linux-stable/include/linux/if_pppol2tp.h
James Chapman e0d4435f93 l2tp: Update PPP-over-L2TP driver to work over L2TPv3
This patch makes changes to the L2TP PPP code for L2TPv3.

The existing code has some assumptions about the L2TP header which are
broken by L2TPv3. Also the sockaddr_pppol2tp structure of the original
code is too small to support the increased size of the L2TPv3 tunnel
and session id, so a new sockaddr_pppol2tpv3 structure is needed. In
the socket calls, the size of this structure is used to tell if the
operation is for L2TPv2 or L2TPv3.

Signed-off-by: James Chapman <jchapman@katalix.com>
Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-03 14:56:04 -07:00

82 lines
2.4 KiB
C

/***************************************************************************
* Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
*
* This file supplies definitions required by the PPP over L2TP driver
* (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.c
*
* License:
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#ifndef __LINUX_IF_PPPOL2TP_H
#define __LINUX_IF_PPPOL2TP_H
#include <linux/types.h>
#ifdef __KERNEL__
#include <linux/in.h>
#endif
/* Structure used to connect() the socket to a particular tunnel UDP
* socket.
*/
struct pppol2tp_addr {
__kernel_pid_t pid; /* pid that owns the fd.
* 0 => current */
int fd; /* FD of UDP socket to use */
struct sockaddr_in addr; /* IP address and port to send to */
__u16 s_tunnel, s_session; /* For matching incoming packets */
__u16 d_tunnel, d_session; /* For sending outgoing packets */
};
/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
* bits. So we need a different sockaddr structure.
*/
struct pppol2tpv3_addr {
pid_t pid; /* pid that owns the fd.
* 0 => current */
int fd; /* FD of UDP or IP socket to use */
struct sockaddr_in addr; /* IP address and port to send to */
__u32 s_tunnel, s_session; /* For matching incoming packets */
__u32 d_tunnel, d_session; /* For sending outgoing packets */
};
/* Socket options:
* DEBUG - bitmask of debug message categories
* SENDSEQ - 0 => don't send packets with sequence numbers
* 1 => send packets with sequence numbers
* RECVSEQ - 0 => receive packet sequence numbers are optional
* 1 => drop receive packets without sequence numbers
* LNSMODE - 0 => act as LAC.
* 1 => act as LNS.
* REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder.
*/
enum {
PPPOL2TP_SO_DEBUG = 1,
PPPOL2TP_SO_RECVSEQ = 2,
PPPOL2TP_SO_SENDSEQ = 3,
PPPOL2TP_SO_LNSMODE = 4,
PPPOL2TP_SO_REORDERTO = 5,
};
/* Debug message categories for the DEBUG socket option */
enum {
PPPOL2TP_MSG_DEBUG = (1 << 0), /* verbose debug (if
* compiled in) */
PPPOL2TP_MSG_CONTROL = (1 << 1), /* userspace - kernel
* interface */
PPPOL2TP_MSG_SEQ = (1 << 2), /* sequence numbers */
PPPOL2TP_MSG_DATA = (1 << 3), /* data packets */
};
#endif