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David Howells607ca462012-10-13 10:46:48 +01001/***************************************************************************
2 * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
3 *
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
6 *
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 _UAPI__LINUX_IF_PPPOL2TP_H
16#define _UAPI__LINUX_IF_PPPOL2TP_H
17
18#include <linux/types.h>
19
20
21/* Structure used to connect() the socket to a particular tunnel UDP
22 * socket over IPv4.
23 */
24struct pppol2tp_addr {
25 __kernel_pid_t pid; /* pid that owns the fd.
26 * 0 => current */
27 int fd; /* FD of UDP socket to use */
28
29 struct sockaddr_in addr; /* IP address and port to send to */
30
31 __u16 s_tunnel, s_session; /* For matching incoming packets */
32 __u16 d_tunnel, d_session; /* For sending outgoing packets */
33};
34
35/* Structure used to connect() the socket to a particular tunnel UDP
36 * socket over IPv6.
37 */
38struct pppol2tpin6_addr {
39 __kernel_pid_t pid; /* pid that owns the fd.
40 * 0 => current */
41 int fd; /* FD of UDP socket to use */
42
43 __u16 s_tunnel, s_session; /* For matching incoming packets */
44 __u16 d_tunnel, d_session; /* For sending outgoing packets */
45
46 struct sockaddr_in6 addr; /* IP address and port to send to */
47};
48
49/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
50 * bits. So we need a different sockaddr structure.
51 */
52struct pppol2tpv3_addr {
53 __kernel_pid_t pid; /* pid that owns the fd.
54 * 0 => current */
55 int fd; /* FD of UDP or IP socket to use */
56
57 struct sockaddr_in addr; /* IP address and port to send to */
58
59 __u32 s_tunnel, s_session; /* For matching incoming packets */
60 __u32 d_tunnel, d_session; /* For sending outgoing packets */
61};
62
63struct pppol2tpv3in6_addr {
64 __kernel_pid_t pid; /* pid that owns the fd.
65 * 0 => current */
66 int fd; /* FD of UDP or IP socket to use */
67
68 __u32 s_tunnel, s_session; /* For matching incoming packets */
69 __u32 d_tunnel, d_session; /* For sending outgoing packets */
70
71 struct sockaddr_in6 addr; /* IP address and port to send to */
72};
73
74/* Socket options:
75 * DEBUG - bitmask of debug message categories
76 * SENDSEQ - 0 => don't send packets with sequence numbers
77 * 1 => send packets with sequence numbers
78 * RECVSEQ - 0 => receive packet sequence numbers are optional
79 * 1 => drop receive packets without sequence numbers
80 * LNSMODE - 0 => act as LAC.
81 * 1 => act as LNS.
82 * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder.
83 */
84enum {
85 PPPOL2TP_SO_DEBUG = 1,
86 PPPOL2TP_SO_RECVSEQ = 2,
87 PPPOL2TP_SO_SENDSEQ = 3,
88 PPPOL2TP_SO_LNSMODE = 4,
89 PPPOL2TP_SO_REORDERTO = 5,
90};
91
92/* Debug message categories for the DEBUG socket option */
93enum {
94 PPPOL2TP_MSG_DEBUG = (1 << 0), /* verbose debug (if
95 * compiled in) */
96 PPPOL2TP_MSG_CONTROL = (1 << 1), /* userspace - kernel
97 * interface */
98 PPPOL2TP_MSG_SEQ = (1 << 2), /* sequence numbers */
99 PPPOL2TP_MSG_DATA = (1 << 3), /* data packets */
100};
101
102
103
104#endif /* _UAPI__LINUX_IF_PPPOL2TP_H */