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1da177e4 LT |
1 | /*************************************************************************** |
2 | * Linux PPP over X - Generic PPP transport layer sockets | |
3 | * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516) | |
4 | * | |
5 | * This file supplies definitions required by the PPP over Ethernet driver | |
6 | * (pppox.c). All version information wrt this file is located in pppox.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 __LINUX_IF_PPPOX_H | |
17 | #define __LINUX_IF_PPPOX_H | |
18 | ||
19 | ||
00bfddaf | 20 | #include <linux/types.h> |
1da177e4 LT |
21 | #include <asm/byteorder.h> |
22 | ||
23 | #ifdef __KERNEL__ | |
24 | #include <linux/if_ether.h> | |
25 | #include <linux/if.h> | |
26 | #include <linux/netdevice.h> | |
1da177e4 LT |
27 | #include <linux/ppp_channel.h> |
28 | #endif /* __KERNEL__ */ | |
cf14a4d0 | 29 | #include <linux/if_pppol2tp.h> |
1da177e4 LT |
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 | */ | |
b963dc1d | 42 | typedef __be16 sid_t; |
1da177e4 LT |
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 | * Protocols supported by AF_PPPOX | |
51 | */ | |
52 | #define PX_PROTO_OE 0 /* Currently just PPPoE */ | |
cf14a4d0 JC |
53 | #define PX_PROTO_OL2TP 1 /* Now L2TP also */ |
54 | #define PX_MAX_PROTO 2 | |
55 | ||
1da177e4 LT |
56 | struct sockaddr_pppox { |
57 | sa_family_t sa_family; /* address family, AF_PPPOX */ | |
58 | unsigned int sa_protocol; /* protocol identifier */ | |
59 | union{ | |
60 | struct pppoe_addr pppoe; | |
61 | }sa_addr; | |
09cd2b99 | 62 | } __attribute__((packed)); |
1da177e4 | 63 | |
cf14a4d0 JC |
64 | /* The use of the above union isn't viable because the size of this |
65 | * struct must stay fixed over time -- applications use sizeof(struct | |
66 | * sockaddr_pppox) to fill it. We use a protocol specific sockaddr | |
67 | * type instead. | |
68 | */ | |
69 | struct sockaddr_pppol2tp { | |
70 | sa_family_t sa_family; /* address family, AF_PPPOX */ | |
71 | unsigned int sa_protocol; /* protocol identifier */ | |
72 | struct pppol2tp_addr pppol2tp; | |
09cd2b99 | 73 | } __attribute__((packed)); |
1da177e4 | 74 | |
e0d4435f JC |
75 | /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32 |
76 | * bits. So we need a different sockaddr structure. | |
77 | */ | |
78 | struct sockaddr_pppol2tpv3 { | |
79 | sa_family_t sa_family; /* address family, AF_PPPOX */ | |
80 | unsigned int sa_protocol; /* protocol identifier */ | |
81 | struct pppol2tpv3_addr pppol2tp; | |
09cd2b99 | 82 | } __attribute__((packed)); |
e0d4435f | 83 | |
1da177e4 LT |
84 | /********************************************************************* |
85 | * | |
86 | * ioctl interface for defining forwarding of connections | |
87 | * | |
88 | ********************************************************************/ | |
89 | ||
90 | #define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t) | |
91 | #define PPPOEIOCDFWD _IO(0xB1 ,1) | |
92 | /*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/ | |
93 | ||
94 | /* Codes to identify message types */ | |
95 | #define PADI_CODE 0x09 | |
96 | #define PADO_CODE 0x07 | |
97 | #define PADR_CODE 0x19 | |
98 | #define PADS_CODE 0x65 | |
99 | #define PADT_CODE 0xa7 | |
100 | struct pppoe_tag { | |
b963dc1d AV |
101 | __be16 tag_type; |
102 | __be16 tag_len; | |
1da177e4 | 103 | char tag_data[0]; |
09cd2b99 | 104 | } __attribute__ ((packed)); |
1da177e4 LT |
105 | |
106 | /* Tag identifiers */ | |
f3a7c66b HH |
107 | #define PTT_EOL __cpu_to_be16(0x0000) |
108 | #define PTT_SRV_NAME __cpu_to_be16(0x0101) | |
109 | #define PTT_AC_NAME __cpu_to_be16(0x0102) | |
110 | #define PTT_HOST_UNIQ __cpu_to_be16(0x0103) | |
111 | #define PTT_AC_COOKIE __cpu_to_be16(0x0104) | |
112 | #define PTT_VENDOR __cpu_to_be16(0x0105) | |
113 | #define PTT_RELAY_SID __cpu_to_be16(0x0110) | |
114 | #define PTT_SRV_ERR __cpu_to_be16(0x0201) | |
115 | #define PTT_SYS_ERR __cpu_to_be16(0x0202) | |
116 | #define PTT_GEN_ERR __cpu_to_be16(0x0203) | |
1da177e4 LT |
117 | |
118 | struct pppoe_hdr { | |
119 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
120 | __u8 ver : 4; | |
121 | __u8 type : 4; | |
122 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
123 | __u8 type : 4; | |
124 | __u8 ver : 4; | |
125 | #else | |
126 | #error "Please fix <asm/byteorder.h>" | |
127 | #endif | |
128 | __u8 code; | |
b963dc1d AV |
129 | __be16 sid; |
130 | __be16 length; | |
1da177e4 | 131 | struct pppoe_tag tag[0]; |
09cd2b99 | 132 | } __attribute__((packed)); |
1da177e4 | 133 | |
516299d2 MM |
134 | /* Length of entire PPPoE + PPP header */ |
135 | #define PPPOE_SES_HLEN 8 | |
136 | ||
1da177e4 | 137 | #ifdef __KERNEL__ |
797659fb ACM |
138 | #include <linux/skbuff.h> |
139 | ||
140 | static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb) | |
141 | { | |
d56f90a7 | 142 | return (struct pppoe_hdr *)skb_network_header(skb); |
797659fb ACM |
143 | } |
144 | ||
1da177e4 LT |
145 | struct pppoe_opt { |
146 | struct net_device *dev; /* device associated with socket*/ | |
6f30e186 | 147 | int ifindex; /* ifindex of device associated with socket */ |
1da177e4 LT |
148 | struct pppoe_addr pa; /* what this socket is bound to*/ |
149 | struct sockaddr_pppox relay; /* what socket data will be | |
150 | relayed to (PPPoE relaying) */ | |
151 | }; | |
152 | ||
153 | #include <net/sock.h> | |
154 | ||
155 | struct pppox_sock { | |
156 | /* struct sock must be the first member of pppox_sock */ | |
157 | struct sock sk; | |
158 | struct ppp_channel chan; | |
159 | struct pppox_sock *next; /* for hash table */ | |
160 | union { | |
161 | struct pppoe_opt pppoe; | |
162 | } proto; | |
b963dc1d | 163 | __be16 num; |
1da177e4 LT |
164 | }; |
165 | #define pppoe_dev proto.pppoe.dev | |
6f30e186 | 166 | #define pppoe_ifindex proto.pppoe.ifindex |
1da177e4 LT |
167 | #define pppoe_pa proto.pppoe.pa |
168 | #define pppoe_relay proto.pppoe.relay | |
169 | ||
170 | static inline struct pppox_sock *pppox_sk(struct sock *sk) | |
171 | { | |
172 | return (struct pppox_sock *)sk; | |
173 | } | |
174 | ||
175 | static inline struct sock *sk_pppox(struct pppox_sock *po) | |
176 | { | |
177 | return (struct sock *)po; | |
178 | } | |
179 | ||
180 | struct module; | |
181 | ||
182 | struct pppox_proto { | |
1b8d7ae4 | 183 | int (*create)(struct net *net, struct socket *sock); |
1da177e4 LT |
184 | int (*ioctl)(struct socket *sock, unsigned int cmd, |
185 | unsigned long arg); | |
186 | struct module *owner; | |
187 | }; | |
188 | ||
189 | extern int register_pppox_proto(int proto_num, struct pppox_proto *pp); | |
190 | extern void unregister_pppox_proto(int proto_num); | |
191 | extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */ | |
17ba15fb | 192 | extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); |
1da177e4 LT |
193 | |
194 | /* PPPoX socket states */ | |
195 | enum { | |
196 | PPPOX_NONE = 0, /* initial state */ | |
197 | PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */ | |
198 | PPPOX_BOUND = 2, /* bound to ppp device */ | |
199 | PPPOX_RELAY = 4, /* forwarding is enabled */ | |
200 | PPPOX_ZOMBIE = 8, /* dead, but still bound to ppp device */ | |
201 | PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/ | |
202 | }; | |
203 | ||
204 | #endif /* __KERNEL__ */ | |
205 | ||
206 | #endif /* !(__LINUX_IF_PPPOX_H) */ |