1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
2 | /*************************************************************************** |
3 | * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661) |
4 | * |
5 | * This file supplies definitions required by the PPP over L2TP driver |
6 | * (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.c |
7 | * |
8 | * License: |
9 | * This program is free software; you can redistribute it and/or |
10 | * modify it under the terms of the GNU General Public License |
11 | * as published by the Free Software Foundation; either version |
12 | * 2 of the License, or (at your option) any later version. |
13 | * |
14 | */ |
15 | |
16 | #ifndef _UAPI__LINUX_IF_PPPOL2TP_H |
17 | #define _UAPI__LINUX_IF_PPPOL2TP_H |
18 | |
19 | #include <linux/types.h> |
20 | #include <linux/in.h> |
21 | #include <linux/in6.h> |
22 | #include <linux/l2tp.h> |
23 | |
24 | /* Structure used to connect() the socket to a particular tunnel UDP |
25 | * socket over IPv4. |
26 | */ |
27 | struct pppol2tp_addr { |
28 | __kernel_pid_t pid; /* pid that owns the fd. |
29 | * 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 | |
34 | __u16 s_tunnel, s_session; /* For matching incoming packets */ |
35 | __u16 d_tunnel, d_session; /* For sending outgoing packets */ |
36 | }; |
37 | |
38 | /* Structure used to connect() the socket to a particular tunnel UDP |
39 | * socket over IPv6. |
40 | */ |
41 | struct pppol2tpin6_addr { |
42 | __kernel_pid_t pid; /* pid that owns the fd. |
43 | * 0 => current */ |
44 | int fd; /* FD of UDP socket to use */ |
45 | |
46 | __u16 s_tunnel, s_session; /* For matching incoming packets */ |
47 | __u16 d_tunnel, d_session; /* For sending outgoing packets */ |
48 | |
49 | struct sockaddr_in6 addr; /* IP address and port to send to */ |
50 | }; |
51 | |
52 | /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 |
53 | * bits. So we need a different sockaddr structure. |
54 | */ |
55 | struct pppol2tpv3_addr { |
56 | __kernel_pid_t pid; /* pid that owns the fd. |
57 | * 0 => current */ |
58 | int fd; /* FD of UDP or IP socket to use */ |
59 | |
60 | struct sockaddr_in addr; /* IP address and port to send to */ |
61 | |
62 | __u32 s_tunnel, s_session; /* For matching incoming packets */ |
63 | __u32 d_tunnel, d_session; /* For sending outgoing packets */ |
64 | }; |
65 | |
66 | struct pppol2tpv3in6_addr { |
67 | __kernel_pid_t pid; /* pid that owns the fd. |
68 | * 0 => current */ |
69 | int fd; /* FD of UDP or IP socket to use */ |
70 | |
71 | __u32 s_tunnel, s_session; /* For matching incoming packets */ |
72 | __u32 d_tunnel, d_session; /* For sending outgoing packets */ |
73 | |
74 | struct sockaddr_in6 addr; /* IP address and port to send to */ |
75 | }; |
76 | |
77 | /* Socket options: |
78 | * DEBUG - bitmask of debug message categories (not used) |
79 | * SENDSEQ - 0 => don't send packets with sequence numbers |
80 | * 1 => send packets with sequence numbers |
81 | * RECVSEQ - 0 => receive packet sequence numbers are optional |
82 | * 1 => drop receive packets without sequence numbers |
83 | * LNSMODE - 0 => act as LAC. |
84 | * 1 => act as LNS. |
85 | * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder. |
86 | */ |
87 | enum { |
88 | PPPOL2TP_SO_DEBUG = 1, |
89 | PPPOL2TP_SO_RECVSEQ = 2, |
90 | PPPOL2TP_SO_SENDSEQ = 3, |
91 | PPPOL2TP_SO_LNSMODE = 4, |
92 | PPPOL2TP_SO_REORDERTO = 5, |
93 | }; |
94 | |
95 | /* Debug message categories for the DEBUG socket option (deprecated) */ |
96 | enum { |
97 | PPPOL2TP_MSG_DEBUG = L2TP_MSG_DEBUG, |
98 | PPPOL2TP_MSG_CONTROL = L2TP_MSG_CONTROL, |
99 | PPPOL2TP_MSG_SEQ = L2TP_MSG_SEQ, |
100 | PPPOL2TP_MSG_DATA = L2TP_MSG_DATA, |
101 | }; |
102 | |
103 | |
104 | |
105 | #endif /* _UAPI__LINUX_IF_PPPOL2TP_H */ |
106 | |