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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 | ||
20 | #include <asm/types.h> | |
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; | |
62 | }__attribute__ ((packed)); | |
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; | |
73 | }__attribute__ ((packed)); | |
1da177e4 LT |
74 | |
75 | /********************************************************************* | |
76 | * | |
77 | * ioctl interface for defining forwarding of connections | |
78 | * | |
79 | ********************************************************************/ | |
80 | ||
81 | #define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t) | |
82 | #define PPPOEIOCDFWD _IO(0xB1 ,1) | |
83 | /*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/ | |
84 | ||
85 | /* Codes to identify message types */ | |
86 | #define PADI_CODE 0x09 | |
87 | #define PADO_CODE 0x07 | |
88 | #define PADR_CODE 0x19 | |
89 | #define PADS_CODE 0x65 | |
90 | #define PADT_CODE 0xa7 | |
91 | struct pppoe_tag { | |
b963dc1d AV |
92 | __be16 tag_type; |
93 | __be16 tag_len; | |
1da177e4 LT |
94 | char tag_data[0]; |
95 | } __attribute ((packed)); | |
96 | ||
97 | /* Tag identifiers */ | |
98 | #define PTT_EOL __constant_htons(0x0000) | |
99 | #define PTT_SRV_NAME __constant_htons(0x0101) | |
100 | #define PTT_AC_NAME __constant_htons(0x0102) | |
101 | #define PTT_HOST_UNIQ __constant_htons(0x0103) | |
102 | #define PTT_AC_COOKIE __constant_htons(0x0104) | |
103 | #define PTT_VENDOR __constant_htons(0x0105) | |
104 | #define PTT_RELAY_SID __constant_htons(0x0110) | |
105 | #define PTT_SRV_ERR __constant_htons(0x0201) | |
106 | #define PTT_SYS_ERR __constant_htons(0x0202) | |
107 | #define PTT_GEN_ERR __constant_htons(0x0203) | |
108 | ||
109 | struct pppoe_hdr { | |
110 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
111 | __u8 ver : 4; | |
112 | __u8 type : 4; | |
113 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
114 | __u8 type : 4; | |
115 | __u8 ver : 4; | |
116 | #else | |
117 | #error "Please fix <asm/byteorder.h>" | |
118 | #endif | |
119 | __u8 code; | |
b963dc1d AV |
120 | __be16 sid; |
121 | __be16 length; | |
1da177e4 LT |
122 | struct pppoe_tag tag[0]; |
123 | } __attribute__ ((packed)); | |
124 | ||
516299d2 MM |
125 | /* Length of entire PPPoE + PPP header */ |
126 | #define PPPOE_SES_HLEN 8 | |
127 | ||
1da177e4 | 128 | #ifdef __KERNEL__ |
797659fb ACM |
129 | #include <linux/skbuff.h> |
130 | ||
131 | static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb) | |
132 | { | |
d56f90a7 | 133 | return (struct pppoe_hdr *)skb_network_header(skb); |
797659fb ACM |
134 | } |
135 | ||
1da177e4 LT |
136 | struct pppoe_opt { |
137 | struct net_device *dev; /* device associated with socket*/ | |
6f30e186 | 138 | int ifindex; /* ifindex of device associated with socket */ |
1da177e4 LT |
139 | struct pppoe_addr pa; /* what this socket is bound to*/ |
140 | struct sockaddr_pppox relay; /* what socket data will be | |
141 | relayed to (PPPoE relaying) */ | |
142 | }; | |
143 | ||
144 | #include <net/sock.h> | |
145 | ||
146 | struct pppox_sock { | |
147 | /* struct sock must be the first member of pppox_sock */ | |
148 | struct sock sk; | |
149 | struct ppp_channel chan; | |
150 | struct pppox_sock *next; /* for hash table */ | |
151 | union { | |
152 | struct pppoe_opt pppoe; | |
153 | } proto; | |
b963dc1d | 154 | __be16 num; |
1da177e4 LT |
155 | }; |
156 | #define pppoe_dev proto.pppoe.dev | |
6f30e186 | 157 | #define pppoe_ifindex proto.pppoe.ifindex |
1da177e4 LT |
158 | #define pppoe_pa proto.pppoe.pa |
159 | #define pppoe_relay proto.pppoe.relay | |
160 | ||
161 | static inline struct pppox_sock *pppox_sk(struct sock *sk) | |
162 | { | |
163 | return (struct pppox_sock *)sk; | |
164 | } | |
165 | ||
166 | static inline struct sock *sk_pppox(struct pppox_sock *po) | |
167 | { | |
168 | return (struct sock *)po; | |
169 | } | |
170 | ||
171 | struct module; | |
172 | ||
173 | struct pppox_proto { | |
1b8d7ae4 | 174 | int (*create)(struct net *net, struct socket *sock); |
1da177e4 LT |
175 | int (*ioctl)(struct socket *sock, unsigned int cmd, |
176 | unsigned long arg); | |
177 | struct module *owner; | |
178 | }; | |
179 | ||
180 | extern int register_pppox_proto(int proto_num, struct pppox_proto *pp); | |
181 | extern void unregister_pppox_proto(int proto_num); | |
182 | extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */ | |
17ba15fb | 183 | extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); |
1da177e4 LT |
184 | |
185 | /* PPPoX socket states */ | |
186 | enum { | |
187 | PPPOX_NONE = 0, /* initial state */ | |
188 | PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */ | |
189 | PPPOX_BOUND = 2, /* bound to ppp device */ | |
190 | PPPOX_RELAY = 4, /* forwarding is enabled */ | |
191 | PPPOX_ZOMBIE = 8, /* dead, but still bound to ppp device */ | |
192 | PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/ | |
193 | }; | |
194 | ||
195 | #endif /* __KERNEL__ */ | |
196 | ||
197 | #endif /* !(__LINUX_IF_PPPOX_H) */ |