route(8): group RTF_GATEWAY and ~RTF_GATEWAY (-iface).

While here, tweak RTF_GATEWAY description. Passive voice elsewhere in
this table is used to talk about the routes themselves, while here
it's about packets.

route(8): be consistent about capitalization.

route(8): don't split -blackhole and -noblackhole.

Document 'L'

Remove references to XNS

branches: 1.60.4; 1.60.6;
Use Ex.

Remove workaround for ancient HTML generation code.

Remove unnecessary Pp.

Support -c <count> option for route monitor

route command exits if it receives <count> routing messages where
<count> is a value specified by -c.

The option is useful to get only particular message(s) in a test script.

branches: 1.56.8;
Separate nexthop caches from the routing table

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

Add RTF_BROADCAST to mark routes used for the broadcast address when
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.

Teach route(8) about RTF_LOCAL.

Complete the routing argument table by including the ID's used in the routing
display.

PR/47704: Takahiro HAYASHI: Add -L flag

Now that the code can support tags and verbose route printing, enable them.
Also document previously undocumented flags.

Remove esis reference

english usage patrol

Add -tag description as suggested in PR/45071

Retire OSI network stack. OK core@

branches: 1.46.6;
Move RTF_ANNOUNCE flag so that it no longer conflicts with RTF_PROTO2.

RTF_ANNOUNCE was defined as RTF_PROTO2. The flag is used to indicated
that host should act as a proxy for a link level arp or ndp request.
(If RTF_PROTO2 is used as an experimental flag (as advertised),
various problems can occur.)

This commit provides a first-class definition with its own bit for
RTF_ANNOUNCE, removes the old aliasing definitions, and adds support
for the new RTF_ANNOUNCE flag to netstat(8) and route(8).,

Also, remove unused RTF_ flags that collide with RTF_PROTO1:
netinet/icmp6.h defined RTF_PROBEMTU as RTF_PROTO1
netinet/if_inarp.h defined RTF_USETRAILERS as RTF_PROTO1
(Neither of these flags are used anywhere. Both have been removed
to reduce chances of collision with RTF_PROTO1.)

Figuring this out and the diff are the work of Beverly Schwartz of
BBN.

(Passed release build, boot in VM, with no apparently related atf
failures.)

Approved for Public Release, Distribution Unlimited
This material is based upon work supported by the Defense Advanced
Research Projects Agency and Space and Naval Warfare Systems Center,
Pacific, under Contract No. N66001-09-C-2073.

branches: 1.45.2;
prune stray commas

Whitespace nit.

Mention -mpls and -tag and xref mpls(4)
bin/45071

xref link_addr for -link.

branches: 1.41.4;
PR/40455: Mihai Chelaru: Add noreject noblackhole options

Bump date for previous.

Document -nocloning, -nocloned flags. Shift a couple of columns
right by a character width, to make room for the new flags.

Use default option order (AaBbCc...).

PR/32632: Yves-Emmanuel JUTARD: Improvment suggestion in 'route' display.
Add a new -S flag that prints a space for missing flags.

correct typo. PR misc/22944

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22308, verified by myself.

Bump date for flushall description.

This is an updated submitted patch originally written by Jim Rees
and sent in by Greg Hudson as seen in PR misc/3227. Basically what it
does is adds a flushall option which deletes all but localhost routes.
This is done by andoring in a flag called doall (1 means do all routes
including gateway, 0 means do a regular flush). I have seen some
platforms that do this. I tested it out on ipv4 only, it works as
advertised. Commit was approved by christos@.

permit foo/bar notation, like "route add 10.0.0.0/8 127.0.0.1".
originally by provos

Split .Nm with other macro arguments on two lines.

New sentence, new line. From Robert Elz.

branches: 1.29.2;
the modifiers (-inet6, ...) do not only affect the behaviour of "flush",
but at least also of "get", so make the wording a bit more general.

Generate <>& symbolically. I'm avoiding .../dist/... directories for now.

Punctuation fix, sort sections, sort SEE ALSO.

Provide a short output format for the get command that only prints the
address corresponding to RTA_GATEWAY, or nothing if it doesn't exist.
Modify the exit value of route depending on this, so that one can do
stuff like:

#!/bin/sh
gw=`route -sn get default 2>/dev/null`
if [ -z "$gw" ]; then
echo no default route
exit 1
fi
ping -w1 -c1 $gw >/dev/null 2>&1
if ! route -sn get $gw >/dev/null; then
echo default gateway not responding
exit 1
fi
echo default gateway is at $gw

PR/14286: reed@reedmedia.net: Explain default.

make prefixlen work on IPv4 too

Fix Nd and some whitespace and punctuation.

Drop arguments of .Os.

Added a few examples and a reference to sysctl to enable IP forwarding
Approved by Christos

support -cloned command line flag.
i don't think anyone ever going to use it.

tweak IPv6 case so that "route show" does not truncate numeric IPv6 address.

PR: 7955

IPv6-ready route command (-inet6 and -prefixlen are added)

Remove spurious .ne's.

Typo fixed

* implement -f; flush all routes before executing command
* reset af to 0 in flushroutes() and newroute()
* cleanup -DSMALL:
- `flush' and AF_APPLETALK is supported (the latter had partial support)
- AF_NS, AF_ISO, and AF_CCITT are not supported at all (rather than being
- partially unsupported).

fix bad .Xr references

resolve conflicts from lite-2 import

* cleanup for WARNS=1
* use .Nm correctly
* deprecate register
* getopt returns -1 not EOF

fix numerous tyops and use some -mdoc macros to advantage

comment out xref to XNSrouted(8)

- Add netatalk bits
- Add prototypes
- Fix printf formats

Remove uid checks since the kernel now handles this and route(1) is no
longer setuid.
Document the "Permission denied" msg in the man page since this is
_slightly_ less clear than route(1)'s old error msg.

As discussed some time ago, add a "show" sub-command.
Also allow compilation with -DSMALL to ommit support for
non-essential protocols (i.e. when built into a ramdisk).
Use a less hack-ish way to generate keywords.[ch] and just
check in the result (helps ../../distrib/utils/x_route).

convert to new RCS Id conventions; reduce my headache

Clean up import.

Add RCS indentifiers.

changed "Id" to "Header" for rcsids

added rcs ids to all files

branches: 1.1.1;
Initial revision