ripngd/ripngd.h

   1 /*
   2  * RIPng related value and structure.
   3  * Copyright (C) 1998 Kunihiro Ishiguro
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  19  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  20  * 02111-1307, USA.
  21  */
  22
  23 #ifndef _ZEBRA_RIPNG_RIPNGD_H
  24 #define _ZEBRA_RIPNG_RIPNGD_H
  25
  26 /* RIPng version and port number. */
  27 #define RIPNG_V1                         1
  28 #define RIPNG_PORT_DEFAULT             521
  29 #define RIPNG_VTY_PORT                2603
  30 #define RIPNG_VTYSH_PATH              "/tmp/.ripngd"
  31 #define RIPNG_MAX_PACKET_SIZE         1500
  32 #define RIPNG_PRIORITY_DEFAULT           0
  33
  34 /* RIPng commands. */
  35 #define RIPNG_REQUEST                    1
  36 #define RIPNG_RESPONSE                   2
  37
  38 /* RIPng metric and multicast group address. */
  39 #define RIPNG_METRIC_INFINITY           16
  40 #define RIPNG_METRIC_NEXTHOP          0xff
  41 #define RIPNG_GROUP              "ff02::9"
  42
  43 /* RIPng timers. */
  44 #define RIPNG_UPDATE_TIMER_DEFAULT      30
  45 #define RIPNG_TIMEOUT_TIMER_DEFAULT    180
  46 #define RIPNG_GARBAGE_TIMER_DEFAULT    120
  47
  48 /* Default config file name. */
  49 #define RIPNG_DEFAULT_CONFIG "ripngd.conf"
  50
  51 /* RIPng route types. */
  52 #define RIPNG_ROUTE_RTE                  0
  53 #define RIPNG_ROUTE_STATIC               1
  54 #define RIPNG_ROUTE_AGGREGATE            2
  55
  56 /* Interface send/receive configuration. */
  57 #define RIPNG_SEND_UNSPEC                0
  58 #define RIPNG_SEND_OFF                   1
  59 #define RIPNG_RECEIVE_UNSPEC             0
  60 #define RIPNG_RECEIVE_OFF                1
  61
  62 /* Split horizon definitions. */
  63 #define RIPNG_SPLIT_HORIZON_UNSPEC       0
  64 #define RIPNG_SPLIT_HORIZON_NONE         1
  65 #define RIPNG_SPLIT_HORIZON              2
  66 #define RIPNG_SPLIT_HORIZON_POISONED     3
  67
  68 /* RIP default route's accept/announce methods. */
  69 #define RIPNG_DEFAULT_ADVERTISE_UNSPEC   0
  70 #define RIPNG_DEFAULT_ADVERTISE_NONE     1
  71 #define RIPNG_DEFAULT_ADVERTISE          2
  72
  73 #define RIPNG_DEFAULT_ACCEPT_UNSPEC      0
  74 #define RIPNG_DEFAULT_ACCEPT_NONE        1
  75 #define RIPNG_DEFAULT_ACCEPT             2
  76
  77 /* Default value for "default-metric" command. */
  78 #define RIPNG_DEFAULT_METRIC_DEFAULT     1
  79
  80 /* For max RTE calculation. */
  81 #ifndef IPV6_HDRLEN
  82 #define IPV6_HDRLEN 40
  83 #endif /* IPV6_HDRLEN */
  84
  85 #ifndef IFMINMTU
  86 #define IFMINMTU    576
  87 #endif /* IFMINMTU */
  88
  89 /* RIPng structure. */
  90 struct ripng
  91 {
  92   /* RIPng socket. */
  93   int sock;
  94
  95   /* RIPng Parameters.*/
  96   u_char command;
  97   u_char version;
  98   unsigned long update_time;
  99   unsigned long timeout_time;
 100   unsigned long garbage_time;
 101   int max_mtu;
 102   int default_metric;
 103   int default_information;
 104
 105   /* Input/output buffer of RIPng. */
 106   struct stream *ibuf;
 107   struct stream *obuf;
 108
 109   /* RIPng routing information base. */
 110   struct route_table *table;
 111
 112   /* RIPng only static route information. */
 113   struct route_table *route;
 114
 115   /* RIPng aggregate route information. */
 116   struct route_table *aggregate;
 117
 118   /* RIPng threads. */
 119   struct thread *t_read;
 120   struct thread *t_write;
 121   struct thread *t_update;
 122   struct thread *t_garbage;
 123   struct thread *t_zebra;
 124
 125   /* Triggered update hack. */
 126   int trigger;
 127   struct thread *t_triggered_update;
 128   struct thread *t_triggered_interval;
 129
 130   /* For redistribute route map. */
 131   struct
 132   {
 133     char *name;
 134     struct route_map *map;
 135     int metric_config;
 136     u_int32_t metric;
 137   } route_map[ZEBRA_ROUTE_MAX];
 138 };
 139
 140 /* Routing table entry. */
 141 struct rte
 142 {
 143   struct in6_addr addr;
 144   u_short tag;
 145   u_char prefixlen;
 146   u_char metric;
 147 };
 148
 149 /* RIPNG send packet. */
 150 struct ripng_packet
 151 {
 152   u_char command;
 153   u_char version;
 154   u_int16_t zero;
 155   struct rte rte[1];
 156 };
 157
 158 /* Each route's information. */
 159 struct ripng_info
 160 {
 161   /* This route's type.  Static, ripng or aggregate. */
 162   u_char type;
 163
 164   /* Sub type for static route. */
 165   u_char sub_type;
 166
 167   /* RIPng specific information */
 168   struct in6_addr nexthop;
 169   struct in6_addr from;
 170
 171   /* Which interface does this route come from. */
 172   unsigned int ifindex;
 173
 174   /* Metric of this route.  */
 175   u_char metric;
 176
 177   /* Tag field of RIPng packet.*/
 178   u_int16_t tag;
 179
 180   /* For aggregation. */
 181   unsigned int suppress;
 182
 183   /* Flags of RIPng route. */
 184 #define RIPNG_RTF_FIB      1
 185 #define RIPNG_RTF_CHANGED  2
 186   u_char flags;
 187
 188   /* Garbage collect timer. */
 189   struct thread *t_timeout;
 190   struct thread *t_garbage_collect;
 191
 192   /* Route-map features - this variables can be changed. */
 193   u_char metric_set;
 194
 195   struct route_node *rp;
 196 };
 197
 198 /* RIPng tag structure. */
 199 struct ripng_tag
 200 {
 201   /* Tag value. */
 202   u_int16_t tag;
 203
 204   /* Port. */
 205   u_int16_t port;
 206
 207   /* Multicast group. */
 208   struct in6_addr maddr;
 209
 210   /* Table number. */
 211   int table;
 212
 213   /* Distance. */
 214   int distance;
 215
 216   /* Split horizon. */
 217   u_char split_horizon;
 218
 219   /* Poison reverse. */
 220   u_char poison_reverse;
 221 };
 222
 223 /* RIPng specific interface configuration. */
 224 struct ripng_interface
 225 {
 226   /* RIPng is enabled on this interface. */
 227   int enable_network;
 228   int enable_interface;
 229
 230   /* RIPng is running on this interface. */
 231   int running;
 232
 233   /* For filter type slot. */
 234 #define RIPNG_FILTER_IN  0
 235 #define RIPNG_FILTER_OUT 1
 236 #define RIPNG_FILTER_MAX 2
 237
 238   /* Access-list. */
 239   struct access_list *list[RIPNG_FILTER_MAX];
 240
 241   /* Prefix-list. */
 242   struct prefix_list *prefix[RIPNG_FILTER_MAX];
 243
 244   /* Route-map. */
 245   struct route_map *routemap[RIPNG_FILTER_MAX];
 246
 247   /* RIPng tag configuration. */
 248   struct ripng_tag *rtag;
 249
 250   /* Default information originate. */
 251   u_char default_originate;
 252
 253   /* Default information only. */
 254   u_char default_only;
 255
 256   /* Wake up thread. */
 257   struct thread *t_wakeup;
 258
 259   /* Passive interface. */
 260   int passive;
 261 };
 262
 263 /* All RIPng events. */
 264 enum ripng_event
 265 {
 266   RIPNG_READ,
 267   RIPNG_ZEBRA,
 268   RIPNG_REQUEST_EVENT,
 269   RIPNG_UPDATE_EVENT,
 270   RIPNG_TRIGGERED_UPDATE,
 271 };
 272
 273 /* RIPng timer on/off macro. */
 274 #define RIPNG_TIMER_ON(T,F,V) \
 275 do { \
 276    if (!(T)) \
 277       (T) = thread_add_timer (master, (F), rinfo, (V)); \
 278 } while (0)
 279
 280 #define RIPNG_TIMER_OFF(T) \
 281 do { \
 282    if (T) \
 283      { \
 284        thread_cancel(T); \
 285        (T) = NULL; \
 286      } \
 287 } while (0)
 288
 289 /* Count prefix size from mask length */
 290 #define PSIZE(a) (((a) + 7) / (8))
 291
 292 /* Extern variables. */
 293 extern struct ripng *ripng;
 294
 295 extern struct thread_master *master;
 296
 297 /* Prototypes. */
 298 void ripng_init ();
 299 void ripng_if_init ();
 300 void ripng_terminate ();
 301 void ripng_zclient_start ();
 302 void zebra_init ();
 303 struct ripng_info * ripng_info_new ();
 304 void ripng_info_free (struct ripng_info *rinfo);
 305 void ripng_event (enum ripng_event, int);
 306 int ripng_request (struct interface *ifp);
 307 void ripng_redistribute_add (int, int, struct prefix_ipv6 *, unsigned int);
 308 void ripng_redistribute_delete (int, int, struct prefix_ipv6 *, unsigned int);
 309 void ripng_redistribute_withdraw (int type);
 310
 311 void ripng_distribute_update_interface (struct interface *);
 312 void ripng_if_rmap_update_interface (struct interface *);
 313
 314 void ripng_zebra_ipv6_add (struct prefix_ipv6 *p, struct in6_addr *nexthop, unsigned int ifindex);
 315 void ripng_zebra_ipv6_delete (struct prefix_ipv6 *p, struct in6_addr *nexthop, unsigned int ifindex);
 316 void ripng_route_map_init ();
 317
 318 #endif /* _ZEBRA_RIPNG_RIPNGD_H */