From owner-freebsd-hackers  Thu Dec  6 10:28:59 2001
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Date: Thu, 6 Dec 2001 12:28:55 -0600 (CST)
From: mark tinguely <tinguely@web.cs.ndsu.nodak.edu>
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To: freebsd@hoolan.org, tinguely@web.cs.ndsu.nodak.edu,
	tinguely@web.cs.ndsu.nodak.edu, tlambert2@mindspring.com
Subject: Re: UDP checksum error after encapsulating multicast packet
Cc: freebsd-hackers@FreeBSD.ORG
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the len and offset have been put in net order, but the len is then
assumed to be in host order:

in sys/netinet:

--- ip_mroute.c.orig	Thu Jul 19 01:37:26 2001
+++ ip_mroute.c	Thu Dec  6 12:26:25 2001
@@ -1595,6 +1595,7 @@
      */
     ip = (struct ip *)((caddr_t)ip_copy + sizeof(multicast_encap_iphdr));
     --ip->ip_ttl;
+    len = ip->ip_len;
     HTONS(ip->ip_len);
     HTONS(ip->ip_off);
     ip->ip_sum = 0;
@@ -1605,7 +1606,7 @@
     if (vifp->v_rate_limit == 0)
 	tbf_send_packet(vifp, mb_copy);
     else
-	tbf_control(vifp, mb_copy, ip, ip_copy->ip_len);
+	tbf_control(vifp, mb_copy, ip, len);
 }
 
 /*

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