/* * $Id: libnet-ospf.h,v 1.1.1.1 2007/08/06 10:04:42 root Exp $ * * libnet-ospf.h - Network routine library headers header file * * Copyright (c) 1999 Andrew Reiter * Bindview Development * * Copyright (c) 1998 - 2001 Mike D. Schiffman * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #ifndef __LIBNET_OSPF_H #define __LIBNET_OSPF_H #include /* * Not all OSes define this in /etc/protocols.. ie, solaris... */ #ifndef IPPROTO_OSPF #define IPPROTO_OSPF 89 #endif #define IPPROTO_OSPF_LSA 890 /* Made this up. Hope it's unused */ #define OSPFVERSION 2 #define LIBNET_MODX 4102 /* Used in LSA checksum */ /* * OSPF header lengths. */ #define LIBNET_OSPF_H 0x10 /* 16 bytes */ #define LIBNET_HELLO_H 0x18 /* 24 bytes */ #define LIBNET_DBD_H 0x8 /* 8 bytes */ #define LIBNET_LSR_H 0xc /* 12 bytes */ #define LIBNET_LSU_H 0x4 /* 4 bytes */ #define LIBNET_LSA_H 0x14 /* 20 bytes */ #define LIBNET_AUTH_H 0x8 /* 8 bytes */ #define LIBNET_OSPF_CKSUM 0x10 /* 16 bytes */ /* * Link State packet format lengths. */ #define LIBNET_LS_RTR_LEN 0x10 /* 16 bytes */ #define LIBNET_LS_NET_LEN 0x8 /* 8 bytes */ #define LIBNET_LS_SUM_LEN 0xc /* 12 bytes */ #define LIBNET_LS_AS_EXT_LEN 0x10 /* 16 bytes */ /* * OSPFv2 Packet Header. */ struct libnet_ospf_hdr { u_char ospf_v; /* version */ u_char ospf_type; /* type */ #define LIBNET_OSPF_UMD 0 /* UMd monitoring packet */ #define LIBNET_OSPF_HELLO 1 /* HELLO packet */ #define LIBNET_OSPF_DBD 2 /* DataBase Description Packet */ #define LIBNET_OSPF_LSR 3 /* Link State Request Packet */ #define LIBNET_OSPF_LSU 4 /* Link State Update Packet */ #define LIBNET_OSPF_LSA 5 /* Link State Acknowledgement Packet */ u_short ospf_len; /* length */ struct in_addr ospf_rtr_id; /* source router ID */ struct in_addr ospf_area_id; /* roam ID */ u_short ospf_cksum; /* checksum */ u_short ospf_auth_type; /* authentication type */ #define LIBNET_OSPF_AUTH_NULL 0 /* Null password */ #define LIBNET_OSPF_AUTH_SIMPLE 1 /* Simple, plaintext, 8 char password */ #define LIBNET_OSPF_AUTH_MD5 2 /* MD5 */ }; /* * OSPF authentication header. */ struct libnet_auth_hdr { u_short ospf_auth_null; /* NULL */ u_char ospf_auth_keyid; /* Authentication Key ID */ u_char ospf_auth_len; /* Auth data length */ u_int ospf_auth_seq; /* Cryptographic sequence number */ }; /* * Options used in multiple OSPF packets. * More info can be found in section A.2 of RFC 2328. */ #define LIBNET_OPT_EBIT 0x02 /* Describes the way AS-external-LSAs are flooded */ #define LIBNET_OPT_MCBIT 0x04 /* Whether or not IP multicast dgrams are fwdd */ #define LIBNET_OPT_NPBIT 0x08 /* Describes handling of type-7 LSAs */ #define LIBNET_OPT_EABIT 0x10 /* rtr's willingness to send/recv EA-LSAs */ #define LIBNET_OPT_DCBIT 0x20 /* Describes handling of demand circuits */ /* * OSPF HELLO Packet Header. */ struct libnet_ospf_hello_hdr { struct in_addr hello_nmask; /* Netmask associated with the interface */ u_short hello_intrvl; /* Num of seconds between routers last packet */ u_char hello_opts; /* Options for HELLO packets (look above) */ u_char hello_rtr_pri; /* Router's priority (if 0, can't be backup) */ u_int hello_dead_intvl; /* # of secs a router is silent till deemed down */ struct in_addr hello_des_rtr; /* Designated router on the network */ struct in_addr hello_bkup_rtr; /* Backup router */ struct in_addr hello_nbr; /* neighbor router, memcpy more as needed */ }; /* * Database Description header. */ struct libnet_dbd_hdr { u_short dbd_mtu_len; /* Max length of IP dgram that this 'if' can use */ u_char dbd_opts; /* DBD packet options (look above) */ u_char dbd_type; /* Type of exchange occurring (look below) */ #define LIBNET_DBD_IBIT 0x01 /* Init Bit */ #define LIBNET_DBD_MBIT 0x02 /* Says more DBD packets are to come */ #define LIBNET_DBD_MSBIT 0x04 /* If 1, sender is the master in the exchnge */ u_int dbd_seq; /* DBD sequence number */ }; /* * Used for the LS type field in all LS* headers. */ #define LIBNET_LS_TYPE_RTR 1 /* Router-LSA */ #define LIBNET_LS_TYPE_NET 2 /* Network-LSA */ #define LIBNET_LS_TYPE_IP 3 /* Summary-LSA (IP Network) */ #define LIBNET_LS_TYPE_ASBR 4 /* Summary-LSA (ASBR) */ #define LIBNET_LS_TYPE_ASEXT 5 /* AS-External-LSA */ /* * Link State Request header. */ struct libnet_lsr_hdr { u_int lsr_type; /* Type of LS being requested (see below) */ u_int lsr_lsid; /* Link State ID */ struct in_addr lsr_adrtr; /* advertising router (memcpy more as needed) */ }; /* * Link State Update header. */ struct libnet_lsu_hdr { u_int lsu_num; /* Number of LSAs that will be broadcasted */ }; /* * Link State Acknowledgement header. */ struct libnet_lsa_hdr { u_short lsa_age; /* Time in seconds since the LSA was originated */ u_char lsa_opts; /* Look above for OPTS_* */ u_char lsa_type; /* Look below for LS_TYPE_* */ u_int lsa_id; /* Link State ID */ struct in_addr lsa_adv; /* Router ID of Advertising router */ u_int lsa_seq; /* LSA sequence number to detect old/bad ones */ u_char lsa_cksum[2]; /* "Fletcher Checksum" of all fields minus age */ u_short lsa_len; /* Length in bytes including the 20 byte header */ }; /* * Router LSA data format * * Other stuff for TOS can be added for backward compatability, for this * version, only OSPFv2 is being FULLY supported. */ struct libnet_rtr_lsa_hdr { u_short rtr_flags; /* Set to help describe packet */ #define LIBNET_RTR_FLAGS_W 0x0100 /* W bit */ #define LIBNET_RTR_FLAGS_E 0x0200 /* E bit */ #define LIBNET_RTR_FLAGS_B 0x0400 /* B bit */ u_short rtr_num; /* Number of links within that packet */ u_int rtr_link_id; /* Describes link_data (look below) */ #define LIBNET_LINK_ID_NBR_ID 1 /* Neighbors router ID, also can be 4 */ #define LIBNET_LINK_ID_IP_DES 2 /* IP address of designated router */ #define LIBNET_LINK_ID_SUB 3 /* IP subnet number */ u_int rtr_link_data; /* Depending on link_id, info is here */ u_char rtr_type; /* Description of router link */ #define LIBNET_RTR_TYPE_PTP 1 /* Point-To-Point */ #define LIBNET_RTR_TYPE_TRANS 2 /* Connection to a "transit network" */ #define LIBNET_RTR_TYPE_STUB 3 /* Connectin to a "stub network" */ #define RTR_TYPE_VRTL 4 /* Connects to a "virtual link" */ u_char rtr_tos_num; /* Number of different TOS metrics for this link */ u_short rtr_metric; /* The "cost" of using this link */ }; /* * Network LSA data format. */ struct libnet_net_lsa_hdr { struct in_addr net_nmask; /* Netmask for that network */ u_int net_rtr_id; /* ID of router attached to that network */ }; /* * Summary LSA data format. */ struct libnet_sum_lsa_hdr { struct in_addr sum_nmask; /* Netmask of destination IP address */ u_int sum_metric; /* Same as in rtr_lsa (&0xfff to use last 24bit) */ u_int sum_tos_metric; /* first 8bits are TOS, 24bits are TOS Metric */ }; /* * AS External LSA data format. * & 0xfff logic operator for as_metric to get last 24bits. */ struct libnet_as_lsa_hdr { struct in_addr as_nmask; /* Netmask for advertised destination */ u_int as_metric; /* May have to set E bit in first 8bits */ #define LIBNET_AS_E_BIT_ON 0x80000000 /* as_metric */ struct in_addr as_fwd_addr; /* Forwarding address */ u_int as_rte_tag; /* External route tag */ }; int libnet_build_ospf( u_short, u_char, u_long, u_long, u_short, const char *, int, u_char * ); int libnet_build_ospf_hello( u_long, u_short, u_char, u_char, u_int, u_long, u_long, u_long, const char *, int, u_char * ); int libnet_build_ospf_dbd( u_short, u_char, u_char, u_int, const char *, int, u_char * ); int libnet_build_ospf_lsr( u_int, u_int, u_long, const char *, int, u_char * ); int libnet_build_ospf_lsu( u_int, const char *, int, u_char * ); int libnet_build_ospf_lsa( u_short, u_char, u_char, u_int, u_long, u_int, u_short, const char *, int, u_char * ); int libnet_build_ospf_lsa_rtr( u_short, u_short, u_int, u_int, u_char, u_char, u_short, const char *, int, u_char * ); int libnet_build_ospf_lsa_net( u_long, u_int, const char *, int, u_char * ); int libnet_build_ospf_lsa_sum( u_long, u_int, u_int, const char *, int, u_char * ); int libnet_build_ospf_lsa_as( u_long, u_int, u_long, u_int, const char *, int, u_char * ); void libnet_ospf_lsa_checksum( u_char *, int ); #endif /* __LIBNET_OSPF_H */