nat

type Config struct {
	// Enabled controls whether NAT traversal is active.
	// Default: true (set by ApplyDefaults).
	Enabled bool `yaml:"enabled"`

	// STUNServers is the list of STUN server addresses (host:port).
	STUNServers []string `yaml:"stun_servers"`

	// RefreshInterval is the interval between STUN binding refreshes.
	// Must be at least 10s.
	RefreshInterval time.Duration `yaml:"refresh_interval"`

	// Timeout is the per-server STUN request timeout.
	// Must be positive.
	Timeout time.Duration `yaml:"timeout"`
}

type Discoverer struct {
	// contains filtered or unexported fields
}

type DiscoveryResult struct {
	Endpoint string // "ip:port" format
	NATType  NATType
}

type EndpointReporter interface {
	ReportEndpoint(ctx context.Context, nodeID string, req api.EndpointReport) (*api.EndpointResponse, error)
}

type MappedAddress struct {
	IP   net.IP
	Port int
}

type NATType string

type PeerUpdater interface {
	UpdatePeer(peer api.Peer) error
}

type STUNClient interface {
	Bind(ctx context.Context, serverAddr string, localPort int) (MappedAddress, error)
}

type UDPSTUNClient struct {
	Timeout time.Duration
}