/*      $Id: if_ppp.h,v 1.21 2000/03/27 06:03:36 paulus Exp $   */

/*
 * if_ppp.h - Point-to-Point Protocol definitions.
 *
 * Copyright (c) 1989 Carnegie Mellon University.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by Carnegie Mellon University.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 */

/*
 *  ==FILEVERSION 20050812==
 *
 *  NOTE TO MAINTAINERS:
 *     If you modify this file at all, please set the above date.
 *     if_ppp.h is shipped with a PPP distribution as well as with the kernel;
 *     if everyone increases the FILEVERSION number above, then scripts
 *     can do the right thing when deciding whether to install a new if_ppp.h
 *     file.  Don't change the format of that line otherwise, so the
 *     installation script can recognize it.
 */

#ifndef _IF_PPP_H_
#define _IF_PPP_H_

#include <linux/compiler.h>

/*
 * Packet sizes
 */

#define PPP_MTU         1500    /* Default MTU (size of Info field) */
#define PPP_MAXMRU      65000   /* Largest MRU we allow */
#define PROTO_IPX       0x002b  /* protocol numbers */
#define PROTO_DNA_RT    0x0027  /* DNA Routing */


/*
 * Bit definitions for flags.
 */

#define SC_COMP_PROT    0x00000001      /* protocol compression (output) */
#define SC_COMP_AC      0x00000002      /* header compression (output) */
#define SC_COMP_TCP     0x00000004      /* TCP (VJ) compression (output) */
#define SC_NO_TCP_CCID  0x00000008      /* disable VJ connection-id comp. */
#define SC_REJ_COMP_AC  0x00000010      /* reject adrs/ctrl comp. on input */
#define SC_REJ_COMP_TCP 0x00000020      /* reject TCP (VJ) comp. on input */
#define SC_CCP_OPEN     0x00000040      /* Look at CCP packets */
#define SC_CCP_UP       0x00000080      /* May send/recv compressed packets */
#define SC_ENABLE_IP    0x00000100      /* IP packets may be exchanged */
#define SC_LOOP_TRAFFIC 0x00000200      /* send traffic to pppd */
#define SC_MULTILINK    0x00000400      /* do multilink encapsulation */
#define SC_MP_SHORTSEQ  0x00000800      /* use short MP sequence numbers */
#define SC_COMP_RUN     0x00001000      /* compressor has been inited */
#define SC_DECOMP_RUN   0x00002000      /* decompressor has been inited */
#define SC_MP_XSHORTSEQ 0x00004000      /* transmit short MP seq numbers */
#define SC_DEBUG        0x00010000      /* enable debug messages */
#define SC_LOG_INPKT    0x00020000      /* log contents of good pkts recvd */
#define SC_LOG_OUTPKT   0x00040000      /* log contents of pkts sent */
#define SC_LOG_RAWIN    0x00080000      /* log all chars received */
#define SC_LOG_FLUSH    0x00100000      /* log all chars flushed */
#define SC_SYNC         0x00200000      /* synchronous serial mode */
#define SC_MUST_COMP    0x00400000      /* no uncompressed packets may be sent or received */
#define SC_MASK         0x0f600fff      /* bits that user can change */

/* state bits */
#define SC_XMIT_BUSY    0x10000000      /* (used by isdn_ppp?) */
#define SC_RCV_ODDP     0x08000000      /* have rcvd char with odd parity */
#define SC_RCV_EVNP     0x04000000      /* have rcvd char with even parity */
#define SC_RCV_B7_1     0x02000000      /* have rcvd char with bit 7 = 1 */
#define SC_RCV_B7_0     0x01000000      /* have rcvd char with bit 7 = 0 */
#define SC_DC_FERROR    0x00800000      /* fatal decomp error detected */
#define SC_DC_ERROR     0x00400000      /* non-fatal decomp error detected */

/*
 * Ioctl definitions.
 */

struct npioctl {
        int             protocol;       /* PPP protocol, e.g. PPP_IP */
        enum NPmode     mode;
};

/* Structure describing a CCP configuration option, for PPPIOCSCOMPRESS */
struct ppp_option_data {
        __u8    __user *ptr;
        __u32   length;
        int     transmit;
};

struct ifpppstatsreq {
        struct ifreq     b;
        struct ppp_stats stats;                 /* statistic information */
};

struct ifpppcstatsreq {
        struct ifreq          b;
        struct ppp_comp_stats stats;
};

/* For PPPIOCGL2TPSTATS */
struct pppol2tp_ioc_stats {
        __u16           tunnel_id;      /* redundant */
        __u16           session_id;     /* if zero, get tunnel stats */
        __u32           using_ipsec:1;  /* valid only for session_id == 0 */
        aligned_u64     tx_packets;
        aligned_u64     tx_bytes;
        aligned_u64     tx_errors;
        aligned_u64     rx_packets;
        aligned_u64     rx_bytes;
        aligned_u64     rx_seq_discards;
        aligned_u64     rx_oos_packets;
        aligned_u64     rx_errors;
};

#define ifr__name       b.ifr_ifrn.ifrn_name
#define stats_ptr       b.ifr_ifru.ifru_data

/*
 * Ioctl definitions.
 */

#define PPPIOCGFLAGS    _IOR('t', 90, int)      /* get configuration flags */
#define PPPIOCSFLAGS    _IOW('t', 89, int)      /* set configuration flags */
#define PPPIOCGASYNCMAP _IOR('t', 88, int)      /* get async map */
#define PPPIOCSASYNCMAP _IOW('t', 87, int)      /* set async map */
#define PPPIOCGUNIT     _IOR('t', 86, int)      /* get ppp unit number */
#define PPPIOCGRASYNCMAP _IOR('t', 85, int)     /* get receive async map */
#define PPPIOCSRASYNCMAP _IOW('t', 84, int)     /* set receive async map */
#define PPPIOCGMRU      _IOR('t', 83, int)      /* get max receive unit */
#define PPPIOCSMRU      _IOW('t', 82, int)      /* set max receive unit */
#define PPPIOCSMAXCID   _IOW('t', 81, int)      /* set VJ max slot ID */
#define PPPIOCGXASYNCMAP _IOR('t', 80, ext_accm) /* get extended ACCM */
#define PPPIOCSXASYNCMAP _IOW('t', 79, ext_accm) /* set extended ACCM */
#define PPPIOCXFERUNIT  _IO('t', 78)            /* transfer PPP unit */
#define PPPIOCSCOMPRESS _IOW('t', 77, struct ppp_option_data)
#define PPPIOCGNPMODE   _IOWR('t', 76, struct npioctl) /* get NP mode */
#define PPPIOCSNPMODE   _IOW('t', 75, struct npioctl)  /* set NP mode */
#define PPPIOCSPASS     _IOW('t', 71, struct sock_fprog) /* set pass filter */
#define PPPIOCSACTIVE   _IOW('t', 70, struct sock_fprog) /* set active filt */
#define PPPIOCGDEBUG    _IOR('t', 65, int)      /* Read debug level */
#define PPPIOCSDEBUG    _IOW('t', 64, int)      /* Set debug level */
#define PPPIOCGIDLE     _IOR('t', 63, struct ppp_idle) /* get idle time */
#define PPPIOCNEWUNIT   _IOWR('t', 62, int)     /* create new ppp unit */
#define PPPIOCATTACH    _IOW('t', 61, int)      /* attach to ppp unit */
#define PPPIOCDETACH    _IOW('t', 60, int)      /* detach from ppp unit/chan */
#define PPPIOCSMRRU     _IOW('t', 59, int)      /* set multilink MRU */
#define PPPIOCCONNECT   _IOW('t', 58, int)      /* connect channel to unit */
#define PPPIOCDISCONN   _IO('t', 57)            /* disconnect channel */
#define PPPIOCATTCHAN   _IOW('t', 56, int)      /* attach to ppp channel */
#define PPPIOCGCHAN     _IOR('t', 55, int)      /* get ppp channel number */
#define PPPIOCGL2TPSTATS _IOR('t', 54, struct pppol2tp_ioc_stats)

#define SIOCGPPPSTATS   (SIOCDEVPRIVATE + 0)
#define SIOCGPPPVER     (SIOCDEVPRIVATE + 1)    /* NEVER change this!! */
#define SIOCGPPPCSTATS  (SIOCDEVPRIVATE + 2)

#if !defined(ifr_mtu)
#define ifr_mtu ifr_ifru.ifru_metric
#endif

#endif /* _IF_PPP_H_ */