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+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`.