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bird/proto/snmp/snmp.h
2023-10-18 13:31:35 +02:00

179 lines
3.8 KiB
C

/*
* BIRD -- Simple Network Management Protocol (SNMP)
*
* (c) 2022 Vojtech Vilimek <vojtech.vilimek@nic.cz>
* (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;
struct linpool *pool;
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;
const struct snmp_context **context_id_map;
uint context_max;
struct tbf rl_gen;
timer *ping_timer;
uint startup_delay;
timer *startup_timer;
u8 state;
uint to_send;
uint errs;
/*
* if the packet hasn't been fully recieved, partial_reponse points
* into the TX buffer to the Response-PDU header (needed for packet payload)
*/
struct agentx_response *partial_response;
};
//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