RFC 6455 Section 5.2, The WebSocket Protocol: Base Framing Protocol

Converting base 10 frame diagram to base 8 with byte offsets:

Original (https://tools.ietf.org/html/rfc6455#section-5.2):

   This wire format for the data transfer part is described by the ABNF
   [RFC5234] given in detail in this section.  (Note that, unlike in
   other sections of this document, the ABNF in this section is
   operating on groups of bits.  The length of each group of bits is
   indicated in a comment.  When encoded on the wire, the most
   significant bit is the leftmost in the ABNF).  A high-level overview
   of the framing is given in the following figure.  In a case of
   conflict between the figure below and the ABNF specified later in
   this section, the figure is authoritative.

      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
     +-+-+-+-+-------+-+-------------+-------------------------------+
     |F|R|R|R| opcode|M| Payload len |    Extended payload length    |
     |I|S|S|S|  (4)  |A|     (7)     |             (16/64)           |
     |N|V|V|V|       |S|             |   (if payload len==126/127)   |
     | |1|2|3|       |K|             |                               |
     +-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - +
     |     Extended payload length continued, if payload len == 127  |
     + - - - - - - - - - - - - - - - +-------------------------------+
     |                               |Masking-key, if MASK set to 1  |
     +-------------------------------+-------------------------------+
     | Masking-key (continued)       |          Payload Data         |
     +-------------------------------- - - - - - - - - - - - - - - - +
     :                     Payload Data continued ...                :
     + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
     |                     Payload Data continued ...                |
     +---------------------------------------------------------------+
     
     
Base 8 with byte offsets:
     

   This wire format for the data transfer part is described by the ABNF
   [RFC5234] given in detail in this section.  (Note that, unlike in
   other sections of this document, the ABNF in this section is
   operating on groups of bits.  The length of each group of bits is
   indicated in a comment.  When encoded on the wire, the most
   significant bit is the leftmost in the ABNF).  A high-level overview
   of the framing is given in the following figure.  In a case of
   conflict between the figure below and the ABNF specified later in
   this section, the figure is authoritative.

      0               1               2               3
      0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
     +-+-+-+-+-------+-+-------------+-------------------------------+
     |F|R|R|R| opcode|M| Payload len |    Extended payload length    |
     |I|S|S|S|  (4)  |A|     (7)     |             (16/64)           |
     |N|V|V|V|       |S|             |    (if payload len >= 126)    |
     | |1|2|3|       |K|             |                               |
     +-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - +
     |     Extended payload length continued, if payload len == 127  |
     + - - - - - - - - - - - - - - - +-------------------------------+
     |                               |Masking-key, if MASK set to 1  |
     +-------------------------------+-------------------------------+
     | Masking-key (continued)       |          Payload Data         |
     +-------------------------------- - - - - - - - - - - - - - - - +
     :                     Payload Data continued ...                :
     + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
     |                     Payload Data continued ...                |
     +---------------------------------------------------------------+