5 See also this page @ref{Новости, on russian}.
12 Fixed @command{nncp-daemon} failing with unauthenticated connection and
13 enabled @option{-autotoss}.
21 @section Release 8.8.0
25 Fixed buildability under Go 1.19.
28 Minimal required Go version is 1.17.
36 @section Release 8.7.2
40 More intuitive, clear and slightly more flexible behaviour of @command{nncp-rm}.
43 @command{nncp-rm} also removes corresponding @file{hdr/} file for each
49 @section Release 8.7.1
53 @command{nncp-xfer} now correctly checks for @file{seen/} files for
59 @section Release 8.7.0
63 @command{nncp-ack} does not acknowledge ACK-packets, preventing an
67 @command{nncp-ack} previously did not remove corresponding @file{hdr/} files.
70 @command{nncp-rm} now takes list of packet from @code{stdin} when
71 @option{-pkt} option is used.
74 @command{nncp-ack} now generates list of ACK packets it created, that
75 could be used as an input to @command{nncp-rm} to remove outbound ACK
81 @section Release 8.6.0
85 @command{nncp-xfer} checks if locally copied packet's checksum differs
86 from the source's one.
89 @command{nncp-call} has bad return code if its queues contain unfinished jobs.
92 @command{nncp-ack} command appeared, that sends explicit packet receipt
93 acknowledgement (ACK packet). That acknowledgement deletes referenced
94 packet from the outbound spool.
97 Ability to turn @code{fsync} operation off using @env{$NNCPNOSYNC=1}
101 Added various indices in documentation, that should help searching in it.
106 @section Release 8.5.0
110 Fixed @command{nncp-bundle} workability.
113 Mistakenly @option{-mcd-wait} option was enabled by default in
117 Ability to override internal default timeout for online protocol through
118 @env{$NNCPDEADLINE} environment variable. Can be useful for very high
122 NNCP builds on OpenBSD.
127 @section Release 8.4.0
131 Multicast related interface names (@code{mcd-listen} and @code{mcd-send}
132 configuration options) are now regular expressions. By default
133 @command{nncp-cfgnew} uncomments them now with @code{.*} interface name.
136 @command{nncp-call} command has @option{-mcd-wait} option to wait for
137 multicast packet about node's address.
140 @command{nncp-file} command skips everything that is neither regular
141 file nor directory during pax-archive creation.
146 @section Release 8.3.0
150 Fixed building issues on 32-bit systems.
155 @section Release 8.2.0
159 Yggdrasil uses pure-Go IPv6+TCP network stack, instead of naked μTP
160 transport protocol, making it able to work as an ordinary TCP server
161 inside overlay network.
164 Yggdrasil's @code{prv;bind1,bind2;pub@dots{}}-like configuration strings are
165 replaced with URL-like ones (@code{yggdrasils://PRV?bind=BIND1&bind=BIND2&pub=PUB}).
168 Ability to pass multicast-related parameters to Yggdrasil configuration.
171 @command{nncp-daemon} is able to listen on both TCP and Yggdrasil-driven
172 sockets simultaneously.
175 @command{nncp-daemon}'s listening on peering endpoint socket is optional
176 -- you can be reached through the peers.
181 @section Release 8.1.0
185 @command{nncp-cfgdir} does not require @code{self} section existence in
189 Ability to act as Yggdrasil network client, using online protocol on top of it.
194 @section Release 8.0.2
198 Fixed sending ability to areas.
203 @section Release 8.0.1
207 Fixed incorrect @code{freq.chunked} value calculation. If it was missed,
208 then chunked transfer mode was forcefully turned on anyway.
211 Fixed incorrect full file's size calculation in @file{.nncp.meta}.
216 @section Release 8.0.0
220 @strong{Incompatible} encrypted packet format change: payload and pad
221 sizes are sent in-bound in the encrypted stream. That gives ability to
222 streamingly create encrypted packets, without knowing sizes in advance,
223 without creating temporary file or buffer data in memory.
226 Proper encrypted packet padding verification is done now. This is not
227 critical issue, but previously neither padding value, nor its size were
228 authenticated, giving ability to iteratively strip trailing bytes and
229 determine payload's size by observing the reaction of the encrypted
233 @command{nncp-exec} loses its @option{-use-tmp} option, because of
234 streaming-compatible encrypted packets format.
237 @command{nncp-file} and @command{nncp-exec} commands have
238 @option{-maxsize} option, limiting maximal resulting encrypted packet's
239 maximal size (returning error if it is exceeded). Could be useful,
240 because no payload size could be known in advance.
245 @section Release 7.7.0
249 Experimental @code{kqueue} and @code{inotify} based notifications
250 support about spool directory changes, for reducing their often reading
254 @file{.seen} and @file{.hdr} files moved to @file{seen/} and @file{hdr/}
255 subdirectories, for faster scanning of spool directories.
256 Current files migration required:
259 $ find $NNCPSPOOL -type f -name "*.hdr" -exec rm @{@} +
261 $ find $NNCPSPOOL -type d -name rx | while read rx ; do
264 find . -type f -name "*.seen" | while read fn ; do
265 mv $fn seen/$@{fn%.seen@}
269 $ find $NNCPSPOOL -type d -name area | while read area ; do
270 find $area -type f -name "*.seen" | while read fn ; do
279 @section Release 7.6.0
283 Logging may be done to specified opened file descriptor
284 (@env{$NNCPLOG=FD:5} for example).
285 That is friendly to use under @command{daemontools}.
288 Added additional checks of public keys existence in configuration file,
289 preventing some commands from failing.
294 @section Release 7.5.1
298 NNCP builds on NetBSD.
303 @section Release 7.5.0
307 @command{nncp-daemon} is compatible with UCSPI-TCP interface, so log
308 will contain remote side's address (when running under appropriate
309 utility). @option{-ucspi} option should be used instead of @option{-inetd}.
312 @command{nncp-call} can be UCSPI-TCP client, using @option{-ucspi} option.
315 Do not exit if some of MCD network interfaces can not be listened --
316 only warn about that.
321 @section Release 7.4.0
325 Fixed simultaneous @command{nncp-daemon} and @command{nncp-caller} MCD work.
330 @section Release 7.3.2
334 @command{hjson-cli} utility builds in vendor-mode now.
339 @section Release 7.3.1
343 Fixed possibly left opened file descriptor in online commands.
346 Severely decreased memory usage of MTH hashing.
351 @section Release 7.3.0
355 Fixed some workability problems on 32-bit systems with big files.
358 Ability to use directory with a bunch of files as a configuration.
359 @command{nncp-cfgdir} command appeared.
364 @section Release 7.2.1
368 Small optimizations in online commands.
373 @section Release 7.2.0
377 @command{nncp-trns} command appeared for manual transition packets creation.
380 If destination node of transitional packet has non empty @option{via}
381 route, then do not ignore, but use it.
384 Do not relay multicast packet to area message's originator, that
385 obviously has seen its own packet.
388 Much less memory usage during MTH hashing when offset is zero: when
389 packet is not resumed, but for example checked with @command{nncp-check}
395 @section Release 7.1.1
399 Fixed failing directories @code{fsync} after @file{.seen} file creation.
404 @section Release 7.1.0
408 Multicasting areas feature appeared. Implemented merely by an additional
409 plain packet type with @command{nncp-toss}, @command{nncp-file} and
410 @command{nncp-exec} commands modification.
413 Fixed workability of @command{nncp-file} and @command{nncp-exec}
414 commands, that use temporary file (@code{stdin} and @option{-use-tmp}).
417 Fixed disappearing bad return code in @command{nncp-exec} command.
420 Fixed invalid @file{.hdr} generation when transitional packets are used.
423 @option{-all} option appeared in @command{nncp-rm} command, applying to
424 all the nodes at once.
427 @option{-cycle} option appeared in @command{nncp-check} command, looping
428 the check in infinite cycle.
431 @command{nncp-rm} command can take node alias name.
434 @command{nncp-pkt} can parse @file{.hdr} files.
439 @section Release 7.0.0
443 Minimal required Go version is 1.13.
446 Merkle Tree-based Hashing with BLAKE3 (MTH) is used instead of BLAKE2b.
447 Because of that, there are backward @strong{incompatible} changes of
448 encrypted files (everything laying in the spool directory) and
449 @file{.meta} files of chunked transfer.
451 Current implementation is far from being optimal: it lacks
452 parallelizable calculations and has higher memory consumption: nearly
453 512 KiB for each 1 GiB of file's data. Future performance and memory
454 size optimizations should not lead to packet's format change. But it is
455 still several times faster than BLAKE2b.
458 Resumed online downloads, because of MTH, require reading only of the
459 preceding part of file, not the whole one as was before.
462 @command{nncp-hash} utility appeared for calculating file's MTH hash.
465 BLAKE2 KDF and XOF functions are replaced with BLAKE3 in encrypted
466 packets. Lowering number of used primitives. Also, its encrypted
467 packet's header is used as an associated data during encryption.
470 MultiCast Discovery uses
471 @verb{|ff02::4e4e:4350|} address instead of @verb{|ff02::1|}.
474 @command{nncp-cfgenc} mistakenly asked passphrase three times during encryption.
477 @command{nncp-stat} reports about partly downloaded packets.
480 Updated dependencies.
485 @section Release 6.6.0
489 @command{nncp-daemon}, @command{nncp-call} and @command{nncp-caller}
490 commands wait for all background checksummers completion after
491 connection is finished.
494 Added possibility of address determining through multicast announcement
495 in local area network, so called MCD (MultiCast Discovery).
500 @section Release 6.5.0
504 Fixed segfault in @command{nncp-daemon} when SP handshake did not succeed.
507 Fixed possible bad return code ignoring in automatic tosser.
510 Fixed race during file descriptors closing when online protocol call is
511 finished, that could lead to write error of received packet fragment.
514 Kill all packet transmission progress bars in @command{nncp-daemon},
515 @command{nncp-call} and @command{nncp-caller} when call is finished.
520 @section Release 6.4.0
524 Fixed possible race in online protocol, that lead to panic.
529 @section Release 6.3.0
533 Fixed possible panic while showing progress during online protocol.
538 @section Release 6.2.1
542 Three places in logs contained excess @code{%s}.
547 @section Release 6.2.0
551 Returned @command{nncp-caller}'s @option{-autotoss*} options workability.
554 Yet another logging refactoring and simplification.
555 Should be no visible differences to the end user.
560 @section Release 6.1.0
564 Optimization: most commands do not keep opened file descriptors now.
565 Previously you can exceed maximal number of opened files if you have got
566 many packets in the spool directory.
569 Optimization: do not close file descriptor of the file we download
570 online. Previously each chunk lead to expensive open/close calls.
573 Online downloaded files are saved with @file{.nock} (non-checksummed)
574 suffix, waiting either for @command{nncp-check}, or online daemons to
575 perform integrity check.
578 Optimization: files, that are not resumed, are checksummed immediately
579 during the online download, skipping @file{.nock}-intermediate step.
582 Ability to store encrypted packet's header in @file{.hdr} file, close to
583 the packet itself. That can greatly increase performance of packets
584 listing on filesystems with big block's size.
589 @section Release 6.0.0
593 Log uses human readable and easy machine parseable
594 @url{https://www.gnu.org/software/recutils/, recfile} format for the
595 records, instead of structured RFC 3339 lines. Old logs are not readable
596 by @command{nncp-log} anymore.
599 @option{-autotoss*} option workability with @command{nncp-daemon}'s
600 @option{-inetd} mode.
603 Call's @option{when-tx-exists} allows to make a call only when outbound
604 packets exists. Combined with seconds-aware cron expression that can be
605 used as some kind of auto dialler.
608 @command{nncp-cronexpr} command allows you to check validity and
609 expectations of specified cron expression.
614 @section Release 5.6.0
618 @option{-autotoss*} option runs tosser not after the call, but every
619 second while it is active.
622 @option{autotoss}, @option{autotoss-doseen},
623 @option{autotoss-nofile}, @option{autotoss-nofreq},
624 @option{autotoss-noexec}, @option{autotoss-notrns} options available in
625 @option{calls} configuration section. You can configure per-call
626 automatic tosser options.
629 Use vendoring, instead of @env{$GOPATH} overriding during tarball
630 installation, because current minimal Go's version is 1.12 and it
636 @section Release 5.5.1
640 Respect for @env{$BINDIR}, @env{$INFODIR} and @env{$DOCDIR} environment
641 variables in @file{config} during installation.
646 @section Release 5.5.0
650 Bugfixes in @command{nncp-call(er)}/@command{nncp-daemon},
651 @command{nncp-bundle} and @command{nncp-stat}.
654 @command{nncp-rm} has @option{-dryrun} and @option{-older} options now.
657 @command{nncp-exec} has @option{-use-tmp} and @option{-nocompress}
658 options now. Uncompressed packets are not compatible with previous NNCP
662 @command{nncp-call}, @command{nncp-caller} and @command{nncp-daemon} commands
663 have @option{-autotoss*} options for running tosser after call is ended.
666 Updated dependencies. Minimal required Go version is 1.12.
671 @section Release 5.4.1
675 Fixed @code{SENDMAIL} variable usage during the build.
680 @section Release 5.4.0
684 Updated dependencies.
687 Build system is moved from Makefiles to @url{http://cr.yp.to/redo.html, redo}.
688 This should not influence package maintainers, because minimal @command{redo}
689 implementation is included in tarball.
694 @section Release 5.3.3
698 More various error checks.
701 Updated dependencies.
706 @section Release 5.3.2
710 Fixed incorrect logic of @option{onlinedeadline} timeout, where
711 connection won't take into account incoming packets events and will
712 forcefully disconnect.
717 @section Release 5.3.1
721 Fixed @option{onlinedeadline} workability with call addresses that use
722 external commands (@verb{#"|somecmd"#}).
725 @command{nncp-stat} has @option{-pkt} option displaying information
726 about each packet in the spool.
731 @section Release 5.3.0
735 Progress messages contain prefix, describing the running action.
738 Fixed not occurring handshake messages padding.
741 Finish all SP protocol related goroutines, less memory leak.
744 SP protocol generates less socket write calls, thus generating less TCP
748 Check @option{onlinedeadline} and @option{maxonlinetime} options every
749 second, independently from socket reads (up to 10 seconds).
752 Once per minute, if no other traffic exists, PING packets are sent in
753 SP-connection. That allows faster determining of connection unworkability.
756 @command{nncp-toss} uses lock-file to prevent simultaneous tossing.
761 @section Release 5.2.1
765 Fixed SP protocol error handling, sometimes causing program panic.
770 @section Release 5.2.0
774 Most commands by default show oneline operations progress.
775 @option{-progress}, @option{-noprogress} command line options,
776 @option{noprogress} configuration file option appeared.
779 Fixed incorrect @command{nncp-check} command return code, that returned
780 bad code when everything is good.
783 Free disk space check during @command{nncp-bundle -rx} call.
788 @section Release 5.1.2
792 @strong{Critical} vulnerability: remote peers authentication could lead
793 to incorrect identification of remote side, allowing foreign encrypted
797 Bugfix: private and public Noise keys were swapped in newly created
798 configuration files, that lead to inability to authenticate online peers.
801 Explicit directories @code{fsync}-ing for guaranteed files renaming.
806 @section Release 5.1.1
810 Fixed workability of @command{nncp-file} with @option{-chunked 0} option.
815 @section Release 5.1.0
819 @command{nncp-file} can send directories, automatically creating pax
823 Free disk space is checked during outbound packets creation.
826 @option{freq}, @option{freqminsize}, @option{freqchunked} configuration
827 file options replaced with the structure:
828 @option{freq: @{path: @dots{}, minsize: @dots{}, chunked: @dots{}@}}.
831 Added @option{freq.maxsize} configuration file option, forbidding of
832 freq sending larger than specified size.
835 Ability to notify about successfully executed commands (exec) with
836 @option{notify.exec} configuration file option.
841 @section Release 5.0.0
845 @strong{Incompatible} configuration file format change: YAML is
846 replaced with Hjson, due to its simplicity, without noticeable lack
847 of either functionality or convenience.
850 @strong{Incompatible} plain packet format changes. Older versions are
851 not supported. @code{zlib} compression is replaced with
852 @code{Zstandard}, due to its speed and efficiency, despite library
853 version is not mature enough.
856 Ability to call remote nodes via pipe call of external command, not only
860 @command{nncp-cfgnew} generates configuration file with many
861 comments. @option{-nocomments} option can be used for an old
865 Duplicate filenames have @file{.CTR} suffix, instead of @file{CTR}, to
866 avoid possible collisions with @file{.nncp.chunkCTR}.
869 Ability to override process umask through configuration file option.
872 Files and directories are created with 666/777 permissions by default,
873 allowing control with @command{umask}.
876 Updated dependencies.
879 Full usage of go modules for dependencies management
880 (@code{go.cypherpunks.ru/nncp/v5} namespace is used).
883 Forbid any later GNU GPL version autousage
884 (project's licence now is GNU GPLv3-only).
891 @item Workability on GNU/Linux systems and Go 1.10 is fixed.
899 @strong{Incompatible} encrypted and eblob packet format change: AEAD
900 encryption mode with 128 KiB blocks is used now, because previously
901 @command{nncp-toss} did not verify encrypted packet's MAC before feeding
902 decrypted data to external command. Older versions are not supported.
905 Available free space checking before copying in @command{nncp-xfer},
906 @command{nncp-daemon}, @command{nncp-call(er)}.
909 @command{nncp-call} has ability only to list packets on remote node,
910 without their transmission.
913 @command{nncp-call} has ability to transfer only specified packets.
916 Workability of @option{xxrate} preference in @option{calls}
917 configuration file section.
920 Dependant libraries are updated.
926 Begin using of @code{go.mod} subsystem.
933 @item @command{nncp-daemon} can be run as @command{inetd}-service.
941 @command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller} check
942 if @file{.seen} exists and treat it like file was already downloaded.
943 Possibly it was transferred out-of-bound and remote side needs to be
947 If higher priority packet is spooled, then @command{nncp-daemon} will
948 queue its sending first, interrupting lower priority transmissions.
951 Simple packet rate limiter added to online-related tools
952 (@command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller}).
955 Ability to specify niceness with symbolic notation:
956 @verb{|NORMAL|}, @verb{|BULK+10|}, @verb{|PRIORITY-5|}, etc.
959 Changed default niceness levels:
960 for @command{nncp-exec} from 64 to 96,
961 for @command{nncp-freq} from 64 to 160,
962 for @command{nncp-file} from 196 to 224.
970 @strong{Incompatible} @emph{bundle} archive format changes and
971 @command{nncp-bundle} workability with Go 1.10+. Bundles must be
972 valid tar archives, but Go 1.9 made them invalid because of long paths
973 inside. NNCP accidentally was dependant on that bug. Explicit adding of
974 @file{NNCP/} directory in archive restores workability with valid tar
982 Ability to disable relaying at all using @verb{|-via -|} command line option.
990 @strong{Incompatible} plain packet format changes. Older versions are
994 Ability to queue remote command execution, by configuring @option{exec}
995 option in configuration file and using @command{nncp-exec} command:
998 @command{nncp-mail} command is replaced with more flexible
999 @command{nncp-exec}. Instead of @verb{|nncp-mail NODE RECIPIENT|}
1000 you must use @verb{|nncp-exec NODE sendmail RECIPIENT|}.
1002 @option{sendmail} configuration file option is replaced with
1003 @option{exec}. @code{sendmail: [@dots{}]} must be replaced with
1004 @code{exec: sendmail: [@dots{}]}.
1008 Ability to override @option{via} configuration option for destination
1009 node via @option{-via} command line option for following commands:
1010 @command{nncp-file}, @command{nncp-freq}, @command{nncp-exec}.
1013 Chunked files, having size less than specified chunk size, will be sent
1014 as an ordinary single file.
1017 Exec commands are invoked with additional @env{$NNCP_NICE} and
1018 @env{$NNCP_SELF} environment variables.
1021 Files, that are sent as a reply to freq, have niceness level taken from
1022 the freq packet. You can set desired niceness during @command{nncp-freq}
1023 invocation using @option{-replynice} option.
1026 @command{nncp-toss} command can ignore specified packet types during
1027 processing: @option{-nofile}, @option{-nofreq}, @option{-noexec},
1031 @command{nncp-file} command uses
1032 @option{FreqMinSize}/@option{FreqChunked} configuration file options
1033 for @option{-minsize}/@option{-chunked} by default. You can turn this
1034 off by specifying zero value.
1039 @section Release 2.0
1043 @strong{Incompatible} encrypted/eblob packet format changes. Older
1044 versions are not supported.
1047 Twofish encryption algorithm is replaced with ChaCha20. It is much more
1048 faster. One cryptographic primitive less.
1051 HKDF-BLAKE2b-256 KDF algorithm is replaced with BLAKE2Xb XOF. Yet
1052 another cryptographic primitive less (assuming that BLAKE2X is nearly
1053 identical to BLAKE2).
1058 @section Release 1.0
1062 @strong{Incompatible} encrypted packet format changes. Older versions
1066 @command{nncp-bundle} command can either create stream of encrypted
1067 packets, or digest it. It is useful when dealing with
1068 @code{stdin}/@code{stdout} based transmission methods (like writing to
1069 CD-ROM without intermediate prepared ISO image and working with tape
1073 @command{nncp-toss} is able to create @file{.seen} files preventing
1074 duplicate packets receiving.
1077 Single background checksum verifier worker is allowed in
1078 @command{nncp-call}. This is helpful when thousands of small inbound
1079 packets could create many goroutines.
1082 Ability to override path to spool directory and logfile through either
1083 command line argument, or environment variable.
1086 @command{nncp-rm} is able to delete outbound/inbound, @file{.seen},
1087 @file{.part}, @file{.lock} and temporary files.
1092 @section Release 0.12
1094 @item Sendmail command is called with @env{$NNCP_SENDER} environment variable.
1098 @section Release 0.11
1100 @item @command{nncp-stat}'s command output is sorted by node name.
1104 @section Release 0.10
1107 @command{nncp-freq}'s @file{DST} argument is optional now. Last
1108 @file{SRC} path's element will be used by default.
1112 @section Release 0.9
1115 Fix @option{-rx}/@option{-tx} arguments processing in
1116 @command{nncp-call} command. They were ignored.
1120 @section Release 0.8
1123 Little bugfix in @command{nncp-file} command, where @option{-minsize}
1124 option for unchunked transfer was not in KiBs, but in bytes.
1128 @section Release 0.7
1132 Ability to feed @command{nncp-file} from @code{stdin}, that uses an
1133 encrypted temporary file for that.
1136 Chunked files transmission appeared with corresponding
1137 @command{nncp-reass} command and @option{freqchunked} configuration file
1138 entry. Useful for transferring big files over small storage devices.
1141 @option{freqminsize} configuration file option, analogue to
1142 @option{-minsize} one.
1145 @command{nncp-xfer}'s @option{-force} option is renamed to
1146 @option{-mkdir} for clarity.
1149 @option{-minsize} option is specified in KiBs, not bytes, for
1153 @command{nncp-newcfg} command is renamed to @command{nncp-cfgnew},
1154 and @command{nncp-mincfg} to @command{nncp-cfgmin} -- now they have
1155 common prefix and are grouped together for convenience.
1158 @command{nncp-cfgenc} command appeared, allowing configuration file
1159 encryption/decryption, for keeping it safe without any either OpenPGP or
1160 similar tools usage.
1163 Cryptographic libraries (dependencies) are updated.
1168 @section Release 0.6
1170 @item Small @command{nncp-rm} command appeared.
1171 @item Cryptographic libraries (dependencies) are updated.
1175 @section Release 0.5
1178 Trivial small fix in default niceness level of @command{nncp-file}
1179 and @command{nncp-freq} commands.
1183 @section Release 0.4
1187 Small fix in @command{nncp-call}, @command{nncp-caller},
1188 @command{nncp-daemon}: they can segmentation fail sometimes (no data is
1192 @command{nncp-newnode} renamed to @command{nncp-newcfg} -- it is shorter
1193 and more convenient to use.
1196 @command{nncp-mincfg} command appeared: helper allowing to create
1197 minimalistic stripped down configuration file without private keys, that
1198 is useful during @command{nncp-xfer} usage.
1203 @section Release 0.3
1205 @item Fixed compatibility with Go 1.6.
1209 @section Release 0.2
1213 @strong{Incompatible} packet's format change (magic number is changed
1214 too): size field is encrypted and is not send in plaintext anymore.
1217 @option{-minsize} option gives ability to automatically pad outgoing
1218 packets to specified minimal size.
1221 @command{nncp-daemon} and @command{nncp-call}/@command{nncp-caller}
1222 always check new @emph{tx} packets appearance in the background while
1223 connected. Remote side is immediately notified.
1226 @option{-onlinedeadline} option gives ability to configure timeout of
1227 inactivity of online connection, when it could be disconnected. It could
1228 be used to keep connection alive for a long time.
1231 @option{-maxonlinetime} option gives ability to set maximal allowable
1232 online connection aliveness time.
1235 @command{nncp-caller} command appeared: cron-ed TCP daemon caller.
1238 @command{nncp-pkt} command can decompress the data.