1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
2 | /*************************************************************************** |
3 | * Linux PPP over X - Generic PPP transport layer sockets |
4 | * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516) |
5 | * |
6 | * This file supplies definitions required by the PPP over Ethernet driver |
7 | * (pppox.c). All version information wrt this file is located in pppox.c |
8 | * |
9 | * License: |
10 | * This program is free software; you can redistribute it and/or |
11 | * modify it under the terms of the GNU General Public License |
12 | * as published by the Free Software Foundation; either version |
13 | * 2 of the License, or (at your option) any later version. |
14 | * |
15 | */ |
16 | |
17 | #ifndef _UAPI__LINUX_IF_PPPOX_H |
18 | #define _UAPI__LINUX_IF_PPPOX_H |
19 | |
20 | |
21 | #include <linux/types.h> |
22 | #include <asm/byteorder.h> |
23 | |
24 | #include <linux/socket.h> |
25 | #include <linux/if.h> |
26 | #include <linux/if_ether.h> |
27 | #include <linux/if_pppol2tp.h> |
28 | #include <linux/in.h> |
29 | #include <linux/in6.h> |
30 | |
31 | /* For user-space programs to pick up these definitions |
32 | * which they wouldn't get otherwise without defining __KERNEL__ |
33 | */ |
34 | #ifndef AF_PPPOX |
35 | #define AF_PPPOX 24 |
36 | #define PF_PPPOX AF_PPPOX |
37 | #endif /* !(AF_PPPOX) */ |
38 | |
39 | /************************************************************************ |
40 | * PPPoE addressing definition |
41 | */ |
42 | typedef __be16 sid_t; |
43 | struct pppoe_addr { |
44 | sid_t sid; /* Session identifier */ |
45 | unsigned char remote[ETH_ALEN]; /* Remote address */ |
46 | char dev[IFNAMSIZ]; /* Local device to use */ |
47 | }; |
48 | |
49 | /************************************************************************ |
50 | * PPTP addressing definition |
51 | */ |
52 | struct pptp_addr { |
53 | __u16 call_id; |
54 | struct in_addr sin_addr; |
55 | }; |
56 | |
57 | /************************************************************************ |
58 | * Protocols supported by AF_PPPOX |
59 | */ |
60 | #define PX_PROTO_OE 0 /* Currently just PPPoE */ |
61 | #define PX_PROTO_OL2TP 1 /* Now L2TP also */ |
62 | #define PX_PROTO_PPTP 2 |
63 | #define PX_MAX_PROTO 3 |
64 | |
65 | struct sockaddr_pppox { |
66 | __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ |
67 | unsigned int sa_protocol; /* protocol identifier */ |
68 | union { |
69 | struct pppoe_addr pppoe; |
70 | struct pptp_addr pptp; |
71 | } sa_addr; |
72 | } __packed; |
73 | |
74 | /* The use of the above union isn't viable because the size of this |
75 | * struct must stay fixed over time -- applications use sizeof(struct |
76 | * sockaddr_pppox) to fill it. We use a protocol specific sockaddr |
77 | * type instead. |
78 | */ |
79 | struct sockaddr_pppol2tp { |
80 | __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ |
81 | unsigned int sa_protocol; /* protocol identifier */ |
82 | struct pppol2tp_addr pppol2tp; |
83 | } __packed; |
84 | |
85 | struct sockaddr_pppol2tpin6 { |
86 | __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ |
87 | unsigned int sa_protocol; /* protocol identifier */ |
88 | struct pppol2tpin6_addr pppol2tp; |
89 | } __packed; |
90 | |
91 | /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 |
92 | * bits. So we need a different sockaddr structure. |
93 | */ |
94 | struct sockaddr_pppol2tpv3 { |
95 | __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ |
96 | unsigned int sa_protocol; /* protocol identifier */ |
97 | struct pppol2tpv3_addr pppol2tp; |
98 | } __packed; |
99 | |
100 | struct sockaddr_pppol2tpv3in6 { |
101 | __kernel_sa_family_t sa_family; /* address family, AF_PPPOX */ |
102 | unsigned int sa_protocol; /* protocol identifier */ |
103 | struct pppol2tpv3in6_addr pppol2tp; |
104 | } __packed; |
105 | |
106 | /********************************************************************* |
107 | * |
108 | * ioctl interface for defining forwarding of connections |
109 | * |
110 | ********************************************************************/ |
111 | |
112 | #define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t) |
113 | #define PPPOEIOCDFWD _IO(0xB1 ,1) |
114 | /*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/ |
115 | |
116 | /* Codes to identify message types */ |
117 | #define PADI_CODE 0x09 |
118 | #define PADO_CODE 0x07 |
119 | #define PADR_CODE 0x19 |
120 | #define PADS_CODE 0x65 |
121 | #define PADT_CODE 0xa7 |
122 | struct pppoe_tag { |
123 | __be16 tag_type; |
124 | __be16 tag_len; |
125 | char tag_data[]; |
126 | } __attribute__ ((packed)); |
127 | |
128 | /* Tag identifiers */ |
129 | #define PTT_EOL __cpu_to_be16(0x0000) |
130 | #define PTT_SRV_NAME __cpu_to_be16(0x0101) |
131 | #define PTT_AC_NAME __cpu_to_be16(0x0102) |
132 | #define PTT_HOST_UNIQ __cpu_to_be16(0x0103) |
133 | #define PTT_AC_COOKIE __cpu_to_be16(0x0104) |
134 | #define PTT_VENDOR __cpu_to_be16(0x0105) |
135 | #define PTT_RELAY_SID __cpu_to_be16(0x0110) |
136 | #define PTT_SRV_ERR __cpu_to_be16(0x0201) |
137 | #define PTT_SYS_ERR __cpu_to_be16(0x0202) |
138 | #define PTT_GEN_ERR __cpu_to_be16(0x0203) |
139 | |
140 | struct pppoe_hdr { |
141 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
142 | __u8 type : 4; |
143 | __u8 ver : 4; |
144 | #elif defined(__BIG_ENDIAN_BITFIELD) |
145 | __u8 ver : 4; |
146 | __u8 type : 4; |
147 | #else |
148 | #error "Please fix <asm/byteorder.h>" |
149 | #endif |
150 | __u8 code; |
151 | __be16 sid; |
152 | __be16 length; |
153 | struct pppoe_tag tag[]; |
154 | } __packed; |
155 | |
156 | /* Length of entire PPPoE + PPP header */ |
157 | #define PPPOE_SES_HLEN 8 |
158 | |
159 | |
160 | #endif /* _UAPI__LINUX_IF_PPPOX_H */ |
161 | |