/******************************************************************************
?*
?*?Copyright（c）?2007?-?2011?Realtek?Corporation.?All?rights?reserved.
?*????????????????????????????????????????
?*?This?program?is?free?software;?you?can?redistribute?it?and/or?modify?it
?*?under?the?terms?of?version?2?of?the?GNU?General?Public?License?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;?if?not?write?to?the?Free?Software?Foundation?Inc.
?*?51?Franklin?Street?Fifth?Floor?Boston?MA?02110?USA
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?*
?******************************************************************************/
#define?_RTW_BR_EXT_C_

#ifdef?__KERNEL__
#include?
#include?
#include?
#include?
#include?
#include?
#endif

#if?1	//?rtw_wifi_driver
#include?
#include?
#include?“rtw_br_ext.h“
#else	//?rtw_wifi_driver
#include?“./8192cd_cfg.h“

#ifndef?__KERNEL__
#include?“./sys-support.h“
#endif

#include?“./8192cd.h“
#include?“./8192cd_headers.h“
#include?“./8192cd_br_ext.h“
#include?“./8192cd_debug.h“
#endif	//?rtw_wifi_driver

#ifdef?CL_IPV6_PASS
#ifdef?__KERNEL__
#include?
#include?
#include?
#include?
#endif
#endif

#ifdef?CONFIG_BR_EXT

//#define?BR_EXT_DEBUG

#define?NAT25_IPV4		01
#define?NAT25_IPV6		02
#define?NAT25_IPX		03
#define?NAT25_APPLE		04
#define?NAT25_PPPOE		05

#define?RTL_RELAY_TAG_LEN?（ETH_ALEN）
#define?TAG_HDR_LEN		4

#define?MAGIC_CODE		0x8186
#define?MAGIC_CODE_LEN	2
#define?WAIT_TIME_PPPOE	5	//?waiting?time?for?pppoe?server?in?sec

/*-----------------------------------------------------------------
??How?database?records?network?address:
???????????0????1????2????3????4????5????6????7????8????9???10
????????|----|----|----|----|----|----|----|----|----|----|----|
??IPv4??|type|?????????????????????????????|??????IP?addr??????|
??IPX???|type|??????Net?addr?????|??????????Node?addr??????????|
??IPX???|type|??????Net?addr?????|Sckt?addr|
??Apple?|type|?Network?|node|
??PPPoE?|type|???SID???|???????????AC?MAC????????????|
-----------------------------------------------------------------*/


//Find?a?tag?in?pppoe?frame?and?return?the?pointer
static?__inline__?unsigned?char?*__nat25_find_pppoe_tag（struct?pppoe_hdr?*ph?unsigned?short?type）
{
	unsigned?char?*cur_ptr?*start_ptr;
	unsigned?short?tagLen?tagType;

	start_ptr?=?cur_ptr?=?（unsigned?char?*）ph->tag;
	while（（cur_ptr?-?start_ptr）?length））?{
		//?prevent?un-alignment?access
		tagType?=?（unsigned?short）（（cur_ptr[0]?<		tagLen??=?（unsigned?short）（（cur_ptr[2]?<