Macros

.. macro:: NGHTTP2_VERSION

Version number of the nghttp2 library release

.. macro:: NGHTTP2_VERSION_NUM

Numerical representation of the version number of the nghttp2 library
release. This is a 24 bit number with 8 bits for major number, 8 bits
for minor and 8 bits for patch. Version 1.2.3 becomes 0x010203.

.. macro:: NGHTTP2_PROTO_VERSION_ID

The protocol version identification string of this library
supports.  This identifier is used if HTTP/2 is used over TLS.

.. macro:: NGHTTP2_PROTO_VERSION_ID_LEN

The length of :macro:`NGHTTP2_PROTO_VERSION_ID`.

.. macro:: NGHTTP2_PROTO_ALPN

The serialized form of ALPN protocol identifier this library
supports.  Notice that first byte is the length of following
protocol identifier.  This is the same wire format of `TLS ALPN
extension <https://tools.ietf.org/html/rfc7301>`_.  This is useful
to process incoming ALPN tokens in wire format.

.. macro:: NGHTTP2_PROTO_ALPN_LEN

The length of :macro:`NGHTTP2_PROTO_ALPN`.

.. macro:: NGHTTP2_CLEARTEXT_PROTO_VERSION_ID

The protocol version identification string of this library
supports.  This identifier is used if HTTP/2 is used over cleartext
TCP.

.. macro:: NGHTTP2_CLEARTEXT_PROTO_VERSION_ID_LEN

The length of :macro:`NGHTTP2_CLEARTEXT_PROTO_VERSION_ID`.

.. macro:: NGHTTP2_VERSION_AGE

The age of :type:`nghttp2_info`

.. macro:: NGHTTP2_DEFAULT_WEIGHT

.. warning::

  Deprecated.  :rfc:`7540` priorities are deprecated by
  :rfc:`9113`.  Consider migrating to :rfc:`9218` extensible
  prioritization scheme.

The default weight of stream dependency.

.. macro:: NGHTTP2_MAX_WEIGHT

.. warning::

  Deprecated.  :rfc:`7540` priorities are deprecated by
  :rfc:`9113`.  Consider migrating to :rfc:`9218` extensible
  prioritization scheme.

The maximum weight of stream dependency.

.. macro:: NGHTTP2_MIN_WEIGHT

.. warning::

  Deprecated.  :rfc:`7540` priorities are deprecated by
  :rfc:`9113`.  Consider migrating to :rfc:`9218` extensible
  prioritization scheme.

The minimum weight of stream dependency.

.. macro:: NGHTTP2_MAX_WINDOW_SIZE

The maximum window size

.. macro:: NGHTTP2_INITIAL_WINDOW_SIZE

The initial window size for stream level flow control.

.. macro:: NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE

The initial window size for connection level flow control.

.. macro:: NGHTTP2_DEFAULT_HEADER_TABLE_SIZE

The default header table size.

.. macro:: NGHTTP2_CLIENT_MAGIC

The client magic string, which is the first 24 bytes byte string of
client connection preface.

.. macro:: NGHTTP2_CLIENT_MAGIC_LEN

The length of :macro:`NGHTTP2_CLIENT_MAGIC`.

.. macro:: NGHTTP2_DEFAULT_MAX_SETTINGS

The default max number of settings per SETTINGS frame

.. macro:: NGHTTP2_INITIAL_MAX_CONCURRENT_STREAMS

.. warning::

  Deprecated.  The initial max concurrent streams is 0xffffffffu.

Default maximum number of incoming concurrent streams.  Use
`nghttp2_submit_settings()` with
:enum:`nghttp2_settings_id.NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS`
to change the maximum number of incoming concurrent streams.

.. note::

  The maximum number of outgoing concurrent streams is 100 by
  default.

.. macro:: NGHTTP2_EXTPRI_DEFAULT_URGENCY

:macro:`NGHTTP2_EXTPRI_DEFAULT_URGENCY` is the default urgency
level for :rfc:`9218` extensible priorities.

.. macro:: NGHTTP2_EXTPRI_URGENCY_HIGH

:macro:`NGHTTP2_EXTPRI_URGENCY_HIGH` is the highest urgency level
for :rfc:`9218` extensible priorities.

.. macro:: NGHTTP2_EXTPRI_URGENCY_LOW

:macro:`NGHTTP2_EXTPRI_URGENCY_LOW` is the lowest urgency level for
:rfc:`9218` extensible priorities.

.. macro:: NGHTTP2_EXTPRI_URGENCY_LEVELS

:macro:`NGHTTP2_EXTPRI_URGENCY_LEVELS` is the number of urgency
levels for :rfc:`9218` extensible priorities.