sbcl stuff
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Ian Keane
parent
1d1dbc34df
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335 changed files with 119806 additions and 1 deletions
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;;;; -*- Mode: LISP; Syntax: ANSI-Common-Lisp; Package: USOCKET; Base: 10 -*-
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;;;; See LICENSE for licensing information.
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(in-package :usocket)
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(defclass genera-socket ()
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((foreign-address :initform 0 :initarg :foreign-address :accessor gs-foreign-address)
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(foreign-port :initform 0 :initarg :foreign-port :accessor gs-foreign-port)
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(local-address :initform 0 :initarg :local-address :accessor gs-local-address)
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(local-port :initform 0 :initarg :local-port :accessor gs-local-port))
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)
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(defclass genera-stream-socket (genera-socket)
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((stream :initform nil :initarg :stream :accessor gs-stream))
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)
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(defclass genera-stream-server-socket (genera-socket)
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((backlog :initform nil :initarg :backlog :accessor gs-backlog)
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(element-type :initform nil :initarg :element-type :accessor gs-element-type)
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(pending-connections :initform nil :accessor gs-pending-connections))
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)
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(defclass genera-datagram-socket (genera-socket)
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((connection :initform nil :initarg :connection :accessor gs-connection))
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)
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(defun host-to-host-object (host)
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(let ((host (host-to-hostname host)))
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(cond ((string-equal host "localhost")
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net:*local-host*)
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((ip-address-string-p host)
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(let ((quad (dotted-quad-to-vector-quad host)))
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;;---*** NOTE: This test is temporary until we have a loopback interface
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(if (= (aref quad 0) 127)
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net:*local-host*
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(net:parse-host (format nil "INTERNET|~A" host)))))
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(t
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(net:parse-host host)))))
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(defun element-type-to-format (element-type protocol)
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(cond ((null element-type)
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(ecase protocol
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(:stream :text)
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(:datagram :binary)))
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((subtypep element-type 'character)
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:text)
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(t :binary)))
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(defun handle-condition (condition &optional (socket nil) (host-or-ip nil))
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(typecase condition
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;;---*** TODO: Add additional conditions as appropriate
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(sys:connection-refused
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(error 'connection-refused-error :socket socket))
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((or tcp::tcp-destination-unreachable-during-connection tcp::udp-destination-unreachable)
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(error 'host-unreachable-error :socket socket))
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(sys:host-not-responding-during-connection
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(error 'timeout-error :socket socket))
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(sys:unknown-host-name
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(error 'ns-host-not-found-error :host-or-ip host-or-ip))
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(sys:network-error
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(error 'unknown-error :socket socket :real-error condition :errno -1))))
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(defun socket-connect (host port &key (protocol :stream) element-type
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timeout deadline (nodelay nil nodelay-p)
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local-host local-port)
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(declare (ignore local-host))
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(when deadline
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(unsupported 'deadline 'socket-connect))
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(when (and nodelay-p (not (eq nodelay :if-supported)))
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(unsupported 'nodelay 'socket-connect))
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(with-mapped-conditions (nil host)
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(ecase protocol
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(:stream
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(let* ((host-object (host-to-host-object host))
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(format (element-type-to-format element-type protocol))
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(characters (eq format :text))
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(timeout (if timeout
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(* 60 timeout)
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tcp:*tcp-connect-timeout*))
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(stream (tcp:open-tcp-stream host-object port local-port
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:characters characters
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:ascii-translation characters
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:timeout timeout))
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(gs (make-instance 'genera-stream-socket
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:stream stream)))
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(setf (gs-foreign-address gs) (scl:send stream :foreign-address))
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(setf (gs-foreign-port gs) (scl:send stream :foreign-port))
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(setf (gs-local-address gs) (scl:send stream :local-address))
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(setf (gs-local-port gs) (scl:send stream :local-port))
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(make-stream-socket :socket gs :stream stream)))
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(:datagram
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;;---*** TODO
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(unsupported 'datagram 'socket-connect)))))
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(defmethod socket-close ((usocket usocket))
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(with-mapped-conditions (usocket)
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(socket-close (socket usocket))))
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(defmethod socket-close ((socket genera-stream-socket))
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(with-slots (stream) socket
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(when stream
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(scl:send (shiftf stream nil) :close nil))))
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(defmethod socket-close ((socket genera-stream-server-socket))
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(with-slots (local-port pending-connections) socket
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(when local-port
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(tcp:remove-tcp-port-listener local-port))
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(dolist (tcb pending-connections)
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(tcp::reject-tcb tcb))))
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(defmethod socket-close ((socket genera-datagram-socket))
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(with-slots (connection) socket
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(when connection
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(scl:send (shiftf connection nil) :close nil))
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;;---*** TODO: listening?
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))
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;;; Cribbed from TCP::MAKE-TCB
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(defun gensym-tcp-port ()
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(loop as number = (incf tcp::*last-gensym-port-number*) then tcp::*last-gensym-port-number*
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do (cond ((loop for existing-tcb in tcp::*tcb-list*
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thereis (= number (tcp::tcb-local-port existing-tcb))))
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((and (<= #.(expt 2 10) number) (< number #.(expt 2 16)))
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(return number))
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(t
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(setq tcp::*last-gensym-port-number* #.(expt 2 10))))))
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(defun socket-listen (host port &key (reuse-address nil reuse-address-p)
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(reuseaddress nil reuseaddress-p)
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(backlog 5) (element-type 'character))
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(let ((host-object (host-to-host-object host))
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(port (if (zerop port) (gensym-tcp-port) port))
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(reuse-address (cond (reuse-address-p reuse-address)
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(reuseaddress-p reuseaddress)
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(t nil))))
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(when (<= port 1024)
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;; Don't allow listening on "privileged" ports to mimic Unix/Linux semantics
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(error 'operation-not-permitted-error :socket nil))
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(when (tcp:tcp-port-protocol-name port)
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;; Can't replace a Genera server
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(error 'address-in-use-error :socket nil))
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(when (tcp:tcp-port-listener port)
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(unless reuse-address
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(error 'address-in-use-error :socket nil)))
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(let ((gs (make-instance 'genera-stream-server-socket
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:backlog backlog
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:element-type element-type)))
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(setf (gs-local-address gs)
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(loop for (network address) in (scl:send host-object :network-addresses)
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when (typep network 'tcp:internet-network)
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return address))
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(setf (gs-local-port gs) port)
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(flet ((add-to-queue (tcb)
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(cond ((and (not (zerop (gs-local-address gs)))
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(not (= (gs-local-address gs) (tcp::tcb-local-address tcb))))
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;; Reject if not destined for the proper address
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(tcp::reject-tcb tcb))
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((<= (length (gs-pending-connections gs)) (gs-backlog gs))
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(tcp::accept-tcb tcb)
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(tcp::tcb-travel-through-states tcb "Accept" nil :listen :syn-received)
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(setf (gs-pending-connections gs)
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(append (gs-pending-connections gs) (list tcb))))
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(t
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;; Reject if backlog is full
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(tcp::reject-tcb tcb)))))
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(tcp:add-tcp-port-listener port #'add-to-queue))
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(make-stream-server-socket gs :element-type element-type))))
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(defmethod socket-accept ((socket stream-server-usocket) &key element-type)
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(with-slots (pending-connections) (socket socket)
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(loop
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(process:process-block "Wait for connection" #'(lambda ()
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(not (null pending-connections))))
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(let ((tcb (pop pending-connections)))
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(when tcb
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(let* ((format (element-type-to-format (or element-type (element-type socket))
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:stream))
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(characters (eq format :text))
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(stream (tcp::make-tcp-stream tcb
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:characters characters
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:ascii-translation characters))
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(gs (make-instance 'genera-stream-socket
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:stream stream)))
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(setf (gs-foreign-address gs) (scl:send stream :foreign-address))
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(setf (gs-foreign-port gs) (scl:send stream :foreign-port))
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(setf (gs-local-address gs) (scl:send stream :local-address))
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(setf (gs-local-port gs) (scl:send stream :local-port))
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(return (make-stream-socket :socket gs :stream stream))))))))
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(defmethod get-local-address ((usocket usocket))
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(hbo-to-vector-quad (gs-local-address (socket usocket))))
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(defmethod get-peer-address ((usocket stream-usocket))
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(hbo-to-vector-quad (gs-foreign-address (socket usocket))))
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(defmethod get-local-port ((usocket usocket))
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(gs-local-port (socket usocket)))
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(defmethod get-peer-port ((usocket stream-usocket))
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(gs-foreign-port (socket usocket)))
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(defmethod get-local-name ((usocket usocket))
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(values (get-local-address usocket)
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(get-local-port usocket)))
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(defmethod get-peer-name ((usocket stream-usocket))
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(values (get-peer-address usocket)
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(get-peer-port usocket)))
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(defmethod socket-send ((usocket datagram-usocket) buffer size &key host port (offset 0))
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;;---*** TODO
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(unsupported 'datagram 'socket-send))
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(defmethod socket-receive ((socket datagram-usocket) buffer length &key)
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;;---*** TODO
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(unsupported 'datagram 'socket-receive))
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(defun get-host-by-address (address)
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) ;; TODO
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(defun get-hosts-by-name (name)
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(with-mapped-conditions (nil name)
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(let ((host-object (host-to-host-object name)))
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(loop for (network address) in (scl:send host-object :network-addresses)
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when (typep network 'tcp:internet-network)
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collect (hbo-to-vector-quad address)))))
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(defun %setup-wait-list (wait-list)
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(declare (ignore wait-list)))
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(defun %add-waiter (wait-list waiter)
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(declare (ignore wait-list waiter)))
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(defun %remove-waiter (wait-list waiter)
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(declare (ignore wait-list waiter)))
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(defun wait-for-input-internal (wait-list &key timeout)
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(with-mapped-conditions ()
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(process:process-block-with-timeout timeout "Wait for input"
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#'(lambda (wait-list)
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(let ((ready-sockets nil))
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(dolist (waiter (wait-list-waiters wait-list) ready-sockets)
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(setf (state waiter)
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(cond ((stream-usocket-p waiter)
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(if (listen (socket-stream waiter))
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:read
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nil))
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((datagram-usocket-p waiter)
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(let ((connection (gs-connection (socket waiter))))
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(if (and connection
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(not (scl:send connection :connection-pending-p)))
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:read
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nil)))
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((stream-server-usocket-p waiter)
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(if (gs-pending-connections (socket waiter))
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:read
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nil))))
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(when (not (null (state waiter)))
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(setf ready-sockets t)))))
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wait-list)
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wait-list))
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