我在Windows XP sp3上使用Delphi XE2 Update 4
我希望从已安装的网络适配器，特别是广播IP获取最大可能的信息。
为此，我使用了Jan Schulz的代码，我得到了from this article。
单元：
Unit USock;
Interface
Uses Windows, Winsock;
{ Unit to identify the network interfaces
This code requires at least Win98/ME/2K, 95 OSR 2 or NT service pack #3
as WinSock 2 is used (WS2_32.DLL) }
// Constants found in manual on non-officially documented M$ Winsock functions
Const SIO_GET_INTERFACE_LIST = $4004747F;
IFF_UP = $00000001;
IFF_BROADCAST = $00000002;
IFF_LOOPBACK = $00000004;
IFF_POINTTOPOINT = $00000008;
IFF_MULTICAST = $00000010;
Type SockAddr_Gen = Packed Record
AddressIn : SockAddr_In;
Padding : Packed Array [0..7] of Char;
end;
Interface_Info = Record
iiFlags : u_Long;
iiAddress : SockAddr_Gen;
iiBroadcastAddress : SockAddr_Gen;
iiNetmask : SockAddr_Gen;
end;
tNetworkInterface = Record
ComputerName : String;
AddrIP : String;
SubnetMask : String;
AddrNet : String;
AddrLimitedBroadcast : String;
AddrDirectedBroadcast : String;
IsInterfaceUp : Boolean;
BroadcastSupport : Boolean;
IsLoopback : Boolean;
end;
tNetworkInterfaceList = Array of tNetworkInterface;
Function WSAIoctl (aSocket : TSocket;
aCommand : DWord;
lpInBuffer : PChar;
dwInBufferLen : DWord;
lpOutBuffer : PChar;
dwOutBufferLen : DWord;
lpdwOutBytesReturned : LPDWord;
lpOverLapped : Pointer;
lpOverLappedRoutine : Pointer) : Integer; stdcall; external 'WS2_32.DLL';
Function GetNetworkInterfaces (Var aNetworkInterfaceList : tNetworkInterfaceList): Boolean;
Implementation
Function GetNetworkInterfaces (Var aNetworkInterfaceList : tNetworkInterfaceList): Boolean;
// Returns a complete list the of available network interfaces on a system (IPv4)
// Copyright by Dr. Jan Schulz, 23-26th March 2007
// This version can be used for free and non-profit projects. In any other case get in contact
// Written with information retrieved from MSDN
// www.code10.net
Var aSocket : TSocket;
aWSADataRecord : WSAData;
NoOfInterfaces : Integer;
NoOfBytesReturned : u_Long;
InterfaceFlags : u_Long;
NameLength : DWord;
pAddrIP : SockAddr_In;
pAddrSubnetMask : SockAddr_In;
pAddrBroadcast : Sockaddr_In;
pIPString : PChar;
pSubnetMaskString : PChar;
pLimBroadcastString : PChar;
pNetAddrString : PChar;
pDirBroadcastString : PChar;
DirBroadcastDummy : In_Addr;
NetAddrDummy : In_Addr;
Buffer : Array [0..30] of Interface_Info;
i : Integer;
Begin
Result := False;
SetLength (aNetworkInterfaceList, 0);
// Startup of old the WinSock
// WSAStartup ($0101, aWSADataRecord);
// Startup of WinSock2
WSAStartup(MAKEWORD(2, 0), aWSADataRecord);
// Open a socket
aSocket := Socket (AF_INET, SOCK_STREAM, 0);
// If impossible to open a socket, not worthy to go any further
If (aSocket = INVALID_SOCKET) THen Exit;
Try
If WSAIoCtl (aSocket, SIO_GET_INTERFACE_LIST, NIL, 0,
@Buffer, 1024, @NoOfBytesReturned, NIL, NIL) <> SOCKET_ERROR THen
Begin
NoOfInterfaces := NoOfBytesReturned Div SizeOf (Interface_Info);
SetLength (aNetworkInterfaceList, NoOfInterfaces);
// For each of the identified interfaces get:
For i := 0 to NoOfInterfaces - 1 do
Begin
With aNetworkInterfaceList[i] do
Begin
// Get the name of the machine
NameLength := MAX_COMPUTERNAME_LENGTH + 1;
SetLength (ComputerName, NameLength) ;
If Not Windows.GetComputerName (PChar (Computername), NameLength) THen ComputerName := '';
// Get the IP address
pAddrIP := Buffer[i].iiAddress.AddressIn;
pIPString := inet_ntoa (pAddrIP.Sin_Addr);
AddrIP := pIPString;
// Get the subnet mask
pAddrSubnetMask := Buffer[i].iiNetMask.AddressIn;
pSubnetMaskString := inet_ntoa (pAddrSubnetMask.Sin_Addr);
SubnetMask := pSubnetMaskString;
// Get the limited broadcast address
pAddrBroadcast := Buffer[i].iiBroadCastAddress.AddressIn;
pLimBroadcastString := inet_ntoa (pAddrBroadcast.Sin_Addr);
AddrLimitedBroadcast := pLimBroadcastString;
// Calculate the net and the directed broadcast address
NetAddrDummy.S_addr := Buffer[i].iiAddress.AddressIn.Sin_Addr.S_Addr;
NetAddrDummy.S_addr := NetAddrDummy.S_addr And Buffer[i].iiNetMask.AddressIn.Sin_Addr.S_Addr;
DirBroadcastDummy.S_addr := NetAddrDummy.S_addr Or Not Buffer[i].iiNetMask.AddressIn.Sin_Addr.S_Addr;
pNetAddrString := inet_ntoa ((NetAddrDummy));
AddrNet := pNetAddrString;
pDirBroadcastString := inet_ntoa ((DirBroadcastDummy));
AddrDirectedBroadcast := pDirBroadcastString;
// From the evaluation of the Flags we receive more information
InterfaceFlags := Buffer[i].iiFlags;
// Is the network interface up or down ?
If (InterfaceFlags And IFF_UP) = IFF_UP THen IsInterfaceUp := True
Else IsInterfaceUp := False;
// Does the network interface support limited broadcasts ?
If (InterfaceFlags And IFF_BROADCAST) = IFF_BROADCAST THen BroadcastSupport := True
Else BroadcastSupport := False;
// Is the network interface a loopback interface ?
If (InterfaceFlags And IFF_LOOPBACK) = IFF_LOOPBACK THen IsLoopback := True
Else IsLoopback := False;
end;
end;
end;
Except
Result := False;
end;
// Cleanup the mess
CloseSocket (aSocket);
WSACleanUp;
Result := True;
end;
end.
示例电话：
uses USock;
Procedure TForm1.Button1Click(Sender: TObject);
Var i : Integer;
aNetInterfaceList : tNetworkInterfaceList;
Begin
If (GetNetworkInterfaces (aNetInterfaceList)) THen
Begin
Memo1.Clear;
Memo1.Lines.Add (DateTimeToStr (Now)+ ' : ');
For i := 0 to High (aNetInterfaceList) do
Begin
Memo1.Lines.Add ('');
Memo1.Lines.Add ('# : ' + IntToStr(i));
Memo1.Lines.Add ('Name : ' + aNetInterfaceList[i].ComputerName);
Memo1.Lines.Add ('IP-Address : ' + aNetInterfaceList[i].AddrIP);
Memo1.Lines.Add ('Subnet mask : ' + aNetInterfaceList[i].SubnetMask);
Memo1.Lines.Add ('Net address : ' + aNetInterfaceList[i].AddrNet);
Memo1.Lines.Add ('Limited broadcast address : ' + aNetInterfaceList[i].AddrLimitedBroadcast);
Memo1.Lines.Add ('Directed Broadcast address : ' + aNetInterfaceList[i].AddrDirectedBroadcast);
Memo1.Lines.Add ('Interface up : ' + BoolToStr (aNetInterfaceList[i].IsInterfaceUp, True));
Memo1.Lines.Add ('Broadcast supported : ' + BoolToStr (aNetInterfaceList[i].BroadcastSupport, True));
Memo1.Lines.Add ('Loopback interface : ' + BoolToStr (aNetInterfaceList[i].IsLoopback, True));
Memo1.Lines.Add ('');
end;
end;
end;
代码显然有效，但它只返回一个网络接口，环回（127.0.0.0），它也应该返回我的网络专用接口。
在这部分代码中，它总是只返回一个可用的接口：
NoOfInterfaces：= NoOfBytesReturned Div SizeOf（Interface_Info）;
要使用XE2，我必须更改使用的字符串（AnsiString）。
我也尝试过使用Winsock2单元，并尝试使用IdWinSock2和那里的API调用。
在所有情况下，API都工作并仅返回环回接口。
使用在delphi上编写的另一个实用程序，我可以得到一个这个列表，并列出本地IP 192.168.0.112，但是这个源代码不容易使用。
我的问题是：出了什么问题？
Jan Schulz的代码在正确转换为unicode友好的Delphi时工作正常。
我做了一些修正：
char必须在必要时转换为AnsiChar。在这种情况下，这只发生在Padding记录的SockAddr_Gen字段中，这不仅会破坏记录，而且还会导致SizeOf(Interface_Info)和随后的NoOfInterfaces返回错误的结果。因为它不是真正的角色，所以最好将它定义为byte。PChars用于保存inet_ntoa调用的结果，并直接分配TNetworkInterface字符串字段。Strings的TNetworkInterface很好，因为他们没有被传递给任何api电话。此外，ComputerName传递给GetComputerName api，预计PWideChar / PChar。Unit USock;
Interface
Uses Windows, Winsock;
{ Unit to identify the network interfaces
This code requires at least Win98/ME/2K, 95 OSR 2 or NT service pack #3
as WinSock 2 is used (WS2_32.DLL) }
// Constants found in manual on non-officially documented M$ Winsock functions
Const SIO_GET_INTERFACE_LIST = $4004747F;
IFF_UP = $00000001;
IFF_BROADCAST = $00000002;
IFF_LOOPBACK = $00000004;
IFF_POINTTOPOINT = $00000008;
IFF_MULTICAST = $00000010;
Type SockAddr_Gen = Packed Record
AddressIn : SockAddr_In;
Padding : Packed Array [0..7] of Byte;
end;
Interface_Info = Record
iiFlags : u_Long;
iiAddress : SockAddr_Gen;
iiBroadcastAddress : SockAddr_Gen;
iiNetmask : SockAddr_Gen;
end;
tNetworkInterface = Record
ComputerName : String;
AddrIP : String;
SubnetMask : String;
AddrNet : String;
AddrLimitedBroadcast : String;
AddrDirectedBroadcast : String;
IsInterfaceUp : Boolean;
BroadcastSupport : Boolean;
IsLoopback : Boolean;
end;
tNetworkInterfaceList = Array of tNetworkInterface;
Function WSAIoctl (aSocket : TSocket;
aCommand : DWord;
lpInBuffer : Pointer;
dwInBufferLen : DWord;
lpOutBuffer : Pointer;
dwOutBufferLen : DWord;
lpdwOutBytesReturned : LPDWord;
lpOverLapped : Pointer;
lpOverLappedRoutine : Pointer) : Integer; stdcall; external 'WS2_32.DLL';
Function GetNetworkInterfaces (Var aNetworkInterfaceList : tNetworkInterfaceList): Boolean;
implementation
Function GetNetworkInterfaces (Var aNetworkInterfaceList : tNetworkInterfaceList): Boolean;
// Returns a complete list the of available network interfaces on a system (IPv4)
// Copyright by Dr. Jan Schulz, 23-26th March 2007
// This version can be used for free and non-profit projects. In any other case get in contact
// Written with information retrieved from MSDN
// www.code10.net
Var aSocket : TSocket;
aWSADataRecord : WSAData;
NoOfInterfaces : Integer;
NoOfBytesReturned : u_Long;
InterfaceFlags : u_Long;
NameLength : DWord;
pAddrIP : SockAddr_In;
pAddrSubnetMask : SockAddr_In;
pAddrBroadcast : Sockaddr_In;
DirBroadcastDummy : In_Addr;
NetAddrDummy : In_Addr;
Buffer : Array [0..30] of Interface_Info;
i : Integer;
Begin
Result := False;
SetLength (aNetworkInterfaceList, 0);
// Startup of old the WinSock
// WSAStartup ($0101, aWSADataRecord);
// Startup of WinSock2
WSAStartup(MAKEWORD(2, 0), aWSADataRecord);
// Open a socket
aSocket := Socket (AF_INET, SOCK_STREAM, 0);
// If impossible to open a socket, not worthy to go any further
If (aSocket = INVALID_SOCKET) THen Exit;
Try
If WSAIoCtl (aSocket, SIO_GET_INTERFACE_LIST, NIL, 0,
@Buffer, 1024, @NoOfBytesReturned, NIL, NIL) <> SOCKET_ERROR THen
Begin
NoOfInterfaces := NoOfBytesReturned Div SizeOf (Interface_Info);
SetLength (aNetworkInterfaceList, NoOfInterfaces);
// For each of the identified interfaces get:
For i := 0 to NoOfInterfaces - 1 do
Begin
With aNetworkInterfaceList[i] do
Begin
// Get the name of the machine
NameLength := MAX_COMPUTERNAME_LENGTH + 1;
SetLength (ComputerName, NameLength) ;
If Not GetComputerName (PChar (Computername), NameLength) THen ComputerName := '';
// Get the IP address
pAddrIP := Buffer[i].iiAddress.AddressIn;
AddrIP := string(inet_ntoa (pAddrIP.Sin_Addr));
// Get the subnet mask
pAddrSubnetMask := Buffer[i].iiNetMask.AddressIn;
SubnetMask := string(inet_ntoa (pAddrSubnetMask.Sin_Addr));
// Get the limited broadcast address
pAddrBroadcast := Buffer[i].iiBroadCastAddress.AddressIn;
AddrLimitedBroadcast := string(inet_ntoa (pAddrBroadcast.Sin_Addr));
// Calculate the net and the directed broadcast address
NetAddrDummy.S_addr := Buffer[i].iiAddress.AddressIn.Sin_Addr.S_Addr;
NetAddrDummy.S_addr := NetAddrDummy.S_addr And Buffer[i].iiNetMask.AddressIn.Sin_Addr.S_Addr;
DirBroadcastDummy.S_addr := NetAddrDummy.S_addr Or Not Buffer[i].iiNetMask.AddressIn.Sin_Addr.S_Addr;
AddrNet := string(inet_ntoa ((NetAddrDummy)));
AddrDirectedBroadcast := string(inet_ntoa ((DirBroadcastDummy)));
// From the evaluation of the Flags we receive more information
InterfaceFlags := Buffer[i].iiFlags;
// Is the network interface up or down ?
If (InterfaceFlags And IFF_UP) = IFF_UP THen IsInterfaceUp := True
Else IsInterfaceUp := False;
// Does the network interface support limited broadcasts ?
If (InterfaceFlags And IFF_BROADCAST) = IFF_BROADCAST THen BroadcastSupport := True
Else BroadcastSupport := False;
// Is the network interface a loopback interface ?
If (InterfaceFlags And IFF_LOOPBACK) = IFF_LOOPBACK THen IsLoopback := True
Else IsLoopback := False;
end;
end;
end;
Except
//Result := False;
end;
// Cleanup the mess
CloseSocket (aSocket);
WSACleanUp;
Result := True;
end;
end.
值得一提的是，如果您需要特定适配器的广播IP，您可以使用SIO_GET_BROADCAST_ADDRESS。
话虽如此，非Winsock解决方案将使用GetAdaptersInfo()或GetAdaptersAddresses()。这样，您不必创建SOCKET来获取信息，您可以同时枚举IPv4和IPv6适配器，以及Winsock无法识别的其他适配器。
对于GetAdaptersInfo()，IP_ADAPTER_INFO.IpAddressList列表包含IPv4 IP和子网掩码（在XP +上，单向适配器包含在输出中，但您可以使用GetUniDirectionalAdapterInfo()将其过滤掉）。
对于GetAdaptersAddresses()，IP_ADAPTER_ADDRESSES.FirstUnicastAddress列表包含IPv4和IPv6 IP以及Vista +上的IPv4子网掩码。对于XP及更早版本，您可以使用GetIpAddrTable()检索IPv4子网掩码，并将它们与GetAdaptersAddresses()的IPv4 IP匹配。
拥有IPv4 IP和子网掩码后，计算其广播IP非常简单：
BroadcastIP := (IP and SubnetMask) or (not SubnetMask);
在Remy Lebeau的消化和帮助记录这个线程后，我在delphi中发现了这个源代码，用XP和W7测试，它使用GetAdaptersInfo（）来获取信息。
Markus Humm original post更新了Brad Prendergast final version的积分
我添加了子网掩码报告，以便向像我这样存储信息的新手说明：
uses IpHlpApi, IpTypes;
procedure RetrieveLocalAdapterInformation(strings: TStrings);
var
pAdapterInfo, pTempAdapterInfo: PIP_ADAPTER_INFO;
AdapterInfo: IP_ADAPTER_INFO;
BufLen: DWORD;
Status: DWORD;
strMAC: String;
i: Integer;
begin
strings.Clear;
BufLen:= sizeof(AdapterInfo);
pAdapterInfo:= @AdapterInfo;
Status:= GetAdaptersInfo(nil, BufLen);
pAdapterInfo:= AllocMem(BufLen);
try
Status:= GetAdaptersInfo(pAdapterInfo, BufLen);
if (Status <> ERROR_SUCCESS) then
begin
case Status of
ERROR_NOT_SUPPORTED:
strings.Add('GetAdaptersInfo is not supported by the operating ' +
'system running on the local computer.');
ERROR_NO_DATA:
strings.Add('No network adapter on the local computer.');
else
strings.Add('GetAdaptersInfo failed with error #' + IntToStr(Status));
end;
Dispose(pAdapterInfo);
Exit;
end;
while (pAdapterInfo <> nil) do
begin
strings.Add('Description: ' + pAdapterInfo^.Description);
strings.Add('Name: ' + pAdapterInfo^.AdapterName);
strMAC := '';
for I := 0 to pAdapterInfo^.AddressLength - 1 do
strMAC := strMAC + '-' + IntToHex(pAdapterInfo^.Address[I], 2);
Delete(strMAC, 1, 1);
strings.Add('MAC address: ' + strMAC);
strings.Add('IP address: ' + pAdapterInfo^.IpAddressList.IpAddress.S);
strings.Add('IP subnet mask: ' + pAdapterInfo^.IpAddressList.IpMask.S);
strings.Add('Gateway: ' + pAdapterInfo^.GatewayList.IpAddress.S);
strings.Add('DHCP enabled: ' + IntTOStr(pAdapterInfo^.DhcpEnabled));
strings.Add('DHCP: ' + pAdapterInfo^.DhcpServer.IpAddress.S);
strings.Add('Have WINS: ' + BoolToStr(pAdapterInfo^.HaveWins,True));
strings.Add('Primary WINS: ' + pAdapterInfo^.PrimaryWinsServer.IpAddress.S);
strings.Add('Secondary WINS: ' + pAdapterInfo^.SecondaryWinsServer.IpAddress.S);
pTempAdapterInfo := pAdapterInfo;
pAdapterInfo:= pAdapterInfo^.Next;
if assigned(pAdapterInfo) then Dispose(pTempAdapterInfo);
end;
finally
Dispose(pAdapterInfo);
end;
end;
当您将String声明更改为AnsiString时，也将Char声明更改为AnsiChar。
procedure TForm4.RetrieveLocalAdapterInformation;
var
pAdapterInfo: PIP_ADAPTER_INFO;
AdapterInfo: IP_ADAPTER_INFO;
BufLen: DWORD;
Status: DWORD;
strMAC: String;
i: Integer;
strings: TStrings;
begin
strings:= Tstringlist.create;
strings.Clear;
BufLen:= sizeof(AdapterInfo);
pAdapterInfo:= @AdapterInfo;
Status:= GetAdaptersInfo(nil, BufLen);
pAdapterInfo:= AllocMem(BufLen);
try
Status:= GetAdaptersInfo(pAdapterInfo, BufLen);
if (Status <> ERROR_SUCCESS) then
begin
case Status of
ERROR_NOT_SUPPORTED:
strings.Add('GetAdaptersInfo is not supported by the operating ' +
'system running on the local computer.');
ERROR_NO_DATA:
strings.Add('No network adapter on the local computer.');
else
strings.Add('GetAdaptersInfo failed with error #' + IntToStr(Status));
end;
Dispose(pAdapterInfo);
Exit;
end;
while (pAdapterInfo <> nil) do
begin
memo1.Lines.Add('');
memo1.Lines.Add('Description: ------------------------' + pAdapterInfo^.Description);
memo1.Lines.Add('Name: ' + pAdapterInfo^.AdapterName);
strMAC := '';
for I := 0 to pAdapterInfo^.AddressLength - 1 do
strMAC := strMAC + '-' + IntToHex(pAdapterInfo^.Address[I], 2);
Delete(strMAC, 1, 1);
memo1.Lines.Add('MAC address: ' + strMAC);
memo1.Lines.Add('IP address: ' + pAdapterInfo^.IpAddressList.IpAddress.S);
memo1.Lines.Add('IP subnet mask: ' + pAdapterInfo^.IpAddressList.IpMask.S);
memo1.Lines.Add('Gateway: ' + pAdapterInfo^.GatewayList.IpAddress.S);
memo1.Lines.Add('DHCP enabled: ' + IntTOStr(pAdapterInfo^.DhcpEnabled));
memo1.Lines.Add('DHCP: ' + pAdapterInfo^.DhcpServer.IpAddress.S);
memo1.Lines.Add('Have WINS: ' + BoolToStr(pAdapterInfo^.HaveWins,True));
memo1.Lines.Add('Primary WINS: ' + pAdapterInfo^.PrimaryWinsServer.IpAddress.S);
memo1.Lines.Add('Secondary WINS: ' + pAdapterInfo^.SecondaryWinsServer.IpAddress.S);
pAdapterInfo:= pAdapterInfo^.Next;
end;
finally
Dispose(pAdapterInfo);
strings.free;
end;
end;
procedure TForm4.Button1Click(Sender: TObject);
begin
RetrieveLocalAdapterInformation//
end;