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# Makefile for Irrlicht Examples
# It's usually sufficient to change just the target name and source file list
# and be sure that CXX is set to a valid compiler
SOURCE_FILES = porting.cpp guiMessageMenu.cpp materials.cpp guiTextInputMenu.cpp guiInventoryMenu.cpp irrlichtwrapper.cpp guiPauseMenu.cpp defaultsettings.cpp mapnode.cpp tile.cpp voxel.cpp mapblockobject.cpp inventory.cpp debug.cpp serialization.cpp light.cpp filesys.cpp connection.cpp environment.cpp client.cpp server.cpp socket.cpp mapblock.cpp mapsector.cpp heightmap.cpp map.cpp player.cpp utility.cpp main.cpp test.cpp

DEBUG_TARGET = debugtest
DEBUG_SOURCES = $(addprefix src/, $(SOURCE_FILES))
DEBUG_BUILD_DIR = debugbuild
DEBUG_OBJECTS = $(addprefix $(DEBUG_BUILD_DIR)/, $(SOURCE_FILES:.cpp=.o))

FAST_TARGET = fasttest
FAST_SOURCES = $(addprefix src/, $(SOURCE_FILES))
FAST_BUILD_DIR = fastbuild
FAST_OBJECTS = $(addprefix $(FAST_BUILD_DIR)/, $(SOURCE_FILES:.cpp=.o))

SERVER_TARGET = server
SERVER_SOURCE_FILES = porting.cpp materials.cpp defaultsettings.cpp mapnode.cpp voxel.cpp mapblockobject.cpp inventory.cpp debug.cpp serialization.cpp light.cpp filesys.cpp connection.cpp environment.cpp server.cpp socket.cpp mapblock.cpp mapsector.cpp heightmap.cpp map.cpp player.cpp utility.cpp servermain.cpp test.cpp
SERVER_SOURCES = $(addprefix src/, $(SERVER_SOURCE_FILES))
SERVER_BUILD_DIR = serverbuild
SERVER_OBJECTS = $(addprefix $(SERVER_BUILD_DIR)/, $(SERVER_SOURCE_FILES:.cpp=.o))

IRRLICHTPATH = ../irrlicht/irrlicht-1.7.1
JTHREADPATH = ../jthread/jthread-1.2.1


all: fast

ifeq ($(HOSTTYPE), x86_64)
LIBSELECT=64
endif

debug: CXXFLAGS = -Wall -g -O1
debug: CPPFLAGS = -I$(IRRLICHTPATH)/include -I/usr/X11R6/include -I$(JTHREADPATH)/src -DDEBUG -DRUN_IN_PLACE
debug: LDFLAGS = -L/usr/X11R6/lib$(LIBSELECT) -L$(IRRLICHTPATH)/lib/Linux -L$(JTHREADPATH)/src/.libs -lIrrlicht -lGL -lXxf86vm -lXext -lX11 -ljthread -lz

fast: CXXFLAGS = -O3 -ffast-math -Wall -fomit-frame-pointer -pipe -funroll-loops -mtune=i686
fast: CPPFLAGS = -I$(IRRLICHTPATH)/include -I/usr/X11R6/include -I$(JTHREADPATH)/src -DUNITTEST_DISABLE -DRUN_IN_PLACE
fast: LDFLAGS = -L/usr/X11R6/lib$(LIBSELECT) -L$(IRRLICHTPATH)/lib/Linux -L$(JTHREADPATH)/src/.libs -lIrrlicht -lGL -lXxf86vm -lXext -lX11 -ljthread -lz

server: CXXFLAGS = -O3 -ffast-math -Wall -fomit-frame-pointer -pipe -funroll-loops -mtune=i686
server: CPPFLAGS = -I$(IRRLICHTPATH)/include -I/usr/X11R6/include -I$(JTHREADPATH)/src -DSERVER -DUNITTEST_DISABLE -DRUN_IN_PLACE
server: LDFLAGS = -L$(JTHREADPATH)/src/.libs -ljthread -lz -lpthread

DEBUG_DESTPATH = bin/$(DEBUG_TARGET)
FAST_DESTPATH = bin/$(FAST_TARGET)
SERVER_DESTPATH = bin/$(SERVER_TARGET)

# Build commands

debug: $(DEBUG_BUILD_DIR) $(DEBUG_DESTPATH)
fast: $(FAST_BUILD_DIR) $(FAST_DESTPATH)
server: $(SERVER_BUILD_DIR) $(SERVER_DESTPATH)

$(DEBUG_BUILD_DIR):
	mkdir -p $(DEBUG_BUILD_DIR)
$(FAST_BUILD_DIR):
	mkdir -p $(FAST_BUILD_DIR)
$(SERVER_BUILD_DIR):
	mkdir -p $(SERVER_BUILD_DIR)

$(DEBUG_DESTPATH): $(DEBUG_OBJECTS)
	$(CXX) -o $@ $(DEBUG_OBJECTS) $(LDFLAGS)

$(FAST_DESTPATH): $(FAST_OBJECTS)
	$(CXX) -o $@ $(FAST_OBJECTS) $(LDFLAGS)

$(SERVER_DESTPATH): $(SERVER_OBJECTS)
	$(CXX) -o $@ $(SERVER_OBJECTS) $(LDFLAGS)

$(DEBUG_BUILD_DIR)/%.o: src/%.cpp
	$(CXX) -c -o $@ $< $(CPPFLAGS) $(CXXFLAGS)

$(FAST_BUILD_DIR)/%.o: src/%.cpp
	$(CXX) -c -o $@ $< $(CPPFLAGS) $(CXXFLAGS)

$(SERVER_BUILD_DIR)/%.o: src/%.cpp
	$(CXX) -c -o $@ $< $(CPPFLAGS) $(CXXFLAGS)

clean: clean_debug clean_fast clean_server

clean_debug:
	@$(RM) $(DEBUG_OBJECTS) $(DEBUG_DESTPATH)

clean_fast:
	@$(RM) $(FAST_OBJECTS) $(FAST_DESTPATH)

clean_server:
	@$(RM) $(SERVER_OBJECTS) $(SERVER_DESTPATH)

.PHONY: all all_win32 clean clean_debug clean_win32 clean_fast clean_server
f='#n492'>492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841
/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

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.
*/

#pragma once

#include "irrlichttypes_bloated.h"
#include "peerhandler.h"
#include "socket.h"
#include "constants.h"
#include "util/pointer.h"
#include "util/container.h"
#include "util/thread.h"
#include "util/numeric.h"
#include "networkprotocol.h"
#include <iostream>
#include <fstream>
#include <vector>
#include <map>

class NetworkPacket;

namespace con
{

class ConnectionReceiveThread;
class ConnectionSendThread;

typedef enum MTProtocols {
	MTP_PRIMARY,
	MTP_UDP,
	MTP_MINETEST_RELIABLE_UDP
} MTProtocols;

#define MAX_UDP_PEERS 65535

#define SEQNUM_MAX 65535

inline bool seqnum_higher(u16 totest, u16 base)
{
	if (totest > base)
	{
		if ((totest - base) > (SEQNUM_MAX/2))
			return false;

		return true;
	}

	if ((base - totest) > (SEQNUM_MAX/2))
		return true;

	return false;
}

inline bool seqnum_in_window(u16 seqnum, u16 next,u16 window_size)
{
	u16 window_start = next;
	u16 window_end   = ( next + window_size ) % (SEQNUM_MAX+1);

	if (window_start < window_end) {
		return ((seqnum >= window_start) && (seqnum < window_end));
	}


	return ((seqnum < window_end) || (seqnum >= window_start));
}

static inline float CALC_DTIME(u64 lasttime, u64 curtime)
{
	float value = ( curtime - lasttime) / 1000.0;
	return MYMAX(MYMIN(value,0.1),0.0);
}

struct BufferedPacket
{
	BufferedPacket(u8 *a_data, u32 a_size):
		data(a_data, a_size)
	{}
	BufferedPacket(u32 a_size):
		data(a_size)
	{}
	Buffer<u8> data; // Data of the packet, including headers
	float time = 0.0f; // Seconds from buffering the packet or re-sending
	float totaltime = 0.0f; // Seconds from buffering the packet
	u64 absolute_send_time = -1;
	Address address; // Sender or destination
	unsigned int resend_count = 0;
};

// This adds the base headers to the data and makes a packet out of it
BufferedPacket makePacket(Address &address, const SharedBuffer<u8> &data,
		u32 protocol_id, session_t sender_peer_id, u8 channel);

// Depending on size, make a TYPE_ORIGINAL or TYPE_SPLIT packet
// Increments split_seqnum if a split packet is made
void makeAutoSplitPacket(const SharedBuffer<u8> &data, u32 chunksize_max,
		u16 &split_seqnum, std::list<SharedBuffer<u8>> *list);

// Add the TYPE_RELIABLE header to the data
SharedBuffer<u8> makeReliablePacket(const SharedBuffer<u8> &data, u16 seqnum);

struct IncomingSplitPacket
{
	IncomingSplitPacket(u32 cc, bool r):
		chunk_count(cc), reliable(r) {}

	IncomingSplitPacket() = delete;

	float time = 0.0f; // Seconds from adding
	u32 chunk_count;
	bool reliable; // If true, isn't deleted on timeout

	bool allReceived() const
	{
		return (chunks.size() == chunk_count);
	}
	bool insert(u32 chunk_num, SharedBuffer<u8> &chunkdata);
	SharedBuffer<u8> reassemble();

private:
	// Key is chunk number, value is data without headers
	std::map<u16, SharedBuffer<u8>> chunks;
};

/*
=== NOTES ===

A packet is sent through a channel to a peer with a basic header:
	Header (7 bytes):
	[0] u32 protocol_id
	[4] session_t sender_peer_id
	[6] u8 channel
sender_peer_id:
	Unique to each peer.
	value 0 (PEER_ID_INEXISTENT) is reserved for making new connections
	value 1 (PEER_ID_SERVER) is reserved for server
	these constants are defined in constants.h
channel:
	Channel numbers have no intrinsic meaning. Currently only 0, 1, 2 exist.
*/
#define BASE_HEADER_SIZE 7
#define CHANNEL_COUNT 3
/*
Packet types:

CONTROL: This is a packet used by the protocol.
- When this is processed, nothing is handed to the user.
	Header (2 byte):
	[0] u8 type
	[1] u8 controltype
controltype and data description:
	CONTROLTYPE_ACK
		[2] u16 seqnum
	CONTROLTYPE_SET_PEER_ID
		[2] session_t peer_id_new
	CONTROLTYPE_PING
	- There is no actual reply, but this can be sent in a reliable
	  packet to get a reply
	CONTROLTYPE_DISCO
*/
//#define TYPE_CONTROL 0
#define CONTROLTYPE_ACK 0
#define CONTROLTYPE_SET_PEER_ID 1
#define CONTROLTYPE_PING 2
#define CONTROLTYPE_DISCO 3

/*
ORIGINAL: This is a plain packet with no control and no error
checking at all.
- When this is processed, it is directly handed to the user.
	Header (1 byte):
	[0] u8 type
*/
//#define TYPE_ORIGINAL 1
#define ORIGINAL_HEADER_SIZE 1
/*
SPLIT: These are sequences of packets forming one bigger piece of
data.
- When processed and all the packet_nums 0...packet_count-1 are
  present (this should be buffered), the resulting data shall be
  directly handed to the user.
- If the data fails to come up in a reasonable time, the buffer shall
  be silently discarded.
- These can be sent as-is or atop of a RELIABLE packet stream.
	Header (7 bytes):
	[0] u8 type
	[1] u16 seqnum
	[3] u16 chunk_count
	[5] u16 chunk_num
*/
//#define TYPE_SPLIT 2
/*
RELIABLE: Delivery of all RELIABLE packets shall be forced by ACKs,
and they shall be delivered in the same order as sent. This is done
with a buffer in the receiving and transmitting end.
- When this is processed, the contents of each packet is recursively
  processed as packets.
	Header (3 bytes):
	[0] u8 type
	[1] u16 seqnum

*/
//#define TYPE_RELIABLE 3
#define RELIABLE_HEADER_SIZE 3
#define SEQNUM_INITIAL 65500