svn commit: r350882 - head/sys/contrib/ipfilter/netinet

Cy Schubert cy at FreeBSD.org
Mon Aug 12 02:42:48 UTC 2019


Author: cy
Date: Mon Aug 12 02:42:47 2019
New Revision: 350882
URL: https://svnweb.freebsd.org/changeset/base/350882

Log:
  Initialize the frentry (the control block that defines a rule) checksum
  to zero. Matching checksums save time and effort by mitigating the need
  for full rule compare.
  
  MFC after:	3 days

Modified:
  head/sys/contrib/ipfilter/netinet/fil.c

Modified: head/sys/contrib/ipfilter/netinet/fil.c
==============================================================================
--- head/sys/contrib/ipfilter/netinet/fil.c	Sun Aug 11 23:54:52 2019	(r350881)
+++ head/sys/contrib/ipfilter/netinet/fil.c	Mon Aug 12 02:42:47 2019	(r350882)
@@ -4973,7 +4973,7 @@ frrequest(softc, unit, req, data, set, makecopy)
 	 * (this meaning no pointers are included).
 	 */
 	pp = (u_int *)(fp->fr_caddr + fp->fr_dsize);
-	for (p = (u_int *)fp->fr_data; p < pp; p++)
+	for (fp->fr_cksum = 0, p = (u_int *)fp->fr_data; p < pp; p++)
 		fp->fr_cksum += *p;
 
 	WRITE_ENTER(&softc->ipf_mutex);


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