5 See also this page @ref{Новости, on russian}.
12 Fixed buildability under Go 1.19.
15 Minimal required Go version is 1.17.
20 @section Release 8.7.2
24 More intuitive, clear and slightly more flexible behaviour of @command{nncp-rm}.
27 @command{nncp-rm} also removes corresponding @file{hdr/} file for each
33 @section Release 8.7.1
37 @command{nncp-xfer} now correctly checks for @file{seen/} files for
43 @section Release 8.7.0
47 @command{nncp-ack} does not acknowledge ACK-packets, preventing an
51 @command{nncp-ack} previously did not remove corresponding @file{hdr/} files.
54 @command{nncp-rm} now takes list of packet from @code{stdin} when
55 @option{-pkt} option is used.
58 @command{nncp-ack} now generates list of ACK packets it created, that
59 could be used as an input to @command{nncp-rm} to remove outbound ACK
65 @section Release 8.6.0
69 @command{nncp-xfer} checks if locally copied packet's checksum differs
70 from the source's one.
73 @command{nncp-call} has bad return code if its queues contain unfinished jobs.
76 @command{nncp-ack} command appeared, that sends explicit packet receipt
77 acknowledgement (ACK packet). That acknowledgement deletes referenced
78 packet from the outbound spool.
81 Ability to turn @code{fsync} operation off using @env{$NNCPNOSYNC=1}
85 Added various indices in documentation, that should help searching in it.
90 @section Release 8.5.0
94 Fixed @command{nncp-bundle} workability.
97 Mistakenly @option{-mcd-wait} option was enabled by default in
101 Ability to override internal default timeout for online protocol through
102 @env{$NNCPDEADLINE} environment variable. Can be useful for very high
106 NNCP builds on OpenBSD.
111 @section Release 8.4.0
115 Multicast related interface names (@code{mcd-listen} and @code{mcd-send}
116 configuration options) are now regular expressions. By default
117 @command{nncp-cfgnew} uncomments them now with @code{.*} interface name.
120 @command{nncp-call} command has @option{-mcd-wait} option to wait for
121 multicast packet about node's address.
124 @command{nncp-file} command skips everything that is neither regular
125 file nor directory during pax-archive creation.
130 @section Release 8.3.0
134 Fixed building issues on 32-bit systems.
139 @section Release 8.2.0
143 Yggdrasil uses pure-Go IPv6+TCP network stack, instead of naked μTP
144 transport protocol, making it able to work as an ordinary TCP server
145 inside overlay network.
148 Yggdrasil's @code{prv;bind1,bind2;pub@dots{}}-like configuration strings are
149 replaced with URL-like ones (@code{yggdrasils://PRV?bind=BIND1&bind=BIND2&pub=PUB}).
152 Ability to pass multicast-related parameters to Yggdrasil configuration.
155 @command{nncp-daemon} is able to listen on both TCP and Yggdrasil-driven
156 sockets simultaneously.
159 @command{nncp-daemon}'s listening on peering endpoint socket is optional
160 -- you can be reached through the peers.
165 @section Release 8.1.0
169 @command{nncp-cfgdir} does not require @code{self} section existence in
173 Ability to act as Yggdrasil network client, using online protocol on top of it.
178 @section Release 8.0.2
182 Fixed sending ability to areas.
187 @section Release 8.0.1
191 Fixed incorrect @code{freq.chunked} value calculation. If it was missed,
192 then chunked transfer mode was forcefully turned on anyway.
195 Fixed incorrect full file's size calculation in @file{.nncp.meta}.
200 @section Release 8.0.0
204 @strong{Incompatible} encrypted packet format change: payload and pad
205 sizes are sent in-bound in the encrypted stream. That gives ability to
206 streamingly create encrypted packets, without knowing sizes in advance,
207 without creating temporary file or buffer data in memory.
210 Proper encrypted packet padding verification is done now. This is not
211 critical issue, but previously neither padding value, nor its size were
212 authenticated, giving ability to iteratively strip trailing bytes and
213 determine payload's size by observing the reaction of the encrypted
217 @command{nncp-exec} loses its @option{-use-tmp} option, because of
218 streaming-compatible encrypted packets format.
221 @command{nncp-file} and @command{nncp-exec} commands have
222 @option{-maxsize} option, limiting maximal resulting encrypted packet's
223 maximal size (returning error if it is exceeded). Could be useful,
224 because no payload size could be known in advance.
229 @section Release 7.7.0
233 Experimental @code{kqueue} and @code{inotify} based notifications
234 support about spool directory changes, for reducing their often reading
238 @file{.seen} and @file{.hdr} files moved to @file{seen/} and @file{hdr/}
239 subdirectories, for faster scanning of spool directories.
240 Current files migration required:
243 $ find $NNCPSPOOL -type f -name "*.hdr" -exec rm @{@} +
245 $ find $NNCPSPOOL -type d -name rx | while read rx ; do
248 find . -type f -name "*.seen" | while read fn ; do
249 mv $fn seen/$@{fn%.seen@}
253 $ find $NNCPSPOOL -type d -name area | while read area ; do
254 find $area -type f -name "*.seen" | while read fn ; do
263 @section Release 7.6.0
267 Logging may be done to specified opened file descriptor
268 (@env{$NNCPLOG=FD:5} for example).
269 That is friendly to use under @command{daemontools}.
272 Added additional checks of public keys existence in configuration file,
273 preventing some commands from failing.
278 @section Release 7.5.1
282 NNCP builds on NetBSD.
287 @section Release 7.5.0
291 @command{nncp-daemon} is compatible with UCSPI-TCP interface, so log
292 will contain remote side's address (when running under appropriate
293 utility). @option{-ucspi} option should be used instead of @option{-inetd}.
296 @command{nncp-call} can be UCSPI-TCP client, using @option{-ucspi} option.
299 Do not exit if some of MCD network interfaces can not be listened --
300 only warn about that.
305 @section Release 7.4.0
309 Fixed simultaneous @command{nncp-daemon} and @command{nncp-caller} MCD work.
314 @section Release 7.3.2
318 @command{hjson-cli} utility builds in vendor-mode now.
323 @section Release 7.3.1
327 Fixed possibly left opened file descriptor in online commands.
330 Severely decreased memory usage of MTH hashing.
335 @section Release 7.3.0
339 Fixed some workability problems on 32-bit systems with big files.
342 Ability to use directory with a bunch of files as a configuration.
343 @command{nncp-cfgdir} command appeared.
348 @section Release 7.2.1
352 Small optimizations in online commands.
357 @section Release 7.2.0
361 @command{nncp-trns} command appeared for manual transition packets creation.
364 If destination node of transitional packet has non empty @option{via}
365 route, then do not ignore, but use it.
368 Do not relay multicast packet to area message's originator, that
369 obviously has seen its own packet.
372 Much less memory usage during MTH hashing when offset is zero: when
373 packet is not resumed, but for example checked with @command{nncp-check}
379 @section Release 7.1.1
383 Fixed failing directories @code{fsync} after @file{.seen} file creation.
388 @section Release 7.1.0
392 Multicasting areas feature appeared. Implemented merely by an additional
393 plain packet type with @command{nncp-toss}, @command{nncp-file} and
394 @command{nncp-exec} commands modification.
397 Fixed workability of @command{nncp-file} and @command{nncp-exec}
398 commands, that use temporary file (@code{stdin} and @option{-use-tmp}).
401 Fixed disappearing bad return code in @command{nncp-exec} command.
404 Fixed invalid @file{.hdr} generation when transitional packets are used.
407 @option{-all} option appeared in @command{nncp-rm} command, applying to
408 all the nodes at once.
411 @option{-cycle} option appeared in @command{nncp-check} command, looping
412 the check in infinite cycle.
415 @command{nncp-rm} command can take node alias name.
418 @command{nncp-pkt} can parse @file{.hdr} files.
423 @section Release 7.0.0
427 Minimal required Go version is 1.13.
430 Merkle Tree-based Hashing with BLAKE3 (MTH) is used instead of BLAKE2b.
431 Because of that, there are backward @strong{incompatible} changes of
432 encrypted files (everything laying in the spool directory) and
433 @file{.meta} files of chunked transfer.
435 Current implementation is far from being optimal: it lacks
436 parallelizable calculations and has higher memory consumption: nearly
437 512 KiB for each 1 GiB of file's data. Future performance and memory
438 size optimizations should not lead to packet's format change. But it is
439 still several times faster than BLAKE2b.
442 Resumed online downloads, because of MTH, require reading only of the
443 preceding part of file, not the whole one as was before.
446 @command{nncp-hash} utility appeared for calculating file's MTH hash.
449 BLAKE2 KDF and XOF functions are replaced with BLAKE3 in encrypted
450 packets. Lowering number of used primitives. Also, its encrypted
451 packet's header is used as an associated data during encryption.
454 MultiCast Discovery uses
455 @verb{|ff02::4e4e:4350|} address instead of @verb{|ff02::1|}.
458 @command{nncp-cfgenc} mistakenly asked passphrase three times during encryption.
461 @command{nncp-stat} reports about partly downloaded packets.
464 Updated dependencies.
469 @section Release 6.6.0
473 @command{nncp-daemon}, @command{nncp-call} and @command{nncp-caller}
474 commands wait for all background checksummers completion after
475 connection is finished.
478 Added possibility of address determining through multicast announcement
479 in local area network, so called MCD (MultiCast Discovery).
484 @section Release 6.5.0
488 Fixed segfault in @command{nncp-daemon} when SP handshake did not succeed.
491 Fixed possible bad return code ignoring in automatic tosser.
494 Fixed race during file descriptors closing when online protocol call is
495 finished, that could lead to write error of received packet fragment.
498 Kill all packet transmission progress bars in @command{nncp-daemon},
499 @command{nncp-call} and @command{nncp-caller} when call is finished.
504 @section Release 6.4.0
508 Fixed possible race in online protocol, that lead to panic.
513 @section Release 6.3.0
517 Fixed possible panic while showing progress during online protocol.
522 @section Release 6.2.1
526 Three places in logs contained excess @code{%s}.
531 @section Release 6.2.0
535 Returned @command{nncp-caller}'s @option{-autotoss*} options workability.
538 Yet another logging refactoring and simplification.
539 Should be no visible differences to the end user.
544 @section Release 6.1.0
548 Optimization: most commands do not keep opened file descriptors now.
549 Previously you can exceed maximal number of opened files if you have got
550 many packets in the spool directory.
553 Optimization: do not close file descriptor of the file we download
554 online. Previously each chunk lead to expensive open/close calls.
557 Online downloaded files are saved with @file{.nock} (non-checksummed)
558 suffix, waiting either for @command{nncp-check}, or online daemons to
559 perform integrity check.
562 Optimization: files, that are not resumed, are checksummed immediately
563 during the online download, skipping @file{.nock}-intermediate step.
566 Ability to store encrypted packet's header in @file{.hdr} file, close to
567 the packet itself. That can greatly increase performance of packets
568 listing on filesystems with big block's size.
573 @section Release 6.0.0
577 Log uses human readable and easy machine parseable
578 @url{https://www.gnu.org/software/recutils/, recfile} format for the
579 records, instead of structured RFC 3339 lines. Old logs are not readable
580 by @command{nncp-log} anymore.
583 @option{-autotoss*} option workability with @command{nncp-daemon}'s
584 @option{-inetd} mode.
587 Call's @option{when-tx-exists} allows to make a call only when outbound
588 packets exists. Combined with seconds-aware cron expression that can be
589 used as some kind of auto dialler.
592 @command{nncp-cronexpr} command allows you to check validity and
593 expectations of specified cron expression.
598 @section Release 5.6.0
602 @option{-autotoss*} option runs tosser not after the call, but every
603 second while it is active.
606 @option{autotoss}, @option{autotoss-doseen},
607 @option{autotoss-nofile}, @option{autotoss-nofreq},
608 @option{autotoss-noexec}, @option{autotoss-notrns} options available in
609 @option{calls} configuration section. You can configure per-call
610 automatic tosser options.
613 Use vendoring, instead of @env{$GOPATH} overriding during tarball
614 installation, because current minimal Go's version is 1.12 and it
620 @section Release 5.5.1
624 Respect for @env{$BINDIR}, @env{$INFODIR} and @env{$DOCDIR} environment
625 variables in @file{config} during installation.
630 @section Release 5.5.0
634 Bugfixes in @command{nncp-call(er)}/@command{nncp-daemon},
635 @command{nncp-bundle} and @command{nncp-stat}.
638 @command{nncp-rm} has @option{-dryrun} and @option{-older} options now.
641 @command{nncp-exec} has @option{-use-tmp} and @option{-nocompress}
642 options now. Uncompressed packets are not compatible with previous NNCP
646 @command{nncp-call}, @command{nncp-caller} and @command{nncp-daemon} commands
647 have @option{-autotoss*} options for running tosser after call is ended.
650 Updated dependencies. Minimal required Go version is 1.12.
655 @section Release 5.4.1
659 Fixed @code{SENDMAIL} variable usage during the build.
664 @section Release 5.4.0
668 Updated dependencies.
671 Build system is moved from Makefiles to @url{http://cr.yp.to/redo.html, redo}.
672 This should not influence package maintainers, because minimal @command{redo}
673 implementation is included in tarball.
678 @section Release 5.3.3
682 More various error checks.
685 Updated dependencies.
690 @section Release 5.3.2
694 Fixed incorrect logic of @option{onlinedeadline} timeout, where
695 connection won't take into account incoming packets events and will
696 forcefully disconnect.
701 @section Release 5.3.1
705 Fixed @option{onlinedeadline} workability with call addresses that use
706 external commands (@verb{#"|somecmd"#}).
709 @command{nncp-stat} has @option{-pkt} option displaying information
710 about each packet in the spool.
715 @section Release 5.3.0
719 Progress messages contain prefix, describing the running action.
722 Fixed not occurring handshake messages padding.
725 Finish all SP protocol related goroutines, less memory leak.
728 SP protocol generates less socket write calls, thus generating less TCP
732 Check @option{onlinedeadline} and @option{maxonlinetime} options every
733 second, independently from socket reads (up to 10 seconds).
736 Once per minute, if no other traffic exists, PING packets are sent in
737 SP-connection. That allows faster determining of connection unworkability.
740 @command{nncp-toss} uses lock-file to prevent simultaneous tossing.
745 @section Release 5.2.1
749 Fixed SP protocol error handling, sometimes causing program panic.
754 @section Release 5.2.0
758 Most commands by default show oneline operations progress.
759 @option{-progress}, @option{-noprogress} command line options,
760 @option{noprogress} configuration file option appeared.
763 Fixed incorrect @command{nncp-check} command return code, that returned
764 bad code when everything is good.
767 Free disk space check during @command{nncp-bundle -rx} call.
772 @section Release 5.1.2
776 @strong{Critical} vulnerability: remote peers authentication could lead
777 to incorrect identification of remote side, allowing foreign encrypted
781 Bugfix: private and public Noise keys were swapped in newly created
782 configuration files, that lead to inability to authenticate online peers.
785 Explicit directories @code{fsync}-ing for guaranteed files renaming.
790 @section Release 5.1.1
794 Fixed workability of @command{nncp-file} with @option{-chunked 0} option.
799 @section Release 5.1.0
803 @command{nncp-file} can send directories, automatically creating pax
807 Free disk space is checked during outbound packets creation.
810 @option{freq}, @option{freqminsize}, @option{freqchunked} configuration
811 file options replaced with the structure:
812 @option{freq: @{path: @dots{}, minsize: @dots{}, chunked: @dots{}@}}.
815 Added @option{freq.maxsize} configuration file option, forbidding of
816 freq sending larger than specified size.
819 Ability to notify about successfully executed commands (exec) with
820 @option{notify.exec} configuration file option.
825 @section Release 5.0.0
829 @strong{Incompatible} configuration file format change: YAML is
830 replaced with Hjson, due to its simplicity, without noticeable lack
831 of either functionality or convenience.
834 @strong{Incompatible} plain packet format changes. Older versions are
835 not supported. @code{zlib} compression is replaced with
836 @code{Zstandard}, due to its speed and efficiency, despite library
837 version is not mature enough.
840 Ability to call remote nodes via pipe call of external command, not only
844 @command{nncp-cfgnew} generates configuration file with many
845 comments. @option{-nocomments} option can be used for an old
849 Duplicate filenames have @file{.CTR} suffix, instead of @file{CTR}, to
850 avoid possible collisions with @file{.nncp.chunkCTR}.
853 Ability to override process umask through configuration file option.
856 Files and directories are created with 666/777 permissions by default,
857 allowing control with @command{umask}.
860 Updated dependencies.
863 Full usage of go modules for dependencies management
864 (@code{go.cypherpunks.ru/nncp/v5} namespace is used).
867 Forbid any later GNU GPL version autousage
868 (project's licence now is GNU GPLv3-only).
875 @item Workability on GNU/Linux systems and Go 1.10 is fixed.
883 @strong{Incompatible} encrypted and eblob packet format change: AEAD
884 encryption mode with 128 KiB blocks is used now, because previously
885 @command{nncp-toss} did not verify encrypted packet's MAC before feeding
886 decrypted data to external command. Older versions are not supported.
889 Available free space checking before copying in @command{nncp-xfer},
890 @command{nncp-daemon}, @command{nncp-call(er)}.
893 @command{nncp-call} has ability only to list packets on remote node,
894 without their transmission.
897 @command{nncp-call} has ability to transfer only specified packets.
900 Workability of @option{xxrate} preference in @option{calls}
901 configuration file section.
904 Dependant libraries are updated.
910 Begin using of @code{go.mod} subsystem.
917 @item @command{nncp-daemon} can be run as @command{inetd}-service.
925 @command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller} check
926 if @file{.seen} exists and treat it like file was already downloaded.
927 Possibly it was transferred out-of-bound and remote side needs to be
931 If higher priority packet is spooled, then @command{nncp-daemon} will
932 queue its sending first, interrupting lower priority transmissions.
935 Simple packet rate limiter added to online-related tools
936 (@command{nncp-daemon}, @command{nncp-call}, @command{nncp-caller}).
939 Ability to specify niceness with symbolic notation:
940 @verb{|NORMAL|}, @verb{|BULK+10|}, @verb{|PRIORITY-5|}, etc.
943 Changed default niceness levels:
944 for @command{nncp-exec} from 64 to 96,
945 for @command{nncp-freq} from 64 to 160,
946 for @command{nncp-file} from 196 to 224.
954 @strong{Incompatible} @emph{bundle} archive format changes and
955 @command{nncp-bundle} workability with Go 1.10+. Bundles must be
956 valid tar archives, but Go 1.9 made them invalid because of long paths
957 inside. NNCP accidentally was dependant on that bug. Explicit adding of
958 @file{NNCP/} directory in archive restores workability with valid tar
966 Ability to disable relaying at all using @verb{|-via -|} command line option.
974 @strong{Incompatible} plain packet format changes. Older versions are
978 Ability to queue remote command execution, by configuring @option{exec}
979 option in configuration file and using @command{nncp-exec} command:
982 @command{nncp-mail} command is replaced with more flexible
983 @command{nncp-exec}. Instead of @verb{|nncp-mail NODE RECIPIENT|}
984 you must use @verb{|nncp-exec NODE sendmail RECIPIENT|}.
986 @option{sendmail} configuration file option is replaced with
987 @option{exec}. @code{sendmail: [@dots{}]} must be replaced with
988 @code{exec: sendmail: [@dots{}]}.
992 Ability to override @option{via} configuration option for destination
993 node via @option{-via} command line option for following commands:
994 @command{nncp-file}, @command{nncp-freq}, @command{nncp-exec}.
997 Chunked files, having size less than specified chunk size, will be sent
998 as an ordinary single file.
1001 Exec commands are invoked with additional @env{$NNCP_NICE} and
1002 @env{$NNCP_SELF} environment variables.
1005 Files, that are sent as a reply to freq, have niceness level taken from
1006 the freq packet. You can set desired niceness during @command{nncp-freq}
1007 invocation using @option{-replynice} option.
1010 @command{nncp-toss} command can ignore specified packet types during
1011 processing: @option{-nofile}, @option{-nofreq}, @option{-noexec},
1015 @command{nncp-file} command uses
1016 @option{FreqMinSize}/@option{FreqChunked} configuration file options
1017 for @option{-minsize}/@option{-chunked} by default. You can turn this
1018 off by specifying zero value.
1023 @section Release 2.0
1027 @strong{Incompatible} encrypted/eblob packet format changes. Older
1028 versions are not supported.
1031 Twofish encryption algorithm is replaced with ChaCha20. It is much more
1032 faster. One cryptographic primitive less.
1035 HKDF-BLAKE2b-256 KDF algorithm is replaced with BLAKE2Xb XOF. Yet
1036 another cryptographic primitive less (assuming that BLAKE2X is nearly
1037 identical to BLAKE2).
1042 @section Release 1.0
1046 @strong{Incompatible} encrypted packet format changes. Older versions
1050 @command{nncp-bundle} command can either create stream of encrypted
1051 packets, or digest it. It is useful when dealing with
1052 @code{stdin}/@code{stdout} based transmission methods (like writing to
1053 CD-ROM without intermediate prepared ISO image and working with tape
1057 @command{nncp-toss} is able to create @file{.seen} files preventing
1058 duplicate packets receiving.
1061 Single background checksum verifier worker is allowed in
1062 @command{nncp-call}. This is helpful when thousands of small inbound
1063 packets could create many goroutines.
1066 Ability to override path to spool directory and logfile through either
1067 command line argument, or environment variable.
1070 @command{nncp-rm} is able to delete outbound/inbound, @file{.seen},
1071 @file{.part}, @file{.lock} and temporary files.
1076 @section Release 0.12
1078 @item Sendmail command is called with @env{$NNCP_SENDER} environment variable.
1082 @section Release 0.11
1084 @item @command{nncp-stat}'s command output is sorted by node name.
1088 @section Release 0.10
1091 @command{nncp-freq}'s @file{DST} argument is optional now. Last
1092 @file{SRC} path's element will be used by default.
1096 @section Release 0.9
1099 Fix @option{-rx}/@option{-tx} arguments processing in
1100 @command{nncp-call} command. They were ignored.
1104 @section Release 0.8
1107 Little bugfix in @command{nncp-file} command, where @option{-minsize}
1108 option for unchunked transfer was not in KiBs, but in bytes.
1112 @section Release 0.7
1116 Ability to feed @command{nncp-file} from @code{stdin}, that uses an
1117 encrypted temporary file for that.
1120 Chunked files transmission appeared with corresponding
1121 @command{nncp-reass} command and @option{freqchunked} configuration file
1122 entry. Useful for transferring big files over small storage devices.
1125 @option{freqminsize} configuration file option, analogue to
1126 @option{-minsize} one.
1129 @command{nncp-xfer}'s @option{-force} option is renamed to
1130 @option{-mkdir} for clarity.
1133 @option{-minsize} option is specified in KiBs, not bytes, for
1137 @command{nncp-newcfg} command is renamed to @command{nncp-cfgnew},
1138 and @command{nncp-mincfg} to @command{nncp-cfgmin} -- now they have
1139 common prefix and are grouped together for convenience.
1142 @command{nncp-cfgenc} command appeared, allowing configuration file
1143 encryption/decryption, for keeping it safe without any either OpenPGP or
1144 similar tools usage.
1147 Cryptographic libraries (dependencies) are updated.
1152 @section Release 0.6
1154 @item Small @command{nncp-rm} command appeared.
1155 @item Cryptographic libraries (dependencies) are updated.
1159 @section Release 0.5
1162 Trivial small fix in default niceness level of @command{nncp-file}
1163 and @command{nncp-freq} commands.
1167 @section Release 0.4
1171 Small fix in @command{nncp-call}, @command{nncp-caller},
1172 @command{nncp-daemon}: they can segmentation fail sometimes (no data is
1176 @command{nncp-newnode} renamed to @command{nncp-newcfg} -- it is shorter
1177 and more convenient to use.
1180 @command{nncp-mincfg} command appeared: helper allowing to create
1181 minimalistic stripped down configuration file without private keys, that
1182 is useful during @command{nncp-xfer} usage.
1187 @section Release 0.3
1189 @item Fixed compatibility with Go 1.6.
1193 @section Release 0.2
1197 @strong{Incompatible} packet's format change (magic number is changed
1198 too): size field is encrypted and is not send in plaintext anymore.
1201 @option{-minsize} option gives ability to automatically pad outgoing
1202 packets to specified minimal size.
1205 @command{nncp-daemon} and @command{nncp-call}/@command{nncp-caller}
1206 always check new @emph{tx} packets appearance in the background while
1207 connected. Remote side is immediately notified.
1210 @option{-onlinedeadline} option gives ability to configure timeout of
1211 inactivity of online connection, when it could be disconnected. It could
1212 be used to keep connection alive for a long time.
1215 @option{-maxonlinetime} option gives ability to set maximal allowable
1216 online connection aliveness time.
1219 @command{nncp-caller} command appeared: cron-ed TCP daemon caller.
1222 @command{nncp-pkt} command can decompress the data.