4 See also this page @ref{Новости, on russian}.
11 Merkle Tree-based Hashing with BLAKE3 (MTH) is used instead of BLAKE2b.
12 Because of that, there are backward @strong{incompatible} changes of
13 encrypted files (everything laying in the spool directory) and
14 @file{.meta} files of chunked transfer.
16 Current implementation is far from being optimal: it lacks
17 parallelizable calculations and has higher memory consumption: nearly
18 512 KiB for each 1 GiB of file's data. Future performance and memory
19 size optimizations should not lead to packet's format change. But it is
20 still several times faster than BLAKE2b.
23 Resumed online downloads, because of MTH, require reading only of the
24 preceding part of file, not the whole one as was before.
27 @command{nncp-hash} utility appeared for calculating file's MTH hash.
30 MultiCast Discovery uses
31 @verb{|ff02::4e4e:4350|} address instead of @verb{|ff02::1|}.
39 @section Release 6.6.0
43 @command{nncp-daemon}, @command{nncp-call} and @command{nncp-caller}
44 commands wait for all background checksummers completion after
45 connection is finished.
48 Added possibility of address determining through multicast announcement
49 in local area network, so called MCD (MultiCast Discovery).
54 @section Release 6.5.0
58 Fixed segfault in @command{nncp-daemon} when SP handshake did not succeed.
61 Fixed possible bad return code ignoring in automatic tosser.
64 Fixed race during file descriptors closing when online protocol call is
65 finished, that could lead to write error of received packet fragment.
68 Kill all packet transmission progress bars in @command{nncp-daemon},
69 @command{nncp-call} and @command{nncp-caller} when call is finished.
74 @section Release 6.4.0
78 Fixed possible race in online protocol, that lead to panic.
83 @section Release 6.3.0
87 Fixed possible panic while showing progress during online protocol.
92 @section Release 6.2.1
96 Three places in logs contained excess @code{%s}.
101 @section Release 6.2.0
105 Returned @command{nncp-caller}'s @option{-autotoss*} options workability.
108 Yet another logging refactoring and simplification.
109 Should be no visible differences to the end user.
114 @section Release 6.1.0
118 Optimization: most commands do not keep opened file descriptors now.
119 Previously you can exceed maximal number of opened files if you have got
120 many packets in the spool directory.
123 Optimization: do not close file descriptor of the file we download
124 online. Previously each chunk lead to expensive open/close calls.
127 Online downloaded files are saved with @file{.nock} (non-checksummed)
128 suffix, waiting either for @command{nncp-check}, or online daemons to
129 perform integrity check.
132 Optimization: files, that are not resumed, are checksummed immediately
133 during the online download, skipping @file{.nock}-intermediate step.
136 Ability to store encrypted packet's header in @file{.hdr} file, close to
137 the packet itself. That can greatly increase performance of packets
138 listing on filesystems with big block's size.
143 @section Release 6.0.0
147 Log uses human readable and easy machine parseable
148 @url{https://www.gnu.org/software/recutils/, recfile} format for the
149 records, instead of structured RFC 3339 lines. Old logs are not readable
150 by @command{nncp-log} anymore.
153 @option{-autotoss*} option workability with @command{nncp-daemon}'s
154 @option{-inetd} mode.
157 Call's @option{when-tx-exists} allows to make a call only when outbound
158 packets exists. Combined with seconds-aware cron expression that can be
159 used as some kind of auto dialler.
162 @command{nncp-cronexpr} command allows you to check validity and
163 expectations of specified cron expression.
168 @section Release 5.6.0
172 @option{-autotoss*} option runs tosser not after the call, but every
173 second while it is active.
176 @option{autotoss}, @option{autotoss-doseen},
177 @option{autotoss-nofile}, @option{autotoss-nofreq},
178 @option{autotoss-noexec}, @option{autotoss-notrns} options available in
179 @option{calls} configuration section. You can configure per-call
180 automatic tosser options.
183 Use vendoring, instead of @env{GOPATH} overriding during tarball
184 installation, because current minimal Go's version is 1.12 and it
190 @section Release 5.5.1
194 Respect for @env{BINDIR}, @env{INFODIR} and @env{DOCDIR} environment
195 variables in @file{config} during installation.
200 @section Release 5.5.0
204 Bugfixes in @command{nncp-call(er)}/@command{nncp-daemon},
205 @command{nncp-bundle} and @command{nncp-stat}.
208 @command{nncp-rm} has @option{-dryrun} and @option{-older} options now.
211 @command{nncp-exec} has @option{-use-tmp} and @option{-nocompress}
212 options now. Uncompressed packets are not compatible with previous NNCP
216 @command{nncp-call}, @command{nncp-caller} and @command{nncp-daemon} commands
217 have @option{-autotoss*} options for running tosser after call is ended.
220 Updated dependencies. Minimal required Go version is 1.12.
225 @section Release 5.4.1
229 Fixed @code{SENDMAIL} variable usage during the build.
234 @section Release 5.4.0
238 Updated dependencies.
241 Build system is moved from Makefiles to @url{http://cr.yp.to/redo.html, redo}.
242 This should not influence package maintainers, because minimal @command{redo}
243 implementation is included in tarball.
248 @section Release 5.3.3
252 More various error checks.
255 Updated dependencies.
260 @section Release 5.3.2
264 Fixed incorrect logic of @option{onlinedeadline} timeout, where
265 connection won't take into account incoming packets events and will
266 forcefully disconnect.
271 @section Release 5.3.1
275 Fixed @option{onlinedeadline} workability with call addresses that use
276 external commands (@verb{#"|somecmd"#}).
279 @command{nncp-stat} has @option{-pkt} option displaying information
280 about each packet in the spool.
285 @section Release 5.3.0
289 Progress messages contain prefix, describing the running action.
292 Fixed not occurring handshake messages padding.
295 Finish all SP protocol related goroutines, less memory leak.
298 SP protocol generates less socket write calls, thus generating less TCP
302 Check @option{onlinedeadline} and @option{maxonlinetime} options every
303 second, independently from socket reads (up to 10 seconds).
306 Once per minute, if no other traffic exists, PING packets are sent in
307 SP-connection. That allows faster determining of connection unworkability.
310 @command{nncp-toss} uses lock-file to prevent simultaneous tossing.
315 @section Release 5.2.1
319 Fixed SP protocol error handling, sometimes causing program panic.
324 @section Release 5.2.0
328 Most commands by default show oneline operations progress.
329 @option{-progress}, @option{-noprogress} command line options,
330 @option{noprogress} configuration file option appeared.
333 Fixed incorrect @command{nncp-check} command return code, that returned
334 bad code when everything is good.
337 Free disk space check during @command{nncp-bundle -rx} call.
342 @section Release 5.1.2
346 @strong{Critical} vulnerability: remote peers authentication could lead
347 to incorrect identification of remote side, allowing foreign encrypted
351 Bugfix: private and public Noise keys were swapped in newly created
352 configuration files, that lead to inability to authenticate online peers.
355 Explicit directories fsync-ing for guaranteed files renaming.
360 @section Release 5.1.1
364 Fixed workability of @command{nncp-file} with @option{-chunked 0} option.
369 @section Release 5.1.0
373 @command{nncp-file} can send directories, automatically creating pax
377 Free disk space is checked during outbound packets creation.
380 @option{freq}, @option{freqminsize}, @option{freqchunked} configuration
381 file options replaced with the structure:
382 @option{freq: @{path: ..., minsize: ..., chunked: ...@}}.
385 Added @option{freq.maxsize} configuration file option, forbidding of
386 freq sending larger than specified size.
389 Ability to notify about successfully executed commands (exec) with
390 @option{notify.exec} configuration file option.
395 @section Release 5.0.0
399 @strong{Incompatible} configuration file format change: YAML is
400 replaced with Hjson, due to its simplicity, without noticeable lack
401 of either functionality or convenience.
404 @strong{Incompatible} plain packet format changes. Older versions are
405 not supported. @code{zlib} compression is replaced with
406 @code{Zstandard}, due to its speed and efficiency, despite library
407 version is not mature enough.
410 Ability to call remote nodes via pipe call of external command, not only
414 @command{nncp-cfgnew} generates configuration file with many
415 comments. @option{-nocomments} option can be used for an old
419 Duplicate filenames have @file{.CTR} suffix, instead of @file{CTR}, to
420 avoid possible collisions with @file{.nncp.chunkCTR}.
423 Ability to override process umask through configuration file option.
426 Files and directories are created with 666/777 permissions by default,
427 allowing control with @command{umask}.
430 Updated dependencies.
433 Full usage of go modules for dependencies management
434 (@code{go.cypherpunks.ru/nncp/v5} namespace is used).
437 Forbid any later GNU GPL version autousage
438 (project's licence now is GNU GPLv3-only).
445 @item Workability on GNU/Linux systems and Go 1.10 is fixed.
453 @strong{Incompatible} encrypted and eblob packet format change: AEAD
454 encryption mode with 128 KiB blocks is used now, because previously
455 @command{nncp-toss} did not verify encrypted packet's MAC before feeding
456 decrypted data to external command. Older versions are not supported.
459 Available free space checking before copying in @command{nncp-xfer},
460 @command{nncp-daemon}, @command{nncp-call(er)}.
463 @command{nncp-call} has ability only to list packets on remote node,
464 without their transmission.
467 @command{nncp-call} has ability to transfer only specified packets.
470 Workability of @option{xxrate} preference in @option{calls}
471 configuration file section.
474 Dependant libraries are updated.
480 Begin using of @code{go.mod} subsystem.
487 @item @command{nncp-daemon} can be run as @command{inetd}-service.
495 @command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller} check
496 if @file{.seen} exists and treat it like file was already downloaded.
497 Possibly it was transferred out-of-bound and remote side needs to be
501 If higher priority packet is spooled, then @command{nncp-daemon} will
502 queue its sending first, interrupting lower priority transmissions.
505 Simple packet rate limiter added to online-related tools
506 (@command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller}).
509 Ability to specify niceness with symbolic notation:
510 @verb{|NORMAL|}, @verb{|BULK+10|}, @verb{|PRIORITY-5|}, etc.
513 Changed default niceness levels:
514 for @command{nncp-exec} from 64 to 96,
515 for @command{nncp-freq} from 64 to 160,
516 for @command{nncp-file} from 196 to 224.
524 @strong{Incompatible} @emph{bundle} archive format changes and
525 @command{nncp-bundle} workability with Go 1.10+. Bundles must be
526 valid tar archives, but Go 1.9 made them invalid because of long paths
527 inside. NNCP accidentally was dependant on that bug. Explicit adding of
528 @file{NNCP/} directory in archive restores workability with valid tar
536 Ability to disable relaying at all using @verb{|-via -|} command line option.
544 @strong{Incompatible} plain packet format changes. Older versions are
548 Ability to queue remote command execution, by configuring @option{exec}
549 option in configuration file and using @command{nncp-exec} command:
552 @command{nncp-mail} command is replaced with more flexible
553 @command{nncp-exec}. Instead of @verb{|nncp-mail NODE RECIPIENT|}
554 you must use @verb{|nncp-exec NODE sendmail RECIPIENT|}.
556 @option{sendmail} configuration file option is replaced with
557 @option{exec}. @verb{|sendmail: [...]|} must be replaced with
558 @verb{|exec: sendmail: [...]|}.
562 Ability to override @option{via} configuration option for destination
563 node via @option{-via} command line option for following commands:
564 @command{nncp-file}, @command{nncp-freq}, @command{nncp-exec}.
567 Chunked files, having size less than specified chunk size, will be sent
568 as an ordinary single file.
571 Exec commands are invoked with additional @env{NNCP_NICE} and
572 @env{NNCP_SELF} environment variables.
575 Files, that are sent as a reply to freq, have niceness level taken from
576 the freq packet. You can set desired niceness during @command{nncp-freq}
577 invocation using @option{-replynice} option.
580 @command{nncp-toss} command can ignore specified packet types during
581 processing: @option{-nofile}, @option{-nofreq}, @option{-noexec},
585 @command{nncp-file} command uses
586 @option{FreqMinSize}/@option{FreqChunked} configuration file options
587 for @option{-minsize}/@option{-chunked} by default. You can turn this
588 off by specifying zero value.
597 @strong{Incompatible} encrypted/eblob packet format changes. Older
598 versions are not supported.
601 Twofish encryption algorithm is replaced with ChaCha20. It is much more
602 faster. One cryptographic primitive less.
605 HKDF-BLAKE2b-256 KDF algorithm is replaced with BLAKE2Xb XOF. Yet
606 another cryptographic primitive less (assuming that BLAKE2X is nearly
607 identical to BLAKE2).
616 @strong{Incompatible} encrypted packet format changes. Older versions
620 @command{nncp-bundle} command can either create stream of encrypted
621 packets, or digest it. It is useful when dealing with
622 @code{stdin}/@code{stdout} based transmission methods (like writing to
623 CD-ROM without intermediate prepared ISO image and working with tape
627 @command{nncp-toss} is able to create @file{.seen} files preventing
628 duplicate packets receiving.
631 Single background checksum verifier worker is allowed in
632 @command{nncp-call}. This is helpful when thousands of small inbound
633 packets could create many goroutines.
636 Ability to override path to spool directory and logfile through either
637 command line argument, or environment variable.
640 @command{nncp-rm} is able to delete outbound/inbound, @file{.seen},
641 @file{.part}, @file{.lock} and temporary files.
646 @section Release 0.12
648 @item Sendmail command is called with @env{NNCP_SENDER} environment variable.
652 @section Release 0.11
654 @item @command{nncp-stat}'s command output is sorted by node name.
658 @section Release 0.10
661 @command{nncp-freq}'s @file{DST} argument is optional now. Last
662 @file{SRC} path's element will be used by default.
669 Fix @option{-rx}/@option{-tx} arguments processing in
670 @command{nncp-call} command. They were ignored.
677 Little bugfix in @command{nncp-file} command, where @option{-minsize}
678 option for unchunked transfer was not in KiBs, but in bytes.
686 Ability to feed @command{nncp-file} from @code{stdin}, that uses an
687 encrypted temporary file for that.
690 Chunked files transmission appeared with corresponding
691 @command{nncp-reass} command and @option{freqchunked} configuration file
692 entry. Useful for transferring big files over small storage devices.
695 @option{freqminsize} configuration file option, analogue to
696 @option{-minsize} one.
699 @command{nncp-xfer}'s @option{-force} option is renamed to
700 @option{-mkdir} for clarity.
703 @option{-minsize} option is specified in KiBs, not bytes, for
707 @command{nncp-newcfg} command is renamed to @command{nncp-cfgnew},
708 and @command{nncp-mincfg} to @command{nncp-cfgmin} -- now they have
709 common prefix and are grouped together for convenience.
712 @command{nncp-cfgenc} command appeared, allowing configuration file
713 encryption/decryption, for keeping it safe without any either OpenPGP or
717 Cryptographic libraries (dependencies) are updated.
724 @item Small @command{nncp-rm} command appeared.
725 @item Cryptographic libraries (dependencies) are updated.
732 Trivial small fix in default niceness level of @command{nncp-file}
733 and @command{nncp-freq} commands.
741 Small fix in @command{nncp-call}, @command{nncp-caller},
742 @command{nncp-daemon}: they can segmentation fail sometimes (no data is
746 @command{nncp-newnode} renamed to @command{nncp-newcfg} -- it is shorter
747 and more convenient to use.
750 @command{nncp-mincfg} command appeared: helper allowing to create
751 minimalistic stripped down configuration file without private keys, that
752 is useful during @command{nncp-xfer} usage.
759 @item Fixed compatibility with Go 1.6.
767 @strong{Incompatible} packet's format change (magic number is changed
768 too): size field is encrypted and is not send in plaintext anymore.
771 @option{-minsize} option gives ability to automatically pad outgoing
772 packets to specified minimal size.
775 @command{nncp-daemon} and @command{nncp-call}/@command{nncp-caller}
776 always check new @emph{tx} packets appearance in the background while
777 connected. Remote side is immediately notified.
780 @option{-onlinedeadline} option gives ability to configure timeout of
781 inactivity of online connection, when it could be disconnected. It could
782 be used to keep connection alive for a long time.
785 @option{-maxonlinetime} option gives ability to set maximal allowable
786 online connection aliveness time.
789 @command{nncp-caller} command appeared: cron-ed TCP daemon caller.
792 @command{nncp-pkt} command can decompress the data.