--- a
+++ b/contrib/sb-bsd-sockets/defpackage.lisp
@@ -0,0 +1,123 @@
+  (:nicknames "SOCKINT")
+  (:shadow close listen)
+  #+cmu (:shadowing-import-from "CL" with-array-data)
+  #+sbcl (:shadowing-import-from "SB-KERNEL" with-array-data)
+  #+cmu (:use "COMMON-LISP" "ALIEN" "SYSTEM" "EXT" "C-CALL")
+  #+sbcl (:use "COMMON-LISP" "SB-ALIEN" #+nil "SB-SYSTEM" "SB-EXT" "SB-C-CALL"))
+;;; SBCL changes a lot of package prefixes.  To avoid littering the
+;;; code with conditionals, we use the SBCL package prefixes
+;;; throughout.  This means that we need to create said packages
+;;; first, if we're using CMUCL
+;;; One thing that this exercise really has made clear is just how much
+;;; of the alien stuff is scattered around the cmucl package space
+;;; seemingly at random.  Hmm.
+(eval-when (:compile-toplevel :load-toplevel)
+  (defun add-package-nickname (name nickname)
+    (let ((p (find-package name)))
+      (rename-package p (package-name p)
+                      (cons nickname (package-nicknames name)))))
+  (add-package-nickname "EXT" "SB-EXT")
+  (add-package-nickname "ALIEN" "SB-ALIEN")
+  (add-package-nickname "UNIX" "SB-UNIX")
+  (add-package-nickname "C-CALL" "SB-C-CALL")
+  (add-package-nickname "KERNEL" "SB-KERNEL")
+  (add-package-nickname "SYSTEM" "SB-SYS"))
+(defpackage "SB-BSD-SOCKETS"
+  (:export socket unix-socket inet-socket
+           make-unix-socket make-inet-socket
+           socket-bind socket-accept socket-connect
+           socket-send socket-receive socket-recv
+           socket-name socket-peername socket-listen
+           socket-close socket-file-descriptor socket-make-stream
+           get-protocol-by-name
+           get-host-by-name get-host-by-address
+           host-ent
+           host-ent-addresses host-ent-address
+           host-ent aliases host-ent-name
+           name-service-error
+           ;; not sure if these are really good names or not
+           netdb-internal-error
+           netdb-success-error
+           host-not-found-error
+           try-again-error
+           no-recovery-error
+	   ;; all socket options are also exported, by code in
+	   ;; sockopt.lisp
+           bad-file-descriptor-error
+           address-in-use-error
+           interrupted-error
+           invalid-argument-error
+           out-of-memory-error
+           operation-not-supported-error
+           operation-not-permitted-error
+           protocol-not-supported-error
+	   socket-type-not-supported-error
+           network-unreachable-error
+           make-inet-address
+           non-blocking-mode
+           )
+  (:documentation
+   "
+A thinly-disguised BSD socket API for SBCL.  Ideas stolen from the BSD
+socket API for C and Graham Barr's IO::Socket classes for Perl.
+We represent sockets as CLOS objects, and rename a lot of methods and
+arguments to fit Lisp style more closely.
+   ))
+<li> General concepts
+<li> Methods applicable to all <a href="#socket">sockets</a>
+<li> <a href="#sockopt">Socket Options</a>
+<li> Methods applicable to a particular subclass
+<li> <a href="#internet">INET-SOCKET</a> - Internet Protocol (TCP, UDP, raw) sockets
+<li> Methods on <a href="#UNIX-SOCKET">UNIX-SOCKET</a> - Unix-domain sockets 
+<li> <a href="#name-service">Name resolution</a> (DNS, /etc/hosts, &amp;c)
+<h2>General concepts</h2>
+<p>Most of the functions are modelled on the BSD socket API.  BSD sockets
+are widely supported, portably <i>("portable" by Unix standards, at least)</i>
+available on a variety of systems, and documented.  There are some
+differences in approach where we have taken advantage of some of the more useful features of Common Lisp - briefly
+<li> Where the C API would typically return -1 and set errno, bsd-sockets
+signals an error.  All the errors are subclasses of SOCKET-CONDITION
+and generally correspond one for one with possible <tt>errno</tt> values
+<li> We use multiple return values in many places where the C API would use p[ass-by-reference values
+<li> We can often avoid supplying an explicit <i>length</i> argument to
+functions because we already know how long the argument is.
+<li> IP addresses and ports are represented in slightly friendlier fashion
+than "network-endian integers".  See the section on <a href="#internet"
+>Internet domain</a> sockets for details.