1/*
2 * Defines for synchronous PPP/Cisco link level subroutines.
3 *
4 * Copyright (C) 1994 Cronyx Ltd.
5 * Author: Serge Vakulenko, <vak@zebub.msk.su>
6 *
7 * This software is distributed with NO WARRANTIES, not even the implied
8 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
9 *
10 * Authors grant any other persons or organizations permission to use
11 * or modify this software as long as this message is kept with the software,
12 * all derivative works or modified versions.
13 *
14 * Version 1.7, Wed Jun  7 22:12:02 MSD 1995
15 *
16 *
17 *
18 */
19
20#ifndef _SYNCPPP_H_
21#define _SYNCPPP_H_ 1
22
23#ifdef __KERNEL__
24struct slcp {
25	u16	state;          /* state machine */
26	u32	magic;          /* local magic number */
27	u_char	echoid;         /* id of last keepalive echo request */
28	u_char	confid;         /* id of last configuration request */
29};
30
31struct sipcp {
32	u16	state;          /* state machine */
33	u_char  confid;         /* id of last configuration request */
34};
35
36struct sppp
37{
38	struct sppp *	pp_next;	/* next interface in keepalive list */
39	u32		pp_flags;	/* use Cisco protocol instead of PPP */
40	u16		pp_alivecnt;	/* keepalive packets counter */
41	u16		pp_loopcnt;	/* loopback detection counter */
42	u32		pp_seq;		/* local sequence number */
43	u32		pp_rseq;	/* remote sequence number */
44	struct slcp	lcp;		/* LCP params */
45	struct sipcp	ipcp;		/* IPCP params */
46	u32		ibytes,obytes;	/* Bytes in/out */
47	u32		ipkts,opkts;	/* Packets in/out */
48	struct timer_list	pp_timer;
49	struct net_device	*pp_if;
50	char		pp_link_state;	/* Link status */
51	spinlock_t      lock;
52};
53
54struct ppp_device
55{
56	struct net_device *dev;	/* Network device pointer */
57	struct sppp sppp;	/* Synchronous PPP */
58};
59
60static inline struct sppp *sppp_of(struct net_device *dev)
61{
62	struct ppp_device **ppp = dev->priv;
63	BUG_ON((*ppp)->dev != dev);
64	return &(*ppp)->sppp;
65}
66
67#define PP_KEEPALIVE    0x01    /* use keepalive protocol */
68#define PP_CISCO        0x02    /* use Cisco protocol instead of PPP */
69#define PP_TIMO         0x04    /* cp_timeout routine active */
70#define PP_DEBUG	0x08
71
72#define PPP_MTU          1500    /* max. transmit unit */
73
74#define LCP_STATE_CLOSED        0       /* LCP state: closed (conf-req sent) */
75#define LCP_STATE_ACK_RCVD      1       /* LCP state: conf-ack received */
76#define LCP_STATE_ACK_SENT      2       /* LCP state: conf-ack sent */
77#define LCP_STATE_OPENED        3       /* LCP state: opened */
78
79#define IPCP_STATE_CLOSED       0       /* IPCP state: closed (conf-req sent) */
80#define IPCP_STATE_ACK_RCVD     1       /* IPCP state: conf-ack received */
81#define IPCP_STATE_ACK_SENT     2       /* IPCP state: conf-ack sent */
82#define IPCP_STATE_OPENED       3       /* IPCP state: opened */
83
84#define SPPP_LINK_DOWN		0	/* link down - no keepalive */
85#define SPPP_LINK_UP		1	/* link is up - keepalive ok */
86
87void sppp_attach (struct ppp_device *pd);
88void sppp_detach (struct net_device *dev);
89int sppp_do_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
90struct sk_buff *sppp_dequeue (struct net_device *dev);
91int sppp_isempty (struct net_device *dev);
92void sppp_flush (struct net_device *dev);
93int sppp_open (struct net_device *dev);
94int sppp_reopen (struct net_device *dev);
95int sppp_close (struct net_device *dev);
96#endif
97
98#define SPPPIOCCISCO	(SIOCDEVPRIVATE)
99#define SPPPIOCPPP	(SIOCDEVPRIVATE+1)
100#define SPPPIOCDEBUG	(SIOCDEVPRIVATE+2)
101#define SPPPIOCSFLAGS	(SIOCDEVPRIVATE+3)
102#define SPPPIOCGFLAGS	(SIOCDEVPRIVATE+4)
103
104#endif /* _SYNCPPP_H_ */
105