1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linu 1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /********************************************* 2 /***************************************************************************
3 * Linux PPP over L2TP (PPPoL2TP) Socket Imple 3 * Linux PPP over L2TP (PPPoL2TP) Socket Implementation (RFC 2661)
4 * 4 *
5 * This file supplies definitions required by 5 * This file supplies definitions required by the PPP over L2TP driver
6 * (l2tp_ppp.c). All version information wrt 6 * (l2tp_ppp.c). All version information wrt this file is located in l2tp_ppp.c
7 * 7 *
8 * License: 8 * License:
9 * This program is free software; 9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of t 10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Softw 11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your 12 * 2 of the License, or (at your option) any later version.
13 * 13 *
14 */ 14 */
15 15
16 #ifndef _UAPI__LINUX_IF_PPPOL2TP_H 16 #ifndef _UAPI__LINUX_IF_PPPOL2TP_H
17 #define _UAPI__LINUX_IF_PPPOL2TP_H 17 #define _UAPI__LINUX_IF_PPPOL2TP_H
18 18
19 #include <linux/types.h> 19 #include <linux/types.h>
20 #include <linux/in.h> 20 #include <linux/in.h>
21 #include <linux/in6.h> 21 #include <linux/in6.h>
22 #include <linux/l2tp.h> 22 #include <linux/l2tp.h>
23 23
24 /* Structure used to connect() the socket to a 24 /* Structure used to connect() the socket to a particular tunnel UDP
25 * socket over IPv4. 25 * socket over IPv4.
26 */ 26 */
27 struct pppol2tp_addr { 27 struct pppol2tp_addr {
28 __kernel_pid_t pid; /* pid 28 __kernel_pid_t pid; /* pid that owns the fd.
29 * 0 = 29 * 0 => current */
30 int fd; /* FD 30 int fd; /* FD of UDP socket to use */
31 31
32 struct sockaddr_in addr; /* IP 32 struct sockaddr_in addr; /* IP address and port to send to */
33 33
34 __u16 s_tunnel, s_session; /* For 34 __u16 s_tunnel, s_session; /* For matching incoming packets */
35 __u16 d_tunnel, d_session; /* For 35 __u16 d_tunnel, d_session; /* For sending outgoing packets */
36 }; 36 };
37 37
38 /* Structure used to connect() the socket to a 38 /* Structure used to connect() the socket to a particular tunnel UDP
39 * socket over IPv6. 39 * socket over IPv6.
40 */ 40 */
41 struct pppol2tpin6_addr { 41 struct pppol2tpin6_addr {
42 __kernel_pid_t pid; /* pid 42 __kernel_pid_t pid; /* pid that owns the fd.
43 * 0 = 43 * 0 => current */
44 int fd; /* FD 44 int fd; /* FD of UDP socket to use */
45 45
46 __u16 s_tunnel, s_session; /* For 46 __u16 s_tunnel, s_session; /* For matching incoming packets */
47 __u16 d_tunnel, d_session; /* For 47 __u16 d_tunnel, d_session; /* For sending outgoing packets */
48 48
49 struct sockaddr_in6 addr; /* IP 49 struct sockaddr_in6 addr; /* IP address and port to send to */
50 }; 50 };
51 51
52 /* The L2TPv3 protocol changes tunnel and sess 52 /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
53 * bits. So we need a different sockaddr struc 53 * bits. So we need a different sockaddr structure.
54 */ 54 */
55 struct pppol2tpv3_addr { 55 struct pppol2tpv3_addr {
56 __kernel_pid_t pid; /* pid 56 __kernel_pid_t pid; /* pid that owns the fd.
57 * 0 = 57 * 0 => current */
58 int fd; /* FD 58 int fd; /* FD of UDP or IP socket to use */
59 59
60 struct sockaddr_in addr; /* IP 60 struct sockaddr_in addr; /* IP address and port to send to */
61 61
62 __u32 s_tunnel, s_session; /* For 62 __u32 s_tunnel, s_session; /* For matching incoming packets */
63 __u32 d_tunnel, d_session; /* For 63 __u32 d_tunnel, d_session; /* For sending outgoing packets */
64 }; 64 };
65 65
66 struct pppol2tpv3in6_addr { 66 struct pppol2tpv3in6_addr {
67 __kernel_pid_t pid; /* pid 67 __kernel_pid_t pid; /* pid that owns the fd.
68 * 0 = 68 * 0 => current */
69 int fd; /* FD 69 int fd; /* FD of UDP or IP socket to use */
70 70
71 __u32 s_tunnel, s_session; /* For 71 __u32 s_tunnel, s_session; /* For matching incoming packets */
72 __u32 d_tunnel, d_session; /* For 72 __u32 d_tunnel, d_session; /* For sending outgoing packets */
73 73
74 struct sockaddr_in6 addr; /* IP 74 struct sockaddr_in6 addr; /* IP address and port to send to */
75 }; 75 };
76 76
77 /* Socket options: 77 /* Socket options:
78 * DEBUG - bitmask of debug message cat 78 * DEBUG - bitmask of debug message categories (not used)
79 * SENDSEQ - 0 => don't send packets with 79 * SENDSEQ - 0 => don't send packets with sequence numbers
80 * 1 => send packets with seque 80 * 1 => send packets with sequence numbers
81 * RECVSEQ - 0 => receive packet sequence 81 * RECVSEQ - 0 => receive packet sequence numbers are optional
82 * 1 => drop receive packets wi 82 * 1 => drop receive packets without sequence numbers
83 * LNSMODE - 0 => act as LAC. 83 * LNSMODE - 0 => act as LAC.
84 * 1 => act as LNS. 84 * 1 => act as LNS.
85 * REORDERTO - reorder timeout (in millisec 85 * REORDERTO - reorder timeout (in millisecs). If 0, don't try to reorder.
86 */ 86 */
87 enum { 87 enum {
88 PPPOL2TP_SO_DEBUG = 1, 88 PPPOL2TP_SO_DEBUG = 1,
89 PPPOL2TP_SO_RECVSEQ = 2, 89 PPPOL2TP_SO_RECVSEQ = 2,
90 PPPOL2TP_SO_SENDSEQ = 3, 90 PPPOL2TP_SO_SENDSEQ = 3,
91 PPPOL2TP_SO_LNSMODE = 4, 91 PPPOL2TP_SO_LNSMODE = 4,
92 PPPOL2TP_SO_REORDERTO = 5, 92 PPPOL2TP_SO_REORDERTO = 5,
93 }; 93 };
94 94
95 /* Debug message categories for the DEBUG sock 95 /* Debug message categories for the DEBUG socket option (deprecated) */
96 enum { 96 enum {
97 PPPOL2TP_MSG_DEBUG = L2TP_MSG_DEB 97 PPPOL2TP_MSG_DEBUG = L2TP_MSG_DEBUG,
98 PPPOL2TP_MSG_CONTROL = L2TP_MSG_CON 98 PPPOL2TP_MSG_CONTROL = L2TP_MSG_CONTROL,
99 PPPOL2TP_MSG_SEQ = L2TP_MSG_SEQ 99 PPPOL2TP_MSG_SEQ = L2TP_MSG_SEQ,
100 PPPOL2TP_MSG_DATA = L2TP_MSG_DAT 100 PPPOL2TP_MSG_DATA = L2TP_MSG_DATA,
101 }; 101 };
102 102
103 103
104 104
105 #endif /* _UAPI__LINUX_IF_PPPOL2TP_H */ 105 #endif /* _UAPI__LINUX_IF_PPPOL2TP_H */
106 106
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