Date: Wed, 21 Nov 2001 17:32:27 -0800 (PST) From: Paul Herman <pherman@frenchfries.net> To: <freebsd-net@freebsd.org> Cc: <freebsd-alpha@freebsd.org> Subject: arp_rtrequest: bad gateway value Message-ID: <20011121171802.P23581-100000@tick.sc.omation.com>
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Hi,
I'd like to pick some brains before I file a PR.
I've got 4.4-RELEASE running on FreeBSD-alpha with more than one
alias on my network interface. I decided to try out routed, and
started noticing gobs and gobs of messages:
Nov 15 11:38:10 tick /kernel: arp_rtrequest: bad gateway value
Nov 15 11:43:10 tick /kernel: arp_rtrequest: bad gateway value
Nov 15 11:47:59 tick /kernel: arp_rtrequest: bad gateway value
Nov 15 11:58:02 tick last message repeated 2 times
Nov 15 12:08:10 tick last message repeated 2 times
Nov 15 12:18:10 tick last message repeated 2 times
It turns out, this is caused by a bad arp entry:
17:21:33{{ttyq8}pherman@tick}~//> arp -a
ns1.sc.omation.com (192.168.128.1) at 0:0:0:0:0:0 permanent [ethernet] rt=200
tick.sc.omation.com (192.168.128.2) at 0:60:97:6e:6e:92 permanent [ethernet]
[...etc...]
Trying to delete the entry gives me "cannot locate 192.168.128.1",
probably because the kernel thinks it doesn't exist becase the
MAC addr == NULL... ...perhaps (?) Whatever, it shouldn't be there
in the first place.
So, I've narrowed this down to when routed it writes RTM_CHANGE
of type RTF_HOST in sbin/routed/table.c:725
if (mask == HOST_MASK) {
w.w_rtm.rtm_flags |= RTF_HOST;
w.w_rtm.rtm_msglen -= sizeof(w.w_mask);
} else {
w.w_rtm.rtm_addrs |= RTA_NETMASK;
w.w_mask.sin_addr.s_addr = htonl(mask);
Something is going haywire (64bit issues?) because when I change
this to
if (mask == HOST_MASK && 0) {
it works fine, but I'm sure I'm breaking something. :-) There
*is* a sizeof(long) just after it on line 734 which should be a
sizeof(u_int32_t), but that doesn't change anything in this case.
This obviously works fine on 32-bit architectures, so I'm thinking
it's some kind of alignment or sizeof problem, but I don't see it.
Can anyone comment on this?
-Paul.
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