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 static boolean hasPathSeparator(char *s)
178 return (strchr(s, '/') != NULL);
181 static void StartNetworkServer(int port)
186 #if defined(TARGET_SDL2)
187 server_thread = SDL_CreateThread(NetworkServerThread,
188 "NetworkServerThread", &p);
190 server_thread = SDL_CreateThread(NetworkServerThread, &p);
192 network_server = TRUE;
195 boolean ConnectToServer(char *hostname, int port)
201 if (read_buffer == NULL)
202 read_buffer = newNetworkBuffer();
204 if (write_buffer == NULL)
205 write_buffer = newNetworkBuffer();
207 DrawNetworkText_Title("Initializing Network");
210 port = DEFAULT_SERVER_PORT;
212 if (hostname == NULL)
214 // if no hostname given, try to auto-detect network server in local network
215 // by doing a UDP broadcast on the network server port and wait for answer
217 SDLNet_SocketSet udp_socket_set = SDLNet_AllocSocketSet(1);
219 Error(ERR_EXIT, "SDLNet_AllocSocketSet() failed: %s"), SDLNet_GetError();
221 udp = SDLNet_UDP_Open(0);
223 Error(ERR_EXIT, "SDLNet_UDP_Open() failed: %s", SDLNet_GetError());
225 if (SDLNet_UDP_AddSocket(udp_socket_set, udp) == -1)
226 Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_TCP_AddSocket() failed: %s"),
229 char *data_ptr = "network server UDB broadcast";
230 int data_len = strlen(data_ptr) + 1;
231 IPaddress ip_address;
233 SDLNet_Write32(0xffffffff, &ip_address.host); /* 255.255.255.255 */
234 SDLNet_Write16(port, &ip_address.port);
246 SDLNet_UDP_Send(udp, -1, &packet);
248 DrawNetworkText("Looking for local network server ...");
250 /* wait for any local network server to answer UDP broadcast */
251 for (i = 0; i < 5; i++)
253 if (SDLNet_CheckSockets(udp_socket_set, 0) == 1)
255 int num_packets = SDLNet_UDP_Recv(udp, &packet);
257 if (num_packets == 1)
259 DrawNetworkText_Success("Network server found!");
261 server_host = SDLNet_Read32(&packet.address.host);
265 DrawNetworkText_Failed("No answer from network server!");
272 Delay_WithScreenUpdates(100);
276 if (server_host == 0)
277 DrawNetworkText_Failed("No network server found!");
280 rfds = SDLNet_AllocSocketSet(1);
284 SDLNet_ResolveHost(&ip, hostname, port);
286 if (ip.host == INADDR_NONE)
290 sprintf(message, "Failed to resolve network server hostname '%s'!",
293 DrawNetworkText_Failed(message);
298 server_host = SDLNet_Read32(&ip.host);
300 DrawNetworkText("Connecting to remote host ...");
304 // if no hostname was given and no network server was auto-detected in the
305 // local network, try to connect to a network server at the local host
306 if (server_host == 0)
307 server_host = 0x7f000001; /* 127.0.0.1 */
309 SDLNet_Write32(server_host, &ip.host);
310 SDLNet_Write16(port, &ip.port);
312 DrawNetworkText("Connecting to local host ...");
315 Error(ERR_DEBUG, "trying to connect to network server at %d.%d.%d.%d ...",
316 (server_host >> 24) & 0xff,
317 (server_host >> 16) & 0xff,
318 (server_host >> 8) & 0xff,
319 (server_host >> 0) & 0xff);
321 sfd = SDLNet_TCP_Open(&ip);
325 SDLNet_TCP_AddSocket(rfds, sfd);
327 DrawNetworkText_Success("Successfully connected!");
333 DrawNetworkText_Failed("Failed to connect to network server!");
335 printf("SDLNet_TCP_Open(): %s\n", SDLNet_GetError());
338 if (hostname) /* connect to specified server failed */
341 DrawNetworkText("Starting new local network server ...");
343 StartNetworkServer(port);
345 /* wait for server to start up and try connecting several times */
346 for (i = 0; i < 30; i++)
348 if ((sfd = SDLNet_TCP_Open(&ip))) /* connected */
350 DrawNetworkText_Success("Successfully connected!");
352 SDLNet_TCP_AddSocket(rfds, sfd);
356 Delay_WithScreenUpdates(100);
359 DrawNetworkText_Failed("Failed to connect to network server!");
361 /* when reaching this point, connect to newly started server has failed */
365 void SendToServer_PlayerName(char *player_name)
367 initNetworkBufferForWriting(write_buffer, OP_PLAYER_NAME, 0);
369 putNetworkBufferString(write_buffer, player_name);
371 SendNetworkBufferToServer(write_buffer);
373 Error(ERR_NETWORK_CLIENT, "you set your player name to \"%s\"", player_name);
376 void SendToServer_ProtocolVersion(void)
378 initNetworkBufferForWriting(write_buffer, OP_PROTOCOL_VERSION, 0);
380 putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_MAJOR);
381 putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_MINOR);
382 putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_PATCH);
384 SendNetworkBufferToServer(write_buffer);
387 void SendToServer_NrWanted(int nr_wanted)
389 initNetworkBufferForWriting(write_buffer, OP_NUMBER_WANTED, 0);
391 putNetworkBuffer8BitInteger(write_buffer, nr_wanted);
393 SendNetworkBufferToServer(write_buffer);
396 void SendToServer_LevelFile(void)
398 initNetworkBufferForWriting(write_buffer, OP_LEVEL_FILE, 0);
400 putNetworkBufferString( write_buffer, leveldir_current->identifier);
401 putNetworkBuffer16BitInteger(write_buffer, level.file_info.nr);
402 putNetworkBuffer8BitInteger( write_buffer, level.file_info.type);
403 putNetworkBuffer8BitInteger( write_buffer, level.file_info.packed);
404 putNetworkBufferString( write_buffer, level.file_info.basename);
405 putNetworkBufferFile( write_buffer, level.file_info.filename);
406 putNetworkBuffer8BitInteger( write_buffer, level.use_custom_template);
408 if (level.use_custom_template)
410 putNetworkBufferString(write_buffer, level_template.file_info.basename);
411 putNetworkBufferFile( write_buffer, level_template.file_info.filename);
414 SendNetworkBufferToServer(write_buffer);
416 setString(&network_level.leveldir_identifier, leveldir_current->identifier);
418 /* the sending client does not use network level files (but the real ones) */
419 network_level.use_network_level_files = FALSE;
422 printf("::: '%s'\n", leveldir_current->identifier);
423 printf("::: '%d'\n", level.file_info.nr);
424 printf("::: '%d'\n", level.file_info.type);
425 printf("::: '%d'\n", level.file_info.packed);
426 printf("::: '%s'\n", level.file_info.basename);
427 printf("::: '%s'\n", level.file_info.filename);
429 if (level.use_custom_template)
430 printf("::: '%s'\n", level_template.file_info.filename);
434 void SendToServer_StartPlaying(void)
436 unsigned int new_random_seed = InitRND(level.random_seed);
438 initNetworkBufferForWriting(write_buffer, OP_START_PLAYING, 0);
440 putNetworkBufferString( write_buffer, leveldir_current->identifier);
441 putNetworkBuffer16BitInteger(write_buffer, level_nr);
442 putNetworkBuffer32BitInteger(write_buffer, new_random_seed);
444 SendNetworkBufferToServer(write_buffer);
447 void SendToServer_PausePlaying(void)
449 initNetworkBufferForWriting(write_buffer, OP_PAUSE_PLAYING, 0);
451 SendNetworkBufferToServer(write_buffer);
454 void SendToServer_ContinuePlaying(void)
456 initNetworkBufferForWriting(write_buffer, OP_CONTINUE_PLAYING, 0);
458 SendNetworkBufferToServer(write_buffer);
461 void SendToServer_StopPlaying(int cause_for_stopping)
463 initNetworkBufferForWriting(write_buffer, OP_STOP_PLAYING, 0);
465 putNetworkBuffer8BitInteger(write_buffer, cause_for_stopping);
467 SendNetworkBufferToServer(write_buffer);
470 void SendToServer_MovePlayer(byte player_action)
472 initNetworkBufferForWriting(write_buffer, OP_MOVE_PLAYER, 0);
474 putNetworkBuffer8BitInteger(write_buffer, player_action);
476 SendNetworkBufferToServer(write_buffer);
479 static void Handle_OP_BAD_PROTOCOL_VERSION(void)
481 int protocol_version_major = getNetworkBuffer8BitInteger(read_buffer);
482 int protocol_version_minor = getNetworkBuffer8BitInteger(read_buffer);
484 Error(ERR_WARN, "protocol version mismatch");
485 Error(ERR_WARN, "server expects %d.%d.x instead of %d.%d.%d",
486 protocol_version_major,
487 protocol_version_minor,
488 PROTOCOL_VERSION_MAJOR,
489 PROTOCOL_VERSION_MINOR,
490 PROTOCOL_VERSION_PATCH);
492 sprintf(stop_network_client_message, "Network protocol version mismatch! Server expects version %d.%d.x instead of %d.%d.%d!",
493 protocol_version_major,
494 protocol_version_minor,
495 PROTOCOL_VERSION_MAJOR,
496 PROTOCOL_VERSION_MINOR,
497 PROTOCOL_VERSION_PATCH);
499 stop_network_client = TRUE;
502 static void Handle_OP_YOUR_NUMBER(void)
504 int old_client_nr = getNetworkBuffer8BitInteger(read_buffer);
505 int new_client_nr = getNetworkBuffer8BitInteger(read_buffer);
506 int new_index_nr = new_client_nr - 1;
507 struct PlayerInfo *old_local_player = local_player;
508 struct PlayerInfo *new_local_player = &stored_player[new_index_nr];
510 printf("OP_YOUR_NUMBER: %d\n", old_client_nr);
511 first_player.nr = new_client_nr;
513 if (old_local_player != new_local_player)
515 /* set relevant player settings and change to new player */
517 local_player = new_local_player;
519 old_local_player->connected_locally = FALSE;
520 new_local_player->connected_locally = TRUE;
522 old_local_player->connected_network = FALSE;
523 new_local_player->connected_network = TRUE;
526 if (first_player.nr > MAX_PLAYERS)
527 Error(ERR_EXIT, "sorry, more than %d players not allowed", MAX_PLAYERS);
529 Error(ERR_NETWORK_CLIENT, "you get client # %d", new_client_nr);
531 stored_player[new_index_nr].connected_network = TRUE;
534 static void Handle_OP_NUMBER_WANTED(void)
536 int old_client_nr = getNetworkBuffer8BitInteger(read_buffer);
537 int client_nr_wanted = getNetworkBuffer8BitInteger(read_buffer);
538 int new_client_nr = getNetworkBuffer8BitInteger(read_buffer);
539 int old_index_nr = old_client_nr - 1;
540 int new_index_nr = new_client_nr - 1;
541 int index_nr_wanted = client_nr_wanted - 1;
542 struct PlayerInfo *old_player = &stored_player[old_index_nr];
543 struct PlayerInfo *new_player = &stored_player[new_index_nr];
545 printf("OP_NUMBER_WANTED: %d\n", old_client_nr);
547 if (new_client_nr == client_nr_wanted) /* switching succeeded */
549 struct NetworkClientPlayerInfo *player;
551 if (old_client_nr != client_nr_wanted) /* client's nr has changed */
552 Error(ERR_NETWORK_CLIENT, "client %d switches to # %d",
553 old_client_nr, new_client_nr);
554 else if (old_client_nr == first_player.nr) /* local player keeps his nr */
555 Error(ERR_NETWORK_CLIENT, "keeping client # %d", new_client_nr);
557 if (old_client_nr != new_client_nr)
559 /* set relevant player settings and change to new player */
561 old_player->connected_network = FALSE;
562 new_player->connected_network = TRUE;
565 player = getNetworkPlayer(old_client_nr);
566 player->nr = new_client_nr;
568 if (old_player == local_player) /* local player switched */
570 local_player = new_player;
572 old_player->connected_locally = FALSE;
573 new_player->connected_locally = TRUE;
576 else if (old_client_nr == first_player.nr) /* failed -- local player? */
580 sprintf(request, "Sorry! Player %d already exists! You are player %d!",
581 index_nr_wanted + 1, new_index_nr + 1);
583 Request(request, REQ_CONFIRM);
585 Error(ERR_NETWORK_CLIENT, "cannot switch -- you keep client # %d",
589 if (game_status == GAME_MODE_MAIN)
590 DrawNetworkPlayers();
593 static void Handle_OP_PLAYER_NAME(void)
595 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
596 char *player_name = getNetworkBufferString(read_buffer);
597 struct NetworkClientPlayerInfo *player = getNetworkPlayer(player_nr);
599 printf("OP_PLAYER_NAME: %d\n", player_nr);
601 strncpy(player->name, player_name, MAX_PLAYER_NAME_LEN);
602 player->name[MAX_PLAYER_NAME_LEN] = '\0';
604 Error(ERR_NETWORK_CLIENT, "client %d calls itself \"%s\"",
605 player_nr, player->name);
608 static void Handle_OP_PLAYER_CONNECTED(void)
610 struct NetworkClientPlayerInfo *player, *last_player = NULL;
611 int new_client_nr = getNetworkBuffer8BitInteger(read_buffer);
612 int new_index_nr = new_client_nr - 1;
614 printf("OP_PLAYER_CONNECTED: %d\n", new_client_nr);
615 Error(ERR_NETWORK_CLIENT, "new client %d connected", new_client_nr);
617 for (player = &first_player; player; player = player->next)
619 if (player->nr == new_client_nr)
620 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
622 last_player = player;
625 last_player->next = player =
626 checked_malloc(sizeof(struct NetworkClientPlayerInfo));
627 player->nr = new_client_nr;
628 player->name[0] = '\0';
631 stored_player[new_index_nr].connected_network = TRUE;
634 static void Handle_OP_PLAYER_DISCONNECTED(void)
636 struct NetworkClientPlayerInfo *player, *player_disconnected;
637 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
638 int index_nr = player_nr - 1;
640 printf("OP_PLAYER_DISCONNECTED: %d\n", player_nr);
641 player_disconnected = getNetworkPlayer(player_nr);
642 Error(ERR_NETWORK_CLIENT, "client %d (%s) disconnected",
643 player_nr, getNetworkPlayerName(player_nr));
645 for (player = &first_player; player; player = player->next)
646 if (player->next == player_disconnected)
647 player->next = player_disconnected->next;
648 free(player_disconnected);
650 stored_player[index_nr].connected_locally = FALSE;
651 stored_player[index_nr].connected_network = FALSE;
653 if (game_status == GAME_MODE_PLAYING)
657 sprintf(message, "Player %d left network server! Network game stopped!",
660 Request(message, REQ_CONFIRM | REQ_STAY_CLOSED);
662 SetGameStatus(GAME_MODE_MAIN);
666 else if (game_status == GAME_MODE_MAIN)
668 DrawNetworkPlayers();
672 static void Handle_OP_START_PLAYING(void)
674 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
675 char *new_leveldir_identifier = getNetworkBufferString(read_buffer);
676 int new_level_nr = getNetworkBuffer16BitInteger(read_buffer);
677 unsigned int new_random_seed = getNetworkBuffer32BitInteger(read_buffer);
679 if (!strEqual(new_leveldir_identifier, network_level.leveldir_identifier))
681 Error(ERR_WARN, "no such level identifier: '%s'", new_leveldir_identifier);
683 stop_network_game = TRUE;
688 printf("OP_START_PLAYING: %d\n", player_nr);
689 Error(ERR_NETWORK_CLIENT,
690 "client %d starts game [level %d from level identifier '%s']\n",
691 player_nr, new_level_nr, new_leveldir_identifier);
693 LevelDirTree *new_leveldir =
694 getTreeInfoFromIdentifier(leveldir_first, new_leveldir_identifier);
696 if (new_leveldir != NULL)
698 leveldir_current = new_leveldir;
699 level_nr = new_level_nr;
702 /* needed if level set of network game changed graphics, sounds or music */
703 ReloadCustomArtwork(0);
707 if (network_level.use_network_level_files)
708 LoadNetworkLevel(&network_level);
712 StartGameActions(FALSE, setup.autorecord, new_random_seed);
715 static void Handle_OP_PAUSE_PLAYING(void)
717 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
719 printf("OP_PAUSE_PLAYING: %d\n", player_nr);
720 Error(ERR_NETWORK_CLIENT, "client %d pauses game", player_nr);
722 if (game_status == GAME_MODE_PLAYING)
725 DrawVideoDisplay(VIDEO_STATE_PAUSE_ON, 0);
729 static void Handle_OP_CONTINUE_PLAYING(void)
731 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
733 printf("OP_CONTINUE_PLAYING: %d\n", player_nr);
734 Error(ERR_NETWORK_CLIENT, "client %d continues game", player_nr);
736 if (game_status == GAME_MODE_PLAYING)
738 tape.pausing = FALSE;
739 DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF, 0);
743 static void Handle_OP_STOP_PLAYING(void)
745 int client_nr = getNetworkBuffer8BitInteger(read_buffer);
746 int cause_for_stopping = getNetworkBuffer8BitInteger(read_buffer);
748 printf("OP_STOP_PLAYING: %d [%d]\n", client_nr, cause_for_stopping);
749 Error(ERR_NETWORK_CLIENT, "client %d stops game [%d]",
750 client_nr, cause_for_stopping);
752 if (game_status == GAME_MODE_PLAYING)
754 int index_nr = client_nr - 1;
755 struct PlayerInfo *client_player = &stored_player[index_nr];
756 boolean stopped_by_remote_player = (!client_player->connected_locally);
759 if (cause_for_stopping == NETWORK_STOP_BY_PLAYER)
760 sprintf(message, "Network game stopped by player %d!", client_nr);
762 sprintf(message, (cause_for_stopping == NETWORK_STOP_BY_ERROR ?
763 "Network game stopped due to internal error!" :
764 "Network game stopped!"));
766 if (cause_for_stopping != NETWORK_STOP_BY_PLAYER ||
767 stopped_by_remote_player)
768 Request(message, REQ_CONFIRM | REQ_STAY_CLOSED);
770 SetGameStatus(GAME_MODE_MAIN);
776 static void Handle_OP_MOVE_PLAYER(void)
778 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
779 int server_frame_counter = getNetworkBuffer32BitInteger(read_buffer);
782 if (!network_playing)
785 if (server_frame_counter != FrameCounter)
787 Error(ERR_INFO, "frame counters of client %d and server out of sync",
789 Error(ERR_INFO, "frame counter of client is %d", FrameCounter);
790 Error(ERR_INFO, "frame counter of server is %d", server_frame_counter);
791 Error(ERR_INFO, "this should not happen -- please debug");
793 stop_network_game = TRUE;
798 /* copy valid player actions (will be set to 0 for not connected players) */
799 for (i = 0; i < MAX_PLAYERS; i++)
800 stored_player[i].effective_action =
801 getNetworkBuffer8BitInteger(read_buffer);
803 network_player_action_received = TRUE;
806 static void Handle_OP_BROADCAST_MESSAGE(void)
808 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
810 printf("OP_BROADCAST_MESSAGE: %d\n", player_nr);
811 Error(ERR_NETWORK_CLIENT, "client %d sends message", player_nr);
814 static void Handle_OP_LEVEL_FILE(void)
816 int player_nr = getNetworkBuffer8BitInteger(read_buffer);
817 char *leveldir_identifier;
818 char *network_level_dir;
819 struct LevelFileInfo *file_info = &network_level.file_info;
820 struct LevelFileInfo *tmpl_info = &network_level.tmpl_info;
821 boolean use_custom_template;
823 setString(&network_level.leveldir_identifier, NULL);
824 setString(&network_level.file_info.basename, NULL);
825 setString(&network_level.file_info.filename, NULL);
826 setString(&network_level.tmpl_info.basename, NULL);
827 setString(&network_level.tmpl_info.filename, NULL);
829 printf("OP_LEVEL_FILE: %d\n", player_nr);
831 leveldir_identifier = getStringCopy(getNetworkBufferString(read_buffer));
833 if (hasPathSeparator(leveldir_identifier))
834 Error(ERR_EXIT, "protocol error: invalid filename from network client");
836 InitNetworkLevelDirectory(leveldir_identifier);
838 network_level_dir = getNetworkLevelDir(leveldir_identifier);
840 file_info->nr = getNetworkBuffer16BitInteger(read_buffer);
841 file_info->type = getNetworkBuffer8BitInteger(read_buffer);
842 file_info->packed = getNetworkBuffer8BitInteger(read_buffer);
843 file_info->basename = getStringCopy(getNetworkBufferString(read_buffer));
844 file_info->filename = getPath2(network_level_dir, file_info->basename);
846 if (hasPathSeparator(file_info->basename))
847 Error(ERR_EXIT, "protocol error: invalid filename from network client");
849 getNetworkBufferFile(read_buffer, file_info->filename);
851 use_custom_template = getNetworkBuffer8BitInteger(read_buffer);
852 if (use_custom_template)
854 *tmpl_info = *file_info;
856 tmpl_info->basename = getStringCopy(getNetworkBufferString(read_buffer));
857 tmpl_info->filename = getPath2(network_level_dir, tmpl_info->basename);
859 if (hasPathSeparator(tmpl_info->basename))
860 Error(ERR_EXIT, "protocol error: invalid filename from network client");
862 getNetworkBufferFile(read_buffer, tmpl_info->filename);
865 network_level.leveldir_identifier = leveldir_identifier;
866 network_level.use_custom_template = use_custom_template;
868 /* the receiving client(s) use(s) the transferred network level files */
869 network_level.use_network_level_files = TRUE;
872 printf("::: '%s'\n", leveldir_identifier);
873 printf("::: '%d'\n", file_info->nr);
874 printf("::: '%d'\n", file_info->type);
875 printf("::: '%d'\n", file_info->packed);
876 printf("::: '%s'\n", file_info->basename);
877 printf("::: '%s'\n", file_info->filename);
879 if (use_custom_template)
880 printf("::: '%s'\n", tmpl_info->filename);
884 static void HandleNetworkingMessage(void)
886 stop_network_game = FALSE;
888 initNetworkBufferForReading(read_buffer);
890 int message_type = getNetworkBuffer8BitInteger(read_buffer);
892 switch (message_type)
894 case OP_BAD_PROTOCOL_VERSION:
895 Handle_OP_BAD_PROTOCOL_VERSION();
899 Handle_OP_YOUR_NUMBER();
902 case OP_NUMBER_WANTED:
903 Handle_OP_NUMBER_WANTED();
907 Handle_OP_PLAYER_NAME();
910 case OP_PLAYER_CONNECTED:
911 Handle_OP_PLAYER_CONNECTED();
914 case OP_PLAYER_DISCONNECTED:
915 Handle_OP_PLAYER_DISCONNECTED();
918 case OP_START_PLAYING:
919 Handle_OP_START_PLAYING();
922 case OP_PAUSE_PLAYING:
923 Handle_OP_PAUSE_PLAYING();
926 case OP_CONTINUE_PLAYING:
927 Handle_OP_CONTINUE_PLAYING();
930 case OP_STOP_PLAYING:
931 Handle_OP_STOP_PLAYING();
935 Handle_OP_MOVE_PLAYER();
938 case OP_BROADCAST_MESSAGE:
939 Handle_OP_BROADCAST_MESSAGE();
943 Handle_OP_LEVEL_FILE();
948 Error(ERR_NETWORK_CLIENT,
949 "unknown opcode %d from server", message_type);
954 /* in case of internal error, stop network game */
955 if (stop_network_game)
956 SendToServer_StopPlaying(NETWORK_STOP_BY_ERROR);
959 static char *HandleNetworkingPackets(void)
963 /* ---------- check network server for activity ---------- */
965 int num_active_sockets = SDLNet_CheckSockets(rfds, 0);
967 if (num_active_sockets < 0)
968 return "Error checking network sockets!";
970 if (num_active_sockets == 0)
971 break; // no active sockets, stop here
973 /* ---------- read packets from network server ---------- */
975 initNetworkBufferForReceiving(read_buffer);
977 int num_bytes = receiveNetworkBufferPacket(read_buffer, sfd);
980 return "Error reading from network server!";
983 return "Connection to network server lost!";
985 HandleNetworkingMessage();
987 if (stop_network_client)
988 return stop_network_client_message;
994 static void FreeNetworkClientPlayerInfo(struct NetworkClientPlayerInfo *player)
1000 FreeNetworkClientPlayerInfo(player->next);
1002 checked_free(player);
1005 static void HandleNetworkingDisconnect(void)
1009 SDLNet_TCP_DelSocket(rfds, sfd);
1010 SDLNet_TCP_Close(sfd);
1012 network_playing = FALSE;
1014 network.enabled = FALSE;
1015 network.connected = FALSE;
1017 setup.network_mode = FALSE;
1019 for (i = 0; i < MAX_PLAYERS; i++)
1020 stored_player[i].connected_network = FALSE;
1022 FreeNetworkClientPlayerInfo(first_player.next);
1024 first_player.nr = 0;
1025 first_player.next = NULL;
1028 void HandleNetworking(void)
1030 char *error_message = HandleNetworkingPackets();
1032 if (error_message != NULL)
1034 HandleNetworkingDisconnect();
1036 if (game_status == GAME_MODE_PLAYING)
1038 Request(error_message, REQ_CONFIRM | REQ_STAY_CLOSED);
1040 SetGameStatus(GAME_MODE_MAIN);
1046 Request(error_message, REQ_CONFIRM);
1048 if (game_status == GAME_MODE_MAIN)
1049 ClearNetworkPlayers();
1054 void DisconnectFromNetworkServer(void)
1056 DrawNetworkText_Title("Terminating Network");
1057 DrawNetworkText("Disconnecting from network server ...");
1059 HandleNetworkingDisconnect();
1061 DrawNetworkText_Success("Successfully disconnected!");