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mirror of https://gitlab.nic.cz/labs/bird.git synced 2024-12-23 10:11:53 +00:00
bird/proto/snmp/snmp.c
2022-11-05 16:29:00 +01:00

344 lines
8.6 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.
*/
#include "nest/bird.h"
#include "nest/cli.h"
#include "nest/locks.h"
#include "lib/socket.h"
#include "lib/lists.h"
#include "snmp.h"
#include "subagent.h"
static void snmp_connected(sock *sk);
static void snmp_sock_err(sock *sk, int err);
static void snmp_ping_timer(struct timer *tm);
static void snmp_startup(struct snmp_proto *p);
static void snmp_startup_timeout(timer *t);
static void snmp_start_locked(struct object_lock *lock);
static struct proto *
snmp_init(struct proto_config *CF)
{
struct proto *P = proto_new(CF);
struct snmp_proto *p = SKIP_BACK(struct snmp_proto, p, P);
struct snmp_config *cf = SKIP_BACK(struct snmp_config, cf, CF);
p->rl_gen = (struct tbf) TBF_DEFAULT_LOG_LIMITS;
p->local_ip = cf->local_ip;
p->remote_ip = cf->remote_ip;
p->local_port = cf->local_port;
p->remote_port = cf->remote_port;
p->state = SNMP_INIT;
// p->timeout = cf->timeout;
p->timeout = 15;
log(L_INFO "snmp_reconfigure() lip: %I:%u rip: %I:%u",
cf->local_ip, cf->local_port, cf->remote_ip, cf->remote_port);
return P;
}
static void
snmp_startup_timeout(timer *t)
{
snmp_startup(t->data);
}
static void
snmp_startup(struct snmp_proto *p)
{
/* starting agentX communicaiton channel */
log(L_INFO "preparing lock");
struct object_lock *lock;
lock = p->lock = olock_new(p->p.pool);
lock->type = OBJLOCK_TCP;
lock->hook = snmp_start_locked;
lock->data = p;
olock_acquire(lock);
log(L_INFO "lock acquiring");
log(L_INFO "local ip: %I:%u, remote ip: %I:%u",
p->local_ip, p->local_port, p->remote_ip, p->remote_port);
}
static void
snmp_start_locked(struct object_lock *lock)
{
log(L_INFO "snmp_start_locked() - preparing socket ");
struct snmp_proto *p = lock->data;
sock *s = sk_new(p->p.pool);
s->type = SK_TCP_ACTIVE;
s->saddr = p->local_ip;
s->daddr = p->remote_ip;
s->dport = p->remote_port;
s->rbsize = SNMP_RX_BUFFER_SIZE;
s->tbsize = SNMP_TX_BUFFER_SIZE;
//s->tos = IP_PREC_INTERNET_CONTROL
//s->rx_hook = snmp_connected;
s->tx_hook = snmp_connected;
s->err_hook = snmp_sock_err;
p->sock = s;
s->data = p;
p->to_send = 0;
p->errs = 0;
snmp_startup(p);
if (sk_open(s) < 0)
log(L_ERR "Cannot open listening socket");
log(L_INFO "socket ready!, trying to connect");
}
static void
snmp_tx(sock *sk UNUSED)
{
log(L_INFO "snmp_tx() something, yay!");
}
static void
snmp_connected(sock *sk)
{
struct snmp_proto *p = sk->data;
log(L_INFO "snmp_connected() connection created");
byte *buf UNUSED = sk->rbuf;
sk->rx_hook = snmp_rx;
sk->tx_hook = snmp_tx;
snmp_start_subagent(p);
}
static void
snmp_sock_err(sock *sk, int err)
{
log(L_INFO "snmp_sock_err() %s - err no: %d", strerror(err), err);
struct snmp_proto *p = sk->data;
tm_stop(p->ping_timer);
rfree(p->sock);
p->sock = NULL;
p->state = SNMP_ERR;
tm_start(p->startup_timer, 15 S);
}
static int
snmp_start(struct proto *P)
{
log(L_INFO "snmp_start() - starting timer (almost)");
struct snmp_proto *p = (void *) P;
struct snmp_config *cf = (struct snmp_config *) P->cf;
p->startup_timer = tm_new_init(p->p.pool, snmp_startup_timeout, p, 0, 0);
p->to_send = 0;
p->errs = 0;
p->pool = lp_new(p->p.pool);
p->bgp_trie = f_new_trie(p->pool, cf->bonds);
p->ping_timer = tm_new_init(p->p.pool, snmp_ping_timer, p, 0, 0);
tm_set(p->ping_timer, current_time() + 2 S);
/* starting agentX communicaiton channel */
log(L_INFO "preparing lock");
struct object_lock *lock;
lock = p->lock = olock_new(p->p.pool);
lock->type = OBJLOCK_TCP;
lock->hook = snmp_start_locked;
lock->data = p;
olock_acquire(lock);
log(L_INFO "lock acquired");
log(L_INFO "local ip: %I:%u, remote ip: %I:%u",
p->local_ip, p->local_port, p->remote_ip, p->remote_port);
/* create copy of bonds to bgp */
HASH_INIT(p->bgp_hash, p->p.pool, 10);
struct snmp_bond *b;
WALK_LIST(b, cf->bgp_entries)
{
struct bgp_config *bc = (struct bgp_config *) b->proto;
if (bc && !ipa_zero(bc->remote_ip))
{
struct snmp_bgp_peer *peer =
mb_allocz(p->p.pool, sizeof(struct snmp_bgp_peer));
peer->config = (struct bgp_config *) b->proto;
peer->peer_ip = bc->remote_ip;
struct net_addr *net = mb_allocz(p->p.pool, sizeof(struct net_addr));
net_fill_ip4(net, ipa_to_ip4(peer->peer_ip), IP4_MAX_PREFIX_LENGTH);
trie_add_prefix(p->bgp_trie, net, IP4_MAX_PREFIX_LENGTH, IP4_MAX_PREFIX_LENGTH);
HASH_INSERT(p->bgp_hash, SNMP_HASH, peer);
}
}
return PS_START;
}
static int
snmp_reconfigure(struct proto *P, struct proto_config *CF)
{
struct snmp_proto *p = SKIP_BACK(struct snmp_proto, p, P);
struct snmp_config *cf = SKIP_BACK(struct snmp_config, cf, CF);
p->local_ip = cf->local_ip;
p->remote_ip = cf->remote_ip;
p->local_port = cf->local_port;
p->remote_port = cf->remote_port;
p->local_as = cf->local_as;
p->timeout = 15;
/* TODO walk all bind protocols and find their (new) IP
to update HASH table */
log(L_INFO "snmp_reconfigure() lip: %I:%u rip: %I:%u",
p->local_ip, p->local_port, p->remote_ip, p->remote_port);
return 1;
}
static void snmp_show_proto_info(struct proto *P)
{
//struct snmp_proto *sp = (void *) P;
struct snmp_config *c = (void *) P->cf;
cli_msg(-1006, " BGP peers");
struct snmp_bond *bond;
WALK_LIST(bond, c->bgp_entries)
{
struct proto_config *cf = P->cf;
struct bgp_config *bcf = (struct bgp_config *) cf;
struct proto *p = cf->proto;
struct bgp_proto *bp = (struct bgp_proto *) cf->proto;
struct bgp_conn *conn = bp->conn;
cli_msg(-1006, " name: %s", cf->name);
cli_msg(-1006, "");
cli_msg(-1006, " rem. identifier: %u", bp->remote_id);
// learn more !!
cli_msg(-1006, " admin status: %s", (p->disabled) ? "start" :
"stop");
// version ?
cli_msg(-1006, " version: 4");
cli_msg(-1006, " local ip: %u", bcf->local_ip);
cli_msg(-1006, " remote ip: %u", bcf->remote_ip);
cli_msg(-1006, " local port: %u", bcf->local_port);
cli_msg(-1006, " remote port: %u", bcf->remote_port);
/*
if (conn) {
cli_msg(-1006, " state: %u", conn->state);
cli_msg(-1006, " remote as: %u", conn->remote_caps->as4_number);
}
*/
cli_msg(-1006, " in updates: %u", bp->stats.rx_updates);
cli_msg(-1006, " out updates: %u", bp->stats.tx_updates);
cli_msg(-1006, " in total: %u", bp->stats.rx_messages);
cli_msg(-1006, " out total: %u", bp->stats.tx_messages);
cli_msg(-1006, " fsm transitions: %u",
bp->stats.fsm_established_transitions);
// not supported yet
cli_msg(-1006, " fsm total time: --");
cli_msg(-1006, " retry interval: %u", bcf->connect_retry_time);
/*
if (conn) {
cli_msg(-1006, " hold time: %u", conn->hold_time);
cli_msg(-1006, " keep alive: %u", conn->keepalive_time );
}
*/
cli_msg(-1006, " hold configurated: %u", bcf->hold_time );
cli_msg(-1006, " keep alive config: %u", bcf->keepalive_time );
// unknown
cli_msg(-1006, " min AS origin. int.: --");
cli_msg(-1006, " min route advertisement: %u", 0 );
cli_msg(-1006, " in update elapsed time: %u", 0 );
if (!conn)
cli_msg(-1006, " no default connection");
cli_msg(-1006, " outgoinin_conn state %u", bp->outgoing_conn.state + 1);
cli_msg(-1006, " incoming_conn state: %u", bp->incoming_conn.state + 1);
}
}
static void
snmp_postconfig(struct proto_config *CF)
{
if (((struct snmp_config *) CF)->local_as == 0)
cf_error("local as not specified");
}
static void
snmp_ping_timer(struct timer *tm)
{
log(L_INFO "snmp_ping_timer() ");
struct snmp_proto *p = tm->data;
if (p->state == SNMP_CONN)
{
snmp_ping(p);
}
//tm_set(tm, current_time() + (15 S));
tm_set(tm, current_time() + 15 S);
}
static int
snmp_shutdown(struct proto *P)
{
struct snmp_proto *p = SKIP_BACK(struct snmp_proto, p, P);
p->state = SNMP_INIT;
tm_stop(p->ping_timer);
tm_stop(p->startup_timer);
snmp_stop_subagent(p);
return PS_DOWN;
}
struct protocol proto_snmp = {
.name = "Snmp",
.template = "snmp%d",
.channel_mask = NB_ANY,
.proto_size = sizeof(struct snmp_proto),
.config_size = sizeof(struct snmp_config),
.postconfig = snmp_postconfig,
.init = snmp_init,
.start = snmp_start,
.reconfigure = snmp_reconfigure,
.shutdown = snmp_shutdown,
.show_proto_info = snmp_show_proto_info,
};
void
snmp_build(void)
{
proto_build(&proto_snmp);
}