ripd/ripd.h

   1 /* RIP related values and structures.
   2  * Copyright (C) 1997, 1998, 1999 Kunihiro Ishiguro <kunihiro@zebra.org>
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef _ZEBRA_RIP_H
  22 #define _ZEBRA_RIP_H
  23
  24 #include "hook.h"
  25 #include "nexthop.h"
  26 #include "rip_memory.h"
  27
  28 /* RIP version number. */
  29 #define RIPv1                            1
  30 #define RIPv2                            2
  31 /* N.B. stuff will break if
  32         (RIPv1 != RI_RIP_VERSION_1) || (RIPv2 != RI_RIP_VERSION_2) */
  33
  34
  35 /* RIP command list. */
  36 #define RIP_REQUEST                      1
  37 #define RIP_RESPONSE                     2
  38 #define RIP_TRACEON                      3      /* Obsolete */
  39 #define RIP_TRACEOFF                     4      /* Obsolete */
  40 #define RIP_POLL                         5
  41 #define RIP_POLL_ENTRY                   6
  42 #define RIP_COMMAND_MAX                  7
  43
  44 /* RIP metric infinity value.*/
  45 #define RIP_METRIC_INFINITY             16
  46
  47 /* Normal RIP packet min and max size. */
  48 #define RIP_PACKET_MINSIZ                4
  49 #define RIP_PACKET_MAXSIZ              512
  50
  51 #define RIP_HEADER_SIZE                  4
  52 #define RIP_RTE_SIZE                    20
  53
  54 /* Max count of routing table entry in one rip packet. */
  55 #define RIP_MAX_RTE   ((RIP_PACKET_MAXSIZ - RIP_HEADER_SIZE) / RIP_RTE_SIZE)
  56
  57 /* RIP version 2 multicast address. */
  58 #ifndef INADDR_RIP_GROUP
  59 #define INADDR_RIP_GROUP        0xe0000009    /* 224.0.0.9 */
  60 #endif
  61
  62 /* RIP peer timeout value. */
  63 #define RIP_PEER_TIMER_DEFAULT         180
  64
  65 /* RIP port number. */
  66 #define RIP_PORT_DEFAULT               520
  67 #define RIP_VTY_PORT                  2602
  68
  69 /* Default configuration file name. */
  70 #define RIPD_DEFAULT_CONFIG    "ripd.conf"
  71
  72 /* RIP route types. */
  73 #define RIP_ROUTE_RTE                    0
  74 #define RIP_ROUTE_STATIC                 1
  75 #define RIP_ROUTE_DEFAULT                2
  76 #define RIP_ROUTE_REDISTRIBUTE           3
  77 #define RIP_ROUTE_INTERFACE              4
  78
  79 /* RIPv2 special RTE family types */
  80 #define RIP_FAMILY_AUTH                  0xffff
  81
  82 /* RIPv2 authentication types, for RIP_FAMILY_AUTH RTE's */
  83 #define RIP_NO_AUTH                0
  84 #define RIP_AUTH_DATA              1
  85 #define RIP_AUTH_SIMPLE_PASSWORD   2
  86 #define RIP_AUTH_MD5               3
  87
  88 /* RIPv2 Simple authentication */
  89 #define RIP_AUTH_SIMPLE_SIZE            16
  90
  91 /* RIPv2 MD5 authentication. */
  92 #define RIP_AUTH_MD5_SIZE               16
  93 #define RIP_AUTH_MD5_COMPAT_SIZE        RIP_RTE_SIZE
  94
  95 /* YANG paths */
  96 #define RIP_INSTANCE    "/frr-ripd:ripd/instance"
  97 #define RIP_IFACE       "/frr-interface:lib/interface/frr-ripd:rip"
  98
  99 /* RIP structure. */
 100 struct rip {
 101         /* RIP socket. */
 102         int sock;
 103
 104         /* Default version of rip instance. */
 105         int version_send; /* version 1 or 2 (but not both) */
 106         int version_recv; /* version 1 or 2 or both */
 107
 108         /* Output buffer of RIP. */
 109         struct stream *obuf;
 110
 111         /* RIP routing information base. */
 112         struct route_table *table;
 113
 114         /* RIP neighbor. */
 115         struct route_table *neighbor;
 116
 117         /* RIP threads. */
 118         struct thread *t_read;
 119
 120         /* Update and garbage timer. */
 121         struct thread *t_update;
 122
 123         /* Triggered update hack. */
 124         int trigger;
 125         struct thread *t_triggered_update;
 126         struct thread *t_triggered_interval;
 127
 128         /* RIP timer values. */
 129         uint32_t update_time;
 130         uint32_t timeout_time;
 131         uint32_t garbage_time;
 132
 133         /* RIP default metric. */
 134         uint8_t default_metric;
 135
 136         /* RIP default distance. */
 137         uint8_t distance;
 138         struct route_table *distance_table;
 139
 140         /* RIP ECMP flag */
 141         bool ecmp;
 142
 143         /* Are we in passive-interface default mode? */
 144         bool passive_default;
 145
 146         /* For redistribute route map. */
 147         struct {
 148                 char *name;
 149                 struct route_map *map;
 150                 bool metric_config;
 151                 uint8_t metric;
 152         } route_map[ZEBRA_ROUTE_MAX];
 153 };
 154
 155 /* RIP routing table entry which belong to rip_packet. */
 156 struct rte {
 157         uint16_t family;        /* Address family of this route. */
 158         uint16_t tag;           /* Route Tag which included in RIP2 packet. */
 159         struct in_addr prefix;  /* Prefix of rip route. */
 160         struct in_addr mask;    /* Netmask of rip route. */
 161         struct in_addr nexthop; /* Next hop of rip route. */
 162         uint32_t metric;        /* Metric value of rip route. */
 163 };
 164
 165 /* RIP packet structure. */
 166 struct rip_packet {
 167         unsigned char command; /* Command type of RIP packet. */
 168         unsigned char version; /* RIP version which coming from peer. */
 169         unsigned char pad1;    /* Padding of RIP packet header. */
 170         unsigned char pad2;    /* Same as above. */
 171         struct rte rte[1];     /* Address structure. */
 172 };
 173
 174 /* Buffer to read RIP packet. */
 175 union rip_buf {
 176         struct rip_packet rip_packet;
 177         char buf[RIP_PACKET_MAXSIZ];
 178 };
 179
 180 /* RIP route information. */
 181 struct rip_info {
 182         /* This route's type. */
 183         int type;
 184
 185         /* Sub type. */
 186         int sub_type;
 187
 188         /* RIP nexthop. */
 189         struct nexthop nh;
 190         struct in_addr from;
 191
 192         /* Metric of this route. */
 193         uint32_t metric;
 194
 195         /* External metric of this route.
 196            if learnt from an externalm proto */
 197         uint32_t external_metric;
 198
 199         /* Tag information of this route. */
 200         uint16_t tag;
 201
 202 /* Flags of RIP route. */
 203 #define RIP_RTF_FIB      1
 204 #define RIP_RTF_CHANGED  2
 205         uint8_t flags;
 206
 207         /* Garbage collect timer. */
 208         struct thread *t_timeout;
 209         struct thread *t_garbage_collect;
 210
 211         /* Route-map futures - this variables can be changed. */
 212         struct in_addr nexthop_out;
 213         uint8_t metric_set;
 214         uint32_t metric_out;
 215         uint16_t tag_out;
 216         ifindex_t ifindex_out;
 217
 218         struct route_node *rp;
 219
 220         uint8_t distance;
 221
 222 #ifdef NEW_RIP_TABLE
 223         struct rip_info *next;
 224         struct rip_info *prev;
 225 #endif /* NEW_RIP_TABLE */
 226 };
 227
 228 typedef enum {
 229         RIP_NO_SPLIT_HORIZON = 0,
 230         RIP_SPLIT_HORIZON,
 231         RIP_SPLIT_HORIZON_POISONED_REVERSE
 232 } split_horizon_policy_t;
 233
 234 /* RIP specific interface configuration. */
 235 struct rip_interface {
 236         /* RIP is enabled on this interface. */
 237         int enable_network;
 238         int enable_interface;
 239
 240         /* RIP is running on this interface. */
 241         int running;
 242
 243         /* RIP version control. */
 244         int ri_send;
 245         int ri_receive;
 246
 247         /* RIPv2 broadcast mode */
 248         int v2_broadcast;
 249
 250         /* RIPv2 authentication type. */
 251         int auth_type;
 252
 253         /* RIPv2 authentication string. */
 254         char *auth_str;
 255
 256         /* RIPv2 authentication key chain. */
 257         char *key_chain;
 258
 259         /* value to use for md5->auth_len */
 260         uint8_t md5_auth_len;
 261
 262         /* Split horizon flag. */
 263         split_horizon_policy_t split_horizon;
 264         split_horizon_policy_t split_horizon_default;
 265
 266 /* For filter type slot. */
 267 #define RIP_FILTER_IN  0
 268 #define RIP_FILTER_OUT 1
 269 #define RIP_FILTER_MAX 2
 270
 271         /* Access-list. */
 272         struct access_list *list[RIP_FILTER_MAX];
 273
 274         /* Prefix-list. */
 275         struct prefix_list *prefix[RIP_FILTER_MAX];
 276
 277         /* Route-map. */
 278         struct route_map *routemap[RIP_FILTER_MAX];
 279
 280         /* Wake up thread. */
 281         struct thread *t_wakeup;
 282
 283         /* Interface statistics. */
 284         int recv_badpackets;
 285         int recv_badroutes;
 286         int sent_updates;
 287
 288         /* Passive interface. */
 289         int passive;
 290 };
 291
 292 /* RIP peer information. */
 293 struct rip_peer {
 294         /* Peer address. */
 295         struct in_addr addr;
 296
 297         /* Peer RIP tag value. */
 298         int domain;
 299
 300         /* Last update time. */
 301         time_t uptime;
 302
 303         /* Peer RIP version. */
 304         uint8_t version;
 305
 306         /* Statistics. */
 307         int recv_badpackets;
 308         int recv_badroutes;
 309
 310         /* Timeout thread. */
 311         struct thread *t_timeout;
 312 };
 313
 314 struct rip_distance {
 315         /* Distance value for the IP source prefix. */
 316         uint8_t distance;
 317
 318         /* Name of the access-list to be matched. */
 319         char *access_list;
 320 };
 321
 322 struct rip_md5_info {
 323         uint16_t family;
 324         uint16_t type;
 325         uint16_t packet_len;
 326         uint8_t keyid;
 327         uint8_t auth_len;
 328         uint32_t sequence;
 329         uint32_t reserv1;
 330         uint32_t reserv2;
 331 };
 332
 333 struct rip_md5_data {
 334         uint16_t family;
 335         uint16_t type;
 336         uint8_t digest[16];
 337 };
 338
 339 /* RIP accepet/announce methods. */
 340 #define RI_RIP_UNSPEC                      0
 341 #define RI_RIP_VERSION_1                   1
 342 #define RI_RIP_VERSION_2                   2
 343 #define RI_RIP_VERSION_1_AND_2             3
 344 #define RI_RIP_VERSION_NONE                4
 345 /* N.B. stuff will break if
 346         (RIPv1 != RI_RIP_VERSION_1) || (RIPv2 != RI_RIP_VERSION_2) */
 347
 348 /* RIP event. */
 349 enum rip_event {
 350         RIP_READ,
 351         RIP_UPDATE_EVENT,
 352         RIP_TRIGGERED_UPDATE,
 353 };
 354
 355 /* Macro for timer turn on. */
 356 #define RIP_TIMER_ON(T,F,V) thread_add_timer (master, (F), rinfo, (V), &(T))
 357
 358 /* Macro for timer turn off. */
 359 #define RIP_TIMER_OFF(X) THREAD_TIMER_OFF(X)
 360
 361 #define RIP_OFFSET_LIST_IN  0
 362 #define RIP_OFFSET_LIST_OUT 1
 363 #define RIP_OFFSET_LIST_MAX 2
 364
 365 struct rip_offset_list {
 366         char *ifname;
 367
 368         struct {
 369                 char *alist_name;
 370                 /* struct access_list *alist; */
 371                 uint8_t metric;
 372         } direct[RIP_OFFSET_LIST_MAX];
 373 };
 374
 375 /* Prototypes. */
 376 extern void rip_init(void);
 377 extern void rip_reset(void);
 378 extern void rip_clean(void);
 379 extern void rip_clean_network(void);
 380 extern void rip_interfaces_clean(void);
 381 extern void rip_interfaces_reset(void);
 382 extern int rip_passive_nondefault_set(const char *ifname);
 383 extern int rip_passive_nondefault_unset(const char *ifname);
 384 extern void rip_passive_nondefault_clean(void);
 385 extern void rip_if_init(void);
 386 extern void rip_if_down_all(void);
 387 extern void rip_route_map_init(void);
 388 extern void rip_route_map_reset(void);
 389 extern void rip_zclient_init(struct thread_master *);
 390 extern void rip_zclient_stop(void);
 391 extern void rip_zclient_reset(void);
 392 extern int if_check_address(struct in_addr addr);
 393 extern int rip_create(int socket);
 394
 395 extern int rip_request_send(struct sockaddr_in *, struct interface *, uint8_t,
 396                             struct connected *);
 397 extern int rip_neighbor_lookup(struct sockaddr_in *);
 398 extern int rip_neighbor_add(struct prefix_ipv4 *p);
 399 extern int rip_neighbor_delete(struct prefix_ipv4 *p);
 400
 401 extern int rip_enable_network_add(struct prefix *p);
 402 extern int rip_enable_network_delete(struct prefix *p);
 403 extern int rip_enable_if_add(const char *ifname);
 404 extern int rip_enable_if_delete(const char *ifname);
 405
 406 extern void rip_event(enum rip_event, int);
 407 extern void rip_ecmp_disable(void);
 408
 409 extern int rip_create_socket(void);
 410
 411 extern int rip_redistribute_check(int);
 412 extern void rip_redistribute_conf_update(int type);
 413 extern void rip_redistribute_conf_delete(int type);
 414 extern void rip_redistribute_add(int type, int sub_type, struct prefix_ipv4 *p,
 415                                  struct nexthop *nh, unsigned int metric,
 416                                  unsigned char distance, route_tag_t tag);
 417 extern void rip_redistribute_delete(int, int, struct prefix_ipv4 *, ifindex_t);
 418 extern void rip_redistribute_withdraw(int);
 419 extern void rip_zebra_ipv4_add(struct route_node *);
 420 extern void rip_zebra_ipv4_delete(struct route_node *);
 421 extern void rip_interface_multicast_set(int, struct connected *);
 422 extern void rip_distribute_update_interface(struct interface *);
 423 extern void rip_if_rmap_update_interface(struct interface *);
 424
 425 extern int rip_show_network_config(struct vty *);
 426 extern void rip_show_redistribute_config(struct vty *);
 427
 428 extern void rip_peer_init(void);
 429 extern void rip_peer_update(struct sockaddr_in *, uint8_t);
 430 extern void rip_peer_bad_route(struct sockaddr_in *);
 431 extern void rip_peer_bad_packet(struct sockaddr_in *);
 432 extern void rip_peer_display(struct vty *);
 433 extern struct rip_peer *rip_peer_lookup(struct in_addr *);
 434 extern struct rip_peer *rip_peer_lookup_next(struct in_addr *);
 435
 436 extern void rip_info_free(struct rip_info *);
 437 extern struct rip_distance *rip_distance_new(void);
 438 extern void rip_distance_free(struct rip_distance *rdistance);
 439 extern uint8_t rip_distance_apply(struct rip_info *);
 440 extern void rip_redistribute_clean(void);
 441
 442 extern struct rip_info *rip_ecmp_add(struct rip_info *);
 443 extern struct rip_info *rip_ecmp_replace(struct rip_info *);
 444 extern struct rip_info *rip_ecmp_delete(struct rip_info *);
 445
 446 extern struct rip_offset_list *rip_offset_list_new(const char *ifname);
 447 extern void offset_list_del(struct rip_offset_list *offset);
 448 extern struct rip_offset_list *rip_offset_list_lookup(const char *ifname);
 449 extern int rip_offset_list_apply_in(struct prefix_ipv4 *, struct interface *,
 450                                     uint32_t *);
 451 extern int rip_offset_list_apply_out(struct prefix_ipv4 *, struct interface *,
 452                                      uint32_t *);
 453 extern void rip_offset_init(void);
 454 extern void rip_offset_clean(void);
 455
 456 /* There is only one rip strucutre. */
 457 extern struct rip *rip;
 458
 459 extern struct zebra_privs_t ripd_privs;
 460
 461 /* Master thread strucutre. */
 462 extern struct thread_master *master;
 463
 464 /* RIP statistics for SNMP. */
 465 extern long rip_global_route_changes;
 466 extern long rip_global_queries;
 467
 468 DECLARE_HOOK(rip_ifaddr_add, (struct connected * ifc), (ifc))
 469 DECLARE_HOOK(rip_ifaddr_del, (struct connected * ifc), (ifc))
 470
 471 extern struct route_table *rip_distance_table;
 472 extern vector Vrip_passive_nondefault;
 473
 474 /* Northbound. */
 475 extern void rip_cli_init(void);
 476 extern const struct frr_yang_module_info frr_ripd_info;
 477
 478 #endif /* _ZEBRA_RIP_H */