of the modes require special privileges, such as channel operator
or channel founder privileges to work. The mode is added by
adding + before the option(s) and removed by adding - before the
-option(s). The following modes are available:
+option(s). The (*) mark below means that only founder may set/unset
+that mode. Other modes both channel operator and founder may manage.
- p Set/unset channel as private channel
- s Set/unset channel as secret channel
- k Set/unset that channel uses private channel key
- i Set/unset channel as invite only channel
- t Set/unset that only channel operator or
+The following modes are available:
+
+ p Set/unset channel as private channel. Private
+ channels are shown with LIST command with an
+ indication the channel is private. Private
+ channel is not shown on user's joined channel
+ list (with for example WHOIS command).
+
+ s Set/unset channel as secret channel. Secret
+ channels are entirely invisible. They are not
+ shown with LIST command and they do not appear
+ in user's joined channel list.
+
+ k Enable/disable private channel key usage. (*)
+ When enabled KEY command may be used to set
+ private channel key(s) on the channel.
+
+ i Set/unset channel as invite only channel. If
+ you are the founder of the channel you will
+ still be able to join the channel by giving
+ command /JOIN channel -founder.
+
+ t Set/unset that only channel operator or
founder may set channel topic
+
m Set/unset user silencing. Normal users
- are not able to talk on channel. Only
- channel founder may set this mode
+ are not able to talk on channel. (*)
+
M Set/unset operator silencing. Operators
- are not able to talk on channel. Only
- channel founder may set this mode
- l <limit> Set/unset channel's user limit
+ are not able to talk on channel. (*)
+
+ l <limit> Set/unset channel's user count limit
+
a <passphrase> Set/unset passphrase for channel that must
- be provided when joining to the channel.
- c <cipher> Set/unset channel's cipher
- h <hmac> Set/unset channel's hmac
- f <-pubkey|<password>
- Set/unset channel founder authentication.
+ be provided when joining to the channel. (*)
+
+ c <cipher> Set/unset channel's cipher (*)
+
+ h <hmac> Set/unset channel's HMAC (*)
+
+ f [<pubkeyfile> <privkeyfile> [<privkey passphrase>]]
+ Set/unset channel founder authentication. (*)
Channel founder may set this mode so that
- if the client leaves the channel it can
+ when the client leaves the channel it can
claim the founder rights when it returns
- to the channel. If -pubkey is set then
- the authentication will be done using the
- client's public key. You can claim the
- founder rights using the CUMODE command.
+ to the channel, and to set the channel to
+ be permanent channel. You can reclaim the
+ founder rights using CUMODE or JOIN commands.
+
+ If the <pubkeyfile> and <privkeyfile> is
+ provided then the <pubkeyfile> will the used
+ as founder public key, and the private key
+ is used to compute a signature for the SILC
+ server. If these are omitted then the default
+ SILC keypair is used. Normally you do not need
+ to provide these arguments.
+
+ C [{[+|-]<pubkeyfile> }] (*)
+ Set/unset channel public key mode, and add/remove
+ channel publics key from the channel public key
+ list. When this mode is set only those users
+ whose public keys has been added to the list are
+ able to join the channel. Channel founder may set
+ this mode and operate on the channel public key
+ list.
+
+ To add public key to the list give command:
+ CMODE +C +/path/to/the/public_key_file.pub
+
+ To remove one public key from the list give
+ command:
+ CMODE +C -/path/to/the/public_key_file.pub
+
+ To add or remove more than one public keys add as
+ many public key file paths as necessary.
+
+ When this mode is unset (-C), all public keys are
+ removed from the list. If +C is given without
+ arguments the current channel public key list is
+ displayed.
Multiple modes can be set/unset at once if the modes does not
require any arguments. If mode requires an argument then only
one mode can be set at once.
-See also: CUMODE, UMODE
+When the +k (private channel key mode) mode is set the channel's
+default cipher and HMAC are not used. The private key (see /HELP KEY
+for help how to set the private channel key) defines the cipher and HMAC
+for the channel while +k mode is set. Also the +c and +h modes are
+ignored when private channel key mode is set.
+
+Examples:
+
+ Set the channel a permanent (persistent). The channel won't be
+ deleted when last user leaves the channel. When you as the founder
+ leave the channel you will be able to reclaim the founder rights later.
+
+ /CMODE * +f
+
+ Reclaim founder rights (and operator privileges) for you channel:
+
+ /CUMODE * +of mynick
+
+ You can do the same during joining:
+
+ /JOIN yourchannel -founder
+
+ Change channel founder keypair on your channel. You can do this if
+ you want to transfer founder rights to some other user or if you
+ created new keypair. The operation requires that you have a copy of
+ the old keypair:
+
+ /CUMODE * +f mynick /path/to/old/pubkey /path/to/old/privkey
+ /CMODE * +f /path/to/new/pubkey /path/to/new/privkey
+
+ or simply /CMODE * +f if you are already using the new keypair.
+
+ Here's how to transfer founder rights to different user using
+ temporary keypair:
+
+ Create temporary keypair:
+
+ # silc -C
+
+ Become founder on your channel:
+
+ /CUMODE * +f mynick
+
+ Set the temporary keypair on the channel and then send the key
+ pair to your friend with /FILE command or with encrypted Email:
+
+ /CMODE * +f /path/to/temp/pubkey /path/to/temp/privkey
+ (/FILE send /path/to/temp/keypair.tgz yourfriend)
+
+ Tell your friend to give the following command to become founder:
+
+ /CUMODE * +f yourfriend /path/to/temp/pubkey /path/to/temp/privkey
+
+ Your friend then sets his own keypair on the channel:
+
+ /CMODE * +f
+
+ After this the temporary keypair can be removed and your friend has
+ become the founder of the channel. This way the founder rights can
+ be transferred without ever revealing your own keypair. When your
+ friend becomes the founder your founder rights will be removed by
+ the server automatically. It is also possible to continue using the
+ temporary keypair, thus sharing founder rights with two or more users.
+ Note that it is possible for only one user at a time to have founder
+ mode on the channel even if they share the keypair.
+
+See also: CUMODE, UMODE, JOIN, KEY
projects / silc.git / blobdiff