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bird 1.6.8

    1: /*
    2:  *	BIRD -- Multi-Threaded Routing Toolkit (MRT) Protocol
    3:  *
    4:  *	(c) 2017--2018 Ondrej Zajicek <santiago@crfreenet.org>
    5:  *	(c) 2017--2018 CZ.NIC z.s.p.o.
    6:  *
    7:  *	Can be freely distributed and used under the terms of the GNU GPL.
    8:  */
    9: 
   10: #ifndef _BIRD_MRT_H_
   11: #define _BIRD_MRT_H_
   12: 
   13: #include "nest/bird.h"
   14: #include "nest/protocol.h"
   15: #include "lib/lists.h"
   16: #include "nest/route.h"
   17: #include "lib/event.h"
   18: #include "lib/hash.h"
   19: 
   20: 
   21: struct mrt_config {
   22:   struct proto_config c;
   23: 
   24:   struct rtable_config *table_cf;
   25:   const char *table_expr;
   26:   struct filter *filter;
   27:   const char *filename;
   28:   uint period;
   29:   int always_add_path;
   30: };
   31: 
   32: struct mrt_proto {
   33:   struct proto p;
   34:   timer *timer;
   35:   event *event;
   36: 
   37:   struct mrt_target *file;
   38:   struct mrt_table_dump_state *table_dump;
   39: };
   40: 
   41: struct mrt_dump_data {
   42:   const char *table_expr;
   43:   struct rtable *table_ptr;
   44:   struct filter *filter;
   45:   char *filename;
   46: };
   47: 
   48: struct mrt_peer_entry {
   49:   u32 index;
   50:   u32 peer_id;
   51:   u32 peer_as;
   52:   ip_addr peer_ip;
   53:   struct mrt_peer_entry *next;
   54: };
   55: 
   56: struct mrt_table_dump_state {
   57:   struct mrt_proto *proto;		/* Protocol for regular MRT dumps (or NULL) */
   58:   struct cli *cli;			/* CLI for irregular MRT dumps (or NULL) */
   59:   struct config *config;		/* Config valid during start of dump, locked */
   60: 
   61: 					/* Configuration information */
   62:   const char *table_expr;		/* Wildcard for table name (or NULL) */
   63:   struct rtable *table_ptr;		/* Explicit table (or NULL) */
   64:   struct filter *filter;		/* Optional filter */
   65:   const char *filename;			/* Filename pattern */
   66:   int always_add_path;			/* Always use *_ADDPATH message subtypes */
   67: 
   68:   /* Allocated by mrt_table_dump_init() */
   69:   pool *pool;				/* Pool for table dump */
   70:   linpool *linpool;			/* Temporary linear pool */
   71:   linpool *peer_lp;			/* Linear pool for peer entries in peer_hash */
   72:   buffer buf;				/* Buffer for MRT messages */
   73: 
   74:   HASH(struct mrt_peer_entry) peer_hash; /* Hash for peers to find the index */
   75: 
   76:   struct rtable *table;			/* Processed table, NULL initially */
   77:   struct fib_iterator fit;		/* Iterator in processed table */
   78:   int table_open;			/* Whether iterator is linked */
   79: 
   80:   int add_path;				/* Current message subtype is *_ADDPATH */
   81:   int want_add_path;			/* Want *_ADDPATH message later */
   82:   int max;				/* Decreasing counter of dumped routes */
   83:   u32 seqnum;				/* MRT message sequence number */
   84:   bird_clock_t time_offset;		/* Time offset between monotonic and real time */
   85: 
   86:   u16 peer_count;			/* Number of peers */
   87:   u32 peer_count_offset;		/* Buffer offset to store peer_count later */
   88:   u16 entry_count;			/* Number of RIB Entries */
   89:   u32 entry_count_offset;		/* Buffer offset to store entry_count later */
   90: 
   91:   struct rfile *file;			/* tracking for mrt table dump file */
   92:   int fd;
   93: };
   94: 
   95: struct mrt_bgp_data {
   96:   uint peer_as;
   97:   uint local_as;
   98:   uint index;
   99:   uint af;
  100:   ip_addr peer_ip;
  101:   ip_addr local_ip;
  102:   byte *message;
  103:   uint msg_len;
  104:   uint old_state;
  105:   uint new_state;
  106:   u8 as4;
  107:   u8 add_path;
  108: };
  109: 
  110: 
  111: #define MRT_HDR_LENGTH		12	/* MRT Timestamp + MRT Type + MRT Subtype + MRT Load Length */
  112: #define MRT_PEER_TYPE_32BIT_ASN	2	/* MRT Table Dump: Peer Index Table: Peer Type: Use 32bit ASN */
  113: #define MRT_PEER_TYPE_IPV6	1	/* MRT Table Dump: Peer Index Table: Peer Type: Use IPv6 IP Address */
  114: 
  115: #define MRT_ATTR_BUFFER_SIZE	65536
  116: 
  117: /* MRT Types */
  118: #define MRT_TABLE_DUMP_V2 	13
  119: #define MRT_BGP4MP		16
  120: 
  121: /* MRT Table Dump v2 Subtypes */
  122: #define MRT_PEER_INDEX_TABLE		1
  123: #define MRT_RIB_IPV4_UNICAST		2
  124: #define MRT_RIB_IPV4_MULTICAST		3
  125: #define MRT_RIB_IPV6_UNICAST		4
  126: #define MRT_RIB_IPV6_MULTICAST 		5
  127: #define MRT_RIB_GENERIC			6
  128: #define MRT_RIB_IPV4_UNICAST_ADDPATH	8
  129: #define MRT_RIB_IPV4_MULTICAST_ADDPATH	9
  130: #define MRT_RIB_IPV6_UNICAST_ADDPATH	10
  131: #define MRT_RIB_IPV6_MULTICAST_ADDPATH 	11
  132: #define MRT_RIB_GENERIC_ADDPATH		12
  133: 
  134: /* MRT BGP4MP Subtypes */
  135: #define MRT_BGP4MP_MESSAGE		1
  136: #define MRT_BGP4MP_MESSAGE_AS4		4
  137: #define MRT_BGP4MP_STATE_CHANGE_AS4	5
  138: #define MRT_BGP4MP_MESSAGE_LOCAL	6
  139: #define MRT_BGP4MP_MESSAGE_AS4_LOCAL	7
  140: #define MRT_BGP4MP_MESSAGE_ADDPATH	8
  141: #define MRT_BGP4MP_MESSAGE_AS4_ADDPATH	9
  142: #define MRT_BGP4MP_MESSAGE_LOCAL_ADDPATH	10
  143: #define MRT_BGP4MP_MESSAGE_AS4_LOCAL_ADDPATH	11
  144: 
  145: 
  146: #ifdef CONFIG_MRT
  147: void mrt_dump_cmd(struct mrt_dump_data *d);
  148: void mrt_dump_bgp_message(struct mrt_bgp_data *d);
  149: void mrt_dump_bgp_state_change(struct mrt_bgp_data *d);
  150: void mrt_check_config(struct proto_config *C);
  151: #else
  152: static inline void mrt_dump_bgp_message(struct mrt_bgp_data *d UNUSED) { }
  153: static inline void mrt_dump_bgp_state_change(struct mrt_bgp_data *d UNUSED) { }
  154: #endif
  155: 
  156: #endif	/* _BIRD_MRT_H_ */