70 lines
1.8 KiB
Go
70 lines
1.8 KiB
Go
// +build !linux
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package tcp
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import (
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"context"
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"net"
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"time"
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)
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// Checker is a fake implementation.
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type Checker struct {
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zeroLinger bool
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isReady chan struct{}
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}
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// NewChecker creates a Checker with linger set to zero.
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func NewChecker() *Checker {
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return NewCheckerZeroLinger(true)
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}
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// NewCheckerZeroLinger creates a Checker with zeroLinger set to given value.
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func NewCheckerZeroLinger(zeroLinger bool) *Checker {
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isReady := make(chan struct{})
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close(isReady)
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return &Checker{zeroLinger: zeroLinger, isReady: isReady}
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}
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// CheckingLoop is unnecessary on this platform.
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func (c *Checker) CheckingLoop(ctx context.Context) error {
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<-ctx.Done()
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return nil
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}
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// CheckAddr performs a TCP check with given TCP address and timeout.
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// NOTE: zeroLinger is ignored on non-POSIX operating systems because
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// net.TCPConn.SetLinger is only implemented in src/net/sockopt_posix.go.
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func (c *Checker) CheckAddr(addr string, timeout time.Duration) error {
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return c.CheckAddrZeroLinger(addr, timeout, c.zeroLinger)
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}
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// CheckAddrZeroLinger is CheckerAddr with a zeroLinger parameter.
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func (c *Checker) CheckAddrZeroLinger(addr string, timeout time.Duration, zeroLinger bool) error {
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conn, err := net.DialTimeout("tcp", addr, timeout)
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if conn != nil {
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if zeroLinger {
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// Simply ignore the error since this is a fake implementation.
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conn.(*net.TCPConn).SetLinger(0)
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}
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conn.Close()
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}
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if opErr, ok := err.(*net.OpError); ok {
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if opErr.Timeout() {
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return ErrTimeout
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}
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}
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return err
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}
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// IsReady is always true on this platform.
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func (c *Checker) IsReady() bool { return true }
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// WaitReady returns a closed chan on this platform.
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func (c *Checker) WaitReady() <-chan struct{} {
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return c.isReady
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}
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// Close is unnecessary on this platform.
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func (c *Checker) Close() error { return nil }
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