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Annotation of kernel/bsd/netat/h/routing_tables.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:  *    This include file defines the RTMP table and ZIP table
        !            27:  *    for the AppleTalk AIX router
        !            28:  *
        !            29:  */
        !            30: 
        !            31: extern at_state_t at_state;
        !            32: 
        !            33: #define ROUTING_MODE   (at_state.flags & AT_ST_ROUTER)
        !            34: #define MULTIHOME_MODE (at_state.flags & AT_ST_MULTIHOME)
        !            35: #define MULTIPORT_MODE (ROUTING_MODE || MULTIHOME_MODE)
        !            36: 
        !            37: #define DDP_MAX_DATA 586       /* should probably be somewhere else... */
        !            38: 
        !            39: /* RTMP table entry state bitmap (EntryState) values */
        !            40: 
        !            41: #define RTE_STATE_UNUSED       0               /* this entry is not in used */
        !            42: #define RTE_STATE_BAD          2               /* The route is almost ready to be removed */
        !            43: #define RTE_STATE_SUSPECT      4               /* didn't received an update for route */
        !            44: #define RTE_STATE_GOOD         8               /* this route is 100% valid */
        !            45: #define RTE_STATE_ZKNOWN       16              /* we know the zones for this entry */
        !            46: #define RTE_STATE_UPDATED      32              /* set when updated from received rtmp table */
        !            47: #define RTE_STATE_BKUP         64              /* for future use : AURP */
        !            48: #define RTE_STATE_PERMANENT    128             /* This is a directly attached route */
        !            49: 
        !            50: #define PORT_ONLINE                    32              /* router port in forwarding state */
        !            51: #define PORT_SEEDING           31              /* router port seeding  */
        !            52: #define PORT_ACTIVATING        16              /* router port waiting for net infos */
        !            53: #define PORT_ERR_NOZONE                6               /* router no zones for non seed port*/
        !            54: #define PORT_ERR_BADRTMP       5               /* router problem bad rtmp version*/
        !            55: #define PORT_ERR_STARTUP       4               /* router problem cable in start range*/
        !            56: #define PORT_ERR_CABLER                3               /* router problem bad cable range*/
        !            57: #define PORT_ERR_SEED          2               /* router startup seeding problem */
        !            58: #define PORT_ONERROR           1               /* router port with generic problem*/
        !            59: #define PORT_OFFLINE           0               /* router port disabled/not ready */
        !            60: 
        !            61: #define ZT_MAX                         1024    /* Don't allow more zones than that */
        !            62: #define ZT_MIN                         32              /* Minimum for a good behaviour*/
        !            63: #define ZT_DEFAULT                     512             /* Minimum for a good behaviour*/
        !            64: #define RT_MAX                         4096    /* Don't allow more entries than that */
        !            65: #define RT_MIN                         128             /* Minimum for a good behaviour*/
        !            66: #define RT_DEFAULT                     1024    /* Minimum for a good behaviour*/
        !            67: #define ZT_BYTES                       (ZT_MAX/8)              /* Bytes in Zone Bitmap */
        !            68: #define ZT_MAXEDOUT                    ZT_MAX+1        /* reached the entry limit.. */
        !            69: 
        !            70: 
        !            71: #define NOTIFY_N_DIST   31      /* Notify Neighbor distance (when shutdown or so) */
        !            72: 
        !            73: /* Useful macros to access the RTMP tuple fields */
        !            74: 
        !            75: #define TUPLENET(x) NET_VALUE(((at_rtmp_tuple *)(x))->at_rtmp_net)
        !            76: #define TUPLEDIST(x)  ((((at_rtmp_tuple *)(x))->at_rtmp_data) & RTMP_DISTANCE)
        !            77: #define TUPLERANGE(x) ((((at_rtmp_tuple *)(x))->at_rtmp_data) & RTMP_RANGE_FLAG)
        !            78: 
        !            79: #define CableStart  ifID->ifThisCableStart
        !            80: #define CableStop  ifID->ifThisCableEnd
        !            81: 
        !            82: #define RTMP_IDLENGTH  4       /* RTMP packet Node header length */
        !            83: 
        !            84: 
        !            85: #define RTMP_VERSION_NUMBER 0x82       /* V2 only version of RTMP supported */
        !            86: #define RTR_NXNET_PORT         0x10000000  /* Non Extended net port */
        !            87: #define RTR_XNET_PORT          0x20000000  /* Extended net port */
        !            88: #define RTR_SEED_PORT          0x40000000  /* Seed port require config net values*/
        !            89: 
        !            90: #define ERTR_SEED_CONFLICT  0x101   /* Conflict between port information and net
        !            91:                                      * value received for the port (fatal for Rtr)
        !            92:                                      */
        !            93: #define ERTR_CABLE_CONFLICT 0x102   /* Conflict between port information and net
        !            94:                                      * information received in a RTMP packet
        !            95:                                      */
        !            96: 
        !            97: #define ERTR_RTMP_BAD_VERSION  0x103   /* We received a non phase-II RTMP packet
        !            98:                                          * that's bad... We can't deal with it
        !            99:                                          */
        !           100: 
        !           101: #define ERTR_CABLE_STARTUP  0x104   /* the cable range we're on happen to
        !           102:                                                                         * be in the startup range. Shouldn't
        !           103:                                      */
        !           104: 
        !           105: #define ERTR_CABLE_NOZONE      0x105   /* We haven't found any zones for that port
        !           106:                                                                         * after all the timeout expired
        !           107:                                                                         */
        !           108: 
        !           109: 
        !           110: /* RTMP table entry */
        !           111: 
        !           112: typedef struct rt_entry {
        !           113: 
        !           114:        struct rt_entry *left;          /* btree left pointer */
        !           115:        struct rt_entry *right;         /* btree right pointer */
        !           116: 
        !           117:        at_net_al NetStop;                      /* Last net # in the range, or network # if
        !           118:                                                                   non extended network */
        !           119:        at_net_al NetStart;                     /* Starting network number in the range, 0
        !           120:                                                                   non extended network */
        !           121:        at_net_al NextIRNet;            /* Network number of next Internet Router */
        !           122:        at_node NextIRNode;                     /* Node ID of next Router */
        !           123:        u_char ZoneBitMap[ZT_BYTES];/* One bit per Zone defined for this entry */
        !           124:        u_char NetDist;                         /* Distance in hops of the destination net */
        !           125:        u_char NetPort;                         /* Physical port number to forward to */
        !           126:        u_char EntryState;                      /* State of the entry bitmap field */
        !           127:        u_char RTMPFlag;
        !           128:        u_char AURPFlag;
        !           129: 
        !           130: } RT_entry;
        !           131: 
        !           132:        
        !           133: /* ZIP Table entry */
        !           134: 
        !           135: typedef struct {
        !           136: 
        !           137:        u_short ZoneCount;                      /* Count of reference to zone entry */
        !           138:        at_nvestr_t Zone;                       /* zone name as a Network Visible Entity */
        !           139: 
        !           140: } ZT_entry;
        !           141: 
        !           142: /* for zone retrieval to user space only */
        !           143: typedef struct {
        !           144:        unsigned short  entryno;                /* zone table entry number (1st = 0) */
        !           145:        ZT_entry        zt;                             /* the zone table entry */
        !           146: } ZT_entryno;
        !           147: 
        !           148: /* Macros for Routing table B-tree easy access */
        !           149: 
        !           150: extern RT_entry *RT_table_freelist;
        !           151: extern RT_entry RT_table_start;
        !           152: extern RT_entry *RT_table;
        !           153: extern RT_entry *rt_binsert();
        !           154: extern RT_entry *rt_insert();
        !           155: extern RT_entry *rt_bdelete();
        !           156: extern RT_entry *rt_blookup();
        !           157: 
        !           158: extern ZT_entry *ZT_table;
        !           159: extern zt_add_zone();
        !           160: extern short   RT_MAXENTRY;
        !           161: extern short   ZT_MAXENTRY;
        !           162: 
        !           163: #define RT_DELETE(NetStop, NetStart) {\
        !           164:     RT_entry *found; \
        !           165:     if (found = rt_bdelete(NetStop, NetStart)) { \
        !           166:         memset(found, '\0', sizeof(RT_entry)); \
        !           167:         found->right = RT_table_freelist; \
        !           168:         RT_table_freelist  = found; \
        !           169:     } \
        !           170: }
        !           171: 
        !           172: #define RT_LOOKUP(x) rt_blookup(x.NetStop)
        !           173: 
        !           174: 
        !           175: /* Set/Reset and test the All zones known bit in for the entry field */
        !           176: 
        !           177: #define RT_ALL_ZONES_KNOWN(entry)      ((entry)->EntryState & RTE_STATE_ZKNOWN)
        !           178: #define RT_SET_ZONE_KNOWN(entry)       ((entry)->EntryState |= RTE_STATE_ZKNOWN)
        !           179: #define RT_CLR_ZONE_KNOWN(entry)       ((entry)->EntryState ^= RTE_STATE_ZKNOWN)
        !           180: 
        !           181: #define ZT_ADD_ZONE(name, length)  zt_add_zone(name, length)
        !           182: /*
        !           183:  * check if a zone number is in a given zone map
        !           184:  */
        !           185: #define ZT_ISIN_ZMAP(znum, zmap) ((zmap)[(znum-1) >> 3] & 0x80 >> (znum-1) % 8)
        !           186: 
        !           187: /* remove a zone from the zone bitmap, and check if the zone
        !           188:  * is still in use by someone else.
        !           189:  */
        !           190: 
        !           191: #define ZT_CLR_ZMAP(num, zmap) {                                       \
        !           192:        if ((zmap)[(num-1) >> 3] & 0x80 >> (num-1) % 8) {       \
        !           193:                (zmap)[(num-1) >> 3] ^= 0x80 >> (num-1) % 8;    \
        !           194:                ZT_table[(num-1)].ZoneCount-- ;                         \
        !           195:        }                                                                                               \
        !           196: }
        !           197: 
        !           198: /* set a bit in an entry bit map */
        !           199: 
        !           200: #define ZT_SET_ZMAP(num, zmap) {                                               \
        !           201:        if (!zmap[(num-1) >> 3] & 0x80 >> (num-1) % 8) {        \
        !           202:                zmap[(num-1) >> 3] |= 0x80 >> (num-1) % 8;              \
        !           203:                ZT_table[(num-1)].ZoneCount++ ;                                 \
        !           204:        }                                                                                                       \
        !           205: }
        !           206: 
        !           207: 

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