1 // ============================================================================
2 // Rocks'n'Diamonds - McDuffin Strikes Back!
3 // ----------------------------------------------------------------------------
4 // (c) 1995-2014 by Artsoft Entertainment
7 // http://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 Error(ERR_DEBUG, "========== %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 Error(ERR_DEBUG, "%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)
191 #if defined(TARGET_SDL2)
192 server_thread = SDL_CreateThread(NetworkServerThread,
193 "NetworkServerThread", &p);
195 server_thread = SDL_CreateThread(NetworkServerThread, &p);
197 network_server = TRUE;
200 boolean ConnectToServer(char *hostname, int port)
206 if (read_buffer == NULL)
207 read_buffer = newNetworkBuffer();
209 if (write_buffer == NULL)
210 write_buffer = newNetworkBuffer();
212 DrawNetworkText_Title("Initializing Network");
215 port = DEFAULT_SERVER_PORT;
217 if (hostname == NULL)
219 // if no hostname given, try to auto-detect network server in local network
220 // by doing a UDP broadcast on the network server port and wait for answer
222 SDLNet_SocketSet udp_socket_set = SDLNet_AllocSocketSet(1);
224 Error(ERR_EXIT, "SDLNet_AllocSocketSet() failed: %s"), SDLNet_GetError();
226 udp = SDLNet_UDP_Open(0);
228 Error(ERR_EXIT, "SDLNet_UDP_Open() failed: %s", SDLNet_GetError());
230 if (SDLNet_UDP_AddSocket(udp_socket_set, udp) == -1)
231 Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_TCP_AddSocket() failed: %s"),
234 char *data_ptr = "network server UDB broadcast";
235 int data_len = strlen(data_ptr) + 1;
236 IPaddress ip_address;
238 SDLNet_Write32(0xffffffff, &ip_address.host); // 255.255.255.255
239 SDLNet_Write16(port, &ip_address.port);
251 SDLNet_UDP_Send(udp, -1, &packet);
253 DrawNetworkText("Looking for nearby network server ...");
255 // wait for any nearby network server to answer UDP broadcast
256 for (i = 0; i < 5; i++)
258 if (SDLNet_CheckSockets(udp_socket_set, 0) == 1)
260 int num_packets = SDLNet_UDP_Recv(udp, &packet);
262 if (num_packets == 1)
266 server_host = SDLNet_Read32(&packet.address.host);
268 sprintf(message, "Network server found at %d.%d.%d.%d!",
269 (server_host >> 24) & 0xff,
270 (server_host >> 16) & 0xff,
271 (server_host >> 8) & 0xff,
272 (server_host >> 0) & 0xff);
274 DrawNetworkText_Success(message);
278 DrawNetworkText_Failed("No answer from network server!");
285 Delay_WithScreenUpdates(100);
289 if (server_host == 0)
290 DrawNetworkText_Failed("No nearby network server found!");
293 rfds = SDLNet_AllocSocketSet(1);
299 SDLNet_ResolveHost(&ip, hostname, port);
301 if (ip.host == INADDR_NONE)
303 sprintf(message, "Failed to resolve network server hostname '%s'!",
306 DrawNetworkText_Failed(message);
312 server_host = SDLNet_Read32(&ip.host);
315 sprintf(message, "Connecting to network server host %s ...", hostname);
317 DrawNetworkText(message);
321 // if no hostname was given and no network server was auto-detected in the
322 // local network, try to connect to a network server at the local host
323 if (server_host == 0)
325 server_host = 0x7f000001; // 127.0.0.1
327 DrawNetworkText("Looking for local network server ...");
331 DrawNetworkText("Connecting to network server ...");
334 SDLNet_Write32(server_host, &ip.host);
335 SDLNet_Write16(port, &ip.port);
338 Error(ERR_DEBUG, "trying to connect to network server at %d.%d.%d.%d ...",
339 (server_host >> 24) & 0xff,
340 (server_host >> 16) & 0xff,
341 (server_host >> 8) & 0xff,
342 (server_host >> 0) & 0xff);
344 sfd = SDLNet_TCP_Open(&ip);
348 SDLNet_TCP_AddSocket(rfds, sfd);
350 DrawNetworkText_Success("Successfully connected!");
357 DrawNetworkText_Failed("Failed to connect to network server!");
359 DrawNetworkText_Failed("No local network server found!");
361 printf("SDLNet_TCP_Open(): %s\n", SDLNet_GetError());
364 if (hostname) // connect to specified server failed
367 DrawNetworkText("Starting new local network server ...");
369 StartNetworkServer(port);
371 // wait for server to start up and try connecting several times
372 for (i = 0; i < 30; i++)
374 if ((sfd = SDLNet_TCP_Open(&ip))) // connected
376 DrawNetworkText_Success("Successfully connected to newly started network server!");
378 SDLNet_TCP_AddSocket(rfds, sfd);
383 Delay_WithScreenUpdates(100);
386 DrawNetworkText_Failed("Failed to connect to newly started network server!");
388 // when reaching this point, connect to newly started server has failed
392 void SendToServer_PlayerName(char *player_name)
394 initNetworkBufferForWriting(write_buffer, OP_PLAYER_NAME, 0);
396 putNetworkBufferString(write_buffer, player_name);
398 SendNetworkBufferToServer(write_buffer);
400 Error(ERR_NETWORK_CLIENT, "you set your player name to \"%s\"", player_name);
403 void SendToServer_ProtocolVersion(void)
405 initNetworkBufferForWriting(write_buffer, OP_PROTOCOL_VERSION, 0);
407 putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_MAJOR);
408 putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_MINOR);
409 putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_PATCH);
411 SendNetworkBufferToServer(write_buffer);
414 void SendToServer_NrWanted(int nr_wanted)
416 initNetworkBufferForWriting(write_buffer, OP_NUMBER_WANTED, 0);
418 putNetworkBuffer8BitInteger(write_buffer, nr_wanted);
420 SendNetworkBufferToServer(write_buffer);
423 void SendToServer_LevelFile(void)
425 initNetworkBufferForWriting(write_buffer, OP_LEVEL_FILE, 0);
427 putNetworkBufferString( write_buffer, leveldir_current->identifier);
428 putNetworkBuffer16BitInteger(write_buffer, level.file_info.nr);
429 putNetworkBuffer8BitInteger( write_buffer, level.file_info.type);
430 putNetworkBuffer8BitInteger( write_buffer, level.file_info.packed);
431 putNetworkBufferString( write_buffer, level.file_info.basename);
432 putNetworkBufferFile( write_buffer, level.file_info.filename);
433 putNetworkBuffer8BitInteger( write_buffer, level.use_custom_template);
435 if (level.use_custom_template)
437 putNetworkBufferString(write_buffer, level_template.file_info.basename);
438 putNetworkBufferFile( write_buffer, level_template.file_info.filename);
441 SendNetworkBufferToServer(write_buffer);
443 setString(&network_level.leveldir_identifier, leveldir_current->identifier);
445 // the sending client does not use network level files (but the real ones)
446 network_level.use_network_level_files = FALSE;
449 printf("::: '%s'\n", leveldir_current->identifier);
450 printf("::: '%d'\n", level.file_info.nr);
451 printf("::: '%d'\n", level.file_info.type);
452 printf("::: '%d'\n", level.file_info.packed);
453 printf("::: '%s'\n", level.file_info.basename);
454 printf("::: '%s'\n", level.file_info.filename);
456 if (level.use_custom_template)
457 printf("::: '%s'\n", level_template.file_info.filename);
461 void SendToServer_StartPlaying(void)
463 unsigned int new_random_seed = InitRND(level.random_seed);
465 initNetworkBufferForWriting(write_buffer, OP_START_PLAYING, 0);
467 putNetworkBufferString( write_buffer, leveldir_current->identifier);
468 putNetworkBuffer16BitInteger(write_buffer, level_nr);
469 putNetworkBuffer32BitInteger(write_buffer, new_random_seed);
471 SendNetworkBufferToServer(write_buffer);
474 void SendToServer_PausePlaying(void)
476 initNetworkBufferForWriting(write_buffer, OP_PAUSE_PLAYING, 0);
478 SendNetworkBufferToServer(write_buffer);
481 void SendToServer_ContinuePlaying(void)
483 initNetworkBufferForWriting(write_buffer, OP_CONTINUE_PLAYING, 0);
485 SendNetworkBufferToServer(write_buffer);
488 void SendToServer_StopPlaying(int cause_for_stopping)
490 initNetworkBufferForWriting(write_buffer, OP_STOP_PLAYING, 0);
492 putNetworkBuffer8BitInteger(write_buffer, cause_for_stopping);
494 SendNetworkBufferToServer(write_buffer);
497 void SendToServer_MovePlayer(byte player_action)
499 initNetworkBufferForWriting(write_buffer, OP_MOVE_PLAYER, 0);
501 putNetworkBuffer8BitInteger(write_buffer, player_action);
503 SendNetworkBufferToServer(write_buffer);
506 static void Handle_OP_BAD_PROTOCOL_VERSION(void)
508 int protocol_version_major = getNetworkBuffer8BitInteger(read_buffer);
509 int protocol_version_minor = getNetworkBuffer8BitInteger(read_buffer);
511 Error(ERR_WARN, "protocol version mismatch");
512 Error(ERR_WARN, "server expects %d.%d.x instead of %d.%d.%d",
513 protocol_version_major,
514 protocol_version_minor,
515 PROTOCOL_VERSION_MAJOR,
516 PROTOCOL_VERSION_MINOR,
517 PROTOCOL_VERSION_PATCH);
519 sprintf(stop_network_client_message, "Network protocol version mismatch! Server expects version %d.%d.x instead of %d.%d.%d!",
520 protocol_version_major,
521 protocol_version_minor,
522 PROTOCOL_VERSION_MAJOR,
523 PROTOCOL_VERSION_MINOR,
524 PROTOCOL_VERSION_PATCH);
526 stop_network_client = TRUE;
529 static void Handle_OP_YOUR_NUMBER(void)
531 int old_client_nr = getNetworkBuffer8BitInteger(read_buffer);
532 int new_client_nr = getNetworkBuffer8BitInteger(read_buffer);
533 int new_index_nr = new_client_nr - 1;
534 struct PlayerInfo *old_local_player = local_player;
535 struct PlayerInfo *new_local_player = &stored_player[new_index_nr];
537 printf("OP_YOUR_NUMBER: %d\n", old_client_nr);
538 first_player.nr = new_client_nr;
540 if (old_local_player != new_local_player)
542 // set relevant player settings and change to new player
544 local_player = new_local_player;
546 old_local_player->connected_locally = FALSE;
547 new_local_player->connected_locally = TRUE;
549 old_local_player->connected_network = FALSE;
550 new_local_player->connected_network = TRUE;
553 if (first_player.nr > MAX_PLAYERS)
554 Error(ERR_EXIT, "sorry, more than %d players not allowed", MAX_PLAYERS);
556 Error(ERR_NETWORK_CLIENT, "you get client # %d", new_client_nr);
558 stored_player[new_index_nr].connected_network = TRUE;
561 static void Handle_OP_NUMBER_WANTED(void)
563 int old_client_nr = getNetworkBuffer8BitInteger(read_buffer);
564 int client_nr_wanted = getNetworkBuffer8BitInteger(read_buffer);
565 int new_client_nr = getNetworkBuffer8BitInteger(read_buffer);
566 int old_index_nr = old_client_nr - 1;
567 int new_index_nr = new_client_nr - 1;
568 int index_nr_wanted = client_nr_wanted - 1;
569 struct PlayerInfo *old_player = &stored_player[old_index_nr];
570 struct PlayerInfo *new_player = &stored_player[new_index_nr];
572 printf("OP_NUMBER_WANTED: %d\n", old_client_nr);
574 if (new_client_nr == client_nr_wanted) // switching succeeded
576 struct NetworkClientPlayerInfo *player;
578 if (old_client_nr != client_nr_wanted) // client's nr has changed
579 Error(ERR_NETWORK_CLIENT, "client %d switches to # %d",
580 old_client_nr, new_client_nr);
581 else if (old_client_nr == first_player.nr) // local player keeps his nr
582 Error(ERR_NETWORK_CLIENT, "keeping client # %d", new_client_nr);
584 if (old_client_nr != new_client_nr)
586 // set relevant player settings and change to new player
588 old_player->connected_network = FALSE;
589 new_player->connected_network = TRUE;
592 player = getNetworkPlayer(old_client_nr);
593 player->nr = new_client_nr;
595 if (old_player == local_player) // local player switched
597 local_player = new_player;
599 old_player->connected_locally = FALSE;
600 new_player->connected_locally = TRUE;
603 else if (old_client_nr == first_player.nr) // failed -- local player?
607 sprintf(request, "Sorry! Player %d already exists! You are player %d!",
608 index_nr_wanted + 1, new_index_nr + 1);
610 Request(request, REQ_CONFIRM);
612 Error(ERR_NETWORK_CLIENT, "cannot switch -- you keep client # %d",
616 if (game_status == GAME_MODE_MAIN)
617 DrawNetworkPlayers();
620 static void Handle_OP_PLAYER_NAME(void)
622 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
623 char *player_name = getNetworkBufferString(read_buffer);
624 struct NetworkClientPlayerInfo *player = getNetworkPlayer(player_nr);
626 printf("OP_PLAYER_NAME: %d\n", player_nr);
628 strncpy(player->name, player_name, MAX_PLAYER_NAME_LEN);
629 player->name[MAX_PLAYER_NAME_LEN] = '\0';
631 Error(ERR_NETWORK_CLIENT, "client %d calls itself \"%s\"",
632 player_nr, player->name);
635 static void Handle_OP_PLAYER_CONNECTED(void)
637 struct NetworkClientPlayerInfo *player, *last_player = NULL;
638 int new_client_nr = getNetworkBuffer8BitInteger(read_buffer);
639 int new_index_nr = new_client_nr - 1;
641 printf("OP_PLAYER_CONNECTED: %d\n", new_client_nr);
642 Error(ERR_NETWORK_CLIENT, "new client %d connected", new_client_nr);
644 for (player = &first_player; player; player = player->next)
646 if (player->nr == new_client_nr)
647 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
649 last_player = player;
652 last_player->next = player =
653 checked_malloc(sizeof(struct NetworkClientPlayerInfo));
654 player->nr = new_client_nr;
655 player->name[0] = '\0';
658 stored_player[new_index_nr].connected_network = TRUE;
661 static void Handle_OP_PLAYER_DISCONNECTED(void)
663 struct NetworkClientPlayerInfo *player, *player_disconnected;
664 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
665 int index_nr = player_nr - 1;
667 printf("OP_PLAYER_DISCONNECTED: %d\n", player_nr);
668 player_disconnected = getNetworkPlayer(player_nr);
669 Error(ERR_NETWORK_CLIENT, "client %d (%s) disconnected",
670 player_nr, getNetworkPlayerName(player_nr));
672 for (player = &first_player; player; player = player->next)
673 if (player->next == player_disconnected)
674 player->next = player_disconnected->next;
675 free(player_disconnected);
677 stored_player[index_nr].connected_locally = FALSE;
678 stored_player[index_nr].connected_network = FALSE;
680 if (game_status == GAME_MODE_PLAYING)
684 sprintf(message, "Player %d left network server! Network game stopped!",
687 Request(message, REQ_CONFIRM | REQ_STAY_CLOSED);
689 SetGameStatus(GAME_MODE_MAIN);
693 else if (game_status == GAME_MODE_MAIN)
695 DrawNetworkPlayers();
699 static void Handle_OP_START_PLAYING(void)
701 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
702 char *new_leveldir_identifier = getNetworkBufferString(read_buffer);
703 int new_level_nr = getNetworkBuffer16BitInteger(read_buffer);
704 unsigned int new_random_seed = getNetworkBuffer32BitInteger(read_buffer);
706 if (!strEqual(new_leveldir_identifier, network_level.leveldir_identifier))
708 Error(ERR_WARN, "no such level identifier: '%s'", new_leveldir_identifier);
710 stop_network_game = TRUE;
715 printf("OP_START_PLAYING: %d\n", player_nr);
716 Error(ERR_NETWORK_CLIENT,
717 "client %d starts game [level %d from level identifier '%s']\n",
718 player_nr, new_level_nr, new_leveldir_identifier);
720 LevelDirTree *new_leveldir =
721 getTreeInfoFromIdentifier(leveldir_first, new_leveldir_identifier);
723 if (new_leveldir != NULL)
725 leveldir_current = new_leveldir;
726 level_nr = new_level_nr;
729 // needed if level set of network game changed graphics, sounds or music
730 ReloadCustomArtwork(0);
734 if (network_level.use_network_level_files)
735 LoadNetworkLevel(&network_level);
739 StartGameActions(FALSE, setup.autorecord, new_random_seed);
742 static void Handle_OP_PAUSE_PLAYING(void)
744 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
746 printf("OP_PAUSE_PLAYING: %d\n", player_nr);
747 Error(ERR_NETWORK_CLIENT, "client %d pauses game", player_nr);
749 if (game_status == GAME_MODE_PLAYING)
752 DrawVideoDisplay(VIDEO_STATE_PAUSE_ON, 0);
756 static void Handle_OP_CONTINUE_PLAYING(void)
758 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
760 printf("OP_CONTINUE_PLAYING: %d\n", player_nr);
761 Error(ERR_NETWORK_CLIENT, "client %d continues game", player_nr);
763 if (game_status == GAME_MODE_PLAYING)
765 tape.pausing = FALSE;
766 DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF, 0);
770 static void Handle_OP_STOP_PLAYING(void)
772 int client_nr = getNetworkBuffer8BitInteger(read_buffer);
773 int cause_for_stopping = getNetworkBuffer8BitInteger(read_buffer);
775 printf("OP_STOP_PLAYING: %d [%d]\n", client_nr, cause_for_stopping);
776 Error(ERR_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 Error(ERR_INFO, "frame counters of client %d and server out of sync",
816 Error(ERR_INFO, "frame counter of client is %d", FrameCounter);
817 Error(ERR_INFO, "frame counter of server is %d", server_frame_counter);
818 Error(ERR_INFO, "this should not happen -- please debug");
820 stop_network_game = TRUE;
825 // copy valid player actions (will be set to 0 for not connected players)
826 for (i = 0; i < MAX_PLAYERS; i++)
827 stored_player[i].effective_action =
828 getNetworkBuffer8BitInteger(read_buffer);
830 network_player_action_received = TRUE;
833 static void Handle_OP_BROADCAST_MESSAGE(void)
835 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
837 printf("OP_BROADCAST_MESSAGE: %d\n", player_nr);
838 Error(ERR_NETWORK_CLIENT, "client %d sends message", player_nr);
841 static void Handle_OP_LEVEL_FILE(void)
843 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
844 char *leveldir_identifier;
845 char *network_level_dir;
846 struct LevelFileInfo *file_info = &network_level.file_info;
847 struct LevelFileInfo *tmpl_info = &network_level.tmpl_info;
848 boolean use_custom_template;
850 setString(&network_level.leveldir_identifier, NULL);
851 setString(&network_level.file_info.basename, NULL);
852 setString(&network_level.file_info.filename, NULL);
853 setString(&network_level.tmpl_info.basename, NULL);
854 setString(&network_level.tmpl_info.filename, NULL);
856 printf("OP_LEVEL_FILE: %d\n", player_nr);
858 leveldir_identifier = getStringCopy(getNetworkBufferString(read_buffer));
860 if (hasPathSeparator(leveldir_identifier))
861 Error(ERR_EXIT, "protocol error: invalid filename from network client");
863 InitNetworkLevelDirectory(leveldir_identifier);
865 network_level_dir = getNetworkLevelDir(leveldir_identifier);
867 file_info->nr = getNetworkBuffer16BitInteger(read_buffer);
868 file_info->type = getNetworkBuffer8BitInteger(read_buffer);
869 file_info->packed = getNetworkBuffer8BitInteger(read_buffer);
870 file_info->basename = getStringCopy(getNetworkBufferString(read_buffer));
871 file_info->filename = getPath2(network_level_dir, file_info->basename);
873 if (hasPathSeparator(file_info->basename))
874 Error(ERR_EXIT, "protocol error: invalid filename from network client");
876 getNetworkBufferFile(read_buffer, file_info->filename);
878 use_custom_template = getNetworkBuffer8BitInteger(read_buffer);
879 if (use_custom_template)
881 *tmpl_info = *file_info;
883 tmpl_info->basename = getStringCopy(getNetworkBufferString(read_buffer));
884 tmpl_info->filename = getPath2(network_level_dir, tmpl_info->basename);
886 if (hasPathSeparator(tmpl_info->basename))
887 Error(ERR_EXIT, "protocol error: invalid filename from network client");
889 getNetworkBufferFile(read_buffer, tmpl_info->filename);
892 network_level.leveldir_identifier = leveldir_identifier;
893 network_level.use_custom_template = use_custom_template;
895 // the receiving client(s) use(s) the transferred network level files
896 network_level.use_network_level_files = TRUE;
899 printf("::: '%s'\n", leveldir_identifier);
900 printf("::: '%d'\n", file_info->nr);
901 printf("::: '%d'\n", file_info->type);
902 printf("::: '%d'\n", file_info->packed);
903 printf("::: '%s'\n", file_info->basename);
904 printf("::: '%s'\n", file_info->filename);
906 if (use_custom_template)
907 printf("::: '%s'\n", tmpl_info->filename);
911 static void HandleNetworkingMessage(void)
913 stop_network_game = FALSE;
915 initNetworkBufferForReading(read_buffer);
917 int message_type = getNetworkBuffer8BitInteger(read_buffer);
919 switch (message_type)
921 case OP_BAD_PROTOCOL_VERSION:
922 Handle_OP_BAD_PROTOCOL_VERSION();
926 Handle_OP_YOUR_NUMBER();
929 case OP_NUMBER_WANTED:
930 Handle_OP_NUMBER_WANTED();
934 Handle_OP_PLAYER_NAME();
937 case OP_PLAYER_CONNECTED:
938 Handle_OP_PLAYER_CONNECTED();
941 case OP_PLAYER_DISCONNECTED:
942 Handle_OP_PLAYER_DISCONNECTED();
945 case OP_START_PLAYING:
946 Handle_OP_START_PLAYING();
949 case OP_PAUSE_PLAYING:
950 Handle_OP_PAUSE_PLAYING();
953 case OP_CONTINUE_PLAYING:
954 Handle_OP_CONTINUE_PLAYING();
957 case OP_STOP_PLAYING:
958 Handle_OP_STOP_PLAYING();
962 Handle_OP_MOVE_PLAYER();
965 case OP_BROADCAST_MESSAGE:
966 Handle_OP_BROADCAST_MESSAGE();
970 Handle_OP_LEVEL_FILE();
975 Error(ERR_NETWORK_CLIENT,
976 "unknown opcode %d from server", message_type);
981 // in case of internal error, stop network game
982 if (stop_network_game)
983 SendToServer_StopPlaying(NETWORK_STOP_BY_ERROR);
986 static char *HandleNetworkingPackets(void)
990 // ---------- check network server for activity ----------
992 int num_active_sockets = SDLNet_CheckSockets(rfds, 0);
994 if (num_active_sockets < 0)
995 return "Error checking network sockets!";
997 if (num_active_sockets == 0)
998 break; // no active sockets, stop here
1000 // ---------- read packets from network server ----------
1002 initNetworkBufferForReceiving(read_buffer);
1004 int num_bytes = receiveNetworkBufferPacket(read_buffer, sfd);
1007 return "Error reading from network server!";
1010 return "Connection to network server lost!";
1012 HandleNetworkingMessage();
1014 if (stop_network_client)
1015 return stop_network_client_message;
1021 static void FreeNetworkClientPlayerInfo(struct NetworkClientPlayerInfo *player)
1027 FreeNetworkClientPlayerInfo(player->next);
1029 checked_free(player);
1032 static void HandleNetworkingDisconnect(void)
1036 SDLNet_TCP_DelSocket(rfds, sfd);
1037 SDLNet_TCP_Close(sfd);
1039 network_playing = FALSE;
1041 network.enabled = FALSE;
1042 network.connected = FALSE;
1044 setup.network_mode = FALSE;
1046 for (i = 0; i < MAX_PLAYERS; i++)
1047 stored_player[i].connected_network = FALSE;
1049 FreeNetworkClientPlayerInfo(first_player.next);
1051 first_player.nr = 0;
1052 first_player.next = NULL;
1055 void HandleNetworking(void)
1057 // do not handle any networking packets if request dialog is active
1058 if (game.request_active)
1061 char *error_message = HandleNetworkingPackets();
1063 if (error_message != NULL)
1065 HandleNetworkingDisconnect();
1067 if (game_status == GAME_MODE_PLAYING)
1069 Request(error_message, REQ_CONFIRM | REQ_STAY_CLOSED);
1071 SetGameStatus(GAME_MODE_MAIN);
1077 Request(error_message, REQ_CONFIRM);
1079 if (game_status == GAME_MODE_MAIN)
1080 ClearNetworkPlayers();
1085 void DisconnectFromNetworkServer(void)
1087 DrawNetworkText_Title("Terminating Network");
1088 DrawNetworkText("Disconnecting from network server ...");
1090 HandleNetworkingDisconnect();
1092 DrawNetworkText_Success("Successfully disconnected!");