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+.. Permission is granted to copy, distribute and/or modify this
+.. document under the terms of the GNU Free Documentation License,
+.. Version 1.1 or any later version published by the Free Software
+.. Foundation, with no Invariant Sections, no Front-Cover Texts
+.. and no Back-Cover Texts. A copy of the license is included at
+.. Documentation/userspace-api/media/fdl-appendix.rst.
+..
+.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
+
+.. _NET_ADD_IF:
+
+****************
+ioctl NET_ADD_IF
+****************
+
+Name
+====
+
+NET_ADD_IF - Creates a new network interface for a given Packet ID.
+
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, NET_ADD_IF, struct dvb_net_if *net_if )
+    :name: NET_ADD_IF
+
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :ref:`open() <frontend_f_open>`.
+
+``net_if``
+    pointer to struct :c:type:`dvb_net_if`
+
+
+Description
+===========
+
+The NET_ADD_IF ioctl system call selects the Packet ID (PID) that
+contains a TCP/IP traffic, the type of encapsulation to be used (MPE or
+ULE) and the interface number for the new interface to be created. When
+the system call successfully returns, a new virtual network interface is
+created.
+
+The struct :c:type:`dvb_net_if`::ifnum field will be
+filled with the number of the created interface.
+
+Return Value
+============
+
+On success 0 is returned, and :c:type:`ca_slot_info` is filled.
+
+On error -1 is returned, and the ``errno`` variable is set
+appropriately.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.