More text and useragent doc
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@ -241,6 +241,47 @@ Bitmessage's 8-bit bytes.
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Pubkey bitfield features
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Pubkey bitfield features
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""""""""""""""""""""""""
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""""""""""""""""""""""""
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.. list-table::
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:header-rows: 1
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:widths: auto
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* - Bit
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- Name
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- Description
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* - 0
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- undefined
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- The most significant bit at the beginning of the structure. Undefined
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* - 1
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- undefined
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- The next most significant bit. Undefined
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* - ...
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- ...
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- ...
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* - 27
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- onion_router
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- (**Proposal**) Node can be used to onion-route messages. In theory any
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node can onion route, but since it requires more resources, they may have
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the functionality disabled. This field will be used to indicate that the
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node is willing to do this.
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* - 28
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- forward_secrecy
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- (**Proposal**) Receiving node supports a forward secrecy encryption
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extension. The exact design is pending.
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* - 29
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- chat
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- (**Proposal**) Address if for chatting rather than messaging.
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* - 30
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- include_destination
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- (**Proposal**) Receiving node expects that the RIPE hash encoded in their
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address preceedes the encrypted message data of msg messages bound for
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them.
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.. note:: since hardly anyone implements this, this will be redesigned as
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`simple recipient verification <https://github.com/Bitmessage/PyBitmessage/pull/808#issuecomment-170189856>`_
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* - 31
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- does_ack
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- If true, the receiving node does send acknowledgements (rather than
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dropping them).
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.. _msg-types:
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.. _msg-types:
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@ -256,6 +297,81 @@ When a node creates an outgoing connection, it will immediately advertise its
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version. The remote node will respond with its version. No futher communication
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version. The remote node will respond with its version. No futher communication
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is possible until both peers have exchanged their version.
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is possible until both peers have exchanged their version.
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.. list-table:: Payload
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:header-rows: 1
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:widths: auto
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* - Field Size
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- Description
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- Data type
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- Comments
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* - 4
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- version
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- int32_t
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- Identifies protocol version being used by the node. Should equal 3.
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Nodes should disconnect if the remote node's version is lower but
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continue with the connection if it is higher.
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* - 8
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- services
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- uint64_t
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- bitfield of features to be enabled for this connection
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* - 8
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- timestamp
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- int64_t
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- standard UNIX timestamp in seconds
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* - 26
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- addr_recv
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- net_addr
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- The network address of the node receiving this message (not including the
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time or stream number)
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* - 26
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- addr_from
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- net_addr
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- The network address of the node emitting this message (not including the
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time or stream number and the ip itself is ignored by the receiver)
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* - 8
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- nonce
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- uint64_t
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- Random nonce used to detect connections to self.
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* - 1+
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- user_agent
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- var_str
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- :doc:`useragent` (0x00 if string is 0 bytes long). Sending nodes must not
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include a user_agent longer than 5000 bytes.
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* - 1+
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- stream_numbers
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- var_int_list
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- The stream numbers that the emitting node is interested in. Sending nodes
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must not include more than 160000 stream numbers.
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A "verack" packet shall be sent if the version packet was accepted. Once you
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have sent and received a verack messages with the remote node, send an addr
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message advertising up to 1000 peers of which you are aware, and one or more
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inv messages advertising all of the valid objects of which you are aware.
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.. list-table:: The following services are currently assigned
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:header-rows: 1
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:widths: auto
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* - Value
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- Name
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- Description
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* - 1
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- NODE_NETWORK
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- This is a normal network node.
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* - 2
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- NODE_SSL
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- This node supports SSL/TLS in the current connect (python < 2.7.9 only
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supports a SSL client, so in that case it would only have this on when
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the connection is a client).
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* - 3
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- NODE_POW
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- (**Proposal**) This node may do PoW on behalf of some its peers (PoW
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offloading/delegating), but it doesn't have to. Clients may have to meet
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additional requirements (e.g. TLS authentication)
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* - 4
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- NODE_DANDELION
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- Node supports `dandelion <https://github.com/gfanti/bips/blob/master/bip-dandelion.mediawiki>`_
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verack
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verack
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^^^^^^
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^^^^^^
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53
docs/useragent.rst
Normal file
53
docs/useragent.rst
Normal file
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@ -0,0 +1,53 @@
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User Agent
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==========
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Bitmessage user agents are a modified browser user agent with more structure
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to aid parsers and provide some coherence. The user agent strings are arranged
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in a stack with the most underlying software listed first.
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Basic format::
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/Name:Version/Name:Version/.../
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Example::
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/PyBitmessage:0.2.2/Corporate Mail System:0.8/
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/Surdo:5.64/surdo-qt:0.4/
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The version numbers are not defined to any strict format, although this guide
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recommends:
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* Version numbers in the form of Major.Minor.Revision (2.6.41)
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* Repository builds using a date in the format of YYYYMMDD (20110128)
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For git repository builds, implementations are free to use the git commitish.
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However the issue lies in that it is not immediately obvious without the
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repository which version preceeds another. For this reason, we lightly
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recommend dates in the format specified above, although this is by no means
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a requirement.
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Optional ``-r1``, ``-r2``, ... can be appended to user agent version numbers.
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This is another light recommendation, but not a requirement. Implementations
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are free to specify version numbers in whatever format needed insofar as it
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does not include ``(``, ``)``, ``:`` or ``/`` to interfere with the user agent
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syntax.
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An optional comments field after the version number is also allowed. Comments
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should be delimited by parenthesis ``(...)``. The contents of comments is
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entirely implementation defined although this document recommends the use of
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semi-colons ``;`` as a delimiter between pieces of information.
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Example::
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/cBitmessage:0.2(iPad; U; CPU OS 3_2_1)/AndroidBuild:0.8/
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Reserved symbols are therefore: ``/ : ( )``
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They should not be misused beyond what is specified in this section.
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``/``
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separates the code-stack
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``:``
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specifies the implementation version of the particular stack
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``( and )``
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delimits a comment which optionally separates data using ``;``
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