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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 struct timer_list pp_timer;
47 struct net_device *pp_if;
48 char pp_link_state; /* Link status */
49 spinlock_t lock;
50};
51
52struct ppp_device
53{
54 struct net_device *dev; /* Network device pointer */
55 struct sppp sppp; /* Synchronous PPP */
56};
57
58static inline struct sppp *sppp_of(struct net_device *dev)
59{
60 struct ppp_device **ppp = dev->ml_priv;
61 BUG_ON((*ppp)->dev != dev);
62 return &(*ppp)->sppp;
63}
64
65#define PP_KEEPALIVE 0x01 /* use keepalive protocol */
66#define PP_CISCO 0x02 /* use Cisco protocol instead of PPP */
67#define PP_TIMO 0x04 /* cp_timeout routine active */
68#define PP_DEBUG 0x08
69
70#define PPP_MTU 1500 /* max. transmit unit */
71
72#define LCP_STATE_CLOSED 0 /* LCP state: closed (conf-req sent) */
73#define LCP_STATE_ACK_RCVD 1 /* LCP state: conf-ack received */
74#define LCP_STATE_ACK_SENT 2 /* LCP state: conf-ack sent */
75#define LCP_STATE_OPENED 3 /* LCP state: opened */
76
77#define IPCP_STATE_CLOSED 0 /* IPCP state: closed (conf-req sent) */
78#define IPCP_STATE_ACK_RCVD 1 /* IPCP state: conf-ack received */
79#define IPCP_STATE_ACK_SENT 2 /* IPCP state: conf-ack sent */
80#define IPCP_STATE_OPENED 3 /* IPCP state: opened */
81
82#define SPPP_LINK_DOWN 0 /* link down - no keepalive */
83#define SPPP_LINK_UP 1 /* link is up - keepalive ok */
84
85void sppp_attach (struct ppp_device *pd);
86void sppp_detach (struct net_device *dev);
87int sppp_do_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
88struct sk_buff *sppp_dequeue (struct net_device *dev);
89int sppp_isempty (struct net_device *dev);
90void sppp_flush (struct net_device *dev);
91int sppp_open (struct net_device *dev);
92int sppp_reopen (struct net_device *dev);
93int sppp_close (struct net_device *dev);
94#endif
95
96#define SPPPIOCCISCO (SIOCDEVPRIVATE)
97#define SPPPIOCPPP (SIOCDEVPRIVATE+1)
98#define SPPPIOCDEBUG (SIOCDEVPRIVATE+2)
99#define SPPPIOCSFLAGS (SIOCDEVPRIVATE+3)
100#define SPPPIOCGFLAGS (SIOCDEVPRIVATE+4)
101
102#endif /* _SYNCPPP_H_ */