Annotation of embedaddon/quagga/ospfd/ospf_packet.h, revision 1.1
1.1 ! misho 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 24U
! 27: #define OSPF_AUTH_SIMPLE_SIZE 8U
! 28: #define OSPF_AUTH_MD5_SIZE 16U
! 29:
! 30: #define OSPF_MAX_PACKET_SIZE 65535U /* includes IP Header size. */
! 31: #define OSPF_HELLO_MIN_SIZE 20U /* not including neighbors */
! 32: #define OSPF_DB_DESC_MIN_SIZE 8U
! 33: #define OSPF_LS_REQ_MIN_SIZE 0U
! 34: #define OSPF_LS_UPD_MIN_SIZE 4U
! 35: #define OSPF_LS_ACK_MIN_SIZE 0U
! 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
! 45: #define OSPF_SEND_PACKET_LOOP 3
! 46:
! 47: #define OSPF_HELLO_REPLY_DELAY 1
! 48:
! 49: struct 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. */
! 64: struct 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. */
! 73: struct 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. */
! 99: struct 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. */
! 112: struct 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: /* XXX Perhaps obsolete; function in ospf_packet.c */
! 123: #define OSPF_PACKET_MAX(oi) ospf_packet_max (oi)
! 124:
! 125: #define OSPF_OUTPUT_PNT(S) ((S)->data + (S)->putp)
! 126: #define OSPF_OUTPUT_LENGTH(S) ((S)->endp)
! 127:
! 128: #define IS_SET_DD_MS(X) ((X) & OSPF_DD_FLAG_MS)
! 129: #define IS_SET_DD_M(X) ((X) & OSPF_DD_FLAG_M)
! 130: #define IS_SET_DD_I(X) ((X) & OSPF_DD_FLAG_I)
! 131: #define IS_SET_DD_ALL(X) ((X) & OSPF_DD_FLAG_ALL)
! 132:
! 133: /* Prototypes. */
! 134: extern void ospf_output_forward (struct stream *, int);
! 135: extern struct ospf_packet *ospf_packet_new (size_t);
! 136: extern void ospf_packet_free (struct ospf_packet *);
! 137: extern struct ospf_fifo *ospf_fifo_new (void);
! 138: extern void ospf_fifo_push (struct ospf_fifo *, struct ospf_packet *);
! 139: extern struct ospf_packet *ospf_fifo_pop (struct ospf_fifo *);
! 140: extern struct ospf_packet *ospf_fifo_head (struct ospf_fifo *);
! 141: extern void ospf_fifo_flush (struct ospf_fifo *);
! 142: extern void ospf_fifo_free (struct ospf_fifo *);
! 143: extern void ospf_packet_add (struct ospf_interface *, struct ospf_packet *);
! 144: extern void ospf_packet_delete (struct ospf_interface *);
! 145: extern struct stream *ospf_stream_dup (struct stream *);
! 146: extern struct ospf_packet *ospf_packet_dup (struct ospf_packet *);
! 147:
! 148: extern int ospf_read (struct thread *);
! 149: extern void ospf_hello_send (struct ospf_interface *);
! 150: extern void ospf_db_desc_send (struct ospf_neighbor *);
! 151: extern void ospf_db_desc_resend (struct ospf_neighbor *);
! 152: extern void ospf_ls_req_send (struct ospf_neighbor *);
! 153: extern void ospf_ls_upd_send_lsa (struct ospf_neighbor *, struct ospf_lsa *,
! 154: int);
! 155: extern void ospf_ls_upd_send (struct ospf_neighbor *, struct list *, int);
! 156: extern void ospf_ls_ack_send (struct ospf_neighbor *, struct ospf_lsa *);
! 157: extern void ospf_ls_ack_send_delayed (struct ospf_interface *);
! 158: extern void ospf_ls_retransmit (struct ospf_interface *, struct ospf_lsa *);
! 159: extern void ospf_ls_req_event (struct ospf_neighbor *);
! 160:
! 161: extern int ospf_ls_upd_timer (struct thread *);
! 162: extern int ospf_ls_ack_timer (struct thread *);
! 163: extern int ospf_poll_timer (struct thread *);
! 164: extern int ospf_hello_reply_timer (struct thread *);
! 165:
! 166: #endif /* _ZEBRA_OSPF_PACKET_H */
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