+ <para><function>sd_is_socket_sockaddr()</function> is similar to
+ <function>sd_is_socket_inet()</function>, but checks if the socket is bound to the
+ address specified by <parameter>addr</parameter>. The
+ <structfield>family</structfield> specified by <parameter>addr</parameter> must be
+ either <constant>AF_INET</constant> or <constant>AF_INET6</constant> and
+ <parameter>addr_len</parameter> must be large enough for that family. If
+ <parameter>addr</parameter> specifies a non-zero port, it is also checked if the
+ socket is bound to this port. In addition, for IPv6, if <parameter>addr</parameter>
+ specifies non-zero <structfield>sin6_flowinfo</structfield> or
+ <structfield>sin6_scope_id</structfield>, it is checked if the socket has the same
+ values.</para>
+