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path: root/CMakeLists.txt
Commit message (Collapse)AuthorAge
* Fix "make install" and add underscore to doc file nameest312015-09-14
| | | | | | | | Fix regression since commit: 915807f8db1f3721ad9ffc00a4863ad940010c45 "Rename doc/mapformat.txt and update doc to match SRP changes" And add an underscore to doc file name to make it more readable.
* Rename minetest-icon.svg to minetest.svg - Fixes #1564HEXcube2015-09-03
| | | | | | -Complies with the Linux standard freedesktop icon naming specs: http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html#guidelines -Ensures compatibility with icon themes -Edit minetest.desktop, CMakeLists.txt and README.md to reflect this change
* Continue with 0.4.13-devest312015-08-20
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* Bump version to 0.4.13est312015-08-20
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* Fix a typo in comment of CMakeLists.txtD Laboratory2015-07-18
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* Make Git version detection use VERSION_STRING instead of tagsShadowNinja2015-05-05
| | | | | | | | | | This fixes the problem where 0.4.12-dev versions were erroneously shown as 0.4.11-dev because the tag was added on a separate branch. It also fixes a similar issue when builders didn't fetch new tags when updating. This also removes the number-of-commits-since-tag field, since it's incompatible with this. Said field doesn't seem to be useful anyway if you have the commit hash.
* Revert the upper-case PROJECT_NAME nonsense that was part of #2402sfan52015-04-27
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* Clean up and tweak build systemShadowNinja2015-03-27
| | | | | | | | | | | | | | | | * Combine client and server man pages. * Update unit test options and available databases in man page. * Add `--worldname` to man page. * Fix a bunch of places where `"Minetest"` was used directly instead of `PROJECT_NAME`. * Disable server build by default on all operating systems. * Make `ENABLE_FREETYPE` not fail if FreeType isn't found. * Enable LevelDB, Redis, and FreeType detection by default. * Remove the `VERSION_PATCH_ORIG` hack. * Add option to search for and use system JSONCPP. * Remove broken LuaJIT version detection. * Rename `DISABLE_LUAJIT` to `ENABLE_LUAJIT`. * Rename `minetest_*` variables in `version.{h,cpp}` to `g_*`. * Clean up style of CMake files.
* Standalone bundle for OSX (w/ dependencies!)Pavel Puchkin2015-03-17
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* Uncomment version patch fieldBlockMen2015-02-18
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* Bump version to 0.4.12Perttu Ahola2015-02-18
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* Uncomment version patch fieldkwolekr2014-12-26
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* Bump version to 0.4.11kwolekr2014-12-24
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* Fix OSX packaging finallyPavel Puchkin2014-12-16
| | | | Signed-off-by: Craig Robbins <kde.psych@gmail.com>
* Add basic support for generating API documentation using DoxygenJürgen Doser2014-12-12
| | | | | | | | | | | If CMake is run and Doxygen is found, add a make target called "doc", which builds API documention in doc/html. This target is not included in the default "all" target, you have to explicitly run "make doc" to generate the documentation. If graphviz is installed, in particular, if the "dot" binary is found, doxygen is configured to generate various kinds of diagrams. Note that due to this, the first run of doxygen can take a while.
* Add ZLIBWAPI_DLL and LEVELDB_DLL CMake options Remove legacy MINGWM10_DLL ↵sfan52014-07-29
| | | | CMake option Update 32-bit buildbot (OpenAL updated, zlib updated) Change build directory for buildbots to '_build' to prevent removal of Android build files Use -win64 suffix for 64-bit Windows builds Fixes #1476
* Switch back repository to dev-mode after 0.4.10 release.sapier2014-07-07
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* Update version numbers for 0.4.10sapier2014-07-06
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* OS X compatibility fixesMartin Doege2014-06-29
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* Fix AppData path for RUN_IN_PLACE, fixes #1365sfan52014-06-13
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* Add AppData fileDavid Gumberg2014-06-13
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* Improved win32 file version informationsapier2014-03-02
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* Add check to avoid usage of broken LuaJIT < 2.0.0beta8sapier2014-02-13
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* Reenable -dev suffixKahrl2014-01-03
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* Bump version to 0.4.9kwolekr2014-01-01
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* Reenable -dev suffixPilzAdam2013-11-24
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* Bump version to 0.4.8kwolekr2013-11-24
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* Show git hash in version string at top left corner of windowKahrl2013-09-28
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* Fix installation of textures/texture_packs_here.txtPilzAdam2013-08-04
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* Fixes cmake-gui causing RUN_IN_PLACE to be always offMetaDucky2013-06-13
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* Bump version to 0.4.7PilzAdam2013-06-06
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* Install mods/mods_here.txt instead of mods/minetest/mods_here.txtPilzAdam2013-05-19
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* Remove survival and build from CMakeLists.txtPilzAdam2013-05-18
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* Remove common from CMakeLists.txt, README.txt, lua-api.txt and buildwin.shPilzAdam2013-05-18
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* Install menu textures of minetest_gamePilzAdam2013-05-04
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* Revert "Fix to be able to build from dir different than source dir"kwolekr2013-04-07
| | | | This commit broke RUN_IN_PLACE
* Fix to be able to build from dir different than source dirDiego Martínez2013-04-06
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* Install "build" and "survival" games with "make install"Diego Martínez2013-04-05
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* Bump version to 0.4.6kwolekr2013-04-03
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* Install locales in minetest directory, so they are correctly loadedZeg92013-03-30
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* CMakeLists.txt: Add games/common to be installed when availablePerttu Ahola2013-03-22
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* Bump version to 0.4.5kwolekr2013-03-04
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* Add Freetype supportIlya Zhuravlev2013-02-14
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* Call this 0.4.4-d1 because it has a protocol addition since 0.4.4Perttu Ahola2013-01-02
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* Bump version to 0.4.4Perttu Ahola2012-12-06
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* Install shaders properlyPerttu Ahola2012-12-02
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* Change version to 0.4.4-dev because... ehm... why it wasn't that already?Perttu Ahola2012-11-29
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* Bump version to 0.4.4 as this isn't compatible with 0.4.3Perttu Ahola2012-11-26
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* Version 0.4.3Perttu Ahola2012-09-05
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* Version 0.4.3-rc0; increase PROTOCOL_VERSION due to backwards-incompatible ↵Perttu Ahola2012-09-05
| | | | InventoryList width field
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-13 06:12:39 +0000
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/*
Minetest
Copyright (C) 2013-2017 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2017 celeron55, Loic Blot <loic.blot@unix-experience.fr>

This program 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 program 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 program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "connectionthreads.h"
#include "log.h"
#include "profiler.h"
#include "settings.h"
#include "network/networkpacket.h"
#include "util/serialize.h"

namespace con
{

/******************************************************************************/
/* defines used for debugging and profiling                                   */
/******************************************************************************/
#ifdef NDEBUG
#define LOG(a) a
#define PROFILE(a)
#undef DEBUG_CONNECTION_KBPS
#else
/* this mutex is used to achieve log message consistency */
std::mutex log_conthread_mutex;
#define LOG(a)                                                                \
	{                                                                         \
	MutexAutoLock loglock(log_conthread_mutex);                                 \
	a;                                                                        \
	}
#define PROFILE(a) a
//#define DEBUG_CONNECTION_KBPS
#undef DEBUG_CONNECTION_KBPS
#endif

/* maximum number of retries for reliable packets */
#define MAX_RELIABLE_RETRY 5

#define WINDOW_SIZE 5

static u16 readPeerId(u8 *packetdata)
{
	return readU16(&packetdata[4]);
}
static u8 readChannel(u8 *packetdata)
{
	return readU8(&packetdata[6]);
}

/******************************************************************************/
/* Connection Threads                                                         */
/******************************************************************************/

ConnectionSendThread::ConnectionSendThread(unsigned int max_packet_size,
	float timeout) :
	Thread("ConnectionSend"),
	m_max_packet_size(max_packet_size),
	m_timeout(timeout),
	m_max_data_packets_per_iteration(g_settings->getU16("max_packets_per_iteration"))
{
}

void *ConnectionSendThread::run()
{
	assert(m_connection);

	LOG(dout_con << m_connection->getDesc()
		<< "ConnectionSend thread started" << std::endl);

	u64 curtime = porting::getTimeMs();
	u64 lasttime = curtime;

	PROFILE(std::stringstream ThreadIdentifier);
	PROFILE(ThreadIdentifier << "ConnectionSend: [" << m_connection->getDesc() << "]");

	/* if stop is requested don't stop immediately but try to send all        */
	/* packets first */
	while (!stopRequested() || packetsQueued()) {
		BEGIN_DEBUG_EXCEPTION_HANDLER
		PROFILE(ScopeProfiler sp(g_profiler, ThreadIdentifier.str(), SPT_AVG));

		m_iteration_packets_avaialble = m_max_data_packets_per_iteration;

		/* wait for trigger or timeout */
		m_send_sleep_semaphore.wait(50);

		/* remove all triggers */
		while (m_send_sleep_semaphore.wait(0)) {
		}

		lasttime = curtime;
		curtime = porting::getTimeMs();
		float dtime = CALC_DTIME(lasttime, curtime);

		/* first do all the reliable stuff */
		runTimeouts(dtime);

		/* translate commands to packets */
		ConnectionCommand c = m_connection->m_command_queue.pop_frontNoEx(0);
		while (c.type != CONNCMD_NONE) {
			if (c.reliable)
				processReliableCommand(c);
			else
				processNonReliableCommand(c);

			c = m_connection->m_command_queue.pop_frontNoEx(0);
		}

		/* send non reliable packets */
		sendPackets(dtime);

		END_DEBUG_EXCEPTION_HANDLER
	}

	PROFILE(g_profiler->remove(ThreadIdentifier.str()));
	return NULL;
}

void ConnectionSendThread::Trigger()
{
	m_send_sleep_semaphore.post();
}

bool ConnectionSendThread::packetsQueued()
{
	std::list<u16> peerIds = m_connection->getPeerIDs();

	if (!m_outgoing_queue.empty() && !peerIds.empty())
		return true;

	for (u16 peerId : peerIds) {
		PeerHelper peer = m_connection->getPeerNoEx(peerId);

		if (!peer)
			continue;

		if (dynamic_cast<UDPPeer *>(&peer) == 0)
			continue;

		for (Channel &channel : (dynamic_cast<UDPPeer *>(&peer))->channels) {
			if (!channel.queued_commands.empty()) {
				return true;
			}
		}
	}


	return false;
}

void ConnectionSendThread::runTimeouts(float dtime)
{
	std::list<u16> timeouted_peers;
	std::list<u16> peerIds = m_connection->getPeerIDs();

	for (u16 &peerId : peerIds) {
		PeerHelper peer = m_connection->getPeerNoEx(peerId);

		if (!peer)
			continue;

		UDPPeer *udpPeer = dynamic_cast<UDPPeer *>(&peer);
		if (!udpPeer)
			continue;

		PROFILE(std::stringstream peerIdentifier);
		PROFILE(peerIdentifier << "runTimeouts[" << m_connection->getDesc()
			<< ";" << peerId << ";RELIABLE]");
		PROFILE(ScopeProfiler
		peerprofiler(g_profiler, peerIdentifier.str(), SPT_AVG));

		SharedBuffer<u8> data(2); // data for sending ping, required here because of goto

		/*
			Check peer timeout
		*/
		if (peer->isTimedOut(m_timeout)) {
			infostream << m_connection->getDesc()
				<< "RunTimeouts(): Peer " << peer->id
				<< " has timed out."
				<< " (source=peer->timeout_counter)"
				<< std::endl;
			// Add peer to the list
			timeouted_peers.push_back(peer->id);
			// Don't bother going through the buffers of this one
			continue;
		}

		float resend_timeout = udpPeer->getResendTimeout();
		bool retry_count_exceeded = false;
		for (Channel &channel : udpPeer->channels) {
			std::list<BufferedPacket> timed_outs;

			if (udpPeer->getLegacyPeer())
				channel.setWindowSize(WINDOW_SIZE);

			// Remove timed out incomplete unreliable split packets
			channel.incoming_splits.removeUnreliableTimedOuts(dtime, m_timeout);

			// Increment reliable packet times
			channel.outgoing_reliables_sent.incrementTimeouts(dtime);

			unsigned int numpeers = m_connection->m_peers.size();

			if (numpeers == 0)
				return;

			// Re-send timed out outgoing reliables
			timed_outs = channel.outgoing_reliables_sent.getTimedOuts(resend_timeout,
				(m_max_data_packets_per_iteration / numpeers));

			channel.UpdatePacketLossCounter(timed_outs.size());
			g_profiler->graphAdd("packets_lost", timed_outs.size());

			m_iteration_packets_avaialble -= timed_outs.size();

			for (std::list<BufferedPacket>::iterator k = timed_outs.begin();
				k != timed_outs.end(); ++k) {
				u16 peer_id = readPeerId(*(k->data));
				u8 channelnum = readChannel(*(k->data));
				u16 seqnum = readU16(&(k->data[BASE_HEADER_SIZE + 1]));

				channel.UpdateBytesLost(k->data.getSize());
				k->resend_count++;

				if (k->resend_count > MAX_RELIABLE_RETRY) {
					retry_count_exceeded = true;
					timeouted_peers.push_back(peer->id);
					/* no need to check additional packets if a single one did timeout*/
					break;
				}

				LOG(derr_con << m_connection->getDesc()
					<< "RE-SENDING timed-out RELIABLE to "
					<< k->address.serializeString()
					<< "(t/o=" << resend_timeout << "): "
					<< "from_peer_id=" << peer_id
					<< ", channel=" << ((int) channelnum & 0xff)
					<< ", seqnum=" << seqnum
					<< std::endl);

				rawSend(*k);

				// do not handle rtt here as we can't decide if this packet was
				// lost or really takes more time to transmit
			}

			if (retry_count_exceeded) {
				break; /* no need to check other channels if we already did timeout */
			}

			channel.UpdateTimers(dtime, udpPeer->getLegacyPeer());
		}

		/* skip to next peer if we did timeout */
		if (retry_count_exceeded)
			continue;

		/* send ping if necessary */
		if (udpPeer->Ping(dtime, data)) {
			LOG(dout_con << m_connection->getDesc()
				<< "Sending ping for peer_id: " << udpPeer->id << std::endl);
			/* this may fail if there ain't a sequence number left */
			if (!rawSendAsPacket(udpPeer->id, 0, data, true)) {
				//retrigger with reduced ping interval
				udpPeer->Ping(4.0, data);
			}
		}

		udpPeer->RunCommandQueues(m_max_packet_size,
			m_max_commands_per_iteration,
			m_max_packets_requeued);
	}

	// Remove timed out peers
	for (u16 timeouted_peer : timeouted_peers) {
		LOG(derr_con << m_connection->getDesc()
			<< "RunTimeouts(): Removing peer " << timeouted_peer << std::endl);
		m_connection->deletePeer(timeouted_peer, true);
	}
}

void ConnectionSendThread::rawSend(const BufferedPacket &packet)
{
	try {
		m_connection->m_udpSocket.Send(packet.address, *packet.data,
			packet.data.getSize());
		LOG(dout_con << m_connection->getDesc()
			<< " rawSend: " << packet.data.getSize()
			<< " bytes sent" << std::endl);
	} catch (SendFailedException &e) {
		LOG(derr_con << m_connection->getDesc()
			<< "Connection::rawSend(): SendFailedException: "
			<< packet.address.serializeString() << std::endl);
	}
}

void ConnectionSendThread::sendAsPacketReliable(BufferedPacket &p, Channel *channel)
{
	try {
		p.absolute_send_time = porting::getTimeMs();
		// Buffer the packet
		channel->outgoing_reliables_sent.insert(p,
			(channel->readOutgoingSequenceNumber() - MAX_RELIABLE_WINDOW_SIZE)
				% (MAX_RELIABLE_WINDOW_SIZE + 1));
	}
	catch (AlreadyExistsException &e) {
		LOG(derr_con << m_connection->getDesc()
			<< "WARNING: Going to send a reliable packet"
			<< " in outgoing buffer" << std::endl);
	}

	// Send the packet
	rawSend(p);
}

bool ConnectionSendThread::rawSendAsPacket(u16 peer_id, u8 channelnum,
	const SharedBuffer<u8> &data, bool reliable)
{
	PeerHelper peer = m_connection->getPeerNoEx(peer_id);
	if (!peer) {
		LOG(dout_con << m_connection->getDesc()
			<< " INFO: dropped packet for non existent peer_id: "
			<< peer_id << std::endl);
		FATAL_ERROR_IF(!reliable,
			"Trying to send raw packet reliable but no peer found!");
		return false;
	}
	Channel *channel = &(dynamic_cast<UDPPeer *>(&peer)->channels[channelnum]);

	if (reliable) {
		bool have_sequence_number_for_raw_packet = true;
		u16 seqnum =
			channel->getOutgoingSequenceNumber(have_sequence_number_for_raw_packet);

		if (!have_sequence_number_for_raw_packet)
			return false;

		SharedBuffer<u8> reliable = makeReliablePacket(data, seqnum);
		Address peer_address;
		peer->getAddress(MTP_MINETEST_RELIABLE_UDP, peer_address);

		// Add base headers and make a packet
		BufferedPacket p = con::makePacket(peer_address, reliable,
			m_connection->GetProtocolID(), m_connection->GetPeerID(),
			channelnum);

		// first check if our send window is already maxed out
		if (channel->outgoing_reliables_sent.size()
			< channel->getWindowSize()) {
			LOG(dout_con << m_connection->getDesc()
				<< " INFO: sending a reliable packet to peer_id " << peer_id
				<< " channel: " << channelnum
				<< " seqnum: " << seqnum << std::endl);
			sendAsPacketReliable(p, channel);
			return true;
		}

		LOG(dout_con << m_connection->getDesc()
			<< " INFO: queueing reliable packet for peer_id: " << peer_id
			<< " channel: " << channelnum
			<< " seqnum: " << seqnum << std::endl);
		channel->queued_reliables.push(p);
		return false;
	}

	Address peer_address;
	if (peer->getAddress(MTP_UDP, peer_address)) {
		// Add base headers and make a packet
		BufferedPacket p = con::makePacket(peer_address, data,
			m_connection->GetProtocolID(), m_connection->GetPeerID(),
			channelnum);

		// Send the packet
		rawSend(p);
		return true;
	}

	LOG(dout_con << m_connection->getDesc()
		<< " INFO: dropped unreliable packet for peer_id: " << peer_id
		<< " because of (yet) missing udp address" << std::endl);
	return false;
}

void ConnectionSendThread::processReliableCommand(ConnectionCommand &c)
{
	assert(c.reliable);  // Pre-condition

	switch (c.type) {
		case CONNCMD_NONE:
			LOG(dout_con << m_connection->getDesc()
				<< "UDP processing reliable CONNCMD_NONE" << std::endl);
			return;

		case CONNCMD_SEND:
			LOG(dout_con << m_connection->getDesc()
				<< "UDP processing reliable CONNCMD_SEND" << std::endl);
			sendReliable(c);
			return;

		case CONNCMD_SEND_TO_ALL:
			LOG(dout_con << m_connection->getDesc()
				<< "UDP processing CONNCMD_SEND_TO_ALL" << std::endl);
			sendToAllReliable(c);
			return;

		case CONCMD_CREATE_PEER:
			LOG(dout_con << m_connection->getDesc()
				<< "UDP processing reliable CONCMD_CREATE_PEER" << std::endl);
			if (!rawSendAsPacket(c.peer_id, c.channelnum, c.data, c.reliable)) {
				/* put to queue if we couldn't send it immediately */
				sendReliable(c);
			}
			return;

		case CONCMD_DISABLE_LEGACY:
			LOG(dout_con << m_connection->getDesc()
				<< "UDP processing reliable CONCMD_DISABLE_LEGACY" << std::endl);
			if (!rawSendAsPacket(c.peer_id, c.channelnum, c.data, c.reliable)) {
				/* put to queue if we couldn't send it immediately */
				sendReliable(c);
			}
			return;

		case CONNCMD_SERVE:
		case CONNCMD_CONNECT:
		case CONNCMD_DISCONNECT:
		case CONCMD_ACK:
			FATAL_ERROR("Got command that shouldn't be reliable as reliable command");
		default:
			LOG(dout_con << m_connection->getDesc()
				<< " Invalid reliable command type: " << c.type << std::endl);
	}
}


void ConnectionSendThread::processNonReliableCommand(ConnectionCommand &c)
{
	assert(!c.reliable); // Pre-condition

	switch (c.type) {
		case CONNCMD_NONE:
			LOG(dout_con << m_connection->getDesc()
				<< " UDP processing CONNCMD_NONE" << std::endl);
			return;
		case CONNCMD_SERVE:
			LOG(dout_con << m_connection->getDesc()
				<< " UDP processing CONNCMD_SERVE port="
				<< c.address.serializeString() << std::endl);
			serve(c.address);
			return;
		case CONNCMD_CONNECT:
			LOG(dout_con << m_connection->getDesc()
				<< " UDP processing CONNCMD_CONNECT" << std::endl);
			connect(c.address);
			return;
		case CONNCMD_DISCONNECT:
			LOG(dout_con << m_connection->getDesc()
				<< " UDP processing CONNCMD_DISCONNECT" << std::endl);
			disconnect();
			return;
		case CONNCMD_DISCONNECT_PEER:
			LOG(dout_con << m_connection->getDesc()
				<< " UDP processing CONNCMD_DISCONNECT_PEER" << std::endl);
			disconnect_peer(c.peer_id);
			return;
		case CONNCMD_SEND:
			LOG(dout_con << m_connection->getDesc()
				<< " UDP processing CONNCMD_SEND" << std::endl);
			send(c.peer_id, c.channelnum, c.data);
			return;
		case CONNCMD_SEND_TO_ALL:
			LOG(dout_con << m_connection->getDesc()
				<< " UDP processing CONNCMD_SEND_TO_ALL" << std::endl);
			sendToAll(c.channelnum, c.data);
			return;
		case CONCMD_ACK:
			LOG(dout_con << m_connection->getDesc()
				<< " UDP processing CONCMD_ACK" << std::endl);
			sendAsPacket(c.peer_id, c.channelnum, c.data, true);
			return;
		case CONCMD_CREATE_PEER:
			FATAL_ERROR("Got command that should be reliable as unreliable command");
		default:
			LOG(dout_con << m_connection->getDesc()
				<< " Invalid command type: " << c.type << std::endl);
	}
}

void ConnectionSendThread::serve(Address bind_address)
{
	LOG(dout_con << m_connection->getDesc()
		<< "UDP serving at port " << bind_address.serializeString() << std::endl);
	try {
		m_connection->m_udpSocket.Bind(bind_address);
		m_connection->SetPeerID(PEER_ID_SERVER);
	}
	catch (SocketException &e) {
		// Create event
		ConnectionEvent ce;
		ce.bindFailed();
		m_connection->putEvent(ce);
	}
}

void ConnectionSendThread::connect(Address address)
{
	LOG(dout_con << m_connection->getDesc() << " connecting to "
		<< address.serializeString()
		<< ":" << address.getPort() << std::endl);

	UDPPeer *peer = m_connection->createServerPeer(address);

	// Create event
	ConnectionEvent e;
	e.peerAdded(peer->id, peer->address);
	m_connection->putEvent(e);

	Address bind_addr;

	if (address.isIPv6())
		bind_addr.setAddress((IPv6AddressBytes *) NULL);
	else
		bind_addr.setAddress(0, 0, 0, 0);

	m_connection->m_udpSocket.Bind(bind_addr);

	// Send a dummy packet to server with peer_id = PEER_ID_INEXISTENT
	m_connection->SetPeerID(PEER_ID_INEXISTENT);
	NetworkPacket pkt(0, 0);
	m_connection->Send(PEER_ID_SERVER, 0, &pkt, true);
}

void ConnectionSendThread::disconnect()
{
	LOG(dout_con << m_connection->getDesc() << " disconnecting" << std::endl);

	// Create and send DISCO packet
	SharedBuffer<u8> data(2);
	writeU8(&data[0], PACKET_TYPE_CONTROL);
	writeU8(&data[1], CONTROLTYPE_DISCO);


	// Send to all
	std::list<u16> peerids = m_connection->getPeerIDs();

	for (u16 peerid : peerids) {
		sendAsPacket(peerid, 0, data, false);
	}
}

void ConnectionSendThread::disconnect_peer(u16 peer_id)
{
	LOG(dout_con << m_connection->getDesc() << " disconnecting peer" << std::endl);

	// Create and send DISCO packet
	SharedBuffer<u8> data(2);
	writeU8(&data[0], PACKET_TYPE_CONTROL);
	writeU8(&data[1], CONTROLTYPE_DISCO);
	sendAsPacket(peer_id, 0, data, false);

	PeerHelper peer = m_connection->getPeerNoEx(peer_id);

	if (!peer)
		return;

	if (dynamic_cast<UDPPeer *>(&peer) == 0) {
		return;
	}

	dynamic_cast<UDPPeer *>(&peer)->m_pending_disconnect = true;
}

void ConnectionSendThread::send(u16 peer_id, u8 channelnum,
	SharedBuffer<u8> data)
{
	assert(channelnum < CHANNEL_COUNT); // Pre-condition

	PeerHelper peer = m_connection->getPeerNoEx(peer_id);
	if (!peer) {
		LOG(dout_con << m_connection->getDesc() << " peer: peer_id=" << peer_id
			<< ">>>NOT<<< found on sending packet"
			<< ", channel " << (channelnum % 0xFF)
			<< ", size: " << data.getSize() << std::endl);
		return;
	}

	LOG(dout_con << m_connection->getDesc() << " sending to peer_id=" << peer_id
		<< ", channel " << (channelnum % 0xFF)
		<< ", size: " << data.getSize() << std::endl);

	u16 split_sequence_number = peer->getNextSplitSequenceNumber(channelnum);

	u32 chunksize_max = m_max_packet_size - BASE_HEADER_SIZE;
	std::list<SharedBuffer<u8>> originals;

	makeAutoSplitPacket(data, chunksize_max, split_sequence_number, &originals);

	peer->setNextSplitSequenceNumber(channelnum, split_sequence_number);

	for (const SharedBuffer<u8> &original : originals) {
		sendAsPacket(peer_id, channelnum, original);
	}
}

void ConnectionSendThread::sendReliable(ConnectionCommand &c)
{
	PeerHelper peer = m_connection->getPeerNoEx(c.peer_id);
	if (!peer)
		return;

	peer->PutReliableSendCommand(c, m_max_packet_size);
}

void ConnectionSendThread::sendToAll(u8 channelnum, SharedBuffer<u8> data)
{
	std::list<u16> peerids = m_connection->getPeerIDs();

	for (u16 peerid : peerids) {
		send(peerid, channelnum, data);
	}
}

void ConnectionSendThread::sendToAllReliable(ConnectionCommand &c)
{
	std::list<u16> peerids = m_connection->getPeerIDs();

	for (u16 peerid : peerids) {
		PeerHelper peer = m_connection->getPeerNoEx(peerid);

		if (!peer)
			continue;

		peer->PutReliableSendCommand(c, m_max_packet_size);
	}
}

void ConnectionSendThread::sendPackets(float dtime)
{
	std::list<u16> peerIds = m_connection->getPeerIDs();
	std::list<u16> pendingDisconnect;
	std::map<u16, bool> pending_unreliable;

	for (u16 peerId : peerIds) {
		PeerHelper peer = m_connection->getPeerNoEx(peerId);
		//peer may have been removed
		if (!peer) {
			LOG(dout_con << m_connection->getDesc() << " Peer not found: peer_id="
				<< peerId
				<< std::endl);
			continue;
		}
		peer->m_increment_packets_remaining =
			m_iteration_packets_avaialble / m_connection->m_peers.size();

		UDPPeer *udpPeer = dynamic_cast<UDPPeer *>(&peer);

		if (!udpPeer) {
			continue;
		}

		if (udpPeer->m_pending_disconnect) {
			pendingDisconnect.push_back(peerId);
		}

		PROFILE(std::stringstream
		peerIdentifier);
		PROFILE(
			peerIdentifier << "sendPackets[" << m_connection->getDesc() << ";" << peerId
				<< ";RELIABLE]");
		PROFILE(ScopeProfiler
		peerprofiler(g_profiler, peerIdentifier.str(), SPT_AVG));

		LOG(dout_con << m_connection->getDesc()
			<< " Handle per peer queues: peer_id=" << peerId
			<< " packet quota: " << peer->m_increment_packets_remaining << std::endl);

		// first send queued reliable packets for all peers (if possible)
		for (unsigned int i = 0; i < CHANNEL_COUNT; i++) {
			Channel &channel = udpPeer->channels[i];
			u16 next_to_ack = 0;

			channel.outgoing_reliables_sent.getFirstSeqnum(next_to_ack);
			u16 next_to_receive = 0;
			channel.incoming_reliables.getFirstSeqnum(next_to_receive);

			LOG(dout_con << m_connection->getDesc() << "\t channel: "
				<< i << ", peer quota:"
				<< peer->m_increment_packets_remaining
				<< std::endl
				<< "\t\t\treliables on wire: "
				<< channel.outgoing_reliables_sent.size()
				<< ", waiting for ack for " << next_to_ack
				<< std::endl
				<< "\t\t\tincoming_reliables: "
				<< channel.incoming_reliables.size()
				<< ", next reliable packet: "
				<< channel.readNextIncomingSeqNum()
				<< ", next queued: " << next_to_receive
				<< std::endl
				<< "\t\t\treliables queued : "
				<< channel.queued_reliables.size()
				<< std::endl
				<< "\t\t\tqueued commands  : "
				<< channel.queued_commands.size()
				<< std::endl);

			while (!channel.queued_reliables.empty() &&
					channel.outgoing_reliables_sent.size()
					< channel.getWindowSize() &&
					peer->m_increment_packets_remaining > 0) {
				BufferedPacket p = channel.queued_reliables.front();
				channel.queued_reliables.pop();
				LOG(dout_con << m_connection->getDesc()
					<< " INFO: sending a queued reliable packet "
					<< " channel: " << i
					<< ", seqnum: " << readU16(&p.data[BASE_HEADER_SIZE + 1])
					<< std::endl);
				sendAsPacketReliable(p, &channel);
				peer->m_increment_packets_remaining--;
			}
		}
	}

	if (!m_outgoing_queue.empty()) {
		LOG(dout_con << m_connection->getDesc()
			<< " Handle non reliable queue ("
			<< m_outgoing_queue.size() << " pkts)" << std::endl);
	}

	unsigned int initial_queuesize = m_outgoing_queue.size();
	/* send non reliable packets*/
	for (unsigned int i = 0; i < initial_queuesize; i++) {
		OutgoingPacket packet = m_outgoing_queue.front();
		m_outgoing_queue.pop();

		if (packet.reliable)
			continue;

		PeerHelper peer = m_connection->getPeerNoEx(packet.peer_id);
		if (!peer) {
			LOG(dout_con << m_connection->getDesc()
				<< " Outgoing queue: peer_id=" << packet.peer_id
				<< ">>>NOT<<< found on sending packet"
				<< ", channel " << (packet.channelnum % 0xFF)
				<< ", size: " << packet.data.getSize() << std::endl);
			continue;
		}

		/* send acks immediately */
		if (packet.ack) {
			rawSendAsPacket(packet.peer_id, packet.channelnum,
				packet.data, packet.reliable);
			peer->m_increment_packets_remaining =
				MYMIN(0, peer->m_increment_packets_remaining--);
		} else if (
			(peer->m_increment_packets_remaining > 0) ||
				(stopRequested())) {
			rawSendAsPacket(packet.peer_id, packet.channelnum,
				packet.data, packet.reliable);
			peer->m_increment_packets_remaining--;
		} else {
			m_outgoing_queue.push(packet);
			pending_unreliable[packet.peer_id] = true;
		}
	}

	for (u16 peerId : pendingDisconnect) {
		if (!pending_unreliable[peerId]) {
			m_connection->deletePeer(peerId, false);
		}
	}
}

void ConnectionSendThread::sendAsPacket(u16 peer_id, u8 channelnum,
	SharedBuffer<u8> data, bool ack)
{
	OutgoingPacket packet(peer_id, channelnum, data, false, ack);
	m_outgoing_queue.push(packet);
}

ConnectionReceiveThread::ConnectionReceiveThread(unsigned int max_packet_size) :
	Thread("ConnectionReceive")
{
}

void *ConnectionReceiveThread::run()
{
	assert(m_connection);

	LOG(dout_con << m_connection->getDesc()
		<< "ConnectionReceive thread started" << std::endl);

	PROFILE(std::stringstream
	ThreadIdentifier);
	PROFILE(ThreadIdentifier << "ConnectionReceive: [" << m_connection->getDesc() << "]");

#ifdef DEBUG_CONNECTION_KBPS
	u64 curtime = porting::getTimeMs();
	u64 lasttime = curtime;
	float debug_print_timer = 0.0;
#endif

	while (!stopRequested()) {
		BEGIN_DEBUG_EXCEPTION_HANDLER
		PROFILE(ScopeProfiler
		sp(g_profiler, ThreadIdentifier.str(), SPT_AVG));

#ifdef DEBUG_CONNECTION_KBPS
		lasttime = curtime;
		curtime = porting::getTimeMs();
		float dtime = CALC_DTIME(lasttime,curtime);
#endif

		/* receive packets */
		receive();

#ifdef DEBUG_CONNECTION_KBPS
		debug_print_timer += dtime;
		if (debug_print_timer > 20.0) {
			debug_print_timer -= 20.0;

			std::list<u16> peerids = m_connection->getPeerIDs();

			for (std::list<u16>::iterator i = peerids.begin();
					i != peerids.end();
					i++)
			{
				PeerHelper peer = m_connection->getPeerNoEx(*i);
				if (!peer)
					continue;

				float peer_current = 0.0;
				float peer_loss = 0.0;
				float avg_rate = 0.0;
				float avg_loss = 0.0;

				for(u16 j=0; j<CHANNEL_COUNT; j++)
				{
					peer_current +=peer->channels[j].getCurrentDownloadRateKB();
					peer_loss += peer->channels[j].getCurrentLossRateKB();
					avg_rate += peer->channels[j].getAvgDownloadRateKB();
					avg_loss += peer->channels[j].getAvgLossRateKB();
				}

				std::stringstream output;
				output << std::fixed << std::setprecision(1);
				output << "OUT to Peer " << *i << " RATES (good / loss) " << std::endl;
				output << "\tcurrent (sum): " << peer_current << "kb/s "<< peer_loss << "kb/s" << std::endl;
				output << "\taverage (sum): " << avg_rate << "kb/s "<< avg_loss << "kb/s" << std::endl;
				output << std::setfill(' ');
				for(u16 j=0; j<CHANNEL_COUNT; j++)
				{
					output << "\tcha " << j << ":"
						<< " CUR: " << std::setw(6) << peer->channels[j].getCurrentDownloadRateKB() <<"kb/s"
						<< " AVG: " << std::setw(6) << peer->channels[j].getAvgDownloadRateKB() <<"kb/s"
						<< " MAX: " << std::setw(6) << peer->channels[j].getMaxDownloadRateKB() <<"kb/s"
						<< " /"
						<< " CUR: " << std::setw(6) << peer->channels[j].getCurrentLossRateKB() <<"kb/s"
						<< " AVG: " << std::setw(6) << peer->channels[j].getAvgLossRateKB() <<"kb/s"
						<< " MAX: " << std::setw(6) << peer->channels[j].getMaxLossRateKB() <<"kb/s"
						<< " / WS: " << peer->channels[j].getWindowSize()
						<< std::endl;
				}

				fprintf(stderr,"%s\n",output.str().c_str());
			}
		}
#endif
		END_DEBUG_EXCEPTION_HANDLER
	}

	PROFILE(g_profiler->remove(ThreadIdentifier.str()));
	return NULL;
}

// Receive packets from the network and buffers and create ConnectionEvents
void ConnectionReceiveThread::receive()
{
	// use IPv6 minimum allowed MTU as receive buffer size as this is
	// theoretical reliable upper boundary of a udp packet for all IPv6 enabled
	// infrastructure
	unsigned int packet_maxsize = 1500;
	SharedBuffer<u8> packetdata(packet_maxsize);

	bool packet_queued = true;

	unsigned int loop_count = 0;

	/* first of all read packets from socket */
	/* check for incoming data available */
	while ((loop_count < 10) &&
		(m_connection->m_udpSocket.WaitData(50))) {
		loop_count++;
		try {
			if (packet_queued) {
				bool data_left = true;
				u16 peer_id;
				SharedBuffer<u8> resultdata;
				while (data_left) {
					try {
						data_left = getFromBuffers(peer_id, resultdata);
						if (data_left) {
							ConnectionEvent e;
							e.dataReceived(peer_id, resultdata);
							m_connection->putEvent(e);
						}
					}
					catch (ProcessedSilentlyException &e) {
						/* try reading again */
					}
				}
				packet_queued = false;
			}

			Address sender;
			s32 received_size = m_connection->m_udpSocket.Receive(sender, *packetdata,
				packet_maxsize);

			if ((received_size < BASE_HEADER_SIZE) ||
				(readU32(&packetdata[0]) != m_connection->GetProtocolID())) {
				LOG(derr_con << m_connection->getDesc()
					<< "Receive(): Invalid incoming packet, "
					<< "size: " << received_size
					<< ", protocol: "
					<< ((received_size >= 4) ? readU32(&packetdata[0]) : -1)
					<< std::endl);
				continue;
			}

			u16 peer_id = readPeerId(*packetdata);
			u8 channelnum = readChannel(*packetdata);

			if (channelnum > CHANNEL_COUNT - 1) {
				LOG(derr_con << m_connection->getDesc()
					<< "Receive(): Invalid channel " << channelnum << std::endl);
				throw InvalidIncomingDataException("Channel doesn't exist");
			}

			/* Try to identify peer by sender address (may happen on join) */
			if (peer_id == PEER_ID_INEXISTENT) {
				peer_id = m_connection->lookupPeer(sender);
				// We do not have to remind the peer of its
				// peer id as the CONTROLTYPE_SET_PEER_ID
				// command was sent reliably.
			}

			/* The peer was not found in our lists. Add it. */
			if (peer_id == PEER_ID_INEXISTENT) {
				peer_id = m_connection->createPeer(sender, MTP_MINETEST_RELIABLE_UDP, 0);
			}

			PeerHelper peer = m_connection->getPeerNoEx(peer_id);

			if (!peer) {
				LOG(dout_con << m_connection->getDesc()
					<< " got packet from unknown peer_id: "
					<< peer_id << " Ignoring." << std::endl);
				continue;
			}

			// Validate peer address

			Address peer_address;

			if (peer->getAddress(MTP_UDP, peer_address)) {
				if (peer_address != sender) {
					LOG(derr_con << m_connection->getDesc()
						<< m_connection->getDesc()
						<< " Peer " << peer_id << " sending from different address."
						" Ignoring." << std::endl);
					continue;
				}
			} else {

				bool invalid_address = true;
				if (invalid_address) {
					LOG(derr_con << m_connection->getDesc()
						<< m_connection->getDesc()
						<< " Peer " << peer_id << " unknown."
						" Ignoring." << std::endl);
					continue;
				}
			}

			peer->ResetTimeout();

			Channel *channel = 0;

			if (dynamic_cast<UDPPeer *>(&peer) != 0) {
				channel = &(dynamic_cast<UDPPeer *>(&peer)->channels[channelnum]);
			}

			if (channel != 0) {
				channel->UpdateBytesReceived(received_size);
			}

			// Throw the received packet to channel->processPacket()

			// Make a new SharedBuffer from the data without the base headers
			SharedBuffer<u8> strippeddata(received_size - BASE_HEADER_SIZE);
			memcpy(*strippeddata, &packetdata[BASE_HEADER_SIZE],
				strippeddata.getSize());

			try {
				// Process it (the result is some data with no headers made by us)
				SharedBuffer<u8> resultdata = processPacket
					(channel, strippeddata, peer_id, channelnum, false);

				LOG(dout_con << m_connection->getDesc()
					<< " ProcessPacket from peer_id: " << peer_id
					<< ",channel: " << (channelnum & 0xFF) << ", returned "
					<< resultdata.getSize() << " bytes" << std::endl);

				ConnectionEvent e;
				e.dataReceived(peer_id, resultdata);
				m_connection->putEvent(e);
			}
			catch (ProcessedSilentlyException &e) {
			}
			catch (ProcessedQueued &e) {
				packet_queued = true;
			}
		}
		catch (InvalidIncomingDataException &e) {
		}
		catch (ProcessedSilentlyException &e) {
		}
	}
}

bool ConnectionReceiveThread::getFromBuffers(u16 &peer_id, SharedBuffer<u8> &dst)
{
	std::list<u16> peerids = m_connection->getPeerIDs();

	for (u16 peerid : peerids) {
		PeerHelper peer = m_connection->getPeerNoEx(peerid);
		if (!peer)
			continue;

		if (dynamic_cast<UDPPeer *>(&peer) == 0)
			continue;

		for (Channel &channel : (dynamic_cast<UDPPeer *>(&peer))->channels) {
			if (checkIncomingBuffers(&channel, peer_id, dst)) {
				return true;
			}
		}
	}
	return false;
}

bool ConnectionReceiveThread::checkIncomingBuffers(Channel *channel,
	u16 &peer_id, SharedBuffer<u8> &dst)
{
	u16 firstseqnum = 0;
	if (channel->incoming_reliables.getFirstSeqnum(firstseqnum)) {
		if (firstseqnum == channel->readNextIncomingSeqNum()) {
			BufferedPacket p = channel->incoming_reliables.popFirst();
			peer_id = readPeerId(*p.data);
			u8 channelnum = readChannel(*p.data);
			u16 seqnum = readU16(&p.data[BASE_HEADER_SIZE + 1]);

			LOG(dout_con << m_connection->getDesc()
				<< "UNBUFFERING TYPE_RELIABLE"
				<< " seqnum=" << seqnum
				<< " peer_id=" << peer_id
				<< " channel=" << ((int) channelnum & 0xff)
				<< std::endl);

			channel->incNextIncomingSeqNum();

			u32 headers_size = BASE_HEADER_SIZE + RELIABLE_HEADER_SIZE;
			// Get out the inside packet and re-process it
			SharedBuffer<u8> payload(p.data.getSize() - headers_size);
			memcpy(*payload, &p.data[headers_size], payload.getSize());

			dst = processPacket(channel, payload, peer_id, channelnum, true);
			return true;
		}
	}
	return false;
}

SharedBuffer<u8> ConnectionReceiveThread::processPacket(Channel *channel,
	SharedBuffer<u8> &packetdata, u16 peer_id, u8 channelnum, bool reliable)
{
	PeerHelper peer = m_connection->getPeerNoEx(peer_id);

	if (!peer) {
		errorstream << "Peer not found (possible timeout)" << std::endl;
		throw ProcessedSilentlyException("Peer not found (possible timeout)");
	}

	if (packetdata.getSize() < 1)
		throw InvalidIncomingDataException("packetdata.getSize() < 1");

	u8 type = readU8(&(packetdata[0]));

	if (MAX_UDP_PEERS <= 65535 && peer_id >= MAX_UDP_PEERS) {
		std::string errmsg = "Invalid peer_id=" + itos(peer_id);
		errorstream << errmsg << std::endl;
		throw InvalidIncomingDataException(errmsg.c_str());
	}

	if (type >= PACKET_TYPE_MAX) {
		derr_con << m_connection->getDesc() << "Got invalid type=" << ((int) type & 0xff)
			<< std::endl;
		throw InvalidIncomingDataException("Invalid packet type");
	}

	const PacketTypeHandler &pHandle = packetTypeRouter[type];
	return (this->*pHandle.handler)(channel, packetdata, &peer, channelnum, reliable);
}

const ConnectionReceiveThread::PacketTypeHandler
	ConnectionReceiveThread::packetTypeRouter[PACKET_TYPE_MAX] = {
	{&ConnectionReceiveThread::handlePacketType_Control},
	{&ConnectionReceiveThread::handlePacketType_Original},
	{&ConnectionReceiveThread::handlePacketType_Split},
	{&ConnectionReceiveThread::handlePacketType_Reliable},
};

SharedBuffer<u8> ConnectionReceiveThread::handlePacketType_Control(Channel *channel,
	SharedBuffer<u8> &packetdata, Peer *peer, u8 channelnum, bool reliable)
{
	if (packetdata.getSize() < 2)
		throw InvalidIncomingDataException("packetdata.getSize() < 2");

	u8 controltype = readU8(&(packetdata[1]));

	if (controltype == CONTROLTYPE_ACK) {
		assert(channel != NULL);

		if (packetdata.getSize() < 4) {
			throw InvalidIncomingDataException(
				"packetdata.getSize() < 4 (ACK header size)");
		}

		u16 seqnum = readU16(&packetdata[2]);
		LOG(dout_con << m_connection->getDesc() << " [ CONTROLTYPE_ACK: channelnum="
			<< ((int) channelnum & 0xff) << ", peer_id=" << peer->id << ", seqnum="
			<< seqnum << " ]" << std::endl);

		try {
			BufferedPacket p = channel->outgoing_reliables_sent.popSeqnum(seqnum);

			// only calculate rtt from straight sent packets
			if (p.resend_count == 0) {
				// Get round trip time
				u64 current_time = porting::getTimeMs();

				// a overflow is quite unlikely but as it'd result in major
				// rtt miscalculation we handle it here
				if (current_time > p.absolute_send_time) {
					float rtt = (current_time - p.absolute_send_time) / 1000.0;

					// Let peer calculate stuff according to it
					// (avg_rtt and resend_timeout)
					dynamic_cast<UDPPeer *>(peer)->reportRTT(rtt);
				} else if (p.totaltime > 0) {
					float rtt = p.totaltime;

					// Let peer calculate stuff according to it
					// (avg_rtt and resend_timeout)
					dynamic_cast<UDPPeer *>(peer)->reportRTT(rtt);
				}
			}
			// put bytes for max bandwidth calculation
			channel->UpdateBytesSent(p.data.getSize(), 1);
			if (channel->outgoing_reliables_sent.size() == 0)
				m_connection->TriggerSend();
		} catch (NotFoundException &e) {
			LOG(derr_con << m_connection->getDesc()
				<< "WARNING: ACKed packet not in outgoing queue" << std::endl);
			channel->UpdatePacketTooLateCounter();
		}

		throw ProcessedSilentlyException("Got an ACK");
	} else if (controltype == CONTROLTYPE_SET_PEER_ID) {
		// Got a packet to set our peer id
		if (packetdata.getSize() < 4)
			throw InvalidIncomingDataException
				("packetdata.getSize() < 4 (SET_PEER_ID header size)");
		u16 peer_id_new = readU16(&packetdata[2]);
		LOG(dout_con << m_connection->getDesc() << "Got new peer id: " << peer_id_new
			<< "... " << std::endl);

		if (m_connection->GetPeerID() != PEER_ID_INEXISTENT) {
			LOG(derr_con << m_connection->getDesc()
				<< "WARNING: Not changing existing peer id." << std::endl);
		} else {
			LOG(dout_con << m_connection->getDesc() << "changing own peer id"
				<< std::endl);
			m_connection->SetPeerID(peer_id_new);
		}

		ConnectionCommand cmd;

		SharedBuffer<u8> reply(2);
		writeU8(&reply[0], PACKET_TYPE_CONTROL);
		writeU8(&reply[1], CONTROLTYPE_ENABLE_BIG_SEND_WINDOW);
		cmd.disableLegacy(PEER_ID_SERVER, reply);
		m_connection->putCommand(cmd);

		throw ProcessedSilentlyException("Got a SET_PEER_ID");
	} else if (controltype == CONTROLTYPE_PING) {
		// Just ignore it, the incoming data already reset
		// the timeout counter
		LOG(dout_con << m_connection->getDesc() << "PING" << std::endl);
		throw ProcessedSilentlyException("Got a PING");
	} else if (controltype == CONTROLTYPE_DISCO) {
		// Just ignore it, the incoming data already reset
		// the timeout counter
		LOG(dout_con << m_connection->getDesc() << "DISCO: Removing peer "
			<< peer->id << std::endl);

		if (!m_connection->deletePeer(peer->id, false)) {
			derr_con << m_connection->getDesc() << "DISCO: Peer not found" << std::endl;
		}

		throw ProcessedSilentlyException("Got a DISCO");
	} else if (controltype == CONTROLTYPE_ENABLE_BIG_SEND_WINDOW) {
		dynamic_cast<UDPPeer *>(peer)->setNonLegacyPeer();
		throw ProcessedSilentlyException("Got non legacy control");
	} else {
		LOG(derr_con << m_connection->getDesc()
			<< "INVALID TYPE_CONTROL: invalid controltype="
			<< ((int) controltype & 0xff) << std::endl);
		throw InvalidIncomingDataException("Invalid control type");
	}
}

SharedBuffer<u8> ConnectionReceiveThread::handlePacketType_Original(Channel *channel,
	SharedBuffer<u8> &packetdata, Peer *peer, u8 channelnum, bool reliable)
{
	if (packetdata.getSize() <= ORIGINAL_HEADER_SIZE)
		throw InvalidIncomingDataException
			("packetdata.getSize() <= ORIGINAL_HEADER_SIZE");
	LOG(dout_con << m_connection->getDesc() << "RETURNING TYPE_ORIGINAL to user"
		<< std::endl);
	// Get the inside packet out and return it
	SharedBuffer<u8> payload(packetdata.getSize() - ORIGINAL_HEADER_SIZE);
	memcpy(*payload, &(packetdata[ORIGINAL_HEADER_SIZE]), payload.getSize());
	return payload;
}

SharedBuffer<u8> ConnectionReceiveThread::handlePacketType_Split(Channel *channel,
	SharedBuffer<u8> &packetdata, Peer *peer, u8 channelnum, bool reliable)
{
	Address peer_address;

	if (peer->getAddress(MTP_UDP, peer_address)) {
		// We have to create a packet again for buffering
		// This isn't actually too bad an idea.
		BufferedPacket packet = makePacket(peer_address,
			packetdata,
			m_connection->GetProtocolID(),
			peer->id,
			channelnum);

		// Buffer the packet
		SharedBuffer<u8> data = peer->addSplitPacket(channelnum, packet, reliable);

		if (data.getSize() != 0) {
			LOG(dout_con << m_connection->getDesc()
				<< "RETURNING TYPE_SPLIT: Constructed full data, "
				<< "size=" << data.getSize() << std::endl);
			return data;
		}
		LOG(dout_con << m_connection->getDesc() << "BUFFERED TYPE_SPLIT" << std::endl);
		throw ProcessedSilentlyException("Buffered a split packet chunk");
	}

	// We should never get here.
	FATAL_ERROR("Invalid execution point");
}

SharedBuffer<u8> ConnectionReceiveThread::handlePacketType_Reliable(Channel *channel,
	SharedBuffer<u8> &packetdata, Peer *peer, u8 channelnum, bool reliable)
{
	assert(channel != NULL);

	// Recursive reliable packets not allowed
	if (reliable)
		throw InvalidIncomingDataException("Found nested reliable packets");

	if (packetdata.getSize() < RELIABLE_HEADER_SIZE)
		throw InvalidIncomingDataException("packetdata.getSize() < RELIABLE_HEADER_SIZE");

	u16 seqnum = readU16(&packetdata[1]);
	bool is_future_packet = false;
	bool is_old_packet = false;

	/* packet is within our receive window send ack */
	if (seqnum_in_window(seqnum,
		channel->readNextIncomingSeqNum(), MAX_RELIABLE_WINDOW_SIZE)) {
		m_connection->sendAck(peer->id, channelnum, seqnum);
	} else {
		is_future_packet = seqnum_higher(seqnum, channel->readNextIncomingSeqNum());
		is_old_packet = seqnum_higher(channel->readNextIncomingSeqNum(), seqnum);

		/* packet is not within receive window, don't send ack.           *
		 * if this was a valid packet it's gonna be retransmitted         */
		if (is_future_packet)
			throw ProcessedSilentlyException(
				"Received packet newer then expected, not sending ack");

		/* seems like our ack was lost, send another one for a old packet */
		if (is_old_packet) {
			LOG(dout_con << m_connection->getDesc()
				<< "RE-SENDING ACK: peer_id: " << peer->id
				<< ", channel: " << (channelnum & 0xFF)
				<< ", seqnum: " << seqnum << std::endl;)
			m_connection->sendAck(peer->id, channelnum, seqnum);

			// we already have this packet so this one was on wire at least
			// the current timeout
			// we don't know how long this packet was on wire don't do silly guessing
			// dynamic_cast<UDPPeer*>(&peer)->
			//     reportRTT(dynamic_cast<UDPPeer*>(&peer)->getResendTimeout());

			throw ProcessedSilentlyException("Retransmitting ack for old packet");
		}
	}

	if (seqnum != channel->readNextIncomingSeqNum()) {
		Address peer_address;

		// this is a reliable packet so we have a udp address for sure
		peer->getAddress(MTP_MINETEST_RELIABLE_UDP, peer_address);
		// This one comes later, buffer it.
		// Actually we have to make a packet to buffer one.
		// Well, we have all the ingredients, so just do it.
		BufferedPacket packet = con::makePacket(
			peer_address,
			packetdata,
			m_connection->GetProtocolID(),
			peer->id,
			channelnum);
		try {
			channel->incoming_reliables.insert(packet, channel->readNextIncomingSeqNum());

			LOG(dout_con << m_connection->getDesc()
				<< "BUFFERING, TYPE_RELIABLE peer_id: " << peer->id
				<< ", channel: " << (channelnum & 0xFF)
				<< ", seqnum: " << seqnum << std::endl;)

			throw ProcessedQueued("Buffered future reliable packet");
		} catch (AlreadyExistsException &e) {
		} catch (IncomingDataCorruption &e) {
			ConnectionCommand discon;
			discon.disconnect_peer(peer->id);
			m_connection->putCommand(discon);

			LOG(derr_con << m_connection->getDesc()
				<< "INVALID, TYPE_RELIABLE peer_id: " << peer->id
				<< ", channel: " << (channelnum & 0xFF)
				<< ", seqnum: " << seqnum
				<< "DROPPING CLIENT!" << std::endl;)
		}
	}

	/* we got a packet to process right now */
	LOG(dout_con << m_connection->getDesc()
		<< "RECURSIVE, TYPE_RELIABLE peer_id: " << peer->id
		<< ", channel: " << (channelnum & 0xFF)
		<< ", seqnum: " << seqnum << std::endl;)


	/* check for resend case */
	u16 queued_seqnum = 0;
	if (channel->incoming_reliables.getFirstSeqnum(queued_seqnum)) {
		if (queued_seqnum == seqnum) {
			BufferedPacket queued_packet = channel->incoming_reliables.popFirst();
			/** TODO find a way to verify the new against the old packet */
		}
	}

	channel->incNextIncomingSeqNum();

	// Get out the inside packet and re-process it
	SharedBuffer<u8> payload(packetdata.getSize() - RELIABLE_HEADER_SIZE);
	memcpy(*payload, &packetdata[RELIABLE_HEADER_SIZE], payload.getSize());

	return processPacket(channel, payload, peer->id, channelnum, true);
}

}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-13 06:12:39 +0000