April 2008 - usocket-devel - mailman3.common-lisp.net

[usocket-devel] UDP support in usocket, ideas explained
by Erik Huelsmann 03 Oct '08

03 Oct '08

When looking at usocket.lisp, you'll find there is a datagram-usocket class commented out. I think this class (even without any additional slot definitions) should be used for UDP sockets. Then there's datagram-usocket-p, which should start returning T when the passed in object is a true descendant of DATAGRAM-USOCKET. Looking further, you'll find there are functions defined for creating stream and stream-server objects. A function like that should be created for UDP sockets. I think it's only sane to extend WAIT-FOR-INPUT to apply to UDP sockets as well as any of the currently supported sockets. The LispWorks variant of this function (for win32) is still on my laptop. I'll try to finish it up soon, so that you can all start testing it. I propose we implement recv()/recvfrom() as one function: SOCKET-RECEIVE. I think we shouldn't bother implementing recv() and recvfrom() as separate interfaces: I think we should return the recvfrom-address field as the second return value of SOCKET-RECEIVE. I also propose we implement send()/sendto() as one function: SOCKET-SEND. I think we should provide the sendto address as an optional parameter to the SOCKET-SEND function. Also, I think the function should check for connected-ness of the datagram socket. If the sendto address is specified on a connected socket AND the address specified is unequal to the connected address, the function should error. Oh. One last thing: local and peer address retrieval functions should be adapted to apply to UDP sockets as well as the currently supported stream sockets. I hope this is all a bit clear! If you have (m)any questions, please don't hesitate to ask. Bye, Erik.

2 9

[usocket-devel] Fwd: [usocket-cvs] r245 - usocket/trunk/backend
by Erik Huelsmann 23 Jul '08

23 Jul '08

Hi Douglas, I recently added some functionality in usocket and even though I think I could have copy-pasted from the CMU backend, I want to verify with you if this is true. The functions I added: - get-host-name (as you can see in the commit mail below based on copy-paste from CMU) - wait-for-input-internal which I didn't copy-paste yet. I would be especially gratefull if you could copy-paste and verify the latter for me and optionally even supply a patch. For testing of the multiplexing code, I use this 'script': (load "asdf.lisp") (asdf:oos 'asdf:load-op :usocket) (defvar sockets nil) (defparameter crlf (format nil "~C~C" #\Return #\Linefeed)) (defparameter host "mirror.w3media.nl") (defparameter offset-path "/apache") (dotimes (i 10) (let ((s (usocket:socket-connect host 80))) (format (usocket:socket-stream s) "GET http://~A~A/httpd/httpd-2.0.~A.tar.gz HTTP/1.0~%~%" host offset-path (+ 50 i)) (force-output (usocket:socket-stream s)) (push s sockets))) (let ((buffer (make-array 8192 :element-type 'character))) (loop (let ((ready (usocket:wait-for-input sockets :timeout 15))) (unless ready (sleep 1) (format t "No ready sockets!~%")) (dolist (r ready) (format t "Reading from ~A~%" r) (read-sequence buffer (usocket:socket-stream r)))))) HTH and thanks for your reaction in advance! bye, Erik. ---------- Forwarded message ---------- From: ehuelsmann(a)common-lisp.net <ehuelsmann(a)common-lisp.net> Date: May 18, 2007 12:03 AM Subject: [usocket-cvs] r245 - usocket/trunk/backend To: usocket-cvs(a)common-lisp.net Author: ehuelsmann Date: Thu May 17 18:03:55 2007 New Revision: 245 Modified: usocket/trunk/backend/scl.lisp Log: Add cl-smtp 'requirement': get-host-name (SCL backend); needs verification. Modified: usocket/trunk/backend/scl.lisp ============================================================================== --- usocket/trunk/backend/scl.lisp (original) +++ usocket/trunk/backend/scl.lisp Thu May 17 18:03:55 2007 @@ -129,3 +129,6 @@ (t (error 'ns-unknown-error :host-or-ip name :real-error errno)))))))) + +(defun get-host-name () + (unix:unix-gethostname)) _______________________________________________ usocket-cvs mailing list usocket-cvs(a)common-lisp.net http://common-lisp.net/cgi-bin/mailman/listinfo/usocket-cvs

4 8

[usocket-devel] CLISP problems
by leslie.polzer＠gmx.net 24 Apr '08

24 Apr '08

Hello, CLISP 2.41 gives me the following: ;; Loading file /home/sky/.sbcl/site/usocket-0.3.5/backend/clisp.fas ... ** - Continuable Error FFI::FIND-FOREIGN-FUNCTION: foreign function "gethostname" does not exist Changing backend/clisp.lisp thus (in pseudo-diff format): (FFI:DEF-CALL-OUT get-host-name-internal (:name "gethostname") (:arguments (name (FFI:C-PTR (FFI:C-ARRAY-MAX ffi:character 256)) :OUT :ALLOCA) (len ffi:int)) #+win32 (:library "WS2_32") + #+unix (:library "libc.so.6") (:language #-win32 :stdc #+win32 :stdc-stdcall) (:return-type ffi:int)) helps on my system. Is there some rationale behind the non-working code? And is there a particular reason that usocket doesn't use CFFI? Thanks! :) Leslie

3 2

[usocket-devel] Patch: Fix SYSCALLS loading on OpenMCL
by Hans Hübner 16 Apr '08

16 Apr '08

Hi, please consider this patch: http://bknr.net/trac/changeset/2795?format=diff&new=2795 It fixes loading of system calls for Linux and FreeBSD. I have opened a bug with Clozure to make them move to a unified system call loading interface so that applications do not need to dispatch on an architecture symbol, but until that went into CCL, the fix should be fine. Thanks, Hans

2 8

[usocket-devel] Timeouts in usocket?
by Hans Hübner 09 Apr '08

09 Apr '08

Hi, are there any concrete plans to support timeouts in usocket? CL implementations begin to provide both relative timeouts or absolute deadlines in their low level socket implementations, and it would be nice to be able to use them without having to resort to hacking usocket in application specific ways. In particular, SOCKET-CONNECT needs a timeout argument. If there are no current plans, I'll add timeouts to my list and add them. -Hans

2 1