btsnoop - Man Page

The following opcodes are used by the BTSnoop/Monitor formats. The numeric values match the definitions in src/shared/btsnoop.h.

Code: 0x0000

Parameters:

• Type (1 octet)
• Bus (1 octet)
• BD_Addr (6 octets)
• Name (8 octets)

This opcode indicates that a new controller instance with a given index was added. With some transports (for example a single TTY device) the index is implicitly 0.

Code: 0x0001

Indicates that the controller with a specific index was removed.

The TTY protocol used by btmon with the --tty option is a little-endian packet format. Each packet uses this header:

struct tty_hdr {
    uint16_t data_len;
    uint16_t opcode;
    uint8_t  flags;
    uint8_t  hdr_len;
    uint8_t  ext_hdr[0];
} __attribute__ ((packed));

The payload starts at ext_hdr + hdr_len and has length data_len - 4 - hdr_len.

Each extension field is encoded as:

struct {
    uint8_t type;
    uint8_t value[length];
};

Defined types:

The drops fields contain the number of packets the implementation had to drop since the last reported drop count. Extension fields must be sorted by increasing type so unknown types can be skipped and the payload location discovered.