port

package

v0.0.0-...-c97221a Latest Latest Go to latest Published: Apr 30, 2024 License: GPL-3.0 Imports: 14 Imported by: 0

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var ErrEmptyServerAddressList = errors.New("empty server address list specified")

ErrEmptyServerAddressList indicates there are no servers to get response from

func GloballyReachable(ctx context.Context, port Port, echoServerAddresses []string, timeout time.Duration) (bool, error)

GloballyReachable checks if UDP port is reachable from global Internet, performing probe against asymmetric UDP echo server

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

Pool hands out ports for service use

func NewFixedRangePool(r Range) *Pool

NewFixedRangePool creates a fixed size pool from port.Range

func (pool *Pool) Acquire() (Port, error)

Acquire returns an unused port in pool's range

func (pool *Pool) AcquireMultiple(n int) (ports []Port, err error)

AcquireMultiple returns n unused ports from pool's range.

type Port int

Port (networking)

func (p Port) Num() int

Num returns port's numeric value

type Range struct {
	Start, End int
}

Range represents a networking port range

func ParseRange(rangeExpr string) (Range, error)

ParseRange parses port range expression, e.g. "1000:1200" into Range struct

func (r *Range) Capacity() int

Capacity returns range capacity

func (r *Range) String() string

String returns port range expression, e.g. "1000:1200"

type ServicePortSupplier interface {
	Acquire() (Port, error)
	AcquireMultiple(n int) (ports []Port, err error)
}

ServicePortSupplier provides port needed to run a service on