On Sat, Apr 02, 2011 at 10:56:06PM +1000, David Gwynne wrote:
> all the things i can imagine using this for, i can do with pf features.
>
> ok.
>
Fine with me.
> On 02/04/2011, at 10:49 PM, Henning Brauer wrote:
>
> > lo has that link1 wankery where it kind of replies to all addresses in
> > the subnet, except that it doesn't really - it is very halfbaked and
> > gets in the way. unless somebody has a VERY convincing reason to keep
> > this it'll be gone in a few.
> > we'll be able to use the fast rb tree lookup in in_aiwithaddr after
> > this.
> >
> > Index: sys/netinet/ip_input.c
> > ===================================================================
> > RCS file: /cvs/src/sys/netinet/ip_input.c,v
> > retrieving revision 1.186
> > diff -u -p -r1.186 ip_input.c
> > --- sys/netinet/ip_input.c 11 Feb 2011 12:16:30 -0000 1.186
> > +++ sys/netinet/ip_input.c 2 Apr 2011 12:44:12 -0000
> > @@ -688,10 +688,7 @@ in_iawithaddr(struct in_addr ina, struct
> > TAILQ_FOREACH(ia, &in_ifaddr, ia_list) {
> > if (ia->ia_ifp->if_rdomain != rdomain)
> > continue;
> > - if ((ina.s_addr == ia->ia_addr.sin_addr.s_addr) ||
> > - ((ia->ia_ifp->if_flags & (IFF_LOOPBACK|IFF_LINK1)) ==
> > - (IFF_LOOPBACK|IFF_LINK1) &&
> > - ia->ia_net == (ina.s_addr & ia->ia_netmask)))
> > + if (ina.s_addr == ia->ia_addr.sin_addr.s_addr)
> > return ia;
> > /* check ancient classful too, e. g. for rarp-based netboot */
> > if (((ip_directedbcast == 0) || (m && ip_directedbcast &&
> > Index: share/man/man4/lo.4
> > ===================================================================
> > RCS file: /cvs/src/share/man/man4/lo.4,v
> > retrieving revision 1.26
> > diff -u -p -r1.26 lo.4
> > --- share/man/man4/lo.4 31 May 2007 19:19:50 -0000 1.26
> > +++ share/man/man4/lo.4 2 Apr 2011 12:44:12 -0000
> > @@ -70,33 +70,6 @@ The loopback should
> > .Em never
> > be configured first unless no hardware
> > interfaces exist.
> > -.Pp
> > -Configuring a loopback interface for
> > -.Xr inet 4
> > -with the
> > -.Em link1
> > -flag set will make the interface answer to the whole set of
> > -addresses identified as being in super-net which is specified
> > -by the address and netmask.
> > -Obviously you should not set the
> > -.Em link1
> > -flag on interface
> > -.Nm lo0 ,
> > -but instead use another interface like
> > -.Nm lo1 .
> > -.Sh EXAMPLES
> > -.Bd -literal
> > -# ifconfig lo1 create
> > -# ifconfig lo1 inet 192.168.1.1 netmask 255.255.255.0 link1
> > -.Ed
> > -.Pp
> > -is equivalent to:
> > -.Bd -literal
> > -# ifconfig lo1 create
> > -# awk 'BEGIN {for(i=1;i<255;i++) \e
> > - print "ifconfig lo1 inet 192.168.1."i" netmask 255.255.255.255 alias"}'|
> \e
> > - sh
> > -.Ed
> > .Sh DIAGNOSTICS
> > .Bl -diag
> > .It lo%d: can't handle af%d.
> > @@ -116,16 +89,8 @@ The
> > .Nm
> > device appeared in
> > .Bx 4.2 .
> > -.Pp
> > -The wildcard functionality first appeared in
> > -.Ox 2.3 .
> > .Sh BUGS
> > Previous versions of the system enabled the loopback interface
> > automatically, using a non-standard Internet address (127.1).
> > Use of that address is now discouraged; a reserved host address
> > for the local network should be used instead.
> > -.Pp
> > -Care should be taken when using NAT with interfaces that have the
> > -.Em link1
> > -flag set, because it may believe the packets are coming from a
> > -loopback address.
> >
> >
> > --
> > Henning Brauer, h...@bsws.de, henn...@openbsd.org
> > BS Web Services, http://bsws.de
> > Full-Service ISP - Secure Hosting, Mail and DNS Services
> > Dedicated Servers, Rootservers, Application Hosting
>
--
:wq Claudio
