Author: ume
Date: Wed Jan 9 18:18:08 2013
New Revision: 245230
URL: http://svnweb.freebsd.org/changeset/base/245230
Log:
Add no_prefer_iface option.
It stops treating the address on the interface as special by source
address selection rule even when the interface is outgoing interface.
This is desired in some situation.
Requested by: hrs
Reviewed by: IHANet folks including hrs
MFC after: 1 week
Modified:
head/sbin/ifconfig/af_inet6.c
head/sbin/ifconfig/af_nd6.c
head/sbin/ifconfig/ifconfig.8
head/sys/netinet6/in6_src.c
head/sys/netinet6/nd6.h
head/usr.sbin/ndp/ndp.8
head/usr.sbin/ndp/ndp.c
Modified: head/sbin/ifconfig/af_inet6.c
==============================================================================
--- head/sbin/ifconfig/af_inet6.c Wed Jan 9 17:09:06 2013
(r245229)
+++ head/sbin/ifconfig/af_inet6.c Wed Jan 9 18:18:08 2013
(r245230)
@@ -473,6 +473,8 @@ static struct cmd inet6_cmds[] = {
DEF_CMD("-nud", -ND6_IFF_PERFORMNUD, setnd6flags),
DEF_CMD("auto_linklocal",ND6_IFF_AUTO_LINKLOCAL,setnd6flags),
DEF_CMD("-auto_linklocal",-ND6_IFF_AUTO_LINKLOCAL,setnd6flags),
+ DEF_CMD("no_prefer_iface",ND6_IFF_NO_PREFER_IFACE,setnd6flags),
+ DEF_CMD("-no_prefer_iface",-ND6_IFF_NO_PREFER_IFACE,setnd6flags),
DEF_CMD_ARG("pltime", setip6pltime),
DEF_CMD_ARG("vltime", setip6vltime),
DEF_CMD("eui64", 0, setip6eui64),
Modified: head/sbin/ifconfig/af_nd6.c
==============================================================================
--- head/sbin/ifconfig/af_nd6.c Wed Jan 9 17:09:06 2013 (r245229)
+++ head/sbin/ifconfig/af_nd6.c Wed Jan 9 18:18:08 2013 (r245230)
@@ -58,7 +58,7 @@ static const char rcsid[] =
#define MAX_SYSCTL_TRY 5
#define ND6BITS "\020\001PERFORMNUD\002ACCEPT_RTADV\003PREFER_SOURCE" \
"\004IFDISABLED\005DONT_SET_IFROUTE\006AUTO_LINKLOCAL" \
- "\007NO_RADR\020DEFAULTIF"
+ "\007NO_RADR\010NO_PREFER_IFACE\020DEFAULTIF"
static int isnd6defif(int);
void setnd6flags(const char *, int, int, const struct afswtch *);
Modified: head/sbin/ifconfig/ifconfig.8
==============================================================================
--- head/sbin/ifconfig/ifconfig.8 Wed Jan 9 17:09:06 2013
(r245229)
+++ head/sbin/ifconfig/ifconfig.8 Wed Jan 9 18:18:08 2013
(r245230)
@@ -28,7 +28,7 @@
.\" From: @(#)ifconfig.8 8.3 (Berkeley) 1/5/94
.\" $FreeBSD$
.\"
-.Dd November 7, 2012
+.Dd January 10, 2013
.Dt IFCONFIG 8
.Os
.Sh NAME
@@ -716,6 +716,13 @@ Set a flag to enable Neighbor Unreachabi
.It Cm -nud
Clear a flag
.Cm nud .
+.It Cm no_prefer_iface
+Set a flag to not prefer address on the interface as candidates of the
+source address for outgoing packets, even when the interface is
+outgoing interface.
+.It Cm -no_prefer_iface
+Clear a flag
+.Cm no_prefer_iface .
.El
.Pp
The following parameters are specific to cloning
Modified: head/sys/netinet6/in6_src.c
==============================================================================
--- head/sys/netinet6/in6_src.c Wed Jan 9 17:09:06 2013 (r245229)
+++ head/sys/netinet6/in6_src.c Wed Jan 9 18:18:08 2013 (r245230)
@@ -383,10 +383,12 @@ in6_selectsrc(struct sockaddr_in6 *dstso
*/
/* Rule 5: Prefer outgoing interface */
- if (ia_best->ia_ifp == ifp && ia->ia_ifp != ifp)
- NEXT(5);
- if (ia_best->ia_ifp != ifp && ia->ia_ifp == ifp)
- REPLACE(5);
+ if (!(ND_IFINFO(ifp)->flags & ND6_IFF_NO_PREFER_IFACE)) {
+ if (ia_best->ia_ifp == ifp && ia->ia_ifp != ifp)
+ NEXT(5);
+ if (ia_best->ia_ifp != ifp && ia->ia_ifp == ifp)
+ REPLACE(5);
+ }
/*
* Rule 6: Prefer matching label
Modified: head/sys/netinet6/nd6.h
==============================================================================
--- head/sys/netinet6/nd6.h Wed Jan 9 17:09:06 2013 (r245229)
+++ head/sys/netinet6/nd6.h Wed Jan 9 18:18:08 2013 (r245230)
@@ -86,6 +86,7 @@ struct nd_ifinfo {
#define ND6_IFF_DONT_SET_IFROUTE 0x10
#define ND6_IFF_AUTO_LINKLOCAL 0x20
#define ND6_IFF_NO_RADR 0x40
+#define ND6_IFF_NO_PREFER_IFACE 0x80 /* XXX: not related to ND. */
#define ND6_CREATE LLE_CREATE
#define ND6_EXCLUSIVE LLE_EXCLUSIVE
Modified: head/usr.sbin/ndp/ndp.8
==============================================================================
--- head/usr.sbin/ndp/ndp.8 Wed Jan 9 17:09:06 2013 (r245229)
+++ head/usr.sbin/ndp/ndp.8 Wed Jan 9 18:18:08 2013 (r245230)
@@ -29,7 +29,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd July 9, 2012
+.Dd Jan 10, 2013
.Dt NDP 8
.Os
.\"
@@ -192,6 +192,15 @@ on
This flag is set by
.Va net.inet6.ip6.auto_linklocal
sysctl variable.
+.It Ic no_prefer_iface
+The address on the outgoing interface is preferred by source addess
+selection rule.
+If this flag is set, stop treating the address on the
+.Ar interface
+as special even when the
+.Ar interface
+is outgoing interface.
+The default value of this flag is off.
.It Ic disabled
Disable IPv6 operation on the interface.
When disabled, the interface discards any IPv6 packets
Modified: head/usr.sbin/ndp/ndp.c
==============================================================================
--- head/usr.sbin/ndp/ndp.c Wed Jan 9 17:09:06 2013 (r245229)
+++ head/usr.sbin/ndp/ndp.c Wed Jan 9 18:18:08 2013 (r245230)
@@ -982,6 +982,9 @@ ifinfo(ifname, argc, argv)
#ifdef ND6_IFF_AUTO_LINKLOCAL
SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
#endif
+#ifdef ND6_IFF_NO_PREFER_IFACE
+ SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
+#endif
SETVALUE("basereachable", ND.basereachable);
SETVALUE("retrans", ND.retrans);
SETVALUE("curhlim", ND.chlim);
@@ -1055,6 +1058,10 @@ ifinfo(ifname, argc, argv)
if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
printf("auto_linklocal ");
#endif
+#ifdef ND6_IFF_NO_PREFER_IFACE
+ if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
+ printf("no_prefer_iface ");
+#endif
}
putc('\n', stdout);
#undef ND
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