// client.cpp, mostly network related client game code
#include "cube.h"
ENetHost *clienthost = NULL;
int connecting = 0;
int connattempts = 0;
int disconnecting = 0;
int clientnum = -1; // our client id in the game
bool c2sinit = false; // whether we need to tell the other clients our stats
int getclientnum() { return clientnum; };
bool multiplayer()
{
// check not correct on listen server?
if(clienthost) conoutf("operation not available in multiplayer");
return clienthost!=NULL;
};
bool allowedittoggle()
{
bool allow = !clienthost || gamemode==1;
if(!allow) conoutf("editing in multiplayer requires coopedit mode (1)");
return allow;
};
VARF(rate, 0, 0, 25000, if(clienthost && (!rate || rate>1000)) enet_host_bandwidth_limit (clienthost, rate, rate));
void throttle();
VARF(throttle_interval, 0, 5, 30, throttle());
VARF(throttle_accel, 0, 2, 32, throttle());
VARF(throttle_decel, 0, 2, 32, throttle());
void throttle()
{
if(!clienthost || connecting) return;
assert(ENET_PEER_PACKET_THROTTLE_SCALE==32);
enet_peer_throttle_configure(clienthost->peers, throttle_interval*1000, throttle_accel, throttle_decel);
};
void newname(char *name) { c2sinit = false; strn0cpy(player1->name, name, 16); };
void newteam(char *name) { c2sinit = false; strn0cpy(player1->team, name, 5); };
COMMANDN(team, newteam, ARG_1STR);
COMMANDN(name, newname, ARG_1STR);
void writeclientinfo(FILE *f)
{
fprintf(f, "name \"%s\"\nteam \"%s\"\n", player1->name, player1->team);
};
void connects(char *servername)
{
disconnect(1); // reset state
addserver(servername);
conoutf("attempting to connect to %s", servername);
ENetAddress address = { ENET_HOST_ANY, CUBE_SERVER_PORT };
if(enet_address_set_host(&address, servername) < 0)
{
conoutf("could not resolve server %s", servername);
return;
};
clienthost = enet_host_create(NULL, 1, rate, rate);
if(clienthost)
{
enet_host_connect(clienthost, &address, 1);
enet_host_flush(clienthost);
connecting = lastmillis;
connattempts = 0;
}
else
{
conoutf("could not connect to server");
disconnect();
};
};
void disconnect(int onlyclean, int async)
{
if(clienthost)
{
if(!connecting && !disconnecting)
{
enet_peer_disconnect(clienthost->peers);
enet_host_flush(clienthost);
disconnecting = lastmillis;
};
if(clienthost->peers->state != ENET_PEER_STATE_DISCONNECTED)
{
if(async) return;
enet_peer_reset(clienthost->peers);
};
enet_host_destroy(clienthost);
};
if(clienthost && !connecting) conoutf("disconnected");
clienthost = NULL;
connecting = 0;
connattempts = 0;
disconnecting = 0;
clientnum = -1;
c2sinit = false;
player1->lifesequence = 0;
loopv(players) zapdynent(players[i]);
localdisconnect();
if(!onlyclean) { stop(); localconnect(); };
};
void trydisconnect()
{
if(!clienthost)
{
conoutf("not connected");
return;
};
if(connecting)
{
conoutf("aborting connection attempt");
disconnect();
return;
};
conoutf("attempting to disconnect...");
disconnect(0, !disconnecting);
};
string ctext;
void toserver(char *text) { conoutf("%s:\f %s", player1->name, text); strn0cpy(ctext, text, 80); };
void echo(char *text) { conoutf("%s", text); };
COMMAND(echo, ARG_VARI);
COMMANDN(say, toserver, ARG_VARI);
COMMANDN(connect, connects, ARG_1STR);
COMMANDN(disconnect, trydisconnect, ARG_NONE);
// collect c2s messages conveniently
vector<ivector> messages;
void addmsg(int rel, int num, int type, ...)
{
if(demoplayback) return;
if(num!=msgsizelookup(type)) { sprintf_sd(s)("inconsistant msg size for %d (%d != %d)", type, num, msgsizelookup(type)); fatal(s); };
if(messages.length()==100) { conoutf("command flood protection (type %d)", type); return; };
ivector &msg = messages.add();
msg.add(num);
msg.add(rel);
msg.add(type);
va_list marker;
va_start(marker, type);
loopi(num-1) msg.add(va_arg(marker, int));
va_end(marker);
};
void server_err()
{
conoutf("server network error, disconnecting...");
disconnect();
};
int lastupdate = 0, lastping = 0;
string toservermap;
bool senditemstoserver = false; // after a map change, since server doesn't have map data
string clientpassword;
void password(char *p) { strcpy_s(clientpassword, p); };
COMMAND(password, ARG_1STR);
bool netmapstart() { senditemstoserver = true; return clienthost!=NULL; };
void initclientnet()
{
ctext[0] = 0;
toservermap[0] = 0;
clientpassword[0] = 0;
newname("unnamed");
newteam("red");
};
void sendpackettoserv(void *packet)
{
if(clienthost) { enet_host_broadcast(clienthost, 0, (ENetPacket *)packet); enet_host_flush(clienthost); }
else localclienttoserver((ENetPacket *)packet);
}
void c2sinfo(dynent *d) // send update to the server
{
if(clientnum<0) return; // we haven't had a welcome message from the server yet
if(lastmillis-lastupdate<40) return; // don't update faster than 25fps
ENetPacket *packet = enet_packet_create (NULL, MAXTRANS, 0);
uchar *start = packet->data;
uchar *p = start+2;
bool serveriteminitdone = false;
if(toservermap[0]) // suggest server to change map
{ // do this exclusively as map change may invalidate rest of update
packet->flags = ENET_PACKET_FLAG_RELIABLE;
putint(p, SV_MAPCHANGE);
sendstring(toservermap, p);
toservermap[0] = 0;
putint(p, nextmode);
}
else
{
putint(p, SV_POS);
putint(p, clientnum);
putint(p, (int)(d->o.x*DMF)); // quantize coordinates to 1/16th of a cube, between 1 and 3 bytes
putint(p, (int)(d->o.y*DMF));
putint(p, (int)(d->o.z*DMF));
putint(p, (int)(d->yaw*DAF));
putint(p, (int)(d->pitch*DAF));
putint(p, (int)(d->roll*DAF));
putint(p, (int)(d->vel.x*DVF)); // quantize to 1/100, almost always 1 byte
putint(p, (int)(d->vel.y*DVF));
putint(p, (int)(d->vel.z*DVF));
// pack rest in 1 byte: strafe:2, move:2, onfloor:1, state:3
putint(p, (d->strafe&3) | ((d->move&3)<<2) | (((int)d->onfloor)<<4) | ((editmode ? CS_EDITING : d->state)<<5) );
if(senditemstoserver)
{
packet->flags = ENET_PACKET_FLAG_RELIABLE;
putint(p, SV_ITEMLIST);
if(!m_noitems) putitems(p);
putint(p, -1);
senditemstoserver = false;
serveriteminitdone = true;
};
if(ctext[0]) // player chat, not flood protected for now
{
packet->flags = ENET_PACKET_FLAG_RELIABLE;
putint(p, SV_TEXT);
sendstring(ctext, p);
ctext[0] = 0;
};
if(!c2sinit) // tell other clients who I am
{
packet->flags = ENET_PACKET_FLAG_RELIABLE;
c2sinit = true;
putint(p, SV_INITC2S);
sendstring(player1->name, p);
sendstring(player1->team, p);
putint(p, player1->lifesequence);
};
loopv(messages) // send messages collected during the previous frames
{
ivector &msg = messages[i];
if(msg[1]) packet->flags = ENET_PACKET_FLAG_RELIABLE;
loopi(msg[0]) putint(p, msg[i+2]);
};
messages.setsize(0);
if(lastmillis-lastping>250)
{
putint(p, SV_PING);
putint(p, lastmillis);
lastping = lastmillis;
};
};
*(ushort *)start = ENET_HOST_TO_NET_16(p-start);
enet_packet_resize(packet, p-start);
incomingdemodata(start, p-start, true);
if(clienthost) { enet_host_broadcast(clienthost, 0, packet); enet_host_flush(clienthost); }
else localclienttoserver(packet);
lastupdate = lastmillis;
if(serveriteminitdone) loadgamerest(); // hack
};
void gets2c() // get updates from the server
{
ENetEvent event;
if(!clienthost) return;
if(connecting && lastmillis/3000 > connecting/3000)
{
conoutf("attempting to connect...");
connecting = lastmillis;
++connattempts;
if(connattempts > 3)
{
conoutf("could not connect to server");
disconnect();
return;
};
};
while(clienthost!=NULL && enet_host_service(clienthost, &event, 0)>0)
switch(event.type)
{
case ENET_EVENT_TYPE_CONNECT:
conoutf("connected to server");
connecting = 0;
throttle();
break;
case ENET_EVENT_TYPE_RECEIVE:
if(disconnecting) conoutf("attempting to disconnect...");
else localservertoclient(event.packet->data, event.packet->dataLength);
enet_packet_destroy(event.packet);
break;
case ENET_EVENT_TYPE_DISCONNECT:
if(disconnecting) disconnect();
else server_err();
return;
}
};