diff options
Diffstat (limited to 'proto/mrt/mrt.h')
| -rw-r--r-- | proto/mrt/mrt.h | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/proto/mrt/mrt.h b/proto/mrt/mrt.h new file mode 100644 index 00000000..3f13a859 --- /dev/null +++ b/proto/mrt/mrt.h @@ -0,0 +1,156 @@ +/* + * BIRD -- Multi-Threaded Routing Toolkit (MRT) Protocol + * + * (c) 2017--2018 Ondrej Zajicek <santiago@crfreenet.org> + * (c) 2017--2018 CZ.NIC z.s.p.o. + * + * Can be freely distributed and used under the terms of the GNU GPL. + */ + +#ifndef _BIRD_MRT_H_ +#define _BIRD_MRT_H_ + +#include "nest/bird.h" +#include "nest/protocol.h" +#include "lib/lists.h" +#include "nest/route.h" +#include "lib/event.h" +#include "lib/hash.h" + + +struct mrt_config { + struct proto_config c; + + struct rtable_config *table_cf; + const char *table_expr; + struct filter *filter; + const char *filename; + uint period; + int always_add_path; +}; + +struct mrt_proto { + struct proto p; + timer *timer; + event *event; + + struct mrt_target *file; + struct mrt_table_dump_state *table_dump; +}; + +struct mrt_dump_data { + const char *table_expr; + struct rtable *table_ptr; + struct filter *filter; + char *filename; +}; + +struct mrt_peer_entry { + u32 index; + u32 peer_id; + u32 peer_as; + ip_addr peer_ip; + struct mrt_peer_entry *next; +}; + +struct mrt_table_dump_state { + struct mrt_proto *proto; /* Protocol for regular MRT dumps (or NULL) */ + struct cli *cli; /* CLI for irregular MRT dumps (or NULL) */ + struct config *config; /* Config valid during start of dump, locked */ + + /* Configuration information */ + const char *table_expr; /* Wildcard for table name (or NULL) */ + struct rtable *table_ptr; /* Explicit table (or NULL) */ + struct filter *filter; /* Optional filter */ + const char *filename; /* Filename pattern */ + int always_add_path; /* Always use *_ADDPATH message subtypes */ + + /* Allocated by mrt_table_dump_init() */ + pool *pool; /* Pool for table dump */ + linpool *linpool; /* Temporary linear pool */ + linpool *peer_lp; /* Linear pool for peer entries in peer_hash */ + buffer buf; /* Buffer for MRT messages */ + + HASH(struct mrt_peer_entry) peer_hash; /* Hash for peers to find the index */ + + struct rtable *table; /* Processed table, NULL initially */ + struct fib_iterator fit; /* Iterator in processed table */ + int table_open; /* Whether iterator is linked */ + + int add_path; /* Current message subtype is *_ADDPATH */ + int want_add_path; /* Want *_ADDPATH message later */ + int max; /* Decreasing counter of dumped routes */ + u32 seqnum; /* MRT message sequence number */ + bird_clock_t time_offset; /* Time offset between monotonic and real time */ + + u16 peer_count; /* Number of peers */ + u32 peer_count_offset; /* Buffer offset to store peer_count later */ + u16 entry_count; /* Number of RIB Entries */ + u32 entry_count_offset; /* Buffer offset to store entry_count later */ + + struct rfile *file; /* tracking for mrt table dump file */ + int fd; +}; + +struct mrt_bgp_data { + uint peer_as; + uint local_as; + uint index; + uint af; + ip_addr peer_ip; + ip_addr local_ip; + byte *message; + uint msg_len; + uint old_state; + uint new_state; + u8 as4; + u8 add_path; +}; + + +#define MRT_HDR_LENGTH 12 /* MRT Timestamp + MRT Type + MRT Subtype + MRT Load Length */ +#define MRT_PEER_TYPE_32BIT_ASN 2 /* MRT Table Dump: Peer Index Table: Peer Type: Use 32bit ASN */ +#define MRT_PEER_TYPE_IPV6 1 /* MRT Table Dump: Peer Index Table: Peer Type: Use IPv6 IP Address */ + +#define MRT_ATTR_BUFFER_SIZE 65536 + +/* MRT Types */ +#define MRT_TABLE_DUMP_V2 13 +#define MRT_BGP4MP 16 + +/* MRT Table Dump v2 Subtypes */ +#define MRT_PEER_INDEX_TABLE 1 +#define MRT_RIB_IPV4_UNICAST 2 +#define MRT_RIB_IPV4_MULTICAST 3 +#define MRT_RIB_IPV6_UNICAST 4 +#define MRT_RIB_IPV6_MULTICAST 5 +#define MRT_RIB_GENERIC 6 +#define MRT_RIB_IPV4_UNICAST_ADDPATH 8 +#define MRT_RIB_IPV4_MULTICAST_ADDPATH 9 +#define MRT_RIB_IPV6_UNICAST_ADDPATH 10 +#define MRT_RIB_IPV6_MULTICAST_ADDPATH 11 +#define MRT_RIB_GENERIC_ADDPATH 12 + +/* MRT BGP4MP Subtypes */ +#define MRT_BGP4MP_MESSAGE 1 +#define MRT_BGP4MP_MESSAGE_AS4 4 +#define MRT_BGP4MP_STATE_CHANGE_AS4 5 +#define MRT_BGP4MP_MESSAGE_LOCAL 6 +#define MRT_BGP4MP_MESSAGE_AS4_LOCAL 7 +#define MRT_BGP4MP_MESSAGE_ADDPATH 8 +#define MRT_BGP4MP_MESSAGE_AS4_ADDPATH 9 +#define MRT_BGP4MP_MESSAGE_LOCAL_ADDPATH 10 +#define MRT_BGP4MP_MESSAGE_AS4_LOCAL_ADDPATH 11 + + +#ifdef CONFIG_MRT +void mrt_dump_cmd(struct mrt_dump_data *d); +void mrt_dump_bgp_message(struct mrt_bgp_data *d); +void mrt_dump_bgp_state_change(struct mrt_bgp_data *d); +void mrt_check_config(struct proto_config *C); +#else +static inline void mrt_dump_bgp_message(struct mrt_bgp_data *d UNUSED) { } +static inline void mrt_dump_bgp_state_change(struct mrt_bgp_data *d UNUSED) { } +#endif + +#endif /* _BIRD_MRT_H_ */ |