Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!shadooby!gumby!peirce From: peirce@gumby.cc.wmich.edu (Leonard J. Peirce) Newsgroups: news.software.anu-news Subject: Re: Problem feeding ANU-News V5.8 from Ultrix via DECNET Message-ID: <882@gumby.cc.wmich.edu> Date: 6 Oct 89 15:17:40 GMT References: <8910030303.AA09598@uunet.uu.net> Reply-To: peirce@gumby.cc.wmich.edu (Leonard J. Peirce) Organization: Western Michigan University, Kalamazoo, MI Lines: 32 In article <8910030303.AA09598@uunet.uu.net> Geoff Huston writes: >>I have installed ANU-News V5.8 on a VAX running VMS 4.7 and am trying to >>feed it from an Ultrix V3.0 system running News V2.11. After the text of >>the first article is transferred to VMS, the connection seems to die. It >>appears that Ultrix is waiting for a response (perhaps the 235 message). > [...] >The implementation of DECnet on Ultrix is prone to sync errors - >The Ultrix DECnet NNTP connection was investigated by Leonard Peirce (as I >remember) about 12 months ago, and the trick used then was to include >IO$M_MULTIPLE on the channel READ QIO's on the VMS side. The problem is that the DECnet NNTP implementations on VMS and ULTRIX use different socket types. The VMS NNTP uses DECnet sequenced packet sockets and the ULTRIX DECnet NNTP uses stream sockets. Using the IO$M_MULTIPLE qualifier on the QIO's makes the VMS side use stream sockets and things work fine. I had the same problem with things hanging and Matt Thomas (who wrote the NNTP DECnet support for ULTRIX) set me straight about the problems that can occur when using different socket types. Geoff has included the stream socket support for DECnet NNTP in ANU News 5.8A although it isn't the default to maintain compatability. You have to rebuild and with DECNETSTREAM #defined for it to be turned on. Also realize that DECnet stream I/O is only available in VMS 5.0 and beyond. In order to use it, you'll have to upgrade. :-( -- Leonard J. Peirce Internet: peirce@gumby.cc.wmich.edu Western Michigan University peirce@gw.wmich.edu Academic Computer Center UUCP: ...!uunet!sharkey!wmichgw!peirce Kalamazoo, MI 49008 Phone: (616) 387-5469