X-Git-Url: https://git.artsoft.org/?p=rocksndiamonds.git;a=blobdiff_plain;f=src%2Fnetwork.c;h=6c1f4c6de4d1bd5d91674188fed45a725eb845cb;hp=890f405f91662423040114fc731f1db90c322af7;hb=98d421667c21a07ab69dd881f1435c2f595ddd4c;hpb=49dab46aa55cb43233c7f9a310593f8bd8debc29 diff --git a/src/network.c b/src/network.c index 890f405f..6c1f4c6d 100644 --- a/src/network.c +++ b/src/network.c @@ -1,722 +1,1090 @@ -/*********************************************************** -* 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 "buttons.h" #include "screens.h" -#include "misc.h" - -#define MAXNICKLEN 14 +#include "init.h" -struct user +struct NetworkClientPlayerInfo { byte nr; - char name[MAXNICKLEN+2]; - struct user *next; + char name[MAX_PLAYER_NAME_LEN + 1]; + struct NetworkClientPlayerInfo *next; }; -struct user me = +static struct NetworkClientPlayerInfo first_player = { 0, - "no name", + EMPTY_PLAYER_NAME, NULL }; -static char msgbuf[300]; +// 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; -/* server stuff */ +static boolean stop_network_game = FALSE; +static boolean stop_network_client = FALSE; +static char stop_network_client_message[MAX_OUTPUT_LINESIZE + 1]; -int sfd; -unsigned char realbuf[512], readbuf[MAX_BUFFER_SIZE], writbuf[MAX_BUFFER_SIZE]; -unsigned char *buf = realbuf + 4; -int nread = 0, nwrite = 0; +static struct NetworkLevelInfo network_level; -static void sysmsg(char *s) +static void DrawNetworkTextExt(char *message, int font_nr, boolean initialize) { - if (options.verbose) + 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 { - printf("** %s\n", s); - fflush(stdout); + 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 u_sleep(int i) +static void DrawNetworkText(char *message) { - struct timeval tm; - tm.tv_sec = i / 1000000; - tm.tv_usec = i % 1000000; - select(0, NULL, NULL, NULL, &tm); + DrawNetworkTextExt(message, FC_YELLOW, FALSE); } -static void flushbuf() +static void DrawNetworkText_Success(char *message) { - if (nwrite) - { - write(sfd, writbuf, nwrite); - nwrite = 0; - } + DrawNetworkTextExt(message, FC_GREEN, FALSE); } -static void sendbuf(int len) +static void DrawNetworkText_Failed(char *message) { - if (options.network) - { - realbuf[0] = realbuf[1] = realbuf[2] = 0; - realbuf[3] = (unsigned char)len; - buf[0] = 0; - if (nwrite + 4 + len >= MAX_BUFFER_SIZE) - Error(ERR_EXIT, "internal error: network send buffer overflow"); - memcpy(writbuf + nwrite, realbuf, 4 + len); - nwrite += 4 + len; + DrawNetworkTextExt(message, FC_RED, FALSE); +} +static void DrawNetworkText_Title(char *message) +{ + DrawNetworkTextExt(message, FC_GREEN, TRUE); +} - flushbuf(); +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); } -struct user *finduser(unsigned char c) +static struct NetworkClientPlayerInfo *getNetworkPlayer(int player_nr) { - struct user *u; + struct NetworkClientPlayerInfo *player = NULL; - for (u = &me; u; u = u->next) - if (u->nr == c) - return u; - - Error(ERR_EXIT, "protocol error: reference to non-existing user %d", c); + for (player = &first_player; player; player = player->next) + if (player->nr == player_nr) + break; - return NULL; /* so that gcc -Wall doesn't complain */ + if (player == NULL) // should not happen + Error(ERR_EXIT, "protocol error: reference to non-existing player %d", + player_nr); + + return player; } -char *get_user_name(unsigned char c) +char *getNetworkPlayerName(int player_nr) { - struct user *u; + struct NetworkClientPlayerInfo *player; - if (c == 0) - return("the server"); - else if (c == me.nr) + if (player_nr == 0) + return("the network game server"); + else if (player_nr == first_player.nr) return("you"); else - for (u = &me; u; u = u->next) - if (u->nr == c && u->name && strlen(u->name)) - return(u->name); + for (player = &first_player; player; player = player->next) + if (player->nr == player_nr && strlen(player->name) > 0) + return(player->name); - return("no name"); + return(EMPTY_PLAYER_NAME); +} + +boolean hasStartedNetworkGame(void) +{ + return !network_level.use_network_level_files; +} + +static boolean hasPathSeparator(char *s) +{ + return (strchr(s, '/') != NULL); } static void StartNetworkServer(int port) { - switch (fork()) + static int p; + + p = port; + + server_thread = SDL_CreateThread(NetworkServerThread, + "NetworkServerThread", &p); + 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) { - case 0: - NetworkServer(port, options.serveronly); + // if no hostname given, try to auto-detect network server in local network + // by doing a UDP broadcast on the network server port and wait for answer - /* never reached */ - exit(0); + SDLNet_SocketSet udp_socket_set = SDLNet_AllocSocketSet(1); + if (!udp_socket_set) + Error(ERR_EXIT, "SDLNet_AllocSocketSet() failed: %s"), SDLNet_GetError(); - case -1: - Error(ERR_WARN, - "cannot create network server process - no network games"); - options.network = FALSE; - return; + udp = SDLNet_UDP_Open(0); + if(!udp) + Error(ERR_EXIT, "SDLNet_UDP_Open() failed: %s", SDLNet_GetError()); - default: - /* we are parent process -- resume normal operation */ - return; + 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!"); } -} -boolean ConnectToServer(char *host, int port) -{ - struct hostent *hp; - struct sockaddr_in s; - struct protoent *tcpproto; - int on = 1, i; + rfds = SDLNet_AllocSocketSet(1); - if (host) + if (hostname) { - if ((s.sin_addr.s_addr = inet_addr(host)) == -1) + char message[100]; + + SDLNet_ResolveHost(&ip, hostname, port); + + if (ip.host == INADDR_NONE) { - hp = gethostbyname(host); - if (!hp) - Error(ERR_EXIT, "cannot locate host '%s'", host); + sprintf(message, "Failed to resolve network server hostname '%s'!", + hostname); - s.sin_addr = *(struct in_addr *)(hp->h_addr_list[0]); + DrawNetworkText_Failed(message); + + 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"); + { + // 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 = DEFAULTPORT; + 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 (connect(sfd, (struct sockaddr *)&s, sizeof(s)) < 0) + if (sfd) { - if (!host) - { - printf("No rocksndiamonds server on localhost - starting up one ...\n"); + SDLNet_TCP_AddSocket(rfds, sfd); - StartNetworkServer(port); + DrawNetworkText_Success("Successfully connected!"); - for (i=0; i<6; i++) - { - u_sleep(500000); - close(sfd); + return TRUE; + } + else + { + if (hostname) + DrawNetworkText_Failed("Failed to connect to network server!"); + else + DrawNetworkText_Failed("No local network server found!"); - sfd = socket(PF_INET, SOCK_STREAM, 0); - if (sfd < 0) - Error(ERR_EXIT, "out of file descriptors"); + printf("SDLNet_TCP_Open(): %s\n", SDLNet_GetError()); + } - setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, - (char *)&on, sizeof(int)); + if (hostname) // connect to specified server failed + return FALSE; - if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0) - break; - } - if (i==6) - Error(ERR_EXIT, "cannot connect to server"); + 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; } - else - Error(ERR_EXIT, "cannot connect to server"); + + Delay_WithScreenUpdates(100); } - return(TRUE); + 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_Nickname(char *nickname) +void SendToServer_PlayerName(char *player_name) { - static char msgbuf[300]; + initNetworkBufferForWriting(write_buffer, OP_PLAYER_NAME, 0); + + putNetworkBufferString(write_buffer, player_name); + + SendNetworkBufferToServer(write_buffer); - buf[1] = OP_NICKNAME; - memcpy(&buf[2], nickname, strlen(nickname)); - sendbuf(2 + strlen(nickname)); - sprintf(msgbuf, "you set your nick to \"%s\"", nickname); - sysmsg(msgbuf); + Error(ERR_NETWORK_CLIENT, "you set your player name to \"%s\"", player_name); } -void SendToServer_ProtocolVersion() +void SendToServer_ProtocolVersion(void) { - buf[1] = OP_PROTOCOL_VERSION; - buf[2] = PROT_VERS_1; - buf[3] = PROT_VERS_2; - buf[4] = PROT_VERS_3; + initNetworkBufferForWriting(write_buffer, OP_PROTOCOL_VERSION, 0); - sendbuf(5); + 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) { - buf[1] = OP_NUMBER_WANTED; - buf[2] = nr_wanted; + initNetworkBufferForWriting(write_buffer, OP_NUMBER_WANTED, 0); + + putNetworkBuffer8BitInteger(write_buffer, nr_wanted); - sendbuf(3); + 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); + } - buf[1] = OP_START_PLAYING; - buf[2] = (byte)(level_nr >> 8); - buf[3] = (byte)(level_nr & 0xff); - buf[4] = (byte)(leveldir_nr >> 8); - buf[5] = (byte)(leveldir_nr & 0xff); + SendNetworkBufferToServer(write_buffer); - buf[6] = (unsigned char)((new_random_seed >> 24) & 0xff); - buf[7] = (unsigned char)((new_random_seed >> 16) & 0xff); - buf[8] = (unsigned char)((new_random_seed >> 8) & 0xff); - buf[9] = (unsigned char)((new_random_seed >> 0) & 0xff); + setString(&network_level.leveldir_identifier, leveldir_current->identifier); - strcpy(&buf[10], leveldir[leveldir_nr].name); + // the sending client does not use network level files (but the real ones) + network_level.use_network_level_files = FALSE; - sendbuf(10 + strlen(leveldir[leveldir_nr].name)+1); +#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_PausePlaying() +void SendToServer_StartPlaying(void) { - buf[1] = OP_PAUSE_PLAYING; + unsigned int new_random_seed = InitRND(level.random_seed); + + initNetworkBufferForWriting(write_buffer, OP_START_PLAYING, 0); - sendbuf(2); + 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 SendToServer_ContinuePlaying(void) { - buf[1] = OP_CONTINUE_PLAYING; + initNetworkBufferForWriting(write_buffer, OP_CONTINUE_PLAYING, 0); - sendbuf(2); + SendNetworkBufferToServer(write_buffer); } -void SendToServer_StopPlaying() +void SendToServer_StopPlaying(int cause_for_stopping) { - buf[1] = OP_STOP_PLAYING; + initNetworkBufferForWriting(write_buffer, OP_STOP_PLAYING, 0); + + putNetworkBuffer8BitInteger(write_buffer, cause_for_stopping); - sendbuf(2); + SendNetworkBufferToServer(write_buffer); } void SendToServer_MovePlayer(byte player_action) { - buf[1] = OP_MOVE_FIGURE; - buf[2] = player_action; + initNetworkBufferForWriting(write_buffer, OP_MOVE_PLAYER, 0); - sendbuf(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", - buf[2], buf[3], PROT_VERS_1, PROT_VERS_2, PROT_VERS_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 = buf[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", buf[0]); - me.nr = new_client_nr; + 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 */ - - *new_local_player = *old_local_player; - old_local_player->connected = FALSE; + // set relevant player settings and change to new player 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; } - TestPlayer = new_index_nr; + if (first_player.nr > MAX_PLAYERS) + Error(ERR_EXIT, "sorry, more than %d players not allowed", MAX_PLAYERS); - if (me.nr > MAX_PLAYERS) - Error(ERR_EXIT, "sorry - no more than %d players", MAX_PLAYERS); + Error(ERR_NETWORK_CLIENT, "you get client # %d", new_client_nr); - sprintf(msgbuf, "you get client # %d", new_client_nr); - sysmsg(msgbuf); + 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 = buf[2]; - int old_client_nr = buf[0]; - int new_client_nr = buf[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", buf[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 user *u; + struct NetworkClientPlayerInfo *player; - if (old_client_nr != client_nr_wanted) /* client's nr has changed */ - { - sprintf(msgbuf, "client %d switches to # %d", - old_client_nr, new_client_nr); - sysmsg(msgbuf); - } - else if (old_client_nr == me.nr) /* local player keeps his nr */ - { - sprintf(msgbuf, "keeping client # %d", new_client_nr); - sysmsg(msgbuf); - } + 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) { - /* 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; } - u = finduser(old_client_nr); - u->nr = new_client_nr; + 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; - - TestPlayer = new_index_nr; + old_player->connected_locally = FALSE; + new_player->connected_locally = TRUE; + } } - else if (old_client_nr == me.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! Player %d already exists! You are player %d!", + index_nr_wanted + 1, new_index_nr + 1); - sprintf(msgbuf, "Sorry ! %s player still exists ! You are %s player !", - color[index_nr_wanted], color[new_index_nr]); - Request(msgbuf, REQ_CONFIRM); + Request(request, REQ_CONFIRM); - sprintf(msgbuf, "cannot switch -- you keep client # %d", - new_client_nr); - sysmsg(msgbuf); + Error(ERR_NETWORK_CLIENT, "cannot switch -- you keep client # %d", + new_client_nr); } + + if (game_status == GAME_MODE_MAIN) + DrawNetworkPlayers(); } -static void Handle_OP_NICKNAME(unsigned int len) +static void Handle_OP_PLAYER_NAME(void) { - struct user *u; + 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); - printf("OP_NICKNAME: %d\n", buf[0]); - u = finduser(buf[0]); - buf[len] = 0; - sprintf(msgbuf, "client %d calls itself \"%s\"", buf[0], &buf[2]); - sysmsg(msgbuf); - strncpy(u->name, &buf[2], MAXNICKLEN); + 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() +static void Handle_OP_PLAYER_CONNECTED(void) { - struct user *u, *v = NULL; - int new_client_nr = buf[0]; + 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); - sprintf(msgbuf, "new client %d connected", new_client_nr); - sysmsg(msgbuf); + Error(ERR_NETWORK_CLIENT, "new client %d connected", new_client_nr); - for (u = &me; u; u = u->next) + for (player = &first_player; player; player = player->next) { - if (u->nr == new_client_nr) + if (player->nr == new_client_nr) Error(ERR_EXIT, "multiplayer server sent duplicate player id"); - else - v = u; + + last_player = player; } - v->next = u = checked_malloc(sizeof(struct user)); - u->nr = new_client_nr; - u->name[0] = '\0'; - u->next = NULL; + 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 = TRUE; + stored_player[new_index_nr].connected_network = TRUE; } -static void Handle_OP_PLAYER_DISCONNECTED() +static void Handle_OP_PLAYER_DISCONNECTED(void) { - struct user *u, *v; + struct NetworkClientPlayerInfo *player, *player_disconnected; + int player_nr = getNetworkBuffer8BitInteger(read_buffer); + int index_nr = player_nr - 1; - printf("OP_PLAYER_DISCONNECTED: %d\n", buf[0]); - u = finduser(buf[0]); - sprintf(msgbuf, "client %d (%s) disconnected", - buf[0], get_user_name(buf[0])); - sysmsg(msgbuf); + 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 (v = &me; v; v = v->next) - if (v->next == u) - v->next = u->next; - free(u); -} + for (player = &first_player; player; player = player->next) + if (player->next == player_disconnected) + player->next = player_disconnected->next; + free(player_disconnected); -static void Handle_OP_START_PLAYING() -{ - int new_level_nr, new_leveldir_nr; - unsigned long new_random_seed; - unsigned char *new_leveldir_name; + stored_player[index_nr].connected_locally = FALSE; + stored_player[index_nr].connected_network = FALSE; - /* - if (game_status == PLAYING) - break; - */ + if (game_status == GAME_MODE_PLAYING) + { + char message[100]; - new_level_nr = (buf[2] << 8) + buf[3]; - new_leveldir_nr = (buf[4] << 8) + buf[5]; - new_random_seed = - (buf[6] << 24) | (buf[7] << 16) | (buf[8] << 8) | (buf[9]); - new_leveldir_name = &buf[10]; + sprintf(message, "Player %d left network server! Network game stopped!", + player_nr); - printf("OP_START_PLAYING: %d\n", buf[0]); - sprintf(msgbuf, "client %d starts game [level %d from levedir %d (%s)]\n", - buf[0], - new_level_nr, - new_leveldir_nr, - new_leveldir_name); - sysmsg(msgbuf); + Request(message, REQ_CONFIRM | REQ_STAY_CLOSED); + SetGameStatus(GAME_MODE_MAIN); - if (strcmp(leveldir[new_leveldir_nr].name, new_leveldir_name) != 0) - Error(ERR_WARN, "no such level directory: '%s'",new_leveldir_name); + DrawMainMenu(); + } + else if (game_status == GAME_MODE_MAIN) + { + DrawNetworkPlayers(); + } +} - leveldir_nr = new_leveldir_nr; +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); - /* - local_player->leveldir_nr = leveldir_nr; - */ + if (!strEqual(new_leveldir_identifier, network_level.leveldir_identifier)) + { + Error(ERR_WARN, "no such level identifier: '%s'", new_leveldir_identifier); + stop_network_game = TRUE; - /* - SaveLevelSetup(); - */ + return; + } - /* - LoadPlayerInfo(PLAYER_LEVEL); - SavePlayerInfo(PLAYER_SETUP); - */ + 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; + } - level_nr = new_level_nr; + // needed if level set of network game changed graphics, sounds or music + ReloadCustomArtwork(0); TapeErase(); - LoadTape(level_nr); - /* - GetPlayerConfig(); - */ + if (network_level.use_network_level_files) + LoadNetworkLevel(&network_level); + else + LoadLevel(level_nr); + + StartGameActions(FALSE, setup.autorecord, new_random_seed); +} + +static void Handle_OP_PAUSE_PLAYING(void) +{ + int player_nr = getNetworkBuffer8BitInteger(read_buffer); + + printf("OP_PAUSE_PLAYING: %d\n", player_nr); + Error(ERR_NETWORK_CLIENT, "client %d pauses game", player_nr); - LoadLevel(level_nr); + if (game_status == GAME_MODE_PLAYING) + { + 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 (setup.autorecord) - TapeStartRecording(); + 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 (tape.recording) - tape.random_seed = new_random_seed; + 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]; - InitRND(new_random_seed); + 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); - /* - printf("tape.random_seed == %d\n", tape.random_seed); - */ + SetGameStatus(GAME_MODE_MAIN); - game_status = PLAYING; - InitGame(); + DrawMainMenu(); + } } -static void Handle_OP_PAUSE_PLAYING() +static void Handle_OP_MOVE_PLAYER(void) { - printf("OP_PAUSE_PLAYING: %d\n", buf[0]); - sprintf(msgbuf, "client %d pauses game", buf[0]); - sysmsg(msgbuf); + int player_nr = getNetworkBuffer8BitInteger(read_buffer); + int server_frame_counter = getNetworkBuffer32BitInteger(read_buffer); + int i; - tape.pausing = TRUE; - DrawVideoDisplay(VIDEO_STATE_PAUSE_ON,0); -} + if (!network_playing) + return; -static void Handle_OP_CONTINUE_PLAYING() -{ - printf("OP_CONTINUE_PLAYING: %d\n", buf[0]); - sprintf(msgbuf, "client %d continues game", buf[0]); - sysmsg(msgbuf); + 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; - tape.pausing = FALSE; - DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0); + 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; } -static void Handle_OP_STOP_PLAYING() +static void Handle_OP_BROADCAST_MESSAGE(void) { - printf("OP_STOP_PLAYING: %d\n", buf[0]); - sprintf(msgbuf, "client %d stops game", buf[0]); - sysmsg(msgbuf); + int player_nr = getNetworkBuffer8BitInteger(read_buffer); - game_status = MAINMENU; - DrawMainMenu(); + printf("OP_BROADCAST_MESSAGE: %d\n", player_nr); + Error(ERR_NETWORK_CLIENT, "client %d sends message", player_nr); } -static void Handle_OP_MOVE_FIGURE(unsigned int len) +static void Handle_OP_LEVEL_FILE(void) { - int frame_nr; - int i; + 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; - if (!network_playing) - return; + 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"); - frame_nr = - (buf[2] << 24) | (buf[3] << 16) | (buf[4] << 8) | (buf[5]); + InitNetworkLevelDirectory(leveldir_identifier); - if (frame_nr != FrameCounter) + 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) { - 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", frame_nr); - Error(ERR_EXIT, "this should not happen -- please debug"); + *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); } - /* copy valid player actions */ - for (i=0; inr); + printf("::: '%d'\n", file_info->type); + printf("::: '%d'\n", file_info->packed); + printf("::: '%s'\n", file_info->basename); + printf("::: '%s'\n", file_info->filename); - /* - sprintf(msgbuf, "frame %d: client %d moves player [0x%02x]", - FrameCounter, buf[0], buf[2]); - sysmsg(msgbuf); - */ + if (use_custom_template) + printf("::: '%s'\n", tmpl_info->filename); +#endif } -static void HandleNetworkingMessages() +static void HandleNetworkingMessage(void) { - unsigned int len; + stop_network_game = FALSE; - while (nread >= 4 && nread >= 4 + readbuf[3]) - { - len = readbuf[3]; - if (readbuf[0] || readbuf[1] || readbuf[2]) - Error(ERR_EXIT, "wrong network server line length"); + initNetworkBufferForReading(read_buffer); - memcpy(buf, &readbuf[4], len); - nread -= 4 + len; - memmove(readbuf, readbuf + 4 + len, nread); + int message_type = getNetworkBuffer8BitInteger(read_buffer); - switch(buf[1]) - { - case OP_BAD_PROTOCOL_VERSION: - Handle_OP_BAD_PROTOCOL_VERSION(); - break; + switch (message_type) + { + case OP_BAD_PROTOCOL_VERSION: + Handle_OP_BAD_PROTOCOL_VERSION(); + break; - case OP_YOUR_NUMBER: - Handle_OP_YOUR_NUMBER(); - break; + case OP_YOUR_NUMBER: + Handle_OP_YOUR_NUMBER(); + break; - case OP_NUMBER_WANTED: - Handle_OP_NUMBER_WANTED(); - break; + case OP_NUMBER_WANTED: + Handle_OP_NUMBER_WANTED(); + break; - case OP_NICKNAME: - Handle_OP_NICKNAME(len); - 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_PLAYER_CONNECTED: + Handle_OP_PLAYER_CONNECTED(); + break; - case OP_START_PLAYING: - Handle_OP_START_PLAYING(); - break; + case OP_PLAYER_DISCONNECTED: + Handle_OP_PLAYER_DISCONNECTED(); + break; - case OP_PAUSE_PLAYING: - Handle_OP_PAUSE_PLAYING(); - break; + case OP_START_PLAYING: + Handle_OP_START_PLAYING(); + break; - case OP_CONTINUE_PLAYING: - Handle_OP_CONTINUE_PLAYING(); - break; + case OP_PAUSE_PLAYING: + Handle_OP_PAUSE_PLAYING(); + break; - case OP_STOP_PLAYING: - Handle_OP_STOP_PLAYING(); - break; + case OP_CONTINUE_PLAYING: + Handle_OP_CONTINUE_PLAYING(); + break; - case OP_MOVE_FIGURE: - Handle_OP_MOVE_FIGURE(len); - break; + case OP_STOP_PLAYING: + Handle_OP_STOP_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_MOVE_PLAYER: + Handle_OP_MOVE_PLAYER(); + 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_BROADCAST_MESSAGE: + Handle_OP_BROADCAST_MESSAGE(); + 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_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 ---------- - flushbuf(); + int num_active_sockets = SDLNet_CheckSockets(rfds, 0); - FD_ZERO(&rfds); - FD_SET(sfd, &rfds); + if (num_active_sockets < 0) + return "Error checking network sockets!"; - r = select(sfd + 1, &rfds, NULL, NULL, &tv); + if (num_active_sockets == 0) + break; // no active sockets, stop here - if (r < 0 && errno != EINTR) - Error(ERR_EXIT, "HandleNetworking(): select() failed"); + // ---------- read packets from network server ---------- - if (r < 0) - FD_ZERO(&rfds); + initNetworkBufferForReceiving(read_buffer); - if (FD_ISSET(sfd, &rfds)) - { - int r; + 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; + } + + return NULL; +} + +static void FreeNetworkClientPlayerInfo(struct NetworkClientPlayerInfo *player) +{ + if (player == NULL) + return; + + if (player->next) + FreeNetworkClientPlayerInfo(player->next); - r = read(sfd, readbuf + nread, MAX_BUFFER_SIZE - nread); + checked_free(player); +} + +static void HandleNetworkingDisconnect(void) +{ + int i; - if (r < 0) - Error(ERR_EXIT, "error reading from network server"); + SDLNet_TCP_DelSocket(rfds, sfd); + SDLNet_TCP_Close(sfd); - if (r == 0) - Error(ERR_EXIT, "connection to network server lost"); + network_playing = FALSE; - nread += r; + 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; - HandleNetworkingMessages(); + 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!"); +}