Commit Graph

23 Commits

Author SHA1 Message Date
Phoebe Buckheister
f0f77dc6be ieee802154, mac802154: implement devkey record option
The 802.15.4-2011 standard states that for each key, a list of devices
that use this key shall be kept. Previous patches have only considered
two options:

 * a device "uses" (or may use) all keys, rendering the list useless
 * a device is restricted to a certain set of keys

Another option would be that a device *may* use all keys, but need not
do so, and we are interested in the actual set of keys the device uses.
Recording keys used by any given device may have a noticable performance
impact and might not be needed as often. The common case, in which a
device will not switch keys too often, should still perform well.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-16 17:23:42 -04:00
Phoebe Buckheister
29e023746a mac802154: add llsec configuration functions
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-16 17:23:41 -04:00
Phoebe Buckheister
f30be4d53c mac802154: integrate llsec with wpan devices
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-16 17:23:41 -04:00
Phoebe Buckheister
dc20759f28 ieee802154: add types for link-layer security
The added structures match 802.15.4-2011 link-layer security PIBs as
closely as is reasonable. Some lists required by the standard were
modeled as bitmaps (frame_types and command_frame_ids in *llsec_key,
802.15.4-2011 7.5/Table 61), since using lists for those seems a bit
excessive and not particularly useful. The DeviceDescriptorHandleList
was inverted and is here a per-device list, since operations on this
list are likely to have both a key and a device at hand, and per-device
lists of keys are shorter than per-key lists of devices.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-16 17:23:40 -04:00
Phoebe Buckheister
32edc40ae6 ieee802154: change _cb handling slightly
The current mac_cb handling of ieee802154 is rather awkward and limited.
Decompose the single flags field into multiple fields with the meanings
of each subfield of the flags field to make future extensions (for
example, link-layer security) easier. Also don't set the frame sequence
number in upper layers, since that's a thing the MAC is supposed to set
on frame transmit - we set it on header creation, but assuming that
upper layers do not blindly duplicate our headers, this is fine.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-15 15:51:42 -04:00
Phoebe Buckheister
c3a6114f31 ieee802154: add definitions for link-layer security and header functions
When dealing with 802.15.4, one often has to know the maximum payload
size for a given packet. This depends on many factors, one of which is
whether or not a security header is present in the frame. These
definitions and functions provide an easy way for any upper layer to
calculate the maximum payload size for a packet. The first obvious user
for this is 6lowpan, which duplicates this calculation and gets it
partially wrong because it ignores security headers.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-15 15:51:42 -04:00
Phoebe Buckheister
e462ded699 mac802154: make csma/cca parameters per-wpan
Commit 9b2777d608 (ieee802154: add TX power control to wpan_phy)
and following erroneously added CSMA and CCA parameters for 802.15.4
devices as PHY parameters, while they are actually MAC parameters and
can differ for any two WPAN instances. Since it is now sensible to have
multiple WPAN devices with differing CSMA/CCA parameters, make these
parameters MAC parameters instead.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-01 16:25:51 -04:00
Phoebe Buckheister
a13061ec04 6lowpan: move lowpan frag_info out of 802.15.4 headers
Fragmentation and reassembly information for 6lowpan is independent from
the 802.15.4 stack and used only by the 6lowpan reassembly process. Move
the ieee802154_frag_info struct to a private are, it needn't be in the
802.15.4 skb control block.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-14 22:15:26 -04:00
Phoebe Buckheister
ae531b9475 ieee802154: use ieee802154_addr instead of *_sa variants
Change all internal uses of ieee802154_addr_sa to ieee802154_addr,
except for those instances that communicate directly with userspace.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-14 22:15:26 -04:00
Phoebe Buckheister
e6278d9200 mac802154: use header operations to create/parse headers
Use the operations on 802.15.4 header structs introduced in a previous
patch to create and parse all headers in the mac802154 stack. This patch
reduces code duplication between different parts of the mac802154 stack
that needed information from headers, and also fixes a few bugs that
seem to have gone unnoticed until now:

 * 802.15.4 dgram sockets would return a slightly incorrect value for
   the SIOCINQ ioctl
 * mac802154 would not drop frames with the "security enabled" bit set,
   even though it does not support security, in violation of the
   standard

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-14 22:15:26 -04:00
Phoebe Buckheister
94b4f6c21c ieee802154: add header structs with endiannes and operations
This patch provides a set of structures to represent 802.15.4 MAC
headers, and a set of operations to push/pull/peek these structs from
skbs. We cannot simply pointer-cast the skb MAC header pointer to these
structs, because 802.15.4 headers are wildly variable - depending on the
first three bytes, virtually all other fields of the header may be
present or not, and be present with different lengths.

The new header creation/parsing routines also support 802.15.4 security
headers, which are currently not supported by the mac802154
implementation of the protocol.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-14 22:15:26 -04:00
Phoebe Buckheister
b70ab2e87f ieee802154: enforce consistent endianness in the 802.15.4 stack
Enable sparse warnings about endianness, replace the remaining fields
regarding network operations without explicit endianness annotations
with such that are annotated, and propagate this through the entire
stack.

Uses of ieee802154_addr_sa are not changed yet, this patch is only
concerned with all other fields (such as address filters, operation
parameters and the likes).

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-14 22:15:26 -04:00
Phoebe Buckheister
46ef0eb3ea ieee802154: add address struct with proper endiannes and some operations
Add a replacement ieee802154_addr struct with proper endianness on
fields. Short address fields are stored as __le16 as on the network,
extended (EUI64) addresses are __le64 as opposed to the u8[8] format
used previously. This disconnect with the netdev address, which is
stored as big-endian u8[8], is intentional.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-14 22:15:26 -04:00
Phoebe Buckheister
376b7bd355 ieee802154: rename struct ieee802154_addr to *_sa
The struct as currently defined uses host byte order for some fields,
and most big endian/EUI display byte order for other fields. Inside the
stack, endianness should ideally match network byte order where possible
to minimize the number of byteswaps done in critical paths, but this
patch does not address this; it is only preparatory.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-14 22:15:25 -04:00
Alexander Aring
89745c9c41 6lowpan: add frag information struct
This patch adds a 6lowpan fragmentation struct into cb of skb which
is necessary to hold fragmentation information.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-28 17:05:21 -05:00
Werner Almesberger
56aa091d60 ieee802154/nl-mac.c: make some MLME operations optional
Check for NULL before calling the following operations from "struct
ieee802154_mlme_ops": assoc_req, assoc_resp, disassoc_req, start_req,
and scan_req.

This fixes a current oops where those functions are called but not
implemented. It also updates the documentation to clarify that they
are now optional by design. If a call to an unimplemented function
is attempted, the kernel returns EOPNOTSUPP via netlink.

The following operations are still required: get_phy, get_pan_id,
get_short_addr, and get_dsn.

Note that the places where this patch changes the initialization
of "ret" should not affect the rest of the code since "ret" was
always set (again) before returning its value.

Signed-off-by: Werner Almesberger <werner@almesberger.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-08 12:00:16 -04:00
Werner Almesberger
d87c8c6d15 IEEE 802.15.4: remove get_bsn from "struct ieee802154_mlme_ops"
It served no purpose: we never call it from anywhere in the stack
and the only driver that did implement it (fakehard) merely provided
a dummy value.

There is also considerable doubt whether it would make sense to
even attempt beacon processing at this level in the Linux kernel.

Signed-off-by: Werner Almesberger <werner@almesberger.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-08 12:00:16 -04:00
alex.bluesman.smirnov@gmail.com
74a02fcf77 mac802154: declare reduced mlme operations
According IEEE 802.15.4 standard each node can be either full functionality
device (FFD) or reduce functionality device (RFD). So 2 sets of operations
are needed. This patch declare RFD operations structure.

Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-16 15:16:56 -04:00
alex.bluesman.smirnov@gmail.com
1cd829c83e mac802154: RX data path
Main RX data path implementation between physical and mac layers.

Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-16 15:16:44 -04:00
Dmitry Eremin-Solenikov
42723448b8 ieee802154: add an mlme_ops call to retrieve PHY object
ops->get_phy should increment reference to wpan-phy. As we return
the external structure, we should do refcounting correctly.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
2009-11-06 14:32:18 +03:00
Dmitry Eremin-Solenikov
a9966b580a ieee802154: constify struct net_device in some operations
Some of ieee802154 operations really shouldn't change passed net_device.
Constify passed argument.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
2009-11-06 14:31:16 +03:00
Dmitry Eremin-Solenikov
16eea493da ieee802154: add support for channel pages from IEEE 802.15.4-2006
IEEE 802.15.4-2006 adds new concept: channel pages, which can contain several
channels. Add support for channel pages in the API and in the fakehard driver.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
2009-08-19 23:08:22 +04:00
Dmitry Eremin-Solenikov
f0166e5e3c ieee802154: move headers out of extra directory
include/net/ieee802154/af_ieee802154.h (and others) naming seems to be too long
and redundant. Drop one level of subdirectories.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
2009-07-23 17:08:51 +04:00