Messages in this thread |  | | Date | Wed, 05 Sep 2001 14:25:29 -0400 | From | "Christopher Friesen" <> | Subject | Re: ioctl SIOCGIFNETMASK: ip alias bug 2.4.9 and 2.2.19 |
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Matthias Andree wrote:
> Wietse Venema and I are wondering about different Linux 2.2/2.4 and > FreeBSD 4.4-RC behaviour when using ioctls to figure interface netmasks, > FreeBSD gets it right, Linux 2.4.9 and 2.4.9-ac7 get it wrong, and from > looking at the source, I think, Linux 2.2.19 gets it wrong as well.
> Looking at Linux' Kernel source, Linux 2.4.9 compares just the ifr_name, > /usr/src/linux/net/ipv4/devinet.c, function devinet_ioctl, ll. 463 ff. > in 2.4.9, so Linux always returns the mask for the first address, not > the mask for the requested address. This doesn't matter as long as > eth0:0-style aliases are configured with ifconfig, but it does matter as > soon as ip comes into play and both addresses are assigned to eth0 > rather than eth0 and eth0:0.
I think the silence you are hearing from the lkml is a bunch of people thinking "Oh, crap!".
Chris
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