linux-toradex.git/tools/testing/selftests/net/Makefile, branch v6.17

selftests: net: add test for destination in broadcast packets

2025-09-09T09:29:58+00:00

Add test to check the broadcast ethernet destination field is set
correctly.

This test sends a broadcast ping, captures it using tcpdump and
ensures that all bits of the 6 octet ethernet destination address
are correctly set by examining the output capture file.

Co-developed-by: Brett A C Sheffield 
Signed-off-by: Brett A C Sheffield 
Signed-off-by: Oscar Maes 
Link: https://patch.msgid.link/20250902150240.4272-1-oscmaes92@gmail.com
Signed-off-by: Paolo Abeni

selftests: net: Add a selftest for VXLAN with FDB nexthop groups

2025-09-02T23:57:00+00:00

Add test cases for VXLAN with FDB nexthop groups, testing both IPv4 and
IPv6. Test basic Tx functionality as well as some corner cases.

Example output:

 # ./test_vxlan_nh.sh
 TEST: VXLAN FDB nexthop: IPv4 basic Tx                              [ OK ]
 TEST: VXLAN FDB nexthop: IPv6 basic Tx                              [ OK ]
 TEST: VXLAN FDB nexthop: learning                                   [ OK ]
 TEST: VXLAN FDB nexthop: IPv4 proxy                                 [ OK ]
 TEST: VXLAN FDB nexthop: IPv6 proxy                                 [ OK ]

Signed-off-by: Ido Schimmel 
Reviewed-by: Nikolay Aleksandrov 
Link: https://patch.msgid.link/20250901065035.159644-4-idosch@nvidia.com
Signed-off-by: Jakub Kicinski

ipv6: add `force_forwarding` sysctl to enable per-interface forwarding

2025-07-25T20:06:19+00:00

It is currently impossible to enable ipv6 forwarding on a per-interface
basis like in ipv4. To enable forwarding on an ipv6 interface we need to
enable it on all interfaces and disable it on the other interfaces using
a netfilter rule. This is especially cumbersome if you have lots of
interfaces and only want to enable forwarding on a few. According to the
sysctl docs [0] the `net.ipv6.conf.all.forwarding` enables forwarding
for all interfaces, while the interface-specific
`net.ipv6.conf..forwarding` configures the interface
Host/Router configuration.

Introduce a new sysctl flag `force_forwarding`, which can be set on every
interface. The ip6_forwarding function will then check if the global
forwarding flag OR the force_forwarding flag is active and forward the
packet.

To preserve backwards-compatibility reset the flag (on all interfaces)
to 0 if the net.ipv6.conf.all.forwarding flag is set to 0.

Add a short selftest that checks if a packet gets forwarded with and
without `force_forwarding`.

[0]: https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt

Acked-by: Nicolas Dichtel 
Signed-off-by: Gabriel Goller 
Link: https://patch.msgid.link/20250722081847.132632-1-g.goller@proxmox.com
Signed-off-by: Jakub Kicinski

selftests: net: add test for variable PMTU in broadcast routes

2025-07-15T00:29:41+00:00

Added a test for variable PMTU in broadcast routes.

This test uses iputils' ping and attempts to send a ping between
two peers, which should result in a regular echo reply.

This test will fail when the receiving peer does not receive the echo
request due to a lack of packet fragmentation.

Signed-off-by: Oscar Maes 
Link: https://patch.msgid.link/20250710142714.12986-2-oscmaes92@gmail.com
Signed-off-by: Jakub Kicinski

selftests: net: add netdev-l2addr.sh for testing L2 address functionality

2025-07-12T00:00:18+00:00

Add a new test script to the network selftests which tests getting and
setting of layer 2 addresses through netlink, including the newly added
support for setting a permaddr on netdevsim devices.

Reviewed-by: Simon Horman 
Signed-off-by: Toke Høiland-Jørgensen 
Link: https://patch.msgid.link/20250710-netdevsim-perm_addr-v4-2-c9db2fecf3bf@redhat.com
Signed-off-by: Jakub Kicinski

selftests: net: Add a selftest for externally validated neighbor entries

2025-07-01T01:14:24+00:00

Add test cases for externally validated neighbor entries, testing both
IPv4 and IPv6. Name the file "test_neigh.sh" so that it could be
possibly extended in the future with more neighbor test cases.

Example output:

 # ./test_neigh.sh
 TEST: IPv4 "extern_valid" flag: Add entry                           [ OK ]
 TEST: IPv4 "extern_valid" flag: Add with an invalid state           [ OK ]
 TEST: IPv4 "extern_valid" flag: Add with "use" flag                 [ OK ]
 TEST: IPv4 "extern_valid" flag: Replace entry                       [ OK ]
 TEST: IPv4 "extern_valid" flag: Replace entry with "managed" flag   [ OK ]
 TEST: IPv4 "extern_valid" flag: Replace with an invalid state       [ OK ]
 TEST: IPv4 "extern_valid" flag: Interface down                      [ OK ]
 TEST: IPv4 "extern_valid" flag: Carrier down                        [ OK ]
 TEST: IPv4 "extern_valid" flag: Transition to "reachable" state     [ OK ]
 TEST: IPv4 "extern_valid" flag: Transition back to "stale" state    [ OK ]
 TEST: IPv4 "extern_valid" flag: Forced garbage collection           [ OK ]
 TEST: IPv4 "extern_valid" flag: Periodic garbage collection         [ OK ]
 TEST: IPv6 "extern_valid" flag: Add entry                           [ OK ]
 TEST: IPv6 "extern_valid" flag: Add with an invalid state           [ OK ]
 TEST: IPv6 "extern_valid" flag: Add with "use" flag                 [ OK ]
 TEST: IPv6 "extern_valid" flag: Replace entry                       [ OK ]
 TEST: IPv6 "extern_valid" flag: Replace entry with "managed" flag   [ OK ]
 TEST: IPv6 "extern_valid" flag: Replace with an invalid state       [ OK ]
 TEST: IPv6 "extern_valid" flag: Interface down                      [ OK ]
 TEST: IPv6 "extern_valid" flag: Carrier down                        [ OK ]
 TEST: IPv6 "extern_valid" flag: Transition to "reachable" state     [ OK ]
 TEST: IPv6 "extern_valid" flag: Transition back to "stale" state    [ OK ]
 TEST: IPv6 "extern_valid" flag: Forced garbage collection           [ OK ]
 TEST: IPv6 "extern_valid" flag: Periodic garbage collection         [ OK ]

Signed-off-by: Ido Schimmel 
Link: https://patch.msgid.link/20250626073111.244534-3-idosch@nvidia.com
Signed-off-by: Jakub Kicinski

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2025-06-19T20:00:24+00:00

Cross-merge networking fixes after downstream PR (net-6.16-rc3).

No conflicts or adjacent changes.

Signed-off-by: Jakub Kicinski

selftests: net: add test for passive TFO socket NAPI ID

2025-06-19T01:30:51+00:00

Add a test that checks that the NAPI ID of a passive TFO socket is valid
i.e. not zero.

Signed-off-by: David Wei 
Link: https://patch.msgid.link/20250617212102.175711-4-dw@davidwei.uk
Signed-off-by: Jakub Kicinski

selftests: net: add passive TFO test binary

2025-06-19T01:30:51+00:00

Add a simple passive TFO server and client test binary. This will be
used to test the SO_INCOMING_NAPI_ID of passive TFO accepted sockets.

Signed-off-by: David Wei 
Link: https://patch.msgid.link/20250617212102.175711-3-dw@davidwei.uk
Signed-off-by: Jakub Kicinski

selftest: Add selftest for multicast address notifications

2025-06-18T00:58:51+00:00

This commit adds a new kernel selftest to verify RTNLGRP_IPV4_MCADDR
and RTNLGRP_IPV6_MCADDR notifications. The test works by adding and
removing a dummy interface and then confirming that the system
correctly receives join and removal notifications for the 224.0.0.1
and ff02::1 multicast addresses.

The test relies on the iproute2 version to be 6.13+.

Tested by the following command:
$ vng -v --user root --cpus 16 -- \
make -C tools/testing/selftests TARGETS=net
TEST_PROGS=rtnetlink_notification.sh \
TEST_GEN_PROGS="" run_tests

Cc: Maciej Żenczykowski 
Cc: Lorenzo Colitti 
Signed-off-by: Yuyang Huang 
Link: https://patch.msgid.link/20250614053522.623820-1-yuyanghuang@google.com
Signed-off-by: Jakub Kicinski