mirror of
https://github.com/mozilla/gecko-dev.git
synced 2025-11-04 10:18:41 +02:00
49 lines
1.2 KiB
ReStructuredText
49 lines
1.2 KiB
ReStructuredText
PR_OpenUDPSocket
|
|
================
|
|
|
|
Creates a new UDP socket of the specified address family.
|
|
|
|
|
|
Syntax
|
|
------
|
|
|
|
.. code::
|
|
|
|
#include <prio.h>
|
|
|
|
PRFileDesc* PR_OpenUDPSocket(PRIntn af);
|
|
|
|
|
|
Parameters
|
|
~~~~~~~~~~
|
|
|
|
The function has the following parameters:
|
|
|
|
``af``
|
|
The address family of the new UDP socket. Can be ``PR_AF_INET``
|
|
(IPv4), ``PR_AF_INET6`` (IPv6), or ``PR_AF_LOCAL`` (Unix domain,
|
|
supported on POSIX systems only).
|
|
|
|
|
|
Returns
|
|
~~~~~~~
|
|
|
|
The function returns one of the following values:
|
|
|
|
- Upon successful completion, a pointer to the :ref:`PRFileDesc` object
|
|
created for the newly opened UDP socket.
|
|
- If the creation of a new UDP socket failed, ``NULL``.
|
|
|
|
|
|
Description
|
|
-----------
|
|
|
|
UDP (User Datagram Protocol) is a connectionless, unreliable datagram
|
|
protocol of the TCP/IP protocol suite. UDP datagrams may be lost or
|
|
delivered in duplicates or out of sequence.
|
|
|
|
:ref:`PR_OpenUDPSocket` creates a new UDP socket of the address family
|
|
``af``. The socket may be bound to a well-known port number with
|
|
:ref:`PR_Bind`. Datagrams can be sent with :ref:`PR_SendTo` and received with
|
|
:ref:`PR_RecvFrom`. When the socket is no longer needed, it should be
|
|
closed with a call to :ref:`PR_Close`.
|