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/*
* Copyright (c) 2014, Yawning Angel <yawning at torproject dot org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
// Package transports provides a interface to query supported pluggable
// transports.
package transports
import (
"fmt"
"sync"
"github.com/OperatorFoundation/obfs4/transports/base"
"github.com/OperatorFoundation/obfs4/transports/meeklite"
"github.com/OperatorFoundation/obfs4/transports/obfs2"
"github.com/OperatorFoundation/obfs4/transports/obfs3"
"github.com/OperatorFoundation/obfs4/transports/obfs4"
"github.com/OperatorFoundation/obfs4/transports/scramblesuit"
)
var transportMapLock sync.Mutex
var transportMap map[string]base.Transport = make(map[string]base.Transport)
// Register registers a transport protocol.
func Register(transport base.Transport) error {
transportMapLock.Lock()
defer transportMapLock.Unlock()
name := transport.Name()
_, registered := transportMap[name]
if registered {
return fmt.Errorf("transport '%s' already registered", name)
}
transportMap[name] = transport
return nil
}
// Transports returns the list of registered transport protocols.
func Transports() []string {
transportMapLock.Lock()
defer transportMapLock.Unlock()
var ret []string
for name := range transportMap {
ret = append(ret, name)
}
return ret
}
// Get returns a transport protocol implementation by name.
func Get(name string) base.Transport {
transportMapLock.Lock()
defer transportMapLock.Unlock()
t := transportMap[name]
return t
}
// Init initializes all of the integrated transports.
func Init() error {
Register(new(meeklite.Transport))
Register(new(obfs2.Transport))
Register(new(obfs3.Transport))
Register(new(obfs4.Transport))
Register(new(scramblesuit.Transport))
return nil
}
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