Date: Thu, 27 Apr 2000 01:07:55 +0100 From: Nik Clayton <nik@freebsd.org> To: Joseph Jacobson <jacobson@pobox.com> Cc: Nik Clayton <nik@FreeBSD.ORG>, hackers@FreeBSD.ORG Subject: Re: No route for 127/8 to lo0 (?) Message-ID: <20000427010755.A67291@catkin.nothing-going-on.org> In-Reply-To: <200004242328.TAA07013@home.my.domain>; from jacobson@pobox.com on Mon, Apr 24, 2000 at 07:28:32PM -0400 References: <20000421200201.A34984@catkin.nothing-going-on.org> <200004242328.TAA07013@home.my.domain>
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On Mon, Apr 24, 2000 at 07:28:32PM -0400, Joseph Jacobson wrote: > See RFC1122, section 3.2.1.3, available at > http://www.cis.ohio-state.edu/htbin/rfc/rfc1122.html > http://www.faqs.org/rfcs/rfc1122.html Right. Assuming we're looking at the same section, it says: [...] (g) { 127, <any> } Internal host loopback address. Addresses of this form MUST NOT appear outside a host. [...] which is the only discussion of 127/8 I see in that document. The behaviour I'm seeing is that packets to 127.255.255.255 (i.e., broadcasts on the 127/8 net) are being sent out the default route, because on FreeBSD (at least, FreeBSD 3-stable), there's only a host route for 127.0.0.1, not a network route. Per the RFC, that's incorrect behaviour, right? The RFC also says: For most purposes, a datagram addressed to a broadcast or multicast destination is processed as if it had been addressed to one of the host's IP addresses; Is there some special-case for 127/8 that's covered by the "For most purposes" line? Cheers, N -- Internet connection, $19.95 a month. Computer, $799.95. Modem, $149.95. Telephone line, $24.95 a month. Software, free. USENET transmission, hundreds if not thousands of dollars. Thinking before posting, priceless. Somethings in life you can't buy. For everything else, there's MasterCard. -- Graham Reed, in the Scary Devil Monastery To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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