bsd/netat/routing_tables.h

   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  *    This include file defines the RTMP table and ZIP table
  24  *    for the AppleTalk AIX router
  25  *
  26  *
  27  *  0.01        03/16/94        LD      Creation
  28  *  0.10        08/19/94        LD      merged
  29  *
  30  */
  31
  32 #ifndef _NETAT_ROUTING_TABLES_H_
  33 #define _NETAT_ROUTING_TABLES_H_
  34
  35 /* RTMP table entry state bitmap (EntryState) values */
  36
  37 #define RTE_STATE_UNUSED        0               /* this entry is not in used */
  38 #define RTE_STATE_BAD           2               /* The route is almost ready to be removed */
  39 #define RTE_STATE_SUSPECT       4               /* didn't received an update for route */
  40 #define RTE_STATE_GOOD          8               /* this route is 100% valid */
  41 #define RTE_STATE_ZKNOWN        16              /* we know the zones for this entry */
  42 #define RTE_STATE_UPDATED       32              /* set when updated from received rtmp table */
  43 #define RTE_STATE_BKUP          64      /* for future use : AURP */
  44 #define RTE_STATE_PERMANENT     128     /* This is a directly attached route */
  45
  46 #define PORT_ONLINE             32      /* router port in forwarding state */
  47 #define PORT_SEEDING            31      /* router port seeding  */
  48 #define PORT_ACTIVATING         16      /* router port waiting for net infos */
  49 #define PORT_ERR_NOZONE         6       /* router no zones for non seed port*/
  50 #define PORT_ERR_BADRTMP        5       /* router problem bad rtmp version*/
  51 #define PORT_ERR_STARTUP        4       /* router problem cable in start range*/
  52 #define PORT_ERR_CABLER         3       /* router problem bad cable range*/
  53 #define PORT_ERR_SEED           2       /* router startup seeding problem */
  54 #define PORT_ONERROR            1       /* router port with generic problem*/
  55 #define PORT_OFFLINE            0       /* router port disabled/not ready */
  56
  57 #define ZT_MAX                  1024    /* Don't allow more zones than that */
  58 #define ZT_MIN                  32      /* Minimum for a good behaviour*/
  59 #define ZT_DEFAULT              512     /* Minimum for a good behaviour*/
  60 #define RT_MAX                  4096    /* Don't allow more entries than that */
  61 #define RT_MIN                  128     /* Minimum for a good behaviour*/
  62 #define RT_DEFAULT              1024    /* Minimum for a good behaviour*/
  63 #define ZT_BYTES                (ZT_MAX/8)      /* Bytes in Zone Bitmap */
  64 #define ZT_MAXEDOUT             ZT_MAX+1        /* reached the entry limit.. */
  65 #define RT_MIX_DEFAULT          2000    /* default for nbr of ppsec */
  66
  67
  68 #define NOTIFY_N_DIST   31      /* Notify Neighbor distance (when shutdown or so) */
  69
  70 /* Useful macros to access the RTMP tuple fields */
  71
  72 #define TUPLENET(x) NET_VALUE(((at_rtmp_tuple *)(x))->at_rtmp_net)
  73 #define TUPLEDIST(x)  ((((at_rtmp_tuple *)(x))->at_rtmp_data) & RTMP_DISTANCE)
  74 #define TUPLERANGE(x) ((((at_rtmp_tuple *)(x))->at_rtmp_data) & RTMP_RANGE_FLAG)
  75
  76 #define CableStart  ifID->ifThisCableStart
  77 #define CableStop  ifID->ifThisCableEnd
  78
  79 #define RTMP_IDLENGTH   4       /* RTMP packet Node header length */
  80
  81
  82 #define RTMP_VERSION_NUMBER 0x82        /* V2 only version of RTMP supported */
  83
  84 #define ERTR_SEED_CONFLICT  0x101   /* Conflict between port information and net
  85                                      * value received for the port (fatal for Rtr)
  86                                      */
  87 #define ERTR_CABLE_CONFLICT 0x102   /* Conflict between port information and net
  88                                      * information received in a RTMP packet
  89                                      */
  90
  91 #define ERTR_RTMP_BAD_VERSION  0x103   /* We received a non phase-II RTMP packet
  92                                          * that's bad... We can't deal with it
  93                                          */
  94
  95 #define ERTR_CABLE_STARTUP  0x104   /* the cable range we're on happen to
  96                                                                          * be in the startup range. Shouldn't
  97                                      */
  98
  99 #define ERTR_CABLE_NOZONE       0x105   /* We haven't found any zones for that port
 100                                                                          * after all the timeout expired
 101                                                                          */
 102
 103
 104 /* RTMP table entry */
 105
 106 typedef struct rt_entry {
 107
 108         struct rt_entry *left;          /* btree left pointer */
 109         struct rt_entry *right;         /* btree right pointer */
 110
 111         at_net_al NetStop;              /* Last net # in the range, or network # if
 112                                            non extended network */
 113         at_net_al NetStart;             /* Starting network number in the range, 0
 114                                            non extended network */
 115         at_net_al NextIRNet;            /* Network number of next Internet Router */
 116         at_node NextIRNode;             /* Node ID of next Router */
 117         u_char ZoneBitMap[ZT_BYTES];    /* One bit per Zone defined for this entry */
 118         u_char NetDist;                 /* Distance in hops of the destination net */
 119         u_char NetPort;                 /* Physical port number to forward to */
 120         u_char EntryState;              /* State of the entry bitmap field */
 121         u_char RTMPFlag;
 122         u_char AURPFlag;
 123
 124 } RT_entry;
 125
 126
 127 /* ZIP Table entry */
 128
 129 typedef struct {
 130
 131         u_short ZoneCount;              /* Count of reference to zone entry */
 132         at_nvestr_t Zone;               /* zone name as a Network Visible Entity */
 133
 134 } ZT_entry;
 135
 136 /* for zone retrieval to user space only */
 137 typedef struct {
 138         unsigned short  entryno;        /* zone table entry number (1st = 0) */
 139         ZT_entry        zt;             /* the zone table entry */
 140 } ZT_entryno;
 141
 142 #ifdef KERNEL
 143
 144 /* Macros for Routing table B-tree easy access */
 145
 146 #define RT_DELETE(NetStop, NetStart) {\
 147     RT_entry *found; \
 148     if ((found = rt_bdelete(NetStop, NetStart))) { \
 149         memset(found, '\0', sizeof(RT_entry)); \
 150         found->right = RT_table_freelist; \
 151         RT_table_freelist  = found; \
 152     } \
 153 }
 154
 155 /* Set/Reset and test the All zones known bit in for the entry field */
 156
 157 #define RT_ALL_ZONES_KNOWN(entry)       ((entry)->EntryState & RTE_STATE_ZKNOWN)
 158 #define RT_SET_ZONE_KNOWN(entry)        ((entry)->EntryState |= RTE_STATE_ZKNOWN)
 159 #define RT_CLR_ZONE_KNOWN(entry)        ((entry)->EntryState ^= RTE_STATE_ZKNOWN)
 160
 161 /*
 162  * check if a zone number is in a given zone map
 163  */
 164 #define ZT_ISIN_ZMAP(znum, zmap) ((zmap)[(znum-1) >> 3] & 0x80 >> (znum-1) % 8)
 165
 166 /* remove a zone from the zone bitmap, and check if the zone
 167  * is still in use by someone else.
 168  */
 169
 170 #define ZT_CLR_ZMAP(num, zmap) {                                        \
 171         if ((zmap)[(num-1) >> 3] & 0x80 >> (num-1) % 8) {       \
 172                 (zmap)[(num-1) >> 3] ^= 0x80 >> (num-1) % 8;    \
 173                 ZT_table[(num-1)].ZoneCount-- ;                         \
 174         }                                                                                               \
 175 }
 176
 177 /* set a bit in an entry bit map */
 178
 179 #define ZT_SET_ZMAP(num, zmap) {                                                \
 180         if (!zmap[(num-1) >> 3] & 0x80 >> (num-1) % 8) {        \
 181                 zmap[(num-1) >> 3] |= 0x80 >> (num-1) % 8;              \
 182                 ZT_table[(num-1)].ZoneCount++ ;                                 \
 183         }                                                                                                       \
 184 }
 185
 186 extern int regDefaultZone(at_ifaddr_t *);
 187 extern int zonename_equal(at_nvestr_t *, at_nvestr_t *);
 188
 189 extern RT_entry *RT_table_freelist;
 190 extern RT_entry RT_table_start;
 191 extern RT_entry *RT_table;
 192 extern RT_entry *rt_binsert();
 193 extern RT_entry *rt_insert();
 194 extern RT_entry *rt_bdelete();
 195 extern RT_entry *rt_blookup(int);
 196 extern RT_entry *rt_getNextRoute(int);
 197
 198 extern ZT_entry *ZT_table;
 199 extern short    RT_maxentry;
 200 extern short    ZT_maxentry;
 201
 202 extern volatile int RouterMix;
 203
 204 extern int zt_add_zone(char *, short);
 205 extern int zt_add_zonename(at_nvestr_t *);
 206 extern int zt_ent_zindex(u_char *);
 207 extern ZT_entryno *zt_getNextZone(int);
 208 extern void zt_remove_zones(u_char *);
 209 extern void zt_set_zmap(u_short, char *);
 210 extern void rtmp_router_input();
 211
 212 #endif /* KERNEL */
 213
 214 #endif /* _NETAT_ROUTING_TABLES_H_ */