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| author | bz <bz@FreeBSD.org> | 2012-05-24 16:30:13 +0000 |
|---|---|---|
| committer | bz <bz@FreeBSD.org> | 2012-05-24 16:30:13 +0000 |
| commit | bbf3b9348d561c7c86b6ff80193ad674bff7fc93 (patch) | |
| tree | 931acd617b74dd34db6841b9b7b8b291d18d8950 /sys/netinet6 | |
| parent | f67d641e11eb8ebebd9116cc13cf592131a3a0cb (diff) | |
| download | FreeBSD-src-bbf3b9348d561c7c86b6ff80193ad674bff7fc93.zip FreeBSD-src-bbf3b9348d561c7c86b6ff80193ad674bff7fc93.tar.gz | |
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
Diffstat (limited to 'sys/netinet6')
| -rw-r--r-- | sys/netinet6/scope6.c | 13 | ||||
| -rw-r--r-- | sys/netinet6/scope6_var.h | 1 |
2 files changed, 14 insertions, 0 deletions
diff --git a/sys/netinet6/scope6.c b/sys/netinet6/scope6.c index 8189d87..7a1a04b 100644 --- a/sys/netinet6/scope6.c +++ b/sys/netinet6/scope6.c @@ -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); +} diff --git a/sys/netinet6/scope6_var.h b/sys/netinet6/scope6_var.h index 8ec6f10..2248037 100644 --- a/sys/netinet6/scope6_var.h +++ b/sys/netinet6/scope6_var.h @@ -54,6 +54,7 @@ int sa6_embedscope __P((struct sockaddr_in6 *, int)); 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_ */ |
