gameserver.c

   1 /*
   2  * Copyright (C) 2021-2023 Mt.ZERO Software, Harry Godden - All Rights Reserved
   3  */
   4
   5 #define _DEFAULT_SOURCE
   6 #include <signal.h>
   7 #include <unistd.h>
   8 #include <time.h>
   9
  10 volatile sig_atomic_t sig_stop;
  11
  12 static void inthandler( int signum ) {
  13    sig_stop = 1;
  14 }
  15
  16 #include "gameserver.h"
  17 #include "highscores.c"
  18 #include "servermonitor_server.c"
  19 #include "vg/vg_opt.h"
  20 #include "network_common.h"
  21
  22 static const u64 k_connection_unauthorized = 0xffffffffffffffff;
  23
  24 static u64_steamid get_connection_authsteamid( SteamNetworkingMessage_t *msg ){
  25    i64 userdata = SteamAPI_ISteamNetworkingSockets_GetConnectionUserData(
  26             hSteamNetworkingSockets, msg->m_conn );
  27
  28    return *((u64_steamid *)&userdata);
  29 }
  30
  31 static void set_connection_authsteamid(HSteamNetConnection con, u64_steamid id){
  32    i64 userdata = *((i64 *)&id);
  33
  34    SteamAPI_ISteamNetworkingSockets_SetConnectionUserData(
  35          hSteamNetworkingSockets, con, userdata );
  36 }
  37
  38 static void gameserver_send_to_all( int ignore,
  39                                     const void *pData, u32 cbData,
  40                                     int nSendFlags ){
  41    for( int i=0; i<vg_list_size(gameserver.clients); i++ ){
  42       struct gameserver_client *client = &gameserver.clients[i];
  43
  44       if( (i==ignore) || !client->active )
  45          continue;
  46
  47       SteamAPI_ISteamNetworkingSockets_SendMessageToConnection(
  48             hSteamNetworkingSockets, client->connection,
  49             pData, cbData, nSendFlags, NULL );
  50    }
  51 }
  52
  53 static void gameserver_player_join( int index ){
  54    struct gameserver_client *joiner = &gameserver.clients[index];
  55
  56    netmsg_playerjoin join = { .inetmsg_id = k_inetmsg_playerjoin,
  57                               .index = index };
  58    gameserver_send_to_all( index, &join, sizeof(join),
  59                            k_nSteamNetworkingSend_Reliable );
  60
  61    /* update the joining user about current connections */
  62
  63    netmsg_playerusername *username =
  64       alloca( sizeof(netmsg_playerusername) + NETWORK_USERNAME_MAX );
  65    username->inetmsg_id = k_inetmsg_playerusername;
  66
  67    netmsg_playeritem *item =
  68       alloca( sizeof(netmsg_playeritem) + ADDON_UID_MAX );
  69    item->inetmsg_id = k_inetmsg_playeritem;
  70
  71    for( int i=0; i<vg_list_size(gameserver.clients); i++ ){
  72       struct gameserver_client *client = &gameserver.clients[i];
  73
  74       if( (i==index) || !client->active )
  75          continue;
  76
  77       /* join */
  78       netmsg_playerjoin init = { .inetmsg_id = k_inetmsg_playerjoin,
  79                                  .index = i };
  80       SteamAPI_ISteamNetworkingSockets_SendMessageToConnection(
  81             hSteamNetworkingSockets, joiner->connection,
  82             &init, sizeof(init), k_nSteamNetworkingSend_Reliable, NULL );
  83
  84       /* username */
  85       username->index = i;
  86       u32 chs = vg_strncpy( client->username, username->name,
  87                             NETWORK_USERNAME_MAX,
  88                             k_strncpy_always_add_null );
  89       u32 size = sizeof(netmsg_playerusername) + chs + 1;
  90       SteamAPI_ISteamNetworkingSockets_SendMessageToConnection(
  91             hSteamNetworkingSockets, joiner->connection,
  92             username, size, k_nSteamNetworkingSend_Reliable, NULL );
  93
  94       /* items */
  95       chs = vg_strncpy( client->item_player, item->uid, ADDON_UID_MAX,
  96                         k_strncpy_always_add_null );
  97       item->type = k_addon_type_player;
  98       item->client = i;
  99       size = sizeof(netmsg_playeritem) + chs + 1;
 100       SteamAPI_ISteamNetworkingSockets_SendMessageToConnection(
 101             hSteamNetworkingSockets, joiner->connection,
 102             item, size, k_nSteamNetworkingSend_Reliable, NULL );
 103
 104       chs = vg_strncpy( client->item_board, item->uid, ADDON_UID_MAX,
 105                         k_strncpy_always_add_null );
 106       item->type = k_addon_type_board;
 107       item->client = i;
 108       size = sizeof(netmsg_playeritem) + chs + 1;
 109       SteamAPI_ISteamNetworkingSockets_SendMessageToConnection(
 110             hSteamNetworkingSockets, joiner->connection,
 111             item, size, k_nSteamNetworkingSend_Reliable, NULL );
 112    }
 113 }
 114
 115 static void gameserver_player_leave( int index ){
 116    netmsg_playerjoin leave;
 117    leave.inetmsg_id = k_inetmsg_playerleave;
 118    leave.index = index;
 119
 120    vg_info( "Player leave (%d)\n", index );
 121    gameserver_send_to_all( index, &leave, sizeof(leave),
 122                            k_nSteamNetworkingSend_Reliable );
 123 }
 124
 125 static void new_client_connecting( HSteamNetConnection client ){
 126    int index = -1;
 127
 128    /* TODO: LRU */
 129    for( int i=0; i<vg_list_size(gameserver.clients); i++ ){
 130       if( !gameserver.clients[i].active ){
 131          index = i;
 132          break;
 133       }
 134    }
 135
 136    if( index == -1 ){
 137       vg_error( "Server full\n" );
 138       SteamAPI_ISteamNetworkingSockets_CloseConnection(
 139             hSteamNetworkingSockets, client,
 140             4500,
 141             NULL, 1 );
 142       return;
 143    }
 144
 145    EResult accept_status = SteamAPI_ISteamNetworkingSockets_AcceptConnection(
 146             hSteamNetworkingSockets, client );
 147    if( accept_status == k_EResultOK ){
 148       vg_success( "Accepted client (id: %u, index: %d)\n", client, index );
 149
 150       gameserver.clients[index].active = 1;
 151       gameserver.clients[index].connection = client;
 152
 153       SteamAPI_ISteamNetworkingSockets_SetConnectionPollGroup(
 154             hSteamNetworkingSockets,
 155             client, gameserver.client_group );
 156
 157       /* Just to be sure */
 158       set_connection_authsteamid( client, -1 );
 159       gameserver_player_join( index );
 160    }
 161    else{
 162       vg_warn( "Error accepting client (id: %u)\n", client );
 163       SteamAPI_ISteamNetworkingSockets_CloseConnection(
 164             hSteamNetworkingSockets, client,
 165             k_ESteamNetConnectionEnd_Misc_InternalError,
 166             NULL, 1 );
 167       gameserver.clients[index].active = 0;
 168       gameserver.clients[index].connection = 0;
 169    }
 170 }
 171
 172 static void on_auth_status( CallbackMsg_t *msg ){
 173    SteamNetAuthenticationStatus_t *info = (void *)msg->m_pubParam;
 174    vg_info( "  Authentication availibility: %s\n",
 175          string_ESteamNetworkingAvailability(info->m_eAvail) );
 176    vg_info( "  %s\n", info->m_debugMsg );
 177 }
 178
 179 static int gameserver_client_index( HSteamNetConnection hconn ){
 180    for( int i=0; i<vg_list_size(gameserver.clients); i++ ){
 181       struct gameserver_client *client = &gameserver.clients[i];
 182
 183       if( client->active ){
 184          if( client->connection == hconn ){
 185             return i;
 186          }
 187       }
 188    }
 189    return -1;
 190 }
 191
 192 static void on_connect_status( CallbackMsg_t *msg ){
 193    SteamNetConnectionStatusChangedCallback_t *info = (void *)msg->m_pubParam;
 194    vg_info( "  Connection status changed for %lu\n", info->m_hConn );
 195
 196    vg_info( "  %s -> %s\n",
 197          string_ESteamNetworkingConnectionState(info->m_eOldState),
 198          string_ESteamNetworkingConnectionState(info->m_info.m_eState) );
 199
 200    if( info->m_info.m_eState==k_ESteamNetworkingConnectionState_Connecting ){
 201       new_client_connecting( info->m_hConn );
 202    }
 203
 204    if( (info->m_info.m_eState ==
 205             k_ESteamNetworkingConnectionState_ClosedByPeer ) ||
 206        (info->m_info.m_eState ==
 207         k_ESteamNetworkingConnectionState_ProblemDetectedLocally ) ){
 208
 209       int client_id = gameserver_client_index( info->m_hConn );
 210       if( client_id != -1 ){
 211          struct gameserver_client *client = &gameserver.clients[client_id];
 212          client->connection = 0;
 213          client->active = 0;
 214          gameserver_player_leave(client_id);
 215       }
 216
 217       vg_info( "End reason: %d\n", info->m_info.m_eEndReason );
 218       SteamAPI_ISteamNetworkingSockets_CloseConnection(
 219             hSteamNetworkingSockets, info->m_hConn, 0, NULL, 0 );
 220    }
 221 }
 222
 223 static void gameserver_rx_auth( SteamNetworkingMessage_t *msg ){
 224    if( gameserver.auth_mode != eServerModeAuthentication ){
 225       vg_error( "Running server without authentication. "
 226                 "Connection %u tried to authenticate.\n", msg->m_conn );
 227       return;
 228    }
 229
 230    if( get_connection_authsteamid( msg ) != k_connection_unauthorized ){
 231       vg_warn( "Already authorized this user but app ticket was sent"
 232                " again (%u)\n", msg->m_conn );
 233       return;
 234    }
 235
 236    vg_low( "Attempting to verify user\n" );
 237
 238    if( msg->m_cbSize < sizeof(netmsg_auth) ){
 239       vg_error( "Malformed auth ticket, too small (%u)\n", msg->m_conn );
 240       return;
 241    }
 242
 243    netmsg_auth *auth = msg->m_pData;
 244
 245    if( msg->m_cbSize < sizeof(netmsg_auth)+auth->ticket_length ||
 246        auth->ticket_length > 1024 ){
 247       vg_error( "Malformed auth ticket, ticket_length incorrect (%u)\n",
 248             auth->ticket_length );
 249       return;
 250    }
 251
 252    u8 decrypted[1024];
 253    u32 ticket_len = 1024;
 254
 255    int success = SteamEncryptedAppTicket_BDecryptTicket(
 256          auth->ticket, auth->ticket_length, decrypted,
 257          &ticket_len, gameserver.app_symmetric_key,
 258          k_nSteamEncryptedAppTicketSymmetricKeyLen );
 259
 260    if( !success ){
 261       vg_error( "Failed to decrypt users ticket (client %u)\n", msg->m_conn );
 262       vg_error( "  ticket length: %u\n", auth->ticket_length );
 263
 264       SteamAPI_ISteamNetworkingSockets_CloseConnection(
 265             hSteamNetworkingSockets,
 266             msg->m_conn, 0, NULL, 1 );
 267       return;
 268    }
 269
 270    if( SteamEncryptedAppTicket_GetTicketIssueTime( decrypted, ticket_len )){
 271       RTime32 ctime = time(NULL),
 272               tickettime = SteamEncryptedAppTicket_GetTicketIssueTime(
 273                     decrypted, ticket_len ),
 274               expiretime = tickettime + 24*3*60*60;
 275
 276       if( ctime > expiretime ){
 277          vg_error( "Ticket expired (client %u)\n", msg->m_conn );
 278
 279          /* TODO: Send expired information */
 280          SteamAPI_ISteamNetworkingSockets_CloseConnection(
 281                hSteamNetworkingSockets,
 282                msg->m_conn, 0, NULL, 1 );
 283          return;
 284       }
 285    }
 286
 287    CSteamID steamid;
 288    SteamEncryptedAppTicket_GetTicketSteamID( decrypted, ticket_len, &steamid );
 289    vg_success( "User is authenticated! steamid %lu (%u)\n",
 290          steamid.m_unAll64Bits, msg->m_conn );
 291
 292    set_connection_authsteamid( msg->m_conn, steamid.m_unAll64Bits );
 293 }
 294
 295 static int inet_require_auth( SteamNetworkingMessage_t *msg ){
 296    if( gameserver.auth_mode == eServerModeNoAuthentication )
 297       return 1;
 298
 299    if( get_connection_authsteamid( msg ) == k_connection_unauthorized ){
 300       vg_warn( "Unauthorized request! Disconnecting client: %u\n",
 301                msg->m_conn );
 302
 303       SteamAPI_ISteamNetworkingSockets_CloseConnection(
 304             hSteamNetworkingSockets,
 305             msg->m_conn, 0, NULL, 1 );
 306
 307       return 0;
 308    }
 309    else return 1;
 310 }
 311
 312 /*
 313  * Player updates sent to us
 314  * -----------------------------------------------------------------------------
 315  */
 316
 317 static int packet_minsize( SteamNetworkingMessage_t *msg, u32 size ){
 318    if( msg->m_cbSize < size ) {
 319       vg_error( "Invalid packet size (must be at least %u)\n", size );
 320       return 0;
 321    }
 322    else{
 323       return 1;
 324    }
 325 }
 326
 327 static void gameserver_rx_200_300( SteamNetworkingMessage_t *msg ){
 328    netmsg_blank *tmp = msg->m_pData;
 329
 330    int client_id = gameserver_client_index( msg->m_conn );
 331    if( client_id == -1 ) return;
 332
 333    if( tmp->inetmsg_id == k_inetmsg_playerusername ){
 334       if( !packet_minsize( msg, sizeof(netmsg_playerusername)+1 ))
 335          return;
 336
 337       struct gameserver_client *client = &gameserver.clients[ client_id ];
 338       netmsg_playerusername *src = msg->m_pData;
 339
 340       u32 name_len = network_msgstring( src->name, msg->m_cbSize,
 341                                         sizeof(netmsg_playerusername),
 342                                         client->username,
 343                                         NETWORK_USERNAME_MAX );
 344
 345       /* update other users about this change */
 346       netmsg_playerusername *prop = alloca(sizeof(netmsg_playerusername)+
 347                                              NETWORK_USERNAME_MAX );
 348
 349       prop->inetmsg_id = k_inetmsg_playerusername;
 350       prop->index = client_id;
 351       u32 chs = vg_strncpy( client->username, prop->name, name_len,
 352                             k_strncpy_always_add_null );
 353
 354       vg_info( "client #%d changed name to: %s [%s]\n", client_id,
 355                client->username, prop->name );
 356
 357       u32 propsize = sizeof(netmsg_playerusername) + chs + 1;
 358       gameserver_send_to_all( client_id, prop, propsize,
 359                               k_nSteamNetworkingSend_Reliable );
 360    }
 361    else if( tmp->inetmsg_id == k_inetmsg_playerframe ){
 362       /* propogate */
 363       netmsg_playerframe *frame = alloca(msg->m_cbSize);
 364       memcpy( frame, msg->m_pData, msg->m_cbSize );
 365       frame->client = client_id;
 366       gameserver_send_to_all( client_id, frame, msg->m_cbSize,
 367                               k_nSteamNetworkingSend_Unreliable );
 368    }
 369    else if( tmp->inetmsg_id == k_inetmsg_playeritem ){
 370       netmsg_playeritem *item = alloca(msg->m_cbSize);
 371       memcpy( item, msg->m_pData, msg->m_cbSize );
 372       item->client = client_id;
 373
 374       vg_info( "Client #%u equiped: [%u] %s\n",
 375                item->client, item->type, item->uid );
 376
 377       gameserver_send_to_all( client_id, item, msg->m_cbSize,
 378                               k_nSteamNetworkingSend_Reliable );
 379    }
 380 }
 381
 382 #if 0
 383 static void on_inet_score_request( SteamNetworkingMessage_t *msg ){
 384    if( !inet_require_auth(msg) ) return;
 385
 386    SteamAPI_ISteamNetworkingSockets_SendMessageToConnection(
 387          hSteamNetworkingSockets, msg->m_conn,
 388          &scoreboard_client_data, sizeof(netmsg_scoreboard),
 389          k_nSteamNetworkingSend_Reliable, NULL );
 390 }
 391
 392 static void on_inet_set_nickname( SteamNetworkingMessage_t *msg ){
 393    if(!inet_require_auth(msg)) return;
 394
 395    u64_steamid steamid = get_connection_authsteamid(msg);
 396    netmsg_set_nickname *setnick = msg->m_pData;
 397    if( msg->m_cbSize < sizeof(netmsg_set_nickname) ){
 398       vg_warn( "Invalid nickname request from client: %u, steamid: %lu\n",
 399             msg->m_conn, steamid );
 400       return;
 401    }
 402
 403    highscore_set_user_nickname( steamid, setnick->nickname );
 404 }
 405
 406 static void on_inet_set_score( SteamNetworkingMessage_t *msg ){
 407    if(!inet_require_auth(msg)) return;
 408
 409    u64_steamid steamid = get_connection_authsteamid(msg);
 410
 411    if( msg->m_cbSize < sizeof(netmsg_set_score) ){
 412       vg_warn( "Invalid set score post from client: %u, steamid: %lu\n",
 413             msg->m_conn, steamid );
 414       return;
 415    }
 416
 417    netmsg_set_score *info = msg->m_pData;
 418
 419    if( msg->m_cbSize < sizeof(netmsg_set_score) +
 420                        sizeof(struct netmsg_score_record)*info->record_count ){
 421       vg_warn( "Malformed set score post from client: %u, steamid: %lu\n",
 422             msg->m_conn, steamid );
 423       return;
 424    }
 425
 426    for( int i=0; i<info->record_count; i++ ){
 427       highscore_record temp;
 428       temp.trackid  = info->records[i].trackid;
 429       temp.datetime = time(NULL);
 430       temp.playerid = steamid;
 431       temp.points   = info->records[i].points;
 432       temp.time     = info->records[i].time;
 433
 434       highscores_push_record( &temp );
 435    }
 436 }
 437 #endif
 438
 439 static void poll_connections(void){
 440    SteamNetworkingMessage_t *messages[32];
 441    int len;
 442
 443    while(1){
 444       len = SteamAPI_ISteamNetworkingSockets_ReceiveMessagesOnPollGroup(
 445             hSteamNetworkingSockets,
 446             gameserver.client_group, messages, vg_list_size(messages) );
 447
 448       if( len <= 0 )
 449          return;
 450
 451       for( int i=0; i<len; i++ ){
 452          SteamNetworkingMessage_t *msg = messages[i];
 453
 454          if( msg->m_cbSize < sizeof(netmsg_blank) ){
 455             vg_warn( "Discarding message (too small: %d)\n",
 456                   msg->m_cbSize );
 457             continue;
 458          }
 459
 460          netmsg_blank *tmp = msg->m_pData;
 461
 462          if( (tmp->inetmsg_id >= 200) && (tmp->inetmsg_id < 300) ){
 463             gameserver_rx_200_300( msg );
 464          }
 465          else{
 466             if( tmp->inetmsg_id == k_inetmsg_auth )
 467                gameserver_rx_auth( msg );
 468 #if 0
 469             else if( tmp->inetmsg_id == k_inetmsg_scores_request )
 470                on_inet_score_request( msg );
 471             else if( tmp->inetmsg_id == k_inetmsg_set_nickname )
 472                on_inet_set_nickname( msg );
 473             else if( tmp->inetmsg_id == k_inetmsg_set_score )
 474                on_inet_set_score( msg );
 475             else if( tmp->inetmsg_id == k_inetmsg_playerframe )
 476                on_inet_playerframe( msg );
 477 #endif
 478             else {
 479                vg_warn( "Unknown inetmsg_id recieved from client. (%u)\n",
 480                         tmp->inetmsg_id );
 481             }
 482          }
 483
 484
 485          SteamAPI_SteamNetworkingMessage_t_Release( msg );
 486       }
 487    }
 488 }
 489
 490 static u64 seconds_to_server_ticks( double s ){
 491    return s / 0.01;
 492 }
 493
 494 static void generate_boards(void){
 495    FILE *fp = fopen( "www/html/srhighscores.txt", "w" );
 496
 497    if( !fp ){
 498       vg_error( "Can't write boards to www/html/srhighscores.txt\n" );
 499       return;
 500    }
 501
 502    for( int i=0; i<vg_list_size(track_infos); i++ ){
 503       struct netmsg_board *board = &scoreboard_client_data.boards[i];
 504
 505       highscores_board_generate( board->data, i, 10 );
 506       highscores_board_printf( fp, board->data, 10 );
 507    }
 508
 509    fclose( fp );
 510 }
 511
 512 int main( int argc, char *argv[] ){
 513    signal( SIGINT, inthandler );
 514    signal( SIGQUIT, inthandler );
 515    signal( SIGPIPE, SIG_IGN );
 516
 517    char *arg;
 518    while( vg_argp( argc, argv ) ){
 519       if( vg_long_opt( "noauth" ) )
 520          gameserver.auth_mode = eServerModeNoAuthentication;
 521    }
 522
 523    /* TODO: Options to override, ammend, remove etc */
 524
 525    vg_set_mem_quota( 80*1024*1024 );
 526    vg_alloc_quota();
 527
 528    highscores_init( 250000, 10000 );
 529
 530    if( !highscores_read() )
 531       highscores_create_db();
 532
 533    steamworks_ensure_txt( "2103940" );
 534
 535    if( gameserver.auth_mode == eServerModeAuthentication ){
 536       if( !vg_load_steam_symetric_key( "application_key",
 537                                        gameserver.app_symmetric_key )){
 538          return 0;
 539       }
 540    }
 541    else{
 542       vg_warn( "Running without user authentication.\n" );
 543    }
 544
 545    if( !SteamGameServer_Init( 0, 27400, 27401,
 546                               gameserver.auth_mode, "1.0.0.0" ) ){
 547       vg_error( "SteamGameServer_Init failed\n" );
 548       return 0;
 549    }
 550
 551    void *hSteamGameServer = SteamAPI_SteamGameServer();
 552    SteamAPI_ISteamGameServer_LogOnAnonymous( hSteamGameServer );
 553
 554    SteamAPI_ManualDispatch_Init();
 555    HSteamPipe hsteampipe = SteamGameServer_GetHSteamPipe();
 556
 557    //hSteamHTTP = SteamAPI_SteamGameServerHTTP();
 558    hSteamNetworkingSockets =
 559       SteamAPI_SteamGameServerNetworkingSockets_SteamAPI();
 560
 561    /*
 562     * Server code
 563     */
 564
 565    steam_register_callback( k_iSteamNetAuthenticationStatus, on_auth_status );
 566    steam_register_callback( k_iSteamNetConnectionStatusChangedCallBack,
 567                              on_connect_status );
 568
 569    vg_success( "Steamworks API running\n" );
 570    steamworks_event_loop( hsteampipe );
 571
 572    /*
 573     * Create a listener
 574     */
 575
 576    HSteamListenSocket listener;
 577    SteamNetworkingIPAddr localAddr;
 578    SteamAPI_SteamNetworkingIPAddr_Clear( &localAddr );
 579    localAddr.m_port = 27402;
 580
 581    listener = SteamAPI_ISteamNetworkingSockets_CreateListenSocketIP(
 582                   hSteamNetworkingSockets, &localAddr, 0, NULL );
 583    gameserver.client_group = SteamAPI_ISteamNetworkingSockets_CreatePollGroup(
 584          hSteamNetworkingSockets );
 585
 586    u64 server_ticks = 8000,
 587        last_record_save = 8000,
 588        last_scoreboard_gen = 0,
 589        last_monitor_heartbeat = 0;
 590
 591    generate_boards();
 592    monitor_start_server();
 593
 594    while( !sig_stop ){
 595       monitor_event_loop();
 596       steamworks_event_loop( hsteampipe );
 597       poll_connections();
 598
 599       usleep(10000);
 600       server_ticks ++;
 601
 602       if( server_ticks >
 603             (last_monitor_heartbeat + seconds_to_server_ticks(10.0))){
 604          last_monitor_heartbeat = server_ticks;
 605          monitor_heartbeat();
 606       }
 607
 608       if( server_ticks > last_scoreboard_gen + seconds_to_server_ticks(60.0) ){
 609          last_scoreboard_gen = server_ticks;
 610          generate_boards();
 611       }
 612
 613       if( server_ticks > last_record_save + seconds_to_server_ticks(10.0*60.0)){
 614          last_record_save = server_ticks;
 615          highscores_serialize_all();
 616       }
 617    }
 618
 619    highscores_serialize_all();
 620
 621    SteamAPI_ISteamNetworkingSockets_DestroyPollGroup( hSteamNetworkingSockets,
 622          gameserver.client_group );
 623    SteamAPI_ISteamNetworkingSockets_CloseListenSocket(
 624          hSteamNetworkingSockets, listener );
 625
 626    vg_info( "Shutting down\n..." );
 627    SteamGameServer_Shutdown();
 628
 629    return 0;
 630 }