<p>Good point, this even allows for a much cleaner fix. I now have modified the fix to call <code>_sockaddr_to_ep()</code> in <code>socket_sendto()</code> only if <code>address != NULL</code> (for datagram sockets) and call <code>sock_udp_get_remote()</code> otherwise.</p>
<p>As <code>sock_udp_get_remote()</code> requires a <code>sock_udp_t *</code> as its first argument, this part has been moved into the switch-case <code>SOCK_DGRAM</code>.</p>

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