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16c5e08197
The UDP "Free text" message comamnd should not expose implementation differences between tab one and tab two. The "send next" capability is not available on tab two so use of it has been removed from the UDP interface. The ability to trigger the immediate (or in next Tx period if the current period is Rx) sending of the current free text message has been added to the UDP interface. This is done by sending a "Free text" UDP message containing an empty text message with the "Send" flag set. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@5725 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
306 lines
12 KiB
C++
306 lines
12 KiB
C++
#ifndef NETWORK_MESSAGE_HPP__
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#define NETWORK_MESSAGE_HPP__
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/*
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* WSJT-X Message Formats
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* ======================
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*
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* All messages are written or read using the QDataStream derivatives
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* defined below, note that we are using the default for floating
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* point precision which means all are double precision i.e. 64-bit
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* IEEE format.
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*
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* Message is big endian format
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*
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* Header format:
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*
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* 32-bit unsigned integer magic number 0xadbccbda
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* 32-bit unsigned integer schema number
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*
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* Payload format:
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*
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* As per the QDataStream format, see below for version used and
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* here:
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*
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* http://doc.qt.io/qt-5/datastreamformat.html
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*
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* for the serialization details for each type, at the time of
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* writing the above document is for Qt_5_0 format which is buggy
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* so we use Qt_5_2 format, differences are:
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*
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* QDateTime:
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* QDate qint64 Julian day number
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* QTime quint32 Milli-seconds since midnight
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* timespec quint8 0=local, 1=UTC, 2=Offset from UTC
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* (seconds)
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* 3=time zone
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* offset qint32 only present if timespec=2
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* timezone several-fields only present if timespec=3
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*
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* we will avoid using QDateTime fields with time zones for simplicity.
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*
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* Type utf8 is a utf-8 byte string formatted as a QByteArray for
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* serialization purposes (currently a quint32 size followed by size
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* bytes, no terminator is present or counted).
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*
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* The QDataStream format document linked above is not complete for
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* the QByteArray serialization format, it is similar to the QString
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* serialization format in that it differentiates between empty
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* strings and null strings. Empty strings have a length of zero
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* whereas null strings have a length field of 0xffffffff.
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*
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* Schema Version 1:
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* -----------------
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*
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* Message Direction Value Type
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* ------------- --------- ---------------------- -----------
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* Heartbeat Out 0 quint32
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* Id (unique key) utf8
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*
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* The heartbeat message is sent on a periodic basis every
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* NetworkMessage::pulse seconds (see below). This message is
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* intended to be used by server to detect the presence of a client
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* and also the unexpected disappearance of a client. The
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* message_aggregator reference server does just that.
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*
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*
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* Status Out 1 quint32
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* Id (unique key) utf8
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* Dial Frequency (Hz) quint64
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* Mode utf8
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* DX call utf8
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* Report utf8
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* Tx Mode utf8
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* Tx Enabled bool
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* Transmitting bool
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*
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* WSJT-X sends this status message when various internal state
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* changes to allow the server to track the relevant state of each
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* client without the need for polling commands. The current state
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* changes that generate status messages are:
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*
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* Application start up,
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* "Enable Tx" button status changes,
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* Dial frequency changes,
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* Changes to the "DX Call" field,
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* Operating mode changes,
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* Transmit mode changed (in dual JT9+JT65 mode),
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* Changes to the "Rpt" spinner,
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* After an old decodes replay sequence (see Replay below),
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* When switching between Tx and Rx mode.
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*
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*
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* Decode Out 2 quint32
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* Id (unique key) utf8
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* New bool
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* Time QTime
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* snr qint32
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* Delta time (S) float (serialized as double)
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* Delta frequency (Hz) quint32
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* Mode utf8
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* Message utf8
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*
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* The decode message is send when a new decode is completed, in
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* this case the 'New' field is true. It is also used in response
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* to a "Replay" message where each old decode in the "Band
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* activity" window, that has not been erased, is sent in order
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* as a one of these messages with the 'New' field set to
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* false. See the "Replay" message below for details of usage.
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*
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*
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* Clear Out 3 quint32
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* Id (unique key) utf8
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*
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* This message is send when all prior "Decode" messages in the
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* "Band activity" window have been discarded and therefore are
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* no long available for actioning with a "Reply" message. It is
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* sent when the user erases the "Band activity" window and when
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* WSJT-X closes down normally. The server should discard all
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* decode messages upon receipt of this message.
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*
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*
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* Reply In 4 quint32
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* Id (target unique key) utf8
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* Time QTime
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* snr qint32
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* Delta time (S) float (serialized as double)
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* Delta frequency (Hz) quint32
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* Mode utf8
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* Message utf8
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*
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* In order for a server to provide a useful cooperative service
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* to WSJT-X it is possible for it to initiate a QSO by sending
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* this message to a client. WSJT-X filters this message and only
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* acts upon it if the message exactly describes a prior decode
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* and that decode is a CQ or QRZ message. The action taken is
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* exactly equivalent to the user double clicking the message in
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* the "Band activity" window. The intent of this message is for
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* servers to be able to provide an advanced look up of potential
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* QSO partners, for example determining if they have been worked
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* before or if working them may advance some objective like
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* award progress. The intention is not to provide a secondary
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* user interface for WSJT-X, it is expected that after QSO
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* initiation the rest of the QSO is carried out manually using
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* the normal WSJT-X user interface.
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*
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*
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* QSO Logged Out 5 quint32
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* Id (unique key) utf8
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* Date & Time QDateTime
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* DX call utf8
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* DX grid utf8
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* Dial frequency (Hz) quint64
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* Mode utf8
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* Report send utf8
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* Report received utf8
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* Tx power utf8
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* Comments utf8
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* Name utf8
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*
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* The QSO logged message is sent to the server(s) when the
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* WSJT-X user accepts the "Log QSO" dialog by clicking the "OK"
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* button.
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*
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*
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* Close Out 6 quint32
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* Id (unique key) utf8
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*
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* Close is sent by a client immediately prior to it shutting
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* down gracefully.
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*
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*
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* Replay In 7 quint32
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* Id (unique key) utf8
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*
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* When a server starts it may be useful for it to determine the
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* state of preexisting clients. Sending this message to each
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* client as it is discovered will cause that client (WSJT-X) to
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* send a "Decode" message for each decode currently in its "Band
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* activity" window. Each "Decode" message sent will have the
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* "New" flag set to false so that they can be distinguished from
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* new decodes. After all the old decodes have been broadcast a
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* "Status" message is also broadcast. If the server wishes to
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* determine the status of a newly discovered client; this
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* message should be used.
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*
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*
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* Halt Tx In 8
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* Id (unique key) utf8
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* Auto Tx Only bool
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*
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* The server may stop a client from transmitting messages either
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* immediately or at the end of the current transmission period
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* using this message.
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*
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*
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* Free Text In 9
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* Id (unique key) utf8
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* Text utf8
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* Send bool
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*
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* This message allows the server to set the current free text
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* message content. Sending this message with a non-empty "Text"
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* field is equivalent to typing a new message (old contents are
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* discarded) in to the WSJT-X free text message field or "Tx5"
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* field (both are updated) and if the "Send" flag is set then
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* clicking the "Now" radio button for the "Tx5" field if tab one
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* is current or clicking the "Free msg" radio button if tab two
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* is current.
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*
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* It is the responsibility of the sender to limit the length of
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* the message text and to limit it to legal message
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* characters. Despite this, it may be difficult for the sender
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* to determine the maximum message length without reimplementing
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* the complete message encoding protocol. Because of this is may
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* be better to allow any reasonable message length and to let
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* the WSJT-X application encode and possibly truncate the actual
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* on-air message.
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*
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* If the message text is empty the meaning of the message is
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* refined to send the current free text unchanged when the
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* "Send" flag is set or to clear the current free text when the
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* "Send" flag is unset. Note that this API does not include a
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* command to determine the contents of the current free text
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* message.
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*/
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#include <QDataStream>
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#include "pimpl_h.hpp"
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class QIODevice;
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class QByteArray;
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class QString;
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namespace NetworkMessage
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{
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// NEVER DELETE MESSAGE TYPES
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enum Type
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{
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Heartbeat,
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Status,
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Decode,
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Clear,
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Reply,
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QSOLogged,
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Close,
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Replay,
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HaltTx,
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FreeText,
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maximum_message_type_ // ONLY add new message types
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// immediately before here
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};
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quint32 constexpr pulse {15}; // seconds
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//
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// NetworkMessage::Build - build a message containing serialized Qt types
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//
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class Builder
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: public QDataStream
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{
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public:
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static quint32 constexpr magic {0xadbccbda}; // never change this
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// increment this if a newer Qt schema is required and add decode
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// logic to InputMessageStream below
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static quint32 constexpr schema_number {2};
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explicit Builder (QIODevice *, Type, QString const& id);
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explicit Builder (QByteArray *, Type, QString const& id);
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Builder (Builder const&) = delete;
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Builder& operator = (Builder const&) = delete;
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private:
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void common_initialization (Type type, QString const& id);
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};
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//
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// NetworkMessage::Reader - read a message containing serialized Qt types
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//
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// Message is as per NetworkMessage::Builder above, the schema()
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// member may be used to determine the schema of the original
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// message.
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//
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class Reader
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: public QDataStream
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{
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public:
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explicit Reader (QIODevice *);
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explicit Reader (QByteArray const&);
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Reader (Reader const&) = delete;
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Reader& operator = (Reader const&) = delete;
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~Reader ();
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quint32 schema () const;
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Type type () const;
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QString id () const;
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private:
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class impl;
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pimpl<impl> m_;
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};
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}
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#endif
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