mirror of
https://github.com/gravitational/teleport
synced 2024-10-22 18:23:25 +00:00
101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
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/*
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Copyright 2017 Gravitational, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package multiplexer
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import (
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"bufio"
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"context"
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"net"
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"github.com/gravitational/trace"
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)
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// Conn is a connection wrapper that supports
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// communicating remote address from proxy protocol
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// and replays first several bytes read during
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// protocol detection
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type Conn struct {
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net.Conn
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protocol int
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proxyLine *ProxyLine
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reader *bufio.Reader
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}
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// Read reads from connection
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func (c *Conn) Read(p []byte) (int, error) {
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return c.reader.Read(p)
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}
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// LocalAddr returns local address of the connection
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func (c *Conn) LocalAddr() net.Addr {
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if c.proxyLine != nil {
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return &c.proxyLine.Destination
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}
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return c.Conn.LocalAddr()
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}
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// RemoteAddr returns remote address of the connection
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func (c *Conn) RemoteAddr() net.Addr {
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if c.proxyLine != nil {
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return &c.proxyLine.Source
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}
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return c.Conn.RemoteAddr()
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}
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func newListener(parent context.Context, addr net.Addr) *Listener {
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context, cancel := context.WithCancel(parent)
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return &Listener{
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addr: addr,
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connC: make(chan *Conn),
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cancel: cancel,
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context: context,
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}
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}
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// Listener is a listener that receives
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// connections from multiplexer based on the connection type
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type Listener struct {
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addr net.Addr
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connC chan *Conn
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cancel context.CancelFunc
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context context.Context
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}
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// Addr returns listener addr, the address of multiplexer listener
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func (l *Listener) Addr() net.Addr {
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return l.addr
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}
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// Accept accepts connections from parent multiplexer listener
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func (l *Listener) Accept() (net.Conn, error) {
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select {
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case <-l.context.Done():
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return nil, trace.ConnectionProblem(nil, "listener is closed")
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case conn := <-l.connC:
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if conn == nil {
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return nil, trace.ConnectionProblem(nil, "listener is closed")
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}
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return conn, nil
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}
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}
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// Close closes the listener, connections to multiplexer will hang
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func (l *Listener) Close() error {
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l.cancel()
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return nil
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}
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