Author: bz
Date: Thu May 24 16:30:13 2012
New Revision: 235916
URL: http://svn.freebsd.org/changeset/base/235916
Log:
MFp4 bz_ipv6_fast:
Introduce in6_getscope() to allow more effective checksum
computations without the need to copy the address to clear the
scope.
Sponsored by: The FreeBSD Foundation
Sponsored by: iXsystems
Reviewed by: gnn (as part of the whole)
MFC After: 3 days
Modified:
head/sys/netinet6/scope6.c
head/sys/netinet6/scope6_var.h
Modified: head/sys/netinet6/scope6.c
==============================================================================
--- head/sys/netinet6/scope6.c Thu May 24 16:11:51 2012 (r235915)
+++ head/sys/netinet6/scope6.c Thu May 24 16:30:13 2012 (r235916)
@@ -494,3 +494,16 @@ in6_clearscope(struct in6_addr *in6)
return (modified);
}
+
+/*
+ * Return the scope identifier or zero.
+ */
+uint16_t
+in6_getscope(struct in6_addr *in6)
+{
+
+ if (IN6_IS_SCOPE_LINKLOCAL(in6) || IN6_IS_ADDR_MC_INTFACELOCAL(in6))
+ return (in6->s6_addr16[1]);
+
+ return (0);
+}
Modified: head/sys/netinet6/scope6_var.h
==============================================================================
--- head/sys/netinet6/scope6_var.h Thu May 24 16:11:51 2012
(r235915)
+++ head/sys/netinet6/scope6_var.h Thu May 24 16:30:13 2012
(r235916)
@@ -54,6 +54,7 @@ int sa6_embedscope __P((struct sockaddr_
int sa6_recoverscope __P((struct sockaddr_in6 *));
int in6_setscope __P((struct in6_addr *, struct ifnet *, u_int32_t *));
int in6_clearscope __P((struct in6_addr *));
+uint16_t in6_getscope(struct in6_addr *);
#endif /* _KERNEL */
#endif /* _NETINET6_SCOPE6_VAR_H_ */
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