X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Fnetwork.c;h=2730c7b01967842e533a1e2a5b26df25323e93b1;hb=c40a5c6109e586ce4049ca0900e5fb9c9ac60fb7;hp=033bed0d7c47115f978b9711ca50b53b92945c15;hpb=3abeab753b05c534b4061ad20a1de50a39da6daa;p=rocksndiamonds.git diff --git a/src/network.c b/src/network.c index 033bed0d..2730c7b0 100644 --- a/src/network.c +++ b/src/network.c @@ -1,377 +1,1093 @@ -/*********************************************************** -* 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 -#include -#include +// ============================================================================ +// 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 -#include -#include + +#include "libgame/libgame.h" #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" -int norestart = 0; -int nospeedup = 0; - -#define DEFAULTPORT 19503 - -#define PROT_VERS_1 1 -#define PROT_VERS_2 0 -#define PROT_VERS_3 1 - -#define OP_NICK 1 -#define OP_PLAY 2 -#define OP_FALL 3 -#define OP_DRAW 4 -#define OP_LOST 5 -#define OP_GONE 6 -#define OP_CLEAR 7 -#define OP_NEW 8 -#define OP_LINES 9 -#define OP_GROW 10 -#define OP_MODE 11 -#define OP_LEVEL 12 -#define OP_BOT 13 -#define OP_KILL 14 -#define OP_PAUSE 15 -#define OP_CONT 16 -#define OP_VERSION 17 -#define OP_BADVERS 18 -#define OP_MSG 19 -#define OP_YOUARE 20 -#define OP_LINESTO 21 -#define OP_WON 22 -#define OP_ZERO 23 - -/* server stuff */ - -#define BUFLEN 4096 - -int sfd; -unsigned char realbuf[512], readbuf[BUFLEN], writbuf[BUFLEN]; -unsigned char *buf = realbuf + 4; -int nread = 0, nwrite = 0; - -/* like memcpy, but guaranteed to handle overlap when s <= t */ -void copydown(char *s, char *t, int n) -{ - for (; n; n--) - *(s++) = *(t++); -} - -void sysmsg(char *s) -{ - printf("** %s\n", s); - fflush(stdout); +struct NetworkClientPlayerInfo +{ + byte nr; + char name[MAX_PLAYER_NAME_LEN + 1]; + struct NetworkClientPlayerInfo *next; +}; + +static struct NetworkClientPlayerInfo first_player = +{ + 0, + EMPTY_PLAYER_NAME, + NULL +}; + +// server stuff + +static TCPsocket sfd; // TCP server socket +static UDPsocket udp; // UDP server socket +static SDLNet_SocketSet rfds; // socket set + +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) +{ + 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 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); } -void fatal(char *s) +static struct NetworkClientPlayerInfo *getNetworkPlayer(int player_nr) { - fprintf(stderr, "%s.\n", s); - exit(1); + struct NetworkClientPlayerInfo *player = NULL; + + for (player = &first_player; player; player = player->next) + if (player->nr == player_nr) + break; + + if (player == NULL) // should not happen + Error(ERR_EXIT, "protocol error: reference to non-existing player %d", + player_nr); + + return player; } -void u_sleep(int i) +char *getNetworkPlayerName(int player_nr) { - struct timeval tm; - tm.tv_sec = i / 1000000; - tm.tv_usec = i % 1000000; - select(0, NULL, NULL, NULL, &tm); + struct NetworkClientPlayerInfo *player; + + if (player_nr == 0) + return("the network game server"); + else if (player_nr == first_player.nr) + return("you"); + else + for (player = &first_player; player; player = player->next) + if (player->nr == player_nr && strlen(player->name) > 0) + return(player->name); + + return(EMPTY_PLAYER_NAME); +} + +boolean hasStartedNetworkGame(void) +{ + return !network_level.use_network_level_files; } -void flushbuf() +static boolean hasPathSeparator(char *s) { - if (nwrite) + return (strchr(s, '/') != NULL); +} + +static void StartNetworkServer(int port) +{ + 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; + + 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) + { + char message[100]; + + SDLNet_ResolveHost(&ip, hostname, port); + + if (ip.host == INADDR_NONE) + { + sprintf(message, "Failed to resolve network server hostname '%s'!", + hostname); + + DrawNetworkText_Failed(message); + + return FALSE; + } + else + { + server_host = SDLNet_Read32(&ip.host); + } + + sprintf(message, "Connecting to network server host %s ...", hostname); + + DrawNetworkText(message); + } + else + { + // 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 + + DrawNetworkText("Looking for local network server ..."); + } + else + { + DrawNetworkText("Connecting to network server ..."); + } + + SDLNet_Write32(server_host, &ip.host); + SDLNet_Write16(port, &ip.port); + } + + 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 { - write(sfd, writbuf, nwrite); - nwrite = 0; + 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 + return FALSE; + + DrawNetworkText("Starting new local network server ..."); + + StartNetworkServer(port); + + // wait for server to start up and try connecting several times + for (i = 0; i < 30; i++) + { + if ((sfd = SDLNet_TCP_Open(&ip))) // connected + { + DrawNetworkText_Success("Successfully connected to newly started network server!"); + + SDLNet_TCP_AddSocket(rfds, sfd); + + return TRUE; + } + + Delay_WithScreenUpdates(100); } + + DrawNetworkText_Failed("Failed to connect to newly started network server!"); + + // when reaching this point, connect to newly started server has failed + return FALSE; } -void sendbuf(int len) +void SendToServer_PlayerName(char *player_name) { - if (!standalone) + initNetworkBufferForWriting(write_buffer, OP_PLAYER_NAME, 0); + + putNetworkBufferString(write_buffer, player_name); + + SendNetworkBufferToServer(write_buffer); + + Error(ERR_NETWORK_CLIENT, "you set your player name to \"%s\"", player_name); +} + +void SendToServer_ProtocolVersion(void) +{ + 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); + + SendNetworkBufferToServer(write_buffer); +} + +void SendToServer_NrWanted(int nr_wanted) +{ + initNetworkBufferForWriting(write_buffer, OP_NUMBER_WANTED, 0); + + putNetworkBuffer8BitInteger(write_buffer, nr_wanted); + + SendNetworkBufferToServer(write_buffer); +} + +void SendToServer_LevelFile(void) +{ + 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) { - realbuf[0] = realbuf[1] = realbuf[2] = 0; - realbuf[3] = (unsigned char)len; - buf[0] = 0; - if (nwrite + 4 + len >= BUFLEN) - fatal("Internal error: send buffer overflow"); - memcpy(writbuf + nwrite, realbuf, 4 + len); - nwrite += 4 + len; + 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; + +#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 +} + +void SendToServer_StartPlaying(void) +{ + unsigned int new_random_seed = InitRND(level.random_seed); + + initNetworkBufferForWriting(write_buffer, OP_START_PLAYING, 0); + + putNetworkBufferString( write_buffer, leveldir_current->identifier); + putNetworkBuffer16BitInteger(write_buffer, level_nr); + putNetworkBuffer32BitInteger(write_buffer, new_random_seed); + + SendNetworkBufferToServer(write_buffer); +} + +void SendToServer_PausePlaying(void) +{ + initNetworkBufferForWriting(write_buffer, OP_PAUSE_PLAYING, 0); + + SendNetworkBufferToServer(write_buffer); +} + +void SendToServer_ContinuePlaying(void) +{ + initNetworkBufferForWriting(write_buffer, OP_CONTINUE_PLAYING, 0); + + SendNetworkBufferToServer(write_buffer); +} + +void SendToServer_StopPlaying(int cause_for_stopping) +{ + initNetworkBufferForWriting(write_buffer, OP_STOP_PLAYING, 0); + + putNetworkBuffer8BitInteger(write_buffer, cause_for_stopping); + + SendNetworkBufferToServer(write_buffer); +} + +void SendToServer_MovePlayer(byte player_action) +{ + initNetworkBufferForWriting(write_buffer, OP_MOVE_PLAYER, 0); + + putNetworkBuffer8BitInteger(write_buffer, player_action); + + SendNetworkBufferToServer(write_buffer); +} + +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_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; } -void startserver() +static void Handle_OP_YOUR_NUMBER(void) { - char *options[2]; - int n = 0; + 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]; - options[0] = options[1] = NULL; - if (norestart) - options[n++] = "-norestart"; - if (nospeedup) - options[n++] = "-nospeedup"; + printf("OP_YOUR_NUMBER: %d\n", old_client_nr); + first_player.nr = new_client_nr; - switch (fork()) + if (old_local_player != new_local_player) { - case 0: - execlp( -#ifdef XTRISPATH - XTRISPATH "/rnd_server", -#else - "rnd_server", -#endif - "rnd_server", "-once", "-v", options[0], options[1], NULL); + // set relevant player settings and change to new player - fprintf(stderr, "Can't start server '%s'.\n", -#ifdef XTRISPATH - XTRISPATH "/rnd_server" -#else - "rnd_server" -#endif - ); + local_player = new_local_player; - _exit(1); - - case -1: - fatal("fork() failed"); - - default: - return; + 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; } -BOOL ConnectToServer(char *host, int port) +static void Handle_OP_NUMBER_WANTED(void) { - struct hostent *hp; - struct sockaddr_in s; - struct protoent *tcpproto; - int on = 1, i; + 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]; - if (host) + printf("OP_NUMBER_WANTED: %d\n", old_client_nr); + + if (new_client_nr == client_nr_wanted) // switching succeeded { - if ((s.sin_addr.s_addr = inet_addr(host)) == -1) + struct NetworkClientPlayerInfo *player; + + 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 + Error(ERR_NETWORK_CLIENT, "keeping client # %d", new_client_nr); + + if (old_client_nr != new_client_nr) { - hp = gethostbyname(host); - if (!hp) - fatal("Host not found"); - s.sin_addr = *(struct in_addr *)(hp->h_addr_list[0]); + // set relevant player settings and change to new player + + 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 request[100]; + + 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(void) +{ + 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); + + 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\"", + player_nr, player->name); +} + +static void Handle_OP_PLAYER_CONNECTED(void) +{ + struct NetworkClientPlayerInfo *player, *last_player = NULL; + 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) + { + if (player->nr == new_client_nr) + Error(ERR_EXIT, "multiplayer server sent duplicate player id"); + + last_player = player; + } + + last_player->next = player = + checked_malloc(sizeof(struct NetworkClientPlayerInfo)); + player->nr = new_client_nr; + player->name[0] = '\0'; + player->next = NULL; + + stored_player[new_index_nr].connected_network = TRUE; +} + +static void Handle_OP_PLAYER_DISCONNECTED(void) +{ + struct NetworkClientPlayerInfo *player, *player_disconnected; + 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(player_nr)); + + 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(void) +{ + 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); + + if (!strEqual(new_leveldir_identifier, network_level.leveldir_identifier)) + { + Error(ERR_WARN, "no such level identifier: '%s'", new_leveldir_identifier); + + stop_network_game = TRUE; + + return; + } + + printf("OP_START_PLAYING: %d\n", player_nr); + Error(ERR_NETWORK_CLIENT, + "client %d starts game [level %d from level identifier '%s']\n", + player_nr, new_level_nr, new_leveldir_identifier); + + LevelDirTree *new_leveldir = + getTreeInfoFromIdentifier(leveldir_first, new_leveldir_identifier); + + if (new_leveldir != NULL) + { + leveldir_current = new_leveldir; + level_nr = new_level_nr; + } + + // needed if level set of network game changed graphics, sounds or music + ReloadCustomArtwork(0); + + TapeErase(); + + if (network_level.use_network_level_files) + LoadNetworkLevel(&network_level); else - s.sin_addr.s_addr = inet_addr("127.0.0.1"); + LoadLevel(level_nr); - if (port == 0) - port = DEFAULTPORT; + StartGameActions(FALSE, setup.autorecord, new_random_seed); +} - s.sin_port = htons(port); - s.sin_family = AF_INET; - sfd = socket(PF_INET, SOCK_STREAM, 0); - if (sfd < 0) - fatal("Out of file descriptors"); - if ((tcpproto = getprotobyname("tcp")) != NULL) - setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int)); +static void Handle_OP_PAUSE_PLAYING(void) +{ + int player_nr = getNetworkBuffer8BitInteger(read_buffer); - if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) < 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) { - if (!host) - { - printf("No rocksndiamonds server on localhost - starting up one ...\n"); - startserver(); - for (i=0; i<6; i++) - { - u_sleep(500000); - close(sfd); - sfd = socket(PF_INET, SOCK_STREAM, 0); - if (sfd < 0) - fatal("Out of file descriptors"); - setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int)); - if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0) - break; - } - if (i==6) - fatal("Can't connect to server"); - } + tape.pausing = TRUE; + DrawVideoDisplay(VIDEO_STATE_PAUSE_ON, 0); + } +} + +static void Handle_OP_CONTINUE_PLAYING(void) +{ + int player_nr = getNetworkBuffer8BitInteger(read_buffer); + + printf("OP_CONTINUE_PLAYING: %d\n", player_nr); + Error(ERR_NETWORK_CLIENT, "client %d continues game", player_nr); + + if (game_status == GAME_MODE_PLAYING) + { + tape.pausing = FALSE; + DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF, 0); + } +} + +static void Handle_OP_STOP_PLAYING(void) +{ + int client_nr = getNetworkBuffer8BitInteger(read_buffer); + int cause_for_stopping = getNetworkBuffer8BitInteger(read_buffer); + + 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 - fatal("Can't connect to server"); + 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_PLAYER(void) +{ + int player_nr = getNetworkBuffer8BitInteger(read_buffer); + int server_frame_counter = getNetworkBuffer32BitInteger(read_buffer); + int i; + + if (!network_playing) + return; + + if (server_frame_counter != FrameCounter) + { + 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(TRUE); + return; + } + + // copy valid player actions (will be set to 0 for not connected players) + for (i = 0; i < MAX_PLAYERS; i++) + stored_player[i].effective_action = + getNetworkBuffer8BitInteger(read_buffer); + + network_player_action_received = TRUE; } -void SendNicknameToServer(char *nickname) +static void Handle_OP_BROADCAST_MESSAGE(void) { - static char msgbuf[300]; + int player_nr = getNetworkBuffer8BitInteger(read_buffer); - buf[1] = OP_NICK; - memcpy(&buf[2], nickname, strlen(nickname)); - sendbuf(2 + strlen(nickname)); - sprintf(msgbuf, "you set your nick to \"%s\"", nickname); - sysmsg(msgbuf); + printf("OP_BROADCAST_MESSAGE: %d\n", player_nr); + Error(ERR_NETWORK_CLIENT, "client %d sends message", player_nr); } -void SendProtocolVersionToServer() +static void Handle_OP_LEVEL_FILE(void) { - buf[1] = OP_VERSION; - buf[2] = PROT_VERS_1; - buf[3] = PROT_VERS_2; - buf[4] = PROT_VERS_3; - sendbuf(5); + int player_nr = getNetworkBuffer8BitInteger(read_buffer); + char *leveldir_identifier; + char *network_level_dir; + struct LevelFileInfo *file_info = &network_level.file_info; + struct LevelFileInfo *tmpl_info = &network_level.tmpl_info; + boolean use_custom_template; + + setString(&network_level.leveldir_identifier, NULL); + setString(&network_level.file_info.basename, NULL); + setString(&network_level.file_info.filename, NULL); + setString(&network_level.tmpl_info.basename, NULL); + setString(&network_level.tmpl_info.filename, NULL); + + printf("OP_LEVEL_FILE: %d\n", player_nr); + + leveldir_identifier = getStringCopy(getNetworkBufferString(read_buffer)); + + if (hasPathSeparator(leveldir_identifier)) + Error(ERR_EXIT, "protocol error: invalid filename from network client"); + + InitNetworkLevelDirectory(leveldir_identifier); + + network_level_dir = getNetworkLevelDir(leveldir_identifier); + + file_info->nr = 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); + + use_custom_template = getNetworkBuffer8BitInteger(read_buffer); + if (use_custom_template) + { + *tmpl_info = *file_info; + + tmpl_info->basename = getStringCopy(getNetworkBufferString(read_buffer)); + tmpl_info->filename = getPath2(network_level_dir, tmpl_info->basename); + + if (hasPathSeparator(tmpl_info->basename)) + Error(ERR_EXIT, "protocol error: invalid filename from network client"); + + getNetworkBufferFile(read_buffer, tmpl_info->filename); + } + + network_level.leveldir_identifier = leveldir_identifier; + network_level.use_custom_template = use_custom_template; + + // the receiving client(s) use(s) the transferred network level files + network_level.use_network_level_files = TRUE; + +#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 } -void handlemessages() +static void HandleNetworkingMessage(void) { - unsigned int len; - static char msgbuf[300]; + stop_network_game = FALSE; + + initNetworkBufferForReading(read_buffer); - while (nread >= 4 && nread >= 4 + readbuf[3]) + int message_type = getNetworkBuffer8BitInteger(read_buffer); + + switch (message_type) { - len = readbuf[3]; - if (readbuf[0] || readbuf[1] || readbuf[2]) - fatal("Wrong server line length"); + case OP_BAD_PROTOCOL_VERSION: + Handle_OP_BAD_PROTOCOL_VERSION(); + break; - memcpy(buf, &readbuf[4], len); - nread -= 4 + len; - copydown(readbuf, readbuf + 4 + len, nread); + case OP_YOUR_NUMBER: + Handle_OP_YOUR_NUMBER(); + break; - switch(buf[1]) - { - case OP_YOUARE: - printf("OP_YOUARE: %d\n", buf[0]); - break; + case OP_NUMBER_WANTED: + Handle_OP_NUMBER_WANTED(); + break; - case OP_NEW: - printf("OP_NEW: %d\n", buf[0]); - sprintf(msgbuf, "new client %d connected", buf[0]); - sysmsg(msgbuf); - break; - - case OP_GONE: - printf("OP_GONE: %d\n", buf[0]); - sprintf(msgbuf, "client %d disconnected", buf[0]); - sysmsg(msgbuf); - break; + case OP_PLAYER_NAME: + Handle_OP_PLAYER_NAME(); + break; - case OP_BADVERS: - { - static char tmpbuf[128]; + case OP_PLAYER_CONNECTED: + Handle_OP_PLAYER_CONNECTED(); + break; - sprintf(tmpbuf, "Protocol version mismatch: server expects %d.%d.x instead of %d.%d.%d\n", buf[2], buf[3], PROT_VERS_1, PROT_VERS_2, PROT_VERS_3); - fatal(tmpbuf); - } - break; - - case OP_PLAY: - printf("OP_PLAY: %d\n", buf[0]); - sprintf(msgbuf, "client %d starts game", buf[0]); - sysmsg(msgbuf); - break; + case OP_PLAYER_DISCONNECTED: + Handle_OP_PLAYER_DISCONNECTED(); + break; - case OP_PAUSE: - printf("OP_PAUSE: %d\n", buf[0]); - sprintf(msgbuf, "client %d pauses game", buf[0]); - sysmsg(msgbuf); - break; + case OP_START_PLAYING: + Handle_OP_START_PLAYING(); + break; - case OP_CONT: - printf("OP_CONT: %d\n", buf[0]); - sprintf(msgbuf, "client %d continues game", buf[0]); - sysmsg(msgbuf); - break; + case OP_PAUSE_PLAYING: + Handle_OP_PAUSE_PLAYING(); + break; - case OP_WON: - printf("OP_WON: %d\n", buf[0]); - sprintf(msgbuf, "client %d wins the game", buf[0]); - sysmsg(msgbuf); - break; + case OP_CONTINUE_PLAYING: + Handle_OP_CONTINUE_PLAYING(); + break; - case OP_ZERO: - printf("OP_ZERO: %d\n", buf[0]); - sprintf(msgbuf, "client %d resets game counters", buf[0]); - sysmsg(msgbuf); - break; + case OP_STOP_PLAYING: + Handle_OP_STOP_PLAYING(); + break; - case OP_NICK: - printf("OP_NICK: %d\n", buf[0]); - sprintf(msgbuf, "client %d calls itself \"%s\"", buf[0], &buf[2]); - sysmsg(msgbuf); - break; + case OP_MOVE_PLAYER: + Handle_OP_MOVE_PLAYER(); + break; - case OP_MSG: - printf("OP_MSG: %d\n", buf[0]); - sprintf(msgbuf, "client %d sends message", buf[0]); - break; - - case OP_LOST: - printf("OP_MSG: %d\n", buf[0]); - sprintf(msgbuf, "client %d has lost", buf[0]); - break; - - case OP_LEVEL: - printf("OP_MSG: %d\n", buf[0]); - sprintf(msgbuf, "client %d sets level to %d", buf[0], buf[2]); - 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 ---------- - if (standalone) - return; + int num_active_sockets = SDLNet_CheckSockets(rfds, 0); - flushbuf(); + if (num_active_sockets < 0) + return "Error checking network sockets!"; - FD_ZERO(&rfds); - FD_SET(sfd, &rfds); + if (num_active_sockets == 0) + break; // no active sockets, stop here - r = select(sfd + 1, &rfds, NULL, NULL, &tv); + // ---------- read packets from network server ---------- - if (r < 0 && errno != EINTR) - { - perror("select"); - fatal("fatal: select() failed"); + initNetworkBufferForReceiving(read_buffer); + + int num_bytes = receiveNetworkBufferPacket(read_buffer, sfd); + + if (num_bytes < 0) + return "Error reading from network server!"; + + if (num_bytes == 0) + return "Connection to network server lost!"; + + HandleNetworkingMessage(); + + if (stop_network_client) + return stop_network_client_message; } - if (r < 0) - FD_ZERO(&rfds); + return NULL; +} + +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; - if (FD_ISSET(sfd, &rfds)) + char *error_message = HandleNetworkingPackets(); + + if (error_message != NULL) { - int r; + HandleNetworkingDisconnect(); + + if (game_status == GAME_MODE_PLAYING) + { + Request(error_message, REQ_CONFIRM | REQ_STAY_CLOSED); - r = read(sfd, readbuf + nread, BUFLEN - nread); + SetGameStatus(GAME_MODE_MAIN); - if (r < 0) - fatal("Error reading from server"); - if (r == 0) - fatal("Connection to server lost"); - nread += r; + DrawMainMenu(); + } + else + { + Request(error_message, REQ_CONFIRM); - handlemessages(); + if (game_status == GAME_MODE_MAIN) + ClearNetworkPlayers(); + } } } + +void DisconnectFromNetworkServer(void) +{ + DrawNetworkText_Title("Terminating Network"); + DrawNetworkText("Disconnecting from network server ..."); + + HandleNetworkingDisconnect(); + + DrawNetworkText_Success("Successfully disconnected!"); +}