1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /*************************************************************************** |
3 | * Linux PPP over X - Generic PPP transport layer sockets |
4 | * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516) |
5 | * |
6 | * This file supplies definitions required by the PPP over Ethernet driver |
7 | * (pppox.c). All version information wrt this file is located in pppox.c |
8 | */ |
9 | #ifndef __LINUX_IF_PPPOX_H |
10 | #define __LINUX_IF_PPPOX_H |
11 | |
12 | #include <linux/if.h> |
13 | #include <linux/netdevice.h> |
14 | #include <linux/ppp_channel.h> |
15 | #include <linux/skbuff.h> |
16 | #include <linux/workqueue.h> |
17 | #include <uapi/linux/if_pppox.h> |
18 | |
19 | static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb) |
20 | { |
21 | return (struct pppoe_hdr *)skb_network_header(skb); |
22 | } |
23 | |
24 | struct pppoe_opt { |
25 | struct net_device *dev; /* device associated with socket*/ |
26 | int ifindex; /* ifindex of device associated with socket */ |
27 | struct pppoe_addr pa; /* what this socket is bound to*/ |
28 | struct sockaddr_pppox relay; /* what socket data will be |
29 | relayed to (PPPoE relaying) */ |
30 | struct work_struct padt_work;/* Work item for handling PADT */ |
31 | }; |
32 | |
33 | struct pptp_opt { |
34 | struct pptp_addr src_addr; |
35 | struct pptp_addr dst_addr; |
36 | u32 ack_sent, ack_recv; |
37 | u32 seq_sent, seq_recv; |
38 | int ppp_flags; |
39 | }; |
40 | #include <net/sock.h> |
41 | |
42 | struct pppox_sock { |
43 | /* struct sock must be the first member of pppox_sock */ |
44 | struct sock sk; |
45 | struct ppp_channel chan; |
46 | struct pppox_sock *next; /* for hash table */ |
47 | union { |
48 | struct pppoe_opt pppoe; |
49 | struct pptp_opt pptp; |
50 | } proto; |
51 | __be16 num; |
52 | }; |
53 | #define pppoe_dev proto.pppoe.dev |
54 | #define pppoe_ifindex proto.pppoe.ifindex |
55 | #define pppoe_pa proto.pppoe.pa |
56 | #define pppoe_relay proto.pppoe.relay |
57 | |
58 | static inline struct pppox_sock *pppox_sk(struct sock *sk) |
59 | { |
60 | return (struct pppox_sock *)sk; |
61 | } |
62 | |
63 | static inline struct sock *sk_pppox(struct pppox_sock *po) |
64 | { |
65 | return (struct sock *)po; |
66 | } |
67 | |
68 | struct module; |
69 | |
70 | struct pppox_proto { |
71 | int (*create)(struct net *net, struct socket *sock, int kern); |
72 | int (*ioctl)(struct socket *sock, unsigned int cmd, |
73 | unsigned long arg); |
74 | struct module *owner; |
75 | }; |
76 | |
77 | extern int register_pppox_proto(int proto_num, const struct pppox_proto *pp); |
78 | extern void unregister_pppox_proto(int proto_num); |
79 | extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */ |
80 | extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); |
81 | extern int pppox_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); |
82 | |
83 | #define PPPOEIOCSFWD32 _IOW(0xB1 ,0, compat_size_t) |
84 | |
85 | /* PPPoX socket states */ |
86 | enum { |
87 | PPPOX_NONE = 0, /* initial state */ |
88 | PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */ |
89 | PPPOX_BOUND = 2, /* bound to ppp device */ |
90 | PPPOX_RELAY = 4, /* forwarding is enabled */ |
91 | PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/ |
92 | }; |
93 | |
94 | #endif /* !(__LINUX_IF_PPPOX_H) */ |
95 | |