usocket-devel March 2010

usocket-devel@common-lisp.net

8 participants
6 discussions

[usocket-devel] How to portably setsockopt
by Elliott Slaughter 20 Jul '10

20 Jul '10

Hi, I need to set SO_BROADCAST in order to enable sending packets to a broadcast address in my application. In SBCL, for example, this can be accomplished with (setf (sb-bsd-sockets:sockopt-broadcast (usocket::socket *socket*)) t) I am wondering if usocket provides any way of accomplishing this, and if this is considered inside the scope of usocket. Thanks. -- Elliott Slaughter "Don't worry about what anybody else is going to do. The best way to predict the future is to invent it." - Alan Kay

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Re: [usocket-devel] Status of UDP on Windows?
by Elliott Slaughter 03 Apr '10

03 Apr '10

It seems that your response missed the mailing list. 2010/3/22 Chun Tian (binghe) <binghe.lisp(a)gmail.com> Strange ... for long time I thought there's no "select()" on win32, and I do > see Erik (USOCKET author) use "WSAEventSelect" to implement the LispWorks > version of WAIT-FOR-INTPUT-INTERNAL on win32. Now it seems that I was > confused by another the speciality of "select()" function on win32: > > * On UNIX, select() can be used to wait for both networking sockets and > disk file handlers, > * On Windows, select() can only be used on networking sockets, so it's > implemented by winsock library. > > What you found, seems show me a very direct way to have all you want done > immediately: just use SB-ALIEN to export the "select()" for win32, and > remove the reader macro around exist Unix version of WAIT-FOR-INPUT-INTERNAL > for SBCL. > > Would you like a try on this approach? > I'll give it a shot. Thanks (to both you and Erik) for the information. -- Elliott Slaughter "Don't worry about what anybody else is going to do. The best way to predict the future is to invent it." - Alan Kay

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[usocket-devel] Announcing ip-interfaces (was: Re: Determining the local host address from wildcard host)
by Elliott Slaughter 02 Apr '10

02 Apr '10

On Mon, Mar 8, 2010 at 12:08 PM, Elliott Slaughter < elliottslaughter(a)gmail.com> wrote: > On Mon, Mar 8, 2010 at 10:50 AM, R. Matthew Emerson <rme(a)clozure.com>wrote: > >> >> On Mar 7, 2010, at 2:36 PM, Elliott Slaughter wrote: >> >> > What I am actually trying to do is to search for other nodes on the >> local network which are also running my application. My idea was to >> construct one or more broadcast addresses, send UDP packets to each of them, >> and listen for responses. This may not be the best way to go about this (and >> suggestions would be appreciated), but if I choose this route, I would want >> to know the IP address of each of the interfaces together with its subnet >> mask. >> > >> > On 2010-03-07, at 07:20 , Elliott Slaughter wrote: >> > >> > if you really need this, you might look at the implementation for >> %get-ip-interfaces in clozure. >> > it uses getifaddrs in a fairly transparent manner, so, if you're >> unix-based, you should be ok with it. >> > >> > I need this to work on Windows and *nix, which is why I can't use IOlib >> or other Unix-based solutions. That said, Clozure does run on Windows, so >> hopefully the code you mentioned has already been ported. >> >> There's an internal function ccl::%get-ip-interfaces that's >> conditionalized for a bunch of platforms. I can't really recommend that you >> use it, of course, but it might be something to look at. >> > > I glanced over the source briefly, and might give porting it to CFFI a shot > when I can find some free time. > I've ported the code to CFFI, and tested on SBCL, CCL, ECL, and Allegro on Mac OS X, SBCL on Linux, and SBCL on Windows. The source code is available as a darcs repository at: http://common-lisp.net/~eslaughter/darcs/ip-interfaces/ The code is licensed under the LLGPL to maximize license compatibility with Clozure CL. -- Elliott Slaughter "Don't worry about what anybody else is going to do. The best way to predict the future is to invent it." - Alan Kay

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[usocket-devel] Status of UDP on Windows?
by Elliott Slaughter 22 Mar '10

22 Mar '10

Hi, I would really like to use UDP sockets on Windows, so I'm wondering if someone can tell me what needs to be done for it to work on a minimal set of platforms (at least SBCL, and Clozure CL would be nice). I am willing to contribute time and code for the next week or so if someone can direct me to what needs work. Thanks. -- Elliott Slaughter "Don't worry about what anybody else is going to do. The best way to predict the future is to invent it." - Alan Kay

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Re: [usocket-devel] Determining the local host address from wildcard host
by Elliott Slaughter 08 Mar '10

08 Mar '10

On Sun, Mar 7, 2010 at 8:02 AM, james anderson <james.anderson(a)setf.de>wrote: > good evening; > > i asked chun tian about this some while ago and he didn't think it was > necessary as the 0.0.0.0 address suffices for most purposes. > Yes, for listening for messages, the 0.0.0.0 is quite sufficient. What I am actually trying to do is to search for other nodes on the local network which are also running my application. My idea was to construct one or more broadcast addresses, send UDP packets to each of them, and listen for responses. This may not be the best way to go about this (and suggestions would be appreciated), but if I choose this route, I would want to know the IP address of each of the interfaces together with its subnet mask. On 2010-03-07, at 07:20 , Elliott Slaughter wrote: > > if you really need this, you might look at the implementation for > %get-ip-interfaces in clozure. > it uses getifaddrs in a fairly transparent manner, so, if you're > unix-based, you should be ok with it. > I need this to work on Windows and *nix, which is why I can't use IOlib or other Unix-based solutions. That said, Clozure does run on Windows, so hopefully the code you mentioned has already been ported. I'm wondering if there is any way to determine the local host address (or >> addresses) used when I create a socket with :local-host *wildcard-host* . >> When I try to call get-local-address on such a socket, I just get #(0 0 0 >> 0). >> >> Thanks. >> > -- Elliott Slaughter "Don't worry about what anybody else is going to do. The best way to predict the future is to invent it." - Alan Kay

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[usocket-devel] Determining the local host address from wildcard host
by Elliott Slaughter 07 Mar '10

07 Mar '10

Hi, I'm wondering if there is any way to determine the local host address (or addresses) used when I create a socket with :local-host *wildcard-host* . When I try to call get-local-address on such a socket, I just get #(0 0 0 0). Thanks. -- Elliott Slaughter "Don't worry about what anybody else is going to do. The best way to predict the future is to invent it." - Alan Kay

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usocket-devel March 2010