83 lines
2.4 KiB
C
83 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 {
|
|
__kernel_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
|