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 along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #ifndef _ZEBRA_RIPNG_RIPNGD_H
  23 #define _ZEBRA_RIPNG_RIPNGD_H
  24
  25 #include <zclient.h>
  26 #include <vty.h>
  27 #include <distribute.h>
  28 #include <vector.h>
  29 #include <memory.h>
  30
  31 /* RIPng version and port number. */
  32 #define RIPNG_V1                         1
  33 #define RIPNG_PORT_DEFAULT             521
  34 #define RIPNG_VTY_PORT                2603
  35 #define RIPNG_MAX_PACKET_SIZE         1500
  36 #define RIPNG_PRIORITY_DEFAULT           0
  37
  38 /* RIPng commands. */
  39 #define RIPNG_REQUEST                    1
  40 #define RIPNG_RESPONSE                   2
  41
  42 /* RIPng metric and multicast group address. */
  43 #define RIPNG_METRIC_INFINITY           16
  44 #define RIPNG_METRIC_NEXTHOP          0xff
  45 #define RIPNG_GROUP              "ff02::9"
  46
  47 /* RIPng peer timeout value. */
  48 #define RIPNG_PEER_TIMER_DEFAULT       180
  49
  50 /* Default config file name. */
  51 #define RIPNG_DEFAULT_CONFIG "ripngd.conf"
  52
  53 /* RIPng route types. */
  54 #define RIPNG_ROUTE_RTE                  0
  55 #define RIPNG_ROUTE_STATIC               1
  56 #define RIPNG_ROUTE_DEFAULT              2
  57 #define RIPNG_ROUTE_REDISTRIBUTE         3
  58 #define RIPNG_ROUTE_INTERFACE            4
  59 #define RIPNG_ROUTE_AGGREGATE            5
  60
  61 /* Interface send/receive configuration. */
  62 #define RIPNG_SEND_UNSPEC                0
  63 #define RIPNG_SEND_OFF                   1
  64 #define RIPNG_RECEIVE_UNSPEC             0
  65 #define RIPNG_RECEIVE_OFF                1
  66
  67 /* RIP default route's accept/announce methods. */
  68 #define RIPNG_DEFAULT_ADVERTISE_UNSPEC   0
  69 #define RIPNG_DEFAULT_ADVERTISE_NONE     1
  70 #define RIPNG_DEFAULT_ADVERTISE          2
  71
  72 #define RIPNG_DEFAULT_ACCEPT_UNSPEC      0
  73 #define RIPNG_DEFAULT_ACCEPT_NONE        1
  74 #define RIPNG_DEFAULT_ACCEPT             2
  75
  76 /* For max RTE calculation. */
  77 #ifndef IPV6_HDRLEN
  78 #define IPV6_HDRLEN 40
  79 #endif /* IPV6_HDRLEN */
  80
  81 #ifndef IFMINMTU
  82 #define IFMINMTU    576
  83 #endif /* IFMINMTU */
  84
  85 /* YANG paths */
  86 #define RIPNG_INSTANCE  "/frr-ripngd:ripngd/instance"
  87 #define RIPNG_IFACE     "/frr-interface:lib/interface/frr-ripngd:ripng"
  88
  89 DECLARE_MGROUP(RIPNGD)
  90
  91 /* RIPng structure. */
  92 struct ripng {
  93         RB_ENTRY(ripng) entry;
  94
  95         /* VRF this routing instance is associated with. */
  96         char *vrf_name;
  97
  98         /* VRF backpointer (might be NULL if the VRF doesn't exist). */
  99         struct vrf *vrf;
 100
 101         /* Status of the routing instance. */
 102         bool enabled;
 103
 104         /* RIPng socket. */
 105         int sock;
 106
 107         /* RIPng Parameters.*/
 108         uint8_t command;
 109         uint8_t version;
 110         uint16_t update_time;
 111         uint16_t timeout_time;
 112         uint16_t garbage_time;
 113         int max_mtu;
 114         uint8_t default_metric;
 115
 116         /* Input/output buffer of RIPng. */
 117         struct stream *ibuf;
 118         struct stream *obuf;
 119
 120         /* RIPng routing information base. */
 121         struct agg_table *table;
 122
 123         /* Linked list of RIPng peers. */
 124         struct list *peer_list;
 125
 126         /* RIPng enabled interfaces. */
 127         vector enable_if;
 128
 129         /* RIPng enabled networks. */
 130         struct agg_table *enable_network;
 131
 132         /* Vector to store passive-interface name. */
 133         vector passive_interface;
 134
 135         /* RIPng offset-lists. */
 136         struct list *offset_list_master;
 137
 138         /* RIPng threads. */
 139         struct thread *t_read;
 140         struct thread *t_write;
 141         struct thread *t_update;
 142         struct thread *t_garbage;
 143         struct thread *t_zebra;
 144
 145         /* Triggered update hack. */
 146         int trigger;
 147         struct thread *t_triggered_update;
 148         struct thread *t_triggered_interval;
 149
 150         /* RIPng ECMP flag */
 151         bool ecmp;
 152
 153         /* RIPng redistribute configuration. */
 154         struct {
 155                 bool enabled;
 156                 struct {
 157                         char *name;
 158                         struct route_map *map;
 159                 } route_map;
 160                 bool metric_config;
 161                 uint8_t metric;
 162         } redist[ZEBRA_ROUTE_MAX];
 163
 164         /* For distribute-list container */
 165         struct distribute_ctx *distribute_ctx;
 166
 167         /* For if_rmap container */
 168         struct if_rmap_ctx *if_rmap_ctx;
 169 };
 170 RB_HEAD(ripng_instance_head, ripng);
 171 RB_PROTOTYPE(ripng_instance_head, ripng, entry, ripng_instance_compare)
 172
 173 /* Routing table entry. */
 174 struct rte {
 175         struct in6_addr addr; /* RIPng destination prefix */
 176         uint16_t tag;    /* RIPng tag */
 177         uint8_t prefixlen;    /* Length of the RIPng prefix */
 178         uint8_t metric;       /* Metric of the RIPng route */
 179                               /* The nexthop is stored by the structure
 180                                * ripng_nexthop within ripngd.c */
 181 };
 182
 183 /* RIPNG send packet. */
 184 struct ripng_packet {
 185         uint8_t command;
 186         uint8_t version;
 187         uint16_t zero;
 188         struct rte rte[1];
 189 };
 190
 191 /* Each route's information. */
 192 struct ripng_info {
 193         /* This route's type.  Static, ripng or aggregate. */
 194         uint8_t type;
 195
 196         /* Sub type for static route. */
 197         uint8_t sub_type;
 198
 199         /* RIPng specific information */
 200         struct in6_addr nexthop;
 201         struct in6_addr from;
 202
 203         /* Which interface does this route come from. */
 204         ifindex_t ifindex;
 205
 206         /* Metric of this route.  */
 207         uint8_t metric;
 208
 209         /* Tag field of RIPng packet.*/
 210         uint16_t tag;
 211
 212         /* For aggregation. */
 213         unsigned int suppress;
 214
 215 /* Flags of RIPng route. */
 216 #define RIPNG_RTF_FIB      1
 217 #define RIPNG_RTF_CHANGED  2
 218         uint8_t flags;
 219
 220         /* Garbage collect timer. */
 221         struct thread *t_timeout;
 222         struct thread *t_garbage_collect;
 223
 224         /* Route-map features - this variables can be changed. */
 225         struct in6_addr nexthop_out;
 226         uint8_t metric_set;
 227         uint8_t metric_out;
 228         uint16_t tag_out;
 229
 230         struct agg_node *rp;
 231 };
 232
 233 typedef enum {
 234         RIPNG_NO_SPLIT_HORIZON = 0,
 235         RIPNG_SPLIT_HORIZON,
 236         RIPNG_SPLIT_HORIZON_POISONED_REVERSE
 237 } split_horizon_policy_t;
 238
 239 /* RIPng specific interface configuration. */
 240 struct ripng_interface {
 241         /* Parent routing instance. */
 242         struct ripng *ripng;
 243
 244         /* RIPng is enabled on this interface. */
 245         int enable_network;
 246         int enable_interface;
 247
 248         /* RIPng is running on this interface. */
 249         int running;
 250
 251         /* Split horizon flag. */
 252         split_horizon_policy_t split_horizon;
 253
 254 /* For filter type slot. */
 255 #define RIPNG_FILTER_IN  0
 256 #define RIPNG_FILTER_OUT 1
 257 #define RIPNG_FILTER_MAX 2
 258
 259         /* Access-list. */
 260         struct access_list *list[RIPNG_FILTER_MAX];
 261
 262         /* Prefix-list. */
 263         struct prefix_list *prefix[RIPNG_FILTER_MAX];
 264
 265         /* Route-map. */
 266         struct route_map *routemap[RIPNG_FILTER_MAX];
 267
 268         /* Default information originate. */
 269         uint8_t default_originate;
 270
 271         /* Default information only. */
 272         uint8_t default_only;
 273
 274         /* Wake up thread. */
 275         struct thread *t_wakeup;
 276
 277         /* Passive interface. */
 278         int passive;
 279 };
 280
 281 /* RIPng peer information. */
 282 struct ripng_peer {
 283         /* Parent routing instance. */
 284         struct ripng *ripng;
 285
 286         /* Peer address. */
 287         struct in6_addr addr;
 288
 289         /* Peer RIPng tag value. */
 290         int domain;
 291
 292         /* Last update time. */
 293         time_t uptime;
 294
 295         /* Peer RIP version. */
 296         uint8_t version;
 297
 298         /* Statistics. */
 299         int recv_badpackets;
 300         int recv_badroutes;
 301
 302         /* Timeout thread. */
 303         struct thread *t_timeout;
 304 };
 305
 306 /* All RIPng events. */
 307 enum ripng_event {
 308         RIPNG_READ,
 309         RIPNG_ZEBRA,
 310         RIPNG_REQUEST_EVENT,
 311         RIPNG_UPDATE_EVENT,
 312         RIPNG_TRIGGERED_UPDATE,
 313 };
 314
 315 /* RIPng timer on/off macro. */
 316 #define RIPNG_TIMER_ON(T,F,V) thread_add_timer (master, (F), rinfo, (V), &(T))
 317
 318 #define RIPNG_TIMER_OFF(T)  thread_cancel(&(T))
 319
 320 #define RIPNG_OFFSET_LIST_IN  0
 321 #define RIPNG_OFFSET_LIST_OUT 1
 322 #define RIPNG_OFFSET_LIST_MAX 2
 323
 324 struct ripng_offset_list {
 325         /* Parent routing instance. */
 326         struct ripng *ripng;
 327
 328         char *ifname;
 329
 330         struct {
 331                 char *alist_name;
 332                 /* struct access_list *alist; */
 333                 uint8_t metric;
 334         } direct[RIPNG_OFFSET_LIST_MAX];
 335 };
 336
 337 /* Extern variables. */
 338 extern struct zebra_privs_t ripngd_privs;
 339 extern struct thread_master *master;
 340 extern struct ripng_instance_head ripng_instances;
 341
 342 /* Prototypes. */
 343 extern void ripng_init(void);
 344 extern void ripng_clean(struct ripng *ripng);
 345 extern void ripng_clean_network(struct ripng *ripng);
 346 extern void ripng_interface_clean(struct ripng *ripng);
 347 extern int ripng_enable_network_add(struct ripng *ripng, struct prefix *p);
 348 extern int ripng_enable_network_delete(struct ripng *ripng, struct prefix *p);
 349 extern int ripng_enable_if_add(struct ripng *ripng, const char *ifname);
 350 extern int ripng_enable_if_delete(struct ripng *ripng, const char *ifname);
 351 extern int ripng_passive_interface_set(struct ripng *ripng, const char *ifname);
 352 extern int ripng_passive_interface_unset(struct ripng *ripng,
 353                                          const char *ifname);
 354 extern void ripng_passive_interface_clean(struct ripng *ripng);
 355 extern void ripng_if_init(void);
 356 extern void ripng_route_map_init(void);
 357 extern void ripng_zebra_vrf_register(struct vrf *vrf);
 358 extern void ripng_zebra_vrf_deregister(struct vrf *vrf);
 359 extern void ripng_terminate(void);
 360 /* zclient_init() is done by ripng_zebra.c:zebra_init() */
 361 extern void zebra_init(struct thread_master *);
 362 extern void ripng_zebra_stop(void);
 363 extern void ripng_redistribute_conf_update(struct ripng *ripng, int type);
 364 extern void ripng_redistribute_conf_delete(struct ripng *ripng, int type);
 365
 366 extern void ripng_peer_update(struct ripng *ripng, struct sockaddr_in6 *from,
 367                               uint8_t version);
 368 extern void ripng_peer_bad_route(struct ripng *ripng,
 369                                  struct sockaddr_in6 *from);
 370 extern void ripng_peer_bad_packet(struct ripng *ripng,
 371                                   struct sockaddr_in6 *from);
 372 extern void ripng_peer_display(struct vty *vty, struct ripng *ripng);
 373 extern struct ripng_peer *ripng_peer_lookup(struct ripng *ripng,
 374                                             struct in6_addr *addr);
 375 extern struct ripng_peer *ripng_peer_lookup_next(struct ripng *ripng,
 376                                                  struct in6_addr *addr);
 377 extern int ripng_peer_list_cmp(struct ripng_peer *p1, struct ripng_peer *p2);
 378 extern void ripng_peer_list_del(void *arg);
 379
 380 extern struct ripng_offset_list *ripng_offset_list_new(struct ripng *ripng,
 381                                                        const char *ifname);
 382 extern void ripng_offset_list_del(struct ripng_offset_list *offset);
 383 extern void ripng_offset_list_free(struct ripng_offset_list *offset);
 384 extern struct ripng_offset_list *ripng_offset_list_lookup(struct ripng *ripng,
 385                                                           const char *ifname);
 386 extern int ripng_offset_list_apply_in(struct ripng *ripng,
 387                                       struct prefix_ipv6 *p,
 388                                       struct interface *ifp, uint8_t *metric);
 389 extern int ripng_offset_list_apply_out(struct ripng *ripng,
 390                                        struct prefix_ipv6 *p,
 391                                        struct interface *ifp, uint8_t *metric);
 392 extern int offset_list_cmp(struct ripng_offset_list *o1,
 393                            struct ripng_offset_list *o2);
 394
 395 extern int ripng_route_rte(struct ripng_info *rinfo);
 396 extern struct ripng_info *ripng_info_new(void);
 397 extern void ripng_info_free(struct ripng_info *rinfo);
 398 extern struct ripng *ripng_info_get_instance(const struct ripng_info *rinfo);
 399 extern void ripng_event(struct ripng *ripng, enum ripng_event event, int sock);
 400 extern int ripng_request(struct interface *ifp);
 401 extern void ripng_redistribute_add(struct ripng *ripng, int type, int sub_type,
 402                                    struct prefix_ipv6 *p, ifindex_t ifindex,
 403                                    struct in6_addr *nexthop, route_tag_t tag);
 404 extern void ripng_redistribute_delete(struct ripng *ripng, int type,
 405                                       int sub_type, struct prefix_ipv6 *p,
 406                                       ifindex_t ifindex);
 407 extern void ripng_redistribute_withdraw(struct ripng *ripng, int type);
 408
 409 extern void ripng_ecmp_disable(struct ripng *ripng);
 410 extern void ripng_distribute_update_interface(struct interface *);
 411 extern void ripng_if_rmap_update_interface(struct interface *);
 412
 413 extern void ripng_zebra_ipv6_add(struct ripng *ripng, struct agg_node *node);
 414 extern void ripng_zebra_ipv6_delete(struct ripng *ripng, struct agg_node *node);
 415
 416 extern void ripng_redistribute_enable(struct ripng *ripng);
 417 extern void ripng_redistribute_disable(struct ripng *ripng);
 418 extern int ripng_redistribute_check(struct ripng *ripng, int type);
 419 extern void ripng_redistribute_write(struct vty *vty, struct ripng *ripng);
 420
 421 extern int ripng_write_rte(int num, struct stream *s, struct prefix_ipv6 *p,
 422                            struct in6_addr *nexthop, uint16_t tag,
 423                            uint8_t metric);
 424 extern int ripng_send_packet(caddr_t buf, int bufsize, struct sockaddr_in6 *to,
 425                              struct interface *ifp);
 426
 427 extern void ripng_packet_dump(struct ripng_packet *packet, int size,
 428                               const char *sndrcv);
 429
 430 extern int ripng_interface_up(ZAPI_CALLBACK_ARGS);
 431 extern int ripng_interface_down(ZAPI_CALLBACK_ARGS);
 432 extern int ripng_interface_add(ZAPI_CALLBACK_ARGS);
 433 extern int ripng_interface_delete(ZAPI_CALLBACK_ARGS);
 434 extern int ripng_interface_address_add(ZAPI_CALLBACK_ARGS);
 435 extern int ripng_interface_address_delete(ZAPI_CALLBACK_ARGS);
 436 extern int ripng_interface_vrf_update(ZAPI_CALLBACK_ARGS);
 437 extern void ripng_interface_sync(struct interface *ifp);
 438
 439 extern struct ripng *ripng_lookup_by_vrf_id(vrf_id_t vrf_id);
 440 extern struct ripng *ripng_lookup_by_vrf_name(const char *vrf_name);
 441 extern struct ripng *ripng_create(const char *vrf_name, struct vrf *vrf,
 442                                   int socket);
 443 extern int ripng_make_socket(struct vrf *vrf);
 444 extern int ripng_network_write(struct vty *vty, struct ripng *ripng);
 445
 446 extern struct ripng_info *ripng_ecmp_add(struct ripng *ripng,
 447                                          struct ripng_info *rinfo);
 448 extern struct ripng_info *ripng_ecmp_replace(struct ripng *ripng,
 449                                              struct ripng_info *rinfo);
 450 extern struct ripng_info *ripng_ecmp_delete(struct ripng *ripng,
 451                                             struct ripng_info *rinfo);
 452
 453 extern void ripng_vrf_init(void);
 454 extern void ripng_vrf_terminate(void);
 455 extern void ripng_cli_init(void);
 456
 457 #endif /* _ZEBRA_RIPNG_RIPNGD_H */