diff options
Diffstat (limited to 'transports/meeklite/base.go')
-rw-r--r-- | transports/meeklite/base.go | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/transports/meeklite/base.go b/transports/meeklite/base.go new file mode 100644 index 0000000..2a4cf80 --- /dev/null +++ b/transports/meeklite/base.go @@ -0,0 +1,89 @@ +/* + * Copyright (c) 2015, 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 meeklite provides an implementation of the Meek circumvention +// protocol. Only a client implementation is provided, and no effort is +// made to normalize the TLS fingerprint. +// +// It borrows quite liberally from the real meek-client code. +package meeklite + +import ( + "fmt" + "net" + + "git.torproject.org/pluggable-transports/goptlib.git" + "git.torproject.org/pluggable-transports/obfs4.git/transports/base" +) + +const transportName = "meek_lite" + +// Transport is the Meek implementation of the base.Transport interface. +type Transport struct{} + +// Name returns the name of the Meek transport protocol. +func (t *Transport) Name() string { + return transportName +} + +// ClientFactory returns a new meekClientFactory instance. +func (t *Transport) ClientFactory(stateDir string) (base.ClientFactory, error) { + cf := &meekClientFactory{transport: t} + return cf, nil +} + +// ServerFactory will one day return a new meekServerFactory instance. +func (t *Transport) ServerFactory(stateDir string, args *pt.Args) (base.ServerFactory, error) { + // TODO: Fill this in eventually, though for servers people should + // just use the real thing. + return nil, fmt.Errorf("server not supported") +} + +type meekClientFactory struct { + transport base.Transport +} + +func (cf *meekClientFactory) Transport() base.Transport { + return cf.transport +} + +func (cf *meekClientFactory) ParseArgs(args *pt.Args) (interface{}, error) { + return newClientArgs(args) +} + +func (cf *meekClientFactory) Dial(network, addr string, dialFn base.DialFunc, args interface{}) (net.Conn, error) { + // Validate args before opening outgoing connection. + ca, ok := args.(*meekClientArgs) + if !ok { + return nil, fmt.Errorf("invalid argument type for args") + } + + return newMeekConn(network, addr, dialFn, ca) +} + +var _ base.ClientFactory = (*meekClientFactory)(nil) +var _ base.Transport = (*Transport)(nil) |