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// Copyright 2019-2025 The Wait4X Authors
//
// 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 checker
import (
"errors"
"net"
"syscall"
)
// IsConnectionRefused attempts to determine if the given error was caused by a failure to establish a connection.
func IsConnectionRefused(err error) bool {
for err != nil {
switch t := err.(type) {
case *net.OpError:
if t.Op == "dial" || t.Op == "read" {
return true
}
case syscall.Errno:
if t == syscall.ECONNREFUSED {
return true
}
}
err = errors.Unwrap(err)
}
return false
}
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