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server.cc
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/*
server.cc
(c) Richard Thrippleton
Licensing terms are in the 'LICENSE' file
If that file is not included with this source then permission is not given to use this source in any way whatsoever.
*/
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include "sockhelper.h"
#include "calc.h"
#include "error.h"
#include "protocol.h"
#include "ship.h"
#include "frag.h"
#include "planet.h"
#include "alliance.h"
#include "constants.h"
#include "player.h"
#include "os.h"
#include "server.h"
struct octets //Structure for extraction of octets from an IP
{
unsigned char o1;
unsigned char o2;
unsigned char o3;
unsigned char o4;
};
void server::init()
{
for(int i=0;i<ISIZE;i++)
connections[i]=NULL;
lstn=NULL;
}
void server::start(bool locg)
{
IPaddress serv; //Server listening interface
tcks=0;
qsig=false;
try
{
logf=os::openpersonal("log","a");
}
catch(error it)
{
logf=stdout;
}
SDLNet_ResolveHost(&serv,NULL,PORT);
lstn=SDLNet_TCP_Open(&serv);
if(!lstn)
throw error("Can't open listening socket");
fprintf(logf,"%s: Server started listening on port %hd\n",os::gettime(),PORT);
fflush(logf);
server::locg=locg;
locl=false;
}
void server::stop()
{
for(int i=0;i<ISIZE;i++)
if(connections[i])
delete connections[i];
if(lstn!=NULL)
{
SDLNet_TCP_Close(lstn);
lstn=NULL;
fprintf(logf,"%s: Server shutdown\n",os::gettime());
fflush(logf);
}
if(logf && logf!=stdout)
fclose(logf);
}
void server::cycle()
{
TCPsocket sock; //Sample socket
tcks++;
if(tcks>32766)
tcks=1;
sock=NULL;
if(!locl)
sock=SDLNet_TCP_Accept(lstn);
if(sock)
{
for(int i=0;i<ISIZE;i++)
{
if(!connections[i])
{
connections[i]=new server(i,sock);
if(locg)
locl=true;
break;
}
}
}
for(int i=0;i<ISIZE;i++)
{
if(connections[i])
{
try
{
connections[i]->poll();
connections[i]->uploads();
}
catch(error it)
{
connections[i]->log("Dropped from the game: %s",it.str);
delete connections[i];
}
}
}
if(qsig)
throw error("Server caught quit signal");
}
void server::notifydelete(player* ply)
{
for(int i=0;i<ISIZE;i++)
if(connections[i] && connections[i]->ply==ply)
connections[i]->ply=NULL;
}
void server::notifykill(player* ply)
{
for(int i=0;i<ISIZE;i++)
if(connections[i] && connections[i]->ply==ply && connections[i]->ply->in)
connections[i]->kill();
}
void server::hail(player* fr,player* to,char* msg)
{
char txt[256]; //Communications text
char* frnm; //Name of from
if(!to)
return;
frnm=NULL;
if(fr)
{
frnm=fr->nam;
if(!frnm)
if(fr->in)
frnm=fr->in->cls;
else
frnm="";
sprintf(txt,"%s: %s",frnm,msg);
}
else
sprintf(txt,"%s",msg);
for(int i=0;i<ISIZE;i++)
{
if(connections[i] && (connections[i]->ply==to || (fr && connections[i]->ply==fr)))
{
if(fr && fr->in)
connections[i]->hilight(fr->in);
connections[i]->printtomesg("%s",txt);
if(connections[i]->ply==to)
{
if(connections[i]->ply->in)
server::registersound(connections[i]->ply->in,SND_COMM);
connections[i]->log("Received hail \"%s\"",txt);
}
}
}
}
void server::bulletin(char* fmt,...)
{
char buf[132]; //Outgoing buffer
va_list fmts;
if(fmt[0]!='\0')
{
va_start(fmts,fmt);
vsprintf(buf,fmt,fmts);
va_end(fmts);
for(int i=0;i<ISIZE;i++)
if(connections[i])
connections[i]->printtomesg("%s",buf);
fprintf(logf,"%s: Bulletin - %s\n",os::gettime(),buf);
fflush(logf);
}
}
void server::registernoise(ship* fr,int snd)
{
unsigned char buf[SERV_NOISE_SZ]; //Buffer for sending sound
for(int i=0;i<ISIZE;i++)
{
if(connections[i] && connections[i]->ply && connections[i]->ply->in && connections[i]->lsnd!=snd && connections[i]->ply->in->see(fr))
{
connections[i]->lsnd=snd;
buf[0]=SERV_NOISE;
calc::inttodat(snd,buf+1);
calc::inttodat(ship2pres(fr->self),buf+3);
connections[i]->hlpr->send(buf,SERV_NOISE_SZ);
}
}
}
void server::registersound(ship* to,int snd)
{
unsigned char buf[SERV_SND_SZ]; //Buffer for sending sound
for(int i=0;i<ISIZE;i++)
{
if(connections[i] && connections[i]->ply && connections[i]->ply->in==to && connections[i]->lsnd!=snd)
{
connections[i]->lsnd=snd;
buf[0]=SERV_SND;
calc::inttodat(snd,buf+1);
connections[i]->hlpr->send(buf,SERV_SND_SZ);
}
}
}
void server::registershake(ship* to,int mag)
{
unsigned char buf[SERV_SHAKE_SZ]; //Buffer for sending shake
for(int i=0;i<ISIZE;i++)
{
if(connections[i] && connections[i]->ply && connections[i]->ply->in==to)
{
buf[0]=SERV_SHAKE;
calc::inttodat(mag,buf+1);
connections[i]->hlpr->send(buf,SERV_SHAKE_SZ);
}
}
}
void server::quitsignal(int sig)
{
qsig=true;
}
server::server(int self,TCPsocket sock)
{
unsigned long ip; //ip of connecting client
octets* oip; //Ip as octets, for writing to Ip record
this->self=self;
this->sock=sock;
hlpr=NULL;
hlpr=new sockhelper(sock);
hlpr->pump();
auth=false;
lsnd=-1;
inpb[0]='\0';
ply=NULL;
foc=-1;
shpu=new bool[ship::ISIZE];
for(int i=0;i<ship::ISIZE;i++)
shpu[i]=false;
plnu=new bool[planet::ISIZE];
for(int i=0;i<planet::ISIZE;i++)
plnu[i]=false;
frgu=new bool[frag::ISIZE];
for(int i=0;i<frag::ISIZE;i++)
frgu[i]=false;
log("Connection opened");
urat=10;
ip=SDLNet_TCP_GetPeerAddress(sock)->host;
oip=(octets*)&ip;
if(oip->o1==127 && oip->o2==0 && oip->o3==0 && oip->o4==1)
cbnd=999999999;
else
cbnd=0;
tout=0;
}
server::~server()
{
if(ply)
ply->logout();
log("Connection terminated");
connections[self]=NULL;
if(hlpr)
delete hlpr;
SDLNet_TCP_Close(sock);
}
void server::log(char* fmt,...)
{
unsigned long ip; //ip of connecting client
octets* oip; //Ip as octets, for writing to Ip record
va_list fmts; //For resolving the format string
fprintf(logf,"%s: ",os::gettime());
fprintf(logf,"[%hd] ",self);
if(ply)
fprintf(logf,"%s ",ply->nam);
else
fprintf(logf," ");
ip=SDLNet_TCP_GetPeerAddress(sock)->host;
oip=(octets*)&ip;
fprintf(logf,"(%hd.%hd.%hd.%hd) ",(int)oip->o1,(short)oip->o2,(short)oip->o3,(short)oip->o4);
va_start(fmts,fmt);
vfprintf(logf,fmt,fmts);
va_end(fmts);
fprintf(logf,"\n");
fflush(logf);
}
void server::poll()
{
int typ,opr; //Action description
unsigned char* buf; //Incoming data buffer
long sbnd; //Server bandwidth used by this player
unsigned char fldb[SERV_FLOOD_SZ]; //Flooding buffer
hlpr->pump();
tout++;
if(tout>200)
throw error("Activity timeout");
if(auth)
{
lsnd=-1;
for(int i=0;i<32;i++)
acth[i]=false;
for(int i=0;i<4;i++)
{
buf=hlpr->request(3);
if(buf)
{
typ=((int)buf[0]);
opr=calc::dattoint(buf+1);
if(typ>=0 && typ<32)
{
if(typ==CLIENT_CHAR || !acth[typ])
{
action(typ,opr);
hlpr->suck();
}
acth[typ]=true;
}
else
hlpr->suck();
}
else
break;
tout=0;
}
}
else
{
buf=hlpr->request(6);
if(buf)
{
if(calc::dateq((unsigned char*)SIGN,buf,6))
auth=true;
else
throw error("Using incorrect protocol");
hlpr->suck();
fldb[0]=SERV_FLOOD;
for(int i=1;i<SERV_FLOOD_SZ;i++)
fldb[i]=0;
for(int i=0;i<110;i++)
hlpr->send(fldb,SERV_FLOOD_SZ);
changecmod(CMOD_NAME);
}
}
if(tcks%24==0)
{
sbnd=hlpr->getcount();
if(sbnd>(cbnd/2))
urat+=6;
if(sbnd<(cbnd/2))
urat-=2;
if(urat<10)
urat=10;
if(urat>70)
urat=70;
}
}
void server::action(int typ,short opr)
{
if((typ==CLIENT_CONS || typ==CLIENT_CHAR || typ==CLIENT_BANDWIDTH) || (ply && ply->in))
{
try
{
switch(typ)
{
case CLIENT_ACCEL:
ply->in->aity=ship::AI_NULL;
if(opr==-2)
ply->in->accel(-1,true);
if(opr==-1)
ply->in->accel(-1,false);
if(opr==1)
ply->in->accel(+1,false);
if(opr==2)
ply->in->accel(+1,true);
break;
case CLIENT_TURN:
ply->in->aity=ship::AI_NULL;
if(opr==-1)
ply->in->turn(-1);
if(opr==+1)
ply->in->turn(+1);
break;
case CLIENT_SHOOT:
if(opr==0)
ply->in->shoot(false);
if(opr==1)
ply->in->shoot(true);
break;
case CLIENT_TRG:
ply->in->aity=ship::AI_NULL;
ply->in->enem=NULL;
ply->in->frnd=NULL;
ply->in->plnt=NULL;
if(opr>=0 && opr<(planet::ISIZE+ship::ISIZE))
{
if(opr<planet::ISIZE)
ply->in->plnt=planet::get(opr);
else
{
ply->in->enem=ship::get(opr-planet::ISIZE);
if(ply->in->enem==ply->in)
ply->in->enem=NULL;
if(ply->in->enem)
if(ply->in->all->opposes(ply->in->enem->all))
registersound(ply->in,SND_PROXIMITY);
else
registersound(ply->in,SND_BEEP2);
}
}
if(cmod==CMOD_SCAN || cmod==CMOD_HAIL || cmod==CMOD_WHOIS)
changecmod(cmod);
if(cmod==CMOD_REFIT)
changecmod(CMOD_HAIL);
break;
case CLIENT_CMOD:
switch(opr)
{
case REQ_STAT:
changecmod(CMOD_STAT);
break;
case REQ_EQUIP:
changecmod(CMOD_EQUIP);
break;
case REQ_SCAN:
changecmod(CMOD_SCAN);
break;
case REQ_HAIL:
changecmod(CMOD_HAIL);
break;
case REQ_CHAT:
changecmod(CMOD_CHAT);
break;
case REQ_WHOIS:
changecmod(CMOD_WHOIS);
break;
case REQ_HACK:
changecmod(CMOD_HACK);
break;
}
break;
case CLIENT_CONS:
cons(opr);
break;
case CLIENT_CHAR:
if(opr==0)
{
input();
inpb[0]='\0';
}
if(opr>=32 && opr<127)
{
if(opr>=65 && opr<=90)
opr+=32;
for(int i=0;i<64;i++)
{
if(inpb[i]=='\0')
{
inpb[i]=opr;
inpb[i+1]='\0';
break;
}
}
}
break;
case CLIENT_BANDWIDTH:
if(opr>cbnd)
{
cbnd=opr;
log("Bandwidth exploration reports %ld maximum",cbnd);
}
break;
default:
break;
}
}
catch(error it)
{
printtomesg(it.str);
changecmod(cmod);
}
}
}
void server::changecmod(int opr)
{
char* txtp;
char txt[1024]; //Text buffer for constructing output
alliance* tali; //Alliance for possible choosing
int spr; //Sprite to spritetocons with
cmod=opr;
txtp=txt;
spr=-1;
txt[0]='\0';
if(ply && ply->in)
registersound(ply->in,SND_BEEP1);
if(cmod!=CMOD_NAME && cmod!=CMOD_PASS && cmod!=CMOD_CHOOSE && !(ply && ply->in))
return;
switch(opr)
{
case CMOD_NAME:
printtocons("Choose player name\n");
requestline(false);
break;
case CMOD_PASS:
printtocons("Player name currently exists\nPlease input player password");
requestline(true);
break;
case CMOD_CHOOSE:
txtp+=sprintf(txtp,"Choose alliance\n");
for(int i=0;i<alliance::LIBSIZE;i++)
{
tali=alliance::get(i);
if(tali)
txtp+=sprintf(txtp,"[%hd] %s\n",i,tali->nam);
}
printtocons(txt);
break;
case CMOD_STAT:
spr=ply->in->interact(txt,CMOD_STAT,-1,ply->in);
printtocons(txt);
spritetocons(spr);
break;
case CMOD_EQUIP:
ply->in->interact(txt,CMOD_EQUIP,-1,ply->in);
printtocons(txt);
break;
case CMOD_SCAN:
if(ply->in->enem)
{
spr=ply->in->enem->interact(txt,CMOD_SCAN,-1,ply->in);
printtocons(txt);
spritetocons(spr);
}
else
{
if(ply->in->plnt)
{
spr=ply->in->plnt->interact(txt,CMOD_SCAN,-1,ply->in);
printtocons(txt);
spritetocons(spr);
}
else
{
printtocons("No target");
}
}
break;
case CMOD_HAIL:
if(ply->in->enem)
{
ply->in->enem->interact(txt,CMOD_HAIL,-1,ply->in);
printtocons(txt);
}
else
{
if(ply->in->plnt)
{
ply->in->plnt->interact(txt,CMOD_HAIL,-1,ply->in);
printtocons(txt);
}
else
{
printtocons("No target");
}
}
break;
case CMOD_REFIT:
if(ply->in->plnt)
{
ply->in->plnt->interact(txt,CMOD_REFIT,-1,ply->in);
printtocons(txt);
}
break;
case CMOD_CHAT:
txtp+=sprintf(txtp,"Messaging\n\n");
if(ply->in->enem && ply->in->enem->ply)
txtp+=sprintf(txtp,"[1] Chat with target player\n");
txtp+=sprintf(txtp,"[2] Chat with team\n");
txtp+=sprintf(txtp,"[3] Chat with all\n");
printtocons(txt);
break;
case CMOD_CHATPRIVATE:
printtocons("Chat with target player\n");
requestline(false);
break;
case CMOD_CHATTEAM:
printtocons("Chat with team");
requestline(false);
break;
case CMOD_CHATALL:
printtocons("Chat with all");
requestline(false);
break;
case CMOD_WHOIS:
txtp+=sprintf(txtp,"WHOIS\n\n");
if(ply->in->enem)
{
spr=ply->in->enem->interact(txtp,CMOD_WHOIS,-1,ply->in);
txtp=txt+strlen(txt);
}
else
txtp+=sprintf(txtp,"No target\n");
txtp+=sprintf(txtp,"\n[1] Cycle to next player");
printtocons(txt);
spritetocons(spr);
break;
case CMOD_HACK:
if(ply->op && !locg)
{
printtocons("Admin\n\n[1] Set account password\n[2] Kick user\n[3] Delete user\n[4] Shutdown server");
}
else
{
printtocons("Admin\n\n[1] Set account password");
}
break;
case CMOD_PASS1:
printtocons("Choose your password");
requestline(true);
break;
case CMOD_PASS2:
printtocons("Confirm your password");
requestline(true);
break;
case CMOD_KICK:
printtocons("Input username to kick");
requestline(false);
break;
case CMOD_DELETE:
printtocons("Input username to delete");
requestline(false);
break;
}
}
void server::cons(int opr)
{
char txt[1024]; //Text buffer for constructing output
alliance* tali; //Alliance to choose
ship* tshp; //Temporary ship scratchpad
if(opr<0)
return;
if(cmod!=CMOD_CHOOSE && !(ply && ply->in))
return;
txt[0]='\0';
switch(cmod)
{
case CMOD_CHOOSE:
tali=alliance::get(opr);
if(tali)
{
ply->spawn(tali);
log("Spawned as %s(%s)",ply->in->cls,ply->in->all->nam);
changecmod(CMOD_HACK);
}
else
{
printtomesg("No such alliance");
changecmod(CMOD_CHOOSE);
}
break;
case CMOD_EQUIP:
ply->in->interact(txt,CMOD_EQUIP,opr,ply->in);
printtomesg(txt);
changecmod(CMOD_EQUIP);
break;
case CMOD_SCAN:
if(ply->in->enem)
ply->in->enem->interact(txt,CMOD_SCAN,opr,ply->in);
else
if(ply->in->plnt)
ply->in->plnt->interact(txt,CMOD_SCAN,opr,ply->in);
break;
case CMOD_HAIL:
if(ply->in->enem)
{
ply->in->enem->interact(txt,CMOD_HAIL,opr,ply->in);
printtomesg(txt);
changecmod(CMOD_HAIL);
}
else
{
if(ply->in->plnt)
{
if(opr==5)
{
if(ply->in->see(ply->in->plnt))
{
if(ply->in->plnt->all==ply->in->all)
{
ply->in->transport(ply->in->plnt);
ply->commit();
printtomesg("Restore position saved");
}
else
throw error("Cannot save with a different allegiance");
}
else
{
throw error("Out of range");
}
}
else if(opr==4)
{
changecmod(CMOD_REFIT);
}
else
{
ply->in->plnt->interact(txt,CMOD_HAIL,opr,ply->in);
printtomesg(txt);
changecmod(CMOD_HAIL);
}
}
}
break;
case CMOD_REFIT:
if(ply->in->plnt)
{
ply->in->plnt->interact(txt,CMOD_REFIT,opr,ply->in);
printtomesg(txt);
changecmod(CMOD_REFIT);
}
break;
case CMOD_CHAT:
if(opr==1 && ply->in->enem && ply->in->enem->ply)
changecmod(CMOD_CHATPRIVATE);
if(opr==2)
changecmod(CMOD_CHATTEAM);
if(opr==3)
changecmod(CMOD_CHATALL);
break;
case CMOD_WHOIS:
if(opr==1)
{
for(int i=0,j=(ply->in->enem ? ply->in->enem->self+1 : 0);i<ship::ISIZE;i++,j++)
{
if(j>=ship::ISIZE)
j=0;
tshp=ship::get(j);
if(tshp && tshp->ply && tshp!=ply->in)
{
ply->in->enem=tshp;
ply->in->frnd=NULL;
ply->in->plnt=NULL;
break;
}
}
changecmod(CMOD_WHOIS);
}
break;
case CMOD_HACK:
if(opr==1)
{
changecmod(CMOD_PASS1);
}
if(ply->op && !locg)
{
if(opr==2)
changecmod(CMOD_KICK);
if(opr==3)
changecmod(CMOD_DELETE);
if(opr==4)
{
log("Server shutdown requested");
qsig=true;
}
}
break;
}
}
void server::requestline(bool hide)
{
unsigned char buf[SERV_READLN_SZ]; //For sending the request byte
buf[0]=SERV_READLN;
buf[1]=(unsigned char)hide;
hlpr->send(buf,SERV_READLN_SZ);
}
void server::input()
{
player* delp; //Player to delete
switch(cmod)
{
case CMOD_NAME:
if(inpb[0]=='\0')
throw error("Aborted name entry");
try
{
if(strlen(inpb)<2)
{
inpb[0]='\0';
throw error("Name too short");
}
ply=player::get(inpb);
if(ply)
{
log("Attempting login");
if(locg)
{
ply->login(NULL);
log("Local game login");
changecmod(CMOD_STAT);
}
else
{
changecmod(CMOD_PASS);
}
}
else
{
ply=new player(inpb);
log("New player created");
changecmod(CMOD_CHOOSE);
}
}
catch(error it)
{
ply=NULL;
log(it.str);
printtomesg(it.str);
changecmod(CMOD_NAME);
}
break;
case CMOD_PASS:
try
{
ply->login(inpb);
log("Login succeeded");
changecmod(CMOD_STAT);
}
catch(error it)
{
ply=NULL;
log(it.str);
printtomesg(it.str);
changecmod(CMOD_NAME);
}
break;
case CMOD_PASS1:
inpb[32]='\0';
strcpy(tpas,inpb);
changecmod(CMOD_PASS2);
break;
case CMOD_PASS2:
inpb[32]='\0';
if(strcmp(inpb,tpas)==0)
{
ply->setpass(inpb);
printtomesg("Password set successfully");
log("Set password");
}
else
{
printtomesg("Passwords don't match!");
}
changecmod(CMOD_HACK);
break;
case CMOD_CHATPRIVATE:
if(ply && ply->in && ply->in->enem && ply->in->enem->ply)
{
hail(ply,ply->in->enem->ply,inpb);
changecmod(CMOD_CHATPRIVATE);
}
break;
case CMOD_CHATTEAM:
if(ply && ply->in)
{
for(int i=0;i<ISIZE;i++)
if(connections[i] && connections[i]->ply && connections[i]->ply->in && connections[i]->ply->in->all==ply->in->all)
hail(ply,connections[i]->ply,inpb);
changecmod(CMOD_CHATTEAM);
}
break;
case CMOD_CHATALL:
if(ply->in)
{
for(int i=0;i<ISIZE;i++)
if(connections[i] && connections[i]->ply)
hail(ply,connections[i]->ply,inpb);
changecmod(CMOD_CHATALL);
}
break;
case CMOD_KICK:
log("Attemped kick of %s",inpb);
for(int i=0;i<ISIZE;i++)
{
if(connections[i] && connections[i]!=this && connections[i]->ply && strcmp(inpb,connections[i]->ply->nam)==0)
{
bulletin("%s was kicked from the server",inpb);
delete connections[i];
break;
}
}
changecmod(CMOD_HACK);
break;
case CMOD_DELETE:
log("Attemped deletion of %s",inpb);
for(int i=0;i<ISIZE;i++)
{
if(connections[i] && connections[i]!=this && connections[i]->ply && strcmp(inpb,connections[i]->ply->nam)==0)
{
bulletin("%s was kicked from the server",inpb);
delete connections[i];
break;
}
}
delp=player::get(inpb);
if(delp && delp!=ply)
delete delp;
changecmod(CMOD_HACK);