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Wed, 24 Mar 2021 18:45:02 +0000 X-IncomingTopHeaderMarker: OriginalChecksum:BC0A720BC4140BF2DAC062B55B2E316C3AE51ECE22E727DF1931DDE282C6CE4E;UpperCasedChecksum:52A7809CBA0CE434F2C4E76E030B6138B9DD2753514DAD7BCB5F29A4A651E66C;SizeAsReceived:8454;Count:44 Received: from SJ0PR03MB5581.namprd03.prod.outlook.com ([fe80::ed0b:679f:905f:4c94]) by SJ0PR03MB5581.namprd03.prod.outlook.com ([fe80::ed0b:679f:905f:4c94%6]) with mapi id 15.20.3955.027; Wed, 24 Mar 2021 18:45:02 +0000 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Subject: Re: [PATCH ucspi-vsock] vsockclient: allow null application From: "Cole Helbling" To: "Alyssa Ross" , Date: Wed, 24 Mar 2021 11:44:40 -0700 Message-ID: In-Reply-To: <20210324182433.19110-1-hi@alyssa.is> X-TMN: [qz3BG9zEloHcDQriyvTPQzkAMElSIx7B] X-ClientProxiedBy: SJ0PR05CA0132.namprd05.prod.outlook.com (2603:10b6:a03:33d::17) To SJ0PR03MB5581.namprd03.prod.outlook.com (2603:10b6:a03:27b::20) X-Microsoft-Original-Message-ID: MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost (73.48.197.220) by SJ0PR05CA0132.namprd05.prod.outlook.com (2603:10b6:a03:33d::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3977.15 via Frontend Transport; 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no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-config-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header X-Mailman-Version: 3.3.1 Precedence: list List-Id: Patches and low-level development discussion Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: On Wed Mar 24, 2021 at 11:24 AM PDT, Alyssa Ross wrote: > I found myself running > > vsockclient 2 1024 true > > in a situation where it just mattered that a connection was made, and > no data needed to be exchanged of it. That I found myself doing this > is quite a strong indicator that the program to exec into should be > optional. > > UCSPI-1996[1] doesn't specify what should happen if no application is > provided, so I think this is a reasonable interpretation. I'm not > sure if I feel the same for vsockserver(d), so I haven't made the > corresponding change there. I'll wait to see if there's ever a need > for it. > > [1]: https://cr.yp.to/proto/ucspi.txt > --- > vsockclient.c | 11 +++++++---- > 1 file changed, 7 insertions(+), 4 deletions(-) Reviewed-by: Cole Helbling