// The amount of clients connected

static byte _network_clients_connected = 0;

// The index counter for new clients (is never decreased)

static uint16 _network_client_index = NETWORK_SERVER_INDEX + 1;

// Function that looks up the CI for a given client-index

NetworkClientInfo *NetworkFindClientInfoFromIndex(uint16 client_index)

{

	NetworkClientInfo *ci;

	for (ci = _network_client_info; ci != &_network_client_info[MAX_CLIENT_INFO]; ci++)

			return ci;

	return NULL;

}

// Function that looks up the CS for a given client-index

{

	for (cs = _clients; cs != &_clients[MAX_CLIENT_INFO]; cs++)

		if (cs->index == client_index)

			return cs;

	return NULL;

}

// NetworkGetClientName is a server-safe function to get the name of the client

//  if the user did not send it yet, Client #<no> is used.

{

	NetworkClientInfo *ci = DEREF_CLIENT_INFO(cs);

	if (ci->client_name[0] == '\0')

		snprintf(client_name, size, "Client #%d", cs->index);

	else

		snprintf(client_name, size, "%s", ci->client_name);

			AddTextMessage(color, duration, "[All] %s: %s", name, buf);

			break;

	}

}

// Calculate the frame-lag of a client

{

	int lag = cs->last_frame_server - cs->last_frame;

	// This client has missed his ACK packet after 1 DAY_TICKS..

	//  so we increase his lag for every frame that passes!

	// The packet can be out by a max of _net_frame_freq

	if (cs->last_frame_server + DAY_TICKS + _network_frame_freq < _frame_counter)

void ServerStartError(char *error) {

	DEBUG(net, 0)("[NET] Server could not start network: %s",error);

	NetworkError(STR_NETWORK_ERR_SERVER_START);

}

	// First, send a CLIENT_ERROR to the server, so he knows we are

	//  disconnection (and why!)

	NetworkErrorCode errorno;

	// We just want to close the connection..

	if (res == NETWORK_RECV_STATUS_CLOSE_QUERY) {

		cs->quited = true;

		_networking = false;

		DeleteWindowById(WC_NETWORK_STATUS_WINDOW, 0);

		return;

	}

		// Dequeue all commands before closing the socket

		NetworkSend_Packets(DEREF_CLIENT(0));

	}

	_switch_mode = SM_MENU;

	_networking = false;

}

// Find all IP-aliases for this host

{

	int i, last;

#if defined(BEOS_NET_SERVER) /* doesn't have neither getifaddrs or net/if.h */

	/* Based on Andrew Bachmann's netstat+.c. Big thanks to him! */

	int _netstat(int fd, char **output, int verbose);

		}

	}

}

// Creates a new client from a socket

//   Used both by the server and the client

{

	NetworkClientInfo *ci;

	byte client_no;

	client_no = 0;

	if (_network_server) {

	}

	return cs;

}

// Close a connection

{

	NetworkClientInfo *ci;

	// Socket is already dead

	if (cs->socket == INVALID_SOCKET) return;

	DEBUG(net, 1) ("[NET] Closed client connection");

	if (!cs->quited && _network_server && cs->status > STATUS_INACTIVE) {

		// We did not receive a leave message from this client...

		NetworkErrorCode errorno = NETWORK_ERROR_CONNECTION_LOST;

		char str1[100], str2[100];

		char client_name[NETWORK_NAME_LENGTH];

		NetworkGetClientName(client_name, sizeof(client_name), cs);

		GetString(str1, STR_NETWORK_ERR_LEFT);

		GetString(str2, STR_NETWORK_ERR_CLIENT_GENERAL + errorno);

	cs->socket = INVALID_SOCKET;

	cs->status = STATUS_INACTIVE;

	cs->index = NETWORK_EMPTY_INDEX;

	ci->client_index = NETWORK_EMPTY_INDEX;

}

// A client wants to connect to a server

{

	SOCKET s;

	struct sockaddr_in sin;

	DEBUG(net, 1) ("[NET] Connecting to %s %d", hostname, port);

		if (ioctlsocket(s, FIONBIO, &blocking) != 0)

		#endif

			DEBUG(net, 0)("[NET] Setting non-blocking failed"); /* XXX should this be an error? */

	}

	// in client mode, only the first client field is used. it's pointing to the server.

	ShowJoinStatusWindow();

	memcpy(&network_tmp_patches, &_patches, sizeof(_patches));

	return true;

// For the server, to accept new clients

static void NetworkAcceptClients(void)

{

	struct sockaddr_in sin;

	SOCKET s;

#ifndef __MORPHOS__

	int sin_len;

#else

	LONG sin_len; // for some reason we need a 'LONG' under MorphOS

#endif

		// set nodelay

		#if !defined(BEOS_NET_SERVER) // not implemented on BeOS net_server...

		// The (const char*) cast is needed for windows!!

		{int b = 1; setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (const char*)&b, sizeof(b));}

		#endif

		if (cs == NULL) {

			// no more clients allowed?

			// Send to the client that we are full!

			Packet *p = NetworkSend_Init(PACKET_SERVER_FULL);

			p->buffer[0] = p->size & 0xFF;

			ci->client_ip = sin.sin_addr.s_addr;

		}

	}

}

// Set up the listen socket for the server

{

	SOCKET ls;

	struct sockaddr_in sin;

	int port;

	port = _network_server_port;

	_listensocket = ls;

	return true;

}

// Close all current connections

{

	FOR_ALL_CLIENTS(cs) {

		if (!_network_server) {

			SEND_COMMAND(PACKET_CLIENT_QUIT)("leaving");

			NetworkSend_Packets(cs);

		}

	}

	if (_network_server) {

		// We are a server, also close the listensocket

		closesocket(_listensocket);

		_listensocket = INVALID_SOCKET;

		DEBUG(net, 1) ("[NET] Closed listener");

		NetworkUDPClose();

	}

}

// Inits the network (cleans sockets and stuff)

{

	uint i;

	_local_command_queue = NULL;

	// Clean all client-sockets

	memset(_clients, 0, sizeof(_clients));

	NetworkUDPInitialize();

	// add all servers from the config file to our list

	for (i=0; i != lengthof(_network_server_list); i++) {

		if (_network_server_list[i] == NULL) break;

	}

}

// 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

	// No networking, close everything down again

	NetworkDisconnect();

}

// validates an address entered as a string and adds the server to

// the list

{

	if (*b != '\0') {

		const byte *port = NULL;

		const byte *player = NULL;

		uint16 rport;

		ttd_strlcpy(_network_default_ip, b, lengthof(_network_default_ip));

		rport = NETWORK_DEFAULT_PORT;

		if (player != NULL) _network_playas = atoi(player);

		if (port != NULL) rport = atoi(port);

	}

}

// Used by clients, to connect to a server

bool NetworkClientConnectGame(const byte* host, unsigned short port)

{

		NetworkError(STR_NETWORK_ERR_NOCONNECTION);

	}

	return _networking;

}

{

	NetworkClientInfo *ci;

	ttd_strlcpy(_network_game_info.server_name, _network_server_name, sizeof(_network_game_info.server_name));

	if (_network_game_info.server_name[0] == '\0')

		snprintf(_network_game_info.server_name, sizeof(_network_game_info.server_name), "Unnamed Server");

// The server is rebooting...

// The only difference with NetworkDisconnect, is the packets that is sent

void NetworkReboot(void)

{

	if (_network_server) {

		FOR_ALL_CLIENTS(cs) {

			SEND_COMMAND(PACKET_SERVER_NEWGAME)(cs);

			NetworkSend_Packets(cs);

		}

	}

}

// We want to disconnect from the host/clients

void NetworkDisconnect(void)

{

	if (_network_server) {

		FOR_ALL_CLIENTS(cs) {

			SEND_COMMAND(PACKET_SERVER_SHUTDOWN)(cs);

			NetworkSend_Packets(cs);

		}

	}

	_networking = false;

	_network_server = false;

}

// Receives something from the network

{

	int n;

	fd_set read_fd, write_fd;

	struct timeval tv;

	FD_ZERO(&read_fd);

	FD_ZERO(&write_fd);

	return true;

}

// This sends all buffered commands (if possible)

static void NetworkSend(void)

{

	FOR_ALL_CLIENTS(cs) {

		if (cs->writable) {

			NetworkSend_Packets(cs);

			if (cs->status == STATUS_MAP) {

				// This client is in the middle of a map-send, call the function for that

			}

		}

	}

}

// Handle the local-command-queue

{

	if (_local_command_queue != NULL) {

		CommandPacket *cp;

		CommandPacket *cp_prev;

		cp = _local_command_queue;

				cp = cp->next;

			}

		}

	}

}

{

	_frame_counter++;

	NetworkHandleLocalQueue();

	StateGameLoop();

		}

	}

	NetworkSend();

}

{

	md5_state_t state;

	md5_byte_t digest[16];

	char hex_output[16*2 + 1];

	char coding_string[NETWORK_NAME_LENGTH];

	int di;