(svn r15157) -Codechange: wrap the hostname/ip and port into a single structure so we can pass either one of them and not convert an ip to a string and then back again.

src/console_cmds.cpp

@@ -692,7 +692,7 @@ DEF_CONSOLE_CMD(ConNetworkConnect)
 		IConsolePrintF(CC_DEFAULT, "    port: %s", port);
 	}
 
-	NetworkClientConnectGame(ip, rport);
+	NetworkClientConnectGame(NetworkAddress(ip, rport));
 
 	return true;
 }

src/network/network.cpp

@@ -451,12 +451,12 @@ void NetworkCloseClient(NetworkClientSocket *cs)
 }
 
 // A client wants to connect to a server
-static bool NetworkConnect(const char *hostname, int port)
+static bool NetworkConnect(NetworkAddress address)
 {
 	SOCKET s;
 	struct sockaddr_in sin;
 
-	DEBUG(net, 1, "Connecting to %s %d", hostname, port);
+	DEBUG(net, 1, "Connecting to %s %d", address.GetHostname(), address.GetPort());
 
 	s = socket(AF_INET, SOCK_STREAM, 0);
 	if (s == INVALID_SOCKET) {
@@ -467,8 +467,8 @@ static bool NetworkConnect(const char *hostname, int port)
 	if (!SetNoDelay(s)) DEBUG(net, 1, "Setting TCP_NODELAY failed");
 
 	sin.sin_family = AF_INET;
-	sin.sin_addr.s_addr = NetworkResolveHost(hostname);
-	sin.sin_port = htons(port);
+	sin.sin_addr.s_addr = address.GetIP();
+	sin.sin_port = htons(address.GetIP());
 	_network_last_host_ip = sin.sin_addr.s_addr;
 
 	/* We failed to connect for which reason what so ever */
@@ -664,7 +664,7 @@ static void NetworkInitialize()
 // Query a server to fetch his game-info
 //  If game_info is true, only the gameinfo is fetched,
 //   else only the client_info is fetched
-void NetworkTCPQueryServer(const char *host, unsigned short port)
+void NetworkTCPQueryServer(NetworkAddress address)
 {
 	if (!_network_available) return;
 
@@ -672,7 +672,7 @@ void NetworkTCPQueryServer(const char *host, unsigned short port)
 	NetworkInitialize();
 
 	// Try to connect
-	_networking = NetworkConnect(host, port);
+	_networking = NetworkConnect(address);
 
 	// We are connected
 	if (_networking) {
@@ -701,7 +701,7 @@ void NetworkAddServer(const char *b)
 		ParseConnectionString(&company, &port, host);
 		if (port != NULL) rport = atoi(port);
 
-		NetworkUDPQueryServer(host, rport, true);
+		NetworkUDPQueryServer(NetworkAddress(host, rport), true);
 	}
 }
 
@@ -727,20 +727,20 @@ void NetworkRebuildHostList()
 }
 
 // Used by clients, to connect to a server
-void NetworkClientConnectGame(const char *host, uint16 port)
+void NetworkClientConnectGame(NetworkAddress address)
 {
 	if (!_network_available) return;
 
-	if (port == 0) return;
+	if (address.GetPort() == 0) return;
 
-	strecpy(_settings_client.network.last_host, host, lastof(_settings_client.network.last_host));
-	_settings_client.network.last_port = port;
+	strecpy(_settings_client.network.last_host, address.GetHostname(), lastof(_settings_client.network.last_host));
+	_settings_client.network.last_port = address.GetPort();
 
 	NetworkDisconnect();
 	NetworkInitialize();
 
 	// Try to connect
-	_networking = NetworkConnect(host, port);
+	_networking = NetworkConnect(address);
 
 	// We are connected
 	if (_networking) {
@@ -1073,13 +1073,13 @@ static void NetworkGenerateUniqueId()
 	snprintf(_settings_client.network.network_id, sizeof(_settings_client.network.network_id), "%s", hex_output);
 }
 
-void NetworkStartDebugLog(const char *hostname, uint16 port)
+void NetworkStartDebugLog(NetworkAddress address)
 {
 	extern SOCKET _debug_socket;  // Comes from debug.c
 	SOCKET s;
 	struct sockaddr_in sin;
 
-	DEBUG(net, 0, "Redirecting DEBUG() to %s:%d", hostname, port);
+	DEBUG(net, 0, "Redirecting DEBUG() to %s:%d", address.GetHostname(), address.GetPort());
 
 	s = socket(AF_INET, SOCK_STREAM, 0);
 	if (s == INVALID_SOCKET) {
@@ -1090,11 +1090,11 @@ void NetworkStartDebugLog(const char *hostname, uint16 port)
 	if (!SetNoDelay(s)) DEBUG(net, 1, "Setting TCP_NODELAY failed");
 
 	sin.sin_family = AF_INET;
-	sin.sin_addr.s_addr = NetworkResolveHost(hostname);
-	sin.sin_port = htons(port);
+	sin.sin_addr.s_addr = address.GetIP();
+	sin.sin_port = htons(address.GetPort());
 
 	if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) != 0) {
-		DEBUG(net, 0, "Failed to redirection DEBUG() to %s:%d", hostname, port);
+		DEBUG(net, 0, "Failed to redirection DEBUG() to %s:%d", address.GetHostname(), address.GetIP());
 		return;
 	}
 
@@ -1154,6 +1154,24 @@ bool IsNetworkCompatibleVersion(const char *other)
 	return strncmp(_openttd_revision, other, NETWORK_REVISION_LENGTH - 1) == 0;
 }
 
+const char *NetworkAddress::GetHostname() const
+{
+	if (this->hostname != NULL) return this->hostname;
+
+	in_addr addr;
+	addr.s_addr = this->ip;
+	return inet_ntoa(addr);
+}
+
+uint32 NetworkAddress::GetIP()
+{
+	if (!this->resolved) {
+		this->ip = NetworkResolveHost(this->hostname);
+		this->resolved = true;
+	}
+	return this->ip;
+}
+
 #endif /* ENABLE_NETWORK */
 
 /* NOTE: this variable needs to be always available */

src/network/network_func.h

@@ -32,11 +32,11 @@ void NetworkGameLoop();
 void NetworkUDPGameLoop();
 void NetworkUDPCloseAll();
 void ParseConnectionString(const char **company, const char **port, char *connection_string);
-void NetworkStartDebugLog(const char *hostname, uint16 port);
+void NetworkStartDebugLog(NetworkAddress address);
 void NetworkPopulateCompanyStats(NetworkCompanyStats *stats);
 
 void NetworkUpdateClientInfo(ClientID client_id);
-void NetworkClientConnectGame(const char *host, uint16 port);
+void NetworkClientConnectGame(NetworkAddress address);
 void NetworkClientSendRcon(const char *password, const char *command);
 void NetworkClientSendChat(NetworkAction action, DestType type, int dest, const char *msg, int64 data = 0);
 void NetworkClientSetPassword(const char *password);

src/network/network_gamelist.cpp

@@ -96,18 +96,13 @@ void NetworkGameListRequery()
 	if (++requery_cnt < REQUERY_EVERY_X_GAMELOOPS) return;
 	requery_cnt = 0;
 
-	struct in_addr ip;
-	NetworkGameList *item;
-
-	for (item = _network_game_list; item != NULL; item = item->next) {
+	for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
 		item->retries++;
 		if (item->retries < REFRESH_GAMEINFO_X_REQUERIES && (item->online || item->retries >= MAX_GAME_LIST_REQUERY_COUNT)) continue;
 
-		ip.s_addr = item->ip;
-
 		/* item gets mostly zeroed by NetworkUDPQueryServer */
 		uint8 retries = item->retries;
-		NetworkUDPQueryServer(inet_ntoa(ip), item->port);
+		NetworkUDPQueryServer(NetworkAddress(item->ip, item->port));
 		item->retries = (retries >= REFRESH_GAMEINFO_X_REQUERIES) ? 0 : retries;
 	}
 }

src/network/network_gui.cpp

@@ -558,7 +558,7 @@ public:
 				break;
 
 			case NGWW_REFRESH: // Refresh
-				if (this->server != NULL) NetworkUDPQueryServer(this->server->info.hostname, this->server->port);
+				if (this->server != NULL) NetworkUDPQueryServer(NetworkAddress(this->server->info.hostname, this->server->port));
 				break;
 
 			case NGWW_NEWGRF: // NewGRF Settings
@@ -1313,22 +1313,22 @@ struct NetworkLobbyWindow : public Window {
 			case NLWW_JOIN:     // Join company
 				/* Button can be clicked only when it is enabled */
 				_network_playas = this->company;
-				NetworkClientConnectGame(_settings_client.network.last_host, _settings_client.network.last_port);
+				NetworkClientConnectGame(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port));
 				break;
 
 			case NLWW_NEW:      // New company
 				_network_playas = COMPANY_NEW_COMPANY;
-				NetworkClientConnectGame(_settings_client.network.last_host, _settings_client.network.last_port);
+				NetworkClientConnectGame(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port));
 				break;
 
 			case NLWW_SPECTATE: // Spectate game
 				_network_playas = COMPANY_SPECTATOR;
-				NetworkClientConnectGame(_settings_client.network.last_host, _settings_client.network.last_port);
+				NetworkClientConnectGame(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port));
 				break;
 
 			case NLWW_REFRESH:  // Refresh
-				NetworkTCPQueryServer(_settings_client.network.last_host, _settings_client.network.last_port); // company info
-				NetworkUDPQueryServer(_settings_client.network.last_host, _settings_client.network.last_port); // general data
+				NetworkTCPQueryServer(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port)); // company info
+				NetworkUDPQueryServer(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port)); // general data
 				/* Clear the information so removed companies don't remain */
 				memset(this->company_info, 0, sizeof(company_info));
 				break;
@@ -1381,8 +1381,8 @@ static void ShowNetworkLobbyWindow(NetworkGameList *ngl)
 {
 	DeleteWindowById(WC_NETWORK_WINDOW, 0);
 
-	NetworkTCPQueryServer(_settings_client.network.last_host, _settings_client.network.last_port); // company info
-	NetworkUDPQueryServer(_settings_client.network.last_host, _settings_client.network.last_port); // general data
+	NetworkTCPQueryServer(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port)); // company info
+	NetworkUDPQueryServer(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port)); // general data
 
 	new NetworkLobbyWindow(&_network_lobby_window_desc, ngl);
 }

src/network/network_internal.h

@@ -122,7 +122,7 @@ extern uint16 _network_udp_broadcast;
 
 extern uint8 _network_advertise_retries;
 
-void NetworkTCPQueryServer(const char *host, unsigned short port);
+void NetworkTCPQueryServer(NetworkAddress address);
 
 void NetworkAddServer(const char *b);
 void NetworkRebuildHostList();

src/network/network_type.h

@@ -11,6 +11,7 @@
 #include "../economy_type.h"
 #include "core/config.h"
 #include "core/game.h"
+#include "core/os_abstraction.h"
 
 enum {
 	/** How many clients can we have */
@@ -114,5 +115,95 @@ enum NetworkErrorCode {
 	NETWORK_ERROR_FULL,
 };
 
+/**
+ * Wrapper for (un)resolved network addresses; there's no reason to transform
+ * a numeric IP to a string and then back again to pass it to functions. It
+ * furthermore allows easier delaying of the hostname lookup.
+ */
+class NetworkAddress {
+private:
+	bool resolved;  ///< Has the IP address been resolved
+	char *hostname; ///< The hostname, NULL if there isn't one
+	uint32 ip;      ///< The resolved IP address
+	uint16 port;    ///< The port associated with the address
+
+public:
+	/**
+	 * Create a network address based on a resolved IP and port
+	 * @param ip the resolved ip
+	 * @param port the port
+	 */
+	NetworkAddress(in_addr_t ip, uint16 port) :
+		resolved(true),
+		hostname(NULL),
+		ip(ip),
+		port(port)
+	{
+	}
+
+	/**
+	 * Create a network address based on a unresolved host and port
+	 * @param ip the unresolved hostname
+	 * @param port the port
+	 */
+	NetworkAddress(const char *hostname, uint16 port) :
+		resolved(false),
+		hostname(strdup(hostname)),
+		ip(0),
+		port(port)
+	{
+	}
+
+	/**
+	 * Make a clone of another address
+	 * @param address the address to clone
+	 */
+	NetworkAddress(const NetworkAddress &address) :
+		resolved(address.resolved),
+		hostname(address.hostname == NULL ? NULL : strdup(address.hostname)),
+		ip(address.ip),
+		port(address.port)
+	{
+	}
+
+	/** Clean up our mess */
+	~NetworkAddress()
+	{
+		free(hostname);
+	}
+
+	/**
+	 * Get the hostname; in case it wasn't given the
+	 * IPv4 dotted representation is given.
+	 * @return the hostname
+	 */
+	const char *GetHostname() const;
+
+	/**
+	 * Get the IP address. If the IP has not been resolved yet this will resolve
+	 * it possibly blocking this function for a while
+	 * @return the IP address
+	 */
+	uint32 GetIP();
+
+	/**
+	 * Get the port
+	 * @return the port
+	 */
+	uint16 GetPort() const
+	{
+		return this->port;
+	}
+
+	/**
+	 * Check whether the IP address has been resolved already
+	 * @return true iff the port has been resolved
+	 */
+	bool IsResolved() const
+	{
+		return this->resolved;
+	}
+};
+
 #endif /* ENABLE_NETWORK */
 #endif /* NETWORK_TYPE_H */

src/network/network_udp.cpp

@@ -276,27 +276,22 @@ DEF_UDP_RECEIVE_COMMAND(Client, PACKET_UDP_SERVER_RESPONSE)
 
 DEF_UDP_RECEIVE_COMMAND(Client, PACKET_UDP_MASTER_RESPONSE_LIST)
 {
-	int i;
-	struct in_addr ip;
-	uint16 port;
-	uint8 ver;
-
 	/* packet begins with the protocol version (uint8)
 	 * then an uint16 which indicates how many
 	 * ip:port pairs are in this packet, after that
 	 * an uint32 (ip) and an uint16 (port) for each pair
 	 */
 
-	ver = p->Recv_uint8();
+	uint8 ver = p->Recv_uint8();
 
 	if (ver == 1) {
-		for (i = p->Recv_uint16(); i != 0 ; i--) {
-			ip.s_addr = TO_LE32(p->Recv_uint32());
-			port = p->Recv_uint16();
+		for (int i = p->Recv_uint16(); i != 0 ; i--) {
+			uint32 ip = TO_LE32(p->Recv_uint32());
+			uint16 port = p->Recv_uint16();
 
 			/* Somehow we reached the end of the packet */
 			if (this->HasClientQuit()) return;
-			NetworkUDPQueryServer(inet_ntoa(ip), port);
+			NetworkUDPQueryServer(NetworkAddress(ip, port));
 		}
 	}
 }
@@ -425,7 +420,7 @@ void NetworkUDPSearchGame()
 	_network_udp_broadcast = 300; // Stay searching for 300 ticks
 }
 
-void NetworkUDPQueryServer(const char *host, unsigned short port, bool manually)
+void NetworkUDPQueryServer(NetworkAddress address, bool manually)
 {
 	struct sockaddr_in out_addr;
 	NetworkGameList *item;
@@ -436,17 +431,17 @@ void NetworkUDPQueryServer(const char *host, unsigned short port, bool manually)
 	}
 
 	out_addr.sin_family = AF_INET;
-	out_addr.sin_port = htons(port);
-	out_addr.sin_addr.s_addr = NetworkResolveHost(host);
+	out_addr.sin_port = htons(address.GetPort());
+	out_addr.sin_addr.s_addr = address.GetIP();
 
 	// Clear item in gamelist
-	item = NetworkGameListAddItem(inet_addr(inet_ntoa(out_addr.sin_addr)), ntohs(out_addr.sin_port));
+	item = NetworkGameListAddItem(address.GetIP(), address.GetPort());
 	if (item == NULL) return;
 
 	if (StrEmpty(item->info.server_name)) {
 		memset(&item->info, 0, sizeof(item->info));
-		strecpy(item->info.server_name, host, lastof(item->info.server_name));
-		strecpy(item->info.hostname, host, lastof(item->info.hostname));
+		strecpy(item->info.server_name, address.GetHostname(), lastof(item->info.server_name));
+		strecpy(item->info.hostname, address.GetHostname(), lastof(item->info.hostname));
 		item->online = false;
 	}
 	item->manually = manually;

src/network/network_udp.h

@@ -10,7 +10,7 @@
 void NetworkUDPInitialize();
 void NetworkUDPSearchGame();
 void NetworkUDPQueryMasterServer();
-void NetworkUDPQueryServer(const char *host, unsigned short port, bool manually = false);
+void NetworkUDPQueryServer(NetworkAddress address, bool manually = false);
 void NetworkUDPAdvertise();
 void NetworkUDPRemoveAdvertise();
 void NetworkUDPShutdown();

src/openttd.cpp

@@ -681,7 +681,7 @@ int ttd_main(int argc, char *argv[])
 		ParseConnectionString(&not_used, &port, debuglog_conn);
 		if (port != NULL) rport = atoi(port);
 
-		NetworkStartDebugLog(debuglog_conn, rport);
+		NetworkStartDebugLog(NetworkAddress(debuglog_conn, rport));
 	}
 #endif /* ENABLE_NETWORK */
 
@@ -728,7 +728,7 @@ int ttd_main(int argc, char *argv[])
 
 			LoadIntroGame();
 			_switch_mode = SM_NONE;
-			NetworkClientConnectGame(network_conn, rport);
+			NetworkClientConnectGame(NetworkAddress(network_conn, rport));
 		}
 	}
 #endif /* ENABLE_NETWORK */
@@ -1219,7 +1219,7 @@ void GameLoop()
 		if (_network_reconnect > 0 && --_network_reconnect == 0) {
 			/* This means that we want to reconnect to the last host
 			 * We do this here, because it means that the network is really closed */
-			NetworkClientConnectGame(_settings_client.network.last_host, _settings_client.network.last_port);
+			NetworkClientConnectGame(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port));
 		}
 		/* Singleplayer */
 		StateGameLoop();