mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-04 02:03:53 +08:00
98 lines
3.2 KiB
Go
98 lines
3.2 KiB
Go
/*
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* Teleport
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* Copyright (C) 2023 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package utils
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import (
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"errors"
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"io"
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"net"
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"strings"
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"syscall"
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"github.com/gravitational/trace"
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"github.com/gravitational/teleport/api/constants"
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)
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// IsUseOfClosedNetworkError returns true if the specified error
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// indicates the use of a closed network connection.
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func IsUseOfClosedNetworkError(err error) bool {
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if err == nil {
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return false
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}
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return errors.Is(err, net.ErrClosed) || strings.Contains(err.Error(), constants.UseOfClosedNetworkConnection)
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}
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// IsFailedToSendCloseNotifyError returns true if the provided error is the
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// "tls: failed to send closeNotify".
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func IsFailedToSendCloseNotifyError(err error) bool {
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if err == nil {
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return false
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}
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return strings.Contains(err.Error(), constants.FailedToSendCloseNotify)
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}
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// IsOKNetworkError returns true if the provided error received from a network
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// operation is one of those that usually indicate normal connection close. If
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// the error is a trace.Aggregate, all the errors must be OK network errors.
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func IsOKNetworkError(err error) bool {
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// trace.Aggregate contains at least one error and all the errors are
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// non-nil
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if a, ok := trace.Unwrap(err).(trace.Aggregate); ok {
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for _, err := range a.Errors() {
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if !IsOKNetworkError(err) {
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return false
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}
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}
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return true
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}
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return errors.Is(err, io.EOF) || IsUseOfClosedNetworkError(err) || IsFailedToSendCloseNotifyError(err)
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}
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// IsConnectionRefused returns true if the given err is "connection refused" error.
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func IsConnectionRefused(err error) bool {
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var errno syscall.Errno
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if errors.As(err, &errno) {
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return errno == syscall.ECONNREFUSED
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}
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return false
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}
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// IsExpiredCredentialError checks if an error corresponds to expired credentials.
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func IsExpiredCredentialError(err error) bool {
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return IsHandshakeFailedError(err) || IsCertExpiredError(err) || trace.IsBadParameter(err) || trace.IsTrustError(err)
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}
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// IsUntrustedCertErr checks if an error is an untrusted cert error.
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func IsUntrustedCertErr(err error) bool {
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if err == nil {
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return false
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}
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errMsg := err.Error()
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return strings.Contains(errMsg, "x509: certificate is valid for") ||
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strings.Contains(errMsg, "certificate is not trusted")
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}
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const (
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// SelfSignedCertsMsg is a helper message to point users towards helpful documentation.
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SelfSignedCertsMsg = "Your proxy certificate is not trusted or expired. " +
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"Please update the certificate or follow this guide for self-signed certs: https://goteleport.com/docs/management/admin/self-signed-certs/"
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)
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