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 <linux/types.h>
21#include <asm/byteorder.h>
22
23#include <linux/if_pppol2tp.h>
24
25/* For user-space programs to pick up these definitions
26 * which they wouldn't get otherwise without defining __KERNEL__
27 */
28#ifndef AF_PPPOX
29#define AF_PPPOX	24
30#define PF_PPPOX	AF_PPPOX
31#endif /* !(AF_PPPOX) */
32
33/************************************************************************
34 * PPPoE addressing definition
35 */
36typedef __be16 sid_t;
37struct pppoe_addr{
38       sid_t           sid;                    /* Session identifier */
39       unsigned char   remote[ETH_ALEN];       /* Remote address */
40       char            dev[IFNAMSIZ];          /* Local device to use */
41};
42
43/************************************************************************
44 * Protocols supported by AF_PPPOX
45 */
46#define PX_PROTO_OE    0 /* Currently just PPPoE */
47#define PX_PROTO_OL2TP 1 /* Now L2TP also */
48#define PX_MAX_PROTO   2
49
50struct sockaddr_pppox {
51       sa_family_t     sa_family;            /* address family, AF_PPPOX */
52       unsigned int    sa_protocol;          /* protocol identifier */
53       union{
54               struct pppoe_addr       pppoe;
55       }sa_addr;
56}__attribute__ ((packed));
57
58/* The use of the above union isn't viable because the size of this
59 * struct must stay fixed over time -- applications use sizeof(struct
60 * sockaddr_pppox) to fill it. We use a protocol specific sockaddr
61 * type instead.
62 */
63struct sockaddr_pppol2tp {
64	sa_family_t     sa_family;      /* address family, AF_PPPOX */
65	unsigned int    sa_protocol;    /* protocol identifier */
66	struct pppol2tp_addr pppol2tp;
67}__attribute__ ((packed));
68
69/*********************************************************************
70 *
71 * ioctl interface for defining forwarding of connections
72 *
73 ********************************************************************/
74
75#define PPPOEIOCSFWD	_IOW(0xB1 ,0, size_t)
76#define PPPOEIOCDFWD	_IO(0xB1 ,1)
77/*#define PPPOEIOCGFWD	_IOWR(0xB1,2, size_t)*/
78
79/* Codes to identify message types */
80#define PADI_CODE	0x09
81#define PADO_CODE	0x07
82#define PADR_CODE	0x19
83#define PADS_CODE	0x65
84#define PADT_CODE	0xa7
85struct pppoe_tag {
86	__be16 tag_type;
87	__be16 tag_len;
88	char tag_data[0];
89} __attribute ((packed));
90
91/* Tag identifiers */
92#define PTT_EOL		__cpu_to_be16(0x0000)
93#define PTT_SRV_NAME	__cpu_to_be16(0x0101)
94#define PTT_AC_NAME	__cpu_to_be16(0x0102)
95#define PTT_HOST_UNIQ	__cpu_to_be16(0x0103)
96#define PTT_AC_COOKIE	__cpu_to_be16(0x0104)
97#define PTT_VENDOR 	__cpu_to_be16(0x0105)
98#define PTT_RELAY_SID	__cpu_to_be16(0x0110)
99#define PTT_SRV_ERR     __cpu_to_be16(0x0201)
100#define PTT_SYS_ERR  	__cpu_to_be16(0x0202)
101#define PTT_GEN_ERR  	__cpu_to_be16(0x0203)
102
103struct pppoe_hdr {
104#if defined(__LITTLE_ENDIAN_BITFIELD)
105	__u8 ver : 4;
106	__u8 type : 4;
107#elif defined(__BIG_ENDIAN_BITFIELD)
108	__u8 type : 4;
109	__u8 ver : 4;
110#else
111#error	"Please fix <asm/byteorder.h>"
112#endif
113	__u8 code;
114	__be16 sid;
115	__be16 length;
116	struct pppoe_tag tag[0];
117} __attribute__ ((packed));
118
119/* Length of entire PPPoE + PPP header */
120#define PPPOE_SES_HLEN	8
121
122
123#endif /* !(__LINUX_IF_PPPOX_H) */
124