tron@2186: /* $Id$ */
tron@2186: 
Darkvater@4826: #ifdef ENABLE_NETWORK
Darkvater@4826: 
truelight@543: #include "stdafx.h"
tron@1299: #include "debug.h"
tron@1317: #include "string.h"
truelight@543: #include "network_data.h"
rubidium@4261: #include "date.h"
tron@850: #include "map.h"
truelight@543: #include "network_gamelist.h"
truelight@764: #include "network_udp.h"
tron@2153: #include "variables.h"
rubidium@5339: #include "newgrf_config.h"
truelight@543: 
truelight@543: //
truelight@543: // This file handles all the LAN-stuff
truelight@543: // Stuff like:
truelight@543: //   - UDP search over the network
truelight@543: //
truelight@543: 
truelight@543: typedef enum {
truelight@638: 	PACKET_UDP_CLIENT_FIND_SERVER,
truelight@543: 	PACKET_UDP_SERVER_RESPONSE,
truelight@638: 	PACKET_UDP_CLIENT_DETAIL_INFO,
rubidium@4344: 	PACKET_UDP_SERVER_DETAIL_INFO,   // Is not used in OpenTTD itself, only for external querying
rubidium@4344: 	PACKET_UDP_SERVER_REGISTER,      // Packet to register itself to the master server
rubidium@4344: 	PACKET_UDP_MASTER_ACK_REGISTER,  // Packet indicating registration has succedeed
rubidium@4344: 	PACKET_UDP_CLIENT_GET_LIST,      // Request for serverlist from master server
truelight@764: 	PACKET_UDP_MASTER_RESPONSE_LIST, // Response from master server with server ip's + port's
rubidium@4344: 	PACKET_UDP_SERVER_UNREGISTER,    // Request to be removed from the server-list
rubidium@5339: 	PACKET_UDP_CLIENT_GET_NEWGRFS,   // Requests the name for a list of GRFs (GRF_ID and MD5)
rubidium@5339: 	PACKET_UDP_SERVER_NEWGRFS,       // Sends the list of NewGRF's requested.
truelight@543: 	PACKET_UDP_END
truelight@543: } PacketUDPType;
truelight@543: 
truelight@764: enum {
peter1138@2861: 	ADVERTISE_NORMAL_INTERVAL = 30000, // interval between advertising in ticks (15 minutes)
rubidium@4344: 	ADVERTISE_RETRY_INTERVAL  =   300, // readvertise when no response after this many ticks (9 seconds)
rubidium@4344: 	ADVERTISE_RETRY_TIMES     =     3  // give up readvertising after this much failed retries
truelight@764: };
truelight@543: 
truelight@543: #define DEF_UDP_RECEIVE_COMMAND(type) void NetworkPacketReceive_ ## type ## _command(Packet *p, struct sockaddr_in *client_addr)
tron@2817: static void NetworkSendUDP_Packet(SOCKET udp, Packet* p, struct sockaddr_in* recv);
truelight@543: 
tron@2789: static NetworkClientState _udp_cs;
truelight@903: 
rubidium@5339: /**
rubidium@5339:  * Serializes the GRFIdentifier (GRF ID and MD5 checksum) to the packet
rubidium@5339:  * @param p the packet to write the data to
rubidium@5339:  * @param c the configuration to write the GRF ID and MD5 checksum from
rubidium@5339:  */
rubidium@5339: static void NetworkSend_GRFIdentifier(Packet *p, const GRFConfig *c)
rubidium@5339: {
rubidium@5339: 	uint j;
rubidium@5339: 	NetworkSend_uint32(p, c->grfid);
rubidium@5339: 	for (j = 0; j < sizeof(c->md5sum); j++) {
rubidium@5339: 		NetworkSend_uint8 (p, c->md5sum[j]);
rubidium@5339: 	}
rubidium@5339: }
rubidium@5339: 
rubidium@5339: /**
rubidium@5339:  * Deserializes the GRFIdentifier (GRF ID and MD5 checksum) from the packet
rubidium@5339:  * @param p the packet to read the data from
rubidium@5339:  * @param c the configuration to write the GRF ID and MD5 checksum to
rubidium@5339:  */
rubidium@5339: static void NetworkRecv_GRFIdentifier(Packet *p, GRFConfig *c)
rubidium@5339: {
rubidium@5339: 	uint j;
rubidium@5339: 	c->grfid = NetworkRecv_uint32(&_udp_cs, p);
rubidium@5339: 	for (j = 0; j < sizeof(c->md5sum); j++) {
rubidium@5339: 		c->md5sum[j] = NetworkRecv_uint8(&_udp_cs, p);
rubidium@5339: 	}
rubidium@5339: }
rubidium@5339: 
truelight@638: DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_CLIENT_FIND_SERVER)
truelight@543: {
truelight@543: 	Packet *packet;
truelight@543: 	// Just a fail-safe.. should never happen
truelight@543: 	if (!_network_udp_server)
truelight@543: 		return;
truelight@543: 
truelight@543: 	packet = NetworkSend_Init(PACKET_UDP_SERVER_RESPONSE);
truelight@543: 
truelight@543: 	// Update some game_info
truelight@543: 	_network_game_info.game_date = _date;
tron@850: 	_network_game_info.map_width = MapSizeX();
tron@850: 	_network_game_info.map_height = MapSizeY();
truelight@543: 	_network_game_info.map_set = _opt.landscape;
truelight@543: 
truelight@543: 	NetworkSend_uint8 (packet, NETWORK_GAME_INFO_VERSION);
Darkvater@2879: 
rubidium@5339: 	/* NETWORK_GAME_INFO_VERSION = 4 */
rubidium@5339: 	{
rubidium@5339: 		/* Only send the GRF Identification (GRF_ID and MD5 checksum) of
rubidium@5339: 		 * the GRFs that are needed, i.e. the ones that the server has
rubidium@5339: 		 * selected in the NewGRF GUI and not the ones that are used due
rubidium@5339: 		 * to the fact that they are in [newgrf-static] in openttd.cfg */
rubidium@5339: 		const GRFConfig *c;
rubidium@5339: 		uint i = 0;
rubidium@5339: 
rubidium@5339: 		/* Count number of GRFs to send information about */
rubidium@5339: 		for (c = _grfconfig; c != NULL; c = c->next) {
rubidium@5339: 			if (!HASBIT(c->flags, GCF_STATIC)) i++;
rubidium@5339: 		}
rubidium@5339: 		NetworkSend_uint8 (packet, i); // Send number of GRFs
rubidium@5339: 
rubidium@5339: 		/* Send actual GRF Identifications */
rubidium@5339: 		for (c = _grfconfig; c != NULL; c = c->next) {
rubidium@5339: 			if (!HASBIT(c->flags, GCF_STATIC)) NetworkSend_GRFIdentifier(packet, c);
rubidium@5339: 		}
rubidium@5339: 	}
rubidium@5339: 
rubidium@4326: 	/* NETWORK_GAME_INFO_VERSION = 3 */
rubidium@4326: 	NetworkSend_uint32(packet, _network_game_info.game_date);
rubidium@4326: 	NetworkSend_uint32(packet, _network_game_info.start_date);
rubidium@4326: 
Darkvater@2879: 	/* NETWORK_GAME_INFO_VERSION = 2 */
Darkvater@2879: 	NetworkSend_uint8 (packet, _network_game_info.companies_max);
Darkvater@2944: 	NetworkSend_uint8 (packet, ActivePlayerCount());
Darkvater@2879: 	NetworkSend_uint8 (packet, _network_game_info.spectators_max);
Darkvater@2879: 
Darkvater@2879: 	/* NETWORK_GAME_INFO_VERSION = 1 */
truelight@543: 	NetworkSend_string(packet, _network_game_info.server_name);
truelight@543: 	NetworkSend_string(packet, _network_game_info.server_revision);
truelight@543: 	NetworkSend_uint8 (packet, _network_game_info.server_lang);
truelight@543: 	NetworkSend_uint8 (packet, _network_game_info.use_password);
truelight@543: 	NetworkSend_uint8 (packet, _network_game_info.clients_max);
truelight@543: 	NetworkSend_uint8 (packet, _network_game_info.clients_on);
Darkvater@2944: 	NetworkSend_uint8 (packet, NetworkSpectatorCount());
truelight@543: 	NetworkSend_string(packet, _network_game_info.map_name);
truelight@543: 	NetworkSend_uint16(packet, _network_game_info.map_width);
truelight@543: 	NetworkSend_uint16(packet, _network_game_info.map_height);
truelight@543: 	NetworkSend_uint8 (packet, _network_game_info.map_set);
truelight@543: 	NetworkSend_uint8 (packet, _network_game_info.dedicated);
truelight@543: 
truelight@543: 	// Let the client know that we are here
truelight@764: 	NetworkSendUDP_Packet(_udp_server_socket, packet, client_addr);
truelight@543: 
truelight@543: 	free(packet);
truelight@543: 
Darkvater@5568: 	DEBUG(net, 2, "[udp] queried from '%s'", inet_ntoa(client_addr->sin_addr));
truelight@543: }
truelight@543: 
truelight@543: DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_SERVER_RESPONSE)
truelight@543: {
Darkvater@2881: 	extern const char _openttd_revision[];
truelight@543: 	NetworkGameList *item;
truelight@543: 	byte game_info_version;
truelight@543: 
truelight@543: 	// Just a fail-safe.. should never happen
truelight@543: 	if (_network_udp_server)
truelight@543: 		return;
truelight@543: 
truelight@903: 	game_info_version = NetworkRecv_uint8(&_udp_cs, p);
truelight@543: 
Darkvater@4880: 	if (_udp_cs.has_quit) return;
truelight@764: 
Darkvater@5568: 	DEBUG(net, 4, "[udp] server response from %s:%d", inet_ntoa(client_addr->sin_addr),ntohs(client_addr->sin_port));
truelight@764: 
truelight@543: 	// Find next item
truelight@543: 	item = NetworkGameListAddItem(inet_addr(inet_ntoa(client_addr->sin_addr)), ntohs(client_addr->sin_port));
truelight@543: 
rubidium@5339: 	item->info.compatible = true;
Darkvater@2881: 	/* Please observer the order. In the order in which packets are sent
Darkvater@2879: 	 * they are to be received */
Darkvater@2879: 	switch (game_info_version) {
rubidium@5339: 		case 4: {
rubidium@5339: 			GRFConfig *c, **dst = &item->info.grfconfig;
rubidium@5339: 			const GRFConfig *f;
rubidium@5339: 			uint i;
rubidium@5339: 			uint num_grfs = NetworkRecv_uint8(&_udp_cs, p);
rubidium@5339: 
rubidium@5339: 			for (i = 0; i < num_grfs; i++) {
rubidium@5339: 				c = calloc(1, sizeof(*c));
rubidium@5339: 				NetworkRecv_GRFIdentifier(p, c);
rubidium@5339: 
rubidium@5339: 				/* Find the matching GRF file */
rubidium@5339: 				f = FindGRFConfig(c->grfid, c->md5sum);
rubidium@5339: 				if (f == NULL) {
rubidium@5339: 					/* Don't know the GRF, so mark game incompatible and the (possibly)
rubidium@5339: 					 * already resolved name for this GRF (another server has sent the
rubidium@5339: 					 * name of the GRF already */
rubidium@5339: 					item->info.compatible = false;
rubidium@5339: 					c->name     = FindUnknownGRFName(c->grfid, c->md5sum, true);
rubidium@5339: 					SETBIT(c->flags, GCF_NOT_FOUND);
rubidium@5339: 				} else {
rubidium@5339: 					c->filename = f->filename;
rubidium@5339: 					c->name     = f->name;
rubidium@5339: 					c->info     = f->info;
rubidium@5339: 				}
rubidium@5339: 				SETBIT(c->flags, GCF_COPY);
rubidium@5339: 
rubidium@5339: 				/* Append GRFConfig to the list */
rubidium@5339: 				*dst = c;
rubidium@5339: 				dst = &c->next;
rubidium@5339: 			}
rubidium@5339: 		} /* Fallthrough */
rubidium@4326: 		case 3:
rubidium@4326: 			item->info.game_date     = NetworkRecv_uint32(&_udp_cs, p);
rubidium@4326: 			item->info.start_date    = NetworkRecv_uint32(&_udp_cs, p);
rubidium@4326: 			/* Fallthrough */
Darkvater@2879: 		case 2:
Darkvater@2879: 			item->info.companies_max = NetworkRecv_uint8(&_udp_cs, p);
Darkvater@2879: 			item->info.companies_on = NetworkRecv_uint8(&_udp_cs, p);
Darkvater@2879: 			item->info.spectators_max = NetworkRecv_uint8(&_udp_cs, p);
Darkvater@2879: 			/* Fallthrough */
Darkvater@2879: 		case 1:
Darkvater@2879: 			NetworkRecv_string(&_udp_cs, p, item->info.server_name, sizeof(item->info.server_name));
Darkvater@2879: 			NetworkRecv_string(&_udp_cs, p, item->info.server_revision, sizeof(item->info.server_revision));
Darkvater@2879: 			item->info.server_lang   = NetworkRecv_uint8(&_udp_cs, p);
Darkvater@2879: 			item->info.use_password  = NetworkRecv_uint8(&_udp_cs, p);
Darkvater@2879: 			item->info.clients_max   = NetworkRecv_uint8(&_udp_cs, p);
Darkvater@2879: 			item->info.clients_on    = NetworkRecv_uint8(&_udp_cs, p);
Darkvater@2879: 			item->info.spectators_on = NetworkRecv_uint8(&_udp_cs, p);
rubidium@4326: 			if (game_info_version < 3) { // 16 bits dates got scrapped and are read earlier
rubidium@4326: 				item->info.game_date     = NetworkRecv_uint16(&_udp_cs, p) + DAYS_TILL_ORIGINAL_BASE_YEAR;
rubidium@4326: 				item->info.start_date    = NetworkRecv_uint16(&_udp_cs, p) + DAYS_TILL_ORIGINAL_BASE_YEAR;
rubidium@4326: 			}
Darkvater@2879: 			NetworkRecv_string(&_udp_cs, p, item->info.map_name, sizeof(item->info.map_name));
Darkvater@2879: 			item->info.map_width     = NetworkRecv_uint16(&_udp_cs, p);
Darkvater@2879: 			item->info.map_height    = NetworkRecv_uint16(&_udp_cs, p);
Darkvater@2879: 			item->info.map_set       = NetworkRecv_uint8(&_udp_cs, p);
Darkvater@2879: 			item->info.dedicated     = NetworkRecv_uint8(&_udp_cs, p);
truelight@543: 
Darkvater@2879: 			if (item->info.server_lang >= NETWORK_NUM_LANGUAGES) item->info.server_lang = 0;
Darkvater@2879: 			if (item->info.map_set >= NUM_LANDSCAPE ) item->info.map_set = 0;
Darkvater@2775: 
Darkvater@2879: 			if (item->info.hostname[0] == '\0')
Darkvater@2879: 				snprintf(item->info.hostname, sizeof(item->info.hostname), "%s", inet_ntoa(client_addr->sin_addr));
Darkvater@2881: 
Darkvater@2881: 			/* Check if we are allowed on this server based on the revision-match */
rubidium@5339: 			item->info.version_compatible =
tron@4077: 				strcmp(item->info.server_revision, _openttd_revision) == 0 ||
tron@4077: 				strcmp(item->info.server_revision, NOREV_STRING) == 0;
rubidium@5339: 			item->info.compatible &= item->info.version_compatible; // Already contains match for GRFs
Darkvater@2879: 			break;
truelight@543: 	}
truelight@543: 
rubidium@5339: 	{
rubidium@5339: 		/* Checks whether there needs to be a request for names of GRFs and makes
rubidium@5339: 		 * the request if necessary. GRFs that need to be requested are the GRFs
rubidium@5339: 		 * that do not exist on the clients system and we do not have the name
rubidium@5339: 		 * resolved of, i.e. the name is still UNKNOWN_GRF_NAME_PLACEHOLDER.
rubidium@5339: 		 * The in_request array and in_request_count are used so there is no need
rubidium@5339: 		 * to do a second loop over the GRF list, which can be relatively expensive
rubidium@5339: 		 * due to the string comparisons. */
rubidium@5339: 		const GRFConfig *in_request[NETWORK_MAX_GRF_COUNT];
rubidium@5339: 		const GRFConfig *c;
rubidium@5339: 		uint in_request_count = 0;
rubidium@5339: 		struct sockaddr_in out_addr;
rubidium@5339: 
rubidium@5339: 		for (c = item->info.grfconfig; c != NULL; c = c->next) {
rubidium@5339: 			if (!HASBIT(c->flags, GCF_NOT_FOUND) || strcmp(c->name, UNKNOWN_GRF_NAME_PLACEHOLDER) != 0) continue;
rubidium@5339: 			in_request[in_request_count] = c;
rubidium@5339: 			in_request_count++;
rubidium@5339: 		}
rubidium@5339: 
rubidium@5339: 		if (in_request_count > 0) {
rubidium@5339: 			/* There are 'unknown' GRFs, now send a request for them */
rubidium@5339: 			uint i;
rubidium@5339: 			Packet *packet = NetworkSend_Init(PACKET_UDP_CLIENT_GET_NEWGRFS);
rubidium@5339: 
rubidium@5339: 			NetworkSend_uint8 (packet, in_request_count);
rubidium@5339: 			for (i = 0; i < in_request_count; i++) {
rubidium@5339: 				NetworkSend_GRFIdentifier(packet, in_request[i]);
rubidium@5339: 			}
rubidium@5339: 
rubidium@5339: 			out_addr.sin_family      = AF_INET;
rubidium@5339: 			out_addr.sin_port        = htons(item->port);
rubidium@5339: 			out_addr.sin_addr.s_addr = item->ip;
rubidium@5339: 			NetworkSendUDP_Packet(_udp_client_socket, packet, &out_addr);
rubidium@5339: 			free(packet);
rubidium@5339: 		}
rubidium@5339: 	}
rubidium@5339: 
truelight@543: 	item->online = true;
truelight@543: 
truelight@543: 	UpdateNetworkGameWindow(false);
truelight@543: }
truelight@543: 
truelight@638: DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_CLIENT_DETAIL_INFO)
truelight@638: {
truelight@716: 	NetworkClientState *cs;
truelight@638: 	NetworkClientInfo *ci;
truelight@638: 	Packet *packet;
truelight@638: 	Player *player;
truelight@638: 	byte current = 0;
truelight@638: 	int i;
truelight@638: 
truelight@638: 	// Just a fail-safe.. should never happen
tron@4077: 	if (!_network_udp_server) return;
truelight@638: 
truelight@638: 	packet = NetworkSend_Init(PACKET_UDP_SERVER_DETAIL_INFO);
truelight@638: 
truelight@638: 	/* Send the amount of active companies */
truelight@638: 	NetworkSend_uint8 (packet, NETWORK_COMPANY_INFO_VERSION);
Darkvater@2944: 	NetworkSend_uint8 (packet, ActivePlayerCount());
truelight@638: 
truelight@638: 	/* Fetch the latest version of everything */
truelight@638: 	NetworkPopulateCompanyInfo();
truelight@638: 
truelight@638: 	/* Go through all the players */
truelight@638: 	FOR_ALL_PLAYERS(player) {
truelight@638: 		/* Skip non-active players */
tron@4077: 		if (!player->is_active) continue;
truelight@638: 
truelight@638: 		current++;
truelight@638: 
truelight@638: 		/* Send the information */
tron@4077: 		NetworkSend_uint8(packet, current);
truelight@638: 
truelight@638: 		NetworkSend_string(packet, _network_player_info[player->index].company_name);
rubidium@4326: 		NetworkSend_uint32(packet, _network_player_info[player->index].inaugurated_year);
truelight@638: 		NetworkSend_uint64(packet, _network_player_info[player->index].company_value);
truelight@638: 		NetworkSend_uint64(packet, _network_player_info[player->index].money);
truelight@638: 		NetworkSend_uint64(packet, _network_player_info[player->index].income);
truelight@638: 		NetworkSend_uint16(packet, _network_player_info[player->index].performance);
truelight@638: 
tron@4077: 		/* Send 1 if there is a passord for the company else send 0 */
truelight@1011: 		if (_network_player_info[player->index].password[0] != '\0') {
tron@4077: 			NetworkSend_uint8(packet, 1);
truelight@1011: 		} else {
tron@4077: 			NetworkSend_uint8(packet, 0);
tron@1019: 		}
tron@1019: 
truelight@638: 		for (i = 0; i < NETWORK_VEHICLE_TYPES; i++)
truelight@638: 			NetworkSend_uint16(packet, _network_player_info[player->index].num_vehicle[i]);
truelight@638: 
truelight@638: 		for (i = 0; i < NETWORK_STATION_TYPES; i++)
truelight@638: 			NetworkSend_uint16(packet, _network_player_info[player->index].num_station[i]);
truelight@638: 
truelight@638: 		/* Find the clients that are connected to this player */
truelight@638: 		FOR_ALL_CLIENTS(cs) {
truelight@638: 			ci = DEREF_CLIENT_INFO(cs);
Darkvater@4878: 			if (ci->client_playas == player->index) {
truelight@638: 				/* The uint8 == 1 indicates that a client is following */
truelight@638: 				NetworkSend_uint8(packet, 1);
truelight@638: 				NetworkSend_string(packet, ci->client_name);
truelight@638: 				NetworkSend_string(packet, ci->unique_id);
rubidium@4326: 				NetworkSend_uint32(packet, ci->join_date);
truelight@638: 			}
truelight@638: 		}
truelight@638: 		/* Also check for the server itself */
truelight@638: 		ci = NetworkFindClientInfoFromIndex(NETWORK_SERVER_INDEX);
Darkvater@4878: 		if (ci->client_playas == player->index) {
truelight@638: 			/* The uint8 == 1 indicates that a client is following */
truelight@638: 			NetworkSend_uint8(packet, 1);
truelight@638: 			NetworkSend_string(packet, ci->client_name);
truelight@638: 			NetworkSend_string(packet, ci->unique_id);
rubidium@4326: 			NetworkSend_uint32(packet, ci->join_date);
truelight@638: 		}
truelight@638: 
truelight@638: 		/* Indicates end of client list */
truelight@638: 		NetworkSend_uint8(packet, 0);
truelight@638: 	}
truelight@638: 
truelight@638: 	/* And check if we have any spectators */
truelight@638: 	FOR_ALL_CLIENTS(cs) {
truelight@638: 		ci = DEREF_CLIENT_INFO(cs);
Darkvater@4878: 		if (!IsValidPlayer(ci->client_playas)) {
truelight@638: 			/* The uint8 == 1 indicates that a client is following */
truelight@638: 			NetworkSend_uint8(packet, 1);
truelight@638: 			NetworkSend_string(packet, ci->client_name);
truelight@638: 			NetworkSend_string(packet, ci->unique_id);
rubidium@4326: 			NetworkSend_uint32(packet, ci->join_date);
truelight@638: 		}
truelight@638: 	}
Darkvater@4880: 
truelight@638: 	/* Also check for the server itself */
truelight@638: 	ci = NetworkFindClientInfoFromIndex(NETWORK_SERVER_INDEX);
Darkvater@4878: 	if (!IsValidPlayer(ci->client_playas)) {
truelight@638: 		/* The uint8 == 1 indicates that a client is following */
truelight@638: 		NetworkSend_uint8(packet, 1);
truelight@638: 		NetworkSend_string(packet, ci->client_name);
truelight@638: 		NetworkSend_string(packet, ci->unique_id);
rubidium@4326: 		NetworkSend_uint32(packet, ci->join_date);
truelight@638: 	}
truelight@638: 
truelight@638: 	/* Indicates end of client list */
truelight@638: 	NetworkSend_uint8(packet, 0);
truelight@638: 
truelight@764: 	NetworkSendUDP_Packet(_udp_server_socket, packet, client_addr);
truelight@638: 
truelight@638: 	free(packet);
truelight@638: }
truelight@638: 
tron@4077: DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_MASTER_RESPONSE_LIST)
tron@4077: {
truelight@764: 	int i;
truelight@764: 	struct in_addr ip;
truelight@764: 	uint16 port;
truelight@764: 	uint8 ver;
truelight@764: 
truelight@764: 	/* packet begins with the protocol version (uint8)
truelight@764: 	 * then an uint16 which indicates how many
truelight@764: 	 * ip:port pairs are in this packet, after that
truelight@764: 	 * an uint32 (ip) and an uint16 (port) for each pair
truelight@764: 	 */
truelight@764: 
truelight@903: 	ver = NetworkRecv_uint8(&_udp_cs, p);
truelight@903: 
Darkvater@4880: 	if (_udp_cs.has_quit) return;
truelight@764: 
truelight@764: 	if (ver == 1) {
truelight@903: 		for (i = NetworkRecv_uint16(&_udp_cs, p); i != 0 ; i--) {
truelight@903: 			ip.s_addr = TO_LE32(NetworkRecv_uint32(&_udp_cs, p));
truelight@903: 			port = NetworkRecv_uint16(&_udp_cs, p);
truelight@764: 			NetworkUDPQueryServer(inet_ntoa(ip), port);
truelight@764: 		}
truelight@764: 	}
truelight@764: }
truelight@764: 
tron@4077: DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_MASTER_ACK_REGISTER)
tron@4077: {
truelight@764: 	_network_advertise_retries = 0;
Darkvater@5568: 	DEBUG(net, 2, "[udp] advertising on master server successfull");
truelight@765: 
Darkvater@5568: 	/* We are advertised, but we don't want to! */
Darkvater@5568: 	if (!_network_advertise) NetworkUDPRemoveAdvertise();
truelight@764: }
truelight@764: 
rubidium@5339: /**
rubidium@5339:  * A client has requested the names of some NewGRFs.
rubidium@5339:  *
rubidium@5339:  * Replying this can be tricky as we have a limit of SEND_MTU bytes
rubidium@5339:  * in the reply packet and we can send up to 100 bytes per NewGRF
rubidium@5339:  * (GRF ID, MD5sum and NETWORK_GRF_NAME_LENGTH bytes for the name).
rubidium@5339:  * As SEND_MTU is _much_ less than 100 * NETWORK_MAX_GRF_COUNT, it
rubidium@5339:  * could be that a packet overflows. To stop this we only reply
rubidium@5339:  * with the first N NewGRFs so that if the first N + 1 NewGRFs
rubidium@5339:  * would be sent, the packet overflows.
rubidium@5339:  * in_reply and in_reply_count are used to keep a list of GRFs to
rubidium@5339:  * send in the reply.
rubidium@5339:  */
rubidium@5339: DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_CLIENT_GET_NEWGRFS)
rubidium@5339: {
rubidium@5339: 	uint8 num_grfs;
rubidium@5339: 	uint i;
rubidium@5339: 
rubidium@5339: 	const GRFConfig *in_reply[NETWORK_MAX_GRF_COUNT];
rubidium@5339: 	Packet *packet;
rubidium@5339: 	uint8 in_reply_count = 0;
rubidium@5339: 	uint packet_len = 0;
rubidium@5339: 
rubidium@5339: 	/* Just a fail-safe.. should never happen */
rubidium@5339: 	if (_udp_cs.has_quit) return;
rubidium@5339: 
Darkvater@5568: 	DEBUG(net, 6, "[udp] newgrf data request from %s:%d", inet_ntoa(client_addr->sin_addr), ntohs(client_addr->sin_port));
rubidium@5339: 
rubidium@5339: 	num_grfs = NetworkRecv_uint8 (&_udp_cs, p);
rubidium@5339: 	if (num_grfs > NETWORK_MAX_GRF_COUNT) return;
rubidium@5339: 
rubidium@5339: 	for (i = 0; i < num_grfs; i++) {
rubidium@5339: 		GRFConfig c;
rubidium@5339: 		const GRFConfig *f;
rubidium@5339: 
rubidium@5339: 		NetworkRecv_GRFIdentifier(p, &c);
rubidium@5339: 
rubidium@5339: 		/* Find the matching GRF file */
rubidium@5339: 		f = FindGRFConfig(c.grfid, c.md5sum);
rubidium@5339: 		if (f == NULL) continue; // The GRF is unknown to this server
rubidium@5339: 
rubidium@5339: 		/* If the reply might exceed the size of the packet, only reply
rubidium@5341: 		 * the current list and do not send the other data.
rubidium@5341: 		 * The name could be an empty string, if so take the filename. */
rubidium@5341: 		packet_len += sizeof(c.grfid) + sizeof(c.md5sum) +
rubidium@5341: 				min(strlen((f->name != NULL && strlen(f->name) > 0) ? f->name : f->filename) + 1, NETWORK_GRF_NAME_LENGTH);
rubidium@5339: 		if (packet_len > SEND_MTU - 4) { // 4 is 3 byte header + grf count in reply
rubidium@5339: 			break;
rubidium@5339: 		}
rubidium@5339: 		in_reply[in_reply_count] = f;
rubidium@5339: 		in_reply_count++;
rubidium@5339: 	}
rubidium@5339: 
rubidium@5339: 	if (in_reply_count == 0) return;
rubidium@5339: 
rubidium@5339: 	packet = NetworkSend_Init(PACKET_UDP_SERVER_NEWGRFS);
rubidium@5339: 	NetworkSend_uint8 (packet, in_reply_count);
rubidium@5339: 	for (i = 0; i < in_reply_count; i++) {
rubidium@5339: 		char name[NETWORK_GRF_NAME_LENGTH];
rubidium@5341: 
rubidium@5341: 		/* The name could be an empty string, if so take the filename */
rubidium@5341: 		ttd_strlcpy(name, (in_reply[i]->name != NULL && strlen(in_reply[i]->name) > 0) ?
rubidium@5341: 				in_reply[i]->name : in_reply[i]->filename, sizeof(name));
rubidium@5341: 	 	NetworkSend_GRFIdentifier(packet, in_reply[i]);
rubidium@5339: 		NetworkSend_string(packet, name);
rubidium@5339: 	}
rubidium@5339: 
rubidium@5339: 	NetworkSendUDP_Packet(_udp_server_socket, packet, client_addr);
rubidium@5339: 	free(packet);
rubidium@5339: }
rubidium@5339: 
rubidium@5339: /** The return of the client's request of the names of some NewGRFs */
rubidium@5339: DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_SERVER_NEWGRFS)
rubidium@5339: {
rubidium@5339: 	uint8 num_grfs;
rubidium@5339: 	uint i;
rubidium@5339: 
rubidium@5339: 	/* Just a fail-safe.. should never happen */
rubidium@5339: 	if (_udp_cs.has_quit) return;
rubidium@5339: 
Darkvater@5568: 	DEBUG(net, 6, "[udp] newgrf data reply from %s:%d", inet_ntoa(client_addr->sin_addr),ntohs(client_addr->sin_port));
rubidium@5339: 
rubidium@5339: 	num_grfs = NetworkRecv_uint8 (&_udp_cs, p);
rubidium@5339: 	if (num_grfs > NETWORK_MAX_GRF_COUNT) return;
rubidium@5339: 
rubidium@5339: 	for (i = 0; i < num_grfs; i++) {
rubidium@5339: 		char *unknown_name;
rubidium@5339: 		char name[NETWORK_GRF_NAME_LENGTH];
rubidium@5339: 		GRFConfig c;
rubidium@5339: 
rubidium@5339: 		NetworkRecv_GRFIdentifier(p, &c);
rubidium@5339: 		NetworkRecv_string(&_udp_cs, p, name, sizeof(name));
rubidium@5339: 
rubidium@5341: 		/* An empty name is not possible under normal circumstances
rubidium@5341: 		 * and causes problems when showing the NewGRF list. */
rubidium@5341: 		if (strlen(name) == 0) continue;
rubidium@5341: 
rubidium@5339: 		/* Finds the fake GRFConfig for the just read GRF ID and MD5sum tuple.
rubidium@5339: 		 * If it exists and not resolved yet, then name of the fake GRF is
rubidium@5339: 		 * overwritten with the name from the reply. */
rubidium@5339: 		unknown_name = FindUnknownGRFName(c.grfid, c.md5sum, false);
rubidium@5339: 		if (unknown_name != NULL && strcmp(unknown_name, UNKNOWN_GRF_NAME_PLACEHOLDER) == 0) {
rubidium@5339: 			ttd_strlcpy(unknown_name, name, NETWORK_GRF_NAME_LENGTH);
rubidium@5339: 		}
rubidium@5339: 	}
rubidium@5339: }
rubidium@5339: 
truelight@543: 
truelight@543: // The layout for the receive-functions by UDP
truelight@543: typedef void NetworkUDPPacket(Packet *p, struct sockaddr_in *client_addr);
truelight@543: 
truelight@543: static NetworkUDPPacket* const _network_udp_packet[] = {
truelight@638: 	RECEIVE_COMMAND(PACKET_UDP_CLIENT_FIND_SERVER),
truelight@543: 	RECEIVE_COMMAND(PACKET_UDP_SERVER_RESPONSE),
truelight@638: 	RECEIVE_COMMAND(PACKET_UDP_CLIENT_DETAIL_INFO),
truelight@638: 	NULL,
truelight@668: 	NULL,
truelight@764: 	RECEIVE_COMMAND(PACKET_UDP_MASTER_ACK_REGISTER),
truelight@764: 	NULL,
truelight@765: 	RECEIVE_COMMAND(PACKET_UDP_MASTER_RESPONSE_LIST),
rubidium@5339: 	NULL,
rubidium@5339: 	RECEIVE_COMMAND(PACKET_UDP_CLIENT_GET_NEWGRFS),
rubidium@5339: 	RECEIVE_COMMAND(PACKET_UDP_SERVER_NEWGRFS),
truelight@543: };
truelight@543: 
truelight@764: 
truelight@543: // If this fails, check the array above with network_data.h
truelight@543: assert_compile(lengthof(_network_udp_packet) == PACKET_UDP_END);
truelight@543: 
truelight@543: 
tron@2817: static void NetworkHandleUDPPacket(Packet* p, struct sockaddr_in* client_addr)
truelight@543: {
truelight@543: 	byte type;
truelight@543: 
truelight@903: 	/* Fake a client, so we can see when there is an illegal packet */
truelight@903: 	_udp_cs.socket = INVALID_SOCKET;
Darkvater@4880: 	_udp_cs.has_quit = false;
truelight@543: 
truelight@903: 	type = NetworkRecv_uint8(&_udp_cs, p);
truelight@903: 
Darkvater@4880: 	if (type < PACKET_UDP_END && _network_udp_packet[type] != NULL && !_udp_cs.has_quit) {
truelight@543: 		_network_udp_packet[type](p, client_addr);
truelight@3547: 	} else {
Darkvater@4880: 		if (!_udp_cs.has_quit) {
Darkvater@5568: 			DEBUG(net, 0, "[udp] received invalid packet type %d", type);
truelight@3547: 		} else {
Darkvater@5568: 			DEBUG(net, 0, "[udp] received illegal packet");
truelight@3547: 		}
truelight@543: 	}
truelight@543: }
truelight@543: 
truelight@543: 
truelight@543: // Send a packet over UDP
tron@2817: static void NetworkSendUDP_Packet(SOCKET udp, Packet* p, struct sockaddr_in* recv)
truelight@543: {
truelight@543: 	int res;
truelight@543: 
truelight@543: 	// Put the length in the buffer
truelight@543: 	p->buffer[0] = p->size & 0xFF;
truelight@543: 	p->buffer[1] = p->size >> 8;
truelight@543: 
truelight@543: 	// Send the buffer
truelight@543: 	res = sendto(udp, p->buffer, p->size, 0, (struct sockaddr *)recv, sizeof(*recv));
truelight@543: 
Darkvater@5568: 	// Check for any errors, but ignore it otherwise
Darkvater@5568: 	if (res == -1) DEBUG(net, 1, "[udp] sendto failed with: %i", GET_LAST_ERROR());
truelight@543: }
truelight@543: 
truelight@543: // Start UDP listener
truelight@764: bool NetworkUDPListen(SOCKET *udp, uint32 host, uint16 port, bool broadcast)
truelight@543: {
truelight@543: 	struct sockaddr_in sin;
truelight@543: 
truelight@764: 	// Make sure socket is closed
truelight@764: 	closesocket(*udp);
truelight@543: 
truelight@764: 	*udp = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
truelight@764: 	if (*udp == INVALID_SOCKET) {
Darkvater@5568: 		DEBUG(net, 0, "[udp] failed to start UDP listener");
truelight@543: 		return false;
truelight@543: 	}
truelight@543: 
truelight@543: 	// set nonblocking mode for socket
truelight@543: 	{
truelight@543: 		unsigned long blocking = 1;
bjarni@2497: #ifndef BEOS_NET_SERVER
truelight@764: 		ioctlsocket(*udp, FIONBIO, &blocking);
bjarni@2497: #else
truelight@2524: 		setsockopt(*udp, SOL_SOCKET, SO_NONBLOCK, &blocking, NULL);
bjarni@2497: #endif
truelight@543: 	}
truelight@543: 
truelight@543: 	sin.sin_family = AF_INET;
truelight@543: 	// Listen on all IPs
truelight@543: 	sin.sin_addr.s_addr = host;
truelight@543: 	sin.sin_port = htons(port);
truelight@543: 
truelight@764: 	if (bind(*udp, (struct sockaddr*)&sin, sizeof(sin)) != 0) {
Darkvater@5568: 		DEBUG(net, 0, "[udp] bind failed on %s:%i", inet_ntoa(*(struct in_addr *)&host), port);
truelight@543: 		return false;
truelight@543: 	}
truelight@543: 
truelight@764: 	if (broadcast) {
truelight@764: 		/* Enable broadcast */
truelight@543: 		unsigned long val = 1;
bjarni@2497: #ifndef BEOS_NET_SERVER // will work around this, some day; maybe.
truelight@764: 		setsockopt(*udp, SOL_SOCKET, SO_BROADCAST, (char *) &val , sizeof(val));
bjarni@2497: #endif
truelight@543: 	}
truelight@543: 
Darkvater@5568: 	DEBUG(net, 1, "[udp] listening on port %s:%d", inet_ntoa(*(struct in_addr *)&host), port);
truelight@543: 
truelight@543: 	return true;
truelight@543: }
truelight@543: 
truelight@543: // Close UDP connection
truelight@543: void NetworkUDPClose(void)
truelight@543: {
Darkvater@5568: 	DEBUG(net, 1, "[udp] closed listeners");
truelight@543: 
truelight@543: 	if (_network_udp_server) {
truelight@985: 		if (_udp_server_socket != INVALID_SOCKET) {
truelight@985: 			closesocket(_udp_server_socket);
truelight@985: 			_udp_server_socket = INVALID_SOCKET;
truelight@985: 		}
truelight@764: 
truelight@985: 		if (_udp_master_socket != INVALID_SOCKET) {
truelight@985: 			closesocket(_udp_master_socket);
truelight@985: 			_udp_master_socket = INVALID_SOCKET;
truelight@985: 		}
truelight@764: 
truelight@543: 		_network_udp_server = false;
truelight@543: 		_network_udp_broadcast = 0;
truelight@543: 	} else {
truelight@985: 		if (_udp_client_socket != INVALID_SOCKET) {
truelight@985: 			closesocket(_udp_client_socket);
truelight@985: 			_udp_client_socket = INVALID_SOCKET;
truelight@985: 		}
truelight@543: 		_network_udp_broadcast = 0;
truelight@543: 	}
truelight@543: }
truelight@543: 
truelight@543: // Receive something on UDP level
truelight@764: void NetworkUDPReceive(SOCKET udp)
truelight@543: {
truelight@543: 	struct sockaddr_in client_addr;
tron@1343: 	socklen_t client_len;
truelight@543: 	int nbytes;
truelight@543: 	static Packet *p = NULL;
truelight@543: 	int packet_len;
truelight@543: 
truelight@543: 	// If p is NULL, malloc him.. this prevents unneeded mallocs
tron@4077: 	if (p == NULL) p = malloc(sizeof(*p));
truelight@543: 
truelight@543: 	packet_len = sizeof(p->buffer);
truelight@543: 	client_len = sizeof(client_addr);
truelight@543: 
truelight@543: 	// Try to receive anything
truelight@543: 	nbytes = recvfrom(udp, p->buffer, packet_len, 0, (struct sockaddr *)&client_addr, &client_len);
truelight@543: 
truelight@543: 	// We got some bytes.. just asume we receive the whole packet
truelight@543: 	if (nbytes > 0) {
truelight@543: 		// Get the size of the buffer
truelight@543: 		p->size = (uint16)p->buffer[0];
truelight@543: 		p->size += (uint16)p->buffer[1] << 8;
truelight@543: 		// Put the position on the right place
truelight@543: 		p->pos = 2;
truelight@543: 		p->next = NULL;
truelight@543: 
truelight@543: 		// Handle the packet
truelight@543: 		NetworkHandleUDPPacket(p, &client_addr);
truelight@543: 
truelight@543: 		// Free the packet
truelight@543: 		free(p);
truelight@543: 		p = NULL;
truelight@543: 	}
truelight@543: }
truelight@543: 
truelight@543: // Broadcast to all ips
tron@2817: static void NetworkUDPBroadCast(SOCKET udp)
truelight@543: {
tron@4077: 	Packet* p = NetworkSend_Init(PACKET_UDP_CLIENT_FIND_SERVER);
tron@4077: 	uint i;
truelight@543: 
tron@4077: 	for (i = 0; _broadcast_list[i] != 0; i++) {
tron@4077: 		struct sockaddr_in out_addr;
truelight@543: 
truelight@543: 		out_addr.sin_family = AF_INET;
truelight@543: 		out_addr.sin_port = htons(_network_server_port);
tron@4034: 		out_addr.sin_addr.s_addr = _broadcast_list[i];
tron@4034: 
Darkvater@5568: 		DEBUG(net, 4, "[udp] broadcasting to %s", inet_ntoa(out_addr.sin_addr));
truelight@543: 
truelight@764: 		NetworkSendUDP_Packet(udp, p, &out_addr);
truelight@543: 	}
tron@4035: 
tron@4035: 	free(p);
truelight@764: }
truelight@764: 
truelight@764: 
truelight@764: // Request the the server-list from the master server
truelight@764: void NetworkUDPQueryMasterServer(void)
truelight@764: {
truelight@764: 	struct sockaddr_in out_addr;
truelight@764: 	Packet *p;
truelight@764: 
truelight@764: 	if (_udp_client_socket == INVALID_SOCKET)
truelight@764: 		if (!NetworkUDPListen(&_udp_client_socket, 0, 0, true))
truelight@764: 			return;
truelight@764: 
truelight@764: 	p = NetworkSend_Init(PACKET_UDP_CLIENT_GET_LIST);
truelight@764: 
truelight@764: 	out_addr.sin_family = AF_INET;
truelight@764: 	out_addr.sin_port = htons(NETWORK_MASTER_SERVER_PORT);
truelight@764: 	out_addr.sin_addr.s_addr = NetworkResolveHost(NETWORK_MASTER_SERVER_HOST);
truelight@764: 
truelight@764: 	// packet only contains protocol version
truelight@764: 	NetworkSend_uint8(p, NETWORK_MASTER_SERVER_VERSION);
truelight@764: 
truelight@764: 	NetworkSendUDP_Packet(_udp_client_socket, p, &out_addr);
truelight@764: 
Darkvater@5568: 	DEBUG(net, 2, "[udp] master server queried at %s:%d", inet_ntoa(out_addr.sin_addr),ntohs(out_addr.sin_port));
truelight@543: 
truelight@543: 	free(p);
truelight@543: }
truelight@543: 
truelight@543: // Find all servers
truelight@543: void NetworkUDPSearchGame(void)
truelight@543: {
truelight@543: 	// We are still searching..
Darkvater@5568: 	if (_network_udp_broadcast > 0) return;
truelight@543: 
truelight@543: 	// No UDP-socket yet..
truelight@543: 	if (_udp_client_socket == INVALID_SOCKET)
truelight@764: 		if (!NetworkUDPListen(&_udp_client_socket, 0, 0, true))
truelight@543: 			return;
truelight@543: 
Darkvater@5568: 	DEBUG(net, 0, "[udp] searching server");
truelight@543: 
truelight@764: 	NetworkUDPBroadCast(_udp_client_socket);
truelight@543: 	_network_udp_broadcast = 300; // Stay searching for 300 ticks
truelight@543: }
truelight@543: 
tron@1329: NetworkGameList *NetworkUDPQueryServer(const char* host, unsigned short port)
truelight@543: {
truelight@543: 	struct sockaddr_in out_addr;
truelight@543: 	Packet *p;
truelight@543: 	NetworkGameList *item;
truelight@543: 
truelight@543: 	// No UDP-socket yet..
truelight@543: 	if (_udp_client_socket == INVALID_SOCKET)
truelight@764: 		if (!NetworkUDPListen(&_udp_client_socket, 0, 0, true))
dominik@738: 			return NULL;
truelight@543: 
truelight@543: 	out_addr.sin_family = AF_INET;
truelight@543: 	out_addr.sin_port = htons(port);
truelight@543: 	out_addr.sin_addr.s_addr = NetworkResolveHost(host);
truelight@543: 
truelight@543: 	// Clear item in gamelist
truelight@543: 	item = NetworkGameListAddItem(inet_addr(inet_ntoa(out_addr.sin_addr)), ntohs(out_addr.sin_port));
truelight@543: 	memset(&item->info, 0, sizeof(item->info));
tron@3550: 	ttd_strlcpy(item->info.server_name, host, lengthof(item->info.server_name));
tron@3550: 	ttd_strlcpy(item->info.hostname, host, lengthof(item->info.hostname));
truelight@543: 	item->online = false;
truelight@543: 
truelight@543: 	// Init the packet
truelight@638: 	p = NetworkSend_Init(PACKET_UDP_CLIENT_FIND_SERVER);
truelight@543: 
truelight@764: 	NetworkSendUDP_Packet(_udp_client_socket, p, &out_addr);
truelight@543: 
truelight@543: 	free(p);
truelight@543: 
truelight@543: 	UpdateNetworkGameWindow(false);
dominik@738: 	return item;
truelight@543: }
truelight@543: 
truelight@765: /* Remove our advertise from the master-server */
truelight@765: void NetworkUDPRemoveAdvertise(void)
truelight@765: {
truelight@765: 	struct sockaddr_in out_addr;
truelight@765: 	Packet *p;
truelight@765: 
truelight@765: 	/* Check if we are advertising */
Darkvater@5568: 	if (!_networking || !_network_server || !_network_udp_server) return;
truelight@765: 
truelight@765: 	/* check for socket */
truelight@765: 	if (_udp_master_socket == INVALID_SOCKET)
truelight@805: 		if (!NetworkUDPListen(&_udp_master_socket, _network_server_bind_ip, 0, false))
truelight@765: 			return;
truelight@765: 
Darkvater@5568: 	DEBUG(net, 1, "[udp] removing advertise from master server");
truelight@765: 
truelight@765: 	/* Find somewhere to send */
truelight@765: 	out_addr.sin_family = AF_INET;
truelight@765: 	out_addr.sin_port = htons(NETWORK_MASTER_SERVER_PORT);
truelight@765: 	out_addr.sin_addr.s_addr = NetworkResolveHost(NETWORK_MASTER_SERVER_HOST);
truelight@765: 
truelight@765: 	/* Send the packet */
truelight@765: 	p = NetworkSend_Init(PACKET_UDP_SERVER_UNREGISTER);
truelight@765: 	/* Packet is: Version, server_port */
truelight@765: 	NetworkSend_uint8(p, NETWORK_MASTER_SERVER_VERSION);
truelight@765: 	NetworkSend_uint16(p, _network_server_port);
truelight@765: 	NetworkSendUDP_Packet(_udp_master_socket, p, &out_addr);
truelight@765: 
truelight@765: 	free(p);
truelight@765: }
truelight@765: 
truelight@668: /* Register us to the master server
truelight@668:      This function checks if it needs to send an advertise */
truelight@716: void NetworkUDPAdvertise(void)
truelight@668: {
truelight@668: 	struct sockaddr_in out_addr;
truelight@668: 	Packet *p;
truelight@668: 
truelight@668: 	/* Check if we should send an advertise */
truelight@668: 	if (!_networking || !_network_server || !_network_udp_server || !_network_advertise)
truelight@668: 		return;
truelight@668: 
truelight@764: 	/* check for socket */
truelight@764: 	if (_udp_master_socket == INVALID_SOCKET)
truelight@805: 		if (!NetworkUDPListen(&_udp_master_socket, _network_server_bind_ip, 0, false))
truelight@764: 			return;
truelight@764: 
peter1138@2861: 	if (_network_need_advertise) {
peter1138@2861: 		_network_need_advertise = false;
peter1138@2861: 		_network_advertise_retries = ADVERTISE_RETRY_TIMES;
peter1138@2861: 	} else {
peter1138@2861: 		/* Only send once every ADVERTISE_NORMAL_INTERVAL ticks */
peter1138@2861: 		if (_network_advertise_retries == 0) {
peter1138@2861: 			if ((_network_last_advertise_frame + ADVERTISE_NORMAL_INTERVAL) > _frame_counter)
peter1138@2861: 				return;
peter1138@2861: 			_network_advertise_retries = ADVERTISE_RETRY_TIMES;
peter1138@2861: 		}
peter1138@2861: 
peter1138@2861: 		if ((_network_last_advertise_frame + ADVERTISE_RETRY_INTERVAL) > _frame_counter)
truelight@764: 			return;
truelight@764: 	}
truelight@764: 
truelight@764: 	_network_advertise_retries--;
peter1138@2861: 	_network_last_advertise_frame = _frame_counter;
truelight@668: 
truelight@668: 	/* Find somewhere to send */
truelight@668: 	out_addr.sin_family = AF_INET;
truelight@668: 	out_addr.sin_port = htons(NETWORK_MASTER_SERVER_PORT);
truelight@668: 	out_addr.sin_addr.s_addr = NetworkResolveHost(NETWORK_MASTER_SERVER_HOST);
truelight@668: 
Darkvater@5568: 	DEBUG(net, 1, "[udp] advertising to master server");
truelight@668: 
truelight@668: 	/* Send the packet */
truelight@668: 	p = NetworkSend_Init(PACKET_UDP_SERVER_REGISTER);
truelight@668: 	/* Packet is: WELCOME_MESSAGE, Version, server_port */
truelight@668: 	NetworkSend_string(p, NETWORK_MASTER_SERVER_WELCOME_MESSAGE);
truelight@668: 	NetworkSend_uint8(p, NETWORK_MASTER_SERVER_VERSION);
truelight@668: 	NetworkSend_uint16(p, _network_server_port);
truelight@764: 	NetworkSendUDP_Packet(_udp_master_socket, p, &out_addr);
truelight@764: 
truelight@668: 	free(p);
truelight@668: }
truelight@668: 
truelight@543: void NetworkUDPInitialize(void)
truelight@543: {
truelight@543: 	_udp_client_socket = INVALID_SOCKET;
truelight@543: 	_udp_server_socket = INVALID_SOCKET;
truelight@764: 	_udp_master_socket = INVALID_SOCKET;
truelight@543: 
truelight@543: 	_network_udp_server = false;
truelight@543: 	_network_udp_broadcast = 0;
truelight@543: }
truelight@543: 
truelight@543: #endif /* ENABLE_NETWORK */