Initial commit

include/rtc/datachannel.hpp

@@ -0,0 +1,96 @@
+/**
+ * Copyright (c) 2019 Paul-Louis Ageneau
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef RTC_DATA_CHANNEL_H
+#define RTC_DATA_CHANNEL_H
+
+#include "channel.hpp"
+#include "common.hpp"
+#include "message.hpp"
+#include "reliability.hpp"
+
+#include <atomic>
+#include <chrono>
+#include <functional>
+#include <shared_mutex>
+#include <type_traits>
+#include <shared_mutex>
+
+namespace rtc {
+
+namespace impl {
+
+struct DataChannel;
+struct PeerConnection;
+
+} // namespace impl
+
+class RTC_CPP_EXPORT DataChannel final : private CheshireCat<impl::DataChannel>, public Channel {
+public:
+	DataChannel(impl_ptr<impl::DataChannel> impl);
+	virtual ~DataChannel();
+
+	uint16_t stream() const;
+	uint16_t id() const;
+	string label() const;
+	string protocol() const;
+	Reliability reliability() const;
+
+	bool isOpen(void) const override;
+	bool isClosed(void) const override;
+	size_t maxMessageSize() const override;
+
+	void close(void) override;
+	bool send(message_variant data) override;
+	bool send(const byte *data, size_t size) override;
+	template <typename Buffer> bool sendBuffer(const Buffer &buf);
+	template <typename Iterator> bool sendBuffer(Iterator first, Iterator last);
+
+private:
+	using CheshireCat<impl::DataChannel>::impl;
+};
+
+template <typename Buffer> std::pair<const byte *, size_t> to_bytes(const Buffer &buf) {
+	using T = typename std::remove_pointer<decltype(buf.data())>::type;
+	using E = typename std::conditional<std::is_void<T>::value, byte, T>::type;
+	return std::make_pair(static_cast<const byte *>(static_cast<const void *>(buf.data())),
+	                      buf.size() * sizeof(E));
+}
+
+template <typename Buffer> bool DataChannel::sendBuffer(const Buffer &buf) {
+	auto [bytes, size] = to_bytes(buf);
+	return send(bytes, size);
+}
+
+template <typename Iterator> bool DataChannel::sendBuffer(Iterator first, Iterator last) {
+	size_t size = 0;
+	for (Iterator it = first; it != last; ++it)
+		size += it->size();
+
+	binary buffer(size);
+	byte *pos = buffer.data();
+	for (Iterator it = first; it != last; ++it) {
+		auto [bytes, len] = to_bytes(*it);
+		pos = std::copy(bytes, bytes + len, pos);
+	}
+	return send(std::move(buffer));
+}
+
+} // namespace rtc
+
+#endif