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Contiki 2.5
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Files | |
| file | frame802154.c |
| 802.15.4 frame creation and parsing functions | |
| file | frame802154.h |
| 802.15.4 frame creation and parsing functions | |
Data Structures | |
| struct | frame802154_fcf_t |
| The IEEE 802.15.4 frame has a number of constant/fixed fields that can be counted to make frame construction and max payload calculations easier. More... | |
| struct | frame802154_scf_t |
| 802.15.4 security control bitfield. More... | |
| struct | frame802154_aux_hdr_t |
| 802.15.4 Aux security header More... | |
| struct | frame802154_t |
| Parameters used by the frame802154_create() function. More... | |
FCF element values definitions | |
These are some definitions of values used in the FCF. See the 802.15.4 spec for details. | |
| uint8_t | frame802154_hdrlen (frame802154_t *p) |
| Calculates the length of the frame header. More... | |
| uint8_t | frame802154_create (frame802154_t *p, uint8_t *buf, uint8_t buf_len) |
| Creates a frame for transmission over the air. More... | |
| uint8_t | frame802154_parse (uint8_t *data, uint8_t len, frame802154_t *pf) |
| Parses an input frame. More... | |
| #define | FRAME802154_BEACONFRAME (0x00) |
| #define | FRAME802154_DATAFRAME (0x01) |
| #define | FRAME802154_ACKFRAME (0x02) |
| #define | FRAME802154_CMDFRAME (0x03) |
| #define | FRAME802154_BEACONREQ (0x07) |
| #define | FRAME802154_IEEERESERVED (0x00) |
| #define | FRAME802154_NOADDR (0x00) |
| Only valid for ACK or Beacon frames. More... | |
| #define | FRAME802154_SHORTADDRMODE (0x02) |
| #define | FRAME802154_LONGADDRMODE (0x03) |
| #define | FRAME802154_NOBEACONS (0x0F) |
| #define | FRAME802154_BROADCASTADDR (0xFFFF) |
| #define | FRAME802154_BROADCASTPANDID (0xFFFF) |
| #define | FRAME802154_IEEE802154_2003 (0x00) |
| #define | FRAME802154_IEEE802154_2006 (0x01) |
| #define | FRAME802154_SECURITY_LEVEL_NONE (0) |
| #define | FRAME802154_SECURITY_LEVEL_128 (3) |
| #define FRAME802154_NOADDR (0x00) |
Only valid for ACK or Beacon frames.
Definition at line 88 of file frame802154.h.
| uint8_t frame802154_create | ( | frame802154_t * | p, |
| uint8_t * | buf, | ||
| uint8_t | buf_len | ||
| ) |
Creates a frame for transmission over the air.
This function is meant to be called by a higher level function, that interfaces to a MAC.
| p | Pointer to frame802154_t struct, which specifies the frame to send. |
| buf | Pointer to the buffer to use for the frame. |
| buf_len | The length of the buffer to use for the frame. |
Definition at line 181 of file frame802154.c.
References frame802154_fcf_t::ack_required, frame802154_t::dest_addr, frame802154_fcf_t::dest_addr_mode, frame802154_t::dest_pid, frame802154_t::fcf, frame802154_fcf_t::frame_pending, frame802154_fcf_t::frame_type, frame802154_fcf_t::frame_version, frame802154_fcf_t::panid_compression, frame802154_fcf_t::security_enabled, frame802154_t::seq, frame802154_t::src_addr, frame802154_fcf_t::src_addr_mode, and frame802154_t::src_pid.
| uint8_t frame802154_hdrlen | ( | frame802154_t * | p | ) |
Calculates the length of the frame header.
This function is meant to be called by a higher level function, that interfaces to a MAC.
| p | Pointer to frame802154_t_t struct, which specifies the frame to send. |
Definition at line 158 of file frame802154.c.
| uint8_t frame802154_parse | ( | uint8_t * | data, |
| uint8_t | len, | ||
| frame802154_t * | pf | ||
| ) |
Parses an input frame.
Scans the input frame to find each section, and stores the information of each section in a frame802154_t structure.
| data | The input data from the radio chip. |
| len | The size of the input data |
| pf | The frame802154_t struct to store the parsed frame information. |
Definition at line 253 of file frame802154.c.
References frame802154_fcf_t::ack_required, frame802154_t::dest_addr, frame802154_fcf_t::dest_addr_mode, frame802154_t::dest_pid, frame802154_t::fcf, frame802154_fcf_t::frame_pending, frame802154_fcf_t::frame_type, frame802154_fcf_t::frame_version, frame802154_fcf_t::panid_compression, frame802154_t::payload, frame802154_t::payload_len, rimeaddr_copy(), rimeaddr_null, frame802154_fcf_t::security_enabled, frame802154_t::seq, frame802154_t::src_addr, frame802154_fcf_t::src_addr_mode, and frame802154_t::src_pid.
| uint8_t frame802154_fcf_t::ack_required |
1 bit.
Is an ack frame required?
Definition at line 124 of file frame802154.h.
Referenced by frame802154_create(), and frame802154_parse().
| uint8_t frame802154_fcf_t::dest_addr_mode |
< 3 bit.
Unused bits 2 bit. Destination address mode, see 802.15.4
Definition at line 127 of file frame802154.h.
Referenced by frame802154_create(), and frame802154_parse().
| uint8_t frame802154_fcf_t::frame_pending |
1 bit.
True if sender has more data to send
Definition at line 123 of file frame802154.h.
Referenced by frame802154_create(), and frame802154_parse().
| uint8_t frame802154_fcf_t::frame_type |
3 bit.
Frame type field, see 802.15.4
Definition at line 121 of file frame802154.h.
Referenced by frame802154_create(), and frame802154_parse().
| uint8_t frame802154_fcf_t::frame_version |
2 bit.
802.15.4 frame version
Definition at line 128 of file frame802154.h.
Referenced by frame802154_create(), and frame802154_parse().
| uint8_t frame802154_scf_t::key_id_mode |
| uint8_t frame802154_fcf_t::panid_compression |
1 bit.
Is this a compressed header?
Definition at line 125 of file frame802154.h.
Referenced by frame802154_create(), and frame802154_parse().
| uint8_t frame802154_scf_t::reserved |
| uint8_t frame802154_fcf_t::security_enabled |
1 bit.
True if security is used in this frame
Definition at line 122 of file frame802154.h.
Referenced by frame802154_create(), and frame802154_parse().
| uint8_t frame802154_scf_t::security_level |
| uint8_t frame802154_fcf_t::src_addr_mode |
2 bit.
Source address mode, see 802.15.4
Definition at line 129 of file frame802154.h.
Referenced by frame802154_create(), and frame802154_parse().
1.8.3.1