6loWPAN: Fix breakage in IPv6 dispatch caused by fixes to HC1 dispatch; Move some standard definitions from internal header file to include/nuttx/net/sixlowpan.h. Update a README.
This commit is contained in:
Gregory Nutt
parent
143b8f9591
commit
3f51180cca
@ -63,6 +63,83 @@
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* Pre-processor Definitions
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****************************************************************************/
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/* Frame format definitions *************************************************/
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/* Fragment header.
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*
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* The fragment header is used when the payload is too large to fit in a
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* single IEEE 802.15.4 frame. The fragment header contains three fields:
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* Datagram size, datagram tag and datagram offset.
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*
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* 1. Datagram size describes the total (un-fragmented) payload.
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* 2. Datagram tag identifies the set of fragments and is used to match
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* fragments of the same payload.
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* 3. Datagram offset identifies the fragment’s offset within the un-
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* fragmented payload.
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*
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* The fragment header length is 4 bytes for the first header and 5
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* bytes for all subsequent headers.
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*/
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#define RIME_FRAG_DISPATCH_SIZE 0 /* 16 bit */
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#define RIME_FRAG_TAG 2 /* 16 bit */
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#define RIME_FRAG_OFFSET 4 /* 8 bit */
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/* Define the Rime buffer as a byte array */
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#define RIME_HC1_DISPATCH 0 /* 8 bit */
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#define RIME_HC1_ENCODING 1 /* 8 bit */
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#define RIME_HC1_TTL 2 /* 8 bit */
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#define RIME_HC1_HC_UDP_DISPATCH 0 /* 8 bit */
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#define RIME_HC1_HC_UDP_HC1_ENCODING 1 /* 8 bit */
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#define RIME_HC1_HC_UDP_UDP_ENCODING 2 /* 8 bit */
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#define RIME_HC1_HC_UDP_TTL 3 /* 8 bit */
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#define RIME_HC1_HC_UDP_PORTS 4 /* 8 bit */
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#define RIME_HC1_HC_UDP_CHKSUM 5 /* 16 bit */
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/* These are some definitions of element values used in the FCF. See the
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* IEEE802.15.4 spec for details.
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*/
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#define FRAME802154_FRAMETYPE_SHIFT (0) /* Bits 0-2: Frame type */
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#define FRAME802154_FRAMETYPE_MASK (7 << FRAME802154_FRAMETYPE_SHIFT)
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#define FRAME802154_SECENABLED_SHIFT (3) /* Bit 3: Security enabled */
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#define FRAME802154_FRAMEPENDING_SHIFT (4) /* Bit 4: Frame pending */
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#define FRAME802154_ACKREQUEST_SHIFT (5) /* Bit 5: ACK request */
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#define FRAME802154_PANIDCOMP_SHIFT (6) /* Bit 6: PANID compression */
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/* Bits 7-9: Reserved */
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#define FRAME802154_DSTADDR_SHIFT (2) /* Bits 10-11: Dest address mode */
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#define FRAME802154_DSTADDR_MASK (3 << FRAME802154_DSTADDR_SHIFT)
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#define FRAME802154_VERSION_SHIFT (4) /* Bit 12-13: Frame version */
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#define FRAME802154_VERSION_MASK (3 << FRAME802154_VERSION_SHIFT)
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#define FRAME802154_SRCADDR_SHIFT (6) /* Bits 14-15: Source address mode */
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#define FRAME802154_SRCADDR_MASK (3 << FRAME802154_SRCADDR_SHIFT)
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/* Unshifted values for use in struct frame802154_fcf_s */
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#define FRAME802154_BEACONFRAME (0)
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#define FRAME802154_DATAFRAME (1)
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#define FRAME802154_ACKFRAME (2)
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#define FRAME802154_CMDFRAME (3)
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#define FRAME802154_BEACONREQ (7)
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#define FRAME802154_IEEERESERVED (0)
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#define FRAME802154_NOADDR (0) /* Only valid for ACK or Beacon frames */
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#define FRAME802154_SHORTADDRMODE (2)
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#define FRAME802154_LONGADDRMODE (3)
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#define FRAME802154_NOBEACONS 0x0f
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#define FRAME802154_BROADCASTADDR 0xffff
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#define FRAME802154_BROADCASTPANDID 0xffff
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#define FRAME802154_IEEE802154_2003 (0)
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#define FRAME802154_IEEE802154_2006 (1)
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#define FRAME802154_SECURITY_LEVEL_NONE (0)
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#define FRAME802154_SECURITY_LEVEL_128 (3)
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/* Min and Max compressible UDP ports - HC06 */
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#define SIXLOWPAN_UDP_4_BIT_PORT_MIN 0xf0b0
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@ -171,9 +248,71 @@
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#define SIXLOWPAN_MAC_STDFRAME 127
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/* Frame buffer helper macros.
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/* Address compressibility test macros **************************************/
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/* Check whether we can compress the IID in address 'a' to 16 bits. This is
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* used for unicast addresses only, and is true if the address is on the
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* format <PREFIX>::0000:00ff:fe00:XXXX
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*
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* The IEEE802.15.4 MAC driver structures includes a list of IOB
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* NOTE: we currently assume 64-bits prefixes
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*/
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/* Check whether we can compress the IID in address 'a' to 16 bits. This is
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* used for unicast addresses only, and is true if the address is on the
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* format <PREFIX>::0000:00ff:fe00:XXXX.
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*
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* NOTE: we currently assume 64-bits prefixes. Big-endian, network order is
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* assumed.
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*/
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#define SIXLOWPAN_IS_IID_16BIT_COMPRESSABLE(a) \
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((((a)[4]) == 0x0000) && (((a)[5]) == HTONS(0x00ff)) && \
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(((a)[6]) == 0xfe00))
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/* Check whether the 9-bit group-id of the compressed multicast address is
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* known. It is true if the 9-bit group is the all nodes or all routers
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* group. Parameter 'a' is typed uint8_t *
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*/
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#define SIXLOWPAN_IS_MCASTADDR_DECOMPRESSABLE(a) \
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(((*a & 0x01) == 0) && \
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((*(a + 1) == 0x01) || (*(a + 1) == 0x02)))
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/* Check whether the 112-bit group-id of the multicast address is mappable
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* to a 9-bit group-id. It is true if the group is the all nodes or all
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* routers group:
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*
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* XXXX:0000:0000:0000:0000:0000:0000:0001 All nodes address
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* XXXX:0000:0000:0000:0000:0000:0000:0002 All routers address
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*/
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#define SIXLOWPAN_IS_MCASTADDR_COMPRESSABLE(a) \
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((a)[1] == 0 && (a)[2] == 0 && (a)[3] == 0 && \
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(a)[4] == 0 && (a)[5] == 0 && (a)[6] == 0 && \
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((a)[7] == HTONS(0x0001) || (a)[7] == HTONS(0x0002)))
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/* FFXX:0000:0000:0000:0000:00XX:XXXX:XXXX */
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#define SIXLOWPAN_IS_MCASTADDR_COMPRESSABLE48(a) \
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((a)[1] == 0 && (a)[2] == 0 && (a)[3] == 0 && \
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(a)[4] == 0 && (((a)[5] & HTONS(0xff00)) == 0))
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/* FFXX:0000:0000:0000:0000:0000:00XX:XXXX */
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#define SIXLOWPAN_IS_MCASTADDR_COMPRESSABLE32(a) \
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((a)[1] == 0 && (a)[2] == 0 && (a)[3] == 0 && \
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(a)[4] == 0 && (a)[5] == 0 && ((a)[6] & HTONS(0xff00)) == 0)
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/* FF02:0000:0000:0000:0000:0000:0000:00XX */
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#define SIXLOWPAN_IS_MCASTADDR_COMPRESSABLE8(a) \
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((((a)[0] & HTONS(0x00ff)) == HTONS(0x0002)) && \
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(a)[1] == 0 && (a)[2] == 0 && (a)[3] == 0 && \
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(a)[4] == 0 && (a)[5] == 0 && (a)[6] == 0 && \
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(((a)[7] & HTONS(0xff00)) == 0x0000))
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/* Frame buffer helper macros ***********************************************/
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/* The IEEE802.15.4 MAC driver structures includes a list of IOB
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* structures, i_framelist, containing frames to be sent by the driver or
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* that were received by the driver. The IOB structure is defined in
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* include/nuttx/net/iob.h. The length of data in the IOB is provided by
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@ -1,4 +1,5 @@
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Optimal 6loWPAN Configuration:
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Optimal 6loWPAN Configuration
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-----------------------------
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1. Link local IP addresses:
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@ -27,4 +28,46 @@ Optimal 6loWPAN Configuration:
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5. IOBs: Must be big enough to hold one IEEE802.15.4 frame (CONFIG_NET_6LOWPAN_FRAMELEN,
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typically 127). There must be enough IOBs to decompose the largest IPv6
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packet (CONFIG_NET_6LOWPAN_MTU, default 1294, plus per frame overhead).
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packet (CONFIG_NET_6LOWPAN_MTU, default 1294, plus per frame overhead).
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Fragmentation Headers
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---------------------
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A fragment header is placed at the beginning of the outgoing packet when the
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payload is too large to fit in a single IEEE 802.15.4 frame. The fragment
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header contains three fields: Datagram size, datagram tag and datagram
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offset.
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1. Datagram size describes the total (un-fragmented) payload.
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2. Datagram tag identifies the set of fragments and is used to match
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fragments of the same payload.
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3. Datagram offset identifies the fragment’s offset within the un-
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fragmented payload (in units of 8 bytes).
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The length of the fragment header length is four bytes for the first header
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(FRAG1) and five bytes for all subsequent headers (FRAGN). For example,
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this is a HC1 compressed first frame of a packet
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c50e 000b ### 4-byte FRAG1 header
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01 08 01 0000 3412 ### 7-byte FCF header
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42 ### SIXLOWPAN_DISPATCH_HC1
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fb ### RIME_HC1_HC_UDP_HC1_ENCODING
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e0 ### RIME_HC1_HC_UDP_UDP_ENCODING
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00 ### RIME_HC1_HC_UDP_TTL
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10 ### RIME_HC1_HC_UDP_PORTS
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0000 ### RIME_HC1_HC_UDP_CHKSUM
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4f4e452064617920 48656e6e792d7065 6e6e792077617320 7069636b696e6720 ### 80 byte payload
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757020636f726e20 696e207468652063 6f726e7961726420 7768656e2d2d7768
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61636b212d2d736f 6d657468696e6720 g
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This is the second frame of the same transfer:
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e50e 000b 0a ### 5 byte FRAGN header
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01 08 01 0000 3412 ### 7-byte FCF header
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6869742068657220 75706f6e20746865 20686561642e2027 476f6f646e657373 ### 88 byte payload
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2067726163696f75 73206d6521272073 6169642048656e6e 792d70656e6e793b
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202774686520736b 79277320612d676f 696e6720746f2066
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The payload length is encoded in the LS 11-bits of the first 16-bit value:
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In this example the payload size is 0x050e or 1,294. The tag is 0x000b. In
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the second frame, the fifth byte contains the offset 0x0a which is 10 << 3 =
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80 bytes, the size of the payload on the first packet.
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@ -190,6 +190,91 @@ int sixlowpan_recv_hdrlen(FAR const uint8_t *fptr)
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return 0;
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}
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/****************************************************************************
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* Name: sixlowpan_compress_ipv6hdr
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*
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* Description:
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* IPv6 dispatch "compression" function. Packets "Compression" when only
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* IPv6 dispatch is used
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*
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* There is no compression in this case, all fields are sent
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* inline. We just add the IPv6 dispatch byte before the packet.
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*
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* 0 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | IPv6 Dsp | IPv6 header and payload ...
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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* Input Parameters:
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* ieee - The IEEE802.15.4 MAC network driver interface.
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* fptr - Pointer to the beginning of the frame under construction
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static void sixlowpan_uncompress_ipv6hdr(FAR struct ieee802154_driver_s *ieee,
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FAR uint8_t *fptr)
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{
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FAR struct ipv6_hdr_s *ipv6 = IPv6BUF(&ieee->i_dev);
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uint16_t protosize;
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/* Put uncompressed IPv6 header in d_buf. */
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g_frame_hdrlen += SIXLOWPAN_IPV6_HDR_LEN;
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memcpy(ipv6, fptr + g_frame_hdrlen, IPv6_HDRLEN);
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/* Update g_uncomp_hdrlen and g_frame_hdrlen. */
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g_frame_hdrlen += IPv6_HDRLEN;
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g_uncomp_hdrlen += IPv6_HDRLEN;
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/* Copy the following protocol header, */
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switch (ipv6->proto)
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{
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#ifdef CONFIG_NET_TCP
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case IP_PROTO_TCP:
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{
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FAR struct tcp_hdr_s *tcp = &((FAR struct ipv6tcp_hdr_s *)ipv6)->tcp;
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/* The TCP header length is encoded in the top 4 bits of the
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* tcpoffset field (in units of 32-bit words).
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*/
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protosize = ((uint16_t)tcp->tcpoffset >> 4) << 2;
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}
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break;
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#endif
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#ifdef CONFIG_NET_UDP
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case IP_PROTO_UDP:
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protosize = sizeof(struct udp_hdr_s);
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break;
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#endif
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#ifdef CONFIG_NET_ICMPv6
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case IP_PROTO_ICMP6:
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protosize = sizeof(struct icmpv6_hdr_s);
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break;
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#endif
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default:
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nwarn("WARNING: Unrecognized proto: %u\n", ipv6->proto);
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return;
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}
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/* Copy the protocol header. */
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memcpy((FAR uint8_t *)ipv6 + g_uncomp_hdrlen, fptr + g_frame_hdrlen,
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protosize);
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g_frame_hdrlen += protosize;
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g_uncomp_hdrlen += protosize;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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@ -437,9 +522,6 @@ static int sixlowpan_frame_process(FAR struct ieee802154_driver_s *ieee,
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if ((hc1[RIME_HC1_DISPATCH] & SIXLOWPAN_DISPATCH_IPHC_MASK) == SIXLOWPAN_DISPATCH_IPHC)
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{
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ninfo("IPHC Dispatch\n");
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/* Payload starts after the IEEE802.15.4 header(s) */
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sixlowpan_uncompresshdr_hc06(ieee, fragsize, iob, fptr);
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}
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else
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@ -449,29 +531,15 @@ static int sixlowpan_frame_process(FAR struct ieee802154_driver_s *ieee,
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if (hc1[RIME_HC1_DISPATCH] == SIXLOWPAN_DISPATCH_HC1)
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{
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ninfo("HC1 Dispatch\n");
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/* Payload starts after the IEEE802.15.4 header(s) */
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sixlowpan_uncompresshdr_hc1(ieee, fragsize, iob, fptr);
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sixlowpan_uncompresshdr_hc1(ieee, fragsize, iob, fptr);
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}
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else
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#endif /* CONFIG_NET_6LOWPAN_COMPRESSION_HC1 */
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if (hc1[RIME_HC1_DISPATCH] == SIXLOWPAN_DISPATCH_IPV6)
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{
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FAR struct ipv6_hdr_s *ipv6 = IPv6BUF(&ieee->i_dev);
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ninfo("IPv6 Dispatch\n");
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g_frame_hdrlen += SIXLOWPAN_IPV6_HDR_LEN;
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/* Put uncompressed IP header in d_buf. */
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memcpy(ipv6, fptr + g_frame_hdrlen, IPv6_HDRLEN);
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/* Update g_uncomp_hdrlen and g_frame_hdrlen. */
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g_frame_hdrlen += IPv6_HDRLEN;
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g_uncomp_hdrlen += IPv6_HDRLEN;
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sixlowpan_uncompress_ipv6hdr(ieee, fptr);
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}
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else
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{
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@ -84,82 +84,6 @@
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/* Pointers in the Rime buffer */
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/* Fragment header.
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*
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* The fragment header is used when the payload is too large to fit in a
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* single IEEE 802.15.4 frame. The fragment header contains three fields:
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* Datagram size, datagram tag and datagram offset.
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*
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* 1. Datagram size describes the total (un-fragmented) payload.
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* 2. Datagram tag identifies the set of fragments and is used to match
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* fragments of the same payload.
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* 3. Datagram offset identifies the fragment’s offset within the un-
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* fragmented payload.
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*
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* The fragment header length is 4 bytes for the first header and 5
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* bytes for all subsequent headers.
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*/
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#define RIME_FRAG_DISPATCH_SIZE 0 /* 16 bit */
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#define RIME_FRAG_TAG 2 /* 16 bit */
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#define RIME_FRAG_OFFSET 4 /* 8 bit */
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/* Define the Rime buffer as a byte array */
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#define RIME_HC1_DISPATCH 0 /* 8 bit */
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#define RIME_HC1_ENCODING 1 /* 8 bit */
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#define RIME_HC1_TTL 2 /* 8 bit */
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#define RIME_HC1_HC_UDP_DISPATCH 0 /* 8 bit */
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#define RIME_HC1_HC_UDP_HC1_ENCODING 1 /* 8 bit */
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#define RIME_HC1_HC_UDP_UDP_ENCODING 2 /* 8 bit */
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#define RIME_HC1_HC_UDP_TTL 3 /* 8 bit */
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#define RIME_HC1_HC_UDP_PORTS 4 /* 8 bit */
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#define RIME_HC1_HC_UDP_CHKSUM 5 /* 16 bit */
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/* These are some definitions of element values used in the FCF. See the
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* IEEE802.15.4 spec for details.
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*/
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#define FRAME802154_FRAMETYPE_SHIFT (0) /* Bits 0-2: Frame type */
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#define FRAME802154_FRAMETYPE_MASK (7 << FRAME802154_FRAMETYPE_SHIFT)
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#define FRAME802154_SECENABLED_SHIFT (3) /* Bit 3: Security enabled */
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#define FRAME802154_FRAMEPENDING_SHIFT (4) /* Bit 4: Frame pending */
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#define FRAME802154_ACKREQUEST_SHIFT (5) /* Bit 5: ACK request */
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#define FRAME802154_PANIDCOMP_SHIFT (6) /* Bit 6: PANID compression */
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/* Bits 7-9: Reserved */
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#define FRAME802154_DSTADDR_SHIFT (2) /* Bits 10-11: Dest address mode */
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#define FRAME802154_DSTADDR_MASK (3 << FRAME802154_DSTADDR_SHIFT)
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#define FRAME802154_VERSION_SHIFT (4) /* Bit 12-13: Frame version */
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#define FRAME802154_VERSION_MASK (3 << FRAME802154_VERSION_SHIFT)
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#define FRAME802154_SRCADDR_SHIFT (6) /* Bits 14-15: Source address mode */
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#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) \
|
||||
|
||||
Loading…
Reference in New Issue
Block a user