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
17: * along with GNU Zebra; see the file COPYING. If not, write to the Free
18: * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
19: * 02111-1307, USA.
20: */
21:
22: #ifndef _ZEBRA_RIP_H
23: #define _ZEBRA_RIP_H
24:
25: /* RIP version number. */
26: #define RIPv1 1
27: #define RIPv2 2
28: /* N.B. stuff will break if
29: (RIPv1 != RI_RIP_VERSION_1) || (RIPv2 != RI_RIP_VERSION_2) */
30:
31:
32: /* RIP command list. */
33: #define RIP_REQUEST 1
34: #define RIP_RESPONSE 2
35: #define RIP_TRACEON 3 /* Obsolete */
36: #define RIP_TRACEOFF 4 /* Obsolete */
37: #define RIP_POLL 5
38: #define RIP_POLL_ENTRY 6
39: #define RIP_COMMAND_MAX 7
40:
41: /* RIP metric infinity value.*/
42: #define RIP_METRIC_INFINITY 16
43:
44: /* Normal RIP packet min and max size. */
45: #define RIP_PACKET_MINSIZ 4
46: #define RIP_PACKET_MAXSIZ 512
47:
48: #define RIP_HEADER_SIZE 4
49: #define RIP_RTE_SIZE 20
50:
51: /* Max count of routing table entry in one rip packet. */
52: #define RIP_MAX_RTE 25
53:
54: /* RIP version 2 multicast address. */
55: #ifndef INADDR_RIP_GROUP
56: #define INADDR_RIP_GROUP 0xe0000009 /* 224.0.0.9 */
57: #endif
58:
59: /* RIP timers */
60: #define RIP_UPDATE_TIMER_DEFAULT 30
61: #define RIP_TIMEOUT_TIMER_DEFAULT 180
62: #define RIP_GARBAGE_TIMER_DEFAULT 120
63:
64: /* RIP peer timeout value. */
65: #define RIP_PEER_TIMER_DEFAULT 180
66:
67: /* RIP port number. */
68: #define RIP_PORT_DEFAULT 520
69: #define RIP_VTY_PORT 2602
70:
71: /* Default configuration file name. */
72: #define RIPD_DEFAULT_CONFIG "ripd.conf"
73:
74: /* RIP route types. */
75: #define RIP_ROUTE_RTE 0
76: #define RIP_ROUTE_STATIC 1
77: #define RIP_ROUTE_DEFAULT 2
78: #define RIP_ROUTE_REDISTRIBUTE 3
79: #define RIP_ROUTE_INTERFACE 4
80:
81: /* RIPv2 special RTE family types */
82: #define RIP_FAMILY_AUTH 0xffff
83:
84: /* RIPv2 authentication types, for RIP_FAMILY_AUTH RTE's */
85: #define RIP_NO_AUTH 0
86: #define RIP_AUTH_DATA 1
87: #define RIP_AUTH_SIMPLE_PASSWORD 2
88: #define RIP_AUTH_MD5 3
89:
90: /* RIPv2 Simple authentication */
91: #define RIP_AUTH_SIMPLE_SIZE 16
92:
93: /* RIPv2 MD5 authentication. */
94: #define RIP_AUTH_MD5_SIZE 16
95: #define RIP_AUTH_MD5_COMPAT_SIZE RIP_RTE_SIZE
96:
97: /* RIP structure. */
98: struct rip
99: {
100: /* RIP socket. */
101: int sock;
102:
103: /* Default version of rip instance. */
104: int version_send; /* version 1 or 2 (but not both) */
105: int version_recv; /* version 1 or 2 or both */
106:
107: /* Output buffer of RIP. */
108: struct stream *obuf;
109:
110: /* RIP routing information base. */
111: struct route_table *table;
112:
113: /* RIP only static routing information. */
114: struct route_table *route;
115:
116: /* RIP neighbor. */
117: struct route_table *neighbor;
118:
119: /* RIP threads. */
120: struct thread *t_read;
121:
122: /* Update and garbage timer. */
123: struct thread *t_update;
124:
125: /* Triggered update hack. */
126: int trigger;
127: struct thread *t_triggered_update;
128: struct thread *t_triggered_interval;
129:
130: /* RIP timer values. */
131: unsigned long update_time;
132: unsigned long timeout_time;
133: unsigned long garbage_time;
134:
135: /* RIP default metric. */
136: int default_metric;
137:
138: /* RIP default-information originate. */
139: u_char default_information;
140: char *default_information_route_map;
141:
142: /* RIP default distance. */
143: u_char distance;
144: struct route_table *distance_table;
145:
146: /* For redistribute route map. */
147: struct
148: {
149: char *name;
150: struct route_map *map;
151: int metric_config;
152: u_int32_t metric;
153: } route_map[ZEBRA_ROUTE_MAX];
154: };
155:
156: /* RIP routing table entry which belong to rip_packet. */
157: struct rte
158: {
159: u_int16_t family; /* Address family of this route. */
160: u_int16_t tag; /* Route Tag which included in RIP2 packet. */
161: struct in_addr prefix; /* Prefix of rip route. */
162: struct in_addr mask; /* Netmask of rip route. */
163: struct in_addr nexthop; /* Next hop of rip route. */
164: u_int32_t metric; /* Metric value of rip route. */
165: };
166:
167: /* RIP packet structure. */
168: struct rip_packet
169: {
170: unsigned char command; /* Command type of RIP packet. */
171: unsigned char version; /* RIP version which coming from peer. */
172: unsigned char pad1; /* Padding of RIP packet header. */
173: unsigned char pad2; /* Same as above. */
174: struct rte rte[1]; /* Address structure. */
175: };
176:
177: /* Buffer to read RIP packet. */
178: union rip_buf
179: {
180: struct rip_packet rip_packet;
181: char buf[RIP_PACKET_MAXSIZ];
182: };
183:
184: /* RIP route information. */
185: struct rip_info
186: {
187: /* This route's type. */
188: int type;
189:
190: /* Sub type. */
191: int sub_type;
192:
193: /* RIP nexthop. */
194: struct in_addr nexthop;
195: struct in_addr from;
196:
197: /* Which interface does this route come from. */
198: unsigned int ifindex;
199:
200: /* Metric of this route. */
201: u_int32_t metric;
202:
203: /* External metric of this route.
204: if learnt from an externalm proto */
205: u_int32_t external_metric;
206:
207: /* Tag information of this route. */
208: u_int16_t tag;
209:
210: /* Flags of RIP route. */
211: #define RIP_RTF_FIB 1
212: #define RIP_RTF_CHANGED 2
213: u_char flags;
214:
215: /* Garbage collect timer. */
216: struct thread *t_timeout;
217: struct thread *t_garbage_collect;
218:
219: /* Route-map futures - this variables can be changed. */
220: struct in_addr nexthop_out;
221: u_char metric_set;
222: u_int32_t metric_out;
223: u_short tag_out;
224: unsigned int ifindex_out;
225:
226: struct route_node *rp;
227:
228: u_char distance;
229:
230: #ifdef NEW_RIP_TABLE
231: struct rip_info *next;
232: struct rip_info *prev;
233: #endif /* NEW_RIP_TABLE */
234: };
235:
236: typedef enum {
237: RIP_NO_SPLIT_HORIZON = 0,
238: RIP_SPLIT_HORIZON,
239: RIP_SPLIT_HORIZON_POISONED_REVERSE
240: } split_horizon_policy_t;
241:
242: /* RIP specific interface configuration. */
243: struct rip_interface
244: {
245: /* RIP is enabled on this interface. */
246: int enable_network;
247: int enable_interface;
248:
249: /* RIP is running on this interface. */
250: int running;
251:
252: /* RIP version control. */
253: int ri_send;
254: int ri_receive;
255:
256: /* RIPv2 authentication type. */
257: int auth_type;
258:
259: /* RIPv2 authentication string. */
260: char *auth_str;
261:
262: /* RIPv2 authentication key chain. */
263: char *key_chain;
264:
265: /* value to use for md5->auth_len */
266: u_int8_t md5_auth_len;
267:
268: /* Split horizon flag. */
269: split_horizon_policy_t split_horizon;
270: split_horizon_policy_t split_horizon_default;
271:
272: /* For filter type slot. */
273: #define RIP_FILTER_IN 0
274: #define RIP_FILTER_OUT 1
275: #define RIP_FILTER_MAX 2
276:
277: /* Access-list. */
278: struct access_list *list[RIP_FILTER_MAX];
279:
280: /* Prefix-list. */
281: struct prefix_list *prefix[RIP_FILTER_MAX];
282:
283: /* Route-map. */
284: struct route_map *routemap[RIP_FILTER_MAX];
285:
286: /* Wake up thread. */
287: struct thread *t_wakeup;
288:
289: /* Interface statistics. */
290: int recv_badpackets;
291: int recv_badroutes;
292: int sent_updates;
293:
294: /* Passive interface. */
295: int passive;
296: };
297:
298: /* RIP peer information. */
299: struct rip_peer
300: {
301: /* Peer address. */
302: struct in_addr addr;
303:
304: /* Peer RIP tag value. */
305: int domain;
306:
307: /* Last update time. */
308: time_t uptime;
309:
310: /* Peer RIP version. */
311: u_char version;
312:
313: /* Statistics. */
314: int recv_badpackets;
315: int recv_badroutes;
316:
317: /* Timeout thread. */
318: struct thread *t_timeout;
319: };
320:
321: struct rip_md5_info
322: {
323: u_int16_t family;
324: u_int16_t type;
325: u_int16_t packet_len;
326: u_char keyid;
327: u_char auth_len;
328: u_int32_t sequence;
329: u_int32_t reserv1;
330: u_int32_t reserv2;
331: };
332:
333: struct rip_md5_data
334: {
335: u_int16_t family;
336: u_int16_t type;
337: u_char digest[16];
338: };
339:
340: /* RIP accepet/announce methods. */
341: #define RI_RIP_UNSPEC 0
342: #define RI_RIP_VERSION_1 1
343: #define RI_RIP_VERSION_2 2
344: #define RI_RIP_VERSION_1_AND_2 3
345: /* N.B. stuff will break if
346: (RIPv1 != RI_RIP_VERSION_1) || (RIPv2 != RI_RIP_VERSION_2) */
347:
348: /* Default value for "default-metric" command. */
349: #define RIP_DEFAULT_METRIC_DEFAULT 1
350:
351: /* RIP event. */
352: enum rip_event
353: {
354: RIP_READ,
355: RIP_UPDATE_EVENT,
356: RIP_TRIGGERED_UPDATE,
357: };
358:
359: /* Macro for timer turn on. */
360: #define RIP_TIMER_ON(T,F,V) \
361: do { \
362: if (!(T)) \
363: (T) = thread_add_timer (master, (F), rinfo, (V)); \
364: } while (0)
365:
366: /* Macro for timer turn off. */
367: #define RIP_TIMER_OFF(X) \
368: do { \
369: if (X) \
370: { \
371: thread_cancel (X); \
372: (X) = NULL; \
373: } \
374: } while (0)
375:
376: /* Prototypes. */
377: extern void rip_init (void);
378: extern void rip_reset (void);
379: extern void rip_clean (void);
380: extern void rip_clean_network (void);
381: extern void rip_interface_clean (void);
382: extern void rip_interface_reset (void);
383: extern void rip_passive_nondefault_clean (void);
384: extern void rip_if_init (void);
385: extern void rip_if_down_all (void);
386: extern void rip_route_map_init (void);
387: extern void rip_route_map_reset (void);
388: extern void rip_snmp_init (void);
389: extern void rip_zclient_init (void);
390: extern void rip_zclient_start (void);
391: extern void rip_zclient_reset (void);
392: extern void rip_offset_init (void);
393: extern int if_check_address (struct in_addr addr);
394:
395: extern int rip_request_send (struct sockaddr_in *, struct interface *, u_char,
396: struct connected *);
397: extern int rip_neighbor_lookup (struct sockaddr_in *);
398:
399: extern int rip_redistribute_check (int);
400: extern void rip_redistribute_add (int, int, struct prefix_ipv4 *, unsigned int,
401: struct in_addr *, unsigned int, unsigned char);
402: extern void rip_redistribute_delete (int, int, struct prefix_ipv4 *, unsigned int);
403: extern void rip_redistribute_withdraw (int);
404: extern void rip_zebra_ipv4_add (struct prefix_ipv4 *, struct in_addr *, u_int32_t, u_char);
405: extern void rip_zebra_ipv4_delete (struct prefix_ipv4 *, struct in_addr *, u_int32_t);
406: extern void rip_interface_multicast_set (int, struct connected *);
407: extern void rip_distribute_update_interface (struct interface *);
408: extern void rip_if_rmap_update_interface (struct interface *);
409:
410: extern int config_write_rip_network (struct vty *, int);
411: extern int config_write_rip_offset_list (struct vty *);
412: extern int config_write_rip_redistribute (struct vty *, int);
413:
414: extern void rip_peer_init (void);
415: extern void rip_peer_update (struct sockaddr_in *, u_char);
416: extern void rip_peer_bad_route (struct sockaddr_in *);
417: extern void rip_peer_bad_packet (struct sockaddr_in *);
418: extern void rip_peer_display (struct vty *);
419: extern struct rip_peer *rip_peer_lookup (struct in_addr *);
420: extern struct rip_peer *rip_peer_lookup_next (struct in_addr *);
421:
422: extern int rip_offset_list_apply_in (struct prefix_ipv4 *, struct interface *, u_int32_t *);
423: extern int rip_offset_list_apply_out (struct prefix_ipv4 *, struct interface *, u_int32_t *);
424: extern void rip_offset_clean (void);
425:
426: extern void rip_info_free (struct rip_info *);
427: extern u_char rip_distance_apply (struct rip_info *);
428: extern void rip_redistribute_clean (void);
429: extern void rip_ifaddr_add (struct interface *, struct connected *);
430: extern void rip_ifaddr_delete (struct interface *, struct connected *);
431:
432: /* There is only one rip strucutre. */
433: extern struct rip *rip;
434:
435: /* Master thread strucutre. */
436: extern struct thread_master *master;
437:
438: /* RIP statistics for SNMP. */
439: extern long rip_global_route_changes;
440: extern long rip_global_queries;
441: #endif /* _ZEBRA_RIP_H */
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