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>
24 /* Structure used to connect() the socket to a particular tunnel UDP
27 struct pppol2tp_addr
{
28 __kernel_pid_t pid
; /* pid that owns the fd.
30 int fd
; /* FD of UDP socket to use */
32 struct sockaddr_in addr
; /* IP address and port to send to */
34 __u16 s_tunnel
, s_session
; /* For matching incoming packets */
35 __u16 d_tunnel
, d_session
; /* For sending outgoing packets */
38 /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
39 * bits. So we need a different sockaddr structure.
41 struct pppol2tpv3_addr
{
42 pid_t pid
; /* pid that owns the fd.
44 int fd
; /* FD of UDP or IP socket to use */
46 struct sockaddr_in addr
; /* IP address and port to send to */
48 __u32 s_tunnel
, s_session
; /* For matching incoming packets */
49 __u32 d_tunnel
, d_session
; /* For sending outgoing packets */
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.
60 * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder.
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,
70 /* Debug message categories for the DEBUG socket option */
72 PPPOL2TP_MSG_DEBUG
= (1 << 0), /* verbose debug (if
74 PPPOL2TP_MSG_CONTROL
= (1 << 1), /* userspace - kernel
76 PPPOL2TP_MSG_SEQ
= (1 << 2), /* sequence numbers */
77 PPPOL2TP_MSG_DATA
= (1 << 3), /* data packets */
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