mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-04 02:21:02 +08:00
Ev Kontsevoy
95aa7f1e1c
ObeyTimeouts() facility was handling errors more arggessively than needed. So if you pass net.Conn implementation which does not support timeouts, it would simply fail on every read() and write() instead of ignoring them. Now it ignores them.
64 lines
1.9 KiB
Go
64 lines
1.9 KiB
Go
/*
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Copyright 2015 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 utils
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import (
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"net"
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"time"
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)
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// TimeoutConn wraps an existing net.Conn and adds read/write timeouts
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// for it, allowing to safely pass it into io.Copy()
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//
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// Usage example:
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// tc := utils.ObeyTimeouts(conn, time.Second * 30, "ssh connection")
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// io.Copy(tc, xxx)
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//
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type TimeoutConn struct {
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net.Conn
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TimeoutDuration time.Duration
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// Name is only useful for debugging/logging, it's a convenient
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// way to "name" every active connection
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Name string
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}
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// ObeyTimeouts wraps an existing network connection with timeout-obeying
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// Write() and Read()
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func ObeyTimeouts(conn net.Conn, timeout time.Duration, name string) net.Conn {
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return &TimeoutConn{
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Conn: conn,
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TimeoutDuration: timeout,
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Name: name,
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}
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}
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func (tc *TimeoutConn) Read(p []byte) (n int, err error) {
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// note: checking for errors here does not buy anything: some net.Conn interface
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// implementations (sshConn, pipe) simply return "not supported" error
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tc.Conn.SetReadDeadline(time.Now().Add(tc.TimeoutDuration))
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return tc.Conn.Read(p)
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}
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func (tc *TimeoutConn) Write(p []byte) (n int, err error) {
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// note: checking for errors here does not buy anything: some net.Conn interface
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// implementations (sshConn, pipe) simply return "not supported" error
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tc.Conn.SetWriteDeadline(time.Now().Add(tc.TimeoutDuration))
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return tc.Conn.Write(p)
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}
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