5 See also this page @ref{Новости, on russian}.
12 Ability to turn @code{fsync} operation off using @env{$NNCPNOSYNC=1}
16 Added various indices in documentation, that should help searching in it.
21 @section Release 8.5.0
25 Fixed @command{nncp-bundle} workability.
28 Mistakenly @option{-mcd-wait} option was enabled by default in
32 Ability to override internal default timeout for online protocol through
33 @env{$NNCPDEADLINE} environment variable. Can be useful for very high
37 NNCP builds on OpenBSD.
42 @section Release 8.4.0
46 Multicast related interface names (@code{mcd-listen} and @code{mcd-send}
47 configuration options) are now regular expressions. By default
48 @command{nncp-cfgnew} uncomments them now with @code{.*} interface name.
51 @command{nncp-call} command has @option{-mcd-wait} option to wait for
52 multicast packet about node's address.
55 @command{nncp-file} command skips everything that is neither regular
56 file nor directory during pax-archive creation.
61 @section Release 8.3.0
65 Fixed building issues on 32-bit systems.
70 @section Release 8.2.0
74 Yggdrasil uses pure-Go IPv6+TCP network stack, instead of naked μTP
75 transport protocol, making it able to work as an ordinary TCP server
76 inside overlay network.
79 Yggdrasil's @code{prv;bind1,bind2;pub...}-like configuration strings are
80 replaced with URL-like ones (@code{yggdrasils://PRV?bind=BIND1&bind=BIND2&pub=PUB}).
83 Ability to pass multicast-related parameters to Yggdrasil configuration.
86 @command{nncp-daemon} is able to listen on both TCP and Yggdrasil-driven
87 sockets simultaneously.
90 @command{nncp-daemon}'s listening on peering endpoint socket is optional
91 -- you can be reached through the peers.
96 @section Release 8.1.0
100 @command{nncp-cfgdir} does not require @code{self} section existence in
104 Ability to act as Yggdrasil network client, using online protocol on top of it.
109 @section Release 8.0.2
113 Fixed sending ability to areas.
118 @section Release 8.0.1
122 Fixed incorrect @code{freq.chunked} value calculation. If it was missed,
123 then chunked transfer mode was forcefully turned on anyway.
126 Fixed incorrect full file's size calculation in @file{.nncp.meta}.
131 @section Release 8.0.0
135 @strong{Incompatible} encrypted packet format change: payload and pad
136 sizes are sent in-bound in the encrypted stream. That gives ability to
137 streamingly create encrypted packets, without knowing sizes in advance,
138 without creating temporary file or buffer data in memory.
141 Proper encrypted packet padding verification is done now. This is not
142 critical issue, but previously neither padding value, nor its size were
143 authenticated, giving ability to iteratively strip trailing bytes and
144 determine payload's size by observing the reaction of the encrypted
148 @command{nncp-exec} loses its @option{-use-tmp} option, because of
149 streaming-compatible encrypted packets format.
152 @command{nncp-file} and @command{nncp-exec} commands have
153 @option{-maxsize} option, limiting maximal resulting encrypted packet's
154 maximal size (returning error if it is exceeded). Could be useful,
155 because no payload size could be known in advance.
160 @section Release 7.7.0
164 Experimental @code{kqueue} and @code{inotify} based notifications
165 support about spool directory changes, for reducing their often reading
169 @file{.seen} and @file{.hdr} files moved to @file{seen/} and @file{hdr/}
170 subdirectories, for faster scanning of spool directories.
171 Current files migration required:
174 $ find $NNCPSPOOL -type f -name "*.hdr" -exec rm @{@} +
176 $ find $NNCPSPOOL -type d -name rx | while read rx ; do
179 find . -type f -name "*.seen" | while read fn ; do
180 mv $fn seen/$@{fn%.seen@}
184 $ find $NNCPSPOOL -type d -name area | while read area ; do
185 find $area -type f -name "*.seen" | while read fn ; do
194 @section Release 7.6.0
198 Logging may be done to specified opened file descriptor
199 (@env{$NNCPLOG=FD:5} for example).
200 That is friendly to use under @command{daemontools}.
203 Added additional checks of public keys existence in configuration file,
204 preventing some commands from failing.
209 @section Release 7.5.1
213 NNCP builds on NetBSD.
218 @section Release 7.5.0
222 @command{nncp-daemon} is compatible with UCSPI-TCP interface, so log
223 will contain remote side's address (when running under appropriate
224 utility). @option{-ucspi} option should be used instead of @option{-inetd}.
227 @command{nncp-call} can be UCSPI-TCP client, using @option{-ucspi} option.
230 Do not exit if some of MCD network interfaces can not be listened --
231 only warn about that.
236 @section Release 7.4.0
240 Fixed simultaneous @command{nncp-daemon} and @command{nncp-caller} MCD work.
245 @section Release 7.3.2
249 @command{hjson-cli} utility builds in vendor-mode now.
254 @section Release 7.3.1
258 Fixed possibly left opened file descriptor in online commands.
261 Severely decreased memory usage of MTH hashing.
266 @section Release 7.3.0
270 Fixed some workability problems on 32-bit systems with big files.
273 Ability to use directory with a bunch of files as a configuration.
274 @command{nncp-cfgdir} command appeared.
279 @section Release 7.2.1
283 Small optimizations in online commands.
288 @section Release 7.2.0
292 @command{nncp-trns} command appeared for manual transition packets creation.
295 If destination node of transitional packet has non empty @option{via}
296 route, then do not ignore, but use it.
299 Do not relay multicast packet to area message's originator, that
300 obviously has seen its own packet.
303 Much less memory usage during MTH hashing when offset is zero: when
304 packet is not resumed, but for example checked with @command{nncp-check}
310 @section Release 7.1.1
314 Fixed failing directories @code{fsync} after @file{.seen} file creation.
319 @section Release 7.1.0
323 Multicasting areas feature appeared. Implemented merely by an additional
324 plain packet type with @command{nncp-toss}, @command{nncp-file} and
325 @command{nncp-exec} commands modification.
328 Fixed workability of @command{nncp-file} and @command{nncp-exec}
329 commands, that use temporary file (stdin and @option{-use-tmp}).
332 Fixed disappearing bad return code in @command{nncp-exec} command.
335 Fixed invalid @file{.hdr} generation when transitional packets are used.
338 @option{-all} option appeared in @command{nncp-rm} command, applying to
339 all the nodes at once.
342 @option{-cycle} option appeared in @command{nncp-check} command, looping
343 the check in infinite cycle.
346 @command{nncp-rm} command can take node alias name.
349 @command{nncp-pkt} can parse @file{.hdr} files.
354 @section Release 7.0.0
358 Minimal required Go version 1.13.
361 Merkle Tree-based Hashing with BLAKE3 (MTH) is used instead of BLAKE2b.
362 Because of that, there are backward @strong{incompatible} changes of
363 encrypted files (everything laying in the spool directory) and
364 @file{.meta} files of chunked transfer.
366 Current implementation is far from being optimal: it lacks
367 parallelizable calculations and has higher memory consumption: nearly
368 512 KiB for each 1 GiB of file's data. Future performance and memory
369 size optimizations should not lead to packet's format change. But it is
370 still several times faster than BLAKE2b.
373 Resumed online downloads, because of MTH, require reading only of the
374 preceding part of file, not the whole one as was before.
377 @command{nncp-hash} utility appeared for calculating file's MTH hash.
380 BLAKE2 KDF and XOF functions are replaced with BLAKE3 in encrypted
381 packets. Lowering number of used primitives. Also, its encrypted
382 packet's header is used as an associated data during encryption.
385 MultiCast Discovery uses
386 @verb{|ff02::4e4e:4350|} address instead of @verb{|ff02::1|}.
389 @command{nncp-cfgenc} mistakenly asked passphrase three times during encryption.
392 @command{nncp-stat} reports about partly downloaded packets.
395 Updated dependencies.
400 @section Release 6.6.0
404 @command{nncp-daemon}, @command{nncp-call} and @command{nncp-caller}
405 commands wait for all background checksummers completion after
406 connection is finished.
409 Added possibility of address determining through multicast announcement
410 in local area network, so called MCD (MultiCast Discovery).
415 @section Release 6.5.0
419 Fixed segfault in @command{nncp-daemon} when SP handshake did not succeed.
422 Fixed possible bad return code ignoring in automatic tosser.
425 Fixed race during file descriptors closing when online protocol call is
426 finished, that could lead to write error of received packet fragment.
429 Kill all packet transmission progress bars in @command{nncp-daemon},
430 @command{nncp-call} and @command{nncp-caller} when call is finished.
435 @section Release 6.4.0
439 Fixed possible race in online protocol, that lead to panic.
444 @section Release 6.3.0
448 Fixed possible panic while showing progress during online protocol.
453 @section Release 6.2.1
457 Three places in logs contained excess @code{%s}.
462 @section Release 6.2.0
466 Returned @command{nncp-caller}'s @option{-autotoss*} options workability.
469 Yet another logging refactoring and simplification.
470 Should be no visible differences to the end user.
475 @section Release 6.1.0
479 Optimization: most commands do not keep opened file descriptors now.
480 Previously you can exceed maximal number of opened files if you have got
481 many packets in the spool directory.
484 Optimization: do not close file descriptor of the file we download
485 online. Previously each chunk lead to expensive open/close calls.
488 Online downloaded files are saved with @file{.nock} (non-checksummed)
489 suffix, waiting either for @command{nncp-check}, or online daemons to
490 perform integrity check.
493 Optimization: files, that are not resumed, are checksummed immediately
494 during the online download, skipping @file{.nock}-intermediate step.
497 Ability to store encrypted packet's header in @file{.hdr} file, close to
498 the packet itself. That can greatly increase performance of packets
499 listing on filesystems with big block's size.
504 @section Release 6.0.0
508 Log uses human readable and easy machine parseable
509 @url{https://www.gnu.org/software/recutils/, recfile} format for the
510 records, instead of structured RFC 3339 lines. Old logs are not readable
511 by @command{nncp-log} anymore.
514 @option{-autotoss*} option workability with @command{nncp-daemon}'s
515 @option{-inetd} mode.
518 Call's @option{when-tx-exists} allows to make a call only when outbound
519 packets exists. Combined with seconds-aware cron expression that can be
520 used as some kind of auto dialler.
523 @command{nncp-cronexpr} command allows you to check validity and
524 expectations of specified cron expression.
529 @section Release 5.6.0
533 @option{-autotoss*} option runs tosser not after the call, but every
534 second while it is active.
537 @option{autotoss}, @option{autotoss-doseen},
538 @option{autotoss-nofile}, @option{autotoss-nofreq},
539 @option{autotoss-noexec}, @option{autotoss-notrns} options available in
540 @option{calls} configuration section. You can configure per-call
541 automatic tosser options.
544 Use vendoring, instead of @env{$GOPATH} overriding during tarball
545 installation, because current minimal Go's version is 1.12 and it
551 @section Release 5.5.1
555 Respect for @env{$BINDIR}, @env{$INFODIR} and @env{$DOCDIR} environment
556 variables in @file{config} during installation.
561 @section Release 5.5.0
565 Bugfixes in @command{nncp-call(er)}/@command{nncp-daemon},
566 @command{nncp-bundle} and @command{nncp-stat}.
569 @command{nncp-rm} has @option{-dryrun} and @option{-older} options now.
572 @command{nncp-exec} has @option{-use-tmp} and @option{-nocompress}
573 options now. Uncompressed packets are not compatible with previous NNCP
577 @command{nncp-call}, @command{nncp-caller} and @command{nncp-daemon} commands
578 have @option{-autotoss*} options for running tosser after call is ended.
581 Updated dependencies. Minimal required Go version is 1.12.
586 @section Release 5.4.1
590 Fixed @code{SENDMAIL} variable usage during the build.
595 @section Release 5.4.0
599 Updated dependencies.
602 Build system is moved from Makefiles to @url{http://cr.yp.to/redo.html, redo}.
603 This should not influence package maintainers, because minimal @command{redo}
604 implementation is included in tarball.
609 @section Release 5.3.3
613 More various error checks.
616 Updated dependencies.
621 @section Release 5.3.2
625 Fixed incorrect logic of @option{onlinedeadline} timeout, where
626 connection won't take into account incoming packets events and will
627 forcefully disconnect.
632 @section Release 5.3.1
636 Fixed @option{onlinedeadline} workability with call addresses that use
637 external commands (@verb{#"|somecmd"#}).
640 @command{nncp-stat} has @option{-pkt} option displaying information
641 about each packet in the spool.
646 @section Release 5.3.0
650 Progress messages contain prefix, describing the running action.
653 Fixed not occurring handshake messages padding.
656 Finish all SP protocol related goroutines, less memory leak.
659 SP protocol generates less socket write calls, thus generating less TCP
663 Check @option{onlinedeadline} and @option{maxonlinetime} options every
664 second, independently from socket reads (up to 10 seconds).
667 Once per minute, if no other traffic exists, PING packets are sent in
668 SP-connection. That allows faster determining of connection unworkability.
671 @command{nncp-toss} uses lock-file to prevent simultaneous tossing.
676 @section Release 5.2.1
680 Fixed SP protocol error handling, sometimes causing program panic.
685 @section Release 5.2.0
689 Most commands by default show oneline operations progress.
690 @option{-progress}, @option{-noprogress} command line options,
691 @option{noprogress} configuration file option appeared.
694 Fixed incorrect @command{nncp-check} command return code, that returned
695 bad code when everything is good.
698 Free disk space check during @command{nncp-bundle -rx} call.
703 @section Release 5.1.2
707 @strong{Critical} vulnerability: remote peers authentication could lead
708 to incorrect identification of remote side, allowing foreign encrypted
712 Bugfix: private and public Noise keys were swapped in newly created
713 configuration files, that lead to inability to authenticate online peers.
716 Explicit directories @code{fsync}-ing for guaranteed files renaming.
721 @section Release 5.1.1
725 Fixed workability of @command{nncp-file} with @option{-chunked 0} option.
730 @section Release 5.1.0
734 @command{nncp-file} can send directories, automatically creating pax
738 Free disk space is checked during outbound packets creation.
741 @option{freq}, @option{freqminsize}, @option{freqchunked} configuration
742 file options replaced with the structure:
743 @option{freq: @{path: @dots{}, minsize: @dots{}, chunked: @dots{}@}}.
746 Added @option{freq.maxsize} configuration file option, forbidding of
747 freq sending larger than specified size.
750 Ability to notify about successfully executed commands (exec) with
751 @option{notify.exec} configuration file option.
756 @section Release 5.0.0
760 @strong{Incompatible} configuration file format change: YAML is
761 replaced with Hjson, due to its simplicity, without noticeable lack
762 of either functionality or convenience.
765 @strong{Incompatible} plain packet format changes. Older versions are
766 not supported. @code{zlib} compression is replaced with
767 @code{Zstandard}, due to its speed and efficiency, despite library
768 version is not mature enough.
771 Ability to call remote nodes via pipe call of external command, not only
775 @command{nncp-cfgnew} generates configuration file with many
776 comments. @option{-nocomments} option can be used for an old
780 Duplicate filenames have @file{.CTR} suffix, instead of @file{CTR}, to
781 avoid possible collisions with @file{.nncp.chunkCTR}.
784 Ability to override process umask through configuration file option.
787 Files and directories are created with 666/777 permissions by default,
788 allowing control with @command{umask}.
791 Updated dependencies.
794 Full usage of go modules for dependencies management
795 (@code{go.cypherpunks.ru/nncp/v5} namespace is used).
798 Forbid any later GNU GPL version autousage
799 (project's licence now is GNU GPLv3-only).
806 @item Workability on GNU/Linux systems and Go 1.10 is fixed.
814 @strong{Incompatible} encrypted and eblob packet format change: AEAD
815 encryption mode with 128 KiB blocks is used now, because previously
816 @command{nncp-toss} did not verify encrypted packet's MAC before feeding
817 decrypted data to external command. Older versions are not supported.
820 Available free space checking before copying in @command{nncp-xfer},
821 @command{nncp-daemon}, @command{nncp-call(er)}.
824 @command{nncp-call} has ability only to list packets on remote node,
825 without their transmission.
828 @command{nncp-call} has ability to transfer only specified packets.
831 Workability of @option{xxrate} preference in @option{calls}
832 configuration file section.
835 Dependant libraries are updated.
841 Begin using of @code{go.mod} subsystem.
848 @item @command{nncp-daemon} can be run as @command{inetd}-service.
856 @command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller} check
857 if @file{.seen} exists and treat it like file was already downloaded.
858 Possibly it was transferred out-of-bound and remote side needs to be
862 If higher priority packet is spooled, then @command{nncp-daemon} will
863 queue its sending first, interrupting lower priority transmissions.
866 Simple packet rate limiter added to online-related tools
867 (@command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller}).
870 Ability to specify niceness with symbolic notation:
871 @verb{|NORMAL|}, @verb{|BULK+10|}, @verb{|PRIORITY-5|}, etc.
874 Changed default niceness levels:
875 for @command{nncp-exec} from 64 to 96,
876 for @command{nncp-freq} from 64 to 160,
877 for @command{nncp-file} from 196 to 224.
885 @strong{Incompatible} @emph{bundle} archive format changes and
886 @command{nncp-bundle} workability with Go 1.10+. Bundles must be
887 valid tar archives, but Go 1.9 made them invalid because of long paths
888 inside. NNCP accidentally was dependant on that bug. Explicit adding of
889 @file{NNCP/} directory in archive restores workability with valid tar
897 Ability to disable relaying at all using @verb{|-via -|} command line option.
905 @strong{Incompatible} plain packet format changes. Older versions are
909 Ability to queue remote command execution, by configuring @option{exec}
910 option in configuration file and using @command{nncp-exec} command:
913 @command{nncp-mail} command is replaced with more flexible
914 @command{nncp-exec}. Instead of @verb{|nncp-mail NODE RECIPIENT|}
915 you must use @verb{|nncp-exec NODE sendmail RECIPIENT|}.
917 @option{sendmail} configuration file option is replaced with
918 @option{exec}. @verb{|sendmail: [...]|} must be replaced with
919 @verb{|exec: sendmail: [...]|}.
923 Ability to override @option{via} configuration option for destination
924 node via @option{-via} command line option for following commands:
925 @command{nncp-file}, @command{nncp-freq}, @command{nncp-exec}.
928 Chunked files, having size less than specified chunk size, will be sent
929 as an ordinary single file.
932 Exec commands are invoked with additional @env{$NNCP_NICE} and
933 @env{$NNCP_SELF} environment variables.
936 Files, that are sent as a reply to freq, have niceness level taken from
937 the freq packet. You can set desired niceness during @command{nncp-freq}
938 invocation using @option{-replynice} option.
941 @command{nncp-toss} command can ignore specified packet types during
942 processing: @option{-nofile}, @option{-nofreq}, @option{-noexec},
946 @command{nncp-file} command uses
947 @option{FreqMinSize}/@option{FreqChunked} configuration file options
948 for @option{-minsize}/@option{-chunked} by default. You can turn this
949 off by specifying zero value.
958 @strong{Incompatible} encrypted/eblob packet format changes. Older
959 versions are not supported.
962 Twofish encryption algorithm is replaced with ChaCha20. It is much more
963 faster. One cryptographic primitive less.
966 HKDF-BLAKE2b-256 KDF algorithm is replaced with BLAKE2Xb XOF. Yet
967 another cryptographic primitive less (assuming that BLAKE2X is nearly
968 identical to BLAKE2).
977 @strong{Incompatible} encrypted packet format changes. Older versions
981 @command{nncp-bundle} command can either create stream of encrypted
982 packets, or digest it. It is useful when dealing with
983 @code{stdin}/@code{stdout} based transmission methods (like writing to
984 CD-ROM without intermediate prepared ISO image and working with tape
988 @command{nncp-toss} is able to create @file{.seen} files preventing
989 duplicate packets receiving.
992 Single background checksum verifier worker is allowed in
993 @command{nncp-call}. This is helpful when thousands of small inbound
994 packets could create many goroutines.
997 Ability to override path to spool directory and logfile through either
998 command line argument, or environment variable.
1001 @command{nncp-rm} is able to delete outbound/inbound, @file{.seen},
1002 @file{.part}, @file{.lock} and temporary files.
1007 @section Release 0.12
1009 @item Sendmail command is called with @env{$NNCP_SENDER} environment variable.
1013 @section Release 0.11
1015 @item @command{nncp-stat}'s command output is sorted by node name.
1019 @section Release 0.10
1022 @command{nncp-freq}'s @file{DST} argument is optional now. Last
1023 @file{SRC} path's element will be used by default.
1027 @section Release 0.9
1030 Fix @option{-rx}/@option{-tx} arguments processing in
1031 @command{nncp-call} command. They were ignored.
1035 @section Release 0.8
1038 Little bugfix in @command{nncp-file} command, where @option{-minsize}
1039 option for unchunked transfer was not in KiBs, but in bytes.
1043 @section Release 0.7
1047 Ability to feed @command{nncp-file} from @code{stdin}, that uses an
1048 encrypted temporary file for that.
1051 Chunked files transmission appeared with corresponding
1052 @command{nncp-reass} command and @option{freqchunked} configuration file
1053 entry. Useful for transferring big files over small storage devices.
1056 @option{freqminsize} configuration file option, analogue to
1057 @option{-minsize} one.
1060 @command{nncp-xfer}'s @option{-force} option is renamed to
1061 @option{-mkdir} for clarity.
1064 @option{-minsize} option is specified in KiBs, not bytes, for
1068 @command{nncp-newcfg} command is renamed to @command{nncp-cfgnew},
1069 and @command{nncp-mincfg} to @command{nncp-cfgmin} -- now they have
1070 common prefix and are grouped together for convenience.
1073 @command{nncp-cfgenc} command appeared, allowing configuration file
1074 encryption/decryption, for keeping it safe without any either OpenPGP or
1075 similar tools usage.
1078 Cryptographic libraries (dependencies) are updated.
1083 @section Release 0.6
1085 @item Small @command{nncp-rm} command appeared.
1086 @item Cryptographic libraries (dependencies) are updated.
1090 @section Release 0.5
1093 Trivial small fix in default niceness level of @command{nncp-file}
1094 and @command{nncp-freq} commands.
1098 @section Release 0.4
1102 Small fix in @command{nncp-call}, @command{nncp-caller},
1103 @command{nncp-daemon}: they can segmentation fail sometimes (no data is
1107 @command{nncp-newnode} renamed to @command{nncp-newcfg} -- it is shorter
1108 and more convenient to use.
1111 @command{nncp-mincfg} command appeared: helper allowing to create
1112 minimalistic stripped down configuration file without private keys, that
1113 is useful during @command{nncp-xfer} usage.
1118 @section Release 0.3
1120 @item Fixed compatibility with Go 1.6.
1124 @section Release 0.2
1128 @strong{Incompatible} packet's format change (magic number is changed
1129 too): size field is encrypted and is not send in plaintext anymore.
1132 @option{-minsize} option gives ability to automatically pad outgoing
1133 packets to specified minimal size.
1136 @command{nncp-daemon} and @command{nncp-call}/@command{nncp-caller}
1137 always check new @emph{tx} packets appearance in the background while
1138 connected. Remote side is immediately notified.
1141 @option{-onlinedeadline} option gives ability to configure timeout of
1142 inactivity of online connection, when it could be disconnected. It could
1143 be used to keep connection alive for a long time.
1146 @option{-maxonlinetime} option gives ability to set maximal allowable
1147 online connection aliveness time.
1150 @command{nncp-caller} command appeared: cron-ed TCP daemon caller.
1153 @command{nncp-pkt} command can decompress the data.