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History log of /src/tests/net/arp
RevisionDateAuthorComments
 1.4 24-Nov-2016  ozaki-r Reduce duplicate codes

Introduce net_common.sh that is to share common functions used in tests
for networking. This commit commonizes extract_new_packets. Other duplicate
codes will be moved to the file in further commits.
 1.3 30-Jul-2015  ozaki-r branches: 1.3.2;
Fix TESTS_SH assignment
 1.2 30-Jul-2015  ozaki-r Add tests for IPv4 DAD
 1.1 29-Jul-2015  ozaki-r Add tests for ARP
 1.3.2.1 07-Jan-2017  pgoyette Sync with HEAD. (Note that most of these changes are simply $NetBSD$
tag issues.)
 1.49 18-Aug-2025  ozaki-r tests: add tests for ARP address resolution
 1.48 09-Sep-2024  ozaki-r branches: 1.48.2;
tests: add tests for ARP cache entry creations
 1.47 09-Sep-2024  ozaki-r tests: dedup t_arp.sh like others (NFC)
 1.46 20-Aug-2024  ozaki-r tests, arp: add tests for GARP on link up
 1.45 18-Sep-2020  roy branches: 1.45.6; 1.45.8;
arp tests: Delete ARP entry after failed ping test

As it might hang around in WAITDELETE for a few seconds.
 1.44 17-Sep-2020  roy arp_rtm: Only ping once

Pointless doing 10 pings.
On a slow system, it's possible that many RTM_MISS messages could
overflow into the next test.
 1.43 15-Sep-2020  roy Don't check lifetime when testing published
 1.42 13-Sep-2020  roy arp test: Use the ndp cache expiration test in place of the old one

As the logic is the same.
While here, GC some variables and comment out a redundant sleep.
 1.41 11-Mar-2020  roy tests: check RTA_AUTHOR in messages
 1.40 09-Sep-2019  roy t_arp: Wait for 10 seconds for RTM_MISS

Let's try increasing the ping timeout to try and fix PR misc/54525.
 1.39 03-Sep-2019  roy tests: fix ARP and NDP tests for RTM_* messages

While here add tests for RTM_MISS.
 1.38 19-Aug-2019  ozaki-r tests: use rump_server_add_iface to create interfaces
 1.37 13-May-2019  bad branches: 1.37.2;
Get rid of all the -lrumpdev and -lrumpvfs that are no longer needed
after moving rump's mainbus from rumpdev to rumpkern.

Produces the same atf-run results as before.
 1.36 06-Apr-2018  ozaki-r branches: 1.36.2;
Add tests for GARP without DAD

Additionally make the existing tests for GARP more explicit.
 1.35 06-Apr-2018  ozaki-r Improve packet checks and error reporting
 1.34 23-Nov-2017  kre branches: 1.34.2;
Clean up the arp_rtm subtest...

1. Be assertive when claiming the pid of the background route monitor command,
not polite... (ie: $! will give you the pid, $? is just 0 there).
2. Since "wait 0" simply (always) exits with status 127, immediately (we
know without thinking that we have no child with pid 0) the waits were
ineffective - now (after fix #1) they work .. which requires the
route monitor that watches the arp -d to exit after 1 message, not 2,
as 1 is all it gets. (If there really should be 2, someone needs to
find out why the kernel is sending only 1 - I am not that someone).
3. The file contents need to be read only once, no matter how many patterns
we need to look for, save some work, and do it that way (this is not
really a bug,m but saving time for the ATF tests is always a good thing.)

Not sure if this will stop it randomly failing on bablyon5, but it might.
(The likely cause is that the "route.monitor" has not flushed its stdout
buffers at the time the "grep -A 3" [aside: why that way to read the file??]
is performed, so fails to find its expected output ... the route monitor would
get an extra message once interfaces start being destroyed, I assume, and
would exit then, flushing its buffer, but by then it is too late.
If that is/was the cause, then it should be fixed now.)
 1.33 28-Jun-2017  ozaki-r Enable to remove multiple ARP/NDP entries for one destination

The kernel can have multiple ARP/NDP entries which have an indentical
destination on different interfaces. This is normal and can be
reproduce easily by ping -I or ping6 -S. We should be able to remove
such entries.

arp -d <ip> and ndp -d <ip> are changed to fetch all ARP/NDP entries
and remove matched entries. So we can remove multiple entries
described above. This fetch all and selective removal behavior is
the same as arp <ip> and ndp <ip>; they also do fetch all entries
and show only matched entries.

Related to PR 51179
 1.32 28-Jun-2017  ozaki-r Restore ARP/NDP entries to route show and netstat -r

Requested by dyoung@ some time ago
 1.31 28-Jun-2017  ozaki-r Drop RTF_LLINFO flag (now it's RTF_LLDATA) from local routes

They don't have llinfo anymore. And also the change fixes unexpected
behavior of ARP proxy.
 1.30 26-Jun-2017  ozaki-r Drop RTF_UP from a routing message of a deleted ARP/NDP entry
 1.29 26-Jun-2017  ozaki-r Improve backward compatibility of (fake) routing messages on adding an ARP/NDP entry

A message originally included only DST and GATEWAY. Restore it.
 1.28 26-Jun-2017  ozaki-r Fix usage of routing messages on arp -d and ndp -d

It didn't work as we expected; we should set RTA_GATEWAY not
RTA_IFP on RTM_GET to return an if_index and the kernel should
use it on RTM_DELETE.
 1.27 22-Jun-2017  ozaki-r Test implicit removals of ARP/NDP entries

One test case reproudces PR 51179.
 1.26 21-Jun-2017  ozaki-r Don't create a permanent L2 cache entry on adding an address to an interface

It was created to copy FreeBSD, however actually the cache isn't
necessary. Remove it to simplify the code and reduce the cost to
maintain it (e.g., keep a consistency with a corresponding local
route).
 1.25 21-Jun-2017  ozaki-r Set net.inet.arp.keep only if it's required
 1.24 19-Jun-2017  ozaki-r Add missing declarations for cleanup
 1.23 16-Jun-2017  ozaki-r Test routing messages emitted on operations of ARP/NDP entries
 1.22 25-Nov-2016  ozaki-r branches: 1.22.6;
Share rump_server start/stop and interface creation/destruction functions

The common functions store socks of rump_servers, interfaces of rump_servers
and buses that intefaces connect and allow to destroy them with common
functions without specifying which socks, interfaces and buses we should
destroy.

This change reduces lots of similar setup/cleanup codes.
 1.21 24-Nov-2016  ozaki-r Move get_macaddr to net_common.sh
 1.20 24-Nov-2016  ozaki-r Move HIJACKING definition to net_common.sh
 1.19 24-Nov-2016  ozaki-r Reduce duplicate codes

Introduce net_common.sh that is to share common functions used in tests
for networking. This commit commonizes extract_new_packets. Other duplicate
codes will be moved to the file in further commits.
 1.18 07-Nov-2016  ozaki-r Accept DEBUG environment variable

By doing so, we can easily turn DEBUG on/off without modifying
the ATF scripts.
 1.17 23-Aug-2016  christos no functional change
 1.16 21-Jun-2016  ozaki-r branches: 1.16.2;
Make a bunch of test names self-descriptive
 1.15 18-Apr-2016  ozaki-r Add a test case for static ARP

It tests receiving an ARP request that has a spa (i.e., IP address) whose
ARP entry already exists in the table as a static ARP entry.
 1.14 04-Apr-2016  ozaki-r 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
 1.13 04-Mar-2016  ozaki-r Improve tests of proxy arp

The tests make it clear how it behaves though, I don't know if the current
behavior is what it should be.
 1.12 29-Feb-2016  ozaki-r Add tests on activating a new MAC address
 1.11 25-Feb-2016  ozaki-r Add basic tests for Proxy ARP

The tests don't much enough and need more realitic tests, for example
tests for a setup using ppp found in PR 44032.
 1.10 02-Dec-2015  ozaki-r Make checks strict

rump.arp should fail with File exists (EEXIST).
 1.9 31-Aug-2015  ozaki-r Reflect the current ARP cache implementation in tests

net.inet.arp.prune and net.inet.arp.refresh were obsoleted.
 1.8 13-Aug-2015  ozaki-r Reflect a fix on rt_refcnt

The test was adjusted based on wrong behavior.
 1.7 07-Aug-2015  ozaki-r Check MAC address of ARP caches additionally
 1.6 31-Jul-2015  ozaki-r Return 0 explicitly to avoid unexpected failures when $DEBUG=false
 1.5 31-Jul-2015  ozaki-r Add tests of cache overwriting
 1.4 31-Jul-2015  ozaki-r Add tests for temp option
 1.3 30-Jul-2015  ozaki-r Add tests for arp -a option
 1.2 30-Jul-2015  ozaki-r Add tests for GARP
 1.1 29-Jul-2015  ozaki-r Add tests for ARP
 1.16.2.1 07-Jan-2017  pgoyette Sync with HEAD. (Note that most of these changes are simply $NetBSD$
tag issues.)
 1.22.6.2 08-Apr-2018  snj Pull up following revision(s) (requested by ozaki-r in ticket #701):
sys/netinet/in.c: 1.227
sys/netinet6/in6.c: 1.265
tests/net/arp/t_arp.sh: 1.35-1.36
Make GARP work again when DAD is disabled
The change avoids setting an IP address tentative on initializing it when
the IPv4 DAD is disabled (net.inet.ip.dad_count=0), which allows a GARP packet
to be sent (see arpannounce). This is the same behavior of NetBSD 7, i.e.,
before introducing the IPv4 DAD.
Additionally do the same change to IPv6 DAD for consistency.
The change is suggested by roy@
--
Improve packet checks and error reporting
--
Add tests for GARP without DAD
Additionally make the existing tests for GARP more explicit.
 1.22.6.1 07-Jul-2017  martin Pull up following revision(s) (requested by ozaki-r in ticket #107):
usr.sbin/arp/arp.c: revision 1.56
sys/net/rtsock.c: revision 1.218
sys/net/if_llatbl.c: revision 1.20
usr.sbin/arp/arp.c: revision 1.57
sys/net/rtsock.c: revision 1.219
sys/net/if_llatbl.c: revision 1.21
usr.sbin/arp/arp.c: revision 1.58
tests/net/net_common.sh: revision 1.19
sys/netinet6/nd6.h: revision 1.84
sys/netinet6/nd6.h: revision 1.85
tests/net/arp/t_arp.sh: revision 1.23
sys/netinet6/in6.c: revision 1.246
tests/net/arp/t_arp.sh: revision 1.24
sys/netinet6/in6.c: revision 1.247
tests/net/arp/t_arp.sh: revision 1.25
sys/netinet6/in6.c: revision 1.248
tests/net/arp/t_arp.sh: revision 1.26
usr.sbin/ndp/ndp.c: revision 1.49
tests/net/arp/t_arp.sh: revision 1.27
tests/net/ndp/t_ndp.sh: revision 1.20
tests/net/arp/t_arp.sh: revision 1.28
tests/net/ndp/t_ndp.sh: revision 1.21
tests/net/arp/t_arp.sh: revision 1.29
tests/net/ndp/t_ndp.sh: revision 1.22
tests/net/ndp/t_ndp.sh: revision 1.23
tests/net/route/t_flags6.sh: revision 1.13
tests/net/ndp/t_ndp.sh: revision 1.24
tests/net/route/t_flags6.sh: revision 1.14
tests/net/ndp/t_ndp.sh: revision 1.25
tests/net/route/t_flags6.sh: revision 1.15
tests/net/ndp/t_ndp.sh: revision 1.26
sbin/route/rtutil.c: revision 1.9
tests/net/ndp/t_ndp.sh: revision 1.27
tests/net/ndp/t_ndp.sh: revision 1.28
tests/net/net/t_ipv6address.sh: revision 1.14
tests/net/ndp/t_ra.sh: revision 1.28
tests/net/ndp/t_ndp.sh: revision 1.29
sys/net/route.h: revision 1.113
tests/net/ndp/t_ra.sh: revision 1.29
sys/net/rtsock.c: revision 1.220
sys/net/rtsock.c: revision 1.221
sys/net/rtsock.c: revision 1.222
sys/net/rtsock.c: revision 1.223
tests/net/route/t_route.sh: revision 1.13
sys/net/rtsock.c: revision 1.224
sys/net/route.c: revision 1.196
sys/net/if_llatbl.c: revision 1.19
sys/net/route.c: revision 1.197
sbin/route/route.c: revision 1.156
tests/net/route/t_flags.sh: revision 1.16
tests/net/route/t_flags.sh: revision 1.17
usr.sbin/ndp/ndp.c: revision 1.50
tests/net/route/t_flags.sh: revision 1.18
sys/netinet/in.c: revision 1.204
tests/net/route/t_flags.sh: revision 1.19
sys/netinet/in.c: revision 1.205
tests/net/arp/t_arp.sh: revision 1.30
tests/net/arp/t_arp.sh: revision 1.31
sys/net/if_llatbl.h: revision 1.11
tests/net/arp/t_arp.sh: revision 1.32
sys/net/if_llatbl.h: revision 1.12
tests/net/arp/t_arp.sh: revision 1.33
sys/netinet6/nd6.c: revision 1.233
sys/netinet6/nd6.c: revision 1.234
sys/netinet/if_arp.c: revision 1.251
sys/netinet6/nd6.c: revision 1.235
sys/netinet/if_arp.c: revision 1.252
sbin/route/route.8: revision 1.57
sys/net/rtsock.c: revision 1.214
sys/net/rtsock.c: revision 1.215
sys/net/rtsock.c: revision 1.216
sys/net/rtsock.c: revision 1.217
whitespace police
Simplify
We can assume that rt_ifp is always non-NULL.
Sending a routing message (RTM_ADD) on adding an llentry
A message used to be sent on adding a cloned route. Restore the
behavior for backward compatibility.
Requested by ryo@
Drop RTF_CONNECTED from a result of RTM_GET for ARP/NDP entries
ARP/NDP entries aren't connected routes.
Reported by ryo@
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.
Test routing messages emitted on operations of ARP/NDP entries
Do netstat -a for an appropriate protocol
Add missing declarations for cleanup
Set net.inet.arp.keep only if it's required
Don't create a permanent L2 cache entry on adding an address to an interface
It was created to copy FreeBSD, however actually the cache isn't
necessary. Remove it to simplify the code and reduce the cost to
maintain it (e.g., keep a consistency with a corresponding local
route).
Fix typo
Fix in_lltable_match_prefix
The function has not been used but will be used soon.
Remove unused function (nd6_rem_ifa_lle)
Allow in6_lltable_free_entry to be called without holding the afdata lock of ifp as well as in_lltable_free_entry
This behavior is a bit odd and should be fixed in the future...
Purge ARP/NDP entries on an interface when the interface is down
Fix PR kern/51179
Purge all related L2 caches on removing a route
The change addresses situations similar to PR 51179.
Purge L2 caches on changing an interface of a route
The change addresses situations similar to PR 51179.
Test implicit removals of ARP/NDP entries
One test case reproudces PR 51179.
Fix build of kernels without both INET and INET6
Tweak lltable_sysctl_dumparp
- Rename lltable_sysctl_dumparp to lltable_sysctl_dump
because it's not only for ARP
- Enable it not only for INET but also for INET6
Fix usage of routing messages on arp -d and ndp -d
It didn't work as we expected; we should set RTA_GATEWAY not
RTA_IFP on RTM_GET to return an if_index and the kernel should
use it on RTM_DELETE.
Improve backward compatibility of (fake) routing messages on adding an ARP/NDP entry
A message originally included only DST and GATEWAY. Restore it.
Fix ifdef; care about a case w/ INET6 and w/o INET
Drop RTF_UP from a routing message of a deleted ARP/NDP entry
Check existence of ARP/NDP entries
Checking ARP/NDP entries is valid rather than checking routes.
Fix wrong comment
Drop RTF_LLINFO flag (now it's RTF_LLDATA) from local routes
They don't have llinfo anymore. And also the change fixes unexpected
behavior of ARP proxy.
Restore ARP/NDP entries to route show and netstat -r
Requested by dyoung@ some time ago
Enable to remove multiple ARP/NDP entries for one destination
The kernel can have multiple ARP/NDP entries which have an indentical
destination on different interfaces. This is normal and can be
reproduce easily by ping -I or ping6 -S. We should be able to remove
such entries.
arp -d <ip> and ndp -d <ip> are changed to fetch all ARP/NDP entries
and remove matched entries. So we can remove multiple entries
described above. This fetch all and selective removal behavior is
the same as arp <ip> and ndp <ip>; they also do fetch all entries
and show only matched entries.
Related to PR 51179
Check if ARP/NDP entries are purged when a related route is deleted
 1.34.2.1 07-Apr-2018  pgoyette Sync with HEAD. 77 conflicts resolved - all of them $NetBSD$
 1.36.2.2 13-Apr-2020  martin Mostly merge changes from HEAD upto 20200411
 1.36.2.1 10-Jun-2019  christos Sync with HEAD
 1.37.2.3 09-Sep-2024  martin Backout pullup of

tests/net/arp/t_arp.sh 1.46

for ticket #1883, this part is not suitable for this branch.
Requested by ozaki-r.
 1.37.2.2 24-Aug-2024  martin Pull up following revision(s) (requested by ozaki-r in ticket #1883):

tests/net/arp/t_dad.sh: revision 1.16
sys/netinet/in.c: revision 1.248
tests/net/arp/t_arp.sh: revision 1.46
sys/netinet/if_arp.c: revision 1.314

arp: fix the behavior on detecting an address duplication without IPv4 DAD

On receiving an ARP request that has the same source protocol address as
the own address, i.e., address duplication, the original behavior of
a kernel prior to supporing IPv4 DAD is to send an ARP reply. It is
the same with a latest kernel with DAD enabled. However, a latest
kernel without DAD sends back an GARP packet. Restore the original
behavior.

inet: send GARP on link up if DAD is disabled

This behavior was accidentally removed at rev 1.233.

tests, arp: add tests of address duplications without DAD

tests, arp: add tests for GARP on link up
 1.37.2.1 05-Sep-2019  martin Pull up following revision(s) (requested by roy in ticket #175):

tests/net/arp/t_arp.sh: revision 1.39
tests/net/ndp/t_ndp.sh: revision 1.36

tests: fix ARP and NDP tests for RTM_* messages

While here add tests for RTM_MISS.
 1.45.8.1 02-Aug-2025  perseant Sync with HEAD
 1.45.6.3 29-Aug-2025  martin Pull up following revision(s) (requested by ozaki-r in ticket #1154):

sys/net/nd.c: revision 1.8
tests/net/arp/t_arp.sh: revision 1.49

nd: fix the number of requests for address resolution

ARP is expected to send requests for address resolution
net.inet.arp.nd_bmaxtries times at most. However, it sends
one more. IPv6 ND also behaves the same way.

The fix requires nd_set_timer reorganization to handle
scheduling timer without sending an NS message.
PR kern/59596

tests: add tests for ARP address resolution
 1.45.6.2 13-Sep-2024  martin Pull up following revision(s) (requested by ozaki-r in ticket #859):

tests/net/arp/t_arp.sh: revision 1.47
tests/net/arp/t_arp.sh: revision 1.48
sys/netinet/if_arp.c: revision 1.315

arp: allow to send packets without an ARP resolution just after
receiving an ARP request

On receiving an ARP request, the current implemention creates an ARP
cache entry but with ND_LLINFO_NOSTATE. Such an entry still needs
an ARP resolution to send back a packet to the requester. The original
behavior before introducing the common ND framework didn't need the
resolution. IPv6 doesn't as well. To restore the original behavior,
make a new ARP cache entry with ND_LLINFO_STALE like IPv6 does.

tests: dedup t_arp.sh like others (NFC)

tests: add tests for ARP cache entry creations
 1.45.6.1 24-Aug-2024  martin Pull up following revision(s) (requested by ozaki-r in ticket #812):

tests/net/arp/t_dad.sh: revision 1.16
sys/netinet/in.c: revision 1.248
tests/net/arp/t_arp.sh: revision 1.46
sys/netinet/if_arp.c: revision 1.314

arp: fix the behavior on detecting an address duplication without IPv4 DAD

On receiving an ARP request that has the same source protocol address as
the own address, i.e., address duplication, the original behavior of
a kernel prior to supporing IPv4 DAD is to send an ARP reply. It is
the same with a latest kernel with DAD enabled. However, a latest
kernel without DAD sends back an GARP packet. Restore the original
behavior.

inet: send GARP on link up if DAD is disabled

This behavior was accidentally removed at rev 1.233.

tests, arp: add tests of address duplications without DAD

tests, arp: add tests for GARP on link up
 1.48.2.1 29-Aug-2025  martin Pull up following revision(s) (requested by ozaki-r in ticket #22):

sys/net/nd.c: revision 1.8
tests/net/arp/t_arp.sh: revision 1.49

nd: fix the number of requests for address resolution

ARP is expected to send requests for address resolution
net.inet.arp.nd_bmaxtries times at most. However, it sends
one more. IPv6 ND also behaves the same way.

The fix requires nd_set_timer reorganization to handle
scheduling timer without sending an NS message.
PR kern/59596

tests: add tests for ARP address resolution
 1.16 20-Aug-2024  ozaki-r tests, arp: add tests of address duplications without DAD
 1.15 11-Mar-2017  ozaki-r branches: 1.15.14; 1.15.22; 1.15.24;
Improve test stability and output messages on failure
 1.14 08-Mar-2017  ozaki-r Improve test stability and output messages on failure
 1.13 25-Nov-2016  ozaki-r branches: 1.13.2;
Share rump_server start/stop and interface creation/destruction functions

The common functions store socks of rump_servers, interfaces of rump_servers
and buses that intefaces connect and allow to destroy them with common
functions without specifying which socks, interfaces and buses we should
destroy.

This change reduces lots of similar setup/cleanup codes.
 1.12 24-Nov-2016  ozaki-r Add missing bus argument for extract_new_packets
 1.11 24-Nov-2016  ozaki-r Move HIJACKING definition to net_common.sh
 1.10 24-Nov-2016  ozaki-r Reduce duplicate codes

Introduce net_common.sh that is to share common functions used in tests
for networking. This commit commonizes extract_new_packets. Other duplicate
codes will be moved to the file in further commits.
 1.9 07-Nov-2016  ozaki-r Accept DEBUG environment variable

By doing so, we can easily turn DEBUG on/off without modifying
the ATF scripts.
 1.8 14-Sep-2016  christos adjust for new ifconfig output.
 1.7 10-Aug-2016  kre + -lrumpdev
 1.6 25-Aug-2015  ozaki-r branches: 1.6.2;
Give a chance to send a DAD announce packet

ifconfig -w ensures IP addresses have left tentative state, however,
it doesn't guarantee that a DAD announce packet is sent. The kernel
clears tentative flag and then sends the packet so that ifconfig -w
can return before the kernel sends the packet.
 1.5 24-Aug-2015  ozaki-r Disable another tentative state check

It's too ephemeral to check robustly.
 1.4 17-Aug-2015  ozaki-r Improve test stability

- Take a diff between packet dumps and use it for packet checking
- it's resistant against packet reorder
- Seep 2 sec to make sure a NS message is sent
- Disable tentative state check for now
- it's too ephemeral to check robustly
 1.3 31-Jul-2015  ozaki-r Remove remaining debug code
 1.2 31-Jul-2015  ozaki-r Fix cleanup; halt all running rump_servers
 1.1 30-Jul-2015  ozaki-r Add tests for IPv4 DAD
 1.6.2.3 20-Mar-2017  pgoyette Sync with HEAD
 1.6.2.2 07-Jan-2017  pgoyette Sync with HEAD. (Note that most of these changes are simply $NetBSD$
tag issues.)
 1.6.2.1 04-Nov-2016  pgoyette Sync with HEAD
 1.13.2.1 21-Apr-2017  bouyer Sync with HEAD
 1.15.24.1 02-Aug-2025  perseant Sync with HEAD
 1.15.22.1 24-Aug-2024  martin Pull up following revision(s) (requested by ozaki-r in ticket #812):

tests/net/arp/t_dad.sh: revision 1.16
sys/netinet/in.c: revision 1.248
tests/net/arp/t_arp.sh: revision 1.46
sys/netinet/if_arp.c: revision 1.314

arp: fix the behavior on detecting an address duplication without IPv4 DAD

On receiving an ARP request that has the same source protocol address as
the own address, i.e., address duplication, the original behavior of
a kernel prior to supporing IPv4 DAD is to send an ARP reply. It is
the same with a latest kernel with DAD enabled. However, a latest
kernel without DAD sends back an GARP packet. Restore the original
behavior.

inet: send GARP on link up if DAD is disabled

This behavior was accidentally removed at rev 1.233.

tests, arp: add tests of address duplications without DAD

tests, arp: add tests for GARP on link up
 1.15.14.1 24-Aug-2024  martin Pull up following revision(s) (requested by ozaki-r in ticket #1883):

tests/net/arp/t_dad.sh: revision 1.16
sys/netinet/in.c: revision 1.248
tests/net/arp/t_arp.sh: revision 1.46
sys/netinet/if_arp.c: revision 1.314

arp: fix the behavior on detecting an address duplication without IPv4 DAD

On receiving an ARP request that has the same source protocol address as
the own address, i.e., address duplication, the original behavior of
a kernel prior to supporing IPv4 DAD is to send an ARP reply. It is
the same with a latest kernel with DAD enabled. However, a latest
kernel without DAD sends back an GARP packet. Restore the original
behavior.

inet: send GARP on link up if DAD is disabled

This behavior was accidentally removed at rev 1.233.

tests, arp: add tests of address duplications without DAD

tests, arp: add tests for GARP on link up

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