xref: /linux/include/linux/if_pppox.h (revision 4f2c0a4acffbec01079c28f839422e64ddeff004)
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 
pppoe_hdr(const struct sk_buff * skb)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 
pppox_sk(struct sock * sk)58 static inline struct pppox_sock *pppox_sk(struct sock *sk)
59 {
60 	return (struct pppox_sock *)sk;
61 }
62 
sk_pppox(struct pppox_sock * po)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