ndnputchunks
============

Synopsis
--------

**ndnputchunks** [options] *name*

Description
-----------

:program:`ndnputchunks` is a producer program that reads a file from the standard input, and makes it available as NDN Data segments.

It appends version and segment number components to the specified name, according to the `NDN naming conventions`_.

.. _NDN naming conventions: http://named-data.net/publications/techreports/ndn-tr-22-ndn-memo-naming-conventions/

Options
-------

.. option:: -h, --help

    Print help and exit.

.. option:: -f, --freshness MILLISECS

    FreshnessPeriod of the published Data packets, in milliseconds. Default = 10000 [ms].

.. option:: -p, --print-data-version

    Print version of the published Data to the standard output.

.. option:: -s, --size BYTES

    Maximum chunk size, in bytes. Default = 4400 [bytes].

.. option:: -S, --signing-info STRING

    Specify the parameters used to sign the Data packet. If omitted, the default key of
    the default identity is used. The general syntax is ``<scheme>:<name>``. The most
    common supported combinations are as follows:

    * Sign with the default certificate of the default key of an identity: ``id:/<my-identity>``.
    * Sign with the default certificate of a specific key: ``key:/<my-identity>/ksk-1``.
    * Sign with a specific certificate: ``cert:/<my-identity>/KEY/ksk-1/ID-CERT/%FD%01``.
    * Sign with a SHA-256 digest: ``id:/localhost/identity/digest-sha256``. Note that this
      is only a hash function, not a real signature, but it can significantly speed up
      packet signing operations.

.. option:: -q, --quiet

    Turn off all non-error output.

.. option:: -v, --verbose

    Produce verbose output.

.. option:: -V, --version

    Print program version and exit.

Example
-------

The following command will publish the text of the GPL-3 license under the `/localhost/demo/gpl3`
prefix::

    ndnputchunks /localhost/demo/gpl3 < /usr/share/common-licenses/GPL-3

To find the published version you have to start ndnputchunks with the `-p` command line option,
for example::

    ndnputchunks -p /localhost/demo/gpl3 < /usr/share/common-licenses/GPL-3

This command will print the published version to the standard output.

To publish Data with a specific version, you must append a version component to the end of the
prefix. The version component must follow the aforementioned NDN naming conventions.
For example, the following command will publish the version `%FD%00%00%01Qc%CF%17v` of the
`/localhost/demo/gpl3` prefix::

    ndnputchunks /localhost/demo/gpl3/%FD%00%00%01Qc%CF%17v < /usr/share/common-licenses/GPL-3

If the version component is not valid, a new well-formed version will be generated and appended
to the supplied NDN name.