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>
27 #include <linux/sched.h>
28 #include <asm/semaphore.h>
29 #include <linux/ppp_channel.h>
30 #endif /* __KERNEL__ */
31
32 /* For user-space programs to pick up these definitions
33 * which they wouldn't get otherwise without defining __KERNEL__
34 */
35 #ifndef AF_PPPOX
36 #define AF_PPPOX 24
37 #define PF_PPPOX AF_PPPOX
38 #endif /* !(AF_PPPOX) */
39
40 /************************************************************************
41 * PPPoE addressing definition
42 */
43 typedef __u16 sid_t;
44 struct pppoe_addr{
45 sid_t sid; /* Session identifier */
46 unsigned char remote[ETH_ALEN]; /* Remote address */
47 char dev[IFNAMSIZ]; /* Local device to use */
48 };
49
50 /************************************************************************
51 * Protocols supported by AF_PPPOX
52 */
53 #define PX_PROTO_OE 0 /* Currently just PPPoE */
54 #define PX_MAX_PROTO 1
55
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
64
65 /*********************************************************************
66 *
67 * ioctl interface for defining forwarding of connections
68 *
69 ********************************************************************/
70
71 #define PPPOEIOCSFWD _IOW(0xB1 ,0, sizeof(struct sockaddr_pppox))
72 #define PPPOEIOCDFWD _IO(0xB1 ,1)
73 /*#define PPPOEIOCGFWD _IOWR(0xB1,2, sizeof(struct sockaddr_pppox))*/
74
75 /* Codes to identify message types */
76 #define PADI_CODE 0x09
77 #define PADO_CODE 0x07
78 #define PADR_CODE 0x19
79 #define PADS_CODE 0x65
80 #define PADT_CODE 0xa7
81 struct pppoe_tag {
82 __u16 tag_type;
83 __u16 tag_len;
84 char tag_data[0];
85 } __attribute ((packed));
86
87 /* Tag identifiers */
88 #define PTT_EOL __constant_htons(0x0000)
89 #define PTT_SRV_NAME __constant_htons(0x0101)
90 #define PTT_AC_NAME __constant_htons(0x0102)
91 #define PTT_HOST_UNIQ __constant_htons(0x0103)
92 #define PTT_AC_COOKIE __constant_htons(0x0104)
93 #define PTT_VENDOR __constant_htons(0x0105)
94 #define PTT_RELAY_SID __constant_htons(0x0110)
95 #define PTT_SRV_ERR __constant_htons(0x0201)
96 #define PTT_SYS_ERR __constant_htons(0x0202)
97 #define PTT_GEN_ERR __constant_htons(0x0203)
98
99 struct pppoe_hdr {
100 __u8 ver : 4;
101 __u8 type : 4;
102 __u8 code;
103 __u16 sid;
104 __u16 length;
105 struct pppoe_tag tag[0];
106 } __attribute__ ((packed));
107
108 #ifdef __KERNEL__
109
110 struct pppox_proto {
111 int (*create)(struct socket *sock);
112 int (*ioctl)(struct socket *sock, unsigned int cmd,
113 unsigned long arg);
114 };
115
116 extern int register_pppox_proto(int proto_num, struct pppox_proto *pp);
117 extern void unregister_pppox_proto(int proto_num);
118 extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */
119 extern int pppox_channel_ioctl(struct ppp_channel *pc, unsigned int cmd,
120 unsigned long arg);
121
122 /* PPPoE socket states */
123 enum {
124 PPPOX_NONE = 0, /* initial state */
125 PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */
126 PPPOX_BOUND = 2, /* bound to ppp device */
127 PPPOX_RELAY = 4, /* forwarding is enabled */
128 PPPOX_DEAD = 8
129 };
130
131 extern struct ppp_channel_ops pppoe_chan_ops;
132
133 extern int pppox_proto_init(struct net_proto *np);
134
135 #endif /* __KERNEL__ */
136
137 #endif /* !(__LINUX_IF_PPPOX_H) */
138
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