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.
19 @command{nncp-rm} now takes list of packet from @code{stdin} when
20 @option{-pkt} option is used.
25 @section Release 8.6.0
29 @command{nncp-xfer} checks if locally copied packet's checksum differs
30 from the source's one.
33 @command{nncp-call} has bad return code if its queues contain unfinished jobs.
36 @command{nncp-ack} command appeared, that sends explicit packet receipt
37 acknowledgement (ACK packet). That acknowledgement deletes referenced
38 packet from the outbound spool.
41 Ability to turn @code{fsync} operation off using @env{$NNCPNOSYNC=1}
45 Added various indices in documentation, that should help searching in it.
50 @section Release 8.5.0
54 Fixed @command{nncp-bundle} workability.
57 Mistakenly @option{-mcd-wait} option was enabled by default in
61 Ability to override internal default timeout for online protocol through
62 @env{$NNCPDEADLINE} environment variable. Can be useful for very high
66 NNCP builds on OpenBSD.
71 @section Release 8.4.0
75 Multicast related interface names (@code{mcd-listen} and @code{mcd-send}
76 configuration options) are now regular expressions. By default
77 @command{nncp-cfgnew} uncomments them now with @code{.*} interface name.
80 @command{nncp-call} command has @option{-mcd-wait} option to wait for
81 multicast packet about node's address.
84 @command{nncp-file} command skips everything that is neither regular
85 file nor directory during pax-archive creation.
90 @section Release 8.3.0
94 Fixed building issues on 32-bit systems.
99 @section Release 8.2.0
103 Yggdrasil uses pure-Go IPv6+TCP network stack, instead of naked μTP
104 transport protocol, making it able to work as an ordinary TCP server
105 inside overlay network.
108 Yggdrasil's @code{prv;bind1,bind2;pub@dots{}}-like configuration strings are
109 replaced with URL-like ones (@code{yggdrasils://PRV?bind=BIND1&bind=BIND2&pub=PUB}).
112 Ability to pass multicast-related parameters to Yggdrasil configuration.
115 @command{nncp-daemon} is able to listen on both TCP and Yggdrasil-driven
116 sockets simultaneously.
119 @command{nncp-daemon}'s listening on peering endpoint socket is optional
120 -- you can be reached through the peers.
125 @section Release 8.1.0
129 @command{nncp-cfgdir} does not require @code{self} section existence in
133 Ability to act as Yggdrasil network client, using online protocol on top of it.
138 @section Release 8.0.2
142 Fixed sending ability to areas.
147 @section Release 8.0.1
151 Fixed incorrect @code{freq.chunked} value calculation. If it was missed,
152 then chunked transfer mode was forcefully turned on anyway.
155 Fixed incorrect full file's size calculation in @file{.nncp.meta}.
160 @section Release 8.0.0
164 @strong{Incompatible} encrypted packet format change: payload and pad
165 sizes are sent in-bound in the encrypted stream. That gives ability to
166 streamingly create encrypted packets, without knowing sizes in advance,
167 without creating temporary file or buffer data in memory.
170 Proper encrypted packet padding verification is done now. This is not
171 critical issue, but previously neither padding value, nor its size were
172 authenticated, giving ability to iteratively strip trailing bytes and
173 determine payload's size by observing the reaction of the encrypted
177 @command{nncp-exec} loses its @option{-use-tmp} option, because of
178 streaming-compatible encrypted packets format.
181 @command{nncp-file} and @command{nncp-exec} commands have
182 @option{-maxsize} option, limiting maximal resulting encrypted packet's
183 maximal size (returning error if it is exceeded). Could be useful,
184 because no payload size could be known in advance.
189 @section Release 7.7.0
193 Experimental @code{kqueue} and @code{inotify} based notifications
194 support about spool directory changes, for reducing their often reading
198 @file{.seen} and @file{.hdr} files moved to @file{seen/} and @file{hdr/}
199 subdirectories, for faster scanning of spool directories.
200 Current files migration required:
203 $ find $NNCPSPOOL -type f -name "*.hdr" -exec rm @{@} +
205 $ find $NNCPSPOOL -type d -name rx | while read rx ; do
208 find . -type f -name "*.seen" | while read fn ; do
209 mv $fn seen/$@{fn%.seen@}
213 $ find $NNCPSPOOL -type d -name area | while read area ; do
214 find $area -type f -name "*.seen" | while read fn ; do
223 @section Release 7.6.0
227 Logging may be done to specified opened file descriptor
228 (@env{$NNCPLOG=FD:5} for example).
229 That is friendly to use under @command{daemontools}.
232 Added additional checks of public keys existence in configuration file,
233 preventing some commands from failing.
238 @section Release 7.5.1
242 NNCP builds on NetBSD.
247 @section Release 7.5.0
251 @command{nncp-daemon} is compatible with UCSPI-TCP interface, so log
252 will contain remote side's address (when running under appropriate
253 utility). @option{-ucspi} option should be used instead of @option{-inetd}.
256 @command{nncp-call} can be UCSPI-TCP client, using @option{-ucspi} option.
259 Do not exit if some of MCD network interfaces can not be listened --
260 only warn about that.
265 @section Release 7.4.0
269 Fixed simultaneous @command{nncp-daemon} and @command{nncp-caller} MCD work.
274 @section Release 7.3.2
278 @command{hjson-cli} utility builds in vendor-mode now.
283 @section Release 7.3.1
287 Fixed possibly left opened file descriptor in online commands.
290 Severely decreased memory usage of MTH hashing.
295 @section Release 7.3.0
299 Fixed some workability problems on 32-bit systems with big files.
302 Ability to use directory with a bunch of files as a configuration.
303 @command{nncp-cfgdir} command appeared.
308 @section Release 7.2.1
312 Small optimizations in online commands.
317 @section Release 7.2.0
321 @command{nncp-trns} command appeared for manual transition packets creation.
324 If destination node of transitional packet has non empty @option{via}
325 route, then do not ignore, but use it.
328 Do not relay multicast packet to area message's originator, that
329 obviously has seen its own packet.
332 Much less memory usage during MTH hashing when offset is zero: when
333 packet is not resumed, but for example checked with @command{nncp-check}
339 @section Release 7.1.1
343 Fixed failing directories @code{fsync} after @file{.seen} file creation.
348 @section Release 7.1.0
352 Multicasting areas feature appeared. Implemented merely by an additional
353 plain packet type with @command{nncp-toss}, @command{nncp-file} and
354 @command{nncp-exec} commands modification.
357 Fixed workability of @command{nncp-file} and @command{nncp-exec}
358 commands, that use temporary file (@code{stdin} and @option{-use-tmp}).
361 Fixed disappearing bad return code in @command{nncp-exec} command.
364 Fixed invalid @file{.hdr} generation when transitional packets are used.
367 @option{-all} option appeared in @command{nncp-rm} command, applying to
368 all the nodes at once.
371 @option{-cycle} option appeared in @command{nncp-check} command, looping
372 the check in infinite cycle.
375 @command{nncp-rm} command can take node alias name.
378 @command{nncp-pkt} can parse @file{.hdr} files.
383 @section Release 7.0.0
387 Minimal required Go version 1.13.
390 Merkle Tree-based Hashing with BLAKE3 (MTH) is used instead of BLAKE2b.
391 Because of that, there are backward @strong{incompatible} changes of
392 encrypted files (everything laying in the spool directory) and
393 @file{.meta} files of chunked transfer.
395 Current implementation is far from being optimal: it lacks
396 parallelizable calculations and has higher memory consumption: nearly
397 512 KiB for each 1 GiB of file's data. Future performance and memory
398 size optimizations should not lead to packet's format change. But it is
399 still several times faster than BLAKE2b.
402 Resumed online downloads, because of MTH, require reading only of the
403 preceding part of file, not the whole one as was before.
406 @command{nncp-hash} utility appeared for calculating file's MTH hash.
409 BLAKE2 KDF and XOF functions are replaced with BLAKE3 in encrypted
410 packets. Lowering number of used primitives. Also, its encrypted
411 packet's header is used as an associated data during encryption.
414 MultiCast Discovery uses
415 @verb{|ff02::4e4e:4350|} address instead of @verb{|ff02::1|}.
418 @command{nncp-cfgenc} mistakenly asked passphrase three times during encryption.
421 @command{nncp-stat} reports about partly downloaded packets.
424 Updated dependencies.
429 @section Release 6.6.0
433 @command{nncp-daemon}, @command{nncp-call} and @command{nncp-caller}
434 commands wait for all background checksummers completion after
435 connection is finished.
438 Added possibility of address determining through multicast announcement
439 in local area network, so called MCD (MultiCast Discovery).
444 @section Release 6.5.0
448 Fixed segfault in @command{nncp-daemon} when SP handshake did not succeed.
451 Fixed possible bad return code ignoring in automatic tosser.
454 Fixed race during file descriptors closing when online protocol call is
455 finished, that could lead to write error of received packet fragment.
458 Kill all packet transmission progress bars in @command{nncp-daemon},
459 @command{nncp-call} and @command{nncp-caller} when call is finished.
464 @section Release 6.4.0
468 Fixed possible race in online protocol, that lead to panic.
473 @section Release 6.3.0
477 Fixed possible panic while showing progress during online protocol.
482 @section Release 6.2.1
486 Three places in logs contained excess @code{%s}.
491 @section Release 6.2.0
495 Returned @command{nncp-caller}'s @option{-autotoss*} options workability.
498 Yet another logging refactoring and simplification.
499 Should be no visible differences to the end user.
504 @section Release 6.1.0
508 Optimization: most commands do not keep opened file descriptors now.
509 Previously you can exceed maximal number of opened files if you have got
510 many packets in the spool directory.
513 Optimization: do not close file descriptor of the file we download
514 online. Previously each chunk lead to expensive open/close calls.
517 Online downloaded files are saved with @file{.nock} (non-checksummed)
518 suffix, waiting either for @command{nncp-check}, or online daemons to
519 perform integrity check.
522 Optimization: files, that are not resumed, are checksummed immediately
523 during the online download, skipping @file{.nock}-intermediate step.
526 Ability to store encrypted packet's header in @file{.hdr} file, close to
527 the packet itself. That can greatly increase performance of packets
528 listing on filesystems with big block's size.
533 @section Release 6.0.0
537 Log uses human readable and easy machine parseable
538 @url{https://www.gnu.org/software/recutils/, recfile} format for the
539 records, instead of structured RFC 3339 lines. Old logs are not readable
540 by @command{nncp-log} anymore.
543 @option{-autotoss*} option workability with @command{nncp-daemon}'s
544 @option{-inetd} mode.
547 Call's @option{when-tx-exists} allows to make a call only when outbound
548 packets exists. Combined with seconds-aware cron expression that can be
549 used as some kind of auto dialler.
552 @command{nncp-cronexpr} command allows you to check validity and
553 expectations of specified cron expression.
558 @section Release 5.6.0
562 @option{-autotoss*} option runs tosser not after the call, but every
563 second while it is active.
566 @option{autotoss}, @option{autotoss-doseen},
567 @option{autotoss-nofile}, @option{autotoss-nofreq},
568 @option{autotoss-noexec}, @option{autotoss-notrns} options available in
569 @option{calls} configuration section. You can configure per-call
570 automatic tosser options.
573 Use vendoring, instead of @env{$GOPATH} overriding during tarball
574 installation, because current minimal Go's version is 1.12 and it
580 @section Release 5.5.1
584 Respect for @env{$BINDIR}, @env{$INFODIR} and @env{$DOCDIR} environment
585 variables in @file{config} during installation.
590 @section Release 5.5.0
594 Bugfixes in @command{nncp-call(er)}/@command{nncp-daemon},
595 @command{nncp-bundle} and @command{nncp-stat}.
598 @command{nncp-rm} has @option{-dryrun} and @option{-older} options now.
601 @command{nncp-exec} has @option{-use-tmp} and @option{-nocompress}
602 options now. Uncompressed packets are not compatible with previous NNCP
606 @command{nncp-call}, @command{nncp-caller} and @command{nncp-daemon} commands
607 have @option{-autotoss*} options for running tosser after call is ended.
610 Updated dependencies. Minimal required Go version is 1.12.
615 @section Release 5.4.1
619 Fixed @code{SENDMAIL} variable usage during the build.
624 @section Release 5.4.0
628 Updated dependencies.
631 Build system is moved from Makefiles to @url{http://cr.yp.to/redo.html, redo}.
632 This should not influence package maintainers, because minimal @command{redo}
633 implementation is included in tarball.
638 @section Release 5.3.3
642 More various error checks.
645 Updated dependencies.
650 @section Release 5.3.2
654 Fixed incorrect logic of @option{onlinedeadline} timeout, where
655 connection won't take into account incoming packets events and will
656 forcefully disconnect.
661 @section Release 5.3.1
665 Fixed @option{onlinedeadline} workability with call addresses that use
666 external commands (@verb{#"|somecmd"#}).
669 @command{nncp-stat} has @option{-pkt} option displaying information
670 about each packet in the spool.
675 @section Release 5.3.0
679 Progress messages contain prefix, describing the running action.
682 Fixed not occurring handshake messages padding.
685 Finish all SP protocol related goroutines, less memory leak.
688 SP protocol generates less socket write calls, thus generating less TCP
692 Check @option{onlinedeadline} and @option{maxonlinetime} options every
693 second, independently from socket reads (up to 10 seconds).
696 Once per minute, if no other traffic exists, PING packets are sent in
697 SP-connection. That allows faster determining of connection unworkability.
700 @command{nncp-toss} uses lock-file to prevent simultaneous tossing.
705 @section Release 5.2.1
709 Fixed SP protocol error handling, sometimes causing program panic.
714 @section Release 5.2.0
718 Most commands by default show oneline operations progress.
719 @option{-progress}, @option{-noprogress} command line options,
720 @option{noprogress} configuration file option appeared.
723 Fixed incorrect @command{nncp-check} command return code, that returned
724 bad code when everything is good.
727 Free disk space check during @command{nncp-bundle -rx} call.
732 @section Release 5.1.2
736 @strong{Critical} vulnerability: remote peers authentication could lead
737 to incorrect identification of remote side, allowing foreign encrypted
741 Bugfix: private and public Noise keys were swapped in newly created
742 configuration files, that lead to inability to authenticate online peers.
745 Explicit directories @code{fsync}-ing for guaranteed files renaming.
750 @section Release 5.1.1
754 Fixed workability of @command{nncp-file} with @option{-chunked 0} option.
759 @section Release 5.1.0
763 @command{nncp-file} can send directories, automatically creating pax
767 Free disk space is checked during outbound packets creation.
770 @option{freq}, @option{freqminsize}, @option{freqchunked} configuration
771 file options replaced with the structure:
772 @option{freq: @{path: @dots{}, minsize: @dots{}, chunked: @dots{}@}}.
775 Added @option{freq.maxsize} configuration file option, forbidding of
776 freq sending larger than specified size.
779 Ability to notify about successfully executed commands (exec) with
780 @option{notify.exec} configuration file option.
785 @section Release 5.0.0
789 @strong{Incompatible} configuration file format change: YAML is
790 replaced with Hjson, due to its simplicity, without noticeable lack
791 of either functionality or convenience.
794 @strong{Incompatible} plain packet format changes. Older versions are
795 not supported. @code{zlib} compression is replaced with
796 @code{Zstandard}, due to its speed and efficiency, despite library
797 version is not mature enough.
800 Ability to call remote nodes via pipe call of external command, not only
804 @command{nncp-cfgnew} generates configuration file with many
805 comments. @option{-nocomments} option can be used for an old
809 Duplicate filenames have @file{.CTR} suffix, instead of @file{CTR}, to
810 avoid possible collisions with @file{.nncp.chunkCTR}.
813 Ability to override process umask through configuration file option.
816 Files and directories are created with 666/777 permissions by default,
817 allowing control with @command{umask}.
820 Updated dependencies.
823 Full usage of go modules for dependencies management
824 (@code{go.cypherpunks.ru/nncp/v5} namespace is used).
827 Forbid any later GNU GPL version autousage
828 (project's licence now is GNU GPLv3-only).
835 @item Workability on GNU/Linux systems and Go 1.10 is fixed.
843 @strong{Incompatible} encrypted and eblob packet format change: AEAD
844 encryption mode with 128 KiB blocks is used now, because previously
845 @command{nncp-toss} did not verify encrypted packet's MAC before feeding
846 decrypted data to external command. Older versions are not supported.
849 Available free space checking before copying in @command{nncp-xfer},
850 @command{nncp-daemon}, @command{nncp-call(er)}.
853 @command{nncp-call} has ability only to list packets on remote node,
854 without their transmission.
857 @command{nncp-call} has ability to transfer only specified packets.
860 Workability of @option{xxrate} preference in @option{calls}
861 configuration file section.
864 Dependant libraries are updated.
870 Begin using of @code{go.mod} subsystem.
877 @item @command{nncp-daemon} can be run as @command{inetd}-service.
885 @command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller} check
886 if @file{.seen} exists and treat it like file was already downloaded.
887 Possibly it was transferred out-of-bound and remote side needs to be
891 If higher priority packet is spooled, then @command{nncp-daemon} will
892 queue its sending first, interrupting lower priority transmissions.
895 Simple packet rate limiter added to online-related tools
896 (@command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller}).
899 Ability to specify niceness with symbolic notation:
900 @verb{|NORMAL|}, @verb{|BULK+10|}, @verb{|PRIORITY-5|}, etc.
903 Changed default niceness levels:
904 for @command{nncp-exec} from 64 to 96,
905 for @command{nncp-freq} from 64 to 160,
906 for @command{nncp-file} from 196 to 224.
914 @strong{Incompatible} @emph{bundle} archive format changes and
915 @command{nncp-bundle} workability with Go 1.10+. Bundles must be
916 valid tar archives, but Go 1.9 made them invalid because of long paths
917 inside. NNCP accidentally was dependant on that bug. Explicit adding of
918 @file{NNCP/} directory in archive restores workability with valid tar
926 Ability to disable relaying at all using @verb{|-via -|} command line option.
934 @strong{Incompatible} plain packet format changes. Older versions are
938 Ability to queue remote command execution, by configuring @option{exec}
939 option in configuration file and using @command{nncp-exec} command:
942 @command{nncp-mail} command is replaced with more flexible
943 @command{nncp-exec}. Instead of @verb{|nncp-mail NODE RECIPIENT|}
944 you must use @verb{|nncp-exec NODE sendmail RECIPIENT|}.
946 @option{sendmail} configuration file option is replaced with
947 @option{exec}. @code{sendmail: [@dots{}]} must be replaced with
948 @code{exec: sendmail: [@dots{}]}.
952 Ability to override @option{via} configuration option for destination
953 node via @option{-via} command line option for following commands:
954 @command{nncp-file}, @command{nncp-freq}, @command{nncp-exec}.
957 Chunked files, having size less than specified chunk size, will be sent
958 as an ordinary single file.
961 Exec commands are invoked with additional @env{$NNCP_NICE} and
962 @env{$NNCP_SELF} environment variables.
965 Files, that are sent as a reply to freq, have niceness level taken from
966 the freq packet. You can set desired niceness during @command{nncp-freq}
967 invocation using @option{-replynice} option.
970 @command{nncp-toss} command can ignore specified packet types during
971 processing: @option{-nofile}, @option{-nofreq}, @option{-noexec},
975 @command{nncp-file} command uses
976 @option{FreqMinSize}/@option{FreqChunked} configuration file options
977 for @option{-minsize}/@option{-chunked} by default. You can turn this
978 off by specifying zero value.
987 @strong{Incompatible} encrypted/eblob packet format changes. Older
988 versions are not supported.
991 Twofish encryption algorithm is replaced with ChaCha20. It is much more
992 faster. One cryptographic primitive less.
995 HKDF-BLAKE2b-256 KDF algorithm is replaced with BLAKE2Xb XOF. Yet
996 another cryptographic primitive less (assuming that BLAKE2X is nearly
997 identical to BLAKE2).
1002 @section Release 1.0
1006 @strong{Incompatible} encrypted packet format changes. Older versions
1010 @command{nncp-bundle} command can either create stream of encrypted
1011 packets, or digest it. It is useful when dealing with
1012 @code{stdin}/@code{stdout} based transmission methods (like writing to
1013 CD-ROM without intermediate prepared ISO image and working with tape
1017 @command{nncp-toss} is able to create @file{.seen} files preventing
1018 duplicate packets receiving.
1021 Single background checksum verifier worker is allowed in
1022 @command{nncp-call}. This is helpful when thousands of small inbound
1023 packets could create many goroutines.
1026 Ability to override path to spool directory and logfile through either
1027 command line argument, or environment variable.
1030 @command{nncp-rm} is able to delete outbound/inbound, @file{.seen},
1031 @file{.part}, @file{.lock} and temporary files.
1036 @section Release 0.12
1038 @item Sendmail command is called with @env{$NNCP_SENDER} environment variable.
1042 @section Release 0.11
1044 @item @command{nncp-stat}'s command output is sorted by node name.
1048 @section Release 0.10
1051 @command{nncp-freq}'s @file{DST} argument is optional now. Last
1052 @file{SRC} path's element will be used by default.
1056 @section Release 0.9
1059 Fix @option{-rx}/@option{-tx} arguments processing in
1060 @command{nncp-call} command. They were ignored.
1064 @section Release 0.8
1067 Little bugfix in @command{nncp-file} command, where @option{-minsize}
1068 option for unchunked transfer was not in KiBs, but in bytes.
1072 @section Release 0.7
1076 Ability to feed @command{nncp-file} from @code{stdin}, that uses an
1077 encrypted temporary file for that.
1080 Chunked files transmission appeared with corresponding
1081 @command{nncp-reass} command and @option{freqchunked} configuration file
1082 entry. Useful for transferring big files over small storage devices.
1085 @option{freqminsize} configuration file option, analogue to
1086 @option{-minsize} one.
1089 @command{nncp-xfer}'s @option{-force} option is renamed to
1090 @option{-mkdir} for clarity.
1093 @option{-minsize} option is specified in KiBs, not bytes, for
1097 @command{nncp-newcfg} command is renamed to @command{nncp-cfgnew},
1098 and @command{nncp-mincfg} to @command{nncp-cfgmin} -- now they have
1099 common prefix and are grouped together for convenience.
1102 @command{nncp-cfgenc} command appeared, allowing configuration file
1103 encryption/decryption, for keeping it safe without any either OpenPGP or
1104 similar tools usage.
1107 Cryptographic libraries (dependencies) are updated.
1112 @section Release 0.6
1114 @item Small @command{nncp-rm} command appeared.
1115 @item Cryptographic libraries (dependencies) are updated.
1119 @section Release 0.5
1122 Trivial small fix in default niceness level of @command{nncp-file}
1123 and @command{nncp-freq} commands.
1127 @section Release 0.4
1131 Small fix in @command{nncp-call}, @command{nncp-caller},
1132 @command{nncp-daemon}: they can segmentation fail sometimes (no data is
1136 @command{nncp-newnode} renamed to @command{nncp-newcfg} -- it is shorter
1137 and more convenient to use.
1140 @command{nncp-mincfg} command appeared: helper allowing to create
1141 minimalistic stripped down configuration file without private keys, that
1142 is useful during @command{nncp-xfer} usage.
1147 @section Release 0.3
1149 @item Fixed compatibility with Go 1.6.
1153 @section Release 0.2
1157 @strong{Incompatible} packet's format change (magic number is changed
1158 too): size field is encrypted and is not send in plaintext anymore.
1161 @option{-minsize} option gives ability to automatically pad outgoing
1162 packets to specified minimal size.
1165 @command{nncp-daemon} and @command{nncp-call}/@command{nncp-caller}
1166 always check new @emph{tx} packets appearance in the background while
1167 connected. Remote side is immediately notified.
1170 @option{-onlinedeadline} option gives ability to configure timeout of
1171 inactivity of online connection, when it could be disconnected. It could
1172 be used to keep connection alive for a long time.
1175 @option{-maxonlinetime} option gives ability to set maximal allowable
1176 online connection aliveness time.
1179 @command{nncp-caller} command appeared: cron-ed TCP daemon caller.
1182 @command{nncp-pkt} command can decompress the data.