Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 <asm/semaphore.h>
28#include <linux/ppp_channel.h>
29#endif /* __KERNEL__ */
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 */
42typedef __u16 sid_t;
43struct 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 */
53#define PX_MAX_PROTO 1
54
55struct sockaddr_pppox {
56 sa_family_t sa_family; /* address family, AF_PPPOX */
57 unsigned int sa_protocol; /* protocol identifier */
58 union{
59 struct pppoe_addr pppoe;
60 }sa_addr;
61}__attribute__ ((packed));
62
63
64/*********************************************************************
65 *
66 * ioctl interface for defining forwarding of connections
67 *
68 ********************************************************************/
69
70#define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t)
71#define PPPOEIOCDFWD _IO(0xB1 ,1)
72/*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/
73
74/* Codes to identify message types */
75#define PADI_CODE 0x09
76#define PADO_CODE 0x07
77#define PADR_CODE 0x19
78#define PADS_CODE 0x65
79#define PADT_CODE 0xa7
80struct pppoe_tag {
81 __u16 tag_type;
82 __u16 tag_len;
83 char tag_data[0];
84} __attribute ((packed));
85
86/* Tag identifiers */
87#define PTT_EOL __constant_htons(0x0000)
88#define PTT_SRV_NAME __constant_htons(0x0101)
89#define PTT_AC_NAME __constant_htons(0x0102)
90#define PTT_HOST_UNIQ __constant_htons(0x0103)
91#define PTT_AC_COOKIE __constant_htons(0x0104)
92#define PTT_VENDOR __constant_htons(0x0105)
93#define PTT_RELAY_SID __constant_htons(0x0110)
94#define PTT_SRV_ERR __constant_htons(0x0201)
95#define PTT_SYS_ERR __constant_htons(0x0202)
96#define PTT_GEN_ERR __constant_htons(0x0203)
97
98struct pppoe_hdr {
99#if defined(__LITTLE_ENDIAN_BITFIELD)
100 __u8 ver : 4;
101 __u8 type : 4;
102#elif defined(__BIG_ENDIAN_BITFIELD)
103 __u8 type : 4;
104 __u8 ver : 4;
105#else
106#error "Please fix <asm/byteorder.h>"
107#endif
108 __u8 code;
109 __u16 sid;
110 __u16 length;
111 struct pppoe_tag tag[0];
112} __attribute__ ((packed));
113
114#ifdef __KERNEL__
115struct pppoe_opt {
116 struct net_device *dev; /* device associated with socket*/
117 int ifindex; /* ifindex of device associated with socket */
118 struct pppoe_addr pa; /* what this socket is bound to*/
119 struct sockaddr_pppox relay; /* what socket data will be
120 relayed to (PPPoE relaying) */
121};
122
123#include <net/sock.h>
124
125struct pppox_sock {
126 /* struct sock must be the first member of pppox_sock */
127 struct sock sk;
128 struct ppp_channel chan;
129 struct pppox_sock *next; /* for hash table */
130 union {
131 struct pppoe_opt pppoe;
132 } proto;
133 unsigned short num;
134};
135#define pppoe_dev proto.pppoe.dev
136#define pppoe_ifindex proto.pppoe.ifindex
137#define pppoe_pa proto.pppoe.pa
138#define pppoe_relay proto.pppoe.relay
139
140static inline struct pppox_sock *pppox_sk(struct sock *sk)
141{
142 return (struct pppox_sock *)sk;
143}
144
145static inline struct sock *sk_pppox(struct pppox_sock *po)
146{
147 return (struct sock *)po;
148}
149
150struct module;
151
152struct pppox_proto {
153 int (*create)(struct socket *sock);
154 int (*ioctl)(struct socket *sock, unsigned int cmd,
155 unsigned long arg);
156 struct module *owner;
157};
158
159extern int register_pppox_proto(int proto_num, struct pppox_proto *pp);
160extern void unregister_pppox_proto(int proto_num);
161extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */
162extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
163
164/* PPPoX socket states */
165enum {
166 PPPOX_NONE = 0, /* initial state */
167 PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */
168 PPPOX_BOUND = 2, /* bound to ppp device */
169 PPPOX_RELAY = 4, /* forwarding is enabled */
170 PPPOX_ZOMBIE = 8, /* dead, but still bound to ppp device */
171 PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/
172};
173
174#endif /* __KERNEL__ */
175
176#endif /* !(__LINUX_IF_PPPOX_H) */