5 See also this page @ref{Новости, on russian}.
12 @command{nncp-ack} does not acknowledge ACK-packets, preventing an
16 @command{nncp-ack} previously did not remove corresponding @file{hdr/} files.
21 @section Release 8.6.0
25 @command{nncp-xfer} checks if locally copied packet's checksum differs
26 from the source's one.
29 @command{nncp-call} has bad return code if its queues contain unfinished jobs.
32 @command{nncp-ack} command appeared, that sends explicit packet receipt
33 acknowledgement (ACK packet). That acknowledgement deletes referenced
34 packet from the outbound spool.
37 Ability to turn @code{fsync} operation off using @env{$NNCPNOSYNC=1}
41 Added various indices in documentation, that should help searching in it.
46 @section Release 8.5.0
50 Fixed @command{nncp-bundle} workability.
53 Mistakenly @option{-mcd-wait} option was enabled by default in
57 Ability to override internal default timeout for online protocol through
58 @env{$NNCPDEADLINE} environment variable. Can be useful for very high
62 NNCP builds on OpenBSD.
67 @section Release 8.4.0
71 Multicast related interface names (@code{mcd-listen} and @code{mcd-send}
72 configuration options) are now regular expressions. By default
73 @command{nncp-cfgnew} uncomments them now with @code{.*} interface name.
76 @command{nncp-call} command has @option{-mcd-wait} option to wait for
77 multicast packet about node's address.
80 @command{nncp-file} command skips everything that is neither regular
81 file nor directory during pax-archive creation.
86 @section Release 8.3.0
90 Fixed building issues on 32-bit systems.
95 @section Release 8.2.0
99 Yggdrasil uses pure-Go IPv6+TCP network stack, instead of naked μTP
100 transport protocol, making it able to work as an ordinary TCP server
101 inside overlay network.
104 Yggdrasil's @code{prv;bind1,bind2;pub@dots{}}-like configuration strings are
105 replaced with URL-like ones (@code{yggdrasils://PRV?bind=BIND1&bind=BIND2&pub=PUB}).
108 Ability to pass multicast-related parameters to Yggdrasil configuration.
111 @command{nncp-daemon} is able to listen on both TCP and Yggdrasil-driven
112 sockets simultaneously.
115 @command{nncp-daemon}'s listening on peering endpoint socket is optional
116 -- you can be reached through the peers.
121 @section Release 8.1.0
125 @command{nncp-cfgdir} does not require @code{self} section existence in
129 Ability to act as Yggdrasil network client, using online protocol on top of it.
134 @section Release 8.0.2
138 Fixed sending ability to areas.
143 @section Release 8.0.1
147 Fixed incorrect @code{freq.chunked} value calculation. If it was missed,
148 then chunked transfer mode was forcefully turned on anyway.
151 Fixed incorrect full file's size calculation in @file{.nncp.meta}.
156 @section Release 8.0.0
160 @strong{Incompatible} encrypted packet format change: payload and pad
161 sizes are sent in-bound in the encrypted stream. That gives ability to
162 streamingly create encrypted packets, without knowing sizes in advance,
163 without creating temporary file or buffer data in memory.
166 Proper encrypted packet padding verification is done now. This is not
167 critical issue, but previously neither padding value, nor its size were
168 authenticated, giving ability to iteratively strip trailing bytes and
169 determine payload's size by observing the reaction of the encrypted
173 @command{nncp-exec} loses its @option{-use-tmp} option, because of
174 streaming-compatible encrypted packets format.
177 @command{nncp-file} and @command{nncp-exec} commands have
178 @option{-maxsize} option, limiting maximal resulting encrypted packet's
179 maximal size (returning error if it is exceeded). Could be useful,
180 because no payload size could be known in advance.
185 @section Release 7.7.0
189 Experimental @code{kqueue} and @code{inotify} based notifications
190 support about spool directory changes, for reducing their often reading
194 @file{.seen} and @file{.hdr} files moved to @file{seen/} and @file{hdr/}
195 subdirectories, for faster scanning of spool directories.
196 Current files migration required:
199 $ find $NNCPSPOOL -type f -name "*.hdr" -exec rm @{@} +
201 $ find $NNCPSPOOL -type d -name rx | while read rx ; do
204 find . -type f -name "*.seen" | while read fn ; do
205 mv $fn seen/$@{fn%.seen@}
209 $ find $NNCPSPOOL -type d -name area | while read area ; do
210 find $area -type f -name "*.seen" | while read fn ; do
219 @section Release 7.6.0
223 Logging may be done to specified opened file descriptor
224 (@env{$NNCPLOG=FD:5} for example).
225 That is friendly to use under @command{daemontools}.
228 Added additional checks of public keys existence in configuration file,
229 preventing some commands from failing.
234 @section Release 7.5.1
238 NNCP builds on NetBSD.
243 @section Release 7.5.0
247 @command{nncp-daemon} is compatible with UCSPI-TCP interface, so log
248 will contain remote side's address (when running under appropriate
249 utility). @option{-ucspi} option should be used instead of @option{-inetd}.
252 @command{nncp-call} can be UCSPI-TCP client, using @option{-ucspi} option.
255 Do not exit if some of MCD network interfaces can not be listened --
256 only warn about that.
261 @section Release 7.4.0
265 Fixed simultaneous @command{nncp-daemon} and @command{nncp-caller} MCD work.
270 @section Release 7.3.2
274 @command{hjson-cli} utility builds in vendor-mode now.
279 @section Release 7.3.1
283 Fixed possibly left opened file descriptor in online commands.
286 Severely decreased memory usage of MTH hashing.
291 @section Release 7.3.0
295 Fixed some workability problems on 32-bit systems with big files.
298 Ability to use directory with a bunch of files as a configuration.
299 @command{nncp-cfgdir} command appeared.
304 @section Release 7.2.1
308 Small optimizations in online commands.
313 @section Release 7.2.0
317 @command{nncp-trns} command appeared for manual transition packets creation.
320 If destination node of transitional packet has non empty @option{via}
321 route, then do not ignore, but use it.
324 Do not relay multicast packet to area message's originator, that
325 obviously has seen its own packet.
328 Much less memory usage during MTH hashing when offset is zero: when
329 packet is not resumed, but for example checked with @command{nncp-check}
335 @section Release 7.1.1
339 Fixed failing directories @code{fsync} after @file{.seen} file creation.
344 @section Release 7.1.0
348 Multicasting areas feature appeared. Implemented merely by an additional
349 plain packet type with @command{nncp-toss}, @command{nncp-file} and
350 @command{nncp-exec} commands modification.
353 Fixed workability of @command{nncp-file} and @command{nncp-exec}
354 commands, that use temporary file (@code{stdin} and @option{-use-tmp}).
357 Fixed disappearing bad return code in @command{nncp-exec} command.
360 Fixed invalid @file{.hdr} generation when transitional packets are used.
363 @option{-all} option appeared in @command{nncp-rm} command, applying to
364 all the nodes at once.
367 @option{-cycle} option appeared in @command{nncp-check} command, looping
368 the check in infinite cycle.
371 @command{nncp-rm} command can take node alias name.
374 @command{nncp-pkt} can parse @file{.hdr} files.
379 @section Release 7.0.0
383 Minimal required Go version 1.13.
386 Merkle Tree-based Hashing with BLAKE3 (MTH) is used instead of BLAKE2b.
387 Because of that, there are backward @strong{incompatible} changes of
388 encrypted files (everything laying in the spool directory) and
389 @file{.meta} files of chunked transfer.
391 Current implementation is far from being optimal: it lacks
392 parallelizable calculations and has higher memory consumption: nearly
393 512 KiB for each 1 GiB of file's data. Future performance and memory
394 size optimizations should not lead to packet's format change. But it is
395 still several times faster than BLAKE2b.
398 Resumed online downloads, because of MTH, require reading only of the
399 preceding part of file, not the whole one as was before.
402 @command{nncp-hash} utility appeared for calculating file's MTH hash.
405 BLAKE2 KDF and XOF functions are replaced with BLAKE3 in encrypted
406 packets. Lowering number of used primitives. Also, its encrypted
407 packet's header is used as an associated data during encryption.
410 MultiCast Discovery uses
411 @verb{|ff02::4e4e:4350|} address instead of @verb{|ff02::1|}.
414 @command{nncp-cfgenc} mistakenly asked passphrase three times during encryption.
417 @command{nncp-stat} reports about partly downloaded packets.
420 Updated dependencies.
425 @section Release 6.6.0
429 @command{nncp-daemon}, @command{nncp-call} and @command{nncp-caller}
430 commands wait for all background checksummers completion after
431 connection is finished.
434 Added possibility of address determining through multicast announcement
435 in local area network, so called MCD (MultiCast Discovery).
440 @section Release 6.5.0
444 Fixed segfault in @command{nncp-daemon} when SP handshake did not succeed.
447 Fixed possible bad return code ignoring in automatic tosser.
450 Fixed race during file descriptors closing when online protocol call is
451 finished, that could lead to write error of received packet fragment.
454 Kill all packet transmission progress bars in @command{nncp-daemon},
455 @command{nncp-call} and @command{nncp-caller} when call is finished.
460 @section Release 6.4.0
464 Fixed possible race in online protocol, that lead to panic.
469 @section Release 6.3.0
473 Fixed possible panic while showing progress during online protocol.
478 @section Release 6.2.1
482 Three places in logs contained excess @code{%s}.
487 @section Release 6.2.0
491 Returned @command{nncp-caller}'s @option{-autotoss*} options workability.
494 Yet another logging refactoring and simplification.
495 Should be no visible differences to the end user.
500 @section Release 6.1.0
504 Optimization: most commands do not keep opened file descriptors now.
505 Previously you can exceed maximal number of opened files if you have got
506 many packets in the spool directory.
509 Optimization: do not close file descriptor of the file we download
510 online. Previously each chunk lead to expensive open/close calls.
513 Online downloaded files are saved with @file{.nock} (non-checksummed)
514 suffix, waiting either for @command{nncp-check}, or online daemons to
515 perform integrity check.
518 Optimization: files, that are not resumed, are checksummed immediately
519 during the online download, skipping @file{.nock}-intermediate step.
522 Ability to store encrypted packet's header in @file{.hdr} file, close to
523 the packet itself. That can greatly increase performance of packets
524 listing on filesystems with big block's size.
529 @section Release 6.0.0
533 Log uses human readable and easy machine parseable
534 @url{https://www.gnu.org/software/recutils/, recfile} format for the
535 records, instead of structured RFC 3339 lines. Old logs are not readable
536 by @command{nncp-log} anymore.
539 @option{-autotoss*} option workability with @command{nncp-daemon}'s
540 @option{-inetd} mode.
543 Call's @option{when-tx-exists} allows to make a call only when outbound
544 packets exists. Combined with seconds-aware cron expression that can be
545 used as some kind of auto dialler.
548 @command{nncp-cronexpr} command allows you to check validity and
549 expectations of specified cron expression.
554 @section Release 5.6.0
558 @option{-autotoss*} option runs tosser not after the call, but every
559 second while it is active.
562 @option{autotoss}, @option{autotoss-doseen},
563 @option{autotoss-nofile}, @option{autotoss-nofreq},
564 @option{autotoss-noexec}, @option{autotoss-notrns} options available in
565 @option{calls} configuration section. You can configure per-call
566 automatic tosser options.
569 Use vendoring, instead of @env{$GOPATH} overriding during tarball
570 installation, because current minimal Go's version is 1.12 and it
576 @section Release 5.5.1
580 Respect for @env{$BINDIR}, @env{$INFODIR} and @env{$DOCDIR} environment
581 variables in @file{config} during installation.
586 @section Release 5.5.0
590 Bugfixes in @command{nncp-call(er)}/@command{nncp-daemon},
591 @command{nncp-bundle} and @command{nncp-stat}.
594 @command{nncp-rm} has @option{-dryrun} and @option{-older} options now.
597 @command{nncp-exec} has @option{-use-tmp} and @option{-nocompress}
598 options now. Uncompressed packets are not compatible with previous NNCP
602 @command{nncp-call}, @command{nncp-caller} and @command{nncp-daemon} commands
603 have @option{-autotoss*} options for running tosser after call is ended.
606 Updated dependencies. Minimal required Go version is 1.12.
611 @section Release 5.4.1
615 Fixed @code{SENDMAIL} variable usage during the build.
620 @section Release 5.4.0
624 Updated dependencies.
627 Build system is moved from Makefiles to @url{http://cr.yp.to/redo.html, redo}.
628 This should not influence package maintainers, because minimal @command{redo}
629 implementation is included in tarball.
634 @section Release 5.3.3
638 More various error checks.
641 Updated dependencies.
646 @section Release 5.3.2
650 Fixed incorrect logic of @option{onlinedeadline} timeout, where
651 connection won't take into account incoming packets events and will
652 forcefully disconnect.
657 @section Release 5.3.1
661 Fixed @option{onlinedeadline} workability with call addresses that use
662 external commands (@verb{#"|somecmd"#}).
665 @command{nncp-stat} has @option{-pkt} option displaying information
666 about each packet in the spool.
671 @section Release 5.3.0
675 Progress messages contain prefix, describing the running action.
678 Fixed not occurring handshake messages padding.
681 Finish all SP protocol related goroutines, less memory leak.
684 SP protocol generates less socket write calls, thus generating less TCP
688 Check @option{onlinedeadline} and @option{maxonlinetime} options every
689 second, independently from socket reads (up to 10 seconds).
692 Once per minute, if no other traffic exists, PING packets are sent in
693 SP-connection. That allows faster determining of connection unworkability.
696 @command{nncp-toss} uses lock-file to prevent simultaneous tossing.
701 @section Release 5.2.1
705 Fixed SP protocol error handling, sometimes causing program panic.
710 @section Release 5.2.0
714 Most commands by default show oneline operations progress.
715 @option{-progress}, @option{-noprogress} command line options,
716 @option{noprogress} configuration file option appeared.
719 Fixed incorrect @command{nncp-check} command return code, that returned
720 bad code when everything is good.
723 Free disk space check during @command{nncp-bundle -rx} call.
728 @section Release 5.1.2
732 @strong{Critical} vulnerability: remote peers authentication could lead
733 to incorrect identification of remote side, allowing foreign encrypted
737 Bugfix: private and public Noise keys were swapped in newly created
738 configuration files, that lead to inability to authenticate online peers.
741 Explicit directories @code{fsync}-ing for guaranteed files renaming.
746 @section Release 5.1.1
750 Fixed workability of @command{nncp-file} with @option{-chunked 0} option.
755 @section Release 5.1.0
759 @command{nncp-file} can send directories, automatically creating pax
763 Free disk space is checked during outbound packets creation.
766 @option{freq}, @option{freqminsize}, @option{freqchunked} configuration
767 file options replaced with the structure:
768 @option{freq: @{path: @dots{}, minsize: @dots{}, chunked: @dots{}@}}.
771 Added @option{freq.maxsize} configuration file option, forbidding of
772 freq sending larger than specified size.
775 Ability to notify about successfully executed commands (exec) with
776 @option{notify.exec} configuration file option.
781 @section Release 5.0.0
785 @strong{Incompatible} configuration file format change: YAML is
786 replaced with Hjson, due to its simplicity, without noticeable lack
787 of either functionality or convenience.
790 @strong{Incompatible} plain packet format changes. Older versions are
791 not supported. @code{zlib} compression is replaced with
792 @code{Zstandard}, due to its speed and efficiency, despite library
793 version is not mature enough.
796 Ability to call remote nodes via pipe call of external command, not only
800 @command{nncp-cfgnew} generates configuration file with many
801 comments. @option{-nocomments} option can be used for an old
805 Duplicate filenames have @file{.CTR} suffix, instead of @file{CTR}, to
806 avoid possible collisions with @file{.nncp.chunkCTR}.
809 Ability to override process umask through configuration file option.
812 Files and directories are created with 666/777 permissions by default,
813 allowing control with @command{umask}.
816 Updated dependencies.
819 Full usage of go modules for dependencies management
820 (@code{go.cypherpunks.ru/nncp/v5} namespace is used).
823 Forbid any later GNU GPL version autousage
824 (project's licence now is GNU GPLv3-only).
831 @item Workability on GNU/Linux systems and Go 1.10 is fixed.
839 @strong{Incompatible} encrypted and eblob packet format change: AEAD
840 encryption mode with 128 KiB blocks is used now, because previously
841 @command{nncp-toss} did not verify encrypted packet's MAC before feeding
842 decrypted data to external command. Older versions are not supported.
845 Available free space checking before copying in @command{nncp-xfer},
846 @command{nncp-daemon}, @command{nncp-call(er)}.
849 @command{nncp-call} has ability only to list packets on remote node,
850 without their transmission.
853 @command{nncp-call} has ability to transfer only specified packets.
856 Workability of @option{xxrate} preference in @option{calls}
857 configuration file section.
860 Dependant libraries are updated.
866 Begin using of @code{go.mod} subsystem.
873 @item @command{nncp-daemon} can be run as @command{inetd}-service.
881 @command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller} check
882 if @file{.seen} exists and treat it like file was already downloaded.
883 Possibly it was transferred out-of-bound and remote side needs to be
887 If higher priority packet is spooled, then @command{nncp-daemon} will
888 queue its sending first, interrupting lower priority transmissions.
891 Simple packet rate limiter added to online-related tools
892 (@command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller}).
895 Ability to specify niceness with symbolic notation:
896 @verb{|NORMAL|}, @verb{|BULK+10|}, @verb{|PRIORITY-5|}, etc.
899 Changed default niceness levels:
900 for @command{nncp-exec} from 64 to 96,
901 for @command{nncp-freq} from 64 to 160,
902 for @command{nncp-file} from 196 to 224.
910 @strong{Incompatible} @emph{bundle} archive format changes and
911 @command{nncp-bundle} workability with Go 1.10+. Bundles must be
912 valid tar archives, but Go 1.9 made them invalid because of long paths
913 inside. NNCP accidentally was dependant on that bug. Explicit adding of
914 @file{NNCP/} directory in archive restores workability with valid tar
922 Ability to disable relaying at all using @verb{|-via -|} command line option.
930 @strong{Incompatible} plain packet format changes. Older versions are
934 Ability to queue remote command execution, by configuring @option{exec}
935 option in configuration file and using @command{nncp-exec} command:
938 @command{nncp-mail} command is replaced with more flexible
939 @command{nncp-exec}. Instead of @verb{|nncp-mail NODE RECIPIENT|}
940 you must use @verb{|nncp-exec NODE sendmail RECIPIENT|}.
942 @option{sendmail} configuration file option is replaced with
943 @option{exec}. @code{sendmail: [@dots{}]} must be replaced with
944 @code{exec: sendmail: [@dots{}]}.
948 Ability to override @option{via} configuration option for destination
949 node via @option{-via} command line option for following commands:
950 @command{nncp-file}, @command{nncp-freq}, @command{nncp-exec}.
953 Chunked files, having size less than specified chunk size, will be sent
954 as an ordinary single file.
957 Exec commands are invoked with additional @env{$NNCP_NICE} and
958 @env{$NNCP_SELF} environment variables.
961 Files, that are sent as a reply to freq, have niceness level taken from
962 the freq packet. You can set desired niceness during @command{nncp-freq}
963 invocation using @option{-replynice} option.
966 @command{nncp-toss} command can ignore specified packet types during
967 processing: @option{-nofile}, @option{-nofreq}, @option{-noexec},
971 @command{nncp-file} command uses
972 @option{FreqMinSize}/@option{FreqChunked} configuration file options
973 for @option{-minsize}/@option{-chunked} by default. You can turn this
974 off by specifying zero value.
983 @strong{Incompatible} encrypted/eblob packet format changes. Older
984 versions are not supported.
987 Twofish encryption algorithm is replaced with ChaCha20. It is much more
988 faster. One cryptographic primitive less.
991 HKDF-BLAKE2b-256 KDF algorithm is replaced with BLAKE2Xb XOF. Yet
992 another cryptographic primitive less (assuming that BLAKE2X is nearly
993 identical to BLAKE2).
1002 @strong{Incompatible} encrypted packet format changes. Older versions
1006 @command{nncp-bundle} command can either create stream of encrypted
1007 packets, or digest it. It is useful when dealing with
1008 @code{stdin}/@code{stdout} based transmission methods (like writing to
1009 CD-ROM without intermediate prepared ISO image and working with tape
1013 @command{nncp-toss} is able to create @file{.seen} files preventing
1014 duplicate packets receiving.
1017 Single background checksum verifier worker is allowed in
1018 @command{nncp-call}. This is helpful when thousands of small inbound
1019 packets could create many goroutines.
1022 Ability to override path to spool directory and logfile through either
1023 command line argument, or environment variable.
1026 @command{nncp-rm} is able to delete outbound/inbound, @file{.seen},
1027 @file{.part}, @file{.lock} and temporary files.
1032 @section Release 0.12
1034 @item Sendmail command is called with @env{$NNCP_SENDER} environment variable.
1038 @section Release 0.11
1040 @item @command{nncp-stat}'s command output is sorted by node name.
1044 @section Release 0.10
1047 @command{nncp-freq}'s @file{DST} argument is optional now. Last
1048 @file{SRC} path's element will be used by default.
1052 @section Release 0.9
1055 Fix @option{-rx}/@option{-tx} arguments processing in
1056 @command{nncp-call} command. They were ignored.
1060 @section Release 0.8
1063 Little bugfix in @command{nncp-file} command, where @option{-minsize}
1064 option for unchunked transfer was not in KiBs, but in bytes.
1068 @section Release 0.7
1072 Ability to feed @command{nncp-file} from @code{stdin}, that uses an
1073 encrypted temporary file for that.
1076 Chunked files transmission appeared with corresponding
1077 @command{nncp-reass} command and @option{freqchunked} configuration file
1078 entry. Useful for transferring big files over small storage devices.
1081 @option{freqminsize} configuration file option, analogue to
1082 @option{-minsize} one.
1085 @command{nncp-xfer}'s @option{-force} option is renamed to
1086 @option{-mkdir} for clarity.
1089 @option{-minsize} option is specified in KiBs, not bytes, for
1093 @command{nncp-newcfg} command is renamed to @command{nncp-cfgnew},
1094 and @command{nncp-mincfg} to @command{nncp-cfgmin} -- now they have
1095 common prefix and are grouped together for convenience.
1098 @command{nncp-cfgenc} command appeared, allowing configuration file
1099 encryption/decryption, for keeping it safe without any either OpenPGP or
1100 similar tools usage.
1103 Cryptographic libraries (dependencies) are updated.
1108 @section Release 0.6
1110 @item Small @command{nncp-rm} command appeared.
1111 @item Cryptographic libraries (dependencies) are updated.
1115 @section Release 0.5
1118 Trivial small fix in default niceness level of @command{nncp-file}
1119 and @command{nncp-freq} commands.
1123 @section Release 0.4
1127 Small fix in @command{nncp-call}, @command{nncp-caller},
1128 @command{nncp-daemon}: they can segmentation fail sometimes (no data is
1132 @command{nncp-newnode} renamed to @command{nncp-newcfg} -- it is shorter
1133 and more convenient to use.
1136 @command{nncp-mincfg} command appeared: helper allowing to create
1137 minimalistic stripped down configuration file without private keys, that
1138 is useful during @command{nncp-xfer} usage.
1143 @section Release 0.3
1145 @item Fixed compatibility with Go 1.6.
1149 @section Release 0.2
1153 @strong{Incompatible} packet's format change (magic number is changed
1154 too): size field is encrypted and is not send in plaintext anymore.
1157 @option{-minsize} option gives ability to automatically pad outgoing
1158 packets to specified minimal size.
1161 @command{nncp-daemon} and @command{nncp-call}/@command{nncp-caller}
1162 always check new @emph{tx} packets appearance in the background while
1163 connected. Remote side is immediately notified.
1166 @option{-onlinedeadline} option gives ability to configure timeout of
1167 inactivity of online connection, when it could be disconnected. It could
1168 be used to keep connection alive for a long time.
1171 @option{-maxonlinetime} option gives ability to set maximal allowable
1172 online connection aliveness time.
1175 @command{nncp-caller} command appeared: cron-ed TCP daemon caller.
1178 @command{nncp-pkt} command can decompress the data.