用VB可以抓IP包么？ Delphi应是用API实现吧？那VB也行呀！！！如是用VCL，那大不了写一个dll,在VB中调用。 解决方案 » 免费领取超大流量手机卡，每月29元包185G流量+100分钟通话, 中国电信官方发货 找到一个更改IP的DELPHI源代码，贴上来犒劳大家.一般来说，自定义IP头是通过使用socket的库函数setsockopt()的选项IP_HDRINCL来实现的，尽管这在unix和linux平台上很容易实现，但遗憾的是在Windows平台的Winsock1.1和Winsock2.0函数库里setsockopt()不支持IP_HDRINCL选项，所以在Windows 9x/NT里是无法通过Winsock函数库来实现IP头自定义的，当然可以通过编写虚拟设备驱动程序来实现，不过比较复杂，但Windows 2000的出现打破了这种局面，Windows2000的Winsock2.2函数库里全面支持setsockopt()的选项IP_HDRINCL，使得我们轻松就可以实现自定义的IP头。实现方法如下：四、代码部分{ 1. 本程序只能运行于 Window 2000.2. 你必须有 Administrator 权限.3. 程序需要用到一个 button 和一个 memo.----------------------------------------------------------------------运行程序前，请根据自己的需要改变 SrcIP、SrcPort、DestIP和DestPort的值 ----------------------------------------------------------------------如果你看不懂以下代码，最好不要去运行它。----------------------------------------------------------------------}unit Unit1;interfaceusesWindows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,StdCtrls, OleCtrls, Registry;ConstSrcIP = '123.123.123.1';//发送方IP地址SrcPort = 1234; //发送方端口DestIP = '127.0.0.2'; //目的IP地址DestPort = 4321; //目的端口Max_Message = 4068;Max_Packet = 4096;typeTPacketBuffer = Array[0..Max_Packet-1] of byte;TForm1 = class(TForm)Button1: TButton;Memo1: TMemo;procedure Button1Click(Sender: TObject);private{ Private declarations }public{ Public declarations }procedure SendIt;end;// IP 头typeT_IP_Header = recordip_verlen : Byte;ip_tos : Byte;ip_totallength : Word;ip_id : Word;ip_offset : Word;ip_ttl : Byte;ip_protocol : Byte;ip_checksum : Word;ip_srcaddr : LongWord;ip_destaddr : LongWord;end;// UDP 头TypeT_UDP_Header = recordsrc_portno : Word;dst_portno : Word;udp_length : Word;udp_checksum : Word;end;// 一些 Winsock 2 的类型声明u_char = Char;u_short = Word;u_int = Integer;u_long = Longint;SunB = packed records_b1, s_b2, s_b3, s_b4: u_char;end;SunW = packed records_w1, s_w2: u_short;end;in_addr = recordcase integer of0: (S_un_b: SunB);1: (S_un_w: SunW);2: (S_addr: u_long);end;TInAddr = in_addr;Sockaddr_in = recordcase Integer of0: (sin_family: u_short;sin_port: u_short;sin_addr: TInAddr;sin_zero: array[0..7] of Char);1: (sa_family: u_short;sa_data: array[0..13] of Char)end;TSockAddr = Sockaddr_in;TSocket = u_int;constWSADESCRIPTION_LEN = 256;WSASYS_STATUS_LEN = 128;typePWSAData = ^TWSAData;WSAData = record // WSDATAwVersion: Word;wHighVersion: Word;szDescription: array[0..WSADESCRIPTION_LEN] of Char;szSystemStatus: array[0..WSASYS_STATUS_LEN] of Char;iMaxSockets: Word;iMaxUdpDg: Word;lpVendorInfo: PChar;end;TWSAData = WSAData;//定义一些 winsock 2 函数function closesocket(s: TSocket): Integer; stdcall;function socket(af, Struct, protocol: Integer): TSocket; stdcall;function sendto(s: TSocket; var Buf; len, flags: Integer; var addrto: TSockAddr;tolen: Integer): Integer; stdcall;{}function setsockopt(s: TSocket; level, optname: Integer; optval: PChar;optlen: Integer): Integer; stdcall;function inet_addr(cp: PChar): u_long; stdcall; {PInAddr;} { TInAddr }function htons(hostshort: u_short): u_short; stdcall;function WSAGetLastError: Integer; stdcall;function WSAStartup(wVersionRequired: word; var WSData: TWSAData): Integer; stdcall;function WSACleanup: Integer; stdcall;constAF_INET = 2; // internetwork: UDP, TCP, etc.IP_HDRINCL = 2; // IP Header IncludeSOCK_RAW = 3; // raw-protocol interfaceIPPROTO_IP = 0; // dummy for IPIPPROTO_TCP = 6; // tcpIPPROTO_UDP = 17; // user datagram protocolIPPROTO_RAW = 255; // raw IP packetINVALID_SOCKET = TSocket(NOT(0));SOCKET_ERROR = -1;varForm1: TForm1;implementation// Import Winsock 2 functionsconst WinSocket = 'WS2_32.DLL';function closesocket; external winsocket name 'closesocket';function socket; external winsocket name 'socket';function sendto; external winsocket name 'sendto';function setsockopt; external winsocket name 'setsockopt';function inet_addr; external winsocket name 'inet_addr';function htons; external winsocket name 'htons';function WSAGetLastError; external winsocket name 'WSAGetLastError';function WSAStartup; external winsocket name 'WSAStartup';function WSACleanup; external winsocket name 'WSACleanup';{$R *.DFM}function CheckSum(Var Buffer; Size : integer) : Word;typeTWordArray = Array[0..1] of Word;varChkSum : LongWord;i : Integer;beginChkSum := 0;i := 0;While Size > 1 do beginChkSum := ChkSum + TWordArray(Buffer)[i];inc(i);Size := Size - SizeOf(Word);end;if Size=1 then ChkSum := ChkSum + Byte(TWordArray(Buffer)[i]);ChkSum := (ChkSum shr 16) + (ChkSum and $FFFF);ChkSum := ChkSum + (Chksum shr 16);Result := Word(ChkSum);end;procedure BuildHeaders(FromIP : String;iFromPort : Word;ToIP : String;iToPort : Word;StrMessage : String;Var Buf : TPacketBuffer;Var remote : TSockAddr;Var iTotalSize : Word);VardwFromIP : LongWord;dwToIP : LongWord;iIPVersion : Word;iIPSize : Word;ipHdr : T_IP_Header;udpHdr : T_UDP_Header;iUdpSize : Word;iUdpChecksumSize : Word;cksum : Word;Ptr : ^Byte;procedure IncPtr(Value : Integer);beginptr := pointer(integer(ptr) + Value);end;begin// Convert ip address'ssdwFromIP := inet_Addr(PChar(FromIP));dwToIP := inet_Addr(PChar(ToIP));// 初始化 IP 头//iTotalSize := sizeof(ipHdr) + sizeof(udpHdr) + length(strMessage);iIPVersion := 4;iIPSize := sizeof(ipHdr) div sizeof(LongWord);ipHdr.ip_verlen := (iIPVersion shl 4) or iIPSize;ipHdr.ip_tos := 0; // IP type of serviceipHdr.ip_totallength := htons(iTotalSize); // Total packet lenipHdr.ip_id := 0; // Unique identifier: set to 0ipHdr.ip_offset := 0; // Fragment offset fieldipHdr.ip_ttl := 128; // Time to liveipHdr.ip_protocol := $11; // Protocol(UDP)ipHdr.ip_checksum := 0 ; // IP checksumipHdr.ip_srcaddr := dwFromIP; // Source addressipHdr.ip_destaddr := dwToIP; // Destination address//// 初始化 UDP 头//iUdpSize := sizeof(udpHdr) + length(strMessage);udpHdr.src_portno := htons(iFromPort) ;udpHdr.dst_portno := htons(iToPort) ;udpHdr.udp_length := htons(iUdpSize) ;udpHdr.udp_checksum := 0 ;iUdpChecksumSize := 0;ptr := @buf[0];FillChar(Buf, SizeOf(Buf), 0);Move(ipHdr.ip_srcaddr, ptr^, SizeOf(ipHdr.ip_srcaddr));IncPtr(SizeOf(ipHdr.ip_srcaddr));iUdpChecksumSize := iUdpChecksumSize + sizeof(ipHdr.ip_srcaddr);Move(ipHdr.ip_destaddr, ptr^, SizeOf(ipHdr.ip_destaddr));IncPtr(SizeOf(ipHdr.ip_destaddr));iUdpChecksumSize := iUdpChecksumSize + sizeof(ipHdr.ip_destaddr);IncPtr(1);Inc(iUdpChecksumSize);Move(ipHdr.ip_protocol, ptr^, sizeof(ipHdr.ip_protocol));IncPtr(sizeof(ipHdr.ip_protocol));iUdpChecksumSize := iUdpChecksumSize + sizeof(ipHdr.ip_protocol);Move(udpHdr.udp_length, ptr^, sizeof(udpHdr.udp_length));IncPtr(sizeof(udpHdr.udp_length));iUdpChecksumSize := iUdpChecksumSize + sizeof(udpHdr.udp_length);move(udpHdr, ptr^, sizeof(udpHdr));IncPtr(sizeof(udpHdr));iUdpChecksumSize := iUdpCheckSumSize + sizeof(udpHdr);Move(StrMessage[1], ptr^, Length(strMessage));IncPtr(Length(StrMessage));iUdpChecksumSize := iUdpChecksumSize + length(strMessage);cksum := checksum(buf, iUdpChecksumSize);udpHdr.udp_checksum := cksum;//// 现在 IP 和 UDP 头OK了，我们可以把它发送出去。//FillChar(Buf, SizeOf(Buf), 0);Ptr := @Buf[0];Move(ipHdr, ptr^, SizeOf(ipHdr)); IncPtr(SizeOf(ipHdr));Move(udpHdr, ptr^, SizeOf(udpHdr)); IncPtr(SizeOf(udpHdr));Move(StrMessage[1], ptr^, length(StrMessage));remote.sin_family := AF_INET;remote.sin_port := htons(iToPort);remote.sin_addr.s_addr := dwToIP;end;procedure TForm1.SendIt;Varsh : TSocket;bOpt : Integer;ret : Integer;Buf : TPacketBuffer;Remote : TSockAddr;Local : TSockAddr;iTotalSize : Word;wsdata : TWSAdata;begin// Startup Winsock 2ret := WSAStartup($0002, wsdata);if ret<>0 then beginmemo1.lines.add('WSA Startup failed.');exit;end;with memo1.lines do beginadd('WSA Startup:');add('Desc.: '+wsData.szDescription);add('Status: '+wsData.szSystemStatus);end;try// Create socketsh := Socket(AF_INET, SOCK_RAW, IPPROTO_UDP);if (sh = INVALID_SOCKET) then beginmemo1.lines.add('Socket() failed: '+IntToStr(WSAGetLastError));exit;end;Memo1.lines.add('Socket Handle = '+IntToStr(sh));// Option: Header IncludebOpt := 1;ret := SetSockOpt(sh, IPPROTO_IP, IP_HDRINCL, @bOpt, SizeOf(bOpt));if ret = SOCKET_ERROR then beginMemo1.lines.add('setsockopt(IP_HDRINCL) failed: '+IntToStr(WSAGetLastError));exit;end;// Build the packetBuildHeaders( SrcIP, SrcPort,DestIP, DestPort,'THIS IS A TEST PACKET',Buf, Remote, iTotalSize );// Send the packetret := SendTo(sh, buf, iTotalSize, 0, Remote, SizeOf(Remote));if ret = SOCKET_ERROR thenMemo1.Lines.Add('sendto() failed: '+IntToStr(WSAGetLastError))elseMemo1.Lines.Add('send '+IntToStr(ret)+' bytes.');// Close socketCloseSocket(sh);finally// Close Winsock 2WSACleanup;end;end;procedure TForm1.Button1Click(Sender: TObject);beginSendIt;end;end. 求大家看看我传的一道题 用VB将文本框的内容导入内存 然后显示出来 类似“游戏：红色警戒”背景图片移动的问题。 VBA里怎么隐藏视图下面的工具拦中的最后一项 自定义 菜单项 答对马上给分！ 请教：该用什么样的空间呢？ ★★调用textBox控件的“撤消”功能 想表中插入记录 我有260分，我愿意给你：@*@ TDBGrid ??? 帮帮我!!!急...... vb6一个简单的固定内容字符串随机问题 字符串的匹配和分割? 关于DCOM能否在Internet网上调用问题？ 有关数据库的棘手问题
一般来说，自定义IP头是通过使用socket的库函数setsockopt()的选项IP_HDRINCL来实现的，尽管这在unix和linux平台上很容易实现，但遗憾的是在Windows平台的Winsock1.1和Winsock2.0函数库里setsockopt()不支持IP_HDRINCL选项，所以在Windows
9x/NT里是无法通过Winsock函数库来实现IP头自定义的，当然可以通过编写虚拟设备驱动程序来实现，不过比较复杂，但Windows
2000的出现打破了这种局面，Windows2000的Winsock2.2函数库里全面支持setsockopt()的选项IP_HDRINCL，使得我们轻松就可以实现自定义的IP头。实现方法如下：四、代码部分{ 1. 本程序只能运行于 Window 2000.2. 你必须有 Administrator 权限.3. 程序需要用到一个 button 和一个 memo.----------------------------------------------------------------------运行程序前，请根据自己的需要改变
SrcIP、SrcPort、DestIP和DestPort的值 ----------------------------------------------------------------------如果你看不懂以下代码，最好不要去运行它。----------------------------------------------------------------------}unit Unit1;interfaceusesWindows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,StdCtrls, OleCtrls, Registry;ConstSrcIP = '123.123.123.1';//发送方IP地址SrcPort = 1234;
//发送方端口DestIP = '127.0.0.2'; //目的IP地址DestPort = 4321; //目的端口Max_Message = 4068;Max_Packet = 4096;typeTPacketBuffer = Array[0..Max_Packet-1] of byte;TForm1 = class(TForm)Button1: TButton;Memo1: TMemo;procedure Button1Click(Sender: TObject);private{ Private declarations }public{ Public declarations }procedure SendIt;end;// IP 头typeT_IP_Header = recordip_verlen : Byte;ip_tos : Byte;ip_totallength : Word;ip_id : Word;ip_offset : Word;ip_ttl : Byte;ip_protocol : Byte;ip_checksum : Word;ip_srcaddr : LongWord;ip_destaddr : LongWord;end;// UDP 头TypeT_UDP_Header = recordsrc_portno : Word;dst_portno : Word;udp_length : Word;udp_checksum : Word;end;// 一些 Winsock 2 的类型声明u_char = Char;u_short = Word;u_int = Integer;u_long = Longint;SunB = packed records_b1, s_b2, s_b3, s_b4: u_char;end;SunW = packed records_w1, s_w2: u_short;end;in_addr = recordcase integer of0: (S_un_b: SunB);1: (S_un_w: SunW);2: (S_addr: u_long);end;TInAddr = in_addr;Sockaddr_in = recordcase Integer of0: (sin_family: u_short;sin_port: u_short;sin_addr: TInAddr;sin_zero: array[0..7] of Char);1: (sa_family: u_short;sa_data: array[0..13] of Char)end;TSockAddr = Sockaddr_in;TSocket = u_int;constWSADESCRIPTION_LEN = 256;WSASYS_STATUS_LEN = 128;typePWSAData = ^TWSAData;WSAData = record // WSDATAwVersion: Word;wHighVersion: Word;szDescription: array[0..WSADESCRIPTION_LEN] of Char;szSystemStatus: array[0..WSASYS_STATUS_LEN] of Char;iMaxSockets: Word;iMaxUdpDg: Word;lpVendorInfo: PChar;end;TWSAData = WSAData;//定义一些 winsock 2 函数function closesocket(s: TSocket): Integer; stdcall;function socket(af, Struct, protocol: Integer): TSocket; stdcall;function sendto(s: TSocket; var Buf; len, flags: Integer; var addrto: TSockAddr;tolen: Integer): Integer; stdcall;{}function setsockopt(s: TSocket; level, optname: Integer; optval: PChar;optlen: Integer): Integer; stdcall;function inet_addr(cp: PChar): u_long; stdcall; {PInAddr;} { TInAddr }function htons(hostshort: u_short): u_short; stdcall;function WSAGetLastError: Integer; stdcall;function WSAStartup(wVersionRequired: word; var WSData: TWSAData): Integer; stdcall;function WSACleanup: Integer; stdcall;constAF_INET = 2; // internetwork: UDP, TCP, etc.IP_HDRINCL = 2; // IP Header IncludeSOCK_RAW = 3; // raw-protocol interfaceIPPROTO_IP = 0; // dummy for IPIPPROTO_TCP = 6; // tcpIPPROTO_UDP = 17; // user datagram protocolIPPROTO_RAW = 255; // raw IP packetINVALID_SOCKET = TSocket(NOT(0));SOCKET_ERROR = -1;varForm1: TForm1;implementation// Import Winsock 2 functionsconst WinSocket = 'WS2_32.DLL';function closesocket; external winsocket name 'closesocket';function socket; external winsocket name 'socket';function sendto; external winsocket name 'sendto';function setsockopt; external winsocket name 'setsockopt';function inet_addr; external winsocket name 'inet_addr';function htons; external winsocket name 'htons';function WSAGetLastError; external winsocket name 'WSAGetLastError';function WSAStartup; external winsocket name 'WSAStartup';function WSACleanup; external winsocket name 'WSACleanup';{$R *.DFM}function CheckSum(Var Buffer; Size : integer) : Word;typeTWordArray = Array[0..1] of Word;varChkSum : LongWord;i : Integer;beginChkSum := 0;i := 0;While Size > 1 do beginChkSum := ChkSum + TWordArray(Buffer)[i];inc(i);Size := Size - SizeOf(Word);end;if Size=1 then ChkSum := ChkSum + Byte(TWordArray(Buffer)[i]);ChkSum := (ChkSum shr 16) + (ChkSum and $FFFF);ChkSum := ChkSum + (Chksum shr 16);Result := Word(ChkSum);end;procedure BuildHeaders(FromIP : String;iFromPort : Word;ToIP : String;iToPort : Word;StrMessage : String;Var Buf : TPacketBuffer;Var remote : TSockAddr;Var iTotalSize : Word);VardwFromIP : LongWord;dwToIP : LongWord;iIPVersion : Word;iIPSize : Word;ipHdr : T_IP_Header;udpHdr : T_UDP_Header;iUdpSize : Word;iUdpChecksumSize : Word;cksum : Word;Ptr : ^Byte;procedure IncPtr(Value : Integer);beginptr := pointer(integer(ptr) + Value);end;begin// Convert ip address'ssdwFromIP := inet_Addr(PChar(FromIP));dwToIP := inet_Addr(PChar(ToIP));// 初始化 IP 头//iTotalSize := sizeof(ipHdr) + sizeof(udpHdr) + length(strMessage);iIPVersion := 4;iIPSize := sizeof(ipHdr) div sizeof(LongWord);ipHdr.ip_verlen := (iIPVersion shl 4) or iIPSize;ipHdr.ip_tos := 0; // IP type of serviceipHdr.ip_totallength := htons(iTotalSize); // Total packet lenipHdr.ip_id := 0; // Unique identifier: set to 0ipHdr.ip_offset := 0; // Fragment offset fieldipHdr.ip_ttl := 128; // Time to liveipHdr.ip_protocol := $11; // Protocol(UDP)ipHdr.ip_checksum := 0 ; // IP checksumipHdr.ip_srcaddr := dwFromIP; // Source addressipHdr.ip_destaddr := dwToIP; // Destination address//// 初始化 UDP 头//iUdpSize := sizeof(udpHdr) + length(strMessage);udpHdr.src_portno := htons(iFromPort) ;udpHdr.dst_portno := htons(iToPort) ;udpHdr.udp_length := htons(iUdpSize) ;udpHdr.udp_checksum := 0 ;iUdpChecksumSize := 0;ptr := @buf[0];FillChar(Buf, SizeOf(Buf), 0);Move(ipHdr.ip_srcaddr, ptr^, SizeOf(ipHdr.ip_srcaddr));IncPtr(SizeOf(ipHdr.ip_srcaddr));iUdpChecksumSize := iUdpChecksumSize + sizeof(ipHdr.ip_srcaddr);Move(ipHdr.ip_destaddr, ptr^, SizeOf(ipHdr.ip_destaddr));IncPtr(SizeOf(ipHdr.ip_destaddr));iUdpChecksumSize := iUdpChecksumSize + sizeof(ipHdr.ip_destaddr);IncPtr(1);Inc(iUdpChecksumSize);Move(ipHdr.ip_protocol, ptr^, sizeof(ipHdr.ip_protocol));IncPtr(sizeof(ipHdr.ip_protocol));iUdpChecksumSize := iUdpChecksumSize + sizeof(ipHdr.ip_protocol);Move(udpHdr.udp_length, ptr^, sizeof(udpHdr.udp_length));IncPtr(sizeof(udpHdr.udp_length));iUdpChecksumSize := iUdpChecksumSize + sizeof(udpHdr.udp_length);move(udpHdr, ptr^, sizeof(udpHdr));IncPtr(sizeof(udpHdr));iUdpChecksumSize := iUdpCheckSumSize + sizeof(udpHdr);Move(StrMessage[1], ptr^, Length(strMessage));IncPtr(Length(StrMessage));iUdpChecksumSize := iUdpChecksumSize + length(strMessage);cksum := checksum(buf, iUdpChecksumSize);udpHdr.udp_checksum := cksum;//// 现在 IP 和 UDP 头OK了，我们可以把它发送出去。//FillChar(Buf, SizeOf(Buf), 0);Ptr := @Buf[0];Move(ipHdr, ptr^, SizeOf(ipHdr)); IncPtr(SizeOf(ipHdr));Move(udpHdr, ptr^, SizeOf(udpHdr)); IncPtr(SizeOf(udpHdr));Move(StrMessage[1], ptr^, length(StrMessage));remote.sin_family := AF_INET;remote.sin_port := htons(iToPort);remote.sin_addr.s_addr := dwToIP;end;procedure TForm1.SendIt;Varsh : TSocket;bOpt : Integer;ret : Integer;Buf : TPacketBuffer;Remote : TSockAddr;Local : TSockAddr;iTotalSize : Word;wsdata : TWSAdata;begin// Startup Winsock 2ret := WSAStartup($0002, wsdata);if ret<>0 then beginmemo1.lines.add('WSA Startup failed.');exit;end;with memo1.lines do beginadd('WSA Startup:');add('Desc.: '+wsData.szDescription);add('Status: '+wsData.szSystemStatus);end;try// Create socketsh := Socket(AF_INET, SOCK_RAW, IPPROTO_UDP);if (sh = INVALID_SOCKET) then beginmemo1.lines.add('Socket() failed: '+IntToStr(WSAGetLastError));exit;end;Memo1.lines.add('Socket Handle = '+IntToStr(sh));// Option: Header IncludebOpt := 1;ret := SetSockOpt(sh, IPPROTO_IP, IP_HDRINCL, @bOpt, SizeOf(bOpt));if ret = SOCKET_ERROR then beginMemo1.lines.add('setsockopt(IP_HDRINCL) failed: '+IntToStr(WSAGetLastError));exit;end;// Build the packetBuildHeaders( SrcIP, SrcPort,DestIP, DestPort,'THIS IS A TEST PACKET',Buf, Remote, iTotalSize );// Send the packetret := SendTo(sh, buf, iTotalSize, 0, Remote, SizeOf(Remote));if ret = SOCKET_ERROR thenMemo1.Lines.Add('sendto() failed: '+IntToStr(WSAGetLastError))elseMemo1.Lines.Add('send '+IntToStr(ret)+' bytes.');// Close socketCloseSocket(sh);finally// Close Winsock 2WSACleanup;end;end;procedure TForm1.Button1Click(Sender: TObject);beginSendIt;end;end.