X-Git-Url: https://git.artsoft.org/?p=rocksndiamonds.git;a=blobdiff_plain;f=src%2Fnetwork.c;h=6c1f4c6de4d1bd5d91674188fed45a725eb845cb;hp=410695be366b1441a4899a1a573d58f7a444a309;hb=98d421667c21a07ab69dd881f1435c2f595ddd4c;hpb=da14f69fd95c7bd5a0d70cdf4935af06f1f20a04 diff --git a/src/network.c b/src/network.c index 410695be..6c1f4c6d 100644 --- a/src/network.c +++ b/src/network.c @@ -1,40 +1,28 @@ -/*********************************************************** -* Rocks'n'Diamonds -- McDuffin Strikes Back! * -*----------------------------------------------------------* -* (c) 1995-98 Artsoft Entertainment * -* Holger Schemel * -* Oststrasse 11a * -* 33604 Bielefeld * -* phone: ++49 +521 290471 * -* email: aeglos@valinor.owl.de * -*----------------------------------------------------------* -* 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" #include "tools.h" #include "screens.h" +#include "init.h" struct NetworkClientPlayerInfo { @@ -50,35 +38,111 @@ static struct NetworkClientPlayerInfo first_player = NULL }; -/* server stuff */ +// server stuff -static int sfd; -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 TCPsocket sfd; // TCP server socket +static UDPsocket udp; // UDP server socket +static SDLNet_SocketSet rfds; // socket set -static void SendBufferToServer(int size) +static struct NetworkBuffer *read_buffer = NULL; +static struct NetworkBuffer *write_buffer = NULL; + +static boolean stop_network_game = FALSE; +static boolean stop_network_client = FALSE; +static char stop_network_client_message[MAX_OUTPUT_LINESIZE + 1]; + +static struct NetworkLevelInfo network_level; + +static void DrawNetworkTextExt(char *message, int font_nr, boolean initialize) { - if (!options.network) - return; + 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; - realbuffer[0] = realbuffer[1] = realbuffer[2] = 0; - realbuffer[3] = (byte)size; - buffer[0] = 0; + DrawText(xpos, ypos, message, font_nr); - if (nwrite + 4 + size >= MAX_BUFFER_SIZE) - Error(ERR_EXIT, "internal error: network send buffer overflow"); + xpos = 0; + ypos = ypos_2; + } + else + { + max_line_width = SXSIZE; - memcpy(writbuffer + nwrite, realbuffer, 4 + size); - nwrite += 4 + size; + DrawTextSCentered(ypos_1, font_nr, message); - /* directly send the buffer to the network server */ - write(sfd, writbuffer, nwrite); - nwrite = 0; + // 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); } -struct NetworkClientPlayerInfo *getNetworkPlayer(int player_nr) +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 SendNetworkBufferToServer(struct NetworkBuffer *nb) +{ + if (!network.enabled) + return; + + // set message length header + putNetwork32BitInteger(nb->buffer, nb->size - 4); + + // directly send the buffer to the network server + SDLNet_TCP_Send(sfd, nb->buffer, nb->size); +} + +static struct NetworkClientPlayerInfo *getNetworkPlayer(int player_nr) { struct NetworkClientPlayerInfo *player = NULL; @@ -86,7 +150,7 @@ struct NetworkClientPlayerInfo *getNetworkPlayer(int player_nr) if (player->nr == player_nr) break; - if (player == NULL) /* should not happen */ + if (player == NULL) // should not happen Error(ERR_EXIT, "protocol error: reference to non-existing player %d", player_nr); @@ -102,285 +166,479 @@ 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); } -static void StartNetworkServer(int port) +boolean hasStartedNetworkGame(void) { - switch (fork()) - { - case 0: - NetworkServer(port, options.serveronly); + return !network_level.use_network_level_files; +} + +static boolean hasPathSeparator(char *s) +{ + return (strchr(s, '/') != NULL); +} - /* never reached */ - exit(0); +static void StartNetworkServer(int port) +{ + static int p; - case -1: - Error(ERR_WARN, - "cannot create network server process - no network playing"); - options.network = FALSE; - return; + p = port; - default: - /* we are parent process -- resume normal operation */ - return; - } + server_thread = SDL_CreateThread(NetworkServerThread, + "NetworkServerThread", &p); + network_server = TRUE; } boolean ConnectToServer(char *hostname, int port) { - struct sockaddr_in s; - struct protoent *tcpproto; - int on = 1, i; + IPaddress ip; + int server_host = 0; + int i; + + if (read_buffer == NULL) + read_buffer = newNetworkBuffer(); + + if (write_buffer == NULL) + write_buffer = newNetworkBuffer(); + + 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 nearby network server ..."); + + // wait for any nearby 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) + { + char message[100]; + + server_host = SDLNet_Read32(&packet.address.host); + + sprintf(message, "Network server found at %d.%d.%d.%d!", + (server_host >> 24) & 0xff, + (server_host >> 16) & 0xff, + (server_host >> 8) & 0xff, + (server_host >> 0) & 0xff); + + DrawNetworkText_Success(message); + } + else + { + DrawNetworkText_Failed("No answer from network server!"); + } + + break; + } + else + { + Delay_WithScreenUpdates(100); + } + } + + if (server_host == 0) + DrawNetworkText_Failed("No nearby network server found!"); + } + + rfds = SDLNet_AllocSocketSet(1); if (hostname) { - if ((s.sin_addr.s_addr = inet_addr(hostname)) == -1) + char message[100]; + + SDLNet_ResolveHost(&ip, hostname, port); + + if (ip.host == INADDR_NONE) { - struct hostent *host; + sprintf(message, "Failed to resolve network server hostname '%s'!", + hostname); - if ((host = gethostbyname(hostname)) == NULL) - Error(ERR_EXIT, "cannot locate host '%s'", hostname); + DrawNetworkText_Failed(message); - s.sin_addr = *(struct in_addr *)(host->h_addr_list[0]); + return FALSE; + } + else + { + server_host = SDLNet_Read32(&ip.host); } + + sprintf(message, "Connecting to network server host %s ...", hostname); + + DrawNetworkText(message); } 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; + DrawNetworkText("Looking for local network server ..."); + } + else + { + DrawNetworkText("Connecting to network server ..."); + } - s.sin_port = htons(port); - s.sin_family = AF_INET; + SDLNet_Write32(server_host, &ip.host); + SDLNet_Write16(port, &ip.port); + } - sfd = socket(PF_INET, SOCK_STREAM, 0); - if (sfd < 0) - Error(ERR_EXIT, "out of file descriptors"); + 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); - if ((tcpproto = getprotobyname("tcp")) != NULL) - setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int)); + sfd = SDLNet_TCP_Open(&ip); + + if (sfd) + { + SDLNet_TCP_AddSocket(rfds, sfd); + + DrawNetworkText_Success("Successfully connected!"); - if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) == 0) /* connected */ return TRUE; + } + else + { + if (hostname) + DrawNetworkText_Failed("Failed to connect to network server!"); + else + DrawNetworkText_Failed("No local network server found!"); + + printf("SDLNet_TCP_Open(): %s\n", SDLNet_GetError()); + } - if (hostname) /* connect to specified server failed */ + 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++) + // wait for server to start up and try connecting several times + 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"); + if ((sfd = SDLNet_TCP_Open(&ip))) // connected + { + DrawNetworkText_Success("Successfully connected to newly started network server!"); - setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int)); + SDLNet_TCP_AddSocket(rfds, sfd); - if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0) /* connected */ return TRUE; + } + + Delay_WithScreenUpdates(100); } - /* when reaching this point, connect to newly started server has failed */ + DrawNetworkText_Failed("Failed to connect to newly started network server!"); + + // when reaching this point, connect to newly started server has failed return FALSE; } void SendToServer_PlayerName(char *player_name) { - int len_player_name = strlen(player_name); + initNetworkBufferForWriting(write_buffer, OP_PLAYER_NAME, 0); + + putNetworkBufferString(write_buffer, player_name); + + SendNetworkBufferToServer(write_buffer); - buffer[1] = OP_PLAYER_NAME; - memcpy(&buffer[2], player_name, len_player_name); - SendBufferToServer(2 + len_player_name); Error(ERR_NETWORK_CLIENT, "you set your player name to \"%s\"", player_name); } -void SendToServer_ProtocolVersion() +void SendToServer_ProtocolVersion(void) { - buffer[1] = OP_PROTOCOL_VERSION; - buffer[2] = PROTOCOL_VERSION_1; - buffer[3] = PROTOCOL_VERSION_2; - buffer[4] = PROTOCOL_VERSION_3; + initNetworkBufferForWriting(write_buffer, OP_PROTOCOL_VERSION, 0); + + putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_MAJOR); + putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_MINOR); + putNetworkBuffer8BitInteger(write_buffer, PROTOCOL_VERSION_PATCH); - SendBufferToServer(5); + SendNetworkBufferToServer(write_buffer); } void SendToServer_NrWanted(int nr_wanted) { - buffer[1] = OP_NUMBER_WANTED; - buffer[2] = nr_wanted; + initNetworkBufferForWriting(write_buffer, OP_NUMBER_WANTED, 0); - SendBufferToServer(3); + putNetworkBuffer8BitInteger(write_buffer, nr_wanted); + + SendNetworkBufferToServer(write_buffer); } -void SendToServer_StartPlaying() +void SendToServer_LevelFile(void) { - unsigned long new_random_seed = InitRND(NEW_RANDOMIZE); + initNetworkBufferForWriting(write_buffer, OP_LEVEL_FILE, 0); + + putNetworkBufferString( write_buffer, leveldir_current->identifier); + putNetworkBuffer16BitInteger(write_buffer, level.file_info.nr); + putNetworkBuffer8BitInteger( write_buffer, level.file_info.type); + putNetworkBuffer8BitInteger( write_buffer, level.file_info.packed); + putNetworkBufferString( write_buffer, level.file_info.basename); + putNetworkBufferFile( write_buffer, level.file_info.filename); + putNetworkBuffer8BitInteger( write_buffer, level.use_custom_template); + + if (level.use_custom_template) + { + putNetworkBufferString(write_buffer, level_template.file_info.basename); + putNetworkBufferFile( write_buffer, level_template.file_info.filename); + } + + SendNetworkBufferToServer(write_buffer); + + setString(&network_level.leveldir_identifier, leveldir_current->identifier); + + // the sending client does not use network level files (but the real ones) + network_level.use_network_level_files = FALSE; - int dummy = 0; /* !!! HAS NO MEANING ANYMORE !!! */ - /* the name of the level must be enough */ +#if 0 + printf("::: '%s'\n", leveldir_current->identifier); + printf("::: '%d'\n", level.file_info.nr); + printf("::: '%d'\n", level.file_info.type); + printf("::: '%d'\n", level.file_info.packed); + printf("::: '%s'\n", level.file_info.basename); + printf("::: '%s'\n", level.file_info.filename); + + if (level.use_custom_template) + printf("::: '%s'\n", level_template.file_info.filename); +#endif +} - buffer[1] = OP_START_PLAYING; - buffer[2] = (byte)(level_nr >> 8); - buffer[3] = (byte)(level_nr & 0xff); - buffer[4] = (byte)(dummy >> 8); - buffer[5] = (byte)(dummy & 0xff); +void SendToServer_StartPlaying(void) +{ + unsigned int new_random_seed = InitRND(level.random_seed); - buffer[6] = (unsigned char)((new_random_seed >> 24) & 0xff); - buffer[7] = (unsigned char)((new_random_seed >> 16) & 0xff); - buffer[8] = (unsigned char)((new_random_seed >> 8) & 0xff); - buffer[9] = (unsigned char)((new_random_seed >> 0) & 0xff); + initNetworkBufferForWriting(write_buffer, OP_START_PLAYING, 0); - strcpy((char *)&buffer[10], leveldir_current->filename); + putNetworkBufferString( write_buffer, leveldir_current->identifier); + putNetworkBuffer16BitInteger(write_buffer, level_nr); + putNetworkBuffer32BitInteger(write_buffer, new_random_seed); - SendBufferToServer(10 + strlen(leveldir_current->filename) + 1); + SendNetworkBufferToServer(write_buffer); } -void SendToServer_PausePlaying() +void SendToServer_PausePlaying(void) { - buffer[1] = OP_PAUSE_PLAYING; + initNetworkBufferForWriting(write_buffer, OP_PAUSE_PLAYING, 0); - SendBufferToServer(2); + SendNetworkBufferToServer(write_buffer); } -void SendToServer_ContinuePlaying() +void SendToServer_ContinuePlaying(void) { - buffer[1] = OP_CONTINUE_PLAYING; + initNetworkBufferForWriting(write_buffer, OP_CONTINUE_PLAYING, 0); - SendBufferToServer(2); + SendNetworkBufferToServer(write_buffer); } -void SendToServer_StopPlaying() +void SendToServer_StopPlaying(int cause_for_stopping) { - buffer[1] = OP_STOP_PLAYING; + initNetworkBufferForWriting(write_buffer, OP_STOP_PLAYING, 0); + + putNetworkBuffer8BitInteger(write_buffer, cause_for_stopping); - SendBufferToServer(2); + SendNetworkBufferToServer(write_buffer); } void SendToServer_MovePlayer(byte player_action) { - buffer[1] = OP_MOVE_FIGURE; - buffer[2] = player_action; + initNetworkBufferForWriting(write_buffer, OP_MOVE_PLAYER, 0); - SendBufferToServer(3); + putNetworkBuffer8BitInteger(write_buffer, player_action); + + SendNetworkBufferToServer(write_buffer); } -static void Handle_OP_BAD_PROTOCOL_VERSION() +static void Handle_OP_BAD_PROTOCOL_VERSION(void) { + int protocol_version_major = getNetworkBuffer8BitInteger(read_buffer); + int protocol_version_minor = getNetworkBuffer8BitInteger(read_buffer); + Error(ERR_WARN, "protocol version mismatch"); - Error(ERR_EXIT, "server expects %d.%d.x instead of %d.%d.%d", - buffer[2], buffer[3], - PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3); + Error(ERR_WARN, "server expects %d.%d.x instead of %d.%d.%d", + protocol_version_major, + protocol_version_minor, + PROTOCOL_VERSION_MAJOR, + PROTOCOL_VERSION_MINOR, + PROTOCOL_VERSION_PATCH); + + sprintf(stop_network_client_message, "Network protocol version mismatch! Server expects version %d.%d.x instead of %d.%d.%d!", + protocol_version_major, + protocol_version_minor, + PROTOCOL_VERSION_MAJOR, + PROTOCOL_VERSION_MINOR, + PROTOCOL_VERSION_PATCH); + + stop_network_client = TRUE; } -static void Handle_OP_YOUR_NUMBER() +static void Handle_OP_YOUR_NUMBER(void) { - int new_client_nr = buffer[2]; + int old_client_nr = getNetworkBuffer8BitInteger(read_buffer); + int new_client_nr = getNetworkBuffer8BitInteger(read_buffer); int new_index_nr = new_client_nr - 1; struct PlayerInfo *old_local_player = local_player; struct PlayerInfo *new_local_player = &stored_player[new_index_nr]; - printf("OP_YOUR_NUMBER: %d\n", buffer[0]); + printf("OP_YOUR_NUMBER: %d\n", old_client_nr); first_player.nr = new_client_nr; 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() +static void Handle_OP_NUMBER_WANTED(void) { - int client_nr_wanted = buffer[2]; - int old_client_nr = buffer[0]; - int new_client_nr = buffer[3]; + int old_client_nr = getNetworkBuffer8BitInteger(read_buffer); + int client_nr_wanted = getNetworkBuffer8BitInteger(read_buffer); + int new_client_nr = getNetworkBuffer8BitInteger(read_buffer); int old_index_nr = old_client_nr - 1; int new_index_nr = new_client_nr - 1; int index_nr_wanted = client_nr_wanted - 1; struct PlayerInfo *old_player = &stored_player[old_index_nr]; struct PlayerInfo *new_player = &stored_player[new_index_nr]; - printf("OP_NUMBER_WANTED: %d\n", buffer[0]); + printf("OP_NUMBER_WANTED: %d\n", old_client_nr); - if (new_client_nr == client_nr_wanted) /* switching succeeded */ + if (new_client_nr == client_nr_wanted) // switching succeeded { struct NetworkClientPlayerInfo *player; - if (old_client_nr != client_nr_wanted) /* client's nr has changed */ + if (old_client_nr != client_nr_wanted) // client's nr has changed Error(ERR_NETWORK_CLIENT, "client %d switches to # %d", old_client_nr, new_client_nr); - else if (old_client_nr == first_player.nr) /* local player keeps his nr */ + else if (old_client_nr == first_player.nr) // local player keeps his nr Error(ERR_NETWORK_CLIENT, "keeping client # %d", new_client_nr); 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 */ + 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? */ + 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) +static void Handle_OP_PLAYER_NAME(void) { - struct NetworkClientPlayerInfo *player; - int player_nr = (int)buffer[0]; + int player_nr = getNetworkBuffer8BitInteger(read_buffer); + char *player_name = getNetworkBufferString(read_buffer); + struct NetworkClientPlayerInfo *player = getNetworkPlayer(player_nr); printf("OP_PLAYER_NAME: %d\n", player_nr); - player = getNetworkPlayer(player_nr); - buffer[len] = 0; + + strncpy(player->name, player_name, MAX_PLAYER_NAME_LEN); + player->name[MAX_PLAYER_NAME_LEN] = '\0'; + Error(ERR_NETWORK_CLIENT, "client %d calls itself \"%s\"", - buffer[0], &buffer[2]); - strncpy(player->name, (char *)&buffer[2], MAX_PLAYER_NAME_LEN); + player_nr, player->name); } -static void Handle_OP_PLAYER_CONNECTED() +static void Handle_OP_PLAYER_CONNECTED(void) { struct NetworkClientPlayerInfo *player, *last_player = NULL; - int new_client_nr = (int)buffer[0]; + int new_client_nr = getNetworkBuffer8BitInteger(read_buffer); int new_index_nr = new_client_nr - 1; 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"); @@ -394,229 +652,439 @@ 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() +static void Handle_OP_PLAYER_DISCONNECTED(void) { struct NetworkClientPlayerInfo *player, *player_disconnected; - int player_nr = (int)buffer[0]; + int player_nr = getNetworkBuffer8BitInteger(read_buffer); + 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])); + player_nr, getNetworkPlayerName(player_nr)); - 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() +static void Handle_OP_START_PLAYING(void) { - struct LevelDirInfo *new_leveldir; - int new_level_nr; - int dummy; /* !!! HAS NO MEANING ANYMORE !!! */ - unsigned long new_random_seed; - char *new_leveldir_filename; - - 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]; + int player_nr = getNetworkBuffer8BitInteger(read_buffer); + char *new_leveldir_identifier = getNetworkBufferString(read_buffer); + int new_level_nr = getNetworkBuffer16BitInteger(read_buffer); + unsigned int new_random_seed = getNetworkBuffer32BitInteger(read_buffer); - new_leveldir = getLevelDirInfoFromFilename(new_leveldir_filename); - if (new_leveldir == NULL) + if (!strEqual(new_leveldir_identifier, network_level.leveldir_identifier)) { - 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]); + printf("OP_START_PLAYING: %d\n", player_nr); 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", + player_nr, new_level_nr, new_leveldir_identifier); - leveldir_current = new_leveldir; - level_nr = new_level_nr; + LevelDirTree *new_leveldir = + getTreeInfoFromIdentifier(leveldir_first, new_leveldir_identifier); - TapeErase(); - LoadTape(level_nr); - LoadLevel(level_nr); + if (new_leveldir != NULL) + { + leveldir_current = new_leveldir; + level_nr = new_level_nr; + } - if (setup.autorecord) - TapeStartRecording(); + // needed if level set of network game changed graphics, sounds or music + ReloadCustomArtwork(0); - if (tape.recording) - tape.random_seed = new_random_seed; + TapeErase(); - InitRND(new_random_seed); + if (network_level.use_network_level_files) + LoadNetworkLevel(&network_level); + else + LoadLevel(level_nr); - game_status = PLAYING; - InitGame(); + StartGameActions(FALSE, setup.autorecord, new_random_seed); } -static void Handle_OP_PAUSE_PLAYING() +static void Handle_OP_PAUSE_PLAYING(void) { - printf("OP_PAUSE_PLAYING: %d\n", buffer[0]); - Error(ERR_NETWORK_CLIENT, "client %d pauses game", buffer[0]); + int player_nr = getNetworkBuffer8BitInteger(read_buffer); - tape.pausing = TRUE; - DrawVideoDisplay(VIDEO_STATE_PAUSE_ON,0); + printf("OP_PAUSE_PLAYING: %d\n", player_nr); + Error(ERR_NETWORK_CLIENT, "client %d pauses game", player_nr); + + if (game_status == GAME_MODE_PLAYING) + { + tape.pausing = TRUE; + DrawVideoDisplay(VIDEO_STATE_PAUSE_ON, 0); + } } -static void Handle_OP_CONTINUE_PLAYING() +static void Handle_OP_CONTINUE_PLAYING(void) { - printf("OP_CONTINUE_PLAYING: %d\n", buffer[0]); - Error(ERR_NETWORK_CLIENT, "client %d continues game", buffer[0]); + int player_nr = getNetworkBuffer8BitInteger(read_buffer); + + printf("OP_CONTINUE_PLAYING: %d\n", player_nr); + Error(ERR_NETWORK_CLIENT, "client %d continues game", player_nr); - 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() +static void Handle_OP_STOP_PLAYING(void) { - printf("OP_STOP_PLAYING: %d\n", buffer[0]); - Error(ERR_NETWORK_CLIENT, "client %d stops game", buffer[0]); + int client_nr = getNetworkBuffer8BitInteger(read_buffer); + int cause_for_stopping = getNetworkBuffer8BitInteger(read_buffer); - game_status = MAINMENU; - DrawMainMenu(); + printf("OP_STOP_PLAYING: %d [%d]\n", client_nr, cause_for_stopping); + Error(ERR_NETWORK_CLIENT, "client %d stops game [%d]", + client_nr, cause_for_stopping); + + if (game_status == GAME_MODE_PLAYING) + { + 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]; + + if (cause_for_stopping == NETWORK_STOP_BY_PLAYER) + sprintf(message, "Network game stopped by player %d!", client_nr); + else + sprintf(message, (cause_for_stopping == NETWORK_STOP_BY_ERROR ? + "Network game stopped due to internal error!" : + "Network game stopped!")); + + if (cause_for_stopping != NETWORK_STOP_BY_PLAYER || + stopped_by_remote_player) + Request(message, REQ_CONFIRM | REQ_STAY_CLOSED); + + SetGameStatus(GAME_MODE_MAIN); + + DrawMainMenu(); + } } -static void Handle_OP_MOVE_FIGURE(unsigned int len) +static void Handle_OP_MOVE_PLAYER(void) { - int server_frame_counter; + int player_nr = getNetworkBuffer8BitInteger(read_buffer); + int server_frame_counter = getNetworkBuffer32BitInteger(read_buffer); int i; if (!network_playing) return; - server_frame_counter = - (buffer[2] << 24) | (buffer[3] << 16) | (buffer[4] << 8) | (buffer[5]); - 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, "frame counters of client %d and server out of sync", + player_nr); + 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; inr = getNetworkBuffer16BitInteger(read_buffer); + file_info->type = getNetworkBuffer8BitInteger(read_buffer); + file_info->packed = getNetworkBuffer8BitInteger(read_buffer); + file_info->basename = getStringCopy(getNetworkBufferString(read_buffer)); + file_info->filename = getPath2(network_level_dir, file_info->basename); + + if (hasPathSeparator(file_info->basename)) + Error(ERR_EXIT, "protocol error: invalid filename from network client"); + + getNetworkBufferFile(read_buffer, file_info->filename); - while (nread >= 4 && nread >= 4 + readbuffer[3]) + use_custom_template = getNetworkBuffer8BitInteger(read_buffer); + if (use_custom_template) { - message_length = readbuffer[3]; - if (readbuffer[0] || readbuffer[1] || readbuffer[2]) - Error(ERR_EXIT, "wrong network server line length"); + *tmpl_info = *file_info; - memcpy(buffer, &readbuffer[4], message_length); - nread -= 4 + message_length; - memmove(readbuffer, readbuffer + 4 + message_length, nread); + tmpl_info->basename = getStringCopy(getNetworkBufferString(read_buffer)); + tmpl_info->filename = getPath2(network_level_dir, tmpl_info->basename); - switch(buffer[1]) - { - case OP_BAD_PROTOCOL_VERSION: - Handle_OP_BAD_PROTOCOL_VERSION(); - break; + if (hasPathSeparator(tmpl_info->basename)) + Error(ERR_EXIT, "protocol error: invalid filename from network client"); - case OP_YOUR_NUMBER: - Handle_OP_YOUR_NUMBER(); - break; + getNetworkBufferFile(read_buffer, tmpl_info->filename); + } - case OP_NUMBER_WANTED: - Handle_OP_NUMBER_WANTED(); - break; + network_level.leveldir_identifier = leveldir_identifier; + network_level.use_custom_template = use_custom_template; - case OP_PLAYER_NAME: - Handle_OP_PLAYER_NAME(message_length); - break; + // the receiving client(s) use(s) the transferred network level files + network_level.use_network_level_files = TRUE; - case OP_PLAYER_CONNECTED: - Handle_OP_PLAYER_CONNECTED(); - break; - - case OP_PLAYER_DISCONNECTED: - Handle_OP_PLAYER_DISCONNECTED(); - break; +#if 0 + printf("::: '%s'\n", leveldir_identifier); + printf("::: '%d'\n", file_info->nr); + printf("::: '%d'\n", file_info->type); + printf("::: '%d'\n", file_info->packed); + printf("::: '%s'\n", file_info->basename); + printf("::: '%s'\n", file_info->filename); + + if (use_custom_template) + printf("::: '%s'\n", tmpl_info->filename); +#endif +} - case OP_START_PLAYING: - Handle_OP_START_PLAYING(); - break; +static void HandleNetworkingMessage(void) +{ + stop_network_game = FALSE; - case OP_PAUSE_PLAYING: - Handle_OP_PAUSE_PLAYING(); - break; + initNetworkBufferForReading(read_buffer); - case OP_CONTINUE_PLAYING: - Handle_OP_CONTINUE_PLAYING(); - break; + int message_type = getNetworkBuffer8BitInteger(read_buffer); - case OP_STOP_PLAYING: - Handle_OP_STOP_PLAYING(); - break; + switch (message_type) + { + case OP_BAD_PROTOCOL_VERSION: + Handle_OP_BAD_PROTOCOL_VERSION(); + break; - case OP_MOVE_FIGURE: - Handle_OP_MOVE_FIGURE(message_length); - break; + case OP_YOUR_NUMBER: + Handle_OP_YOUR_NUMBER(); + break; - case OP_BROADCAST_MESSAGE: - printf("OP_BROADCAST_MESSAGE: %d\n", buffer[0]); - Error(ERR_NETWORK_CLIENT, "client %d sends message", buffer[0]); - break; - } + case OP_NUMBER_WANTED: + Handle_OP_NUMBER_WANTED(); + break; + + case OP_PLAYER_NAME: + Handle_OP_PLAYER_NAME(); + break; + + case OP_PLAYER_CONNECTED: + Handle_OP_PLAYER_CONNECTED(); + break; + + case OP_PLAYER_DISCONNECTED: + Handle_OP_PLAYER_DISCONNECTED(); + break; + + case OP_START_PLAYING: + Handle_OP_START_PLAYING(); + break; + + case OP_PAUSE_PLAYING: + Handle_OP_PAUSE_PLAYING(); + break; + + case OP_CONTINUE_PLAYING: + Handle_OP_CONTINUE_PLAYING(); + break; + + case OP_STOP_PLAYING: + Handle_OP_STOP_PLAYING(); + break; + + case OP_MOVE_PLAYER: + Handle_OP_MOVE_PLAYER(); + break; + + case OP_BROADCAST_MESSAGE: + Handle_OP_BROADCAST_MESSAGE(); + break; + + case OP_LEVEL_FILE: + Handle_OP_LEVEL_FILE(); + break; + + default: + if (options.verbose) + Error(ERR_NETWORK_CLIENT, + "unknown opcode %d from server", message_type); } 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(void) { - static struct timeval tv = { 0, 0 }; - fd_set rfds; - int r = 0; + while (1) + { + // ---------- check network server for activity ---------- - FD_ZERO(&rfds); - FD_SET(sfd, &rfds); + int num_active_sockets = SDLNet_CheckSockets(rfds, 0); - r = select(sfd + 1, &rfds, NULL, NULL, &tv); + if (num_active_sockets < 0) + return "Error checking network sockets!"; - if (r < 0 && errno != EINTR) - Error(ERR_EXIT, "HandleNetworking(): select() failed"); + if (num_active_sockets == 0) + break; // no active sockets, stop here - if (r < 0) - FD_ZERO(&rfds); + // ---------- read packets from network server ---------- - if (FD_ISSET(sfd, &rfds)) - { - int r; + initNetworkBufferForReceiving(read_buffer); - r = read(sfd, readbuffer + nread, MAX_BUFFER_SIZE - nread); + int num_bytes = receiveNetworkBufferPacket(read_buffer, sfd); - 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; + HandleNetworkingMessage(); - HandleNetworkingMessages(); + if (stop_network_client) + return stop_network_client_message; } + + return NULL; } -#endif /* PLATFORM_UNIX */ +static void FreeNetworkClientPlayerInfo(struct NetworkClientPlayerInfo *player) +{ + if (player == NULL) + return; + + if (player->next) + FreeNetworkClientPlayerInfo(player->next); + + checked_free(player); +} + +static void HandleNetworkingDisconnect(void) +{ + 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(void) +{ + // do not handle any networking packets if request dialog is active + if (game.request_active) + return; + + 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(); + } + } +} + +void DisconnectFromNetworkServer(void) +{ + DrawNetworkText_Title("Terminating Network"); + DrawNetworkText("Disconnecting from network server ..."); + + HandleNetworkingDisconnect(); + + DrawNetworkText_Success("Successfully disconnected!"); +}