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1 | /*************************************************************************** |
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 | */ | |
24 | struct 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 | */ | |
38 | struct 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 | */ | |
52 | struct 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 | ||
63 | struct 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 | */ | |
84 | enum { | |
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 */ | |
93 | enum { | |
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 */ |