1 (defpackage "SB-BSD-SOCKETS-INTERNAL"
4 #+cmu (:shadowing-import-from "CL" with-array-data)
5 #+sbcl (:shadowing-import-from "SB-KERNEL" with-array-data)
7 #+cmu (:use "COMMON-LISP" "ALIEN" "SYSTEM" "EXT" "C-CALL")
8 #+sbcl (:use "COMMON-LISP" "SB-ALIEN" #+nil "SB-SYSTEM" "SB-EXT" "SB-C-CALL"))
10 ;;; SBCL changes a lot of package prefixes. To avoid littering the
11 ;;; code with conditionals, we use the SBCL package prefixes
12 ;;; throughout. This means that we need to create said packages
13 ;;; first, if we're using CMUCL
15 ;;; One thing that this exercise really has made clear is just how much
16 ;;; of the alien stuff is scattered around the cmucl package space
17 ;;; seemingly at random. Hmm.
20 (eval-when (:compile-toplevel :load-toplevel)
21 (defun add-package-nickname (name nickname)
22 (let ((p (find-package name)))
23 (rename-package p (package-name p)
24 (cons nickname (package-nicknames name)))))
25 (add-package-nickname "EXT" "SB-EXT")
26 (add-package-nickname "ALIEN" "SB-ALIEN")
27 (add-package-nickname "UNIX" "SB-UNIX")
28 (add-package-nickname "C-CALL" "SB-C-CALL")
29 (add-package-nickname "KERNEL" "SB-KERNEL")
30 (add-package-nickname "SYSTEM" "SB-SYS"))
32 (defpackage "SB-BSD-SOCKETS"
33 (:export socket local-socket inet-socket
34 make-local-socket make-inet-socket
35 socket-bind socket-accept socket-connect
36 socket-send socket-receive socket-recv
37 socket-name socket-peername socket-listen
38 socket-close socket-file-descriptor socket-make-stream
41 get-host-by-name get-host-by-address
43 host-ent-addresses host-ent-address
44 host-ent aliases host-ent-name
46 ;; not sure if these are really good names or not
53 ;; all socket options are also exported, by code in
56 bad-file-descriptor-error
59 invalid-argument-error
61 operation-not-supported-error
62 operation-not-permitted-error
63 protocol-not-supported-error
64 socket-type-not-supported-error
65 network-unreachable-error
71 (:use "COMMON-LISP" "SB-BSD-SOCKETS-INTERNAL")
75 A thinly-disguised BSD socket API for SBCL. Ideas stolen from the BSD
76 socket API for C and Graham Barr's IO::Socket classes for Perl.
78 We represent sockets as CLOS objects, and rename a lot of methods and
79 arguments to fit Lisp style more closely.
90 <li> Methods applicable to all <a href="#socket">sockets</a>
91 <li> <a href="#sockopt">Socket Options</a>
92 <li> Methods applicable to a particular subclass
94 <li> <a href="#internet">INET-SOCKET</a> - Internet Protocol (TCP, UDP, raw) sockets
95 <li> Methods on <a href="#LOCAL-SOCKET">LOCAL-SOCKET</a> - Local-domain sockets
97 <li> <a href="#name-service">Name resolution</a> (DNS, /etc/hosts, &c)
100 <h2>General concepts</h2>
102 <p>Most of the functions are modelled on the BSD socket API. BSD sockets
103 are widely supported, portably <i>("portable" by Unix standards, at least)</i>
104 available on a variety of systems, and documented. There are some
105 differences in approach where we have taken advantage of some of the more useful features of Common Lisp - briefly
108 <li> Where the C API would typically return -1 and set errno, we
109 signal an error. All the errors are subclasses of SOCKET-CONDITION
110 and generally correspond one for one with possible <tt>errno</tt> values
112 <li> We use multiple return values in many places where the C API would use
113 pass-by-reference values
115 <li> We can often avoid supplying an explicit <i>length</i> argument to
116 functions because we already know how long the argument is.
118 <li> IP addresses and ports are represented in slightly friendlier fashion
119 than "network-endian integers". See the section on <a href="#internet"
120 >Internet domain</a> sockets for details.
126 (in-package :sb-bsd-sockets)
128 (defmethod asdf:hyperdocumentation
129 ((package (eql #.*package*)) symbol kind)
130 (declare (ignore kind))
131 (format nil "file://~A#~A"
133 (merge-pathnames "index.html"
134 (or *load-pathname* *compile-file-pathname*)))