Release 4.12 include/linux/netfilter/nf_conntrack_pptp.h

/* PPTP constants and structs */
#ifndef _NF_CONNTRACK_PPTP_H

#define _NF_CONNTRACK_PPTP_H

#include <linux/netfilter/nf_conntrack_common.h>

extern const char *const pptp_msg_name[];

/* state of the control session */

enum pptp_ctrlsess_state {
	
PPTP_SESSION_NONE,			/* no session present */
	
PPTP_SESSION_ERROR,			/* some session error */
	
PPTP_SESSION_STOPREQ,			/* stop_sess request seen */
	
PPTP_SESSION_REQUESTED,			/* start_sess request seen */
	
PPTP_SESSION_CONFIRMED,			/* session established */
};

/* state of the call inside the control session */

enum pptp_ctrlcall_state {
	
PPTP_CALL_NONE,
	
PPTP_CALL_ERROR,
	
PPTP_CALL_OUT_REQ,
	
PPTP_CALL_OUT_CONF,
	
PPTP_CALL_IN_REQ,
	
PPTP_CALL_IN_REP,
	
PPTP_CALL_IN_CONF,
	
PPTP_CALL_CLEAR_REQ,
};

/* conntrack private data */

struct nf_ct_pptp_master {
	
enum pptp_ctrlsess_state sstate;	/* session state */
	
enum pptp_ctrlcall_state cstate;	/* call state */
	
__be16 pac_call_id;			/* call id of PAC */
	
__be16 pns_call_id;			/* call id of PNS */

	/* in pre-2.6.11 this used to be per-expect. Now it is per-conntrack
         * and therefore imposes a fixed limit on the number of maps */
	
struct nf_ct_gre_keymap *keymap[IP_CT_DIR_MAX];
};


struct nf_nat_pptp {
	
__be16 pns_call_id;			/* NAT'ed PNS call id */
	
__be16 pac_call_id;			/* NAT'ed PAC call id */
};

#ifdef __KERNEL__


#define PPTP_CONTROL_PORT	1723


#define PPTP_PACKET_CONTROL	1

#define PPTP_PACKET_MGMT	2


#define PPTP_MAGIC_COOKIE	0x1a2b3c4d


struct pptp_pkt_hdr {
	
__u16	packetLength;
	
__be16	packetType;
	
__be32	magicCookie;
};

/* PptpControlMessageType values */

#define PPTP_START_SESSION_REQUEST	1

#define PPTP_START_SESSION_REPLY	2

#define PPTP_STOP_SESSION_REQUEST	3

#define PPTP_STOP_SESSION_REPLY		4

#define PPTP_ECHO_REQUEST		5

#define PPTP_ECHO_REPLY			6

#define PPTP_OUT_CALL_REQUEST		7

#define PPTP_OUT_CALL_REPLY		8

#define PPTP_IN_CALL_REQUEST		9

#define PPTP_IN_CALL_REPLY		10

#define PPTP_IN_CALL_CONNECT		11

#define PPTP_CALL_CLEAR_REQUEST		12

#define PPTP_CALL_DISCONNECT_NOTIFY	13

#define PPTP_WAN_ERROR_NOTIFY		14

#define PPTP_SET_LINK_INFO		15


#define PPTP_MSG_MAX			15

/* PptpGeneralError values */

#define PPTP_ERROR_CODE_NONE		0

#define PPTP_NOT_CONNECTED		1

#define PPTP_BAD_FORMAT			2

#define PPTP_BAD_VALUE			3

#define PPTP_NO_RESOURCE		4

#define PPTP_BAD_CALLID			5

#define PPTP_REMOVE_DEVICE_ERROR	6


struct PptpControlHeader {
	
__be16	messageType;
	
__u16	reserved;
};

/* FramingCapability Bitmap Values */

#define PPTP_FRAME_CAP_ASYNC		0x1

#define PPTP_FRAME_CAP_SYNC		0x2

/* BearerCapability Bitmap Values */

#define PPTP_BEARER_CAP_ANALOG		0x1

#define PPTP_BEARER_CAP_DIGITAL		0x2


struct PptpStartSessionRequest {
	
__be16	protocolVersion;
	
__u16	reserved1;
	
__be32	framingCapability;
	
__be32	bearerCapability;
	
__be16	maxChannels;
	
__be16	firmwareRevision;
	
__u8	hostName[64];
	
__u8	vendorString[64];
};

/* PptpStartSessionResultCode Values */

#define PPTP_START_OK			1

#define PPTP_START_GENERAL_ERROR	2

#define PPTP_START_ALREADY_CONNECTED	3

#define PPTP_START_NOT_AUTHORIZED	4

#define PPTP_START_UNKNOWN_PROTOCOL	5


struct PptpStartSessionReply {
	
__be16	protocolVersion;
	
__u8	resultCode;
	
__u8	generalErrorCode;
	
__be32	framingCapability;
	
__be32	bearerCapability;
	
__be16	maxChannels;
	
__be16	firmwareRevision;
	
__u8	hostName[64];
	
__u8	vendorString[64];
};

/* PptpStopReasons */

#define PPTP_STOP_NONE			1

#define PPTP_STOP_PROTOCOL		2

#define PPTP_STOP_LOCAL_SHUTDOWN	3


struct PptpStopSessionRequest {
	
__u8	reason;
	
__u8	reserved1;
	
__u16	reserved2;
};

/* PptpStopSessionResultCode */

#define PPTP_STOP_OK			1

#define PPTP_STOP_GENERAL_ERROR		2


struct PptpStopSessionReply {
	
__u8	resultCode;
	
__u8	generalErrorCode;
	
__u16	reserved1;
};


struct PptpEchoRequest {
	
__be32 identNumber;
};

/* PptpEchoReplyResultCode */

#define PPTP_ECHO_OK			1

#define PPTP_ECHO_GENERAL_ERROR		2


struct PptpEchoReply {
	
__be32	identNumber;
	
__u8	resultCode;
	
__u8	generalErrorCode;
	
__u16	reserved;
};

/* PptpFramingType */

#define PPTP_ASYNC_FRAMING		1

#define PPTP_SYNC_FRAMING		2

#define PPTP_DONT_CARE_FRAMING		3

/* PptpCallBearerType */

#define PPTP_ANALOG_TYPE		1

#define PPTP_DIGITAL_TYPE		2

#define PPTP_DONT_CARE_BEARER_TYPE	3


struct PptpOutCallRequest {
	
__be16	callID;
	
__be16	callSerialNumber;
	
__be32	minBPS;
	
__be32	maxBPS;
	
__be32	bearerType;
	
__be32	framingType;
	
__be16	packetWindow;
	
__be16	packetProcDelay;
	
__be16	phoneNumberLength;
	
__u16	reserved1;
	
__u8	phoneNumber[64];
	
__u8	subAddress[64];
};

/* PptpCallResultCode */

#define PPTP_OUTCALL_CONNECT		1

#define PPTP_OUTCALL_GENERAL_ERROR	2

#define PPTP_OUTCALL_NO_CARRIER		3

#define PPTP_OUTCALL_BUSY		4

#define PPTP_OUTCALL_NO_DIAL_TONE	5

#define PPTP_OUTCALL_TIMEOUT		6

#define PPTP_OUTCALL_DONT_ACCEPT	7


struct PptpOutCallReply {
	
__be16	callID;
	
__be16	peersCallID;
	
__u8	resultCode;
	
__u8	generalErrorCode;
	
__be16	causeCode;
	
__be32	connectSpeed;
	
__be16	packetWindow;
	
__be16	packetProcDelay;
	
__be32	physChannelID;
};


struct PptpInCallRequest {
	
__be16	callID;
	
__be16	callSerialNumber;
	
__be32	callBearerType;
	
__be32	physChannelID;
	
__be16	dialedNumberLength;
	
__be16	dialingNumberLength;
	
__u8	dialedNumber[64];
	
__u8	dialingNumber[64];
	
__u8	subAddress[64];
};

/* PptpInCallResultCode */

#define PPTP_INCALL_ACCEPT		1

#define PPTP_INCALL_GENERAL_ERROR	2

#define PPTP_INCALL_DONT_ACCEPT		3


struct PptpInCallReply {
	
__be16	callID;
	
__be16	peersCallID;
	
__u8	resultCode;
	
__u8	generalErrorCode;
	
__be16	packetWindow;
	
__be16	packetProcDelay;
	
__u16	reserved;
};


struct PptpInCallConnected {
	
__be16	peersCallID;
	
__u16	reserved;
	
__be32	connectSpeed;
	
__be16	packetWindow;
	
__be16	packetProcDelay;
	
__be32	callFramingType;
};


struct PptpClearCallRequest {
	
__be16	callID;
	
__u16	reserved;
};


struct PptpCallDisconnectNotify {
	
__be16	callID;
	
__u8	resultCode;
	
__u8	generalErrorCode;
	
__be16	causeCode;
	
__u16	reserved;
	
__u8	callStatistics[128];
};


struct PptpWanErrorNotify {
	
__be16	peersCallID;
	
__u16	reserved;
	
__be32	crcErrors;
	
__be32	framingErrors;
	
__be32	hardwareOverRuns;
	
__be32	bufferOverRuns;
	
__be32	timeoutErrors;
	
__be32	alignmentErrors;
};


struct PptpSetLinkInfo {
	
__be16	peersCallID;
	
__u16	reserved;
	
__be32	sendAccm;
	
__be32	recvAccm;
};


union pptp_ctrl_union {
	
struct PptpStartSessionRequest	sreq;
	
struct PptpStartSessionReply	srep;
	
struct PptpStopSessionRequest	streq;
	
struct PptpStopSessionReply	strep;
	
struct PptpOutCallRequest	ocreq;
	
struct PptpOutCallReply		ocack;
	
struct PptpInCallRequest	icreq;
	
struct PptpInCallReply		icack;
	
struct PptpInCallConnected	iccon;
	
struct PptpClearCallRequest	clrreq;
	
struct PptpCallDisconnectNotify disc;
	
struct PptpWanErrorNotify	wanerr;
	
struct PptpSetLinkInfo		setlink;
};

/* crap needed for nf_conntrack_compat.h */
struct nf_conn;
struct nf_conntrack_expect;

extern int
(*nf_nat_pptp_hook_outbound)(struct sk_buff *skb,
			     struct nf_conn *ct, enum ip_conntrack_info ctinfo,
			     unsigned int protoff,
			     struct PptpControlHeader *ctlh,
			     union pptp_ctrl_union *pptpReq);

extern int
(*nf_nat_pptp_hook_inbound)(struct sk_buff *skb,
			    struct nf_conn *ct, enum ip_conntrack_info ctinfo,
			    unsigned int protoff,
			    struct PptpControlHeader *ctlh,
			    union pptp_ctrl_union *pptpReq);

extern void
(*nf_nat_pptp_hook_exp_gre)(struct nf_conntrack_expect *exp_orig,
			    struct nf_conntrack_expect *exp_reply);

extern void
(*nf_nat_pptp_hook_expectfn)(struct nf_conn *ct,
			     struct nf_conntrack_expect *exp);

#endif /* __KERNEL__ */
#endif /* _NF_CONNTRACK_PPTP_H */
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