400RMB 求用winpcap 抓取网络数据包并提取出http数据包内容

yorker0503 · 发表于 2012-10-15 05:56:51

这个源代码实现了抓取指定网卡数据包并解释报文头的功能，但不能够像wireshark一样解码出报文内容，如：
GET /cgi-bin/getcomposedata?&t=compose_data_json&fun=compose&error=app&f=xhtml&apv=0.9.8&sid=obMO7mhKmf_EaGY2RrHTyfNf,4,zbIpjeD0D HTTP/1.1
Host: i.mail.qq.com
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Mobile/9A405
Cookie: new_mail_num=241600018&693;qm_username=241600018;appkey=e249624a;k=1833;curuin=241600018
Accept: */*
Accept-Language: zh-cn
Accept-Encoding: gzip, deflate
Connection: keep-alive

我想请高手修改此源代码，从抓取到的包里解析出http内容。

源代码：winpcap_demo.au3

; Winpcap autoit3 UDF demo - V1.2c
; Copyleft GPL3 Nicolas Ricquemaque 2009-2011

#include <Array.au3>
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#Include <GuiListView.au3>
#include <StaticConstants.au3>
#include <ComboConstants.au3>

#include <Winpcap.au3>

$winpcap=_PcapSetup()
If ($winpcap=-1) Then
        MsgBox(16,"Pcap error !","WinPcap not found !")
        exit
EndIf

$pcap_devices=_PcapGetDeviceList()
If ($pcap_devices=-1) Then
        MsgBox(16,"PcapGetDevice error !",_PcapGetLastError())
        exit
EndIf

GUICreate("Packet capture", 500, 350)
$interface=GUICtrlCreateCombo("", 80, 15, 400,default,$CBS_DROPDOWNLIST)
GUICtrlSetData(-1, "Pcap capture file")
For $i = 0 to Ubound($pcap_devices)-1
        GUICtrlSetData(-1, $pcap_devices[$i][1])
Next
$filter=GUICtrlCreateInPut ("tcp port 80", 80, 45, 300) 
$promiscuous=GUICtrlCreateCheckbox ( "promiscuous", 400, 45)
$start=GUICtrlCreateButton ( "Start", 20, 310, 60)
$stop=GUICtrlCreateButton ( "Stop", 110, 310,60) 
GUICtrlSetState (-1, $GUI_DISABLE )
$clear=GUICtrlCreateButton ( "Clear", 200, 310,60) 
$stats=GUICtrlCreateButton ( "Stats", 290, 310,60) 
GUICtrlSetState (-1, $GUI_DISABLE )
$save=GUICtrlCreateCheckbox ( "Save packets", 395, 310,90,30)
GUICtrlSetStyle(GUICtrlCreateLabel ( "Interface :", 10, 20, 60),$SS_RIGHT)
GUICtrlSetStyle(GUICtrlCreateLabel ( "Filter :", 10, 50, 60),$SS_RIGHT)
$packetwindow = GUICtrlCreateListView("No|Time|Len|Packet", 10, 90, 480, 200)
_GUICtrlListView_SetColumn($packetwindow,0,"No",40,1)
_GUICtrlListView_SetColumnWidth($packetwindow, 1, 80)
_GUICtrlListView_SetColumn($packetwindow,2,"Len",40,1)
_GUICtrlListView_SetColumnWidth($packetwindow, 3, 300)

GUISetState()

$i=0
$pcap=0
$packet=0
$pcapfile=0

Do
        $msg = GUIGetMsg()
        If ($msg=$start) Then
                If GUICtrlRead($promiscuous)=$GUI_CHECKED Then
                        $prom=1
                Else
                        $prom=0
                EndIf                
                $int=""
                If (GUICtrlRead($interface)="Pcap capture file") Then
                        $file=FileOpenDialog ( "Pcap file to open ?", ".", "Pcap (*.pcap)|All files (*.*)" ,1 )
                        If $file="" Then ContinueLoop
                        $int="file://"&$file
                Else                        
                        For $n = 0 to Ubound($pcap_devices)-1
                                If $pcap_devices[$n][1]=GUICtrlRead($interface) Then
                                        $int=$pcap_devices[$n][0]
                                        ExitLoop
                                EndIf
                        Next
                EndIf
                $pcap=_PcapStartCapture($int,GUICtrlRead($filter),$prom)
                If ($pcap=-1) Then
                        MsgBox(16,"Pcap error !",_PcapGetLastError())
                        ContinueLoop
                EndIf
                $linktype=_PcapGetLinkType($pcap)        
                If ($linktype[1]<>"EN10MB") Then
                        MsgBox(16,"Pcap error !","This example only works for Ethernet captures")
                        ContinueLoop
                Endif
                If GUICtrlRead($save)=$GUI_CHECKED Then
                        $file=FileSaveDialog ( "Pcap file to write to ?", ".", "Pcap (*.pcap)" ,16 )
                        If ($file<>"") Then 
                                If StringLower(StringRight($file,5))<>".pcap" Then $file&=".pcap"
                                $pcapfile=_PcapSaveToFile($pcap,$file)
                                If ($pcapfile=0) Then MsgBox(16,"Pcap error !",_PcapGetLastError())
                        EndIf
                EndIf                
                GUICtrlSetState ($stop, $GUI_ENABLE)
                GUICtrlSetState ($stats, $GUI_ENABLE)
                GUICtrlSetState ($start, $GUI_DISABLE)
                GUICtrlSetState ($save, $GUI_DISABLE)
        EndIf
        
        If ($msg=$stop) Then
                If IsPtr($pcapfile) Then 
                        _PcapStopCaptureFile($pcapfile)
                        $pcapfile=0
                EndIf
                if Not IsInt($pcap) Then _PcapStopCapture($pcap)
                $pcap=0
                GUICtrlSetState ($stop, $GUI_DISABLE)
                GUICtrlSetState ($stats, $GUI_DISABLE)
                GUICtrlSetState ($start, $GUI_ENABLE)
                GUICtrlSetState ($save, $GUI_ENABLE)
        EndIf
        
        If ($msg=$clear) Then
                _PcapGetStats($pcap)
                _GUICtrlListView_DeleteAllItems($packetwindow)
                $i=0
        EndIf
        
        If ($msg=$stats) Then
                $s=_PcapGetStats($pcap)
                _ArrayDisplay($s,"Capture statistics")
        EndIf
        
        If IsPtr($pcap) Then         ; If $pcap is a Ptr, then the capture is running
                $time0=TimerInit()
                While (TimerDiff($time0)<500) ; Retrieve packets from queue for maximum 500ms before returning to main loop, not to "hang" the window for user
                        $packet=_PcapGetPacket($pcap)
                        If IsInt($packet) Then ExitLoop
                        GUICtrlCreateListViewItem($i&"|"&StringTrimRight($packet[0],4)&"|"&$packet[2]&"|"&MyDissector($packet[3]), $packetwindow)
                        $data=$packet[3]
                        _GUICtrlListView_EnsureVisible($packetwindow, $i)
                        $i+=1
                        If IsPtr($pcapfile) Then _PcapWriteLastPacket($pcapfile)
                Wend
        EndIf
        
Until $msg=$GUI_EVENT_CLOSE

If IsPtr($pcapfile) Then _PcapStopCaptureFile($pcapfile)        ; A file is still open: close it
if IsPtr($pcap) Then _PcapStopCapture($pcap)        ; A capture is still running: close it
_PcapFree()        

Exit



Func MyDissector ($data) ; Quick example packet dissector....
        Local $macdst=StringMid ($data,3,2)&":"&StringMid ($data,5,2)&":"&StringMid ($data,7,2)&":"&StringMid ($data,9,2)&":"&StringMid ($data,11,2)&":"&StringMid ($data,13,2)
        Local $macsrc=StringMid ($data,15,2)&":"&StringMid ($data,17,2)&":"&StringMid ($data,19,2)&":"&StringMid ($data,21,2)&":"&StringMid ($data,23,2)&":"&StringMid ($data,25,2)
        Local $ethertype=BinaryMid ( $data, 13 ,2 )
        
        If $ethertype="0x0806" Then return "ARP "&$macsrc&" -> "&$macdst

        If $ethertype="0x0800" Then
                Local $src=Number(BinaryMid ($data, 27 ,1))&"."&Number(BinaryMid ($data, 28 ,1))&"."&Number(BinaryMid ($data, 29 ,1))&"."&Number(BinaryMid ($data, 30 ,1))
                Local $dst=Number(BinaryMid ($data, 31 ,1))&"."&Number(BinaryMid ($data, 32 ,1))&"."&Number(BinaryMid ($data, 33 ,1))&"."&Number(BinaryMid ($data, 34 ,1))
                Switch BinaryMid ($data, 24 ,1)
                        Case "0x01"
                           return "ICMP "&$src&" -> "&$dst
                        Case "0x02"
                           return "IGMP "&$src&" -> "&$dst
                        Case "0x06"
                                Local $srcport=Number(BinaryMid ($data, 35 ,1))*256+Number(BinaryMid ($data, 36 ,1))
                                Local $dstport=Number(BinaryMid ($data, 37 ,1))*256+Number(BinaryMid ($data, 38 ,1))
                                Local $flags=BinaryMid ($data, 48 ,1)
                                Local $f=""
                                If BitAND($flags,0x01) Then $f="Fin "
                                If BitAND($flags,0x02) Then $f&="Syn "
                                If BitAND($flags,0x04) Then $f&="Rst "
                                If BitAND($flags,0x08) Then $f&="Psh "
                                If BitAND($flags,0x10) Then $f&="Ack "
                                If BitAND($flags,0x20) Then $f&="Urg "
                                If BitAND($flags,0x40) Then $f&="Ecn "
                                If BitAND($flags,0x80) Then $f&="Cwr "
                                $f=StringTrimRight(StringReplace($f," ",","),1)                
                                return "TCP("&$f&") "&$src&":"&$srcport&" -> "&$dst&":"&$dstport
                        Case "0x11"
                                Local $srcport=Number(BinaryMid ($data, 35 ,1))*256+Number(BinaryMid ($data, 36 ,1))
                                Local $dstport=Number(BinaryMid ($data, 37 ,1))*256+Number(BinaryMid ($data, 38 ,1))
                                return "UDP "&$src&":"&$srcport&" -> "&$dst&":"&$dstport
                        Case Else
                                return "IP "&BinaryMid ($data, 24 ,1)&" "&$src&" -> "&$dst
                EndSwitch
                return BinaryMid ( $data, 13 ,2 )&" "&$src&" -> "&$dst
        EndIf

        If $ethertype="0x8137" OR $ethertype="0x8138" OR $ethertype="0x0022" OR $ethertype="0x0025" OR $ethertype="0x002A" OR $ethertype="0x00E0" OR $ethertype="0x00FF" Then
                return "IPX "&$macsrc&" -> "&$macdst
        EndIf

        return "["&$ethertype&"] "&$macsrc&" -> "&$macdst
EndFunc

引用文件 winpcap.au3

; Winpcap autoit3 UDF - V1.2c
; Copyleft GPL3 Nicolas Ricquemaque 2009-2011
#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_Run_AU3Check=n
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****
; *********************** Initialisation functions **************************
Global $Pcap_dll
Global $Pcap_errbuf
Global $Pcap_ptrhdr
Global $Pcap_ptrpkt
Global $Pcap_statV                ; Total volume captured
Global $Pcap_statN                ; Total number of packets captured
Global $Pcap_starttime        ; Start time of Capture
Global $Pcap_timebias


Func _PcapSetup()        ; return WinPCAP version as full text or -1 if winpcap is not installed, and opens dll
        If Not FileExists( @SystemDir & "\wpcap.dll") Then return -1
        $Pcap_dll=DllOpen ( @SystemDir & "\wpcap.dll" )
        $Pcap_errbuf = DLLStructCreate("char[256]")
        $Pcap_ptrhdr=0
        $Pcap_ptrpkt=0
        $Pcap_timebias = (2^32 - RegRead("HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation", "ActiveTimeBias")) * 60
        Local $v = DllCall($Pcap_dll, "str:cdecl", "pcap_lib_version")
        if (@error > 0) Then return -1        
        return $v[0]
EndFunc


Func _PcapFree()                ; free resources opened by _PcapSetup
        DllClose($Pcap_dll)
EndFunc

; *********************** Information functions **************************

Func _PcapGetLastError($pcap=0)          ; returns text from last pcap error
        If NOT IsPtr($pcap) Then return DllStructGetData($Pcap_errbuf,1)
        Local $v = DllCall($Pcap_dll, "str:cdecl", "pcap_geterr","ptr",$pcap)
        return DllStructGetData($Pcap_errbuf,1)&$v[0]
EndFunc


Func _PcapGetDeviceList() ; returns 2D array with pcap devices (name;desc;mac;ipv4_addr;ipv4_netmask;ipv4_broadaddr;ipv6_addr;ipv6_netmask;ipv6_broadaddr;flags) or -1 if error
        Local $alldevs=DLLStructCreate("ptr")
        Local $r=DllCall($Pcap_dll, "int:cdecl", "pcap_findalldevs_ex", "str", "rpcap://", "ptr", 0, "ptr", DllStructGetPtr($alldevs), "ptr", DllStructGetPtr($Pcap_errbuf))
        if (@error > 0) Then return -1
        if $r[0]=-1 Then return -1
        Local $next=DllStructGetData($alldevs,1)
        Local $list[1][14]
        Local $i=0;
        while ($next<>0)
                Local $pcap_if = DllStructCreate("ptr next;ptr name;ptr desc;ptr addresses;uint flags",$next)
                Local $len_name = DllCall("kernel32.dll", "int", "lstrlen", "ptr", DllStructGetData($pcap_if,2))  
                Local $len_desc = DllCall("kernel32.dll", "int", "lstrlen", "ptr", DllStructGetData($pcap_if,3))         
                $list[$i][0]=DllStructGetData(DllStructCreate("char["&($len_name[0]+1)&"]",DllStructGetData($pcap_if,2)),1)        
                $list[$i][1]=DllStructGetData(DllStructCreate("char["&($len_desc[0]+1)&"]",DllStructGetData($pcap_if,3)),1)        
                Local $next_addr=DllStructGetData($pcap_if,"addresses")
                
                ; retrieve mac address
                Local $device=StringTrimLeft($list[$i][0],8)
                Local $snames = DllStructCreate("char Name["&(StringLen($device)+1)&"]")
                DllStructSetData($snames,1,$device)
                Local $handle=DllCall("packet.dll", "ptr:cdecl", "PacketOpenAdapter", "ptr", DllStructGetPtr($snames))        
                If IsPtr($handle[0]) Then
                        Local $packetoiddata = DllStructCreate("ulong oid;ulong length;ubyte data[6]")
                        DllStructSetData($packetoiddata,1,0x01010102)  ; OID_802_3_CURRENT_ADDRESS
                        DllStructSetData($packetoiddata,2,6)
                        Local $status=DllCall("packet.dll", "byte:cdecl", "PacketRequest", "ptr", $handle[0],"byte",0,"ptr",DllStructGetPtr($packetoiddata))
                        If $status[0] Then
                                Local $mac=DllStructGetData($packetoiddata,3)
                                $list[$i][6]=StringMid($mac,3,2)&":"&StringMid($mac,5,2)&":"&StringMid($mac,7,2)&":"&StringMid($mac,9,2)&":"&StringMid($mac,11,2)&":"&StringMid($mac,13,2)
                        EndIf                
                        Local $nettype = DllStructCreate("uint type;uint64 speed")
                        $status=DllCall("packet.dll", "byte:cdecl", "PacketGetNetType", "ptr", $handle[0], "ptr", DllStructGetPtr($nettype)) 
                        If $status[0] Then
                                $list[$i][5]=DllStructGetData($nettype,2)
                        EndIf
                        DllCall("packet.dll", "none:cdecl", "PacketCloseAdapter", "ptr", $handle[0])
                EndIf
                
                ; retrieve lintypes
                Local $pcap=_PcapStartCapture($list[$i][0],"host 1.2.3.4",0,32)
                If IsPtr($pcap) Then
                        Local $types=_PcapGetLinkType($pcap)
                        If IsArray($types) Then
                                $list[$i][2]=$types[0]
                                $list[$i][3]=$types[1]
                                $list[$i][4]=$types[2]
                        EndIf
                        _PcapStopCapture($pcap)
                EndIf
                
                ; retrieve ip addresses
                while $next_addr<>0
                        Local $pcap_addr = DllStructCreate("ptr next;ptr addr;ptr netmask;ptr broadaddr;ptr dst",$next_addr)                        
                        Local $j,$addr
                        For $j=2 to 4
                                $addr=_PcapSock2addr(DllStructGetData($pcap_addr,$j))
                                If StringLen($addr)>15 Then 
                                        $list[$i][$j+8]=$addr
                                ElseIf StringLen($addr)>6 Then 
                                        $list[$i][$j+5]=$addr
                                EndIf
                        Next
                        $next_addr=DllStructGetData($pcap_addr,1)
                Wend
                
                $list[$i][13]=DllStructGetData($pcap_if,5)
                $next=DllStructGetData($pcap_if,1)
                $i+=1
                if $next<>0 Then Redim $list[$i+1][14]        
        Wend
        DllCall($Pcap_dll, "none:cdecl", "pcap_freealldevs", "ptr", DllStructGetData($alldevs,1))
        return $list
EndFunc


Func _PcapGetLinkType($pcap) ; returns a array with LinkType for opened capture $pcap. [0]: int value of link type, [1] name of linktype, [2] description of linktype
        If NOT IsPtr($pcap) Then return -1
        Local $type[3]
        Local $t=DllCall($Pcap_dll, "int:cdecl", "pcap_datalink", "ptr", $pcap)
        $type[0]=$t[0]
        Local $name=DllCall($Pcap_dll, "str:cdecl", "pcap_datalink_val_to_name", "int", $t[0])
        $type[1]=$name[0]
        Local $desc=DllCall($Pcap_dll, "str:cdecl", "pcap_datalink_val_to_description", "int", $t[0])
        $type[2]=$desc[0]
        return $type
EndFunc


Func _PcapListLinkTypes($pcap) ; returns a 2D array with possible LinkTypes for opened capture $pcap. For each one: [0]: int value of link type, [1] name of linktype, [2] description of linktype
        If NOT IsPtr($pcap) Then return -1
        Local $ptr=DLLStructCreate("ptr")
        Local $n=DllCall($Pcap_dll, "int:cdecl", "pcap_list_datalinks", "ptr", $pcap,"ptr",DllStructGetPtr($ptr))
        if $n[0]<1 then return -1
        Local $dlts=DLLStructCreate("int["&$n[0]&"]",DllStructGetData($ptr,1))
        Local $i,$name,$desc
        Local $types[$n[0]][3]
        For $i=0 to $n[0]-1
                $types[$i][0]=DllStructGetData($dlts,1,$i+1)
                $name=DllCall($Pcap_dll, "str:cdecl", "pcap_datalink_val_to_name", "int", $types[$i][0])
                $types[$i][1]=$name[0]
                $desc=DllCall($Pcap_dll, "str:cdecl", "pcap_datalink_val_to_description", "int", $types[$i][0])
                $types[$i][2]=$desc[0]
        Next
        return $types
EndFunc


Func _PcapSetLinkType($pcap,$dlt)
        If NOT IsPtr($pcap) Then return -1
        Local $n=DllCall($Pcap_dll, "int:cdecl", "pcap_set_datalink", "ptr", $pcap,"int",$dlt)
        return $n[0]
EndFunc


Func _PcapGetStats($pcap) ; returns array [0]=received packets [1]=droped packets by driver [2]=dropped packets by if [3]=captured packets [4]=Captured volume in bytes [5]=time in ms since beginning
If NOT IsPtr($pcap) Then return -1
Local $statsize=DLLStructCreate("int")
Local $s=DllCall($Pcap_dll, "ptr:cdecl", "pcap_stats_ex", "ptr", $pcap, "ptr", DllStructGetPtr($statsize))
If $s[0]=0 Then return -1
Local $stats=DLLStructCreate("uint recv;uint drop;uint ifdrop;uint capt",$s[0])
Local $ps[6][2]
$ps[0][0]=DllStructGetData($stats,1)
$ps[0][1]="Packets received by Interface"
$ps[1][0]=DllStructGetData($stats,2)
$ps[1][1]="Packets dropped by WinPcap"
$ps[2][0]=DllStructGetData($stats,3)
$ps[2][1]="Packets dropped by Interface"
$ps[3][0]=DllStructGetData($stats,4)
$ps[3][1]="Packets captured"
$ps[4][0]=$PCap_statV
$ps[4][1]="Bytes in packets captured"
$ps[5][0]=int(TimerDiff($Pcap_starttime))
$ps[5][1]="mS since capture start"
return $ps
EndFunc

; *********************** Capture functions **************************

Func _PcapStartCapture($DeviceName,$filter="",$promiscuous=0,$PacketLen=65536,$buffersize=0,$realtime=1)        ; start a capture in non-blocking mode on device $DeviceName with optional parameters: $PacketLen, $promiscuous, $filter. Returns -1 on failure or pcap handler
        Local $handle=DllCall($Pcap_dll, "ptr:cdecl", "pcap_open", "str", $DeviceName, "int", $PacketLen, "int",$promiscuous,"int",1000,"ptr",0,"ptr", DllStructGetPtr($Pcap_errbuf) )
        if (@error > 0) Then return -1
        if ($handle[0] = 0) Then return -1
        DllCall($Pcap_dll, "int:cdecl", "pcap_setnonblock", "ptr", $handle[0], "int", 1, "ptr", DllStructGetPtr($Pcap_errbuf))
        if ($filter<>"") Then
                Local $fcode=DLLStructCreate("UINT;ptr")
                Local $comp=DllCall($Pcap_dll, "int:cdecl", "pcap_compile", "ptr", $handle[0], "ptr", DllStructGetPtr($fcode), "str", $filter,"int", 1, "int",0)
                if ($comp[0]=-1) Then
                        Local $v = DllCall($Pcap_dll, "str:cdecl", "pcap_geterr","ptr",$handle[0])
                        DLLStructSetData($Pcap_errbuf,1,"Filter: "&$v[0])
                        _PcapStopCapture($handle[0])
                        return -1
                EndIf
                Local $set=DllCall($Pcap_dll, "int:cdecl", "pcap_setfilter", "ptr", $handle[0], "ptr", DllStructGetPtr($fcode))
                if ($set[0]=-1) Then
                        Local $v = DllCall($Pcap_dll, "str:cdecl", "pcap_geterr","ptr",$handle[0])
                        DLLStructSetData($Pcap_errbuf,1,"Filter: "&$v[0])
                        _PcapStopCapture($handle[0])
                        return -1
                DllCall($Pcap_dll, "none:cdecl", "pcap_freecode", "ptr", $fcode) 
                EndIf        
        EndIf
        If $buffersize>0 Then DllCall($Pcap_dll, "int:cdecl", "pcap_setbuff", "ptr", $handle[0], "int", $buffersize)   
        If $realtime Then DllCall($Pcap_dll, "int:cdecl", "pcap_setmintocopy", "ptr", $handle[0], "int", 1)
        $Pcap_statV=0
        $Pcap_statN=0
        $Pcap_starttime=TimerInit()
        return $handle[0]
EndFunc        


Func _PcapStopCapture($pcap)        ; stop capture started with _PcapStartCapture
        If NOT IsPtr($pcap) Then return
        DllCall($Pcap_dll, "none:cdecl", "pcap_close", "ptr", $pcap)           
EndFunc


Func _PcapGetPacket($pcap) ; return 0: timeout, -1:error, -2:EOF in file or if successfull array[0]=time [1]=captured len [2]=packet len [3]=packet data
        If NOT IsPtr($pcap) Then return -1
        $Pcap_ptrhdr=DllStructCreate ("ptr")        
        $Pcap_ptrpkt=DllStructCreate ("ptr")
        Local $pk[4]                
        Local $res = DllCall($Pcap_dll, "int:cdecl", "pcap_next_ex","ptr",$pcap, "ptr",DllStructGetPtr($Pcap_ptrhdr),"ptr",DllStructGetPtr($Pcap_ptrpkt))
        If ($res[0]<>1) Then return $res[0]
        Local $pkthdr=DllStructCreate ( "int s;int us;int caplen;int len",DllStructGetData($Pcap_ptrhdr,1))
        Local $packet=DLLStructCreate("ubyte["&DllStructGetData($pkthdr,3)&"]",DllStructGetData($Pcap_ptrpkt,1))                 
        Local $time_t=Mod(DllStructGetData($pkthdr,1)+$Pcap_timebias,86400)        
        $pk[0]=StringFormat ("%02d:%02d:%02d.%06d",int($time_t/3600),int(Mod($time_t,3600)/60),Mod($time_t,60),DllStructGetData($pkthdr,2))        
        $pk[1]=DllStructGetData($pkthdr,3)
        $pk[2]=DllStructGetData($pkthdr,4)
        $pk[3]=DllStructGetData($packet,1)
        ; stats
        $Pcap_statV+=$pk[2]
        $Pcap_statN+=1
        return $pk
EndFunc


Func _PcapSendPacket($pcap,$data) ; data in Binary Format
        If NOT IsPtr($pcap) Then return -1
        Local $databuffer=DllStructCreate ("ubyte["&BinaryLen($data)&"]")
        DLLStructSetData($databuffer,1,$data)
        Local $r=DllCall($Pcap_dll, "int:cdecl", "pcap_sendpacket","ptr",$pcap, "ptr",DllStructGetPtr($databuffer),"int",BinaryLen($data))
        return $r[0]
EndFunc
        
        
Func _PcapDispatchToFunc($pcap,$func) ; call $func with an data array as parameters as many times as there are packets in buffer, then returns the number of packets read or -1 (error) or -2 (break received)
        If NOT IsPtr($pcap) Then return -1
        Local $CallBack = DLLCallbackRegister ("_PcapHandler", "none:cdecl", "str;ptr;ptr") 
        If $CallBack=0 Then return -1
        Local $r=DllCall($Pcap_dll, "int:cdecl", "pcap_dispatch", "ptr", $pcap, "int",-1, "ptr", DllCallbackGetPtr($CallBack), "str", $func)
        DllCallbackFree ( $CallBack )
        return $r[0]
EndFunc        

                
Func _PcapHandler($user,$hdr,$data)
        Local $pk[4]
        Local $pkthdr=DllStructCreate ( "int s;int us;int caplen;int len",$hdr)
        Local $packet=DLLStructCreate("ubyte["&DllStructGetData($pkthdr,3)&"]",$data)                 
        Local $time_t=Mod(DllStructGetData($pkthdr,1)+$Pcap_timebias,86400)        
        $pk[0]=StringFormat ("%02d:%02d:%02d.%06d",int($time_t/3600),int(Mod($time_t,3600)/60),Mod($time_t,60),DllStructGetData($pkthdr,2))        
        $pk[1]=DllStructGetData($pkthdr,3)
        $pk[2]=DllStructGetData($pkthdr,4)
        $pk[3]=DllStructGetData($packet,1)
        ; stats
        $Pcap_statV+=$pk[2]
        $Pcap_statN+=1
        call($user,$pk)
EndFunc


Func _PcapIsPacketReady($pcap)
        If NOT IsPtr($pcap) Then return -1
        Local $handle=DllCall($Pcap_dll, "ptr:cdecl", "pcap_getevent", "ptr", $pcap)
        Local $state = DllCall("kernel32.dll", "dword", "WaitForSingleObject", "ptr", $handle[0],"dword",0)
        return $state[0]=0
EndFunc


; *********************** Save to file functions **************************

Func _PcapSaveToFile($pcap,$filename)        ; Open a file to save packets in pcap format
        If NOT IsPtr($pcap) Then return -1
        Local $save=DllCall($Pcap_dll, "ptr:cdecl", "pcap_dump_open", "ptr", $pcap, "str", $filename)
        if $save[0]=0 then return -1
        return $save[0]
EndFunc


Func _PcapWriteLastPacket($handle) ; Write the last received packet to file opened by _PcapSaveToFile 
        if NOT IsPtr($handle) Then return -1
        DllCall($Pcap_dll, "none:cdecl", "pcap_dump", "ptr", $handle, "ptr", DllStructGetData($Pcap_ptrhdr,1), "ptr", DllStructGetData($Pcap_ptrpkt,1))
EndFunc


Func _PcapStopCaptureFile($handle) ; Close capture file opened by _PcapSaveToFile
        if NOT IsPtr($handle) Then return -1
        DllCall($Pcap_dll, "none:cdecl", "pcap_dump_close", "ptr", $handle)
EndFunc

; *********************** Utility functions **************************

Func _PcapSock2addr ($sockaddr_ptr)          ; internat function to convert a sockaddr structure into an string containing an IP address
        If ($sockaddr_ptr=0) Then return ""
        Local $sockaddr = DllStructCreate("ushort family;char data[14]",$sockaddr_ptr)
        Local $family=DllStructGetData($sockaddr,1)
        If ($family = 2) Then ; AF_INET = IPv4
                Local $sockaddr_in = DllStructCreate("short family;ushort port;ubyte addr[4];char zero[8]",$sockaddr_ptr)
                return DllStructGetData($sockaddr_in,3,1)&"."&DllStructGetData($sockaddr_in,3,2)&"."&DllStructGetData($sockaddr_in,3,3)&"."&DllStructGetData($sockaddr_in,3,4)
        EndIf
        If ($family = 23) Then ; AF_INET6 = IPv6
                Local $sockaddr_in6 = DllStructCreate("ushort family;ushort port;uint flow;ubyte addr[16];uint scope",$sockaddr_ptr)
                Local $bin=DllStructGetData($sockaddr_in6,4)
                Local $i,$ipv6
                For $i=0 to 7
                        $ipv6&=StringMid($bin,3+$i*4,4)&":"
                Next
                return StringTrimRight($ipv6,1)
        EndIf        
        return ""
EndFunc

; Extract a $bytes bytes value from a $data binary string, starting from offset $offset (1 for first byte)
Func _PcapBinaryGetVal($data,$offset,$bytes) 
        Local $val32=Dec(StringMid($data, 3+($offset-1)*2 ,$bytes*2))
        If $val32<0 Then return 2^32+$val32
        return $val32
EndFunc        


; Sets (replaces) a $bytes (up to 8) bytes value $value inside a $data binary string, starting at offset $offset (1 for first byte)
; User should make sure before calling this function that $data contains at least $offset+$bytes binary bytes !
Func _PcapBinarySetVal(Byref $data,$offset,$value,$bytes) 
        $data=StringReplace($data,3+($offset-1)*2,hex($value,$bytes*2))
EndFunc        


; $data is the packet data as a binary string
; $ipoffset is offset to the ip header; 14 bytes by default for an ethernet frame
; one should check before calling this function that data actualy contains an IP packet !
Func _PcapIpCheckSum ($data,$ipoffset=14)
        Local $iplen=BitAnd(_PcapBinaryGetVal($data,$ipoffset+1,1),0xF)*4
        Local $sum=0,$i
        For $i=1 To $iplen step 2
                $sum+=BitAnd(0xFFFF,_PcapBinaryGetVal($data,$ipoffset+$i,2))
        Next
        $sum-=_PcapBinaryGetVal($data,$ipoffset+11,2)
        While $sum>0xFFFF
                $sum = BitAnd($sum,0xFFFF)+BitShift($sum,16)
        Wend
        return BitXOR($sum,0xFFFF)
EndFunc


; $data is the packet data as a binary string
; $ipoffset is offset to the ip header; 14 bytes by default for an ethernet frame
; one should check before calling this function that data actualy contains an ICMP packet !
Func _PcapIcmpCheckSum ($data,$ipoffset=14)
        Local $iplen=BitAnd(_PcapBinaryGetVal($data,$ipoffset+1,1),0xF)*4
        Local $len=_PcapBinaryGetVal($data,$ipoffset+3,2)-$iplen  ; ip len - ip header len
        Local $sum=0,$i
        For $i=1 To BitAnd($len,0xFFFE) step 2
                $sum+=BitAnd(0xFFFF,_PcapBinaryGetVal($data,$ipoffset+$iplen+$i,2))
        Next
        If BitAnd($len,1) Then 
                $sum+=BitAnd(0xFF00,BitShift(_PcapBinaryGetVal($data,$ipoffset+$iplen+$len,1),-8))
        EndIf        
        $sum-=_PcapBinaryGetVal($data,$ipoffset+$iplen+3,2)
        While $sum>0xFFFF
                $sum = BitAnd($sum,0xFFFF)+BitShift($sum,16)
        Wend
        return BitXOR($sum,0xFFFF)
EndFunc


; $data is the packet data as a binary string
; $ipoffset is offset to the ip header; 14 bytes by default for an ethernet frame
; one should check before calling this function that data actualy contains a TCP packet !
Func _PcapTcpCheckSum ($data,$ipoffset=14)
        Local $iplen=BitAnd(_PcapBinaryGetVal($data,$ipoffset+1,1),0xF)*4
        Local $len=_PcapBinaryGetVal($data,$ipoffset+3,2)-$iplen  ; ip len - ip header len
        Local $sum=0,$i
        For $i=1 To BitAnd($len,0xFFFE) step 2
                $sum+=BitAnd(0xFFFF,_PcapBinaryGetVal($data,$ipoffset+$iplen+$i,2))
        Next
        If BitAnd($len,1) Then 
                $sum+=BitAnd(0xFF00,BitShift(_PcapBinaryGetVal($data,$ipoffset+$iplen+$len,1),-8))
        EndIf        
        $sum+=_PcapBinaryGetVal($data,$ipoffset+13,2)+_PcapBinaryGetVal($data,$ipoffset+15,2)+_PcapBinaryGetVal($data,$ipoffset+17,2)+_PcapBinaryGetVal($data,$ipoffset+19,2)+$len+6-_PcapBinaryGetVal($data,$ipoffset+$iplen+17,2)        ; tcp pseudo header
        While $sum>0xFFFF
                $sum = BitAnd($sum,0xFFFF)+BitShift($sum,16)
        Wend
        return BitXOR($sum,0xFFFF)
EndFunc


; $data is the packet data as a binary string
; $ipoffset is offset to the ip header; 14 bytes by default for an ethernet frame
; one should check before calling this function that data actualy contains a UDP packet !
; Also, if the packet UDP value is set to 0x0000, no need to call this function, it means the CRC is not used in this packet.
Func _PcapUdpCheckSum ($data,$ipoffset=14)
        Local $iplen=BitAnd(_PcapBinaryGetVal($data,$ipoffset+1,1),0xF)*4
        Local $len=_PcapBinaryGetVal($data,$ipoffset+3,2)-$iplen  ; ip len - ip header len
        Local $sum=0,$i
        For $i=1 To BitAnd($len,0xFFFE) step 2
                $sum+=BitAnd(0xFFFF,_PcapBinaryGetVal($data,$ipoffset+$iplen+$i,2))
        Next
        If BitAnd($len,1) Then 
                $sum+=BitAnd(0xFF00,BitShift(_PcapBinaryGetVal($data,$ipoffset+$iplen+$len,1),-8))
        EndIf        
        $sum+=_PcapBinaryGetVal($data,$ipoffset+13,2)+_PcapBinaryGetVal($data,$ipoffset+15,2)+_PcapBinaryGetVal($data,$ipoffset+17,2)+_PcapBinaryGetVal($data,$ipoffset+19,2)+$len+17-_PcapBinaryGetVal($data,$ipoffset+$iplen+7,2)        ; udp pseudo header
        While $sum>0xFFFF
                $sum = BitAnd($sum,0xFFFF)+BitShift($sum,16)
        Wend
        Local $crc=BitXOR($sum,0xFFFF)
        If $crc=0x0000 Then return 0xFFFF
        return $crc
EndFunc


Func _PcapCleanDeviceName($fullname) ; returns a cleaner device name without 'Network adapter ' etc if any
        Local $name=StringRegExp($fullname,"^Network adapter '(.*)' on",1)
        If @error=0 Then return StringStripWS($name[0],7)
        return StringStripWS($fullname,7)
EndFunc

yorker0503 · 发表于 2012-10-15 08:54:25

自己搞定了把176行改成

If StringInStr($f,"Psh") Then ;此标志为发送数据
                                        return "TCP("&$f&") "&$src&":"&$srcport&" -> "&$dst&":"&$dstport&" Content: " & BinaryToString(BinaryMid ($data,67))
                                Else
                                        return "TCP("&$f&") "&$src&":"&$srcport&" -> "&$dst&":"&$dstport
                                EndIf

yorker0503 · 发表于 2012-10-15 08:55:33

无法改帖子为已解决

hz453673181 · 发表于 2012-11-1 14:01:04

好东西，但是看不懂

sdc7 · 发表于 2013-6-22 13:47:21

不错··看看能修改数据包不··

gb23 · 发表于 2014-8-3 23:59:23

如此好东西居然没人顶！必须顶！

gb23 · 发表于 2014-8-4 00:18:19

请问汉字乱码怎么转换啊？弱弱的问数据包中的汉字怎么办啊？

gb23 · 发表于 2014-8-11 23:33:57

pcap 不懂啊~~~

wozijisun · 发表于 2014-10-24 10:30:50

高手你好，我是新手，想问个问题。
1、咱们这个程序是不是能将PCAP包中的所有信息都解析出来？
2、怎么判断某个字段在哪里？比如：sequence。
3、能不能将PCAP中的所有信息按照Wireshark工具打开的顺序输出出来？
其实，这三个问题，好像是一个问题。但是，非常期待你的解答。

wozijisun · 发表于 2014-10-24 14:44:22

回复 9# wozijisun

问题已经解决了。

gb23 · 发表于 2015-1-16 22:32:17

今天再看看~~~此贴值得深研，谢谢楼主的无私！真心的！

qqgghh1 · 发表于 2015-2-12 11:16:08

快过年了，顶一个。楼主真心无私奉献，抓网络数据包分析真的很有用。可惜小弟基本不懂

x11lang · 发表于 2015-2-16 10:43:21

mark，后面慢慢看

yuly · 发表于 2015-7-1 17:11:52

无私的人,谢谢,,用的上

		自动登录	找回密码
密码			加入

[求购] 400RMB 求用winpcap 抓取网络数据包并提取出http数据包内容

评分

[求购] 400RMB 求 用winpcap 抓取网络数据包并提取出http数据包内容

评分

[求购] 400RMB 求用winpcap 抓取网络数据包并提取出http数据包内容