/* $OpenBSD: mrt.h,v 1.9 2004/01/18 00:44:44 deraadt Exp $ */ /* * Copyright (c) 2003, 2004 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" /* In cases of failure wait at least MRT_MIN_RETRY. */ #define MRT_MIN_RETRY 300 /* * 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 */ /* * MRT header: * +--------+--------+--------+--------+ * | timestamp | * +--------+--------+--------+--------+ * | type | subtype | * +--------+--------+--------+--------+ * | length | length of packet including header * +--------+--------+--------+--------+ */ #define MRT_HEADER_SIZE 12 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 */ }; /* * 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 }; /* size of the BGP4MP headers without payload */ #define MRT_BGP4MP_HEADER_SIZE 16 /* If the type is PROTOCOL_BGP4MP and the subtype is either BGP4MP_STATE_CHANGE * or BGP4MP_MESSAGE the message consists of a common header plus the payload. * Header format: * * +--------+--------+--------+--------+ * | source_as | dest_as | * +--------+--------+--------+--------+ * | if_index | afi | * +--------+--------+--------+--------+ * | source_ip | * +--------+--------+--------+--------+ * | dest_ip | * +--------+--------+--------+--------+ * | message specific payload ... * +--------+--------+--------+--------+ * * The source_ip and dest_ip are dependant of the afi type. For IPv6 source_ip * and dest_ip are both 16 bytes long. * * Payload of a BGP4MP_STATE_CHANGE packet: * * +--------+--------+--------+--------+ * | old_state | new_state | * +--------+--------+--------+--------+ * * The state values are the same as in RFC 1771. * * The payload of a BGP4MP_MESSAGE is the full bgp message with header. */ /* * The "new" table dump format consists of messages of type PROTOCOL_BGP4MP * and subtype BGP4MP_ENTRY. * * +--------+--------+--------+--------+ * | view | status | * +--------+--------+--------+--------+ * | originated | * +--------+--------+--------+--------+ * | afi | safi | nhlen | * +--------+--------+--------+--------+ * | nexthop | * +--------+--------+--------+--------+ * | plen | prefix variable ... | * +--------+--------+--------+--------+ * | attr_len | bgp attributes * +--------+--------+--------+--------+ * bgp attributes, attr_len bytes long * +--------+--------+--------+--------+ * ... | * +--------+--------+--------+ * * View is normaly 0 and originated the time of last change. * The status seems to be 1 by default but probably something to indicate * the status of a prefix would be more useful. * The format of the nexthop address is defined via the afi value. For IPv6 * the nexthop field is 16 bytes long. * The prefix field is as in the bgp update message variable length. It is * plen bits long but rounded to the next octet. */ /* * Format for routing table dumps in "old" mrt format. * Type MSG_TABLE_DUMP and subtype is AFI_IPv4 (1) for IPv4 and AFI_IPv6 (2) * for IPv6. In the IPv6 case prefix and peer_ip are both 16 bytes long. * * +--------+--------+--------+--------+ * | view | seqnum | * +--------+--------+--------+--------+ * | prefix | * +--------+--------+--------+--------+ * | plen | status | originated * +--------+--------+--------+--------+ * originated | peer_ip * +--------+--------+--------+--------+ * peer_ip | peer_as | * +--------+--------+--------+--------+ * | attr_len | bgp attributes * +--------+--------+--------+--------+ * bgp attributes, attr_len bytes long * +--------+--------+--------+--------+ * ... | * +--------+--------+--------+ * * * View is normaly 0 and seqnum just a simple counter for this dump. * The status seems to be 1 by default but probably something to indicate * the status of a prefix would be more useful. */ /* size of the dump header until attr_len */ #define MRT_DUMP_HEADER_SIZE 22 /* * 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 * * +--------+--------+--------+--------+ * | source_as | source_ip * +--------+--------+--------+--------+ * source_ip | dest_as | * +--------+--------+--------+--------+ * | dest_ip | * +--------+--------+--------+--------+ * | bgp update packet with header et * +--------+--------+--------+--------+ * al. (variable length) ... * +--------+--------+--------+--------+ * * For IPv6 the type is MSG_PROTOCOL_BGP4PLUS and the subtype remains * MSG_BGP_UPDATE. The sourec_ip and dest_ip are again extended to 16 bytes. */ /* * For subtype MSG_BGP_STATECHANGE (for all BGP types or just for the * MSG_PROTOCOL_BGP4PLUS case? Unclear.) * * +--------+--------+--------+--------+ * | source_as | source_ip * +--------+--------+--------+--------+ * source_ip | old_state | * +--------+--------+--------+--------+ * | new_state | * +--------+--------+ * * State are defined in RFC 1771. */ /* * if type MSG_PROTOCOL_BGP and subtype MSG_BGP_SYNC OR * if type MSG_PROTOCOL_BGP4MP and subtype BGP4MP_SNAPSHOT * What is this for? * * +--------+--------+--------+--------+ * | view | filename * +--------+--------+--------+--------+ * filename variable length zero * +--------+--------+--------+--------+ * terminated ... | 0 | * +--------+--------+--------+ */ #define MRT_FILE_LEN 512 enum mrt_type { MRT_NONE, MRT_TABLE_DUMP, MRT_FILTERED_IN, MRT_ALL_IN, MRT_SESSION_IN, MRT_SESSION_OUT }; enum mrt_state { MRT_STATE_STOPPED, MRT_STATE_RUNNING, MRT_STATE_OPEN, MRT_STATE_CLOSE, MRT_STATE_REOPEN, MRT_STATE_TOREMOVE, MRT_STATE_REMOVE }; struct mrt_config { enum mrt_type type; u_int32_t id; u_int32_t peer_id; struct msgbuf *msgbuf; }; struct mrt { struct mrt_config conf; time_t ReopenTimer; time_t ReopenTimerInterval; enum mrt_state state; struct msgbuf msgbuf; struct imsgbuf *ibuf; char name[MRT_FILE_LEN]; /* base file name */ char file[MRT_FILE_LEN]; /* actual file name */ LIST_ENTRY(mrt) list; }; struct prefix; struct pt_entry; /* prototypes */ int mrt_dump_bgp_msg(struct mrt_config *, void *, u_int16_t, int, struct peer_config *, struct bgpd_config *); int mrt_dump_state(struct mrt_config *, u_int16_t, u_int16_t, struct peer_config *, struct bgpd_config *); void mrt_clear_seq(void); void mrt_dump_upcall(struct pt_entry *, void *); void mrt_init(struct imsgbuf *, struct imsgbuf *); void mrt_abort(struct mrt *); int mrt_queue(struct mrt_head *, struct imsg *); int mrt_write(struct mrt *); int mrt_select(struct mrt_head *, struct pollfd *, struct mrt **, int, int, int *); int mrt_handler(struct mrt_head *); int mrt_mergeconfig(struct mrt_head *, struct mrt_head *); #endif