Author: yongari
Date: Tue May 13 05:07:03 2014
New Revision: 265942
URL: http://svnweb.freebsd.org/changeset/base/265942
Log:
Fix checksum computation. Previously it didn't include carry.
Reviewed by: tuexen
Modified:
head/sys/netinet/ip_input.c
Modified: head/sys/netinet/ip_input.c
==============================================================================
--- head/sys/netinet/ip_input.c Mon May 12 23:35:10 2014 (r265941)
+++ head/sys/netinet/ip_input.c Tue May 13 05:07:03 2014 (r265942)
@@ -1080,8 +1080,9 @@ found:
* (and not in for{} loop), though it implies we are not going to
* reassemble more than 64k fragments.
*/
- m->m_pkthdr.csum_data =
- (m->m_pkthdr.csum_data & 0xffff) + (m->m_pkthdr.csum_data >> 16);
+ while (m->m_pkthdr.csum_data & 0xffff0000)
+ m->m_pkthdr.csum_data = (m->m_pkthdr.csum_data & 0xffff) +
+ (m->m_pkthdr.csum_data >> 16);
#ifdef MAC
mac_ipq_reassemble(fp, m);
mac_ipq_destroy(fp);
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