mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-04 02:21:02 +08:00
Edoardo Spadolini
9d91466a0e
* Remove unused backend wrapper from Cache * Remove double printShutdownStatus * Fix readyz race condition * Test coverage for the readyz.monitor fix * Close listeners immediately in proxy.shutdown * Use and handle net.ErrClosed correctly This adapts utils.IsUseOfClosedNetworkError to check for net.ErrClosed even inside trace.Aggregate errors, makes it so that we always return something that would pass errors.Is(err, net.ErrClosed) when returning from a (net.Listener).Accept(), and handles closed listeners within our various Serve() loops so that we don't hit spurious backoff waits while shutting down. * Close listeners early and emitters late * Test coverage for the proxy listener changes * Revert some errors back to trace.ConnectionProblem * Reduce PR scope to just the proxy, add comments * Improve error logging.
73 lines
2.1 KiB
Go
73 lines
2.1 KiB
Go
/*
|
|
Copyright 2021 Gravitational, Inc.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package utils
|
|
|
|
import (
|
|
"errors"
|
|
"net"
|
|
"strings"
|
|
"syscall"
|
|
|
|
"github.com/gravitational/teleport/api/constants"
|
|
"github.com/gravitational/trace"
|
|
)
|
|
|
|
// IsUseOfClosedNetworkError returns true if the specified error
|
|
// indicates the use of a closed network connection.
|
|
func IsUseOfClosedNetworkError(err error) bool {
|
|
if err == nil {
|
|
return false
|
|
}
|
|
|
|
return errors.Is(err, net.ErrClosed) || strings.Contains(err.Error(), constants.UseOfClosedNetworkConnection)
|
|
}
|
|
|
|
// IsFailedToSendCloseNotifyError returns true if the provided error is the
|
|
// "tls: failed to send closeNotify".
|
|
func IsFailedToSendCloseNotifyError(err error) bool {
|
|
if err == nil {
|
|
return false
|
|
}
|
|
return strings.Contains(err.Error(), constants.FailedToSendCloseNotify)
|
|
}
|
|
|
|
// IsOKNetworkError returns true if the provided error received from a network
|
|
// operation is one of those that usually indicate normal connection close. If
|
|
// the error is a trace.Aggregate, all the errors must be OK network errors.
|
|
func IsOKNetworkError(err error) bool {
|
|
// trace.Aggregate contains at least one error and all the errors are
|
|
// non-nil
|
|
if a, ok := trace.Unwrap(err).(trace.Aggregate); ok {
|
|
for _, err := range a.Errors() {
|
|
if !IsOKNetworkError(err) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
return trace.IsEOF(err) || IsUseOfClosedNetworkError(err) || IsFailedToSendCloseNotifyError(err)
|
|
}
|
|
|
|
// IsConnectionRefused returns true if the given err is "connection refused" error.
|
|
func IsConnectionRefused(err error) bool {
|
|
var errno syscall.Errno
|
|
if errors.As(err, &errno) {
|
|
return errno == syscall.ECONNREFUSED
|
|
}
|
|
return false
|
|
}
|