linux-toradex.git/net/ipv6/ndisc.c, branch v4.10

ipv6 addrconf: Implemented enhanced DAD (RFC7527)

2016-12-04T04:21:37+00:00

Implemented RFC7527 Enhanced DAD.
IPv6 duplicate address detection can fail if there is some temporary
loopback of Ethernet frames. RFC7527 solves this by including a random
nonce in the NS messages used for DAD, and if an NS is received with the
same nonce it is assumed to be a looped back DAD probe and is ignored.
RFC7527 is enabled by default. Can be disabled by setting both of
conf/{all,interface}/enhanced_dad to zero.

Signed-off-by: Erik Nordmark 
Signed-off-by: Bob Gilligan 
Reviewed-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

net: l3mdev: remove redundant calls

2016-09-11T06:12:52+00:00

A previous patch added l3mdev flow update making these hooks
redundant. Remove them.

Signed-off-by: David Ahern 
Signed-off-by: David S. Miller

ipv6: export several functions

2016-06-16T03:41:23+00:00

This patch exports some neighbour discovery functions which can be used
by 6lowpan neighbour discovery ops functionality then.

Cc: David S. Miller 
Cc: Alexey Kuznetsov 
Cc: James Morris 
Cc: Hideaki YOSHIFUJI 
Cc: Patrick McHardy 
Acked-by: YOSHIFUJI Hideaki 
Reviewed-by: Stefan Schmidt 
Signed-off-by: Alexander Aring 
Signed-off-by: David S. Miller

ipv6: introduce neighbour discovery ops

2016-06-16T03:41:23+00:00

This patch introduces neighbour discovery ops callback structure. The
idea is to separate the handling for 6LoWPAN into the 6lowpan module.

These callback offers 6lowpan different handling, such as 802.15.4 short
address handling or RFC6775 (Neighbor Discovery Optimization for IPv6
over 6LoWPANs).

Cc: David S. Miller 
Cc: Alexey Kuznetsov 
Cc: James Morris 
Cc: Hideaki YOSHIFUJI 
Cc: Patrick McHardy 
Acked-by: YOSHIFUJI Hideaki 
Signed-off-by: Alexander Aring 
Signed-off-by: David S. Miller

ndisc: add __ndisc_fill_addr_option function

2016-06-16T03:41:23+00:00

This patch adds __ndisc_fill_addr_option as low-level function for
ndisc_fill_addr_option which doesn't depend on net_device parameter.

Cc: David S. Miller 
Cc: Alexey Kuznetsov 
Cc: James Morris 
Cc: Hideaki YOSHIFUJI 
Cc: Patrick McHardy 
Acked-by: YOSHIFUJI Hideaki 
Reviewed-by: Stefan Schmidt 
Signed-off-by: Alexander Aring 
Signed-off-by: David S. Miller

ipv6: add option to drop unsolicited neighbor advertisements

2016-02-11T09:27:36+00:00

In certain 802.11 wireless deployments, there will be NA proxies
that use knowledge of the network to correctly answer requests.
To prevent unsolicitd advertisements on the shared medium from
being a problem, on such deployments wireless needs to drop them.

Enable this by providing an option called "drop_unsolicited_na".

Signed-off-by: Johannes Berg 
Signed-off-by: David S. Miller

ipv6: honor ifindex in case we receive ll addresses in router advertisements

2015-12-24T03:03:54+00:00

Marc Haber reported we don't honor interface indexes when we receive link
local router addresses in router advertisements. Luckily the non-strict
version of ipv6_chk_addr already does the correct job here, so we can
simply use it to lighten the checks and use those addresses by default
without any configuration change.

Link: 
Reported-by: Marc Haber 
Cc: Marc Haber 
Signed-off-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

Revert "ipv6: ndisc: inherit metadata dst when creating ndisc requests"

2015-12-01T20:07:59+00:00

This reverts commit ab450605b35caa768ca33e86db9403229bf42be4.

In IPv6, we cannot inherit the dst of the original dst. ndisc packets
are IPv6 packets and may take another route than the original packet.

This patch breaks the following scenario: a packet comes from eth0 and
is forwarded through vxlan1. The encapsulated packet triggers an NS
which cannot be sent because of the wrong route.

CC: Jiri Benc 
CC: Thomas Graf 
Signed-off-by: Nicolas Dichtel 
Signed-off-by: David S. Miller

net: Add VRF support to IPv6 stack

2015-10-13T11:55:08+00:00

As with IPv4 support for VRFs added to IPv6 stack by replacing hardcoded
table ids with possibly device specific ones and manipulating the oif in
the flowi6. The flow flags are used to skip oif compare in nexthop lookups
if the device is enslaved to a VRF via the L3 master device.

Signed-off-by: David Ahern 
Signed-off-by: David S. Miller

net: Export fib6_get_table and nd_tbl

2015-10-13T11:55:05+00:00

Signed-off-by: David Ahern 
Signed-off-by: David S. Miller