mirror of
https://github.com/Luzifer/nginx-sso.git
synced 2024-12-25 15:21:16 +00:00
61 lines
1.8 KiB
Go
61 lines
1.8 KiB
Go
// +build !appengine
|
|
|
|
/*
|
|
*
|
|
* Copyright 2018 gRPC 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 internal contains credentials-internal code.
|
|
package internal
|
|
|
|
import (
|
|
"net"
|
|
"syscall"
|
|
)
|
|
|
|
type sysConn = syscall.Conn
|
|
|
|
// syscallConn keeps reference of rawConn to support syscall.Conn for channelz.
|
|
// SyscallConn() (the method in interface syscall.Conn) is explicitly
|
|
// implemented on this type,
|
|
//
|
|
// Interface syscall.Conn is implemented by most net.Conn implementations (e.g.
|
|
// TCPConn, UnixConn), but is not part of net.Conn interface. So wrapper conns
|
|
// that embed net.Conn don't implement syscall.Conn. (Side note: tls.Conn
|
|
// doesn't embed net.Conn, so even if syscall.Conn is part of net.Conn, it won't
|
|
// help here).
|
|
type syscallConn struct {
|
|
net.Conn
|
|
// sysConn is a type alias of syscall.Conn. It's necessary because the name
|
|
// `Conn` collides with `net.Conn`.
|
|
sysConn
|
|
}
|
|
|
|
// WrapSyscallConn tries to wrap rawConn and newConn into a net.Conn that
|
|
// implements syscall.Conn. rawConn will be used to support syscall, and newConn
|
|
// will be used for read/write.
|
|
//
|
|
// This function returns newConn if rawConn doesn't implement syscall.Conn.
|
|
func WrapSyscallConn(rawConn, newConn net.Conn) net.Conn {
|
|
sysConn, ok := rawConn.(syscall.Conn)
|
|
if !ok {
|
|
return newConn
|
|
}
|
|
return &syscallConn{
|
|
Conn: newConn,
|
|
sysConn: sysConn,
|
|
}
|
|
}
|