## GUPnPSimpleIgd

GUPnPSimpleIgd — A simple class to map ports on UPnP routers

## Synopsis

                        GUPnPSimpleIgd;
    struct              GUPnPSimpleIgdClass;
    #define             GUPNP_SIMPLE_IGD_ERROR
    #define             GUPNP_TYPE_SIMPLE_IGD_ERROR
    enum                GUPnPSimpleIgdError;
    GUPnPSimpleIgd *    gupnp_simple_igd_new                (void);
    void                gupnp_simple_igd_add_port           (GUPnPSimpleIgd *self,
                                                             const gchar *protocol,
                                                             guint16 external_port,
                                                             const gchar *local_ip,
                                                             guint16 local_port,
                                                             guint32 lease_duration,
                                                             const gchar *description);
    void                gupnp_simple_igd_remove_port        (GUPnPSimpleIgd *self,
                                                             const gchar *protocol,
                                                             guint external_port);
    gboolean            gupnp_simple_igd_delete_all_mappings
                                                            (GUPnPSimpleIgd *self);

## Object Hierarchy

      GObject
       +----GUPnPSimpleIgd
             +----GUPnPSimpleIgdThread

## Properties

      "main-context"             gpointer              : Read

## Signals

      "error-mapping-port"                             : Has Details
      "mapped-external-port"                           : Run Last

## Description

This simple class allows applications to map ports on UPnP routers. It implements the basic functionalities to map ports to external ports. It also allows implementations to know the external port from the router's perspective.

Every call to this object, including its creation, MUST always be done using the same thread local GMainContext pushed via `g_main_context_push_thread_default()`;

## Details

### GUPnPSimpleIgd

    typedef struct _GUPnPSimpleIgd GUPnPSimpleIgd;

All members are private, access them using methods and properties

### struct GUPnPSimpleIgdClass

    struct GUPnPSimpleIgdClass {
      GObjectClass parent_class;

      /*virtual functions */

      void (*add_port) (GUPnPSimpleIgd *self,
          const gchar *protocol,
          guint16 external_port,
          const gchar *local_ip,
          guint16 local_port,
          guint32 lease_duration,
          const gchar *description);

      void (*remove_port) (GUPnPSimpleIgd *self,
          const gchar *protocol,
          guint external_port);
    };

The Raw UDP component transmitter class

GObjectClass `parent_class`; | Our parent
`add_port` () | An implementation of the add_port function
`remove_port` () | An implementation of the delete_port function

### GUPNP_SIMPLE_IGD_ERROR

    #define GUPNP_SIMPLE_IGD_ERROR (gupnp_simple_igd_error_quark ())

### GUPNP_TYPE_SIMPLE_IGD_ERROR

    #define GUPNP_TYPE_SIMPLE_IGD_ERROR (gupnp_simple_igd_error_get_type())

### enum GUPnPSimpleIgdError

    typedef enum {
      GUPNP_SIMPLE_IGD_ERROR_EXTERNAL_ADDRESS,
    } GUPnPSimpleIgdError;

Errors coming out of the GUPnPSimpleIGD object.

`GUPNP_SIMPLE_IGD_ERROR_EXTERNAL_ADDRESS` | Error getting the external address of the router

### gupnp_simple_igd_new ()

    GUPnPSimpleIgd *    gupnp_simple_igd_new                (void);

This creates a new GUPnpSimpleIgd object using the special GMainContext

Returns : | a new GUPnPSimpleIgd

### gupnp_simple_igd_add_port ()

    void                gupnp_simple_igd_add_port           (GUPnPSimpleIgd *self,
                                                             const gchar *protocol,
                                                             guint16 external_port,
                                                             const gchar *local_ip,
                                                             guint16 local_port,
                                                             guint32 lease_duration,
                                                             const gchar *description);

This adds a port to the router's forwarding table. The mapping will be automatically refreshed by this object until it is either removed with `gupnp_simple_igd_remove_port()` or the object disapears.

If there is a problem, the "error-mapping-port" signal will be emitted. If a router is found and a port is mapped correctly, "mapped-external-port" will be emitted. These signals may be emitted multiple times if there are multiple routers present.

`self` : | The GUPnPSimpleIgd object
`protocol` : | the protocol "UDP" or "TCP"
`external_port` : | The port to try to open on the external device, 0 means to try a random port if the same port as the local port is already taken
`local_ip` : | The IP address to forward packets to (most likely the local ip address)
`local_port` : | The local port to forward packets to
`lease_duration` : | The duration of the lease (it will be auto-renewed before it expires). This is in seconds.
`description` : | The description that will appear in the router's table

### gupnp_simple_igd_remove_port ()

    void                gupnp_simple_igd_remove_port        (GUPnPSimpleIgd *self,
                                                             const gchar *protocol,
                                                             guint external_port);

This tries to remove a port entry from the routers that was previously added with `gupnp_simple_igd_add_port()`. There is no indicated of success or failure it is a best effort mechanism. If it fails, the bindings will disapears after the lease duration set when the port where added.

`self` : | The GUPnPSimpleIgd object
`protocol` : | the protocol "UDP" or "TCP" as given to `gupnp_simple_igd_add_port()`
`external_port` : | The port to try to open on the external device as given to `gupnp_simple_igd_add_port()`

### gupnp_simple_igd_delete_all_mappings ()

    gboolean            gupnp_simple_igd_delete_all_mappings
                                                            (GUPnPSimpleIgd *self);

Removes all mappings and prevents other from being formed Should only be called by the dispose function of subclasses

`self` : | a GUPnPSimpleIgd
Returns : | `TRUE` if the object can be disposed, `FALSE` otherwise

## Property Details

### The `"main-context"` property

      "main-context"             gpointer              : Read

This GMainContext will be used for all async activities.

## Signal Details

### The `"error-mapping-port"` signal

    void                user_function                      (GUPnPSimpleIgd *self,
                                                            gpointer        error,
                                                            gchar          *proto,
                                                            guint           external_port,
                                                            gchar          *local_ip,
                                                            guint           local_port,
                                                            gchar          *description,
                                                            gpointer        user_data)          : Has Details

This means that mapping a port on a specific IGD has failed (it may still succeed on other IGDs on the network).

`self` : | GUPnPSimpleIgd that emitted the signal
`error` : | a GError
`proto` : | The requested protocol
`external_port` : | the external port requested in `gupnp_simple_igd_add_port()`
`local_ip` : | internal ip this is forwarded to
`local_port` : | the local port
`description` : | the passed description
`user_data` : | user data set when the signal handler was connected.

### The `"mapped-external-port"` signal

    void                user_function                      (GUPnPSimpleIgd *self,
                                                            gchar          *proto,
                                                            gchar          *external_ip,
                                                            gchar          *replaces_external_ip,
                                                            guint           external_port,
                                                            gchar          *local_ip,
                                                            guint           local_port,
                                                            gchar          *description,
                                                            gpointer        user_data)                 : Run Last

This signal means that an IGD has been found that that adding a port mapping has succeeded.

`self` : | GUPnPSimpleIgd that emitted the signal
`proto` : | the requested protocol ("UDP" or "TCP")
`external_ip` : | the external IP
`replaces_external_ip` : | if this mapping replaces another mapping, this is the old external IP
`external_port` : | the external port that was allocated
`local_ip` : | IP address that the router should forward the packets to. It could be the address of another machine on the local network
`local_port` : | the local port
`description` : | the user's selected description
`user_data` : | user data set when the signal handler was connected.