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gerrit.opencord.org / quagga / aa0b9f912dc1057261fa02fbf5d458f222900af6 / . / ospfd / ospf_packet.h
blob: 48f4e13dcce4bb1b3d8595179249ad8ca4cfc836 [file] [log] [blame]
paul718e3742002-12-13 20:15:29 +0000[diff] [blame]1/*
2 * OSPF Sending and Receiving OSPF Packets.
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 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#ifndef _ZEBRA_OSPF_PACKET_H
24#define _ZEBRA_OSPF_PACKET_H
25
26#define OSPF_HEADER_SIZE 24
27#define OSPF_AUTH_SIMPLE_SIZE 8
28#define OSPF_AUTH_MD5_SIZE 16
29
30#define OSPF_MAX_PACKET_SIZE 65535 /* includes IP Header size. */
31#define OSPF_HELLO_MIN_SIZE 20 /* not including neighbors */
32#define OSPF_DB_DESC_MIN_SIZE 8
33#define OSPF_LS_REQ_MIN_SIZE 0
34#define OSPF_LS_UPD_MIN_SIZE 4
35#define OSPF_LS_ACK_MIN_SIZE 0
36
37#define OSPF_MSG_HELLO 1 /* OSPF Hello Message. */
38#define OSPF_MSG_DB_DESC 2 /* OSPF Database Descriptoin Message. */
39#define OSPF_MSG_LS_REQ 3 /* OSPF Link State Request Message. */
40#define OSPF_MSG_LS_UPD 4 /* OSPF Link State Update Message. */
41#define OSPF_MSG_LS_ACK 5 /* OSPF Link State Acknoledgement Message. */
42
43#define OSPF_SEND_PACKET_DIRECT 1
44#define OSPF_SEND_PACKET_INDIRECT 2
paul718e3742002-12-13 20:15:29 +0000[diff] [blame]45#define OSPF_SEND_PACKET_LOOP 3
paul718e3742002-12-13 20:15:29 +0000[diff] [blame]46
47#define OSPF_HELLO_REPLY_DELAY 1
48
49struct ospf_packet
50{
51 struct ospf_packet *next;
52
53 /* Pointer to data stream. */
54 struct stream *s;
55
56 /* IP destination address. */
57 struct in_addr dst;
58
59 /* OSPF packet length. */
60 u_int16_t length;
61};
62
63/* OSPF packet queue structure. */
64struct ospf_fifo
65{
66 unsigned long count;
67
68 struct ospf_packet *head;
69 struct ospf_packet *tail;
70};
71
72/* OSPF packet header structure. */
73struct ospf_header
74{
75 u_char version; /* OSPF Version. */
76 u_char type; /* Packet Type. */
77 u_int16_t length; /* Packet Length. */
78 struct in_addr router_id; /* Router ID. */
79 struct in_addr area_id; /* Area ID. */
80 u_int16_t checksum; /* Check Sum. */
81 u_int16_t auth_type; /* Authentication Type. */
82 /* Authentication Data. */
83 union
84 {
85 /* Simple Authentication. */
86 u_char auth_data [OSPF_AUTH_SIMPLE_SIZE];
87 /* Cryptographic Authentication. */
88 struct
89 {
90 u_int16_t zero; /* Should be 0. */
91 u_char key_id; /* Key ID. */
92 u_char auth_data_len; /* Auth Data Length. */
93 u_int32_t crypt_seqnum; /* Cryptographic Sequence Number. */
94 } crypt;
95 } u;
96};
97
98/* OSPF Hello body format. */
99struct ospf_hello
100{
101 struct in_addr network_mask;
102 u_int16_t hello_interval;
103 u_char options;
104 u_char priority;
105 u_int32_t dead_interval;
106 struct in_addr d_router;
107 struct in_addr bd_router;
108 struct in_addr neighbors[1];
109};
110
111/* OSPF Database Description body format. */
112struct ospf_db_desc
113{
114 u_int16_t mtu;
115 u_char options;
116 u_char flags;
117 u_int32_t dd_seqnum;
118};
119
120
121/* Macros. */
122#define OSPF_PACKET_MAX(oi) ospf_packet_max (oi)
123/*
124#define OSPF_PACKET_MAX(oi) (((oi)->ifp->mtu - ((oi)->auth_md5 ? OSPF_AUTH_MD5_SIZE : 0)) - 88)
125*/
126
127#define OSPF_OUTPUT_PNT(S) ((S)->data + (S)->putp)
128#define OSPF_OUTPUT_LENGTH(S) ((S)->endp)
129
130#define IS_SET_DD_MS(X) ((X) & OSPF_DD_FLAG_MS)
131#define IS_SET_DD_M(X) ((X) & OSPF_DD_FLAG_M)
132#define IS_SET_DD_I(X) ((X) & OSPF_DD_FLAG_I)
133#define IS_SET_DD_ALL(X) ((X) & OSPF_DD_FLAG_ALL)
134
135/* Prototypes. */
136void ospf_output_forward (struct stream *, int);
137struct ospf_packet *ospf_packet_new (size_t);
138void ospf_packet_free (struct ospf_packet *);
139struct ospf_fifo *ospf_fifo_new ();
140void ospf_fifo_push (struct ospf_fifo *, struct ospf_packet *);
141struct ospf_packet *ospf_fifo_pop (struct ospf_fifo *);
142struct ospf_packet *ospf_fifo_head (struct ospf_fifo *);
143void ospf_fifo_flush (struct ospf_fifo *);
144void ospf_fifo_free (struct ospf_fifo *);
145void ospf_packet_add (struct ospf_interface *, struct ospf_packet *);
146void ospf_packet_delete (struct ospf_interface *);
147struct stream *ospf_stream_dup (struct stream *);
148struct ospf_packet *ospf_packet_dup (struct ospf_packet *);
149
150int ospf_read (struct thread *);
151void ospf_hello_send (struct ospf_interface *);
152void ospf_db_desc_send (struct ospf_neighbor *);
153void ospf_db_desc_resend (struct ospf_neighbor *);
154void ospf_ls_req_send (struct ospf_neighbor *);
155void ospf_ls_upd_send_lsa (struct ospf_neighbor *, struct ospf_lsa *, int);
hasso52dc7ee2004-09-23 19:18:23 +0000[diff] [blame]156void ospf_ls_upd_send (struct ospf_neighbor *, struct list *, int);
paul718e3742002-12-13 20:15:29 +0000[diff] [blame]157void ospf_ls_ack_send (struct ospf_neighbor *, struct ospf_lsa *);
158void ospf_ls_ack_send_delayed (struct ospf_interface *);
159void ospf_ls_retransmit (struct ospf_interface *, struct ospf_lsa *);
160void ospf_ls_req_event (struct ospf_neighbor *);
161
162int ospf_ls_upd_timer (struct thread *);
163int ospf_ls_ack_timer (struct thread *);
164int ospf_poll_timer (struct thread *);
165int ospf_hello_reply_timer (struct thread *);
166void ospf_hello_send_sub (struct ospf_interface *, struct in_addr *);
167
168#endif /* _ZEBRA_OSPF_PACKET_H */