all the things i can imagine using this for, i can do with pf features.
ok.
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, [email protected], [email protected]
> BS Web Services, http://bsws.de
> Full-Service ISP - Secure Hosting, Mail and DNS Services
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