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Annotation of kernel/bsd/net/if_ppp.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
        !            26: /*
        !            27:  * if_ppp.h - Point-to-Point Protocol definitions.
        !            28:  *
        !            29:  * Copyright (c) 1989 Carnegie Mellon University.
        !            30:  * All rights reserved.
        !            31:  *
        !            32:  * Redistribution and use in source and binary forms are permitted
        !            33:  * provided that the above copyright notice and this paragraph are
        !            34:  * duplicated in all such forms and that any documentation,
        !            35:  * advertising materials, and other materials related to such
        !            36:  * distribution and use acknowledge that the software was developed
        !            37:  * by Carnegie Mellon University.  The name of the
        !            38:  * University may not be used to endorse or promote products derived
        !            39:  * from this software without specific prior written permission.
        !            40:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            41:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            42:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            43:  */
        !            44: 
        !            45: #ifndef _IF_PPP_H_
        !            46: #define _IF_PPP_H_
        !            47: 
        !            48: /*
        !            49:  * Standard PPP header.
        !            50:  */
        !            51: struct ppp_header {
        !            52:        u_int8_t        ph_address;     /* Address Field */
        !            53:        u_int8_t        ph_control;     /* Control Field */
        !            54:        u_int16_t       ph_protocol;    /* Protocol Field */
        !            55: };
        !            56: 
        !            57: #define PPP_HDRLEN     4       /* sizeof(struct ppp_header) must be 4 */
        !            58: #define PPP_FCSLEN     2       /* octets for FCS */
        !            59: 
        !            60: #define        PPP_ALLSTATIONS 0xff    /* All-Stations broadcast address */
        !            61: #define        PPP_UI          0x03    /* Unnumbered Information */
        !            62: #define        PPP_FLAG        0x7e    /* Flag Sequence */
        !            63: #define        PPP_ESCAPE      0x7d    /* Asynchronous Control Escape */
        !            64: #define        PPP_TRANS       0x20    /* Asynchronous transparency modifier */
        !            65: 
        !            66: /*
        !            67:  * Protocol field values.
        !            68:  */
        !            69: #define PPP_IP         0x21    /* Internet Protocol */
        !            70: #define        PPP_XNS         0x25    /* Xerox NS */
        !            71: #define        PPP_VJC_COMP    0x2d    /* VJ compressed TCP */
        !            72: #define        PPP_VJC_UNCOMP  0x2f    /* VJ uncompressed TCP */
        !            73: #define PPP_COMP       0xfd    /* compressed packet */
        !            74: #define PPP_LCP                0xc021  /* Link Control Protocol */
        !            75: #define PPP_CCP                0x80fd  /* Compression Control Protocol */
        !            76: 
        !            77: /*
        !            78:  * Important FCS values.
        !            79:  */
        !            80: #define PPP_INITFCS    0xffff  /* Initial FCS value */
        !            81: #define PPP_GOODFCS    0xf0b8  /* Good final FCS value */
        !            82: #define PPP_FCS(fcs, c)        (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
        !            83: 
        !            84: /*
        !            85:  * Packet sizes
        !            86:  */
        !            87: #define        PPP_MTU         1500    /* Default MTU (size of Info field) */
        !            88: #define PPP_MRU                1500    /* Default MRU (max receive unit) */
        !            89: #define PPP_MAXMRU     65000   /* Largest MRU we allow */
        !            90: 
        !            91: /* Extended asyncmap - allows any character to be escaped. */
        !            92: typedef u_int32_t ext_accm[8];
        !            93: 
        !            94: /*
        !            95:  * Structure describing each ppp unit.
        !            96:  */
        !            97: struct ppp_softc {
        !            98:        struct ifnet sc_if;     /* network-visible interface */
        !            99:        u_int   sc_flags;       /* see below */
        !           100:        void    *sc_devp;       /* pointer to device-dependent structure */
        !           101:        int     (*sc_start) __P((struct ppp_softc *));  /* start routine */
        !           102:        short   sc_mru;         /* max receive unit */
        !           103:        pid_t   sc_xfer;        /* used in xferring unit to another dev */
        !           104:        struct  ifqueue sc_inq; /* TTY side input queue */
        !           105:        struct  ifqueue sc_fastq; /* IP interactive output packet queue */
        !           106: #ifdef VJC
        !           107:        struct  slcompress sc_comp; /* vjc control buffer */
        !           108: #endif
        !           109:        u_int   sc_bytessent;   /* count of octets sent */
        !           110:        u_int   sc_bytesrcvd;   /* count of octets received */
        !           111:        caddr_t sc_bpf;         /* hook for BPF */
        !           112:        
        !           113:        /* Device-dependent part for async lines. */
        !           114:        ext_accm sc_asyncmap;   /* async control character map */
        !           115:        u_int32_t sc_rasyncmap; /* receive async control char map */
        !           116:        struct  mbuf *sc_outm;  /* mbuf chain being output currently */
        !           117:        struct  mbuf *sc_m;     /* pointer to input mbuf chain */
        !           118:        struct  mbuf *sc_mc;    /* pointer to current input mbuf */
        !           119:        char    *sc_mp;         /* pointer to next char in input mbuf */
        !           120:        short   sc_ilen;        /* length of input-packet-so-far */
        !           121:        u_short sc_fcs;         /* FCS so far (input) */
        !           122:        u_short sc_outfcs;      /* FCS so far for output packet */
        !           123:        u_char  sc_rawin[16];   /* chars as received */
        !           124:        int     sc_rawin_count; /* # in sc_rawin */
        !           125: };
        !           126: 
        !           127: /* flags */
        !           128: #define SC_COMP_PROT   0x00000001      /* protocol compression (output) */
        !           129: #define SC_COMP_AC     0x00000002      /* header compression (output) */
        !           130: #define        SC_COMP_TCP     0x00000004      /* TCP (VJ) compression (output) */
        !           131: #define SC_NO_TCP_CCID 0x00000008      /* disable VJ connection-id comp. */
        !           132: #define SC_REJ_COMP_AC 0x00000010      /* reject adrs/ctrl comp. on input */
        !           133: #define SC_REJ_COMP_TCP        0x00000020      /* reject TCP (VJ) comp. on input */
        !           134: #define SC_ENABLE_IP   0x00000100      /* IP packets may be exchanged */
        !           135: #define SC_DEBUG       0x00010000      /* enable debug messages */
        !           136: #define SC_LOG_INPKT   0x00020000      /* log contents of good pkts recvd */
        !           137: #define SC_LOG_OUTPKT  0x00040000      /* log contents of pkts sent */
        !           138: #define SC_LOG_RAWIN   0x00080000      /* log all chars received */
        !           139: #define SC_LOG_FLUSH   0x00100000      /* log all chars flushed */
        !           140: #define        SC_MASK         0x0fffffff      /* bits that user can change */
        !           141: 
        !           142: /* state bits */
        !           143: #define        SC_ESCAPED      0x80000000      /* saw a PPP_ESCAPE */
        !           144: #define        SC_FLUSH        0x40000000      /* flush input until next PPP_FLAG */
        !           145: #define SC_RCV_B7_0    0x01000000      /* have rcvd char with bit 7 = 0 */
        !           146: #define SC_RCV_B7_1    0x02000000      /* have rcvd char with bit 7 = 0 */
        !           147: #define SC_RCV_EVNP    0x04000000      /* have rcvd char with even parity */
        !           148: #define SC_RCV_ODDP    0x08000000      /* have rcvd char with odd parity */
        !           149: 
        !           150: /* this stuff doesn't belong here... */
        !           151: #define        PPPIOCGFLAGS    _IOR('t', 90, int)      /* get configuration flags */
        !           152: #define        PPPIOCSFLAGS    _IOW('t', 89, int)      /* set configuration flags */
        !           153: #define        PPPIOCGASYNCMAP _IOR('t', 88, int32_t)  /* get async map */
        !           154: #define        PPPIOCSASYNCMAP _IOW('t', 87, int32_t)  /* set async map */
        !           155: #define        PPPIOCGUNIT     _IOR('t', 86, int)      /* get ppp unit number */
        !           156: #define        PPPIOCGRASYNCMAP _IOR('t', 85, int32_t) /* get receive async map */
        !           157: #define        PPPIOCSRASYNCMAP _IOW('t', 84, int32_t) /* set receive async map */
        !           158: #define        PPPIOCGMRU      _IOR('t', 83, int)      /* get max receive unit */
        !           159: #define        PPPIOCSMRU      _IOW('t', 82, int)      /* set max receive unit */
        !           160: #define        PPPIOCSMAXCID   _IOW('t', 81, int)      /* set VJ max slot ID */
        !           161: #define PPPIOCGXASYNCMAP _IOR('t', 80, ext_accm) /* get extended ACCM */
        !           162: #define PPPIOCSXASYNCMAP _IOW('t', 79, ext_accm) /* set extended ACCM */
        !           163: #define PPPIOCXFERUNIT _IO('t', 78)            /* transfer PPP unit */
        !           164: 
        !           165: #if !defined(ifr_mtu)
        !           166: #define ifr_mtu        ifr_metric
        !           167: #endif
        !           168: 
        !           169: #endif /* _IF_PPP_H_ */

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