Hi, this patch series introduces the ndisc ops callback structure to add different handling for IPv6 neighbour discovery cache functionality. It implements at first the two following use-cases: - 6CO handling as userspace option (For all 6LoWPAN layers, BTLE/802.15.4) [0] - short address handling for 802.15.4 6LoWPAN only [1] Since my last patch series, I completely changed the whole ndisc_ops callback structure to not replace the whole ndisc functionality at recv/send level of NS/NA/RS/RA which I send in my previous patch-series "6lowpan: introduce basic 6lowpan-nd". I changed it now to add different handling in a very low-level way of ndisc functionality. The ndisc_ops don't must be registered to dev->ndisc_ops anymore, if they are not set, then no additional ipv6 ndisc handling will be done. This patch series now introduce a complete handling of short address for 802.15.4 6LoWPAN in case of send/recv of NA/NS/RS and RA. In case of RA (receive only) and PIO we also need a second prefix + short-address based address. This callback structure can be used later (I hope) for RFC 6775 [0]. This RFC defines some new option fields and messages for 6LoWPAN-ND. This patch series does not implement RFC 6775 (except we decide now to handle 6CO in userspace). Additional we can use the current ops for parse/fill ndisc options for kernel handled ndisc messages to add 6CIO, see [2]. I tested RA/NS/NA/RS messages with short address which seems to work, what I didn't test is the redirect messages since I don't know how to generate them. The short address for redirect messages are also some special case here, because the short address by a L3 target address need to be added. btw: According to [3] sending redirect messages should be also disabled by default on 6lowpan interfaces, but can be activated afterwards. This is maybe something for the ipv6_devconf structure. There is a "accept_redirects" but no "disable_redirects". - Alex [0] https://tools.ietf.org/html/rfc6775 [1] https://tools.ietf.org/html/rfc4944#section-8 [2] https://tools.ietf.org/html/rfc7400#section-3.3 [3] https://tools.ietf.org/html/rfc6775#section-6.1 Cc: David S. Miller <davem@xxxxxxxxxxxxx> Cc: Alexey Kuznetsov <kuznet@xxxxxxxxxxxxx> Cc: James Morris <jmorris@xxxxxxxxx> Cc: Hideaki YOSHIFUJI <yoshfuji@xxxxxxxxxxxxxx> Cc: Patrick McHardy <kaber@xxxxxxxxx> changes since "PATCHv2 6lowpan: introduce basic 6lowpan-nd": - change EXPORT_SYMBOL to EXPORT_SYMBOL_GPL - rework ndisc_ops to be very low-level (not replacing full ndisc handling) and add full short address handling now. - added comments for ndisc_ops. - make ndisc_opt_addr_space, ndisc_opt_addr_data and ndisc_fill_addr_option completely independent from net_device dev argument. Instead add ndisc_dev helpers for do it for the normal case. - remove lowpan_neigh and add a 802.15.4 6lowpan private data for now only. - remove empty ndisc_ops inline functions - add tmp debugfs UAPI to get 6lowpan short address, necessary for e.g. radvd to put short address as sllao in RA. Alexander Aring (12): 6lowpan: add private neighbour data 6lowpan: add 802.15.4 short addr slaac 6lowpan: remove ipv6 module request ndisc: get rid off dev parameter in ndisc_opt_addr_space ndisc: get rid off dev parameter in ndisc_opt_addr_data ndisc: get rid off dev parameter in ndisc_fill_addr_option addrconf: put prefix address add in an own function ipv6: introduce neighbour discovery ops ipv6: export several functions 6lowpan: introduce 6lowpan-nd 6lowpan: add support for getting short address 6lowpan: add support for 802.15.4 short addr handling include/linux/netdevice.h | 8 +- include/net/6lowpan.h | 10 ++ include/net/addrconf.h | 10 ++ include/net/ndisc.h | 229 +++++++++++++++++++++++++++++++++++++++--- net/6lowpan/6lowpan_i.h | 4 + net/6lowpan/Makefile | 2 +- net/6lowpan/core.c | 50 ++++++++- net/6lowpan/debugfs.c | 35 +++++++ net/6lowpan/iphc.c | 167 ++++++++++++++++++++++++------ net/6lowpan/ndisc.c | 223 ++++++++++++++++++++++++++++++++++++++++ net/ieee802154/6lowpan/core.c | 12 +++ net/ieee802154/6lowpan/tx.c | 113 ++++++++++----------- net/ipv6/addrconf.c | 204 ++++++++++++++++++++----------------- net/ipv6/ndisc.c | 178 +++++++++++++++++++------------- net/ipv6/route.c | 18 ++-- 15 files changed, 990 insertions(+), 273 deletions(-) create mode 100644 net/6lowpan/ndisc.c -- 2.8.2 -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
