Date: Thu, 24 May 2012 16:30:14 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r235916 - head/sys/netinet6 Message-ID: <201205241630.q4OGUEnd048360@svn.freebsd.org>
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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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