include/net/syncppp.h

   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__
  24 struct 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
  31 struct sipcp {
  32         u16     state;          /* state machine */
  33         u_char  confid;         /* id of last configuration request */
  34 };
  35
  36 struct 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
  52 struct ppp_device
  53 {
  54         struct net_device *dev; /* Network device pointer */
  55         struct sppp sppp;       /* Synchronous PPP */
  56 };
  57
  58 static 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
  85 void sppp_attach (struct ppp_device *pd);
  86 void sppp_detach (struct net_device *dev);
  87 int sppp_do_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
  88 struct sk_buff *sppp_dequeue (struct net_device *dev);
  89 int sppp_isempty (struct net_device *dev);
  90 void sppp_flush (struct net_device *dev);
  91 int sppp_open (struct net_device *dev);
  92 int sppp_reopen (struct net_device *dev);
  93 int 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_ */