Date: Sat, 02 May 1998 23:43:05 +0100 From: Brian Somers <brian@Awfulhak.org> To: Luigi Rizzo <luigi@labinfo.iet.unipi.it> Cc: itojun@itojun.org (Jun-ichiro itojun Itoh), current@FreeBSD.ORG Subject: Re: Infrared ? (a simple experiment for laptop owners...) Message-ID: <199805022243.XAA12316@awfulhak.org> In-Reply-To: Your message of "Sat, 02 May 1998 17:22:50 %2B0200." <199805021522.RAA03142@labinfo.iet.unipi.it>
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> [forwarded to -mobile since it is probably relevant there --- i was > wondering how hard would it be to implement a 'lightweight' IrDA to > enable PPP between two FreeBSD laptops] > > > I've tried that several years before. > > > > If you open IR port as RS232C serial port (/dev/ttyd1), it will > > behave as half-duplex serial port. The port is strictly half-duplex, > > that is, if machine A and B send some bytes at the same time > > they will collide and junk byte will be received. > > actually it seems that receive is disabled while transmitting, but the > situation is no different from what you say. > What i was wondering, though, is if we could implement some quick and > dirty hack in iijppp to make it work. [.....] > This should be relatively easy to implement. Opinions ? I'd tend to implement some sort of half-duplex protocol layer at the ``struct physical'' layer in the new ppp (MP branch).... some relatively simple ``I've got control 'till I hand it over to you'' approach. It may even be useful to build something like that into the kernel - say as a line discipline. I haven't searched the rfcs.... > cheers > luigi > -----------------------------+-------------------------------------- > Luigi Rizzo | Dip. di Ingegneria dell'Informazione > email: luigi@iet.unipi.it | Universita' di Pisa > tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy) > fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/ > _____________________________|______________________________________ -- Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <brian@OpenBSD.org> <http://www.Awfulhak.org>; Don't _EVER_ lose your sense of humour.... To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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