1: /*
2: * OSPF Interface functions.
3: * Copyright (C) 1999 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
8: * it under the terms of the GNU General Public License as published
9: * by the Free Software Foundation; either version 2, or (at your
10: * option) any 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
19: * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20: * Boston, MA 02111-1307, USA.
21: */
22:
23: #ifndef _ZEBRA_OSPF_INTERFACE_H
24: #define _ZEBRA_OSPF_INTERFACE_H
25:
26: #include "ospfd/ospf_packet.h"
27: #include "ospfd/ospf_spf.h"
28:
29: #define IF_OSPF_IF_INFO(I) ((struct ospf_if_info *)((I)->info))
30: #define IF_DEF_PARAMS(I) (IF_OSPF_IF_INFO (I)->def_params)
31: #define IF_OIFS(I) (IF_OSPF_IF_INFO (I)->oifs)
32: #define IF_OIFS_PARAMS(I) (IF_OSPF_IF_INFO (I)->params)
33:
34: #define OSPF_IF_PARAM_CONFIGURED(S, P) ((S) && (S)->P##__config)
35: #define OSPF_IF_PARAM(O, P) \
36: (OSPF_IF_PARAM_CONFIGURED ((O)->params, P)?\
37: (O)->params->P:IF_DEF_PARAMS((O)->ifp)->P)
38:
39: #define DECLARE_IF_PARAM(T, P) T P; u_char P##__config:1
40: #define UNSET_IF_PARAM(S, P) ((S)->P##__config) = 0
41: #define SET_IF_PARAM(S, P) ((S)->P##__config) = 1
42:
43: struct ospf_if_params
44: {
45: DECLARE_IF_PARAM (u_int32_t, transmit_delay); /* Interface Transmisson Delay */
46: DECLARE_IF_PARAM (u_int32_t, output_cost_cmd);/* Command Interface Output Cost */
47: DECLARE_IF_PARAM (u_int32_t, retransmit_interval); /* Retransmission Interval */
48: DECLARE_IF_PARAM (u_char, passive_interface); /* OSPF Interface is passive: no sending or receiving (no need to join multicast groups) */
49: DECLARE_IF_PARAM (u_char, priority); /* OSPF Interface priority */
50: DECLARE_IF_PARAM (u_char, type); /* type of interface */
51: #define OSPF_IF_ACTIVE 0
52: #define OSPF_IF_PASSIVE 1
53:
54: #define OSPF_IF_PASSIVE_STATUS(O) \
55: (OSPF_IF_PARAM_CONFIGURED((O)->params, passive_interface) ? \
56: (O)->params->passive_interface : \
57: (OSPF_IF_PARAM_CONFIGURED(IF_DEF_PARAMS((O)->ifp), passive_interface) ? \
58: IF_DEF_PARAMS((O)->ifp)->passive_interface : \
59: (O)->ospf->passive_interface_default))
60:
61: DECLARE_IF_PARAM (u_int32_t, v_hello); /* Hello Interval */
62: DECLARE_IF_PARAM (u_int32_t, v_wait); /* Router Dead Interval */
63:
64: /* MTU mismatch check (see RFC2328, chap 10.6) */
65: DECLARE_IF_PARAM (u_char, mtu_ignore);
66:
67: /* Fast-Hellos */
68: DECLARE_IF_PARAM (u_char, fast_hello);
69:
70: /* Authentication data. */
71: u_char auth_simple[OSPF_AUTH_SIMPLE_SIZE + 1]; /* Simple password. */
72: u_char auth_simple__config:1;
73:
74: DECLARE_IF_PARAM (struct list *, auth_crypt); /* List of Auth cryptographic data. */
75: DECLARE_IF_PARAM (int, auth_type); /* OSPF authentication type */
76:
77: /* Other, non-configuration state */
78: u_int32_t network_lsa_seqnum; /* Network LSA seqnum */
79: };
80:
81: enum
82: {
83: MEMBER_ALLROUTERS = 0,
84: MEMBER_DROUTERS,
85: MEMBER_MAX,
86: };
87:
88: struct ospf_if_info
89: {
90: struct ospf_if_params *def_params;
91: struct route_table *params;
92: struct route_table *oifs;
93: unsigned int membership_counts[MEMBER_MAX]; /* multicast group refcnts */
94: };
95:
96: struct ospf_interface;
97:
98: struct ospf_vl_data
99: {
100: struct in_addr vl_peer; /* Router-ID of the peer for VLs. */
101: struct in_addr vl_area_id; /* Transit area for this VL. */
102: int format; /* area ID format */
103: struct ospf_interface *vl_oi; /* Interface data structure for the VL. */
104: struct vertex_nexthop nexthop; /* Nexthop router and oi to use */
105: struct in_addr peer_addr; /* Address used to reach the peer. */
106: u_char flags;
107: };
108:
109:
110: #define OSPF_VL_MAX_COUNT 256
111: #define OSPF_VL_MTU 1500
112:
113: #define OSPF_VL_FLAG_APPROVED 0x01
114:
115: struct crypt_key
116: {
117: u_char key_id;
118: u_char auth_key[OSPF_AUTH_MD5_SIZE + 1];
119: };
120:
121: /* OSPF interface structure. */
122: struct ospf_interface
123: {
124: /* This interface's parent ospf instance. */
125: struct ospf *ospf;
126:
127: /* OSPF Area. */
128: struct ospf_area *area;
129:
130: /* Position range in Router LSA */
131: uint16_t lsa_pos_beg; /* inclusive, >= */
132: uint16_t lsa_pos_end; /* exclusive, < */
133:
134: /* Interface data from zebra. */
135: struct interface *ifp;
136: struct ospf_vl_data *vl_data; /* Data for Virtual Link */
137:
138: /* Packet send buffer. */
139: struct ospf_fifo *obuf; /* Output queue */
140:
141: /* OSPF Network Type. */
142: u_char type;
143: #define OSPF_IFTYPE_NONE 0
144: #define OSPF_IFTYPE_POINTOPOINT 1
145: #define OSPF_IFTYPE_BROADCAST 2
146: #define OSPF_IFTYPE_NBMA 3
147: #define OSPF_IFTYPE_POINTOMULTIPOINT 4
148: #define OSPF_IFTYPE_VIRTUALLINK 5
149: #define OSPF_IFTYPE_LOOPBACK 6
150: #define OSPF_IFTYPE_MAX 7
151:
152: /* State of Interface State Machine. */
153: u_char state;
154:
155: /* To which multicast groups do we currently belong? */
156: u_char multicast_memberships;
157: #define OI_MEMBER_FLAG(M) (1 << (M))
158: #define OI_MEMBER_COUNT(O,M) (IF_OSPF_IF_INFO(oi->ifp)->membership_counts[(M)])
159: #define OI_MEMBER_CHECK(O,M) \
160: (CHECK_FLAG((O)->multicast_memberships, OI_MEMBER_FLAG(M)))
161: #define OI_MEMBER_JOINED(O,M) \
162: do { \
163: SET_FLAG ((O)->multicast_memberships, OI_MEMBER_FLAG(M)); \
164: IF_OSPF_IF_INFO((O)->ifp)->membership_counts[(M)]++; \
165: } while (0)
166: #define OI_MEMBER_LEFT(O,M) \
167: do { \
168: UNSET_FLAG ((O)->multicast_memberships, OI_MEMBER_FLAG(M)); \
169: IF_OSPF_IF_INFO((O)->ifp)->membership_counts[(M)]--; \
170: } while (0)
171:
172: struct prefix *address; /* Interface prefix */
173: struct connected *connected; /* Pointer to connected */
174:
175: /* Configured varables. */
176: struct ospf_if_params *params;
177:
178: u_int32_t crypt_seqnum; /* Cryptographic Sequence Number */
179: u_int32_t output_cost; /* Acutual Interface Output Cost */
180:
181: /* Neighbor information. */
182: struct route_table *nbrs; /* OSPF Neighbor List */
183: struct ospf_neighbor *nbr_self; /* Neighbor Self */
184: #define DR(I) ((I)->nbr_self->d_router)
185: #define BDR(I) ((I)->nbr_self->bd_router)
186: #define OPTIONS(I) ((I)->nbr_self->options)
187: #define PRIORITY(I) ((I)->nbr_self->priority)
188:
189: /* List of configured NBMA neighbor. */
190: struct list *nbr_nbma;
191:
192: /* self-originated LSAs. */
193: struct ospf_lsa *network_lsa_self; /* network-LSA. */
194: #ifdef HAVE_OPAQUE_LSA
195: struct list *opaque_lsa_self; /* Type-9 Opaque-LSAs */
196: #endif /* HAVE_OPAQUE_LSA */
197:
198: struct route_table *ls_upd_queue;
199:
200: struct list *ls_ack; /* Link State Acknowledgment list. */
201:
202: struct
203: {
204: struct list *ls_ack;
205: struct in_addr dst;
206: } ls_ack_direct;
207:
208: /* Timer values. */
209: u_int32_t v_ls_ack; /* Delayed Link State Acknowledgment */
210:
211: /* Threads. */
212: struct thread *t_hello; /* timer */
213: struct thread *t_wait; /* timer */
214: struct thread *t_ls_ack; /* timer */
215: struct thread *t_ls_ack_direct; /* event */
216: struct thread *t_ls_upd_event; /* event */
217: #ifdef HAVE_OPAQUE_LSA
218: struct thread *t_opaque_lsa_self; /* Type-9 Opaque-LSAs */
219: #endif /* HAVE_OPAQUE_LSA */
220:
221: int on_write_q;
222:
223: /* Statistics fields. */
224: u_int32_t hello_in; /* Hello message input count. */
225: u_int32_t hello_out; /* Hello message output count. */
226: u_int32_t db_desc_in; /* database desc. message input count. */
227: u_int32_t db_desc_out; /* database desc. message output count. */
228: u_int32_t ls_req_in; /* LS request message input count. */
229: u_int32_t ls_req_out; /* LS request message output count. */
230: u_int32_t ls_upd_in; /* LS update message input count. */
231: u_int32_t ls_upd_out; /* LS update message output count. */
232: u_int32_t ls_ack_in; /* LS Ack message input count. */
233: u_int32_t ls_ack_out; /* LS Ack message output count. */
234: u_int32_t discarded; /* discarded input count by error. */
235: u_int32_t state_change; /* Number of status change. */
236:
237: u_int32_t full_nbrs;
238: };
239:
240: /* Prototypes. */
241: extern char *ospf_if_name (struct ospf_interface *);
242: extern struct ospf_interface *ospf_if_new (struct ospf *, struct interface *,
243: struct prefix *);
244: extern void ospf_if_cleanup (struct ospf_interface *);
245: extern void ospf_if_free (struct ospf_interface *);
246: extern int ospf_if_up (struct ospf_interface *);
247: extern int ospf_if_down (struct ospf_interface *);
248:
249: extern int ospf_if_is_up (struct ospf_interface *);
250: extern struct ospf_interface *ospf_if_exists (struct ospf_interface *);
251: extern struct ospf_interface *ospf_if_lookup_by_lsa_pos (struct ospf_area *,
252: int);
253: extern struct ospf_interface *ospf_if_lookup_by_local_addr (struct ospf *,
254: struct interface
255: *,
256: struct in_addr);
257: extern struct ospf_interface *ospf_if_lookup_by_prefix (struct ospf *,
258: struct prefix_ipv4 *);
259: extern struct ospf_interface *ospf_if_table_lookup (struct interface *,
260: struct prefix *);
261: extern struct ospf_interface *ospf_if_addr_local (struct in_addr);
262: extern struct ospf_interface *ospf_if_lookup_recv_if (struct ospf *,
263: struct in_addr,
264: struct interface *);
265: extern struct ospf_interface *ospf_if_is_configured (struct ospf *,
266: struct in_addr *);
267:
268: extern struct ospf_if_params *ospf_lookup_if_params (struct interface *,
269: struct in_addr);
270: extern struct ospf_if_params *ospf_get_if_params (struct interface *,
271: struct in_addr);
272: extern void ospf_del_if_params (struct ospf_if_params *);
273: extern void ospf_free_if_params (struct interface *, struct in_addr);
274: extern void ospf_if_update_params (struct interface *, struct in_addr);
275:
276: extern int ospf_if_new_hook (struct interface *);
277: extern void ospf_if_init (void);
278: extern void ospf_if_stream_set (struct ospf_interface *);
279: extern void ospf_if_stream_unset (struct ospf_interface *);
280: extern void ospf_if_reset_variables (struct ospf_interface *);
281: extern int ospf_if_is_enable (struct ospf_interface *);
282: extern int ospf_if_get_output_cost (struct ospf_interface *);
283: extern void ospf_if_recalculate_output_cost (struct interface *);
284:
285: /* Simulate down/up on the interface. */
286: extern void ospf_if_reset (struct interface *);
287:
288: extern struct ospf_interface *ospf_vl_new (struct ospf *,
289: struct ospf_vl_data *);
290: extern struct ospf_vl_data *ospf_vl_data_new (struct ospf_area *,
291: struct in_addr);
292: extern struct ospf_vl_data *ospf_vl_lookup (struct ospf *, struct ospf_area *,
293: struct in_addr);
294: extern void ospf_vl_data_free (struct ospf_vl_data *);
295: extern void ospf_vl_add (struct ospf *, struct ospf_vl_data *);
296: extern void ospf_vl_delete (struct ospf *, struct ospf_vl_data *);
297: extern void ospf_vl_up_check (struct ospf_area *, struct in_addr,
298: struct vertex *);
299: extern void ospf_vl_unapprove (struct ospf *);
300: extern void ospf_vl_shut_unapproved (struct ospf *);
301: extern int ospf_full_virtual_nbrs (struct ospf_area *);
302: extern int ospf_vls_in_area (struct ospf_area *);
303:
304: extern struct crypt_key *ospf_crypt_key_lookup (struct list *, u_char);
305: extern struct crypt_key *ospf_crypt_key_new (void);
306: extern void ospf_crypt_key_add (struct list *, struct crypt_key *);
307: extern int ospf_crypt_key_delete (struct list *, u_char);
308:
309: extern u_char ospf_default_iftype (struct interface *ifp);
310:
311: /* Set all multicast memberships appropriately based on the type and
312: state of the interface. */
313: extern void ospf_if_set_multicast (struct ospf_interface *);
314:
315: #endif /* _ZEBRA_OSPF_INTERFACE_H */
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