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 server_thread = SDL_CreateThread(NetworkServerThread,
193 "NetworkServerThread", &p);
194 network_server = TRUE;
197 boolean ConnectToServer(char *hostname, int port)
203 if (read_buffer == NULL)
204 read_buffer = newNetworkBuffer();
206 if (write_buffer == NULL)
207 write_buffer = newNetworkBuffer();
209 DrawNetworkText_Title("Initializing Network");
212 port = DEFAULT_SERVER_PORT;
214 if (hostname == NULL)
216 // if no hostname given, try to auto-detect network server in local network
217 // by doing a UDP broadcast on the network server port and wait for answer
219 SDLNet_SocketSet udp_socket_set = SDLNet_AllocSocketSet(1);
221 Error(ERR_EXIT, "SDLNet_AllocSocketSet() failed: %s"), SDLNet_GetError();
223 udp = SDLNet_UDP_Open(0);
225 Error(ERR_EXIT, "SDLNet_UDP_Open() failed: %s", SDLNet_GetError());
227 if (SDLNet_UDP_AddSocket(udp_socket_set, udp) == -1)
228 Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_TCP_AddSocket() failed: %s"),
231 char *data_ptr = "network server UDB broadcast";
232 int data_len = strlen(data_ptr) + 1;
233 IPaddress ip_address;
235 SDLNet_Write32(0xffffffff, &ip_address.host); // 255.255.255.255
236 SDLNet_Write16(port, &ip_address.port);
248 SDLNet_UDP_Send(udp, -1, &packet);
250 DrawNetworkText("Looking for nearby network server ...");
252 // wait for any nearby network server to answer UDP broadcast
253 for (i = 0; i < 5; i++)
255 if (SDLNet_CheckSockets(udp_socket_set, 0) == 1)
257 int num_packets = SDLNet_UDP_Recv(udp, &packet);
259 if (num_packets == 1)
263 server_host = SDLNet_Read32(&packet.address.host);
265 sprintf(message, "Network server found at %d.%d.%d.%d!",
266 (server_host >> 24) & 0xff,
267 (server_host >> 16) & 0xff,
268 (server_host >> 8) & 0xff,
269 (server_host >> 0) & 0xff);
271 DrawNetworkText_Success(message);
275 DrawNetworkText_Failed("No answer from network server!");
282 Delay_WithScreenUpdates(100);
286 if (server_host == 0)
287 DrawNetworkText_Failed("No nearby network server found!");
290 rfds = SDLNet_AllocSocketSet(1);
296 SDLNet_ResolveHost(&ip, hostname, port);
298 if (ip.host == INADDR_NONE)
300 sprintf(message, "Failed to resolve network server hostname '%s'!",
303 DrawNetworkText_Failed(message);
309 server_host = SDLNet_Read32(&ip.host);
312 sprintf(message, "Connecting to network server host %s ...", hostname);
314 DrawNetworkText(message);
318 // if no hostname was given and no network server was auto-detected in the
319 // local network, try to connect to a network server at the local host
320 if (server_host == 0)
322 server_host = 0x7f000001; // 127.0.0.1
324 DrawNetworkText("Looking for local network server ...");
328 DrawNetworkText("Connecting to network server ...");
331 SDLNet_Write32(server_host, &ip.host);
332 SDLNet_Write16(port, &ip.port);
335 Debug("network:client", "trying to connect to network server at %d.%d.%d.%d ...",
336 (server_host >> 24) & 0xff,
337 (server_host >> 16) & 0xff,
338 (server_host >> 8) & 0xff,
339 (server_host >> 0) & 0xff);
341 sfd = SDLNet_TCP_Open(&ip);
345 SDLNet_TCP_AddSocket(rfds, sfd);
347 DrawNetworkText_Success("Successfully connected!");
354 DrawNetworkText_Failed("Failed to connect to network server!");
356 DrawNetworkText_Failed("No local network server found!");
358 Debug("network:client", "SDLNet_TCP_Open(): %s", SDLNet_GetError());
361 if (hostname) // connect to specified server failed
364 DrawNetworkText("Starting new local network server ...");
366 StartNetworkServer(port);
368 // wait for server to start up and try connecting several times
369 for (i = 0; i < 30; i++)
371 if ((sfd = SDLNet_TCP_Open(&ip))) // connected
373 DrawNetworkText_Success("Successfully connected to newly started network server!");
375 SDLNet_TCP_AddSocket(rfds, sfd);
380 Delay_WithScreenUpdates(100);
383 DrawNetworkText_Failed("Failed to connect to newly started network server!");
385 // when reaching this point, connect to newly started server has failed
389 void SendToServer_PlayerName(char *player_name)
391 initNetworkBufferForWriting(write_buffer, OP_PLAYER_NAME, 0);
393 putNetworkBufferString(write_buffer, player_name);
395 SendNetworkBufferToServer(write_buffer);
397 Debug("network:client", "you set your player name to \"%s\"", player_name);
400 void SendToServer_ProtocolVersion(void)
402 initNetworkBufferForWriting(write_buffer, OP_PROTOCOL_VERSION, 0);
404 putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_MAJOR);
405 putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_MINOR);
406 putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_PATCH);
408 SendNetworkBufferToServer(write_buffer);
411 void SendToServer_NrWanted(int nr_wanted)
413 initNetworkBufferForWriting(write_buffer, OP_NUMBER_WANTED, 0);
415 putNetworkBuffer8BitInteger(write_buffer, nr_wanted);
417 SendNetworkBufferToServer(write_buffer);
420 void SendToServer_LevelFile(void)
422 initNetworkBufferForWriting(write_buffer, OP_LEVEL_FILE, 0);
424 putNetworkBufferString( write_buffer, leveldir_current->identifier);
425 putNetworkBuffer16BitInteger(write_buffer, level.file_info.nr);
426 putNetworkBuffer8BitInteger( write_buffer, level.file_info.type);
427 putNetworkBuffer8BitInteger( write_buffer, level.file_info.packed);
428 putNetworkBufferString( write_buffer, level.file_info.basename);
429 putNetworkBufferFile( write_buffer, level.file_info.filename);
430 putNetworkBuffer8BitInteger( write_buffer, level.use_custom_template);
432 if (level.use_custom_template)
434 putNetworkBufferString(write_buffer, level_template.file_info.basename);
435 putNetworkBufferFile( write_buffer, level_template.file_info.filename);
438 SendNetworkBufferToServer(write_buffer);
440 setString(&network_level.leveldir_identifier, leveldir_current->identifier);
442 // the sending client does not use network level files (but the real ones)
443 network_level.use_network_level_files = FALSE;
446 Debug("network:client", "'%s'", leveldir_current->identifier);
447 Debug("network:client", "'%d'", level.file_info.nr);
448 Debug("network:client", "'%d'", level.file_info.type);
449 Debug("network:client", "'%d'", level.file_info.packed);
450 Debug("network:client", "'%s'", level.file_info.basename);
451 Debug("network:client", "'%s'", level.file_info.filename);
453 if (level.use_custom_template)
454 Debug("network:client", "'%s'", level_template.file_info.filename);
458 void SendToServer_StartPlaying(void)
460 unsigned int new_random_seed = InitRND(level.random_seed);
462 initNetworkBufferForWriting(write_buffer, OP_START_PLAYING, 0);
464 putNetworkBufferString( write_buffer, leveldir_current->identifier);
465 putNetworkBuffer16BitInteger(write_buffer, level_nr);
466 putNetworkBuffer32BitInteger(write_buffer, new_random_seed);
468 SendNetworkBufferToServer(write_buffer);
471 void SendToServer_PausePlaying(void)
473 initNetworkBufferForWriting(write_buffer, OP_PAUSE_PLAYING, 0);
475 SendNetworkBufferToServer(write_buffer);
478 void SendToServer_ContinuePlaying(void)
480 initNetworkBufferForWriting(write_buffer, OP_CONTINUE_PLAYING, 0);
482 SendNetworkBufferToServer(write_buffer);
485 void SendToServer_StopPlaying(int cause_for_stopping)
487 initNetworkBufferForWriting(write_buffer, OP_STOP_PLAYING, 0);
489 putNetworkBuffer8BitInteger(write_buffer, cause_for_stopping);
491 SendNetworkBufferToServer(write_buffer);
494 void SendToServer_MovePlayer(byte player_action)
496 initNetworkBufferForWriting(write_buffer, OP_MOVE_PLAYER, 0);
498 putNetworkBuffer8BitInteger(write_buffer, player_action);
500 SendNetworkBufferToServer(write_buffer);
503 static void Handle_OP_BAD_PROTOCOL_VERSION(void)
505 int protocol_version_major = getNetworkBuffer8BitInteger(read_buffer);
506 int protocol_version_minor = getNetworkBuffer8BitInteger(read_buffer);
508 Warn("protocol version mismatch");
509 Warn("server expects %d.%d.x instead of %d.%d.%d",
510 protocol_version_major,
511 protocol_version_minor,
512 PROTOCOL_VERSION_MAJOR,
513 PROTOCOL_VERSION_MINOR,
514 PROTOCOL_VERSION_PATCH);
516 sprintf(stop_network_client_message, "Network protocol version mismatch! Server expects version %d.%d.x instead of %d.%d.%d!",
517 protocol_version_major,
518 protocol_version_minor,
519 PROTOCOL_VERSION_MAJOR,
520 PROTOCOL_VERSION_MINOR,
521 PROTOCOL_VERSION_PATCH);
523 stop_network_client = TRUE;
526 static void Handle_OP_YOUR_NUMBER(void)
528 int old_client_nr = getNetworkBuffer8BitInteger(read_buffer);
529 int new_client_nr = getNetworkBuffer8BitInteger(read_buffer);
530 int new_index_nr = new_client_nr - 1;
531 struct PlayerInfo *old_local_player = local_player;
532 struct PlayerInfo *new_local_player = &stored_player[new_index_nr];
534 Debug("network:client", "OP_YOUR_NUMBER: %d", old_client_nr);
536 first_player.nr = new_client_nr;
538 if (old_local_player != new_local_player)
540 // set relevant player settings and change to new player
542 local_player = new_local_player;
544 old_local_player->connected_locally = FALSE;
545 new_local_player->connected_locally = TRUE;
547 old_local_player->connected_network = FALSE;
548 new_local_player->connected_network = TRUE;
551 if (first_player.nr > MAX_PLAYERS)
552 Error(ERR_EXIT, "sorry, more than %d players not allowed", MAX_PLAYERS);
554 Debug("network:client", "you get client # %d", new_client_nr);
556 stored_player[new_index_nr].connected_network = TRUE;
559 static void Handle_OP_NUMBER_WANTED(void)
561 int old_client_nr = getNetworkBuffer8BitInteger(read_buffer);
562 int client_nr_wanted = getNetworkBuffer8BitInteger(read_buffer);
563 int new_client_nr = getNetworkBuffer8BitInteger(read_buffer);
564 int old_index_nr = old_client_nr - 1;
565 int new_index_nr = new_client_nr - 1;
566 int index_nr_wanted = client_nr_wanted - 1;
567 struct PlayerInfo *old_player = &stored_player[old_index_nr];
568 struct PlayerInfo *new_player = &stored_player[new_index_nr];
570 Debug("network:client", "OP_NUMBER_WANTED: %d", old_client_nr);
572 if (new_client_nr == client_nr_wanted) // switching succeeded
574 struct NetworkClientPlayerInfo *player;
576 if (old_client_nr != client_nr_wanted) // client's nr has changed
577 Debug("network:client", "client %d switches to # %d",
578 old_client_nr, new_client_nr);
579 else if (old_client_nr == first_player.nr) // local player keeps his nr
580 Debug("network:client", "keeping client # %d", new_client_nr);
582 if (old_client_nr != new_client_nr)
584 // set relevant player settings and change to new player
586 old_player->connected_network = FALSE;
587 new_player->connected_network = TRUE;
590 player = getNetworkPlayer(old_client_nr);
591 player->nr = new_client_nr;
593 if (old_player == local_player) // local player switched
595 local_player = new_player;
597 old_player->connected_locally = FALSE;
598 new_player->connected_locally = TRUE;
601 else if (old_client_nr == first_player.nr) // failed -- local player?
605 sprintf(request, "Sorry! Player %d already exists! You are player %d!",
606 index_nr_wanted + 1, new_index_nr + 1);
608 Request(request, REQ_CONFIRM);
610 Debug("network:client", "cannot switch -- you keep client # %d",
614 if (game_status == GAME_MODE_MAIN)
615 DrawNetworkPlayers();
618 static void Handle_OP_PLAYER_NAME(void)
620 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
621 char *player_name = getNetworkBufferString(read_buffer);
622 struct NetworkClientPlayerInfo *player = getNetworkPlayer(player_nr);
624 Debug("network:client", "OP_PLAYER_NAME: %d", player_nr);
626 strncpy(player->name, player_name, MAX_PLAYER_NAME_LEN);
627 player->name[MAX_PLAYER_NAME_LEN] = '\0';
629 Debug("network:client", "client %d calls itself \"%s\"",
630 player_nr, player->name);
633 static void Handle_OP_PLAYER_CONNECTED(void)
635 struct NetworkClientPlayerInfo *player, *last_player = NULL;
636 int new_client_nr = getNetworkBuffer8BitInteger(read_buffer);
637 int new_index_nr = new_client_nr - 1;
639 Debug("network:client", "OP_PLAYER_CONNECTED: %d", new_client_nr);
640 Debug("network:client", "new client %d connected", new_client_nr);
642 for (player = &first_player; player; player = player->next)
644 if (player->nr == new_client_nr)
645 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
647 last_player = player;
650 last_player->next = player =
651 checked_malloc(sizeof(struct NetworkClientPlayerInfo));
652 player->nr = new_client_nr;
653 player->name[0] = '\0';
656 stored_player[new_index_nr].connected_network = TRUE;
659 static void Handle_OP_PLAYER_DISCONNECTED(void)
661 struct NetworkClientPlayerInfo *player, *player_disconnected;
662 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
663 int index_nr = player_nr - 1;
665 Debug("network:client", "OP_PLAYER_DISCONNECTED: %d", player_nr);
666 Debug("network:client", "client %d (%s) disconnected",
667 player_nr, getNetworkPlayerName(player_nr));
669 player_disconnected = getNetworkPlayer(player_nr);
671 for (player = &first_player; player; player = player->next)
672 if (player->next == player_disconnected)
673 player->next = player_disconnected->next;
674 free(player_disconnected);
676 stored_player[index_nr].connected_locally = FALSE;
677 stored_player[index_nr].connected_network = FALSE;
679 if (game_status == GAME_MODE_PLAYING)
683 sprintf(message, "Player %d left network server! Network game stopped!",
686 Request(message, REQ_CONFIRM | REQ_STAY_CLOSED);
688 SetGameStatus(GAME_MODE_MAIN);
692 else if (game_status == GAME_MODE_MAIN)
694 DrawNetworkPlayers();
698 static void Handle_OP_START_PLAYING(void)
700 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
701 char *new_leveldir_identifier = getNetworkBufferString(read_buffer);
702 int new_level_nr = getNetworkBuffer16BitInteger(read_buffer);
703 unsigned int new_random_seed = getNetworkBuffer32BitInteger(read_buffer);
705 if (!strEqual(new_leveldir_identifier, network_level.leveldir_identifier))
707 Warn("no such level identifier: '%s'", new_leveldir_identifier);
709 stop_network_game = TRUE;
714 Debug("network:client", "OP_START_PLAYING: %d", player_nr);
715 Debug("network:client",
716 "client %d starts game [level %d from level identifier '%s']",
717 player_nr, new_level_nr, new_leveldir_identifier);
719 LevelDirTree *new_leveldir =
720 getTreeInfoFromIdentifier(leveldir_first, new_leveldir_identifier);
722 if (new_leveldir != NULL)
724 leveldir_current = new_leveldir;
725 level_nr = new_level_nr;
728 // needed if level set of network game changed graphics, sounds or music
729 ReloadCustomArtwork(0);
733 if (network_level.use_network_level_files)
734 LoadNetworkLevel(&network_level);
738 StartGameActions(FALSE, setup.autorecord, new_random_seed);
741 static void Handle_OP_PAUSE_PLAYING(void)
743 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
745 Debug("network:client", "OP_PAUSE_PLAYING: %d", player_nr);
746 Debug("network:client", "client %d pauses game", player_nr);
748 if (game_status == GAME_MODE_PLAYING)
751 DrawVideoDisplay(VIDEO_STATE_PAUSE_ON, 0);
755 static void Handle_OP_CONTINUE_PLAYING(void)
757 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
759 Debug("network:client", "OP_CONTINUE_PLAYING: %d", player_nr);
760 Debug("network:client", "client %d continues game", player_nr);
762 if (game_status == GAME_MODE_PLAYING)
764 tape.pausing = FALSE;
765 DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF, 0);
769 static void Handle_OP_STOP_PLAYING(void)
771 int client_nr = getNetworkBuffer8BitInteger(read_buffer);
772 int cause_for_stopping = getNetworkBuffer8BitInteger(read_buffer);
774 Debug("network:client", "OP_STOP_PLAYING: %d [%d]",
775 client_nr, cause_for_stopping);
776 Debug("network:client", "client %d stops game [%d]",
777 client_nr, cause_for_stopping);
779 if (game_status == GAME_MODE_PLAYING)
781 int index_nr = client_nr - 1;
782 struct PlayerInfo *client_player = &stored_player[index_nr];
783 boolean stopped_by_remote_player = (!client_player->connected_locally);
786 if (cause_for_stopping == NETWORK_STOP_BY_PLAYER)
787 sprintf(message, "Network game stopped by player %d!", client_nr);
789 sprintf(message, (cause_for_stopping == NETWORK_STOP_BY_ERROR ?
790 "Network game stopped due to internal error!" :
791 "Network game stopped!"));
793 if (cause_for_stopping != NETWORK_STOP_BY_PLAYER ||
794 stopped_by_remote_player)
795 Request(message, REQ_CONFIRM | REQ_STAY_CLOSED);
797 SetGameStatus(GAME_MODE_MAIN);
803 static void Handle_OP_MOVE_PLAYER(void)
805 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
806 int server_frame_counter = getNetworkBuffer32BitInteger(read_buffer);
809 if (!network_playing)
812 if (server_frame_counter != FrameCounter)
814 Warn("frame counters of client %d and server out of sync", player_nr);
815 Warn("frame counter of client is %d", FrameCounter);
816 Warn("frame counter of server is %d", server_frame_counter);
817 Warn("this should not happen -- please debug");
819 stop_network_game = TRUE;
824 // copy valid player actions (will be set to 0 for not connected players)
825 for (i = 0; i < MAX_PLAYERS; i++)
826 stored_player[i].effective_action =
827 getNetworkBuffer8BitInteger(read_buffer);
829 network_player_action_received = TRUE;
832 static void Handle_OP_BROADCAST_MESSAGE(void)
834 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
836 Debug("network:client", "OP_BROADCAST_MESSAGE: %d", player_nr);
837 Debug("network:client", "client %d sends message", player_nr);
840 static void Handle_OP_LEVEL_FILE(void)
842 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
843 char *leveldir_identifier;
844 char *network_level_dir;
845 struct LevelFileInfo *file_info = &network_level.file_info;
846 struct LevelFileInfo *tmpl_info = &network_level.tmpl_info;
847 boolean use_custom_template;
849 setString(&network_level.leveldir_identifier, NULL);
850 setString(&network_level.file_info.basename, NULL);
851 setString(&network_level.file_info.filename, NULL);
852 setString(&network_level.tmpl_info.basename, NULL);
853 setString(&network_level.tmpl_info.filename, NULL);
855 Debug("network:client", "OP_LEVEL_FILE: %d", player_nr);
857 leveldir_identifier = getStringCopy(getNetworkBufferString(read_buffer));
859 if (hasPathSeparator(leveldir_identifier))
860 Error(ERR_EXIT, "protocol error: invalid filename from network client");
862 InitNetworkLevelDirectory(leveldir_identifier);
864 network_level_dir = getNetworkLevelDir(leveldir_identifier);
866 file_info->nr = getNetworkBuffer16BitInteger(read_buffer);
867 file_info->type = getNetworkBuffer8BitInteger(read_buffer);
868 file_info->packed = getNetworkBuffer8BitInteger(read_buffer);
869 file_info->basename = getStringCopy(getNetworkBufferString(read_buffer));
870 file_info->filename = getPath2(network_level_dir, file_info->basename);
872 if (hasPathSeparator(file_info->basename))
873 Error(ERR_EXIT, "protocol error: invalid filename from network client");
875 int num_bytes = getNetworkBufferFile(read_buffer, file_info->filename);
877 // if received level file is empty, remove it (as being non-existent)
879 remove(file_info->filename);
881 use_custom_template = getNetworkBuffer8BitInteger(read_buffer);
882 if (use_custom_template)
884 *tmpl_info = *file_info;
886 tmpl_info->basename = getStringCopy(getNetworkBufferString(read_buffer));
887 tmpl_info->filename = getPath2(network_level_dir, tmpl_info->basename);
889 if (hasPathSeparator(tmpl_info->basename))
890 Error(ERR_EXIT, "protocol error: invalid filename from network client");
892 getNetworkBufferFile(read_buffer, tmpl_info->filename);
894 // if received level file is empty, use level template file instead
896 setString(&file_info->filename, tmpl_info->filename);
899 network_level.leveldir_identifier = leveldir_identifier;
900 network_level.use_custom_template = use_custom_template;
902 // the receiving client(s) use(s) the transferred network level files
903 network_level.use_network_level_files = TRUE;
906 Debug("network:client", "'%s'", leveldir_identifier);
907 Debug("network:client", "'%d'", file_info->nr);
908 Debug("network:client", "'%d'", file_info->type);
909 Debug("network:client", "'%d'", file_info->packed);
910 Debug("network:client", "'%s'", file_info->basename);
911 Debug("network:client", "'%s'", file_info->filename);
913 if (use_custom_template)
914 Debug("network:client", "'%s'", tmpl_info->filename);
918 static void HandleNetworkingMessage(void)
920 stop_network_game = FALSE;
922 initNetworkBufferForReading(read_buffer);
924 int message_type = getNetworkBuffer8BitInteger(read_buffer);
926 switch (message_type)
928 case OP_BAD_PROTOCOL_VERSION:
929 Handle_OP_BAD_PROTOCOL_VERSION();
933 Handle_OP_YOUR_NUMBER();
936 case OP_NUMBER_WANTED:
937 Handle_OP_NUMBER_WANTED();
941 Handle_OP_PLAYER_NAME();
944 case OP_PLAYER_CONNECTED:
945 Handle_OP_PLAYER_CONNECTED();
948 case OP_PLAYER_DISCONNECTED:
949 Handle_OP_PLAYER_DISCONNECTED();
952 case OP_START_PLAYING:
953 Handle_OP_START_PLAYING();
956 case OP_PAUSE_PLAYING:
957 Handle_OP_PAUSE_PLAYING();
960 case OP_CONTINUE_PLAYING:
961 Handle_OP_CONTINUE_PLAYING();
964 case OP_STOP_PLAYING:
965 Handle_OP_STOP_PLAYING();
969 Handle_OP_MOVE_PLAYER();
972 case OP_BROADCAST_MESSAGE:
973 Handle_OP_BROADCAST_MESSAGE();
977 Handle_OP_LEVEL_FILE();
981 Debug("network:client", "unknown opcode %d from server", message_type);
986 // in case of internal error, stop network game
987 if (stop_network_game)
988 SendToServer_StopPlaying(NETWORK_STOP_BY_ERROR);
991 static char *HandleNetworkingPackets(void)
995 // ---------- check network server for activity ----------
997 int num_active_sockets = SDLNet_CheckSockets(rfds, 0);
999 if (num_active_sockets < 0)
1000 return "Error checking network sockets!";
1002 if (num_active_sockets == 0)
1003 break; // no active sockets, stop here
1005 // ---------- read packets from network server ----------
1007 initNetworkBufferForReceiving(read_buffer);
1009 int num_bytes = receiveNetworkBufferPacket(read_buffer, sfd);
1012 return "Error reading from network server!";
1015 return "Connection to network server lost!";
1017 HandleNetworkingMessage();
1019 if (stop_network_client)
1020 return stop_network_client_message;
1026 static void FreeNetworkClientPlayerInfo(struct NetworkClientPlayerInfo *player)
1032 FreeNetworkClientPlayerInfo(player->next);
1034 checked_free(player);
1037 static void HandleNetworkingDisconnect(void)
1041 SDLNet_TCP_DelSocket(rfds, sfd);
1042 SDLNet_TCP_Close(sfd);
1044 network_playing = FALSE;
1046 network.enabled = FALSE;
1047 network.connected = FALSE;
1049 setup.network_mode = FALSE;
1051 for (i = 0; i < MAX_PLAYERS; i++)
1052 stored_player[i].connected_network = FALSE;
1054 FreeNetworkClientPlayerInfo(first_player.next);
1056 first_player.nr = 0;
1057 first_player.next = NULL;
1060 void HandleNetworking(void)
1062 // do not handle any networking packets if request dialog is active
1063 if (game.request_active)
1066 char *error_message = HandleNetworkingPackets();
1068 if (error_message != NULL)
1070 HandleNetworkingDisconnect();
1072 if (game_status == GAME_MODE_PLAYING)
1074 Request(error_message, REQ_CONFIRM | REQ_STAY_CLOSED);
1076 SetGameStatus(GAME_MODE_MAIN);
1082 Request(error_message, REQ_CONFIRM);
1084 if (game_status == GAME_MODE_MAIN)
1085 ClearNetworkPlayers();
1090 void DisconnectFromNetworkServer(void)
1092 DrawNetworkText_Title("Terminating Network");
1093 DrawNetworkText("Disconnecting from network server ...");
1095 HandleNetworkingDisconnect();
1097 DrawNetworkText_Success("Successfully disconnected!");