# isdn_net.h

    /* $Id$

     * header for Linux ISDN subsystem, network related functions (linklevel).
     *
     * Copyright 1994,95,96 by Fritz Elfert (fritz@wuemaus.franken.de)
     * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg
     * Copyright 1995,96    by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
     *
     * This program is free software; you can redistribute it and/or modify
     * it under the terms of the GNU General Public License as published by
     * the Free Software Foundation; either version 2, or (at your option)
     * any later version.
     *
     * This program is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU General Public License for more details.
     *
     * You should have received a copy of the GNU General Public License
     * along with this program; if not, write to the Free Software
     * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
     *
     * $Log$
     * Revision 1.6  1997/10/09 21:28:54  fritz
     * New HL<->LL interface:
     *   New BSENT callback with nr. of bytes included.
     *   Sending without ACK.
     *   New L1 error status (not yet in use).
     *   Cleaned up obsolete structures.
     * Implemented Cisco-SLARP.
     * Changed local net-interface data to be dynamically allocated.
     * Removed old 2.0 compatibility stuff.
     *
     * Revision 1.5  1997/02/10 20:12:47  fritz
     * Changed interface for reporting incoming calls.
     *
     * Revision 1.4  1997/02/03 23:16:48  fritz
     * Removed isdn_net_receive_callback prototype.
     *
     * Revision 1.3  1997/01/17 01:19:30  fritz
     * Applied chargeint patch.
     *
     * Revision 1.2  1996/04/20 16:29:43  fritz
     * Misc. typos
     *
     * Revision 1.1  1996/02/11 02:35:13  fritz
     * Initial revision
     *
     */

    			      /* Definitions for hupflags:                */
    #define ISDN_WAITCHARGE  1      /* did not get a charge info yet            */
    #define ISDN_HAVECHARGE  2      /* We know a charge info                    */
    #define ISDN_CHARGEHUP   4      /* We want to use the charge mechanism      */
    #define ISDN_INHUP       8      /* Even if incoming, close after huptimeout */
    #define ISDN_MANCHARGE  16      /* Charge Interval manually set             */

    /*
     * Definitions for Cisco-HDLC header.
     */

    typedef struct cisco_hdr {
    	__u8  addr; /* unicast/broadcast */
    	__u8  ctrl; /* Always 0          */
    	__u16 type; /* IP-typefield      */
    } cisco_hdr;

    typedef struct cisco_slarp {
    	__u32 code;                     /* SLREQ/SLREPLY/KEEPALIVE */
    	union {
    		struct {
    			__u32 ifaddr;   /* My interface address     */
    			__u32 netmask;  /* My interface netmask     */
    		} reply;
    		struct {
    			__u32 my_seq;   /* Packet sequence number   */
    			__u32 your_seq;
    		} keepalive;
    	} slarp;
    	__u16 rel;                      /* Always 0xffff            */
    	__u16 t1;                       /* Uptime in usec >> 16     */
    	__u16 t0;                       /* Uptime in usec & 0xffff  */
    } cisco_slarp;

    #define CISCO_ADDR_UNICAST    0x0f
    #define CISCO_ADDR_BROADCAST  0x8f
    #define CISCO_TYPE_INET       0x0800
    #define CISCO_TYPE_SLARP      0x8035
    #define CISCO_SLARP_REPLY     0
    #define CISCO_SLARP_REQUEST   1
    #define CISCO_SLARP_KEEPALIVE 2

    extern char *isdn_net_new(char *, struct device *);
    extern char *isdn_net_newslave(char *);
    extern int isdn_net_rm(char *);
    extern int isdn_net_rmall(void);
    extern int isdn_net_stat_callback(int, isdn_ctrl *);
    extern int isdn_net_setcfg(isdn_net_ioctl_cfg *);
    extern int isdn_net_getcfg(isdn_net_ioctl_cfg *);
    extern int isdn_net_addphone(isdn_net_ioctl_phone *);
    extern int isdn_net_getphones(isdn_net_ioctl_phone *, char *);
    extern int isdn_net_delphone(isdn_net_ioctl_phone *);
    extern int isdn_net_find_icall(int, int, int, setup_parm);
    extern void isdn_net_hangup(struct device *);
    extern void isdn_net_dial(void);
    extern void isdn_net_autohup(void);
    extern int isdn_net_force_hangup(char *);
    extern int isdn_net_force_dial(char *);
    extern isdn_net_dev *isdn_net_findif(char *);
    extern int isdn_net_send_skb(struct device *, isdn_net_local *,
    			     struct sk_buff *);
    extern int isdn_net_rcv_skb(int, struct sk_buff *);
    extern void isdn_net_slarp_out(void);