1 // ============================================================================
2 // Rocks'n'Diamonds - McDuffin Strikes Back!
3 // ----------------------------------------------------------------------------
4 // (c) 1995-2014 by Artsoft Entertainment
7 // https://www.artsoft.org/
8 // ----------------------------------------------------------------------------
10 // ============================================================================
15 #include "libgame/libgame.h"
27 struct NetworkClientPlayerInfo
30 char name[MAX_PLAYER_NAME_LEN + 1];
31 struct NetworkClientPlayerInfo *next;
34 static struct NetworkClientPlayerInfo first_player =
43 static TCPsocket sfd; // TCP server socket
44 static UDPsocket udp; // UDP server socket
45 static SDLNet_SocketSet rfds; // socket set
47 static struct NetworkBuffer *read_buffer = NULL;
48 static struct NetworkBuffer *write_buffer = NULL;
50 static boolean stop_network_game = FALSE;
51 static boolean stop_network_client = FALSE;
52 static char stop_network_client_message[MAX_OUTPUT_LINESIZE + 1];
54 static struct NetworkLevelInfo network_level;
56 static void DrawNetworkTextExt(char *message, int font_nr, boolean initialize)
58 static int xpos = 0, ypos = 0;
59 static int max_line_width = 0;
60 int font_width = getFontWidth(font_nr);
61 int font_height = getFontHeight(font_nr);
67 if (game_status == GAME_MODE_LOADING)
69 max_line_width = WIN_XSIZE;
71 xpos = (max_line_width - getTextWidth(message, font_nr)) / 2;
74 DrawText(xpos, ypos, message, font_nr);
81 max_line_width = SXSIZE;
83 DrawTextSCentered(ypos_1, font_nr, message);
85 // calculate offset to x position caused by rounding
86 int max_chars_per_line = max_line_width / font_width;
87 int xoffset = (max_line_width - max_chars_per_line * font_width) / 2;
93 Debug("network:client", "========== %s ==========", message);
97 int max_chars_per_line = max_line_width / font_width;
98 int max_lines_per_text = 10;
99 int num_lines_spacing = (font_nr == FC_YELLOW ? 1 : 3);
100 int num_lines_printed = DrawTextBuffer(xpos, ypos, message, font_nr,
101 max_chars_per_line, -1,
102 max_lines_per_text, 0, -1,
105 ypos += (num_lines_printed + num_lines_spacing) * font_height;
107 Debug("network:client", "%s", message);
113 static void DrawNetworkText(char *message)
115 DrawNetworkTextExt(message, FC_YELLOW, FALSE);
118 static void DrawNetworkText_Success(char *message)
120 DrawNetworkTextExt(message, FC_GREEN, FALSE);
123 static void DrawNetworkText_Failed(char *message)
125 DrawNetworkTextExt(message, FC_RED, FALSE);
128 static void DrawNetworkText_Title(char *message)
130 DrawNetworkTextExt(message, FC_GREEN, TRUE);
133 static void SendNetworkBufferToServer(struct NetworkBuffer *nb)
135 if (!network.enabled)
138 // set message length header
139 putNetwork32BitInteger(nb->buffer, nb->size - 4);
141 // directly send the buffer to the network server
142 SDLNet_TCP_Send(sfd, nb->buffer, nb->size);
145 static struct NetworkClientPlayerInfo *getNetworkPlayer(int player_nr)
147 struct NetworkClientPlayerInfo *player = NULL;
149 for (player = &first_player; player; player = player->next)
150 if (player->nr == player_nr)
153 if (player == NULL) // should not happen
154 Error(ERR_EXIT, "protocol error: reference to non-existing player %d",
160 char *getNetworkPlayerName(int player_nr)
162 struct NetworkClientPlayerInfo *player;
165 return("the network game server");
166 else if (player_nr == first_player.nr)
169 for (player = &first_player; player; player = player->next)
170 if (player->nr == player_nr && strlen(player->name) > 0)
171 return(player->name);
173 return(EMPTY_PLAYER_NAME);
176 boolean hasStartedNetworkGame(void)
178 return !network_level.use_network_level_files;
181 static boolean hasPathSeparator(char *s)
183 return (strchr(s, '/') != NULL);
186 static void StartNetworkServer(int port)
192 network.server_thread = SDL_CreateThread(NetworkServerThread,
193 "NetworkServerThread", &p);
196 boolean ConnectToServer(char *hostname, int port)
202 if (read_buffer == NULL)
203 read_buffer = newNetworkBuffer();
205 if (write_buffer == NULL)
206 write_buffer = newNetworkBuffer();
208 DrawNetworkText_Title("Initializing Network");
211 port = DEFAULT_SERVER_PORT;
213 if (hostname == NULL)
215 // if no hostname given, try to auto-detect network server in local network
216 // by doing a UDP broadcast on the network server port and wait for answer
218 SDLNet_SocketSet udp_socket_set = SDLNet_AllocSocketSet(1);
220 Error(ERR_EXIT, "SDLNet_AllocSocketSet() failed: %s"), SDLNet_GetError();
222 udp = SDLNet_UDP_Open(0);
224 Error(ERR_EXIT, "SDLNet_UDP_Open() failed: %s", SDLNet_GetError());
226 if (SDLNet_UDP_AddSocket(udp_socket_set, udp) == -1)
227 Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_TCP_AddSocket() failed: %s"),
230 char *data_ptr = "network server UDB broadcast";
231 int data_len = strlen(data_ptr) + 1;
232 IPaddress ip_address;
234 SDLNet_Write32(0xffffffff, &ip_address.host); // 255.255.255.255
235 SDLNet_Write16(port, &ip_address.port);
247 SDLNet_UDP_Send(udp, -1, &packet);
249 DrawNetworkText("Looking for nearby network server ...");
251 // wait for any nearby network server to answer UDP broadcast
252 for (i = 0; i < 5; i++)
254 if (SDLNet_CheckSockets(udp_socket_set, 0) == 1)
256 int num_packets = SDLNet_UDP_Recv(udp, &packet);
258 if (num_packets == 1)
262 server_host = SDLNet_Read32(&packet.address.host);
264 sprintf(message, "Network server found at %d.%d.%d.%d!",
265 (server_host >> 24) & 0xff,
266 (server_host >> 16) & 0xff,
267 (server_host >> 8) & 0xff,
268 (server_host >> 0) & 0xff);
270 DrawNetworkText_Success(message);
274 DrawNetworkText_Failed("No answer from network server!");
281 Delay_WithScreenUpdates(100);
285 if (server_host == 0)
286 DrawNetworkText_Failed("No nearby network server found!");
289 rfds = SDLNet_AllocSocketSet(1);
295 SDLNet_ResolveHost(&ip, hostname, port);
297 if (ip.host == INADDR_NONE)
299 sprintf(message, "Failed to resolve network server hostname '%s'!",
302 DrawNetworkText_Failed(message);
308 server_host = SDLNet_Read32(&ip.host);
311 sprintf(message, "Connecting to network server host %s ...", hostname);
313 DrawNetworkText(message);
317 // if no hostname was given and no network server was auto-detected in the
318 // local network, try to connect to a network server at the local host
319 if (server_host == 0)
321 server_host = 0x7f000001; // 127.0.0.1
323 DrawNetworkText("Looking for local network server ...");
327 DrawNetworkText("Connecting to network server ...");
330 SDLNet_Write32(server_host, &ip.host);
331 SDLNet_Write16(port, &ip.port);
334 Debug("network:client", "trying to connect to network server at %d.%d.%d.%d ...",
335 (server_host >> 24) & 0xff,
336 (server_host >> 16) & 0xff,
337 (server_host >> 8) & 0xff,
338 (server_host >> 0) & 0xff);
340 sfd = SDLNet_TCP_Open(&ip);
344 SDLNet_TCP_AddSocket(rfds, sfd);
346 DrawNetworkText_Success("Successfully connected!");
353 DrawNetworkText_Failed("Failed to connect to network server!");
355 DrawNetworkText_Failed("No local network server found!");
357 Debug("network:client", "SDLNet_TCP_Open(): %s", SDLNet_GetError());
360 if (hostname) // connect to specified server failed
363 DrawNetworkText("Starting new local network server ...");
365 StartNetworkServer(port);
367 // wait for server to start up and try connecting several times
368 for (i = 0; i < 30; i++)
370 if ((sfd = SDLNet_TCP_Open(&ip))) // connected
372 DrawNetworkText_Success("Successfully connected to newly started network server!");
374 SDLNet_TCP_AddSocket(rfds, sfd);
379 Delay_WithScreenUpdates(100);
382 DrawNetworkText_Failed("Failed to connect to newly started network server!");
384 // when reaching this point, connect to newly started server has failed
388 void SendToServer_PlayerName(char *player_name)
390 initNetworkBufferForWriting(write_buffer, OP_PLAYER_NAME, 0);
392 putNetworkBufferString(write_buffer, player_name);
394 SendNetworkBufferToServer(write_buffer);
396 Debug("network:client", "you set your player name to \"%s\"", player_name);
399 void SendToServer_ProtocolVersion(void)
401 initNetworkBufferForWriting(write_buffer, OP_PROTOCOL_VERSION, 0);
403 putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_MAJOR);
404 putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_MINOR);
405 putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_PATCH);
407 SendNetworkBufferToServer(write_buffer);
410 void SendToServer_NrWanted(int nr_wanted)
412 initNetworkBufferForWriting(write_buffer, OP_NUMBER_WANTED, 0);
414 putNetworkBuffer8BitInteger(write_buffer, nr_wanted);
416 SendNetworkBufferToServer(write_buffer);
419 void SendToServer_LevelFile(void)
421 initNetworkBufferForWriting(write_buffer, OP_LEVEL_FILE, 0);
423 putNetworkBufferString( write_buffer, leveldir_current->identifier);
424 putNetworkBuffer16BitInteger(write_buffer, level.file_info.nr);
425 putNetworkBuffer8BitInteger( write_buffer, level.file_info.type);
426 putNetworkBuffer8BitInteger( write_buffer, level.file_info.packed);
427 putNetworkBufferString( write_buffer, level.file_info.basename);
428 putNetworkBufferFile( write_buffer, level.file_info.filename);
429 putNetworkBuffer8BitInteger( write_buffer, level.use_custom_template);
431 if (level.use_custom_template)
433 putNetworkBufferString(write_buffer, level_template.file_info.basename);
434 putNetworkBufferFile( write_buffer, level_template.file_info.filename);
437 SendNetworkBufferToServer(write_buffer);
439 setString(&network_level.leveldir_identifier, leveldir_current->identifier);
441 // the sending client does not use network level files (but the real ones)
442 network_level.use_network_level_files = FALSE;
445 Debug("network:client", "'%s'", leveldir_current->identifier);
446 Debug("network:client", "'%d'", level.file_info.nr);
447 Debug("network:client", "'%d'", level.file_info.type);
448 Debug("network:client", "'%d'", level.file_info.packed);
449 Debug("network:client", "'%s'", level.file_info.basename);
450 Debug("network:client", "'%s'", level.file_info.filename);
452 if (level.use_custom_template)
453 Debug("network:client", "'%s'", level_template.file_info.filename);
457 void SendToServer_StartPlaying(void)
459 unsigned int new_random_seed = InitRND(level.random_seed);
461 initNetworkBufferForWriting(write_buffer, OP_START_PLAYING, 0);
463 putNetworkBufferString( write_buffer, leveldir_current->identifier);
464 putNetworkBuffer16BitInteger(write_buffer, level_nr);
465 putNetworkBuffer32BitInteger(write_buffer, new_random_seed);
467 SendNetworkBufferToServer(write_buffer);
470 void SendToServer_PausePlaying(void)
472 initNetworkBufferForWriting(write_buffer, OP_PAUSE_PLAYING, 0);
474 SendNetworkBufferToServer(write_buffer);
477 void SendToServer_ContinuePlaying(void)
479 initNetworkBufferForWriting(write_buffer, OP_CONTINUE_PLAYING, 0);
481 SendNetworkBufferToServer(write_buffer);
484 void SendToServer_StopPlaying(int cause_for_stopping)
486 initNetworkBufferForWriting(write_buffer, OP_STOP_PLAYING, 0);
488 putNetworkBuffer8BitInteger(write_buffer, cause_for_stopping);
490 SendNetworkBufferToServer(write_buffer);
493 void SendToServer_MovePlayer(byte player_action)
495 initNetworkBufferForWriting(write_buffer, OP_MOVE_PLAYER, 0);
497 putNetworkBuffer8BitInteger(write_buffer, player_action);
499 SendNetworkBufferToServer(write_buffer);
502 static void Handle_OP_BAD_PROTOCOL_VERSION(void)
504 int protocol_version_major = getNetworkBuffer8BitInteger(read_buffer);
505 int protocol_version_minor = getNetworkBuffer8BitInteger(read_buffer);
507 Warn("protocol version mismatch");
508 Warn("server expects %d.%d.x instead of %d.%d.%d",
509 protocol_version_major,
510 protocol_version_minor,
511 PROTOCOL_VERSION_MAJOR,
512 PROTOCOL_VERSION_MINOR,
513 PROTOCOL_VERSION_PATCH);
515 sprintf(stop_network_client_message, "Network protocol version mismatch! Server expects version %d.%d.x instead of %d.%d.%d!",
516 protocol_version_major,
517 protocol_version_minor,
518 PROTOCOL_VERSION_MAJOR,
519 PROTOCOL_VERSION_MINOR,
520 PROTOCOL_VERSION_PATCH);
522 stop_network_client = TRUE;
525 static void Handle_OP_YOUR_NUMBER(void)
527 int old_client_nr = getNetworkBuffer8BitInteger(read_buffer);
528 int new_client_nr = getNetworkBuffer8BitInteger(read_buffer);
529 int new_index_nr = new_client_nr - 1;
530 struct PlayerInfo *old_local_player = local_player;
531 struct PlayerInfo *new_local_player = &stored_player[new_index_nr];
533 Debug("network:client", "OP_YOUR_NUMBER: %d", old_client_nr);
535 first_player.nr = new_client_nr;
537 if (old_local_player != new_local_player)
539 // set relevant player settings and change to new player
541 local_player = new_local_player;
543 old_local_player->connected_locally = FALSE;
544 new_local_player->connected_locally = TRUE;
546 old_local_player->connected_network = FALSE;
547 new_local_player->connected_network = TRUE;
550 if (first_player.nr > MAX_PLAYERS)
551 Error(ERR_EXIT, "sorry, more than %d players not allowed", MAX_PLAYERS);
553 Debug("network:client", "you get client # %d", new_client_nr);
555 stored_player[new_index_nr].connected_network = TRUE;
558 static void Handle_OP_NUMBER_WANTED(void)
560 int old_client_nr = getNetworkBuffer8BitInteger(read_buffer);
561 int client_nr_wanted = getNetworkBuffer8BitInteger(read_buffer);
562 int new_client_nr = getNetworkBuffer8BitInteger(read_buffer);
563 int old_index_nr = old_client_nr - 1;
564 int new_index_nr = new_client_nr - 1;
565 int index_nr_wanted = client_nr_wanted - 1;
566 struct PlayerInfo *old_player = &stored_player[old_index_nr];
567 struct PlayerInfo *new_player = &stored_player[new_index_nr];
569 Debug("network:client", "OP_NUMBER_WANTED: %d", old_client_nr);
571 if (new_client_nr == client_nr_wanted) // switching succeeded
573 struct NetworkClientPlayerInfo *player;
575 if (old_client_nr != client_nr_wanted) // client's nr has changed
576 Debug("network:client", "client %d switches to # %d",
577 old_client_nr, new_client_nr);
578 else if (old_client_nr == first_player.nr) // local player keeps his nr
579 Debug("network:client", "keeping client # %d", new_client_nr);
581 if (old_client_nr != new_client_nr)
583 // set relevant player settings and change to new player
585 old_player->connected_network = FALSE;
586 new_player->connected_network = TRUE;
589 player = getNetworkPlayer(old_client_nr);
590 player->nr = new_client_nr;
592 if (old_player == local_player) // local player switched
594 local_player = new_player;
596 old_player->connected_locally = FALSE;
597 new_player->connected_locally = TRUE;
600 else if (old_client_nr == first_player.nr) // failed -- local player?
604 sprintf(request, "Sorry! Player %d already exists! You are player %d!",
605 index_nr_wanted + 1, new_index_nr + 1);
607 Request(request, REQ_CONFIRM);
609 Debug("network:client", "cannot switch -- you keep client # %d",
613 if (game_status == GAME_MODE_MAIN)
614 DrawNetworkPlayers();
617 static void Handle_OP_PLAYER_NAME(void)
619 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
620 char *player_name = getNetworkBufferString(read_buffer);
621 struct NetworkClientPlayerInfo *player = getNetworkPlayer(player_nr);
623 Debug("network:client", "OP_PLAYER_NAME: %d", player_nr);
625 strncpy(player->name, player_name, MAX_PLAYER_NAME_LEN);
626 player->name[MAX_PLAYER_NAME_LEN] = '\0';
628 Debug("network:client", "client %d calls itself \"%s\"",
629 player_nr, player->name);
632 static void Handle_OP_PLAYER_CONNECTED(void)
634 struct NetworkClientPlayerInfo *player, *last_player = NULL;
635 int new_client_nr = getNetworkBuffer8BitInteger(read_buffer);
636 int new_index_nr = new_client_nr - 1;
638 Debug("network:client", "OP_PLAYER_CONNECTED: %d", new_client_nr);
639 Debug("network:client", "new client %d connected", new_client_nr);
641 for (player = &first_player; player; player = player->next)
643 if (player->nr == new_client_nr)
644 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
646 last_player = player;
649 last_player->next = player =
650 checked_malloc(sizeof(struct NetworkClientPlayerInfo));
651 player->nr = new_client_nr;
652 player->name[0] = '\0';
655 stored_player[new_index_nr].connected_network = TRUE;
658 static void Handle_OP_PLAYER_DISCONNECTED(void)
660 struct NetworkClientPlayerInfo *player, *player_disconnected;
661 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
662 int index_nr = player_nr - 1;
664 Debug("network:client", "OP_PLAYER_DISCONNECTED: %d", player_nr);
665 Debug("network:client", "client %d (%s) disconnected",
666 player_nr, getNetworkPlayerName(player_nr));
668 player_disconnected = getNetworkPlayer(player_nr);
670 for (player = &first_player; player; player = player->next)
671 if (player->next == player_disconnected)
672 player->next = player_disconnected->next;
673 free(player_disconnected);
675 stored_player[index_nr].connected_locally = FALSE;
676 stored_player[index_nr].connected_network = FALSE;
678 if (game_status == GAME_MODE_PLAYING)
682 sprintf(message, "Player %d left network server! Network game stopped!",
685 Request(message, REQ_CONFIRM | REQ_STAY_CLOSED);
687 SetGameStatus(GAME_MODE_MAIN);
691 else if (game_status == GAME_MODE_MAIN)
693 DrawNetworkPlayers();
697 static void Handle_OP_START_PLAYING(void)
699 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
700 char *new_leveldir_identifier = getNetworkBufferString(read_buffer);
701 int new_level_nr = getNetworkBuffer16BitInteger(read_buffer);
702 unsigned int new_random_seed = getNetworkBuffer32BitInteger(read_buffer);
704 if (!strEqual(new_leveldir_identifier, network_level.leveldir_identifier))
706 Warn("no such level identifier: '%s'", new_leveldir_identifier);
708 stop_network_game = TRUE;
713 Debug("network:client", "OP_START_PLAYING: %d", player_nr);
714 Debug("network:client",
715 "client %d starts game [level %d from level identifier '%s']",
716 player_nr, new_level_nr, new_leveldir_identifier);
718 LevelDirTree *new_leveldir =
719 getTreeInfoFromIdentifier(leveldir_first, new_leveldir_identifier);
721 if (new_leveldir != NULL)
723 leveldir_current = new_leveldir;
724 level_nr = new_level_nr;
727 // needed if level set of network game changed graphics, sounds or music
728 ReloadCustomArtwork(0);
732 if (network_level.use_network_level_files)
733 LoadNetworkLevel(&network_level);
737 StartGameActions(FALSE, setup.autorecord, new_random_seed);
740 static void Handle_OP_PAUSE_PLAYING(void)
742 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
744 Debug("network:client", "OP_PAUSE_PLAYING: %d", player_nr);
745 Debug("network:client", "client %d pauses game", player_nr);
747 if (game_status == GAME_MODE_PLAYING)
750 DrawVideoDisplay(VIDEO_STATE_PAUSE_ON, 0);
754 static void Handle_OP_CONTINUE_PLAYING(void)
756 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
758 Debug("network:client", "OP_CONTINUE_PLAYING: %d", player_nr);
759 Debug("network:client", "client %d continues game", player_nr);
761 if (game_status == GAME_MODE_PLAYING)
763 tape.pausing = FALSE;
764 DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF, 0);
768 static void Handle_OP_STOP_PLAYING(void)
770 int client_nr = getNetworkBuffer8BitInteger(read_buffer);
771 int cause_for_stopping = getNetworkBuffer8BitInteger(read_buffer);
773 Debug("network:client", "OP_STOP_PLAYING: %d [%d]",
774 client_nr, cause_for_stopping);
775 Debug("network:client", "client %d stops game [%d]",
776 client_nr, cause_for_stopping);
778 if (game_status == GAME_MODE_PLAYING)
780 int index_nr = client_nr - 1;
781 struct PlayerInfo *client_player = &stored_player[index_nr];
782 boolean stopped_by_remote_player = (!client_player->connected_locally);
785 if (cause_for_stopping == NETWORK_STOP_BY_PLAYER)
786 sprintf(message, "Network game stopped by player %d!", client_nr);
788 sprintf(message, (cause_for_stopping == NETWORK_STOP_BY_ERROR ?
789 "Network game stopped due to internal error!" :
790 "Network game stopped!"));
792 if (cause_for_stopping != NETWORK_STOP_BY_PLAYER ||
793 stopped_by_remote_player)
794 Request(message, REQ_CONFIRM | REQ_STAY_CLOSED);
796 SetGameStatus(GAME_MODE_MAIN);
802 static void Handle_OP_MOVE_PLAYER(void)
804 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
805 int server_frame_counter = getNetworkBuffer32BitInteger(read_buffer);
808 if (!network_playing)
811 if (server_frame_counter != FrameCounter)
813 Warn("frame counters of client %d and server out of sync", player_nr);
814 Warn("frame counter of client is %d", FrameCounter);
815 Warn("frame counter of server is %d", server_frame_counter);
816 Warn("this should not happen -- please debug");
818 stop_network_game = TRUE;
823 // copy valid player actions (will be set to 0 for not connected players)
824 for (i = 0; i < MAX_PLAYERS; i++)
825 stored_player[i].effective_action =
826 getNetworkBuffer8BitInteger(read_buffer);
828 network_player_action_received = TRUE;
831 static void Handle_OP_BROADCAST_MESSAGE(void)
833 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
835 Debug("network:client", "OP_BROADCAST_MESSAGE: %d", player_nr);
836 Debug("network:client", "client %d sends message", player_nr);
839 static void Handle_OP_LEVEL_FILE(void)
841 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
842 char *leveldir_identifier;
843 char *network_level_dir;
844 struct LevelFileInfo *file_info = &network_level.file_info;
845 struct LevelFileInfo *tmpl_info = &network_level.tmpl_info;
846 boolean use_custom_template;
848 setString(&network_level.leveldir_identifier, NULL);
849 setString(&network_level.file_info.basename, NULL);
850 setString(&network_level.file_info.filename, NULL);
851 setString(&network_level.tmpl_info.basename, NULL);
852 setString(&network_level.tmpl_info.filename, NULL);
854 Debug("network:client", "OP_LEVEL_FILE: %d", player_nr);
856 leveldir_identifier = getStringCopy(getNetworkBufferString(read_buffer));
858 if (hasPathSeparator(leveldir_identifier))
859 Error(ERR_EXIT, "protocol error: invalid filename from network client");
861 InitNetworkLevelDirectory(leveldir_identifier);
863 network_level_dir = getNetworkLevelDir(leveldir_identifier);
865 file_info->nr = getNetworkBuffer16BitInteger(read_buffer);
866 file_info->type = getNetworkBuffer8BitInteger(read_buffer);
867 file_info->packed = getNetworkBuffer8BitInteger(read_buffer);
868 file_info->basename = getStringCopy(getNetworkBufferString(read_buffer));
869 file_info->filename = getPath2(network_level_dir, file_info->basename);
871 if (hasPathSeparator(file_info->basename))
872 Error(ERR_EXIT, "protocol error: invalid filename from network client");
874 int num_bytes = getNetworkBufferFile(read_buffer, file_info->filename);
876 // if received level file is empty, remove it (as being non-existent)
878 remove(file_info->filename);
880 use_custom_template = getNetworkBuffer8BitInteger(read_buffer);
881 if (use_custom_template)
883 *tmpl_info = *file_info;
885 tmpl_info->basename = getStringCopy(getNetworkBufferString(read_buffer));
886 tmpl_info->filename = getPath2(network_level_dir, tmpl_info->basename);
888 if (hasPathSeparator(tmpl_info->basename))
889 Error(ERR_EXIT, "protocol error: invalid filename from network client");
891 getNetworkBufferFile(read_buffer, tmpl_info->filename);
893 // if received level file is empty, use level template file instead
895 setString(&file_info->filename, tmpl_info->filename);
898 network_level.leveldir_identifier = leveldir_identifier;
899 network_level.use_custom_template = use_custom_template;
901 // the receiving client(s) use(s) the transferred network level files
902 network_level.use_network_level_files = TRUE;
905 Debug("network:client", "'%s'", leveldir_identifier);
906 Debug("network:client", "'%d'", file_info->nr);
907 Debug("network:client", "'%d'", file_info->type);
908 Debug("network:client", "'%d'", file_info->packed);
909 Debug("network:client", "'%s'", file_info->basename);
910 Debug("network:client", "'%s'", file_info->filename);
912 if (use_custom_template)
913 Debug("network:client", "'%s'", tmpl_info->filename);
917 static void HandleNetworkingMessage(void)
919 stop_network_game = FALSE;
921 initNetworkBufferForReading(read_buffer);
923 int message_type = getNetworkBuffer8BitInteger(read_buffer);
925 switch (message_type)
927 case OP_BAD_PROTOCOL_VERSION:
928 Handle_OP_BAD_PROTOCOL_VERSION();
932 Handle_OP_YOUR_NUMBER();
935 case OP_NUMBER_WANTED:
936 Handle_OP_NUMBER_WANTED();
940 Handle_OP_PLAYER_NAME();
943 case OP_PLAYER_CONNECTED:
944 Handle_OP_PLAYER_CONNECTED();
947 case OP_PLAYER_DISCONNECTED:
948 Handle_OP_PLAYER_DISCONNECTED();
951 case OP_START_PLAYING:
952 Handle_OP_START_PLAYING();
955 case OP_PAUSE_PLAYING:
956 Handle_OP_PAUSE_PLAYING();
959 case OP_CONTINUE_PLAYING:
960 Handle_OP_CONTINUE_PLAYING();
963 case OP_STOP_PLAYING:
964 Handle_OP_STOP_PLAYING();
968 Handle_OP_MOVE_PLAYER();
971 case OP_BROADCAST_MESSAGE:
972 Handle_OP_BROADCAST_MESSAGE();
976 Handle_OP_LEVEL_FILE();
980 Debug("network:client", "unknown opcode %d from server", message_type);
985 // in case of internal error, stop network game
986 if (stop_network_game)
987 SendToServer_StopPlaying(NETWORK_STOP_BY_ERROR);
990 static char *HandleNetworkingPackets(void)
994 // ---------- check network server for activity ----------
996 int num_active_sockets = SDLNet_CheckSockets(rfds, 0);
998 if (num_active_sockets < 0)
999 return "Error checking network sockets!";
1001 if (num_active_sockets == 0)
1002 break; // no active sockets, stop here
1004 // ---------- read packets from network server ----------
1006 initNetworkBufferForReceiving(read_buffer);
1008 int num_bytes = receiveNetworkBufferPacket(read_buffer, sfd);
1011 return "Error reading from network server!";
1014 return "Connection to network server lost!";
1016 HandleNetworkingMessage();
1018 if (stop_network_client)
1019 return stop_network_client_message;
1025 static void FreeNetworkClientPlayerInfo(struct NetworkClientPlayerInfo *player)
1031 FreeNetworkClientPlayerInfo(player->next);
1033 checked_free(player);
1036 static void HandleNetworkingDisconnect(void)
1040 SDLNet_TCP_DelSocket(rfds, sfd);
1041 SDLNet_TCP_Close(sfd);
1043 network_playing = FALSE;
1045 network.enabled = FALSE;
1046 network.connected = FALSE;
1048 setup.network_mode = FALSE;
1050 for (i = 0; i < MAX_PLAYERS; i++)
1051 stored_player[i].connected_network = FALSE;
1053 FreeNetworkClientPlayerInfo(first_player.next);
1055 first_player.nr = 0;
1056 first_player.next = NULL;
1059 void HandleNetworking(void)
1061 // do not handle any networking packets if request dialog is active
1062 if (game.request_active)
1065 char *error_message = HandleNetworkingPackets();
1067 if (error_message != NULL)
1069 HandleNetworkingDisconnect();
1071 if (game_status == GAME_MODE_PLAYING)
1073 Request(error_message, REQ_CONFIRM | REQ_STAY_CLOSED);
1075 SetGameStatus(GAME_MODE_MAIN);
1081 Request(error_message, REQ_CONFIRM);
1083 if (game_status == GAME_MODE_MAIN)
1084 ClearNetworkPlayers();
1089 void DisconnectFromNetworkServer(void)
1091 DrawNetworkText_Title("Terminating Network");
1092 DrawNetworkText("Disconnecting from network server ...");
1094 HandleNetworkingDisconnect();
1096 DrawNetworkText_Success("Successfully disconnected!");