#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/limits.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <netinet/tcp.h>
#include <netinet/libalias/alias.h>
#include <netinet/libalias/alias_local.h>
#include <netinet/libalias/alias_mod.h>

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Data Structures
struct	grehdr

struct	pptpMsgHead

struct	pptpCodes

struct	pptpCallIds

Macros
#define	PPTP_CONTROL_PORT_NUMBER 1723

#define	PPTP_GRE_PROTO 0x880b

#define	PPTP_INIT_VALUE ((0x2001 << 16) \| PPTP_GRE_PROTO)

#define	PPTP_INIT_MASK 0xef7fffff

#define	PPTP_MAGIC 0x1a2b3c4d

#define	PPTP_CTRL_MSG_TYPE 1

Typedefs
typedef struct grehdr	GreHdr

typedef struct pptpMsgHead *	PptpMsgHead

typedef struct pptpCodes *	PptpCode

typedef struct pptpCallIds *	PptpCallId

Enumerations
enum	{ PPTP_StartCtrlConnRequest = 1 , PPTP_StartCtrlConnReply = 2 , PPTP_StopCtrlConnRequest = 3 , PPTP_StopCtrlConnReply = 4 , PPTP_EchoRequest = 5 , PPTP_EchoReply = 6 , PPTP_OutCallRequest = 7 , PPTP_OutCallReply = 8 , PPTP_InCallRequest = 9 , PPTP_InCallReply = 10 , PPTP_InCallConn = 11 , PPTP_CallClearRequest = 12 , PPTP_CallDiscNotify = 13 , PPTP_WanErrorNotify = 14 , PPTP_SetLinkInfo = 15 }

Functions
	__FBSDID ("$FreeBSD$")

static void	AliasHandlePptpOut (struct libalias , struct ip , struct alias_link *)

static void	AliasHandlePptpIn (struct libalias , struct ip , struct alias_link *)

static int	AliasHandlePptpGreOut (struct libalias , struct ip )

static int	AliasHandlePptpGreIn (struct libalias , struct ip )

static int	fingerprint (struct libalias la, struct alias_data ah)

static int	fingerprintgre (struct libalias la, struct alias_data ah)

static int	protohandlerin (struct libalias la, struct ip pip, struct alias_data *ah)

static int	protohandlerout (struct libalias la, struct ip pip, struct alias_data *ah)

static int	protohandlergrein (struct libalias la, struct ip pip, struct alias_data *ah)

static int	protohandlergreout (struct libalias la, struct ip pip, struct alias_data *ah)

static int	mod_handler (module_t mod, int type, void *data)

	DECLARE_MODULE (alias_pptp, alias_mod, SI_SUB_DRIVERS, SI_ORDER_SECOND)

	MODULE_VERSION (alias_pptp, 1)

	MODULE_DEPEND (alias_pptp, libalias, 1, 1, 1)

static PptpCallId	AliasVerifyPptp (struct ip , u_int16_t )

Variables
struct proto_handler	handlers []

static moduledata_t	alias_mod

Macro Definition Documentation

◆ PPTP_CONTROL_PORT_NUMBER

#define PPTP_CONTROL_PORT_NUMBER 1723

Definition at line 67 of file alias_pptp.c.

◆ PPTP_CTRL_MSG_TYPE

#define PPTP_CTRL_MSG_TYPE 1

Definition at line 247 of file alias_pptp.c.

◆ PPTP_GRE_PROTO

#define PPTP_GRE_PROTO 0x880b

Definition at line 240 of file alias_pptp.c.

◆ PPTP_INIT_MASK

#define PPTP_INIT_MASK 0xef7fffff

Definition at line 244 of file alias_pptp.c.

◆ PPTP_INIT_VALUE

#define PPTP_INIT_VALUE ((0x2001 << 16) | PPTP_GRE_PROTO)

Definition at line 243 of file alias_pptp.c.

◆ PPTP_MAGIC

#define PPTP_MAGIC 0x1a2b3c4d

Definition at line 246 of file alias_pptp.c.

Typedef Documentation

◆ GreHdr

typedef struct grehdr GreHdr

Definition at line 237 of file alias_pptp.c.

◆ PptpCallId

typedef struct pptpCallIds* PptpCallId

Definition at line 287 of file alias_pptp.c.

◆ PptpCode

typedef struct pptpCodes* PptpCode

Definition at line 281 of file alias_pptp.c.

◆ PptpMsgHead

typedef struct pptpMsgHead* PptpMsgHead

Definition at line 275 of file alias_pptp.c.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
PPTP_StartCtrlConnRequest
PPTP_StartCtrlConnReply
PPTP_StopCtrlConnRequest
PPTP_StopCtrlConnReply
PPTP_EchoRequest
PPTP_EchoReply
PPTP_OutCallRequest
PPTP_OutCallReply
PPTP_InCallRequest
PPTP_InCallReply
PPTP_InCallConn
PPTP_CallClearRequest
PPTP_CallDiscNotify
PPTP_WanErrorNotify
PPTP_SetLinkInfo

Definition at line 249 of file alias_pptp.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ AliasHandlePptpGreIn()

static int AliasHandlePptpGreIn	(	struct libalias *	la,
		struct ip *	pip
	)

static

Definition at line 492 of file alias_pptp.c.

References DifferentialChecksum(), FindPptpInByPeerCallId(), GetOriginalAddress(), GetOriginalPort(), grehdr::gh_call_id, ip::ip_dst, ip::ip_sum, alias_link::la, PPTP_INIT_MASK, and PPTP_INIT_VALUE.

Referenced by protohandlergrein().

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◆ AliasHandlePptpGreOut()

static int AliasHandlePptpGreOut	(	struct libalias *	la,
		struct ip *	pip
	)

static

Definition at line 468 of file alias_pptp.c.

References DifferentialChecksum(), FindPptpOutByPeerCallId(), GetAliasAddress(), grehdr::gh_call_id, ip::ip_dst, ip::ip_sum, alias_link::la, PPTP_INIT_MASK, and PPTP_INIT_VALUE.

Referenced by protohandlergreout().

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◆ AliasHandlePptpIn()

static void AliasHandlePptpIn	(	struct libalias *	la,
		struct ip *	pip,
		struct alias_link *	lnk
	)

static

Definition at line 364 of file alias_pptp.c.

References ADJUST_CHECKSUM, AliasVerifyPptp(), pptpCallIds::cid1, pptpCallIds::cid2, FindPptpInByCallId(), FindPptpInByPeerCallId(), GetAliasAddress(), GetDestAddress(), GetOriginalPort(), PPTP_CallDiscNotify, PPTP_InCallConn, PPTP_InCallReply, PPTP_OutCallReply, PPTP_SetLinkInfo, PPTP_WanErrorNotify, pptpCodes::resCode, SetDestCallId(), and SetExpire().

Referenced by protohandlerin().

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◆ AliasHandlePptpOut()

static void AliasHandlePptpOut	(	struct libalias *	la,
		struct ip *	pip,
		struct alias_link *	lnk
	)

static

Definition at line 292 of file alias_pptp.c.

References AddPptp(), ADJUST_CHECKSUM, AliasVerifyPptp(), pptpCallIds::cid1, pptpCallIds::cid2, FindPptpOutByCallId(), GetAliasAddress(), GetAliasPort(), GetDestAddress(), GetOriginalAddress(), PPTP_CallClearRequest, PPTP_CallDiscNotify, PPTP_InCallReply, PPTP_InCallRequest, PPTP_OutCallReply, PPTP_OutCallRequest, pptpCodes::resCode, SetDestCallId(), and SetExpire().

Referenced by protohandlerout().

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◆ AliasVerifyPptp()

static PptpCallId AliasVerifyPptp	(	struct ip *	pip,
		u_int16_t *	ptype
	)

static

Definition at line 431 of file alias_pptp.c.

References ip::ip_hl, ip::ip_len, pptpMsgHead::magic, pptpMsgHead::msgType, PPTP_CTRL_MSG_TYPE, PPTP_InCallReply, PPTP_MAGIC, PPTP_OutCallReply, and pptpMsgHead::type.

Referenced by AliasHandlePptpIn(), and AliasHandlePptpOut().

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◆ DECLARE_MODULE()

DECLARE_MODULE	(	alias_pptp	,
		alias_mod	,
		SI_SUB_DRIVERS	,
		SI_ORDER_SECOND
	)

◆ fingerprint()

static int fingerprint	(	struct libalias *	la,
		struct alias_data *	ah
	)

static

Definition at line 82 of file alias_pptp.c.

References alias_data::dport, alias_data::lnk, PPTP_CONTROL_PORT_NUMBER, and alias_data::sport.

◆ fingerprintgre()

static int fingerprintgre	(	struct libalias *	la,
		struct alias_data *	ah
	)

static

Definition at line 93 of file alias_pptp.c.

◆ mod_handler()

static int mod_handler	(	module_t	mod,
		int	type,
		void *	data
	)

static

Definition at line 167 of file alias_pptp.c.

References handlers, LibAliasAttachHandlers(), and LibAliasDetachHandlers().

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◆ MODULE_DEPEND()

MODULE_DEPEND	(	alias_pptp	,
		libalias	,
		1	,
		1	,
		1
	)

◆ MODULE_VERSION()

MODULE_VERSION	(	alias_pptp	,
		1
	)

◆ protohandlergrein()

static int protohandlergrein	(	struct libalias *	la,
		struct ip *	pip,
		struct alias_data *	ah
	)

static

Definition at line 113 of file alias_pptp.c.

References AliasHandlePptpGreIn(), libalias::packetAliasMode, and PKT_ALIAS_PROXY_ONLY.

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◆ protohandlergreout()

static int protohandlergreout	(	struct libalias *	la,
		struct ip *	pip,
		struct alias_data *	ah
	)

static

Definition at line 122 of file alias_pptp.c.

References AliasHandlePptpGreOut().

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◆ protohandlerin()

static int protohandlerin	(	struct libalias *	la,
		struct ip *	pip,
		struct alias_data *	ah
	)

static

Definition at line 99 of file alias_pptp.c.

References AliasHandlePptpIn(), and alias_data::lnk.

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◆ protohandlerout()

static int protohandlerout	(	struct libalias *	la,
		struct ip *	pip,
		struct alias_data *	ah
	)

static

Definition at line 106 of file alias_pptp.c.

References AliasHandlePptpOut(), and alias_data::lnk.

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Variable Documentation

◆ alias_mod

moduledata_t alias_mod

static

Initial value:

= {
       "alias_pptp", mod_handler, NULL
}

Definition at line 189 of file alias_pptp.c.

◆ handlers

struct proto_handler handlers[]

Definition at line 130 of file alias_pptp.c.

Referenced by mod_handler().

Data Structures

Macros

Typedefs

Enumerations

Functions

Variables

Macro Definition Documentation

◆ PPTP_CONTROL_PORT_NUMBER

◆ PPTP_CTRL_MSG_TYPE

◆ PPTP_GRE_PROTO

◆ PPTP_INIT_MASK

◆ PPTP_INIT_VALUE

◆ PPTP_MAGIC

Typedef Documentation

◆ GreHdr

◆ PptpCallId

◆ PptpCode

◆ PptpMsgHead

Enumeration Type Documentation

◆ anonymous enum

Function Documentation

◆ __FBSDID()

◆ AliasHandlePptpGreIn()

◆ AliasHandlePptpGreOut()

◆ AliasHandlePptpIn()

◆ AliasHandlePptpOut()

◆ AliasVerifyPptp()

◆ DECLARE_MODULE()

◆ fingerprint()

◆ fingerprintgre()

◆ mod_handler()

◆ MODULE_DEPEND()

◆ MODULE_VERSION()

◆ protohandlergrein()

◆ protohandlergreout()

◆ protohandlerin()

◆ protohandlerout()

Variable Documentation

◆ alias_mod

◆ handlers