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/include/linux/if_pppox.h

https://gitlab.com/simplified-mandatory-access-control-kernel/ossecus-simplified-mandatory-access-control-kernel
C Header | 224 lines | 148 code | 30 blank | 46 comment | 0 complexity | 00c0f36f18a6727c61d5baa5fdce98b4 MD5 | raw file
  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
 16#ifndef __LINUX_IF_PPPOX_H
 17#define __LINUX_IF_PPPOX_H
 18
 19
 20#include <linux/types.h>
 21#include <asm/byteorder.h>
 22
 23#ifdef  __KERNEL__
 24#include <linux/if_ether.h>
 25#include <linux/if.h>
 26#include <linux/netdevice.h>
 27#include <linux/ppp_channel.h>
 28#endif /* __KERNEL__ */
 29#include <linux/if_pppol2tp.h>
 30
 31/* For user-space programs to pick up these definitions
 32 * which they wouldn't get otherwise without defining __KERNEL__
 33 */
 34#ifndef AF_PPPOX
 35#define AF_PPPOX	24
 36#define PF_PPPOX	AF_PPPOX
 37#endif /* !(AF_PPPOX) */
 38
 39/************************************************************************ 
 40 * PPPoE addressing definition 
 41 */ 
 42typedef __be16 sid_t;
 43struct pppoe_addr {
 44	sid_t         sid;                    /* Session identifier */
 45	unsigned char remote[ETH_ALEN];       /* Remote address */
 46	char          dev[IFNAMSIZ];          /* Local device to use */
 47}; 
 48 
 49/************************************************************************ 
 50 * PPTP addressing definition
 51 */
 52struct pptp_addr {
 53	__be16		call_id;
 54	struct in_addr	sin_addr;
 55};
 56
 57/************************************************************************
 58 * Protocols supported by AF_PPPOX
 59 */
 60#define PX_PROTO_OE    0 /* Currently just PPPoE */
 61#define PX_PROTO_OL2TP 1 /* Now L2TP also */
 62#define PX_PROTO_PPTP  2
 63#define PX_MAX_PROTO   3
 64
 65struct sockaddr_pppox {
 66	sa_family_t     sa_family;            /* address family, AF_PPPOX */
 67	unsigned int    sa_protocol;          /* protocol identifier */
 68	union {
 69		struct pppoe_addr  pppoe;
 70		struct pptp_addr   pptp;
 71	} sa_addr;
 72} __attribute__((packed));
 73
 74/* The use of the above union isn't viable because the size of this
 75 * struct must stay fixed over time -- applications use sizeof(struct
 76 * sockaddr_pppox) to fill it. We use a protocol specific sockaddr
 77 * type instead.
 78 */
 79struct sockaddr_pppol2tp {
 80	sa_family_t     sa_family;      /* address family, AF_PPPOX */
 81	unsigned int    sa_protocol;    /* protocol identifier */
 82	struct pppol2tp_addr pppol2tp;
 83} __attribute__((packed));
 84
 85/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
 86 * bits. So we need a different sockaddr structure.
 87 */
 88struct sockaddr_pppol2tpv3 {
 89	sa_family_t     sa_family;      /* address family, AF_PPPOX */
 90	unsigned int    sa_protocol;    /* protocol identifier */
 91	struct pppol2tpv3_addr pppol2tp;
 92} __attribute__((packed));
 93
 94/*********************************************************************
 95 *
 96 * ioctl interface for defining forwarding of connections
 97 *
 98 ********************************************************************/
 99
100#define PPPOEIOCSFWD	_IOW(0xB1 ,0, size_t)
101#define PPPOEIOCDFWD	_IO(0xB1 ,1)
102/*#define PPPOEIOCGFWD	_IOWR(0xB1,2, size_t)*/
103
104/* Codes to identify message types */
105#define PADI_CODE	0x09
106#define PADO_CODE	0x07
107#define PADR_CODE	0x19
108#define PADS_CODE	0x65
109#define PADT_CODE	0xa7
110struct pppoe_tag {
111	__be16 tag_type;
112	__be16 tag_len;
113	char tag_data[0];
114} __attribute__ ((packed));
115
116/* Tag identifiers */
117#define PTT_EOL		__cpu_to_be16(0x0000)
118#define PTT_SRV_NAME	__cpu_to_be16(0x0101)
119#define PTT_AC_NAME	__cpu_to_be16(0x0102)
120#define PTT_HOST_UNIQ	__cpu_to_be16(0x0103)
121#define PTT_AC_COOKIE	__cpu_to_be16(0x0104)
122#define PTT_VENDOR 	__cpu_to_be16(0x0105)
123#define PTT_RELAY_SID	__cpu_to_be16(0x0110)
124#define PTT_SRV_ERR     __cpu_to_be16(0x0201)
125#define PTT_SYS_ERR  	__cpu_to_be16(0x0202)
126#define PTT_GEN_ERR  	__cpu_to_be16(0x0203)
127
128struct pppoe_hdr {
129#if defined(__LITTLE_ENDIAN_BITFIELD)
130	__u8 ver : 4;
131	__u8 type : 4;
132#elif defined(__BIG_ENDIAN_BITFIELD)
133	__u8 type : 4;
134	__u8 ver : 4;
135#else
136#error	"Please fix <asm/byteorder.h>"
137#endif
138	__u8 code;
139	__be16 sid;
140	__be16 length;
141	struct pppoe_tag tag[0];
142} __attribute__((packed));
143
144/* Length of entire PPPoE + PPP header */
145#define PPPOE_SES_HLEN	8
146
147#ifdef __KERNEL__
148#include <linux/skbuff.h>
149
150static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb)
151{
152	return (struct pppoe_hdr *)skb_network_header(skb);
153}
154
155struct pppoe_opt {
156	struct net_device      *dev;	  /* device associated with socket*/
157	int			ifindex;  /* ifindex of device associated with socket */
158	struct pppoe_addr	pa;	  /* what this socket is bound to*/
159	struct sockaddr_pppox	relay;	  /* what socket data will be
160					     relayed to (PPPoE relaying) */
161};
162
163struct pptp_opt {
164	struct pptp_addr src_addr;
165	struct pptp_addr dst_addr;
166	u32 ack_sent, ack_recv;
167	u32 seq_sent, seq_recv;
168	int ppp_flags;
169};
170#include <net/sock.h>
171
172struct pppox_sock {
173	/* struct sock must be the first member of pppox_sock */
174	struct sock sk;
175	struct ppp_channel chan;
176	struct pppox_sock	*next;	  /* for hash table */
177	union {
178		struct pppoe_opt pppoe;
179		struct pptp_opt  pptp;
180	} proto;
181	__be16			num;
182};
183#define pppoe_dev	proto.pppoe.dev
184#define pppoe_ifindex	proto.pppoe.ifindex
185#define pppoe_pa	proto.pppoe.pa
186#define pppoe_relay	proto.pppoe.relay
187
188static inline struct pppox_sock *pppox_sk(struct sock *sk)
189{
190	return (struct pppox_sock *)sk;
191}
192
193static inline struct sock *sk_pppox(struct pppox_sock *po)
194{
195	return (struct sock *)po;
196}
197
198struct module;
199
200struct pppox_proto {
201	int		(*create)(struct net *net, struct socket *sock);
202	int		(*ioctl)(struct socket *sock, unsigned int cmd,
203				 unsigned long arg);
204	struct module	*owner;
205};
206
207extern int register_pppox_proto(int proto_num, const struct pppox_proto *pp);
208extern void unregister_pppox_proto(int proto_num);
209extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */
210extern int pppox_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
211
212/* PPPoX socket states */
213enum {
214    PPPOX_NONE		= 0,  /* initial state */
215    PPPOX_CONNECTED	= 1,  /* connection established ==TCP_ESTABLISHED */
216    PPPOX_BOUND		= 2,  /* bound to ppp device */
217    PPPOX_RELAY		= 4,  /* forwarding is enabled */
218    PPPOX_ZOMBIE	= 8,  /* dead, but still bound to ppp device */
219    PPPOX_DEAD		= 16  /* dead, useless, please clean me up!*/
220};
221
222#endif /* __KERNEL__ */
223
224#endif /* !(__LINUX_IF_PPPOX_H) */