159 lines
4.5 KiB
C
159 lines
4.5 KiB
C
/*
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* BIRD -- Multi-Threaded Routing Toolkit (MRT) Protocol
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*
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* (c) 2017--2018 Ondrej Zajicek <santiago@crfreenet.org>
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* (c) 2017--2018 CZ.NIC z.s.p.o.
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_MRT_H_
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#define _BIRD_MRT_H_
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#include "nest/bird.h"
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#include "nest/protocol.h"
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#include "lib/lists.h"
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#include "nest/route.h"
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#include "lib/event.h"
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#include "lib/hash.h"
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struct mrt_config {
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struct proto_config c;
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struct rtable_config *table_cf;
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const char *table_expr;
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const struct filter *filter;
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const char *filename;
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uint period;
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int always_add_path;
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};
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struct mrt_proto {
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struct proto p;
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timer *timer;
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event *event;
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struct mrt_target *file;
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struct mrt_table_dump_state *table_dump;
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};
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struct mrt_dump_data {
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const char *table_expr;
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struct rtable *table_ptr;
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const struct filter *filter;
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const char *filename;
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};
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struct mrt_peer_entry {
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u32 index;
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u32 peer_id;
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u32 peer_as;
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ip_addr peer_ip;
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struct mrt_peer_entry *next;
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};
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struct mrt_table_dump_state {
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struct mrt_proto *proto; /* Protocol for regular MRT dumps (or NULL) */
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struct cli *cli; /* CLI for irregular MRT dumps (or NULL) */
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struct config *config; /* Config valid during start of dump, locked */
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/* Configuration information */
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const char *table_expr; /* Wildcard for table name (or NULL) */
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struct rtable *table_ptr; /* Explicit table (or NULL) */
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const struct filter *filter; /* Optional filter */
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const char *filename; /* Filename pattern */
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int always_add_path; /* Always use *_ADDPATH message subtypes */
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/* Allocated by mrt_table_dump_init() */
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pool *pool; /* Pool for table dump */
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linpool *linpool; /* Temporary linear pool */
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linpool *peer_lp; /* Linear pool for peer entries in peer_hash */
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buffer buf; /* Buffer for MRT messages */
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HASH(struct mrt_peer_entry) peer_hash; /* Hash for peers to find the index */
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struct rtable *table; /* Processed table, NULL initially */
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struct fib_iterator fit; /* Iterator in processed table */
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int table_open; /* Whether iterator is linked */
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int ipv4; /* Processed table is IPv4 */
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int add_path; /* Current message subtype is *_ADDPATH */
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int want_add_path; /* Want *_ADDPATH message later */
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int max; /* Decreasing counter of dumped routes */
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u32 seqnum; /* MRT message sequence number */
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btime time_offset; /* Time offset between monotonic and real time */
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struct bgp_write_state *bws; /* */
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u16 peer_count; /* Number of peers */
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u32 peer_count_offset; /* Buffer offset to store peer_count later */
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u16 entry_count; /* Number of RIB Entries */
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u32 entry_count_offset; /* Buffer offset to store entry_count later */
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struct rfile *file; /* tracking for mrt table dump file */
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int fd;
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};
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struct mrt_bgp_data {
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uint peer_as;
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uint local_as;
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uint index;
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uint af;
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ip_addr peer_ip;
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ip_addr local_ip;
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byte *message;
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uint msg_len;
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uint old_state;
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uint new_state;
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u8 as4;
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u8 add_path;
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};
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#define MRT_HDR_LENGTH 12 /* MRT Timestamp + MRT Type + MRT Subtype + MRT Load Length */
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#define MRT_PEER_TYPE_32BIT_ASN 2 /* MRT Table Dump: Peer Index Table: Peer Type: Use 32bit ASN */
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#define MRT_PEER_TYPE_IPV6 1 /* MRT Table Dump: Peer Index Table: Peer Type: Use IPv6 IP Address */
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#define MRT_ATTR_BUFFER_SIZE 65536
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/* MRT Types */
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#define MRT_TABLE_DUMP_V2 13
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#define MRT_BGP4MP 16
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/* MRT Table Dump v2 Subtypes */
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#define MRT_PEER_INDEX_TABLE 1
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#define MRT_RIB_IPV4_UNICAST 2
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#define MRT_RIB_IPV4_MULTICAST 3
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#define MRT_RIB_IPV6_UNICAST 4
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#define MRT_RIB_IPV6_MULTICAST 5
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#define MRT_RIB_GENERIC 6
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#define MRT_RIB_IPV4_UNICAST_ADDPATH 8
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#define MRT_RIB_IPV4_MULTICAST_ADDPATH 9
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#define MRT_RIB_IPV6_UNICAST_ADDPATH 10
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#define MRT_RIB_IPV6_MULTICAST_ADDPATH 11
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#define MRT_RIB_GENERIC_ADDPATH 12
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/* MRT BGP4MP Subtypes */
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#define MRT_BGP4MP_MESSAGE 1
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#define MRT_BGP4MP_MESSAGE_AS4 4
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#define MRT_BGP4MP_STATE_CHANGE_AS4 5
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#define MRT_BGP4MP_MESSAGE_LOCAL 6
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#define MRT_BGP4MP_MESSAGE_AS4_LOCAL 7
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#define MRT_BGP4MP_MESSAGE_ADDPATH 8
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#define MRT_BGP4MP_MESSAGE_AS4_ADDPATH 9
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#define MRT_BGP4MP_MESSAGE_LOCAL_ADDPATH 10
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#define MRT_BGP4MP_MESSAGE_AS4_LOCAL_ADDPATH 11
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#ifdef CONFIG_MRT
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void mrt_dump_cmd(struct mrt_dump_data *d);
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void mrt_dump_bgp_message(struct mrt_bgp_data *d);
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void mrt_dump_bgp_state_change(struct mrt_bgp_data *d);
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void mrt_check_config(struct proto_config *C);
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#else
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static inline void mrt_dump_bgp_message(struct mrt_bgp_data *d UNUSED) { }
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static inline void mrt_dump_bgp_state_change(struct mrt_bgp_data *d UNUSED) { }
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#endif
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#endif /* _BIRD_MRT_H_ */
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