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basichost: use autonatv2 to verify reachability (#3231)

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This introduces addrsReachabilityTracker that tracks reachability on
a set of addresses. It probes reachability for addresses periodically
and has an exponential backoff in case there are too many errors
or we don't have any valid autonatv2 peer.

There's no smartness in the address selection logic currently. We just
test all provided addresses. It also doesn't use the addresses provided
by `AddrsFactory`, so currently there's no way to get a user provided
address tested for reachability, something that would be a problem for
dns addresses. I intend to introduce an alternative to
`AddrsFactory`, something like, `AnnounceAddrs(addrs []ma.Multiaddr)`
that's just appended to the set of addresses that we have, and check
reachability for those addresses.

There's only one method exposed in the BasicHost right now that's
`ReachableAddrs() []ma.Multiadd`r that returns the host's reachable
addrs. Users can also use the event `EvtHostReachableAddrsChanged`
to be notified when any addrs reachability changes.
This commit is contained in:
sukun
2025-06-03 17:13:56 +05:30
committed by GitHub
parent 31c8c83308
commit fb1d9512e8
15 changed files with 2420 additions and 321 deletions
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32
config/config.go
View File

@@ -33,6 +33,7 @@ import (
routed "github.com/libp2p/go-libp2p/p2p/host/routed"
"github.com/libp2p/go-libp2p/p2p/net/swarm"
tptu "github.com/libp2p/go-libp2p/p2p/net/upgrader"
"github.com/libp2p/go-libp2p/p2p/protocol/autonatv2"
circuitv2 "github.com/libp2p/go-libp2p/p2p/protocol/circuitv2/client"
relayv2 "github.com/libp2p/go-libp2p/p2p/protocol/circuitv2/relay"
"github.com/libp2p/go-libp2p/p2p/protocol/holepunch"
@@ -413,15 +414,7 @@ func (cfg *Config) addTransports() ([]fx.Option, error) {
return fxopts, nil
}
func (cfg *Config) newBasicHost(swrm *swarm.Swarm, eventBus event.Bus) (*bhost.BasicHost, error) {
var autonatv2Dialer host.Host
if cfg.EnableAutoNATv2 {
ah, err := cfg.makeAutoNATV2Host()
if err != nil {
return nil, err
}
autonatv2Dialer = ah
}
func (cfg *Config) newBasicHost(swrm *swarm.Swarm, eventBus event.Bus, an *autonatv2.AutoNAT) (*bhost.BasicHost, error) {
h, err := bhost.NewHost(swrm, &bhost.HostOpts{
EventBus: eventBus,
ConnManager: cfg.ConnManager,
@@ -437,8 +430,7 @@ func (cfg *Config) newBasicHost(swrm *swarm.Swarm, eventBus event.Bus) (*bhost.B
EnableMetrics: !cfg.DisableMetrics,
PrometheusRegisterer: cfg.PrometheusRegisterer,
DisableIdentifyAddressDiscovery: cfg.DisableIdentifyAddressDiscovery,
EnableAutoNATv2: cfg.EnableAutoNATv2,
AutoNATv2Dialer: autonatv2Dialer,
AutoNATv2: an,
})
if err != nil {
return nil, err
@@ -517,6 +509,24 @@ func (cfg *Config) NewNode() (host.Host, error) {
})
return sw, nil
}),
fx.Provide(func() (*autonatv2.AutoNAT, error) {
if !cfg.EnableAutoNATv2 {
return nil, nil
}
ah, err := cfg.makeAutoNATV2Host()
if err != nil {
return nil, err
}
var mt autonatv2.MetricsTracer
if !cfg.DisableMetrics {
mt = autonatv2.NewMetricsTracer(cfg.PrometheusRegisterer)
}
autoNATv2, err := autonatv2.New(ah, autonatv2.WithMetricsTracer(mt))
if err != nil {
return nil, fmt.Errorf("failed to create autonatv2: %w", err)
}
return autoNATv2, nil
}),
fx.Provide(cfg.newBasicHost),
fx.Provide(func(bh *bhost.BasicHost) identify.IDService {
return bh.IDService()