(-ia) and comment in the code where this is missing?
XXX: should that be an ioctl or sysctl? provide getifmultiaddrs() via the
routing socket? I guess since this is just for netstat a simple sysctl or
ioctl would suffice. I lean towards sysctl.
By this change, nexthop caches (IP-MAC address pair) are not stored
in the routing table anymore. Instead nexthop caches are stored in
each network interface; we already have lltable/llentry data structure
for this purpose. This change also obsoletes the concept of cloning/cloned
routes. Cloned routes no longer exist while cloning routes still exist
with renamed to connected routes.
Noticeable changes are:
- Nexthop caches aren't listed in route show/netstat -r
- sysctl(NET_RT_DUMP) doesn't return them
- If RTF_LLDATA is specified, it returns nexthop caches
- Several definitions of routing flags and messages are removed
- RTF_CLONING, RTF_XRESOLVE, RTF_LLINFO, RTF_CLONED and RTM_RESOLVE
- RTF_CONNECTED is added
- It has the same value of RTF_CLONING for backward compatibility
- route's -xresolve, -[no]cloned and -llinfo options are removed
- -[no]cloning remains because it seems there are users
- -[no]connected is introduced and recommended
to be used instead of -[no]cloning
- route show/netstat -r drops some flags
- 'L' and 'c' are not seen anymore
- 'C' now indicates a connected route
- Gateway value of a route of an interface address is now not
a L2 address but "link#N" like a connected (cloning) route
- Proxy ARP: "arp -s ... pub" doesn't create a route
You can know details of behavior changes by seeing diffs under tests/.
Proposed on tech-net and tech-kern:
http://mail-index.netbsd.org/tech-net/2016/03/11/msg005701.html
src/usr.bin/netstat relies on code from src/sbin/route. WHen building
with -DSMALL, some functions such as mpls_ntoa() or p_rtrmx() are not
built in src/sbin/route. We therefore have to make sure they are not
used in src/usr.bin/netstat.
they are created on the fly. This makes it clear what the route is for
and allows an optimisation in ip_output() by avoiding a call to
in_broadcast() because most of the time we do talk to a host.
It also avoids a needless allocation for the storage of llinfo_arp and
thus vanishes from arp(8) - it showed as incomplete anyway so this
is a nice side effect.
Guard against this and routes marked with RTF_BLACKHOLE in
ip_fastforward().
While here, guard against routes marked with RTF_BLACKHOLE in
ip6_fastforward().
RTF_BROADCAST is IPv4 only, so don't bother checking that here.
nowadays sysctl(3) is the default information retrieval method.
- Fix description about default value for -N; it is no longer a single value
these days, so just say see kvm_openfiles(3) rahter than repeating
several lines description here.
internal route statistics. Restore the old kmem route printing code that
was not just used for post-mortem displays. Reported by kardel@, test by
netstat -nrvf inet
While here fix ipv6 pcb printing by making tcp6_dump with tcp.
XXX: Merge the inet and the inet6 code. It is silly to need to specify
-p tcp6 to print a tcp6 pcb, we already know what it is.
