mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-01 13:39:37 +08:00
Alan Parra
a75fcc21d8
Update metalinter, fix a few lint warnings and replace deprecated linters. `deadcode`, `structcheck` and `varcheck` are abandoned and now replaced by [`unused`][1]. Since 1.19, `go fmt` reformats godocs according to https://go.dev/doc/comment. I've done a bulk-reformatting of the codebase to keep the linter happy. Backporting is mostly harmless (the exception being `lib/services/role_test.go`, that for some reason breaks the _old_ linter using the new format). [1]: https://golangci-lint.run/usage/linters/ * Bump golangci-lint version * Replace abandoned linters * Fix bodyclose on lib/auth/github.com * Fix bodyclose on lib/kube/proxy/streamproto/proto_test.go * Fix bodyclose on lib/srv/alpnproxy/proxy_test.go * Fix bodyclose on lib/web/conn_upgrade_test.go * Silence staticcheck on lib/kube/proxy/forwarder_test.go * Silence staticcheck on lib/utils/certs_test.go * Address BuildNameToCertificate deprecation warnings * Run `go fmt ./...` * Run `go fmt ./...` on api/ * Ignore formatting in role_test.go * Remove redundant initializers in lib/srv/uacc/ * Update e/
92 lines
3.0 KiB
Go
92 lines
3.0 KiB
Go
// Copyright 2022 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 x11
|
|
|
|
import (
|
|
"errors"
|
|
"io"
|
|
"math"
|
|
"net"
|
|
"os"
|
|
"syscall"
|
|
|
|
"github.com/gravitational/trace"
|
|
)
|
|
|
|
// XServerConn is a connection to an XServer through a direct or forwarded connection.
|
|
// It can either be a tcp conn, unix conn, or an X11 channel.
|
|
type XServerConn interface {
|
|
io.ReadWriteCloser
|
|
// must implement CloseWrite to prevent read loop from halting pre-maturely
|
|
CloseWrite() error
|
|
}
|
|
|
|
// XServerListener is a proxy XServer listener used to forward XServer requests.
|
|
// to an actual XServer. The underlying listener may be a unix or tcp listener.
|
|
type XServerListener interface {
|
|
// Accept waits for and returns the next connection to the listener.
|
|
Accept() (XServerConn, error)
|
|
|
|
// Close closes the listener.
|
|
// Any blocked Accept operations will be unblocked and return errors.
|
|
Close() error
|
|
|
|
// Addr returns the listener's network address.
|
|
Addr() net.Addr
|
|
}
|
|
|
|
type xserverUnixListener struct {
|
|
*net.UnixListener
|
|
}
|
|
|
|
func (l *xserverUnixListener) Accept() (XServerConn, error) {
|
|
return l.AcceptUnix()
|
|
}
|
|
|
|
type xserverTCPListener struct {
|
|
*net.TCPListener
|
|
}
|
|
|
|
func (l *xserverTCPListener) Accept() (XServerConn, error) {
|
|
return l.AcceptTCP()
|
|
}
|
|
|
|
// OpenNewXServerListener opens an XServerListener for the first available Display.
|
|
// displayOffset will determine what display number to start from when searching for
|
|
// an open display unix socket, and maxDisplays in optional limit for the number of
|
|
// display sockets which can be opened at once.
|
|
func OpenNewXServerListener(displayOffset int, maxDisplay int, screen uint32) (XServerListener, Display, error) {
|
|
if displayOffset > maxDisplay {
|
|
return nil, Display{}, trace.BadParameter("displayOffset (%d) cannot be larger than maxDisplay (%d)", displayOffset, maxDisplay)
|
|
} else if maxDisplay > MaxDisplayNumber {
|
|
return nil, Display{}, trace.BadParameter("maxDisplay (%d) cannot be larger than the max int32 (%d)", maxDisplay, math.MaxInt32)
|
|
}
|
|
|
|
// Create /tmp/.X11-unix if it doesn't exist (such as in CI)
|
|
if err := os.Mkdir(x11SockDir(), 1777); err != nil && !errors.Is(err, os.ErrExist) {
|
|
return nil, Display{}, trace.Wrap(err)
|
|
}
|
|
|
|
for displayNumber := displayOffset; displayNumber <= maxDisplay; displayNumber++ {
|
|
display := Display{DisplayNumber: displayNumber}
|
|
if l, err := display.Listen(); err == nil {
|
|
return l, display, nil
|
|
} else if !errors.Is(err, syscall.EADDRINUSE) {
|
|
return nil, Display{}, trace.Wrap(err)
|
|
}
|
|
}
|
|
|
|
return nil, Display{}, trace.LimitExceeded("No more X11 sockets are available")
|
|
}
|