X-Git-Url: https://git.artsoft.org/?p=rocksndiamonds.git;a=blobdiff_plain;f=src%2Fnetwork.c;h=b0a6a0eee2fcc78096a6c25eae72a34cd4358b94;hp=655f9c8f3f8a2ce809bce1f9dfe786ff75c7e46b;hb=2b062aac2defaf49659459125225c82c309ba0f5;hpb=439b24a7e57f7af4081ef917fabe6b3cb78d902d diff --git a/src/network.c b/src/network.c index 655f9c8f..b0a6a0ee 100644 --- a/src/network.c +++ b/src/network.c @@ -1,38 +1,22 @@ -/*********************************************************** -* Rocks'n'Diamonds -- McDuffin Strikes Back! * -*----------------------------------------------------------* -* (c) 1995-2006 Artsoft Entertainment * -* Holger Schemel * -* Detmolder Strasse 189 * -* 33604 Bielefeld * -* Germany * -* e-mail: info@artsoft.org * -*----------------------------------------------------------* -* network.c * -***********************************************************/ - -#include "libgame/platform.h" - -#if defined(NETWORK_AVALIABLE) +// ============================================================================ +// 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 -#if defined(TARGET_SDL) -#include "main.h" -#else -#include -#include -#include -#include -#include -#include -#endif - #include "libgame/libgame.h" #include "network.h" #include "netserv.h" +#include "main.h" #include "game.h" #include "tape.h" #include "files.h" @@ -55,22 +39,98 @@ static struct NetworkClientPlayerInfo first_player = /* server stuff */ -#if defined(TARGET_SDL) -static TCPsocket sfd; /* server socket */ +static TCPsocket sfd; /* TCP server socket */ +static UDPsocket udp; /* UDP server socket */ static SDLNet_SocketSet rfds; /* socket set */ -#else -static int sfd; /* server socket */ -#endif 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; @@ -84,12 +144,7 @@ static void SendBufferToServer(int size) nwrite += 4 + size; /* directly send the buffer to the network server */ -#if defined(TARGET_SDL) SDLNet_TCP_Send(sfd, writbuffer, nwrite); -#else - if (write(sfd, writbuffer, nwrite) == -1) - Error(ERR_WARN, "write() failed; %s", strerror(errno)); -#endif nwrite = 0; } @@ -118,7 +173,7 @@ char *getNetworkPlayerName(int player_nr) return("you"); else for (player = &first_player; player; player = player->next) - if (player->nr == player_nr && player->name && strlen(player->name)) + if (player->nr == player_nr && strlen(player->name) > 0) return(player->name); return(EMPTY_PLAYER_NAME); @@ -126,7 +181,6 @@ char *getNetworkPlayerName(int player_nr) static void StartNetworkServer(int port) { -#if defined(TARGET_SDL) static int p; p = port; @@ -137,152 +191,162 @@ static void StartNetworkServer(int port) server_thread = SDL_CreateThread(NetworkServerThread, &p); #endif network_server = TRUE; - -#else - - switch (fork()) - { - case 0: - NetworkServer(port, options.serveronly); - - /* never reached */ - exit(0); - - case -1: - Error(ERR_WARN, - "cannot create network server process - no network playing"); - options.network = FALSE; - return; - - default: - /* we are parent process -- resume normal operation */ - return; - } -#endif } -#if defined(TARGET_SDL) 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) + { + // 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; + + SDLNet_Write32(0xffffffff, &ip_address.host); /* 255.255.255.255 */ + SDLNet_Write16(port, &ip_address.port); + + 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!"); + + 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!"); + } + rfds = SDLNet_AllocSocketSet(1); if (hostname) { SDLNet_ResolveHost(&ip, hostname, port); + if (ip.host == INADDR_NONE) Error(ERR_EXIT, "cannot locate host '%s'", hostname); + else + server_host = SDLNet_Read32(&ip.host); + + DrawNetworkText("Connecting to remote host ..."); } else { - SDLNet_Write32(0x7f000001, &ip.host); /* 127.0.0.1 */ - SDLNet_Write16(port, &ip.port); + // 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 */ + + SDLNet_Write32(server_host, &ip.host); + SDLNet_Write16(port, &ip.port); + + DrawNetworkText("Connecting to local host ..."); } + 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 = SDLNet_TCP_Open(&ip); if (sfd) { SDLNet_TCP_AddSocket(rfds, sfd); + + DrawNetworkText_Success("Successfully connected!"); + return TRUE; } else { + DrawNetworkText_Failed("Failed to connect to network server!"); + 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 */ - if ((sfd = SDLNet_TCP_Open(&ip))) /* connected */ { + DrawNetworkText_Success("Successfully connected!"); + SDLNet_TCP_AddSocket(rfds, sfd); return TRUE; } - } - - /* when reaching this point, connect to newly started server has failed */ - return FALSE; -} -#else - -boolean ConnectToServer(char *hostname, int port) -{ - struct sockaddr_in s; - struct protoent *tcpproto; - int on = 1, i; - - if (hostname) - { - if ((s.sin_addr.s_addr = inet_addr(hostname)) == -1) - { - struct hostent *host; - - if ((host = gethostbyname(hostname)) == NULL) - Error(ERR_EXIT, "cannot locate host '%s'", hostname); - - s.sin_addr = *(struct in_addr *)(host->h_addr_list[0]); - } + Delay_WithScreenUpdates(100); } - else - s.sin_addr.s_addr = inet_addr("127.0.0.1"); /* localhost */ - if (port == 0) - port = DEFAULT_SERVER_PORT; - - s.sin_port = htons(port); - s.sin_family = AF_INET; - - sfd = socket(PF_INET, SOCK_STREAM, 0); - if (sfd < 0) - Error(ERR_EXIT, "out of file descriptors"); - - if ((tcpproto = getprotobyname("tcp")) != NULL) - setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int)); - - if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) == 0) /* connected */ - return TRUE; - - if (hostname) /* connect to specified server failed */ - return FALSE; - - printf("No rocksndiamonds server on localhost -- starting up one ...\n"); - StartNetworkServer(port); - - /* wait for server to start up and try connecting several times */ - for (i = 0; i < 6; 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 (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0) /* connected */ - return TRUE; - } + DrawNetworkText_Failed("Failed to connect to network server!"); /* when reaching this point, connect to newly started server has failed */ return FALSE; } -#endif /* defined(TARGET_SDL) */ void SendToServer_PlayerName(char *player_name) { @@ -368,9 +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() @@ -385,17 +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, 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() @@ -423,17 +499,22 @@ 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? */ { @@ -447,6 +528,9 @@ static void Handle_OP_NUMBER_WANTED() 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) @@ -485,13 +569,14 @@ 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); @@ -502,6 +587,27 @@ static void Handle_OP_PLAYER_DISCONNECTED() 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() @@ -522,8 +628,9 @@ static void Handle_OP_START_PLAYING() { Error(ERR_WARN, "no such level identifier: '%s'", new_leveldir_identifier); - new_leveldir = leveldir_first; - Error(ERR_WARN, "using default level set: '%s'", new_leveldir->identifier); + stop_network_game = TRUE; + + return; } printf("OP_START_PLAYING: %d\n", buffer[0]); @@ -546,8 +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() @@ -555,8 +665,11 @@ 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() @@ -566,16 +679,25 @@ static void Handle_OP_STOP_PLAYING() if (game_status == GAME_MODE_PLAYING) { - if (buffer[2] == NETWORK_STOP_BY_PLAYER) - Request("Network game stopped by player!", REQ_CONFIRM); - else if (buffer[2] == NETWORK_STOP_BY_ERROR) - Request("Network game stopped due to internal error!", REQ_CONFIRM); - else - Request("Network game stopped!", REQ_CONFIRM); - } + 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 = GAME_MODE_MAIN; - DrawMainMenu(); + DrawMainMenu(); + } } static void Handle_OP_MOVE_PLAYER(unsigned int len) @@ -589,11 +711,6 @@ static void Handle_OP_MOVE_PLAYER(unsigned int len) server_frame_counter = (buffer[2] << 24) | (buffer[3] << 16) | (buffer[4] << 8) | (buffer[5]); -#if 0 - Error(ERR_NETWORK_CLIENT, "receiving server frame counter value %d [%d]", - server_frame_counter, FrameCounter); -#endif - if (server_frame_counter != FrameCounter) { Error(ERR_INFO, "client and servers frame counters out of sync"); @@ -609,7 +726,7 @@ static void Handle_OP_MOVE_PLAYER(unsigned int len) /* copy valid player actions */ for (i = 0; i < MAX_PLAYERS; i++) stored_player[i].effective_action = - (i < len - 6 && stored_player[i].active ? buffer[6 + i] : 0); + (i < len - 6 ? buffer[6 + i] : 0); network_player_action_received = TRUE; } @@ -690,60 +807,110 @@ static void HandleNetworkingMessages() SendToServer_StopPlaying(NETWORK_STOP_BY_ERROR); } -/* TODO */ +static char *HandleNetworkingPackets() +{ + while (1) + { + /* ---------- check network server for activity ---------- */ -void HandleNetworking() + int num_active_sockets = SDLNet_CheckSockets(rfds, 1); + + if (num_active_sockets < 0) + return "Error checking network sockets!"; + + if (num_active_sockets == 0) + break; // no active sockets, stop here + + /* ---------- read packets from network server ---------- */ + + int num_bytes = SDLNet_TCP_Recv(sfd, readbuffer + nread, 1); + + if (num_bytes < 0) + return "Error reading from network server!"; + + if (num_bytes == 0) + return "Connection to network server lost!"; + + nread += num_bytes; + + HandleNetworkingMessages(); + + if (stop_network_client) + return stop_network_client_message; + } + + return NULL; +} + +static void FreeNetworkClientPlayerInfo(struct NetworkClientPlayerInfo *player) { -#if !defined(TARGET_SDL) - static struct timeval tv = { 0, 0 }; - fd_set rfds; -#endif - int r = 0; + if (player == NULL) + return; - do - { -#if defined(TARGET_SDL) - if ((r = SDLNet_CheckSockets(rfds, 1)) < 0) - Error(ERR_EXIT, "HandleNetworking(): SDLNet_CheckSockets() failed"); + if (player->next) + FreeNetworkClientPlayerInfo(player->next); -#else + checked_free(player); +} - FD_ZERO(&rfds); - FD_SET(sfd, &rfds); +static void HandleNetworkingDisconnect() +{ + int i; - r = select(sfd + 1, &rfds, NULL, NULL, &tv); + SDLNet_TCP_DelSocket(rfds, sfd); + SDLNet_TCP_Close(sfd); - if (r < 0 && errno != EINTR) - Error(ERR_EXIT, "HandleNetworking(): select() failed"); + network_playing = FALSE; - if (r < 0) - FD_ZERO(&rfds); -#endif + network.enabled = FALSE; + network.connected = FALSE; -#if defined(TARGET_SDL) - if (r > 0) -#else - if (FD_ISSET(sfd, &rfds)) -#endif - { -#if defined(TARGET_SDL) - r = SDLNet_TCP_Recv(sfd, readbuffer + nread, 1); -#else - r = read(sfd, readbuffer + nread, MAX_BUFFER_SIZE - nread); -#endif + setup.network_mode = FALSE; - if (r < 0) - Error(ERR_EXIT, "error reading from network server"); + for (i = 0; i < MAX_PLAYERS; i++) + stored_player[i].connected_network = FALSE; - if (r == 0) - Error(ERR_EXIT, "connection to network server lost"); + FreeNetworkClientPlayerInfo(first_player.next); - nread += r; + first_player.nr = 0; + first_player.next = NULL; +} + +void HandleNetworking() +{ + char *error_message = HandleNetworkingPackets(); + + if (error_message != NULL) + { + HandleNetworkingDisconnect(); - HandleNetworkingMessages(); + 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(); } } - while (r > 0); } -#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); +}