linux-toradex.git/include/net/ndisc.h, branch v4.9.16

6lowpan: introduce 6lowpan-nd

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

This patch introduce different 6lowpan handling for receive and transmit
NS/NA messages for the ipv6 neighbour discovery. The first use-case is
for supporting 802.15.4 short addresses inside the option fields and
handling for RFC6775 6CO option field as userspace option.

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

2016-06-16T03:41:22+00:00

This patch adds __ndisc_opt_addr_data as low-level function for
ndisc_opt_addr_data 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

ndisc: add __ndisc_opt_addr_space function

2016-06-16T03:41:22+00:00

This patch adds __ndisc_opt_addr_space as low-level function for
ndisc_opt_addr_space 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

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

ipv6: remove unused neigh parameter from ndisc functions

2015-09-24T19:26:08+00:00

Since commit 12fd84f4383b1 ("ipv6: Remove unused neigh argument for
icmp6_dst_alloc() and its callers."), the neigh parameter of ndisc_send_na
and ndisc_send_ns is unused.

CC: YOSHIFUJI Hideaki 
Signed-off-by: Jiri Benc 
Signed-off-by: David S. Miller

ipv6: ndisc: inherit metadata dst when creating ndisc requests

2015-08-20T22:42:37+00:00

If output device wants to see the dst, inherit the dst of the original skb
in the ndisc request.

This is an IPv6 counterpart of commit 0accfc268f4d ("arp: Inherit metadata
dst when creating ARP requests").

Signed-off-by: Jiri Benc 
Acked-by: Thomas Graf 
Signed-off-by: David S. Miller

neigh: Factor out ___neigh_lookup_noref

2015-03-04T05:23:23+00:00

While looking at the mpls code I found myself writing yet another
version of neigh_lookup_noref.  We currently have __ipv4_lookup_noref
and __ipv6_lookup_noref.

So to make my work a little easier and to make it a smidge easier to
verify/maintain the mpls code in the future I stopped and wrote
___neigh_lookup_noref.  Then I rewote __ipv4_lookup_noref and
__ipv6_lookup_noref in terms of this new function.  I tested my new
version by verifying that the same code is generated in
ip_finish_output2 and ip6_finish_output2 where these functions are
inlined.

To get to ___neigh_lookup_noref I added a new neighbour cache table
function key_eq.  So that the static size of the key would be
available.

I also added __neigh_lookup_noref for people who want to to lookup
a neighbour table entry quickly but don't know which neibhgour table
they are going to look up.

Signed-off-by: "Eric W. Biederman" 
Signed-off-by: David S. Miller

ndisc.h: Remove extern from function prototypes

2013-09-21T18:01:39+00:00

There are a mix of function prototypes with and without extern
in the kernel sources.  Standardize on not using extern for
function prototypes.

Function prototypes don't need to be written with extern.
extern is assumed by the compiler.  Its use is as unnecessary as
using auto to declare automatic/local variables in a block.

Signed-off-by: Joe Perches 
Signed-off-by: David S. Miller