diff options
author | hrs <hrs@FreeBSD.org> | 2009-09-12 22:08:20 +0000 |
---|---|---|
committer | hrs <hrs@FreeBSD.org> | 2009-09-12 22:08:20 +0000 |
commit | 2eb62239d7432351eb544690c4ea2fc648ae2abc (patch) | |
tree | a8b68cd78a93144234b4c47ac70911fd744e48ff /usr.sbin/ndp | |
parent | 02e6d1c7f95b09e7d57ae3d261a65a3ea25aa637 (diff) | |
download | FreeBSD-src-2eb62239d7432351eb544690c4ea2fc648ae2abc.zip FreeBSD-src-2eb62239d7432351eb544690c4ea2fc648ae2abc.tar.gz |
Improve flexibility of receiving Router Advertisement and
automatic link-local address configuration:
- Convert a sysctl net.inet6.ip6.accept_rtadv to one for the
default value of a per-IF flag ND6_IFF_ACCEPT_RTADV, not a
global knob. The default value of the sysctl is 0.
- Add a new per-IF flag ND6_IFF_AUTO_LINKLOCAL and convert a
sysctl net.inet6.ip6.auto_linklocal to one for its default
value. The default value of the sysctl is 1.
- Make ND6_IFF_IFDISABLED more robust. It can be used to disable
IPv6 functionality of an interface now.
- Receiving RA is allowed if ip6_forwarding==0 *and*
ND6_IFF_ACCEPT_RTADV is set on that interface. The former
condition will be revisited later to support a "host + router" box
like IPv6 CPE router. The current behavior is compatible with
the older releases of FreeBSD.
- The ifconfig(8) now supports these ND6 flags as well as "nud",
"prefer_source", and "disabled" in ndp(8). The ndp(8) now
supports "auto_linklocal".
Discussed with: bz and jinmei
Reviewed by: bz
MFC after: 3 days
Diffstat (limited to 'usr.sbin/ndp')
-rw-r--r-- | usr.sbin/ndp/ndp.8 | 26 | ||||
-rw-r--r-- | usr.sbin/ndp/ndp.c | 7 |
2 files changed, 24 insertions, 9 deletions
diff --git a/usr.sbin/ndp/ndp.8 b/usr.sbin/ndp/ndp.8 index 70f5156..76f558c 100644 --- a/usr.sbin/ndp/ndp.8 +++ b/usr.sbin/ndp/ndp.8 @@ -29,7 +29,7 @@ .\" .\" $FreeBSD$ .\" -.Dd May 17, 1998 +.Dd September 2, 2009 .Dt NDP 8 .Os .\" @@ -182,11 +182,16 @@ NUD is usually turned on by default. Specify whether or not to accept Router Advertisement messages received on the .Ar interface . -Note that the kernel does not accept Router Advertisement messages -unless the -.Li net.inet6.ip6.accept_rtadv -variable is non-0, even if the flag is on. -This flag is set to 1 by default. +This flag is set by +.Va net.inet6.ip6.accept_rtadv +sysctl variable. +.It Ic auto_linklocal +Specify whether or not to perform automatic link-local address configuration +on +.Ar interface . +This flag is set by +.Va net.inet6.ip6.auto_linklocal +sysctl variable. .It Ic prefer_source Prefer addresses on the .Ar interface @@ -204,9 +209,8 @@ In the sending case, an error of ENETDOWN will be returned to the application. This flag is typically set automatically in the kernel as a result of a certain failure of Duplicate Address Detection. -While the flag can be set or cleared by hand with the -.Nm -command, it is not generally advisable to modify this flag manually. +If the auto_linklocal per-interface flag is set, automatic link-local +address configuration is performed again when this flag is cleared. .It Ic basereachable Ns Li = Ns Pq Ar number Specify the BaseReachbleTimer on the interface in millisecond. .It Ic retrans Ns Li = Ns Pq Ar number @@ -253,6 +257,10 @@ Most useful when used with The .Nm utility first appeared in the WIDE Hydrangea IPv6 protocol stack kit. +The +.Fl I Ar auto_linklocal +flag first appeared in +.Fx 8.0 . .\" .\" .Sh BUGS .\" (to be written) diff --git a/usr.sbin/ndp/ndp.c b/usr.sbin/ndp/ndp.c index 17e439c..b701ead 100644 --- a/usr.sbin/ndp/ndp.c +++ b/usr.sbin/ndp/ndp.c @@ -1004,6 +1004,9 @@ ifinfo(ifname, argc, argv) #ifdef ND6_IFF_ACCEPT_RTADV SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV); #endif +#ifdef ND6_IFF_AUTO_LINKLOCAL + SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL); +#endif #ifdef ND6_IFF_PREFER_SOURCE SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE); #endif @@ -1076,6 +1079,10 @@ ifinfo(ifname, argc, argv) if ((ND.flags & ND6_IFF_ACCEPT_RTADV)) printf("accept_rtadv "); #endif +#ifdef ND6_IFF_AUTO_LINKLOCAL + if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL)) + printf("auto_linklocal "); +#endif #ifdef ND6_IFF_PREFER_SOURCE if ((ND.flags & ND6_IFF_PREFER_SOURCE)) printf("prefer_source "); |