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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Original author: ekr@rtfm.com
+
+// Some of this code is cut-and-pasted from nICEr. Copyright is:
+
+/*
+Copyright (c) 2007, Adobe Systems, Incorporated
+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.
+
+* Neither the name of Adobe Systems, Network Resonance nor the names of its
+ contributors may be used to endorse or promote products derived from
+ this software without specific prior written permission.
+
+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
+OWNER 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.
+*/
+
+// This is a wrapper around the nICEr ICE stack
+#ifndef nricemediastream_h__
+#define nricemediastream_h__
+
+#include <string>
+#include <vector>
+
+#include "sigslot.h"
+
+#include "mozilla/RefPtr.h"
+#include "mozilla/UniquePtr.h"
+#include "nscore.h"
+
+#include "m_cpp_utils.h"
+
+namespace mozilla {
+
+typedef struct nr_ice_ctx_ nr_ice_ctx;
+typedef struct nr_ice_peer_ctx_ nr_ice_peer_ctx;
+typedef struct nr_ice_media_stream_ nr_ice_media_stream;
+
+class NrIceCtx;
+
+struct NrIceAddr {
+ std::string host;
+ uint16_t port;
+ std::string transport;
+};
+
+/* A summary of a candidate, for use in asking which candidate
+ pair is active */
+struct NrIceCandidate {
+ enum Type { ICE_HOST, ICE_SERVER_REFLEXIVE, ICE_PEER_REFLEXIVE, ICE_RELAYED };
+
+ enum TcpType { ICE_NONE, ICE_ACTIVE, ICE_PASSIVE, ICE_SO };
+
+ NrIceAddr cand_addr;
+ NrIceAddr local_addr;
+ std::string mdns_addr;
+ Type type;
+ TcpType tcp_type;
+ std::string codeword;
+ std::string label;
+ bool trickled;
+ uint32_t priority;
+ bool is_proxied = false;
+};
+
+struct NrIceCandidatePair {
+ enum State {
+ STATE_FROZEN,
+ STATE_WAITING,
+ STATE_IN_PROGRESS,
+ STATE_FAILED,
+ STATE_SUCCEEDED,
+ STATE_CANCELLED
+ };
+
+ State state;
+ uint64_t priority;
+ // Set regardless of who nominated it. Does not necessarily mean that it is
+ // ready to be selected (ie; nominated by peer, but our check has not
+ // succeeded yet.) Note: since this implementation uses aggressive nomination,
+ // when we are the controlling agent, this will always be set if the pair is
+ // in STATE_SUCCEEDED.
+ bool nominated;
+ bool writable;
+ bool readable;
+ // Set if this candidate pair has been selected. Note: Since we are using
+ // aggressive nomination, this could change frequently as ICE runs.
+ bool selected;
+ NrIceCandidate local;
+ NrIceCandidate remote;
+ // TODO(bcampen@mozilla.com): Is it important to put the foundation in here?
+ std::string codeword;
+ uint64_t component_id;
+
+ // for RTCIceCandidatePairStats
+ uint64_t bytes_sent;
+ uint64_t bytes_recvd;
+ uint64_t ms_since_last_send;
+ uint64_t ms_since_last_recv;
+};
+
+class NrIceMediaStream {
+ public:
+ NrIceMediaStream(NrIceCtx* ctx, const std::string& id,
+ const std::string& name, size_t components);
+
+ nsresult SetIceCredentials(const std::string& ufrag, const std::string& pwd);
+ nsresult ConnectToPeer(const std::string& ufrag, const std::string& pwd,
+ const std::vector<std::string>& peer_attrs);
+ enum State { ICE_CONNECTING, ICE_OPEN, ICE_CLOSED };
+
+ State state() const { return state_; }
+
+ // The name of the stream
+ const std::string& name() const { return name_; }
+
+ // Get all the ICE attributes; used for testing
+ std::vector<std::string> GetAttributes() const;
+
+ nsresult GetLocalCandidates(std::vector<NrIceCandidate>* candidates) const;
+ nsresult GetRemoteCandidates(std::vector<NrIceCandidate>* candidates) const;
+
+ // Get all candidate pairs, whether in the check list or triggered check
+ // queue, in priority order. |out_pairs| is cleared before being filled.
+ nsresult GetCandidatePairs(std::vector<NrIceCandidatePair>* out_pairs) const;
+
+ nsresult GetDefaultCandidate(int component, NrIceCandidate* candidate) const;
+
+ // Parse trickle ICE candidate
+ nsresult ParseTrickleCandidate(const std::string& candidate,
+ const std::string& ufrag,
+ const std::string& mdns_addr);
+
+ // Disable a component
+ nsresult DisableComponent(int component);
+
+ // Get the candidate pair currently active. It's the
+ // caller's responsibility to free these.
+ nsresult GetActivePair(int component, UniquePtr<NrIceCandidate>* local,
+ UniquePtr<NrIceCandidate>* remote);
+
+ // Get the current ICE consent send status plus the timeval of the last
+ // consent update time.
+ nsresult GetConsentStatus(int component, bool* can_send, struct timeval* ts);
+
+ // The number of components
+ size_t components() const { return components_; }
+
+ bool HasStream(nr_ice_media_stream* stream) const;
+ // Signals to indicate events. API users can (and should)
+ // register for these.
+
+ // Send a packet
+ nsresult SendPacket(int component_id, const unsigned char* data, size_t len);
+
+ // Set your state to ready. Called by the NrIceCtx;
+ void Ready();
+ void Failed();
+
+ // Close the stream. Called by the NrIceCtx.
+ // Different from the destructor because other people
+ // might be holding RefPtrs but we want those writes to fail once
+ // the context has been destroyed.
+ void Close();
+
+ // So the receiver of SignalCandidate can determine which transport
+ // the candidate belongs to.
+ const std::string& GetId() const { return id_; }
+
+ sigslot::signal5<NrIceMediaStream*, const std::string&, const std::string&,
+ const std::string&, const std::string&>
+ SignalCandidate; // A new ICE candidate:
+
+ sigslot::signal1<NrIceMediaStream*> SignalReady; // Candidate pair ready.
+ sigslot::signal1<NrIceMediaStream*> SignalFailed; // Candidate pair failed.
+ sigslot::signal4<NrIceMediaStream*, int, const unsigned char*, int>
+ SignalPacketReceived; // Incoming packet
+
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(NrIceMediaStream)
+
+ private:
+ ~NrIceMediaStream();
+
+ DISALLOW_COPY_ASSIGN(NrIceMediaStream);
+
+ void CloseStream(nr_ice_media_stream** stream);
+ void DeferredCloseOldStream(const nr_ice_media_stream* old);
+ nr_ice_media_stream* GetStreamForRemoteUfrag(const std::string& ufrag);
+
+ State state_;
+ RefPtr<NrIceCtx> ctx_;
+ const std::string name_;
+ const size_t components_;
+ nr_ice_media_stream* stream_;
+ nr_ice_media_stream* old_stream_;
+ const std::string id_;
+};
+
+} // namespace mozilla
+#endif