4 See also this page @ref{Новости, on russian}.
11 Logging may be done to specified opened file descriptor
12 (@env{$NNCPLOG=FD:5} for example).
13 That is friendly to use under @command{daemontools}.
18 @section Release 7.5.1
22 NNCP builds on NetBSD.
27 @section Release 7.5.0
31 @command{nncp-daemon} is compatible with UCSPI-TCP interface, so log
32 will contain remote side's address (when running under appropriate
33 utility). @option{-ucspi} option should be used instead of @option{-inetd}.
36 @command{nncp-call} can be UCSPI-TCP client, using @option{-ucspi} option.
39 Do not exit if some of MCD network interfaces can not be listened --
45 @section Release 7.4.0
49 Fixed simultaneous @command{nncp-daemon} and @command{nncp-caller} MCD work.
54 @section Release 7.3.2
58 @command{hjson-cli} utility builds in vendor-mode now.
63 @section Release 7.3.1
67 Fixed possibly left opened file descriptor in online commands.
70 Severely decreased memory usage of MTH hashing.
75 @section Release 7.3.0
79 Fixed some workability problems on 32-bit systems with big files.
82 Ability to use directory with a bunch of files as a configuration.
83 @command{nncp-cfgdir} command appeared.
88 @section Release 7.2.1
92 Small optimizations in online commands.
97 @section Release 7.2.0
101 @command{nncp-trns} command appeared for manual transition packets creation.
104 If destination node of transitional packet has non empty @option{via}
105 route, then do not ignore, but use it.
108 Do not relay multicast packet to area message's originator, that
109 obviously has seen its own packet.
112 Much less memory usage during MTH hashing when offset is zero: when
113 packet is not resumed, but for example checked with @command{nncp-check}
119 @section Release 7.1.1
123 Fixed failing directories fsync after @file{.seen} file creation.
128 @section Release 7.1.0
132 Multicasting areas feature appeared. Implemented merely by an additional
133 plain packet type with @command{nncp-toss}, @command{nncp-file} and
134 @command{nncp-exec} commands modification.
137 Fixed workability of @command{nncp-file} and @command{nncp-exec}
138 commands, that use temporary file (stdin and @option{-use-tmp}).
141 Fixed disappearing bad return code in @command{nncp-exec} command.
144 Fixed invalid @file{.hdr} generation when transitional packets are used.
147 @option{-all} option appeared in @command{nncp-rm} command, applying to
148 all the nodes at once.
151 @option{-cycle} option appeared in @command{nncp-check} command, looping
152 the check in infinite cycle.
155 @command{nncp-rm} command can take node alias name.
158 @command{nncp-pkt} can parse @file{.hdr} files.
163 @section Release 7.0.0
167 Minimal required Go version 1.13.
170 Merkle Tree-based Hashing with BLAKE3 (MTH) is used instead of BLAKE2b.
171 Because of that, there are backward @strong{incompatible} changes of
172 encrypted files (everything laying in the spool directory) and
173 @file{.meta} files of chunked transfer.
175 Current implementation is far from being optimal: it lacks
176 parallelizable calculations and has higher memory consumption: nearly
177 512 KiB for each 1 GiB of file's data. Future performance and memory
178 size optimizations should not lead to packet's format change. But it is
179 still several times faster than BLAKE2b.
182 Resumed online downloads, because of MTH, require reading only of the
183 preceding part of file, not the whole one as was before.
186 @command{nncp-hash} utility appeared for calculating file's MTH hash.
189 BLAKE2 KDF and XOF functions are replaced with BLAKE3 in encrypted
190 packets. Lowering number of used primitives. Also, its encrypted
191 packet's header is used as an associated data during encryption.
194 MultiCast Discovery uses
195 @verb{|ff02::4e4e:4350|} address instead of @verb{|ff02::1|}.
198 @command{nncp-cfgenc} mistakenly asked passphrase three times during encryption.
201 @command{nncp-stat} reports about partly downloaded packets.
204 Updated dependencies.
209 @section Release 6.6.0
213 @command{nncp-daemon}, @command{nncp-call} and @command{nncp-caller}
214 commands wait for all background checksummers completion after
215 connection is finished.
218 Added possibility of address determining through multicast announcement
219 in local area network, so called MCD (MultiCast Discovery).
224 @section Release 6.5.0
228 Fixed segfault in @command{nncp-daemon} when SP handshake did not succeed.
231 Fixed possible bad return code ignoring in automatic tosser.
234 Fixed race during file descriptors closing when online protocol call is
235 finished, that could lead to write error of received packet fragment.
238 Kill all packet transmission progress bars in @command{nncp-daemon},
239 @command{nncp-call} and @command{nncp-caller} when call is finished.
244 @section Release 6.4.0
248 Fixed possible race in online protocol, that lead to panic.
253 @section Release 6.3.0
257 Fixed possible panic while showing progress during online protocol.
262 @section Release 6.2.1
266 Three places in logs contained excess @code{%s}.
271 @section Release 6.2.0
275 Returned @command{nncp-caller}'s @option{-autotoss*} options workability.
278 Yet another logging refactoring and simplification.
279 Should be no visible differences to the end user.
284 @section Release 6.1.0
288 Optimization: most commands do not keep opened file descriptors now.
289 Previously you can exceed maximal number of opened files if you have got
290 many packets in the spool directory.
293 Optimization: do not close file descriptor of the file we download
294 online. Previously each chunk lead to expensive open/close calls.
297 Online downloaded files are saved with @file{.nock} (non-checksummed)
298 suffix, waiting either for @command{nncp-check}, or online daemons to
299 perform integrity check.
302 Optimization: files, that are not resumed, are checksummed immediately
303 during the online download, skipping @file{.nock}-intermediate step.
306 Ability to store encrypted packet's header in @file{.hdr} file, close to
307 the packet itself. That can greatly increase performance of packets
308 listing on filesystems with big block's size.
313 @section Release 6.0.0
317 Log uses human readable and easy machine parseable
318 @url{https://www.gnu.org/software/recutils/, recfile} format for the
319 records, instead of structured RFC 3339 lines. Old logs are not readable
320 by @command{nncp-log} anymore.
323 @option{-autotoss*} option workability with @command{nncp-daemon}'s
324 @option{-inetd} mode.
327 Call's @option{when-tx-exists} allows to make a call only when outbound
328 packets exists. Combined with seconds-aware cron expression that can be
329 used as some kind of auto dialler.
332 @command{nncp-cronexpr} command allows you to check validity and
333 expectations of specified cron expression.
338 @section Release 5.6.0
342 @option{-autotoss*} option runs tosser not after the call, but every
343 second while it is active.
346 @option{autotoss}, @option{autotoss-doseen},
347 @option{autotoss-nofile}, @option{autotoss-nofreq},
348 @option{autotoss-noexec}, @option{autotoss-notrns} options available in
349 @option{calls} configuration section. You can configure per-call
350 automatic tosser options.
353 Use vendoring, instead of @env{$GOPATH} overriding during tarball
354 installation, because current minimal Go's version is 1.12 and it
360 @section Release 5.5.1
364 Respect for @env{$BINDIR}, @env{$INFODIR} and @env{$DOCDIR} environment
365 variables in @file{config} during installation.
370 @section Release 5.5.0
374 Bugfixes in @command{nncp-call(er)}/@command{nncp-daemon},
375 @command{nncp-bundle} and @command{nncp-stat}.
378 @command{nncp-rm} has @option{-dryrun} and @option{-older} options now.
381 @command{nncp-exec} has @option{-use-tmp} and @option{-nocompress}
382 options now. Uncompressed packets are not compatible with previous NNCP
386 @command{nncp-call}, @command{nncp-caller} and @command{nncp-daemon} commands
387 have @option{-autotoss*} options for running tosser after call is ended.
390 Updated dependencies. Minimal required Go version is 1.12.
395 @section Release 5.4.1
399 Fixed @code{SENDMAIL} variable usage during the build.
404 @section Release 5.4.0
408 Updated dependencies.
411 Build system is moved from Makefiles to @url{http://cr.yp.to/redo.html, redo}.
412 This should not influence package maintainers, because minimal @command{redo}
413 implementation is included in tarball.
418 @section Release 5.3.3
422 More various error checks.
425 Updated dependencies.
430 @section Release 5.3.2
434 Fixed incorrect logic of @option{onlinedeadline} timeout, where
435 connection won't take into account incoming packets events and will
436 forcefully disconnect.
441 @section Release 5.3.1
445 Fixed @option{onlinedeadline} workability with call addresses that use
446 external commands (@verb{#"|somecmd"#}).
449 @command{nncp-stat} has @option{-pkt} option displaying information
450 about each packet in the spool.
455 @section Release 5.3.0
459 Progress messages contain prefix, describing the running action.
462 Fixed not occurring handshake messages padding.
465 Finish all SP protocol related goroutines, less memory leak.
468 SP protocol generates less socket write calls, thus generating less TCP
472 Check @option{onlinedeadline} and @option{maxonlinetime} options every
473 second, independently from socket reads (up to 10 seconds).
476 Once per minute, if no other traffic exists, PING packets are sent in
477 SP-connection. That allows faster determining of connection unworkability.
480 @command{nncp-toss} uses lock-file to prevent simultaneous tossing.
485 @section Release 5.2.1
489 Fixed SP protocol error handling, sometimes causing program panic.
494 @section Release 5.2.0
498 Most commands by default show oneline operations progress.
499 @option{-progress}, @option{-noprogress} command line options,
500 @option{noprogress} configuration file option appeared.
503 Fixed incorrect @command{nncp-check} command return code, that returned
504 bad code when everything is good.
507 Free disk space check during @command{nncp-bundle -rx} call.
512 @section Release 5.1.2
516 @strong{Critical} vulnerability: remote peers authentication could lead
517 to incorrect identification of remote side, allowing foreign encrypted
521 Bugfix: private and public Noise keys were swapped in newly created
522 configuration files, that lead to inability to authenticate online peers.
525 Explicit directories fsync-ing for guaranteed files renaming.
530 @section Release 5.1.1
534 Fixed workability of @command{nncp-file} with @option{-chunked 0} option.
539 @section Release 5.1.0
543 @command{nncp-file} can send directories, automatically creating pax
547 Free disk space is checked during outbound packets creation.
550 @option{freq}, @option{freqminsize}, @option{freqchunked} configuration
551 file options replaced with the structure:
552 @option{freq: @{path: @dots{}, minsize: @dots{}, chunked: @dots{}@}}.
555 Added @option{freq.maxsize} configuration file option, forbidding of
556 freq sending larger than specified size.
559 Ability to notify about successfully executed commands (exec) with
560 @option{notify.exec} configuration file option.
565 @section Release 5.0.0
569 @strong{Incompatible} configuration file format change: YAML is
570 replaced with Hjson, due to its simplicity, without noticeable lack
571 of either functionality or convenience.
574 @strong{Incompatible} plain packet format changes. Older versions are
575 not supported. @code{zlib} compression is replaced with
576 @code{Zstandard}, due to its speed and efficiency, despite library
577 version is not mature enough.
580 Ability to call remote nodes via pipe call of external command, not only
584 @command{nncp-cfgnew} generates configuration file with many
585 comments. @option{-nocomments} option can be used for an old
589 Duplicate filenames have @file{.CTR} suffix, instead of @file{CTR}, to
590 avoid possible collisions with @file{.nncp.chunkCTR}.
593 Ability to override process umask through configuration file option.
596 Files and directories are created with 666/777 permissions by default,
597 allowing control with @command{umask}.
600 Updated dependencies.
603 Full usage of go modules for dependencies management
604 (@code{go.cypherpunks.ru/nncp/v5} namespace is used).
607 Forbid any later GNU GPL version autousage
608 (project's licence now is GNU GPLv3-only).
615 @item Workability on GNU/Linux systems and Go 1.10 is fixed.
623 @strong{Incompatible} encrypted and eblob packet format change: AEAD
624 encryption mode with 128 KiB blocks is used now, because previously
625 @command{nncp-toss} did not verify encrypted packet's MAC before feeding
626 decrypted data to external command. Older versions are not supported.
629 Available free space checking before copying in @command{nncp-xfer},
630 @command{nncp-daemon}, @command{nncp-call(er)}.
633 @command{nncp-call} has ability only to list packets on remote node,
634 without their transmission.
637 @command{nncp-call} has ability to transfer only specified packets.
640 Workability of @option{xxrate} preference in @option{calls}
641 configuration file section.
644 Dependant libraries are updated.
650 Begin using of @code{go.mod} subsystem.
657 @item @command{nncp-daemon} can be run as @command{inetd}-service.
665 @command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller} check
666 if @file{.seen} exists and treat it like file was already downloaded.
667 Possibly it was transferred out-of-bound and remote side needs to be
671 If higher priority packet is spooled, then @command{nncp-daemon} will
672 queue its sending first, interrupting lower priority transmissions.
675 Simple packet rate limiter added to online-related tools
676 (@command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller}).
679 Ability to specify niceness with symbolic notation:
680 @verb{|NORMAL|}, @verb{|BULK+10|}, @verb{|PRIORITY-5|}, etc.
683 Changed default niceness levels:
684 for @command{nncp-exec} from 64 to 96,
685 for @command{nncp-freq} from 64 to 160,
686 for @command{nncp-file} from 196 to 224.
694 @strong{Incompatible} @emph{bundle} archive format changes and
695 @command{nncp-bundle} workability with Go 1.10+. Bundles must be
696 valid tar archives, but Go 1.9 made them invalid because of long paths
697 inside. NNCP accidentally was dependant on that bug. Explicit adding of
698 @file{NNCP/} directory in archive restores workability with valid tar
706 Ability to disable relaying at all using @verb{|-via -|} command line option.
714 @strong{Incompatible} plain packet format changes. Older versions are
718 Ability to queue remote command execution, by configuring @option{exec}
719 option in configuration file and using @command{nncp-exec} command:
722 @command{nncp-mail} command is replaced with more flexible
723 @command{nncp-exec}. Instead of @verb{|nncp-mail NODE RECIPIENT|}
724 you must use @verb{|nncp-exec NODE sendmail RECIPIENT|}.
726 @option{sendmail} configuration file option is replaced with
727 @option{exec}. @verb{|sendmail: [...]|} must be replaced with
728 @verb{|exec: sendmail: [...]|}.
732 Ability to override @option{via} configuration option for destination
733 node via @option{-via} command line option for following commands:
734 @command{nncp-file}, @command{nncp-freq}, @command{nncp-exec}.
737 Chunked files, having size less than specified chunk size, will be sent
738 as an ordinary single file.
741 Exec commands are invoked with additional @env{$NNCP_NICE} and
742 @env{$NNCP_SELF} environment variables.
745 Files, that are sent as a reply to freq, have niceness level taken from
746 the freq packet. You can set desired niceness during @command{nncp-freq}
747 invocation using @option{-replynice} option.
750 @command{nncp-toss} command can ignore specified packet types during
751 processing: @option{-nofile}, @option{-nofreq}, @option{-noexec},
755 @command{nncp-file} command uses
756 @option{FreqMinSize}/@option{FreqChunked} configuration file options
757 for @option{-minsize}/@option{-chunked} by default. You can turn this
758 off by specifying zero value.
767 @strong{Incompatible} encrypted/eblob packet format changes. Older
768 versions are not supported.
771 Twofish encryption algorithm is replaced with ChaCha20. It is much more
772 faster. One cryptographic primitive less.
775 HKDF-BLAKE2b-256 KDF algorithm is replaced with BLAKE2Xb XOF. Yet
776 another cryptographic primitive less (assuming that BLAKE2X is nearly
777 identical to BLAKE2).
786 @strong{Incompatible} encrypted packet format changes. Older versions
790 @command{nncp-bundle} command can either create stream of encrypted
791 packets, or digest it. It is useful when dealing with
792 @code{stdin}/@code{stdout} based transmission methods (like writing to
793 CD-ROM without intermediate prepared ISO image and working with tape
797 @command{nncp-toss} is able to create @file{.seen} files preventing
798 duplicate packets receiving.
801 Single background checksum verifier worker is allowed in
802 @command{nncp-call}. This is helpful when thousands of small inbound
803 packets could create many goroutines.
806 Ability to override path to spool directory and logfile through either
807 command line argument, or environment variable.
810 @command{nncp-rm} is able to delete outbound/inbound, @file{.seen},
811 @file{.part}, @file{.lock} and temporary files.
816 @section Release 0.12
818 @item Sendmail command is called with @env{$NNCP_SENDER} environment variable.
822 @section Release 0.11
824 @item @command{nncp-stat}'s command output is sorted by node name.
828 @section Release 0.10
831 @command{nncp-freq}'s @file{DST} argument is optional now. Last
832 @file{SRC} path's element will be used by default.
839 Fix @option{-rx}/@option{-tx} arguments processing in
840 @command{nncp-call} command. They were ignored.
847 Little bugfix in @command{nncp-file} command, where @option{-minsize}
848 option for unchunked transfer was not in KiBs, but in bytes.
856 Ability to feed @command{nncp-file} from @code{stdin}, that uses an
857 encrypted temporary file for that.
860 Chunked files transmission appeared with corresponding
861 @command{nncp-reass} command and @option{freqchunked} configuration file
862 entry. Useful for transferring big files over small storage devices.
865 @option{freqminsize} configuration file option, analogue to
866 @option{-minsize} one.
869 @command{nncp-xfer}'s @option{-force} option is renamed to
870 @option{-mkdir} for clarity.
873 @option{-minsize} option is specified in KiBs, not bytes, for
877 @command{nncp-newcfg} command is renamed to @command{nncp-cfgnew},
878 and @command{nncp-mincfg} to @command{nncp-cfgmin} -- now they have
879 common prefix and are grouped together for convenience.
882 @command{nncp-cfgenc} command appeared, allowing configuration file
883 encryption/decryption, for keeping it safe without any either OpenPGP or
887 Cryptographic libraries (dependencies) are updated.
894 @item Small @command{nncp-rm} command appeared.
895 @item Cryptographic libraries (dependencies) are updated.
902 Trivial small fix in default niceness level of @command{nncp-file}
903 and @command{nncp-freq} commands.
911 Small fix in @command{nncp-call}, @command{nncp-caller},
912 @command{nncp-daemon}: they can segmentation fail sometimes (no data is
916 @command{nncp-newnode} renamed to @command{nncp-newcfg} -- it is shorter
917 and more convenient to use.
920 @command{nncp-mincfg} command appeared: helper allowing to create
921 minimalistic stripped down configuration file without private keys, that
922 is useful during @command{nncp-xfer} usage.
929 @item Fixed compatibility with Go 1.6.
937 @strong{Incompatible} packet's format change (magic number is changed
938 too): size field is encrypted and is not send in plaintext anymore.
941 @option{-minsize} option gives ability to automatically pad outgoing
942 packets to specified minimal size.
945 @command{nncp-daemon} and @command{nncp-call}/@command{nncp-caller}
946 always check new @emph{tx} packets appearance in the background while
947 connected. Remote side is immediately notified.
950 @option{-onlinedeadline} option gives ability to configure timeout of
951 inactivity of online connection, when it could be disconnected. It could
952 be used to keep connection alive for a long time.
955 @option{-maxonlinetime} option gives ability to set maximal allowable
956 online connection aliveness time.
959 @command{nncp-caller} command appeared: cron-ed TCP daemon caller.
962 @command{nncp-pkt} command can decompress the data.