protocol.c

#include "quakedef.h"

// this is 88 bytes (must match entity_state_t in protocol.h)
entity_state_t defaultstate =
{
	// ! means this is not sent to client
	0,//double time; // ! time this state was built (used on client for interpolation)
	{0,0,0},//float netcenter[3]; // ! for network prioritization, this is the center of the bounding box (which may differ from the origin)
	{0,0,0},//float origin[3];
	{0,0,0},//float angles[3];
	0,//int effects;
	0,//unsigned int customizeentityforclient; // !
	0,//unsigned short number; // entity number this state is for
	0,//unsigned short modelindex;
	0,//unsigned short frame;
	0,//unsigned short tagentity;
	0,//unsigned short specialvisibilityradius; // ! larger if it has effects/light
	0,//unsigned short viewmodelforclient; // !
	0,//unsigned short exteriormodelforclient; // ! not shown if first person viewing from this entity, shown in all other cases
	0,//unsigned short nodrawtoclient; // !
	0,//unsigned short drawonlytoclient; // !
	0,//unsigned short traileffectnum;
	{0,0,0,0},//unsigned short light[4]; // color*256 (0.00 to 255.996), and radius*1
	ACTIVE_NOT,//unsigned char active; // true if a valid state
	0,//unsigned char lightstyle;
	0,//unsigned char lightpflags;
	0,//unsigned char colormap;
	0,//unsigned char skin; // also chooses cubemap for rtlights if lightpflags & LIGHTPFLAGS_FULLDYNAMIC
	255,//unsigned char alpha;
	16,//unsigned char scale;
	0,//unsigned char glowsize;
	254,//unsigned char glowcolor;
	0,//unsigned char flags;
	0,//unsigned char internaleffects; // INTEF_FLAG1QW and so on
	0,//unsigned char tagindex;
	{32, 32, 32},//unsigned char colormod[3];
	{32, 32, 32},//unsigned char glowmod[3];
};

// LadyHavoc: I own protocol ranges 96, 97, 3500-3599

struct protocolversioninfo_s
{
	int number;
	protocolversion_t version;
	const char *name;
}
protocolversioninfo[] =
{
	{ 3505, PROTOCOL_DARKPLACES8 , "DP8"},
	{ 3504, PROTOCOL_DARKPLACES7 , "DP7"},
	{ 3503, PROTOCOL_DARKPLACES6 , "DP6"},
	{ 3502, PROTOCOL_DARKPLACES5 , "DP5"},
	{ 3501, PROTOCOL_DARKPLACES4 , "DP4"},
	{ 3500, PROTOCOL_DARKPLACES3 , "DP3"},
	{   97, PROTOCOL_DARKPLACES2 , "DP2"},
	{   96, PROTOCOL_DARKPLACES1 , "DP1"},
	{   15, PROTOCOL_QUAKEDP     , "QUAKEDP"},
	{   15, PROTOCOL_QUAKE       , "QUAKE"},
	{   28, PROTOCOL_QUAKEWORLD  , "QW"},
	{  250, PROTOCOL_NEHAHRAMOVIE, "NEHAHRAMOVIE"},
	{10000, PROTOCOL_NEHAHRABJP  , "NEHAHRABJP"},
	{10001, PROTOCOL_NEHAHRABJP2 , "NEHAHRABJP2"},
	{10002, PROTOCOL_NEHAHRABJP3 , "NEHAHRABJP3"},
	{    0, PROTOCOL_UNKNOWN     , NULL}
};

protocolversion_t Protocol_EnumForName(const char *s)
{
	int i;
	for (i = 0;protocolversioninfo[i].name;i++)
		if (!strcasecmp(s, protocolversioninfo[i].name))
			return protocolversioninfo[i].version;
	return PROTOCOL_UNKNOWN;
}

const char *Protocol_NameForEnum(protocolversion_t p)
{
	int i;
	for (i = 0;protocolversioninfo[i].name;i++)
		if (protocolversioninfo[i].version == p)
			return protocolversioninfo[i].name;
	return "UNKNOWN";
}

protocolversion_t Protocol_EnumForNumber(int n)
{
	int i;
	for (i = 0;protocolversioninfo[i].name;i++)
		if (protocolversioninfo[i].number == n)
			return protocolversioninfo[i].version;
	return PROTOCOL_UNKNOWN;
}

int Protocol_NumberForEnum(protocolversion_t p)
{
	int i;
	for (i = 0;protocolversioninfo[i].name;i++)
		if (protocolversioninfo[i].version == p)
			return protocolversioninfo[i].number;
	return 0;
}

void Protocol_Names(char *buffer, size_t buffersize)
{
	int i;
	if (buffersize < 1)
		return;
	buffer[0] = 0;
	for (i = 0;protocolversioninfo[i].name;i++)
	{
		if (i > 0)
			dp_strlcat(buffer, " ", buffersize);
		dp_strlcat(buffer, protocolversioninfo[i].name, buffersize);
	}
}

void Protocol_UpdateClientStats(const int *stats)
{
	int i;
	// update the stats array and set deltabits for any changed stats
	for (i = 0;i < MAX_CL_STATS;i++)
	{
		if (host_client->stats[i] != stats[i])
		{
			host_client->statsdeltabits[i >> 3] |= 1 << (i & 7);
			host_client->stats[i] = stats[i];
		}
	}
}

// only a few stats are within the 32 stat limit of Quake, and most of them
// are sent every frame in svc_clientdata messages, so we only send the
// remaining ones here
static const int sendquakestats[] =
{
// quake did not send these secrets/monsters stats in this way, but doing so
// allows a mod to increase STAT_TOTALMONSTERS during the game, and ensures
// that STAT_SECRETS and STAT_MONSTERS are always correct (even if a client
// didn't receive an svc_foundsecret or svc_killedmonster), which may be most
// valuable if randomly seeking around in a demo
STAT_TOTALSECRETS, // never changes during game
STAT_TOTALMONSTERS, // changes in some mods
STAT_SECRETS, // this makes svc_foundsecret unnecessary
STAT_MONSTERS, // this makes svc_killedmonster unnecessary
STAT_VIEWHEIGHT, // sent just for FTEQW clients
STAT_VIEWZOOM, // this rarely changes
-1,
};

void Protocol_WriteStatsReliable(void)
{
	int i, j;
	if (!host_client->netconnection)
		return;
	// detect changes in stats and write reliable messages
	// this only deals with 32 stats because the older protocols which use
	// this function can only cope with 32 stats,
	// they also do not support svc_updatestatubyte which was introduced in
	// DP6 protocol (except for QW)
	for (j = 0;sendquakestats[j] >= 0;j++)
	{
		i = sendquakestats[j];
		// check if this bit is set
		if (host_client->statsdeltabits[i >> 3] & (1 << (i & 7)))
		{
			host_client->statsdeltabits[i >> 3] -= (1 << (i & 7));
			// send the stat as a byte if possible
			if (sv.protocol == PROTOCOL_QUAKEWORLD)
			{
				if (host_client->stats[i] >= 0 && host_client->stats[i] < 256)
				{
					MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestat);
					MSG_WriteByte(&host_client->netconnection->message, i);
					MSG_WriteByte(&host_client->netconnection->message, host_client->stats[i]);
				}
				else
				{
					MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestatlong);
					MSG_WriteByte(&host_client->netconnection->message, i);
					MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
				}
			}
			else
			{
				// this could make use of svc_updatestatubyte in DP6 and later
				// protocols but those protocols do not use this function
				MSG_WriteByte(&host_client->netconnection->message, svc_updatestat);
				MSG_WriteByte(&host_client->netconnection->message, i);
				MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
			}
		}
	}
}