1/***************************************************************************
2 * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
3 *
4 * This file supplies definitions required by the PPP over L2TP driver
5 * (pppol2tp.c).  All version information wrt this file is located in pppol2tp.c
6 *
7 * License:
8 *		This program is free software; you can redistribute it and/or
9 *		modify it under the terms of the GNU General Public License
10 *		as published by the Free Software Foundation; either version
11 *		2 of the License, or (at your option) any later version.
12 *
13 */
14
15#ifndef __LINUX_IF_PPPOL2TP_H
16#define __LINUX_IF_PPPOL2TP_H
17
18#include <asm/types.h>
19
20#ifdef __KERNEL__
21#include <linux/in.h>
22#endif
23
24/* Structure used to bind() the socket to a particular socket & tunnel */
25struct pppol2tp_addr
26{
27	pid_t	pid;			/* pid that owns the fd.
28					 * 0 => current */
29	int	fd;			/* FD of UDP socket to use */
30
31	struct sockaddr_in addr;	/* IP address and port to send to */
32
33	__u16 s_tunnel, s_session;	/* For matching incoming packets */
34	__u16 d_tunnel, d_session;	/* For sending outgoing packets */
35};
36
37/* Socket options:
38 * DEBUG	- bitmask of debug message categories
39 * SENDSEQ	- 0 => don't send packets with sequence numbers
40 *		  1 => send packets with sequence numbers
41 * RECVSEQ	- 0 => receive packet sequence numbers are optional
42 *		  1 => drop receive packets without sequence numbers
43 * LNSMODE	- 0 => act as LAC.
44 *		  1 => act as LNS.
45 * REORDERTO	- reorder timeout (in millisecs). If 0, don't try to reorder.
46 */
47enum {
48	PPPOL2TP_SO_DEBUG	= 1,
49	PPPOL2TP_SO_RECVSEQ	= 2,
50	PPPOL2TP_SO_SENDSEQ	= 3,
51	PPPOL2TP_SO_LNSMODE	= 4,
52	PPPOL2TP_SO_REORDERTO	= 5,
53};
54
55/* Debug message categories for the DEBUG socket option */
56enum {
57	PPPOL2TP_MSG_DEBUG	= (1 << 0),	/* verbose debug (if
58						 * compiled in) */
59	PPPOL2TP_MSG_CONTROL	= (1 << 1),	/* userspace - kernel
60						 * interface */
61	PPPOL2TP_MSG_SEQ	= (1 << 2),	/* sequence numbers */
62	PPPOL2TP_MSG_DATA	= (1 << 3),	/* data packets */
63};
64
65
66
67#endif
68