Date: Mon, 26 May 2008 12:36:28 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Kris Kennaway <kris@freebsd.org> Cc: freebsd-hackers@freebsd.org, Steven Hartland <killing@multiplay.co.uk> Subject: Re: Using sendmsg for SCM_CREDS results in EINVAL on PF_INET socket Message-ID: <200805261936.m4QJaS7Q074045@apollo.backplane.com> References: <BCBAE9EA84D54762AD983B29B2752492@multiplay.co.uk> <483B05DB.3000309@FreeBSD.org>
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:> using the following code to send credentials to a remote host
:> results in EINVAL from sendmsg.
:>
:> I suspect that SCM_CREDS is only valid for PF_LOCAL / PF_UNIX
:> sockets and not PF_INET sockets and hence the code in dbus
:> is actually invalid.
:>
:> Can anyone confirm this is the case or not?
:
:What would it even mean to send credentials to a remote host over an
:AF_INET socket?
:
:Kris
The only way to do it is to do a connect-back to a secure port. In
otherwords, to use the identd protocol.
Control messages like SCM_CREDS (and descriptor passing for that matter)
only work over local protocol sockets.
-Matt
Matthew Dillon
<dillon@backplane.com>
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