/* * BIRD -- Simple Network Management Protocol (SNMP) * * (c) 2022 Vojtech Vilimek * (c) 2022 CZ.NIC z.s.p.o * * Can be freely distributed and used under the terms of the GNU GPL. */ #ifndef _BIRD_SNMP_H_ #define _BIRD_SNMP_H_ #include "lib/ip.h" #include "lib/socket.h" #include "lib/timer.h" #include "nest/bird.h" #include "nest/protocol.h" #include "filter/data.h" #include "proto/bgp/bgp.h" #define SNMP_UNDEFINED 0 #define SNMP_BGP 1 #define SNMP_OSPF 2 #define SNMP_INVALID 255 #define SNMP_PORT 705 #define SNMP_RX_BUFFER_SIZE 8192 #define SNMP_TX_BUFFER_SIZE 8192 enum snmp_proto_state { SNMP_INIT = 1, SNMP_LOCKED, SNMP_OPEN, SNMP_REGISTER, SNMP_CONN, SNMP_STOP, SNMP_DOWN, }; /* hash table macros */ #define SNMP_HASH_KEY(n) n->peer_ip #define SNMP_HASH_NEXT(n) n->next #define SNMP_HASH_EQ(ip1, ip2) ipa_equal(ip1, ip2) #define SNMP_HASH_FN(ip) ipa_hash(ip) #define SNMP_HASH_LESS4(ip1, ip2) ip4_less(ip1, ip2) #define SNMP_HASH_LESS6(ip1, ip2) ip6_less(ip1, ip2) /* hash table only store ip4 addresses */ #define SNMP_HASH_LESS(ip1, ip2) SNMP_HASH_LESS4(ip1,ip2) /* context hash table macros */ #define SNMP_H_CONTEXT_KEY(c) c->context #define SNMP_H_CONTEXT_NEXT(c) c->next #define SNMP_H_CONTEXT_EQ(s1,s2) strcmp(s1,s2) #define SNMP_H_CONTEXT_FN(s) mem_hash(s, strlen(s)) struct snmp_bond { node n; struct proto_config *proto; u8 type; const char *context; }; struct snmp_config { struct proto_config cf; ip_addr local_ip; ip_addr remote_ip; u16 local_port; u16 remote_port; ip_addr bgp_local_id; /* BGP4-MIB related fields */ u32 bgp_local_as; u8 timeout; u8 priority; //struct iface *iface; u32 bonds; uint contexts; /* Number of all conetexts including the default */ const char *description; list bgp_entries; // TODO add support for subagent oid identification }; #define SNMP_BGP_P_REGISTERING 0x01 #define SNMP_BGP_P_REGISTERED 0x02 struct snmp_bgp_peer { const struct bgp_config *config; ip_addr peer_ip; uint context_id; u8 flags; struct snmp_bgp_peer *next; }; struct snmp_register { node n; u8 mib_class; u32 session_id; u32 transaction_id; u32 packet_id; struct oid *oid; }; struct snmp_registered_oid { node n; struct oid *oid; }; struct snmp_context { const char *context; /* string name */ //uint length; /* strlen() of name */ uint context_id; u8 flags; struct snmp_context *next; }; struct snmp_proto { struct proto p; struct object_lock *lock; pool *pool; /* a shortcut to the procotol mem. pool */ linpool *lp; /* linpool for bgp_trie nodes */ ip_addr local_ip; ip_addr remote_ip; u16 local_port; u16 remote_port; ip_addr bgp_local_id; /* BGP4-MIB related fields */ u32 bgp_local_as; sock *sock; u8 timeout; /* timeout is part of MIB registration. It specifies how long should the master agent wait for request responses. */ u32 session_id; u32 transaction_id; u32 packet_id; uint register_to_ack; /* counter of pending responses to register-pdu */ list register_queue; /* list containing snmp_register records */ list bgp_registered; /* list of currently registered bgp oids * (struct snmp_registered_oid) */ // map struct f_trie *bgp_trie; HASH(struct snmp_bgp_peer) bgp_hash; HASH(struct snmp_context) context_hash; struct snmp_context **context_id_map; uint context_id_map_size; uint context_max; struct tbf rl_gen; timer *ping_timer; uint startup_delay; timer *startup_timer; u8 state; uint to_send; uint errs; }; //void snmp_tx(sock *sk); void snmp_startup(struct snmp_proto *p); void snmp_connected(sock *sk); void snmp_startup_timeout(timer *tm); void snmp_reconnect(timer *tm); #endif