X-Git-Url: https://git.artsoft.org/?p=rocksndiamonds.git;a=blobdiff_plain;f=src%2Fnetwork.c;h=b0a6a0eee2fcc78096a6c25eae72a34cd4358b94;hp=822b7ee02bdf8f85e14942463ba8540ccb1e4200;hb=2b062aac2defaf49659459125225c82c309ba0f5;hpb=2ae6ae8ed951e87fcba7c363705cd6ddea8de91c diff --git a/src/network.c b/src/network.c index 822b7ee0..b0a6a0ee 100644 --- a/src/network.c +++ b/src/network.c @@ -1,35 +1,22 @@ -/*********************************************************** -* Rocks'n'Diamonds -- McDuffin Strikes Back! * -*----------------------------------------------------------* -* (c) 1995-2000 Artsoft Entertainment * -* Holger Schemel * -* Detmolder Strasse 189 * -* 33604 Bielefeld * -* Germany * -* e-mail: info@artsoft.org * -*----------------------------------------------------------* -* network.c * -***********************************************************/ - -#include "libgame/libgame.h" - -#if defined(PLATFORM_UNIX) +// ============================================================================ +// Rocks'n'Diamonds - McDuffin Strikes Back! +// ---------------------------------------------------------------------------- +// (c) 1995-2014 by Artsoft Entertainment +// Holger Schemel +// info@artsoft.org +// http://www.artsoft.org/ +// ---------------------------------------------------------------------------- +// network.c +// ============================================================================ #include #include -#include -#include -#include -#include -#include -#include - -#if 0 + #include "libgame/libgame.h" -#endif #include "network.h" #include "netserv.h" +#include "main.h" #include "game.h" #include "tape.h" #include "files.h" @@ -52,15 +39,98 @@ static struct NetworkClientPlayerInfo first_player = /* server stuff */ -static int sfd; +static TCPsocket sfd; /* TCP server socket */ +static UDPsocket udp; /* UDP server socket */ +static SDLNet_SocketSet rfds; /* socket set */ + static byte realbuffer[512]; static byte readbuffer[MAX_BUFFER_SIZE], writbuffer[MAX_BUFFER_SIZE]; static byte *buffer = realbuffer + 4; static int nread = 0, nwrite = 0; +static boolean stop_network_game = FALSE; +static boolean stop_network_client = FALSE; +static char stop_network_client_message[MAX_OUTPUT_LINESIZE + 1]; + +static void DrawNetworkTextExt(char *message, int font_nr, boolean initialize) +{ + static int xpos = 0, ypos = 0; + static int max_line_width = 0; + int font_width = getFontWidth(font_nr); + int font_height = getFontHeight(font_nr); + int ypos_1 = 120; + int ypos_2 = 150; + + if (initialize) + { + if (game_status == GAME_MODE_LOADING) + { + max_line_width = WIN_XSIZE; + + xpos = (max_line_width - getTextWidth(message, font_nr)) / 2; + ypos = ypos_1; + + DrawText(xpos, ypos, message, font_nr); + + xpos = 0; + ypos = ypos_2; + } + else + { + max_line_width = SXSIZE; + + DrawTextSCentered(ypos_1, font_nr, message); + + /* calculate offset to x position caused by rounding */ + int max_chars_per_line = max_line_width / font_width; + int xoffset = (max_line_width - max_chars_per_line * font_width) / 2; + + xpos = SX + xoffset; + ypos = SY + ypos_2; + } + + Error(ERR_DEBUG, "========== %s ==========", message); + } + else + { + int max_chars_per_line = max_line_width / font_width; + int max_lines_per_text = 10; + int num_lines_spacing = (font_nr == FC_YELLOW ? 1 : 3); + int num_lines_printed = DrawTextBuffer(xpos, ypos, message, font_nr, + max_chars_per_line, -1, + max_lines_per_text, 0, -1, + TRUE, TRUE, FALSE); + + ypos += (num_lines_printed + num_lines_spacing) * font_height; + + Error(ERR_DEBUG, "%s", message); + } + + BackToFront(); +} + +static void DrawNetworkText(char *message) +{ + DrawNetworkTextExt(message, FC_YELLOW, FALSE); +} + +static void DrawNetworkText_Success(char *message) +{ + DrawNetworkTextExt(message, FC_GREEN, FALSE); +} + +static void DrawNetworkText_Failed(char *message) +{ + DrawNetworkTextExt(message, FC_RED, FALSE); +} + +static void DrawNetworkText_Title(char *message) +{ + DrawNetworkTextExt(message, FC_GREEN, TRUE); +} static void SendBufferToServer(int size) { - if (!options.network) + if (!network.enabled) return; realbuffer[0] = realbuffer[1] = realbuffer[2] = 0; @@ -74,7 +144,7 @@ static void SendBufferToServer(int size) nwrite += 4 + size; /* directly send the buffer to the network server */ - write(sfd, writbuffer, nwrite); + SDLNet_TCP_Send(sfd, writbuffer, nwrite); nwrite = 0; } @@ -102,8 +172,8 @@ char *getNetworkPlayerName(int player_nr) else if (player_nr == first_player.nr) return("you"); else - for (player=&first_player; player; player=player->next) - if (player->nr == player_nr && player->name && strlen(player->name)) + for (player = &first_player; player; player = player->next) + if (player->nr == player_nr && strlen(player->name) > 0) return(player->name); return(EMPTY_PLAYER_NAME); @@ -111,85 +181,169 @@ char *getNetworkPlayerName(int player_nr) static void StartNetworkServer(int port) { - switch (fork()) + static int p; + + p = port; +#if defined(TARGET_SDL2) + server_thread = SDL_CreateThread(NetworkServerThread, + "NetworkServerThread", &p); +#else + server_thread = SDL_CreateThread(NetworkServerThread, &p); +#endif + network_server = TRUE; +} + +boolean ConnectToServer(char *hostname, int port) +{ + IPaddress ip; + int server_host = 0; + int i; + + DrawNetworkText_Title("Initializing Network"); + + if (port == 0) + port = DEFAULT_SERVER_PORT; + + if (hostname == NULL) { - case 0: - NetworkServer(port, options.serveronly); + // if no hostname given, try to auto-detect network server in local network + // by doing a UDP broadcast on the network server port and wait for answer + + SDLNet_SocketSet udp_socket_set = SDLNet_AllocSocketSet(1); + if (!udp_socket_set) + Error(ERR_EXIT, "SDLNet_AllocSocketSet() failed: %s"), SDLNet_GetError(); + + udp = SDLNet_UDP_Open(0); + if(!udp) + Error(ERR_EXIT, "SDLNet_UDP_Open() failed: %s", SDLNet_GetError()); + + if (SDLNet_UDP_AddSocket(udp_socket_set, udp) == -1) + Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_TCP_AddSocket() failed: %s"), + SDLNet_GetError(); + + char *data_ptr = "network server UDB broadcast"; + int data_len = strlen(data_ptr) + 1; + IPaddress ip_address; - /* never reached */ - exit(0); + SDLNet_Write32(0xffffffff, &ip_address.host); /* 255.255.255.255 */ + SDLNet_Write16(port, &ip_address.port); - case -1: - Error(ERR_WARN, - "cannot create network server process - no network playing"); - options.network = FALSE; - return; + UDPpacket packet = + { + -1, + (Uint8 *)data_ptr, + data_len, + data_len, + 0, + ip_address + }; + + SDLNet_UDP_Send(udp, -1, &packet); + + DrawNetworkText("Looking for local network server ..."); + + /* wait for any local network server to answer UDP broadcast */ + for (i = 0; i < 5; i++) + { + if (SDLNet_CheckSockets(udp_socket_set, 0) == 1) + { + int num_packets = SDLNet_UDP_Recv(udp, &packet); + + if (num_packets == 1) + { + DrawNetworkText_Success("Network server found!"); - default: - /* we are parent process -- resume normal operation */ - return; + server_host = SDLNet_Read32(&packet.address.host); + } + else + { + DrawNetworkText_Failed("No answer from network server!"); + } + + break; + } + else + { + Delay_WithScreenUpdates(100); + } + } + + if (server_host == 0) + DrawNetworkText_Failed("No network server found!"); } -} -boolean ConnectToServer(char *hostname, int port) -{ - struct sockaddr_in s; - struct protoent *tcpproto; - int on = 1, i; + rfds = SDLNet_AllocSocketSet(1); if (hostname) { - if ((s.sin_addr.s_addr = inet_addr(hostname)) == -1) - { - struct hostent *host; + SDLNet_ResolveHost(&ip, hostname, port); - if ((host = gethostbyname(hostname)) == NULL) - Error(ERR_EXIT, "cannot locate host '%s'", hostname); + if (ip.host == INADDR_NONE) + Error(ERR_EXIT, "cannot locate host '%s'", hostname); + else + server_host = SDLNet_Read32(&ip.host); - s.sin_addr = *(struct in_addr *)(host->h_addr_list[0]); - } + DrawNetworkText("Connecting to remote host ..."); } else - s.sin_addr.s_addr = inet_addr("127.0.0.1"); /* localhost */ + { + // if no hostname was given and no network server was auto-detected in the + // local network, try to connect to a network server at the local host + if (server_host == 0) + server_host = 0x7f000001; /* 127.0.0.1 */ - if (port == 0) - port = DEFAULT_SERVER_PORT; + SDLNet_Write32(server_host, &ip.host); + SDLNet_Write16(port, &ip.port); + + DrawNetworkText("Connecting to local host ..."); + } - s.sin_port = htons(port); - s.sin_family = AF_INET; + Error(ERR_DEBUG, "trying to connect to network server at %d.%d.%d.%d ...", + (server_host >> 24) & 0xff, + (server_host >> 16) & 0xff, + (server_host >> 8) & 0xff, + (server_host >> 0) & 0xff); - sfd = socket(PF_INET, SOCK_STREAM, 0); - if (sfd < 0) - Error(ERR_EXIT, "out of file descriptors"); + sfd = SDLNet_TCP_Open(&ip); + + if (sfd) + { + SDLNet_TCP_AddSocket(rfds, sfd); - if ((tcpproto = getprotobyname("tcp")) != NULL) - setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int)); + DrawNetworkText_Success("Successfully connected!"); - if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) == 0) /* connected */ return TRUE; + } + else + { + DrawNetworkText_Failed("Failed to connect to network server!"); - if (hostname) /* connect to specified server failed */ + printf("SDLNet_TCP_Open(): %s\n", SDLNet_GetError()); + } + + if (hostname) /* connect to specified server failed */ return FALSE; - printf("No rocksndiamonds server on localhost - starting up one ...\n"); + DrawNetworkText("Starting new local network server ..."); + StartNetworkServer(port); /* wait for server to start up and try connecting several times */ - for (i=0; i<6; i++) + for (i = 0; i < 30; i++) { - Delay(500); /* wait 500 ms == 0.5 seconds */ - close(sfd); - - sfd = socket(PF_INET, SOCK_STREAM, 0); - if (sfd < 0) - Error(ERR_EXIT, "out of file descriptors"); - - setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int)); + if ((sfd = SDLNet_TCP_Open(&ip))) /* connected */ + { + DrawNetworkText_Success("Successfully connected!"); - if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0) /* connected */ + SDLNet_TCP_AddSocket(rfds, sfd); return TRUE; + } + + Delay_WithScreenUpdates(100); } + DrawNetworkText_Failed("Failed to connect to network server!"); + /* when reaching this point, connect to newly started server has failed */ return FALSE; } @@ -224,7 +378,7 @@ void SendToServer_NrWanted(int nr_wanted) void SendToServer_StartPlaying() { - unsigned long new_random_seed = InitRND(NEW_RANDOMIZE); + unsigned int new_random_seed = InitRND(level.random_seed); int dummy = 0; /* !!! HAS NO MEANING ANYMORE !!! */ /* the name of the level must be enough */ @@ -240,9 +394,9 @@ void SendToServer_StartPlaying() buffer[8] = (unsigned char)((new_random_seed >> 8) & 0xff); buffer[9] = (unsigned char)((new_random_seed >> 0) & 0xff); - strcpy((char *)&buffer[10], leveldir_current->filename); + strcpy((char *)&buffer[10], leveldir_current->identifier); - SendBufferToServer(10 + strlen(leveldir_current->filename) + 1); + SendBufferToServer(10 + strlen(leveldir_current->identifier) + 1); } void SendToServer_PausePlaying() @@ -259,16 +413,17 @@ void SendToServer_ContinuePlaying() SendBufferToServer(2); } -void SendToServer_StopPlaying() +void SendToServer_StopPlaying(int cause_for_stopping) { buffer[1] = OP_STOP_PLAYING; + buffer[2] = cause_for_stopping; - SendBufferToServer(2); + SendBufferToServer(3); } void SendToServer_MovePlayer(byte player_action) { - buffer[1] = OP_MOVE_FIGURE; + buffer[1] = OP_MOVE_PLAYER; buffer[2] = player_action; SendBufferToServer(3); @@ -277,9 +432,15 @@ void SendToServer_MovePlayer(byte player_action) static void Handle_OP_BAD_PROTOCOL_VERSION() { Error(ERR_WARN, "protocol version mismatch"); - Error(ERR_EXIT, "server expects %d.%d.x instead of %d.%d.%d", + Error(ERR_WARN, "server expects %d.%d.x instead of %d.%d.%d", buffer[2], buffer[3], PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3); + + sprintf(stop_network_client_message, "Network protocol version mismatch! Server expects version %d.%d.x instead of %d.%d.%d!", + buffer[2], buffer[3], + PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3); + + stop_network_client = TRUE; } static void Handle_OP_YOUR_NUMBER() @@ -294,17 +455,23 @@ static void Handle_OP_YOUR_NUMBER() if (old_local_player != new_local_player) { - /* copy existing player settings and change to new player */ + /* set relevant player settings and change to new player */ - *new_local_player = *old_local_player; - old_local_player->connected = FALSE; local_player = new_local_player; + + old_local_player->connected_locally = FALSE; + new_local_player->connected_locally = TRUE; + + old_local_player->connected_network = FALSE; + new_local_player->connected_network = TRUE; } if (first_player.nr > MAX_PLAYERS) - Error(ERR_EXIT, "sorry - no more than %d players", MAX_PLAYERS); + Error(ERR_EXIT, "sorry, more than %d players not allowed", MAX_PLAYERS); Error(ERR_NETWORK_CLIENT, "you get client # %d", new_client_nr); + + stored_player[new_index_nr].connected_network = TRUE; } static void Handle_OP_NUMBER_WANTED() @@ -332,30 +499,38 @@ static void Handle_OP_NUMBER_WANTED() if (old_client_nr != new_client_nr) { - /* copy existing player settings and change to new player */ + /* set relevant player settings and change to new player */ - *new_player = *old_player; - old_player->connected = FALSE; + old_player->connected_network = FALSE; + new_player->connected_network = TRUE; } player = getNetworkPlayer(old_client_nr); player->nr = new_client_nr; if (old_player == local_player) /* local player switched */ + { local_player = new_player; + + old_player->connected_locally = FALSE; + new_player->connected_locally = TRUE; + } } else if (old_client_nr == first_player.nr) /* failed -- local player? */ { - char *color[] = { "yellow", "red", "green", "blue" }; char request[100]; - sprintf(request, "Sorry ! %s player still exists ! You are %s player !", - color[index_nr_wanted], color[new_index_nr]); + sprintf(request, "Sorry! Player %d already exists! You are player %d!", + index_nr_wanted + 1, new_index_nr + 1); + Request(request, REQ_CONFIRM); Error(ERR_NETWORK_CLIENT, "cannot switch -- you keep client # %d", new_client_nr); } + + if (game_status == GAME_MODE_MAIN) + DrawNetworkPlayers(); } static void Handle_OP_PLAYER_NAME(unsigned int len) @@ -380,7 +555,7 @@ static void Handle_OP_PLAYER_CONNECTED() printf("OP_PLAYER_CONNECTED: %d\n", new_client_nr); Error(ERR_NETWORK_CLIENT, "new client %d connected", new_client_nr); - for (player=&first_player; player; player=player->next) + for (player = &first_player; player; player = player->next) { if (player->nr == new_client_nr) Error(ERR_EXIT, "multiplayer server sent duplicate player id"); @@ -394,52 +569,74 @@ static void Handle_OP_PLAYER_CONNECTED() player->name[0] = '\0'; player->next = NULL; - stored_player[new_index_nr].connected = TRUE; + stored_player[new_index_nr].connected_network = TRUE; } static void Handle_OP_PLAYER_DISCONNECTED() { struct NetworkClientPlayerInfo *player, *player_disconnected; int player_nr = (int)buffer[0]; + int index_nr = player_nr - 1; printf("OP_PLAYER_DISCONNECTED: %d\n", player_nr); player_disconnected = getNetworkPlayer(player_nr); Error(ERR_NETWORK_CLIENT, "client %d (%s) disconnected", player_nr, getNetworkPlayerName(buffer[0])); - for (player=&first_player; player; player=player->next) + for (player = &first_player; player; player = player->next) if (player->next == player_disconnected) player->next = player_disconnected->next; free(player_disconnected); + + stored_player[index_nr].connected_locally = FALSE; + stored_player[index_nr].connected_network = FALSE; + + if (game_status == GAME_MODE_PLAYING) + { + char message[100]; + + sprintf(message, "Player %d left network server! Network game stopped!", + player_nr); + + Request(message, REQ_CONFIRM | REQ_STAY_CLOSED); + + SetGameStatus(GAME_MODE_MAIN); + + DrawMainMenu(); + } + else if (game_status == GAME_MODE_MAIN) + { + DrawNetworkPlayers(); + } } static void Handle_OP_START_PLAYING() { - struct LevelDirInfo *new_leveldir; + LevelDirTree *new_leveldir; int new_level_nr; - int dummy; /* !!! HAS NO MEANING ANYMORE !!! */ - unsigned long new_random_seed; - char *new_leveldir_filename; + unsigned int new_random_seed; + char *new_leveldir_identifier; new_level_nr = (buffer[2] << 8) + buffer[3]; - dummy = (buffer[4] << 8) + buffer[5]; new_random_seed = (buffer[6] << 24) | (buffer[7] << 16) | (buffer[8] << 8) | (buffer[9]); - new_leveldir_filename = (char *)&buffer[10]; + new_leveldir_identifier = (char *)&buffer[10]; - new_leveldir = getLevelDirInfoFromFilename(new_leveldir_filename); + new_leveldir = getTreeInfoFromIdentifier(leveldir_first, + new_leveldir_identifier); if (new_leveldir == NULL) { - Error(ERR_WARN, "no such level directory: '%s'", new_leveldir_filename); + Error(ERR_WARN, "no such level identifier: '%s'", new_leveldir_identifier); - new_leveldir = leveldir_first; - Error(ERR_WARN, "using default level directory: '%s'", new_leveldir->name); + stop_network_game = TRUE; + + return; } printf("OP_START_PLAYING: %d\n", buffer[0]); Error(ERR_NETWORK_CLIENT, - "client %d starts game [level %d from leveldir '%s']\n", - buffer[0], new_level_nr, new_leveldir->name); + "client %d starts game [level %d from level identifier '%s']\n", + buffer[0], new_level_nr, new_leveldir->identifier); leveldir_current = new_leveldir; level_nr = new_level_nr; @@ -448,16 +645,7 @@ static void Handle_OP_START_PLAYING() LoadTape(level_nr); LoadLevel(level_nr); - if (setup.autorecord) - TapeStartRecording(); - - if (tape.recording) - tape.random_seed = new_random_seed; - - InitRND(new_random_seed); - - game_status = PLAYING; - InitGame(); + StartGameActions(FALSE, setup.autorecord, new_random_seed); } static void Handle_OP_PAUSE_PLAYING() @@ -465,8 +653,11 @@ static void Handle_OP_PAUSE_PLAYING() printf("OP_PAUSE_PLAYING: %d\n", buffer[0]); Error(ERR_NETWORK_CLIENT, "client %d pauses game", buffer[0]); - tape.pausing = TRUE; - DrawVideoDisplay(VIDEO_STATE_PAUSE_ON,0); + if (game_status == GAME_MODE_PLAYING) + { + tape.pausing = TRUE; + DrawVideoDisplay(VIDEO_STATE_PAUSE_ON,0); + } } static void Handle_OP_CONTINUE_PLAYING() @@ -474,20 +665,42 @@ static void Handle_OP_CONTINUE_PLAYING() printf("OP_CONTINUE_PLAYING: %d\n", buffer[0]); Error(ERR_NETWORK_CLIENT, "client %d continues game", buffer[0]); - tape.pausing = FALSE; - DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0); + if (game_status == GAME_MODE_PLAYING) + { + tape.pausing = FALSE; + DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0); + } } static void Handle_OP_STOP_PLAYING() { - printf("OP_STOP_PLAYING: %d\n", buffer[0]); - Error(ERR_NETWORK_CLIENT, "client %d stops game", buffer[0]); + printf("OP_STOP_PLAYING: %d [%d]\n", buffer[0], buffer[2]); + Error(ERR_NETWORK_CLIENT, "client %d stops game [%d]", buffer[0], buffer[2]); + + if (game_status == GAME_MODE_PLAYING) + { + int client_nr = buffer[0]; + int index_nr = client_nr - 1; + struct PlayerInfo *client_player = &stored_player[index_nr]; + boolean stopped_by_remote_player = (!client_player->connected_locally); + char message[100]; + + sprintf(message, (buffer[2] == NETWORK_STOP_BY_PLAYER ? + "Network game stopped by player %d!" : + buffer[2] == NETWORK_STOP_BY_ERROR ? + "Network game stopped due to internal error!" : + "Network game stopped!"), client_nr); + + if (buffer[2] != NETWORK_STOP_BY_PLAYER || stopped_by_remote_player) + Request(message, REQ_CONFIRM | REQ_STAY_CLOSED); + + SetGameStatus(GAME_MODE_MAIN); - game_status = MAINMENU; - DrawMainMenu(); + DrawMainMenu(); + } } -static void Handle_OP_MOVE_FIGURE(unsigned int len) +static void Handle_OP_MOVE_PLAYER(unsigned int len) { int server_frame_counter; int i; @@ -500,16 +713,20 @@ static void Handle_OP_MOVE_FIGURE(unsigned int len) if (server_frame_counter != FrameCounter) { - Error(ERR_RETURN, "client and servers frame counters out of sync"); - Error(ERR_RETURN, "frame counter of client is %d", FrameCounter); - Error(ERR_RETURN, "frame counter of server is %d", server_frame_counter); - Error(ERR_EXIT, "this should not happen -- please debug"); + Error(ERR_INFO, "client and servers frame counters out of sync"); + Error(ERR_INFO, "frame counter of client is %d", FrameCounter); + Error(ERR_INFO, "frame counter of server is %d", server_frame_counter); + Error(ERR_INFO, "this should not happen -- please debug"); + + stop_network_game = TRUE; + + return; } /* copy valid player actions */ - for (i=0; i= 4 && nread >= 4 + readbuffer[3]) { message_length = readbuffer[3]; @@ -528,7 +747,7 @@ static void HandleNetworkingMessages() nread -= 4 + message_length; memmove(readbuffer, readbuffer + 4 + message_length, nread); - switch(buffer[1]) + switch (buffer[1]) { case OP_BAD_PROTOCOL_VERSION: Handle_OP_BAD_PROTOCOL_VERSION(); @@ -570,8 +789,8 @@ static void HandleNetworkingMessages() Handle_OP_STOP_PLAYING(); break; - case OP_MOVE_FIGURE: - Handle_OP_MOVE_FIGURE(message_length); + case OP_MOVE_PLAYER: + Handle_OP_MOVE_PLAYER(message_length); break; case OP_BROADCAST_MESSAGE: @@ -582,41 +801,116 @@ static void HandleNetworkingMessages() } fflush(stdout); + + /* in case of internal error, stop network game */ + if (stop_network_game) + SendToServer_StopPlaying(NETWORK_STOP_BY_ERROR); } -void HandleNetworking() +static char *HandleNetworkingPackets() { - static struct timeval tv = { 0, 0 }; - fd_set rfds; - int r = 0; - - FD_ZERO(&rfds); - FD_SET(sfd, &rfds); + while (1) + { + /* ---------- check network server for activity ---------- */ - r = select(sfd + 1, &rfds, NULL, NULL, &tv); + int num_active_sockets = SDLNet_CheckSockets(rfds, 1); - if (r < 0 && errno != EINTR) - Error(ERR_EXIT, "HandleNetworking(): select() failed"); + if (num_active_sockets < 0) + return "Error checking network sockets!"; - if (r < 0) - FD_ZERO(&rfds); + if (num_active_sockets == 0) + break; // no active sockets, stop here - if (FD_ISSET(sfd, &rfds)) - { - int r; + /* ---------- read packets from network server ---------- */ - r = read(sfd, readbuffer + nread, MAX_BUFFER_SIZE - nread); + int num_bytes = SDLNet_TCP_Recv(sfd, readbuffer + nread, 1); - if (r < 0) - Error(ERR_EXIT, "error reading from network server"); + if (num_bytes < 0) + return "Error reading from network server!"; - if (r == 0) - Error(ERR_EXIT, "connection to network server lost"); + if (num_bytes == 0) + return "Connection to network server lost!"; - nread += r; + nread += num_bytes; HandleNetworkingMessages(); + + if (stop_network_client) + return stop_network_client_message; + } + + return NULL; +} + +static void FreeNetworkClientPlayerInfo(struct NetworkClientPlayerInfo *player) +{ + if (player == NULL) + return; + + if (player->next) + FreeNetworkClientPlayerInfo(player->next); + + checked_free(player); +} + +static void HandleNetworkingDisconnect() +{ + int i; + + SDLNet_TCP_DelSocket(rfds, sfd); + SDLNet_TCP_Close(sfd); + + network_playing = FALSE; + + network.enabled = FALSE; + network.connected = FALSE; + + setup.network_mode = FALSE; + + for (i = 0; i < MAX_PLAYERS; i++) + stored_player[i].connected_network = FALSE; + + FreeNetworkClientPlayerInfo(first_player.next); + + first_player.nr = 0; + first_player.next = NULL; +} + +void HandleNetworking() +{ + char *error_message = HandleNetworkingPackets(); + + if (error_message != NULL) + { + HandleNetworkingDisconnect(); + + if (game_status == GAME_MODE_PLAYING) + { + Request(error_message, REQ_CONFIRM | REQ_STAY_CLOSED); + + SetGameStatus(GAME_MODE_MAIN); + + DrawMainMenu(); + } + else + { + Request(error_message, REQ_CONFIRM); + + if (game_status == GAME_MODE_MAIN) + ClearNetworkPlayers(); + } } } -#endif /* PLATFORM_UNIX */ +void DisconnectFromNetworkServer() +{ + DrawNetworkText_Title("Terminating Network"); + DrawNetworkText("Disconnecting from network server ..."); + + HandleNetworkingDisconnect(); + + DrawNetworkText_Success("Successfully disconnected!"); + + /* short time to recognize result of network initialization */ + Delay_WithScreenUpdates(1000); +}