/*
?*??TAP-Win32?--?A?kernel?driver?to?provide?virtual?tap?device?functionality
?*???????????????on?Windows.??Originally?derived?from?the?CIPE-Win32
?*???????????????project?by?Damion?K.?Wilson?with?extensive?modifications?by
?*???????????????James?Yonan.
?*
?*??All?source?code?which?derives?from?the?CIPE-Win32?project?is
?*??Copyright?（C）?Damion?K.?Wilson?2003?and?is?released?under?the
?*??GPL?version?2?（see?below）.
?*
?*??All?other?source?code?is?Copyright?（C）?2002-2005?OpenVPN?Solutions?LLC
?*??and?is?released?under?the?GPL?version?2?（see?below）.
?*
?*??This?program?is?free?software;?you?can?redistribute?it?and/or?modify
?*??it?under?the?terms?of?the?GNU?General?Public?License?version?2
?*??as?published?by?the?Free?Software?Foundation.
?*
?*??This?program?is?distributed?in?the?hope?that?it?will?be?useful
?*??but?WITHOUT?ANY?WARRANTY;?without?even?the?implied?warranty?of
?*??MERCHANTABILITY?or?FITNESS?FOR?A?PARTICULAR?PURPOSE.??See?the
?*??GNU?General?Public?License?for?more?details.
?*
?*??You?should?have?received?a?copy?of?the?GNU?General?Public?License
?*??along?with?this?program?（see?the?file?COPYING?included?with?this
?*??distribution）;?if?not?write?to?the?Free?Software?Foundation?Inc.
?*??59?Temple?Place?Suite?330?Boston?MA??02111-1307??USA
?*/

//=========================
//?Code?to?set?DHCP?options
//=========================

VOID
SetDHCPOpt?（DHCPMsg?*m?void?*data?unsigned?int?len）
{
??if?（!m->overflow）
????{
??????if?（m->optlen?+?len?<=?DHCP_OPTIONS_BUFFER_SIZE）
	{
	??if?（len）
	????{
	??????NdisMoveMemory?（m->msg.options?+?m->optlen?data?len）;
	??????m->optlen?+=?len;
	????}
	}
??????else
	{
	??m->overflow?=?TRUE;
	}
????}
}

VOID
SetDHCPOpt0?（DHCPMsg?*msg?int?type）
{
??DHCPOPT0?opt;
??opt.type?=?（UCHAR）?type;
??SetDHCPOpt?（msg?&opt?sizeof?（opt））;
}

VOID
SetDHCPOpt8?（DHCPMsg?*msg?int?type?ULONG?data）
{
??DHCPOPT8?opt;
??opt.type?=?（UCHAR）?type;
??opt.len?=?sizeof?（opt.data）;
??opt.data?=?（UCHAR）?data;
??SetDHCPOpt?（msg?&opt?sizeof?（opt））;
}

VOID
SetDHCPOpt32?（DHCPMsg?*msg?int?type?ULONG?data）
{
??DHCPOPT32?opt;
??opt.type?=?（UCHAR）?type;
??opt.len?=?sizeof?（opt.data）;
??opt.data?=?data;
??SetDHCPOpt?（msg?&opt?sizeof?（opt））;
}

//==============
//?Checksum?code
//==============

USHORT
ip_checksum?（const?UCHAR?*buf?const?int?len_ip_header）
{
??USHORT?word16;
??ULONG?sum?=?0;
??int?i;
????
??//?make?16?bit?words?out?of?every?two?adjacent?8?bit?words?in?the?packet
??//?and?add?them?up
??for?（i?=?0;?i?????word16?=?（（buf[i]?<????sum?+=?（ULONG）?word16;
??}

??//?take?only?16?bits?out?of?the?32?bit?sum?and?add?up?the?carries
??while?（sum?>>?16）
????sum?=?（sum?&?0xFFFF）?+?（sum?>>?16）;

??//?one‘s?complement?the?result
??return?（（USHORT）?~sum）;
}

USHORT
udp_checksum?（const?UCHAR?*buf
	??????const?int?len_udp
	??????const?UCHAR?*src_addr
	??????const?UCHAR?*dest_addr）
{
??USHORT?word16;
??ULONG?sum?=?0;
??int?i;
	
??//?make?16?bit?words?out?of?ev

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????6857??2006-10-01?19:59??tap-win32\amd64\OemWin2k.inf

?????文件????????474??2006-10-01?19:59??tap-win32\amd64\tap.cat

?????文件???????6022??2010-11-12?11:56??tap-win32\buildchk_wxp_x86.log

?????文件????????642??2010-11-12?11:56??tap-win32\buildchk_wxp_x86.wrn

?????文件???????3341??2006-10-01?19:59??tap-win32\common.h

?????文件???????2371??2006-10-01?19:59??tap-win32\constants.h

?????文件??????14990??2006-10-01?19:59??tap-win32\dhcp.c

?????文件???????5033??2006-10-01?19:59??tap-win32\dhcp.h

?????文件???????1595??2006-10-01?19:59??tap-win32\endian.h

?????文件???????8741??2006-10-01?19:59??tap-win32\error.c

?????文件???????2556??2006-10-01?19:59??tap-win32\error.h

?????文件???????2306??2006-10-01?19:59??tap-win32\hexdump.c

?????文件???????2309??2006-10-01?19:59??tap-win32\hexdump.h

?????文件???????6840??2006-10-01?19:59??tap-win32\i386\OemWin2k.inf

?????文件????????474??2006-10-01?19:59??tap-win32\i386\tap.cat

?????文件???????5662??2006-10-01?19:59??tap-win32\instance.c

?????文件???????3517??2006-10-01?19:59??tap-win32\lock.h

?????文件???????4027??2006-10-01?19:59??tap-win32\macinfo.c

?????文件???????1938??2006-10-01?19:59??tap-win32\macinfo.h

?????文件????????241??2006-10-01?19:59??tap-win32\MAKEFILE

?????文件???????3903??2006-10-01?19:59??tap-win32\mem.c

?????文件???????3366??2010-11-12?11:56??tap-win32\objchk_wxp_x86\i386\RCa02812

?????文件????????280??2010-11-12?11:56??tap-win32\objchk_wxp_x86\i386\_objects.mac

?????文件???????4518??2006-10-01?19:59??tap-win32\proto.h

?????文件???????4569??2006-10-01?19:59??tap-win32\prototypes.h

?????文件???????1550??2006-10-01?19:59??tap-win32\resource.rc

?????文件???????2230??2010-11-12?12:53??tap-win32\SOURCES

?????文件??????82237??2006-10-01?19:59??tap-win32\tapdrvr.c

?????文件???????4541??2006-10-01?19:59??tap-win32\types.h

?????目錄??????????0??2011-01-21?09:26??tap-win32\objchk_wxp_x86\i386

............此處省略7個文件信息