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Annotation of kernel/bsd/netat/at/at_lap.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: /*
        !            26:  *
        !            27:  *
        !            28:  * ORIGINS: 82
        !            29:  *
        !            30:  * APPLE CONFIDENTIAL
        !            31:  * (C) COPYRIGHT Apple Computer, Inc. 1992-1996
        !            32:  * All Rights Reserved
        !            33:  *
        !            34:  */                                                                   
        !            35: 
        !            36: /* The at_if structure identifies a LAP interface to DDP.  These structs
        !            37:  * are stored in a doubly-linked list.  When DDP needs to send a packet,
        !            38:  * it traverses this list for the interface to send the packet on.  
        !            39:  * For an end-node this will usually be the first and only interface.  
        !            40:  * If we're a router and the destination network is non-zero, DDP 
        !            41:  * calls the internet router routine instead of traversing its list.
        !            42:  *
        !            43:  * Feb-June 1994: Modified for Router support 
        !            44:  */
        !            45: #ifndef __AT_LAP__
        !            46: #define __AT_LAP__
        !            47: #include <at/nbp.h>
        !            48: 
        !            49: typedef struct at_if_statstics {
        !            50:        u_long  fwdBytes;                       /* bytes received & forwarded */
        !            51:        u_long  fwdPkts;                        /* pkts  received & forwarded */
        !            52:        u_long  droppedBytes;           /* bytes received & dropped */
        !            53:        u_long  droppedPkts;            /* pkts  received & dropped */ 
        !            54:        u_long  outBytes;                       /* bytes sent */
        !            55:        u_long  outPkts;                        /* pkts  sent */
        !            56:        u_long  routes;                         /* count of routes in rtmptable */
        !            57: } at_if_statistics_t;
        !            58: 
        !            59: typedef char if_name_t[IF_NAME_LEN];
        !            60: 
        !            61: 
        !            62: typedef struct at_if {
        !            63:        /* The DDP sets these values: */
        !            64:        struct at_if            *FwdLink;
        !            65:        struct at_if            *BwdLink;
        !            66: 
        !            67:        u_char                          ifState;        /* State of the interface;
        !            68:                                                                         * See values below
        !            69:                                                                         */
        !            70:        u_char                          ifUnit;
        !            71: 
        !            72:        at_net_al                       ifThisCableStart;
        !            73:        at_net_al                       ifThisCableEnd;
        !            74: 
        !            75:        /* Note: these are legacy fields used only in user mode */
        !            76: 
        !            77:        struct  atalk_addr      ifARouter;
        !            78:        u_char                          ifRouterState;
        !            79:        u_long                          ifARouterTimer;
        !            80: 
        !            81:        char                            *ddpInputQueue; /* Input queue for DDP, 
        !            82:                                                                                 * used by lap 
        !            83:                                                                                 */
        !            84:        /* The LAP layer sets these values before calling 
        !            85:         * at_ddp_add_if(): 
        !            86:         */
        !            87: 
        !            88:        void                    *tmo_1;
        !            89:        void                    *tmo_2;
        !            90:        void                    *tmo_3;
        !            91:        void                    *tmo_4;
        !            92:        int                                     ifFlags;        /* Flags, see AT_IFF_*  */
        !            93:        struct  atalk_addr      ifThisNode;     /* AppleTalk node ID */
        !            94: 
        !            95:        /* for use by ZIP */
        !            96: 
        !            97:        u_char                          ifNumRetries;
        !            98:        at_nvestr_t                     ifZoneName;
        !            99:        int                                     ifZipError;
        !           100: 
        !           101:        /* Added for routing support */
        !           102: 
        !           103:        void                            *ifLapp;        /* parent lapp struct. Cast to 
        !           104:                                                                           correct type ( elap_specifics_t etc.) */
        !           105:        int                                     ifPort;         /* the unique ddp logical port number */
        !           106:        if_name_t                       ifName; /* added to support LAP_IOC_GET_IFID */
        !           107:        char                            ifType;
        !           108: 
        !           109:        u_short                         ifDefZone;                      /*  Default Zone index in ZoneTable*/
        !           110:        char                            ifZipNeedQueries;       /* ZIP/RTMP Query flag */
        !           111:        char                            ifRoutingState; /* Port (as a router) state */
        !           112:        at_if_statistics_t      ifStatistics;           /* statistics */
        !           113: } at_if_t;
        !           114: 
        !           115: 
        !           116: typedef union  at_if_name {
        !           117: at_if_t                ifID;
        !           118: if_name_t      if_name;
        !           119: }at_if_name_t;
        !           120: 
        !           121: 
        !           122: /* for ifType above */
        !           123: #define        IFTYPE_ETHERTALK        1
        !           124: #define        IFTYPE_TOKENTALK        2
        !           125: #define        IFTYPE_FDDITALK 3
        !           126: #define        IFTYPE_NULLTALK 4
        !           127: #define        IFTYPE_LOCALTALK        5
        !           128: #define        IFTYPE_OTHERTALK        9
        !           129: 
        !           130: /* for ifRouterState field above */
        !           131: #define        NO_ROUTER               1       /* there's no router around     */
        !           132: #define        ROUTER_WARNING  2       /* there's a router around that */
        !           133:                                                        /* we are ignoring, warning has */
        !           134:                                                        /* been issued to the user      */
        !           135: #define        ROUTER_AROUND   3       /* A router is around and we've */
        !           136:                                                        /* noted its presence           */
        !           137: 
        !           138: #define ROUTER_UPDATED  4      /* for mh tracking of routers. Value decremented
        !           139:                                with rtmp aging timer, a value of 4 allows a 
        !           140:                                                       minimum of 40 secs to laps before we decide
        !           141:                                                           to revert to cable multicasts */
        !           142:               
        !           143: /* for ifState above */
        !           144: #define        LAP_OFFLINE                     0       /* LAP_OFFLINE MUST be 0 */     
        !           145: #define        LAP_ONLINE                      1
        !           146: #define        LAP_ONLINE_FOR_ZIP      2
        !           147: #define        LAP_HANGING_UP          3
        !           148: #define        LAP_ONLINE_ZONELESS     4       /* for non-home router ports */
        !           149: 
        !           150:        /* addr lengths */
        !           151: #define ETHERNET_ADDR_LEN      6
        !           152: 
        !           153:        /* macros */
        !           154: #define IF_NO(c)    (atoi(&c[2]))       /* return i/f number from h/w name
        !           155:                                                                                   (e.g. 'et2' returns 2) */
        !           156: 
        !           157:                                                        /* returns elap_specfics_t ptr from ifID pointer */
        !           158: #define IFID2ELAP(ifid)                ((elap_specifics_t *)((ifid)->ifLapp))
        !           159:                                                        /* returns ptr to if_name from elap_specifics_t ptr */
        !           160: #define ELAPP2IFNAME(elapp) (elapp->cfg.if_name)
        !           161:                                                        /* returns ptr to if_name from ifID ptr */
        !           162: #define IFID2IFNAME(ifid)      (ELAPP2IFNAME(IFID2ELAP(ifid)))
        !           163: 
        !           164:                                                        /* returns ddp port # from elap unit # */
        !           165: #define ELAP_UNIT2PORT(n)      elap_specifics[(n)].elap_if.ifPort
        !           166: 
        !           167:                                                        /* returns cable range end from
        !           168:                                                           elap unit # */
        !           169: #define ELAP_UNIT2NETSTOP(n)   \
        !           170:                                                elap_specifics[(n)].elap_if.ifThisCableEnd
        !           171: 
        !           172:                                                        /* sanity check for ifID validity. Evaluates
        !           173:                                                           to TRUE if ifID is OK  */
        !           174: #define IFID_VALID(ifID) \
        !           175:        (&((elap_specifics_t *)ifID->ifLapp)->elap_if == ifID)
        !           176: 
        !           177: #endif /* __AT_LAP__ */
        !           178: 

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