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+<h1>Address Info API</h1>
+
+This CHICKEN module exposes <tt>getaddrinfo(3)</tt> functionality to Scheme.
+
+<verbatim>
+  (require-extension address-info)
+</verbatim>
+
+<h2>Address Info Record</h2>
+
+<verbatim>
+  (define-record-type address-info
+    (make-address-info family type host port)
+    address-info?
+    [family address-info-family]
+    [type address-info-type]
+    [host address-info-host]
+    [port address-info-port])
+</verbatim>
+
+Descriptor for an internet socket address. The family is either
+<tt>'ipv4</tt> or <tt>'ipv6</tt>. The type is either <tt>'tcp</tt>,
+<tt>'udp</tt> or <tt>'raw</tt>. The host is a numeric address encoded as
+a string. The port is a either a positive integer or <tt>#f</tt>.
+
+<h2>Address Info Lookup</h2>
+
+<verbatim>
+  (address-infos
+   HOST [#:port PORT]
+   [#:family FAMILY] [#:type TYPE]
+   [#:server? BOOLEAN] [#:numeric? BOOLEAN])
+  => (list ADDRESS-INFO ...) | #f
+</verbatim>
+
+Tries to lookup socket addresses for the given host and/or port. If the
+lookup is successful, the procedure returns a list of address
+information records. Otherwise it returns <tt>#f</tt>.
+
+For a successful lookup you must at least specify a hostname or a port.
+If no hostname is specified, the function defaults to server mode lookup
+and will return wildcard addresses. This behaviour can be changed using
+the <tt>#:server?</tt> flag.
+
+By default, the procedure will return address information records for
+all suitable supported protocol families and socket types. The
+<tt>#:family</tt> argument may be used to filter for <tt>'ipv4</tt> or
+<tt>'ipv6</tt> addresses. The <tt>#:type</tt> argument may be used to
+filter for <tt>'tcp</tt> / <tt>'stream</tt>, <tt>'udp</tt> /
+<tt>'datagram</tt> or <tt>'raw</tt> socket types.
+
+Unless the <tt>#:numeric?</tt> flag is set to a true value, the
+procedure will convert hostnames into numeric network addresses.