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
47 struct pppolac_opt {
48 __u32 local;
49 __u32 remote;
50 __u32 recv_sequence;
51 __u32 xmit_sequence;
52 atomic_t sequencing;
53 int (*backlog_rcv)(struct sock *sk_udp, struct sk_buff *skb);
54 };
55
56 struct pppopns_opt {
57 __u16 local;
58 __u16 remote;
59 __u32 recv_sequence;
60 __u32 xmit_sequence;
61 void (*data_ready)(struct sock *sk_raw);
62 int (*backlog_rcv)(struct sock *sk_raw, struct sk_buff *skb);
63 };
64
65 #include <net/sock.h>
66
67 struct pppox_sock {
68 /* struct sock must be the first member of pppox_sock */
69 struct sock sk;
70 struct ppp_channel chan;
71 struct pppox_sock *next; /* for hash table */
72 union {
73 struct pppoe_opt pppoe;
74 struct pptp_opt pptp;
75 struct pppolac_opt lac;
76 struct pppopns_opt pns;
77 } proto;
78 __be16 num;
79 };
80 #define pppoe_dev proto.pppoe.dev
81 #define pppoe_ifindex proto.pppoe.ifindex
82 #define pppoe_pa proto.pppoe.pa
83 #define pppoe_relay proto.pppoe.relay
84
pppox_sk(struct sock * sk)85 static inline struct pppox_sock *pppox_sk(struct sock *sk)
86 {
87 return (struct pppox_sock *)sk;
88 }
89
sk_pppox(struct pppox_sock * po)90 static inline struct sock *sk_pppox(struct pppox_sock *po)
91 {
92 return (struct sock *)po;
93 }
94
95 struct module;
96
97 struct pppox_proto {
98 int (*create)(struct net *net, struct socket *sock, int kern);
99 int (*ioctl)(struct socket *sock, unsigned int cmd,
100 unsigned long arg);
101 struct module *owner;
102 };
103
104 extern int register_pppox_proto(int proto_num, const struct pppox_proto *pp);
105 extern void unregister_pppox_proto(int proto_num);
106 extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */
107 extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
108
109 /* PPPoX socket states */
110 enum {
111 PPPOX_NONE = 0, /* initial state */
112 PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */
113 PPPOX_BOUND = 2, /* bound to ppp device */
114 PPPOX_RELAY = 4, /* forwarding is enabled */
115 PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/
116 };
117
118 #endif /* !(__LINUX_IF_PPPOX_H) */
119