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 #ifndef __LINUX_IF_PPPOX_H
16 #define __LINUX_IF_PPPOX_H
17
18 #include <linux/if.h>
19 #include <linux/netdevice.h>
20 #include <linux/ppp_channel.h>
21 #include <linux/skbuff.h>
22 #include <linux/workqueue.h>
23 #include <uapi/linux/if_pppox.h>
24
pppoe_hdr(const struct sk_buff * skb)25 static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb)
26 {
27 return (struct pppoe_hdr *)skb_network_header(skb);
28 }
29
30 struct pppoe_opt {
31 struct net_device *dev; /* device associated with socket*/
32 int ifindex; /* ifindex of device associated with socket */
33 struct pppoe_addr pa; /* what this socket is bound to*/
34 struct sockaddr_pppox relay; /* what socket data will be
35 relayed to (PPPoE relaying) */
36 struct work_struct padt_work;/* Work item for handling PADT */
37 };
38
39 struct pptp_opt {
40 struct pptp_addr src_addr;
41 struct pptp_addr dst_addr;
42 u32 ack_sent, ack_recv;
43 u32 seq_sent, seq_recv;
44 int ppp_flags;
45 };
46 #include <net/sock.h>
47
48 struct pppox_sock {
49 /* struct sock must be the first member of pppox_sock */
50 struct sock sk;
51 struct ppp_channel chan;
52 struct pppox_sock *next; /* for hash table */
53 union {
54 struct pppoe_opt pppoe;
55 struct pptp_opt pptp;
56 } proto;
57 __be16 num;
58 };
59 #define pppoe_dev proto.pppoe.dev
60 #define pppoe_ifindex proto.pppoe.ifindex
61 #define pppoe_pa proto.pppoe.pa
62 #define pppoe_relay proto.pppoe.relay
63
pppox_sk(struct sock * sk)64 static inline struct pppox_sock *pppox_sk(struct sock *sk)
65 {
66 return (struct pppox_sock *)sk;
67 }
68
sk_pppox(struct pppox_sock * po)69 static inline struct sock *sk_pppox(struct pppox_sock *po)
70 {
71 return (struct sock *)po;
72 }
73
74 struct module;
75
76 struct pppox_proto {
77 int (*create)(struct net *net, struct socket *sock, int kern);
78 int (*ioctl)(struct socket *sock, unsigned int cmd,
79 unsigned long arg);
80 struct module *owner;
81 };
82
83 extern int register_pppox_proto(int proto_num, const struct pppox_proto *pp);
84 extern void unregister_pppox_proto(int proto_num);
85 extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */
86 extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
87
88 /* PPPoX socket states */
89 enum {
90 PPPOX_NONE = 0, /* initial state */
91 PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */
92 PPPOX_BOUND = 2, /* bound to ppp device */
93 PPPOX_RELAY = 4, /* forwarding is enabled */
94 PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/
95 };
96
97 #endif /* !(__LINUX_IF_PPPOX_H) */
98
