mirror of https://github.com/hashicorp/consul
65 lines
1.3 KiB
Go
65 lines
1.3 KiB
Go
// Copyright (c) HashiCorp, Inc.
|
|
// SPDX-License-Identifier: MPL-2.0
|
|
|
|
package internal
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
)
|
|
|
|
// Listener implements the net.Listener interface and allows you to manually
|
|
// pass connections to it. This is useful when you need to accept connections
|
|
// and do something with them yourself first (e.g. handling our multiplexing
|
|
// scheme) before giving them to the gRPC server.
|
|
type Listener struct {
|
|
addr net.Addr
|
|
conns chan net.Conn
|
|
done chan struct{}
|
|
}
|
|
|
|
var _ net.Listener = (*Listener)(nil)
|
|
|
|
// NewListener creates a Listener with the given address.
|
|
func NewListener(addr net.Addr) *Listener {
|
|
return &Listener{
|
|
addr: addr,
|
|
conns: make(chan net.Conn),
|
|
done: make(chan struct{}),
|
|
}
|
|
|
|
}
|
|
|
|
// Handle makes the given connection available to Accept.
|
|
func (l *Listener) Handle(conn net.Conn) {
|
|
select {
|
|
case l.conns <- conn:
|
|
case <-l.done:
|
|
_ = conn.Close()
|
|
}
|
|
}
|
|
|
|
// Accept a connection.
|
|
func (l *Listener) Accept() (net.Conn, error) {
|
|
select {
|
|
case c := <-l.conns:
|
|
return c, nil
|
|
case <-l.done:
|
|
return nil, &net.OpError{
|
|
Op: "accept",
|
|
Net: l.addr.Network(),
|
|
Addr: l.addr,
|
|
Err: fmt.Errorf("listener closed"),
|
|
}
|
|
}
|
|
}
|
|
|
|
// Addr returns the listener's address.
|
|
func (l *Listener) Addr() net.Addr { return l.addr }
|
|
|
|
// Close the listener.
|
|
func (l *Listener) Close() error {
|
|
close(l.done)
|
|
return nil
|
|
}
|