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server.c
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server.c
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#ifndef WIN32
#include "config.h"
#endif
#include <stdio.h>
#include <sys/types.h>
#if (!defined(WIN32))
#ifdef TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#else
#ifdef TM_IN_SYS_TIME
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#else
#include <time.h>
#include <winsock.h>
#endif
#include <stdlib.h>
#include <signal.h>
#include <math.h>
#include <errno.h>
#ifdef HAVE_FLOAT_H
#include <float.h>
#endif
#ifndef __USE_GNU
#define __USE_GNU
#endif
#include <string.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef __EMX__
#define INCL_DOS
#include <os2.h>
#endif
#include "data.h"
#include "server.h"
#include "net.h"
#include "cfg.h"
#include "hash.h"
#include "time.h"
#include "getopt.h"
#include "math.h"
#include "error.h"
unsigned short port=DEFAULT_PORT; /* game port (not a gameport ;-) )*/
int level_number=0; /* line number in the LEVEL_FILE */
int fd; /* socket */
int n_players; /* highest ID of player */
int active_players=0; /* # of players in the game */
unsigned int id=0; /* my ID */
unsigned long_long game_start; /* time of game start */
/* important sprites */
int grenade_sprite,bullet_sprite,slug_sprite,shell_sprite,shotgun_shell_sprite,
mess1_sprite,mess2_sprite,mess3_sprite,mess4_sprite,noise_sprite,
bfgcell_sprite;
int shrapnel_sprite[N_SHRAPNELS],bfgbit_sprite[N_SHRAPNELS],bloodrain_sprite[N_SHRAPNELS],jetfire_sprite;
int nonquitable=0; /* 1=clients can't abort game pressing F12 (request is ignored) */
unsigned long_long last_tick;
unsigned long_long last_player_left=0,last_packet_came=0;
char *level_checksum=0; /* MD5 sum of the level */
short meatcounter=0;
unsigned short weapons_order[ARMS]={4,0,3,1,2,5};
struct birthplace_type
{
int x,y;
}*birthplace=DUMMY;
int n_birthplaces=0;
/* list of players */
struct player_list
{
struct player_list *next,*prev;
struct player member;
}players;
/* time queue of respawning objects */
struct queue_list
{
struct queue_list* next;
unsigned long_long time;
struct it member;
}time_queue;
/* list of objects */
struct object_list objects;
struct player_list *last_player;
struct object_list *last_obj;
#ifdef WIN32
#define SERVICE_NAME "0verkill_017"
#define SERVICE_DISP_NAME "0verkill Server 0.17"
int consoleApp=0; /* 0 kdyz to bezi jako server na pozadi */
/***************************************************/
/* WINDOWS NT SERVICE INSTALLATION/RUNNING/REMOVAL */
#include <winsvc.h>
int server(void);
SERVICE_STATUS ssStatus;
SERVICE_STATUS_HANDLE sshStatusHandle;
DWORD globErr=ERROR_SUCCESS;
TCHAR szErr[2048];
int hServerExitEvent=0; /* close server flag */
LPTSTR GetLastErrorText(LPTSTR lpszBuf, DWORD dwSize) {
DWORD dwRet;
LPTSTR lpszTemp=NULL;
globErr=GetLastError();
dwRet=FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ARGUMENT_ARRAY, NULL,
globErr, LANG_NEUTRAL, (LPTSTR)&lpszTemp, 0, NULL);
/* supplied buffer is not long enough */
if (( !dwRet )||( (long)dwSize < (long)dwRet+14 ))
snprintf(lpszBuf, sizeof(lpszBuf), ": %u", globErr);
else {
lpszTemp[lstrlen(lpszTemp)-2] = TEXT('\0');
CharToOem(lpszTemp, lpszTemp);
snprintf(lpszBuf, sizeof(lpszBuf), ": %u: %s", globErr, lpszTemp);
}
if ( lpszTemp )
LocalFree((HLOCAL)lpszTemp);
return lpszBuf;
}
void CmdInstallService(LPCTSTR pszUserName, LPCTSTR pszUserPassword, LPCTSTR pszDependencies) {
SC_HANDLE schService;
SC_HANDLE schSCManager;
TCHAR szPath[2048];
printf("Installing %s as ", SERVICE_NAME);
if ( pszUserName==NULL )
printf("LOCAL_SYSTEM");
else {
printf("\"%s\"", pszUserName);
if ( pszUserPassword )
printf("/\"%s\"", pszUserPassword);
};
printf("...\r\n");
if ( GetModuleFileName(NULL, szPath, 2046)==0 ) {
printf("Unable to install %s%s\r\n", SERVICE_NAME, GetLastErrorText(szErr, 2046));
return;
};
schSCManager=OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
if ( schSCManager ) {
schService=CreateService(
schSCManager, /* SCManager database */
SERVICE_NAME, /* name of service */
SERVICE_DISP_NAME, /* name to display */
SERVICE_ALL_ACCESS, /* desired access */
SERVICE_WIN32_OWN_PROCESS, /* service type */
SERVICE_DEMAND_START, /* start type */
SERVICE_ERROR_NORMAL, /* error control type */
szPath, /* service's binary */
NULL, /* no load ordering group */
NULL, /* no tag identifier */
pszDependencies, /* dependencies */
pszUserName, /* account */
pszUserPassword); /* password */
if ( schService ) {
printf("%s was installed successfully.\r\n", SERVICE_NAME);
globErr=ERROR_SUCCESS;
CloseServiceHandle(schService);
}
else
printf("CreateService failed%s\r\n", GetLastErrorText(szErr, 2046));
CloseServiceHandle(schSCManager);
}
else
printf("OpenSCManager failed%s\r\n", GetLastErrorText(szErr, 2046));
}
void CmdRemoveService() {
SC_HANDLE schService,
schSCManager;
schSCManager=OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
if ( schSCManager ) {
schService=OpenService(schSCManager, SERVICE_NAME, SERVICE_ALL_ACCESS);
if ( schService ) {
if ( ControlService(schService, SERVICE_CONTROL_STOP, &ssStatus) ) {
printf("Stopping %s...\r\n", SERVICE_NAME);
Sleep(500);
while( QueryServiceStatus(schService, &ssStatus) ) {
if ( ssStatus.dwCurrentState==SERVICE_STOP_PENDING ) {
printf(".");
Sleep(500);
}
else
break;
};
if ( ssStatus.dwCurrentState == SERVICE_STOPPED )
printf("\r\n%s stopped successfully.\r\n", SERVICE_NAME);
else
printf("\r\n%s failed to stop.\r\n", SERVICE_NAME);
}
else
printf("ControlService failed%s\r\n", GetLastErrorText(szErr, 2046));
if ( DeleteService(schService) ) {
globErr=ERROR_SUCCESS;
printf("%s removed.\r\n", SERVICE_NAME);
}
else
printf("DeleteService failed%s\r\n", GetLastErrorText(szErr, 2046));
CloseServiceHandle(schService);
}
else
printf("OpenService failed%s\r\n", GetLastErrorText(szErr, 2046));
CloseServiceHandle(schSCManager);
}
else
printf("OpenSCManager failed%s\r\n", GetLastErrorText(szErr, 2046));
}
void AddToMessageLog(LPTSTR lpszMsg, int infoOnly) {
TCHAR szMsg[2048];
HANDLE hEventSource;
LPTSTR lpszStrings[2];
hEventSource=RegisterEventSource(NULL, SERVICE_NAME);
snprintf(szMsg, sizeof(szMsg), infoOnly ? "%s notification:" : "%s error: %u", SERVICE_NAME, globErr);
lpszStrings[0]=szMsg;
lpszStrings[1]=lpszMsg;
if ( hEventSource!=INVALID_HANDLE_VALUE ) {
ReportEvent(hEventSource, infoOnly ? EVENTLOG_INFORMATION_TYPE : EVENTLOG_ERROR_TYPE, 0, 0, NULL, 2, 0, (LPCTSTR*)lpszStrings, NULL);
DeregisterEventSource(hEventSource);
};
};
BOOL ReportStatusToSCMgr(DWORD dwCurrentState, DWORD dwWin32ExitCode, DWORD dwWaitHint) {
static DWORD dwCheckPoint=1;
BOOL fResult=TRUE;
if ( dwCurrentState==SERVICE_START_PENDING )
ssStatus.dwControlsAccepted=0;
else
ssStatus.dwControlsAccepted=SERVICE_ACCEPT_STOP;
ssStatus.dwCurrentState=dwCurrentState;
ssStatus.dwWin32ExitCode=dwWin32ExitCode;
ssStatus.dwWaitHint=dwWaitHint;
if (( dwCurrentState==SERVICE_RUNNING )||
( dwCurrentState==SERVICE_STOPPED ))
ssStatus.dwCheckPoint=0;
else
ssStatus.dwCheckPoint=dwCheckPoint++;
if ( !(fResult=SetServiceStatus(sshStatusHandle, &ssStatus)) ) {
globErr=GetLastError();
AddToMessageLog("SetServiceStatus failed", 0);
}
return fResult;
}
void ServiceStop() {
hServerExitEvent=1;
raise(SIGINT);
}
void WINAPI ServiceCtrl(DWORD dwCtrlCode) {
switch( dwCtrlCode ) {
case SERVICE_CONTROL_STOP:
ReportStatusToSCMgr(SERVICE_STOP_PENDING, NO_ERROR, 500);
ServiceStop();
return;
};
if ( hServerExitEvent )
ReportStatusToSCMgr(SERVICE_STOP_PENDING, NO_ERROR, 0);
else
ReportStatusToSCMgr(SERVICE_RUNNING, NO_ERROR, 0);
}
void ServiceStart(DWORD dwArgc, LPTSTR *lpszArgv) {
if ( dwArgc>1 )
SetCurrentDirectory(lpszArgv[1]);
else {
char path[1024],
*p2;
GetModuleFileName(NULL, path, sizeof(path));
p2=path+strlen(path);
while(( p2>=path )&&( *p2!='\\' )&&( *p2!='/' ))
p2--;
*p2=0;
SetCurrentDirectory(path);
}
server();
}
void WINAPI ServiceMain(DWORD dwArgc, LPTSTR *lpszArgv) {
if ( !(sshStatusHandle=RegisterServiceCtrlHandler(SERVICE_NAME, ServiceCtrl)) )
return;
ssStatus.dwServiceType=SERVICE_WIN32_OWN_PROCESS;
ssStatus.dwServiceSpecificExitCode=0;
if ( !ReportStatusToSCMgr(SERVICE_START_PENDING, NO_ERROR, 3000))
goto Cleanup;
nonquitable=1;
ServiceStart(dwArgc, lpszArgv);
Cleanup:
ReportStatusToSCMgr(SERVICE_STOPPED, globErr, 0);
return;
};
/* WINDOWS NT SERVICE INSTALLATION/REMOVAL */
/*******************************************/
#endif
/* load dynamic data */
static void load_dynamic(char * filename)
{
FILE * stream;
static char line[1024];
char *p,*q,*name;
int n,x,y,t;
#ifndef WIN32
if (!(stream=fopen(filename,"rb")))
#else
if (!fopen_s(&stream, filename, "rb"))
#endif
{
char msg[256];
snprintf(msg,256,"Can't open file \"%s\"!\n",filename);
ERROR(msg);
EXIT(1);
}
while(fgets(line,1024,stream))
{
p=line;
_skip_ws(&p);
for (name=p;(*p)!=' '&&(*p)!=9&&(*p)!=10&&(*p);p++);
if (!(*p))continue;
*p=0;p++;
_skip_ws(&p);
if ((t=_convert_type(*p))<0){char msg[256];snprintf(msg,256,"Unknown object type '%c'.\n",*p);ERROR(msg);EXIT(1);}
p++;
_skip_ws(&p);
x=strtol(p,&q,0);
_skip_ws(&q);
y=strtol(q,&p,0);
if (t==TYPE_BIRTHPLACE) /* birthplace */
{
n_birthplaces++;
birthplace=mem_realloc(birthplace,sizeof(struct birthplace_type)*n_birthplaces);
if (!birthplace){ERROR("Error: Not enough memory.\n");EXIT(1);}
birthplace[n_birthplaces-1].x=x;
birthplace[n_birthplaces-1].y=y;
continue;
}
if (find_sprite(name,&n)){char msg[256];snprintf(msg,256,"Unknown bitmap name \"%s\"!\n",name);ERROR(msg);EXIT(1);}
new_obj(id,t,0,n,0,0,int2double(x),int2double(y),0,0,0);
id++;
}
fclose(stream);
if (!n_birthplaces){ERROR("Error: No birthplaces.\n");EXIT(1);}
}
/* write a message to stdout or stderr */
static void message(char *msg,int output)
{
time_t t;
struct tm tm;
static char timestamp[64];
#ifdef WIN32
if ( !consoleApp )
return;
#endif
t=time(0);
#ifndef WIN32
tm=*(localtime(&t));
#else
localtime_s(&tm, &t);
#endif
/* time stamp is in format day.month.year hour:minute:second */
snprintf(timestamp,64,"%2d.%2d.%d %02d:%02d:%02d ",tm.tm_mday,tm.tm_mon+1,tm.tm_year+1900,tm.tm_hour,tm.tm_min,tm.tm_sec);
switch (output)
{
case 1:
printf("%s%s",timestamp,msg);
fflush(stdout);
break;
case 2:
fprintf(stderr,"%s%s",timestamp,msg);
fflush(stderr);
break;
}
}
/* switch weapon to the player's best one */
static int select_best_weapon(struct player* p)
{
unsigned short t[ARMS]={4,0,1,3,2,5};
int a;
for (a=ARMS-1;a>=0;a--)
if ((p->weapons&(1<<t[a]))&&p->ammo[t[a]])return t[a];
return p->current_weapon;
}
/* Bakta modify - better weapon selection routines */
/* test if weapon is better than the one he wields */
static int is_weapon_better(struct player* p, int weapon)
{
int i;
int cur=0, test=0;
for(i=ARMS-1;i>=0;i--)
{
if(weapons_order[i]==p->current_weapon)
cur = i;
if(weapons_order[i]==weapon)
test = i;
}
return cur<test;
}
/* test if player p has weapon and can use it (has ammo for it) */
static int is_weapon_usable(struct player* p, int weapon)
{
return !!((p->weapons&(1<<weapon))&&p->ammo[weapon]);
}
/* test if player p has weapon and has no ammo for it */
static int is_weapon_empty(struct player* p, int weapon)
{
return !!((p->weapons&(1<<weapon))&&!p->ammo[weapon]);
}
/* initialize socket */
static void init_socket(void)
{
struct sockaddr_in server;
fd=socket(PF_INET,SOCK_DGRAM,IPPROTO_UDP);
if (fd<0)
{
ERROR("Error: Can't create socket!\n");
EXIT(1);
}
server.sin_family=AF_INET;
server.sin_port=htons(port);
server.sin_addr.s_addr=INADDR_ANY;
if (bind(fd,(struct sockaddr*)&server,sizeof(server)))
{
char msg[256];
snprintf(msg,256,"Error: Can't bind socket to port %d!\n",port);
ERROR(msg);
EXIT(1);
}
}
/* selects random birthplace and returns */
static void find_birthplace(int *x,int *y)
{
int a=random()%n_birthplaces;
*x=birthplace[a].x;
*y=birthplace[a].y;
}
/* return index of hero with color num in sprites field */
/* if there's not such color, returns -1 */
static int select_hero(int num)
{
static char txt[32];
int a;
snprintf(txt, sizeof(txt), "hero%d",num);
if (find_sprite(txt,&a))return -1;
return a;
}
/* initialize player */
static void init_player(struct player* p,int x,int y)
{
int a;
p->health=100;
p->health_ep=ILLNESS_SPEED;
p->armor=0;
p->current_weapon=0;
p->weapons= WEAPON_MASK_GUN |
WEAPON_MASK_GRENADE |
WEAPON_MASK_CHAINSAW |
WEAPON_MASK_BLOODRAIN; /* he has only gun, grenades, chainsaw and bloodrain */
p->invisibility_counter=0;
for (a=0;a<ARMS;a++)
p->ammo[a]=0;
p->ammo[WEAPON_GUN]=weapon[WEAPON_GUN].basic_ammo;
p->ammo[WEAPON_CHAINSAW]=weapon[WEAPON_CHAINSAW].basic_ammo;
p->obj->xspeed=0;
p->obj->yspeed=0;
p->obj->status=0;
p->obj->ttl=0;
p->obj->anim_pos=0;
p->obj->x=x;
p->obj->y=y;
}
/* completely add player to server's database */
/* player starts on x,y coordinates */
static int add_player(unsigned char color, char *name,struct sockaddr_in *address,int x, int y)
{
int h;
struct player_list *cp;
/* alloc memory for new player */
cp=mem_alloc(sizeof(struct player_list));
if (!cp)
{message("Not enough memory.\n",2);return 1;}
cp->member.name=mem_alloc(strlen(name)+1);
if (!cp->member.name)
{mem_free(cp);message("Not enough memory.\n",2);return 1;}
/* fill in the structure */
cp->member.color=color;
cp->member.frags=0;
cp->member.deaths=0;
cp->member.keyboard_status.status=0;
cp->member.keyboard_status.weapon=0;
cp->member.id=n_players+1; /* player numbering starts from 1, 0 is server's ID */
cp->member.last_update=get_time();
memcpy(cp->member.name,name,strlen(name)+1);
cp->member.address=*address;
cp->member.packet_pos=0;
cp->member.current_level=-1;
/* create new object "player" */
h=select_hero(cp->member.color);
if (h<0)
{mem_free(cp->member.name);mem_free(cp);message ("No such color.\n",1);return 1;}
cp->member.obj=new_obj(id,T_PLAYER,0,h,0,0,int2double(x),int2double(y),0,0,(&(cp->member)));
if (!cp->member.obj)
{mem_free(cp->member.name);mem_free(cp);message("Can't create object.\n",1);return 1;}
id++;
init_player(&(cp->member),int2double(x),int2double(y));
/* that's all */
cp->prev=last_player;
cp->next=0;
last_player->next=cp;
last_player=cp;
return 0;
}
static void send_chunk_to_player(struct player *player)
{
static char p[MAX_PACKET_LENGTH];
if (!(player->packet_pos))return;
if (player->packet_pos>MAX_PACKET_LENGTH-1)return;
p[0]=P_CHUNK;
memcpy(p+1,player->packet,player->packet_pos);
send_packet(p,(player->packet_pos)+1,(struct sockaddr*)(&(player->address)),0,player->id);
player->packet_pos=0;
}
static void send_chunk_packet_to_player(char *packet, int len, struct player *player)
{
if (len>MAX_PACKET_LENGTH-1)return;
if ((player->packet_pos)+len>MAX_PACKET_LENGTH-1)send_chunk_to_player(player);
memcpy((player->packet)+(player->packet_pos),packet,len);
player->packet_pos+=len;
}
static void send_chunks(void)
{
struct player_list* p;
for (p=&players;p->next;p=p->next)
send_chunk_to_player(&(p->next->member));
}
/* send a packet to all players except one */
/* if not_this_player is null, sends to all players */
static void sendall(char *packet,int len, struct player * not_this_player)
{
struct player_list* p;
if (!not_this_player)
for (p=&players;p->next;p=p->next)
send_packet(packet,len,(struct sockaddr*)(&(p->next->member.address)),0,p->next->member.id);
else
for (p=&players;p->next;p=p->next)
if ((&(p->next->member))!=not_this_player)
send_packet(packet,len,(struct sockaddr*)(&(p->next->member.address)),0,p->next->member.id);
}
/* send a packet to all players except one */
/* if not_this_player is null, sends to all players */
static void sendall_chunked(char *packet,int len, struct player * not_this_player)
{
struct player_list* p;
if (!not_this_player)
for (p=&players;p->next;p=p->next)
send_chunk_packet_to_player(packet,len,&(p->next->member));
else
for (p=&players;p->next;p=p->next)
if ((&(p->next->member))!=not_this_player)
send_chunk_packet_to_player(packet,len,&(p->next->member));
}
static int which_update(struct it *obj,int old_x,int old_y,int old_x_speed,int old_y_speed,unsigned int old_status,int old_ttl)
{
int a=0;
if (old_ttl==obj->ttl)
{
if (old_x_speed==obj->xspeed&&old_y_speed==obj->yspeed)a=5; /* update pos and status */
if (old_x==obj->x&&old_y==obj->y)a=4; /* update speed and status */
}
if (old_status==obj->status&&old_ttl==obj->ttl)
{
a=1; /* update speed+coords */
if (old_x_speed==obj->xspeed&&old_y_speed==obj->yspeed)a=3; /* update pos */
if (old_x==obj->x&&old_y==obj->y)
{
if(a==3)return -1; /* nothing to update */
a=2; /* update speed */
}
}
return a;
}
/* send a packet to all players except one */
/* if not_this_player is null, sends to all players */
/* type is:
0=full update
1=update speed+coordinates
2=update speed
3=update coordinates
4=update speed + status
5=update coordinates + status
6=update speed + status + ttl
7=update coordinates + status + ttl
*/
static void sendall_update_object(struct it* obj, struct player * not_this_player,int type)
{
struct player_list* p;
static char packet[32];
int offset = 0;
switch (type)
{
case 0: /* all */
packet[offset++]=P_UPDATE_OBJECT;
put_int(packet,obj->id,&offset);
packet[offset++]=obj->update_counter;
put_int(packet,obj->x,&offset);
put_int(packet,obj->y,&offset);
put_int(packet,obj->xspeed,&offset);
put_int(packet,obj->yspeed,&offset);
put_int(packet,obj->status,&offset);
put_int16(packet,obj->ttl,&offset);
break;
case 1: /* coordinates and speed */
packet[offset++]=P_UPDATE_OBJECT_POS;
put_int(packet,obj->id,&offset);
packet[offset++]=obj->update_counter;
put_int(packet,obj->x,&offset);
put_int(packet,obj->y,&offset);
put_int(packet,obj->xspeed,&offset);
put_int(packet,obj->yspeed,&offset);
break;
case 2: /* speed */
packet[offset++]=P_UPDATE_OBJECT_SPEED;
put_int(packet,obj->id,&offset);
packet[offset++]=obj->update_counter;
put_int(packet,obj->xspeed,&offset);
put_int(packet,obj->yspeed,&offset);
break;
case 3: /* coordinates */
packet[offset++]=P_UPDATE_OBJECT_COORDS;
put_int(packet,obj->id,&offset);
packet[offset++]=obj->update_counter;
put_int(packet,obj->x,&offset);
put_int(packet,obj->y,&offset);
break;
case 4: /* speed and status */
packet[offset++]=P_UPDATE_OBJECT_SPEED_STATUS;
put_int(packet,obj->id,&offset);
packet[offset++]=obj->update_counter;
put_int(packet,obj->xspeed,&offset);
put_int(packet,obj->yspeed,&offset);
put_int(packet,obj->status,&offset);
break;
case 5: /* coordinates and status */
packet[offset++]=P_UPDATE_OBJECT_COORDS_STATUS;
put_int(packet,obj->id,&offset);
packet[offset++]=obj->update_counter;
put_int(packet,obj->x,&offset);
put_int(packet,obj->y,&offset);
put_int(packet,obj->status,&offset);
break;
case 6: /* speed and status and ttl */
packet[offset++]=P_UPDATE_OBJECT_SPEED_STATUS_TTL;
put_int(packet,obj->id,&offset);
packet[offset++]=obj->update_counter;
put_int(packet,obj->xspeed,&offset);
put_int(packet,obj->yspeed,&offset);
put_int(packet,obj->status,&offset);
put_int16(packet,obj->ttl,&offset);
break;
case 7: /* coordinates and status and ttl */
packet[offset++]=P_UPDATE_OBJECT_COORDS_STATUS_TTL;
put_int(packet,obj->id,&offset);
packet[offset++]=obj->update_counter;
put_int(packet,obj->x,&offset);
put_int(packet,obj->y,&offset);
put_int16(packet,obj->status,&offset);
put_int16(packet,obj->ttl,&offset);
break;
default: /* don't update */
return;
}
obj->update_counter++;
if (!not_this_player)
for (p=&players;p->next;p=p->next)
send_chunk_packet_to_player(packet,offset,&(p->next->member));
else
for (p=&players;p->next;p=p->next)
if ((&(p->next->member))!=not_this_player)
send_chunk_packet_to_player(packet,offset,&(p->next->member));
}
/* send update status packet to all players (except not_this_player if this is !NULL)*/
static void sendall_update_status(struct it* obj, struct player * not_this_player)
{
struct player_list* p;
static char packet[32];
int offset = 0;
packet[offset++]=P_UPDATE_STATUS;
put_int(packet,obj->id,&offset);
put_int(packet,obj->status,&offset);
if (!not_this_player)
for (p=&players;p->next;p=p->next)
send_chunk_packet_to_player(packet,offset,&(p->next->member));
else
for (p=&players;p->next;p=p->next)
if ((&(p->next->member))!=not_this_player)
send_chunk_packet_to_player(packet,offset,&(p->next->member));
}
/* send hit packet to all players except not_this player (if !NULL)*/
static void sendall_hit(unsigned long id,unsigned char direction,unsigned char xoffs,unsigned char yoffs,struct player* not_this_player)
{
struct player_list* p;
static char packet[8];
int offset = 0;
packet[offset++]=P_HIT;
put_int(packet,id,&offset);
packet[offset++]=direction;
packet[offset++]=xoffs;
packet[offset++]=yoffs;
if (!not_this_player)
for (p=&players;p->next;p=p->next)
send_chunk_packet_to_player(packet,offset,&(p->next->member));
else
for (p=&players;p->next;p=p->next)
if ((&(p->next->member))!=not_this_player)
send_chunk_packet_to_player(packet,offset,&(p->next->member));
}
/* sort players according to frags */
static int _qsort_cmp(const void *a,const void *b)
{
int fa,fb,da,db;
fa=(*((struct player**)a))->frags;
fb=(*((struct player**)b))->frags;
da=(*((struct player**)a))->deaths;
db=(*((struct player**)b))->deaths;
if (fa>fb)return -1;
if (fa==fb)
{
if (da<db)return -1;
if (da>db)return 1;
return 0;
}
return 1;
}
/* send info how many players are in the game and top score */
/* id=recipient's id */
/* if addr is NULL info is sent to all */
static void send_info(struct sockaddr *addr,int id)
{
char *packet;
int p=active_players>TOP_PLAYERS_N?TOP_PLAYERS_N:active_players;
int a,offset = 0,l;
struct player **t; /* table for qsort */
struct player_list *q;
/* alloc memory */
t=mem_alloc(active_players*sizeof(struct player*));
if (!t)return;
packet=mem_alloc(1+4+1+p*(MAX_NAME_LEN+4+4));
if (!packet)return;
/* fill table for quicksort */
for (a=0,q=(&players);q->next;a++,q=q->next)
t[a]=&(q->next->member);
/* sort players */
qsort(t,active_players,sizeof(struct player*),_qsort_cmp);
/* create packet header */
packet[offset++]=P_INFO;
put_int(packet,active_players,&offset);
packet[offset++]=p;
/* put players into packet */
for (a=0;a<p;a++)
{
put_int(packet,(t[a])->frags,&offset);
put_int(packet,(t[a])->deaths,&offset);
packet[offset++]=t[a]->color;
memcpy(packet+offset,(t[a])->name,l=strlen((t[a])->name)+1);
offset+=l;
}
if (!addr)
sendall(packet,offset,0);
else send_packet(packet,offset,addr,0,id);
mem_free(packet);
mem_free(t);
}
/* returns the actual length of the packet to be sent */
static int build_message_packet(char packet[], int maxlen, char *name, char *msg, char flags)
{
int n, len = 0;
/* assert(maxlen > 2); */
packet[0] = P_MESSAGE;
packet[1] = flags;
len += 2;
if (!name)
n = snprintf(packet + len, maxlen - len, "%s", msg);
else
n = snprintf(packet + len, maxlen - len, "%s> %s", name, msg);
/* account for the space the text consumed in the packet; could have been truncated */
len += min(n + 1, maxlen - len);
return len;
}
/* send message to a player */
/* name is name of player who sent the message (chat), NULL means it's from server */
static void send_message(struct player* player, char *name, char *msg, char flags)
{
static char packet[256];
int len;
len = build_message_packet(packet, sizeof(packet), name, msg, flags);
send_chunk_packet_to_player(packet, len, player);
}
/* similar to send_message but sends to all except one or two players */
static void sendall_message(char *name, char *msg,struct player *not1,struct player* not2, char flags)
{
static char packet[256];
int len;
struct player_list* p;
len = build_message_packet(packet, sizeof(packet), name, msg, flags);
for (p=&players;p->next;p=p->next)
if ((!not1||(&(p->next->member))!=not1)&&(!not2||(&(p->next->member))!=not2))
send_chunk_packet_to_player(packet, len, &(p->next->member));
}
static void sendall_bell(void)
{
static char packet;
struct player_list* p;
packet=P_BELL;
for (p=&players;p->next;p=p->next)
send_chunk_packet_to_player(&packet,1,&(p->next->member));
}
#if 0
/* send new object information to given address */
static void send_new_obj(struct sockaddr* address, struct it* obj,int id)
{
static char packet[32];
int offset = 0;
packet[offset++]=P_NEW_OBJ;
put_int(packet,obj->id,&offset);
put_int16(packet,obj->sprite,&offset);
put_int(packet,obj->x,&offset);
put_int(packet,obj->y,&offset);
put_int(packet,obj->xspeed,&offset);
put_int(packet,obj->yspeed,&offset);
put_int(packet,obj->status,&offset);
packet[offset++]=obj->type;
put_int16(packet,obj->ttl,&offset);
send_packet(packet,offset,address,0,id);
}
#endif
/* send new object information to given address */
static void send_new_obj_chunked(struct player* player, struct it* obj)
{
static char packet[32];
int offset = 0;
packet[offset++]=P_NEW_OBJ;
put_int(packet,obj->id,&offset);
put_int16(packet,obj->sprite,&offset);
put_int(packet,obj->x,&offset);
put_int(packet,obj->y,&offset);
put_int(packet,obj->xspeed,&offset);
put_int(packet,obj->yspeed,&offset);
put_int(packet,obj->status,&offset);
packet[offset++]=obj->type;
put_int16(packet,obj->ttl,&offset);
send_chunk_packet_to_player(packet,offset,player);
}
/* send player update to given player */
static void send_update_player(struct player* p)
{
static char packet[32];
int a,offset = 0;
packet[offset++]=P_UPDATE_PLAYER;
packet[offset++]=p->health;