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Annotation of XNU/bsd/net/if_pppvar.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * if_pppvar.h - private structures and declarations for PPP.
        !            24:  *
        !            25:  * Copyright (c) 1994 The Australian National University.
        !            26:  * All rights reserved.
        !            27:  *
        !            28:  * Permission to use, copy, modify, and distribute this software and its
        !            29:  * documentation is hereby granted, provided that the above copyright
        !            30:  * notice appears in all copies.  This software is provided without any
        !            31:  * warranty, express or implied. The Australian National University
        !            32:  * makes no representations about the suitability of this software for
        !            33:  * any purpose.
        !            34:  *
        !            35:  * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
        !            36:  * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
        !            37:  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
        !            38:  * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
        !            39:  * OF SUCH DAMAGE.
        !            40:  *
        !            41:  * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
        !            42:  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
        !            43:  * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
        !            44:  * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
        !            45:  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
        !            46:  * OR MODIFICATIONS.
        !            47:  *
        !            48:  * Copyright (c) 1989 Carnegie Mellon University.
        !            49:  * All rights reserved.
        !            50:  *
        !            51:  * Redistribution and use in source and binary forms are permitted
        !            52:  * provided that the above copyright notice and this paragraph are
        !            53:  * duplicated in all such forms and that any documentation,
        !            54:  * advertising materials, and other materials related to such
        !            55:  * distribution and use acknowledge that the software was developed
        !            56:  * by Carnegie Mellon University.  The name of the
        !            57:  * University may not be used to endorse or promote products derived
        !            58:  * from this software without specific prior written permission.
        !            59:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            60:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            61:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            62:  *
        !            63:  */
        !            64: 
        !            65: /*
        !            66:  * Supported network protocols.  These values are used for
        !            67:  * indexing sc_npmode.
        !            68:  */
        !            69: #define NP_IP  0               /* Internet Protocol */
        !            70: #define NUM_NP 1               /* Number of NPs. */
        !            71: 
        !            72: /*
        !            73:  * Structure describing each ppp unit.
        !            74:  */
        !            75: struct ppp_softc {
        !            76:        struct  ifnet sc_if;            /* network-visible interface */
        !            77: /*hi*/ u_int   sc_flags;               /* control/status bits; see if_ppp.h */
        !            78:        struct  callout_handle sc_ch;   /* Used for scheduling timeouts */
        !            79:        void    *sc_devp;               /* pointer to device-dep structure */
        !            80:        void    (*sc_start) __P((struct ppp_softc *));  /* start output proc */
        !            81:        void    (*sc_ctlp) __P((struct ppp_softc *)); /* rcvd control pkt */
        !            82:        void    (*sc_relinq) __P((struct ppp_softc *)); /* relinquish ifunit */
        !            83:        void    (*sc_setmtu) __P((struct ppp_softc *)); /* set mtu */
        !            84:        short   sc_mru;                 /* max receive unit */
        !            85:        pid_t   sc_xfer;                /* used in transferring unit */
        !            86: /*hi*/ struct  ifqueue sc_rawq;        /* received packets */
        !            87: /*net*/        struct  ifqueue sc_inq;         /* queue of input packets for daemon */
        !            88: /*net*/        struct  ifqueue sc_fastq;       /* interactive output packet q */
        !            89:        struct  mbuf *sc_npqueue;       /* output packets not to be sent yet */
        !            90:        struct  mbuf **sc_npqtail;      /* ptr to last next ptr in npqueue */
        !            91:        struct  pppstat sc_stats;       /* count of bytes/pkts sent/rcvd */
        !            92:        enum    NPmode sc_npmode[NUM_NP]; /* what to do with each NP */
        !            93:        struct  compressor *sc_xcomp;   /* transmit compressor */
        !            94:        void    *sc_xc_state;           /* transmit compressor state */
        !            95:        struct  compressor *sc_rcomp;   /* receive decompressor */
        !            96:        void    *sc_rc_state;           /* receive decompressor state */
        !            97:        time_t  sc_last_sent;           /* time (secs) last NP pkt sent */
        !            98:        time_t  sc_last_recv;           /* time (secs) last NP pkt rcvd */
        !            99: #if PPP_FILTER
        !           100:        struct  bpf_program sc_pass_filt;   /* filter for packets to pass */
        !           101:        struct  bpf_program sc_active_filt; /* filter for "non-idle" packets */
        !           102: #endif /* PPP_FILTER */
        !           103: #if    VJC
        !           104:        struct  slcompress *sc_comp;    /* vjc control buffer */
        !           105: #endif
        !           106: 
        !           107:        /* Device-dependent part for async lines. */
        !           108:        ext_accm sc_asyncmap;           /* async control character map */
        !           109:        u_long  sc_rasyncmap;           /* receive async control char map */
        !           110:        struct  mbuf *sc_outm;          /* mbuf chain currently being output */
        !           111:        struct  mbuf *sc_m;             /* pointer to input mbuf chain */
        !           112:        struct  mbuf *sc_mc;            /* pointer to current input mbuf */
        !           113:        char    *sc_mp;                 /* ptr to next char in input mbuf */
        !           114:        short   sc_ilen;                /* length of input packet so far */
        !           115:        u_short sc_fcs;                 /* FCS so far (input) */
        !           116:        u_short sc_outfcs;              /* FCS so far for output packet */
        !           117:        u_char  sc_rawin[16];           /* chars as received */
        !           118:        int     sc_rawin_count;         /* # in sc_rawin */
        !           119: };
        !           120: 
        !           121: extern struct ppp_softc ppp_softc[NPPP];
        !           122: 
        !           123: struct ppp_softc *pppalloc __P((pid_t pid));
        !           124: void   pppdealloc __P((struct ppp_softc *sc));
        !           125: int    pppioctl __P((struct ppp_softc *sc, u_long cmd, caddr_t data,
        !           126:                      int flag, struct proc *p));
        !           127: int    pppoutput __P((struct ifnet *ifp, struct mbuf *m0,
        !           128:                       struct sockaddr *dst, struct rtentry *rtp));
        !           129: void   ppp_restart __P((struct ppp_softc *sc));
        !           130: void   ppppktin __P((struct ppp_softc *sc, struct mbuf *m, int lost));
        !           131: struct mbuf *ppp_dequeue __P((struct ppp_softc *sc));

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