/* $OpenBSD: mrt.h,v 1.6 2004/01/02 00:13:32 deraadt Exp $ */ /* * Copyright (c) 2003 Claudio Jeker * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #ifndef __MRT_H__ #define __MRT_H__ #include "bgpd.h" /* * MRT binary packet format as used by zebra. * For more info see: * http://www.mrtd.net/mrt_doc/html/mrtprogrammer.html#_Toc412283890 * or * http://www.mrtd.net/mrt_doc/PDF/mrtprogrammer.pdf (Chapter 12) * and * http://www.quagga.net/docs/docs-multi/Packet-Binary-Dump-Format.html */ struct mrt_header { u_int32_t timestamp; u_int16_t type; u_int16_t subtype; u_int32_t length; /* length of packet including header */ }; enum MRT_MSG_TYPES { MSG_NULL, MSG_START, /* 1 sender is starting up */ MSG_DIE, /* 2 receiver should shut down */ MSG_I_AM_DEAD, /* 3 sender is shutting down */ MSG_PEER_DOWN, /* 4 sender's peer is down */ MSG_PROTOCOL_BGP, /* 5 msg is a BGP packet */ MSG_PROTOCOL_RIP, /* 6 msg is a RIP packet */ MSG_PROTOCOL_IDRP, /* 7 msg is an IDRP packet */ MSG_PROTOCOL_RIPNG, /* 8 msg is a RIPNG packet */ MSG_PROTOCOL_BGP4PLUS, /* 9 msg is a BGP4+ packet */ MSG_PROTOCOL_BGP4PLUS1, /* 10 msg is a BGP4+ (draft 01) packet */ MSG_PROTOCOL_OSPF, /* 11 msg is an OSPF packet */ MSG_TABLE_DUMP, /* 12 routing table dump */ MSG_PROTOCOL_BGP4MP=16 /* 16 zebras own packet format */ }; #define MRT_HEADER_SIZE sizeof(struct mrt_header) #define MRT_DUMP_HEADER_SIZE 22 /* sizeof(struct mrt_dump_v4_header) */ #define MRT_BGP4MP_HEADER_SIZE \ sizeof(struct mrt_bgp4mp_header) + \ sizeof(struct mrt_bgp4mp_IPv4) /* * format for routing table dumps in mrt format. * Type MSG_TABLE_DUMP and subtype is address family (IPv4) */ struct mrt_dump_v4_header { u_int16_t view; /* normally 0 */ u_int16_t seqnum; /* simple counter for this dump */ u_int32_t prefix; u_int8_t prefixlen; u_int8_t status; /* default seems to be 1 */ u_int32_t originated; /* seems to be time of last update */ u_int32_t peer_ip; u_int16_t peer_as; u_int16_t attr_len; /* bgp attributes attr_len bytes long */ }; /* * format for routing table dumps in mrt format. * Type MSG_TABLE_DUMP and subtype is address family (IPv6) */ struct mrt_dump_v6_header { u_int16_t view; /* normally 0 */ u_int16_t seqnum; /* simple counter for this dump */ u_int32_t prefix[4]; u_int8_t prefixlen; u_int8_t status; /* default seems to be 1 */ u_int32_t originated; /* seems to be time of last update */ u_int32_t peer_ip[4]; u_int16_t peer_as; u_int16_t attr_len; /* bgp attributes attr_len bytes long */ }; /* * Main zebra dump format is in MSG_PROTOCOL_BGP4MP exceptions are table dumps * that are normaly saved as MSG_TABLE_DUMP. * In most cases this is the format to choose to dump updates et al. */ enum MRT_BGP4MP_TYPES { BGP4MP_STATE_CHANGE=0, /* state change */ BGP4MP_MESSAGE=1, /* bgp message */ BGP4MP_ENTRY=2, /* table dumps */ BGP4MP_SNAPSHOT=3 }; /* if type PROTOCOL_BGP4MP and * subtype BGP4MP_STATE_CHANGE or BGP4MP_MESSAGE */ struct mrt_bgp4mp_header { u_int16_t source_as; u_int16_t dest_as; u_int16_t if_index; u_int16_t afi; /* * Next comes either a struct mrt_bgp4mp_IPv4 or a * struct mrt_bgp4mp_IPv6 dependent on afi type. * * Last but not least the payload. */ }; /* if afi = 4 */ struct mrt_bgp4mp_IPv4 { u_int32_t source_ip; u_int32_t dest_ip; }; /* if afi = 6 */ struct mrt_bgp4mp_IPv6 { u_int32_t source_ip[4]; u_int32_t dest_ip[4]; }; /* * payload of a BGP4MP_STATE_CHANGE packet */ struct mrt_bgp4mp_state_data { u_int16_t old_state; /* as in RFC 1771 */ u_int16_t new_state; }; /* * The payload of a BGP4MP_MESSAGE is the full bgp message with header. */ /* if type PROTOCOL_BGP4MP, subtype BGP4MP_ENTRY */ struct mrt_bgp4mp_entry_header { u_int16_t view; u_int16_t status; u_int32_t originated; /* time last change */ u_int16_t afi; u_int8_t safi; u_int8_t nexthop_len; /* * u_int32_t nexthop for IPv4 or * u_int32_t nexthop[4] for IPv6 * u_int8_t prefixlen * variable prefix (prefixlen bits long rounded to the next octet) * u_int16_t attrlen * variable length bgp attributes attrlen bytes long */ }; /* * What is this for? * if type MSG_PROTOCOL_BGP and subtype MSG_BGP_SYNC OR * if type MSG_PROTOCOL_BGP4MP and subtype BGP4MP_SNAPSHOT */ struct mrt_bgp_sync_header { u_int16_t view; char filename[2]; /* variable */ }; /* * OLD MRT message headers. These structs are here for completion but * will not be used to generate dumps. It seems that nobody uses those. */ /* * Only for bgp messages (type 5, 9 and 10) * Nota bene for bgp dumps MSG_PROTOCOL_BGP4MP should be used. */ enum MRT_BGP_TYPES { MSG_BGP_NULL, MSG_BGP_UPDATE, /* raw update packet (contains both withdraws and announcements) */ MSG_BGP_PREF_UPDATE, /* tlv preferences followed by raw update */ MSG_BGP_STATE_CHANGE, /* state change */ MSG_BGP_SYNC }; /* if type MSG_PROTOCOL_BGP and subtype MSG_BGP_UPDATE */ struct mrt_bgp_update_header { u_int16_t source_as; u_int32_t source_ip; u_int16_t dest_as; u_int32_t dest_ip; /* bgp update packet */ }; /* if type MSG_PROTOCOL_BGP4PLUS and subtype MSG_BGP_UPDATE */ struct mrt_bgp_update_plus_header { u_int16_t source_as; u_int32_t source_ip[4]; u_int16_t dest_as; u_int32_t dest_ip[4]; /* bgp update packet */ }; /* for subtype MSG_BGP_STATECHANGE (for all BGP types ???) */ struct mrt_bgp_state_header { u_int16_t source_as; u_int32_t source_ip[4]; u_int16_t old_state; /* as in RFC 1771 ??? */ u_int16_t new_state; }; /* pseudo predeclarations */ struct prefix; struct pt_entry; struct mrt { struct msgbuf *msgbuf; u_int32_t id; }; /* prototypes */ int mrt_dump_bgp_msg(struct mrt *, void *, u_int16_t, int, struct peer_config *, struct bgpd_config *); void mrt_clear_seq(void); void mrt_dump_upcall(struct pt_entry *, void *); int mrt_state(struct mrtdump_config *, enum imsg_type, struct imsgbuf *); int mrt_alrm(struct mrt_config *, struct imsgbuf *); int mrt_usr1(struct mrt_config *, struct imsgbuf *); #endif