Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!gem.mps.ohio-state.edu!usc!snorkelwacker!spdcc!ftp!jbvb
From: jbvb@ftp.COM (James Van Bokkelen)
Newsgroups: comp.dcom.lans
Subject: Re: FTP Software
Summary: 32 native (not socket) descriptors easy, EADDRINUSE bug fixed in 2.04
Message-ID: <747@ftp.COM>
Date: 26 Oct 89 18:04:26 GMT
References: <1680@cod.NOSC.MIL>
Organization: FTP Software Inc., Cambridge, MA
Lines: 29

In article <1680@cod.NOSC.MIL>, neerma@cod.NOSC.MIL (Merle A. Neer) writes:
> 1. If we do connect to a foreign socket where no server is
>    listening, subsequent connects to the same socket will
>    return "socket in use"......we want to keep trying until
>    it opens.

This was a known problem in the v2.03 kernel, fixed in pl2 and later.  My
support people told this to someone at your site yesterday.

> 2. We want to perform what FTP Software calls a "hard-close"
>    that is, force the connection closed regardless of
>    any required TCP-timeouts.  The hard-close does not
>    work but the connection will time-out as usual.

If you must use the SOCKET library, set the SO_LINGER option with "optval"
pointing to a word of 0.  Otherwise, use net_abort().

> 3. Maximum # of descriptors is limited to 20 on DOS...
>    we need 32.

Can't be done with the SOCKET library (the sockets are mapped to DOS
file handles, and MSC won't let you have more than 20 of them in a
process; we will when MSC does). We recommend that you use the native
library and "global" network descriptors, where 32 descriptors work
just fine.

-- 
James B. VanBokkelen		26 Princess St., Wakefield, MA  01880
FTP Software Inc.		voice: (617) 246-0900  fax: (617) 246-0901