(in-package :sb-bsd-sockets) ;;; Our class and constructor (eval-when (:compile-toplevel :load-toplevel :execute) (defclass inet-socket (socket) ((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\". 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 "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)) (declare (type fixnum buffer-length) (type fixnum max-buffer)) (loop (sb-alien:with-alien ((result-buf (* sockint::protoent) (sb-alien:make-alien sockint::protoent)) (buffer (* char ) (sb-alien:make-alien sb-alien:char buffer-length)) #-solaris (result (* (* sockint::protoent)) (sb-alien:make-alien (* sockint::protoent)))) (let ((res (sockint::getprotobyname-r name result-buf buffer buffer-length #-solaris result))) (if (eql res 0) (progn #-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))) (let ((errno (sb-unix::get-errno))) (if (eql errno sockint::erange) (progn (incf buffer-length 1024) (if (> buffer-length max-buffer) (error "Exceeded max-buffer of ~d" max-buffer))) (error "Unexpected errno ~d" errno)))))))) #-(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 (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 (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))