net.tomp2p.upnp
Class Discovery

java.lang.Object
  net.tomp2p.upnp.Discovery

public class Discovery
extends Object

Class to discover an UPNP device on the network.
A multicast socket will be created to discover devices, the binding port for this socket is set to 1901, if this is causing a problem you can use the net.sbbi.upnp.Discovery.bindPort system property to specify another port. The discovery methods only accept matching device description and broadcast message response IP to avoid a security flaw with the protocol. If you are not happy with such behaviour you can set the net.sbbi.upnp.ddos.matchip system property to false to avoid this check.

Version:

1.0

Author:

SuperBonBon

Field Summary

static String	ALL_DEVICES
static int	DEFAULT_MX
static String	DEFAULT_SEARCH
static int	DEFAULT_SSDP_SEARCH_PORT
static int	DEFAULT_TIMEOUT
static int	DEFAULT_TTL
static String	ROOT_DEVICES
static String	SSDP_IP
static int	SSDP_PORT

Constructor Summary

Discovery()

Method Summary

static Collection<RootDevice>	discover() Devices discovering on all network interfaces with default values, all root devices will be searched
static Collection<RootDevice>	discover(int timeOut, int ttl, int mx, String searchTarget) Devices discovering on all network interfaces with a given timeout and a given root device to search, as well as a ttl and mx param
static Collection<RootDevice>	discover(int timeOut, int ttl, int mx, String searchTarget, NetworkInterface ni) Devices discovering with a given timeout and a given root device to search on an given network interface, as well as a ttl and mx param
static Collection<RootDevice>	discover(int timeOut, String searchTarget) Devices discovering on all network interfaces with a given timeout and a given root device to search
static Collection<RootDevice>	discover(String searchTarget) Devices discovering on all network interfaces with a given root device to search
static void	sendSearchMessage(InetAddress src, int ttl, int mx, String searchTarget) Sends an SSDP search message on the network

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ROOT_DEVICES

public static final String ROOT_DEVICES

See Also:

Constant Field Values

ALL_DEVICES

public static final String ALL_DEVICES

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Constant Field Values

DEFAULT_MX

public static final int DEFAULT_MX

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Constant Field Values

DEFAULT_TTL

public static final int DEFAULT_TTL

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Constant Field Values

DEFAULT_TIMEOUT

public static final int DEFAULT_TIMEOUT

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Constant Field Values

DEFAULT_SEARCH

public static final String DEFAULT_SEARCH

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Constant Field Values

DEFAULT_SSDP_SEARCH_PORT

public static final int DEFAULT_SSDP_SEARCH_PORT

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Constant Field Values

SSDP_IP

public static final String SSDP_IP

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Constant Field Values

SSDP_PORT

public static final int SSDP_PORT

See Also:

Constant Field Values

Constructor Detail

Discovery

public Discovery()

Method Detail

discover

public static Collection<RootDevice> discover()
                                       throws IOException

Devices discovering on all network interfaces with default values, all root devices will be searched

Returns:

an array of UPNP Root device or null if nothing found with the default timeout. Null does NOT means that no UPNP device is available on the network. It only means that for this default timeout no devices responded or that effectively no devices are available at all.

Throws:

IOException - if some IOException occurs during discovering

discover

public static Collection<RootDevice> discover(String searchTarget)
                                       throws IOException

Devices discovering on all network interfaces with a given root device to search

Parameters:

searchTarget - the device URI to search

Returns:

an array of UPNP Root device that matches the search or null if nothing found with the default timeout. Null does NOT means that no UPNP device is available on the network. It only means that for this given timeout no devices responded or that effectively no devices are available at all.

Throws:

IOException - if some IOException occurs during discovering

discover

public static Collection<RootDevice> discover(int timeOut,
                                              String searchTarget)
                                       throws IOException

Devices discovering on all network interfaces with a given timeout and a given root device to search

Parameters:

timeOut - the time allowed for a device to give a response

searchTarget - the device URI to search

Returns:

an array of UPNP Root device that matches the search or null if nothing found with the given timeout. Null does NOT means that no UPNP device is available on the network. It only means that for this given timeout no devices responded or that effectively no devices are available at all.

Throws:

IOException - if some IOException occurs during discovering

discover

public static Collection<RootDevice> discover(int timeOut,
                                              int ttl,
                                              int mx,
                                              String searchTarget)
                                       throws IOException

Devices discovering on all network interfaces with a given timeout and a given root device to search, as well as a ttl and mx param

Parameters:

timeOut - the timeout for the a device to give a reponse

ttl - the UDP socket packets time to live

mx - discovery message mx http header field value

searchTarget - the device URI to search

Returns:

an array of UPNP Root device that matches the search or null if nothing found within the given timeout. Null return does NOT means that no UPNP device is available on the network. It only means that for this given timeout no devices responded or that effectively no devices are available at all.

Throws:

IOException - if some IOException occurs during discovering

discover

public static Collection<RootDevice> discover(int timeOut,
                                              int ttl,
                                              int mx,
                                              String searchTarget,
                                              NetworkInterface ni)
                                       throws IOException

Devices discovering with a given timeout and a given root device to search on an given network interface, as well as a ttl and mx param

Parameters:

timeOut - the timeout for the a device to give a reponse

ttl - the UDP socket packets time to live

mx - discovery message mx http header field value

searchTarget - the device URI to search

ni - the networkInterface where to search devices, null to lookup all interfaces

Returns:

an array of UPNP Root device that matches the search or null if nothing found within the given timeout. Null return does NOT means that no UPNP device is available on the network. It only means that for this given timeout no devices responded or that effectively no devices are available at all.

Throws:

IOException - if some IOException occurs during discovering

sendSearchMessage

public static void sendSearchMessage(InetAddress src,
                                     int ttl,
                                     int mx,
                                     String searchTarget)
                              throws IOException

Sends an SSDP search message on the network

Parameters:

src - the sender ip

ttl - the time to live

mx - the mx field

searchTarget - the search target

Throws:

IOException - if some IO errors occurs during search