ospf_packet.h
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- /*
- * OSPF Sending and Receiving OSPF Packets.
- * Copyright (C) 1999 Toshiaki Takada
- *
- * This file is part of GNU Zebra.
- *
- * GNU Zebra is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * GNU Zebra is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU Zebra; see the file COPYING. If not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
- #ifndef _ZEBRA_OSPF_PACKET_H
- #define _ZEBRA_OSPF_PACKET_H
- #define OSPF_HEADER_SIZE 24
- #define OSPF_AUTH_SIMPLE_SIZE 8
- #define OSPF_AUTH_MD5_SIZE 16
- #define OSPF_MAX_PACKET_SIZE 65535 /* includes IP Header size. */
- #define OSPF_HELLO_MIN_SIZE 20 /* not including neighbors */
- #define OSPF_DB_DESC_MIN_SIZE 8
- #define OSPF_LS_REQ_MIN_SIZE 0
- #define OSPF_LS_UPD_MIN_SIZE 4
- #define OSPF_LS_ACK_MIN_SIZE 0
- #define OSPF_MSG_HELLO 1 /* OSPF Hello Message. */
- #define OSPF_MSG_DB_DESC 2 /* OSPF Database Descriptoin Message. */
- #define OSPF_MSG_LS_REQ 3 /* OSPF Link State Request Message. */
- #define OSPF_MSG_LS_UPD 4 /* OSPF Link State Update Message. */
- #define OSPF_MSG_LS_ACK 5 /* OSPF Link State Acknoledgement Message. */
- #define OSPF_SEND_PACKET_DIRECT 1
- #define OSPF_SEND_PACKET_INDIRECT 2
- #ifdef HAVE_NSSA
- #define OSPF_SEND_PACKET_LOOP 3
- #endif /* HAVE_NSSA */
- #define OSPF_HELLO_REPLY_DELAY 1
- struct ospf_packet
- {
- struct ospf_packet *next;
- /* Pointer to data stream. */
- struct stream *s;
- /* IP destination address. */
- struct in_addr dst;
- /* OSPF packet length. */
- u_int16_t length;
- };
- /* OSPF packet queue structure. */
- struct ospf_fifo
- {
- unsigned long count;
- struct ospf_packet *head;
- struct ospf_packet *tail;
- };
- /* OSPF packet header structure. */
- struct ospf_header
- {
- u_char version; /* OSPF Version. */
- u_char type; /* Packet Type. */
- u_int16_t length; /* Packet Length. */
- struct in_addr router_id; /* Router ID. */
- struct in_addr area_id; /* Area ID. */
- u_int16_t checksum; /* Check Sum. */
- u_int16_t auth_type; /* Authentication Type. */
- /* Authentication Data. */
- union
- {
- /* Simple Authentication. */
- u_char auth_data [OSPF_AUTH_SIMPLE_SIZE];
- /* Cryptographic Authentication. */
- struct
- {
- u_int16_t zero; /* Should be 0. */
- u_char key_id; /* Key ID. */
- u_char auth_data_len; /* Auth Data Length. */
- u_int32_t crypt_seqnum; /* Cryptographic Sequence Number. */
- } crypt;
- } u;
- };
- /* OSPF Hello body format. */
- struct ospf_hello
- {
- struct in_addr network_mask;
- u_int16_t hello_interval;
- u_char options;
- u_char priority;
- u_int32_t dead_interval;
- struct in_addr d_router;
- struct in_addr bd_router;
- struct in_addr neighbors[1];
- };
- /* OSPF Database Description body format. */
- struct ospf_db_desc
- {
- u_int16_t mtu;
- u_char options;
- u_char flags;
- u_int32_t dd_seqnum;
- };
- /* Macros. */
- #define OSPF_PACKET_MAX(oi) ospf_packet_max (oi)
- /*
- #define OSPF_PACKET_MAX(oi) (((oi)->ifp->mtu - ((oi)->auth_md5 ? OSPF_AUTH_MD5_SIZE : 0)) - 88)
- */
- #define OSPF_OUTPUT_PNT(S) ((S)->data + (S)->putp)
- #define OSPF_OUTPUT_LENGTH(S) ((S)->endp)
- #define IS_SET_DD_MS(X) ((X) & OSPF_DD_FLAG_MS)
- #define IS_SET_DD_M(X) ((X) & OSPF_DD_FLAG_M)
- #define IS_SET_DD_I(X) ((X) & OSPF_DD_FLAG_I)
- #define IS_SET_DD_ALL(X) ((X) & OSPF_DD_FLAG_ALL)
- /* Prototypes. */
- void ospf_output_forward (struct stream *, int);
- struct ospf_packet *ospf_packet_new (size_t);
- void ospf_packet_free (struct ospf_packet *);
- struct ospf_fifo *ospf_fifo_new ();
- void ospf_fifo_push (struct ospf_fifo *, struct ospf_packet *);
- struct ospf_packet *ospf_fifo_pop (struct ospf_fifo *);
- struct ospf_packet *ospf_fifo_head (struct ospf_fifo *);
- void ospf_fifo_flush (struct ospf_fifo *);
- void ospf_fifo_free (struct ospf_fifo *);
- void ospf_packet_add (struct ospf_interface *, struct ospf_packet *);
- void ospf_packet_delete (struct ospf_interface *);
- struct stream *ospf_stream_dup (struct stream *);
- struct ospf_packet *ospf_packet_dup (struct ospf_packet *);
- int ospf_read (struct thread *);
- void ospf_hello_send (struct ospf_interface *);
- void ospf_db_desc_send (struct ospf_neighbor *);
- void ospf_db_desc_resend (struct ospf_neighbor *);
- void ospf_ls_req_send (struct ospf_neighbor *);
- void ospf_ls_upd_send_lsa (struct ospf_neighbor *, struct ospf_lsa *, int);
- void ospf_ls_upd_send (struct ospf_neighbor *, list, int);
- void ospf_ls_ack_send (struct ospf_neighbor *, struct ospf_lsa *);
- void ospf_ls_ack_send_delayed (struct ospf_interface *);
- void ospf_ls_retransmit (struct ospf_interface *, struct ospf_lsa *);
- void ospf_ls_req_event (struct ospf_neighbor *);
- int ospf_ls_upd_timer (struct thread *);
- int ospf_ls_ack_timer (struct thread *);
- int ospf_poll_timer (struct thread *);
- int ospf_hello_reply_timer (struct thread *);
- void ospf_hello_send_sub (struct ospf_interface *, struct in_addr *);
- #endif /* _ZEBRA_OSPF_PACKET_H */