The following reply was made to PR kern/29544; it has been noted by GNATS.

From: john heasley <heas@shrubbery.net>
To: gnats-bugs@netbsd.org
Cc: kern-bug-people@netbsd.org, gnats-admin@netbsd.org,
	netbsd-bugs@netbsd.org
Subject: Re: kern/29544: NFS server broken in -current
Date: Sat, 5 Mar 2005 02:08:47 +0000

 This seems to fix them problem, where the w/ Jason's patch, the first
 fragment did not have the header length.
 
 Index: ip_output.c
 ===================================================================
 RCS file: /cvsroot/src/sys/netinet/ip_output.c,v
 retrieving revision 1.144
 diff -u -r1.144 ip_output.c
 --- ip_output.c	26 Feb 2005 22:45:12 -0000	1.144
 +++ ip_output.c	5 Mar 2005 02:07:25 -0000
 @@ -978,6 +978,7 @@
  			KASSERT((m->m_pkthdr.csum_flags & M_CSUM_IPv4) == 0);
  		} else {
  			m->m_pkthdr.csum_flags |= M_CSUM_IPv4;
 +			m->m_pkthdr.csum_data |= hlen << 16;
  		}
  		ipstat.ips_ofragments++;
  		fragments++;
 @@ -997,6 +998,7 @@
  		m->m_pkthdr.csum_flags &= ~M_CSUM_IPv4;
  	} else {
  		KASSERT(m->m_pkthdr.csum_flags & M_CSUM_IPv4);
 +		m->m_pkthdr.csum_data |= hlen << 16;
  	}
  sendorfree:
  	/*
 @@ -1038,7 +1040,7 @@
  	if (csum == 0 && (m->m_pkthdr.csum_flags & M_CSUM_UDPv4) != 0)
  		csum = 0xffff;
  
 -	offset += m->m_pkthdr.csum_data;	/* checksum offset */
 +	offset += M_CSUM_DATA_IPv4_OFFSET(m->m_pkthdr.csum_data);
  
  	if ((offset + sizeof(u_int16_t)) > m->m_len) {
  		/* This happen when ip options were inserted