This patch fixes all the issues with alignment matching of open
parenthesis found by checkpatch.pl and makes them follow the
network coding style now.

CHECK: Alignment should match open parenthesis
+static int uncompress_addr(struct sk_buff *skb,
+				struct in6_addr *ipaddr, const u8 address_mode,

CHECK: Alignment should match open parenthesis
+static int uncompress_context_based_src_addr(struct sk_buff *skb,
+						struct in6_addr *ipaddr,

CHECK: Alignment should match open parenthesis
+static int skb_deliver(struct sk_buff *skb, struct ipv6hdr *hdr,
+		struct net_device *dev, skb_delivery_cb deliver_skb)

CHECK: Alignment should match open parenthesis
+	new = skb_copy_expand(skb, sizeof(struct ipv6hdr), skb_tailroom(skb),
+								GFP_ATOMIC);

CHECK: Alignment should match open parenthesis
+	raw_dump_table(__func__, "raw skb data dump before receiving",
+			new->data, new->len);

CHECK: Alignment should match open parenthesis
+lowpan_uncompress_multicast_daddr(struct sk_buff *skb,
+		struct in6_addr *ipaddr,

CHECK: Alignment should match open parenthesis
+	raw_dump_inline(NULL, "Reconstructed ipv6 multicast addr is",
+				ipaddr->s6_addr, 16);

CHECK: Alignment should match open parenthesis
+int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
+		const u8 *saddr, const u8 saddr_type, const u8 saddr_len,

CHECK: Alignment should match open parenthesis
+	raw_dump_table(__func__, "raw skb data dump uncompressed",
+				skb->data, skb->len);

CHECK: Alignment should match open parenthesis
+		err = uncompress_addr(skb, &hdr.saddr, tmp, saddr,
+					saddr_type, saddr_len);

CHECK: Alignment should match open parenthesis
+		err = uncompress_addr(skb, &hdr.daddr, tmp, daddr,
+					daddr_type, daddr_len);

CHECK: Alignment should match open parenthesis
+		pr_debug("dest: stateless compression mode %d dest %pI6c\n",
+			tmp, &hdr.daddr);

CHECK: Alignment should match open parenthesis
+		raw_dump_table(__func__, "raw UDP header dump",
+				      (u8 *)&uh, sizeof(uh));

CHECK: Alignment should match open parenthesis
+	raw_dump_table(__func__, "raw header dump", (u8 *)&hdr,
+							sizeof(hdr));

CHECK: Alignment should match open parenthesis
+int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
+			unsigned short type, const void *_daddr,

CHECK: Alignment should match open parenthesis
+	raw_dump_table(__func__, "raw skb network header dump",
+		skb_network_header(skb), sizeof(struct ipv6hdr));

CHECK: Alignment should match open parenthesis
+	raw_dump_table(__func__,
+			"sending raw skb network uncompressed packet",

CHECK: Alignment should match open parenthesis
+	if (((hdr->flow_lbl[0] & 0x0F) == 0) &&
+	     (hdr->flow_lbl[1] == 0) && (hdr->flow_lbl[2] == 0)) {

WARNING: quoted string split across lines
+			pr_debug("dest address unicast link-local %pI6c "
+				"iphc1 0x%02x\n", &hdr->daddr, iphc1);

CHECK: Alignment should match open parenthesis
+	raw_dump_table(__func__, "raw skb data dump compressed",
+				skb->data, skb->len);
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

This patch fixes all the block comment issues found by checkpatch.pl and
makes them match the network style now.

WARNING: networking block comments don't use an empty /* line, use /* Comment...
+/*
+ * Based on patches from Jon Smirl <jonsmirl@gmail.com>

WARNING: networking block comments don't use an empty /* line, use /* Comment...
+/*
+ * Uncompress address function for source and

WARNING: networking block comments don't use an empty /* line, use /* Comment...
+/*
+ * Uncompress address function for source context

WARNING: networking block comments don't use an empty /* line, use /* Comment...
+		/*
+		 * UDP lenght needs to be infered from the lower layers

WARNING: networking block comments don't use an empty /* line, use /* Comment...
+	/*
+	 * Traffic Class and FLow Label carried in-line

WARNING: networking block comments don't use an empty /* line, use /* Comment...
+	/*
+	 * Traffic class carried in-line

WARNING: networking block comments don't use an empty /* line, use /* Comment...
+	/*
+	 * Flow Label carried in-line

WARNING: networking block comments don't use an empty /* line, use /* Comment...
+		/*
+		 * replace the compressed UDP head by the uncompressed UDP

WARNING: networking block comments don't use an empty /* line, use /* Comment...
+	/*
+	 * As we copy some bit-length fields, in the IPHC encoding bytes,

WARNING: networking block comments don't use an empty /* line, use /* Comment...
+	/*
+	 * Traffic class, flow label

WARNING: networking block comments don't use an empty /* line, use /* Comment...
+	/*
+	 * Hop limit
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

This memory is placed on stack and can't be null so remove the check on
null.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch removes the own implementation to check of link-layer,
broadcast and any address type and use the IPv6 api for that.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch uses the lowpan_push_hc_data functions in several places
where we can use it. The lowpan_push_hc_data was introduced in some
previous patches.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

We introduced the lowpan_fetch_skb function in some previous patches for
6lowpan to have a generic fetch function. This patch drops the old
function and use the generic lowpan_fetch_skb one.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The hc06_ptr pointer variable stands for header compression draft-06. We
are mostly rfc complaint. This patch rename the variable to normal hc_ptr.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch moves generic code which is used by bluetooth and ieee802154
6lowpan to a new net/6lowpan directory. This directory contains generic
6LoWPAN code which is shared between bluetooth and ieee802154 MAC-Layer.

This is the IPHC - "IPv6 Header Compression" format at the moment. Which
is described by RFC 6282 [0]. The BLTE 6LoWPAN draft describes that the
IPHC is the same format like IEEE 802.15.4, see [1].

Futuremore we can put more code into this directory which is shared
between BLTE and IEEE 802.15.4 6LoWPAN like RFC 6775 or the routing
protocol RPL RFC 6550.

To avoid naming conflicts I renamed 6lowpan-y to ieee802154_6lowpan-y
in net/ieee802154/Makefile.

[0] http://tools.ietf.org/html/rfc6282
[1] http://tools.ietf.org/html/draft-ietf-6lowpan-btle-12#section-3.2
[2] http://tools.ietf.org/html/rfc6775
[3] http://tools.ietf.org/html/rfc6550Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Acked-by: NJukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This header is used by bluetooth and ieee802154 branch. This patch
move this header to the include/net directory to avoid a use of a
relative path in include.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Since commit 8df8c56a, 6lowpan_iphc is a module of its own.

Unfortunately, it lacks some infrastructure to behave like a
good kernel citizen:

  kernel: 6lowpan_iphc: module license 'unspecified' taints kernel.
  kernel: Disabling lock debugging due to kernel taint

This patch adds the basic MODULE_LICENSE(); with GPL license:
the code was copied from net/ieee802154/6lowpan.c which is GPL
and the module exports symbol with EXPORT_SYMBOL_GPL();.

Cc: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Cc: Alexander Aring <alex.aring@gmail.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: NYann Droneaud <ydroneaud@opteya.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch remove unnecessary casts and brackets in compress_udp_header
function.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Cleanup code to handle both calculation in the same way.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Cleanup the lowpan_uncompress_udp_header function to use the
lowpan_fetch_skb function.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Bit 5 of "UDP LOWPAN_NHC Format" indicate that the checksum can be
elided.
The host need to calculate the udp checksum afterwards but this isn't
supported right now.

See:
http://tools.ietf.org/html/rfc6282#section-4.3.3Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The incoming udp header in lowpan_compress_udp_header function is
already in network byte order.

Everytime we read this values for source and destination port we need
to convert this value to host byte order.

In the outcoming header we need to set this value in network byte order
which the upcoming process assumes.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

In case ((ntohs(uh->source) & LOWPAN_NHC_UDP_8BIT_MASK) the order of
uncompression is wrong. It's always first source port then destination
port as second.

See:
http://tools.ietf.org/html/rfc6282#section-4.3.3

"Fields carried in-line (in part or in whole) appear in the same order
as they do in the UDP header format"
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch uses the lowpan_push_hc_data to generate iphc header.

The current implementation has some wrong pointer arithmetic issues and
works in a random case only.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

There are several issues on current debug behaviour.
This patch fix the following issues:

- Fix debug printout only if DEBUG is defined.
- Move debug functions of 6LoWPAN code into 6lowpan header.
- Cleanup codestyle of debug functions.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Because the IEEE 802154 and Bluetooth share the IP header compression
and uncompression code, the common code is moved to 6lowpan_iphc.c
file.
Signed-off-by: NJukka Rissanen <jukka.rissanen@linux.intel.com>
Acked-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>