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1 /***************************************************************************
2 * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
4 * This file supplies definitions required by the PPP over L2TP driver
5 * (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.c
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.
15 #ifndef __LINUX_IF_PPPOL2TP_H
16 #define __LINUX_IF_PPPOL2TP_H
18 #include <linux/types.h>
22 #include <linux/in6.h>
25 /* Structure used to connect() the socket to a particular tunnel UDP
28 struct pppol2tp_addr
{
29 __kernel_pid_t pid
; /* pid that owns the fd.
31 int fd
; /* FD of UDP socket to use */
33 struct sockaddr_in addr
; /* IP address and port to send to */
35 __u16 s_tunnel
, s_session
; /* For matching incoming packets */
36 __u16 d_tunnel
, d_session
; /* For sending outgoing packets */
39 /* Structure used to connect() the socket to a particular tunnel UDP
42 struct pppol2tpin6_addr
{
43 __kernel_pid_t pid
; /* pid that owns the fd.
45 int fd
; /* FD of UDP socket to use */
47 __u16 s_tunnel
, s_session
; /* For matching incoming packets */
48 __u16 d_tunnel
, d_session
; /* For sending outgoing packets */
50 struct sockaddr_in6 addr
; /* IP address and port to send to */
53 /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
54 * bits. So we need a different sockaddr structure.
56 struct pppol2tpv3_addr
{
57 __kernel_pid_t pid
; /* pid that owns the fd.
59 int fd
; /* FD of UDP or IP socket to use */
61 struct sockaddr_in addr
; /* IP address and port to send to */
63 __u32 s_tunnel
, s_session
; /* For matching incoming packets */
64 __u32 d_tunnel
, d_session
; /* For sending outgoing packets */
67 struct pppol2tpv3in6_addr
{
68 __kernel_pid_t pid
; /* pid that owns the fd.
70 int fd
; /* FD of UDP or IP socket to use */
72 __u32 s_tunnel
, s_session
; /* For matching incoming packets */
73 __u32 d_tunnel
, d_session
; /* For sending outgoing packets */
75 struct sockaddr_in6 addr
; /* IP address and port to send to */
79 * DEBUG - bitmask of debug message categories
80 * SENDSEQ - 0 => don't send packets with sequence numbers
81 * 1 => send packets with sequence numbers
82 * RECVSEQ - 0 => receive packet sequence numbers are optional
83 * 1 => drop receive packets without sequence numbers
84 * LNSMODE - 0 => act as LAC.
86 * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder.
89 PPPOL2TP_SO_DEBUG
= 1,
90 PPPOL2TP_SO_RECVSEQ
= 2,
91 PPPOL2TP_SO_SENDSEQ
= 3,
92 PPPOL2TP_SO_LNSMODE
= 4,
93 PPPOL2TP_SO_REORDERTO
= 5,
96 /* Debug message categories for the DEBUG socket option */
98 PPPOL2TP_MSG_DEBUG
= (1 << 0), /* verbose debug (if
100 PPPOL2TP_MSG_CONTROL
= (1 << 1), /* userspace - kernel
102 PPPOL2TP_MSG_SEQ
= (1 << 2), /* sequence numbers */
103 PPPOL2TP_MSG_DATA
= (1 << 3), /* data packets */