MTH

[nncp.git] / doc / news.texi

@node News
@unnumbered News

See also this page @ref{Новости, on russian}.

@node Release 7.0.0
@section Release 7.0.0
@itemize

@item
Merkle Tree-based Hashing with BLAKE3 (MTH) is used instead of BLAKE2b.
Because of that, there are backward @strong{incompatible} changes of
encrypted files (everything laying in the spool directory) and
@file{.meta} files of chunked transfer.

Current implementation is far from being optimal: it lacks
parallelizable calculations and has higher memory consumption: nearly
512 KiB for each 1 GiB of file's data. Future performance and memory
size optimizations should not lead to packet's format change. But it is
still several times faster than BLAKE2b.

@item
Resumed online downloads, because of MTH, require reading only of the
preceding part of file, not the whole one as was before.

@item
@command{nncp-hash} utility appeared for calculating file's MTH hash.

@item
MultiCast Discovery uses
@verb{|ff02::4e4e:4350|} address instead of @verb{|ff02::1|}.

@item
Updated dependencies.

@end itemize

@node Release 6.6.0
@section Release 6.6.0
@itemize

@item
@command{nncp-daemon}, @command{nncp-call} and @command{nncp-caller}
commands wait for all background checksummers completion after
connection is finished.

@item
Added possibility of address determining through multicast announcement
in local area network, so called MCD (MultiCast Discovery).

@end itemize

@node Release 6.5.0
@section Release 6.5.0
@itemize

@item
Fixed segfault in @command{nncp-daemon} when SP handshake did not succeed.

@item
Fixed possible bad return code ignoring in automatic tosser.

@item
Fixed race during file descriptors closing when online protocol call is
finished, that could lead to write error of received packet fragment.

@item
Kill all packet transmission progress bars in @command{nncp-daemon},
@command{nncp-call} and @command{nncp-caller} when call is finished.

@end itemize

@node Release 6.4.0
@section Release 6.4.0
@itemize

@item
Fixed possible race in online protocol, that lead to panic.

@end itemize

@node Release 6.3.0
@section Release 6.3.0
@itemize

@item
Fixed possible panic while showing progress during online protocol.

@end itemize

@node Release 6.2.1
@section Release 6.2.1
@itemize

@item
Three places in logs contained excess @code{%s}.

@end itemize

@node Release 6.2.0
@section Release 6.2.0
@itemize

@item
Returned @command{nncp-caller}'s @option{-autotoss*} options workability.

@item
Yet another logging refactoring and simplification.
Should be no visible differences to the end user.

@end itemize

@node Release 6.1.0
@section Release 6.1.0
@itemize

@item
Optimization: most commands do not keep opened file descriptors now.
Previously you can exceed maximal number of opened files if you have got
many packets in the spool directory.

@item
Optimization: do not close file descriptor of the file we download
online. Previously each chunk lead to expensive open/close calls.

@item
Online downloaded files are saved with @file{.nock} (non-checksummed)
suffix, waiting either for @command{nncp-check}, or online daemons to
perform integrity check.

@item
Optimization: files, that are not resumed, are checksummed immediately
during the online download, skipping @file{.nock}-intermediate step.

@item
Ability to store encrypted packet's header in @file{.hdr} file, close to
the packet itself. That can greatly increase performance of packets
listing on filesystems with big block's size.

@end itemize

@node Release 6.0.0
@section Release 6.0.0
@itemize

@item
Log uses human readable and easy machine parseable
@url{https://www.gnu.org/software/recutils/, recfile} format for the
records, instead of structured RFC 3339 lines. Old logs are not readable
by @command{nncp-log} anymore.

@item
@option{-autotoss*} option workability with @command{nncp-daemon}'s
@option{-inetd} mode.

@item
Call's @option{when-tx-exists} allows to make a call only when outbound
packets exists. Combined with seconds-aware cron expression that can be
used as some kind of auto dialler.

@item
@command{nncp-cronexpr} command allows you to check validity and
expectations of specified cron expression.

@end itemize

@node Release 5.6.0
@section Release 5.6.0
@itemize

@item
@option{-autotoss*} option runs tosser not after the call, but every
second while it is active.

@item
@option{autotoss}, @option{autotoss-doseen},
@option{autotoss-nofile}, @option{autotoss-nofreq},
@option{autotoss-noexec}, @option{autotoss-notrns} options available in
@option{calls} configuration section. You can configure per-call
automatic tosser options.

@item
Use vendoring, instead of @env{GOPATH} overriding during tarball
installation, because current minimal Go's version is 1.12 and it
supports modules.

@end itemize

@node Release 5.5.1
@section Release 5.5.1
@itemize

@item
Respect for @env{BINDIR}, @env{INFODIR} and @env{DOCDIR} environment
variables in @file{config} during installation.

@end itemize

@node Release 5.5.0
@section Release 5.5.0
@itemize

@item
Bugfixes in @command{nncp-call(er)}/@command{nncp-daemon},
@command{nncp-bundle} and @command{nncp-stat}.

@item
@command{nncp-rm} has @option{-dryrun} and @option{-older} options now.

@item
@command{nncp-exec} has @option{-use-tmp} and @option{-nocompress}
options now. Uncompressed packets are not compatible with previous NNCP
versions.

@item
@command{nncp-call}, @command{nncp-caller} and @command{nncp-daemon} commands
have @option{-autotoss*} options for running tosser after call is ended.

@item
Updated dependencies. Minimal required Go version is 1.12.

@end itemize

@node Release 5.4.1
@section Release 5.4.1
@itemize

@item
Fixed @code{SENDMAIL} variable usage during the build.

@end itemize

@node Release 5.4.0
@section Release 5.4.0
@itemize

@item
Updated dependencies.

@item
Build system is moved from Makefiles to @url{http://cr.yp.to/redo.html, redo}.
This should not influence package maintainers, because minimal @command{redo}
implementation is included in tarball.

@end itemize

@node Release 5.3.3
@section Release 5.3.3
@itemize

@item
More various error checks.

@item
Updated dependencies.

@end itemize

@node Release 5.3.2
@section Release 5.3.2
@itemize

@item
Fixed incorrect logic of @option{onlinedeadline} timeout, where
connection won't take into account incoming packets events and will
forcefully disconnect.

@end itemize

@node Release 5.3.1
@section Release 5.3.1
@itemize

@item
Fixed @option{onlinedeadline} workability with call addresses that use
external commands (@verb{#"|somecmd"#}).

@item
@command{nncp-stat} has @option{-pkt} option displaying information
about each packet in the spool.

@end itemize

@node Release 5.3.0
@section Release 5.3.0
@itemize

@item
Progress messages contain prefix, describing the running action.

@item
Fixed not occurring handshake messages padding.

@item
Finish all SP protocol related goroutines, less memory leak.

@item
SP protocol generates less socket write calls, thus generating less TCP
packets.

@item
Check @option{onlinedeadline} and @option{maxonlinetime} options every
second, independently from socket reads (up to 10 seconds).

@item
Once per minute, if no other traffic exists, PING packets are sent in
SP-connection. That allows faster determining of connection unworkability.

@item
@command{nncp-toss} uses lock-file to prevent simultaneous tossing.

@end itemize

@node Release 5.2.1
@section Release 5.2.1
@itemize

@item
Fixed SP protocol error handling, sometimes causing program panic.

@end itemize

@node Release 5.2.0
@section Release 5.2.0
@itemize

@item
Most commands by default show oneline operations progress.
@option{-progress}, @option{-noprogress} command line options,
@option{noprogress} configuration file option appeared.

@item
Fixed incorrect @command{nncp-check} command return code, that returned
bad code when everything is good.

@item
Free disk space check during @command{nncp-bundle -rx} call.

@end itemize

@node Release 5.1.2
@section Release 5.1.2
@itemize

@item
@strong{Critical} vulnerability: remote peers authentication could lead
to incorrect identification of remote side, allowing foreign encrypted
packets downloading.

@item
Bugfix: private and public Noise keys were swapped in newly created
configuration files, that lead to inability to authenticate online peers.

@item
Explicit directories fsync-ing for guaranteed files renaming.

@end itemize

@node Release 5.1.1
@section Release 5.1.1
@itemize

@item
Fixed workability of @command{nncp-file} with @option{-chunked 0} option.

@end itemize

@node Release 5.1.0
@section Release 5.1.0
@itemize

@item
@command{nncp-file} can send directories, automatically creating pax
archive on the fly.

@item
Free disk space is checked during outbound packets creation.

@item
@option{freq}, @option{freqminsize}, @option{freqchunked} configuration
file options replaced with the structure:
@option{freq: @{path: ..., minsize: ..., chunked: ...@}}.

@item
Added @option{freq.maxsize} configuration file option, forbidding of
freq sending larger than specified size.

@item
Ability to notify about successfully executed commands (exec) with
@option{notify.exec} configuration file option.

@end itemize

@node Release 5.0.0
@section Release 5.0.0
@itemize

@item
@strong{Incompatible} configuration file format change: YAML is
replaced with Hjson, due to its simplicity, without noticeable lack
of either functionality or convenience.

@item
@strong{Incompatible} plain packet format changes. Older versions are
not supported. @code{zlib} compression is replaced with
@code{Zstandard}, due to its speed and efficiency, despite library
version is not mature enough.

@item
Ability to call remote nodes via pipe call of external command, not only
through TCP.

@item
@command{nncp-cfgnew} generates configuration file with many
comments. @option{-nocomments} option can be used for an old
behaviour.

@item
Duplicate filenames have @file{.CTR} suffix, instead of @file{CTR}, to
avoid possible collisions with @file{.nncp.chunkCTR}.

@item
Ability to override process umask through configuration file option.

@item
Files and directories are created with 666/777 permissions by default,
allowing control with @command{umask}.

@item
Updated dependencies.

@item
Full usage of go modules for dependencies management
(@code{go.cypherpunks.ru/nncp/v5} namespace is used).

@item
Forbid any later GNU GPL version autousage
(project's licence now is GNU GPLv3-only).

@end itemize

@node Release 4.1
@section Release 4.1
@itemize
@item Workability on GNU/Linux systems and Go 1.10 is fixed.
@end itemize

@node Release 4.0
@section Release 4.0
@itemize

@item
@strong{Incompatible} encrypted and eblob packet format change: AEAD
encryption mode with 128 KiB blocks is used now, because previously
@command{nncp-toss} did not verify encrypted packet's MAC before feeding
decrypted data to external command. Older versions are not supported.

@item
Available free space checking before copying in @command{nncp-xfer},
@command{nncp-daemon}, @command{nncp-call(er)}.

@item
@command{nncp-call} has ability only to list packets on remote node,
without their transmission.

@item
@command{nncp-call} has ability to transfer only specified packets.

@item
Workability of @option{xxrate} preference in @option{calls}
configuration file section.

@item
Dependant libraries are updated.

@item
Minor bugfixes.

@item
Begin using of @code{go.mod} subsystem.

@end itemize

@node Release 3.4
@section Release 3.4
@itemize
@item @command{nncp-daemon} can be run as @command{inetd}-service.
@end itemize

@node Release 3.3
@section Release 3.3
@itemize

@item
@command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller} check
if @file{.seen} exists and treat it like file was already downloaded.
Possibly it was transferred out-of-bound and remote side needs to be
notifier about that.

@item
If higher priority packet is spooled, then @command{nncp-daemon} will
queue its sending first, interrupting lower priority transmissions.

@item
Simple packet rate limiter added to online-related tools
(@command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller}).

@item
Ability to specify niceness with symbolic notation:
@verb{|NORMAL|}, @verb{|BULK+10|}, @verb{|PRIORITY-5|}, etc.

@item
Changed default niceness levels:
for @command{nncp-exec} from 64 to 96,
for @command{nncp-freq} from 64 to 160,
for @command{nncp-file} from 196 to 224.

@end itemize

@node Release 3.2
@section Release 3.2
@itemize
@item
@strong{Incompatible} @emph{bundle} archive format changes and
@command{nncp-bundle} workability with Go 1.10+. Bundles must be
valid tar archives, but Go 1.9 made them invalid because of long paths
inside. NNCP accidentally was dependant on that bug. Explicit adding of
@file{NNCP/} directory in archive restores workability with valid tar
archives.
@end itemize

@node Release 3.1
@section Release 3.1
@itemize
@item
Ability to disable relaying at all using @verb{|-via -|} command line option.
@end itemize

@node Release 3.0
@section Release 3.0
@itemize

@item
@strong{Incompatible} plain packet format changes. Older versions are
not supported.

@item
Ability to queue remote command execution, by configuring @option{exec}
option in configuration file and using @command{nncp-exec} command:
    @itemize
    @item
    @command{nncp-mail} command is replaced with more flexible
    @command{nncp-exec}. Instead of @verb{|nncp-mail NODE RECIPIENT|}
    you must use @verb{|nncp-exec NODE sendmail RECIPIENT|}.
    @item
    @option{sendmail} configuration file option is replaced with
    @option{exec}. @verb{|sendmail: [...]|} must be replaced with
    @verb{|exec: sendmail: [...]|}.
    @end itemize

@item
Ability to override @option{via} configuration option for destination
node via @option{-via} command line option for following commands:
@command{nncp-file}, @command{nncp-freq}, @command{nncp-exec}.

@item
Chunked files, having size less than specified chunk size, will be sent
as an ordinary single file.

@item
Exec commands are invoked with additional @env{NNCP_NICE} and
@env{NNCP_SELF} environment variables.

@item
Files, that are sent as a reply to freq, have niceness level taken from
the freq packet. You can set desired niceness during @command{nncp-freq}
invocation using @option{-replynice} option.

@item
@command{nncp-toss} command can ignore specified packet types during
processing: @option{-nofile}, @option{-nofreq}, @option{-noexec},
@option{-notrns}.

@item
@command{nncp-file} command uses
@option{FreqMinSize}/@option{FreqChunked} configuration file options
for @option{-minsize}/@option{-chunked} by default. You can turn this
off by specifying zero value.

@end itemize

@node Release 2.0
@section Release 2.0
@itemize

@item
@strong{Incompatible} encrypted/eblob packet format changes. Older
versions are not supported.

@item
Twofish encryption algorithm is replaced with ChaCha20. It is much more
faster. One cryptographic primitive less.

@item
HKDF-BLAKE2b-256 KDF algorithm is replaced with BLAKE2Xb XOF. Yet
another cryptographic primitive less (assuming that BLAKE2X is nearly
identical to BLAKE2).

@end itemize

@node Release 1.0
@section Release 1.0
@itemize

@item
@strong{Incompatible} encrypted packet format changes. Older versions
are not supported.

@item
@command{nncp-bundle} command can either create stream of encrypted
packets, or digest it. It is useful when dealing with
@code{stdin}/@code{stdout} based transmission methods (like writing to
CD-ROM without intermediate prepared ISO image and working with tape
drives).

@item
@command{nncp-toss} is able to create @file{.seen} files preventing
duplicate packets receiving.

@item
Single background checksum verifier worker is allowed in
@command{nncp-call}. This is helpful when thousands of small inbound
packets could create many goroutines.

@item
Ability to override path to spool directory and logfile through either
command line argument, or environment variable.

@item
@command{nncp-rm} is able to delete outbound/inbound, @file{.seen},
@file{.part}, @file{.lock} and temporary files.

@end itemize

@node Release 0.12
@section Release 0.12
@itemize
@item Sendmail command is called with @env{NNCP_SENDER} environment variable.
@end itemize

@node Release 0.11
@section Release 0.11
@itemize
@item @command{nncp-stat}'s command output is sorted by node name.
@end itemize

@node Release 0.10
@section Release 0.10
@itemize
@item
@command{nncp-freq}'s @file{DST} argument is optional now. Last
@file{SRC} path's element will be used by default.
@end itemize

@node Release 0.9
@section Release 0.9
@itemize
@item
Fix @option{-rx}/@option{-tx} arguments processing in
@command{nncp-call} command. They were ignored.
@end itemize

@node Release 0.8
@section Release 0.8
@itemize
@item
Little bugfix in @command{nncp-file} command, where @option{-minsize}
option for unchunked transfer was not in KiBs, but in bytes.
@end itemize

@node Release 0.7
@section Release 0.7
@itemize

@item
Ability to feed @command{nncp-file} from @code{stdin}, that uses an
encrypted temporary file for that.

@item
Chunked files transmission appeared with corresponding
@command{nncp-reass} command and @option{freqchunked} configuration file
entry. Useful for transferring big files over small storage devices.

@item
@option{freqminsize} configuration file option, analogue to
@option{-minsize} one.

@item
@command{nncp-xfer}'s @option{-force} option is renamed to
@option{-mkdir} for clarity.

@item
@option{-minsize} option is specified in KiBs, not bytes, for
convenience.

@item
@command{nncp-newcfg} command is renamed to @command{nncp-cfgnew},
and @command{nncp-mincfg} to @command{nncp-cfgmin} -- now they have
common prefix and are grouped together for convenience.

@item
@command{nncp-cfgenc} command appeared, allowing configuration file
encryption/decryption, for keeping it safe without any either OpenPGP or
similar tools usage.

@item
Cryptographic libraries (dependencies) are updated.

@end itemize

@node Release 0.6
@section Release 0.6
@itemize
@item Small @command{nncp-rm} command appeared.
@item Cryptographic libraries (dependencies) are updated.
@end itemize

@node Release 0.5
@section Release 0.5
@itemize
@item
Trivial small fix in default niceness level of @command{nncp-file}
and @command{nncp-freq} commands.
@end itemize

@node Release 0.4
@section Release 0.4
@itemize

@item
Small fix in @command{nncp-call}, @command{nncp-caller},
@command{nncp-daemon}: they can segmentation fail sometimes (no data is
lost).

@item
@command{nncp-newnode} renamed to @command{nncp-newcfg} -- it is shorter
and more convenient to use.

@item
@command{nncp-mincfg} command appeared: helper allowing to create
minimalistic stripped down configuration file without private keys, that
is useful during @command{nncp-xfer} usage.

@end itemize

@node Release 0.3
@section Release 0.3
@itemize
@item Fixed compatibility with Go 1.6.
@end itemize

@node Release 0.2
@section Release 0.2
@itemize

@item
@strong{Incompatible} packet's format change (magic number is changed
too): size field is encrypted and is not send in plaintext anymore.

@item
@option{-minsize} option gives ability to automatically pad outgoing
packets to specified minimal size.

@item
@command{nncp-daemon} and @command{nncp-call}/@command{nncp-caller}
always check new @emph{tx} packets appearance in the background while
connected. Remote side is immediately notified.

@item
@option{-onlinedeadline} option gives ability to configure timeout of
inactivity of online connection, when it could be disconnected. It could
be used to keep connection alive for a long time.

@item
@option{-maxonlinetime} option gives ability to set maximal allowable
online connection aliveness time.

@item
@command{nncp-caller} command appeared: cron-ed TCP daemon caller.

@item
@command{nncp-pkt} command can decompress the data.

@end itemize