(in-package :sb-bsd-sockets)
-#|| <h2>INET-domain sockets</h2>
-
-<p>The TCP and UDP sockets that you know and love. Some representation issues:
-<ul>
-<li>These functions do not accept hostnames directly: see <a href="#name-service">name resolution</a>
-<li>Internet <b>addresses</b> are represented by vectors of <tt>(unsigned-byte 8)</tt> - viz. <tt>#(127 0 0 1)</tt>. <b>Ports</b> are just integers: <tt>6010</tt>. No conversion between network- and host-order data is needed from the user of this package.
-<li><b><i>socket addresses</i></b> are represented by the two values for <b>address</b> and <b>port</b>, so for example, <tt>(<a href="#SOCKET-CONNECT">socket-connect</a> s #(192 168 1 1) 80)</tt>
-</ul>
-
-|#
-
;;; Our class and constructor
(eval-when (:compile-toplevel :load-toplevel :execute)
(defclass inet-socket (socket)
- ((family :initform sockint::AF-INET))))
+ ((family :initform sockint::AF-INET))
+ (:documentation "Class representing TCP and UDP sockets.
+
+Examples:
+
+ (make-instance 'inet-socket :type :stream :protocol :tcp)
+
+ (make-instance 'inet-socket :type :datagram :protocol :udp)
+")))
;;; XXX should we *...* this?
(defparameter inet-address-any (vector 0 0 0 0))
+(defmethod socket-namestring ((socket inet-socket))
+ (ignore-errors
+ (multiple-value-bind (addr port) (socket-name socket)
+ (format nil "~{~A~^.~}:~A" (coerce addr 'list) port))))
+
+(defmethod socket-peerstring ((socket inet-socket))
+ (ignore-errors
+ (multiple-value-bind (addr port) (socket-peername socket)
+ (format nil "~{~A~^.~}:~A" (coerce addr 'list) port))))
+
;;; binding a socket to an address and port. Doubt that anyone's
;;; actually using this much, to be honest.
(defun make-inet-address (dotted-quads)
"Return a vector of octets given a string DOTTED-QUADS in the format
-\"127.0.0.1\""
- (coerce
- (mapcar #'parse-integer
- (split dotted-quads nil '(#\.)))
- 'vector))
+\"127.0.0.1\". Signals an error if the string is malformed."
+ (declare (type string dotted-quads))
+ (labels ((oops ()
+ (error "~S is not a string designating an IP address."
+ dotted-quads))
+ (check (x)
+ (if (typep x '(unsigned-byte 8))
+ x
+ (oops))))
+ (let* ((s1 (position #\. dotted-quads))
+ (s2 (if s1 (position #\. dotted-quads :start (1+ s1)) (oops)))
+ (s3 (if s2 (position #\. dotted-quads :start (1+ s2)) (oops)))
+ (u0 (parse-integer dotted-quads :end s1))
+ (u1 (parse-integer dotted-quads :start (1+ s1) :end s2))
+ (u2 (parse-integer dotted-quads :start (1+ s2) :end s3)))
+ (multiple-value-bind (u3 end) (parse-integer dotted-quads :start (1+ s3) :junk-allowed t)
+ (unless (= end (length dotted-quads))
+ (oops))
+ (let ((vector (make-array 4 :element-type '(unsigned-byte 8))))
+ (setf (aref vector 0) (check u0)
+ (aref vector 1) (check u1)
+ (aref vector 2) (check u2)
+ (aref vector 3) (check u3))
+ vector)))))
+
+(define-condition unknown-protocol ()
+ ((name :initarg :name
+ :reader unknown-protocol-name))
+ (:report (lambda (c s)
+ (format s "Protocol not found: ~a" (prin1-to-string
+ (unknown-protocol-name c))))))
+
+#+(and sb-thread (not os-provides-getprotoby-r))
+;; Since getprotobyname is not thread-safe, we need a lock.
+(sb-ext:defglobal **getprotoby-lock** (sb-thread:make-mutex :name "getprotoby lock"))
;;; getprotobyname only works in the internet domain, which is why this
;;; is here
(defun get-protocol-by-name (name) ;exported
- "Returns the network protocol number associated with the string NAME,
-using getprotobyname(2) which typically looks in NIS or /etc/protocols"
- ;; for extra brownie points, could return canonical protocol name
- ;; and aliases as extra values
- (let ((ent (sb-grovel::foreign-vector (sockint::getprotobyname name) 1
- sockint::size-of-protoent)))
- (sockint::protoent-proto ent)))
-
-
-;;; sockaddr protocol
-;;; (1) sockaddrs are represented as the semi-foreign array-of-octets
-;;; thing
-;;; (2) a protocol provides make-sockaddr-for, size-of-sockaddr,
+ "Given a protocol name, return the protocol number, the protocol name, and
+a list of protocol aliases"
+
+ ;; Brownie Points. Hopefully there's one person out there using
+ ;; RSPF sockets and SBCL who will appreciate the extra info
+ (labels ((protoent-to-values (protoent)
+ (values
+ (sockint::protoent-proto protoent)
+ (sockint::protoent-name protoent)
+ (let ((index 0))
+ (loop
+ for alias = (sb-alien:deref
+ (sockint::protoent-aliases protoent) index)
+ while (not (sb-alien:null-alien alias))
+ do (incf index)
+ collect (sb-alien::c-string-to-string
+ (sb-alien:alien-sap alias)
+ (sb-impl::default-external-format)
+ 'character))))))
+ #+(and sb-thread os-provides-getprotoby-r)
+ (let ((buffer-length 1024)
+ (max-buffer 10000)
+ (result-buf nil)
+ (buffer nil)
+ #-solaris
+ (result nil))
+ (declare (type fixnum buffer-length)
+ (type fixnum max-buffer))
+ (loop
+ (unwind-protect
+ (progn
+ (setf result-buf (sb-alien:make-alien sockint::protoent)
+ buffer (sb-alien:make-alien sb-alien:char buffer-length))
+ #-solaris
+ (setf result (sb-alien:make-alien (* sockint::protoent)))
+ (when (or (sb-alien:null-alien result-buf)
+ (sb-alien:null-alien buffer)
+ (sb-alien:null-alien result))
+ (error "Could not allocate foreign memory."))
+ (let ((res (sockint::getprotobyname-r
+ name result-buf buffer buffer-length #-solaris result)))
+ (cond ((eql res 0)
+ #-solaris
+ (when (sb-alien::null-alien (sb-alien:deref result 0))
+ (error 'unknown-protocol :name name))
+ (return-from get-protocol-by-name
+ (protoent-to-values result-buf)))
+ (t
+ (let ((errno (sb-unix::get-errno)))
+ (cond ((eql errno sockint::erange)
+ (incf buffer-length 1024)
+ (when (> buffer-length max-buffer)
+ (error "Exceeded max-buffer of ~d" max-buffer)))
+ (t
+ (error "Unexpected errno ~d" errno))))))))
+ (when result-buf
+ (sb-alien:free-alien result-buf))
+ (when buffer
+ (sb-alien:free-alien buffer))
+ #-solaris
+ (when result
+ (sb-alien:free-alien result)))))
+ #-(and sb-thread os-provides-getprotoby-r)
+ (tagbody
+ (flet ((get-it ()
+ (let ((ent (sockint::getprotobyname name)))
+ (if (sb-alien::null-alien ent)
+ (go :error)
+ (return-from get-protocol-by-name (protoent-to-values ent))))))
+ #+sb-thread
+ (sb-thread::with-system-mutex (**getprotoby-lock**)
+ (get-it))
+ #-sb-thread
+ (get-it))
+ :error
+ (error 'unknown-protocol :name name))))
+
+;;; our protocol provides make-sockaddr-for, size-of-sockaddr,
;;; bits-of-sockaddr
(defmethod make-sockaddr-for ((socket inet-socket) &optional sockaddr &rest address &aux (host (first address)) (port (second address)))
(let ((sockaddr (or sockaddr (sockint::allocate-sockaddr-in))))
(when (and host port)
+ (setf host (coerce host '(simple-array (unsigned-byte 8) (4))))
;; port and host are represented in C as "network-endian" unsigned
;; integers of various lengths. This is stupid. The value of the
;; integer doesn't matter (and will change depending on your
;; machine's endianness); what the bind(2) call is interested in
;; is the pattern of bytes within that integer.
-
+
;; We have no truck with such dreadful type punning. Octets to
;; octets, dust to dust.
-
+
(setf (sockint::sockaddr-in-family sockaddr) sockint::af-inet)
- (setf (sockint::sockaddr-in-port sockaddr 0) (ldb (byte 8 8) port))
- (setf (sockint::sockaddr-in-port sockaddr 1) (ldb (byte 8 0) port))
-
- (setf (sockint::sockaddr-in-addr sockaddr 0) (elt host 0))
- (setf (sockint::sockaddr-in-addr sockaddr 1) (elt host 1))
- (setf (sockint::sockaddr-in-addr sockaddr 2) (elt host 2))
- (setf (sockint::sockaddr-in-addr sockaddr 3) (elt host 3)))
+ (setf (sb-alien:deref (sockint::sockaddr-in-port sockaddr) 0) (ldb (byte 8 8) port))
+ (setf (sb-alien:deref (sockint::sockaddr-in-port sockaddr) 1) (ldb (byte 8 0) port))
+
+ (setf (sb-alien:deref (sockint::sockaddr-in-addr sockaddr) 0) (elt host 0))
+ (setf (sb-alien:deref (sockint::sockaddr-in-addr sockaddr) 1) (elt host 1))
+ (setf (sb-alien:deref (sockint::sockaddr-in-addr sockaddr) 2) (elt host 2))
+ (setf (sb-alien:deref (sockint::sockaddr-in-addr sockaddr) 3) (elt host 3)))
sockaddr))
+(defmethod free-sockaddr-for ((socket inet-socket) sockaddr)
+ (sockint::free-sockaddr-in sockaddr))
+
(defmethod size-of-sockaddr ((socket inet-socket))
sockint::size-of-sockaddr-in)
(defmethod bits-of-sockaddr ((socket inet-socket) sockaddr)
"Returns address and port of SOCKADDR as multiple values"
(values
- (vector
- (sockint::sockaddr-in-addr sockaddr 0)
- (sockint::sockaddr-in-addr sockaddr 1)
- (sockint::sockaddr-in-addr sockaddr 2)
- (sockint::sockaddr-in-addr sockaddr 3))
- (+ (* 256 (sockint::sockaddr-in-port sockaddr 0))
- (sockint::sockaddr-in-port sockaddr 1))))
-
+ (coerce (loop for i from 0 below 4
+ collect (sb-alien:deref (sockint::sockaddr-in-addr sockaddr) i))
+ '(vector (unsigned-byte 8) 4))
+ (+ (* 256 (sb-alien:deref (sockint::sockaddr-in-port sockaddr) 0))
+ (sb-alien:deref (sockint::sockaddr-in-port sockaddr) 1))))
+
(defun make-inet-socket (type protocol)
"Make an INET socket. Deprecated in favour of make-instance"
(make-instance 'inet-socket :type type :protocol protocol))
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