3 .\" Manual for the administration protocol
5 .\" (c) 2008 Straylight/Edgeware
8 .\"----- Licensing notice ---------------------------------------------------
10 .\" This file is part of Trivial IP Encryption (TrIPE).
12 .\" TrIPE is free software; you can redistribute it and/or modify
13 .\" it under the terms of the GNU General Public License as published by
14 .\" the Free Software Foundation; either version 2 of the License, or
15 .\" (at your option) any later version.
17 .\" TrIPE is distributed in the hope that it will be useful,
18 .\" but WITHOUT ANY WARRANTY; without even the implied warranty of
19 .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 .\" GNU General Public License for more details.
22 .\" You should have received a copy of the GNU General Public License
23 .\" along with TrIPE; if not, write to the Free Software Foundation,
24 .\" Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 .\"--------------------------------------------------------------------------
27 .so ../common/defs.man \" @@@PRE@@@
29 .\"--------------------------------------------------------------------------
30 .TH tripe-admin 5 "18 February 2001" "Straylight/Edgeware" "TrIPE: Trivial IP Encryption"
32 .\"--------------------------------------------------------------------------
35 tripe-admin \- administrator commands for TrIPE
37 .\"--------------------------------------------------------------------------
40 This manual page describes the administration interface provided by the
46 program can be used either interactively or in scripts to communicate
47 with the server using this interface. Alternatively, simple custom
48 clients can be written in scripting languages such as Perl, Python or
49 Tcl, or more advanced clients such as GUI monitors can be written in C
50 with little difficulty.
52 Administration commands use a textual protocol. Each client command or
53 server response consists of a line of ASCII text terminated by a single
54 linefeed character. No command may be longer than 255 characters.
55 .SS "General structure"
56 Each command or response line consists of a sequence of
57 whitespace-separated tokens. The number and nature of whitespace
58 characters separating two tokens in a client command is not significant;
59 the server always uses a single space character. The first token in a
62 identifying the type of command or response contained. Keywords in
63 client commands are not case-sensitive; the server always uses uppercase
66 In order to allow tokens to contain internal whitespace, a quoting
67 mechanism is provided. Whitespace within matched pairs of quotes \(en
72 \(en is considered to be internal. Any character (other than newline)
73 may be escaped by preceding it with a backslash
75 in particular, this can be used to include quote characters. It is
76 impossible for a token to contain a newline character.
78 On output, the server will use double quotes when necessary.
80 For simple client command, the server responds with zero or more
82 lines, followed by either an
88 provides information requested in the command. An
90 response contains no further data. A
92 code is followed by a machine-readable explanation of why the command
95 Simple command processing is strictly synchronous: the server reads a
96 command, processes it, and responds, before reading the next command.
97 All commands can be run as simple commands. Long-running commands
102 block the client until they finish, but the rest of the server continues
104 .B "Background commands"
105 to find out how to issue long-running commands without blocking.
106 .SS "Asynchronous broadcasts"
107 There are three types of asynchronous broadcast messages which aren't
108 associated with any particular command. Clients can select which
109 broadcast messages they're interested in using the
115 message contains a machine-readable message warning of an error
116 encountered while processing a command, unexpected or unusual behaviour
117 by a peer, or a possible attack by an adversary. Under normal
118 conditions, the server shouldn't emit any warnings.
122 message contains a human-readable tracing message containing diagnostic
123 information. Trace messages are controlled using the
125 command-line option to the server, or the
127 administration command (see below). Support for tracing can be disabled
128 when the package is being configured, and may not be available in your
133 message is a machine-readable notification about some routine but
134 interesting event such as creation or destruction of peers.
135 .SS "Background commands"
140 take a long time to complete. To prevent these long-running commands
141 from tying up a server connection, they can be run in the background.
142 Not all commands can be run like this: the ones that can provide a
144 option, which must be supplied with a
147 A command may fail before it starts running in the background. In this
148 case, the server emits a
150 response, as usual. To indicate that a command has started running in
151 the background, the server emits a response of the form
152 .BI "BGDETACH " tag \fR,
155 is the value passed to the
157 option. From this point on, the server is ready to process more
158 commands and reply to them.
160 Responses to background commands are indicated by a line beginning with
166 followed by the command tag. These correspond to the
171 responses for simple commands:
173 indicates information from a background command which has not completed
178 indicates that a background command succeeded or failed, respectively.
180 A background command will never issue an
184 response: it will always detach and then issue any
189 .SS "Client-provided services"
190 .\"* 25 Service-related messages
191 An administration client can provide services to other clients.
192 Services are given names and versions. A client can attempt to
194 a particular service by issuing the
196 command. This may fail, for example, if some other client already
197 provides the same or later version of the service.
199 Other clients can issue
200 .I "service commands"
203 command; the service provider is expected to handle these commands and
206 There are three important asynchronous messages which will be sent to
209 .BI "SVCCANCEL " jobid
210 The named job has been cancelled, either because the issuing client has
211 disconnected or explicitly cancelled the job using the
215 .BI "SVCCLAIM " service " " version
216 Another client has claimed a later version of the named
218 The recipient is no longer the provider of this service.
220 .BI "SVCJOB " jobid " " service " " command " " args \fR...
221 Announces the arrival of a new job. The
223 is a simple token consisting of alphanumeric characters which
225 uses to identify this job.
227 The service provider can reply to the job using the commands
232 The first of these sends an
234 response and leaves the job active; the other two send an
238 response respectively, and mark the job as being complete.
242 is a potentially long-running command, it can be run in the background.
243 This detail is hidden from service providers:
245 will issue the corresponding
247 responses when appropriate.)
248 .SS "Network addresses"
249 A network address is a sequence of tokens. The first is a token
250 identifying the network address family. The length of an address and
251 the meanings of the subsequent tokens depend on the address family.
252 Address family tokens are not case-sensitive on input; on output, they
253 are always in upper-case.
255 At present, only one address family is understood.
257 .BI "INET " address " \fR[" port \fR]
258 An Internet socket, naming an IPv4 address and UDP port. On output, the
259 address is always in numeric dotted-quad form, and the port is given as
260 a plain number. On input, DNS hostnames and symbolic port names are
261 permitted; if omitted, the default port 4070 is used. Name resolution
262 does not block the main server, but will block the requesting client,
263 unless the command is run in the background.
265 If, on input, no recognized address family token is found, the following
266 tokens are assumed to represent an
268 address. Addresses output by the server always have an address family
270 .SS "Key-value output"
275 produce output in the form of
277 pairs, one per token. Neither the
283 Commands which enable or disable kinds of output (e.g.,
287 work in similar ways. They take a single optional argument, which
288 consists of a string of letters selecting message types, optionally
293 to disable, the subsequently listed types.
295 If the argument is omitted, the available message types are displayed,
298 line, in a fixed-column format. Column zero contains the key letter for
299 selecting that message type; column one contains either a space or a
301 sign, if the message type is disabled or enabled respectively; and a
302 textual description of the message type begins at column 3 and continues
303 to the end of the line.
305 Lowercase key letters control individual message types. Uppercase key
306 letters control collections of message types.
308 .\"--------------------------------------------------------------------------
309 .SH "COMMAND REFERENCE"
312 The commands provided are:
314 .BI "ADD \fR[" options "\fR] " peer " " address "\fR..."
315 Adds a new peer. The peer is given the name
317 the peer's public key is assumed to be in the file
319 (or whatever alternative file was specified in the
321 option on the command line). The
323 is the network address (see above for the format) at which the peer can
324 be contacted. The following options are recognized.
328 .BI "\-background " tag
329 Run the command in the background, using the given
333 Don't send an immediate challenge to the peer; instead, wait until it
334 sends us something before responding.
336 .BI "\-keepalive " time
337 Send a no-op packet if we've not sent a packet to the peer in the last
339 interval. This is useful for persuading port-translating firewalls to
340 believe that the `connection' is still active. The
342 is expressed as a nonnegative integer followed optionally by
348 for days, hours, minutes, or seconds respectively; if no suffix is
349 given, seconds are assumed.
354 to authenticate the peer. The default is to use the key tagged
358 The peer is a mobile device, and is likely to change address rapidly.
359 If a packet arrives from an unknown address, the server's usual response
360 is to log a warning and discard it. If the server knows of any mobile
361 peers, however, it will attempt to decrypt the packet using their keys,
362 and if one succeeds, the server will update its idea of the peer's
367 .BI "\-tunnel " tunnel
368 Use the named tunnel driver, rather than the default.
375 line reporting the IP address and port number stored for
378 .BI "ALGS \fR[" peer \fR]
379 Emits information about the cryptographic algorithms in use, in
382 is given, then describe the algorithms used in the association with that
383 peer; otherwise describe the default algorithms.
386 The keys are as follows.
389 Type of key-exchange group in use, currently either
394 .B kx-group-order-bits
395 Length of the group order, in bits. This gives an approximate measure
396 of the group strength.
399 Length of a group element, in bits. This may be useful when analyzing
403 The hash function in use, e.g.,
407 The mask-generating function in use, e.g.,
411 The size of the hash function's output, in octets.
414 The name of the bulk data cipher in use, e.g.,
418 The length of key used by the bulk data cipher, in octets.
421 The block size of the bulk data cipher, or zero if it's not based on a
425 The maximum amount of data to be encrypted using a single key. (A new
426 key exchange is instigated well before the limit is reached, in order to
427 allow for a seamless changeover of keys.)
430 The message authentication algorithm in use, e.g.,
431 .BR ripemd160-hmac ..
434 The length of the key used by the message authentication algorithm, in
438 The length of the message authentication tag, in octets.
440 The various sizes are useful, for example, when computing the MTU for a
443 is the MTU of the path to the peer, then the tunnel MTU should be
451 allowing 20 bytes of IP header, 8 bytes of UDP header, a packet type
452 octet, a four-octet sequence number, an IV, and a MAC tag.
456 Cancels the background job with the named
459 .BI "CHECKCHAL " challenge
460 Verifies a challenge as being one earlier issued by
462 and not previously either passed to
464 or in a greeting message.
467 Causes the server to disassociate itself from its terminal and become a
468 background task. This only works once. A warning is issued.
470 .BI "EPING \fR[" options "\fR] " peer
471 Sends an encrypted ping to the peer, and expects an encrypted response.
472 This checks that the peer is running (and not being impersonated), and
473 that it can encrypt and decrypt packets correctly. Options and
474 responses are the same as for the
479 Requests the server to begin a new key exchange with
484 Requests a challenge. The challenge is returned in an
486 line, as a base64-encoded string. See
489 .BI "GREET " peer " " challenge
490 Sends a greeting packet containing the
492 (base-64 encoded) to the named
494 The expectation is that this will cause the peer to recognize us and
495 begin a key-exchange.
498 Causes the server to emit an
500 line for each command it supports. Each line lists the command name,
501 followed by the names of the arguments. This may be helpful as a memory
502 aid for interactive use, or for program clients probing for features.
507 line containing the name of the network interface used to collect IP
508 packets which are to be encrypted and sent to
510 Used by configuration scripts so that they can set up routing tables
511 appropriately after adding new peers.
516 line giving the tag for each outstanding background job.
519 Causes the server to forget all about
521 All keys are destroyed, and no more packets are sent. No notification
522 is sent to the peer: if it's important that the peer be notified, you
523 must think of a way to do that yourself.
526 For each currently-known peer, an
528 line is written containing the peer's name, as given to
531 .BI "NOTIFY " tokens\fR...
534 notification to all interested administration clients.
537 Returns information about a peer, in key-value form. The following keys
542 The tunnel driver used for this peer.
545 The keepalive interval, in seconds, or zero if no keepalives are to be
549 The key tag being used for the peer, as passed to the
551 command. (You don't get a full key-id, since that might change while
552 the daemon's running.)
555 .BI "PING \fR[" options "\fR] " peer
556 Send a transport-level ping to the peer. The ping and its response are
557 not encrypted or authenticated. This command, possibly in conjunction
558 with tracing, is useful for ensuring that UDP packets are actually
559 flowing in both directions. See also the
565 line is printed describing the outcome:
568 .BI "ping-ok " millis
569 A response was received
571 after the ping was sent.
574 No response was received within the time allowed.
577 The peer was killed (probably by another admin connection) before a
578 response was received.
581 Options recognized for this command are:
585 .BI "\-background " tag
586 Run the command in the background, using the given
589 .BI "\-timeout " time
592 seconds before giving up on a response. The default is 5 seconds. The
594 is expressed as a nonnegative integer followed optionally by
600 for days, hours, minutes, or seconds respectively; if no suffix is
601 given, seconds are assumed.
608 line containing just the number of the UDP port used by the
610 server. If you've allowed your server to allocate a port dynamically,
611 this is how to find out which one it chose.
614 Instructs the server to recheck its keyring files. The server checks
615 these periodically anyway but it may be necessary to force a recheck,
616 for example after adding a new peer key.
619 Instructs the server to exit immediately. A warning is sent.
622 Returns information about the server, in the form of key-value pairs.
623 The following keys are used.
627 A keyword naming the implementation of the
629 server. The current implementation is called
633 The server's version number, as reported by
641 if the server has or hasn't (respectively) become a daemon.
644 .BI "SETIFNAME " peer " " new-name
645 Informs the server that the
647 tunnel-interface name has been changed to
649 This is useful if firewalling decisions are made based on interface
650 names: a setup script for a particular peer can change the name, and
651 then update the server's records so that they're accurate.
653 .BI "SVCCLAIM " service " " version
654 Attempts to claim the named
658 The claim is successful if the service is currently unclaimed, or if
659 a version earlier than
661 is provided; otherwise the command fails with the error
662 .BR "service-exists" .
664 .BI "SVCENSURE " service " \fR[" version \fR]
667 is provided, and (if specified) to at least the given
669 An error is reported if these conditions are not met; otherwise the
670 command succeeds silently.
672 .BI "SVCFAIL " jobid " " tokens \fR...
677 response to the service job with the given
681 as the reason for failure. The job is closed.
683 .BI "SVCINFO " jobid " " tokens \fR...
688 response to the service job with the given
692 as the info message. The job remains open.
695 Output a line of the form
702 for each service currently provided.
710 response to the service job with the given
714 .BI "SVCQUERY " service
717 lines in key-value format, describing the named
719 The following keys are used.
726 The service's version string.
729 .BI "SVCRELEASE " service
730 Announce that the client no longer wishes to provide the named
733 .BI "SVCSUBMIT \fR[" options "\fR] " service " " command " " arguments \fR...
734 Submit a job to the provider of the given
740 The following options are accepted.
744 .BI "\-background " tag
745 Run the command in the background, using the given
748 .BI "\-version " version
749 Ensure that at least the given
751 of the service is available before submitting the job.
758 lines, each containing one or more statistics in the form
759 .IB name = value \fR.
760 The statistics-gathering is experimental and subject to change.
762 .BR "TRACE " [\fIoptions\fP]
763 Selects trace outputs: see
765 above. Message types provided are:
768 Currently, the following tracing options are supported:
771 Tunnel events: reception of packets to be encrypted, and injection of
772 successfully-decrypted packets.
775 Peer management events: creation and destruction of peer attachments,
776 and arrival of messages.
779 Administration interface: acceptance of new connections, and handling of
780 the backgroud name-resolution required by the
785 Handling of symmetric keysets: creation and expiry of keysets, and
786 encryption and decryption of messages.
789 Key exchange: reception, parsing and emission of key exchange messages.
792 Key management: loading keys and checking for file modifications.
795 Display information about challenge issuing and verification.
798 Display contents of packets sent and received by the tunnel and/or peer
802 Display inputs, outputs and intermediate results of cryptographic
803 operations. This includes plaintext and key material. Use with
815 outputs provide extra detail for other outputs. Specifying
821 isn't useful; neither is specifying
832 For each available tunnel driver, an
834 line is printed giving its name.
837 Causes the server to emit an
839 line stating its software version, as two tokens: the server name, and
840 its version string. The server name
842 is reserved to the Straylight/Edgeware implementation.
844 .BR "WATCH " [\fIoptions\fP]
845 Enables or disables asynchronous broadcasts
846 .IR "for the current connection only" .
849 above. The default watch state for the connection the server opens
850 automatically on stdin/stdout is to show warnings and trace messages;
851 other connections show no asynchronous broadcast messages. (This is
852 done in order to guarantee that a program reading the server's stdout
853 does not miss any warnings.)
856 Message types provided are:
874 .BI "WARN " tokens\fR...
877 warning to all interested administration clients.
879 .\"--------------------------------------------------------------------------
882 .\"* 20 Error messages (FAIL codes)
887 messages are sent to clients as a result of errors during command
895 server is already running as a daemon.
897 .BI "bad-addr-syntax " message
898 (For commands accepting socket addresses.) The address couldn't be
901 .BI "bad-syntax " cmd " " message
902 (For any command.) The command couldn't be understood: e.g., the number
903 of arguments was wrong.
905 .BI "bad-time-spec " token
908 is not a valid time interval specification. Acceptable time
909 specifications are nonnegative integers followed optionally by
915 for days, hours, minutes, or seconds, respectively.
917 .BI "bad-trace-option " char
920 An unknown trace option was requested.
922 .BI "bad-watch-option " char
925 An unknown watch option was requested.
927 .BI "daemon-error " ecode " " message
930 An error occurred during the attempt to become a daemon, as reported by
933 .BI "invalid-port " number
936 The given port number is out of range.
938 .BI "not-service-provider " service
941 The invoking client is not the current provider of the named
943 and is therefore not allowed to release it.
945 .BI "peer-create-fail " peer
950 failed for some reason. A warning should have been emitted explaining
953 .BI "peer-addr-exists " address\fR...
956 There is already a peer with the given
959 .BI "peer-exists " peer
962 There is already a peer named
965 .B "ping-send-failed"
966 The attempt to send a ping packet failed, probably due to lack of
969 .BI "resolve-error " hostname
974 could not be resolved.
976 .BI "resolver-timeout " hostname
981 took too long to resolve.
983 .BI "service-exists " service " " version
986 Another client is already providing the stated
991 .BI "service-too-old " service " " version
1000 is available, which does not meet the stated requirements.
1002 .BI "tag-exists " tag
1003 (For long-running commands.) The named
1005 is already the tag of an outstanding job.
1007 .BI "unknown-command " token
1012 .BI "unknown-jobid " jobid
1020 is not recognized as identifying an outstanding job. It may have just
1023 .BI "unknown-peer " name
1031 There is no peer called
1034 .BI "unknown-port " port
1039 couldn't be found in
1042 .BI "unknown-service " service
1051 is not recognized as the name of a client-provided service.
1053 .BI "unknown-tag " tag
1058 is not the tag for any outstanding background job. It may have just
1061 .\"--------------------------------------------------------------------------
1064 .\"* 30 Notification broadcasts (NOTE codes)
1065 The following notifications are sent to clients who request them.
1067 .BI "ADD " peer " " ifname " " address \fR...
1068 A new peer has been added. The peer's name is
1070 its tunnel is network interface
1072 and its network address is
1076 The server has forked off into the sunset and become a daemon.
1078 .BI "GREET " challenge " " address \fR...
1079 A valid greeting was received, with the given challenge (exactly as it
1092 finished successfully.
1097 has begun or restarted. If key exchange keeps failing, this message
1098 will be repeated periodically.
1100 .BI "NEWADDR " peer " " address
1103 IP address has been changed to
1106 .BI "NEWIFNAME " peer " " old-name " " new-name
1109 tunnel interface name has been changed from
1117 .BI "SVCCLAIM " service " " version
1120 is now available, at the stated
1123 .BI "SVCRELEASE " service
1126 is no longer available.
1128 .BI "USER " tokens\fR...
1129 An administration client issued a notification using the
1133 .\"--------------------------------------------------------------------------
1136 .\"* 40 Warning broadcasts (WARN codes)
1138 There are many possible warnings. They are categorized according to
1141 Many of these warnings report system errors. These are reported as a
1142 pair of tokens, described below as
1148 is a string of the form
1152 value of the error; the
1154 is the `human-readable' form of the message, as reported by
1156 .SS "ABORT warnings"
1157 These all indicate that the
1159 server has become unable to continue. If enabled, the server will dump
1160 core in its configuration directory.
1162 .BI "ABORT repeated-select-errors"
1163 The main event loop is repeatedly failing. If the server doesn't quit,
1164 it will probably waste all available CPU doing nothing.
1165 .SS "ADMIN warnings"
1166 These indicate a problem with the administration socket interface.
1168 .BI "ADMIN accept-error " ecode " " message
1169 There was an error while attempting to accept a connection from a new
1172 .BI "ADMIN client-write-error " ecode " " message
1173 There was an error sending data to a client. The connection to the
1174 client has been closed.
1176 These indicate errors in challenges, either in the
1178 command or in greeting packets.
1180 .B "CHAL impossible-challenge"
1181 The server hasn't issued any challenges yet. Quite how anyone else
1182 thought he could make one up is hard to imagine.
1184 .B "CHAL incorrect-tag"
1185 Challenge received contained the wrong authentication data. It might be
1186 very stale, or a forgery.
1188 .B "CHAL invalid-challenge"
1189 Challenge received was the wrong length. We might have changed MAC
1190 algorithms since the challenge was issued, or it might just be rubbish.
1192 .B "CHAL replay duplicated-sequence"
1193 Challenge received was a definite replay of an old challenge. Someone's
1196 .B "CHAL replay old-sequence"
1197 Challenge received was old, but maybe not actually a replay. Try again.
1198 .SS "KEYMGMT warnings"
1199 These indicate a problem with the keyring files, or the keys stored in
1200 them. The first token is either
1206 in the descriptions below) indicating which keyring file is problematic,
1207 and the second token is the filename of the keyring. Frequently a key
1208 tag may be given next, preceded by the token
1211 .BI "KEYMGMT public-keyring " file " key " tag " algorithm-mismatch"
1212 A peer's public key doesn't request the same algorithms as our private
1215 .BI "KEYMGMT " which "-keyring " file " key " tag " bad-tag-length " len
1216 The key attributes specify the length of MAC tag as
1218 but this is an invalid value \(en either too large or not a multiple of
1221 .BI "KEYMGMT " which "-keyring " file " key " tag " bad-tag-length-string " str
1222 The key attributes contain
1224 where a MAC tag length was expected. The key was generated wrongly.
1226 .BI "KEYMGMT private-keyring " file " key " tag " changed-group"
1227 The private keyring has been changed, but the new private key can't be
1228 used because it uses a different group for Diffie\(enHellman key
1231 .BI "KEYMGMT " which "-keyring " file " io-error " ecode " " message
1232 A system error occurred while opening or reading the keyring file.
1234 .BI "KEYMGMT " which "-keyring " file " key " tag " unknown-cipher " cipher
1235 The key specifies the use of an unknown symmetric encryption algorithm
1237 Maybe the key was generated wrongly, or maybe the version of
1238 Catacomb installed is too old.
1240 .BI "KEYMGMT " which "-keyring " file " key " tag " unknown-group-type " type
1241 The key specifies the use of a Diffie\(enHellman group of an unknown
1243 Maybe the key was generated wrongly, or maybe the version of
1247 .BI "KEYMGMT " which "-keyring " file " key " tag " unknown-hash " hash
1248 The key specifies the use of an unknown hash function
1250 Maybe the key was generated wrongly, or maybe the version of Catacomb
1251 installed is too old.
1253 .BI "KEYMGMT " which "-keyring " file " key " tag " unknown-mac " mac
1254 The key specifies the use of an unknown message authentication code
1256 Maybe the key was generated wrongly, or maybe the version of Catacomb
1257 installed is too old.
1259 .BI "KEYMGMT " which "-keyring " file " key " tag " unknown-mgf-cipher " mgf
1260 The key specifies the use of an unknown symmetric encryption function
1262 for mask generation. Maybe the key was generated wrongly, or maybe the
1263 version of Catacomb installed is too old.
1265 .BI "KEYMGMT " which "-keyring " file " key " tag " no-hmac-for-hash " hash
1266 No message authentication code was given explicitly, and there's no
1267 implementation of HMAC for the selected hash function
1270 .BI "KEYMGMT " which "-keyring " file " key " tag " " alg " " name " no-key-size " hashsz
1277 The named algorithm requires more key material than the hash function
1278 can provide. You must change either the hash function, or the cipher or
1281 .BI "KEYMGMT " which "-keyring " file " key " tag " mgf " mgf " restrictive-key-schedule"
1282 The cipher selected for mask-generation is unsuitable because it can't
1283 accept arbitrary-sized keys.
1285 .BI "KEYMGMT " which "-keyring " file " key-not-found " tag
1288 couldn't be found in the keyring.
1290 .BI "KEYMGMT " which "-keyring " file " line " line " " message
1291 The contents of the keyring file are invalid. There may well be a bug
1296 These indicate problems during key-exchange. Many indicate either a bug
1297 in the server (either yours or the remote one), or some kind of attack
1298 in progress. All name a
1300 as the second token: this is the peer the packet is apparently from,
1301 though it may have been sent by an attacker instead.
1303 In the descriptions below,
1305 is one of the tokens
1314 .BI "KX " peer " algorithms-mismatch local-private-key " privtag " peer-public-key " pubtag
1315 The algorithms specified in the peer's public key
1317 don't match the ones described in the private key
1320 .BI "KX " peer " bad-expected-reply-log"
1323 uses in its protocol contain a check value which proves that the
1324 challenge is honest. This message indicates that the check value
1325 supplied is wrong: someone is attempting to use bogus challenges to
1328 server to leak private key information. No chance!
1330 .BI "KX " peer " decrypt-failed reply\fR|\fBswitch-ok"
1331 A symmetrically-encrypted portion of a key-exchange message failed to
1334 .BI "KX " peer " invalid " msgtoken
1335 A key-exchange message was malformed. This almost certainly indicates a
1338 .BI "KX " peer " incorrect cookie\fR|\fBswitch-rq\fR|\fBswitch-ok"
1339 A message didn't contain the right magic data. This may be a replay of
1340 some old exchange, or random packets being sent in an attempt to waste
1343 .BI "KX " peer " " which "-key-expired"
1344 The local private key or the peer's public key (distinguished by
1346 has expired. Either you or the peer's maintainer should have arranged
1347 for a replacement before now.
1349 .BI "KX " peer " sending-cookie"
1350 We've received too many bogus pre-challenge messages. Someone is trying
1351 to flood us with key-exchange messages and make us waste CPU on doing
1352 hard asymmetric crypto sums.
1354 .BI "KX " peer " unexpected " msgtoken
1355 The message received wasn't appropriate for this stage of the key
1356 exchange process. This may mean that one of our previous packets got
1359 it may simply mean that the peer has recently restarted.
1361 .BI "KX " peer " unknown-challenge"
1362 The peer is asking for an answer to a challenge which we don't know
1363 about. This may mean that we've been inundated with challenges from
1364 some malicious source
1365 .I who can read our messages
1366 and discarded the valid one.
1368 .BI "KX " peer " unknown-message 0x" nn
1369 An unknown key-exchange message arrived.
1371 These are largely concerned with management of peers and the low-level
1372 details of the network protocol. The second token is usually the name of
1375 if none is relevant.
1377 .BI "PEER " peer " bad-packet no-type"
1378 An empty packet arrived. This is very strange.
1380 .BI "PEER " peer " bad-packet unknown-category 0x" nn
1381 The message category
1383 (in hex) isn't understood. Probably a strange random packet from
1384 somewhere; could be an unlikely bug.
1386 .BI "PEER " peer " bad-packet unknown-type 0x" nn
1389 (in hex) isn't understood. Probably a strange random packet from
1390 somewhere; could be an unlikely bug.
1392 .BI "PEER " peer " corrupt-encrypted-ping"
1393 The peer sent a ping response which matches an outstanding ping, but its
1394 payload is wrong. There's definitely a bug somewhere.
1396 .BI "PEER " peer " corrupt-transport-ping"
1397 The peer (apparently) sent a ping response which matches an outstanding
1398 ping, but its payload is wrong. Either there's a bug, or the bad guys
1399 are playing tricks on you.
1401 .BI "PEER " peer " decrypt-failed"
1402 An encrypted IP packet failed to decrypt. It may have been mangled in
1403 transit, or may be a very old packet from an expired previous session
1404 key. There is usually a considerable overlap in the validity periods of
1405 successive session keys, so this shouldn't occur unless the key exchange
1406 takes ages or fails.
1408 .BI "PEER " peer " malformed-encrypted-ping"
1409 The peer sent a ping response which is hopelessly invalid. There's
1410 definitely a bug somewhere.
1412 .BI "PEER " peer " malformed-transport-ping"
1413 The peer (apparently) sent a ping response which is hopelessly invalid.
1414 Either there's a bug, or the bad guys are playing tricks on you.
1416 .BI "PEER " peer " packet-build-failed"
1417 There wasn't enough space in our buffer to put the packet we wanted to
1418 send. Shouldn't happen.
1420 .BI "PEER \- socket-read-error " ecode " " message
1421 An error occurred trying to read an incoming packet.
1423 .BI "PEER " peer " socket-write-error " ecode " " message
1424 An error occurred attempting to send a network packet. We lost that
1427 .BI "PEER " peer " unexpected-encrypted-ping 0x" id
1428 The peer sent an encrypted ping response whose id doesn't match any
1429 outstanding ping. Maybe it was delayed for longer than the server was
1430 willing to wait, or maybe the peer has gone mad.
1432 .BI "PEER \- unexpected-source " address\fR...
1433 A packet arrived from
1435 (a network address \(en see above), but no peer is known at that
1436 address. This may indicate a misconfiguration, or simply be a result of
1437 one end of a connection being set up before the other.
1439 .BI "PEER " peer " unexpected-transport-ping 0x" id
1440 The peer (apparently) sent a transport ping response whose id doesn't
1441 match any outstanding ping. Maybe it was delayed for longer than the
1442 server was willing to wait, or maybe the peer has gone mad; or maybe
1443 there are bad people trying to confuse you.
1444 .SS "SERVER warnings"
1445 These indicate problems concerning the server process as a whole.
1447 .BI "SERVER ignore signal " name
1448 A signal arrived, but the server ignored it. Currently this happens for
1450 because that's a popular way of telling daemons to re-read their
1451 configuration files. Since
1453 re-reads its keyrings automatically and has no other configuration
1454 files, it's not relevant, but it seemed better to ignore the signal than
1457 .BI "SERVER quit signal " \fR[\fInn\fR|\fIname\fR]
1458 A signal arrived and
1462 .BI "SERVER quit admin-request"
1463 A client of the administration interface issued a
1467 .BI "SERVER quit foreground-eof"
1468 The server is running in foreground mode (the
1470 option), and encountered end-of-file on standard input.
1472 .BI "SERVER select-error " ecode " " message
1473 An error occurred in the server's main event loop. This is bad: if it
1474 happens too many times, the server will abort.
1476 These are concerned with the symmetric encryption and decryption
1479 .BI "SYMM replay old-sequence"
1480 A packet was received with an old sequence number. It may just have
1481 been delayed or duplicated, or it may have been an attempt at a replay
1484 .BI "SYMM replay duplicated-sequence"
1485 A packet was received with a sequence number we've definitely seen
1486 before. It may be an accidental duplication because the 'net is like
1487 that, or a deliberate attempt at a replay.
1489 These concern the workings of the system-specific tunnel driver. The
1490 second token is the name of the tunnel interface in question, or
1494 .BI "TUN \- bsd no-tunnel-devices"
1495 The driver couldn't find an available tunnel device. Maybe if you
1498 files, it will work.
1500 .BI "TUN \- " tun-name " open-error " device " " ecode " " message
1501 An attempt to open the tunnel device file
1505 .BI "TUN \- linux config-error " ecode " " message
1506 Configuring the Linux TUN/TAP interface failed.
1508 .BI "TUN " ifname " " tun-name " read-error " ecode " " message
1509 Reading from the tunnel device failed.
1511 .BI "TUN " ifname " " tun-name " write-error " ecode " " message
1512 Writing from the tunnel device failed.
1514 .BI "TUN " ifname " slip bad-escape"
1515 The SLIP driver encountered a escaped byte it wasn't expecting to see.
1516 The erroneous packet will be ignored.
1518 .BI "TUN " ifname " slip eof"
1519 The SLIP driver encountered end-of-file on its input descriptor.
1520 Pending data is discarded, and no attempt is made to read any more data
1521 from that interface ever.
1523 .BI "TUN " ifname " slip escape-end"
1524 The SLIP driver encountered an escaped `end' marker. This probably
1525 means that someone's been sending it junk. The erroneous packet is
1526 discarded, and we hope that we've rediscovered synchronization.
1528 .BI "TUN \- slip fork-error " ecode " " message
1529 The SLIP driver encountered an error forking a child process while
1530 allocating a new dynamic interface.
1532 .BI "TUN \- slip no-slip-interfaces"
1533 The driver ran out of static SLIP interfaces. Either preallocate more,
1534 or use dynamic SLIP interface allocation.
1536 .BI "TUN " ifname " slip overflow"
1537 The SLIP driver gave up reading a packet because it got too large.
1539 .BI "TUN \- slip pipe-error " ecode " " message
1540 The SLIP driver encountered an error creating pipes while allocating a
1541 new dynamic interface.
1543 .BI "TUN \- slip read-ifname-failed " ecode " " message
1544 The SLIP driver encountered an error reading the name of a dynamically
1545 allocated interface. Maybe the allocation script is broken.
1547 .BI "TUN \- unet config-error " ecode " " message
1548 Configuring the Linux Unet interface failed. Unet is obsolete and
1549 shouldn't be used any more.
1551 .BI "TUN \- unet getinfo-error " ecode " " message
1552 Reading information about the Unet interface failed. Unet is obsolete
1553 and shouldn't be used any more.
1555 These are issued by administration clients using the
1559 .BI "USER " tokens\fR...
1560 An administration client issued a warning.
1563 .\"--------------------------------------------------------------------------
1566 .SS "Command responses"
1569 .BI "BGFAIL " tag " " tokens \fR...
1570 .BI "BGINFO " tag " " tokens \fR...
1572 .BI "FAIL " tokens \fR...
1573 .BI "INFO " tokens \fR...
1578 .\"--------------------------------------------------------------------------
1584 .IR "The Trivial IP Encryption Protocol" .
1586 .\"--------------------------------------------------------------------------
1589 Mark Wooding, <mdw@distorted.org.uk>
1591 .\"----- That's all, folks --------------------------------------------------
~mdw / tripe / blob