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Merge remote-tracking branch 'origin/master' into ieee802154

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This commit is contained in:
Gregory Nutt 2017-04-08 10:32:53 -06:00
commit 11a8f8f4a9
12 changed files with 408 additions and 317 deletions
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4
Documentation/README.html
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@ -8,7 +8,7 @@
<tr align="center" bgcolor="#e4e4e4">
<td>
<h1><big><font color="#3c34ec"><i>NuttX README Files</i></font></big></h1>
<p>Last Updated: March 23, 2017</p>
<p>Last Updated: April 8, 2017</p>
</td>
</tr>
</table>
@ -362,6 +362,8 @@ nuttx/
| | `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/mm/shm/README.txt" target="_blank"><b><i>README.txt</i></b></a>
| `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/mm/README.txt" target="_blank"><b><i>README.txt</i></b></a>
|- net/
| |- sixlowpan/
| | `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/net/sixlowpan/README.txt" target="_blank"><b><i>README.txt</i></b></a>
| `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/net/README.txt" target="_blank"><b><i>README.txt</i></b></a>
|- syscall/
| `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/syscall/README.txt" target="_blank"><b><i>README.txt</i></b></a>

2
README.txt
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@ -1750,6 +1750,8 @@ nuttx/
| | `- README.txt
| `- README.txt
|- net/
| |- sixlowpan
| | `- README.txt
| `- README.txt
|- syscall/
| `- README.txt

2
arch/sim/src/up_initialize.c
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@ -187,7 +187,7 @@ void up_initialize(void)
* separately.
*/
syslog(LOG_INFO, "SIM: Initializing");
syslog(LOG_INFO, "SIM: Initializing\n");
#endif
#ifdef CONFIG_PM

91
include/nuttx/net/netconfig.h
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@ -295,16 +295,13 @@
#endif
/* The UDP maximum packet size. This is should not be to set to more
* than NET_DEV_MTU(d) - NET_LL_HDRLEN(dev) - IPv*_HDRLEN.
*
* REVISIT: It is unclear to me if the UDP_HDRLEN should subtracted
* or not.
* than NET_DEV_MTU(d) - NET_LL_HDRLEN(dev) - UDP_HDRLEN - IPv*_HDRLEN.
*/
#define UDP_MSS(d,h) (NET_DEV_MTU(d) - NET_LL_HDRLEN(d) (h))
#define UDP_MSS(d,h) (NET_DEV_MTU(d) - NET_LL_HDRLEN(d) - UDP_HDRLEN (h))
#ifdef CONFIG_NET_ETHERNET
# define ETH_UDP_MSS(h) (CONFIG_NET_ETH_MTU - ETH_HDRLEN - (h))
# define ETH_UDP_MSS(h) (CONFIG_NET_ETH_MTU - ETH_HDRLEN - UDP_HDRLEN - (h))
# ifndef CONFIG_NET_MULTILINK
# define __MIN_UDP_MSS(h) ETH_UDP_MSS(h)
# define __MAX_UDP_MSS(h) ETH_UDP_MSS(h)
@ -312,7 +309,7 @@
#endif
#ifdef CONFIG_NET_6LOWPAN
# define IEEE802154_UDP_MSS(h) (CONFIG_NET_6LOWPAN_MAXPAYLOAD - (h))
# define IEEE802154_UDP_MSS(h) (CONFIG_NET_6LOWPAN_MAXPAYLOAD - UDP_HDRLEN - (h))
# ifndef CONFIG_NET_MULTILINK
# define __MIN_UDP_MSS(h) IEEE802154_UDP_MSS(h)
# define __MAX_UDP_MSS(h) IEEE802154_UDP_MSS(h)
@ -320,7 +317,7 @@
#endif
#ifdef CONFIG_NET_LOOPBACK
# define LO_UDP_MSS(h) (NET_LO_MTU - (h))
# define LO_UDP_MSS(h) (NET_LO_MTU - UDP_HDRLEN - (h))
# ifndef CONFIG_NET_MULTILINK
# define __MIN_UDP_MSS(h) LO_UDP_MSS(h)
# define __MAX_UDP_MSS(h) LO_UDP_MSS(h)
@ -328,7 +325,7 @@
#endif
#ifdef CONFIG_NET_SLIP
# define SLIP_UDP_MSS(h) (CONFIG_NET_SLIP_MTU - (h))
# define SLIP_UDP_MSS(h) (CONFIG_NET_SLIP_MTU - UDP_HDRLEN - (h))
# ifndef CONFIG_NET_MULTILINK
# define __MIN_UDP_MSS(h) SLIP_UDP_MSS(h)
# define __MAX_UDP_MSS(h) SLIP_UDP_MSS(h)
@ -383,27 +380,25 @@
# endif
#endif
/* NOTE: MSS calcuation excludes the UDP_HDRLEN. */
#ifdef CONFIG_NET_IPv4
# define UDP_IPv4_MSS(d) UDP_MSS(d,IPv4_HDRLEN)
# define ETH_IPv4_UDP_MSS ETH_UDP_MSS(IPv4_HDRLEN)
# define SLIP_IPv4_UDP_MSS SLIP_UDP_MSS(IPv4_HDRLEN)
# define UDP_IPv4_MSS(d) UDP_MSS(d,IPv4_HDRLEN)
# define ETH_IPv4_UDP_MSS ETH_UDP_MSS(IPv4_HDRLEN)
# define SLIP_IPv4_UDP_MSS SLIP_UDP_MSS(IPv4_HDRLEN)
# define MIN_IPv4_UDP_MSS __MIN_UDP_MSS(IPv4_HDRLEN)
# define MIN_UDP_MSS __MIN_UDP_MSS(IPv4_HDRLEN)
# define MIN_IPv4_UDP_MSS __MIN_UDP_MSS(IPv4_HDRLEN)
# define MIN_UDP_MSS __MIN_UDP_MSS(IPv4_HDRLEN)
# undef MAX_UDP_MSS
# define MAX_IPv4_UDP_MSS __MAX_UDP_MSS(IPv4_HDRLEN)
# define MAX_UDP_MSS __MAX_UDP_MSS(IPv4_HDRLEN)
# define MAX_IPv4_UDP_MSS __MAX_UDP_MSS(IPv4_HDRLEN)
# define MAX_UDP_MSS __MAX_UDP_MSS(IPv4_HDRLEN)
#endif
/* If IPv6 is support, it will have the smaller MSS */
#ifdef CONFIG_NET_IPv6
# undef MIN_UDP_MSS
# define MIN_IPv6_UDP_MSS __MIN_UDP_MSS(IPv6_HDRLEN)
# define MIN_UDP_MSS __MIN_UDP_MSS(IPv6_HDRLEN)
# define MIN_IPv6_UDP_MSS __MIN_UDP_MSS(IPv6_HDRLEN)
# define MIN_UDP_MSS __MIN_UDP_MSS(IPv6_HDRLEN)
#endif
/* TCP configuration options */
@ -473,17 +468,15 @@
* may support a different UDP MSS value. Here we arbitrarily select
* the minimum MSS for that case.
*
* REVISIT: It is unclear to me if the TCP_HDRLEN should subtracted
* or not.
* REVISIT: TCP_HDRLEN is not really a constant!
*/
#define TCP_MSS(d,h) (NET_DEV_MTU(d) - NET_LL_HDRLEN(d) - (h))
#define LO_TCP_MSS(h) (NET_LO_MTU - (h))
#define TCP_MSS(d,h) (NET_DEV_MTU(d) - NET_LL_HDRLEN(d) - TCP_HDRLEN - (h))
/* Get the smallest and largest MSS */
#ifdef CONFIG_NET_ETHERNET
# define ETH_TCP_MSS(h) (CONFIG_NET_ETH_MTU - ETH_HDRLEN - (h))
# define ETH_TCP_MSS(h) (CONFIG_NET_ETH_MTU - ETH_HDRLEN - TCP_HDRLEN - (h))
# ifndef CONFIG_NET_MULTILINK
# define __MIN_TCP_MSS(h) ETH_TCP_MSS(h)
# define __MAX_TCP_MSS(h) ETH_TCP_MSS(h)
@ -491,7 +484,7 @@
#endif
#ifdef CONFIG_NET_6LOWPAN
# define IEEE802154_TCP_MSS(h) CONFIG_NET_6LOWPAN_MAXPAYLOAD
# define IEEE802154_TCP_MSS(h) (CONFIG_NET_6LOWPAN_MAXPAYLOAD - TCP_HDRLEN - (h))
# ifndef CONFIG_NET_MULTILINK
# define __MIN_TCP_MSS(h) IEEE802154_TCP_MSS(h)
# define __MAX_TCP_MSS(h) IEEE802154_TCP_MSS(h)
@ -499,7 +492,7 @@
#endif
#ifdef CONFIG_NET_LOOPBACK
# define LO_TCP_MSS(h) (NET_LO_MTU - (h))
# define LO_TCP_MSS(h) (NET_LO_MTU - TCP_HDRLEN - (h))
# ifndef CONFIG_NET_MULTILINK
# define __MIN_TCP_MSS(h) LO_TCP_MSS(h)
# define __MAX_TCP_MSS(h) LO_TCP_MSS(h)
@ -507,7 +500,7 @@
#endif
#ifdef CONFIG_NET_SLIP
# define SLIP_TCP_MSS(h) (CONFIG_NET_SLIP_MTU - (h))
# define SLIP_TCP_MSS(h) (CONFIG_NET_SLIP_MTU - TCP_HDRLEN - (h))
# ifndef CONFIG_NET_MULTILINK
# define __MIN_TCP_MSS(h) SLIP_TCP_MSS(h)
# define __MAX_TCP_MSS(h) SLIP_TCP_MSS(h)
@ -568,26 +561,26 @@
*/
#ifdef CONFIG_NET_IPv6
# define TCP_IPv6_MSS(d) TCP_MSS(d,IPv6_HDRLEN)
# define ETH_IPv6_TCP_MSS ETH_TCP_MSS(IPv6_HDRLEN)
# define SLIP_IPv6_TCP_MSS SLIP_TCP_MSS(IPv6_HDRLEN)
# define MAX_TCP_MSS __MAX_TCP_MSS(IPv6_HDRLEN)
# define TCP_IPv6_MSS(d) TCP_MSS(d,IPv6_HDRLEN)
# define ETH_IPv6_TCP_MSS ETH_TCP_MSS(IPv6_HDRLEN)
# define SLIP_IPv6_TCP_MSS SLIP_TCP_MSS(IPv6_HDRLEN)
# define MAX_TCP_MSS __MAX_TCP_MSS(IPv6_HDRLEN)
#endif
#ifdef CONFIG_NET_IPv4
# define TCP_IPv4_MSS(d) TCP_MSS(d,IPv4_HDRLEN)
# define ETH_IPv4_TCP_MSS ETH_TCP_MSS(IPv4_HDRLEN)
# define SLIP_IPv4_TCP_MSS SLIP_TCP_MSS(IPv4_HDRLEN)
# define MIN_TCP_MSS __MIN_TCP_MSS(IPv4_HDRLEN)
# define TCP_IPv4_MSS(d) TCP_MSS(d,IPv4_HDRLEN)
# define ETH_IPv4_TCP_MSS ETH_TCP_MSS(IPv4_HDRLEN)
# define SLIP_IPv4_TCP_MSS SLIP_TCP_MSS(IPv4_HDRLEN)
# define MIN_TCP_MSS __MIN_TCP_MSS(IPv4_HDRLEN)
# undef MAX_TCP_MSS
# define MAX_TCP_MSS __MAX_TCP_MSS(IPv4_HDRLEN)
# define MAX_TCP_MSS __MAX_TCP_MSS(IPv4_HDRLEN)
#endif
/* If IPv6 is supported, it will have the smaller MSS */
#ifdef CONFIG_NET_IPv6
# undef MIN_TCP_MSS
# define MIN_TCP_MSS __MIN_TCP_MSS(IPv6_HDRLEN)
# define MIN_TCP_MSS __MIN_TCP_MSS(IPv6_HDRLEN)
#endif
/* The size of the advertised receiver's window.
@ -614,22 +607,28 @@
#endif
#if defined(CONFIG_NET_MULTILINK)
/* We are supporting multiple network devices using different link layer
* protocols. Get the size of the receive window from the device structure.
*/
/* We are supporting multiple network devices using different link layer
* protocols. Get the size of the receive window from the device
* structure.
*/
# define NET_DEV_RCVWNDO(d) ((d)->d_recvwndo)
#elif defined(CONFIG_NET_SLIP)
/* Only SLIP.. use the configured SLIP receive window size */
# define NET_DEV_RCVWNDO(d) CONFIG_NET_SLIP_TCP_RECVWNDO
#elif defined(CONFIG_NET_ETHERNET)
/* Only Ethernet.. use the configured SLIP receive window size */
# define NET_DEV_RCVWNDO(d) CONFIG_NET_ETH_TCP_RECVWNDO
#elif defined(CONFIG_NET_6LOWPAN)
/* Only 6loWPAN.. use the configured 6loWPAN receive window size */
# define NET_DEV_RCVWNDO(d) CONFIG_NET_6LOWPAN_TCP_RECVWNDO
#elif defined(CONFIG_NET_SLIP)
/* Only SLIP.. use the configured SLIP receive window size */
# define NET_DEV_RCVWNDO(d) CONFIG_NET_SLIP_TCP_RECVWNDO
#else /* if defined(CONFIG_NET_LOOPBACK) */
/* Only loal loopback.. use the fixed loopback receive window size */

169
include/nuttx/net/sixlowpan.h
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@ -63,6 +63,83 @@
* Pre-processor Definitions
****************************************************************************/
/* Frame format definitions *************************************************/
/* Fragment header.
*
* The fragment header is used when the payload is too large to fit in a
* single IEEE 802.15.4 frame. The fragment header contains three fields:
* Datagram size, datagram tag and datagram offset.
*
* 1. Datagram size describes the total (un-fragmented) payload.
* 2. Datagram tag identifies the set of fragments and is used to match
* fragments of the same payload.
* 3. Datagram offset identifies the fragment’s offset within the un-
* fragmented payload.
*
* The fragment header length is 4 bytes for the first header and 5
* bytes for all subsequent headers.
*/
#define RIME_FRAG_DISPATCH_SIZE 0 /* 16 bit */
#define RIME_FRAG_TAG 2 /* 16 bit */
#define RIME_FRAG_OFFSET 4 /* 8 bit */
/* Define the Rime buffer as a byte array */
#define RIME_HC1_DISPATCH 0 /* 8 bit */
#define RIME_HC1_ENCODING 1 /* 8 bit */
#define RIME_HC1_TTL 2 /* 8 bit */
#define RIME_HC1_HC_UDP_DISPATCH 0 /* 8 bit */
#define RIME_HC1_HC_UDP_HC1_ENCODING 1 /* 8 bit */
#define RIME_HC1_HC_UDP_UDP_ENCODING 2 /* 8 bit */
#define RIME_HC1_HC_UDP_TTL 3 /* 8 bit */
#define RIME_HC1_HC_UDP_PORTS 4 /* 8 bit */
#define RIME_HC1_HC_UDP_CHKSUM 5 /* 16 bit */
/* These are some definitions of element values used in the FCF. See the
* IEEE802.15.4 spec for details.
*/
#define FRAME802154_FRAMETYPE_SHIFT (0) /* Bits 0-2: Frame type */
#define FRAME802154_FRAMETYPE_MASK (7 << FRAME802154_FRAMETYPE_SHIFT)
#define FRAME802154_SECENABLED_SHIFT (3) /* Bit 3: Security enabled */
#define FRAME802154_FRAMEPENDING_SHIFT (4) /* Bit 4: Frame pending */
#define FRAME802154_ACKREQUEST_SHIFT (5) /* Bit 5: ACK request */
#define FRAME802154_PANIDCOMP_SHIFT (6) /* Bit 6: PANID compression */
/* Bits 7-9: Reserved */
#define FRAME802154_DSTADDR_SHIFT (2) /* Bits 10-11: Dest address mode */
#define FRAME802154_DSTADDR_MASK (3 << FRAME802154_DSTADDR_SHIFT)
#define FRAME802154_VERSION_SHIFT (4) /* Bit 12-13: Frame version */
#define FRAME802154_VERSION_MASK (3 << FRAME802154_VERSION_SHIFT)
#define FRAME802154_SRCADDR_SHIFT (6) /* Bits 14-15: Source address mode */
#define FRAME802154_SRCADDR_MASK (3 << FRAME802154_SRCADDR_SHIFT)
/* Unshifted values for use in struct frame802154_fcf_s */
#define FRAME802154_BEACONFRAME (0)
#define FRAME802154_DATAFRAME (1)
#define FRAME802154_ACKFRAME (2)
#define FRAME802154_CMDFRAME (3)
#define FRAME802154_BEACONREQ (7)
#define FRAME802154_IEEERESERVED (0)
#define FRAME802154_NOADDR (0) /* Only valid for ACK or Beacon frames */
#define FRAME802154_SHORTADDRMODE (2)
#define FRAME802154_LONGADDRMODE (3)
#define FRAME802154_NOBEACONS 0x0f
#define FRAME802154_BROADCASTADDR 0xffff
#define FRAME802154_BROADCASTPANDID 0xffff
#define FRAME802154_IEEE802154_2003 (0)
#define FRAME802154_IEEE802154_2006 (1)
#define FRAME802154_SECURITY_LEVEL_NONE (0)
#define FRAME802154_SECURITY_LEVEL_128 (3)
/* Min and Max compressible UDP ports - HC06 */
#define SIXLOWPAN_UDP_4_BIT_PORT_MIN 0xf0b0
@ -171,9 +248,71 @@
#define SIXLOWPAN_MAC_STDFRAME 127
/* Frame buffer helper macros.
/* Address compressibility test macros **************************************/
/* 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
*
* The IEEE802.15.4 MAC driver structures includes a list of IOB
* NOTE: we currently assume 64-bits prefixes
*/
/* 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. Big-endian, network order is
* assumed.
*/
#define SIXLOWPAN_IS_IID_16BIT_COMPRESSABLE(a) \
((((a)[4]) == 0x0000) && (((a)[5]) == HTONS(0x00ff)) && \
(((a)[6]) == 0xfe00))
/* 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. Parameter 'a' is typed uint8_t *
*/
#define SIXLOWPAN_IS_MCASTADDR_DECOMPRESSABLE(a) \
(((*a & 0x01) == 0) && \
((*(a + 1) == 0x01) || (*(a + 1) == 0x02)))
/* 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:
*
* XXXX:0000:0000:0000:0000:0000:0000:0001 All nodes address
* XXXX:0000:0000:0000:0000:0000:0000:0002 All routers address
*/
#define SIXLOWPAN_IS_MCASTADDR_COMPRESSABLE(a) \
((a)[1] == 0 && (a)[2] == 0 && (a)[3] == 0 && \
(a)[4] == 0 && (a)[5] == 0 && (a)[6] == 0 && \
((a)[7] == HTONS(0x0001) || (a)[7] == HTONS(0x0002)))
/* FFXX:0000:0000:0000:0000:00XX:XXXX:XXXX */
#define SIXLOWPAN_IS_MCASTADDR_COMPRESSABLE48(a) \
((a)[1] == 0 && (a)[2] == 0 && (a)[3] == 0 && \
(a)[4] == 0 && (((a)[5] & HTONS(0xff00)) == 0))
/* FFXX:0000:0000:0000:0000:0000:00XX:XXXX */
#define SIXLOWPAN_IS_MCASTADDR_COMPRESSABLE32(a) \
((a)[1] == 0 && (a)[2] == 0 && (a)[3] == 0 && \
(a)[4] == 0 && (a)[5] == 0 && ((a)[6] & HTONS(0xff00)) == 0)
/* FF02:0000:0000:0000:0000:0000:0000:00XX */
#define SIXLOWPAN_IS_MCASTADDR_COMPRESSABLE8(a) \
((((a)[0] & HTONS(0x00ff)) == HTONS(0x0002)) && \
(a)[1] == 0 && (a)[2] == 0 && (a)[3] == 0 && \
(a)[4] == 0 && (a)[5] == 0 && (a)[6] == 0 && \
(((a)[7] & HTONS(0xff00)) == 0x0000))
/* Frame buffer helper macros ***********************************************/
/* The IEEE802.15.4 MAC driver structures includes a list of IOB
* structures, i_framelist, containing frames to be sent by the driver or
* that were received by the driver. The IOB structure is defined in
* include/nuttx/net/iob.h. The length of data in the IOB is provided by
@ -376,28 +515,38 @@ struct ieee802154_driver_s
/* i_dgramtag. Datagram tag to be put in the header of the set of
* fragments. It is used by the recipient to match fragments of the
* same payload.
*
* This is the sender's copy of the tag. It is incremented after each
* fragmented packet is sent so that it will be unique to that
* sequence fragmentation. Its value is then persistent, the values of
* other fragmentatin variables are valid on during a single
* fragmentation sequence (while i_accumlen > 0)
*/
uint16_t i_dgramtag;
/* i_reasstag. Each frame in the reassembly has a tag. That tag must
* match the reassembly tag in the fragments being merged.
*
* This is the same tag as i_dgramtag but is saved on the receiving
* side to match all of the fragments of the packet.
*/
uint16_t i_reasstag;
/* i_pktlen. The total length of the IPv6 packet to be re-assembled in
* d_buf.
* d_buf. Used to determine when the re-assembly is complete.
*/
uint16_t i_pktlen;
/* The current accumulated length of the packet being received in d_buf.
* Included IPv6 and protocol headers.
* Included IPv6 and protocol headers. Currently used only to determine
* there is a fragmentation sequence in progress.
*/
uint16_t i_accumlen;
/* i_reasstag. Each frame in the reassembly has a tag. That tag must
* match the reassembly tag in the fragments being merged.
*/
uint16_t i_reasstag;
/* i_boffset. Offset to the beginning of data in d_buf. As each fragment
* is received, data is placed at an appriate offset added to this.
*/

4
include/pthread.h
View File

@ -354,10 +354,6 @@ typedef int pthread_rwlockattr_t;
PTHREAD_COND_INITIALIZER, \
0, 0}
#define PTHREAD_MUTEX_INITIALIZER {NULL, SEM_INITIALIZER(1), -1, \
__PTHREAD_MUTEX_DEFAULT_FLAGS, \
PTHREAD_MUTEX_DEFAULT, 0}
#ifdef CONFIG_PTHREAD_CLEANUP
/* This type describes the pthread cleanup callback (non-standard) */

73
net/sixlowpan/README.txt Normal file
View File

@ -0,0 +1,73 @@
Optimal 6loWPAN Configuration
-----------------------------
1. Link local IP addresses:
128 112 96 80 64 48 32 16
fe80 0000 0000 0000 xxxx xxxx xxxx xxxx
2. MAC-based IP addresses:
128 112 96 80 64 48 32 16
---- ---- ---- ---- ---- ---- ---- ----
xxxx xxxx xxxx xxxx xxxx 00ff fe00 MMMM 2-byte Rime address IEEE 48-bit MAC
fe80 0000 0000 0000 NNNN NNNN NNNN NNNN 8-byte Rime address IEEE EUI-64
Where MMM is the 2-byte rime address XOR 0x0200. For example, the MAC
address of 0xabcd would be 0xa9cd. And NNNN NNNN NNNN NNNN is the 8-byte
rime address address XOR 02000 0000 0000 0000
3. MAC based link-local addresses
128 112 96 80 64 48 32 16
---- ---- ---- ---- ---- ---- ---- ----
fe80 0000 0000 0000 0000 00ff fe00 MMMM 2-byte Rime address IEEE 48-bit MAC
fe80 0000 0000 0000 NNNN NNNN NNNN NNNN 8-byte Rime address IEEE EUI-64
4. Compressable port numbers in the rangs 0xf0b0-0xf0bf
5. IOBs: Must be big enough to hold one IEEE802.15.4 frame (CONFIG_NET_6LOWPAN_FRAMELEN,
typically 127). There must be enough IOBs to decompose the largest IPv6
packet (CONFIG_NET_6LOWPAN_MTU, default 1294, plus per frame overhead).
Fragmentation Headers
---------------------
A fragment header is placed at the beginning of the outgoing packet when the
payload is too large to fit in a single IEEE 802.15.4 frame. The fragment
header contains three fields: Datagram size, datagram tag and datagram
offset.
1. Datagram size describes the total (un-fragmented) payload.
2. Datagram tag identifies the set of fragments and is used to match
fragments of the same payload.
3. Datagram offset identifies the fragment’s offset within the un-
fragmented payload (in units of 8 bytes).
The length of the fragment header length is four bytes for the first header
(FRAG1) and five bytes for all subsequent headers (FRAGN). For example,
this is a HC1 compressed first frame of a packet
c50e 000b ### 4-byte FRAG1 header
01 08 01 0000 3412 ### 7-byte FCF header
42 ### SIXLOWPAN_DISPATCH_HC1
fb ### RIME_HC1_HC_UDP_HC1_ENCODING
e0 ### RIME_HC1_HC_UDP_UDP_ENCODING
00 ### RIME_HC1_HC_UDP_TTL
10 ### RIME_HC1_HC_UDP_PORTS
0000 ### RIME_HC1_HC_UDP_CHKSUM
4f4e452064617920 48656e6e792d7065 6e6e792077617320 7069636b696e6720 ### 80 byte payload
757020636f726e20 696e207468652063 6f726e7961726420 7768656e2d2d7768
61636b212d2d736f 6d657468696e6720 g
This is the second frame of the same transfer:
e50e 000b 0a ### 5 byte FRAGN header
01 08 01 0000 3412 ### 7-byte FCF header
6869742068657220 75706f6e20746865 20686561642e2027 476f6f646e657373 ### 88 byte payload
2067726163696f75 73206d6521272073 6169642048656e6e 792d70656e6e793b
202774686520736b 79277320612d676f 696e6720746f2066
The payload length is encoded in the LS 11-bits of the first 16-bit value:
In this example the payload size is 0x050e or 1,294. The tag is 0x000b. In
the second frame, the fifth byte contains the offset 0x0a which is 10 << 3 =
80 bytes, the size of the payload on the first packet.

69
net/sixlowpan/sixlowpan_framelist.c
View File

@ -112,6 +112,8 @@
static void sixlowpan_compress_ipv6hdr(FAR const struct ipv6_hdr_s *ipv6hdr,
FAR uint8_t *fptr)
{
uint16_t protosize;
/* Indicate the IPv6 dispatch and length */
fptr[g_frame_hdrlen] = SIXLOWPAN_DISPATCH_IPV6;
@ -122,33 +124,8 @@ static void sixlowpan_compress_ipv6hdr(FAR const struct ipv6_hdr_s *ipv6hdr,
memcpy(&fptr[g_frame_hdrlen] , ipv6hdr, IPv6_HDRLEN);
g_frame_hdrlen += IPv6_HDRLEN;
g_uncomp_hdrlen += IPv6_HDRLEN;
}
/****************************************************************************
* Name: sixlowpan_copy_protohdr
*
* Description:
* The IPv6 header should have already been processed (as reflected in the
* g_uncomphdrlen). But we probably still need to copy the following
* protocol header.
*
* Input Parameters:
* ipv6hdr - Pointer to the IPv6 header to "compress"
* fptr - Pointer to the beginning of the frame under construction
*
* Returned Value:
* None. But g_frame_hdrlen and g_uncomp_hdrlen updated.
*
****************************************************************************/
static void sixlowpan_copy_protohdr(FAR const struct ipv6_hdr_s *ipv6hdr,
FAR uint8_t *fptr)
{
uint16_t combined;
uint16_t protosize;
uint16_t copysize;
/* What is the total size of the IPv6 + protocol header? */
/* Copy the following protocol header, */
switch (ipv6hdr->proto)
{
@ -162,7 +139,6 @@ static void sixlowpan_copy_protohdr(FAR const struct ipv6_hdr_s *ipv6hdr,
*/
protosize = ((uint16_t)tcp->tcpoffset >> 4) << 2;
combined = sizeof(struct ipv6_hdr_s) + protosize;
}
break;
#endif
@ -170,48 +146,27 @@ static void sixlowpan_copy_protohdr(FAR const struct ipv6_hdr_s *ipv6hdr,
#ifdef CONFIG_NET_UDP
case IP_PROTO_UDP:
protosize = sizeof(struct udp_hdr_s);
combined = sizeof(struct ipv6udp_hdr_s);
break;
#endif
#ifdef CONFIG_NET_ICMPv6
case IP_PROTO_ICMP6:
protosize = sizeof(struct icmpv6_hdr_s);
combined = sizeof(struct ipv6icmp_hdr_s);
break;
#endif
default:
nwarn("WARNING: Unrecognized proto: %u\n", ipv6hdr->proto);
protosize = 0;
combined = sizeof(struct ipv6_hdr_s);
break;
return;
}
/* Copy the remaining protocol header. */
if (g_uncomp_hdrlen > IPv6_HDRLEN)
{
nwarn("WARNING: Protocol header not copied: "
"g_uncomp_hdren=%u IPv6_HDRLEN=%u\n",
g_uncomp_hdrlen, IPv6_HDRLEN);
return;
}
copysize = combined - g_uncomp_hdrlen;
if (copysize != protosize)
{
nwarn("WARNING: Protocol header size mismatch: "
"g_uncomp_hdren=%u copysize=%u protosize=%u\n",
g_uncomp_hdrlen, copysize, protosize);
return;
}
/* Copy the protocol header. */
memcpy(fptr + g_frame_hdrlen, (FAR uint8_t *)ipv6hdr + g_uncomp_hdrlen,
copysize);
protosize);
g_frame_hdrlen += copysize;
g_uncomp_hdrlen += copysize;
g_frame_hdrlen += protosize;
g_uncomp_hdrlen += protosize;
}
/****************************************************************************
@ -421,10 +376,6 @@ int sixlowpan_queue_frames(FAR struct ieee802154_driver_s *ieee,
g_frame_hdrlen += SIXLOWPAN_FRAG1_HDR_LEN;
/* Copy protocol header that follows the IPv6 header */
sixlowpan_copy_protohdr(destip, fptr);
/* Copy payload and enqueue. NOTE that the size is a multiple of eight
* bytes.
*/
@ -551,10 +502,6 @@ int sixlowpan_queue_frames(FAR struct ieee802154_driver_s *ieee,
DEBUGASSERT(verify == framer_hdrlen);
UNUSED(verify);
/* Copy protocol header that follows the IPv6 header */
sixlowpan_copy_protohdr(destip, fptr);
/* Copy the payload and queue */
memcpy(fptr + g_frame_hdrlen, buf, buflen);

18
net/sixlowpan/sixlowpan_hc06.c
View File

@ -440,7 +440,7 @@ void sixlowpan_hc06_initialize(void)
* ipv6 - The IPv6 header to be compressed
* destmac - L2 destination address, needed to compress the IP
* destination field
* fptr - Pointer to frame data payload.
* fptr - Pointer to frame to be compressed.
*
* Returned Value:
* None
@ -840,7 +840,7 @@ void sixlowpan_compresshdr_hc06(FAR struct ieee802154_driver_s *ieee,
* inferred from the L2 length), non 0 if the packet is a first
* fragment.
* iob - Pointer to the IOB containing the received frame.
* payptr - Pointer to the frame data payload.
* fptr - Pointer to frame to be compressed.
*
* Returned Value:
* None
@ -849,7 +849,7 @@ void sixlowpan_compresshdr_hc06(FAR struct ieee802154_driver_s *ieee,
void sixlowpan_uncompresshdr_hc06(FAR struct ieee802154_driver_s *ieee,
uint16_t iplen, FAR struct iob_s *iob,
FAR uint8_t *payptr)
FAR uint8_t *fptr)
{
FAR struct ipv6_hdr_s *ipv6 = IPv6BUF(ieee);
FAR uint8_t *iphc;
@ -857,18 +857,18 @@ void sixlowpan_uncompresshdr_hc06(FAR struct ieee802154_driver_s *ieee,
uint8_t iphc1;
uint8_t tmp;
/* payptr points to IPHC. At least two byte will be used for the encoding. */
/* iphc points to IPHC. At least two byte will be used for the encoding. */
iphc = payptr;
iphc = fptr + g_frame_hdrlen;
iphc0 = iphc[0];
iphc1 = iphc[1];
/* g_hc96ptr points to just after the 2-byte minimum IPHC */
g_hc06ptr = payptr + 2;
g_hc06ptr = iphc + 2;
ninfo("payptr=%p g_frame_hdrlen=%u iphc=%02x:%02x:%02x g_hc06ptr=%p\n",
payptr, g_frame_hdrlen, iphc[0], iphc[1], iphc[2], g_hc06ptr);
ninfo("fptr=%p g_frame_hdrlen=%u iphc=%02x:%02x:%02x g_hc06ptr=%p\n",
fptr, g_frame_hdrlen, iphc[0], iphc[1], iphc[2], g_hc06ptr);
/* Another if the CID flag is set */
@ -1171,7 +1171,7 @@ void sixlowpan_uncompresshdr_hc06(FAR struct ieee802154_driver_s *ieee,
}
}
g_frame_hdrlen = g_hc06ptr - payptr;
g_frame_hdrlen = g_hc06ptr - fptr;
/* IP length field. */

8
net/sixlowpan/sixlowpan_hc1.c
View File

@ -258,7 +258,7 @@ void sixlowpan_compresshdr_hc1(FAR struct ieee802154_driver_s *ieee,
* inferred from the L2 length), non 0 if the packet is a 1st
* fragment.
* iob - Pointer to the IOB containing the received frame.
* payptr - Pointer to the frame data payload.
* fptr - Pointer to frame to be uncompressed.
*
* Returned Value:
* Zero (OK) is returned on success, on failure a negater errno value is
@ -268,10 +268,10 @@ void sixlowpan_compresshdr_hc1(FAR struct ieee802154_driver_s *ieee,
int sixlowpan_uncompresshdr_hc1(FAR struct ieee802154_driver_s *ieee,
uint16_t iplen, FAR struct iob_s *iob,
FAR uint8_t *payptr)
FAR uint8_t *fptr)
{
FAR struct ipv6_hdr_s *ipv6 = IPv6BUF(&ieee->i_dev);
FAR uint8_t *hc1 = payptr + g_frame_hdrlen;
FAR uint8_t *hc1 = fptr + g_frame_hdrlen;
/* Format the IPv6 header in the device d_buf */
/* Set version, traffic clase, and flow label */
@ -312,7 +312,7 @@ int sixlowpan_uncompresshdr_hc1(FAR struct ieee802154_driver_s *ieee,
case SIXLOWPAN_HC1_NH_UDP:
{
FAR struct udp_hdr_s *udp = UDPIPv6BUF(&ieee->i_dev);
FAR uint8_t *hcudp = payptr + g_frame_hdrlen;
FAR uint8_t *hcudp = fptr + g_frame_hdrlen;
ipv6->proto = IP_PROTO_UDP;
if ((hcudp[RIME_HC1_HC_UDP_HC1_ENCODING] & 0x01) != 0)

138
net/sixlowpan/sixlowpan_input.c
View File

@ -190,6 +190,91 @@ int sixlowpan_recv_hdrlen(FAR const uint8_t *fptr)
return 0;
}
/****************************************************************************
* Name: sixlowpan_compress_ipv6hdr
*
* Description:
* IPv6 dispatch "compression" function. Packets "Compression" when only
* IPv6 dispatch is used
*
* There is no compression in this case, all fields are sent
* inline. We just add the IPv6 dispatch byte before the packet.
*
* 0 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | IPv6 Dsp | IPv6 header and payload ...
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* Input Parameters:
* ieee - The IEEE802.15.4 MAC network driver interface.
* fptr - Pointer to the beginning of the frame under construction
*
* Returned Value:
* None
*
****************************************************************************/
static void sixlowpan_uncompress_ipv6hdr(FAR struct ieee802154_driver_s *ieee,
FAR uint8_t *fptr)
{
FAR struct ipv6_hdr_s *ipv6 = IPv6BUF(&ieee->i_dev);
uint16_t protosize;
/* Put uncompressed IPv6 header in d_buf. */
g_frame_hdrlen += SIXLOWPAN_IPV6_HDR_LEN;
memcpy(ipv6, fptr + g_frame_hdrlen, IPv6_HDRLEN);
/* Update g_uncomp_hdrlen and g_frame_hdrlen. */
g_frame_hdrlen += IPv6_HDRLEN;
g_uncomp_hdrlen += IPv6_HDRLEN;
/* Copy the following protocol header, */
switch (ipv6->proto)
{
#ifdef CONFIG_NET_TCP
case IP_PROTO_TCP:
{
FAR struct tcp_hdr_s *tcp = &((FAR struct ipv6tcp_hdr_s *)ipv6)->tcp;
/* The TCP header length is encoded in the top 4 bits of the
* tcpoffset field (in units of 32-bit words).
*/
protosize = ((uint16_t)tcp->tcpoffset >> 4) << 2;
}
break;
#endif
#ifdef CONFIG_NET_UDP
case IP_PROTO_UDP:
protosize = sizeof(struct udp_hdr_s);
break;
#endif
#ifdef CONFIG_NET_ICMPv6
case IP_PROTO_ICMP6:
protosize = sizeof(struct icmpv6_hdr_s);
break;
#endif
default:
nwarn("WARNING: Unrecognized proto: %u\n", ipv6->proto);
return;
}
/* Copy the protocol header. */
memcpy((FAR uint8_t *)ipv6 + g_uncomp_hdrlen, fptr + g_frame_hdrlen,
protosize);
g_frame_hdrlen += protosize;
g_uncomp_hdrlen += protosize;
}
/****************************************************************************
* Public Functions
****************************************************************************/
@ -224,6 +309,7 @@ int sixlowpan_recv_hdrlen(FAR const uint8_t *fptr)
static int sixlowpan_frame_process(FAR struct ieee802154_driver_s *ieee,
FAR struct iob_s *iob)
{
FAR uint8_t *fptr; /* Convenience pointer to beginning of the frame */
FAR uint8_t *hc1; /* Convenience pointer to HC1 data */
uint16_t fragsize = 0; /* Size of the IP packet (read from fragment) */
uint16_t paysize; /* Size of the data payload */
@ -242,7 +328,8 @@ static int sixlowpan_frame_process(FAR struct ieee802154_driver_s *ieee,
* This size includes both fragmentation and FCF headers.
*/
hdrsize = sixlowpan_recv_hdrlen(iob->io_data);
fptr = iob->io_data;
hdrsize = sixlowpan_recv_hdrlen(fptr);
if (hdrsize < 0)
{
nwarn("Invalid IEEE802.15.2 header: %d\n", hdrsize);
@ -262,7 +349,7 @@ static int sixlowpan_frame_process(FAR struct ieee802154_driver_s *ieee,
* already includes the fragementation header, if presetn.
*/
switch ((GETINT16(iob->io_data, RIME_FRAG_DISPATCH_SIZE) & 0xf800) >> 8)
switch ((GETINT16(fptr, RIME_FRAG_DISPATCH_SIZE) & 0xf800) >> 8)
{
/* First fragment of new reassembly */
@ -270,8 +357,8 @@ static int sixlowpan_frame_process(FAR struct ieee802154_driver_s *ieee,
{
/* Set up for the reassembly */
fragsize = GETINT16(iob->io_data, RIME_FRAG_DISPATCH_SIZE) & 0x07ff;
fragtag = GETINT16(iob->io_data, RIME_FRAG_TAG);
fragsize = GETINT16(fptr, RIME_FRAG_DISPATCH_SIZE) & 0x07ff;
fragtag = GETINT16(fptr, RIME_FRAG_TAG);
ninfo("FRAG1: fragsize=%d fragtag=%d fragoffset=%d\n",
fragsize, fragtag, fragoffset);
@ -287,9 +374,9 @@ static int sixlowpan_frame_process(FAR struct ieee802154_driver_s *ieee,
{
/* Set offset, tag, size. Offset is in units of 8 bytes. */
fragoffset = iob->io_data[RIME_FRAG_OFFSET];
fragtag = GETINT16(iob->io_data, RIME_FRAG_TAG);
fragsize = GETINT16(iob->io_data, RIME_FRAG_DISPATCH_SIZE) & 0x07ff;
fragoffset = fptr[RIME_FRAG_OFFSET];
fragtag = GETINT16(fptr, RIME_FRAG_TAG);
fragsize = GETINT16(fptr, RIME_FRAG_DISPATCH_SIZE) & 0x07ff;
ninfo("FRAGN: fragsize=%d fragtag=%d fragoffset=%d\n",
fragsize, fragtag, fragoffset);
@ -429,19 +516,13 @@ static int sixlowpan_frame_process(FAR struct ieee802154_driver_s *ieee,
/* Process next dispatch and headers */
hc1 = &iob->io_data[g_frame_hdrlen];
hc1 = fptr + g_frame_hdrlen;
#ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC06
if ((hc1[RIME_HC1_DISPATCH] & SIXLOWPAN_DISPATCH_IPHC_MASK) == SIXLOWPAN_DISPATCH_IPHC)
{
FAR uint8_t *payptr;
ninfo("IPHC Dispatch\n");
/* Payload starts after the IEEE802.15.4 header(s) */
payptr = &iob->io_data[g_frame_hdrlen];
sixlowpan_uncompresshdr_hc06(ieee, fragsize, iob, payptr);
sixlowpan_uncompresshdr_hc06(ieee, fragsize, iob, fptr);
}
else
#endif /* CONFIG_NET_6LOWPAN_COMPRESSION_HC06 */
@ -449,33 +530,16 @@ static int sixlowpan_frame_process(FAR struct ieee802154_driver_s *ieee,
#ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC1
if (hc1[RIME_HC1_DISPATCH] == SIXLOWPAN_DISPATCH_HC1)
{
FAR uint8_t *payptr;
ninfo("HC1 Dispatch\n");
/* Payload starts after the IEEE802.15.4 header(s) */
payptr = &iob->io_data[g_frame_hdrlen];
sixlowpan_uncompresshdr_hc1(ieee, fragsize, iob, payptr);
sixlowpan_uncompresshdr_hc1(ieee, fragsize, iob, fptr);
}
else
#endif /* CONFIG_NET_6LOWPAN_COMPRESSION_HC1 */
if (hc1[RIME_HC1_DISPATCH] == SIXLOWPAN_DISPATCH_IPV6)
{
FAR struct ipv6_hdr_s *ipv6 = IPv6BUF(&ieee->i_dev);
ninfo("IPv6 Dispatch\n");
g_frame_hdrlen += SIXLOWPAN_IPV6_HDR_LEN;
/* Put uncompressed IP header in d_buf. */
memcpy(ipv6, iob->io_data + g_frame_hdrlen, IPv6_HDRLEN);
/* Update g_uncomp_hdrlen and g_frame_hdrlen. */
g_frame_hdrlen += IPv6_HDRLEN;
g_uncomp_hdrlen += IPv6_HDRLEN;
sixlowpan_uncompress_ipv6hdr(ieee, fptr);
}
else
{
@ -527,8 +591,7 @@ copypayload:
}
memcpy(ieee->i_dev.d_buf + g_uncomp_hdrlen + (fragoffset << 3),
iob->io_data + g_frame_hdrlen,
paysize);
fptr + g_frame_hdrlen, paysize);
#ifdef CONFIG_NET_6LOWPAN_FRAG
/* Update ieee->i_accumlen if the frame is a fragment, ieee->i_pktlen
@ -690,8 +753,7 @@ int sixlowpan_input(FAR struct ieee802154_driver_s *ieee)
FRAME_IOB_REMOVE(ieee, iob);
DEBUGASSERT(iob != NULL);
sixlowpan_dumpbuffer("Incoming frame",
(FAR const uint8_t *)iob->io_data, iob->io_len);
sixlowpan_dumpbuffer("Incoming frame", iob->io_data, iob->io_len);
/* Process the frame, decompressing it into the packet buffer */

147
net/sixlowpan/sixlowpan_internal.h
View File

@ -84,82 +84,6 @@
/* Pointers in the Rime buffer */
/* Fragment header.
*
* The fragment header is used when the payload is too large to fit in a
* single IEEE 802.15.4 frame. The fragment header contains three fields:
* Datagram size, datagram tag and datagram offset.
*
* 1. Datagram size describes the total (un-fragmented) payload.
* 2. Datagram tag identifies the set of fragments and is used to match
* fragments of the same payload.
* 3. Datagram offset identifies the fragment’s offset within the un-
* fragmented payload.
*
* The fragment header length is 4 bytes for the first header and 5
* bytes for all subsequent headers.
*/
#define RIME_FRAG_DISPATCH_SIZE 0 /* 16 bit */
#define RIME_FRAG_TAG 2 /* 16 bit */
#define RIME_FRAG_OFFSET 4 /* 8 bit */
/* Define the Rime buffer as a byte array */
#define RIME_HC1_DISPATCH 0 /* 8 bit */
#define RIME_HC1_ENCODING 1 /* 8 bit */
#define RIME_HC1_TTL 2 /* 8 bit */
#define RIME_HC1_HC_UDP_DISPATCH 0 /* 8 bit */
#define RIME_HC1_HC_UDP_HC1_ENCODING 1 /* 8 bit */
#define RIME_HC1_HC_UDP_UDP_ENCODING 2 /* 8 bit */
#define RIME_HC1_HC_UDP_TTL 3 /* 8 bit */
#define RIME_HC1_HC_UDP_PORTS 4 /* 8 bit */
#define RIME_HC1_HC_UDP_CHKSUM 5 /* 16 bit */
/* These are some definitions of element values used in the FCF. See the
* IEEE802.15.4 spec for details.
*/
#define FRAME802154_FRAMETYPE_SHIFT (0) /* Bits 0-2: Frame type */
#define FRAME802154_FRAMETYPE_MASK (7 << FRAME802154_FRAMETYPE_SHIFT)
#define FRAME802154_SECENABLED_SHIFT (3) /* Bit 3: Security enabled */
#define FRAME802154_FRAMEPENDING_SHIFT (4) /* Bit 4: Frame pending */
#define FRAME802154_ACKREQUEST_SHIFT (5) /* Bit 5: ACK request */
#define FRAME802154_PANIDCOMP_SHIFT (6) /* Bit 6: PANID compression */
/* Bits 7-9: Reserved */
#define FRAME802154_DSTADDR_SHIFT (2) /* Bits 10-11: Dest address mode */
#define FRAME802154_DSTADDR_MASK (3 << FRAME802154_DSTADDR_SHIFT)
#define FRAME802154_VERSION_SHIFT (4) /* Bit 12-13: Frame version */
#define FRAME802154_VERSION_MASK (3 << FRAME802154_VERSION_SHIFT)
#define FRAME802154_SRCADDR_SHIFT (6) /* Bits 14-15: Source address mode */
#define FRAME802154_SRCADDR_MASK (3 << FRAME802154_SRCADDR_SHIFT)
/* Unshifted values for use in struct frame802154_fcf_s */
#define FRAME802154_BEACONFRAME (0)
#define FRAME802154_DATAFRAME (1)
#define FRAME802154_ACKFRAME (2)
#define FRAME802154_CMDFRAME (3)
#define FRAME802154_BEACONREQ (7)
#define FRAME802154_IEEERESERVED (0)
#define FRAME802154_NOADDR (0) /* Only valid for ACK or Beacon frames */
#define FRAME802154_SHORTADDRMODE (2)
#define FRAME802154_LONGADDRMODE (3)
#define FRAME802154_NOBEACONS 0x0f
#define FRAME802154_BROADCASTADDR 0xffff
#define FRAME802154_BROADCASTPANDID 0xffff
#define FRAME802154_IEEE802154_2003 (0)
#define FRAME802154_IEEE802154_2006 (1)
#define FRAME802154_SECURITY_LEVEL_NONE (0)
#define FRAME802154_SECURITY_LEVEL_128 (3)
/* Packet buffer Definitions */
#define PACKETBUF_ATTR_PACKET_TYPE_DATA 0
@ -215,69 +139,6 @@
#define PACKETBUF_NUM_ADDRS 4
/* Address compressibility test macros **************************************/
/* 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
*/
/* 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. Big-endian, network order is
* assumed.
*/
#define SIXLOWPAN_IS_IID_16BIT_COMPRESSABLE(a) \
((((a)[4]) == 0x0000) && (((a)[5]) == HTONS(0x00ff)) && \
(((a)[6]) == 0xfe00))
/* 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. Parameter 'a' is typed uint8_t *
*/
#define SIXLOWPAN_IS_MCASTADDR_DECOMPRESSABLE(a) \
(((*a & 0x01) == 0) && \
((*(a + 1) == 0x01) || (*(a + 1) == 0x02)))
/* 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:
*
* XXXX:0000:0000:0000:0000:0000:0000:0001 All nodes address
* XXXX:0000:0000:0000:0000:0000:0000:0002 All routers address
*/
#define SIXLOWPAN_IS_MCASTADDR_COMPRESSABLE(a) \
((a)[1] == 0 && (a)[2] == 0 && (a)[3] == 0 && \
(a)[4] == 0 && (a)[5] == 0 && (a)[6] == 0 && \
((a)[7] == HTONS(0x0001) || (a)[7] == HTONS(0x0002)))
/* FFXX:0000:0000:0000:0000:00XX:XXXX:XXXX */
#define SIXLOWPAN_IS_MCASTADDR_COMPRESSABLE48(a) \
((a)[1] == 0 && (a)[2] == 0 && (a)[3] == 0 && \
(a)[4] == 0 && (((a)[5] & HTONS(0xff00)) == 0))
/* FFXX:0000:0000:0000:0000:0000:00XX:XXXX */
#define SIXLOWPAN_IS_MCASTADDR_COMPRESSABLE32(a) \
((a)[1] == 0 && (a)[2] == 0 && (a)[3] == 0 && \
(a)[4] == 0 && (a)[5] == 0 && ((a)[6] & HTONS(0xff00)) == 0)
/* FF02:0000:0000:0000:0000:0000:0000:00XX */
#define SIXLOWPAN_IS_MCASTADDR_COMPRESSABLE8(a) \
((((a)[0] & HTONS(0x00ff)) == HTONS(0x0002)) && \
(a)[1] == 0 && (a)[2] == 0 && (a)[3] == 0 && \
(a)[4] == 0 && (a)[5] == 0 && (a)[6] == 0 && \
(((a)[7] & HTONS(0xff00)) == 0x0000))
/* General helper macros ****************************************************/
#define GETINT16(ptr,index) \
@ -641,7 +502,7 @@ void sixlowpan_compresshdr_hc06(FAR struct ieee802154_driver_s *ieee,
* inferred from the L2 length), non 0 if the packet is a first
* fragment.
* iob - Pointer to the IOB containing the received frame.
* payptr - Pointer to the frame data payload.
* fptr - Pointer to frame to be uncompressed.
*
* Returned Value:
* None
@ -651,7 +512,7 @@ void sixlowpan_compresshdr_hc06(FAR struct ieee802154_driver_s *ieee,
#ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC06
void sixlowpan_uncompresshdr_hc06(FAR struct ieee802154_driver_s *ieee,
uint16_t iplen, FAR struct iob_s *iob,
FAR uint8_t *payptr);
FAR uint8_t *fptr);
#endif
/****************************************************************************
@ -701,7 +562,7 @@ void sixlowpan_compresshdr_hc1(FAR struct ieee802154_driver_s *ieee,
* inferred from the L2 length), non 0 if the packet is a first
* fragment.
* iob - Pointer to the IOB containing the received frame.
* payptr - Pointer to the frame data payload.
* fptr - Pointer to frame to be uncompressed.
*
* Returned Value:
* None
@ -711,7 +572,7 @@ void sixlowpan_compresshdr_hc1(FAR struct ieee802154_driver_s *ieee,
#ifdef CONFIG_NET_6LOWPAN_COMPRESSION_HC1
int sixlowpan_uncompresshdr_hc1(FAR struct ieee802154_driver_s *ieee,
uint16_t ip_len, FAR struct iob_s *iob,
FAR uint8_t *payptr);
FAR uint8_t *fptr);
#endif
/****************************************************************************