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   except in compliance with the License.  You may obtain a copy of
   the License at

      http://www.apache.org/licenses/LICENSE-2.0

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.. include:: ../../../common.defs

.. default-domain:: cpp

TSHttpTxnClientAddrGet
**********************

Synopsis
========

.. code-block:: cpp

    #include <ts/ts.h>

.. function:: struct sockaddr const * TSHttpTxnClientAddrGet(TSHttpTxn txnp)

Description
===========

Return the socket address of the client that initiated the transaction
:arg:`txnp`. The returned pointer references storage owned by |TS| and is
only valid for the duration of the current callback; plugins that need to
keep the value across callbacks must copy it into their own storage.

The returned ``struct sockaddr`` is address-family agnostic. Inspect the
``sa_family`` field (or use the ``ats_ip_*`` helpers) to dispatch on IPv4
versus IPv6.

If the listener that accepted the connection has the ``pp-clnt`` flag set
and a PROXY Protocol header was successfully parsed, the returned address
is the PROXY-Protocol source address rather than the immediate TCP peer.
Without ``pp-clnt`` the returned address is the immediate TCP peer even
when PROXY Protocol is enabled. See :ref:`Proxy Protocol <proxy-protocol>`
for the full enumeration of surfaces gated by ``pp-clnt``.

Return Value
============

A pointer to the client address, or ``nullptr`` if :arg:`txnp` is invalid
or no client address is available.

See Also
========

:manpage:`TSAPI(3ts)`,
:func:`TSHttpSsnClientAddrGet`,
:func:`TSNetVConnClientAddrGet`
