// misc useful functions used by the server
#include "cube.h"
// all network traffic is in 32bit ints, which are then compressed using the following simple scheme (assumes that most values are small).
void putint(uchar *&p, int n)
{
if(n<128 && n>-127) { *p++ = n; }
else if(n<0x8000 && n>=-0x8000) { *p++ = 0x80; *p++ = n; *p++ = n>>8; }
else { *p++ = 0x81; *p++ = n; *p++ = n>>8; *p++ = n>>16; *p++ = n>>24; };
};
int getint(uchar *&p)
{
int c = *((char *)p);
p++;
if(c==-128) { int n = *p++; n |= *((char *)p)<<8; p++; return n;}
else if(c==-127) { int n = *p++; n |= *p++<<8; n |= *p++<<16; return n|(*p++<<24); }
else return c;
};
void sendstring(char *t, uchar *&p)
{
while(*t) putint(p, *t++);
putint(p, 0);
};
const char *modenames[] =
{
"SP", "DMSP", "ffa/default", "coopedit", "ffa/duel", "teamplay",
"instagib", "instagib team", "efficiency", "efficiency team",
"insta arena", "insta clan arena", "tactics arena", "tactics clan arena",
};
const char *modestr(int n) { return (n>=-2 && n<12) ? modenames[n+2] : "unknown"; };
char msgsizesl[] = // size inclusive message token, 0 for variable or not-checked sizes
{
SV_INITS2C, 4, SV_INITC2S, 0, SV_POS, 12, SV_TEXT, 0, SV_SOUND, 2, SV_CDIS, 2,
SV_EDITH, 7, SV_EDITT, 7, SV_EDITS, 6, SV_EDITD, 6, SV_EDITE, 6,
SV_DIED, 2, SV_DAMAGE, 4, SV_SHOT, 8, SV_FRAGS, 2,
SV_MAPCHANGE, 0, SV_ITEMSPAWN, 2, SV_ITEMPICKUP, 3, SV_DENIED, 2,
SV_PING, 2, SV_PONG, 2, SV_CLIENTPING, 2, SV_GAMEMODE, 2,
SV_TIMEUP, 2, SV_EDITENT, 10, SV_MAPRELOAD, 2, SV_ITEMACC, 2,
SV_SENDMAP, 0, SV_RECVMAP, 1, SV_SERVMSG, 0, SV_ITEMLIST, 0,
SV_EXT, 0,
-1
};
char msgsizelookup(int msg)
{
for(char *p = msgsizesl; *p>=0; p += 2) if(*p==msg) return p[1];
return -1;
};
// sending of maps between clients
string copyname;
int copysize;
uchar *copydata = NULL;
void sendmaps(int n, string mapname, int mapsize, uchar *mapdata)
{
if(mapsize <= 0 || mapsize > 256*256) return;
strcpy_s(copyname, mapname);
copysize = mapsize;
if(copydata) free(copydata);
copydata = (uchar *)alloc(mapsize);
memcpy(copydata, mapdata, mapsize);
}
ENetPacket *recvmap(int n)
{
if(!copydata) return NULL;
ENetPacket *packet = enet_packet_create(NULL, MAXTRANS + copysize, ENET_PACKET_FLAG_RELIABLE);
uchar *start = packet->data;
uchar *p = start+2;
putint(p, SV_RECVMAP);
sendstring(copyname, p);
putint(p, copysize);
memcpy(p, copydata, copysize);
p += copysize;
*(ushort *)start = ENET_HOST_TO_NET_16(p-start);
enet_packet_resize(packet, p-start);
return packet;
}
#ifdef STANDALONE
void localservertoclient(uchar *buf, int len) {};
void fatal(char *s, char *o) { cleanupserver(); printf("servererror: %s\n", s); exit(1); };
void *alloc(int s) { void *b = calloc(1,s); if(!b) fatal("no memory!"); return b; };
int main(int argc, char* argv[])
{
int uprate = 0, maxcl = 4;
char *sdesc = "", *ip = "", *master = NULL, *passwd = "";
for(int i = 1; i<argc; i++)
{
char *a = &argv[i][2];
if(argv[i][0]=='-') switch(argv[i][1])
{
case 'u': uprate = atoi(a); break;
case 'n': sdesc = a; break;
case 'i': ip = a; break;
case 'm': master = a; break;
case 'p': passwd = a; break;
case 'c': maxcl = atoi(a); break;
default: printf("WARNING: unknown commandline option\n");
};
};
if(enet_initialize()<0) fatal("Unable to initialise network module");
initserver(true, uprate, sdesc, ip, master, passwd, maxcl);
return 0;
};
#endif