From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oa1-x35.google.com (mail-oa1-x35.google.com [IPv6:2001:4860:4864:20::35]) by sourceware.org (Postfix) with ESMTPS id E98753858CDB for ; Sat, 8 Oct 2022 13:20:15 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org E98753858CDB Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=dinwoodie.org Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=dinwoodie.org Received: by mail-oa1-x35.google.com with SMTP id 586e51a60fabf-1322d768ba7so8298344fac.5 for ; Sat, 08 Oct 2022 06:20:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dinwoodie.org; s=google; h=content-transfer-encoding:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=0SdeXwIt9sQwzOxRtHEO2vAnH4peuLxLvPByXbfZlsg=; b=gZvZvgL/zX9Q04IdKaqe+L8WRjlDKGkPvECh2eIAxWl+SfwV5BD7uCFH5ZjngTybWn bMhTzOhhKK0xMkXVZIB4ATAy4DvuUJPaRsLWmTXPbUc1O+n2ZWPhf/n5+kVkDlV6pEp0 05wgQDl+iZbxbkPJQKFoU3I8KcAEYwz9MqKQg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=0SdeXwIt9sQwzOxRtHEO2vAnH4peuLxLvPByXbfZlsg=; b=FRDpNZs582ec62kd/ta/mM0jUxBw+TKErwnUzbmftXR+KjRkYqDg3KiUSZxdNYIQeV LAhGGxXCmcQsmz837eXBKLpDgyco4WxJDQ7n+K+/HTwWBW290HGwv/WAGR3k1a856Prx 4AhvwSdw/fHiHPqz/gkfYWrsmGZMeIo9c3gjdubL5uLhorXzwuTqdScvVOfBAXC4CuOz pZ/WxgURlDL+5jE4P7QoX5VEZ60W77CLPxjJeiKqZSCyOCsvFn924d0jrf3PaknUsaiC r/aW2RfAetR2RsN9yqVRP/1sRSGg32XdKlEvZLvD+j8SQGvLhx2yLdBLHm4hb2dM6ih2 DiKg== X-Gm-Message-State: ACrzQf3A56CG89v686QVtX7AfftjGFgV08rK8LaeGwpV9X9NS8enPAj/ rqyZAma9jEFtYFIQfpwXzydffUUKjLjAgcfhhJnPUb/fmEw= X-Google-Smtp-Source: AMsMyM5YAKxJMx4xz/pZNkoQgQvhF4jVughNEsv7AdhdcT16N5zQLiCW0kN0xmdc0pQ4O5B/tZLafTeZbdjed34gVDw= X-Received: by 2002:a05:6870:c391:b0:10c:a937:aaf1 with SMTP id g17-20020a056870c39100b0010ca937aaf1mr5071344oao.272.1665235215207; Sat, 08 Oct 2022 06:20:15 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Adam Dinwoodie Date: Sat, 8 Oct 2022 14:19:41 +0100 Message-ID: Subject: Re: Feature request: File descriptor support by sockets. To: "cygwin@cygwin.com" Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-0.2 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On Thu, 6 Oct 2022 at 18:37, Darren Whobrey wrote: > > Hi, I'm using the latest version of Cygwin (3.3.6) and the Cygwin OpenSSH= (OpenSSH_9.0p1, OpenSSL 1.1.1q 5 Jul 2022) version of ssh to talk to host= s using ControlMaster connection sharing. This uses sockets behind the scen= es. When ControlMaster is set to no, the connection is successful. > > Ssh connections are failing at the point where IO starts to be forwarded = to the host. > > Here's a snippet of log output from "ssh -vvv some-host": > > > > When successful connections are made from an OL7 client (with older versi= on of OpenSSH, but mux commands are similar), comparative logs are: > > > > According to this web posting, it suggests the bug lies with "file descri= ptors over unix sockets do not work in Cygwin": > https://exchangetuts.com/is-ssh-controlmaster-with-cygwin-on-windows-actu= ally-possible-1639696447917488 > > Is this something that can be fixed? I'm very confident it *can* be fixed! But this gap has existed since at least 2009 (see https://cygwin.com/pipermail/cygwin/2012-February/199995.html and https://sourceware.org/legacy-ml/cygwin/2009-10/msg00397.html) so I suspect that, unless you're proposing to do the work or pay someone to do it on your behalf, it's unlikely to happen any time soon.