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Date: Wed, 22 Oct 2008 21:10:27 +0200 From: Jarek Poplawski <jarkao2@...il.com> To: Ferenc Wagner <wferi@...f.hu> CC: netdev@...r.kernel.org Subject: Re: IP-less bridge as a martian source Jarek Poplawski wrote, On 10/22/2008 07:22 PM: > Ferenc Wagner wrote, On 10/22/2008 05:00 PM: > >> Ferenc Wagner <wferi@...f.hu> writes: >> >>> I expected an IP-less bridge interface to pick up no IP packets, but >>> apparently this isn't the case: broadcast packets with destination >>> address 255.255.255.255 are reported as martians by the 2.6.18 >>> kernel, which I find counterintuitive (I know 2.6.18 is rather old, >>> but that's the one supported by Xen). >>> >>> 1. Is this the expected behaviour? > > > I think so, and this thread pertains to something similar: > http://marc.info/?l=linux-netdev&m=122456602708727&w=2 Sorry! I didn't check this before writing. This: 1941 static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr, 1942 u8 tos, struct net_device *dev) 1943 { ... 1963 /* IP on this device is disabled. */ 1964 1965 if (!in_dev) 1966 goto out; 1967 1968 /* Check for the most weird martians, which can be not detected 1969 by fib_lookup. 1970 */ means something else, so with IP disabled you shouldn't have any martians! (And this is old code.) Jarek P. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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