Date: Fri, 13 Oct 2000 14:37:04 +0900 From: Jun Kuriyama <kuriyama@imgsrc.co.jp> To: FreeBSD-current@FreeBSD.ORG Subject: Re: Fragments refused by ipfw Message-ID: <7md7h55mkf.wl@waterblue.imgsrc.co.jp> In-Reply-To: In your message of "12 Oct 2000 07:13:47 GMT" <7mzokajzvo.wl@waterblue.imgsrc.co.jp> References: <7mzokajzvo.wl@waterblue.imgsrc.co.jp>
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At 12 Oct 2000 07:13:47 GMT,
Jun Kuriyama wrote:
> Host A is my desktop box (-current), host B is NFS server (3-stable).
> Sometimes (at heavy load on NFS?), my access to NFS server is locked.
> At that time, following messages are logged.
>
> ipfw: -1 Refuse UDP hostB hostA in via fxp0 Fragment = 925
>
> I used ipfw with default accept but no rules. I have not seen such
> message before.
I found ipfw_report(NULL, ..) is called at this point.
----- ip_fw.c:1305
bogusfrag:
if (fw_verbose)
ipfw_report(NULL, ip, rif, oif);
goto dropit;
}
-----
After some debug, PULLUP_TO() in case IPPROTO_UDP. Is reason for this
failing of m_pullup()?
----- ip_fw.c:1001
case IPPROTO_UDP :
PULLUP_TO(hlen + sizeof(struct udphdr));
udp =(struct udphdr *)((u_int32_t *)ip + ip->ip_hl);
dst_port = udp->uh_dport ;
src_port = udp->uh_sport ;
break;
-----
--
Jun Kuriyama <kuriyama@imgsrc.co.jp> // IMG SRC, Inc.
<kuriyama@FreeBSD.org> // FreeBSD Project
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