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2017-04-126lowpan: Don't set IFF_NO_QUEUELuiz Augusto von Dentz1-1/+0
There is no point in setting IFF_NO_QUEUE should already have taken care of setting it if tx_queue_len is not set, in fact this may actually disable queue for interfaces that require it and do set tx_queue_len. Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-126lowpan: Use netdev addr_len to determine lladdr lenLuiz Augusto von Dentz1-11/+38
This allow technologies such as Bluetooth to use its native lladdr which is eui48 instead of eui64 which was expected by functions like lowpan_header_decompress and lowpan_header_compress. Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-126lowpan: iphc: override l2 packet informationAlexander Aring1-0/+8
The skb->pkt_type need to be set by L2, but on 6LoWPAN there exists L2 e.g. BTLE which doesn't has multicast addressing. If it's a multicast or not is detected by IPHC headers multicast bit. The IPv6 layer will evaluate this pkt_type, so we force set this type while uncompressing. Should be okay for 802.15.4 as well. Signed-off-by: Alexander Aring <aar@pengutronix.de> Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-126lowpan: Set MAC address length according to LOWPAN_LLTYPEPatrik Flykt1-1/+10
Set MAC address length according to the 6LoWPAN link layer in use. Bluetooth Low Energy uses 48 bit addressing while IEEE802.15.4 uses 64 bits. Signed-off-by: Patrik Flykt <patrik.flykt@linux.intel.com> Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-01-226lowpan: use rb_entry()Geliang Tang1-4/+4
To make the code clearer, use rb_entry() instead of container_of() to deal with rbtree. Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-09-196lowpan: ndisc: no overreact if no short address is availableAlexander Aring1-2/+0
This patch removes handling to remove short address for a neigbour entry if RS/RA/NS/NA doesn't contain a short address. If these messages doesn't has any short address option, the existing short address from ndisc cache will be used. The current behaviour will set that the neigbour doesn't has a short address anymore. Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-07-086lowpan: ndisc: set invalid unicast short addr to unspecAlexander Aring1-2/+5
When receiving neighbour information with short address option field we should check the complete range of invalid short addresses and set it to one invalid address setting which is the unspecified address. This address is also used when by creating at first a new neighbour entry to indicate no short address is set. Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-07-086lowpan: ndisc: add missing 802.15.4 only checkAlexander Aring1-0/+3
This patch adds a missing check to handle short address parsing for 802.15.4 6LoWPAN only. Signed-off-by: Alexander Aring <aar@pengutronix.de> Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-07-086lowpan: ndisc: fix double read unlockAlexander Aring1-1/+2
This patch removes a double unlock case to accessing neighbour private data. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Alexander Aring <aar@pengutronix.de> Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-06-156lowpan: add support for 802.15.4 short addr handlingAlexander Aring1-29/+138
This patch adds necessary handling for use the short address for 802.15.4 6lowpan. It contains support for IPHC address compression and new matching algorithmn to decide which link layer address will be used for 802.15.4 frame. Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-156lowpan: add support for getting short addressAlexander Aring1-0/+39
In case of sending RA messages we need some way to get the short address from an 802.15.4 6LoWPAN interface. This patch will add a temporary debugfs entry for experimental userspace api. Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-156lowpan: introduce 6lowpan-ndAlexander Aring4-2/+242
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 <davem@davemloft.net> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: James Morris <jmorris@namei.org> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: Patrick McHardy <kaber@trash.net> Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-156lowpan: remove ipv6 module requestAlexander Aring1-2/+0
Since we use exported function from ipv6 kernel module we don't need to request the module anymore to have ipv6 functionality. Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-156lowpan: add 802.15.4 short addr slaacAlexander Aring1-0/+46
This patch adds the autoconfiguration if a valid 802.15.4 short address is available for 802.15.4 6LoWPAN interfaces. Cc: David S. Miller <davem@davemloft.net> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: James Morris <jmorris@namei.org> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: Patrick McHardy <kaber@trash.net> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-136lowpan: move mac802154 headerAlexander Aring1-3/+0
In case of link-layer specific handling for 802.15.4 we need to cast to 802.15.4 sepcific structures. Simple add this header when include the 6lowpan header. Signed-off-by: Alexander Aring <aar@pengutronix.de> Reviewed-by: Stefan Schmidt<stefan@osg.samsung.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-04-136lowpan: add lowpan_is_ll functionAlexander Aring1-0/+9
This patch adds the lowpan_is_ll function, which can be used to make a special 6lowpan linklayer handling for a specific 6lowpan linklayer type. Signed-off-by: Alexander Aring <aar@pengutronix.de> Reviewed-by: Stefan Schmidt<stefan@osg.samsung.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-04-136lowpan: move eui64 uncompress functionAlexander Aring1-16/+0
This function will be use in later functionality in other branches than generic 6lowpan, so we move it to the global 6lowpan header. Signed-off-by: Alexander Aring <aar@pengutronix.de> Reviewed-by: Stefan Schmidt<stefan@osg.samsung.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-04-136lowpan: iphc: remove unnecessary zero dataAlexander Aring1-1/+1
This patch removes unnecessary zero data for a stack variable. Signed-off-by: Alexander Aring <aar@pengutronix.de> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-04-136lowpan: iphc: rename add lowpan prefixAlexander Aring1-25/+31
This patch adds a lowpan prefix to each functions which doesn't have such prefix currently. Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <aar@pengutronix.de> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-04-136lowpan: change naming for lowpan private dataAlexander Aring4-35/+35
This patch changes the naming for interface private data for lowpan intefaces. The current private data scheme is: ------------------------------------------------- | 6LoWPAN Generic | LinkLayer 6LoWPAN | ------------------------------------------------- the current naming schemes are: - 6LoWPAN Generic: - lowpan_priv - LinkLayer 6LoWPAN: - BTLE - lowpan_dev - 802.15.4: - lowpan_dev_info the new naming scheme with this patch will be: - 6LoWPAN Generic: - lowpan_dev - LinkLayer 6LoWPAN: - BTLE - lowpan_btle_dev - 802.15.4: - lowpan_802154_dev Signed-off-by: Alexander Aring <aar@pengutronix.de> Reviewed-by: Stefan Schmidt<stefan@osg.samsung.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-04-086lowpan: iphc: fix handling of link-local compressionAlexander Aring1-2/+9
This patch fixes handling in case of link-local address compression. A IPv6 link-local address is defined as fe80::/10 prefix which is also what ipv6_addr_type checks for link-local addresses. But IPHC compression for link-local addresses are for fe80::/64 types only. This patch adds additional checks for zero padded bits in case of link-local address compression to match on a fe80::/64 address only. Signed-off-by: Alexander Aring <aar@pengutronix.de> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-03-106lowpan: iphc: fix SAM/DAM bit commentAlexander Aring1-2/+2
This patch fixes the comments for SAM/DAM value. Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-03-106lowpan: debugfs: add missing staticAlexander Aring1-2/+2
This patch solves the sparse warning: net/6lowpan/debugfs.c:164:30: warning: symbol 'lowpan_ctx_pfx_fops' was not declared. Should it be static? net/6lowpan/debugfs.c:241:30: warning: symbol 'lowpan_context_fops' was not declared. Should it be static? Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-02-266lowpan: iphc: fix invalid case handlingAlexander Aring1-2/+2
This patch fixes the return value in a case which should never occur. Instead returning "-EINVAL" we return LOWPAN_IPHC_DAM_00 which is invalid on context based addresses. Also change the WARN_ON_ONCE to WARN_ONCE which was suggested by Dan Carpenter. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-02-246lowpan: fix error checking codeAndrzej Hajda1-1/+1
Bool variable 'fail' is always non-negative, it indicates an error if it is true. The problem has been detected using coccinelle script scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Acked-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-02-246lowpan: iphc: fix stateful multicast compressionAlexander Aring1-1/+2
In case of multicast address we need to set always the LOWPAN_IPHC_M bit and if a destination context identifier was found for a multicast address then we need to set the LOWPAN_IPHC_DAC as well. Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-02-236lowpan: iphc: add support for stateful compressionAlexander Aring3-58/+642
This patch introduce support for IPHC stateful address compression. It will offer the context table via one debugfs entry. This debugfs has and directory for each cid entry for the context table. Inside each cid directory there exists the following files: - "active": If the entry is added or deleted. The context table is original a list implementation, this flag will indicate if the context is part of list or not. - "prefix": The ipv6 prefix. - "prefix_length": The prefix length for the prefix. - "compression": The compression flag according RFC6775. This part should be moved into sysfs after some testing time. Also the debugfs entry contains a "show" file which is a pretty-printout for the current context table information. Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-12-206lowpan: fix debugfs interface entry nameAlexander Aring1-3/+3
This patches moves the debugfs interface related register after netdevice register. The function lowpan_dev_debugfs_init will use "dev->name" which can be before register_netdevice a format string. The function register_netdevice will evaluate the format string if necessary and replace "dev->name" to the real interface name. Reported-by: Lukasz Duda <lukasz.duda@nordicsemi.no> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Lukasz Duda <lukasz.duda@nordicsemi.no> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-12-106lowpan: add debugfs supportAlexander Aring5-1/+117
This patch will introduce a 6lowpan entry into the debugfs if enabled. Inside this 6lowpan directory we create a subdirectories of all 6lowpan interfaces to offer a per interface debugfs support. Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-12-106lowpan: add lowpan dev register helpersAlexander Aring1-2/+31
This patch introduces register and unregister functionality for lowpan interfaces. While register a lowpan interface there are several things which need to be initialize by the 6lowpan subsystem. Upcoming functionality need to register/unregister per interface components e.g. debugfs entry. Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-12-106lowpan: add nhc module for GHC routing extension header detectionStefan Schmidt3-0/+34
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-12-106lowpan: add nhc module for GHC fragmentation extension header detectionStefan Schmidt3-0/+35
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-12-106lowpan: add nhc module for GHC destination extension header detectionStefan Schmidt3-0/+34
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-12-106lowpan: add nhc module for GHC ICMPv6 detectionStefan Schmidt3-0/+33
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-12-106lowpan: add nhc module for GHC UDP detectionStefan Schmidt3-0/+33
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-12-106lowpan: add nhc module for GHC hop-by-hopextension header detectionStefan Schmidt3-0/+36
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-12-106lowpan: clarify Kconfig entries for upcoming GHC supportStefan Schmidt1-2/+3
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-216lowpan: put mcast compression in an own functionAlexander Aring1-27/+32
This patch moves the mcast compression algorithmn to an own function like all other compression/decompression methods in iphc. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-216lowpan: rework tc and flow label handlingAlexander Aring1-85/+205
This patch reworks the handling of compression/decompression of traffic class and flow label handling. The current method is hard to understand, also doesn't checks if we can read the buffer from skb length. I tried to put the shifting operations into static inline functions and comment each steps which I did there to make it hopefully somewhat more readable. The big mess to deal with that is the that the ipv6 header bring the order "DSCP + ECN" but iphc uses "ECN + DSCP". Additional the DCSP + ECN bits are splitted in ipv6_hdr inside the priority and flow_lbl[0] fields. I tested these compressions by using fakelb 802.15.4 driver and manipulate the tc and flow label fields manually in function "__ip6_local_out" before the skb will be send to lower layers. Then I looked up the tc and flow label fields in wireshark on a wpan and lowpan interface. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-216lowpan: iphc: change define valuesAlexander Aring1-93/+106
This patch has the main goal to delete shift operations. Instead we doing masks and equals afterwards. E.g. for the SAM evaluation we masking only the SAM value which fits in iphc1 byte, then comparing with all possible SAM values over a switch case statement. We will not shifting the SAM value to somewhat readable anymore. Additional this patch slighty change the naming style like RFC 6282, e.g. TTL to HLIM and we will drop an errno now if CID flag is set, because we don't support it. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-216lowpan: move IPHC functionality definesAlexander Aring2-1/+109
This patch removes the IPHC related defines for doing bit manipulation from global 6lowpan header to the iphc file which should the only one implementation which use these defines. Also move next header compression defines to their nhc implementation. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-216lowpan: nhc: move iphc manipulation out of nhcAlexander Aring3-17/+14
This patch moves the iphc setting of next header commpression bit inside iphc functionality. Setting of IPHC bits should be happen at iphc.c file only. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-216lowpan: remove lowpan_fetch_skb_u8Alexander Aring1-2/+2
This patch removes the lowpan_fetch_skb_u8 function for getting the iphc bytes. Instead we using the generic which has a len parameter to tell the amount of bytes to fetch. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-216lowpan: cleanup lowpan_header_decompressAlexander Aring3-46/+73
This patch changes the lowpan_header_decompress function by removing inklayer related information from parameters. This is currently for supporting short and extended address for iphc handling in 802154. We don't support short address handling anyway right now, but there exists already code for handling short addresses in lowpan_header_decompress. The address parameters are also changed to a void pointer, so 6LoWPAN linklayer specific code can put complex structures as these parameters and cast it again inside the generic code by evaluating linklayer type before. The order is also changed by destination address at first and then source address, which is the same like all others functions where destination is always the first, memcpy, dev_hard_header, lowpan_header_compress, etc. This patch also moves the fetching of iphc values from 6LoWPAN linklayer specific code into the generic branch. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-216lowpan: cleanup lowpan_header_compressAlexander Aring1-10/+7
This patch changes the lowpan_header_compress function by removing unused parameters like "len" and drop static value parameters of protocol type. Instead we really check the protocol type inside inside the skb structure. Also we drop the use of IEEE802154_ADDR_LEN which is link-layer specific. Instead we using EUI64_ADDR_LEN which should always the default case for now. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-216lowpan: introduce LOWPAN_IPHC_MAX_HC_BUF_LENAlexander Aring1-1/+1
This patch introduces the LOWPAN_IPHC_MAX_HC_BUF_LEN define which represent the worst-case supported IPHC buffer length. It's used to allocate the stack buffer space for creating the IPHC header. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-10-086lowpan: move shared settings to lowpan_netdev_setupAlexander Aring1-0/+5
This patch moves values for all lowpan interface to the shared implementation of 6lowpan. This patch also quietly fixes the forgotten IFF_NO_QUEUE flag for the bluetooth 6LoWPAN interface. An identically commit is 4afbc0d ("net: 6lowpan: convert to using IFF_NO_QUEUE") which wasn't changed for bluetooth 6lowpan. All 6lowpan interfaces should be virtual with IFF_NO_QUEUE, using EUI64 address length, the mtu size is 1280 (IPV6_MIN_MTU) and the netdev type is ARPHRD_6LOWPAN. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-09-22ieee802154: change needed headroom/tailroomAlexander Aring1-2/+0
This patch cleanups needed_headroom, needed_tailroom and hard_header_len fields for wpan and lowpan interfaces. For wpan interfaces the worst case mac header len should be part of needed_headroom, currently this is set as hard_header_len, but hard_header_len should be set to the minimum header length which xmit call assumes and this is the minimum frame length of 802.15.4. The hard_header_len value will check inside send callbacl of AF_PACKET raw sockets. For lowpan interfaces, if fragmentation isn't needed the skb will call dev_hard_header for 802154 layer and queue it afterwards. This happens without new skb allocation, so we need the same headroom and tailroom lengths like 802154 inside 802154 6lowpan layer. At least we assume as minimum header length an ipv6 header size. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-09-17ieee820154: 6lowpan: dispatch evaluation reworkAlexander Aring2-2/+24
This patch complete reworks the evaluation of 6lowpan dispatch value by introducing a receive handler mechanism for each dispatch value. A list of changes: - Doing uncompression on-the-fly when FRAG1 is received, this require some special handling for 802.15.4 lltype in generic 6lowpan branch for setting the payload length correct. - Fix dispatch mask for fragmentation. - Add IPv6 dispatch evaluation for FRAG1. - Add skb_unshare for dispatch which might manipulate the skb data buffer. Cc: Jukka Rissanen <jukka.rissanen@linux.intel.com> Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-08-116lowpan: move module_init into core functionalityAlexander Aring2-19/+20
This patch moves module_init of 6lowpan module into core functionality of 6lowpan module. To load the ipv6 module at probing of the 6lowpan module should be core functionality. Loading next header compression modules is iphc specific. Nevertheless we only support IPHC for the generic 6LoWPAN branch right now so we can put it into the core functionality. If possible new compression formats are introduced nhc should load only when iphc is build. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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