1 /***************************************************************************
2 * Linux PPP over X - Generic PPP transport layer sockets
3 * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516)
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
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.
16 #ifndef __LINUX_IF_PPPOX_H
17 #define __LINUX_IF_PPPOX_H
20 #include <linux/types.h>
21 #include <asm/byteorder.h>
24 #include <linux/if_ether.h>
26 #include <linux/netdevice.h>
27 #include <linux/ppp_channel.h>
28 #endif /* __KERNEL__ */
29 #include <linux/if_pppol2tp.h>
30 #include <linux/if_pppolac.h>
31 #include <linux/if_pppopns.h>
33 /* For user-space programs to pick up these definitions
34 * which they wouldn't get otherwise without defining __KERNEL__
38 #define PF_PPPOX AF_PPPOX
39 #endif /* !(AF_PPPOX) */
41 /************************************************************************
42 * PPPoE addressing definition
46 sid_t sid; /* Session identifier */
47 unsigned char remote[ETH_ALEN]; /* Remote address */
48 char dev[IFNAMSIZ]; /* Local device to use */
51 /************************************************************************
52 * Protocols supported by AF_PPPOX
54 #define PX_PROTO_OE 0 /* Currently just PPPoE */
55 #define PX_PROTO_OL2TP 1 /* Now L2TP also */
56 #define PX_PROTO_OLAC 2
57 #define PX_PROTO_OPNS 3
58 #define PX_MAX_PROTO 4
60 struct sockaddr_pppox {
61 sa_family_t sa_family; /* address family, AF_PPPOX */
62 unsigned int sa_protocol; /* protocol identifier */
64 struct pppoe_addr pppoe;
66 } __attribute__((packed));
68 /* The use of the above union isn't viable because the size of this
69 * struct must stay fixed over time -- applications use sizeof(struct
70 * sockaddr_pppox) to fill it. We use a protocol specific sockaddr
73 struct sockaddr_pppol2tp {
74 sa_family_t sa_family; /* address family, AF_PPPOX */
75 unsigned int sa_protocol; /* protocol identifier */
76 struct pppol2tp_addr pppol2tp;
77 } __attribute__((packed));
79 /* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
80 * bits. So we need a different sockaddr structure.
82 struct sockaddr_pppol2tpv3 {
83 sa_family_t sa_family; /* address family, AF_PPPOX */
84 unsigned int sa_protocol; /* protocol identifier */
85 struct pppol2tpv3_addr pppol2tp;
86 } __attribute__((packed));
88 /*********************************************************************
90 * ioctl interface for defining forwarding of connections
92 ********************************************************************/
94 #define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t)
95 #define PPPOEIOCDFWD _IO(0xB1 ,1)
96 /*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/
98 /* Codes to identify message types */
99 #define PADI_CODE 0x09
100 #define PADO_CODE 0x07
101 #define PADR_CODE 0x19
102 #define PADS_CODE 0x65
103 #define PADT_CODE 0xa7
108 } __attribute__ ((packed));
110 /* Tag identifiers */
111 #define PTT_EOL __cpu_to_be16(0x0000)
112 #define PTT_SRV_NAME __cpu_to_be16(0x0101)
113 #define PTT_AC_NAME __cpu_to_be16(0x0102)
114 #define PTT_HOST_UNIQ __cpu_to_be16(0x0103)
115 #define PTT_AC_COOKIE __cpu_to_be16(0x0104)
116 #define PTT_VENDOR __cpu_to_be16(0x0105)
117 #define PTT_RELAY_SID __cpu_to_be16(0x0110)
118 #define PTT_SRV_ERR __cpu_to_be16(0x0201)
119 #define PTT_SYS_ERR __cpu_to_be16(0x0202)
120 #define PTT_GEN_ERR __cpu_to_be16(0x0203)
123 #if defined(__LITTLE_ENDIAN_BITFIELD)
126 #elif defined(__BIG_ENDIAN_BITFIELD)
130 #error "Please fix <asm/byteorder.h>"
135 struct pppoe_tag tag[0];
136 } __attribute__((packed));
138 /* Length of entire PPPoE + PPP header */
139 #define PPPOE_SES_HLEN 8
142 #include <linux/skbuff.h>
144 static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb)
146 return (struct pppoe_hdr *)skb_network_header(skb);
150 struct net_device *dev; /* device associated with socket*/
151 int ifindex; /* ifindex of device associated with socket */
152 struct pppoe_addr pa; /* what this socket is bound to*/
153 struct sockaddr_pppox relay; /* what socket data will be
154 relayed to (PPPoE relaying) */
162 int (*backlog_rcv)(struct sock *sk_udp, struct sk_buff *skb);
169 void (*data_ready)(struct sock *sk_raw, int length);
170 int (*backlog_rcv)(struct sock *sk_raw, struct sk_buff *skb);
173 #include <net/sock.h>
176 /* struct sock must be the first member of pppox_sock */
178 struct ppp_channel chan;
179 struct pppox_sock *next; /* for hash table */
181 struct pppoe_opt pppoe;
182 struct pppolac_opt lac;
183 struct pppopns_opt pns;
187 #define pppoe_dev proto.pppoe.dev
188 #define pppoe_ifindex proto.pppoe.ifindex
189 #define pppoe_pa proto.pppoe.pa
190 #define pppoe_relay proto.pppoe.relay
192 static inline struct pppox_sock *pppox_sk(struct sock *sk)
194 return (struct pppox_sock *)sk;
197 static inline struct sock *sk_pppox(struct pppox_sock *po)
199 return (struct sock *)po;
205 int (*create)(struct net *net, struct socket *sock);
206 int (*ioctl)(struct socket *sock, unsigned int cmd,
208 struct module *owner;
211 extern int register_pppox_proto(int proto_num, struct pppox_proto *pp);
212 extern void unregister_pppox_proto(int proto_num);
213 extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */
214 extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
216 /* PPPoX socket states */
218 PPPOX_NONE = 0, /* initial state */
219 PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */
220 PPPOX_BOUND = 2, /* bound to ppp device */
221 PPPOX_RELAY = 4, /* forwarding is enabled */
222 PPPOX_ZOMBIE = 8, /* dead, but still bound to ppp device */
223 PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/
226 #endif /* __KERNEL__ */
228 #endif /* !(__LINUX_IF_PPPOX_H) */