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James Chapmancf14a4d2007-06-27 15:43:43 -07001/***************************************************************************
2 * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
3 *
4 * This file supplies definitions required by the PPP over L2TP driver
James Chapmanfd558d12010-04-02 06:18:33 +00005 * (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.c
James Chapmancf14a4d2007-06-27 15:43:43 -07006 *
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
Jaswinder Singh Rajput00bfdda2009-01-15 13:51:26 -080018#include <linux/types.h>
James Chapmancf14a4d2007-06-27 15:43:43 -070019
20#ifdef __KERNEL__
21#include <linux/in.h>
22#endif
23
24/* Structure used to connect() the socket to a particular tunnel UDP
25 * socket.
26 */
Eric Dumazetd94d9fe2009-11-04 09:50:58 -080027struct pppol2tp_addr {
Arnd Bergmann85efde62009-02-26 00:51:39 +010028 __kernel_pid_t pid; /* pid that owns the fd.
James Chapmancf14a4d2007-06-27 15:43:43 -070029 * 0 => current */
30 int fd; /* FD of UDP socket to use */
31
32 struct sockaddr_in addr; /* IP address and port to send to */
33
Al Virof424bb92007-08-24 23:04:18 -070034 __u16 s_tunnel, s_session; /* For matching incoming packets */
35 __u16 d_tunnel, d_session; /* For sending outgoing packets */
James Chapmancf14a4d2007-06-27 15:43:43 -070036};
37
James Chapmane0d44352010-04-02 06:18:54 +000038/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
39 * bits. So we need a different sockaddr structure.
40 */
41struct pppol2tpv3_addr {
42 pid_t pid; /* pid that owns the fd.
43 * 0 => current */
44 int fd; /* FD of UDP or IP socket to use */
45
46 struct sockaddr_in addr; /* IP address and port to send to */
47
48 __u32 s_tunnel, s_session; /* For matching incoming packets */
49 __u32 d_tunnel, d_session; /* For sending outgoing packets */
50};
51
James Chapmancf14a4d2007-06-27 15:43:43 -070052/* Socket options:
53 * DEBUG - bitmask of debug message categories
54 * SENDSEQ - 0 => don't send packets with sequence numbers
55 * 1 => send packets with sequence numbers
56 * RECVSEQ - 0 => receive packet sequence numbers are optional
57 * 1 => drop receive packets without sequence numbers
58 * LNSMODE - 0 => act as LAC.
59 * 1 => act as LNS.
60 * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder.
61 */
62enum {
63 PPPOL2TP_SO_DEBUG = 1,
64 PPPOL2TP_SO_RECVSEQ = 2,
65 PPPOL2TP_SO_SENDSEQ = 3,
66 PPPOL2TP_SO_LNSMODE = 4,
67 PPPOL2TP_SO_REORDERTO = 5,
68};
69
70/* Debug message categories for the DEBUG socket option */
71enum {
72 PPPOL2TP_MSG_DEBUG = (1 << 0), /* verbose debug (if
73 * compiled in) */
74 PPPOL2TP_MSG_CONTROL = (1 << 1), /* userspace - kernel
75 * interface */
76 PPPOL2TP_MSG_SEQ = (1 << 2), /* sequence numbers */
77 PPPOL2TP_MSG_DATA = (1 << 3), /* data packets */
78};
79
80
81
82#endif