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
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |body_l.|sequen.|        signature        |  len1 |             |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |                     element1                    |  ...  |     |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+     +
    |                                                               |
    +                              ...                              +
    |                                                               |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Generated with::
    protocol "body_length:4,sequence:4,signature:13,len1:4,
        element1:32,...:4,...:67" --bits 32

As per ROS Melodic Morenia v1.14.5. this package is generally
seen separated from a TCPROSHeader. An exemplary such package::

    AB 00 00 00 00 00 00 00 7D 81 03 5F 7C A4 3F 0E  ........}.._|.?.
    00 00 00 00 02 09 00 00 00 2F 6C 69 73 74 65 6E  ........./listen
    65 72 18 00 00 00 49 20 68 65 61 72 64 3A 20 5B  er....I heard: [
    68 65 6C 6C 6F 20 77 6F 72 6C 64 20 33 5D 47 00  hello world 3]G.
    00 00 2F 74 6D 70 2F 62 69 6E 61 72 79 64 65 62  ../tmp/binarydeb
    2F 72 6F 73 2D 6D 65 6C 6F 64 69 63 2D 72 6F 73  /ros-melodic-ros
    63 70 70 2D 74 75 74 6F 72 69 61 6C 73 2D 30 2E  cpp-tutorials-0.
    39 2E 32 2F 6C 69 73 74 65 6E 65 72 2F 6C 69 73  9.2/listener/lis
    74 65 6E 65 72 2E 63 70 70 0F 00 00 00 63 68 61  tener.cpp....cha
    74 74 65 72 43 61 6C 6C 62 61 63 6B 26 00 00 00  tterCallback&...
    01 00 00 00 07 00 00 00 2F 72 6F 73 6F 75 74     ......../rosout

and the next one referring also to '/listener'::

    AB 00 00 00 01 00 00 00 7D 81 03 5F 00 54 42 14  ........}.._.TB.
    00 00 00 00 02 09 00 00 00 2F 6C 69 73 74 65 6E  ........./listen
    65 72 18 00 00 00 49 20 68 65 61 72 64 3A 20 5B  er....I heard: [
    68 65 6C 6C 6F 20 77 6F 72 6C 64 20 34 5D 47 00  hello world 4]G.
    00 00 2F 74 6D 70 2F 62 69 6E 61 72 79 64 65 62  ../tmp/binarydeb
    2F 72 6F 73 2D 6D 65 6C 6F 64 69 63 2D 72 6F 73  /ros-melodic-ros
    63 70 70 2D 74 75 74 6F 72 69 61 6C 73 2D 30 2E  cpp-tutorials-0.
    39 2E 32 2F 6C 69 73 74 65 6E 65 72 2F 6C 69 73  9.2/listener/lis
    74 65 6E 65 72 2E 63 70 70 0F 00 00 00 63 68 61  tener.cpp....cha
    74 74 65 72 43 61 6C 6C 62 61 63 6B 26 00 00 00  tterCallback&...
    01 00 00 00 07 00 00 00 2F 72 6F 73 6F 75 74     ......../rosout

NOTE: not all packages are disgested appropriately and some
fields need to be better understood (e.g. signature) for
appropriate building.

NOTE 2: Needs further research to convert Padding at the end to
something that makes sense.

rr