Data Structures
struct	sicslowpan_addr_context
	The header for fragments. More...

struct	sicslowpan_nh_compressor
	The structure of a next header compressor. More...

Files
file	sicslowpan.c
	6lowpan implementation (RFC4944 and draft-ietf-6lowpan-hc-06)

file	sicslowpan.h
	Header file for the 6lowpan implementation (RFC4944 and draft-hui-6lowpan-hc-01)

Macros
#define	_DEBUG_ DEBUG_NONE
	FOR HC-06 COMPLIANCE TODO: -Add compression options to UDP, currently only supports both ports compressed or both ports elided. More...

#define	COMPRESSION_THRESHOLD 0
	Some MAC layers need a minimum payload, which is configurable through the SICSLOWPAN_CONF_MIN_MAC_PAYLOAD option. More...

#define	FRAG_IN_DEBUG DEBUG_NONE

#define	FRAG_OUT_DEBUG DEBUG_NONE

#define	GET16(ptr, index) (((uint16_t)((ptr)[index] << 8)) \| ((ptr)[(index) + 1]))

#define	MAC_MAX_PAYLOAD 102
	Size of the 802.15.4 payload (127byte - 25 for MAC header) More...

#define	PRINTF(...)

#define	PRINTFI(...)

#define	PRINTFO(...)

#define	PRINTPACKETBUF()

#define	PRINTSICSLOWPANBUF()

#define	PRINTUIPBUF()

#define	SET16(ptr, index, value)

#define	sicslowpan_buf uip_buf
	The buffer used for the 6lowpan processing is uip_buf. More...

#define	SICSLOWPAN_COMPRESSION SICSLOWPAN_COMPRESSION_IPV6

#define	sicslowpan_len uip_len

#define	SICSLOWPAN_MAX_MAC_TRANSMISSIONS 4

#define	SICSLOWPAN_NHC_EXT_HDR 0xE0

#define	SICSLOWPAN_NHC_MASK 0xF0

#define	UIP_LOG(m)

#define	USE_FRAMER_HDRLEN 1

Functions
static void	input (void)
	Process a received 6lowpan packet. More...

void	rime_sniffer_add (struct rime_sniffer *s)

void	rime_sniffer_remove (struct rime_sniffer *s)

static void	set_packet_attrs (void)

int	sicslowpan_get_last_rssi (void)

void	sicslowpan_init (void)

Variables
static struct rime_sniffer *	callback = NULL

static int	last_rssi

Pointers in the packetbuf buffer
#define	PACKETBUF_FRAG_PTR (packetbuf_ptr)

#define	PACKETBUF_FRAG_DISPATCH_SIZE 0 /* 16 bit */

#define	PACKETBUF_FRAG_TAG 2 /* 16 bit */

#define	PACKETBUF_FRAG_OFFSET 4 /* 8 bit */

#define	PACKETBUF_HC1_DISPATCH 0 /* 8 bit */

#define	PACKETBUF_HC1_ENCODING 1 /* 8 bit */

#define	PACKETBUF_HC1_TTL 2 /* 8 bit */

#define	PACKETBUF_HC1_HC_UDP_DISPATCH 0 /* 8 bit */

#define	PACKETBUF_HC1_HC_UDP_HC1_ENCODING 1 /* 8 bit */

#define	PACKETBUF_HC1_HC_UDP_UDP_ENCODING 2 /* 8 bit */

#define	PACKETBUF_HC1_HC_UDP_TTL 3 /* 8 bit */

#define	PACKETBUF_HC1_HC_UDP_PORTS 4 /* 8 bit */

#define	PACKETBUF_HC1_HC_UDP_CHKSUM 5 /* 16 bit */

Pointers in the sicslowpan and uip buffer
#define	SICSLOWPAN_IP_BUF ((struct uip_ip_hdr *)&sicslowpan_buf[UIP_LLH_LEN])

#define	SICSLOWPAN_UDP_BUF ((struct uip_udp_hdr *)&sicslowpan_buf[UIP_LLIPH_LEN])

#define	UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])

#define	UIP_UDP_BUF ((struct uip_udp_hdr *)&uip_buf[UIP_LLIPH_LEN])

#define	UIP_TCP_BUF ((struct uip_tcp_hdr *)&uip_buf[UIP_LLIPH_LEN])

#define	UIP_ICMP_BUF ((struct uip_icmp_hdr *)&uip_buf[UIP_LLIPH_LEN])

General variables
static uint8_t *	packetbuf_ptr
	A pointer to the packetbuf buffer. More...

static uint8_t	uncomp_hdr_len
	uncomp_hdr_len is the length of the headers before compression (if HC2 is used this includes the UDP header in addition to the IP header). More...

static int	last_tx_status
	the result of the last transmitted fragment More...

HC06 specific variables
static struct sicslowpan_addr_context *	context
	Addresses contexts for IPHC. More...

static uint8_t *	hc06_ptr
	pointer to the byte where to write next inline field. More...

const uint8_t	unc_llconf [] = {0x0f,0x28,0x22,0x20}

const uint8_t	unc_ctxconf [] = {0x00,0x88,0x82,0x80}

const uint8_t	unc_mxconf [] = {0x0f, 0x25, 0x23, 0x21}

const uint8_t	llprefix [] = {0xfe, 0x80}

static const uint8_t	ttl_values [] = {0, 1, 64, 255}

HC06 related functions
static struct sicslowpan_addr_context *	addr_context_lookup_by_prefix (uip_ipaddr_t *ipaddr)
	find the context corresponding to prefix ipaddr More...

static struct sicslowpan_addr_context *	addr_context_lookup_by_number (uint8_t number)
	find the context with the given number More...

static uint8_t	compress_addr_64 (uint8_t bitpos, uip_ipaddr_t ipaddr, uip_lladdr_t lladdr)

static void	uncompress_addr (uip_ipaddr_t ipaddr, uint8_t const prefix[], uint8_t pref_post_count, uip_lladdr_t lladdr)

static void	compress_hdr_hc06 (linkaddr_t link_destaddr, uint8_t tx_hdr_len)
	Compress IP/UDP header. More...

static void	uncompress_hdr_hc06 (uint16_t ip_len, uint8_t uip_buff, uint8_t rx_hdr_len)
	Uncompress HC06 (i.e., IPHC and LOWPAN_UDP) headers and put them in sicslowpan_buf. More...

HC1 compression and uncompression functions
static void	compress_hdr_hc1 (linkaddr_t link_destaddr, uint8_t tx_hdr_len)
	Compress IP/UDP header using HC1 and HC_UDP. More...

static void	uncompress_hdr_hc1 (uint16_t ip_len, uint8_t uip_buff, uint8_t *rx_hdr_len)
	Uncompress HC1 (and HC_UDP) headers and put them in sicslowpan_buf. More...

IPv6 dispatch "compression" function
static void	compress_hdr_ipv6 (linkaddr_t link_destaddr, uint8_t tx_hdr_len)

Input/output functions common to all compression schemes
static void	packet_sent (void *ptr, int status, int transmissions)
	Callback function for the MAC packet sent callback. More...

static void	send_packet (linkaddr_t *dest)
	This function is called by the 6lowpan code to send out a packet. More...

static uint8_t	output (const uip_lladdr_t *localdest)
	Take an IP packet and format it to be sent on an 802.15.4 network using 6lowpan. More...

General sicslowpan defines
#define	SICSLOWPAN_UDP_4_BIT_PORT_MIN 0xF0B0

#define	SICSLOWPAN_UDP_4_BIT_PORT_MAX 0xF0BF /* F0B0 + 15 */

#define	SICSLOWPAN_UDP_8_BIT_PORT_MIN 0xF000

#define	SICSLOWPAN_UDP_8_BIT_PORT_MAX 0xF0FF /* F000 + 255 */

6lowpan compressions
#define	SICSLOWPAN_COMPRESSION_IPV6 0

#define	SICSLOWPAN_COMPRESSION_HC1 1

#define	SICSLOWPAN_COMPRESSION_HC06 2

6lowpan dispatches
#define	SICSLOWPAN_DISPATCH_NALP 0x00 /* 00xxxxxx */

#define	SICSLOWPAN_DISPATCH_IPV6 0x41 /* 01000001 = 65 */

#define	SICSLOWPAN_DISPATCH_HC1 0x42 /* 01000010 = 66 */

#define	SICSLOWPAN_DISPATCH_IPHC 0x60 /* 011xxxxx = ... */

#define	SICSLOWPAN_DISPATCH_FRAG1 0xc0 /* 11000xxx */

#define	SICSLOWPAN_DISPATCH_FRAGN 0xe0 /* 11100xxx */

HC1 encoding
#define	SICSLOWPAN_HC1_NH_UDP 0x02

#define	SICSLOWPAN_HC1_NH_TCP 0x06

#define	SICSLOWPAN_HC1_NH_ICMP6 0x04

HC_UDP encoding (works together with HC1)
#define	SICSLOWPAN_HC_UDP_ALL_C 0xE0

IPHC encoding
#define	SICSLOWPAN_IPHC_FL_C 0x10

#define	SICSLOWPAN_IPHC_TC_C 0x08

#define	SICSLOWPAN_IPHC_NH_C 0x04

#define	SICSLOWPAN_IPHC_TTL_1 0x01

#define	SICSLOWPAN_IPHC_TTL_64 0x02

#define	SICSLOWPAN_IPHC_TTL_255 0x03

#define	SICSLOWPAN_IPHC_TTL_I 0x00

#define	SICSLOWPAN_IPHC_CID 0x80

#define	SICSLOWPAN_IPHC_SAC 0x40

#define	SICSLOWPAN_IPHC_SAM_00 0x00

#define	SICSLOWPAN_IPHC_SAM_01 0x10

#define	SICSLOWPAN_IPHC_SAM_10 0x20

#define	SICSLOWPAN_IPHC_SAM_11 0x30

#define	SICSLOWPAN_IPHC_SAM_BIT 4

#define	SICSLOWPAN_IPHC_M 0x08

#define	SICSLOWPAN_IPHC_DAC 0x04

#define	SICSLOWPAN_IPHC_DAM_00 0x00

#define	SICSLOWPAN_IPHC_DAM_01 0x01

#define	SICSLOWPAN_IPHC_DAM_10 0x02

#define	SICSLOWPAN_IPHC_DAM_11 0x03

#define	SICSLOWPAN_IPHC_DAM_BIT 0

#define	SICSLOWPAN_IPHC_ADDR_CONTEXT_LL 0

#define	SICSLOWPAN_IPHC_MCAST_RANGE 0xA0

LOWPAN_UDP encoding (works together with IPHC)
#define	SICSLOWPAN_NHC_UDP_MASK 0xF8

#define	SICSLOWPAN_NHC_UDP_ID 0xF0

#define	SICSLOWPAN_NHC_UDP_CHECKSUMC 0x04

#define	SICSLOWPAN_NHC_UDP_CHECKSUMI 0x00

#define	SICSLOWPAN_NHC_UDP_CS_P_00 0xF0 /* all inline */

#define	SICSLOWPAN_NHC_UDP_CS_P_01 0xF1 /* source 16bit inline, dest = 0xF0 + 8 bit inline */

#define	SICSLOWPAN_NHC_UDP_CS_P_10 0xF2 /* source = 0xF0 + 8bit inline, dest = 16 bit inline */

#define	SICSLOWPAN_NHC_UDP_CS_P_11 0xF3 /* source & dest = 0xF0B + 4bit inline */

The 6lowpan "headers" length
#define	SICSLOWPAN_IPV6_HDR_LEN 1 /one byte/

#define	SICSLOWPAN_HC1_HDR_LEN 3

#define	SICSLOWPAN_HC1_HC_UDP_HDR_LEN 7

#define	SICSLOWPAN_FRAG1_HDR_LEN 4

#define	SICSLOWPAN_FRAGN_HDR_LEN 5

Address compressibility test functions
#define	sicslowpan_is_iid_16_bit_compressable(a)
	check whether we can compress the IID in address 'a' to 16 bits. More...

#define	sicslowpan_is_mcast_addr_decompressable(a)
	check whether the 9-bit group-id of the compressed multicast address is known. More...

#define	sicslowpan_is_mcast_addr_compressable(a)
	check whether the 112-bit group-id of the multicast address is mappable to a 9-bit group-id It is true if the group is the all nodes or all routers group. More...

#define	sicslowpan_is_mcast_addr_compressable48(a)

#define	sicslowpan_is_mcast_addr_compressable32(a)

#define	sicslowpan_is_mcast_addr_compressable8(a)

#define _DEBUG_ DEBUG_NONE

FOR HC-06 COMPLIANCE TODO: -Add compression options to UDP, currently only supports both ports compressed or both ports elided.

-Verify TC/FL compression works

-Add stateless multicast option

#define COMPRESSION_THRESHOLD 0

Some MAC layers need a minimum payload, which is configurable through the SICSLOWPAN_CONF_MIN_MAC_PAYLOAD option.

Referenced by output().

#define FRAG_IN_DEBUG DEBUG_NONE

#define FRAG_OUT_DEBUG DEBUG_NONE

#define GET16	(	ptr,
		index
	)	(((uint16_t)((ptr)[index] << 8)) \| ((ptr)[(index) + 1]))

Referenced by input().

#define MAC_MAX_PAYLOAD 102

Size of the 802.15.4 payload (127byte - 25 for MAC header)

Referenced by output().

#define PACKETBUF_FRAG_DISPATCH_SIZE 0 /* 16 bit */

Referenced by input(), and output().

#define PACKETBUF_FRAG_OFFSET 4 /* 8 bit */

Referenced by input(), and output().

#define PACKETBUF_FRAG_PTR (packetbuf_ptr)

Referenced by input(), and output().

#define PACKETBUF_FRAG_TAG 2 /* 16 bit */

Referenced by input(), and output().

#define PACKETBUF_HC1_DISPATCH 0 /* 8 bit */

Referenced by compress_hdr_hc1(), and input().

#define PACKETBUF_HC1_ENCODING 1 /* 8 bit */

Referenced by compress_hdr_hc1(), and uncompress_hdr_hc1().

#define PACKETBUF_HC1_HC_UDP_CHKSUM 5 /* 16 bit */

Referenced by compress_hdr_hc1(), and uncompress_hdr_hc1().

#define PACKETBUF_HC1_HC_UDP_DISPATCH 0 /* 8 bit */

#define PACKETBUF_HC1_HC_UDP_HC1_ENCODING 1 /* 8 bit */

Referenced by compress_hdr_hc1(), and uncompress_hdr_hc1().

#define PACKETBUF_HC1_HC_UDP_PORTS 4 /* 8 bit */

Referenced by compress_hdr_hc1(), and uncompress_hdr_hc1().

#define PACKETBUF_HC1_HC_UDP_TTL 3 /* 8 bit */

Referenced by compress_hdr_hc1(), and uncompress_hdr_hc1().

#define PACKETBUF_HC1_HC_UDP_UDP_ENCODING 2 /* 8 bit */

Referenced by compress_hdr_hc1(), and uncompress_hdr_hc1().

#define PACKETBUF_HC1_TTL 2 /* 8 bit */

Referenced by compress_hdr_hc1(), and uncompress_hdr_hc1().

#define PRINTF ( ... )

Referenced by compress_hdr_hc06(), compress_hdr_hc1(), input(), packet_sent(), uncompress_addr(), uncompress_hdr_hc06(), and uncompress_hdr_hc1().

#define PRINTFI ( ... )

Referenced by input().

#define PRINTFO ( ... )

Referenced by output().

#define PRINTPACKETBUF ( )

#define PRINTSICSLOWPANBUF ( )

#define PRINTUIPBUF ( )

#define SET16	(	ptr,
		index,
		value
	)

Value:

do {     \
  (ptr)[index] = ((value) >> 8) & 0xff; \
  (ptr)[index + 1] = (value) & 0xff;    \
} while(0)

Referenced by output().

#define sicslowpan_buf uip_buf

The buffer used for the 6lowpan processing is uip_buf.

We do not use any additional buffer.

Referenced by input(), and uncompress_hdr_hc06().

#define SICSLOWPAN_COMPRESSION SICSLOWPAN_COMPRESSION_IPV6

#define SICSLOWPAN_COMPRESSION_HC06 2

#define SICSLOWPAN_COMPRESSION_HC1 1

#define SICSLOWPAN_COMPRESSION_IPV6 0

#define SICSLOWPAN_DISPATCH_FRAG1 0xc0 /* 11000xxx */

Referenced by input(), and output().

#define SICSLOWPAN_DISPATCH_FRAGN 0xe0 /* 11100xxx */

Referenced by input(), and output().

#define SICSLOWPAN_DISPATCH_HC1 0x42 /* 01000010 = 66 */

Referenced by compress_hdr_hc1(), and input().

#define SICSLOWPAN_DISPATCH_IPHC 0x60 /* 011xxxxx = ... */

Referenced by compress_hdr_hc06(), and input().

#define SICSLOWPAN_DISPATCH_IPV6 0x41 /* 01000001 = 65 */

Referenced by compress_hdr_hc1(), compress_hdr_ipv6(), and input().

#define SICSLOWPAN_DISPATCH_NALP 0x00 /* 00xxxxxx */

#define SICSLOWPAN_FRAG1_HDR_LEN 4

Referenced by input(), and output().

#define SICSLOWPAN_FRAGN_HDR_LEN 5

Referenced by input(), and output().

#define SICSLOWPAN_HC1_HC_UDP_HDR_LEN 7

Referenced by compress_hdr_hc1(), and uncompress_hdr_hc1().

#define SICSLOWPAN_HC1_HDR_LEN 3

Referenced by compress_hdr_hc1(), and uncompress_hdr_hc1().

#define SICSLOWPAN_HC1_NH_ICMP6 0x04

Referenced by uncompress_hdr_hc1().

#define SICSLOWPAN_HC1_NH_TCP 0x06

Referenced by uncompress_hdr_hc1().

#define SICSLOWPAN_HC1_NH_UDP 0x02

Referenced by uncompress_hdr_hc1().

#define SICSLOWPAN_HC_UDP_ALL_C 0xE0

Referenced by uncompress_hdr_hc1().

#define SICSLOWPAN_IP_BUF ((struct uip_ip_hdr *)&sicslowpan_buf[UIP_LLH_LEN])

Referenced by input(), and uncompress_hdr_hc06().

#define SICSLOWPAN_IPHC_ADDR_CONTEXT_LL 0

#define SICSLOWPAN_IPHC_CID 0x80

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_IPHC_DAC 0x04

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_IPHC_DAM_00 0x00

Referenced by compress_hdr_hc06().

#define SICSLOWPAN_IPHC_DAM_01 0x01

Referenced by compress_hdr_hc06().

#define SICSLOWPAN_IPHC_DAM_10 0x02

Referenced by compress_hdr_hc06().

#define SICSLOWPAN_IPHC_DAM_11 0x03

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_IPHC_DAM_BIT 0

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_IPHC_FL_C 0x10

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_IPHC_M 0x08

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_IPHC_MCAST_RANGE 0xA0

#define SICSLOWPAN_IPHC_NH_C 0x04

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_IPHC_SAC 0x40

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_IPHC_SAM_00 0x00

Referenced by compress_hdr_hc06().

#define SICSLOWPAN_IPHC_SAM_01 0x10

#define SICSLOWPAN_IPHC_SAM_10 0x20

#define SICSLOWPAN_IPHC_SAM_11 0x30

Referenced by uncompress_hdr_hc06().

#define SICSLOWPAN_IPHC_SAM_BIT 4

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_IPHC_TC_C 0x08

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_IPHC_TTL_1 0x01

Referenced by compress_hdr_hc06().

#define SICSLOWPAN_IPHC_TTL_255 0x03

Referenced by compress_hdr_hc06().

#define SICSLOWPAN_IPHC_TTL_64 0x02

Referenced by compress_hdr_hc06().

#define SICSLOWPAN_IPHC_TTL_I 0x00

Referenced by uncompress_hdr_hc06().

#define SICSLOWPAN_IPV6_HDR_LEN 1 /*one byte*/

Referenced by compress_hdr_hc1(), compress_hdr_ipv6(), and input().

#define sicslowpan_is_iid_16_bit_compressable ( a )

Value:

((((a)->u16[4]) == 0) &&                       \
   (((a)->u8[10]) == 0)&&               \
   (((a)->u8[11]) == 0xff)&&                \
   (((a)->u8[12]) == 0xfe)&&                \
   (((a)->u8[13]) == 0))

check whether we can compress the IID in address 'a' to 16 bits.

This is used for unicast addresses only, and is true if the address is on the format <PREFIX>::0000:00ff:fe00:XXXX NOTE: we currently assume 64-bits prefixes

Referenced by compress_addr_64().

#define sicslowpan_is_mcast_addr_compressable ( a )

Value:

((((a)->u16[1]) == 0) &&                       \
   (((a)->u16[2]) == 0) &&                       \
   (((a)->u16[3]) == 0) &&                       \
   (((a)->u16[4]) == 0) &&                       \
   (((a)->u16[5]) == 0) &&                       \
   (((a)->u16[6]) == 0) &&                       \
   (((a)->u8[14]) == 0) &&                       \
   ((((a)->u8[15]) == 1) || (((a)->u8[15]) == 2)))

check whether the 112-bit group-id of the multicast address is mappable to a 9-bit group-id It is true if the group is the all nodes or all routers group.

#define sicslowpan_is_mcast_addr_compressable32 ( a )

Value:

((((a)->u16[1]) == 0) &&                       \
   (((a)->u16[2]) == 0) &&                       \
   (((a)->u16[3]) == 0) &&                       \
   (((a)->u16[4]) == 0) &&                       \
   (((a)->u16[5]) == 0) &&                       \
   (((a)->u8[12]) == 0))

Referenced by compress_hdr_hc06().

#define sicslowpan_is_mcast_addr_compressable48 ( a )

Value:

((((a)->u16[1]) == 0) &&                       \
   (((a)->u16[2]) == 0) &&                       \
   (((a)->u16[3]) == 0) &&                       \
   (((a)->u16[4]) == 0) &&                       \
   (((a)->u8[10]) == 0))

Referenced by compress_hdr_hc06().

#define sicslowpan_is_mcast_addr_compressable8 ( a )

Value:

((((a)->u8[1]) == 2) &&                        \
   (((a)->u16[1]) == 0) &&                       \
   (((a)->u16[2]) == 0) &&                       \
   (((a)->u16[3]) == 0) &&                       \
   (((a)->u16[4]) == 0) &&                       \
   (((a)->u16[5]) == 0) &&                       \
   (((a)->u16[6]) == 0) &&                       \
   (((a)->u8[14]) == 0))

Referenced by compress_hdr_hc06().

#define sicslowpan_is_mcast_addr_decompressable ( a )

Value:

(((*a & 0x01) == 0) && \

((*(a + 1) == 0x01) || (*(a + 1) == 0x02)))

check whether the 9-bit group-id of the compressed multicast address is known.

It is true if the 9-bit group is the all nodes or all routers group.

Parameters

a	is typed uint8_t *

#define sicslowpan_len uip_len

Referenced by input().

#define SICSLOWPAN_MAX_MAC_TRANSMISSIONS 4

Referenced by output().

#define SICSLOWPAN_NHC_EXT_HDR 0xE0

#define SICSLOWPAN_NHC_MASK 0xF0

#define SICSLOWPAN_NHC_UDP_CHECKSUMC 0x04

Referenced by uncompress_hdr_hc06().

#define SICSLOWPAN_NHC_UDP_CHECKSUMI 0x00

#define SICSLOWPAN_NHC_UDP_CS_P_00 0xF0 /* all inline */

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_NHC_UDP_CS_P_01 0xF1 /* source 16bit inline, dest = 0xF0 + 8 bit inline */

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_NHC_UDP_CS_P_10 0xF2 /* source = 0xF0 + 8bit inline, dest = 16 bit inline */

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_NHC_UDP_CS_P_11 0xF3 /* source & dest = 0xF0B + 4bit inline */

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_NHC_UDP_ID 0xF0

Referenced by uncompress_hdr_hc06().

#define SICSLOWPAN_NHC_UDP_MASK 0xF8

Referenced by uncompress_hdr_hc06().

#define SICSLOWPAN_UDP_4_BIT_PORT_MAX 0xF0BF /* F0B0 + 15 */

#define SICSLOWPAN_UDP_4_BIT_PORT_MIN 0xF0B0

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_UDP_8_BIT_PORT_MAX 0xF0FF /* F000 + 255 */

#define SICSLOWPAN_UDP_8_BIT_PORT_MIN 0xF000

Referenced by compress_hdr_hc06(), and uncompress_hdr_hc06().

#define SICSLOWPAN_UDP_BUF ((struct uip_udp_hdr *)&sicslowpan_buf[UIP_LLIPH_LEN])

#define UIP_ICMP_BUF ((struct uip_icmp_hdr *)&uip_buf[UIP_LLIPH_LEN])

Referenced by set_packet_attrs().

#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])

Referenced by compress_hdr_hc06(), compress_hdr_hc1(), compress_hdr_ipv6(), input(), output(), and set_packet_attrs().

#define UIP_LOG ( m )

#define UIP_TCP_BUF ((struct uip_tcp_hdr *)&uip_buf[UIP_LLIPH_LEN])

Referenced by output(), and set_packet_attrs().

#define UIP_UDP_BUF ((struct uip_udp_hdr *)&uip_buf[UIP_LLIPH_LEN])

Referenced by compress_hdr_hc06(), compress_hdr_hc1(), and set_packet_attrs().

#define USE_FRAMER_HDRLEN 1

static struct sicslowpan_addr_context* addr_context_lookup_by_number ( uint8_t number )

static

find the context with the given number

References i, NULL, SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS, and sicslowpan_addr_context::used.

Referenced by uncompress_hdr_hc06().

static struct sicslowpan_addr_context* addr_context_lookup_by_prefix ( uip_ipaddr_t * ipaddr )

static

find the context corresponding to prefix ipaddr

References i, NULL, prefix, SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS, uip_ipaddr_prefixcmp, and sicslowpan_addr_context::used.

Referenced by compress_hdr_hc06().

static uint8_t compress_addr_64	(	uint8_t	bitpos,
		uip_ipaddr_t *	ipaddr,
		uip_lladdr_t *	lladdr
	)

static

References sicslowpan_is_iid_16_bit_compressable, uip_ip6addr_t::u16, and uip_is_addr_mac_addr_based.

Referenced by compress_hdr_hc06().

static void compress_hdr_hc06	(	linkaddr_t *	link_destaddr,
		uint8_t *	tx_hdr_len
	)

static

Compress IP/UDP header.

This function is called by the 6lowpan code to create a compressed 6lowpan packet in the packetbuf buffer from a full IPv6 packet in the uip_buf buffer.

HC-06 (draft-ietf-6lowpan-hc, version 6)
http://tools.ietf.org/html/draft-ietf-6lowpan-hc-06

Note: We do not support ISA100_UDP header compression

For LOWPAN_UDP compression, we either compress both ports or none. General format with LOWPAN_UDP compression is

*                      1                   2                   3
*  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |0|1|1|TF |N|HLI|C|S|SAM|M|D|DAM| SCI   | DCI   | comp. IPv6 hdr|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | compressed IPv6 fields .....                                  |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | LOWPAN_UDP    | non compressed UDP fields ...                 |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | L4 data ...                                                   |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*

Note: The context number 00 is reserved for the link local prefix. For unicast addresses, if we cannot compress the prefix, we neither compress the IID.

Parameters

link_destaddr L2 destination address, needed to compress IP dest

References addr_context_lookup_by_prefix(), compress_addr_64(), data, NULL, sicslowpan_addr_context::number, packetbuf_ptr, PRINTF, SICSLOWPAN_DISPATCH_IPHC, SICSLOWPAN_IPHC_CID, SICSLOWPAN_IPHC_DAC, SICSLOWPAN_IPHC_DAM_00, SICSLOWPAN_IPHC_DAM_01, SICSLOWPAN_IPHC_DAM_10, SICSLOWPAN_IPHC_DAM_11, SICSLOWPAN_IPHC_DAM_BIT, SICSLOWPAN_IPHC_FL_C, SICSLOWPAN_IPHC_M, SICSLOWPAN_IPHC_NH_C, SICSLOWPAN_IPHC_SAC, SICSLOWPAN_IPHC_SAM_00, SICSLOWPAN_IPHC_SAM_BIT, SICSLOWPAN_IPHC_TC_C, SICSLOWPAN_IPHC_TTL_1, SICSLOWPAN_IPHC_TTL_255, SICSLOWPAN_IPHC_TTL_64, sicslowpan_is_mcast_addr_compressable32, sicslowpan_is_mcast_addr_compressable48, sicslowpan_is_mcast_addr_compressable8, SICSLOWPAN_NHC_UDP_CS_P_00, SICSLOWPAN_NHC_UDP_CS_P_01, SICSLOWPAN_NHC_UDP_CS_P_10, SICSLOWPAN_NHC_UDP_CS_P_11, SICSLOWPAN_UDP_4_BIT_PORT_MIN, SICSLOWPAN_UDP_8_BIT_PORT_MIN, UIP_HTONS, UIP_IP_BUF, UIP_IPH_LEN, uip_is_addr_link_local, uip_is_addr_mcast, uip_is_addr_unspecified, uip_lladdr, UIP_PROTO_UDP, UIP_UDP_BUF, UIP_UDPH_LEN, and uncomp_hdr_len.

Referenced by output().

static void compress_hdr_hc1	(	linkaddr_t *	link_destaddr,
		uint8_t *	tx_hdr_len
	)

static

Compress IP/UDP header using HC1 and HC_UDP.

This function is called by the 6lowpan code to create a compressed 6lowpan packet in the packetbuf buffer from a full IPv6 packet in the uip_buf buffer.

If we can compress everything, we use HC1 dispatch, if not we use IPv6 dispatch.
We can compress everything if:

IP version is
Flow label and traffic class are 0
Both src and dest ip addresses are link local
Both src and dest interface ID are recoverable from lower layer header
Next header is either ICMP, UDP or TCP Moreover, if next header is UDP, we try to compress it using HC_UDP. This is feasible is both ports are between F0B0 and F0B0 + 15

Resulting header structure:

For ICMP, TCP, non compressed UDP
HC1 encoding = 11111010 (UDP) 11111110 (TCP) 11111100 (ICMP)

*                      1                   2                   3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | LoWPAN HC1 Dsp | HC1 encoding  | IPv6 Hop limit| L4 hdr + data|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | ...
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*

For compressed UDP HC1 encoding = 11111011, HC_UDP encoding = 11100000

*                      1                   2                   3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | LoWPAN HC1 Dsp| HC1 encoding  |  HC_UDP encod.| IPv6 Hop limit|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | src p.| dst p.| UDP checksum                  | L4 data...
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*

Parameters

link_destaddr L2 destination address, needed to compress the IP destination field

References PACKETBUF_HC1_DISPATCH, PACKETBUF_HC1_ENCODING, PACKETBUF_HC1_HC_UDP_CHKSUM, PACKETBUF_HC1_HC_UDP_HC1_ENCODING, PACKETBUF_HC1_HC_UDP_PORTS, PACKETBUF_HC1_HC_UDP_TTL, PACKETBUF_HC1_HC_UDP_UDP_ENCODING, PACKETBUF_HC1_TTL, packetbuf_ptr, PRINTF, SICSLOWPAN_DISPATCH_HC1, SICSLOWPAN_DISPATCH_IPV6, SICSLOWPAN_HC1_HC_UDP_HDR_LEN, SICSLOWPAN_HC1_HDR_LEN, SICSLOWPAN_IPV6_HDR_LEN, UIP_HTONS, UIP_IP_BUF, UIP_IPH_LEN, uip_is_addr_link_local, uip_is_addr_mac_addr_based, uip_lladdr, UIP_PROTO_ICMP6, UIP_PROTO_TCP, UIP_PROTO_UDP, UIP_UDP_BUF, UIP_UDPH_LEN, and uncomp_hdr_len.

Referenced by output().

static void compress_hdr_ipv6	(	linkaddr_t *	link_destaddr,
		uint8_t *	tx_hdr_len
	)

static

References packetbuf_ptr, SICSLOWPAN_DISPATCH_IPV6, SICSLOWPAN_IPV6_HDR_LEN, UIP_IP_BUF, UIP_IPH_LEN, and uncomp_hdr_len.

Referenced by output().

static void input ( void )

static

Process a received 6lowpan packet.

Parameters

r	The MAC layer

The 6lowpan packet is put in packetbuf by the MAC. If its a frag1 or a non-fragmented packet we first uncompress the IP header. The 6lowpan payload and possibly the uncompressed IP header are then copied in siclowpan_buf. If the IP packet is complete it is copied to uip_buf and the IP layer is called.

Note: We do not check for overlapping sicslowpan fragments (it is a SHALL in the RFC 4944 and should never happen)

References data, GET16, i, rime_sniffer::input_callback, linkaddr_copy(), LINKADDR_SIZE, packetbuf_addr(), PACKETBUF_ADDR_SENDER, packetbuf_attr(), PACKETBUF_ATTR_RSSI, packetbuf_datalen(), packetbuf_dataptr(), PACKETBUF_FRAG_DISPATCH_SIZE, PACKETBUF_FRAG_OFFSET, PACKETBUF_FRAG_PTR, PACKETBUF_FRAG_TAG, PACKETBUF_HC1_DISPATCH, packetbuf_ptr, printf, PRINTF, PRINTFI, RIMESTATS_ADD, set_packet_attrs(), sicslowpan_buf, SICSLOWPAN_DISPATCH_FRAG1, SICSLOWPAN_DISPATCH_FRAGN, SICSLOWPAN_DISPATCH_HC1, SICSLOWPAN_DISPATCH_IPHC, SICSLOWPAN_DISPATCH_IPV6, SICSLOWPAN_FRAG1_HDR_LEN, SICSLOWPAN_FRAGN_HDR_LEN, SICSLOWPAN_IP_BUF, SICSLOWPAN_IPV6_HDR_LEN, sicslowpan_len, tcpip_input(), timer_expired(), timer_set(), linkaddr_t::u8, uip_buf_t::u8, UIP_IP_BUF, UIP_IPH_LEN, uip_len, UIP_LLH_LEN, uncomp_hdr_len, uncompress_hdr_hc06(), and uncompress_hdr_hc1().

Referenced by netif_add().

static uint8_t output ( const uip_lladdr_t * localdest )

static

Take an IP packet and format it to be sent on an 802.15.4 network using 6lowpan.

Parameters

localdest The MAC address of the destination

The IP packet is initially in uip_buf. Its header is compressed and if necessary it is fragmented. The resulting packet/fragments are put in packetbuf and delivered to the 802.15.4 MAC.

References compress_hdr_hc06(), compress_hdr_hc1(), compress_hdr_ipv6(), COMPRESSION_THRESHOLD, framer::create, delay_ms, last_tx_status, linkaddr_copy(), linkaddr_null, MAC_MAX_PAYLOAD, MAC_TX_COLLISION, MAC_TX_ERR, MAC_TX_ERR_FATAL, NETSTACK_FRAMER, NULL, PACKETBUF_ADDR_RECEIVER, PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS, PACKETBUF_ATTR_PACKET_TYPE, PACKETBUF_ATTR_PACKET_TYPE_STREAM, PACKETBUF_ATTR_PACKET_TYPE_STREAM_END, packetbuf_clear(), packetbuf_dataptr(), PACKETBUF_FRAG_DISPATCH_SIZE, PACKETBUF_FRAG_OFFSET, PACKETBUF_FRAG_PTR, PACKETBUF_FRAG_TAG, packetbuf_ptr, packetbuf_set_addr(), packetbuf_set_attr(), packetbuf_set_datalen(), printf, PRINTFO, queuebuf_free(), queuebuf_new_from_packetbuf(), queuebuf_to_packetbuf(), RIMESTATS_ADD, send_packet(), SET16, set_packet_attrs(), SICSLOWPAN_DISPATCH_FRAG1, SICSLOWPAN_DISPATCH_FRAGN, SICSLOWPAN_FRAG1_HDR_LEN, SICSLOWPAN_FRAGN_HDR_LEN, SICSLOWPAN_MAX_MAC_TRANSMISSIONS, TCP_ACK, TCP_CTL, TCP_FIN, UIP_IP_BUF, uip_len, UIP_PROTO_TCP, UIP_TCP_BUF, and uncomp_hdr_len.

static void packet_sent	(	void *	ptr,
		int	status,
		int	transmissions
	)

static

Callback function for the MAC packet sent callback.

References last_tx_status, NULL, rime_sniffer::output_callback, PRINTF, status, and uip_ds6_link_neighbor_callback().

Referenced by send_packet().

void rime_sniffer_add ( struct rime_sniffer * s )

References s.

void rime_sniffer_remove ( struct rime_sniffer * s )

References NULL.

static void send_packet ( linkaddr_t * dest )

static

This function is called by the 6lowpan code to send out a packet.

Parameters

dest	the link layer destination address of the packet

References NETSTACK_MAC, NULL, packet_sent(), PACKETBUF_ADDR_RECEIVER, PACKETBUF_ADDR_SENDER, PACKETBUF_ATTR_RELIABLE, packetbuf_set_addr(), packetbuf_set_attr(), mac_driver::send, uip_lladdr, and wdt_reset_count().

Referenced by output().

static void set_packet_attrs ( void )

static

References c, PACKETBUF_ATTR_CHANNEL, PACKETBUF_ATTR_NETWORK_ID, packetbuf_set_attr(), UIP_ICMP_BUF, UIP_IP_BUF, UIP_PROTO_ICMP6, UIP_PROTO_TCP, UIP_PROTO_UDP, UIP_TCP_BUF, and UIP_UDP_BUF.

Referenced by input(), and output().

int sicslowpan_get_last_rssi ( void )

void sicslowpan_init ( void )

static void uncompress_addr	(	uip_ipaddr_t *	ipaddr,
		uint8_t const	prefix[],
		uint8_t	pref_post_count,
		uip_lladdr_t *	lladdr
	)

static

References PRINT6ADDR, PRINTF, uip_ip6addr_t::u8, and uip_ds6_set_addr_iid().

Referenced by uncompress_hdr_hc06().

static void uncompress_hdr_hc06	(	uint16_t	ip_len,
		uint8_t *	uip_buff,
		uint8_t *	rx_hdr_len
	)

static

Uncompress HC06 (i.e., IPHC and LOWPAN_UDP) headers and put them in sicslowpan_buf.

This function is called by the input function when the dispatch is HC06. We process the packet in the packetbuf buffer, uncompress the header fields, and copy the result in the sicslowpan buffer. At the end of the decompression, packetbuf_hdr_len and uncompressed_hdr_len are set to the appropriate values

Parameters

ip_len Equal to 0 if the packet is not a fragment (IP length is then inferred from the L2 length), non 0 if the packet is a 1st fragment.

References addr_context_lookup_by_number(), uip_ip_hdr::destipaddr, uip_udp_hdr::destport, uip_ip_hdr::flow, hc06_ptr, len, uip_ip_hdr::len, NULL, PACKETBUF_ADDR_RECEIVER, PACKETBUF_ADDR_SENDER, packetbuf_datalen(), packetbuf_ptr, prefix, sicslowpan_addr_context::prefix, PRINTF, uip_ip_hdr::proto, sicslowpan_buf, SICSLOWPAN_IP_BUF, SICSLOWPAN_IPHC_CID, SICSLOWPAN_IPHC_DAC, SICSLOWPAN_IPHC_DAM_11, SICSLOWPAN_IPHC_DAM_BIT, SICSLOWPAN_IPHC_FL_C, SICSLOWPAN_IPHC_M, SICSLOWPAN_IPHC_NH_C, SICSLOWPAN_IPHC_SAC, SICSLOWPAN_IPHC_SAM_11, SICSLOWPAN_IPHC_SAM_BIT, SICSLOWPAN_IPHC_TC_C, SICSLOWPAN_IPHC_TTL_I, SICSLOWPAN_NHC_UDP_CHECKSUMC, SICSLOWPAN_NHC_UDP_CS_P_00, SICSLOWPAN_NHC_UDP_CS_P_01, SICSLOWPAN_NHC_UDP_CS_P_10, SICSLOWPAN_NHC_UDP_CS_P_11, SICSLOWPAN_NHC_UDP_ID, SICSLOWPAN_NHC_UDP_MASK, SICSLOWPAN_UDP_4_BIT_PORT_MIN, SICSLOWPAN_UDP_8_BIT_PORT_MIN, uip_ip_hdr::srcipaddr, uip_udp_hdr::srcport, uip_ip_hdr::tcflow, uip_ip_hdr::ttl, uip_udp_hdr::udpchksum, uip_udp_hdr::udplen, UIP_HTONS, UIP_IPH_LEN, UIP_LLH_LEN, UIP_LLIPH_LEN, UIP_PROTO_UDP, UIP_UDPH_LEN, uncomp_hdr_len, uncompress_addr(), and uip_ip_hdr::vtc.

Referenced by input().

static void uncompress_hdr_hc1	(	uint16_t	ip_len,
		uint8_t *	uip_buff,
		uint8_t **	rx_hdr_len
	)

static

Uncompress HC1 (and HC_UDP) headers and put them in sicslowpan_buf.

This function is called by the input function when the dispatch is HC1. We process the packet in the packetbuf buffer, uncompress the header fields, and copy the result in the sicslowpan buffer. At the end of the decompression, packetbuf_hdr_len and uncompressed_hdr_len are set to the appropriate values

Parameters

ip_len Equal to 0 if the packet is not a fragment (IP length is then inferred from the L2 length), non 0 if the packet is a 1st fragment.

References uip_ip_hdr::destipaddr, uip_udp_hdr::destport, uip_ip_hdr::flow, len, uip_ip_hdr::len, PACKETBUF_ADDR_RECEIVER, PACKETBUF_ADDR_SENDER, packetbuf_datalen(), PACKETBUF_HC1_ENCODING, PACKETBUF_HC1_HC_UDP_CHKSUM, PACKETBUF_HC1_HC_UDP_HC1_ENCODING, PACKETBUF_HC1_HC_UDP_PORTS, PACKETBUF_HC1_HC_UDP_TTL, PACKETBUF_HC1_HC_UDP_UDP_ENCODING, PACKETBUF_HC1_TTL, PRINTF, uip_ip_hdr::proto, SICSLOWPAN_HC1_HC_UDP_HDR_LEN, SICSLOWPAN_HC1_HDR_LEN, SICSLOWPAN_HC1_NH_ICMP6, SICSLOWPAN_HC1_NH_TCP, SICSLOWPAN_HC1_NH_UDP, SICSLOWPAN_HC_UDP_ALL_C, uip_ip_hdr::srcipaddr, uip_udp_hdr::srcport, uip_ip_hdr::tcflow, uip_ip_hdr::ttl, uip_udp_hdr::udpchksum, uip_udp_hdr::udplen, uip_ds6_set_addr_iid(), UIP_HTONS, uip_ip6addr, UIP_IPH_LEN, UIP_LLH_LEN, UIP_LLIPH_LEN, UIP_PROTO_ICMP6, UIP_PROTO_TCP, UIP_PROTO_UDP, UIP_UDPH_LEN, uncomp_hdr_len, and uip_ip_hdr::vtc.

Referenced by input().

struct rime_sniffer* callback = NULL

static

struct sicslowpan_addr_context* context

static

Addresses contexts for IPHC.

pointer to an address context.

Referenced by sw_timer_register_callback().

uint8_t* hc06_ptr

static

pointer to the byte where to write next inline field.

Referenced by uncompress_hdr_hc06().

int last_rssi

static

int last_tx_status

static

the result of the last transmitted fragment

Referenced by output(), and packet_sent().

const uint8_t llprefix[] = {0xfe, 0x80}

uint8_t* packetbuf_ptr

static

A pointer to the packetbuf buffer.

We initialize it to the beginning of the packetbuf buffer, then access different fields by updating the offset packetbuf_hdr_len.

Referenced by compress_hdr_hc06(), compress_hdr_hc1(), compress_hdr_ipv6(), input(), output(), and uncompress_hdr_hc06().

const uint8_t ttl_values[] = {0, 1, 64, 255}

static

const uint8_t unc_ctxconf[] = {0x00,0x88,0x82,0x80}

const uint8_t unc_llconf[] = {0x0f,0x28,0x22,0x20}

const uint8_t unc_mxconf[] = {0x0f, 0x25, 0x23, 0x21}

uint8_t uncomp_hdr_len

static

uncomp_hdr_len is the length of the headers before compression (if HC2 is used this includes the UDP header in addition to the IP header).

Referenced by compress_hdr_hc06(), compress_hdr_hc1(), compress_hdr_ipv6(), input(), output(), uncompress_hdr_hc06(), and uncompress_hdr_hc1().

Microchip® Advanced Software Framework

Data Structures

Files

Macros

Functions

Variables

Pointers in the packetbuf buffer

Pointers in the sicslowpan and uip buffer

General variables

HC06 specific variables

HC06 related functions

HC1 compression and uncompression functions

IPv6 dispatch "compression" function

Input/output functions common to all compression schemes

General sicslowpan defines

6lowpan compressions

6lowpan dispatches

HC1 encoding

HC_UDP encoding (works together with HC1)

IPHC encoding

LOWPAN_UDP encoding (works together with IPHC)

The 6lowpan "headers" length

Address compressibility test functions