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.
23 @command{nncp-ack} now generates list of ACK packets it created, that
24 could be used as an input to @command{nncp-rm} to remove outbound ACK
30 @section Release 8.6.0
34 @command{nncp-xfer} checks if locally copied packet's checksum differs
35 from the source's one.
38 @command{nncp-call} has bad return code if its queues contain unfinished jobs.
41 @command{nncp-ack} command appeared, that sends explicit packet receipt
42 acknowledgement (ACK packet). That acknowledgement deletes referenced
43 packet from the outbound spool.
46 Ability to turn @code{fsync} operation off using @env{$NNCPNOSYNC=1}
50 Added various indices in documentation, that should help searching in it.
55 @section Release 8.5.0
59 Fixed @command{nncp-bundle} workability.
62 Mistakenly @option{-mcd-wait} option was enabled by default in
66 Ability to override internal default timeout for online protocol through
67 @env{$NNCPDEADLINE} environment variable. Can be useful for very high
71 NNCP builds on OpenBSD.
76 @section Release 8.4.0
80 Multicast related interface names (@code{mcd-listen} and @code{mcd-send}
81 configuration options) are now regular expressions. By default
82 @command{nncp-cfgnew} uncomments them now with @code{.*} interface name.
85 @command{nncp-call} command has @option{-mcd-wait} option to wait for
86 multicast packet about node's address.
89 @command{nncp-file} command skips everything that is neither regular
90 file nor directory during pax-archive creation.
95 @section Release 8.3.0
99 Fixed building issues on 32-bit systems.
104 @section Release 8.2.0
108 Yggdrasil uses pure-Go IPv6+TCP network stack, instead of naked μTP
109 transport protocol, making it able to work as an ordinary TCP server
110 inside overlay network.
113 Yggdrasil's @code{prv;bind1,bind2;pub@dots{}}-like configuration strings are
114 replaced with URL-like ones (@code{yggdrasils://PRV?bind=BIND1&bind=BIND2&pub=PUB}).
117 Ability to pass multicast-related parameters to Yggdrasil configuration.
120 @command{nncp-daemon} is able to listen on both TCP and Yggdrasil-driven
121 sockets simultaneously.
124 @command{nncp-daemon}'s listening on peering endpoint socket is optional
125 -- you can be reached through the peers.
130 @section Release 8.1.0
134 @command{nncp-cfgdir} does not require @code{self} section existence in
138 Ability to act as Yggdrasil network client, using online protocol on top of it.
143 @section Release 8.0.2
147 Fixed sending ability to areas.
152 @section Release 8.0.1
156 Fixed incorrect @code{freq.chunked} value calculation. If it was missed,
157 then chunked transfer mode was forcefully turned on anyway.
160 Fixed incorrect full file's size calculation in @file{.nncp.meta}.
165 @section Release 8.0.0
169 @strong{Incompatible} encrypted packet format change: payload and pad
170 sizes are sent in-bound in the encrypted stream. That gives ability to
171 streamingly create encrypted packets, without knowing sizes in advance,
172 without creating temporary file or buffer data in memory.
175 Proper encrypted packet padding verification is done now. This is not
176 critical issue, but previously neither padding value, nor its size were
177 authenticated, giving ability to iteratively strip trailing bytes and
178 determine payload's size by observing the reaction of the encrypted
182 @command{nncp-exec} loses its @option{-use-tmp} option, because of
183 streaming-compatible encrypted packets format.
186 @command{nncp-file} and @command{nncp-exec} commands have
187 @option{-maxsize} option, limiting maximal resulting encrypted packet's
188 maximal size (returning error if it is exceeded). Could be useful,
189 because no payload size could be known in advance.
194 @section Release 7.7.0
198 Experimental @code{kqueue} and @code{inotify} based notifications
199 support about spool directory changes, for reducing their often reading
203 @file{.seen} and @file{.hdr} files moved to @file{seen/} and @file{hdr/}
204 subdirectories, for faster scanning of spool directories.
205 Current files migration required:
208 $ find $NNCPSPOOL -type f -name "*.hdr" -exec rm @{@} +
210 $ find $NNCPSPOOL -type d -name rx | while read rx ; do
213 find . -type f -name "*.seen" | while read fn ; do
214 mv $fn seen/$@{fn%.seen@}
218 $ find $NNCPSPOOL -type d -name area | while read area ; do
219 find $area -type f -name "*.seen" | while read fn ; do
228 @section Release 7.6.0
232 Logging may be done to specified opened file descriptor
233 (@env{$NNCPLOG=FD:5} for example).
234 That is friendly to use under @command{daemontools}.
237 Added additional checks of public keys existence in configuration file,
238 preventing some commands from failing.
243 @section Release 7.5.1
247 NNCP builds on NetBSD.
252 @section Release 7.5.0
256 @command{nncp-daemon} is compatible with UCSPI-TCP interface, so log
257 will contain remote side's address (when running under appropriate
258 utility). @option{-ucspi} option should be used instead of @option{-inetd}.
261 @command{nncp-call} can be UCSPI-TCP client, using @option{-ucspi} option.
264 Do not exit if some of MCD network interfaces can not be listened --
265 only warn about that.
270 @section Release 7.4.0
274 Fixed simultaneous @command{nncp-daemon} and @command{nncp-caller} MCD work.
279 @section Release 7.3.2
283 @command{hjson-cli} utility builds in vendor-mode now.
288 @section Release 7.3.1
292 Fixed possibly left opened file descriptor in online commands.
295 Severely decreased memory usage of MTH hashing.
300 @section Release 7.3.0
304 Fixed some workability problems on 32-bit systems with big files.
307 Ability to use directory with a bunch of files as a configuration.
308 @command{nncp-cfgdir} command appeared.
313 @section Release 7.2.1
317 Small optimizations in online commands.
322 @section Release 7.2.0
326 @command{nncp-trns} command appeared for manual transition packets creation.
329 If destination node of transitional packet has non empty @option{via}
330 route, then do not ignore, but use it.
333 Do not relay multicast packet to area message's originator, that
334 obviously has seen its own packet.
337 Much less memory usage during MTH hashing when offset is zero: when
338 packet is not resumed, but for example checked with @command{nncp-check}
344 @section Release 7.1.1
348 Fixed failing directories @code{fsync} after @file{.seen} file creation.
353 @section Release 7.1.0
357 Multicasting areas feature appeared. Implemented merely by an additional
358 plain packet type with @command{nncp-toss}, @command{nncp-file} and
359 @command{nncp-exec} commands modification.
362 Fixed workability of @command{nncp-file} and @command{nncp-exec}
363 commands, that use temporary file (@code{stdin} and @option{-use-tmp}).
366 Fixed disappearing bad return code in @command{nncp-exec} command.
369 Fixed invalid @file{.hdr} generation when transitional packets are used.
372 @option{-all} option appeared in @command{nncp-rm} command, applying to
373 all the nodes at once.
376 @option{-cycle} option appeared in @command{nncp-check} command, looping
377 the check in infinite cycle.
380 @command{nncp-rm} command can take node alias name.
383 @command{nncp-pkt} can parse @file{.hdr} files.
388 @section Release 7.0.0
392 Minimal required Go version 1.13.
395 Merkle Tree-based Hashing with BLAKE3 (MTH) is used instead of BLAKE2b.
396 Because of that, there are backward @strong{incompatible} changes of
397 encrypted files (everything laying in the spool directory) and
398 @file{.meta} files of chunked transfer.
400 Current implementation is far from being optimal: it lacks
401 parallelizable calculations and has higher memory consumption: nearly
402 512 KiB for each 1 GiB of file's data. Future performance and memory
403 size optimizations should not lead to packet's format change. But it is
404 still several times faster than BLAKE2b.
407 Resumed online downloads, because of MTH, require reading only of the
408 preceding part of file, not the whole one as was before.
411 @command{nncp-hash} utility appeared for calculating file's MTH hash.
414 BLAKE2 KDF and XOF functions are replaced with BLAKE3 in encrypted
415 packets. Lowering number of used primitives. Also, its encrypted
416 packet's header is used as an associated data during encryption.
419 MultiCast Discovery uses
420 @verb{|ff02::4e4e:4350|} address instead of @verb{|ff02::1|}.
423 @command{nncp-cfgenc} mistakenly asked passphrase three times during encryption.
426 @command{nncp-stat} reports about partly downloaded packets.
429 Updated dependencies.
434 @section Release 6.6.0
438 @command{nncp-daemon}, @command{nncp-call} and @command{nncp-caller}
439 commands wait for all background checksummers completion after
440 connection is finished.
443 Added possibility of address determining through multicast announcement
444 in local area network, so called MCD (MultiCast Discovery).
449 @section Release 6.5.0
453 Fixed segfault in @command{nncp-daemon} when SP handshake did not succeed.
456 Fixed possible bad return code ignoring in automatic tosser.
459 Fixed race during file descriptors closing when online protocol call is
460 finished, that could lead to write error of received packet fragment.
463 Kill all packet transmission progress bars in @command{nncp-daemon},
464 @command{nncp-call} and @command{nncp-caller} when call is finished.
469 @section Release 6.4.0
473 Fixed possible race in online protocol, that lead to panic.
478 @section Release 6.3.0
482 Fixed possible panic while showing progress during online protocol.
487 @section Release 6.2.1
491 Three places in logs contained excess @code{%s}.
496 @section Release 6.2.0
500 Returned @command{nncp-caller}'s @option{-autotoss*} options workability.
503 Yet another logging refactoring and simplification.
504 Should be no visible differences to the end user.
509 @section Release 6.1.0
513 Optimization: most commands do not keep opened file descriptors now.
514 Previously you can exceed maximal number of opened files if you have got
515 many packets in the spool directory.
518 Optimization: do not close file descriptor of the file we download
519 online. Previously each chunk lead to expensive open/close calls.
522 Online downloaded files are saved with @file{.nock} (non-checksummed)
523 suffix, waiting either for @command{nncp-check}, or online daemons to
524 perform integrity check.
527 Optimization: files, that are not resumed, are checksummed immediately
528 during the online download, skipping @file{.nock}-intermediate step.
531 Ability to store encrypted packet's header in @file{.hdr} file, close to
532 the packet itself. That can greatly increase performance of packets
533 listing on filesystems with big block's size.
538 @section Release 6.0.0
542 Log uses human readable and easy machine parseable
543 @url{https://www.gnu.org/software/recutils/, recfile} format for the
544 records, instead of structured RFC 3339 lines. Old logs are not readable
545 by @command{nncp-log} anymore.
548 @option{-autotoss*} option workability with @command{nncp-daemon}'s
549 @option{-inetd} mode.
552 Call's @option{when-tx-exists} allows to make a call only when outbound
553 packets exists. Combined with seconds-aware cron expression that can be
554 used as some kind of auto dialler.
557 @command{nncp-cronexpr} command allows you to check validity and
558 expectations of specified cron expression.
563 @section Release 5.6.0
567 @option{-autotoss*} option runs tosser not after the call, but every
568 second while it is active.
571 @option{autotoss}, @option{autotoss-doseen},
572 @option{autotoss-nofile}, @option{autotoss-nofreq},
573 @option{autotoss-noexec}, @option{autotoss-notrns} options available in
574 @option{calls} configuration section. You can configure per-call
575 automatic tosser options.
578 Use vendoring, instead of @env{$GOPATH} overriding during tarball
579 installation, because current minimal Go's version is 1.12 and it
585 @section Release 5.5.1
589 Respect for @env{$BINDIR}, @env{$INFODIR} and @env{$DOCDIR} environment
590 variables in @file{config} during installation.
595 @section Release 5.5.0
599 Bugfixes in @command{nncp-call(er)}/@command{nncp-daemon},
600 @command{nncp-bundle} and @command{nncp-stat}.
603 @command{nncp-rm} has @option{-dryrun} and @option{-older} options now.
606 @command{nncp-exec} has @option{-use-tmp} and @option{-nocompress}
607 options now. Uncompressed packets are not compatible with previous NNCP
611 @command{nncp-call}, @command{nncp-caller} and @command{nncp-daemon} commands
612 have @option{-autotoss*} options for running tosser after call is ended.
615 Updated dependencies. Minimal required Go version is 1.12.
620 @section Release 5.4.1
624 Fixed @code{SENDMAIL} variable usage during the build.
629 @section Release 5.4.0
633 Updated dependencies.
636 Build system is moved from Makefiles to @url{http://cr.yp.to/redo.html, redo}.
637 This should not influence package maintainers, because minimal @command{redo}
638 implementation is included in tarball.
643 @section Release 5.3.3
647 More various error checks.
650 Updated dependencies.
655 @section Release 5.3.2
659 Fixed incorrect logic of @option{onlinedeadline} timeout, where
660 connection won't take into account incoming packets events and will
661 forcefully disconnect.
666 @section Release 5.3.1
670 Fixed @option{onlinedeadline} workability with call addresses that use
671 external commands (@verb{#"|somecmd"#}).
674 @command{nncp-stat} has @option{-pkt} option displaying information
675 about each packet in the spool.
680 @section Release 5.3.0
684 Progress messages contain prefix, describing the running action.
687 Fixed not occurring handshake messages padding.
690 Finish all SP protocol related goroutines, less memory leak.
693 SP protocol generates less socket write calls, thus generating less TCP
697 Check @option{onlinedeadline} and @option{maxonlinetime} options every
698 second, independently from socket reads (up to 10 seconds).
701 Once per minute, if no other traffic exists, PING packets are sent in
702 SP-connection. That allows faster determining of connection unworkability.
705 @command{nncp-toss} uses lock-file to prevent simultaneous tossing.
710 @section Release 5.2.1
714 Fixed SP protocol error handling, sometimes causing program panic.
719 @section Release 5.2.0
723 Most commands by default show oneline operations progress.
724 @option{-progress}, @option{-noprogress} command line options,
725 @option{noprogress} configuration file option appeared.
728 Fixed incorrect @command{nncp-check} command return code, that returned
729 bad code when everything is good.
732 Free disk space check during @command{nncp-bundle -rx} call.
737 @section Release 5.1.2
741 @strong{Critical} vulnerability: remote peers authentication could lead
742 to incorrect identification of remote side, allowing foreign encrypted
746 Bugfix: private and public Noise keys were swapped in newly created
747 configuration files, that lead to inability to authenticate online peers.
750 Explicit directories @code{fsync}-ing for guaranteed files renaming.
755 @section Release 5.1.1
759 Fixed workability of @command{nncp-file} with @option{-chunked 0} option.
764 @section Release 5.1.0
768 @command{nncp-file} can send directories, automatically creating pax
772 Free disk space is checked during outbound packets creation.
775 @option{freq}, @option{freqminsize}, @option{freqchunked} configuration
776 file options replaced with the structure:
777 @option{freq: @{path: @dots{}, minsize: @dots{}, chunked: @dots{}@}}.
780 Added @option{freq.maxsize} configuration file option, forbidding of
781 freq sending larger than specified size.
784 Ability to notify about successfully executed commands (exec) with
785 @option{notify.exec} configuration file option.
790 @section Release 5.0.0
794 @strong{Incompatible} configuration file format change: YAML is
795 replaced with Hjson, due to its simplicity, without noticeable lack
796 of either functionality or convenience.
799 @strong{Incompatible} plain packet format changes. Older versions are
800 not supported. @code{zlib} compression is replaced with
801 @code{Zstandard}, due to its speed and efficiency, despite library
802 version is not mature enough.
805 Ability to call remote nodes via pipe call of external command, not only
809 @command{nncp-cfgnew} generates configuration file with many
810 comments. @option{-nocomments} option can be used for an old
814 Duplicate filenames have @file{.CTR} suffix, instead of @file{CTR}, to
815 avoid possible collisions with @file{.nncp.chunkCTR}.
818 Ability to override process umask through configuration file option.
821 Files and directories are created with 666/777 permissions by default,
822 allowing control with @command{umask}.
825 Updated dependencies.
828 Full usage of go modules for dependencies management
829 (@code{go.cypherpunks.ru/nncp/v5} namespace is used).
832 Forbid any later GNU GPL version autousage
833 (project's licence now is GNU GPLv3-only).
840 @item Workability on GNU/Linux systems and Go 1.10 is fixed.
848 @strong{Incompatible} encrypted and eblob packet format change: AEAD
849 encryption mode with 128 KiB blocks is used now, because previously
850 @command{nncp-toss} did not verify encrypted packet's MAC before feeding
851 decrypted data to external command. Older versions are not supported.
854 Available free space checking before copying in @command{nncp-xfer},
855 @command{nncp-daemon}, @command{nncp-call(er)}.
858 @command{nncp-call} has ability only to list packets on remote node,
859 without their transmission.
862 @command{nncp-call} has ability to transfer only specified packets.
865 Workability of @option{xxrate} preference in @option{calls}
866 configuration file section.
869 Dependant libraries are updated.
875 Begin using of @code{go.mod} subsystem.
882 @item @command{nncp-daemon} can be run as @command{inetd}-service.
890 @command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller} check
891 if @file{.seen} exists and treat it like file was already downloaded.
892 Possibly it was transferred out-of-bound and remote side needs to be
896 If higher priority packet is spooled, then @command{nncp-daemon} will
897 queue its sending first, interrupting lower priority transmissions.
900 Simple packet rate limiter added to online-related tools
901 (@command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller}).
904 Ability to specify niceness with symbolic notation:
905 @verb{|NORMAL|}, @verb{|BULK+10|}, @verb{|PRIORITY-5|}, etc.
908 Changed default niceness levels:
909 for @command{nncp-exec} from 64 to 96,
910 for @command{nncp-freq} from 64 to 160,
911 for @command{nncp-file} from 196 to 224.
919 @strong{Incompatible} @emph{bundle} archive format changes and
920 @command{nncp-bundle} workability with Go 1.10+. Bundles must be
921 valid tar archives, but Go 1.9 made them invalid because of long paths
922 inside. NNCP accidentally was dependant on that bug. Explicit adding of
923 @file{NNCP/} directory in archive restores workability with valid tar
931 Ability to disable relaying at all using @verb{|-via -|} command line option.
939 @strong{Incompatible} plain packet format changes. Older versions are
943 Ability to queue remote command execution, by configuring @option{exec}
944 option in configuration file and using @command{nncp-exec} command:
947 @command{nncp-mail} command is replaced with more flexible
948 @command{nncp-exec}. Instead of @verb{|nncp-mail NODE RECIPIENT|}
949 you must use @verb{|nncp-exec NODE sendmail RECIPIENT|}.
951 @option{sendmail} configuration file option is replaced with
952 @option{exec}. @code{sendmail: [@dots{}]} must be replaced with
953 @code{exec: sendmail: [@dots{}]}.
957 Ability to override @option{via} configuration option for destination
958 node via @option{-via} command line option for following commands:
959 @command{nncp-file}, @command{nncp-freq}, @command{nncp-exec}.
962 Chunked files, having size less than specified chunk size, will be sent
963 as an ordinary single file.
966 Exec commands are invoked with additional @env{$NNCP_NICE} and
967 @env{$NNCP_SELF} environment variables.
970 Files, that are sent as a reply to freq, have niceness level taken from
971 the freq packet. You can set desired niceness during @command{nncp-freq}
972 invocation using @option{-replynice} option.
975 @command{nncp-toss} command can ignore specified packet types during
976 processing: @option{-nofile}, @option{-nofreq}, @option{-noexec},
980 @command{nncp-file} command uses
981 @option{FreqMinSize}/@option{FreqChunked} configuration file options
982 for @option{-minsize}/@option{-chunked} by default. You can turn this
983 off by specifying zero value.
992 @strong{Incompatible} encrypted/eblob packet format changes. Older
993 versions are not supported.
996 Twofish encryption algorithm is replaced with ChaCha20. It is much more
997 faster. One cryptographic primitive less.
1000 HKDF-BLAKE2b-256 KDF algorithm is replaced with BLAKE2Xb XOF. Yet
1001 another cryptographic primitive less (assuming that BLAKE2X is nearly
1002 identical to BLAKE2).
1007 @section Release 1.0
1011 @strong{Incompatible} encrypted packet format changes. Older versions
1015 @command{nncp-bundle} command can either create stream of encrypted
1016 packets, or digest it. It is useful when dealing with
1017 @code{stdin}/@code{stdout} based transmission methods (like writing to
1018 CD-ROM without intermediate prepared ISO image and working with tape
1022 @command{nncp-toss} is able to create @file{.seen} files preventing
1023 duplicate packets receiving.
1026 Single background checksum verifier worker is allowed in
1027 @command{nncp-call}. This is helpful when thousands of small inbound
1028 packets could create many goroutines.
1031 Ability to override path to spool directory and logfile through either
1032 command line argument, or environment variable.
1035 @command{nncp-rm} is able to delete outbound/inbound, @file{.seen},
1036 @file{.part}, @file{.lock} and temporary files.
1041 @section Release 0.12
1043 @item Sendmail command is called with @env{$NNCP_SENDER} environment variable.
1047 @section Release 0.11
1049 @item @command{nncp-stat}'s command output is sorted by node name.
1053 @section Release 0.10
1056 @command{nncp-freq}'s @file{DST} argument is optional now. Last
1057 @file{SRC} path's element will be used by default.
1061 @section Release 0.9
1064 Fix @option{-rx}/@option{-tx} arguments processing in
1065 @command{nncp-call} command. They were ignored.
1069 @section Release 0.8
1072 Little bugfix in @command{nncp-file} command, where @option{-minsize}
1073 option for unchunked transfer was not in KiBs, but in bytes.
1077 @section Release 0.7
1081 Ability to feed @command{nncp-file} from @code{stdin}, that uses an
1082 encrypted temporary file for that.
1085 Chunked files transmission appeared with corresponding
1086 @command{nncp-reass} command and @option{freqchunked} configuration file
1087 entry. Useful for transferring big files over small storage devices.
1090 @option{freqminsize} configuration file option, analogue to
1091 @option{-minsize} one.
1094 @command{nncp-xfer}'s @option{-force} option is renamed to
1095 @option{-mkdir} for clarity.
1098 @option{-minsize} option is specified in KiBs, not bytes, for
1102 @command{nncp-newcfg} command is renamed to @command{nncp-cfgnew},
1103 and @command{nncp-mincfg} to @command{nncp-cfgmin} -- now they have
1104 common prefix and are grouped together for convenience.
1107 @command{nncp-cfgenc} command appeared, allowing configuration file
1108 encryption/decryption, for keeping it safe without any either OpenPGP or
1109 similar tools usage.
1112 Cryptographic libraries (dependencies) are updated.
1117 @section Release 0.6
1119 @item Small @command{nncp-rm} command appeared.
1120 @item Cryptographic libraries (dependencies) are updated.
1124 @section Release 0.5
1127 Trivial small fix in default niceness level of @command{nncp-file}
1128 and @command{nncp-freq} commands.
1132 @section Release 0.4
1136 Small fix in @command{nncp-call}, @command{nncp-caller},
1137 @command{nncp-daemon}: they can segmentation fail sometimes (no data is
1141 @command{nncp-newnode} renamed to @command{nncp-newcfg} -- it is shorter
1142 and more convenient to use.
1145 @command{nncp-mincfg} command appeared: helper allowing to create
1146 minimalistic stripped down configuration file without private keys, that
1147 is useful during @command{nncp-xfer} usage.
1152 @section Release 0.3
1154 @item Fixed compatibility with Go 1.6.
1158 @section Release 0.2
1162 @strong{Incompatible} packet's format change (magic number is changed
1163 too): size field is encrypted and is not send in plaintext anymore.
1166 @option{-minsize} option gives ability to automatically pad outgoing
1167 packets to specified minimal size.
1170 @command{nncp-daemon} and @command{nncp-call}/@command{nncp-caller}
1171 always check new @emph{tx} packets appearance in the background while
1172 connected. Remote side is immediately notified.
1175 @option{-onlinedeadline} option gives ability to configure timeout of
1176 inactivity of online connection, when it could be disconnected. It could
1177 be used to keep connection alive for a long time.
1180 @option{-maxonlinetime} option gives ability to set maximal allowable
1181 online connection aliveness time.
1184 @command{nncp-caller} command appeared: cron-ed TCP daemon caller.
1187 @command{nncp-pkt} command can decompress the data.