Annotation of embedaddon/quagga/ospfd/ospf_asbr.c, revision 1.1.1.3
1.1 misho 1: /*
2: * OSPF AS Boundary Router functions.
3: * Copyright (C) 1999, 2000 Kunihiro Ishiguro, Toshiaki Takada
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: #include <zebra.h>
24:
25: #include "thread.h"
26: #include "memory.h"
27: #include "linklist.h"
28: #include "prefix.h"
29: #include "if.h"
30: #include "table.h"
31: #include "vty.h"
32: #include "filter.h"
33: #include "log.h"
34:
35: #include "ospfd/ospfd.h"
36: #include "ospfd/ospf_interface.h"
37: #include "ospfd/ospf_asbr.h"
38: #include "ospfd/ospf_lsa.h"
39: #include "ospfd/ospf_lsdb.h"
40: #include "ospfd/ospf_neighbor.h"
41: #include "ospfd/ospf_spf.h"
42: #include "ospfd/ospf_flood.h"
43: #include "ospfd/ospf_route.h"
44: #include "ospfd/ospf_zebra.h"
45: #include "ospfd/ospf_dump.h"
46:
1.1.1.3 ! misho 47:
1.1 misho 48: /* Remove external route. */
49: void
50: ospf_external_route_remove (struct ospf *ospf, struct prefix_ipv4 *p)
51: {
52: struct route_node *rn;
53: struct ospf_route *or;
54:
55: rn = route_node_lookup (ospf->old_external_route, (struct prefix *) p);
56: if (rn)
57: if ((or = rn->info))
58: {
59: zlog_info ("Route[%s/%d]: external path deleted",
60: inet_ntoa (p->prefix), p->prefixlen);
61:
62: /* Remove route from zebra. */
63: if (or->type == OSPF_DESTINATION_NETWORK)
64: ospf_zebra_delete ((struct prefix_ipv4 *) &rn->p, or);
65:
66: ospf_route_free (or);
67: rn->info = NULL;
68:
69: route_unlock_node (rn);
70: route_unlock_node (rn);
71: return;
72: }
73:
74: zlog_info ("Route[%s/%d]: no such external path",
75: inet_ntoa (p->prefix), p->prefixlen);
76: }
77:
78: /* Lookup external route. */
79: struct ospf_route *
80: ospf_external_route_lookup (struct ospf *ospf,
81: struct prefix_ipv4 *p)
82: {
83: struct route_node *rn;
84:
85: rn = route_node_lookup (ospf->old_external_route, (struct prefix *) p);
86: if (rn)
87: {
88: route_unlock_node (rn);
89: if (rn->info)
90: return rn->info;
91: }
92:
93: zlog_warn ("Route[%s/%d]: lookup, no such prefix",
94: inet_ntoa (p->prefix), p->prefixlen);
95:
96: return NULL;
97: }
98:
1.1.1.3 ! misho 99:
1.1 misho 100: /* Add an External info for AS-external-LSA. */
101: struct external_info *
102: ospf_external_info_new (u_char type)
103: {
104: struct external_info *new;
105:
106: new = (struct external_info *)
107: XCALLOC (MTYPE_OSPF_EXTERNAL_INFO, sizeof (struct external_info));
108: new->type = type;
109:
110: ospf_reset_route_map_set_values (&new->route_map_set);
111: return new;
112: }
113:
114: static void
115: ospf_external_info_free (struct external_info *ei)
116: {
117: XFREE (MTYPE_OSPF_EXTERNAL_INFO, ei);
118: }
119:
120: void
121: ospf_reset_route_map_set_values (struct route_map_set_values *values)
122: {
123: values->metric = -1;
124: values->metric_type = -1;
1.1.1.3 ! misho 125: values->nexthop.s_addr = -1;
1.1 misho 126: }
127:
128: int
129: ospf_route_map_set_compare (struct route_map_set_values *values1,
130: struct route_map_set_values *values2)
131: {
132: return values1->metric == values2->metric &&
133: values1->metric_type == values2->metric_type;
134: }
135:
136: /* Add an External info for AS-external-LSA. */
137: struct external_info *
138: ospf_external_info_add (u_char type, struct prefix_ipv4 p,
1.1.1.3 ! misho 139: ifindex_t ifindex, struct in_addr nexthop)
1.1 misho 140: {
141: struct external_info *new;
142: struct route_node *rn;
143:
144: /* Initialize route table. */
145: if (EXTERNAL_INFO (type) == NULL)
146: EXTERNAL_INFO (type) = route_table_init ();
147:
148: rn = route_node_get (EXTERNAL_INFO (type), (struct prefix *) &p);
149: /* If old info exists, -- discard new one or overwrite with new one? */
150: if (rn)
151: if (rn->info)
152: {
153: route_unlock_node (rn);
154: zlog_warn ("Redistribute[%s]: %s/%d already exists, discard.",
155: ospf_redist_string(type),
156: inet_ntoa (p.prefix), p.prefixlen);
157: /* XFREE (MTYPE_OSPF_TMP, rn->info); */
158: return rn->info;
159: }
160:
161: /* Create new External info instance. */
162: new = ospf_external_info_new (type);
163: new->p = p;
164: new->ifindex = ifindex;
165: new->nexthop = nexthop;
166: new->tag = 0;
167:
1.1.1.3 ! misho 168: if (rn)
! 169: rn->info = new;
1.1 misho 170:
171: if (IS_DEBUG_OSPF (lsa, LSA_GENERATE))
172: zlog_debug ("Redistribute[%s]: %s/%d external info created.",
173: ospf_redist_string(type),
174: inet_ntoa (p.prefix), p.prefixlen);
175: return new;
176: }
177:
178: void
179: ospf_external_info_delete (u_char type, struct prefix_ipv4 p)
180: {
181: struct route_node *rn;
182:
183: rn = route_node_lookup (EXTERNAL_INFO (type), (struct prefix *) &p);
184: if (rn)
185: {
186: ospf_external_info_free (rn->info);
187: rn->info = NULL;
188: route_unlock_node (rn);
189: route_unlock_node (rn);
190: }
191: }
192:
193: struct external_info *
194: ospf_external_info_lookup (u_char type, struct prefix_ipv4 *p)
195: {
196: struct route_node *rn;
197: rn = route_node_lookup (EXTERNAL_INFO (type), (struct prefix *) p);
198: if (rn)
199: {
200: route_unlock_node (rn);
201: if (rn->info)
202: return rn->info;
203: }
204:
205: return NULL;
206: }
207:
208: struct ospf_lsa *
209: ospf_external_info_find_lsa (struct ospf *ospf,
210: struct prefix_ipv4 *p)
211: {
212: struct ospf_lsa *lsa;
213: struct as_external_lsa *al;
214: struct in_addr mask, id;
215:
216: lsa = ospf_lsdb_lookup_by_id (ospf->lsdb, OSPF_AS_EXTERNAL_LSA,
217: p->prefix, ospf->router_id);
218:
219: if (!lsa)
220: return NULL;
221:
222: al = (struct as_external_lsa *) lsa->data;
223:
224: masklen2ip (p->prefixlen, &mask);
225:
226: if (mask.s_addr != al->mask.s_addr)
227: {
228: id.s_addr = p->prefix.s_addr | (~mask.s_addr);
229: lsa = ospf_lsdb_lookup_by_id (ospf->lsdb, OSPF_AS_EXTERNAL_LSA,
230: id, ospf->router_id);
231: if (!lsa)
232: return NULL;
233: }
234:
235: return lsa;
236: }
237:
1.1.1.3 ! misho 238:
1.1 misho 239: /* Update ASBR status. */
240: void
241: ospf_asbr_status_update (struct ospf *ospf, u_char status)
242: {
243: zlog_info ("ASBR[Status:%d]: Update", status);
244:
245: /* ASBR on. */
246: if (status)
247: {
248: /* Already ASBR. */
249: if (IS_OSPF_ASBR (ospf))
250: {
251: zlog_info ("ASBR[Status:%d]: Already ASBR", status);
252: return;
253: }
254: SET_FLAG (ospf->flags, OSPF_FLAG_ASBR);
255: }
256: else
257: {
258: /* Already non ASBR. */
259: if (! IS_OSPF_ASBR (ospf))
260: {
261: zlog_info ("ASBR[Status:%d]: Already non ASBR", status);
262: return;
263: }
264: UNSET_FLAG (ospf->flags, OSPF_FLAG_ASBR);
265: }
266:
267: /* Transition from/to status ASBR, schedule timer. */
1.1.1.3 ! misho 268: ospf_spf_calculate_schedule (ospf, SPF_FLAG_ASBR_STATUS_CHANGE);
1.1 misho 269: ospf_router_lsa_update (ospf);
270: }
271:
272: void
273: ospf_redistribute_withdraw (struct ospf *ospf, u_char type)
274: {
275: struct route_node *rn;
276: struct external_info *ei;
277:
278: /* Delete external info for specified type. */
279: if (EXTERNAL_INFO (type))
280: for (rn = route_top (EXTERNAL_INFO (type)); rn; rn = route_next (rn))
281: if ((ei = rn->info))
282: if (ospf_external_info_find_lsa (ospf, &ei->p))
283: {
284: if (is_prefix_default (&ei->p) &&
285: ospf->default_originate != DEFAULT_ORIGINATE_NONE)
286: continue;
287: ospf_external_lsa_flush (ospf, type, &ei->p,
288: ei->ifindex /*, ei->nexthop */);
1.1.1.2 misho 289:
290: ospf_external_info_free (ei);
291: route_unlock_node (rn);
292: rn->info = NULL;
1.1 misho 293: }
294: }
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