1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
|
;;;; $Id$
;;;; $URL$
;; MCL backend for USOCKET 0.4.1
;; Terje Norderhaug <terje@in-progress.com>, January 1, 2009
(in-package :usocket)
(defun handle-condition (condition &optional socket)
; incomplete, needs to handle additional conditions
(flet ((raise-error (&optional socket-condition)
(if socket-condition
(error socket-condition :socket socket)
(error 'unknown-error :socket socket :real-error condition))))
(typecase condition
(ccl:host-stopped-responding
(raise-error 'host-down-error))
(ccl:host-not-responding
(raise-error 'host-unreachable-error))
(ccl:connection-reset
(raise-error 'connection-reset-error))
(ccl:connection-timed-out
(raise-error 'timeout-error))
(ccl:opentransport-protocol-error
(raise-error 'protocol-not-supported-error))
(otherwise
(raise-error)))))
(defun socket-connect (host port &key (element-type 'character) timeout deadline nodelay
local-host local-port (protocol :stream))
(when (eq nodelay :if-supported)
(setf nodelay t))
(ecase protocol
(:stream
(with-mapped-conditions ()
(let* ((socket
(make-instance 'active-socket
:remote-host (when host (host-to-hostname host))
:remote-port port
:local-host (when local-host (host-to-hostname local-host))
:local-port local-port
:deadline deadline
:nodelay nodelay
:connect-timeout (and timeout (round (* timeout 60)))
:element-type element-type))
(stream (socket-open-stream socket)))
(make-stream-socket :socket socket :stream stream))))
(:datagram
(with-mapped-conditions ()
(make-datagram-socket
(ccl::open-udp-socket :local-address (and local-host (host-to-hbo local-host))
:local-port local-port))))))
(defun socket-listen (host port
&key reuseaddress
(reuse-address nil reuse-address-supplied-p)
(backlog 5)
(element-type 'character))
(let* ((reuseaddress (if reuse-address-supplied-p reuse-address reuseaddress))
(socket (with-mapped-conditions ()
(make-instance 'passive-socket
:local-port port
:local-host (host-to-hbo host)
:reuse-address reuseaddress
:backlog backlog))))
(make-stream-server-socket socket :element-type element-type)))
(defmethod socket-accept ((usocket stream-server-usocket) &key element-type)
(let* ((socket (socket usocket))
(stream (with-mapped-conditions (usocket)
(socket-accept socket :element-type element-type))))
(make-stream-socket :socket socket :stream stream)))
(defmethod socket-close ((usocket usocket))
(with-mapped-conditions (usocket)
(socket-close (socket usocket))))
(defmethod socket-shutdown ((usocket usocket) direction)
(declare (ignore usocket direction))
;; As far as I can tell there isn't a way to shutdown a socket in mcl.
(unsupported "shutdown" 'socket-shutdown))
(defmethod ccl::stream-close ((usocket usocket))
(socket-close usocket))
(defun get-hosts-by-name (name)
(with-mapped-conditions ()
(list (hbo-to-vector-quad (ccl::get-host-address
(host-to-hostname name))))))
(defun get-host-by-address (address)
(with-mapped-conditions ()
(ccl::inet-host-name (host-to-hbo address))))
(defmethod get-local-name ((usocket usocket))
(values (get-local-address usocket)
(get-local-port usocket)))
(defmethod get-peer-name ((usocket stream-usocket))
(values (get-peer-address usocket)
(get-peer-port usocket)))
(defmethod get-local-address ((usocket usocket))
(hbo-to-vector-quad (ccl::get-host-address (or (local-host (socket usocket)) ""))))
(defmethod get-local-port ((usocket usocket))
(local-port (socket usocket)))
(defmethod get-peer-address ((usocket stream-usocket))
(hbo-to-vector-quad (ccl::get-host-address (remote-host (socket usocket)))))
(defmethod get-peer-port ((usocket stream-usocket))
(remote-port (socket usocket)))
(defun %setup-wait-list (wait-list)
(declare (ignore wait-list)))
(defun %add-waiter (wait-list waiter)
(declare (ignore wait-list waiter)))
(defun %remove-waiter (wait-list waiter)
(declare (ignore wait-list waiter)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; BASIC MCL SOCKET IMPLEMENTATION
(defclass socket ()
((local-port :reader local-port :initarg :local-port)
(local-host :reader local-host :initarg :local-host)
(element-type :reader element-type :initform 'ccl::base-character :initarg :element-type)))
(defclass active-socket (socket)
((remote-host :reader remote-host :initarg :remote-host)
(remote-port :reader remote-port :initarg :remote-port)
(deadline :initarg :deadline)
(nodelay :initarg :nodelay)
(connect-timeout :reader connect-timeout :initform NIL :initarg :connect-timeout
:type (or null fixnum) :documentation "ticks (60th of a second)")))
(defmethod socket-open-stream ((socket active-socket))
(ccl::open-tcp-stream (or (remote-host socket)(ccl::local-interface-ip-address)) (remote-port socket)
:element-type (if (subtypep (element-type socket) 'character) 'ccl::base-character 'unsigned-byte)
:connect-timeout (connect-timeout socket)))
(defmethod socket-close ((socket active-socket))
NIL)
(defclass passive-socket (socket)
((streams :accessor socket-streams :type list :initform NIL
:documentation "Circular list of streams with first element the next to open")
(reuse-address :reader reuse-address :initarg :reuse-address)
(lock :reader socket-lock :initform (ccl:make-lock "Socket"))))
(defmethod initialize-instance :after ((socket passive-socket) &key backlog)
(loop repeat backlog
collect (socket-open-listener socket) into streams
finally (setf (socket-streams socket)
(cdr (rplacd (last streams) streams))))
(when (zerop (local-port socket))
(setf (slot-value socket 'local-port)
(or (ccl::process-wait-with-timeout "binding port" (* 10 60)
#'ccl::stream-local-port (car (socket-streams socket)))
(error "timeout")))))
(defmethod socket-accept ((socket passive-socket) &key element-type &aux (lock (socket-lock socket)))
(flet ((connection-established-p (stream)
(ccl::with-io-buffer-locked ((ccl::stream-io-buffer stream nil))
(let ((state (ccl::opentransport-stream-connection-state stream)))
(not (eq :unbnd state))))))
(with-mapped-conditions ()
(ccl:with-lock-grabbed (lock nil "Socket Lock")
(let ((connection (shiftf (car (socket-streams socket))
(socket-open-listener socket element-type))))
(pop (socket-streams socket))
(ccl:process-wait "Accepting" #'connection-established-p connection)
connection)))))
(defmethod socket-close ((socket passive-socket))
(loop
with streams = (socket-streams socket)
for (stream tail) on streams
do (close stream :abort T)
until (eq tail streams)
finally (setf (socket-streams socket) NIL)))
(defmethod socket-open-listener (socket &optional element-type)
; see http://code.google.com/p/mcl/issues/detail?id=28
(let* ((ccl::*passive-interface-address* (local-host socket))
(new (ccl::open-tcp-stream NIL (or (local-port socket) #$kOTAnyInetAddress)
:reuse-local-port-p (reuse-address socket)
:element-type (if (subtypep (or element-type (element-type socket))
'character)
'ccl::base-character
'unsigned-byte))))
(declare (special ccl::*passive-interface-address*))
new))
(defmethod input-available-p ((stream ccl::opentransport-stream))
(macrolet ((when-io-buffer-lock-grabbed ((lock &optional multiple-value-p) &body body)
"Evaluates the body if and only if the lock is successfully grabbed"
;; like with-io-buffer-lock-grabbed but returns immediately instead of polling the lock
(let ((needs-unlocking-p (gensym))
(lock-var (gensym)))
`(let* ((,lock-var ,lock)
(ccl::*grabbed-io-buffer-locks* (cons ,lock-var ccl::*grabbed-io-buffer-locks*))
(,needs-unlocking-p (needs-unlocking-p ,lock-var)))
(declare (dynamic-extent ccl::*grabbed-io-buffer-locks*))
(when ,needs-unlocking-p
(,(if multiple-value-p 'multiple-value-prog1 'prog1)
(progn ,@body)
(ccl::%release-io-buffer-lock ,lock-var)))))))
(labels ((needs-unlocking-p (lock)
(declare (type ccl::lock lock))
;; crucial - clears bogus lock.value as in grab-io-buffer-lock-out-of-line:
(ccl::%io-buffer-lock-really-grabbed-p lock)
(ccl:store-conditional lock nil ccl:*current-process*)))
"similar to stream-listen on buffered-input-stream-mixin but without waiting for lock"
(let ((io-buffer (ccl::stream-io-buffer stream)))
(or (not (eql 0 (ccl::io-buffer-incount io-buffer)))
(ccl::io-buffer-untyi-char io-buffer)
(locally (declare (optimize (speed 3) (safety 0)))
(when-io-buffer-lock-grabbed ((ccl::io-buffer-lock io-buffer))
(funcall (ccl::io-buffer-listen-function io-buffer) stream io-buffer))))))))
(defmethod connection-established-p ((stream ccl::opentransport-stream))
(ccl::with-io-buffer-locked ((ccl::stream-io-buffer stream nil))
(let ((state (ccl::opentransport-stream-connection-state stream)))
(not (eq :unbnd state)))))
(defun wait-for-input-internal (wait-list &key timeout &aux result)
(labels ((ready-sockets (sockets)
(dolist (sock sockets result)
(when (cond ((stream-usocket-p sock)
(input-available-p (socket-stream sock)))
((stream-server-usocket-p sock)
(let ((ot-stream (first (socket-streams (socket sock)))))
(or (input-available-p ot-stream)
(connection-established-p ot-stream)))))
(push sock result)))))
(with-mapped-conditions ()
(ccl:process-wait-with-timeout
"socket input"
(when timeout (truncate (* timeout 60)))
#'ready-sockets
(wait-list-waiters wait-list)))
(nreverse result)))
;;; datagram socket methods
(defmethod initialize-instance :after ((usocket datagram-usocket) &key)
(with-slots (socket send-buffer recv-buffer) usocket
(setq send-buffer
(ccl::make-TUnitData (ccl::ot-conn-endpoint socket)))
(setq recv-buffer
(ccl::make-TUnitData (ccl::ot-conn-endpoint socket)))))
(defmethod socket-send ((usocket datagram-usocket) buffer size &key host port (offset 0))
(with-mapped-conditions (usocket)
(with-slots (socket send-buffer) usocket
(unless (and host port)
(unsupported 'host 'socket-send))
(ccl::send-message socket send-buffer buffer size host port offset))))
(defmethod socket-receive ((usocket datagram-usocket) buffer length &key)
(with-mapped-conditions (usocket)
(with-slots (socket recv-buffer) usocket
(ccl::receive-message socket recv-buffer buffer length))))
(defmethod socket-close ((socket datagram-usocket))
nil) ; TODO
|
