     }
 414
 415     return TRUE;
 416 }
 417
 418
 419
 420 /*
 421  * Prepare the ICMP echo request packet for sending.
 422  * Calculate the packet checksum
 423  *
 424  */
 425 VOID PreparePacket(INT iPacketSize, INT iSeqNum)
 426 {
 427     /* assemble ICMP echo request packet */
 428     sendpacket.icmpheader.type      = ECHO_REQUEST;
 429     sendpacket.icmpheader.code      = 0;
 430     sendpacket.icmpheader.checksum  = 0;
 431     sendpacket.icmpheader.id        = (USHORT)GetCurrentProcessId();
 432     sendpacket.icmpheader.seq       = iSeqNum;
 433
 434     /* calculate checksum of packet */
 435     sendpacket.icmpheader.checksum  = CheckSum((PUSHORT)&sendpacket, sizeof(ICMP_HEADER) + iPacketSize);
 436 }
 437
 438
 439
 440 /*
 441  *
 442  * Get the system time and send the ICMP packet to the destination
 443  * address.
 444  *
 445  */
 446 INT SendPacket(INT datasize)
 447 {
 448     INT iSockRet;
 449     INT iPacketSize;
 450
 451     iPacketSize = sizeof(ECHO_REPLY_HEADER) + datasize;
 452
 453 #ifdef DBG
 454     _tprintf(_T("\nsending packet of %d bytes\n"), iPacketSize);
 455 #endif /* DBG */
 456
 457     /* get time packet was sent */
 458     lTimeStart = GetTime();
 459
 460     iSockRet = sendto(icmpSock,              //socket
 461                       (char *)&sendpacket,   //buffer
 462                       iPacketSize,           //size of buffer
 463                       0,                     //flags
 464                       (SOCKADDR *)&dest,     //destination
 465                       sizeof(dest));         //address length
 466
 467     if (iSockRet == SOCKET_ERROR)
 468     {
 469         if (WSAGetLastError() == WSAEACCES)
 470         {
 471             _tprintf(_T("\n\nYou must be an administrator to run this program!\n\n"));
 472             exit(1);
 473             WSACleanup();
 474         }
 475         else
 476         {
 477 #ifdef DBG
 478             _tprintf(_T("sendto failed %d\n"), WSAGetLastError());
 479 #endif /* DBG */
 480             return FALSE;
 481         }
 482     }
 483 #ifdef DBG
 484     _tprintf(_T("sent %d bytes\n"), iSockRet);
 485 #endif /* DBG */
 486
 487     /* return number of bytes sent */
 488     return iSockRet;
 489 }
 490
 491
 492
 493 /*
 494  *
 495  * Set up a timeout value and put the socket in a select poll.
 496  * Wait until we recieve an IPv4 reply packet in reply to the ICMP
 497  * echo request packet and get the time the packet was recieved.
 498  * If we don't recieve a packet, do some checking to establish why.
 499  *
 500  */
 501 INT ReceivePacket(INT datasize)
 502 {
 503     TIMEVAL timeVal;
 504     FD_SET readFDS;
 505     int iSockRet = 0, iSelRet;
 506     int iFromLen;
 507     int iPacketSize;
 508
 509     /* allow for a larger recv buffer to store ICMP TTL
 510      * exceed, IP header and orginal ICMP request */
 511     iPacketSize = MAX_REC_SIZE + datasize;
 512
 513     iFromLen = sizeof(source);
 514
 515 #ifdef DBG
 516     _tprintf(_T("receiving packet. Available buffer, %d bytes\n"), iPacketSize);
 517 #endif /* DBG */
 518
 519     /* monitor icmpSock for incomming connections */
 520     FD_ZERO(&readFDS);
 521     FD_SET(icmpSock, &readFDS);
 522
 523     /* set timeout values */
 524     timeVal.tv_sec  = iTimeOut / 1000;
 525     timeVal.tv_usec = iTimeOut % 1000;
 526
 527     iSelRet = select(0, &readFDS, NULL, NULL, &timeVal);
 528
 529     if ((iSelRet != SOCKET_ERROR) && (iSelRet != 0))
 530     {
 531         iSockRet = recvfrom(icmpSock,              //socket
 532                            (char *)&recvpacket,    //buffer
 533                            iPacketSize,            //size of buffer
 534                            0,                      //flags
 535                            (SOCKADDR *)&source,    //source address
 536                            &iFromLen);             //pointer to address length
 537         /* get time packet was recieved */
 538         lTimeEnd = GetTime();
 539     /* if socket timed out */
 540     }
 541     else if (iSelRet == 0)
 542     {
 543         _tprintf(_T("   *  "));
 544         return 1;
 545     }
 546     else if (iSelRet == SOCKET_ERROR)
 547     {
 548         _tprintf(_T("select() failed in sendPacket() %d\n"), WSAGetLastError());
 549         return -1;
 550     }
 551
 552
 553     if (iSockRet == SOCKET_ERROR)
 554     {
 555         _tprintf(_T("recvfrom failed: %d\n"), WSAGetLastError());
 556         return -2;
 557     }
 558 #ifdef DBG
 559     else
 560     _tprintf(_T("reveived %d bytes\n"), iSockRet);
 561 #endif /* DBG */
 562
 563     return 0;
 564 }
 565
 566
 567
 568 /*
 569  *
 570  * Cast the IPv4 packet to an echo reply and to a TTL exceed.
 571  * Check the 'type' field to establish what was recieved, and
 572  * ensure the packet is related to the originating process.
 573  * It all is well, print the time taken for the round trip.
 574  *
 575  */
 576 INT DecodeResponse(INT iPacketSize, INT iSeqNum)
 577 {
 578     unsigned short header_len = recvpacket.h_len * 4;
 579     /* cast the recieved packet into an ECHO reply and a TTL Exceed so we can check the ID*/
 580     ECHO_REPLY_HEADER *IcmpHdr = (ECHO_REPLY_HEADER *)((char*)&recvpacket + header_len);
 581     TTL_EXCEED_HEADER *TTLExceedHdr = (TTL_EXCEED_HEADER *)((char *)&recvpacket + header_len);
 582
 583     /* Make sure the reply is ok */
 584     if (iPacketSize < header_len + ICMP_MIN_SIZE)
 585     {
 586         _tprintf(_T("too few bytes from %s\n"), inet_ntoa(dest.sin_addr));
 587         return -2;
 588     }
 589
 590     switch (IcmpHdr->icmpheader.type)
 591     {
 592            case TTL_EXCEEDED :
 593                 if (TTLExceedHdr->OrigIcmpHeader.id != (USHORT)GetCurrentProcessId())
 594                 {
 595                 /* FIXME */
 596                 /* we've picked up a packet not related to this process
 597                  * probably from another local program. We ignore it */
 598 #ifdef DGB
 599                     _tprintf(_T("header id,  process id  %d"), TTLExceedHdr->OrigIcmpHeader.id, GetCurrentProcessId());
 600 #endif /* DBG */
 601                     //_tprintf(_T("oops ");
 602                     return -1;
 603                 }
 604                 _tprintf(_T("%3Ld ms"), (lTimeEnd - lTimeStart) / TicksPerMs.QuadPart);
 605                 return 0;
 606            case ECHO_REPLY :
 607                 if (IcmpHdr->icmpheader.id != (USHORT)GetCurrentProcessId())
 608                 {
 609                 /* FIXME */
 610                 /* we've picked up a packet not related to this process
 611                  * probably from another local program. We ignore it */
 612 #ifdef DGB
 613                     _tprintf(_T("\nPicked up wrong packet. icmpheader.id = %d and process id = %d"), IcmpHdr->icmpheader.id, GetCurrentProcessId());
 614 #endif /* DBG */
 615                     //_tprintf(_T("oops ");
 616                     return -1;
 617                 }
 618                 _tprintf(_T("%3Ld ms"), (lTimeEnd - lTimeStart) / TicksPerMs.QuadPart);
 619                 return 1;
 620            case DEST_UNREACHABLE :
 621                 _tprintf(_T("  *  "));
 622                 return 2;
 623            default :
 624                 /* unknown ICMP packet */
 625                 return -3;
 626     }
 627 }
 628
 629
 630 /*
 631  *
 632  * Get the system time using preformance counters if available,
 633  * otherwise fall back to GetTickCount()
 634  *
 635  */
 636
 637 LONG GetTime(VOID)
 638 {
 639     LARGE_INTEGER Time;
 640
 641     if (bUsePerformanceCounter)
 642     {
 643         if (QueryPerformanceCounter(&Time) == 0)
 644         {
 645             Time.u.LowPart = (DWORD)GetTickCount();
 646             Time.u.HighPart = 0;
 647             return (LONGLONG)Time.u.LowPart;
 648         }
 649     }
 650     else
 651     {
 652             Time.u.LowPart = (DWORD)GetTickCount();
 653             Time.u.HighPart = 0;
 654             return (LONGLONG)Time.u.LowPart;
 655     }
 656     return Time.QuadPart;
 657 }
 658
 659
 660 /*
 661  *
 662  * Calculate packet checksum.
 663  *
 664  */
 665 WORD CheckSum(PUSHORT data, UINT size)
 666 {
 667     DWORD dwSum = 0;
 668
 669     while (size > 1)
 670     {
 671         dwSum += *data++;
 672         size -= sizeof(USHORT);
 673     }
 674
 675     if (size)
 676         dwSum += *(UCHAR*)data;
 677
 678     dwSum = (dwSum >> 16) + (dwSum & 0xFFFF);
 679     dwSum += (dwSum >> 16);
 680
 681     return (USHORT)(~dwSum);
 682 }
 683
 684
 685 /*
 686  *
 687  * print program usage to screen
 688  *
 689  */
 690 VOID Usage(VOID)
 691 {
 692     _tprintf(_T("\nUsage: tracert [-d] [-h maximum_hops] [-j host-list] [-w timeout] target_name\n\n"
 693                 "Options:\n"
 694                 "    -d                 Do not resolve addresses to hostnames.\n"
 695                 "    -h maximum_hops    Maximum number of hops to search for target.\n"
 696                 "    -j host-list       Loose source route along host-list.\n"
 697                 "    -w timeout         Wait timeout milliseconds for each reply.\n\n"));
 698
 699     /* temp notes to stop user questions until getnameinfo/gethostbyaddr and getsockopt are implemented */
 700     _tprintf(_T("NOTES\n-----\n"
 701            "- Setting TTL values is not currently supported in ReactOS, so the trace will\n"
 702            "  jump straight to the destination. This feature will be implemented soon.\n"
 703            "- Host info is not currently available in ReactOS and will fail with strange\n"
 704            "  results. Use -d to force it not to resolve IP's.\n"
 705            "- For testing purposes, all should work as normal in a Windows environment\n\n"));
 706 }
 707
 708
 709
 710 /*
 711  *
 712  * Program entry point
 713  *
 714  */
 715 int main(int argc, char* argv[])
 716 {
 717     if (!ParseCmdline(argc, _argv)) return -1;
 718
 719     Driver();
 720
 721     return 0;
 722 }