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| //------------------------------------------------------------------------------
(* SoLuTions is an Versatile Library for Delphi -
* -
* Version alternative publiée sur "www.developpez.net" -
* Post : "Comment connaître le type d'un élément dans un réseau IP ? " -
* Post Number : 2357046 -
* Post URL = "http://www.developpez.net/forums/d387409/environnements-developpement/delphi/web-reseau/connaitre-type-d-element-reseau-ip/#post2357046"
* -
* Version alternative publiée sur "www.developpez.net" -
* Post : "Utilisation d'un ping sous Delphi XE6" -
* Post Number : 8397605 -
* Post URL = "http://www.developpez.net/forums/d1545448/environnements-developpement/delphi/web-reseau/utilisation-d-ping-sous-delphi-xe6/#post8397605"
* -
* Version alternative publiée sur "www.developpez.net" -
* Post : "Client Socket avec domaine DNS Dynamique " -
* Post Number : 7469064 -
* Post URL = "http://www.developpez.net/forums/d1376072/c-cpp/outils-c-cpp/cppbuilder/client-socket-domaine-dns-dynamique/#post7469064"
* -
* Copyright ou © ou Copr. "SLT Solutions", (2006) -
* contributeur : ShaiLeTroll (2015) - Reprise du Ping de la SLT<2006> sous Delphi 7 avec fusion du QueryDNS de la SLT<2012> sous C++Builder XE2/XE3 vers la SLT<2013> sous Delphi XE2
* -
* ShaiLeTroll -
* -
* Ce logiciel est un programme informatique servant à aider les développeurs -
* Delphi avec une bibliothèque polyvalente, adaptable et fragmentable. -
* -
* Ce logiciel est régi par la licence CeCILL-C soumise au droit français et -
* respectant les principes de diffusion des logiciels libres. Vous pouvez -
* utiliser, modifier et/ou redistribuer ce programme sous les conditions -
* de la licence CeCILL-C telle que diffusée par le CEA, le CNRS et l'INRIA -
* sur le site "http://www.cecill.info". -
* -
* En contrepartie de l'accessibilité au code source et des droits de copie, -
* de modification et de redistribution accordés par cette licence, il n'est -
* offert aux utilisateurs qu'une garantie limitée. Pour les mêmes raisons, -
* seule une responsabilité restreinte pèse sur l'auteur du programme, le -
* titulaire des droits patrimoniaux et les concédants successifs. -
* -
* A cet égard l'attention de l'utilisateur est attirée sur les risques -
* associés au chargement, à l'utilisation, à la modification et/ou au -
* développement et à la reproduction du logiciel par l'utilisateur étant -
* donné sa spécificité de logiciel libre, qui peut le rendre complexe à -
* manipuler et qui le réserve donc à des développeurs et des professionnels -
* avertis possédant des connaissances informatiques approfondies. Les -
* utilisateurs sont donc invités à charger et tester l'adéquation du -
* logiciel à leurs besoins dans des conditions permettant d'assurer la -
* sécurité de leurs systèmes et ou de leurs données et, plus généralement, -
* à l'utiliser et l'exploiter dans les mêmes conditions de sécurité. -
* -
* Le fait que vous puissiez accéder à cet en-tête signifie que vous avez -
* pris connaissance de la licence CeCILL-C, et que vous en avez accepté les -
* termes. -
* -
*----------------------------------------------------------------------------*)
unit SLT.Common.ICMP;
{$ALIGN ON}
{$MINENUMSIZE 4}
interface
uses System.Classes, System.SysUtils,
Winapi.Windows, Winapi.WinSock;
type
{ Forward class declarations }
TSLTICMPRequest = class;
/// <summary>TSLTICMPRequest encapsule une requete Ping via ICMP</summary>
TSLTICMPRequest = class(TObject)
private
FTextResult: TStrings;
function GetTextResult(AAllowMultiLines: Boolean): string;
procedure AddResult(const AText: string);
function QueryDNS(const HostName: string; out IP: TInAddr): Boolean;
public
destructor Destroy(); override;
function Ping(const IP: string): Boolean;
property TextResult[AAllowMultiLines: Boolean]: string read GetTextResult;
end;
implementation
// -----------------------------------------------------------------------------
procedure TSLTICMPRequest.AddResult(const AText: string);
begin
if not Assigned(FTextResult) then
FTextResult := TStringList.Create();
FTextResult.Add(AText);
end;
// -----------------------------------------------------------------------------
destructor TSLTICMPRequest.Destroy();
begin
FreeAndNil(FTextResult);
inherited Destroy();
end;
// -----------------------------------------------------------------------------
function TSLTICMPRequest.GetTextResult(AAllowMultiLines: Boolean): string;
begin
if Assigned(FTextResult) then
begin
if not AAllowMultiLines then
begin
FTextResult.Delimiter := ';';
FTextResult.QuoteChar := '!';
FTextResult.StrictDelimiter := True;
Result := FTextResult.DelimitedText;
end
else
Result := FTextResult.Text;
end
else
Result := '';
end;
// -----------------------------------------------------------------------------
function TSLTICMPRequest.Ping(const IP: string): Boolean;
type
TECHO_REPLY_MSG = record
Status: ULONG;
Message: string;
end;
const
MSG: array[1..27] of TECHO_REPLY_MSG = (
(Status: 0; Message: 'The status was success.'),
(Status: 1; Message: 'The reply buffer was too small.'),
(Status: 2; Message: 'The destination network was unreachable. In IPv6 terminology, this status value is also defined as IP_DEST_NO_ROUTE.'),
(Status: 3; Message: 'The destination host was unreachable. In IPv6 terminology, this status value is also defined as IP_DEST_ADDR_UNREACHABLE.'),
(Status: 4; Message: 'The destination protocol was unreachable. In IPv6 terminology, this status value is also defined as IP_DEST_PROHIBITED.'),
(Status: 5; Message: 'The destination port was unreachable.'),
(Status: 6; Message: 'No IP resources were available.'),
(Status: 7; Message: 'A bad IP option was specified.'),
(Status: 8; Message: 'A hardware error occurred.'),
(Status: 9; Message: 'The packet was too big.'),
(Status: 10; Message: 'The request timed out.'),
(Status: 11; Message: 'A bad request.'),
(Status: 12; Message: 'A bad route.'),
(Status: 13; Message: 'The Time to Live (IPv4) or Hop Limit (IPv6) expired in transit. In IPv6 terminology, this status value is also defined as IP_HOP_LIMIT_EXCEEDED.'),
(Status: 14; Message: 'The Time to Live (IPv4) or Hop Limit (IPv6) expired during fragment reassembly. In IPv6 terminology, this status value is also defined as IP_REASSEMBLY_TIME_EXCEEDED.'),
(Status: 15; Message: 'A parameter problem. In IPv6 terminology, this status value is also defined as IP_PARAMETER_PROBLEM.'),
(Status: 16; Message: ' Message: ''Datagrams are arriving too fast to be processed and datagrams may have been discarded.'),
(Status: 17; Message: 'An IP option was too big.'),
(Status: 18; Message: 'A bad destination.'),
(Status: 40; Message: 'The destination was unreachable. The value is only applicable to IPv6.'),
(Status: 41; Message: 'The time was exceeded. The value is only applicable to IPv6.'),
(Status: 42; Message: 'A bad IP header was encountered. The value is only applicable to IPv6.'),
(Status: 43; Message: 'An unrecognized next header was encountered. The value is only applicable to IPv6.'),
(Status: 44; Message: 'An ICMP error occurred. The value is only applicable to IPv6.'),
(Status: 45; Message: 'A destination scope ID mismatch occurred. The value is only applicable to IPv6.'),
(Status: 50; Message: 'General Failure.'),
(Status: 255; Message: 'IP Pending.')
);
function GetStatus(Status: ULONG): string;
var
iMsg: Integer;
begin
Result := SysErrorMessage(Status);
if Status >= 11000 then
Status := Status - 11000;
for iMsg := Low(MSG) to High(MSG) do
begin
if MSG[iMsg].Status = Status then
begin
Result := MSG[iMsg].Message;
Exit;
end;
end;
end;
type
PIP_OPTION_INFORMATION = ^TIP_OPTION_INFORMATION;
TIP_OPTION_INFORMATION = record
Ttl: UCHAR;
Tos: UCHAR;
Flags: UCHAR;
OptionsSize: UCHAR;
OptionsData: PUCHAR;
end;
PICMP_ECHO_REPLY = ^TICMP_ECHO_REPLY;
TICMP_ECHO_REPLY = record
Address: TInAddr;
Status: ULONG;
RoundTripTime: ULONG;
DataSize: Word;
Reserved: Word;
Data: Pointer;
Options: TIP_OPTION_INFORMATION;
end;
var
IphlpapiHandle: THandle;
_IcmpCreateFile: function(): THandle; stdcall;
_IcmpCloseHandle: function(IcmpHandle: THandle): BOOL; stdcall;
_IcmpSendEcho: function(IcmpHandle: THandle; DestinationAddress: TInAddr; RequestData: Pointer; RequestSize: WORD; RequestOptions: PIP_OPTION_INFORMATION; ReplyBuffer: Pointer; ReplySize: DWORD; Timeout: DWORD): DWORD; stdcall;
var
InAddr: TInAddr;
IcmpHandle: THandle;
SendText: string;
SendData: PChar;
SendLen, ReplyLen: Integer;
dwRetVal: DWORD;
Reply: PICMP_ECHO_REPLY; // si compilé en 64 bits, faut changer en ICMP_ECHO_REPLY32
TimeStr: string;
begin
try
IphlpapiHandle := LoadLibrary('Iphlpapi');
Result := IphlpapiHandle > 0;
if Result then
begin
try
@_IcmpCreateFile := GetProcAddress(IphlpapiHandle, 'IcmpCreateFile');
@_IcmpCloseHandle := GetProcAddress(IphlpapiHandle, 'IcmpCloseHandle');
@_IcmpSendEcho := GetProcAddress(IphlpapiHandle, 'IcmpSendEcho');
Result := Assigned(@_IcmpCreateFile) and Assigned(@_IcmpCloseHandle) and Assigned(@_IcmpSendEcho);
if Result then
begin
SendText := 'SLT - Test de la Connexion (Ping) par un Send Echo (ICMP) !';
InAddr.S_addr := inet_addr(PAnsiChar(AnsiString(IP)));
if DWORD(InAddr.S_addr) = INADDR_NONE then
begin
AddResult(Format('Ping sur %s, Conversion Nom d''Hôte en IP', [IP]));
if not QueryDNS(IP, InAddr) then
Exit(False);
end;
IcmpHandle := _IcmpCreateFile();
try
SendLen := Length(SendText) * SizeOf(Char);
// The buffer should be large enough to hold at least one ICMP_ECHO_REPLY structure plus RequestSize bytes of data
ReplyLen := SendLen + SizeOf(TICMP_ECHO_REPLY);
GetMem(Reply, ReplyLen);
try
SendData := PChar(SendText);
dwRetVal := _IcmpSendEcho(IcmpHandle, InAddr, SendData, StrLen(SendData), nil, Reply, ReplyLen, 1000);
Result := dwRetVal <> 0;
if Result then
begin
if Reply^.RoundTripTime <= 0 then
TimeStr := ' < 1ms'
else
TimeStr := Format(' = %dms', [Reply^.RoundTripTime]);
AddResult(Format('Ping sur %s, Status : "%s", Temps%s, Message Reçu %d/1, TTL = %d', [IP, GetStatus(Reply^.Status), TimeStr, dwRetVal, Reply^.Options.Ttl]));
end
else
begin
AddResult(Format('Echec du Ping sur %s, Erreur %d : %s', [IP, Winapi.Windows.GetLastError(), GetStatus(Winapi.Windows.GetLastError())]));
end;
finally
FreeMem(Reply);
end;
finally
_IcmpCloseHandle(IcmpHandle);
end;
end
else
AddResult('Impossible d''Obtenir les Procédures "IcmpCreateFile", "IcmpCloseHandle" et "IcmpSendEcho"');
finally
FreeLibrary(IphlpapiHandle);
end;
end
else
AddResult('Impossible de Charger "Iphlpapi.dll"');
except
on E: Exception do
begin
AddResult(E.Message);
Result := False;
end;
end;
end;
// -----------------------------------------------------------------------------
function TSLTICMPRequest.QueryDNS(const HostName: string; out IP: TInAddr): Boolean;
type
PIP4_ADDRESS = ^IP4_ADDRESS;
IP4_ADDRESS = DWORD;
IP4_ARRAY = record
AddrCount: DWORD;
AddrArray: PIP4_ADDRESS;
end;
DNS_A_DATA = record
IpAddress: IP4_ADDRESS;
end;
PDNS_RECORD = ^DNS_RECORD;
DNS_RECORD = record
pNext: PDNS_RECORD;
pName: PChar;
wType: WORD;
wDataLength: WORD;
Flags: record
DNS_RECORD_FLAGS: DWORD; // champs de bits
end;
dwTtl: DWORD;
dwReserved: DWORD;
Data: record
A: DNS_A_DATA;
end;
end;
DNS_STATUS = LONG;
DNS_FREE_TYPE = (DnsFreeFlat, DnsFreeRecordList);
const
DNS_TYPE_A = $0001;
DNS_QUERY_STANDARD = $00000000;
var
pDnsRecord: PDNS_RECORD;
DnsapiHandle: THandle;
_DnsQuery: function(lpstrName: PChar; wType: WORD; Options: DWORD; pExtra: Pointer; var ppQueryResultsSet: PDNS_RECORD; pReserved: Pointer): DNS_STATUS; stdcall;
_DnsRecordListFree: procedure(pRecordList: PDNS_RECORD; FreeType: DNS_FREE_TYPE); stdcall;
IPV4Value: IP4_ADDRESS;
begin
try
DnsapiHandle := LoadLibrary('Dnsapi');
Result := DnsapiHandle > 0;
if Result then
begin
try
@_DnsQuery := GetProcAddress(DnsapiHandle, 'DnsQuery_W');
@_DnsRecordListFree := GetProcAddress(DnsapiHandle, 'DnsRecordListFree');
Result := Assigned(_DnsQuery) and Assigned(_DnsRecordListFree);
if Result then
begin
Result := _DnsQuery(PChar(HostName), DNS_TYPE_A, DNS_QUERY_STANDARD, nil, pDnsRecord, nil) = ERROR_SUCCESS;
if Result then
begin
IPV4Value := pDnsRecord.Data.A.IpAddress;
_DnsRecordListFree(pDnsRecord, DnsFreeRecordList);
IP.S_addr := IPV4Value;
AddResult(Format('Résolution de %s en %s', [HostName, inet_ntoa(IP)]));
end
else
AddResult(Format('Echec de résolution de %s', [HostName]));
end
else
AddResult('Impossible d''Obtenir la procédure "DnsQuery" ou "DnsRecordListFree"');
finally
FreeLibrary(DnsapiHandle);
end;
end
else
AddResult('Impossible de Charger "Dnsapi.dll"');
except
on E: Exception do
begin
AddResult(E.Message);
Result := False;
end;
end;
end;
end. |
