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c18e6dd58d
SNMP state changes are now handled by snmp_set_state() functions. The registration structure and related variables are renamed to remove confusion. Manipulation of BGP peers, a reference to BGP protocol structures, is improved by new functions that encapsulate raw hash table macros (moved from snmp.h). IPv4 addresses now used by bgp_mib.c because BGP4-MIB does not support IPv6 addresses. Configuration grammar rules are revised. We now use DBG() and TRACE() macros to output information about SNMP state chagnes and about received and transmitted packets. Pieces of old code are removed, minor bugfixes are included. Large debug string array are removed.
142 lines
3.0 KiB
C
142 lines
3.0 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/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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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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ip_addr local_ip;
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ip_addr remote_ip;
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u16 local_port;
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u16 remote_port;
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ip_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;
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u32 bonds;
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const char *description;
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list bgp_entries;
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// TODO add support for subagent oid identification
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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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ip_addr local_ip;
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ip_addr remote_ip;
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u16 local_port;
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u16 remote_port;
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ip_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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void *last_header; /* points to partial PDU header */
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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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timer *ping_timer;
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btime startup_delay;
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timer *startup_timer;
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u8 state;
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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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void snmp_sock_disconnect(struct snmp_proto *p, int reconnect);
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void snmp_set_state(struct snmp_proto *p, enum snmp_proto_state state);
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#endif
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