/*
 * Copyright (C) Volition, Inc. 1999.  All rights reserved.
 *
 * All source code herein is the property of Volition, Inc. You may not sell 
 * or otherwise commercially exploit the source or things you created based on the 
 * source.
 *
*/




#if defined _WIN32
#include <winsock2.h>
#elif defined SCP_UNIX
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <cerrno>
#endif
#include <cctype>

#include "globalincs/pstypes.h"
#include "network/multiutil.h"
#include "globalincs/linklist.h"
#include "gamesequence/gamesequence.h"
#include "hud/hudmessage.h"
#include "freespace.h"
#include "io/key.h"
#include "io/timer.h"
#include "ship/ship.h"
#include "globalincs/alphacolors.h"
#include "graphics/font.h"
#include "gamesnd/gamesnd.h"
#include "playerman/player.h"
#include "mission/missionparse.h"
#include "missionui/missionshipchoice.h"
#include "network/stand_gui.h"
#include "ship/shipfx.h"
#include "object/object.h"
#include "playerman/managepilot.h"
#include "missionui/missiondebrief.h"
#include "observer/observer.h"
#include "mission/missionmessage.h"
#include "popup/popup.h"
#include "popup/popupdead.h"
#include "hud/hudconfig.h"
#include "menuui/optionsmenu.h"
#include "mission/missionhotkey.h"
#include "mission/missiongoals.h"
#include "ship/afterburner.h"
#include "missionui/chatbox.h"
#include "osapi/osregistry.h"
#include "hud/hudescort.h"
#include "network/multi.h"
#include "cmdline/cmdline.h"
#include "cfile/cfile.h"
#include "cfile/cfilesystem.h"
#include "network/multimsgs.h"
#include "network/multi_xfer.h"
#include "network/multiteamselect.h"
#include "network/multiui.h"
#include "network/multi_kick.h"
#include "network/multi_data.h"
#include "network/multi_voice.h"
#include "network/multi_team.h"
#include "network/multi_respawn.h"
#include "network/multi_ingame.h"
#include "network/multi_observer.h"
#include "network/multi_pinfo.h"
#include "network/multi_endgame.h"
#include "network/multi_pmsg.h"
#include "network/multi_pause.h"
#include "network/multi_log.h"
#include "network/multi_rate.h"
#include "network/multi_fstracker.h"
#include "parse/parselo.h"
#include "debugconsole/console.h"

extern int ascii_table[];
extern int shifted_ascii_table[];

extern UI_TIMESTAMP Multi_ping_timestamp;

// network object management
ushort Next_ship_signature;										// next permanent network signature to assign to an object
ushort Next_asteroid_signature;									// next signature for an asteroid
ushort Next_non_perm_signature;									// next non-permanent network signature to assign to an object
ushort Next_debris_signature;										// next debris signature
ushort Next_waypoint_signature;									// next waypoint signature

// if a client doesn't receive an update for an object after this many seconds, query server
// as to the objects status.
#define MULTI_CLIENT_OBJ_TIMEOUT		10
#define MAX_SHIPS_PER_QUERY			10


// this function assigns the given object with the given signature.  If the signature is 0, then we choose
// the next signature number from the correct pool.  I thought that it might be desireable
// to not always have to take the next signature on the list.  what_kind is used to assign either a
// permanent or non-permanent signature to an object.  permanent signatures are used for ships, non_permanent
// signatures are used for everything else.
ushort multi_assign_network_signature( int what_kind )
{
	ushort sig;	

	Assertion(what_kind >= MULTI_SIG_SHIP && what_kind <= MULTI_SIG_WAYPOINT, "multi_assign_network_signature was passed an invalid index.");

	// do limit checking on the permanent and non_permanent signatures.  Ships are considered "permanent"
	// as are debris and asteroids since they don't die very often.  It would be vary rare for this
	// value (the permanent signature) to wrap.  For now, this condition is an error condition
	if ( what_kind == MULTI_SIG_SHIP ) {
		if ( Next_ship_signature < SHIP_SIG_MIN ){
			Next_ship_signature = SHIP_SIG_MIN;
		}

		sig = Next_ship_signature++;

		if ( Next_ship_signature == SHIP_SIG_MAX ) {
			Int3();			// get Allender -- signature stuff wrapped.
			Next_ship_signature = SHIP_SIG_MIN;
		}

		// signature stuff for asteroids.
	} else if ( what_kind == MULTI_SIG_ASTEROID ) {
		if ( Next_asteroid_signature < ASTEROID_SIG_MIN ){
			Next_asteroid_signature = ASTEROID_SIG_MIN;
		}

		sig = Next_asteroid_signature++;
		if ( Next_asteroid_signature == ASTEROID_SIG_MAX ) {
			Next_asteroid_signature = ASTEROID_SIG_MIN;
		}

		// signatures for debris
	} else if ( what_kind == MULTI_SIG_DEBRIS ) {
		if ( Next_debris_signature < DEBRIS_SIG_MIN ){
			Next_debris_signature = DEBRIS_SIG_MIN;
		}

		sig = Next_debris_signature++;
		if ( Next_debris_signature == DEBRIS_SIG_MAX ) {
			Next_debris_signature = DEBRIS_SIG_MIN;
		}

		// signature stuff for weapons and other expendable things.
	} else if ( what_kind == MULTI_SIG_NON_PERMANENT ) {
		if ( Next_non_perm_signature < NPERM_SIG_MIN ){
			Next_non_perm_signature = NPERM_SIG_MIN;
		}

		sig = Next_non_perm_signature++;
		if ( (Next_non_perm_signature < NPERM_SIG_MIN) || (Next_non_perm_signature == NPERM_SIG_MAX) ) {
			Next_non_perm_signature = NPERM_SIG_MIN;
		}
	} else if (what_kind == MULTI_SIG_WAYPOINT) {
		if (Next_waypoint_signature < WAYPOINT_SIG_MIN) {
			Next_waypoint_signature = WAYPOINT_SIG_MIN;
		}

		sig = Next_waypoint_signature++;
		if (Next_waypoint_signature == WAYPOINT_SIG_MAX){
			Next_waypoint_signature = WAYPOINT_SIG_MIN;
		}
	} else {
		sig = 0;
	}

	return sig;
}

// this function returns the next network signature that will be used for a newly created object
// what_kind parameter tells us what kind of signature to get -- permanent or non-permanent
ushort multi_get_next_network_signature( int what_kind )
{
	if ( what_kind == MULTI_SIG_SHIP ) {
		if ( Next_ship_signature < SHIP_SIG_MIN )
			Next_ship_signature = SHIP_SIG_MIN;
		return Next_ship_signature;

	} else if ( what_kind == MULTI_SIG_DEBRIS ) {
		if ( Next_debris_signature < DEBRIS_SIG_MIN)
			Next_debris_signature = DEBRIS_SIG_MIN;
		return Next_debris_signature;

	} else if ( what_kind == MULTI_SIG_ASTEROID ) {
		if ( Next_asteroid_signature < ASTEROID_SIG_MIN )
			Next_asteroid_signature = ASTEROID_SIG_MIN;
		return Next_asteroid_signature;

	} else if ( what_kind == MULTI_SIG_WAYPOINT ) {
		if ( Next_waypoint_signature < WAYPOINT_SIG_MIN )
			Next_waypoint_signature = WAYPOINT_SIG_MIN;
		return Next_waypoint_signature;

	} else if ( what_kind == MULTI_SIG_NON_PERMANENT ) {
		if ( Next_non_perm_signature < NPERM_SIG_MIN )
			Next_non_perm_signature = NPERM_SIG_MIN;
		return Next_non_perm_signature;

	} else {
		Int3();			// get allender
		return 0;
	}
}

// this routine sets the network signature to the given value.  Should be called from client only
// and is used mainly for firing weapons.  what_kind tells us permanent or non-permanent signature
void multi_set_network_signature( ushort signature, int what_kind )
{
	Assertion(signature != 0, "Invalid net signature of 0 requested in multi_set_network_signature().");
	Assertion(what_kind > 0, "Invalid net signature type of value %d requested in multi_set_network_signature().", what_kind);  // get Allender
	Assertion(what_kind < 6, "Invalid net signature type of value %d requested in multi_set_network_signature().", what_kind);

	if ( what_kind == MULTI_SIG_SHIP ) {
		Assert( (signature >= SHIP_SIG_MIN) && (signature <= SHIP_SIG_MAX) );
		Next_ship_signature = signature;
	} else if ( what_kind == MULTI_SIG_DEBRIS ) {
		Assert( (signature >= DEBRIS_SIG_MIN) && (signature <= DEBRIS_SIG_MAX) );
		Next_debris_signature = signature;
	} else if ( what_kind == MULTI_SIG_ASTEROID ) {
		Assert( (signature >= ASTEROID_SIG_MIN) && (signature <= ASTEROID_SIG_MAX) );
		Next_asteroid_signature = signature;
	} else if ( what_kind == MULTI_SIG_WAYPOINT ) {
		Assert( (signature >= WAYPOINT_SIG_MIN) && (signature <= WAYPOINT_SIG_MAX) );
		Next_waypoint_signature = signature;
	} else if (what_kind == MULTI_SIG_NON_PERMANENT) {
		// Cyborg17 - spawn weapons can set this past the max and overflow the short
		if (signature >= NPERM_SIG_MIN) {
			Next_non_perm_signature = signature;
		// so if they did, just add it to the minimum, because that's where we need to be, anyway.
		} else {
			Next_non_perm_signature = NPERM_SIG_MIN + signature;
			// and if they somehow wrap twice throw an assert, because that will definitely cause undesired behavior.
			Assertion(Next_non_perm_signature >= NPERM_SIG_MIN,"Somehow the non permanent signatures in multi_set_network_signature overflowed the short *twice*, and we cannot code around this.\n\n The likely cause is having spawn weapons with too many children.");
		}
	} 			
}

// multi_get_network_object() takes a net_signature and tries to locate the object in the object list
// with that network signature.  Returns nullptr if the object cannot be found
object *multi_get_network_object( ushort net_signature )
{
	object *objp;

	if ( net_signature == 0 )
		return nullptr;

	if(GET_FIRST(&obj_used_list) == nullptr)
		return nullptr;

	for ( objp = GET_FIRST(&obj_used_list); objp != END_OF_LIST(&obj_used_list); objp = GET_NEXT(objp) )
		if ( objp->net_signature == net_signature )
			break;

	// if not found on used list, check create list
	if ( objp == END_OF_LIST(&obj_used_list) ) {
		for ( objp = GET_FIRST(&obj_create_list); objp != END_OF_LIST(&obj_create_list); objp = GET_NEXT(objp) )
			if ( objp->net_signature == net_signature )
				break;

		if ( objp == END_OF_LIST(&obj_create_list) )
			objp = nullptr;
	}

	return objp;
}


// -------------------------------------------------------------------------------------------------
// netmisc_calc_checksum() calculates the checksum of a block of memory.
//
//
ushort netmisc_calc_checksum( void * vptr, int len )
{
	ubyte * ptr = (ubyte *)vptr;
	unsigned int sum1,sum2;

	sum1 = sum2 = 0;

	while(len--)	{
		sum1 += *ptr++;
		if (sum1 >= 255 ) sum1 -= 255;
		sum2 += sum1;
	}
	sum2 %= 255;
	
	return (unsigned short)((sum1<<8)+ sum2);
}


// -------------------------------------------------------------------------------------------------
//	multi_random_death_word() will return a word from the below list at random.
//
//	Note:  Keep words grouped into sections of 10

#define NUM_DEATH_WORDS	40

const char *multi_random_death_word()
{
	int index;

	index = Random::next(NUM_DEATH_WORDS);
	switch (index) {
		case 0:
			return XSTR("zapped",853);
		case 1:
			return XSTR("caulked",854);
		case 2:
			return XSTR("killed",855);
		case 3:
			return XSTR("waxed",856);
		case 4:
			return XSTR("popped",857);
		case 5:
			return XSTR("murdered",858);
		case 6:
			return XSTR("bludgeoned",859);
		case 7:
			return XSTR("destroyed",860);
		case 8:
			return XSTR("iced",861);
		case 9:
			return XSTR("obliterated",862);
		case 10:
			return XSTR("toasted",863);
		case 11:
			return XSTR("roasted",864);
		case 12:
			return XSTR("turned into anti-matter",865);
		case 13:
			return XSTR("killed like a pig",866);
		case 14:
			return XSTR("taught a lesson",867);
		case 15:
			return XSTR("slaughtered with impunity",868);
		case 16:
			return XSTR("spanked like a naughty boy",869);
		case 17:
			return XSTR("skunked",870);
		case 18:
			return XSTR("beat senseless",871);
		case 19:
			return XSTR("shot up",872);
		case 20:
			return XSTR("spaced",873);
		case 21:
			return XSTR("hosed",874);
		case 22:
			return XSTR("capped",875);
		case 23:
			return XSTR("beat down",876);
		case 24:
			return XSTR("hit wit da shizzo",877);
		case 25:
			return XSTR("sk00led",878);
		case 26:
			return XSTR("whooped up",879);
		case 27:
			return XSTR("brought to the all-you-can-take whoop ass buffet",880);
		case 28:
			return XSTR("served up a whoop ass sandwich...hold the mercy",881);
		case 29:
			return XSTR("gibbed by Kayser Sozay's rocket",882);
		case 30:
			return XSTR("shot down",883);
		case 31:
			return XSTR("given early retirement",884);
		case 32:
			return XSTR("instructed",885);
		case 33:
			return XSTR("eviscerated",886);
		case 34:
			return XSTR("pummelled",887);
		case 35:
			return XSTR("eradicated",888);
		case 36:
			return XSTR("cleansed",889);
		case 37:
			return XSTR("perforated",890);
		case 38:
			return XSTR("canned",891);
		case 39:
			return XSTR("decompressed",892);
	}

	return NOX("Error");
}

// -------------------------------------------------------------------------------------------------
//	multi_random_chat_start() will return a word from the below list at random.
//
//

#define NUM_CHAT_START_WORDS	8
#define MAX_CHAT_PHRASE_LEN	25		// be careful not to exceed (or update if exceeded)

const char *multi_random_chat_start()
{
	int index;

	index = Random::next(NUM_CHAT_START_WORDS);
	switch (index) {
		case 0:
			return XSTR("says",893);
		case 1:
			return XSTR("bleats",894);
		case 2:
			return XSTR("opines",895);
		case 3:
			return XSTR("postulates",896);
		case 4:
			return XSTR("declares",897);
		case 5:
			return XSTR("vomits out",898);
		case 6:
			return XSTR("whines",899);
		case 7:
			return XSTR("barks",900);
	}

	return NOX("Error");
}

// -------------------------------------------------------------------------------------------------
//	multi_ship_class_lookup() will return the Ship_info[] index for the ship specified as a 
// parameter.
//
//

int multi_ship_class_lookup(const char* ship_name)
{
	// find the ship_info index for the ship_name

	int player_ship_class = -1;
	for (auto it = Ship_info.cbegin(); it != Ship_info.cend(); ++it) {
		if ( !stricmp(it->name, ship_name) ) {
			player_ship_class = (int)std::distance(Ship_info.cbegin(), it);
			break;
		}
	} // end for

	return player_ship_class;
}

// -------------------------------------------------------------------------------------------------
//	find_player() is called when a packet arrives, and we need to know which net player to update.
// The matching is done based on the address and port.  Port checking is done in case multiple
// instances of FreeSpace are running on the same box.
//
//

int find_player( net_addr* addr )
{
	int i;

	for (i = 0; i < MAX_PLAYERS; i++ ) {
		if ( !MULTI_CONNECTED(Net_players[i])){
			continue;
		}
		if ( psnet_same( addr, &(Net_players[i].p_info.addr)) ){
			return i;
		}
	}

	return -1;
}

// so that we can lookup on the admin port transparently
int find_player_no_port(net_addr *addr)
{
	int i;

	for (i = 0; i < MAX_PLAYERS; i++ ) {
		if ( !MULTI_CONNECTED(Net_players[i])){
			continue;
		}

		if ( memcmp(&addr->addr, &Net_players[i].p_info.addr.addr, sizeof(addr->addr)) == 0) {
			return i;
		}
	}

	return -1;
}

// return the index to the players array from the player ID assigned by the Server.
int find_player_index(short player_id)
{
	int i;
	for (i = 0; i < MAX_PLAYERS; i++ ) {
		if ( !MULTI_CONNECTED(Net_players[i])){
			continue;
		}
		if(player_id == Net_players[i].player_id){
			return i;
		}
	}	

	// couldn't find the player
	return -1;
}

// note this is only valid to do on a server!
int find_player_socket(PSNET_SOCKET_RELIABLE sock)
{
	int i;
	for (i = 0; i < MAX_PLAYERS; i++ ) {
		if ( !MULTI_CONNECTED(Net_players[i])){
			continue;
		}
		if(sock == Net_players[i].reliable_socket){
			return i;
		}
	}	

	// couldn't find the player
	return -1;
}

// multi_find_player_by_object returns a player num (reference by Net_players[x]) when given a object *.
// used to find netplayers in game when only the object is known
int multi_find_player_by_object( const object *objp )
{
	int i, objnum;

	objnum = OBJ_INDEX(objp);
	for (i = 0; i < MAX_PLAYERS; i++ ) {
		if ( !MULTI_CONNECTED(Net_players[i])){
			continue;
		}
		if ( objnum == Net_players[i].m_player->objnum ){
			return i;
		}
	}

	// return -1 if the object is not found -- this is a bad situation, but we will handle it in higher
	// level code
	return -1;
}

// returns a player num based upon player object signature
int multi_find_player_by_signature( int signature )
{
	int idx;

	for(idx=0;idx<MAX_PLAYERS;idx++){
		// compare against each player's object signature
		if(MULTI_CONNECTED(Net_players[idx]) && (Objects[Net_players[idx].m_player->objnum].signature == signature)){
			// found the player
			return idx;
		}
	}

	// didn't find the player
	return -1;
}

// returns a player num based upon object net signature
int multi_find_player_by_net_signature(ushort net_signature)
{
	int idx;

	for(idx=0;idx<MAX_PLAYERS;idx++){
		// compare against each player's object signature
		if(MULTI_CONNECTED(Net_players[idx]) && (Objects[Net_players[idx].m_player->objnum].net_signature == net_signature)){
			// found the player
			return idx;
		}
	}

	// didn't find the player
	return -1;
}

// returns a player num based upon it's parse_object unlike the above functions it can be used on respawning players
int multi_find_player_by_parse_object( p_object *p_objp )
{
	int idx;

	for(idx=0;idx<MAX_PLAYERS;idx++){
		// compare against each player's object signature
		if(MULTI_CONNECTED(Net_players[idx]) && (Net_players[idx].p_info.p_objp == p_objp) ){
			// found the player
			return idx;
		}
	}

	// didn't find the player
	return -1;
}

int multi_find_player_by_ship_name(const char *ship_name, bool inc_respawning)
{
	int idx;
	p_object *p_objp;

	// bogus
	if(ship_name == nullptr){
		return -1;
	}

	for(idx=0; idx<MAX_PLAYERS; idx++){
		if(MULTI_CONNECTED(Net_players[idx]) && !MULTI_OBSERVER(Net_players[idx]) && (Net_players[idx].m_player != nullptr) && (Net_players[idx].m_player->objnum >= 0) && (Net_players[idx].m_player->objnum < MAX_OBJECTS) && (Objects[Net_players[idx].m_player->objnum].type == OBJ_SHIP) && 
			(Objects[Net_players[idx].m_player->objnum].instance >= 0) && (Objects[Net_players[idx].m_player->objnum].instance < MAX_SHIPS) && !stricmp(ship_name, Ships[Objects[Net_players[idx].m_player->objnum].instance].ship_name) ){
			return idx;
		}
	}

	if (inc_respawning) {
		p_objp = mission_parse_get_arrival_ship(ship_name);
		idx = multi_find_player_by_parse_object(p_objp);
		
		if((idx >= 0) && (idx < MAX_PLAYERS)){
			return idx;
		}
	}
	// didn't find the player
	return -1;
}

int multi_get_player_ship(int np_index)
{
	// bogus
	if((np_index < 0) || (np_index >= MAX_PLAYERS)){
		return -1;
	}

	// cool?
	if(MULTI_CONNECTED(Net_players[np_index]) && !MULTI_OBSERVER(Net_players[np_index]) && !MULTI_STANDALONE(Net_players[np_index]) && 
		(Net_players[np_index].m_player != nullptr) && (Net_players[np_index].m_player->objnum >= 0) && (Net_players[np_index].m_player->objnum < MAX_OBJECTS) && (Objects[Net_players[np_index].m_player->objnum].type == OBJ_SHIP) && 
		(Objects[Net_players[np_index].m_player->objnum].instance >= 0) && (Objects[Net_players[np_index].m_player->objnum].instance < MAX_SHIPS) ){

		return Objects[Net_players[np_index].m_player->objnum].instance;
	}

	// nope
	return -1;
}

// find_open_netplayer_slot() attempts to find a free slot in the Net_players structure for a new player.
// it returns -1 if there is no new slot, and the slot number if one is found
// NOTE : this attempts to preserve a player object as long as possible for him to come back to
int multi_find_open_netplayer_slot()
{
	int i;
	int found_first;

	found_first = -1;
	for (i = 0; i < MAX_PLAYERS; i++)
		if ( !MULTI_CONNECTED(Net_players[i]) ){
		   if(found_first == -1) {
				found_first = i;
				break;
			}
		}

	if(i == MAX_PLAYERS){
		if(found_first == -1)
			return -1;
		else
			return found_first;
	}

	return i;
}

// find_open_player_slot() attempts to find an open player array slot.  The 0th element of the array
// should always be taken by the console player's pilot.  All other slots are up for grab though.
int multi_find_open_player_slot()
{
	int i;

	for (i = 0; i < MAX_PLAYERS; i++)
		if ( !(Players[i].flags & PLAYER_FLAGS_STRUCTURE_IN_USE) )
			break;
	
	if ( i == MAX_PLAYERS )
		return -1;

	return i;
}

// stuff_netplayer_info stuffs information into the given Net_player structure.  It is called when
// a new person is entering the game.  The state of the Net_player is set to it's basic starting
// state
void stuff_netplayer_info( net_player *nplayer, net_addr *addr, int ship_class, player *pplayer )
{
	nplayer->p_info.addr = *addr;
	nplayer->flags |= NETINFO_FLAG_CONNECTED;
	nplayer->state = NETPLAYER_STATE_JOINING;
	nplayer->p_info.ship_class = ship_class;
	nplayer->m_player = pplayer;
	nplayer->p_info.options.obj_update_level = Cmdline_objupd; // Set the update to the specified value

	// if setting up my net flags, then set the flag to say I can do networking.
	if ( nplayer == Net_player ){
		nplayer->flags |= NETINFO_FLAG_DO_NETWORKING;
	}
}

// multi_assign_player_ship takes a Net_player index and an object * and assigned that player to
// that object
void multi_assign_player_ship( int net_player_num, object *objp,int ship_class )
{
	ship *shipp;

	Assert ( MULTI_CONNECTED(Net_players[net_player_num]) );

	shipp = &Ships[objp->instance];

	Net_players[net_player_num].m_player->objnum = OBJ_INDEX(objp);
	Net_players[net_player_num].p_info.ship_class = ship_class;

	// check to see if we are assigning my player -- if so, then set Player_ship and Player_ai
	if ( Net_player == &Net_players[net_player_num] ) {
		Player_obj = objp;
		Player_ship = shipp;
		Player_ai = &Ai_info[Player_ship->ai_index];
	}

	// find the parse object for this ship.  Also, set the wingman status stuff so wingman status gauge
	// works properly.
	Net_players[net_player_num].p_info.p_objp = mission_parse_get_arrival_ship( shipp->ship_name );
	Assert( Net_players[net_player_num].p_info.p_objp != nullptr );		// get allender -- ship should be on list

	// game server and this client need to initialize this information so object updating
	// works properly.
	if ( MULTIPLAYER_MASTER || (Net_player == &Net_players[net_player_num]) ) {
		Net_players[net_player_num].s_info.eye_pos = objp->pos;
		Net_players[net_player_num].s_info.eye_orient = objp->orient;
	}

}

// -------------------------------------------------------------------------------------------------
//	multi_create_player() is called when a net player needs to be instantiated.  The ship that is created
// depends on the parameter ship_class.  Note that if ship_class is invalid, the ship default_player_ship
// is used.  Returns 1 on success, 0 otherwise

void multi_create_player( int net_player_num, player *pl, const char* name, net_addr* addr, int ship_class, short id)
{
	int player_ship_class = ship_class;
	int current_player_count;

	Assertion ( net_player_num < MAX_PLAYERS, "FSO is attempting to create too many players in multi. This error should be prevented in the UI, please report!" );				// probably shoudln't be able to even get into this routine if no room	
	Assertion(addr != nullptr, "A nullptr net address was passed to multi_create_player(). This is a code error, please report.");
	Assertion(pl != nullptr, "A nullptr player was passed to multi_create_player(). This is a code error, please report.");
	Assertion(name != nullptr, "A nullptr callsign was passed to multi_create_player(). This is a code error, please report.");

	// blast _any_ old data
	Net_players[net_player_num].init();

	// get the current # of players
	current_player_count = multi_num_players();

	// DOH!!! The lack of this caused many bugs. 
	Net_players[net_player_num].flags = (NETINFO_FLAG_DO_NETWORKING);
		
	if ( ship_class == -1 ) {
		nprintf(("Network","Network ==> ship class is -1, creating a default ship for multiplayer\n"));

		// find the ship that matches the string stored in default_player_ship

		for (auto it = Ship_info.cbegin(); it != Ship_info.cend(); ++it) {
			if ( !stricmp(it->name, default_player_ship) ) {
				player_ship_class = (int)std::distance(Ship_info.cbegin(), it);
				break;
			}
		}

		if (player_ship_class == -1)	// if ship_class is -1 (as the condition to enter this branch at all means), then player_ship_class is initialized to -1 as well.
		{
			if(!Ship_info.empty())
			{
				player_ship_class = 0;
				Warning(LOCATION, "Invalid default player ship specified in ship tables. Setting to %s", Ship_info[player_ship_class].name);
			}
			else
			{
				Error(LOCATION, "No ships have been loaded, but we are attempting to set a ship!!");
			}
		}
	}
	
	if ( player_ship_class >= ship_info_size() ) {
		nprintf(("Network","Network ==> Ship class was %d. Creating a default ship for multiplayer\n", player_ship_class));
		player_ship_class = multi_ship_class_lookup(default_player_ship);
	}

	// blast the old player data
	pl->reset();

	// set up the net_player structure
	stuff_netplayer_info( &Net_players[net_player_num], addr, player_ship_class, pl );	Net_players[net_player_num].s_info.num_last_buttons = 0;

	// Net_players[net_player_num].respawn_count = 0;
	Net_players[net_player_num].last_heard_time = timer_get_fixed_seconds();
	Net_players[net_player_num].reliable_socket = PSNET_INVALID_SOCKET;
	Net_players[net_player_num].s_info.kick_timestamp = UI_TIMESTAMP::invalid();
	Net_players[net_player_num].s_info.voice_token_timestamp = UI_TIMESTAMP::invalid();
	Net_players[net_player_num].s_info.player_collision_timestamp = TIMESTAMP::immediate();
	Net_players[net_player_num].s_info.tracker_security_last = -1;
	Net_players[net_player_num].s_info.target_objnum = -1;
	Net_players[net_player_num].s_info.accum_buttons = 0;

	// zero out this players ping times data
	multi_ping_reset(&Net_players[net_player_num].s_info.ping);

	// zero out his object update and control info sequencing data
	Net_players[net_player_num].client_cinfo_seq = 0;
	Net_players[net_player_num].client_server_seq = 0;		
	
	// timestamp his last_full_update_time
	Net_players[net_player_num].s_info.last_full_update_time = UI_TIMESTAMP::immediate();

	// nil his file xfer handle
	Net_players[net_player_num].s_info.xfer_handle = -1;

	// nil his data rate timestamp stuff
	Net_players[net_player_num].s_info.rate_stamp = -1;
	Net_players[net_player_num].s_info.rate_bytes = 0;

	// nil packet buffer stuff
	Net_players[net_player_num].s_info.unreliable_buffer_size = 0;
	Net_players[net_player_num].s_info.reliable_buffer_size = 0;
	
	// various ack handles	
	strcpy_s(pl->callsign, name);
	pilot_set_short_callsign(pl, SHORT_CALLSIGN_PIXEL_W);   // calculate the short callsign 
	pl->flags |= PLAYER_FLAGS_STRUCTURE_IN_USE;
	pl->objnum = -1;
	pl->insignia_texture = -1;

	// if we're the standalone server and this is the first guy to join, mark him as the host
	// and give him all host priveleges
	if ( (Game_mode & GM_STANDALONE_SERVER) && (current_player_count == 0) ) {
		Net_players[net_player_num].flags |= NETINFO_FLAG_GAME_HOST;
	}
	
	Net_players[net_player_num].player_id = id;

	Net_player->sv_bytes_sent = 0;
	Net_player->sv_last_pl = -1;
	Net_player->cl_bytes_recvd = 0;
	Net_player->cl_last_pl = -1;

	// add to the escort list
	if(MULTI_IN_MISSION){
		hud_escort_add_player(id);
	}
}

// next function makes a player object an ai object (also decrementing the num_players in the
// netgame).  It appropiately sets the object flags and other interesting AI information which
// ought to get set in order to make this new ai object behave correctly.
void multi_make_player_ai( object *pobj )
{

	Assertion(pobj != nullptr, "Invalid player object passed to multi_make_player_ai(). Code error, please report!");

	if ( pobj->type != OBJ_SHIP )
		return;

    pobj->flags.remove(Object::Object_Flags::Player_ship);
    obj_set_flags(pobj, pobj->flags + Object::Object_Flags::Could_be_player - Object::Object_Flags::Invulnerable);

	// target_objnum must be -1 or else new AI ship will fire on whatever this player
	// had targeted.
	set_target_objnum( &(Ai_info[Ships[pobj->instance].ai_index]), -1 );

}

// delete_player takes an index into the Net_players array to delete.  Deletion of a player might happen
// because of the player leaving the game on his own, or no net activity from the player after X seconds
void delete_player(int player_num,int kicked_reason)
{			
	char notify_string[256] = "";
	int idx;

	Assertion(Net_player != nullptr, "Somehow Net_player is nullptr when trying to delete a player. Please get an SCP coder!");	
	if (Net_player == nullptr) {
		return;
	}

	if(!MULTI_CONNECTED(Net_players[player_num])){
		return;
	}

	// NETLOG
	ml_printf(NOX("Deleting player %s"), Net_players[player_num].m_player->callsign);
	
	psnet_rel_close_socket(Net_players[player_num].reliable_socket);					// close out the reliable socket

	// if this guy was ingame joining, the remove my netgame flag so others may join
	if ( Net_players[player_num].flags & NETINFO_FLAG_INGAME_JOIN ) {
		Netgame.flags &= ~NG_FLAG_INGAME_JOINING;
		Netgame.flags &= ~NG_FLAG_INGAME_JOINING_CRITICAL;
	}
	
	Net_players[player_num].flags &= ~NETINFO_FLAG_CONNECTED;							// person not connected anymore
	Net_players[player_num].m_player->flags &= ~(PLAYER_FLAGS_STRUCTURE_IN_USE);    // free up his player structure

	Net_players[player_num].s_info.reliable_connect_time = -1;

	// add to the escort list
	hud_escort_remove_player(Net_players[player_num].player_id);

	// is this guy the server
	if(Net_players[player_num].flags & NETINFO_FLAG_AM_MASTER){
		// if the server leaves in the debriefing state, we should still wait until the player selects accept before we quit
		if ((gameseq_get_state() != GS_STATE_DEBRIEF) && (gameseq_get_state() != GS_STATE_MULTI_DOGFIGHT_DEBRIEF)){
			multi_quit_game(PROMPT_NONE, MULTI_END_NOTIFY_SERVER_LEFT);
		}		
	}
	// if he was just the host	
	else if(Net_players[player_num].flags & NETINFO_FLAG_GAME_HOST){
		Net_players[player_num].flags &= ~(NETINFO_FLAG_GAME_HOST);
	
		// am I the server
		if ( (Net_player != nullptr) && (Net_player->flags & NETINFO_FLAG_AM_MASTER) ) {
			// are we a standalone server and in a mission?
			if((Game_mode & GM_STANDALONE_SERVER) && MULTI_IN_MISSION){			
				// choose a new host			
				int found_new_host = 0;
				for(idx=0; idx<MAX_PLAYERS; idx++){
					if(MULTI_CONNECTED(Net_players[idx]) && (Net_player != &Net_players[idx])){
						// make this guy the host
						Net_players[idx].flags |= NETINFO_FLAG_GAME_HOST;
						// set the host pointer
						Netgame.host = &Net_players[idx];

						// send a packet
						send_host_captain_change_packet(Net_players[idx].player_id, false);

						found_new_host = 1;
						break;
					}
				}
				// end the game		
				if(!found_new_host){
					multi_quit_game(PROMPT_NONE, MULTI_END_NOTIFY_NONE, MULTI_END_ERROR_HOST_LEFT);
				}			 
			} else {
				multi_quit_game(PROMPT_NONE, MULTI_END_NOTIFY_NONE, MULTI_END_ERROR_HOST_LEFT);
			}
		} 
	}

	// if we're the server of the game, notify everyone else that this guy has left
	// if he's marked as being kicked, then other players know about it already, so don't send again
	if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
		if(Net_players[player_num].flags & NETINFO_FLAG_KICKED){
			char str[512];
			memset(str, 0, 512);
			multi_kick_get_text(&Net_players[player_num], Net_players[player_num].s_info.kick_reason, str);
			multi_display_chat_msg(str, player_num, 0);							 
		} else {
			send_leave_game_packet(Net_players[player_num].player_id, kicked_reason);
		}
	}
	
	// if this guy is an observer, we have to make sure we delete his observer object (only if we're the server however)
	if( (Net_player->flags & NETINFO_FLAG_AM_MASTER) && (Net_players[player_num].flags & NETINFO_FLAG_OBSERVER) ) {
		if ( Net_players[player_num].m_player->objnum != -1 ){
			obj_delete(Net_players[player_num].m_player->objnum);			// maybe change this to set flag instead		
		}
	} else {
		// otherwise mark it so that he can return to it later if possible
		if ( (Net_players[player_num].m_player->objnum >= 0) && (Net_players[player_num].m_player->objnum < MAX_OBJECTS) && (Objects[Net_players[player_num].m_player->objnum].type == OBJ_SHIP) && (Objects[Net_players[player_num].m_player->objnum].instance >= 0) && (Objects[Net_players[player_num].m_player->objnum].instance < MAX_SHIPS)) {
			multi_make_player_ai( &Objects[Net_players[player_num].m_player->objnum] );
		} else {
			multi_respawn_player_leave(&Net_players[player_num]);
		}
	}

	// if we're in the team select, and we're the host, we have to make sure all team select data is correctly updated			
	// MWA 7/28/98.  Don't do this for a standalone server.  Since he doesn't go through the team selection
	// screens, his data structures are not 100% accurate.  Doing so on a standalone resulted in the wrong
	// ships getting marked as COULD_BE_PLAYER.  On the standalone, these flags will get properly set
	// in the multi_make_player_ai code above.
	if( (Netgame.game_state == NETGAME_STATE_BRIEFING) && !(Game_mode & GM_STANDALONE_SERVER) ) {
		multi_ts_handle_player_drop();			
	}								

	if (gameseq_get_state() == GS_STATE_DEBRIEF){
		debrief_handle_player_drop();
	}

	// handle any specific dropping conditions
	if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
		multi_team_handle_drop();
	}	
	multi_data_handle_drop(player_num);	

	// tell the pinfo popup that a player has left
	multi_pinfo_notify_drop(&Net_players[player_num]);

	// tell the datarate stuff that the player has dropped
	multi_rate_reset(player_num);

	// display a message that this guy has left
	if(*Net_players[player_num].m_player->callsign){
		sprintf(notify_string,XSTR("<%s has left>",901),Net_players[player_num].m_player->callsign);
		multi_display_chat_msg(notify_string,0,0);
	}
	
	// standalone gui type stuff
	if (Game_mode & GM_STANDALONE_SERVER) {
		std_remove_player(&Net_players[player_num]);
		std_connect_set_connect_count();
	}

	// blast this memory clean
	Net_players[player_num].init();
	Net_players[player_num].reliable_socket = PSNET_INVALID_SOCKET;

	extern UI_TIMESTAMP Multi_client_update_times[MAX_PLAYERS];	// NOLINT
	Multi_client_update_times[player_num] = UI_TIMESTAMP::invalid();
}

#define INACTIVE_LIMIT_NORMAL (15 * F1_0)
#define INACTIVE_LIMIT_WAIT   (20 * F1_0)

// -------------------------------------------------------------------------------------------------
//	multi_cull_zombies() will check if there has been any net players or observers that have been inactive for
// INACTIVE_LIMIT milliseconds since last check.  If so, they are taken out of the net game.
//
//

void multi_cull_zombies()
{
#if 0
	fix current_time;
	int inactive_limit;
	int i;

	if(gameseq_get_state() == GS_STATE_MULTI_WAIT)
		inactive_limit = INACTIVE_LIMIT_WAIT;
	else
		inactive_limit = INACTIVE_LIMIT_NORMAL;

	current_time = timer_get_fixed_seconds();

	for (i = 0; i < MAX_PLAYERS; i++) {
		if ( !MULTI_CONNECTED(&Net_players[i])){
			continue;
		}

		// server will(should) cull out players based on their sockets dying.
		if ( Net_players[i].flags & NETINFO_FLAG_MASTER ){
			continue;
		}

		if ( (current_time - Net_players[i].last_heard_time) > inactive_limit) {
			HUD_printf(XSTR("Dumping %s after prolonged inactivity",902),Net_players[i].m_player->callsign);
			nprintf(("Network", "Assuming %s is a zombie, removing from game\n", Net_players[i].m_player->callsign));

			multi_kick_player(i,0);			
		}
	}
#endif
}

// -------------------------------------------------------------------------------------------------
// fill_net_addr() helper function that fills in the address and port for a referenced address struct
//
//

void fill_net_addr(net_addr* addr, ubyte* address, ushort port)
{
	Assertion(addr != nullptr, "Invalid net address struct was passed to fill_net_addr(). Code error, please report.");
	Assertion(address != nullptr, "Invalid net address was passed to fill_net_addr()");

	memcpy(addr->addr, address, sizeof(addr->addr));
	addr->port = port;
}

// non-16byte version of matrix packing
// return size of packed matrix
void multi_pack_orient_matrix(ubyte *data,matrix *m)
{	
	data[16] = 0;
	float x1, y1, x2, y2;

	if(m->vec.rvec.xyz.z < 0) data[16] |= (1<<0);	// X
	if(m->vec.uvec.xyz.z < 0) data[16] |= (1<<1);	// Y
	if(m->vec.fvec.xyz.z < 0) data[16] |= (1<<2);	// V
	if(m->vec.fvec.xyz.x < 0) data[16] |= (1<<3);	// Z
	if(m->vec.fvec.xyz.y < 0) data[16] |= (1<<4);	// W

	x1 = INTEL_FLOAT(&m->vec.rvec.xyz.x);
	y1 = INTEL_FLOAT(&m->vec.rvec.xyz.y);
	x2 = INTEL_FLOAT(&m->vec.uvec.xyz.x);
	y2 = INTEL_FLOAT(&m->vec.uvec.xyz.y);

	memcpy(&data[0], &x1, 4);		// a
	memcpy(&data[4], &y1, 4);		// b
	memcpy(&data[8], &x2, 4);		// c
	memcpy(&data[12], &y2, 4);		// d
}

// return bytes processed
// non-16 byte version of unpack matrix code
void multi_unpack_orient_matrix(ubyte *data,matrix *m)
{
	float x1, y1, x2, y2;

	memcpy(&x1, &data[0], 4);
	memcpy(&y1, &data[4], 4);
	memcpy(&x2, &data[8], 4);
 	memcpy(&y2, &data[12],4);

	m->vec.rvec.xyz.x = INTEL_FLOAT(&x1);
	m->vec.rvec.xyz.y = INTEL_FLOAT(&y1);
	m->vec.uvec.xyz.x = INTEL_FLOAT(&x2);
	m->vec.uvec.xyz.y = INTEL_FLOAT(&y2);

	m->vec.rvec.xyz.z = fl_sqrt(fl_abs(1 - (m->vec.rvec.xyz.x * m->vec.rvec.xyz.x) - (m->vec.rvec.xyz.y * m->vec.rvec.xyz.y))); // X
	m->vec.uvec.xyz.z = fl_sqrt(fl_abs(1 - (m->vec.uvec.xyz.x * m->vec.uvec.xyz.x) - (m->vec.uvec.xyz.y * m->vec.uvec.xyz.y))); // Y
	m->vec.fvec.xyz.z = fl_sqrt(fl_abs(1 - (m->vec.rvec.xyz.z * m->vec.rvec.xyz.z) - (m->vec.uvec.xyz.z * m->vec.uvec.xyz.z))); // V
	m->vec.fvec.xyz.x = fl_sqrt(fl_abs(1 - (m->vec.rvec.xyz.x * m->vec.rvec.xyz.x) - (m->vec.uvec.xyz.x * m->vec.uvec.xyz.x))); // Z
	m->vec.fvec.xyz.y = fl_sqrt(fl_abs(1 - (m->vec.rvec.xyz.y * m->vec.rvec.xyz.y) - (m->vec.uvec.xyz.y * m->vec.uvec.xyz.y))); // W

	m->vec.rvec.xyz.z *= (data[16] & (1<<0)) ? -1.0f : 1.0f;
	m->vec.uvec.xyz.z *= (data[16] & (1<<1)) ? -1.0f : 1.0f;
	m->vec.fvec.xyz.z *= (data[16] & (1<<2)) ? -1.0f : 1.0f;
	m->vec.fvec.xyz.x *= (data[16] & (1<<3)) ? -1.0f : 1.0f;
	m->vec.fvec.xyz.y *= (data[16] & (1<<4)) ? -1.0f : 1.0f;
}
	                      
void multi_do_client_warp(float frame_time)
{
	for (auto moveup: list_range(&Ship_obj_list))
	{
		if (Objects[moveup->objnum].flags[Object::Object_Flags::Should_be_dead])
			continue;

		// do all _necessary_ ship warp in (arrival) processing
		if ( Ships[Objects[moveup->objnum].instance].is_arriving() )	
			shipfx_warpin_frame( &Objects[moveup->objnum], frame_time );
	}	
}	

// ------------------------------------------------------------------------------------
// ship status change stuff

int lookup_ship_status(net_player *p,int unique_id,int remove)
{
	int idx;
	
	for(idx=0;idx<p->s_info.num_last_buttons;idx++){
		if(p->s_info.last_buttons_id[idx] == unique_id){
			if(remove){
				remove_ship_status_item(p,idx);
				p->s_info.num_last_buttons--;
			}
			return 1;
		}
	}
	return 0;
}

void remove_ship_status_item(net_player *p,int id)
{
	int idx;
	for(idx=id;idx<BUTTON_INFO_SAVE_COUNT-1;idx++){
		p->s_info.last_buttons[idx] = p->s_info.last_buttons[idx+1];
		p->s_info.last_buttons_id[idx] = p->s_info.last_buttons_id[idx+1];
		p->s_info.last_buttons_time[idx] = p->s_info.last_buttons_time[idx+1];
	}
}

// 
void add_net_button_info(net_player *p,button_info *bi,int unique_id)
{
   int lookup,idx;
	fix earliest;

	// if the list is full, put it in the oldest slot since it's probably a lost packet anyway
   if(p->s_info.num_last_buttons < BUTTON_INFO_SAVE_COUNT-1){
		p->s_info.last_buttons[p->s_info.num_last_buttons] = *bi;
		p->s_info.last_buttons_id[p->s_info.num_last_buttons] = unique_id;
		p->s_info.last_buttons_time[p->s_info.num_last_buttons] = timer_get_fixed_seconds();
		p->s_info.num_last_buttons++;
	} else {
		earliest = 0;
      lookup = -1;
		for(idx=0;idx<BUTTON_INFO_SAVE_COUNT;idx++){
			if((p->s_info.last_buttons_time[idx] < earliest) || (earliest == 0)){
				earliest = p->s_info.last_buttons_time[idx];
				lookup = idx;
			}
		}
		if(lookup != -1){
			p->s_info.last_buttons[lookup] = *bi;
			p->s_info.last_buttons_id[lookup] = unique_id;
			p->s_info.last_buttons_time[lookup] = timer_get_fixed_seconds();
		}
	}		
}

extern int button_function_critical(int n,net_player *p = nullptr);
void multi_apply_ship_status(net_player *p,button_info *bi,int locally)
{
	int i, j;
	Multi_button_info_ok=1;
	for ( i = 0; i < NUM_BUTTON_FIELDS; i++ ) {
		if ( bi->status[i] == 0 )
			continue;
		// at least one bit is set in the status integer
		for ( j = 0; j < 32; j++ ) {

			// check if the bit is set. If button_function returns 1 (implying the action was taken), then unset the bit
			if ( bi->status[i] & (1<<j) ) {
            if(locally){
					if(button_function_critical(32*i + j,nullptr))   // will apply to this console
						bi->status[i] &= ~(1<<j);
				} else {
					if(button_function_critical(32*i + j,p))      // will only apply to a net-player
						bi->status[i] &= ~(1<<j);
				}
			}
		}
	}
	Multi_button_info_ok=0;
}

// send 10x a second MAX
#define MULTI_SHIP_STATUS_TIME			350
int Multi_ship_status_stamp = -1;
button_info Multi_ship_status_bi;

void multi_maybe_send_ship_status()
{
	int idx;
	button_info *bi = &Player->bi;

	// strip out noncritical button presses
	button_strip_noncritical_keys(bi);

	// xor all fields into the accum button info
	for(idx=0; idx<NUM_BUTTON_FIELDS; idx++){		
		Multi_ship_status_bi.status[idx] |= bi->status[idx];		
	}

	// check timestamp
	if((Multi_ship_status_stamp < 0) || timestamp_elapsed_safe(Multi_ship_status_stamp, MULTI_SHIP_STATUS_TIME*2)){
		int should_send = 0;
		for(idx=0; idx<NUM_BUTTON_FIELDS; idx++){			
			// we have at least something to send
			if(Multi_ship_status_bi.status[idx] != 0){
				should_send = 1;			
			}		
		}

		// do we have something to send
		if(should_send){
			// add_net_button_info(Net_player, &Multi_ship_status_bi, Multi_button_info_id);
			send_ship_status_packet(Net_player, &Multi_ship_status_bi, Multi_button_info_id++);
		}

		// zero it out
		memset(&Multi_ship_status_bi, 0, sizeof(button_info));

		// reset timestamp
		Multi_ship_status_stamp = timestamp(MULTI_SHIP_STATUS_TIME);
	}
}

int multi_find_player_by_callsign(const char *callsign)
{
	int idx;
	for(idx=0;idx<MAX_PLAYERS;idx++){
		if(MULTI_CONNECTED(Net_players[idx]) && (strcmp(callsign,Net_players[idx].m_player->callsign)==0)){
			return idx;
		}
	}

	return -1;
}

// if Game_current_mission_filename is a builtin multiplayer mission
int multi_is_builtin_mission()
{
	// int idx;
	char name[512];

	// get the full filename
	memset(name,0,512);
	strcpy_s(name,Game_current_mission_filename);
	cf_add_ext(name, FS_MISSION_FILE_EXT);

	// if this mission is builtin	
	if(game_find_builtin_mission(name) != nullptr){
		return 1;
	}

	// not builtin
	return 0;
}

// verify that the player has a valid mission file and do 1 of 3 things
void server_verify_filesig(short player_id, ushort sum_sig, int length_sig)
{   	
	net_player *pl;
   int player;
	int ok;	
	int is_builtin;
   
	player = find_player_index(player_id);
	Assert(player >= 0);
	if(player < 0){
		return;
	}
	pl = &Net_players[player];

	// if the current mission is a builtin mission, check stuff out
	is_builtin = multi_is_builtin_mission();
		
	if(is_builtin){
		// if the player doesn't have it, kick him
		if((sum_sig == 0xffff) && (length_sig == -1)){
			multi_kick_player(player, 0, KICK_REASON_CANT_XFER);
		} else {
			pl->flags |= NETINFO_FLAG_MISSION_OK;
		}

		// done
		return;
	}

	if( (length_sig != Multi_current_file_length) || (sum_sig != Multi_current_file_checksum)){
		ok = 0;
	} else {
		ok = 1;	
	}

   // in an ingame join situation
	if(pl->flags & NETINFO_FLAG_INGAME_JOIN){		
		if(!ok){
			// if the netgame settings allow in-mission file xfers
			if(Netgame.options.flags & MSO_FLAG_INGAME_XFER){
				pl->s_info.ingame_join_flags |= INGAME_JOIN_FLAG_FILE_XFER;
				pl->s_info.xfer_handle = multi_xfer_send_file(pl->reliable_socket, Netgame.mission_name, CF_TYPE_MISSIONS);
			}
			// otherwise send him a nak and tell him to get away 
			else {
				send_ingame_nak(ACK_FILE_ACCEPTED,pl);
			}
		} else {
			pl->flags |= NETINFO_FLAG_MISSION_OK;
		}
	}
	// in a normal join situation
	else {
		// if the file does not check out, send it to him
		if(!ok){			
			pl->s_info.xfer_handle = multi_xfer_send_file(pl->reliable_socket, Netgame.mission_name, CF_TYPE_MISSIONS);
		}
		// otherwise mark him as having a valid mission
		else {
			pl->flags |= NETINFO_FLAG_MISSION_OK;			
		}
	}
}

// check to see if every client has NETINFO_FLAG_MISSION_OK
int server_all_filesigs_ok()
{
	int idx;
	int ok = 1;
	
	for(idx=0;idx<MAX_PLAYERS;idx++){
		if(MULTI_CONNECTED(Net_players[idx]) && !(Net_players[idx].flags & NETINFO_FLAG_MISSION_OK)){
			ok = 0;
			break;
		}
	}

	return ok;
}

void multi_untag_player_ships()
{
	for (auto moveup: list_range(&Ship_obj_list))
	{
		if (Objects[moveup->objnum].flags[Object::Object_Flags::Should_be_dead])
			continue;

		if(Objects[moveup->objnum].flags[Object::Object_Flags::Player_ship]){
            Objects[moveup->objnum].flags.remove(Object::Object_Flags::Player_ship);
			obj_set_flags( &Objects[moveup->objnum], Objects[moveup->objnum].flags + Object::Object_Flags::Could_be_player);
		}
	}
}

// broadcast alltime stats to everyone in the game
void multi_broadcast_stats(int stats_code)
{
	int idx;

	// broadcast everyone's stats to everyone else
	for(idx=0;idx<MAX_PLAYERS;idx++){
		if(MULTI_CONNECTED(Net_players[idx]) && !MULTI_PERM_OBSERVER(Net_players[idx]) && !MULTI_STANDALONE(Net_players[idx])){			
			send_player_stats_block_packet(&Net_players[idx], stats_code);
		}
	}			
}

// check to see if all players other than the local player are in a given NETPLAYER_ state
// this is _EXTREMELY_ useful when doing network sequencing with the reliable sockets
int multi_netplayer_state_check(int state,int ignore_standalone)
{
	int idx;	
	for(idx=0;idx<MAX_PLAYERS;idx++){
		if(MULTI_CONNECTED(Net_players[idx]) && (Net_player->player_id != Net_players[idx].player_id)){
			if(ignore_standalone && ((Net_players[idx].flags & NETINFO_FLAG_AM_MASTER) && !(Net_players[idx].flags & NETINFO_FLAG_GAME_HOST)) ){
				continue;
			}

			if(Net_players[idx].state != state){
				return 0;
			}
		}
	}
	return 1;
}

int multi_netplayer_state_check2(int state, int state2, int ignore_standalone)
{
	int idx;	
	for(idx=0;idx<MAX_PLAYERS;idx++){
		if(MULTI_CONNECTED(Net_players[idx]) && (Net_player->player_id != Net_players[idx].player_id)){
			if(ignore_standalone && ((Net_players[idx].flags & NETINFO_FLAG_AM_MASTER) && !(Net_players[idx].flags & NETINFO_FLAG_GAME_HOST)) ){
				continue;
			}

			if((Net_players[idx].state != state) && (Net_players[idx].state != state2)){
				return 0;
			}
		}
	}
	return 1;
}

int multi_netplayer_state_check3(int state, int state2, int state3, int ignore_standalone)
{
	int idx;	
	for(idx=0;idx<MAX_PLAYERS;idx++){
		if(MULTI_CONNECTED(Net_players[idx]) && (Net_player->player_id != Net_players[idx].player_id)){
			if(ignore_standalone && ((Net_players[idx].flags & NETINFO_FLAG_AM_MASTER) && !(Net_players[idx].flags & NETINFO_FLAG_GAME_HOST)) ){
				continue;
			}

			if((Net_players[idx].state != state) && (Net_players[idx].state != state2) && (Net_players[idx].state != state3)){
				return 0;
			}
		}
	}
	return 1;
}

// check to see if all players other than the local player are in a given NETPLAYER_ state
// this is _EXTREMELY_ useful when doing network sequencing with the reliable sockets
int multi_netplayer_flag_check(int flags,int ignore_standalone)
{
	int idx;	
	for(idx=0;idx<MAX_PLAYERS;idx++){
		if(MULTI_CONNECTED(Net_players[idx]) && (Net_player->player_id != Net_players[idx].player_id)){
			if(ignore_standalone && ((Net_players[idx].flags & NETINFO_FLAG_AM_MASTER) && !(Net_players[idx].flags & NETINFO_FLAG_GAME_HOST)) ){
				continue;
			}

			if(!(Net_players[idx].flags & flags)){
				return 0;
			}
		}
	}
	return 1;
}

// function which gets called from psnet_* code to evaluate an error received on a reliable
// socket.  In general, we only want to do drastic measures if the error indicates that the client
// is no longer there.
void multi_eval_socket_error(PSNET_SOCKET sock, int error)
{
	if ( error == WSAENOTSOCK ){
		nprintf(("Network","Socket connection terminated and/or nonexistent, bailing..\n"));

		// mwa -- don't go back to main menu.  You don't want host to do this.  Maybe we can ignore it
		// because of a leaving player.
		return;
	}

	if ( (error != WSAECONNRESET) && (error != WSAECONNABORTED) && (error != WSAESHUTDOWN) ) {
		nprintf(("Network", "Error %d received on reliable socket -- ignoring\n", error));
		return;
	}

	if(error == WSAESHUTDOWN){
		nprintf(("Network","Received WSAESHUTDOWN on client socket. Cool.\n"));
	}

	// mwa -- always return for now because debugging with the stuff below is a real pain.
	// in essence, you can't do it!
	//return;

	if( Net_player->flags & NETINFO_FLAG_AM_MASTER ) {
		int idx;

		nprintf(("Network", "pitching player because drop on reliable socket\n"));
		// find the netplayer whose socket we have an error on.  Dump the player when we find him.
		// NOTE : make sure not to ban him
		for(idx=0;idx<MAX_PLAYERS;idx++){
			if(Net_players[idx].reliable_socket == sock){
				delete_player(idx);
				return;
			}
		}
	} else {
		nprintf(("Network", "Communications to server lost -- quitting game\n"));
		multi_quit_game(PROMPT_NONE, MULTI_END_NOTIFY_NONE, MULTI_END_ERROR_CONTACT_LOST);
	}
}

// send a repair info packet with code == code to a player if his object is the one being acted upon
// dest_objp is the player object (or possible player object).  source_objp is the object pointer
// of the repair ship that is the source of the action.  code means what is happening -- queueing up
// for repair, getting repaired, aborted, complete, etc. 
void multi_maybe_send_repair_info(object *dest_objp, object *source_objp, int code )
{
	// only send information on player objects
	if ( !MULTIPLAYER_MASTER )
		return;
	
	Assert( dest_objp->type == OBJ_SHIP );
	Assert( dest_objp != source_objp );

	send_repair_info_packet( dest_objp, source_objp, code );
}

int multi_is_valid_unknown_packet(ubyte type){
	return (type == GAME_QUERY) || (type == JOIN) || (type == PING) || (type == PONG) || (type == GAME_INFO)
		|| (type == ACCEPT) || (type == GAME_ACTIVE) || (type == INGAME_NAK) || (type == DENY)
		|| (type == UPDATE_DESCRIPT) || (type == ACCEPT_PLAYER_DATA) ? 1 : 0;	
}

void multi_create_standalone_object()
{
	// now create a dummy ship for the standalone
	matrix m = IDENTITY_MATRIX;
	vec3d v;
	int objnum, pobj_num;

	vm_vec_zero(&v);
	objnum = observer_create(&m,&v);

	if (objnum < 0) {
		Error(LOCATION, "Failed to create standalone observer object! Please investigate!");
		return;
	}

	Player_obj = &Objects[objnum];
    Player_obj->flags.remove(Object::Object_Flags::Player_ship);
	obj_set_flags(Player_obj, Player_obj->flags - Object::Object_Flags::Collides);
	Net_player->m_player->objnum = objnum;

	// create the default player ship object and use that as my default virtual "ship", and make it "invisible"
	pobj_num = parse_create_object(Player_start_pobject, true);
	Assert(pobj_num != -1);
    flagset<Object::Object_Flags> tmp_flags;
	obj_set_flags(&Objects[pobj_num], tmp_flags + Object::Object_Flags::Player_ship);
	Objects[pobj_num].net_signature = STANDALONE_SHIP_SIG;
	Player_ship = &Ships[Objects[pobj_num].instance];

	// make ship hidden from sensors so that this observer cannot target it.  Observers really have two ships
	// one observer, and one "Player_ship".  Observer needs to ignore the Player_ship.
    Player_ship->flags.set(Ship::Ship_Flags::Hidden_from_sensors);
	strcpy_s(Player_ship->ship_name, XSTR("Standalone Ship",904));
	Player_ai = &Ai_info[Ships[Objects[pobj_num].instance].ai_index];		

}

int multi_message_should_broadcast(int type)
{
	switch (type) {
		case MESSAGE_ARRIVE_ENEMY:
		case MESSAGE_HELP:
		case MESSAGE_BACKUP:
		case MESSAGE_SUPPORT_KILLED:
			return 1; 
		default:
			return 0;
	}
}

// active game list handling functions
active_game *multi_new_active_game( void )
{
	active_game new_game;

	try {
			Active_games.push_back(new_game);
	} catch (const std::bad_alloc&) {
			// Handle memory allocation failure
			nprintf(("Network", "Cannot allocate space for new active game structure\n"));
			return nullptr;
	}

	// Notify the join game screen of this new item
	multi_join_notify_new_game();

	return &Active_games.back();
}

active_game *multi_update_active_games(active_game *ag)
{
	active_game *gp = nullptr;		

	// see if we have a game from this address already -- if not, create one.  In either case, get a pointer
	// to an active_game structure
	if ( !Active_games.empty() ) {	// no games on list at all

		bool on_list = false;

		for (auto game = Active_games.begin(); game != Active_games.end(); ++game) {
			if (psnet_same(&game->server_addr, &ag->server_addr)) {
				on_list = true;
				gp = &(*game);
				break;
			}
		}

		// insert in the list
		if (!on_list){
			gp = multi_new_active_game();
			// gp->ping_time = -1.0f;			

			// copy in the game information
			memcpy(&gp->server_addr, &ag->server_addr, sizeof(gp->server_addr));
			strcpy_s(gp->name,ag->name);
			strcpy_s(gp->mission_name,ag->mission_name);
			strcpy_s(gp->title,ag->title);			
			gp->num_players = ag->num_players;
			gp->flags = ag->flags;
			
			// ping him
			/*
			gp->ping_start = timer_get_fixed_seconds();
			gp->ping_end = -1;
			send_ping(&gp->server_addr);			
			*/
			multi_ping_reset(&gp->ping);
			multi_ping_send(&gp->server_addr,&gp->ping);
		}
		// otherwise update the netgame info we have for this guy
		else {				
			memset(gp->name,0,MAX_GAMENAME_LEN+1);
			strcpy_s(gp->name,ag->name);
			memset(gp->mission_name,0,NAME_LENGTH+1);
			strcpy_s(gp->mission_name,ag->mission_name);
			memset(gp->title,0,NAME_LENGTH+1);
			strcpy_s(gp->title,ag->title);			
			gp->num_players = ag->num_players;
			gp->flags = ag->flags;			
		}
	} else {
		gp = multi_new_active_game();
		// gp->ping_time = -1.0f;		

		// copy in the game information	
		memcpy(&gp->server_addr, &ag->server_addr, sizeof(gp->server_addr));
		strcpy_s(gp->name,ag->name);
		strcpy_s(gp->mission_name,ag->mission_name);
		strcpy_s(gp->title,ag->title);		
		gp->num_players = ag->num_players;
		gp->flags = ag->flags;
		
		// ping him
		// gp->ping_start = timer_get_fixed_seconds();
		// gp->ping_end = -1;
		// send_ping(&gp->server_addr);
		multi_ping_reset(&gp->ping);
		multi_ping_send(&gp->server_addr,&gp->ping);
	}		

	// don't do anything if we don't have a game entry
	if(gp == nullptr){
		return nullptr;
	}
	
	// update the last time we heard from him
	if ( !MULTI_IS_TRACKER_GAME && (Multi_options_g.protocol == NET_TCP) && (Net_player->p_info.options.flags & MLO_FLAG_LOCAL_BROADCAST)){
		gp->heard_from_timer = ui_timestamp(MULTI_JOIN_SERVER_TIMEOUT_LOCAL);
	} else {
		gp->heard_from_timer = ui_timestamp(MULTI_JOIN_SERVER_TIMEOUT);
	}

	return gp;
}

server_item *multi_new_server_item( void )
{
	server_item *new_game;

	new_game = (server_item *)vm_malloc(sizeof(server_item));
	if ( new_game == nullptr ) {
		nprintf(("Network", "Cannot allocate space for new server_item structure\n"));
		return nullptr;
	}

	if ( Game_server_head != nullptr ) {
		new_game->next = Game_server_head->next;
		new_game->next->prev = new_game;
		Game_server_head->next = new_game;
		new_game->prev = Game_server_head;
	} else {
		Game_server_head = new_game;
		Game_server_head->next = Game_server_head->prev = Game_server_head;
	}
		
	return new_game;
}

void multi_free_server_list()
{
	server_item *moveup,*backup;	

	moveup = Game_server_head;
	backup = nullptr;
	if(moveup != nullptr){
		do {			
			backup = moveup;
			moveup = moveup->next;
			
			vm_free(backup);
			backup = nullptr;
		} while(moveup != Game_server_head);
		Game_server_head = nullptr;
	}	
}

int multi_num_players()
{
	int idx,count;

	// count the players who are actively connected
	count = 0;
	for(idx=0;idx<MAX_PLAYERS;idx++){
		// count all connected players except the standalone server (if any)
		if(MULTI_CONNECTED(Net_players[idx]) && !MULTI_STANDALONE(Net_players[idx]) && !MULTI_PERM_OBSERVER(Net_players[idx])){			
			count++;
		}
	}

	return count;
}

int multi_num_observers()
{
	int idx,count;

	// count the players who are actively connected
	count = 0;
	for(idx=0;idx<MAX_PLAYERS;idx++){
		// count all connected players except the standalone server (if any)
		if(MULTI_CONNECTED(Net_players[idx]) && MULTI_PERM_OBSERVER(Net_players[idx])){
			count++;
		}
	}

	return count;

}

int multi_num_connections()
{
	int idx,count;

	// count the players who are actively connected
	count = 0;
	for(idx=0;idx<MAX_PLAYERS;idx++){
		// count all connected players except the standalone server (if any)
		if(MULTI_CONNECTED(Net_players[idx]) && !MULTI_STANDALONE(Net_players[idx])){
			count++;
		}
	}

	return count;
}

int multi_can_message(net_player *p)
{
	int max_rank;

	// if the player is an observer of any kind, he cannot message
	if(p->flags & NETINFO_FLAG_OBSERVER){
		return 0;
	}

	switch(Netgame.options.squad_set){
	// only those of the highest rank can message
	case MSO_SQUAD_RANK:
		max_rank = multi_get_highest_rank();
		if(p->m_player->stats.rank < max_rank){
			return 0;
		}
		break;

	// only wing/team leaders can message
	case MSO_SQUAD_LEADER:
	{
		// if the player has an invalid object #
		if(p->m_player->objnum < 0){
			return 0;
		}

		// check to see if he's a wingleader
		const ship_registry_entry* ship_regp = ship_registry_get(Ships[Objects[p->m_player->objnum].instance].ship_name);

		// verify that it's valid.
		Assertion(ship_regp != nullptr, "Ship register entry is a nullptr for the player's ship.");
		if (ship_regp->p_objp()->pos_in_wing != 0)
		{
			return 0;
		}	
		break;
	}
	// anyone can end message
	case MSO_SQUAD_ANY:
		break;

	// only the host can message
	case MSO_SQUAD_HOST:
		if(!(p->flags & NETINFO_FLAG_GAME_HOST)){
			return 0;
		}
		break;
	}	
	
	return 1;
}

int multi_can_end_mission(net_player *p)
{
	int max_rank;

	// the host can _always_ unpause a game
	if(p->flags & NETINFO_FLAG_GAME_HOST){
		return 1;
	}

	switch(Netgame.options.endgame_set){
	// only those of the highest rank can end the mission
	case MSO_END_RANK:
		max_rank = multi_get_highest_rank();
		if(p->m_player->stats.rank < max_rank){
			return 0;
		}
		break;

	// only wing/team leaders can end the mission
	case MSO_END_LEADER:
	{
		// if the player has an invalid object #
		if(p->m_player->objnum < 0){
			return 0;
		}

		// check to see if he's a wingleader
		const ship_registry_entry* ship_regp = ship_registry_get(Ships[Objects[p->m_player->objnum].instance].ship_name);

		// double check that the entry is valid.
		Assertion(ship_regp != nullptr, "Ship register entry is a nullptr for the player's ship.");
		if (ship_regp->p_objp()->pos_in_wing != 0)
		{
			return 0;
		}	
		break;
	}
	// anyone can end the mission
	case MSO_END_ANY:
		break;

	// only the host can end the mission
	case MSO_END_HOST:
		if(!(p->flags & NETINFO_FLAG_GAME_HOST)){
			return 0;
		}
		break;
	}	
	
	return 1;
}

int multi_eval_join_request(join_request *jr, net_addr *addr)
{	
	int team0_avail,team1_avail;
	char knock_message[256], knock_callsign[CALLSIGN_LEN+1], jr_ip_string[INET6_ADDRSTRLEN];

	// if the server versions are incompatible
	if(jr->version < MULTI_FS_SERVER_COMPATIBLE_VERSION){
		return JOIN_DENY_JR_BAD_VERSION;
	}

	// Grab the joiner's callsign as we may need this later if they aren't accepted
	strcpy (knock_callsign, jr->callsign);

	// check to make sure we are otherwise in a state to accept
	if((Netgame.game_state != NETGAME_STATE_FORMING) &&
		((Netgame.game_state != NETGAME_STATE_IN_MISSION) || !Cmdline_ingamejoin)){

		// If the game isn't password protected pass it on that someone wants to join
		if (Netgame.mode != NG_MODE_PASSWORD ) {
			sprintf(knock_message, "%s has tried to join!", knock_callsign);
			switch(Netgame.game_state) {
				case NETGAME_STATE_BRIEFING:
				case NETGAME_STATE_PAUSED:
				case NETGAME_STATE_DEBRIEF:
				case NETGAME_STATE_MISSION_SYNC:
					send_game_chat_packet(&Net_players[MY_NET_PLAYER_NUM],knock_message,MULTI_MSG_ALL, nullptr, nullptr, 1);
					multi_display_chat_msg(knock_message,0,0);
					break;

				// in game we only bother the host. 
				case NETGAME_STATE_IN_MISSION:
					if( MULTIPLAYER_STANDALONE ) {
						send_game_chat_packet(&Net_players[MY_NET_PLAYER_NUM],knock_message,MULTI_MSG_TARGET, Netgame.host, nullptr, 1);
					} else {
						snd_play(gamesnd_get_game_sound(GameSounds::CUE_VOICE));
						HUD_sourced_printf(HUD_SOURCE_HIDDEN, "%s", knock_message);
					}
					break;
			}
		}

		return JOIN_DENY_JR_STATE;
	}

	// the standalone has some oddball situations which we must handle separately
	if (Game_mode & GM_STANDALONE_SERVER) {		
		// if this is the first connection, he will be the host so we must always accept him
		if(multi_num_players() == 0){
			// check to see if this is a tracker game, and if so make sure this is a valid MT player	
			// we probably eventually want to make sure he's not passing us a fake tracker id#
			if (MULTI_IS_TRACKER_GAME) {
				if (jr->tracker_id < 0) {
					return JOIN_DENY_JR_TRACKER_INVAL; 
				}			
			}

			// if we're password protected		
			if(std_is_host_passwd() && strcmp(jr->passwd, Multi_options_g.std_passwd) != 0){
				return JOIN_DENY_JR_PASSWD;
			}
				
			// don't allow the host to join as an observer
			if(jr->flags & JOIN_FLAG_AS_OBSERVER){
				return JOIN_DENY_JR_NOOBS;
			} else {
				return -1;
			}
		}		
	}

	// first off check to see if we're violating any of our max players/observers/connections boundaries	
		// if we've already got the full 16 (MAX_PLAYERS) connections - yow
	if( (multi_num_connections() >= MULTI_MAX_CONNECTIONS) ||			
		// if we're full of observers and this guy wants to be an observer
		((multi_num_observers() >= MAX_OBSERVERS) && (jr->flags & JOIN_FLAG_AS_OBSERVER)) ||
		// if we're up to MULTI_MAX_PLAYERS-1 and we're on the standalone
		((multi_num_players() >= (MULTI_MAX_PLAYERS - 1)) && (Game_mode & GM_STANDALONE_SERVER)) ||
		// if we're up to MULTI_MAX_PLAYERS
		(multi_num_players() >= MULTI_MAX_PLAYERS) ||
		// if the max players for a standalone was set
		((Multi_options_g.std_max_players != -1) && (multi_num_players() >= Multi_options_g.std_max_players)) ){

		// we're full buddy - sorry
		return JOIN_DENY_JR_FULL;
	}

	// check to see if this is a tracker game, and if so make sure this is a valid MT player	
	// we probably eventually want to make sure he's not passing us a fake tracker id#
	if (MULTI_IS_TRACKER_GAME) {
		if (jr->tracker_id < 0){
			return JOIN_DENY_JR_TRACKER_INVAL;
		}			
	}

	// check to see if the player is trying to ingame join in a closed game
	if(MULTI_IN_MISSION && (Netgame.mode == NG_MODE_CLOSED)){
		return JOIN_DENY_JR_CLOSED;
	}	

	// check to see if the player has passed a valid password in a password protected game
	if((Netgame.mode == NG_MODE_PASSWORD) && strcmp(Netgame.passwd,jr->passwd) != 0){
		return JOIN_DENY_JR_PASSWD;
	}

	// check to see if the netgame is forming and is temporarily marked as closed
	if((Netgame.game_state == NETGAME_STATE_FORMING) && (Netgame.flags & NG_FLAG_TEMP_CLOSED)){
		return JOIN_DENY_JR_TEMP_CLOSED;
	}	

	// check to make sure he meets the rank requirement
	if((Netgame.mode == NG_MODE_RANK_ABOVE) && (jr->player_rank < Netgame.rank_base)){
		return JOIN_DENY_JR_RANK_LOW;
	}

	// check to make sure he meets the rank requirement
	if((Netgame.mode == NG_MODE_RANK_BELOW) && (jr->player_rank > Netgame.rank_base)){
		return JOIN_DENY_JR_RANK_HIGH;
	}	

	// can't ingame join a non-dogfight game
/*	if((Netgame.game_state != NETGAME_STATE_FORMING) && !(Netgame.type_flags & NG_TYPE_DOGFIGHT)){
		return JOIN_DENY_JR_TYPE;
	}	*/

	// can't ingame join a squadwar match
	if ( (Netgame.game_state != NETGAME_STATE_FORMING) && (Netgame.type_flags & NG_TYPE_SW) ) {
		return JOIN_DENY_JR_TYPE;
	}

	// if the player was banned by the standalone
	if ( (Game_mode & GM_STANDALONE_SERVER) && std_player_is_banned(jr->callsign) ) {
		// maybe we should log this
		sprintf(knock_message, "Banned user %s with IP: %s attempted to join server", knock_callsign, psnet_addr_to_string(addr, jr_ip_string, sizeof(jr_ip_string)));
		ml_string(knock_message);
		return JOIN_DENY_JR_BANNED;
	}

	// if the game is in-mission, make sure there are ships available
	if(MULTI_IN_MISSION && !(jr->flags & JOIN_FLAG_AS_OBSERVER)){
		team0_avail = 0;
		team1_avail = 0;
		multi_player_ships_available(&team0_avail,&team1_avail);

		// if there are no ships available on either team
		if((team0_avail == 0) && (team1_avail == 0)){
			return JOIN_DENY_JR_FULL;
		}
	}

	// if my ingame joining flag is set, then deny since we only allow one ingame joiner at a time
	if ( Netgame.flags & NG_FLAG_INGAME_JOINING ){
		return JOIN_DENY_JR_INGAME_JOIN;
	}

	// check to make sure the game is not full (of observers, or players, as appropriate)
	if((jr->flags & JOIN_FLAG_AS_OBSERVER)){
		if((multi_num_observers() + 1) > Netgame.options.max_observers){
			return JOIN_DENY_JR_FULL;
		}
	} 

	// if the netgame is restricted or is team vs. team
	if(Netgame.mode == NG_MODE_RESTRICTED){
		// ingame, we must query the host to see if this guy is accepted
		if(MULTI_IN_MISSION){
			return JOIN_QUERY_RESTRICTED;
		}		
	}		
	
	// check to make sure this player hasn't been kick/banned
	if(multi_kick_is_banned(addr)){
		return JOIN_DENY_JR_BANNED;
	}

	// check to make sure this player doesn't already exist
	if ( find_player(addr) >= 0 ) {
		return JOIN_DENY_JR_DUP;
	}

	return -1;
}

// Karajorma - called by any machine (client, host, server, standalone, etc) if the mission ends by any means
// other than a warpout
void multi_handle_sudden_mission_end()
{
	if (!(MULTIPLAYER_STANDALONE)) {
		multi_msg_text_flush();
	}
}

// called by any machine (client, host, server, standalone, etc), to begin warping out all player objects
void multi_warpout_all_players()
{
	int idx;

	// i'f i'm already marked as warping out, don't do this again
	if(Net_player->flags & NETINFO_FLAG_WARPING_OUT){
		return;
	}

	// stop my afterburners
	if((Player_obj != nullptr) && (Player_obj->type == OBJ_SHIP) && !(Game_mode & GM_STANDALONE_SERVER)){
		afterburners_stop( Player_obj, 1 );
	}

	// traverse through each player
	for(idx=0;idx<MAX_PLAYERS;idx++) {
		object *objp;

		// only warpout player _ships_ which are not mine
		if(MULTI_CONNECTED(Net_players[idx]) && (Net_player != &Net_players[idx]) && (Objects[Net_players[idx].m_player->objnum].type == OBJ_SHIP)){

			objp = &Objects[Net_players[idx].m_player->objnum];
			obj_set_flags( objp, objp->flags - Object::Object_Flags::Collides);
			shipfx_warpout_start( objp );
		}
	}

	// now, mark ourselves as needing to warp out
	Net_player->flags |= NETINFO_FLAG_WARPING_OUT;
	
	// if we're an observer, or we're respawning, or we can't warp out. so just jump into the debrief state
	if((Net_player->flags & NETINFO_FLAG_OBSERVER) || (Net_player->flags & NETINFO_FLAG_RESPAWNING) ||
		((Player_obj->type == OBJ_SHIP) && !(ship_can_warp_full_check(Player_ship)))){		

		multi_handle_sudden_mission_end(); 

		if(Netgame.type_flags & NG_TYPE_DOGFIGHT){
			gameseq_post_event(GS_EVENT_MULTI_DOGFIGHT_DEBRIEF);
		} else {
			gameseq_post_event(GS_EVENT_DEBRIEF);		
		}
	}
	// if we're a ship, then begin the warpout process
	else {
		// turn off collision detection for my ship
		obj_set_flags(Player_obj, Player_obj->flags - Object::Object_Flags::Collides);

		// turn off gliding too or ships can't get upt to speed
		if(object_get_gliding(Player_obj)) {
			object_set_gliding(Player_obj, false);
		}

		gameseq_post_event(GS_EVENT_PLAYER_WARPOUT_START_FORCED);				
	}
}

// determine the highest rank of any of the players in the game
int multi_get_highest_rank()
{
	int idx;
	int max_rank = -1;
	
	// go through all the players
	for(idx=0;idx<MAX_PLAYERS;idx++){
		if(MULTI_CONNECTED(Net_players[idx]) && !MULTI_STANDALONE(Net_players[idx]) && !MULTI_PERM_OBSERVER(Net_players[idx]) && (Net_players[idx].m_player->stats.rank > max_rank)){
			max_rank = Net_players[idx].m_player->stats.rank;
		}
	}

	// return what we found
	return max_rank;			
}

// called on the machine of the player who hit alt+j
void multi_handle_end_mission_request()
{
	int idx;
	
	// all clients should send the request to the server. no exceptions
	if(!(Net_player->flags & NETINFO_FLAG_AM_MASTER)){
		send_endgame_packet();
	}
	// the server of the game does some further processing
	else {
		ml_string("Server received endgame request, proceeding...");			

		// first we should toss all ingame joiners
		for(idx=0;idx<MAX_PLAYERS;idx++){
			if(MULTI_CONNECTED(Net_players[idx]) && (Net_players[idx].flags & NETINFO_FLAG_INGAME_JOIN)){
				multi_kick_player(idx,0,KICK_REASON_INGAME_ENDED);
			}
		}		
				
		// send the endgame packet to all clients, who will act on it immediately
		send_endgame_packet();			
		Netgame.game_state = NETGAME_STATE_ENDGAME;		
		send_netgame_update_packet();					
		
		if (Game_mode & GM_STANDALONE_SERVER) {					
			// move to the standalone postgame (which is where we'll handle stats packets, etc)
			gameseq_post_event(GS_EVENT_STANDALONE_POSTGAME);
		}

		// begin the warpout process for all players and myself
		multi_warpout_all_players();
	} 
}

// called to handle any special cases where a player is in some submemu when the game is ended 
void multi_handle_state_special()
{
	int stack_depth,current_depth;	
	
	// first off - kill any active popups
	popup_kill_any_active();

	// kill any popupdeads
	if(popupdead_is_active()){
		popupdead_close();
	}

	// kill off the pilot info popup if its active
	if(multi_pinfo_popup_active()){
		multi_pinfo_popup_kill();
	}

	// now do any special processing for being in states other then the gameplay states
	stack_depth = gameseq_get_depth();
	
	// if we're not pushed on top of any states, do any special state case handling here
	if(stack_depth == 0){		
		// currently there are no special cases, so return
		return;
	} 
	// if we are pushed on any states, post events to pop them off one by one
	else {
		current_depth = stack_depth;
		do {		
			switch(gameseq_get_state(stack_depth - current_depth)){				
			// the hotkey screen
			case GS_STATE_HOTKEY_SCREEN :		
				mission_hotkey_exit();
				Game_do_state_should_skip = 1;
				break;
			// the options menu
			case GS_STATE_OPTIONS_MENU:		
				options_cancel_exit();
				Game_do_state_should_skip = 1;
				break;
			// the hud config (1 deeper in the options menu)
			case GS_STATE_HUD_CONFIG:
				hud_config_cancel();			
				Game_do_state_should_skip = 1;
				break;
			// controls config (1 deeper than the options menu)
			case GS_STATE_CONTROL_CONFIG:
				control_config_cancel_exit();	
				Game_do_state_should_skip = 1;
				break;
			// mission goals screen
			case GS_STATE_SHOW_GOALS:
				mission_goal_exit();
				Game_do_state_should_skip = 1;
				break;			
			// mission log scrollback
			case GS_STATE_MISSION_LOG_SCROLLBACK:
				hud_scrollback_exit();
				Game_do_state_should_skip = 1;
				break;
			// pause screen
			case GS_STATE_MULTI_PAUSED:
				gameseq_pop_state();
				Game_do_state_should_skip = 1;
				break;
			}

			// next pushed state
			current_depth--;
		} while(current_depth > 0);	
	}
}

// called by the file xfer subsytem when we start receiving a file
void multi_file_xfer_notify(int handle)
{
	char *filename = nullptr;
	int cf_type;
	int is_mission = 0;	

	// get the filename of the file we are receiving
	filename = multi_xfer_get_filename(handle);
		
	// something is messed up
	if(filename == nullptr){
		return;
	}

	// convert the filename to all lowercase
	SCP_tolower(filename);

	// if this is a mission file
	is_mission = (strstr(filename, FS_MISSION_FILE_EXT) != nullptr);
	
	// determine where its going to go
	if(is_mission){
		cf_type = Net_player->p_info.options.flags & MLO_FLAG_XFER_MULTIDATA ? CF_TYPE_MULTI_CACHE : CF_TYPE_MISSIONS;
	} else {
		cf_type = CF_TYPE_MULTI_CACHE;
	}

	// QUICK FIX
	// check to see if the file is read-only			
	if((filename[0] != '\0') && !cf_access(filename, cf_type, 00) && (cf_access(filename, cf_type, 02) == -1)){	
		multi_xfer_xor_flags(handle, MULTI_XFER_FLAG_REJECT);

		Net_player->flags &= ~(NETINFO_FLAG_DO_NETWORKING);
		popup(PF_USE_AFFIRMATIVE_ICON, 1, XSTR("&Ok", 713), XSTR("An outdated copy of this file exists, but it cannot be overwritten by the server because it is set to be read-only. Change the permissions on this file next time.", 714));		
		multi_quit_game(PROMPT_NONE);		
		return;
	}	

	// if the incoming filename is a freespace file, set my netplayer state to be "file xfer"
	if(is_mission){
		// we'd better not be xferring a file right now
		Assert(Net_player->s_info.xfer_handle == -1);

		// force into the multidata directory
		multi_xfer_handle_force_dir(handle, cf_type);		
	
		// set my xfer handle
		Net_player->s_info.xfer_handle = handle;
		
		Net_player->state = NETPLAYER_STATE_MISSION_XFER;
		send_netplayer_update_packet();
	}
	// otherwise always hand it off to the multi_data system
	else {
		multi_data_handle_incoming(handle);		
	}
}

// return the lag/disconnected status of the game
const int MULTI_LAG_VAL = MULTI_PING_MIN_RED;
int multi_query_lag_status()
{
	// -1 == not lagged, 0 == lagged, 1 == disconnected

	// if I'm the server of the game, I can't be lagged
	if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
		return -1;
	}
	
	// if we've been disconnected for some reason or another
	if(multi_client_server_dead()){
		return 1;
	}

	// if our ping time to the server is over a certain time
	if(Netgame.server->s_info.ping.ping_avg >= MULTI_LAG_VAL){
		return 0;
	} 

	// not lagged
	return -1;
}

// process a valid join request
void multi_process_valid_join_request(join_request *jr, net_addr *who_from, int ingame_join_team)
{
	int net_player_num,player_num;
	short id_num;
	
	// create netplayer and player objects for this guy
	net_player_num = multi_find_open_netplayer_slot();
	player_num = multi_find_open_player_slot();
	id_num = multi_get_new_id();
	Assert((net_player_num != -1) && (player_num != -1));			

	// if he is requesting to join as an observer
	if(jr->flags & JOIN_FLAG_AS_OBSERVER){			
		// create the (permanently) observer player
		multi_obs_create_player(net_player_num, jr->callsign, who_from, &Players[player_num]);

		// copy his pilot image filename
		if(jr->image_filename[0] != '\0'){
			strcpy_s(Net_players[net_player_num].m_player->image_filename, jr->image_filename);
		} else {
			strcpy_s(Net_players[net_player_num].m_player->image_filename, "");
		}

		// copy his pilot squad filename
		Net_players[net_player_num].m_player->insignia_texture = -1;
		player_set_squad_bitmap(Net_players[net_player_num].m_player, jr->squad_filename, true);

		// clear his multi_data info
		multi_data_handle_join(net_player_num);

		// set some extra flags for him as appropriate
		if(MULTI_IN_MISSION){
			Net_players[net_player_num].flags |= NETINFO_FLAG_INGAME_JOIN;			
		}

		Net_players[net_player_num].flags |= NETINFO_FLAG_CONNECTED;		
		Net_players[net_player_num].player_id = id_num;
		Net_players[net_player_num].tracker_player_id = jr->tracker_id;

		// store pxo info
		if(jr->pxo_squad_name[0] != '\0'){
			strcpy_s(Net_players[net_player_num].p_info.pxo_squad_name, jr->pxo_squad_name);
		} else {
			strcpy_s(Net_players[net_player_num].p_info.pxo_squad_name, "");
		}		

		// if he's using hacked data
		if(jr->flags & JOIN_FLAG_HAXOR){
			Net_players[net_player_num].flags |= NETINFO_FLAG_HAXOR;
		}

		// set his reliable connect time
		Net_players[net_player_num].s_info.reliable_connect_time = time(nullptr);

		// send the accept packet here
		send_accept_packet(net_player_num, (Net_players[net_player_num].flags & NETINFO_FLAG_INGAME_JOIN) ? ACCEPT_OBSERVER | ACCEPT_INGAME : ACCEPT_OBSERVER);
	} else {
		// create the player object	
		multi_create_player(net_player_num, &Players[player_num], jr->callsign, who_from, -1, id_num);
		
		// copy his pilot image filename
		if(jr->image_filename[0] != '\0'){
			strcpy_s(Net_players[net_player_num].m_player->image_filename, jr->image_filename);
		} else {
			strcpy_s(Net_players[net_player_num].m_player->image_filename, "");
		}

		// copy his pilot squad filename		
		Net_players[net_player_num].m_player->insignia_texture = -1;
		player_set_squad_bitmap(Net_players[net_player_num].m_player, jr->squad_filename, true);

		// clear his multi_data info
		multi_data_handle_join(net_player_num);

		// mark him as being connected
		Net_players[net_player_num].flags |= NETINFO_FLAG_CONNECTED;
						
		// set his tracker id correctly
		Net_players[net_player_num].tracker_player_id = jr->tracker_id;				

		// set his player id#
		Net_players[net_player_num].player_id = id_num;

		// store pxo info
		if(jr->pxo_squad_name[0] != '\0'){
			strcpy_s(Net_players[net_player_num].p_info.pxo_squad_name, jr->pxo_squad_name);
		} else {
			strcpy_s(Net_players[net_player_num].p_info.pxo_squad_name, "");
		}		

		// if he's using hacked data
		if(jr->flags & JOIN_FLAG_HAXOR){
			Net_players[net_player_num].flags |= NETINFO_FLAG_HAXOR;
		}
		
		// flag him appropriately if he's doing an ingame join
		if(MULTI_IN_MISSION){
			Net_players[net_player_num].flags |= NETINFO_FLAG_INGAME_JOIN;
			Net_players[net_player_num].s_info.ingame_join_flags = 0;
		}		

		// set his reliable connect time
		Net_players[net_player_num].s_info.reliable_connect_time = time(nullptr);

		// if he's joining as a host (on the standalone)
		if(Net_players[net_player_num].flags & NETINFO_FLAG_GAME_HOST){
			send_accept_packet(net_player_num, ACCEPT_HOST);

			Netgame.host = &Net_players[net_player_num];

			// set the game and player states appropriately
			Netgame.game_state = NETGAME_STATE_STD_HOST_SETUP;			
		}
		// if he's joining ingame
		else if(Net_players[net_player_num].flags & NETINFO_FLAG_INGAME_JOIN){
			// if we're in team vs. team mode
			if(Netgame.type_flags & NG_TYPE_TEAM)
			{
			/*	int i, j;
				int team_nums[MULTI_TS_MAX_TVT_TEAMS] = {0, 0};\

				//First get the number of players on each team
				for(i = 0; i < MULTI_TS_MAX_TVT_TEAMS; i++)
				{
					for(j = 0; j < MULTI_TS_NUM_SHIP_SLOTS; j++)
					{
						if(Multi_ts_team[i].multi_ts_flag != MULTI_TS_FLAG_EMPTY && Multi_ts_team[i].multi_ts_flag != MULTI_TS_FLAG_NONE)
						{
							team_nums[i]++;
						}
					}
				}
				//Find the lowest team
				//Init this to the first team, so it works properly
				int lowest_team[2] = {team_nums[0], 0};
				for(i = 0; i < MULTI_TS_MAX_TVT_TEAMS;i++)
				{
					if(Multi_ts_team[i] < lowest_team[0])
					{
						lowest_team[0] Multi_ts_team[i];
						lowest_team[1] = i;
					}
				}
				
				ingame_join_team = lowest_team[1];*/
				//Assert(ingame_join_team != -1);

				Net_players[net_player_num].p_info.team = ingame_join_team;
			}

			send_accept_packet(net_player_num, ACCEPT_INGAME, ingame_join_team);

			// set his last full update time for updating him on ingame join ships
			Net_players[net_player_num].s_info.last_full_update_time = ui_timestamp(INGAME_SHIP_UPDATE_TIME);
		} 
		// if he's joining as an otherwise ordinary client
		else {
			send_accept_packet(net_player_num, ACCEPT_CLIENT);
		}
	}

	// set my ingame joining flag if the new guy is joining ingame
	if ( Net_players[net_player_num].flags & NETINFO_FLAG_INGAME_JOIN ){
		Netgame.flags |= NG_FLAG_INGAME_JOINING;
	}	
	
	// copy in his options
	memcpy(&Net_players[net_player_num].p_info.options, &jr->player_options, sizeof(multi_local_options));

	// if on the standalone, then do any necessary gui updating
	if (Game_mode & GM_STANDALONE_SERVER) {		
		std_add_player(&Net_players[net_player_num]);
		std_connect_set_connect_count();
		std_connect_set_host_connect_status();
	} else {
		// let the create game screen know someone has joined
		if(gameseq_get_state() == GS_STATE_MULTI_HOST_SETUP){
			multi_create_handle_join(&Net_players[net_player_num]);
		}
	}

	extern UI_TIMESTAMP Multi_client_update_times[MAX_PLAYERS];	// NOLINT
	Multi_client_update_times[net_player_num] = UI_TIMESTAMP::invalid();

	// notify datarate
	multi_rate_reset(net_player_num);
}

// if a player is trying to join a restricted game, evaluate the keypress (accept or not, etc)
int multi_process_restricted_keys(int k)
{	
	int key1=-1,key2=-1;	//JAS: Get rid of optimized warning
	int team_val;
	
	// if the query timestamp is not set, don't do anything
	if ( !Multi_restr_query_timestamp.isValid() ) {
		return 0;
	}

	// determine what keys to look for based upon the mode we're in
	switch(Multi_join_restr_mode){
	// normal restricted join, Y or N
	case MULTI_JOIN_RESTR_MODE_1:
		key1 = KEY_Y;
		key2 = KEY_N;
		break;

	// team vs team, team 0 only has ships
	case MULTI_JOIN_RESTR_MODE_2:
		key1 = KEY_Y;
		key2 = KEY_N;
		break;

	// team vs team, team 1 only has ships		
	case MULTI_JOIN_RESTR_MODE_3:
		key1 = KEY_Y;
		key2 = KEY_N;
		break;

	// team vs team, both teams have ships
	case MULTI_JOIN_RESTR_MODE_4:
		key1 = KEY_1;
		key2 = KEY_2;
		break;
	
	// illegal mode
	default :
		Error(LOCATION, "An invalid value for Multi_join_restr_mode was set, probably by a corrupted packet or by some other packet error.");
	}	

	// check the keypress
	if((k == key1) || (k == key2)){
		// unset the timestamp
		Multi_restr_query_timestamp = UI_TIMESTAMP::invalid();

		// MWA -- 5/26/98.  Next line commented out.  It should be cleared when the ingame joiner
		// actually gets into the mission
		//Netgame.flags &= ~(NG_FLAG_INGAME_JOINING);

		// determine which team to put him on (if any)
		switch(Multi_join_restr_mode){
		// normal restricted join, Y or N
		case MULTI_JOIN_RESTR_MODE_1:
			team_val = (k == key1) ? 0 : -1;
			break;

		// team vs team, team 0 only has ships
		case MULTI_JOIN_RESTR_MODE_2:
			team_val = (k == key1) ? 0 : -1;			
			break;

		// team vs team, team 1 only has ships		
		case MULTI_JOIN_RESTR_MODE_3:
			team_val = (k == key1) ? 1 : -1;			
			break;

		// team vs team, both teams have ships
		case MULTI_JOIN_RESTR_MODE_4:
			team_val = (k == key1) ? 0 : 1;			
			break;
	
		// illegal mode
		default :
			team_val = -1;	// JAS: Get rid of optimized warning
		}				

		// perform the proper response	
		if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
			if(team_val >= 0){			
				multi_process_valid_join_request(&Multi_restr_join_request,&Multi_restr_addr,team_val);			
			}
		}
		// otherwise tell the standalone to accept him
		else {
			if(team_val >= 0){
				send_host_restr_packet("null",1,team_val);
			} else {
				send_host_restr_packet("null",2,-1);
			}
		}

		// processed a key
		return 1;
	}
	
	// didn't process any keys
	return 0;
}

// determine the status of available player ships (use team_0 for non team vs. team situations)
void multi_player_ships_available(int *team_0,int *team_1)
{
	int mp_team_num;
	
	*team_0 = 0;
	*team_1 = 0;

	for (auto moveup: list_range(&Ship_obj_list))
	{
		if (Objects[moveup->objnum].flags[Object::Object_Flags::Should_be_dead])
			continue;

		// if this ship is flagged as OF_COULD_BE_PLAYER
		if(Objects[moveup->objnum].flags[Object::Object_Flags::Could_be_player]){
			// get the team # for this ship
			mp_team_num = multi_ts_get_team(Ships[Objects[moveup->objnum].instance].ship_name);
			if(mp_team_num == 0){
				(*team_0)++;
			} else if(mp_team_num == 1){
				(*team_1)++;
			}
		}
	}	
}

// server should update the player's bank/link status with the data in the passed ship
void multi_server_update_player_weapons(net_player *pl,ship *shipp)
{
	// don't process when the ship is dying.
	if ( (shipp->flags[Ship::Ship_Flags::Dying]) || NETPLAYER_IS_DEAD(pl) )
		return;

	// primary bank status
	pl->s_info.cur_primary_bank = (char)shipp->weapons.current_primary_bank;

	// primary link status
	pl->s_info.cur_link_status &= ~(1<<0);
	if(shipp->flags[Ship::Ship_Flags::Primary_linked]){
		pl->s_info.cur_link_status |= (1<<0);
	}

	// secondary bank status
	if ( shipp->weapons.current_secondary_bank < 0 ) {
		nprintf(("Network", "bashing %s's current sbank to 0\n", shipp->ship_name));
		shipp->weapons.current_secondary_bank = 0;
	}
	pl->s_info.cur_secondary_bank = (char)shipp->weapons.current_secondary_bank;

	// secondary link status
	pl->s_info.cur_link_status &= ~(1<<1);
	if(shipp->flags[Ship::Ship_Flags::Secondary_dual_fire]){
		pl->s_info.cur_link_status |= (1<<1);
	}

	// ets values
	pl->s_info.ship_ets = 0x0000;
	// shield ets		
	pl->s_info.ship_ets |= ((ushort)shipp->shield_recharge_index << 8);
	// weapon ets
	pl->s_info.ship_ets |= ((ushort)shipp->weapon_recharge_index << 4);
	// engine ets
	pl->s_info.ship_ets |= ((ushort)shipp->engine_recharge_index);

	Assert( pl->s_info.ship_ets != 0 );
}

// flush the multidata cache directory
void multi_flush_multidata_cache()
{
	nprintf(("Network","FLUSHING MULTIDATA CACHE\n"));
	
	// call the cfile function to flush the directory
	cfile_flush_dir(CF_TYPE_MULTI_CACHE);
}

// flush all data from a previous mission before starting the next
void multi_flush_mission_stuff()
{
	int idx;
	
	for(idx=0;idx<MAX_PLAYERS;idx++){
		if(MULTI_CONNECTED(Net_players[idx])){			
			// unset all unneeded status bits
			Net_players[idx].flags &= ~(NETINFO_FLAG_MISSION_OK | NETINFO_FLAG_RESPAWNING | NETINFO_FLAG_WARPING_OUT);
			
			// server is always "mission ok"
			if(Net_players[idx].flags & NETINFO_FLAG_AM_MASTER){
				Net_players[idx].flags |= NETINFO_FLAG_MISSION_OK;
			}

			// if this guy is a non-permanent observer, unset the appropriate flags
			if(MULTI_TEMP_OBSERVER(Net_players[idx])){
				Net_players[idx].flags &= ~(NETINFO_FLAG_OBSERVER | NETINFO_FLAG_OBS_PLAYER);
			}

			// misc
			multi_ping_reset(&Net_players[idx].s_info.ping);				
			Net_players[idx].s_info.num_last_buttons = 0;
			Net_players[idx].s_info.wing_index_backup = 0;
			Net_players[idx].s_info.wing_index = 0;
			Net_players[idx].p_info.ship_class = -1;
			Net_players[idx].p_info.ship_index = -1;
			Net_players[idx].s_info.xfer_handle = -1;

			// ack handles
			Net_players[idx].s_info.wing_index_backup = 0;
				
			// objnum 
			Players[idx].objnum = -1;
		}
	}	

	// reset netgame stuff
	Netgame.flags &= ~(NG_FLAG_TEMP_CLOSED);		

	multi_xfer_reset();

	// standalone servers should clear their goal trees now
	if (Game_mode & GM_STANDALONE_SERVER) {
		std_multi_setup_goal_tree();
	}
	
	// object signatures
	// this will eventually get reset to Netgame.security the next time an object gets its signature assigned.
	// We do this to resynchronize the host/server and all clients
	Next_ship_signature = SHIP_SIG_MIN;
	Next_asteroid_signature = ASTEROID_SIG_MIN;
	Next_non_perm_signature = NPERM_SIG_MIN;

	// everyone will need to either reload the current mission, leave, or load the next mission, so in any case
	Multi_mission_loaded = 0;
}

// should we ignore all controls and keypresses because of some multiplayer 
int multi_ignore_controls(int key)
{		
	// if the multiplayer text messaging system is active, don't return any keys	
	if((key > 0) && multi_msg_text_process(key)){
		return 1;
	}

	// if the host of the game is being prompted to accept or deny a player in a restricted game
	if((key > 0) && multi_process_restricted_keys(key)){
		return 1;
	}
	
	// if we're in text messaging mode, ignore controls
	if(multi_msg_text_mode()){
		return 1;
	}	

	// if the pause system wants to eat keys for a while
	if(multi_pause_eat_keys()){
		return 1;
	}

	// multiplayer didn't eat the key
	return 0;
}

// if the kill limit has been reached by any given player
int multi_kill_limit_reached()
{
	int idx;

	// is the kill limit <= 0 ?
	// if so, consider it as _no_ kill limit
	if(Netgame.options.kill_limit <= 0){
		return 0;
	}
	
	// look through all active, non-observer players
	for(idx=0;idx<MAX_PLAYERS;idx++){
		if(MULTI_CONNECTED(Net_players[idx]) && !MULTI_STANDALONE(Net_players[idx]) && !MULTI_OBSERVER(Net_players[idx]) && (Net_players[idx].m_player->stats.m_kill_count_ok >= Netgame.options.kill_limit)){
			// someone reached the limit
			return 1;
		}
	}

	// limit has not been reached yet
	return 0;
}

// display a chat message (write to the correct spot - hud, standalone gui, chatbox, etc)
void multi_display_chat_msg(const char *msg, int player_index, int add_id)
{
	// if i'm a standalone, always add to the gui
	if (Game_mode & GM_STANDALONE_SERVER) {
		std_add_chat_text(msg,player_index,add_id);
		return;
	}
	
	// in gameplay
	if(Game_mode & GM_IN_MISSION){					
		// if we're paused, send it to the chatbox
		if(Multi_pause_status){
			chatbox_add_line(msg, player_index, add_id);
		}
		// otherwise print to the HUD
		else {
			multi_msg_display_mission_text(msg, player_index);
		}
	}
	// otherwise add it to the chatbox
	else {
		chatbox_add_line(msg, player_index, add_id);
	}		
}

// fill in Current_file_checksum and Current_file_length
void multi_get_mission_checksum(const char *filename)
{
	CFILE *in;

	Multi_current_file_checksum = 0xffff;
	Multi_current_file_length = -1;

	// get the filename
	in = cfopen(filename,"rb");
	if(in != nullptr){
		// get the length of the file
		Multi_current_file_length = cfilelength(in);
		cfclose(in);

		in = cfopen(filename,"rb");
		if(in != nullptr){
			// get the checksum of the file
			cf_chksum_short(in,&Multi_current_file_checksum);

			// close the file
			cfclose(in);
			in = nullptr;
		}
		// if the file doesn't exist, setup some special values, so the server recognizes this
		else {
			Multi_current_file_checksum = 0xffff;
			Multi_current_file_length = -1;
		}
	} else {
		// don't transfew builtin missions
		if(multi_is_builtin_mission()){	
			multi_quit_game(PROMPT_ALL, MULTI_END_NOTIFY_KICKED_CANT_XFER);
		}
	}
	nprintf(("Network","NET FILE CHECKSUM : %d %d\n",Multi_current_file_checksum,Multi_current_file_length));
}

char multi_unit_to_char(float unit)
{
	Assertion((unit > 1.0f) && (unit < -1.0f), "Newly implemented function multi_unit_to_char() was passed a value %f, that it cannot handle.", unit);
	char ret;
	
	if(unit > 1.0f){
		unit = 1.0f;
	}
	if(unit < -1.0f){
		unit = -1.0f;
	}

	ret = (char)(unit * 127.0f);
	return ret;
}

float multi_char_to_unit(float val)
{
	Assertion((val > 127.0f) && (val < -127.0f), "Newly implemented function multi_char_to_unit() was passed a value %f, that it cannot handle.", val);
	float ret;

	ret = (float)val / 127.0f;
	if(ret > 1.0f){
		ret = 1.0f;
	}
	if(ret < -1.0f){
		ret = -1.0f;
	}

	return ret;
}

// if we should render our ping time to the server in a multiplayer game
int multi_show_ingame_ping()
{
	// always show it for now
	return 1;
}

int multi_get_connection_speed()
{
	int cspeed;
	const char *connection_speed;

	connection_speed = os_config_read_string(nullptr, "ConnectionSpeed", "Fast");

	if ( !stricmp(connection_speed, NOX("Slow")) ) {
		cspeed = CONNECTION_SPEED_288;
	} else if ( !stricmp(connection_speed, NOX("56K")) ) {
		cspeed = CONNECTION_SPEED_56K;
	} else if ( !stricmp(connection_speed, NOX("ISDN")) ) {
		cspeed = CONNECTION_SPEED_SISDN;
	} else if ( !stricmp(connection_speed, NOX("Cable")) ) {
		cspeed = CONNECTION_SPEED_CABLE;
	} else if ( !stricmp(connection_speed, NOX("Fast")) ) {
		cspeed = CONNECTION_SPEED_T1;
	} else if (!stricmp(connection_speed, NOX("None"))) {
		cspeed = CONNECTION_SPEED_T1;	// default to Fast, per the os_config_read_string() call; per #define in multi.h, None doesn't really mean anything
	} else {
		cspeed = CONNECTION_SPEED_NONE;	// this will now no longer be returned unless the connection speed string is invalid
	}

	return cspeed;
}

// return a MVALID_STATUS_* define based upon the passed string
int multi_string_to_status(char *valid_string)
{
	if (strstr(valid_string, "invalid"))
		return MVALID_STATUS_INVALID;

	if (strstr(valid_string, "valid"))
		return MVALID_STATUS_VALID;


	return MVALID_STATUS_UNKNOWN;	
}

// if we're in tracker mode, do a validation update on all known missions
void multi_update_valid_missions()
{
	char next_filename[MAX_FILENAME_LEN+1];	
	char next_line[512];
	char status_string[50];
	char temp[256];
	char *tok;
	CFILE *in;
	int file_index;
	uint idx;	
	bool was_cancelled = false;

	// if we're a standalone, show a dialog saying "validating missions"
	if (Game_mode & GM_STANDALONE_SERVER) {
		std_create_gen_dialog("Validating missions");
		std_gen_set_text("Querying:", 1);
		mprintf(("Standalone: Validating missions\n"));
	}

	// mark all missions on our list as being MVALID_STATUS_UNKNOWN
	for (idx = 0; idx < Multi_create_mission_list.size(); idx++) {
		Multi_create_mission_list[idx].valid_status = MVALID_STATUS_UNKNOWN;
	}
	
	// attempt to open the valid mission config file
	in = cfopen(MULTI_VALID_MISSION_FILE, "rt", CF_TYPE_DATA);

	if (in != nullptr) {
		// read in all listed missions
		while ( !cfeof(in) ) {
			// read in a line
			memset(next_line, 0, 512);
			cfgets(next_line, 512, in);
			drop_trailing_white_space(next_line);
			drop_leading_white_space(next_line);

			// read in a filename
			memset(next_filename, 0, MAX_FILENAME_LEN+1);
			memset(temp, 0, 256);
			tok = strtok(next_line, " ");

			if (tok == nullptr)
				continue;

			strcpy_s(temp, tok);
			drop_trailing_white_space(temp);
			drop_leading_white_space(temp);
			strcpy_s(next_filename, temp);
			
			// read in the status string
			memset(status_string, 0, 50);
			memset(temp, 0, 256);
			tok = strtok(nullptr," \n");

			if (tok == nullptr)
				continue;

			strcpy_s(temp, tok);
			drop_trailing_white_space(temp);
			drop_leading_white_space(temp);
			strcpy_s(status_string, temp);

			// try and find the file
			file_index = multi_create_lookup_mission(next_filename);
	
			if (file_index >= 0)
				Multi_create_mission_list[file_index].valid_status = (char)multi_string_to_status(status_string);
		}

		// close the infile
		cfclose(in);
		in = nullptr;
	}

	// now poll for all unknown missions
	was_cancelled = false;

	if ( !(Game_mode & GM_STANDALONE_SERVER) ) {
		popup_conditional_create(0, XSTR("&Cancel", 667), XSTR("Validating missions ...", -1));
	}

	was_cancelled = !multi_fs_tracker_validate_mission_list(Multi_create_mission_list);

	if ( !(Game_mode & GM_STANDALONE_SERVER) ) {
		popup_conditional_close();
	}

	// if the operation was cancelled, don't write anything new
	if (was_cancelled) {
		// if we're a standalone, kill the validate dialog
		if(Game_mode & GM_STANDALONE_SERVER){
			std_destroy_gen_dialog();
		}

		return;
	}

	// now rewrite the outfile with the new mission info
	in = cfopen(MULTI_VALID_MISSION_FILE, "wt", CF_TYPE_DATA);
	if(in == nullptr){
		// if we're a standalone, kill the validate dialog
		if(Game_mode & GM_STANDALONE_SERVER){
			std_destroy_gen_dialog();
		}

		return;
	}

	for (idx = 0; idx < Multi_create_mission_list.size(); idx++) {
		switch(Multi_create_mission_list[idx].valid_status){
		case MVALID_STATUS_VALID:
			cfputs(Multi_create_mission_list[idx].filename, in);
			cfputs(NOX("   valid"), in);
			cfputs(NOX("\n"), in);
			break;

		case MVALID_STATUS_INVALID:
			cfputs(Multi_create_mission_list[idx].filename, in);
			cfputs(NOX("   invalid"), in);
			cfputs(NOX("\n"), in);
			break;
		}
	}

	// close the outfile
	cfclose(in);
	in = nullptr;

	// if we're a standalone, kill the validate dialog
	if (Game_mode & GM_STANDALONE_SERVER) {
		std_destroy_gen_dialog();
	}
}

// get a new id# for a player
short multi_get_new_id()
{
	if(Multi_id_num > 20000){
		Multi_id_num = 0;
	} 

	return Multi_id_num++;
}


// ------------------------------------

//XSTR:OFF
DCF(multi,"changes multiplayer settings (Multiplayer)")
{
	if (dc_optional_string("kick")) {
		// kick a player
		multi_dcf_kick();

#ifndef NDEBUG
	} else if (dc_optional_string("stats")) {
		// multi_toggle_stats();

	} else if (dc_optional_string("show_stats")) {
		// multi_show_basic_stats(0);

	} else if (dc_optional_string("dump_stats")) {
		// multi_show_basic_stats(1);
#endif

	} else if (dc_optional_string("voice")) {
		// settings for multiplayer voice
		multi_voice_dcf();

	} else if (dc_optional_string("respawn_chump")){
		// set a really large # of respawns
		if((Net_player != nullptr) && (Net_player->flags & NETINFO_FLAG_GAME_HOST)) {
			Netgame.respawn = 9999;
			Netgame.options.respawn = 9999;

			// if i'm the server, send a netgame update
			if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
				send_netgame_update_packet();
			} 
		}

	} else if (dc_optional_string("ss_leaders")) {
		// only host or team captains can modify ships
		if((Net_player != nullptr) && (Net_player->flags & NETINFO_FLAG_GAME_HOST)) {
			Netgame.options.flags |= MSO_FLAG_SS_LEADERS;
			multi_options_update_netgame();
		}

	} else if (dc_optional_string("make_players")) {
#ifndef NDEBUG
		multi_make_fake_players(MAX_PLAYERS);
#endif

	} else if (dc_optional_string("oo")) {
		int new_flags;

		if(!dc_maybe_stuff_int(&new_flags))
			new_flags = -1;

		dc_printf("Interesting flags\n");
		dc_printf("Pos : %d\n", 1 << 0);
		dc_printf("Velocity    : %d\n", 1 << 7);
		dc_printf("Desired vel : %d\n", 1 << 8);
		dc_printf("Orient : %d\n", 1 << 1);
		dc_printf("Rotvel : %d\n", 1 << 9);
		dc_printf("Desired rotvel : %d\n", 1 << 10);

	} else if (dc_optional_string("oo_sort")) {
		extern int OO_sort;

		OO_sort = !OO_sort;
		dc_printf("Network object sorting %s\n", OO_sort ? "ENABLED" : "DISABLED");
	}
}

//XSTR:ON

// PXO crc checking stuff
#ifndef NDEBUG

void multi_spew_pxo_checksums(int max_files, char *outfile)
{
	char **file_names;
	char full_name[MAX_FILENAME_LEN+1];
	char wild_card[6];
	int count = 0, idx;
	uint checksum;
	FILE *out;

	// allocate filename space
	file_names = (char**)vm_malloc(sizeof(char*) * max_files);
	if (file_names != nullptr) {
		SDL_snprintf(wild_card, SDL_arraysize(wild_card), "*%s", FS_MISSION_FILE_EXT);
		count = cf_get_file_list(max_files, file_names, CF_TYPE_MISSIONS, wild_card);

		// open the outfile
		out = fopen(outfile, "wt");

		if (out != nullptr) {
			// do all the checksums
			for (idx = 0; idx < count; idx++) {
				memset(full_name, 0, MAX_FILENAME_LEN+1);
				SDL_strlcpy(full_name, cf_add_ext(file_names[idx], FS_MISSION_FILE_EXT), SDL_arraysize(full_name));

				if (cf_chksum_long(full_name, &checksum)) {
					fprintf(out, "%s	:	%d\n", full_name, (int)checksum);
				}
			}

			fclose(out);
		}

		for (idx = 0; idx < count; ++idx) {
			if (file_names[idx] != nullptr) {
				vm_free(file_names[idx]);
				file_names[idx] = nullptr;
			}
		}

		vm_free(file_names);
		file_names = nullptr;
	}
}

DCF(pxospew,"spew PXO 32 bit checksums for all visible mission files (Multiplayer)")
{
	int max_files;
	char file_str[MAX_NAME_LEN];

	if (dc_optional_string_either("help", "--help")) {
		dc_printf("Usage: pxospew <max_files> <filename>\n");
		return;
	}

	dc_stuff_int(&max_files);
	dc_stuff_string_white(file_str, MAX_NAME_LEN);

	multi_spew_pxo_checksums(max_files, file_str);
}

#endif

// make a bunch of fake players - don't rely on this to be very safe - its mostly used for interface testing
#ifndef NDEBUG
void multi_make_fake_players(int count)
{
	int idx;
	
	for(idx=0;idx<count;idx++){
		if(!MULTI_CONNECTED(Net_players[idx])){
			Net_players[idx].m_player = &Players[idx];
			sprintf(Net_players[idx].m_player->callsign,"Player %d",idx);
			Net_players[idx].flags |= NETINFO_FLAG_CONNECTED;
		}
	}
}
#endif

// ---------------------------------------------------------------------------------------------------------------------
// PACK UNPACK STUFF
//

#ifdef _MSC_VER
#pragma optimize("", off)
#endif

typedef struct bitbuffer {
	ubyte		mask;
   int		rack;
	ubyte		*data;
	ubyte		*org_data;
} bitbuffer;

void bitbuffer_init( bitbuffer *bitbuf, ubyte *data )
{
	bitbuf->rack = 0;	
	bitbuf->mask = 0x80;
	bitbuf->data = data;
	bitbuf->org_data = data;
}

int bitbuffer_write_flush( bitbuffer *bitbuf )
{
	// Flush to next byte
	if ( bitbuf->mask != 0x80 )	{
   	*bitbuf->data++ = (ubyte)bitbuf->rack;
	}
	return (int)(bitbuf->data-bitbuf->org_data);
}

int bitbuffer_read_flush( bitbuffer *bitbuf )
{
	return (int)(bitbuf->data-bitbuf->org_data);
}

void bitbuffer_put( bitbuffer *bitbuf, uint data, int bit_count ) 
{
	uint mask;

	mask = 1U << ( bit_count - 1 );
	while ( mask != 0) {
		if ( mask & data )	{
			bitbuf->rack |= bitbuf->mask;
		}
		bitbuf->mask >>= 1;
		if ( bitbuf->mask == 0 ) {
			*bitbuf->data++=(ubyte)bitbuf->rack;
			bitbuf->rack = 0;
			bitbuf->mask = 0x80;
		}
		mask >>= 1;
	}
}

uint bitbuffer_get_unsigned( bitbuffer *bitbuf, int bit_count ) 
{
	uint local_mask;
	uint return_value;

	local_mask = 1U << ( bit_count - 1 );
	return_value = 0;

	while ( local_mask != 0)	{
		if ( bitbuf->mask == 0x80 ) {
			bitbuf->rack = *bitbuf->data++;
		}
		if ( bitbuf->rack & bitbuf->mask )	{
			return_value |= local_mask;
		}
		local_mask >>= 1;
		bitbuf->mask >>= 1;
		if ( bitbuf->mask == 0 )	{
			bitbuf->mask = 0x80;
		}
	}

	return return_value;
}

int bitbuffer_get_signed( bitbuffer *bitbuf, int bit_count ) 
{
	uint local_mask;
	uint return_value;

	local_mask = 1U << ( bit_count - 1 );
	return_value = 0;
	while ( local_mask != 0)	{
		if ( bitbuf->mask == 0x80 ) {
			bitbuf->rack = *bitbuf->data++;
		}
		if ( bitbuf->rack & bitbuf->mask )	{
			return_value |= local_mask;
		}
		local_mask >>= 1;
		bitbuf->mask >>= 1;
		if ( bitbuf->mask == 0 )	{
			bitbuf->mask = 0x80;
		}
	}

	// sign extend return value
	return_value <<= (32-bit_count);
	
	return ((int)return_value)>>(32-bit_count);
}
	


// Packs/unpacks an object position.
// Returns number of bytes read or written.
// Cyborg17 This packer saves 2 bytes over sending the whole vector.  
// It now has a maximum effective range of ~130k in the x and z and ~65K in the y
int multi_pack_unpack_position( int write, ubyte *data, vec3d *pos)
{
	bitbuffer buf;

	bitbuffer_init(&buf,data);

	int a, b, c;

	if ( write )	{

		// Output pos
		a = (int)round(pos->xyz.x*512.0f);
		b = (int)round(pos->xyz.y*512.0f); 
		c = (int)round(pos->xyz.z*512.0f);
		CAP(a, -67108864, 67108863);		
		CAP(b, -33554432, 33554431);		
		CAP(c, -67108864, 67108863);		
		
		bitbuffer_put( &buf, (uint)a, 27 );
		bitbuffer_put( &buf, (uint)b, 26 ); // Cyborg17 this is set to 26 bits on purpose.			
		bitbuffer_put( &buf, (uint)c, 27 );

		return bitbuffer_write_flush(&buf);

	} else {

		// unpack pos
		a = bitbuffer_get_signed(&buf,27);
		b = bitbuffer_get_signed(&buf,26); // Cyborg17 this is set to 26 bits on purpose.
		c = bitbuffer_get_signed(&buf,27);

		pos->xyz.x = i2fl(a)/512.0f;
		pos->xyz.y = i2fl(b)/512.0f;
		pos->xyz.z = i2fl(c)/512.0f;

		return bitbuffer_read_flush(&buf);
	}
}

// Packs/unpacks an orientation matrix.
// Returns number of bytes read or written.
// Cyborg17 - Because of testing and a bugfix from Wookiejedi, this is now used in tandem with
// vm_extract_angles_matrix() to save bandwidth. We return the raw angles by reference
// because they are also useful in rotational interpolation.
int multi_pack_unpack_orient( int write, ubyte *data, angles *angles)
{
	bitbuffer buf;

	bitbuffer_init(&buf, data);

	int a, b, c;

	// set up some constants to facilitate compression 
	const float n_scale = 32768.0f/ PI;
	const int n_min_range = -32768;
	const int n_max_range =  32767;

	if ( write )	{			
		// Subtract PI/2 because the output of vm_extract_angles_matrix is from -PI/2 to 3PI/2
		a = fl2i(round((angles->b/* - PI/2*/) * n_scale)); 
		b = fl2i(round((angles->h/* - PI/2*/) * n_scale));
		c = fl2i(round((angles->p/* - PI/2*/) * n_scale));

		CAP(a, n_min_range, n_max_range);
		CAP(b, n_min_range, n_max_range);
		CAP(c, n_min_range, n_max_range);
					
		bitbuffer_put( &buf, (uint)a, 16 );
		bitbuffer_put( &buf, (uint)b, 16 );
		bitbuffer_put( &buf, (uint)c, 16 );

		return bitbuffer_write_flush(&buf);
	} else {

		a = bitbuffer_get_signed(&buf,16);
		b = bitbuffer_get_signed(&buf,16);
		c = bitbuffer_get_signed(&buf,16);

		angles->b =/* PI/2 +*/ (i2fl(a)/n_scale);
		angles->h =/* PI/2 +*/ (i2fl(b)/n_scale);
		angles->p =/* PI/2 +*/ (i2fl(c)/n_scale);
		
		return bitbuffer_read_flush(&buf);
	}
}

// Packs/unpacks velocity
// Returns number of bytes read or written.
int multi_pack_unpack_vel( int write, ubyte *data, matrix *orient, physics_info *pi)
{
	bitbuffer buf;

	bitbuffer_init(&buf,data);

	int a, b, c;
	float r, u, f;

	if ( write )	{
		// output velocity
		r = vm_vec_dot( &orient->vec.rvec, &pi->vel );
		u = vm_vec_dot( &orient->vec.uvec, &pi->vel );
		f = vm_vec_dot( &orient->vec.fvec, &pi->vel );

		// Cyborg17 - using round here allows us keep part of the decimal accuracy that would have been dropped with just fl2i
		a = fl2i(round(r * 16.0f)); 
		b = fl2i(round(u * 16.0f));
		c = fl2i(round(f * 32.0f));
		CAP(a,-2048,2047);
		CAP(b,-2048,2047);
		CAP(c,-4096,4095);
		bitbuffer_put( &buf, (uint)a, 13 );
		bitbuffer_put( &buf, (uint)b, 13 );
		bitbuffer_put( &buf, (uint)c, 14 );

		return bitbuffer_write_flush(&buf);
	} else {
		// unpack velocity
		a = bitbuffer_get_signed(&buf,13);
		b = bitbuffer_get_signed(&buf,13);
		c = bitbuffer_get_signed(&buf,14);
		r = i2fl(a)/16.0f;
		u = i2fl(b)/16.0f;
		f = i2fl(c)/32.0f;

		// Convert into world coordinates
		vm_vec_zero(&pi->vel);
		vm_vec_scale_add2( &pi->vel, &orient->vec.rvec, r );
		vm_vec_scale_add2( &pi->vel, &orient->vec.uvec, u );
		vm_vec_scale_add2( &pi->vel, &orient->vec.fvec, f );

		return bitbuffer_read_flush(&buf);
	}
}

// Packs/unpacks rotational velocity
// Returns number of bytes read or written.
int multi_pack_unpack_rotvel( int write, ubyte *data, physics_info *pi)
{
	bitbuffer buf;

	bitbuffer_init(&buf,data);

	int a, b, c;

	if ( write )	{
		// output rotational velocity
		a = fl2i(round(pi->rotvel.xyz.x*32.0f)); 
		b = fl2i(round(pi->rotvel.xyz.y*32.0f));
		c = fl2i(round(pi->rotvel.xyz.z*32.0f));
		CAP(a,-512,511);
		CAP(b,-512,511);
		CAP(c,-512,511);
		bitbuffer_put( &buf, (uint)a, 10 );
		bitbuffer_put( &buf, (uint)b, 10 );
		bitbuffer_put( &buf, (uint)c, 10 );

		return bitbuffer_write_flush(&buf);

	} else {

		// unpack rotational velocity
		a = bitbuffer_get_signed(&buf,10);
		b = bitbuffer_get_signed(&buf,10);
		c = bitbuffer_get_signed(&buf,10);
		pi->rotvel.xyz.x = i2fl(a)/32.0f;
		pi->rotvel.xyz.y = i2fl(b)/32.0f;
		pi->rotvel.xyz.z = i2fl(c)/32.0f;

		return bitbuffer_read_flush(&buf);
	}
}

int multi_pack_unpack_desired_vel_and_desired_rotvel( int write, bool full_physics, ubyte *data, physics_info *pi, vec3d* local_desired_vel)
{
	bitbuffer buf;

	bitbuffer_init(&buf,data);

	int a = 0, b = 0, c = 0;
	int d = 0, e = 0, f = 0;

	// we could have reduced it to 8 when full physics is false, and saved the byte, 
	// but this ends up allowing us more accuracy during capship warpin/out
	const int z_bitcount = (full_physics) ? 9 : 16; 				
	const int z_capfactor = (full_physics) ? 255 : 32640;

	if ( write )	{
		if (full_physics) {
			// output desired rotational velocity
			if (pi->max_rotvel.xyz.x > 0.0f) {
				a = fl2i(round( (pi->desired_rotvel.xyz.x / pi->max_rotvel.xyz.x) * 15.0f)); 
			}

			if (pi->max_rotvel.xyz.y > 0.0f) {
				b = fl2i(round( (pi->desired_rotvel.xyz.y / pi->max_rotvel.xyz.y) * 15.0f));
			}

			if (pi->max_rotvel.xyz.z > 0.0f) {
				c = fl2i(round( (pi->desired_rotvel.xyz.z / pi->max_rotvel.xyz.z) * 15.0f));
			}

			CAP(a,-15,15);
			CAP(b,-15,15);
			CAP(c,-15,15);
			bitbuffer_put( &buf, (uint)a,5);
			bitbuffer_put( &buf, (uint)b,5);
			bitbuffer_put( &buf, (uint)c,5);

		}

		// pack desired velocity.
		if (pi->max_vel.xyz.x > 0.0f) {
			d = fl2i(round( (local_desired_vel->xyz.x / pi->max_vel.xyz.x) * 7.0f)); 
		}

		if (pi->max_vel.xyz.y > 0.0f) {
			e = fl2i(round( (local_desired_vel->xyz.y / pi->max_vel.xyz.y) * 7.0f));
		}

		// for z velocity, take into account afterburner.
		float z_divisor = MAX(pi->afterburner_max_vel.xyz.z, pi->max_vel.xyz.z);

		if (z_divisor > 0.0f) {
			f = fl2i(round( (local_desired_vel->xyz.z / z_divisor) * 255.0f));
		}

		CAP(d,-7,7);
		CAP(e,-7,7);
		CAP(f,-z_capfactor,z_capfactor);
		bitbuffer_put( &buf, (uint)d,4);
		bitbuffer_put( &buf, (uint)e,4);
		bitbuffer_put( &buf, (uint)f,z_bitcount); // either 9 or 16 bits.

		return bitbuffer_write_flush(&buf);

	} else {

		if (full_physics) {
			// unpack desired rotational velocity
			a = bitbuffer_get_signed(&buf,5);
			b = bitbuffer_get_signed(&buf,5);
			c = bitbuffer_get_signed(&buf,5);
			pi->desired_rotvel.xyz.x = pi->max_rotvel.xyz.x * i2fl(a)/15.0f;
			pi->desired_rotvel.xyz.y = pi->max_rotvel.xyz.y * i2fl(b)/15.0f;
			pi->desired_rotvel.xyz.z = pi->max_rotvel.xyz.z * i2fl(c)/15.0f;

		}

		// unpack desired velocity
		d = bitbuffer_get_signed(&buf,4);
		e = bitbuffer_get_signed(&buf,4);
		f = bitbuffer_get_signed(&buf,z_bitcount); // either 9 or 16 bits.
		local_desired_vel->xyz.x = pi->max_vel.xyz.x * i2fl(d)/7.0f;
		local_desired_vel->xyz.y = pi->max_vel.xyz.y * i2fl(e)/7.0f;

		float z_multiplier = MAX(pi->afterburner_max_vel.xyz.z, pi->max_vel.xyz.z);

		local_desired_vel->xyz.z = z_multiplier * i2fl(f)/255.0f;


		return bitbuffer_read_flush(&buf);
	}
}

// changed these names since they are used for more than one packet now
#define MULTI_PACKER_TRUE  1
#define MULTI_PACKER_FALSE 0

// pack cur_angle data from turrets
int multi_pack_turret_angles(ubyte* data, ship_subsys* ssp) 
{
	bitbuffer buf;

	bitbuffer_init(&buf, data);

	uint contains_section;
	bool section1 = false; 
	bool section2 = false;

	// if the first section is valid 
	if (ssp->submodel_instance_1 != nullptr){
		contains_section = MULTI_PACKER_TRUE;
		section1 = true;
	} else { 
		contains_section = MULTI_PACKER_FALSE;
	}

	// place the flag in the packet
	bitbuffer_put(&buf, contains_section, 1);

	// if the second section is valid 
	if (ssp->submodel_instance_2 != nullptr){
		contains_section = MULTI_PACKER_TRUE;
		section2 = true;
	} else {
		contains_section = MULTI_PACKER_FALSE;
	}

	// place the flag in the packet
	bitbuffer_put(&buf, contains_section, 1);

	if (!section1 && !section2){
		return bitbuffer_write_flush(&buf);
	}

	bool both = (section1 && section2);

	// how much data we can send per angle depends on whether we're sending both
	// so figure it out here, to be used below. (accuracy is now at least 1/3 of a degree)
	float factor = both ? 1024.0f : 8192.0f ;
	int size = both ? 11 : 14;

	if (section1) {
		int out = fl2i(round(ssp->submodel_instance_1->cur_angle * factor));
		CAP(out, static_cast<int>(-factor * PI2), static_cast<int>(factor * PI2));
		bitbuffer_put(&buf, static_cast<uint>(out), size);
	}

	if (section2) {
		int out = fl2i(round(ssp->submodel_instance_2->cur_angle * factor));
		CAP(out, static_cast<int>(-factor * PI2), static_cast<int>(factor * PI2));
		bitbuffer_put(&buf, static_cast<uint>(out), size);
	}

	return bitbuffer_write_flush(&buf);
}

// unpack cur_angle data to store in the engine for use.
int multi_unpack_turret_angles(ubyte* data, std::pair<bool, float>& angle1, std::pair<bool, float>& angle2) 
{
	bitbuffer buf;

	bitbuffer_init(&buf, data);

	uint contains_section;
	bool section1 = false; 
	bool section2 = false;

	contains_section = bitbuffer_get_unsigned(&buf, 1);

	if (contains_section == MULTI_PACKER_TRUE) {
		section1 = true;
	}

	contains_section = bitbuffer_get_unsigned(&buf, 1);

	if (contains_section == MULTI_PACKER_TRUE){
		section2 = true;
	}

	// literally nothing to see here
	if (!section1 && !section2){
		return bitbuffer_read_flush(&buf);
	}

	bool both = (section1 && section2);

	// how much data we receive per angle depends on whether we're sending both
	// so figure it out here, to be used below. (accuracy is at least .35 degrees)
	float factor = both ? 1024.0f : 8192.0f ;
	int size = both ? 11 : 14;

	// we are *not* writing directly to the subsystem, because the timing is stored in the packet,
	// and things will sync better if we take that into account.  Writing directly to game info is 
	// hacky (although 90% of our multi code does it).  So shunt it to two parameters passed by pointer.
	if (section1) {
		int angle_in = bitbuffer_get_signed(&buf, size);
		angle1.first = true;
		angle1.second = static_cast<float>(angle_in) / factor;
	}

	if (section2) {
		int angle_in = bitbuffer_get_signed(&buf, size);
		angle2.first = true;
		angle2.second = static_cast<float>(angle_in) / factor;
	}

	return bitbuffer_read_flush(&buf);
}

#define SUBSYSTEM_LIST_MINI_PACKET_SIZE 7
#define SUBSYSTEM_PACKER_CUTOFF 128

// Cyborg17 - A packing function to manage subsystem info.
int multi_pack_unpack_subsystem_list(bool write, ubyte* data, SCP_vector<ubyte>* flags, SCP_vector<float>* subsys_data)
{

	bitbuffer buf;

	bitbuffer_init(&buf,data);

	Assertion(flags != nullptr, "Someone fed multi_pack_unpack_subsystem_list a nullptr. This is a coder mistake, please report.");
	Assertion(subsys_data != nullptr, "Someone fed multi_pack_unpack_subsystem_list a nullptr. This is a coder mistake, please report.");

	// packing/unpacking variable
	int a = 0;
	bool done = false;

	if (write) {

		int last_index = (int)flags->size();

		// no need to pack anything if there's nothing to pack.
		if (last_index == 0) {
			return 0;
		}

		// because we need to make sure there are predictable chunks, expand the last chunck if it is the wrong size.
		// we can't depend on the subsystem info being the same on both sides and knowing how the packet ends that way.
		int remainder = last_index % SUBSYSTEM_LIST_MINI_PACKET_SIZE;

		if (remainder > 0) {
			last_index += SUBSYSTEM_LIST_MINI_PACKET_SIZE - remainder;
			for (int i = remainder; i < SUBSYSTEM_LIST_MINI_PACKET_SIZE; i++) {
				flags->push_back(0);
			}
		}


		ubyte current_flags;
		int subsys_data_index = 0;

		// go through the list of subsystems sent to the packer
		for (int i = 0; i < last_index; i++) {
			current_flags = flags->at(i);

			// mark this if there are things to store for this subsystem
			if (current_flags > 0) {
				a = MULTI_PACKER_TRUE;
				bitbuffer_put( &buf, (uint)a,1);

				// is there health stored?
				if (current_flags & OO_SUBSYS_HEALTH) {
					a = MULTI_PACKER_TRUE;
					bitbuffer_put( &buf, (uint)a,1);

					// stuff the health of the subsystem.  
					a = (int)(subsys_data->at(subsys_data_index) * 127);
					CAP(a, 0, 127);
					bitbuffer_put( &buf, (uint)a,7);
					subsys_data_index++;

					// this succinctly marks if there are any other flags, instead of listing each.
					// because a lot of times we do not have both health and animation marked.
					current_flags &= ~OO_SUBSYS_HEALTH;
					if (current_flags > 0) {
						a = MULTI_PACKER_TRUE;
						bitbuffer_put( &buf, (uint)a,1);

					} // if no other flags, mark as done and go to the next subsystem
					else {
						a = MULTI_PACKER_FALSE;
						bitbuffer_put( &buf, (uint)a,1);
						done = true;
					}					
				} // no new health info for this subsystem.
				else {
					a = MULTI_PACKER_FALSE;
					bitbuffer_put(&buf, (uint)a, 1);
				}

				if (!done) {

					// health is dealt with, now add turret orientation
					// (other types need to be dealt with in other ways.i.e. Dumb rotate needs time syncing, not constant updates)
					if (current_flags & (OO_SUBSYS_ROTATION_1b)) {
						// mark as present
						a = MULTI_PACKER_TRUE;
						bitbuffer_put(&buf, (uint)a, 1);
						// stuff value
						a = (int)(subsys_data->at(subsys_data_index) * 511);
						CAP(a, 0, 511);
						// 9 bits allows for an accuracy of less than a degree
						bitbuffer_put(&buf, (uint)a, 9);

						subsys_data_index++;

					} // no rotation in this axis
					else {
						a = MULTI_PACKER_FALSE;
						bitbuffer_put(&buf, (uint)a, 1);
					}

					if (current_flags & (OO_SUBSYS_ROTATION_1h)) {
						// mark as present
						a = MULTI_PACKER_TRUE;
						bitbuffer_put(&buf, (uint)a, 1);
						// stuff value
						a = (int)(subsys_data->at(subsys_data_index) * 511);
						CAP(a, 0, 511);
						// 9 bits allows for an accuracy of less than a degree
						bitbuffer_put(&buf, (uint)a, 9);
						// move on to the next piece of info
						subsys_data_index++;

					} // no rotation in this axis
					else {
						a = MULTI_PACKER_FALSE;
						bitbuffer_put(&buf, (uint)a, 1);
					}

					if (current_flags & (OO_SUBSYS_ROTATION_1p)) {
						// mark as present
						a = MULTI_PACKER_TRUE;
						bitbuffer_put(&buf, (uint)a, 1);
						// stuff value
						a = (int)(subsys_data->at(subsys_data_index) * 511);
						CAP(a, 0, 511);
						// 9 bits allows for an accuracy of less than a degree
						bitbuffer_put(&buf, (uint)a, 9);
						// move on to the next piece of info
						subsys_data_index++;

					} // no rotation in this axis
					else {
						a = MULTI_PACKER_FALSE;
						bitbuffer_put(&buf, (uint)a, 1);
					}

					if (current_flags & (OO_SUBSYS_ROTATION_2b)) {
						// mark as present
						a = MULTI_PACKER_TRUE;
						bitbuffer_put(&buf, (uint)a, 1);
						// stuff value
						a = (int)(subsys_data->at(subsys_data_index) * 511);
						CAP(a, 0, 511);
						// 9 bits allows for an accuracy of less than a degree
						bitbuffer_put(&buf, (uint)a, 9);
						// move on to the next piece of info
						subsys_data_index++;

					} // no rotation in this axis
					else {
						a = MULTI_PACKER_FALSE;
						bitbuffer_put(&buf, (uint)a, 1);
					}

					if (current_flags & (OO_SUBSYS_ROTATION_2h)) {
						// mark as present
						a = MULTI_PACKER_TRUE;
						bitbuffer_put(&buf, (uint)a, 1);
						// stuff value
						a = (int)(subsys_data->at(subsys_data_index) * 511);
						CAP(a, 0, 511);
						// 9 bits allows for an accuracy of less than a degree
						bitbuffer_put(&buf, (uint)a, 9);
						// move on to the next piece of info
						subsys_data_index++;

					} // no rotation in this axis
					else {
						a = MULTI_PACKER_FALSE;
						bitbuffer_put(&buf, (uint)a, 1);
					}

					if (current_flags & (OO_SUBSYS_ROTATION_2p)) {
						// mark as present
						a = MULTI_PACKER_TRUE;
						bitbuffer_put(&buf, (uint)a, 1);
						// stuff value
						a = (int)(subsys_data->at(subsys_data_index) * 511);
						CAP(a, 0, 511);
						// 9 bits allows for an accuracy of less than a degree
						bitbuffer_put(&buf, (uint)a, 9);
						// move on to the next piece of info
						subsys_data_index++;

					} // no rotation in this axis
					else {
						a = MULTI_PACKER_FALSE;
						bitbuffer_put(&buf, (uint)a, 1);
					}

					// this is where translation info should go, once implemented and if needed! 
					// It Will require a multi bump...
				}


			} // if there was no info to pack, mark it as so, and move on.
			else {
				a = MULTI_PACKER_FALSE;
				bitbuffer_put( &buf, (uint)a,1);
			}


			// whenever we've reached the end of a section, tell the client if we're continuing.
			if (( (i + 1) % 7 == 0) && (i != 0)) {
				// and if we're at the end or have gone too far, mark it as the end.
				if ((i >= (last_index - 1)) || (bitbuffer_read_flush(&buf) >= SUBSYSTEM_PACKER_CUTOFF) ){
					a = MULTI_PACKER_FALSE;
					bitbuffer_put( &buf, (uint)a,1);
					break;
				} // start a new section right after this bit.
				else {
					a = MULTI_PACKER_TRUE;
					bitbuffer_put( &buf, (uint)a,1);
				}
			}

			// reset skipping rotation flag
			done = false;
		}
		return bitbuffer_write_flush(&buf);
	}
	else {
	Assertion(flags->empty(), "The flags vector was not empty before being sent to multi_pack_unpack_subsystem_list. This is a coder mistake, please report!");
	Assertion(subsys_data->empty(), "The subsys_data vector was not empty before being sent to multi_pack_unpack_subsystem_list. This is a coder mistake, please report!");

	int current_subsystem_index = 0;
	flags->push_back(0);
		// each iteration of this outer loop is a mini packet within the OO_packet.
		do {
			for (int i = 0; i < SUBSYSTEM_LIST_MINI_PACKET_SIZE; i++) {
				done = false;
				a = bitbuffer_get_unsigned(&buf, 1);
			
				// check to see if there is info to unpack
				if (a == MULTI_PACKER_TRUE) {

					// is there health info?
					a = bitbuffer_get_unsigned(&buf, 1);
					if (a == MULTI_PACKER_TRUE) {
						flags->at(current_subsystem_index) |= OO_SUBSYS_HEALTH;

						a = bitbuffer_get_unsigned(&buf, 7);
						subsys_data->push_back((float)a / 127.0f);

						// check for additional info for this subsystem.
						a = bitbuffer_get_unsigned(&buf, 1);
						if (a == MULTI_PACKER_FALSE) {
							// no further info, continue.
							done = true;
						}
					}

					if (!done) {
						//  now check for each type of subsystem rotation before going on to the next subsystem
						a = bitbuffer_get_unsigned(&buf, 1);
						if (a == MULTI_PACKER_TRUE) {
							flags->at(current_subsystem_index) |= OO_SUBSYS_ROTATION_1b;
							a = bitbuffer_get_unsigned(&buf, 9);
							subsys_data->push_back( ((float) a) / 511.0f);	
						}

						a = bitbuffer_get_unsigned(&buf, 1);
						if (a == MULTI_PACKER_TRUE) {
							flags->at(current_subsystem_index) |= OO_SUBSYS_ROTATION_1h;
							a = bitbuffer_get_unsigned(&buf, 9);
							subsys_data->push_back( ((float) a) / 511.0f);	
						}

						a = bitbuffer_get_unsigned(&buf, 1);
						if (a == MULTI_PACKER_TRUE) {
							flags->at(current_subsystem_index) |= OO_SUBSYS_ROTATION_1p;
							a = bitbuffer_get_unsigned(&buf, 9);
							subsys_data->push_back( ((float) a) / 511.0f);	
						}

						a = bitbuffer_get_unsigned(&buf, 1);
						if (a == MULTI_PACKER_TRUE) {
							flags->at(current_subsystem_index) |= OO_SUBSYS_ROTATION_2b;
							a = bitbuffer_get_unsigned(&buf, 9);
							subsys_data->push_back( ((float) a) / 511.0f);	
						}

						a = bitbuffer_get_unsigned(&buf, 1);
						if (a == MULTI_PACKER_TRUE) {
							flags->at(current_subsystem_index) |= OO_SUBSYS_ROTATION_2h;
							a = bitbuffer_get_unsigned(&buf, 9);
							subsys_data->push_back( ((float) a) / 511.0f);	
						}

						a = bitbuffer_get_unsigned(&buf, 1);
						if (a == MULTI_PACKER_TRUE) {
							flags->at(current_subsystem_index) |= OO_SUBSYS_ROTATION_2p;
							a = bitbuffer_get_unsigned(&buf, 9);
							subsys_data->push_back( ((float) a) / 511.0f);	
						}
					}
				} 

				flags->push_back(0);
				current_subsystem_index++;
			}

			a = bitbuffer_get_unsigned(&buf, 1);
		} while (a == MULTI_PACKER_TRUE);
		
		return bitbuffer_read_flush(&buf);
	}
}

// Karajorma - sends the player to the correct debrief for this game type
// Currently supports the dogfight kill matrix and normal debriefing stages but if new types are created they should be added here
void send_debrief_event() {	
	// we have a special debriefing screen multiplayer furballs use by default
	if((Game_mode & GM_MULTIPLAYER) && IS_MISSION_MULTI_DOGFIGHT && !(The_mission.flags[Mission::Mission_Flags::Toggle_debriefing])) {
		gameseq_post_event( GS_EVENT_MULTI_DOGFIGHT_DEBRIEF);
	}
	// do the normal debriefing for all other situations
	else {
		gameseq_post_event(GS_EVENT_DEBRIEF);
	}
}

// sends out a ping if we are multi so that psnet2 doesn't kill us off for a long load
void multi_send_anti_timeout_ping()
{
	if (Game_mode & GM_MULTIPLAYER) {
		if (!Multi_ping_timestamp.isValid() || ui_timestamp_elapsed(Multi_ping_timestamp)) {
			multi_ping_send_all();
			Multi_ping_timestamp = ui_timestamp(10000); // timeout is 10 seconds between pings
		}
	}
}

#ifdef _MSC_VER
#pragma optimize("", on)
#endif