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[flashproxy/master] Rewrite ProxyPair to be more generic.
by dcf＠torproject.org 12 Jun '11

12 Jun '11

commit 9cef884c60fa5c4cea7eb1fa092c9fb53a8a1550 Author: David Fifield <david(a)bamsoftware.com> Date: Sat Jun 11 21:41:41 2011 -0700 Rewrite ProxyPair to be more generic. --- ProxyPair.as | 204 +++++++++++++++++++++++++++------------------------------- 1 files changed, 95 insertions(+), 109 deletions(-) diff --git a/ProxyPair.as b/ProxyPair.as index fa51933..ca9f092 100644 --- a/ProxyPair.as +++ b/ProxyPair.as @@ -1,6 +1,5 @@ package { - import flash.errors.IllegalOperationError; import flash.events.Event; import flash.events.EventDispatcher; import flash.events.IOErrorEvent; @@ -11,119 +10,122 @@ package import flash.utils.ByteArray; import flash.utils.clearTimeout; import flash.utils.setTimeout; - - import swfcat; - + + /* An instance of a client-relay connection. */ public class ProxyPair extends EventDispatcher { + // Socket to client. + private var s_c:*; + private var connect_c:Function; + + // Socket to relay. + private var s_r:*; + private var connect_r:Function; + + // Parent swfcat, for UI updates and rate meter. private var ui:swfcat; - - protected var client_addr:Object; - - /* Not defined here: subclasses should define their own - * protected var client_socket:Object; - */ - - private var c2r_schedule:Array; - - private var relay_addr:Object; - private var relay_socket:Socket; + + // Pending byte read counts for relay and client sockets. private var r2c_schedule:Array; - + private var c2r_schedule:Array; // Callback id. private var flush_id:uint; - - public function ProxyPair(self:ProxyPair, ui:swfcat) - { - if (self != this) { - //only a subclass can pass a valid reference to self - throw new IllegalOperationError("ProxyPair cannot be instantiated directly."); - } - - this.ui = ui; - this.c2r_schedule = new Array(); - this.r2c_schedule = new Array(); - - setup_relay_socket(); - - /* client_socket setup should be taken */ - /* care of in the subclass constructor */ - } - - public function close():void - { - if (relay_socket != null && relay_socket.connected) { - relay_socket.close(); - } - - /* subclasses should override to close */ - /* their client_socket according to impl. */ - } - - public function get connected():Boolean - { - return (relay_socket != null && relay_socket.connected); - - /* subclasses should override to check */ - /* connectivity of their client_socket. */ - } - - public function set client(client_addr:Object):void + + public function log(msg:String):void { - /* subclasses should override to */ - /* connect the client_socket here */ + ui.puts(id() + ": " + msg) } - - public function set relay(relay_addr:Object):void + + // String describing this pair for output. + public function id():String { - this.relay_addr = relay_addr; - log("Relay: connecting to " + relay_addr.host + ":" + relay_addr.port + "."); - relay_socket.connect(relay_addr.host, relay_addr.port); + return "<>"; } - - protected function transfer_bytes(src:Object, dst:Object, num_bytes:uint):void + + public function ProxyPair(ui:swfcat, s_c:*, connect_c:Function, s_r:*, connect_r:Function) { - /* No-op: must be overridden by subclasses */ + this.ui = ui; + /* s_c is a socket for connecting to the client. connect_c is a + function that, when called, connects s_c. Likewise for s_r and + connect_r. */ + this.s_c = s_c; + this.connect_c = connect_c; + this.s_r = s_r; + this.connect_r = connect_r; + + this.c2r_schedule = []; + this.r2c_schedule = []; } - protected function socket_error(message:String):Function + /* Return a function that shows an error message and closes the other half + of a communication pair. */ + private function socket_error(message:String, other:*):Function { return function(e:Event):void { if (e is TextEvent) log(message + ": " + (e as TextEvent).text + "."); else log(message + "."); - close(); + if (other && other.connected) + other.close(); + dispatchEvent(new Event(Event.COMPLETE)); }; } - - private function setup_relay_socket():void + + public function connect():void + { + s_r.addEventListener(Event.CONNECT, relay_connected); + s_r.addEventListener(Event.CLOSE, socket_error("Relay: closed", s_c)); + s_r.addEventListener(IOErrorEvent.IO_ERROR, socket_error("Relay: I/O error", s_c)); + s_r.addEventListener(SecurityErrorEvent.SECURITY_ERROR, socket_error("Relay: security error", s_c)); + s_r.addEventListener(ProgressEvent.SOCKET_DATA, relay_to_client); + + s_c.addEventListener(Event.CONNECT, client_connected); + s_c.addEventListener(Event.CLOSE, socket_error("Client: closed", s_r)); + s_c.addEventListener(IOErrorEvent.IO_ERROR, socket_error("Client: I/O error", s_r)); + s_c.addEventListener(SecurityErrorEvent.SECURITY_ERROR, socket_error("Client: security error", s_r)); + s_c.addEventListener(ProgressEvent.SOCKET_DATA, client_to_relay); + + log("Relay: connecting."); + connect_r(); + log("Client: connecting."); + connect_c(); + } + + private function relay_connected(e:Event):void { - relay_socket = new Socket(); - relay_socket.addEventListener(Event.CONNECT, function (e:Event):void { - log("Relay: connected to " + relay_addr.host + ":" + relay_addr.port + "."); - if (connected) { - dispatchEvent(new Event(Event.CONNECT)); - } - }); - relay_socket.addEventListener(Event.CLOSE, socket_error("Relay: closed")); - relay_socket.addEventListener(IOErrorEvent.IO_ERROR, socket_error("Relay: I/O error")) - relay_socket.addEventListener(SecurityErrorEvent.SECURITY_ERROR, socket_error("Relay: security error")) - relay_socket.addEventListener(ProgressEvent.SOCKET_DATA, relay_to_client); + log("Relay: connected."); } - - protected function client_to_relay(e:ProgressEvent):void + + private function client_connected(e:Event):void { - c2r_schedule.push(e.bytesLoaded); - flush(); + log("Client: connected."); } - + private function relay_to_client(e:ProgressEvent):void { r2c_schedule.push(e.bytesLoaded); flush(); } - + + private function client_to_relay(e:ProgressEvent):void + { + c2r_schedule.push(e.bytesLoaded); + flush(); + } + + private function transfer_chunk(s_from:*, s_to:*, n:uint, + label:String):void + { + var bytes:ByteArray; + + bytes = new ByteArray(); + s_from.readBytes(bytes, 0, n); + s_to.writeBytes(bytes); + ui.rate_limit.update(n); + log(label + ": read " + bytes.length + "."); + } + /* Send as much data as the rate limit currently allows. */ private function flush():void { @@ -131,37 +133,21 @@ package clearTimeout(flush_id); flush_id = undefined; - if (!connected) - /* Can't do anything until connected. */ + if (!(s_r.connected && s_c.connected)) + /* Can't do anything until both sockets are connected. */ return; - while (!ui.rate_limit.is_limited() && (c2r_schedule.length > 0 || r2c_schedule.length > 0)) { - var num_bytes:uint; - - if (c2r_schedule.length > 0) { - num_bytes = c2r_schedule.shift(); - transfer_bytes(null, relay_socket, num_bytes); - ui.rate_limit.update(num_bytes); - } - - if (r2c_schedule.length > 0) { - num_bytes = r2c_schedule.shift(); - transfer_bytes(relay_socket, null, num_bytes); - ui.rate_limit.update(num_bytes); - } + while (!ui.rate_limit.is_limited() && + (r2c_schedule.length > 0 || c2r_schedule.length > 0)) { + if (r2c_schedule.length > 0) + transfer_chunk(s_r, s_c, r2c_schedule.shift(), "Relay"); + if (c2r_schedule.length > 0) + transfer_chunk(s_c, s_r, c2r_schedule.shift(), "Client"); } /* Call again when safe, if necessary. */ - if (c2r_schedule.length > 0 || r2c_schedule.length > 0) + if (r2c_schedule.length > 0 || c2r_schedule.length > 0) flush_id = setTimeout(flush, ui.rate_limit.when() * 1000); } - - /* Helper function to write output to the - * swfcat console. Set as protected for - * subclasses */ - protected function log(s:String):void - { - ui.puts(s); - } } }

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[flashproxy/master] Remove spurious differences from master branch.
by dcf＠torproject.org 12 Jun '11

12 Jun '11

commit 04b11aa394ec3484844ed146d832ffa8d90fb16a Author: David Fifield <david(a)bamsoftware.com> Date: Sat Jun 11 14:52:18 2011 -0700 Remove spurious differences from master branch. --- swfcat.as | 98 +++++++++++++++++++++++++++++++++--------------------------- 1 files changed, 54 insertions(+), 44 deletions(-) diff --git a/swfcat.as b/swfcat.as index 8e54f72..ac52ec8 100644 --- a/swfcat.as +++ b/swfcat.as @@ -37,6 +37,8 @@ package port: 9002 }; + private const MAX_NUM_PROXY_PAIRS:uint = 1; + // Milliseconds. private const FACILITATOR_POLL_INTERVAL:int = 10000; @@ -54,84 +56,90 @@ package private var client_id:String; private var proxy_pair_factory:Function; + private var relay_addr:Object; - private var debug_mode:Boolean; private var proxy_mode:Boolean; /* TextField for debug output. */ private var output_text:TextField; - - /* Badge for display */ + + /* UI shown when debug is off. */ private var badge:Badge; + /* Number of proxy pairs currently connected (up to + MAX_NUM_PROXY_PAIRS). */ + private var num_proxy_pairs:int = 0; + private var fac_addr:Object; - private var relay_addr:Object; public var rate_limit:RateLimit; + public function puts(s:String):void + { + output_text.appendText(s + "\n"); + output_text.scrollV = output_text.maxScrollV; + } + public function swfcat() { - proxy_mode = false; - debug_mode = false; - // Absolute positioning. stage.scaleMode = StageScaleMode.NO_SCALE; stage.align = StageAlign.TOP_LEFT; + output_text = new TextField(); + output_text.width = stage.stageWidth; + output_text.height = stage.stageHeight; + output_text.background = true; + output_text.backgroundColor = 0x001f0f; + output_text.textColor = 0x44cc44; + + badge = new Badge(); + if (RATE_LIMIT) rate_limit = new BucketRateLimit(RATE_LIMIT * RATE_LIMIT_HISTORY, RATE_LIMIT_HISTORY); else rate_limit = new RateUnlimit(); - + + puts("Starting."); // Wait until the query string parameters are loaded. this.loaderInfo.addEventListener(Event.COMPLETE, loaderinfo_complete); } - - public function puts(s:String):void - { - if (output_text != null) { - output_text.appendText(s + "\n"); - output_text.scrollV = output_text.maxScrollV; - } - } private function loaderinfo_complete(e:Event):void { var fac_spec:String; - var relay_spec:String; - debug_mode = (this.loaderInfo.parameters["debug"] != null) - proxy_mode = (this.loaderInfo.parameters["proxy"] != null); - if (proxy_mode && !debug_mode) { - badge = new Badge(); - addChild(badge); - } else { - output_text = new TextField(); - output_text.width = stage.stageWidth; - output_text.height = stage.stageHeight; - output_text.background = true; - output_text.backgroundColor = 0x001f0f; - output_text.textColor = 0x44cc44; + puts("Parameters loaded."); + + if (this.loaderInfo.parameters["debug"]) addChild(output_text); - } - - puts("Starting: parameters loaded."); - - fac_spec = this.loaderInfo.parameters["facilitator"]; - if (fac_spec) { - puts("Facilitator spec: \"" + fac_spec + "\""); - fac_addr = parse_addr_spec(fac_spec); - if (!fac_addr) { - puts("Error: Facilitator spec must be in the form \"host:port\"."); - return; - } - } else { - fac_addr = DEFAULT_FACILITATOR_ADDR; + else + addChild(badge); + + proxy_mode = (this.loaderInfo.parameters["proxy"] != null); + + fac_addr = get_param_addr("facilitator", DEFAULT_FACILITATOR_ADDR); + if (!fac_addr) { + puts("Error: Facilitator spec must be in the form \"host:port\"."); + return; } main(); } + /* Get an address structure from the given movie parameter, or the given + default. Returns null on error. */ + private function get_param_addr(param:String, default_addr:Object):Object + { + var spec:String, addr:Object; + + spec = this.loaderInfo.parameters[param]; + if (spec) + return parse_addr_spec(spec); + else + return default_addr; + } + /* The main logic begins here, after start-up issues are taken care of. */ private function main():void { @@ -175,7 +183,8 @@ package proxy_pair_factory = rtmfp_proxy_pair_factory; start_proxy_pair(); s_c.send_hello(e.peer); - } else if (!debug_mode && badge != null) { + } else { + num_proxy_pairs++; badge.proxy_begin(); } @@ -238,7 +247,8 @@ package p_p.addEventListener(Event.CLOSE, function (e:Event):void { puts("ProxyPair: connection closed."); p_p = null; - if (proxy_mode && !debug_mode && badge != null) { + if (proxy_mode) { + num_proxy_pairs--; badge.proxy_end(); } establish_facilitator_connection();

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[flashproxy/master] Do RTMFP client and proxy using the new RTMFPSocket and ProxyPair.
by dcf＠torproject.org 12 Jun '11

12 Jun '11

commit b631fc0bc82957e07ad2a18ca1747eced2d6ca6e Author: David Fifield <david(a)bamsoftware.com> Date: Sun Jun 12 00:25:39 2011 -0700 Do RTMFP client and proxy using the new RTMFPSocket and ProxyPair. --- swfcat.as | 294 ++++++++++++++++++++++++++++++++++--------------------------- 1 files changed, 163 insertions(+), 131 deletions(-) diff --git a/swfcat.as b/swfcat.as index ac52ec8..6125187 100644 --- a/swfcat.as +++ b/swfcat.as @@ -5,26 +5,24 @@ package import flash.display.StageScaleMode; import flash.text.TextField; import flash.text.TextFormat; + import flash.net.Socket; + import flash.net.URLLoader; + import flash.net.URLLoaderDataFormat; + import flash.net.URLRequest; + import flash.net.URLRequestMethod; + import flash.net.URLVariables; import flash.events.Event; + import flash.events.IOErrorEvent; + import flash.events.SecurityErrorEvent; import flash.utils.setTimeout; - import FacilitatorSocket; - import events.FacilitatorSocketEvent; - - import ProxyPair; - import RTMFPProxyPair; - import TCPProxyPair; - - import rtmfp.CirrusSocket; - import rtmfp.events.CirrusSocketEvent; - public class swfcat extends Sprite { /* Adobe's Cirrus server for RTMFP connections. The Cirrus key is defined at compile time by reading from the CIRRUS_KEY environment var. */ - private const DEFAULT_CIRRUS_ADDR:String = "rtmfp://p2p.rtmfp.net"; - private const DEFAULT_CIRRUS_KEY:String = RTMFP::CIRRUS_KEY; + private const CIRRUS_URL:String = "rtmfp://p2p.rtmfp.net"; + private const CIRRUS_KEY:String = RTMFP::CIRRUS_KEY; private const DEFAULT_FACILITATOR_ADDR:Object = { host: "tor-facilitator.bamsoftware.com", @@ -47,17 +45,6 @@ package // Seconds. private const RATE_LIMIT_HISTORY:Number = 5.0; - // Socket to Cirrus server - private var s_c:CirrusSocket; - // Socket to facilitator. - private var s_f:FacilitatorSocket; - // Handle local-remote traffic - private var p_p:ProxyPair; - - private var client_id:String; - private var proxy_pair_factory:Function; - private var relay_addr:Object; - private var proxy_mode:Boolean; /* TextField for debug output. */ @@ -124,7 +111,10 @@ package return; } - main(); + if (proxy_mode) + proxy_main(); + else + client_main(); } /* Get an address structure from the given movie parameter, or the given @@ -141,129 +131,171 @@ package } /* The main logic begins here, after start-up issues are taken care of. */ - private function main():void + private function proxy_main():void { - if (proxy_mode) { - establish_facilitator_connection(); - } else { - establish_cirrus_connection(); + var fac_url:String; + var loader:URLLoader; + + if (num_proxy_pairs >= MAX_NUM_PROXY_PAIRS) { + setTimeout(proxy_main, FACILITATOR_POLL_INTERVAL); + return; } - } - private function establish_cirrus_connection():void - { - s_c = new CirrusSocket(); - s_c.addEventListener(CirrusSocketEvent.CONNECT_SUCCESS, function (e:CirrusSocketEvent):void { - puts("Cirrus: connected with id " + s_c.id + "."); - if (proxy_mode) { - start_proxy_pair(); - s_c.send_hello(client_id); - } else { - establish_facilitator_connection(); - } - }); - s_c.addEventListener(CirrusSocketEvent.CONNECT_FAILED, function (e:CirrusSocketEvent):void { - puts("Error: failed to connect to Cirrus."); - }); - s_c.addEventListener(CirrusSocketEvent.CONNECT_CLOSED, function (e:CirrusSocketEvent):void { - puts("Cirrus: closed connection."); + loader = new URLLoader(); + /* Get the x-www-form-urlencoded values. */ + loader.dataFormat = URLLoaderDataFormat.VARIABLES; + loader.addEventListener(Event.COMPLETE, fac_complete); + loader.addEventListener(IOErrorEvent.IO_ERROR, function (e:IOErrorEvent):void { + puts("Facilitator: I/O error: " + e.text + "."); }); - s_c.addEventListener(CirrusSocketEvent.HELLO_RECEIVED, function (e:CirrusSocketEvent):void { - puts("Cirrus: received hello from peer " + e.peer); - - /* don't bother if we already have a proxy going */ - if (p_p != null && p_p.connected) { - return; - } - - /* if we're in proxy mode, we should have already set - up a proxy pair */ - if (!proxy_mode) { - relay_addr = DEFAULT_TOR_CLIENT_ADDR; - proxy_pair_factory = rtmfp_proxy_pair_factory; - start_proxy_pair(); - s_c.send_hello(e.peer); - } else { - num_proxy_pairs++; - badge.proxy_begin(); - } - - p_p.client = {peer: e.peer, stream: e.stream}; + loader.addEventListener(SecurityErrorEvent.SECURITY_ERROR, function (e:SecurityErrorEvent):void { + puts("Facilitator: security error: " + e.text + "."); }); - - s_c.connect(DEFAULT_CIRRUS_ADDR, DEFAULT_CIRRUS_KEY); + + fac_url = "http://" + encodeURIComponent(fac_addr.host) + + ":" + encodeURIComponent(fac_addr.port) + "/"; + puts("Facilitator: connecting to " + fac_url + "."); + loader.load(new URLRequest(fac_url)); } - private function establish_facilitator_connection():void + private function fac_complete(e:Event):void { - s_f = new FacilitatorSocket(fac_addr.host, fac_addr.port); - s_f.addEventListener(FacilitatorSocketEvent.CONNECT_FAILED, function (e:Event):void { - puts("Facilitator: connect failed."); - setTimeout(establish_facilitator_connection, FACILITATOR_POLL_INTERVAL); - }); - - if (proxy_mode) { - s_f.addEventListener(FacilitatorSocketEvent.REGISTRATION_RECEIVED, function (e:FacilitatorSocketEvent):void { - var client_addr:Object = parse_addr_spec(e.client); - relay_addr = parse_addr_spec(e.relay); - if (client_addr == null) { - puts("Facilitator: got registration " + e.client); - proxy_pair_factory = rtmfp_proxy_pair_factory; - if (s_c == null || !s_c.connected) { - client_id = e.client; - establish_cirrus_connection(); - } else { - start_proxy_pair(); - s_c.send_hello(e.client); - } - } else { - proxy_pair_factory = tcp_proxy_pair_factory; - start_proxy_pair(); - p_p.client = client_addr; - } - }); - s_f.addEventListener(FacilitatorSocketEvent.REGISTRATIONS_EMPTY, function (e:Event):void { - puts("Facilitator: no registrations available."); - setTimeout(establish_facilitator_connection, FACILITATOR_POLL_INTERVAL); - }); - puts("Facilitator: getting registration."); - s_f.get_registration(); - } else { - s_f.addEventListener(FacilitatorSocketEvent.REGISTRATION_FAILED, function (e:Event):void { - puts("Facilitator: registration failed."); - setTimeout(establish_facilitator_connection, FACILITATOR_POLL_INTERVAL); - }); - puts("Facilitator: posting registration."); - s_f.post_registration(s_c.id); + var loader:URLLoader; + var client_spec:String; + var relay_spec:String; + var proxy_pair:Object; + + setTimeout(proxy_main, FACILITATOR_POLL_INTERVAL); + + loader = e.target as URLLoader; + client_spec = loader.data.client; + if (client_spec == "") { + puts("No clients."); + return; + } else if (!client_spec) { + puts("Error: missing \"client\" in response."); + return; } + relay_spec = loader.data.relay; + if (!relay_spec) { + puts("Error: missing \"relay\" in response."); + return; + } + puts("Facilitator: got client:\"" + client_spec + "\" " + + "relay:\"" + relay_spec + "\"."); + + try { + proxy_pair = make_proxy_pair(client_spec, relay_spec); + } catch (e:ArgumentError) { + puts("Error: " + e); + return; + } + proxy_pair.addEventListener(Event.COMPLETE, function(e:Event):void { + proxy_pair.log("Complete."); + num_proxy_pairs--; + badge.proxy_end(); + }); + proxy_pair.connect(); + + num_proxy_pairs++; + badge.proxy_begin(); } - - private function start_proxy_pair():void + + private function client_main():void { - p_p = proxy_pair_factory(); - p_p.addEventListener(Event.CONNECT, function (e:Event):void { - puts("ProxyPair: connected!"); + var rs:RTMFPSocket; + + rs = new RTMFPSocket(CIRRUS_URL, CIRRUS_KEY); + rs.addEventListener(Event.COMPLETE, function (e:Event):void { + puts("Got RTMFP id " + rs.id); + register(rs); }); - p_p.addEventListener(Event.CLOSE, function (e:Event):void { - puts("ProxyPair: connection closed."); - p_p = null; - if (proxy_mode) { - num_proxy_pairs--; - badge.proxy_end(); - } - establish_facilitator_connection(); + rs.addEventListener(RTMFPSocket.ACCEPT_EVENT, client_accept); + + rs.listen(); + } + + private function client_accept(e:Event):void { + var rs:RTMFPSocket; + var s_t:Socket; + var proxy_pair:ProxyPair; + + rs = e.target as RTMFPSocket; + s_t = new Socket(); + + puts("Got RTMFP connection from " + rs.peer_id); + + proxy_pair = new ProxyPair(this, rs, function ():void { + /* Do nothing; already connected. */ + }, s_t, function ():void { + s_t.connect(DEFAULT_TOR_CLIENT_ADDR.host, DEFAULT_TOR_CLIENT_ADDR.port); }); - p_p.relay = relay_addr; + proxy_pair.connect(); } - - private function rtmfp_proxy_pair_factory():ProxyPair - { - return new RTMFPProxyPair(this, s_c, s_c.local_stream_name); + + private function register(rs:RTMFPSocket):void { + var fac_url:String; + var loader:URLLoader; + var request:URLRequest; + var variables:URLVariables; + + loader = new URLLoader(); + loader.addEventListener(Event.COMPLETE, function (e:Event):void { + puts("Facilitator: registered."); + }); + loader.addEventListener(SecurityErrorEvent.SECURITY_ERROR, function (e:SecurityErrorEvent):void { + puts("Facilitator: security error: " + e.text + "."); + rs.close(); + }); + loader.addEventListener(IOErrorEvent.IO_ERROR, function (e:IOErrorEvent):void { + puts("Facilitator: I/O error: " + e.text + "."); + rs.close(); + }); + + fac_url = "http://" + encodeURIComponent(fac_addr.host) + + ":" + encodeURIComponent(fac_addr.port) + "/"; + request = new URLRequest(fac_url); + request.method = URLRequestMethod.POST; + request.data = new URLVariables; + request.data["client"] = rs.id; + + puts("Facilitator: connecting to " + fac_url + "."); + loader.load(request); } - - private function tcp_proxy_pair_factory():ProxyPair + + private function make_proxy_pair(client_spec:String, relay_spec:String):ProxyPair { - return new TCPProxyPair(this); + var addr_c:Object; + var addr_r:Object; + var s_c:*; + var s_r:Socket; + + addr_r = swfcat.parse_addr_spec(relay_spec); + if (!addr_r) + throw new ArgumentError("Relay spec must be in the form \"host:port\"."); + + addr_c = swfcat.parse_addr_spec(client_spec); + if (addr_c) { + s_c = new Socket(); + s_r = new Socket(); + return new ProxyPair(this, s_c, function ():void { + s_c.connect(addr_c.host, addr_c.port); + }, s_r, function ():void { + s_r.connect(addr_r.host, addr_r.port); + }); + } + + if (client_spec.match(/^[0-9A-Fa-f]{64}$/)) { + s_c = new RTMFPSocket(CIRRUS_URL, CIRRUS_KEY); + s_r = new Socket(); + return new ProxyPair(this, s_c, function ():void { + s_c.connect(client_spec); + }, s_r, function ():void { + s_r.connect(addr_r.host, addr_r.port); + }); + } + + throw new ArgumentError("Can't parse client spec \"" + client_spec + "\"."); } /* Parse an address in the form "host:port". Returns an Object with

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[flashproxy/master] Add an RTMFPSocket class.
by dcf＠torproject.org 12 Jun '11

12 Jun '11

commit 9a85e5b90a37c8c989cda04f69862b82f25ca924 Author: David Fifield <david(a)bamsoftware.com> Date: Sat Jun 11 21:26:55 2011 -0700 Add an RTMFPSocket class. --- RTMFPSocket.as | 209 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 209 insertions(+), 0 deletions(-) diff --git a/RTMFPSocket.as b/RTMFPSocket.as new file mode 100644 index 0000000..e23c4fd --- /dev/null +++ b/RTMFPSocket.as @@ -0,0 +1,209 @@ +/* +The RTMFPSocket class provides a socket-like interface around RTMFP +NetConnection and NetStream. Each RTMFPSocket contains one NetConnection and two +NetStreams, one for reading and one for writing. + +To create a listening socket: + var rs:RTMFPSocket = new RTMFPSocket(url, key); + rs.addEventListener(Event.COMPLETE, function (e:Event):void { + // rs.id is set and can be sent out of band to the client. + }); + rs.addEventListener(RTMFPSocket.ACCEPT_EVENT, function (e:Event):void { + // rs.peer_id is the ID of the connected client. + }); + rs.listen(); +To connect to a listening socket: + // Receive peer_id out of band. + var rs:RTMFPSocket = new RTMFPSocket(url, key); + rs.addEventListener(Event.CONNECT, function (e:Event):void { + // rs.id and rs.peer_id are now set. + }); +*/ + +package +{ + import flash.events.Event; + import flash.events.EventDispatcher; + import flash.events.IOErrorEvent; + import flash.events.NetStatusEvent; + import flash.events.ProgressEvent; + import flash.net.NetConnection; + import flash.net.NetStream; + import flash.utils.ByteArray; + + public class RTMFPSocket extends EventDispatcher + { + public static const ACCEPT_EVENT:String = "accept"; + + public var connected:Boolean; + + private var nc:NetConnection; + private var incoming:NetStream; + private var outgoing:NetStream; + + /* Cache to hold the peer ID between when connect is called and the + NetConnection exists. */ + private var connect_peer_id:String; + + private var buffer:ByteArray; + + private var cirrus_url:String; + private var cirrus_key:String; + + public function RTMFPSocket(cirrus_url:String, cirrus_key:String) + { + connected = false; + + buffer = new ByteArray(); + + this.cirrus_url = cirrus_url; + this.cirrus_key = cirrus_key; + + nc = new NetConnection(); + } + + public function get id():String + { + return nc.nearID; + } + + public function get peer_id():String + { + return incoming.farID; + } + + /* NetStatusEvents that aren't handled more specifically in + listen_netstatus_event or connect_netstatus_event. */ + private function generic_netstatus_event(e:NetStatusEvent):void + { + switch (e.info.code) { + case "NetConnection.Connect.Closed": + dispatchEvent(new Event(Event.CLOSE)); + break; + case "NetStream.Connect.Closed": + connected = false; + close(); + break; + default: + var event:IOErrorEvent = new IOErrorEvent(IOErrorEvent.IO_ERROR); + event.text = e.info.code; + dispatchEvent(event); + break; + } + } + + private function listen_netstatus_event(e:NetStatusEvent):void + { + switch (e.info.code) { + case "NetConnection.Connect.Success": + outgoing = new NetStream(nc, NetStream.DIRECT_CONNECTIONS); + outgoing.client = { + onPeerConnect: listen_onpeerconnect + }; + outgoing.publish("server"); + + /* listen is complete, ready to accept. */ + dispatchEvent(new Event(Event.COMPLETE)); + break; + case "NetStream.Connect.Success": + break; + default: + return generic_netstatus_event(e); + break; + } + } + + private function listen_onpeerconnect(peer:NetStream):Boolean { + incoming = new NetStream(nc, peer.farID); + incoming.client = { + r: receive_data + }; + incoming.play("client"); + + connected = true; + dispatchEvent(new Event(ACCEPT_EVENT)); + + return true; + } + + private function connect_netstatus_event(e:NetStatusEvent):void + { + switch (e.info.code) { + case "NetConnection.Connect.Success": + outgoing = new NetStream(nc, NetStream.DIRECT_CONNECTIONS); + outgoing.publish("client"); + + incoming = new NetStream(nc, connect_peer_id); + incoming.client = { + r: receive_data + }; + incoming.play("server"); + break; + case "NetStream.Connect.Success": + connected = true; + dispatchEvent(new Event(Event.CONNECT)); + break; + default: + return generic_netstatus_event(e); + break; + } + } + + /* Function called back when the other side does a send. */ + private function receive_data(bytes:ByteArray):void { + var event:ProgressEvent; + + event = new ProgressEvent(ProgressEvent.SOCKET_DATA); + event.bytesLoaded = bytes.bytesAvailable; + + bytes.readBytes(buffer, buffer.length, bytes.bytesAvailable); + if (bytes.bytesAvailable == 0) { + /* Reclaim memory space. */ + bytes.position = 0; + bytes.length = 0; + } + + dispatchEvent(event); + } + + public function listen():void + { + nc.addEventListener(NetStatusEvent.NET_STATUS, listen_netstatus_event); + nc.connect(cirrus_url, cirrus_key); + } + + public function connect(peer_id:String):void + { + /* Store for later reading by connect_netstatus_event. */ + this.connect_peer_id = peer_id; + + nc.addEventListener(NetStatusEvent.NET_STATUS, connect_netstatus_event); + nc.connect(cirrus_url, cirrus_key); + } + + public function close():void + { + outgoing.close(); + incoming.close(); + nc.close(); + } + + public function readBytes(output:ByteArray, offset:uint = 0, length:uint = 0):void + { + buffer.readBytes(output, offset, length); + } + + public function writeBytes(input:ByteArray, offset:uint = 0, length:uint = 0):void + { + var sendbuf:ByteArray; + + /* Read into a new buffer, in case offset and length do not + completely span input. */ + sendbuf = new ByteArray(); + sendbuf.writeBytes(input, offset, length); + + /* Use a short method name because it's sent over the wire. */ + outgoing.send("r", sendbuf); + } + } +}

1 0

[flashproxy/master] Restore labels on ProxyPair output.
by dcf＠torproject.org 12 Jun '11

12 Jun '11

commit ca61c5d4125c4991468a36ef8cf6e9fb23d820f2 Author: David Fifield <david(a)bamsoftware.com> Date: Sun Jun 12 01:00:56 2011 -0700 Restore labels on ProxyPair output. Allow setting the label from the outside. --- ProxyPair.as | 13 +++++++++---- swfcat.as | 11 +++++++++-- 2 files changed, 18 insertions(+), 6 deletions(-) diff --git a/ProxyPair.as b/ProxyPair.as index ca9f092..62c6ec2 100644 --- a/ProxyPair.as +++ b/ProxyPair.as @@ -14,6 +14,9 @@ package /* An instance of a client-relay connection. */ public class ProxyPair extends EventDispatcher { + // Label for log messages. + public var name:String; + // Socket to client. private var s_c:*; private var connect_c:Function; @@ -33,13 +36,15 @@ package public function log(msg:String):void { - ui.puts(id() + ": " + msg) + if (name) + ui.puts(name + ": " + msg) + else + ui.puts(msg) } - // String describing this pair for output. - public function id():String + public function set_name(name:String):void { - return "<>"; + this.name = name; } public function ProxyPair(ui:swfcat, s_c:*, connect_c:Function, s_r:*, connect_r:Function) diff --git a/swfcat.as b/swfcat.as index 6125187..d9e9bc6 100644 --- a/swfcat.as +++ b/swfcat.as @@ -265,6 +265,7 @@ package private function make_proxy_pair(client_spec:String, relay_spec:String):ProxyPair { + var proxy_pair:ProxyPair; var addr_c:Object; var addr_r:Object; var s_c:*; @@ -278,21 +279,27 @@ package if (addr_c) { s_c = new Socket(); s_r = new Socket(); - return new ProxyPair(this, s_c, function ():void { + proxy_pair = new ProxyPair(this, s_c, function ():void { s_c.connect(addr_c.host, addr_c.port); }, s_r, function ():void { s_r.connect(addr_r.host, addr_r.port); }); + proxy_pair.set_name("<" + addr_c.host + ":" + addr_c.port + "," + + addr_r.host + ":" + addr_r.port + ">"); + return proxy_pair; } if (client_spec.match(/^[0-9A-Fa-f]{64}$/)) { s_c = new RTMFPSocket(CIRRUS_URL, CIRRUS_KEY); s_r = new Socket(); - return new ProxyPair(this, s_c, function ():void { + proxy_pair = new ProxyPair(this, s_c, function ():void { s_c.connect(client_spec); }, s_r, function ():void { s_r.connect(addr_r.host, addr_r.port); }); + proxy_pair.set_name("<" + client_spec.substr(0, 4) + "...," + + addr_r.host + ":" + addr_r.port + ">"); + return proxy_pair; } throw new ArgumentError("Can't parse client spec \"" + client_spec + "\".");

1 0

[flashproxy/master] Remove unused code.
by dcf＠torproject.org 12 Jun '11

12 Jun '11

commit 53aecf9837f1dd95d005aaea8a116907488927ea Author: David Fifield <david(a)bamsoftware.com> Date: Sat Jun 11 22:19:30 2011 -0700 Remove unused code. --- FacilitatorSocket.as | 100 ------------------ RTMFPProxyPair.as | 101 ------------------ TCPProxyPair.as | 77 -------------- events/FacilitatorSocketEvent.as | 24 ----- rtmfp/CirrusSocket.as | 142 -------------------------- rtmfp/RTMFPSocket.as | 202 ------------------------------------- rtmfp/RTMFPSocketClient.as | 46 --------- rtmfp/events/CirrusSocketEvent.as | 22 ---- rtmfp/events/RTMFPSocketEvent.as | 25 ----- 9 files changed, 0 insertions(+), 739 deletions(-) diff --git a/FacilitatorSocket.as b/FacilitatorSocket.as deleted file mode 100644 index 70325c1..0000000 --- a/FacilitatorSocket.as +++ /dev/null @@ -1,100 +0,0 @@ -package -{ - import flash.events.Event; - import flash.events.EventDispatcher; - import flash.events.HTTPStatusEvent; - import flash.events.IOErrorEvent; - import flash.events.SecurityErrorEvent; - import flash.net.URLLoader; - import flash.net.URLLoaderDataFormat; - import flash.net.URLRequest; - import flash.net.URLRequestMethod; - import flash.net.URLVariables; - - import events.FacilitatorSocketEvent; - - [Event(name=FacilitatorSocketEvent.CONNECT_FAILED, type="com.flashproxy.rtmfp.events.FacilitatorSocketEvent")] - [Event(name=FacilitatorSocketEvent.REGISTRATION_FAILED, type="com.flashproxy.rtmfp.events.FacilitatorSocketEvent")] - [Event(name=FacilitatorSocketEvent.REGISTRATION_RECEIVED, type="com.flashproxy.rtmfp.events.FacilitatorSocketEvent")] - [Event(name=FacilitatorSocketEvent.REGISTRATIONS_EMPTY, type="com.flashproxy.rtmfp.events.FacilitatorSocketEvent")] - public class FacilitatorSocket extends EventDispatcher - { - private var host:String; - private var port:uint; - - public function FacilitatorSocket(host:String, port:uint) - { - this.host = host; - this.port = port; - } - - public function get_registration():void - { - make_request(URLRequestMethod.GET); - } - - public function post_registration(registration_data:String):void - { - var data:URLVariables = new URLVariables(); - data.client = registration_data; - make_request(URLRequestMethod.POST, data); - } - - private function fail():void - { - dispatchEvent(new FacilitatorSocketEvent(FacilitatorSocketEvent.CONNECT_FAILED)); - } - - private function make_request(method:String, data:URLVariables = null):void - { - var request:URLRequest; - var loader:URLLoader; - - loader = new URLLoader(); - /* Get the x-www-form-encoded-values. */ - loader.dataFormat = URLLoaderDataFormat.VARIABLES; - loader.addEventListener(Event.COMPLETE, on_complete_event); - loader.addEventListener(SecurityErrorEvent.SECURITY_ERROR, on_security_error_event); - loader.addEventListener(IOErrorEvent.IO_ERROR, on_io_error_event); - - request = new URLRequest(url); - request.data = data; - request.method = method; - loader.load(request); - } - - private function on_complete_event(event:Event):void - { - try { - var client_id:String = event.target.data.client; - var relay_addr:String = event.target.data.relay; - if (client_id == "") { - dispatchEvent(new FacilitatorSocketEvent(FacilitatorSocketEvent.REGISTRATIONS_EMPTY)); - } else { - dispatchEvent(new FacilitatorSocketEvent(FacilitatorSocketEvent.REGISTRATION_RECEIVED, client_id, relay_addr)); - } - } catch (e:Error) { - /* error is thrown for POST when we don't care about - the response anyways */ - } - - event.target.close() - } - - private function on_io_error_event(event:IOErrorEvent):void - { - fail(); - } - - private function on_security_error_event(event:SecurityErrorEvent):void - { - fail(); - } - - private function get url():String - { - return "http://" + encodeURIComponent(host) - + ":" + encodeURIComponent(port.toString()) + "/"; - } - } -} diff --git a/RTMFPProxyPair.as b/RTMFPProxyPair.as deleted file mode 100644 index 346d63c..0000000 --- a/RTMFPProxyPair.as +++ /dev/null @@ -1,101 +0,0 @@ -package -{ - import flash.events.Event; - import flash.events.EventDispatcher; - import flash.events.ProgressEvent; - import flash.net.Socket; - import flash.utils.ByteArray; - - import rtmfp.CirrusSocket; - import rtmfp.RTMFPSocket; - import rtmfp.events.RTMFPSocketEvent; - - public class RTMFPProxyPair extends ProxyPair - { - private var cirrus_socket:CirrusSocket; - private var client_socket:RTMFPSocket; - private var listen_stream:String; - - public function RTMFPProxyPair(ui:swfcat, cirrus_socket:CirrusSocket, listen_stream:String) - { - super(this, ui); - - log("Starting RTMFP proxy pair on stream " + listen_stream); - - this.cirrus_socket = cirrus_socket; - this.listen_stream = listen_stream; - - setup_client_socket(); - } - - override public function set client(client_addr:Object):void - { - this.client_addr = client_addr; - log("Client: connecting to " + client_addr.peer + " on stream " + client_addr.stream + "."); - client_socket.connect(client_addr.peer, client_addr.stream); - } - - override public function close():void - { - super.close(); - if (client_socket != null && client_socket.connected) { - client_socket.close(); - } - dispatchEvent(new Event(Event.CLOSE)); - } - - override public function get connected():Boolean - { - return (super.connected && client_socket != null && client_socket.connected); - } - - override protected function transfer_bytes(src:Object, dst:Object, num_bytes:uint):void - { - var bytes:ByteArray = new ByteArray(); - - if (src == null) { - src = client_socket; - RTMFPSocket(src).readBytes(bytes, 0, num_bytes); - log("RTMFPProxyPair: read " + num_bytes + " bytes from client, writing to relay."); - Socket(dst).writeBytes(bytes); - } - - if (dst == null) { - dst = client_socket; - Socket(src).readBytes(bytes, 0, num_bytes); - log("RTMFPProxyPair: read " + num_bytes + " bytes from relay, writing to client."); - RTMFPSocket(dst).writeBytes(bytes); - } - } - - private function setup_client_socket():void - { - client_socket = new RTMFPSocket(cirrus_socket); - client_socket.addEventListener(RTMFPSocketEvent.CONNECT_FAILED, function (e:RTMFPSocketEvent):void { - log("Client: connection failed to " + client_addr.peer + " on stream " + client_addr.stream + "."); - }); - client_socket.addEventListener(RTMFPSocketEvent.CONNECT_SUCCESS, function (e:RTMFPSocketEvent):void { - log("Client: connected to " + client_addr.peer + " on stream " + client_addr.stream + "."); - if (connected) { - dispatchEvent(new Event(Event.CONNECT)); - } - }); - client_socket.addEventListener(RTMFPSocketEvent.PEER_CONNECTED, function (e:RTMFPSocketEvent):void { - log("Peer connected."); - }); - client_socket.addEventListener(RTMFPSocketEvent.PEER_DISCONNECTED, function (e:RTMFPSocketEvent):void { - log("Client: disconnected from " + client_addr.peer + "."); - close(); - }); - client_socket.addEventListener(RTMFPSocketEvent.PLAY_STARTED, function (e:RTMFPSocketEvent):void { - log("Play started."); - }); - client_socket.addEventListener(RTMFPSocketEvent.PUBLISH_STARTED, function (e:RTMFPSocketEvent):void { - log("Publishing started."); - }); - client_socket.addEventListener(ProgressEvent.SOCKET_DATA, client_to_relay); - - client_socket.listen(listen_stream); - } - } -} \ No newline at end of file diff --git a/TCPProxyPair.as b/TCPProxyPair.as deleted file mode 100644 index de18dd6..0000000 --- a/TCPProxyPair.as +++ /dev/null @@ -1,77 +0,0 @@ -package -{ - import flash.events.Event; - import flash.events.EventDispatcher; - import flash.events.IOErrorEvent; - import flash.events.ProgressEvent; - import flash.events.SecurityErrorEvent; - import flash.net.Socket; - import flash.utils.ByteArray; - - public class TCPProxyPair extends ProxyPair - { - private var client_socket:Socket; - - public function TCPProxyPair(ui:swfcat) - { - super(this, ui); - - log("Starting TCP proxy pair"); - setup_client_socket(); - } - - override public function set client(client_addr:Object):void - { - this.client_addr = client_addr; - log("Client: connecting to " + client_addr.host + ":" + client_addr.port + "."); - client_socket.connect(client_addr.host, client_addr.port); - } - - override public function close():void - { - super.close(); - if (client_socket != null && client_socket.connected) { - client_socket.close(); - } - dispatchEvent(new Event(Event.CLOSE)); - } - - override public function get connected():Boolean - { - return (super.connected && client_socket != null && client_socket.connected); - } - - override protected function transfer_bytes(src:Object, dst:Object, num_bytes:uint):void - { - var bytes:ByteArray = new ByteArray(); - - if (src == null) { - src = client_socket; - } - - if (dst == null) { - dst = client_socket; - } - - Socket(src).readBytes(bytes, 0, num_bytes); - log("TCPProxyPair: transferring " + num_bytes + " bytes."); - Socket(dst).writeBytes(bytes); - } - - private function setup_client_socket():void - { - client_socket = new Socket(); - - client_socket.addEventListener(Event.CONNECT, function (e:Event):void { - log("Client: connected to " + client_addr.host + ":" + client_addr.port + "."); - if (connected) { - dispatchEvent(new Event(Event.CONNECT)); - } - }); - client_socket.addEventListener(Event.CLOSE, socket_error("Client: closed")); - client_socket.addEventListener(IOErrorEvent.IO_ERROR, socket_error("Client: I/O error")); - client_socket.addEventListener(SecurityErrorEvent.SECURITY_ERROR, socket_error("Client: security error")) - client_socket.addEventListener(ProgressEvent.SOCKET_DATA, client_to_relay); - } - } -} diff --git a/events/FacilitatorSocketEvent.as b/events/FacilitatorSocketEvent.as deleted file mode 100644 index 5787309..0000000 --- a/events/FacilitatorSocketEvent.as +++ /dev/null @@ -1,24 +0,0 @@ -package events -{ - import flash.events.Event; - - public class FacilitatorSocketEvent extends Event - { - public static const CONNECT_CLOSED:String = "connectClosed"; - public static const CONNECT_FAILED:String = "connectFailed"; - public static const CONNECT_SUCCESS:String = "connectSuccess"; - public static const REGISTRATION_RECEIVED:String = "registrationReceived"; - public static const REGISTRATION_FAILED:String = "registrationFailed"; - public static const REGISTRATIONS_EMPTY:String = "registrationsEmpty"; - - public var client:String; - public var relay:String; - - public function FacilitatorSocketEvent(type:String, client:String = null, relay:String = null, bubbles:Boolean = false, cancelable:Boolean = false) - { - super(type, bubbles, cancelable); - this.client = client; - this.relay = relay; - } - } -} diff --git a/rtmfp/CirrusSocket.as b/rtmfp/CirrusSocket.as deleted file mode 100644 index 071ac0d..0000000 --- a/rtmfp/CirrusSocket.as +++ /dev/null @@ -1,142 +0,0 @@ -/* CirrusSocket abstraction - * ------------------------ - * Manages the NetConnection portion of RTMFP and also handles - * the handshake between two Flash players to decide what their - * data stream names will be. - * - * TODO: consider using farNonce/nearNonce instead of sending bytes? - */ - -package rtmfp -{ - import flash.events.Event; - import flash.events.EventDispatcher; - import flash.events.IOErrorEvent; - import flash.events.NetStatusEvent; - import flash.events.ProgressEvent; - import flash.events.SecurityErrorEvent; - import flash.net.NetConnection; - import flash.utils.clearInterval; - import flash.utils.setInterval; - - import rtmfp.RTMFPSocket; - import rtmfp.events.CirrusSocketEvent; - import rtmfp.events.RTMFPSocketEvent; - - [Event(name=CirrusSocketEvent.CONNECT_CLOSED, type="com.flashproxy.rtmfp.events.CirrusSocketEvent")] - [Event(name=CirrusSocketEvent.CONNECT_FAILED, type="com.flashproxy.rtmfp.events.CirrusSocketEvent")] - [Event(name=CirrusSocketEvent.CONNECT_SUCCESS, type="com.flashproxy.rtmfp.events.CirrusSocketEvent")] - [Event(name=CirrusSocketEvent.HELLO_RECEIVED, type="com.flashproxy.rtmfp.events.CirrusSocketEvent")] - public class CirrusSocket extends EventDispatcher - { - private static const CONNECT_TIMEOUT:uint = 4000; // in milliseconds - - /* We'll append a unique number to the DATA_STREAM_PREFIX for each - new stream we create so that we have unique streams per player. */ - private static const DATA_STREAM_PREFIX:String = "DATA"; - private var data_stream_suffix:uint = 0; - - /* Connection to the Cirrus rendezvous service */ - public var connection:NetConnection; - - /* Timeouts */ - private var connect_timeout:int; - private var hello_timeout:int; - - public function CirrusSocket() - { - connection = new NetConnection(); - connection.addEventListener(NetStatusEvent.NET_STATUS, on_net_status_event); - connection.addEventListener(IOErrorEvent.IO_ERROR, on_io_error_event); - connection.addEventListener(SecurityErrorEvent.SECURITY_ERROR, on_security_error_event); - - /* Set up a client object to handle the hello callback */ - var client:Object = new Object(); - client.onRelay = on_hello; - connection.client = client; - } - - public function connect(addr:String, key:String):void - { - if (!this.connected) { - connect_timeout = setInterval(fail, CONNECT_TIMEOUT); - connection.connect(addr, key); - } else { - throw new Error("Cannot connect Cirrus socket: already connected."); - } - } - - public function close():void - { - if (this.connected) { - connection.close(); - } else { - throw new Error("Cannot close Cirrus socket: not connected."); - } - } - - public function get connected():Boolean - { - return (connection != null && connection.connected); - } - - public function get id():String - { - if (this.connected) { - return connection.nearID; - } - - return null; - } - - public function get local_stream_name():String - { - return DATA_STREAM_PREFIX + data_stream_suffix; - } - - /* Sends a hello message to the Flash player with Cirrus ID "id" - We use this new call protocol outlined here: - http://forums.adobe.com/thread/780788?tstart=0 */ - public function send_hello(id:String):void - { - if (this.connected) { - connection.call("relay", null, id, local_stream_name); - } else { - throw new Error("Cannot send hello: Cirrus socket not connected."); - } - } - -/*************************** PRIVATE HELPER FUNCTIONS *************************/ - - private function fail():void - { - clearInterval(connect_timeout); - dispatchEvent(new CirrusSocketEvent(CirrusSocketEvent.CONNECT_FAILED)); - } - - private function on_hello(peer:String, ...args):void - { - var stream:String = args[0]; - dispatchEvent(new CirrusSocketEvent(CirrusSocketEvent.HELLO_RECEIVED, peer, stream)); - data_stream_suffix++; - } - - private function on_io_error_event(event:IOErrorEvent):void - { - fail(); - } - - private function on_net_status_event(event:NetStatusEvent):void - { - if (event.info.code == "NetConnection.Connect.Success") { - clearInterval(connect_timeout); - dispatchEvent(new CirrusSocketEvent(CirrusSocketEvent.CONNECT_SUCCESS)); - } - } - - private function on_security_error_event(event:SecurityErrorEvent):void - { - fail(); - } - } -} diff --git a/rtmfp/RTMFPSocket.as b/rtmfp/RTMFPSocket.as deleted file mode 100644 index 4efe702..0000000 --- a/rtmfp/RTMFPSocket.as +++ /dev/null @@ -1,202 +0,0 @@ -package rtmfp -{ - import flash.events.Event; - import flash.events.EventDispatcher; - import flash.events.IOErrorEvent; - import flash.events.NetStatusEvent; - import flash.events.ProgressEvent; - import flash.events.SecurityErrorEvent; - import flash.net.NetConnection; - import flash.net.NetStream; - import flash.utils.ByteArray; - import flash.utils.clearTimeout; - import flash.utils.setTimeout; - - import rtmfp.CirrusSocket; - import rtmfp.RTMFPSocketClient; - import rtmfp.events.CirrusSocketEvent; - import rtmfp.events.RTMFPSocketEvent; - - [Event(name=RTMFPSocketEvent.CONNECT_FAILED, type="com.flashproxy.rtmfp.events.RTMFPSocketEvent")] - [Event(name=RTMFPSocketEvent.CONNECT_CLOSED, type="com.flashproxy.rtmfp.events.RTMFPSocketEvent")] - [Event(name=RTMFPSocketEvent.CONNECT_SUCCESS, type="com.flashproxy.rtmfp.events.RTMFPSocketEvent")] - [Event(name=RTMFPSocketEvent.PEER_CONNECTED, type="com.flashproxy.rtmfp.events.RTMFPSocketEvent")] - [Event(name=RTMFPSocketEvent.PEER_DISCONNECTED, type="com.flashproxy.rtmfp.events.RTMFPSocketEvent")] - [Event(name=RTMFPSocketEvent.PLAY_STARTED, type="com.flashproxy.rtmfp.events.RTMFPSocketEvent")] - [Event(name=RTMFPSocketEvent.PUBLISH_STARTED, type="com.flashproxy.rtmfp.events.RTMFPSocketEvent")] - [Event(name=RTMFPSocketEvent.PUBLISH_FAILED, type="com.flashproxy.rtmfp.events.RTMFPSocketEvent")] - public class RTMFPSocket extends EventDispatcher - { - private const CONNECT_TIMEOUT:uint = 10000; - - private var s_c:CirrusSocket; - - private var recv_stream:NetStream; - private var send_stream:NetStream; - - private var peer_stream:NetStream; - - private var connect_timeout:int; - - public function RTMFPSocket(s_c:CirrusSocket) - { - this.s_c = s_c; - recv_stream = null; - send_stream = null; - connect_timeout = 0; - } - - /* Tears down this RTMFPSocket, closing both its streams. - To be used when destroying this object. */ - public function close():void - { - if (send_stream != null) { - s_c.connection.removeEventListener(NetStatusEvent.NET_STATUS, on_stream_disconnection_event); - send_stream.close(); - } - - if (recv_stream != null) { - recv_stream.close(); - } - } - - /* In RTMFP, you connect to a remote socket by requesting to - "play" the data being published on a named stream by the - host identified by id. The connection request goes through - the Cirrus server which handles the mapping from id/stream - to IP/port and any necessary NAT traversal. */ - public function connect(id:String, stream:String):void - { - recv_stream = new NetStream(s_c.connection, id); - var client:RTMFPSocketClient = new RTMFPSocketClient(); - client.addEventListener(ProgressEvent.SOCKET_DATA, on_data_available, false, 0, true); - client.addEventListener(RTMFPSocketClient.CONNECT_ACKNOWLEDGED, on_connect_acknowledged, false, 0, true); - recv_stream.client = client; - recv_stream.addEventListener(NetStatusEvent.NET_STATUS, on_recv_stream_event); - recv_stream.play(stream); - connect_timeout = setTimeout(on_connect_timeout, CONNECT_TIMEOUT, recv_stream); - } - - public function get connected():Boolean - { - return (recv_stream != null && recv_stream.client != null && - RTMFPSocketClient(recv_stream.client).connect_acknowledged); - } - - /* In RTMFP, you open a listening socket by publishing a named - stream that others can connect to instead of listening on a port. - You register this stream with the Cirrus server via the Cirrus - socket so that it can redirect connection requests for an id/stream - tuple to this socket. */ - public function listen(stream:String):void - { - // apparently streams don't get disconnection events, only the NetConnection - // object does...bleh. - s_c.connection.addEventListener(NetStatusEvent.NET_STATUS, on_stream_disconnection_event); - - send_stream = new NetStream(s_c.connection, NetStream.DIRECT_CONNECTIONS); - send_stream.addEventListener(NetStatusEvent.NET_STATUS, on_send_stream_event); - var client:Object = new Object(); - client.onPeerConnect = on_peer_connect; - send_stream.client = client; - send_stream.publish(stream); - } - - public function get peer():String - { - if (!connected) return null; - return recv_stream.farID; - } - - public function get peer_connected():Boolean - { - return send_stream.peerStreams.length > 0; - } - - public function readBytes(bytes:ByteArray, offset:uint = 0, length:uint = 0):void - { - if (recv_stream != null && recv_stream.client != null) { - recv_stream.client.bytes.readBytes(bytes, offset, length); - } - } - - public function writeBytes(bytes:ByteArray):void - { - if (send_stream != null && peer_connected) { - send_stream.send(RTMFPSocketClient.DATA_AVAILABLE, bytes); - } - } - - /* Listens for acknowledgement of a connection attempt to a - remote peer. */ - private function on_connect_acknowledged(event:Event):void - { - clearTimeout(connect_timeout); - dispatchEvent(new RTMFPSocketEvent(RTMFPSocketEvent.CONNECT_SUCCESS, recv_stream)); - } - - /* If we don't get a connection acknowledgement by the time this - timeout function is called, we punt. */ - private function on_connect_timeout(peer:NetStream):void - { - if (!this.connected) { - dispatchEvent(new RTMFPSocketEvent(RTMFPSocketEvent.CONNECT_FAILED, recv_stream)); - } - } - - private function on_data_available(event:ProgressEvent):void - { - dispatchEvent(event); - } - - private function on_recv_stream_event(event:NetStatusEvent):void - { - /* empty, here for symmetry */ - } - - /* This function gets called whenever someone tries to connect - to this socket's send_stream tuple. We don't want multiple - peers connecting at once, so we disallow that. The socket - acknowledges the connection back to the peer with the - SET_CONNECTION_ACKNOWLEDGED message. */ - private function on_peer_connect(peer:NetStream):Boolean - { - if (peer_connected) { - return false; - } - - peer_stream = peer; - peer.send(RTMFPSocketClient.SET_CONNECT_ACKNOWLEDGED); - - // need to do this in a timeout so that this function can - // return true to finalize the connection before firing the event - setTimeout(function (stream:NetStream):void { - dispatchEvent(new RTMFPSocketEvent(RTMFPSocketEvent.PEER_CONNECTED, stream)); - }, 0, peer); - - return true; - } - - private function on_send_stream_event(event:NetStatusEvent):void - { - switch (event.info.code) { - case "NetStream.Publish.Start": - dispatchEvent(new RTMFPSocketEvent(RTMFPSocketEvent.PUBLISH_STARTED)); - break; - case "NetStream.Publish.BadName": - dispatchEvent(new RTMFPSocketEvent(RTMFPSocketEvent.PUBLISH_FAILED)); - break; - default: - break; - } - } - - private function on_stream_disconnection_event(event:NetStatusEvent):void - { - if (event.info.code == "NetStream.Connect.Closed" && event.info.stream === peer_stream) { - dispatchEvent(new RTMFPSocketEvent(RTMFPSocketEvent.PEER_DISCONNECTED)); - } - } - } -} - diff --git a/rtmfp/RTMFPSocketClient.as b/rtmfp/RTMFPSocketClient.as deleted file mode 100644 index b917bcb..0000000 --- a/rtmfp/RTMFPSocketClient.as +++ /dev/null @@ -1,46 +0,0 @@ -package rtmfp -{ - import flash.events.Event; - import flash.events.EventDispatcher; - import flash.events.ProgressEvent; - import flash.utils.ByteArray; - - [Event(name=RTMFPSocketClient.CONNECT_ACKNOWLEDGED, type="flash.events.Event")] - public dynamic class RTMFPSocketClient extends EventDispatcher { - public static const DATA_AVAILABLE:String = "data_available"; - public static const CONNECT_ACKNOWLEDGED:String = "connectAcknowledged"; - public static const SET_CONNECT_ACKNOWLEDGED:String = "set_connect_acknowledged"; - - private var _bytes:ByteArray; - private var _connect_acknowledged:Boolean; - - public function RTMFPSocketClient() - { - super(); - _bytes = new ByteArray(); - _connect_acknowledged = false; - } - - public function get bytes():ByteArray - { - return _bytes; - } - - public function data_available(bytes:ByteArray):void - { - bytes.readBytes(_bytes, _bytes.length, 0); - dispatchEvent(new ProgressEvent(ProgressEvent.SOCKET_DATA, false, false, _bytes.bytesAvailable, _bytes.bytesAvailable)); - } - - public function get connect_acknowledged():Boolean - { - return _connect_acknowledged; - } - - public function set_connect_acknowledged():void - { - _connect_acknowledged = true; - dispatchEvent(new Event(CONNECT_ACKNOWLEDGED)); - } - } -} diff --git a/rtmfp/events/CirrusSocketEvent.as b/rtmfp/events/CirrusSocketEvent.as deleted file mode 100644 index 831ad73..0000000 --- a/rtmfp/events/CirrusSocketEvent.as +++ /dev/null @@ -1,22 +0,0 @@ -package rtmfp.events -{ - import flash.events.Event; - - public class CirrusSocketEvent extends Event - { - public static const CONNECT_CLOSED:String = "connectClosed"; - public static const CONNECT_FAILED:String = "connectFailed"; - public static const CONNECT_SUCCESS:String = "connectSuccess"; - public static const HELLO_RECEIVED:String = "helloReceived"; - - public var peer:String; - public var stream:String; - - public function CirrusSocketEvent(type:String, peer:String = null, stream:String = null, bubbles:Boolean = false, cancelable:Boolean = false) - { - super(type, bubbles, cancelable); - this.peer = peer; - this.stream = stream; - } - } -} diff --git a/rtmfp/events/RTMFPSocketEvent.as b/rtmfp/events/RTMFPSocketEvent.as deleted file mode 100644 index 87a7e09..0000000 --- a/rtmfp/events/RTMFPSocketEvent.as +++ /dev/null @@ -1,25 +0,0 @@ -package rtmfp.events -{ - import flash.events.Event; - import flash.net.NetStream; - - public class RTMFPSocketEvent extends Event - { - public static const CONNECT_FAILED:String = "connectFailed"; - public static const CONNECT_SUCCESS:String = "connectSuccess"; - public static const CONNECT_CLOSED:String = "connectClosed" - public static const PEER_CONNECTED:String = "peerConnected"; - public static const PEER_DISCONNECTED:String = "peerDisconnected"; - public static const PLAY_STARTED:String = "playStarted"; - public static const PUBLISH_STARTED:String = "publishStarted"; - public static const PUBLISH_FAILED:String = "publishFailed"; - - public var stream:NetStream; - - public function RTMFPSocketEvent(type:String, stream:NetStream = null, bubbles:Boolean = false, cancelable:Boolean = false) - { - super(type, bubbles, cancelable); - this.stream = stream; - } - } -}

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[flashproxy/master] Minor cleanup.
by dcf＠torproject.org 12 Jun '11

12 Jun '11

commit 5e8eca1361083409847d4e6c94e5d84adf8d2673 Author: David Fifield <david(a)bamsoftware.com> Date: Sun Jun 12 01:08:49 2011 -0700 Minor cleanup. --- swfcat.as | 12 ++++-------- 1 files changed, 4 insertions(+), 8 deletions(-) diff --git a/swfcat.as b/swfcat.as index d9e9bc6..1d99ad4 100644 --- a/swfcat.as +++ b/swfcat.as @@ -29,8 +29,8 @@ package port: 9002 }; - /* Default Tor client to use in case of RTMFP connection */ - private const DEFAULT_TOR_CLIENT_ADDR:Object = { + /* Local Tor client to use in case of RTMFP connection. */ + private const LOCAL_TOR_CLIENT_ADDR:Object = { host: "127.0.0.1", port: 9002 }; @@ -45,8 +45,6 @@ package // Seconds. private const RATE_LIMIT_HISTORY:Number = 5.0; - private var proxy_mode:Boolean; - /* TextField for debug output. */ private var output_text:TextField; @@ -103,15 +101,13 @@ package else addChild(badge); - proxy_mode = (this.loaderInfo.parameters["proxy"] != null); - fac_addr = get_param_addr("facilitator", DEFAULT_FACILITATOR_ADDR); if (!fac_addr) { puts("Error: Facilitator spec must be in the form \"host:port\"."); return; } - if (proxy_mode) + if (this.loaderInfo.parameter["proxy"]) proxy_main(); else client_main(); @@ -228,7 +224,7 @@ package proxy_pair = new ProxyPair(this, rs, function ():void { /* Do nothing; already connected. */ }, s_t, function ():void { - s_t.connect(DEFAULT_TOR_CLIENT_ADDR.host, DEFAULT_TOR_CLIENT_ADDR.port); + s_t.connect(LOCAL_TOR_CLIENT_ADDR.host, LOCAL_TOR_CLIENT_ADDR.port); }); proxy_pair.connect(); }

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[flashproxy/master] Merge branch 'rtmfp'
by dcf＠torproject.org 12 Jun '11

12 Jun '11

commit d7f92def28704245e08033964cc8f98c55d3b568 Merge: c9df471 f6e2fb7 Author: David Fifield <david(a)bamsoftware.com> Date: Sun Jun 12 01:44:33 2011 -0700 Merge branch 'rtmfp' Conflicts: ProxyPair.as swfcat.as Makefile | 2 +- ProxyPair.as | 72 ++++++++++--------- README | 77 +++++++++++++-------- RTMFPSocket.as | 209 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ design.txt | 19 ++++-- swfcat.as | 154 +++++++++++++++++++++++++++++++++++------ 6 files changed, 441 insertions(+), 92 deletions(-)

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[flashproxy/master] Update documentation for combined TCP/RTMFP proxy.
by dcf＠torproject.org 12 Jun '11

12 Jun '11

commit f6e2fb73a707c34760326fa760406a38f7144c35 Author: David Fifield <david(a)bamsoftware.com> Date: Sun Jun 12 01:40:11 2011 -0700 Update documentation for combined TCP/RTMFP proxy. --- README | 73 +++++++++++++++++++++++++++++++++++++----------------------- design.txt | 19 +++++++++++---- 2 files changed, 59 insertions(+), 33 deletions(-) diff --git a/README b/README index ff12174..4b6a2dc 100644 --- a/README +++ b/README @@ -16,6 +16,10 @@ There are five main parts. Our terminology for each part is in quotes. 5. A Tor "relay," which is just a normal Tor relay except that its host must also serve a Flash crossdomain policy. +A proxy is capable of connecting to a client in two ways: Using a normal +TCP connection, or over Adobe RTMFP, which involves a third party but is +capable of traversing NAT. + == Demonstration page https://crypto.stanford.edu/flashproxy/ @@ -28,42 +32,56 @@ Download the (free software) Flex SDK. http://opensource.adobe.com/wiki/display/flexsdk/Flex+SDK Put its bin directory in your PATH. The important executable is mxmlc. -You need a Cirrus developer key from Adobe. Put it in the environment -variable CIRRUS_KEY so it can be found by Makefile. +For RTMFP support, you need a Cirrus developer key from Adobe. Put it in +the environment variable CIRRUS_KEY so it can be found by Makefile. $ export CIRRUS_KEY=XXXXXXXXXXXXXXXXXXXXXXXX-YYYYYYYYYYYY To build, run $ make Copy the resulting swfcat.swf file to a web server. -On the computer that will be the facilitator, run +=== Connecting + +On the Tor relay, run sudo ./crossdomaind.py - ./facilitator.py -crossdomaind.py needs to be run on any server that will accept -connections from a Flash proxy. It serves a chunk of data on port 843. +In general, any computer that a proxy connects to needs to serve a +crossdomain policy, but the connector and facilitator have it built in. + +On the facilitator, run + ./facilitator.py -r <relay-ip> The facilitator runs on port 9002 by default. +In a browser somewhere, open swfcat.swf and pass it a parameters telling it +which facilitator to use, for example + http://www.example.com/swfcat.swf?facilitator=<facilitator-ip>:9002&debug=1 + +There are two ways in which the client can receive connections: over TCP +or RTMFP. TCP doesn't send traffic to anyone other than the facilitator +and the proxy, but it only works if you have a public IP address. RTMFP +coordinates connections using a server controlled by Adobe, but works +when the client is behind a NAT. + +To connect with TCP, run + ./connector.py -f <facilitator-ip> +(If you are running the facilitator locally, be sure to use an external +IP address, not 127.0.0.1.) The connector informs the facilitator that +it wants a connection, then listens on 0.0.0.0:9000 and 127.0.0.1:9001. +The proxy will connect on port 9000 and the local Tor will connect on +9001. + +To connect with RTMFP, run + ./connector.py 127.0.0.1:9001 127.0.0.1:9002 +and open in a browser + http://www.example.com/swfcat.swf?client=1&facilitator=<facilitator-ip>:9002 +In this case, it is swfcat running in client mode that registers with +the facilitator. The connector acts to join the local swfcat and the +local Tor client. + The client needs to be running a version of Tor that supports the Socks4Proxy configuration. This means version 0.2.2.1-alpha or later--not the current stable release. -On the client, run - ./connector.py 127.0.0.1:9001 127.0.0.1:9002 -Also on the client, open up the browser to swfcat.swf. Passing no -arguments should give you good defaults (expects the facilitator running -on Nate's server). swfcat will connect to the Cirrus server to -obtain a client ID which it then registers with the facilitator. - -In a browser somewhere, open swfcat.swf and pass parameters telling it -which facilitator to use and to operate in proxy mode. - http://www.example.com/swfcat.swf?proxy=true&facilitator=<FACILITATOR_IP>:9002&debug=1 -This swfcat will also connect to the Cirrus server to obtain a client ID, -and then it will ping the facilitator to check if there are any registered -client IDs. If there is one, it will open a RTMFP connection (coordinated -by the Cirrus server) to the client and an additional connection to a -Tor relay. - -Back on the client, start Tor with the following configuration: +Start Tor with the following configuration: UseBridges 1 Bridge 127.0.0.1:9001 Socks4Proxy 127.0.0.1:9001 @@ -73,8 +91,8 @@ If you see messages like [notice] no known bridge descriptors running yet; stalling try deleting the files in ~/.tor or /var/lib/tor. -You will be able to see byte counts flowing in both browsers displaying -swfcat.swf (client and proxy), and eventually be able to build a circuit. +You will be able to see byte counts flowing in the browser window, and +eventually be able to build a circuit. == Rationale @@ -92,16 +110,15 @@ policy. Clients register with the facilitator by sending an HTTP message: POST / HTTP/1.0\r\n \r\n - client=<CIRRUS-CLIENT-ID> + client=<ip-addr/rtmfp-id> The Flash proxy also gets a client address over HTTP: GET / HTTP/1.0\r\n \r\n The server sends back address specifications of a client and a relay in an HTTP respose. HTTP/1.0 200 OK\r\n - Server: BaseHTTP/0.3 Python/2.5.2\r\n \r\n - client=<CIRRUS-CLIENT-ID>&relay=9.9.9.9:9001 + client=<ip-addr/rtmfp-id>&relay=<relay-ip> == ActionScript programming diff --git a/design.txt b/design.txt index 27be8ab..2d5ad2b 100644 --- a/design.txt +++ b/design.txt @@ -101,13 +101,19 @@ Design of Flash proxies On startup, the connector sends a registration message to the facilitator, informing the facilitator that it is waiting for a connection. The facilitator will later hand this registration to a - Flash proxy. The registration message is an HTTP POST request of this + Flash proxy. The registration message is an HTTP POST request of the form: POST / HTTP/1.0 client=[<address>]:<port> + or the form: + + POST / HTTP/1.0 + + client=[<rtmfp-id>]:<port> + The facilitator sends a 200 reply if the registration was successful and an error status otherwise. If the connector omits the [<address>] part, the facilitator will automatically fill it in based on the HTTP @@ -141,11 +147,14 @@ Design of Flash proxies client=[<address>:<port>]&relay=<address>:<port> - If <address>:<port> is missing, it means that there are no client - registrations for this proxy. + or this: + + client=[<rtmfp-id>]&relay=<address>:<port> + + If the value for the client parameter is empty, it means that there are no + client registrations for this proxy. - The Flash proxy may serve more than one relay–client pair at once. It - limits its own bandwidth to 10 KB/s (combined upload/download). + The Flash proxy may serve more than one relay–client pair at once. 8. Behavior of the facilitator

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[flashproxy/master] Make proxy mode the default in swfcat.
by dcf＠torproject.org 12 Jun '11

12 Jun '11

commit f0e063240a4c3d673256d82f42fbecd4e35ba1e5 Author: David Fifield <david(a)bamsoftware.com> Date: Sun Jun 12 01:21:59 2011 -0700 Make proxy mode the default in swfcat. In other words, use client=true instead of nothing for client mode, and nothing instead of proxy=true for proxy mode. This makes it a drop-in replacement for master swfcat. --- swfcat.as | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/swfcat.as b/swfcat.as index 1d99ad4..27752e9 100644 --- a/swfcat.as +++ b/swfcat.as @@ -107,10 +107,10 @@ package return; } - if (this.loaderInfo.parameter["proxy"]) - proxy_main(); - else + if (this.loaderInfo.parameters["client"]) client_main(); + else + proxy_main(); } /* Get an address structure from the given movie parameter, or the given

1 0