Port Channel

Port Channel — private communication channel

Stability Level

Stable, unless otherwise indicated

Functions

void spice_port_event ()
void spice_port_write_async ()
gssize spice_port_write_finish ()

Properties

gchar * port-name Read
gboolean port-opened Read

Signals

void port-data Run Last
void port-event Run Last

Types and Values

struct SpicePortChannel
struct SpicePortChannelClass

Object Hierarchy

    GObject
    ╰── SpiceChannel
        ╰── SpicePortChannel
            ╰── SpiceWebdavChannel

Includes

#include <spice-client.h>

Description

A Spice port channel carry arbitrary data between the Spice client and the Spice server. It may be used to provide additional services on top of a Spice connection. For example, a channel can be associated with the qemu monitor for the client to interact with it, just like any qemu chardev. Or it may be used with various protocols, such as the Spice Controller.

A port kind is identified simply by a fqdn, such as org.qemu.monitor, org.spice.spicy.test or org.ovirt.controller...

Once connected and initialized, the client may read the name of the port via SpicePortChannel:port-name.

When the other end of the port is ready, SpicePortChannel:port-opened is set to TRUE and you can start receiving data via the signal SpicePortChannel::port-data, or sending data via spice_port_write_async().

Functions

spice_port_event ()

void
spice_port_event (SpicePortChannel *port,
                  guint8 event);

Send an event to the port.

Note: The values SPICE_PORT_EVENT_CLOSED and SPICE_PORT_EVENT_OPENED are managed by the channel connection state.

Parameters

port

a SpicePortChannel

  

event

a SPICE_PORT_EVENT value

  

Since: 0.15

spice_port_write_async ()

void
spice_port_write_async (SpicePortChannel *port,
                        const void *buffer,
                        gsize count,
                        GCancellable *cancellable,
                        GAsyncReadyCallback callback,
                        gpointer user_data);

Request an asynchronous write of count bytes from buffer into the port . When the operation is finished callback will be called. You can then call spice_port_write_finish() to get the result of the operation.

Parameters

port

A SpicePortChannel

  

buffer

the buffer containing the data to write.

[array length=count][element-type guint8]

count

the number of bytes to write

  

cancellable

optional GCancellable object, NULL to ignore.

[allow-none]

callback

callback to call when the request is satisfied.

[scope async]

user_data

the data to pass to callback function.

[closure]

Since: 0.15

spice_port_write_finish ()

gssize
spice_port_write_finish (SpicePortChannel *port,
                         GAsyncResult *result,
                         GError **error);

Finishes a port write operation.

Parameters

port

a SpicePortChannel

  

result

a GAsyncResult

  

error

a GError location to store the error occurring, or NULL to ignore

  

Returns

a gssize containing the number of bytes written to the stream.

Since: 0.15

Types and Values

struct SpicePortChannel

struct SpicePortChannel;

The SpicePortChannel struct is opaque and should not be accessed directly.

struct SpicePortChannelClass

struct SpicePortChannelClass {
    SpiceChannelClass parent_class;
};

Class structure for SpicePortChannel.

Members

SpiceChannelClass parent_class;

Parent class.

  

Property Details

The “port-name” property

  “port-name”                gchar *

Port name.

Flags: Read

Default value: NULL

The “port-opened” property

  “port-opened”              gboolean

Port opened.

Flags: Read

Default value: FALSE

Signal Details

The “port-data” signal

void
user_function (SpicePortChannel *channel,
               gpointer          data,
               gint              size,
               gpointer          user_data)

The “port-data” signal is emitted when new port data is received.

Parameters

channel

the channel that emitted the signal

  

data

the data received

  

size

number of bytes read

  

user_data

user data set when the signal handler was connected.

  

Flags: Run Last

Since: 0.15

The “port-event” signal

void
user_function (SpicePortChannel *channel,
               gint              event,
               gpointer          user_data)

The “port-event” signal is emitted when new port event is received.

Parameters

channel

the channel that emitted the signal

  

event

the event received

  

size

number of bytes read

  

user_data

user data set when the signal handler was connected.

  

Flags: Run Last

Since: 0.15

See Also

SpiceChannel

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