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153 lines
3.3 KiB
C
153 lines
3.3 KiB
C
/*
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* BIRD -- Simple Network Management Protocol (SNMP)
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*
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* (c) 2022 Vojtech Vilimek <vojtech.vilimek@nic.cz>
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* (c) 2022 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_SNMP_H_
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#define _BIRD_SNMP_H_
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#include "lib/ip.h"
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#include "lib/socket.h"
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#include "lib/resource.h"
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#include "lib/timer.h"
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#include "nest/bird.h"
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#include "nest/protocol.h"
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#include "filter/data.h"
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#include "proto/bgp/bgp.h"
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#define SNMP_UNDEFINED 0
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#define SNMP_BGP 1
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#define SNMP_OSPF 2
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#define SNMP_INVALID 255
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#define SNMP_PORT 705
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#define SNMP_RX_BUFFER_SIZE 8192
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#define SNMP_TX_BUFFER_SIZE 8192
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#define SNMP_PKT_SIZE_MAX 8192
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enum snmp_proto_state {
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SNMP_DOWN = 0,
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SNMP_INIT = 1,
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SNMP_LOCKED,
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SNMP_OPEN,
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SNMP_REGISTER,
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SNMP_CONN,
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SNMP_STOP,
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SNMP_RESET,
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};
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struct snmp_bond {
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node n;
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struct proto_config *config;
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u8 type;
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};
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struct snmp_config {
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struct proto_config cf;
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ip4_addr local_ip;
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ip4_addr remote_ip;
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u16 local_port;
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u16 remote_port;
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ip4_addr bgp_local_id; /* BGP4-MIB related fields */
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u32 bgp_local_as;
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btime timeout;
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btime startup_delay;
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u8 priority;
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//struct iface *iface; TODO
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u32 bonds;
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const char *description; /* The order of fields is not arbitrary */
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list bgp_entries; /* We want dynamically allocated fields to be
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* at the end of the config struct.
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* We use this fact to check differences of
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* nonallocated parts of configs with memcpy
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*/
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//const struct oid *oid_identifier; TODO
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};
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#define SNMP_BGP_P_REGISTERING 0x01
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#define SNMP_BGP_P_REGISTERED 0x02
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struct snmp_bgp_peer {
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const struct bgp_proto *bgp_proto;
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ip4_addr peer_ip; /* used as hash key */
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struct snmp_bgp_peer *next;
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};
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struct snmp_registration {
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node n;
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u8 mib_class;
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u32 session_id;
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u32 transaction_id;
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u32 packet_id;
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struct oid *oid;
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};
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struct snmp_registered_oid {
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node n;
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struct oid *oid;
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};
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struct snmp_proto {
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struct proto p;
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struct object_lock *lock;
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pool *pool; /* a shortcut to the procotol mem. pool */
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linpool *lp; /* linpool for bgp_trie nodes */
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slab *request_storage; /* manages storages storage for incomming requests */
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enum snmp_proto_state state;
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ip4_addr local_ip;
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ip4_addr remote_ip;
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u16 local_port;
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u16 remote_port;
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ip4_addr bgp_local_id; /* BGP4-MIB related fields */
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u32 bgp_local_as;
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sock *sock;
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btime timeout; /* timeout is part of MIB registration. It
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specifies how long should the master
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agent wait for request responses. */
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u32 session_id;
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u32 transaction_id;
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u32 packet_id;
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uint registrations_to_ack; /* counter of pending responses to register-pdu */
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list registration_queue; /* list containing snmp_register records */
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list bgp_registered; /* list of currently registered bgp oids
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* (struct snmp_registered_oid) */
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// map
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struct f_trie *bgp_trie;
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HASH(struct snmp_bgp_peer) bgp_hash;
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struct tbf rl_gen;
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list pending_pdus;
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timer *ping_timer;
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btime startup_delay;
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timer *startup_timer;
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};
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//void snmp_tx(sock *sk);
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void snmp_startup(struct snmp_proto *p);
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void snmp_connected(sock *sk);
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void snmp_startup_timeout(timer *tm);
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void snmp_reconnect(timer *tm);
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int snmp_set_state(struct snmp_proto *p, enum snmp_proto_state state);
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void snmp_reset(struct snmp_proto *p);
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#endif
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