6lowpan: move 6lowpan header to include/net

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: Alexander Aring <alex.aring@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>

6lowpan: move 6lowpan header to include/net
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: Alexander Aring <alex.aring@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Alexander Aring · David S. Miller
1 parent 91c6922745
Showing 6 changed files with 438 additions and 439 deletions Side-by-side Diff
include/net/6lowpan.h
net/bluetooth/6lowpan.c
net/ieee802154/6lowpan.h
net/ieee802154/6lowpan_iphc.c
net/ieee802154/6lowpan_rtnl.c
net/ieee802154/reassembly.c
+/*
+ * Copyright 2011, Siemens AG
+ * written by Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
+ */
+
+/*
+ * Based on patches from Jon Smirl <jonsmirl@gmail.com>
+ * Copyright (c) 2011 Jon Smirl <jonsmirl@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* Jon's code is based on 6lowpan implementation for Contiki which is:
+ * Copyright (c) 2008, Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef __6LOWPAN_H__
+#define __6LOWPAN_H__
+
+#include <net/ipv6.h>
+
+#define UIP_802154_SHORTADDR_LEN	2  /* compressed ipv6 address length */
+#define UIP_IPH_LEN			40 /* ipv6 fixed header size */
+#define UIP_PROTO_UDP			17 /* ipv6 next header value for UDP */
+#define UIP_FRAGH_LEN			8  /* ipv6 fragment header size */
+
+/*
+ * ipv6 address based on mac
+ * second bit-flip (Universe/Local) is done according RFC2464
+ */
+#define is_addr_mac_addr_based(a, m) \
+	((((a)->s6_addr[8])  == (((m)[0]) ^ 0x02)) &&	\
+	 (((a)->s6_addr[9])  == (m)[1]) &&		\
+	 (((a)->s6_addr[10]) == (m)[2]) &&		\
+	 (((a)->s6_addr[11]) == (m)[3]) &&		\
+	 (((a)->s6_addr[12]) == (m)[4]) &&		\
+	 (((a)->s6_addr[13]) == (m)[5]) &&		\
+	 (((a)->s6_addr[14]) == (m)[6]) &&		\
+	 (((a)->s6_addr[15]) == (m)[7]))
+
+/* ipv6 address is unspecified */
+#define is_addr_unspecified(a)		\
+	((((a)->s6_addr32[0]) == 0) &&	\
+	 (((a)->s6_addr32[1]) == 0) &&	\
+	 (((a)->s6_addr32[2]) == 0) &&	\
+	 (((a)->s6_addr32[3]) == 0))
+
+/* compare ipv6 addresses prefixes */
+#define ipaddr_prefixcmp(addr1, addr2, length) \
+	(memcmp(addr1, addr2, length >> 3) == 0)
+
+/* local link, i.e. FE80::/10 */
+#define is_addr_link_local(a) (((a)->s6_addr16[0]) == htons(0xFE80))
+
+/*
+ * check whether we can compress the IID to 16 bits,
+ * it's possible for unicast adresses with first 49 bits are zero only.
+ */
+#define lowpan_is_iid_16_bit_compressable(a)	\
+	((((a)->s6_addr16[4]) == 0) &&		\
+	 (((a)->s6_addr[10]) == 0) &&		\
+	 (((a)->s6_addr[11]) == 0xff) &&	\
+	 (((a)->s6_addr[12]) == 0xfe) &&	\
+	 (((a)->s6_addr[13]) == 0))
+
+/* multicast address */
+#define is_addr_mcast(a) (((a)->s6_addr[0]) == 0xFF)
+
+/* check whether the 112-bit gid of the multicast address is mappable to: */
+
+/* 9 bits, for FF02::1 (all nodes) and FF02::2 (all routers) addresses only. */
+#define lowpan_is_mcast_addr_compressable(a)	\
+	((((a)->s6_addr16[1]) == 0) &&		\
+	 (((a)->s6_addr16[2]) == 0) &&		\
+	 (((a)->s6_addr16[3]) == 0) &&		\
+	 (((a)->s6_addr16[4]) == 0) &&		\
+	 (((a)->s6_addr16[5]) == 0) &&		\
+	 (((a)->s6_addr16[6]) == 0) &&		\
+	 (((a)->s6_addr[14])  == 0) &&		\
+	 ((((a)->s6_addr[15]) == 1) || (((a)->s6_addr[15]) == 2)))
+
+/* 48 bits, FFXX::00XX:XXXX:XXXX */
+#define lowpan_is_mcast_addr_compressable48(a)	\
+	((((a)->s6_addr16[1]) == 0) &&		\
+	 (((a)->s6_addr16[2]) == 0) &&		\
+	 (((a)->s6_addr16[3]) == 0) &&		\
+	 (((a)->s6_addr16[4]) == 0) &&		\
+	 (((a)->s6_addr[10]) == 0))
+
+/* 32 bits, FFXX::00XX:XXXX */
+#define lowpan_is_mcast_addr_compressable32(a)	\
+	((((a)->s6_addr16[1]) == 0) &&		\
+	 (((a)->s6_addr16[2]) == 0) &&		\
+	 (((a)->s6_addr16[3]) == 0) &&		\
+	 (((a)->s6_addr16[4]) == 0) &&		\
+	 (((a)->s6_addr16[5]) == 0) &&		\
+	 (((a)->s6_addr[12]) == 0))
+
+/* 8 bits, FF02::00XX */
+#define lowpan_is_mcast_addr_compressable8(a)	\
+	((((a)->s6_addr[1])  == 2) &&		\
+	 (((a)->s6_addr16[1]) == 0) &&		\
+	 (((a)->s6_addr16[2]) == 0) &&		\
+	 (((a)->s6_addr16[3]) == 0) &&		\
+	 (((a)->s6_addr16[4]) == 0) &&		\
+	 (((a)->s6_addr16[5]) == 0) &&		\
+	 (((a)->s6_addr16[6]) == 0) &&		\
+	 (((a)->s6_addr[14]) == 0))
+
+#define lowpan_is_addr_broadcast(a)	\
+	((((a)[0]) == 0xFF) &&	\
+	 (((a)[1]) == 0xFF) &&	\
+	 (((a)[2]) == 0xFF) &&	\
+	 (((a)[3]) == 0xFF) &&	\
+	 (((a)[4]) == 0xFF) &&	\
+	 (((a)[5]) == 0xFF) &&	\
+	 (((a)[6]) == 0xFF) &&	\
+	 (((a)[7]) == 0xFF))
+
+#define LOWPAN_DISPATCH_IPV6	0x41 /* 01000001 = 65 */
+#define LOWPAN_DISPATCH_HC1	0x42 /* 01000010 = 66 */
+#define LOWPAN_DISPATCH_IPHC	0x60 /* 011xxxxx = ... */
+#define LOWPAN_DISPATCH_FRAG1	0xc0 /* 11000xxx */
+#define LOWPAN_DISPATCH_FRAGN	0xe0 /* 11100xxx */
+
+#define LOWPAN_DISPATCH_MASK	0xf8 /* 11111000 */
+
+#define LOWPAN_FRAG_TIMEOUT	(HZ * 60)	/* time-out 60 sec */
+
+#define LOWPAN_FRAG1_HEAD_SIZE	0x4
+#define LOWPAN_FRAGN_HEAD_SIZE	0x5
+
+/*
+ * According IEEE802.15.4 standard:
+ *   - MTU is 127 octets
+ *   - maximum MHR size is 37 octets
+ *   - MFR size is 2 octets
+ *
+ * so minimal payload size that we may guarantee is:
+ *   MTU - MHR - MFR = 88 octets
+ */
+#define LOWPAN_FRAG_SIZE	88
+
+/*
+ * Values of fields within the IPHC encoding first byte
+ * (C stands for compressed and I for inline)
+ */
+#define LOWPAN_IPHC_TF		0x18
+
+#define LOWPAN_IPHC_FL_C	0x10
+#define LOWPAN_IPHC_TC_C	0x08
+#define LOWPAN_IPHC_NH_C	0x04
+#define LOWPAN_IPHC_TTL_1	0x01
+#define LOWPAN_IPHC_TTL_64	0x02
+#define LOWPAN_IPHC_TTL_255	0x03
+#define LOWPAN_IPHC_TTL_I	0x00
+
+
+/* Values of fields within the IPHC encoding second byte */
+#define LOWPAN_IPHC_CID		0x80
+
+#define LOWPAN_IPHC_ADDR_00	0x00
+#define LOWPAN_IPHC_ADDR_01	0x01
+#define LOWPAN_IPHC_ADDR_02	0x02
+#define LOWPAN_IPHC_ADDR_03	0x03
+
+#define LOWPAN_IPHC_SAC		0x40
+#define LOWPAN_IPHC_SAM		0x30
+
+#define LOWPAN_IPHC_SAM_BIT	4
+
+#define LOWPAN_IPHC_M		0x08
+#define LOWPAN_IPHC_DAC		0x04
+#define LOWPAN_IPHC_DAM_00	0x00
+#define LOWPAN_IPHC_DAM_01	0x01
+#define LOWPAN_IPHC_DAM_10	0x02
+#define LOWPAN_IPHC_DAM_11	0x03
+
+#define LOWPAN_IPHC_DAM_BIT	0
+/*
+ * LOWPAN_UDP encoding (works together with IPHC)
+ */
+#define LOWPAN_NHC_UDP_MASK		0xF8
+#define LOWPAN_NHC_UDP_ID		0xF0
+#define LOWPAN_NHC_UDP_CHECKSUMC	0x04
+#define LOWPAN_NHC_UDP_CHECKSUMI	0x00
+
+#define LOWPAN_NHC_UDP_4BIT_PORT	0xF0B0
+#define LOWPAN_NHC_UDP_4BIT_MASK	0xFFF0
+#define LOWPAN_NHC_UDP_8BIT_PORT	0xF000
+#define LOWPAN_NHC_UDP_8BIT_MASK	0xFF00
+
+/* values for port compression, _with checksum_ ie bit 5 set to 0 */
+#define LOWPAN_NHC_UDP_CS_P_00	0xF0 /* all inline */
+#define LOWPAN_NHC_UDP_CS_P_01	0xF1 /* source 16bit inline,
+					dest = 0xF0 + 8 bit inline */
+#define LOWPAN_NHC_UDP_CS_P_10	0xF2 /* source = 0xF0 + 8bit inline,
+					dest = 16 bit inline */
+#define LOWPAN_NHC_UDP_CS_P_11	0xF3 /* source & dest = 0xF0B + 4bit inline */
+#define LOWPAN_NHC_UDP_CS_C	0x04 /* checksum elided */
+
+#ifdef DEBUG
+/* print data in line */
+static inline void raw_dump_inline(const char *caller, char *msg,
+				   unsigned char *buf, int len)
+{
+	if (msg)
+		pr_debug("%s():%s: ", caller, msg);
+
+	print_hex_dump_debug("", DUMP_PREFIX_NONE, 16, 1, buf, len, false);
+}
+
+/* print data in a table format:
+ *
+ * addr: xx xx xx xx xx xx
+ * addr: xx xx xx xx xx xx
+ * ...
+ */
+static inline void raw_dump_table(const char *caller, char *msg,
+				  unsigned char *buf, int len)
+{
+	if (msg)
+		pr_debug("%s():%s:\n", caller, msg);
+
+	print_hex_dump_debug("\t", DUMP_PREFIX_OFFSET, 16, 1, buf, len, false);
+}
+#else
+static inline void raw_dump_table(const char *caller, char *msg,
+				  unsigned char *buf, int len) { }
+static inline void raw_dump_inline(const char *caller, char *msg,
+				   unsigned char *buf, int len) { }
+#endif
+
+static inline int lowpan_fetch_skb_u8(struct sk_buff *skb, u8 *val)
+{
+	if (unlikely(!pskb_may_pull(skb, 1)))
+		return -EINVAL;
+
+	*val = skb->data[0];
+	skb_pull(skb, 1);
+
+	return 0;
+}
+
+static inline int lowpan_fetch_skb_u16(struct sk_buff *skb, u16 *val)
+{
+	if (unlikely(!pskb_may_pull(skb, 2)))
+		return -EINVAL;
+
+	*val = (skb->data[0] << 8) | skb->data[1];
+	skb_pull(skb, 2);
+
+	return 0;
+}
+
+static inline bool lowpan_fetch_skb(struct sk_buff *skb,
+		void *data, const unsigned int len)
+{
+	if (unlikely(!pskb_may_pull(skb, len)))
+		return true;
+
+	skb_copy_from_linear_data(skb, data, len);
+	skb_pull(skb, len);
+
+	return false;
+}
+
+static inline void lowpan_push_hc_data(u8 **hc_ptr, const void *data,
+				       const size_t len)
+{
+	memcpy(*hc_ptr, data, len);
+	*hc_ptr += len;
+}
+
+static inline u8 lowpan_addr_mode_size(const u8 addr_mode)
+{
+	static const u8 addr_sizes[] = {
+		[LOWPAN_IPHC_ADDR_00] = 16,
+		[LOWPAN_IPHC_ADDR_01] = 8,
+		[LOWPAN_IPHC_ADDR_02] = 2,
+		[LOWPAN_IPHC_ADDR_03] = 0,
+	};
+	return addr_sizes[addr_mode];
+}
+
+static inline u8 lowpan_next_hdr_size(const u8 h_enc, u16 *uncomp_header)
+{
+	u8 ret = 1;
+
+	if ((h_enc & LOWPAN_NHC_UDP_MASK) == LOWPAN_NHC_UDP_ID) {
+		*uncomp_header += sizeof(struct udphdr);
+
+		switch (h_enc & LOWPAN_NHC_UDP_CS_P_11) {
+		case LOWPAN_NHC_UDP_CS_P_00:
+			ret += 4;
+			break;
+		case LOWPAN_NHC_UDP_CS_P_01:
+		case LOWPAN_NHC_UDP_CS_P_10:
+			ret += 3;
+			break;
+		case LOWPAN_NHC_UDP_CS_P_11:
+			ret++;
+			break;
+		default:
+			break;
+		}
+
+		if (!(h_enc & LOWPAN_NHC_UDP_CS_C))
+			ret += 2;
+	}
+
+	return ret;
+}
+
+/**
+ *	lowpan_uncompress_size - returns skb->len size with uncompressed header
+ *	@skb: sk_buff with 6lowpan header inside
+ *	@datagram_offset: optional to get the datagram_offset value
+ *
+ *	Returns the skb->len with uncompressed header
+ */
+static inline u16
+lowpan_uncompress_size(const struct sk_buff *skb, u16 *dgram_offset)
+{
+	u16 ret = 2, uncomp_header = sizeof(struct ipv6hdr);
+	u8 iphc0, iphc1, h_enc;
+
+	iphc0 = skb_network_header(skb)[0];
+	iphc1 = skb_network_header(skb)[1];
+
+	switch ((iphc0 & LOWPAN_IPHC_TF) >> 3) {
+	case 0:
+		ret += 4;
+		break;
+	case 1:
+		ret += 3;
+		break;
+	case 2:
+		ret++;
+		break;
+	default:
+		break;
+	}
+
+	if (!(iphc0 & LOWPAN_IPHC_NH_C))
+		ret++;
+
+	if (!(iphc0 & 0x03))
+		ret++;
+
+	ret += lowpan_addr_mode_size((iphc1 & LOWPAN_IPHC_SAM) >>
+				     LOWPAN_IPHC_SAM_BIT);
+
+	if (iphc1 & LOWPAN_IPHC_M) {
+		switch ((iphc1 & LOWPAN_IPHC_DAM_11) >>
+			LOWPAN_IPHC_DAM_BIT) {
+		case LOWPAN_IPHC_DAM_00:
+			ret += 16;
+			break;
+		case LOWPAN_IPHC_DAM_01:
+			ret += 6;
+			break;
+		case LOWPAN_IPHC_DAM_10:
+			ret += 4;
+			break;
+		case LOWPAN_IPHC_DAM_11:
+			ret++;
+			break;
+		default:
+			break;
+		}
+	} else {
+		ret += lowpan_addr_mode_size((iphc1 & LOWPAN_IPHC_DAM_11) >>
+					     LOWPAN_IPHC_DAM_BIT);
+	}
+
+	if (iphc0 & LOWPAN_IPHC_NH_C) {
+		h_enc = skb_network_header(skb)[ret];
+		ret += lowpan_next_hdr_size(h_enc, &uncomp_header);
+	}
+
+	if (dgram_offset)
+		*dgram_offset = uncomp_header;
+
+	return skb->len + uncomp_header - ret;
+}
+
+typedef int (*skb_delivery_cb)(struct sk_buff *skb, struct net_device *dev);
+
+int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
+		const u8 *saddr, const u8 saddr_type, const u8 saddr_len,
+		const u8 *daddr, const u8 daddr_type, const u8 daddr_len,
+		u8 iphc0, u8 iphc1, skb_delivery_cb skb_deliver);
+int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
+			unsigned short type, const void *_daddr,
+			const void *_saddr, unsigned int len);
+
+#endif /* __6LOWPAN_H__ */
@@ -27,7 +27,7 @@
  
 #include "6lowpan.h"
  
-#include "../ieee802154/6lowpan.h" /* for the compression support */
+#include <net/6lowpan.h> /* for the compression support */
  
 #define IFACE_NAME_TEMPLATE "bt%d"
 #define EUI64_ADDR_LEN 8
-/*
- * Copyright 2011, Siemens AG
- * written by Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
- */
-
-/*
- * Based on patches from Jon Smirl <jonsmirl@gmail.com>
- * Copyright (c) 2011 Jon Smirl <jonsmirl@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-/* Jon's code is based on 6lowpan implementation for Contiki which is:
- * Copyright (c) 2008, Swedish Institute of Computer Science.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the Institute nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef __6LOWPAN_H__
-#define __6LOWPAN_H__
-
-#include <net/ipv6.h>
-
-#define UIP_802154_SHORTADDR_LEN	2  /* compressed ipv6 address length */
-#define UIP_IPH_LEN			40 /* ipv6 fixed header size */
-#define UIP_PROTO_UDP			17 /* ipv6 next header value for UDP */
-#define UIP_FRAGH_LEN			8  /* ipv6 fragment header size */
-
-/*
- * ipv6 address based on mac
- * second bit-flip (Universe/Local) is done according RFC2464
- */
-#define is_addr_mac_addr_based(a, m) \
-	((((a)->s6_addr[8])  == (((m)[0]) ^ 0x02)) &&	\
-	 (((a)->s6_addr[9])  == (m)[1]) &&		\
-	 (((a)->s6_addr[10]) == (m)[2]) &&		\
-	 (((a)->s6_addr[11]) == (m)[3]) &&		\
-	 (((a)->s6_addr[12]) == (m)[4]) &&		\
-	 (((a)->s6_addr[13]) == (m)[5]) &&		\
-	 (((a)->s6_addr[14]) == (m)[6]) &&		\
-	 (((a)->s6_addr[15]) == (m)[7]))
-
-/* ipv6 address is unspecified */
-#define is_addr_unspecified(a)		\
-	((((a)->s6_addr32[0]) == 0) &&	\
-	 (((a)->s6_addr32[1]) == 0) &&	\
-	 (((a)->s6_addr32[2]) == 0) &&	\
-	 (((a)->s6_addr32[3]) == 0))
-
-/* compare ipv6 addresses prefixes */
-#define ipaddr_prefixcmp(addr1, addr2, length) \
-	(memcmp(addr1, addr2, length >> 3) == 0)
-
-/* local link, i.e. FE80::/10 */
-#define is_addr_link_local(a) (((a)->s6_addr16[0]) == htons(0xFE80))
-
-/*
- * check whether we can compress the IID to 16 bits,
- * it's possible for unicast adresses with first 49 bits are zero only.
- */
-#define lowpan_is_iid_16_bit_compressable(a)	\
-	((((a)->s6_addr16[4]) == 0) &&		\
-	 (((a)->s6_addr[10]) == 0) &&		\
-	 (((a)->s6_addr[11]) == 0xff) &&	\
-	 (((a)->s6_addr[12]) == 0xfe) &&	\
-	 (((a)->s6_addr[13]) == 0))
-
-/* multicast address */
-#define is_addr_mcast(a) (((a)->s6_addr[0]) == 0xFF)
-
-/* check whether the 112-bit gid of the multicast address is mappable to: */
-
-/* 9 bits, for FF02::1 (all nodes) and FF02::2 (all routers) addresses only. */
-#define lowpan_is_mcast_addr_compressable(a)	\
-	((((a)->s6_addr16[1]) == 0) &&		\
-	 (((a)->s6_addr16[2]) == 0) &&		\
-	 (((a)->s6_addr16[3]) == 0) &&		\
-	 (((a)->s6_addr16[4]) == 0) &&		\
-	 (((a)->s6_addr16[5]) == 0) &&		\
-	 (((a)->s6_addr16[6]) == 0) &&		\
-	 (((a)->s6_addr[14])  == 0) &&		\
-	 ((((a)->s6_addr[15]) == 1) || (((a)->s6_addr[15]) == 2)))
-
-/* 48 bits, FFXX::00XX:XXXX:XXXX */
-#define lowpan_is_mcast_addr_compressable48(a)	\
-	((((a)->s6_addr16[1]) == 0) &&		\
-	 (((a)->s6_addr16[2]) == 0) &&		\
-	 (((a)->s6_addr16[3]) == 0) &&		\
-	 (((a)->s6_addr16[4]) == 0) &&		\
-	 (((a)->s6_addr[10]) == 0))
-
-/* 32 bits, FFXX::00XX:XXXX */
-#define lowpan_is_mcast_addr_compressable32(a)	\
-	((((a)->s6_addr16[1]) == 0) &&		\
-	 (((a)->s6_addr16[2]) == 0) &&		\
-	 (((a)->s6_addr16[3]) == 0) &&		\
-	 (((a)->s6_addr16[4]) == 0) &&		\
-	 (((a)->s6_addr16[5]) == 0) &&		\
-	 (((a)->s6_addr[12]) == 0))
-
-/* 8 bits, FF02::00XX */
-#define lowpan_is_mcast_addr_compressable8(a)	\
-	((((a)->s6_addr[1])  == 2) &&		\
-	 (((a)->s6_addr16[1]) == 0) &&		\
-	 (((a)->s6_addr16[2]) == 0) &&		\
-	 (((a)->s6_addr16[3]) == 0) &&		\
-	 (((a)->s6_addr16[4]) == 0) &&		\
-	 (((a)->s6_addr16[5]) == 0) &&		\
-	 (((a)->s6_addr16[6]) == 0) &&		\
-	 (((a)->s6_addr[14]) == 0))
-
-#define lowpan_is_addr_broadcast(a)	\
-	((((a)[0]) == 0xFF) &&	\
-	 (((a)[1]) == 0xFF) &&	\
-	 (((a)[2]) == 0xFF) &&	\
-	 (((a)[3]) == 0xFF) &&	\
-	 (((a)[4]) == 0xFF) &&	\
-	 (((a)[5]) == 0xFF) &&	\
-	 (((a)[6]) == 0xFF) &&	\
-	 (((a)[7]) == 0xFF))
-
-#define LOWPAN_DISPATCH_IPV6	0x41 /* 01000001 = 65 */
-#define LOWPAN_DISPATCH_HC1	0x42 /* 01000010 = 66 */
-#define LOWPAN_DISPATCH_IPHC	0x60 /* 011xxxxx = ... */
-#define LOWPAN_DISPATCH_FRAG1	0xc0 /* 11000xxx */
-#define LOWPAN_DISPATCH_FRAGN	0xe0 /* 11100xxx */
-
-#define LOWPAN_DISPATCH_MASK	0xf8 /* 11111000 */
-
-#define LOWPAN_FRAG_TIMEOUT	(HZ * 60)	/* time-out 60 sec */
-
-#define LOWPAN_FRAG1_HEAD_SIZE	0x4
-#define LOWPAN_FRAGN_HEAD_SIZE	0x5
-
-/*
- * According IEEE802.15.4 standard:
- *   - MTU is 127 octets
- *   - maximum MHR size is 37 octets
- *   - MFR size is 2 octets
- *
- * so minimal payload size that we may guarantee is:
- *   MTU - MHR - MFR = 88 octets
- */
-#define LOWPAN_FRAG_SIZE	88
-
-/*
- * Values of fields within the IPHC encoding first byte
- * (C stands for compressed and I for inline)
- */
-#define LOWPAN_IPHC_TF		0x18
-
-#define LOWPAN_IPHC_FL_C	0x10
-#define LOWPAN_IPHC_TC_C	0x08
-#define LOWPAN_IPHC_NH_C	0x04
-#define LOWPAN_IPHC_TTL_1	0x01
-#define LOWPAN_IPHC_TTL_64	0x02
-#define LOWPAN_IPHC_TTL_255	0x03
-#define LOWPAN_IPHC_TTL_I	0x00
-
-
-/* Values of fields within the IPHC encoding second byte */
-#define LOWPAN_IPHC_CID		0x80
-
-#define LOWPAN_IPHC_ADDR_00	0x00
-#define LOWPAN_IPHC_ADDR_01	0x01
-#define LOWPAN_IPHC_ADDR_02	0x02
-#define LOWPAN_IPHC_ADDR_03	0x03
-
-#define LOWPAN_IPHC_SAC		0x40
-#define LOWPAN_IPHC_SAM		0x30
-
-#define LOWPAN_IPHC_SAM_BIT	4
-
-#define LOWPAN_IPHC_M		0x08
-#define LOWPAN_IPHC_DAC		0x04
-#define LOWPAN_IPHC_DAM_00	0x00
-#define LOWPAN_IPHC_DAM_01	0x01
-#define LOWPAN_IPHC_DAM_10	0x02
-#define LOWPAN_IPHC_DAM_11	0x03
-
-#define LOWPAN_IPHC_DAM_BIT	0
-/*
- * LOWPAN_UDP encoding (works together with IPHC)
- */
-#define LOWPAN_NHC_UDP_MASK		0xF8
-#define LOWPAN_NHC_UDP_ID		0xF0
-#define LOWPAN_NHC_UDP_CHECKSUMC	0x04
-#define LOWPAN_NHC_UDP_CHECKSUMI	0x00
-
-#define LOWPAN_NHC_UDP_4BIT_PORT	0xF0B0
-#define LOWPAN_NHC_UDP_4BIT_MASK	0xFFF0
-#define LOWPAN_NHC_UDP_8BIT_PORT	0xF000
-#define LOWPAN_NHC_UDP_8BIT_MASK	0xFF00
-
-/* values for port compression, _with checksum_ ie bit 5 set to 0 */
-#define LOWPAN_NHC_UDP_CS_P_00	0xF0 /* all inline */
-#define LOWPAN_NHC_UDP_CS_P_01	0xF1 /* source 16bit inline,
-					dest = 0xF0 + 8 bit inline */
-#define LOWPAN_NHC_UDP_CS_P_10	0xF2 /* source = 0xF0 + 8bit inline,
-					dest = 16 bit inline */
-#define LOWPAN_NHC_UDP_CS_P_11	0xF3 /* source & dest = 0xF0B + 4bit inline */
-#define LOWPAN_NHC_UDP_CS_C	0x04 /* checksum elided */
-
-#ifdef DEBUG
-/* print data in line */
-static inline void raw_dump_inline(const char *caller, char *msg,
-				   unsigned char *buf, int len)
-{
-	if (msg)
-		pr_debug("%s():%s: ", caller, msg);
-
-	print_hex_dump_debug("", DUMP_PREFIX_NONE, 16, 1, buf, len, false);
-}
-
-/* print data in a table format:
- *
- * addr: xx xx xx xx xx xx
- * addr: xx xx xx xx xx xx
- * ...
- */
-static inline void raw_dump_table(const char *caller, char *msg,
-				  unsigned char *buf, int len)
-{
-	if (msg)
-		pr_debug("%s():%s:\n", caller, msg);
-
-	print_hex_dump_debug("\t", DUMP_PREFIX_OFFSET, 16, 1, buf, len, false);
-}
-#else
-static inline void raw_dump_table(const char *caller, char *msg,
-				  unsigned char *buf, int len) { }
-static inline void raw_dump_inline(const char *caller, char *msg,
-				   unsigned char *buf, int len) { }
-#endif
-
-static inline int lowpan_fetch_skb_u8(struct sk_buff *skb, u8 *val)
-{
-	if (unlikely(!pskb_may_pull(skb, 1)))
-		return -EINVAL;
-
-	*val = skb->data[0];
-	skb_pull(skb, 1);
-
-	return 0;
-}
-
-static inline int lowpan_fetch_skb_u16(struct sk_buff *skb, u16 *val)
-{
-	if (unlikely(!pskb_may_pull(skb, 2)))
-		return -EINVAL;
-
-	*val = (skb->data[0] << 8) | skb->data[1];
-	skb_pull(skb, 2);
-
-	return 0;
-}
-
-static inline bool lowpan_fetch_skb(struct sk_buff *skb,
-		void *data, const unsigned int len)
-{
-	if (unlikely(!pskb_may_pull(skb, len)))
-		return true;
-
-	skb_copy_from_linear_data(skb, data, len);
-	skb_pull(skb, len);
-
-	return false;
-}
-
-static inline void lowpan_push_hc_data(u8 **hc_ptr, const void *data,
-				       const size_t len)
-{
-	memcpy(*hc_ptr, data, len);
-	*hc_ptr += len;
-}
-
-static inline u8 lowpan_addr_mode_size(const u8 addr_mode)
-{
-	static const u8 addr_sizes[] = {
-		[LOWPAN_IPHC_ADDR_00] = 16,
-		[LOWPAN_IPHC_ADDR_01] = 8,
-		[LOWPAN_IPHC_ADDR_02] = 2,
-		[LOWPAN_IPHC_ADDR_03] = 0,
-	};
-	return addr_sizes[addr_mode];
-}
-
-static inline u8 lowpan_next_hdr_size(const u8 h_enc, u16 *uncomp_header)
-{
-	u8 ret = 1;
-
-	if ((h_enc & LOWPAN_NHC_UDP_MASK) == LOWPAN_NHC_UDP_ID) {
-		*uncomp_header += sizeof(struct udphdr);
-
-		switch (h_enc & LOWPAN_NHC_UDP_CS_P_11) {
-		case LOWPAN_NHC_UDP_CS_P_00:
-			ret += 4;
-			break;
-		case LOWPAN_NHC_UDP_CS_P_01:
-		case LOWPAN_NHC_UDP_CS_P_10:
-			ret += 3;
-			break;
-		case LOWPAN_NHC_UDP_CS_P_11:
-			ret++;
-			break;
-		default:
-			break;
-		}
-
-		if (!(h_enc & LOWPAN_NHC_UDP_CS_C))
-			ret += 2;
-	}
-
-	return ret;
-}
-
-/**
- *	lowpan_uncompress_size - returns skb->len size with uncompressed header
- *	@skb: sk_buff with 6lowpan header inside
- *	@datagram_offset: optional to get the datagram_offset value
- *
- *	Returns the skb->len with uncompressed header
- */
-static inline u16
-lowpan_uncompress_size(const struct sk_buff *skb, u16 *dgram_offset)
-{
-	u16 ret = 2, uncomp_header = sizeof(struct ipv6hdr);
-	u8 iphc0, iphc1, h_enc;
-
-	iphc0 = skb_network_header(skb)[0];
-	iphc1 = skb_network_header(skb)[1];
-
-	switch ((iphc0 & LOWPAN_IPHC_TF) >> 3) {
-	case 0:
-		ret += 4;
-		break;
-	case 1:
-		ret += 3;
-		break;
-	case 2:
-		ret++;
-		break;
-	default:
-		break;
-	}
-
-	if (!(iphc0 & LOWPAN_IPHC_NH_C))
-		ret++;
-
-	if (!(iphc0 & 0x03))
-		ret++;
-
-	ret += lowpan_addr_mode_size((iphc1 & LOWPAN_IPHC_SAM) >>
-				     LOWPAN_IPHC_SAM_BIT);
-
-	if (iphc1 & LOWPAN_IPHC_M) {
-		switch ((iphc1 & LOWPAN_IPHC_DAM_11) >>
-			LOWPAN_IPHC_DAM_BIT) {
-		case LOWPAN_IPHC_DAM_00:
-			ret += 16;
-			break;
-		case LOWPAN_IPHC_DAM_01:
-			ret += 6;
-			break;
-		case LOWPAN_IPHC_DAM_10:
-			ret += 4;
-			break;
-		case LOWPAN_IPHC_DAM_11:
-			ret++;
-			break;
-		default:
-			break;
-		}
-	} else {
-		ret += lowpan_addr_mode_size((iphc1 & LOWPAN_IPHC_DAM_11) >>
-					     LOWPAN_IPHC_DAM_BIT);
-	}
-
-	if (iphc0 & LOWPAN_IPHC_NH_C) {
-		h_enc = skb_network_header(skb)[ret];
-		ret += lowpan_next_hdr_size(h_enc, &uncomp_header);
-	}
-
-	if (dgram_offset)
-		*dgram_offset = uncomp_header;
-
-	return skb->len + uncomp_header - ret;
-}
-
-typedef int (*skb_delivery_cb)(struct sk_buff *skb, struct net_device *dev);
-
-int lowpan_process_data(struct sk_buff *skb, struct net_device *dev,
-		const u8 *saddr, const u8 saddr_type, const u8 saddr_len,
-		const u8 *daddr, const u8 daddr_type, const u8 daddr_len,
-		u8 iphc0, u8 iphc1, skb_delivery_cb skb_deliver);
-int lowpan_header_compress(struct sk_buff *skb, struct net_device *dev,
-			unsigned short type, const void *_daddr,
-			const void *_saddr, unsigned int len);
-
-#endif /* __6LOWPAN_H__ */
@@ -54,10 +54,9 @@
 #include <linux/if_arp.h>
 #include <linux/module.h>
 #include <linux/netdevice.h>
+#include <net/6lowpan.h>
 #include <net/ipv6.h>
 #include <net/af_ieee802154.h>
-
-#include "6lowpan.h"
  
 /*
  * Uncompress address function for source and
@@ -52,10 +52,10 @@
 #include <net/af_ieee802154.h>
 #include <net/ieee802154.h>
 #include <net/ieee802154_netdev.h>
+#include <net/6lowpan.h>
 #include <net/ipv6.h>
  
 #include "reassembly.h"
-#include "6lowpan.h"
  
 static LIST_HEAD(lowpan_devices);
  
@@ -24,10 +24,10 @@
 #include <linux/export.h>
  
 #include <net/ieee802154_netdev.h>
+#include <net/6lowpan.h>
 #include <net/ipv6.h>
 #include <net/inet_frag.h>
  
-#include "6lowpan.h"
 #include "reassembly.h"
  
 static struct inet_frags lowpan_frags;
	1	+/*
	2	+ * Copyright 2011, Siemens AG
	3	+ * written by Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
	4	+ */
	5	+
	6	+/*
	7	+ * Based on patches from Jon Smirl <jonsmirl@gmail.com>
	8	+ * Copyright (c) 2011 Jon Smirl <jonsmirl@gmail.com>
	9	+ *
	10	+ * This program is free software; you can redistribute it and/or modify
	11	+ * it under the terms of the GNU General Public License version 2
	12	+ * as published by the Free Software Foundation.
	13	+ *
	14	+ * This program is distributed in the hope that it will be useful,
	15	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	+ * GNU General Public License for more details.
	18	+ *
	19	+ * You should have received a copy of the GNU General Public License along
	20	+ * with this program; if not, write to the Free Software Foundation, Inc.,
	21	+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	22	+ */
	23	+
	24	+/* Jon's code is based on 6lowpan implementation for Contiki which is:
	25	+ * Copyright (c) 2008, Swedish Institute of Computer Science.
	26	+ * All rights reserved.
	27	+ *
	28	+ * Redistribution and use in source and binary forms, with or without
	29	+ * modification, are permitted provided that the following conditions
	30	+ * are met:
	31	+ * 1. Redistributions of source code must retain the above copyright
	32	+ * notice, this list of conditions and the following disclaimer.
	33	+ * 2. Redistributions in binary form must reproduce the above copyright
	34	+ * notice, this list of conditions and the following disclaimer in the
	35	+ * documentation and/or other materials provided with the distribution.
	36	+ * 3. Neither the name of the Institute nor the names of its contributors
	37	+ * may be used to endorse or promote products derived from this software
	38	+ * without specific prior written permission.
	39	+ *
	40	+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
	41	+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	42	+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	43	+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
	44	+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	45	+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	46	+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	47	+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	48	+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	49	+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	50	+ * SUCH DAMAGE.
	51	+ */
	52	+
	53	+#ifndef __6LOWPAN_H__
	54	+#define __6LOWPAN_H__
	55	+
	56	+#include <net/ipv6.h>
	57	+
	58	+#define UIP_802154_SHORTADDR_LEN 2 /* compressed ipv6 address length */
	59	+#define UIP_IPH_LEN 40 /* ipv6 fixed header size */
	60	+#define UIP_PROTO_UDP 17 /* ipv6 next header value for UDP */
	61	+#define UIP_FRAGH_LEN 8 /* ipv6 fragment header size */
	62	+
	63	+/*
	64	+ * ipv6 address based on mac
	65	+ * second bit-flip (Universe/Local) is done according RFC2464
	66	+ */
	67	+#define is_addr_mac_addr_based(a, m) \
	68	+ ((((a)->s6_addr[8]) == (((m)[0]) ^ 0x02)) && \
	69	+ (((a)->s6_addr[9]) == (m)[1]) && \
	70	+ (((a)->s6_addr[10]) == (m)[2]) && \
	71	+ (((a)->s6_addr[11]) == (m)[3]) && \
	72	+ (((a)->s6_addr[12]) == (m)[4]) && \
	73	+ (((a)->s6_addr[13]) == (m)[5]) && \
	74	+ (((a)->s6_addr[14]) == (m)[6]) && \
	75	+ (((a)->s6_addr[15]) == (m)[7]))
	76	+
	77	+/* ipv6 address is unspecified */
	78	+#define is_addr_unspecified(a) \
	79	+ ((((a)->s6_addr32[0]) == 0) && \
	80	+ (((a)->s6_addr32[1]) == 0) && \
	81	+ (((a)->s6_addr32[2]) == 0) && \
	82	+ (((a)->s6_addr32[3]) == 0))
	83	+
	84	+/* compare ipv6 addresses prefixes */
	85	+#define ipaddr_prefixcmp(addr1, addr2, length) \
	86	+ (memcmp(addr1, addr2, length >> 3) == 0)
	87	+
	88	+/* local link, i.e. FE80::/10 */
	89	+#define is_addr_link_local(a) (((a)->s6_addr16[0]) == htons(0xFE80))
	90	+
	91	+/*
	92	+ * check whether we can compress the IID to 16 bits,
	93	+ * it's possible for unicast adresses with first 49 bits are zero only.
	94	+ */
	95	+#define lowpan_is_iid_16_bit_compressable(a) \
	96	+ ((((a)->s6_addr16[4]) == 0) && \
	97	+ (((a)->s6_addr[10]) == 0) && \
	98	+ (((a)->s6_addr[11]) == 0xff) && \
	99	+ (((a)->s6_addr[12]) == 0xfe) && \
	100	+ (((a)->s6_addr[13]) == 0))
	101	+
	102	+/* multicast address */
	103	+#define is_addr_mcast(a) (((a)->s6_addr[0]) == 0xFF)
	104	+
	105	+/* check whether the 112-bit gid of the multicast address is mappable to: */
	106	+
	107	+/* 9 bits, for FF02::1 (all nodes) and FF02::2 (all routers) addresses only. */
	108	+#define lowpan_is_mcast_addr_compressable(a) \
	109	+ ((((a)->s6_addr16[1]) == 0) && \
	110	+ (((a)->s6_addr16[2]) == 0) && \
	111	+ (((a)->s6_addr16[3]) == 0) && \
	112	+ (((a)->s6_addr16[4]) == 0) && \
	113	+ (((a)->s6_addr16[5]) == 0) && \
	114	+ (((a)->s6_addr16[6]) == 0) && \
	115	+ (((a)->s6_addr[14]) == 0) && \
	116	+ ((((a)->s6_addr[15]) == 1) \|\| (((a)->s6_addr[15]) == 2)))
	117	+
	118	+/* 48 bits, FFXX::00XX:XXXX:XXXX */
	119	+#define lowpan_is_mcast_addr_compressable48(a) \
	120	+ ((((a)->s6_addr16[1]) == 0) && \
	121	+ (((a)->s6_addr16[2]) == 0) && \
	122	+ (((a)->s6_addr16[3]) == 0) && \
	123	+ (((a)->s6_addr16[4]) == 0) && \
	124	+ (((a)->s6_addr[10]) == 0))
	125	+
	126	+/* 32 bits, FFXX::00XX:XXXX */
	127	+#define lowpan_is_mcast_addr_compressable32(a) \
	128	+ ((((a)->s6_addr16[1]) == 0) && \
	129	+ (((a)->s6_addr16[2]) == 0) && \
	130	+ (((a)->s6_addr16[3]) == 0) && \
	131	+ (((a)->s6_addr16[4]) == 0) && \
	132	+ (((a)->s6_addr16[5]) == 0) && \
	133	+ (((a)->s6_addr[12]) == 0))
	134	+
	135	+/* 8 bits, FF02::00XX */
	136	+#define lowpan_is_mcast_addr_compressable8(a) \
	137	+ ((((a)->s6_addr[1]) == 2) && \
	138	+ (((a)->s6_addr16[1]) == 0) && \
	139	+ (((a)->s6_addr16[2]) == 0) && \
	140	+ (((a)->s6_addr16[3]) == 0) && \
	141	+ (((a)->s6_addr16[4]) == 0) && \
	142	+ (((a)->s6_addr16[5]) == 0) && \
	143	+ (((a)->s6_addr16[6]) == 0) && \
	144	+ (((a)->s6_addr[14]) == 0))
	145	+
	146	+#define lowpan_is_addr_broadcast(a) \
	147	+ ((((a)[0]) == 0xFF) && \
	148	+ (((a)[1]) == 0xFF) && \
	149	+ (((a)[2]) == 0xFF) && \
	150	+ (((a)[3]) == 0xFF) && \
	151	+ (((a)[4]) == 0xFF) && \
	152	+ (((a)[5]) == 0xFF) && \
	153	+ (((a)[6]) == 0xFF) && \
	154	+ (((a)[7]) == 0xFF))
	155	+
	156	+#define LOWPAN_DISPATCH_IPV6 0x41 /* 01000001 = 65 */
	157	+#define LOWPAN_DISPATCH_HC1 0x42 /* 01000010 = 66 */
	158	+#define LOWPAN_DISPATCH_IPHC 0x60 /* 011xxxxx = ... */
	159	+#define LOWPAN_DISPATCH_FRAG1 0xc0 /* 11000xxx */
	160	+#define LOWPAN_DISPATCH_FRAGN 0xe0 /* 11100xxx */
	161	+
	162	+#define LOWPAN_DISPATCH_MASK 0xf8 /* 11111000 */
	163	+
	164	+#define LOWPAN_FRAG_TIMEOUT (HZ * 60) /* time-out 60 sec */
	165	+
	166	+#define LOWPAN_FRAG1_HEAD_SIZE 0x4
	167	+#define LOWPAN_FRAGN_HEAD_SIZE 0x5
	168	+
	169	+/*
	170	+ * According IEEE802.15.4 standard:
	171	+ * - MTU is 127 octets
	172	+ * - maximum MHR size is 37 octets
	173	+ * - MFR size is 2 octets
	174	+ *
	175	+ * so minimal payload size that we may guarantee is:
	176	+ * MTU - MHR - MFR = 88 octets
	177	+ */
	178	+#define LOWPAN_FRAG_SIZE 88
	179	+
	180	+/*
	181	+ * Values of fields within the IPHC encoding first byte
	182	+ * (C stands for compressed and I for inline)
	183	+ */
	184	+#define LOWPAN_IPHC_TF 0x18
	185	+
	186	+#define LOWPAN_IPHC_FL_C 0x10
	187	+#define LOWPAN_IPHC_TC_C 0x08
	188	+#define LOWPAN_IPHC_NH_C 0x04
	189	+#define LOWPAN_IPHC_TTL_1 0x01
	190	+#define LOWPAN_IPHC_TTL_64 0x02
	191	+#define LOWPAN_IPHC_TTL_255 0x03
	192	+#define LOWPAN_IPHC_TTL_I 0x00
	193	+
	194	+
	195	+/* Values of fields within the IPHC encoding second byte */
	196	+#define LOWPAN_IPHC_CID 0x80
	197	+
	198	+#define LOWPAN_IPHC_ADDR_00 0x00
	199	+#define LOWPAN_IPHC_ADDR_01 0x01
	200	+#define LOWPAN_IPHC_ADDR_02 0x02
	201	+#define LOWPAN_IPHC_ADDR_03 0x03
	202	+
	203	+#define LOWPAN_IPHC_SAC 0x40
	204	+#define LOWPAN_IPHC_SAM 0x30
	205	+
	206	+#define LOWPAN_IPHC_SAM_BIT 4
	207	+
	208	+#define LOWPAN_IPHC_M 0x08
	209	+#define LOWPAN_IPHC_DAC 0x04
	210	+#define LOWPAN_IPHC_DAM_00 0x00
	211	+#define LOWPAN_IPHC_DAM_01 0x01
	212	+#define LOWPAN_IPHC_DAM_10 0x02
	213	+#define LOWPAN_IPHC_DAM_11 0x03
	214	+
	215	+#define LOWPAN_IPHC_DAM_BIT 0
	216	+/*
	217	+ * LOWPAN_UDP encoding (works together with IPHC)
	218	+ */
	219	+#define LOWPAN_NHC_UDP_MASK 0xF8
	220	+#define LOWPAN_NHC_UDP_ID 0xF0
	221	+#define LOWPAN_NHC_UDP_CHECKSUMC 0x04
	222	+#define LOWPAN_NHC_UDP_CHECKSUMI 0x00
	223	+
	224	+#define LOWPAN_NHC_UDP_4BIT_PORT 0xF0B0
	225	+#define LOWPAN_NHC_UDP_4BIT_MASK 0xFFF0
	226	+#define LOWPAN_NHC_UDP_8BIT_PORT 0xF000
	227	+#define LOWPAN_NHC_UDP_8BIT_MASK 0xFF00
	228	+
	229	+/* values for port compression, _with checksum_ ie bit 5 set to 0 */
	230	+#define LOWPAN_NHC_UDP_CS_P_00 0xF0 /* all inline */
	231	+#define LOWPAN_NHC_UDP_CS_P_01 0xF1 /* source 16bit inline,
	232	+ dest = 0xF0 + 8 bit inline */
	233	+#define LOWPAN_NHC_UDP_CS_P_10 0xF2 /* source = 0xF0 + 8bit inline,
	234	+ dest = 16 bit inline */
	235	+#define LOWPAN_NHC_UDP_CS_P_11 0xF3 /* source & dest = 0xF0B + 4bit inline */
	236	+#define LOWPAN_NHC_UDP_CS_C 0x04 /* checksum elided */
	237	+
	238	+#ifdef DEBUG
	239	+/* print data in line */
	240	+static inline void raw_dump_inline(const char caller, char msg,
	241	+ unsigned char *buf, int len)
	242	+{
	243	+ if (msg)
	244	+ pr_debug("%s():%s: ", caller, msg);
	245	+
	246	+ print_hex_dump_debug("", DUMP_PREFIX_NONE, 16, 1, buf, len, false);
	247	+}
	248	+
	249	+/* print data in a table format:
	250	+ *
	251	+ * addr: xx xx xx xx xx xx
	252	+ * addr: xx xx xx xx xx xx
	253	+ * ...
	254	+ */
	255	+static inline void raw_dump_table(const char caller, char msg,
	256	+ unsigned char *buf, int len)
	257	+{
	258	+ if (msg)
	259	+ pr_debug("%s():%s:\n", caller, msg);
	260	+
	261	+ print_hex_dump_debug("\t", DUMP_PREFIX_OFFSET, 16, 1, buf, len, false);
	262	+}
	263	+#else
	264	+static inline void raw_dump_table(const char caller, char msg,
	265	+ unsigned char *buf, int len) { }
	266	+static inline void raw_dump_inline(const char caller, char msg,
	267	+ unsigned char *buf, int len) { }
	268	+#endif
	269	+
	270	+static inline int lowpan_fetch_skb_u8(struct sk_buff skb, u8 val)
	271	+{
	272	+ if (unlikely(!pskb_may_pull(skb, 1)))
	273	+ return -EINVAL;
	274	+
	275	+ *val = skb->data[0];
	276	+ skb_pull(skb, 1);
	277	+
	278	+ return 0;
	279	+}
	280	+
	281	+static inline int lowpan_fetch_skb_u16(struct sk_buff skb, u16 val)
	282	+{
	283	+ if (unlikely(!pskb_may_pull(skb, 2)))
	284	+ return -EINVAL;
	285	+
	286	+ *val = (skb->data[0] << 8) \| skb->data[1];
	287	+ skb_pull(skb, 2);
	288	+
	289	+ return 0;
	290	+}
	291	+
	292	+static inline bool lowpan_fetch_skb(struct sk_buff *skb,
	293	+ void *data, const unsigned int len)
	294	+{
	295	+ if (unlikely(!pskb_may_pull(skb, len)))
	296	+ return true;
	297	+
	298	+ skb_copy_from_linear_data(skb, data, len);
	299	+ skb_pull(skb, len);
	300	+
	301	+ return false;
	302	+}
	303	+
	304	+static inline void lowpan_push_hc_data(u8 *hc_ptr, const void data,
	305	+ const size_t len)
	306	+{
	307	+ memcpy(*hc_ptr, data, len);
	308	+ *hc_ptr += len;
	309	+}
	310	+
	311	+static inline u8 lowpan_addr_mode_size(const u8 addr_mode)
	312	+{
	313	+ static const u8 addr_sizes[] = {
	314	+ [LOWPAN_IPHC_ADDR_00] = 16,
	315	+ [LOWPAN_IPHC_ADDR_01] = 8,
	316	+ [LOWPAN_IPHC_ADDR_02] = 2,
	317	+ [LOWPAN_IPHC_ADDR_03] = 0,
	318	+ };
	319	+ return addr_sizes[addr_mode];
	320	+}
	321	+
	322	+static inline u8 lowpan_next_hdr_size(const u8 h_enc, u16 *uncomp_header)
	323	+{
	324	+ u8 ret = 1;
	325	+
	326	+ if ((h_enc & LOWPAN_NHC_UDP_MASK) == LOWPAN_NHC_UDP_ID) {
	327	+ *uncomp_header += sizeof(struct udphdr);
	328	+
	329	+ switch (h_enc & LOWPAN_NHC_UDP_CS_P_11) {
	330	+ case LOWPAN_NHC_UDP_CS_P_00:
	331	+ ret += 4;
	332	+ break;
	333	+ case LOWPAN_NHC_UDP_CS_P_01:
	334	+ case LOWPAN_NHC_UDP_CS_P_10:
	335	+ ret += 3;
	336	+ break;
	337	+ case LOWPAN_NHC_UDP_CS_P_11:
	338	+ ret++;
	339	+ break;
	340	+ default:
	341	+ break;
	342	+ }
	343	+
	344	+ if (!(h_enc & LOWPAN_NHC_UDP_CS_C))
	345	+ ret += 2;
	346	+ }
	347	+
	348	+ return ret;
	349	+}
	350	+
	351	+/**
	352	+ * lowpan_uncompress_size - returns skb->len size with uncompressed header
	353	+ * @skb: sk_buff with 6lowpan header inside
	354	+ * @datagram_offset: optional to get the datagram_offset value
	355	+ *
	356	+ * Returns the skb->len with uncompressed header
	357	+ */
	358	+static inline u16
	359	+lowpan_uncompress_size(const struct sk_buff skb, u16 dgram_offset)
	360	+{
	361	+ u16 ret = 2, uncomp_header = sizeof(struct ipv6hdr);
	362	+ u8 iphc0, iphc1, h_enc;
	363	+
	364	+ iphc0 = skb_network_header(skb)[0];
	365	+ iphc1 = skb_network_header(skb)[1];
	366	+
	367	+ switch ((iphc0 & LOWPAN_IPHC_TF) >> 3) {
	368	+ case 0:
	369	+ ret += 4;
	370	+ break;
	371	+ case 1:
	372	+ ret += 3;
	373	+ break;
	374	+ case 2:
	375	+ ret++;
	376	+ break;
	377	+ default:
	378	+ break;
	379	+ }
	380	+
	381	+ if (!(iphc0 & LOWPAN_IPHC_NH_C))
	382	+ ret++;
	383	+
	384	+ if (!(iphc0 & 0x03))
	385	+ ret++;
	386	+
	387	+ ret += lowpan_addr_mode_size((iphc1 & LOWPAN_IPHC_SAM) >>
	388	+ LOWPAN_IPHC_SAM_BIT);
	389	+
	390	+ if (iphc1 & LOWPAN_IPHC_M) {
	391	+ switch ((iphc1 & LOWPAN_IPHC_DAM_11) >>
	392	+ LOWPAN_IPHC_DAM_BIT) {
	393	+ case LOWPAN_IPHC_DAM_00:
	394	+ ret += 16;
	395	+ break;
	396	+ case LOWPAN_IPHC_DAM_01:
	397	+ ret += 6;
	398	+ break;
	399	+ case LOWPAN_IPHC_DAM_10:
	400	+ ret += 4;
	401	+ break;
	402	+ case LOWPAN_IPHC_DAM_11:
	403	+ ret++;
	404	+ break;
	405	+ default:
	406	+ break;
	407	+ }
	408	+ } else {
	409	+ ret += lowpan_addr_mode_size((iphc1 & LOWPAN_IPHC_DAM_11) >>
	410	+ LOWPAN_IPHC_DAM_BIT);
	411	+ }
	412	+
	413	+ if (iphc0 & LOWPAN_IPHC_NH_C) {
	414	+ h_enc = skb_network_header(skb)[ret];
	415	+ ret += lowpan_next_hdr_size(h_enc, &uncomp_header);
	416	+ }
	417	+
	418	+ if (dgram_offset)
	419	+ *dgram_offset = uncomp_header;
	420	+
	421	+ return skb->len + uncomp_header - ret;
	422	+}
	423	+
	424	+typedef int (skb_delivery_cb)(struct sk_buff skb, struct net_device *dev);
	425	+
	426	+int lowpan_process_data(struct sk_buff skb, struct net_device dev,
	427	+ const u8 *saddr, const u8 saddr_type, const u8 saddr_len,
	428	+ const u8 *daddr, const u8 daddr_type, const u8 daddr_len,
	429	+ u8 iphc0, u8 iphc1, skb_delivery_cb skb_deliver);
	430	+int lowpan_header_compress(struct sk_buff skb, struct net_device dev,
	431	+ unsigned short type, const void *_daddr,
	432	+ const void *_saddr, unsigned int len);
	433	+
	434	+#endif /* __6LOWPAN_H__ */
...	...	@@ -27,7 +27,7 @@
27	27
28	28	#include "6lowpan.h"
29	29
30		-#include "../ieee802154/6lowpan.h" /* for the compression support */
	30	+#include <net/6lowpan.h> /* for the compression support */
31	31
32	32	#define IFACE_NAME_TEMPLATE "bt%d"
33	33	#define EUI64_ADDR_LEN 8
1		-/*
2		- * Copyright 2011, Siemens AG
3		- * written by Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
4		- */
5		-
6		-/*
7		- * Based on patches from Jon Smirl <jonsmirl@gmail.com>
8		- * Copyright (c) 2011 Jon Smirl <jonsmirl@gmail.com>
9		- *
10		- * This program is free software; you can redistribute it and/or modify
11		- * it under the terms of the GNU General Public License version 2
12		- * as published by the Free Software Foundation.
13		- *
14		- * This program is distributed in the hope that it will be useful,
15		- * but WITHOUT ANY WARRANTY; without even the implied warranty of
16		- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17		- * GNU General Public License for more details.
18		- *
19		- * You should have received a copy of the GNU General Public License along
20		- * with this program; if not, write to the Free Software Foundation, Inc.,
21		- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22		- */
23		-
24		-/* Jon's code is based on 6lowpan implementation for Contiki which is:
25		- * Copyright (c) 2008, Swedish Institute of Computer Science.
26		- * All rights reserved.
27		- *
28		- * Redistribution and use in source and binary forms, with or without
29		- * modification, are permitted provided that the following conditions
30		- * are met:
31		- * 1. Redistributions of source code must retain the above copyright
32		- * notice, this list of conditions and the following disclaimer.
33		- * 2. Redistributions in binary form must reproduce the above copyright
34		- * notice, this list of conditions and the following disclaimer in the
35		- * documentation and/or other materials provided with the distribution.
36		- * 3. Neither the name of the Institute nor the names of its contributors
37		- * may be used to endorse or promote products derived from this software
38		- * without specific prior written permission.
39		- *
40		- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
41		- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42		- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43		- * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
44		- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45		- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46		- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47		- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48		- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49		- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50		- * SUCH DAMAGE.
51		- */
52		-
53		-#ifndef __6LOWPAN_H__
54		-#define __6LOWPAN_H__
55		-
56		-#include <net/ipv6.h>
57		-
58		-#define UIP_802154_SHORTADDR_LEN 2 /* compressed ipv6 address length */
59		-#define UIP_IPH_LEN 40 /* ipv6 fixed header size */
60		-#define UIP_PROTO_UDP 17 /* ipv6 next header value for UDP */
61		-#define UIP_FRAGH_LEN 8 /* ipv6 fragment header size */
62		-
63		-/*
64		- * ipv6 address based on mac
65		- * second bit-flip (Universe/Local) is done according RFC2464
66		- */
67		-#define is_addr_mac_addr_based(a, m) \
68		- ((((a)->s6_addr[8]) == (((m)[0]) ^ 0x02)) && \
69		- (((a)->s6_addr[9]) == (m)[1]) && \
70		- (((a)->s6_addr[10]) == (m)[2]) && \
71		- (((a)->s6_addr[11]) == (m)[3]) && \
72		- (((a)->s6_addr[12]) == (m)[4]) && \
73		- (((a)->s6_addr[13]) == (m)[5]) && \
74		- (((a)->s6_addr[14]) == (m)[6]) && \
75		- (((a)->s6_addr[15]) == (m)[7]))
76		-
77		-/* ipv6 address is unspecified */
78		-#define is_addr_unspecified(a) \
79		- ((((a)->s6_addr32[0]) == 0) && \
80		- (((a)->s6_addr32[1]) == 0) && \
81		- (((a)->s6_addr32[2]) == 0) && \
82		- (((a)->s6_addr32[3]) == 0))
83		-
84		-/* compare ipv6 addresses prefixes */
85		-#define ipaddr_prefixcmp(addr1, addr2, length) \
86		- (memcmp(addr1, addr2, length >> 3) == 0)
87		-
88		-/* local link, i.e. FE80::/10 */
89		-#define is_addr_link_local(a) (((a)->s6_addr16[0]) == htons(0xFE80))
90		-
91		-/*
92		- * check whether we can compress the IID to 16 bits,
93		- * it's possible for unicast adresses with first 49 bits are zero only.
94		- */
95		-#define lowpan_is_iid_16_bit_compressable(a) \
96		- ((((a)->s6_addr16[4]) == 0) && \
97		- (((a)->s6_addr[10]) == 0) && \
98		- (((a)->s6_addr[11]) == 0xff) && \
99		- (((a)->s6_addr[12]) == 0xfe) && \
100		- (((a)->s6_addr[13]) == 0))
101		-
102		-/* multicast address */
103		-#define is_addr_mcast(a) (((a)->s6_addr[0]) == 0xFF)
104		-
105		-/* check whether the 112-bit gid of the multicast address is mappable to: */
106		-
107		-/* 9 bits, for FF02::1 (all nodes) and FF02::2 (all routers) addresses only. */
108		-#define lowpan_is_mcast_addr_compressable(a) \
109		- ((((a)->s6_addr16[1]) == 0) && \
110		- (((a)->s6_addr16[2]) == 0) && \
111		- (((a)->s6_addr16[3]) == 0) && \
112		- (((a)->s6_addr16[4]) == 0) && \
113		- (((a)->s6_addr16[5]) == 0) && \
114		- (((a)->s6_addr16[6]) == 0) && \
115		- (((a)->s6_addr[14]) == 0) && \
116		- ((((a)->s6_addr[15]) == 1) \|\| (((a)->s6_addr[15]) == 2)))
117		-
118		-/* 48 bits, FFXX::00XX:XXXX:XXXX */
119		-#define lowpan_is_mcast_addr_compressable48(a) \
120		- ((((a)->s6_addr16[1]) == 0) && \
121		- (((a)->s6_addr16[2]) == 0) && \
122		- (((a)->s6_addr16[3]) == 0) && \
123		- (((a)->s6_addr16[4]) == 0) && \
124		- (((a)->s6_addr[10]) == 0))
125		-
126		-/* 32 bits, FFXX::00XX:XXXX */
127		-#define lowpan_is_mcast_addr_compressable32(a) \
128		- ((((a)->s6_addr16[1]) == 0) && \
129		- (((a)->s6_addr16[2]) == 0) && \
130		- (((a)->s6_addr16[3]) == 0) && \
131		- (((a)->s6_addr16[4]) == 0) && \
132		- (((a)->s6_addr16[5]) == 0) && \
133		- (((a)->s6_addr[12]) == 0))
134		-
135		-/* 8 bits, FF02::00XX */
136		-#define lowpan_is_mcast_addr_compressable8(a) \
137		- ((((a)->s6_addr[1]) == 2) && \
138		- (((a)->s6_addr16[1]) == 0) && \
139		- (((a)->s6_addr16[2]) == 0) && \
140		- (((a)->s6_addr16[3]) == 0) && \
141		- (((a)->s6_addr16[4]) == 0) && \
142		- (((a)->s6_addr16[5]) == 0) && \
143		- (((a)->s6_addr16[6]) == 0) && \
144		- (((a)->s6_addr[14]) == 0))
145		-
146		-#define lowpan_is_addr_broadcast(a) \
147		- ((((a)[0]) == 0xFF) && \
148		- (((a)[1]) == 0xFF) && \
149		- (((a)[2]) == 0xFF) && \
150		- (((a)[3]) == 0xFF) && \
151		- (((a)[4]) == 0xFF) && \
152		- (((a)[5]) == 0xFF) && \
153		- (((a)[6]) == 0xFF) && \
154		- (((a)[7]) == 0xFF))
155		-
156		-#define LOWPAN_DISPATCH_IPV6 0x41 /* 01000001 = 65 */
157		-#define LOWPAN_DISPATCH_HC1 0x42 /* 01000010 = 66 */
158		-#define LOWPAN_DISPATCH_IPHC 0x60 /* 011xxxxx = ... */
159		-#define LOWPAN_DISPATCH_FRAG1 0xc0 /* 11000xxx */
160		-#define LOWPAN_DISPATCH_FRAGN 0xe0 /* 11100xxx */
161		-
162		-#define LOWPAN_DISPATCH_MASK 0xf8 /* 11111000 */
163		-
164		-#define LOWPAN_FRAG_TIMEOUT (HZ * 60) /* time-out 60 sec */
165		-
166		-#define LOWPAN_FRAG1_HEAD_SIZE 0x4
167		-#define LOWPAN_FRAGN_HEAD_SIZE 0x5
168		-
169		-/*
170		- * According IEEE802.15.4 standard:
171		- * - MTU is 127 octets
172		- * - maximum MHR size is 37 octets
173		- * - MFR size is 2 octets
174		- *
175		- * so minimal payload size that we may guarantee is:
176		- * MTU - MHR - MFR = 88 octets
177		- */
178		-#define LOWPAN_FRAG_SIZE 88
179		-
180		-/*
181		- * Values of fields within the IPHC encoding first byte
182		- * (C stands for compressed and I for inline)
183		- */
184		-#define LOWPAN_IPHC_TF 0x18
185		-
186		-#define LOWPAN_IPHC_FL_C 0x10
187		-#define LOWPAN_IPHC_TC_C 0x08
188		-#define LOWPAN_IPHC_NH_C 0x04
189		-#define LOWPAN_IPHC_TTL_1 0x01
190		-#define LOWPAN_IPHC_TTL_64 0x02
191		-#define LOWPAN_IPHC_TTL_255 0x03
192		-#define LOWPAN_IPHC_TTL_I 0x00
193		-
194		-
195		-/* Values of fields within the IPHC encoding second byte */
196		-#define LOWPAN_IPHC_CID 0x80
197		-
198		-#define LOWPAN_IPHC_ADDR_00 0x00
199		-#define LOWPAN_IPHC_ADDR_01 0x01
200		-#define LOWPAN_IPHC_ADDR_02 0x02
201		-#define LOWPAN_IPHC_ADDR_03 0x03
202		-
203		-#define LOWPAN_IPHC_SAC 0x40
204		-#define LOWPAN_IPHC_SAM 0x30
205		-
206		-#define LOWPAN_IPHC_SAM_BIT 4
207		-
208		-#define LOWPAN_IPHC_M 0x08
209		-#define LOWPAN_IPHC_DAC 0x04
210		-#define LOWPAN_IPHC_DAM_00 0x00
211		-#define LOWPAN_IPHC_DAM_01 0x01
212		-#define LOWPAN_IPHC_DAM_10 0x02
213		-#define LOWPAN_IPHC_DAM_11 0x03
214		-
215		-#define LOWPAN_IPHC_DAM_BIT 0
216		-/*
217		- * LOWPAN_UDP encoding (works together with IPHC)
218		- */
219		-#define LOWPAN_NHC_UDP_MASK 0xF8
220		-#define LOWPAN_NHC_UDP_ID 0xF0
221		-#define LOWPAN_NHC_UDP_CHECKSUMC 0x04
222		-#define LOWPAN_NHC_UDP_CHECKSUMI 0x00
223		-
224		-#define LOWPAN_NHC_UDP_4BIT_PORT 0xF0B0
225		-#define LOWPAN_NHC_UDP_4BIT_MASK 0xFFF0
226		-#define LOWPAN_NHC_UDP_8BIT_PORT 0xF000
227		-#define LOWPAN_NHC_UDP_8BIT_MASK 0xFF00
228		-
229		-/* values for port compression, _with checksum_ ie bit 5 set to 0 */
230		-#define LOWPAN_NHC_UDP_CS_P_00 0xF0 /* all inline */
231		-#define LOWPAN_NHC_UDP_CS_P_01 0xF1 /* source 16bit inline,
232		- dest = 0xF0 + 8 bit inline */
233		-#define LOWPAN_NHC_UDP_CS_P_10 0xF2 /* source = 0xF0 + 8bit inline,
234		- dest = 16 bit inline */
235		-#define LOWPAN_NHC_UDP_CS_P_11 0xF3 /* source & dest = 0xF0B + 4bit inline */
236		-#define LOWPAN_NHC_UDP_CS_C 0x04 /* checksum elided */
237		-
238		-#ifdef DEBUG
239		-/* print data in line */
240		-static inline void raw_dump_inline(const char caller, char msg,
241		- unsigned char *buf, int len)
242		-{
243		- if (msg)
244		- pr_debug("%s():%s: ", caller, msg);
245		-
246		- print_hex_dump_debug("", DUMP_PREFIX_NONE, 16, 1, buf, len, false);
247		-}
248		-
249		-/* print data in a table format:
250		- *
251		- * addr: xx xx xx xx xx xx
252		- * addr: xx xx xx xx xx xx
253		- * ...
254		- */
255		-static inline void raw_dump_table(const char caller, char msg,
256		- unsigned char *buf, int len)
257		-{
258		- if (msg)
259		- pr_debug("%s():%s:\n", caller, msg);
260		-
261		- print_hex_dump_debug("\t", DUMP_PREFIX_OFFSET, 16, 1, buf, len, false);
262		-}
263		-#else
264		-static inline void raw_dump_table(const char caller, char msg,
265		- unsigned char *buf, int len) { }
266		-static inline void raw_dump_inline(const char caller, char msg,
267		- unsigned char *buf, int len) { }
268		-#endif
269		-
270		-static inline int lowpan_fetch_skb_u8(struct sk_buff skb, u8 val)
271		-{
272		- if (unlikely(!pskb_may_pull(skb, 1)))
273		- return -EINVAL;
274		-
275		- *val = skb->data[0];
276		- skb_pull(skb, 1);
277		-
278		- return 0;
279		-}
280		-
281		-static inline int lowpan_fetch_skb_u16(struct sk_buff skb, u16 val)
282		-{
283		- if (unlikely(!pskb_may_pull(skb, 2)))
284		- return -EINVAL;
285		-
286		- *val = (skb->data[0] << 8) \| skb->data[1];
287		- skb_pull(skb, 2);
288		-
289		- return 0;
290		-}
291		-
292		-static inline bool lowpan_fetch_skb(struct sk_buff *skb,
293		- void *data, const unsigned int len)
294		-{
295		- if (unlikely(!pskb_may_pull(skb, len)))
296		- return true;
297		-
298		- skb_copy_from_linear_data(skb, data, len);
299		- skb_pull(skb, len);
300		-
301		- return false;
302		-}
303		-
304		-static inline void lowpan_push_hc_data(u8 *hc_ptr, const void data,
305		- const size_t len)
306		-{
307		- memcpy(*hc_ptr, data, len);
308		- *hc_ptr += len;
309		-}
310		-
311		-static inline u8 lowpan_addr_mode_size(const u8 addr_mode)
312		-{
313		- static const u8 addr_sizes[] = {
314		- [LOWPAN_IPHC_ADDR_00] = 16,
315		- [LOWPAN_IPHC_ADDR_01] = 8,
316		- [LOWPAN_IPHC_ADDR_02] = 2,
317		- [LOWPAN_IPHC_ADDR_03] = 0,
318		- };
319		- return addr_sizes[addr_mode];
320		-}
321		-
322		-static inline u8 lowpan_next_hdr_size(const u8 h_enc, u16 *uncomp_header)
323		-{
324		- u8 ret = 1;
325		-
326		- if ((h_enc & LOWPAN_NHC_UDP_MASK) == LOWPAN_NHC_UDP_ID) {
327		- *uncomp_header += sizeof(struct udphdr);
328		-
329		- switch (h_enc & LOWPAN_NHC_UDP_CS_P_11) {
330		- case LOWPAN_NHC_UDP_CS_P_00:
331		- ret += 4;
332		- break;
333		- case LOWPAN_NHC_UDP_CS_P_01:
334		- case LOWPAN_NHC_UDP_CS_P_10:
335		- ret += 3;
336		- break;
337		- case LOWPAN_NHC_UDP_CS_P_11:
338		- ret++;
339		- break;
340		- default:
341		- break;
342		- }
343		-
344		- if (!(h_enc & LOWPAN_NHC_UDP_CS_C))
345		- ret += 2;
346		- }
347		-
348		- return ret;
349		-}
350		-
351		-/**
352		- * lowpan_uncompress_size - returns skb->len size with uncompressed header
353		- * @skb: sk_buff with 6lowpan header inside
354		- * @datagram_offset: optional to get the datagram_offset value
355		- *
356		- * Returns the skb->len with uncompressed header
357		- */
358		-static inline u16
359		-lowpan_uncompress_size(const struct sk_buff skb, u16 dgram_offset)
360		-{
361		- u16 ret = 2, uncomp_header = sizeof(struct ipv6hdr);
362		- u8 iphc0, iphc1, h_enc;
363		-
364		- iphc0 = skb_network_header(skb)[0];
365		- iphc1 = skb_network_header(skb)[1];
366		-
367		- switch ((iphc0 & LOWPAN_IPHC_TF) >> 3) {
368		- case 0:
369		- ret += 4;
370		- break;
371		- case 1:
372		- ret += 3;
373		- break;
374		- case 2:
375		- ret++;
376		- break;
377		- default:
378		- break;
379		- }
380		-
381		- if (!(iphc0 & LOWPAN_IPHC_NH_C))
382		- ret++;
383		-
384		- if (!(iphc0 & 0x03))
385		- ret++;
386		-
387		- ret += lowpan_addr_mode_size((iphc1 & LOWPAN_IPHC_SAM) >>
388		- LOWPAN_IPHC_SAM_BIT);
389		-
390		- if (iphc1 & LOWPAN_IPHC_M) {
391		- switch ((iphc1 & LOWPAN_IPHC_DAM_11) >>
392		- LOWPAN_IPHC_DAM_BIT) {
393		- case LOWPAN_IPHC_DAM_00:
394		- ret += 16;
395		- break;
396		- case LOWPAN_IPHC_DAM_01:
397		- ret += 6;
398		- break;
399		- case LOWPAN_IPHC_DAM_10:
400		- ret += 4;
401		- break;
402		- case LOWPAN_IPHC_DAM_11:
403		- ret++;
404		- break;
405		- default:
406		- break;
407		- }
408		- } else {
409		- ret += lowpan_addr_mode_size((iphc1 & LOWPAN_IPHC_DAM_11) >>
410		- LOWPAN_IPHC_DAM_BIT);
411		- }
412		-
413		- if (iphc0 & LOWPAN_IPHC_NH_C) {
414		- h_enc = skb_network_header(skb)[ret];
415		- ret += lowpan_next_hdr_size(h_enc, &uncomp_header);
416		- }
417		-
418		- if (dgram_offset)
419		- *dgram_offset = uncomp_header;
420		-
421		- return skb->len + uncomp_header - ret;
422		-}
423		-
424		-typedef int (skb_delivery_cb)(struct sk_buff skb, struct net_device *dev);
425		-
426		-int lowpan_process_data(struct sk_buff skb, struct net_device dev,
427		- const u8 *saddr, const u8 saddr_type, const u8 saddr_len,
428		- const u8 *daddr, const u8 daddr_type, const u8 daddr_len,
429		- u8 iphc0, u8 iphc1, skb_delivery_cb skb_deliver);
430		-int lowpan_header_compress(struct sk_buff skb, struct net_device dev,
431		- unsigned short type, const void *_daddr,
432		- const void *_saddr, unsigned int len);
433		-
434		-#endif /* __6LOWPAN_H__ */
...	...	@@ -54,10 +54,9 @@
54	54	#include <linux/if_arp.h>
55	55	#include <linux/module.h>
56	56	#include <linux/netdevice.h>
	57	+#include <net/6lowpan.h>
57	58	#include <net/ipv6.h>
58	59	#include <net/af_ieee802154.h>
59		-
60		-#include "6lowpan.h"
61	60
62	61	/*
63	62	* Uncompress address function for source and
...	...	@@ -52,10 +52,10 @@
52	52	#include <net/af_ieee802154.h>
53	53	#include <net/ieee802154.h>
54	54	#include <net/ieee802154_netdev.h>
	55	+#include <net/6lowpan.h>
55	56	#include <net/ipv6.h>
56	57
57	58	#include "reassembly.h"
58		-#include "6lowpan.h"
59	59
60	60	static LIST_HEAD(lowpan_devices);
61	61
...	...	@@ -24,10 +24,10 @@
24	24	#include <linux/export.h>
25	25
26	26	#include <net/ieee802154_netdev.h>
	27	+#include <net/6lowpan.h>
27	28	#include <net/ipv6.h>
28	29	#include <net/inet_frag.h>
29	30
30		-#include "6lowpan.h"
31	31	#include "reassembly.h"
32	32
33	33	static struct inet_frags lowpan_frags;