Errors
The D-Bus errors used in Telepathy all start with
org.freedesktop.Telepathy.Error.. They are used in
D-Bus messages of type ERROR, and also as plain strings annotated with
the DBus_Error_Name type.
In principle, any method can raise any error (this is a general fact
of IPC). For instance, generic D-Bus errors starting with
org.freedesktop.DBus.Error. will occur in some
situations.
Telepathy methods can also raise implementation-specific errors to indicate specialized failure conditions. For better interoperability, if a suitable Telepathy error exists, it should be preferred.
The namespace org.freedesktop.Telepathy.Qt4.Error.
is reserved for use by the D-Bus client implementation in telepathy-qt4,
which uses it to represent certain error situations that did not involve
a D-Bus ERROR message. These errors are defined and documented as part of
telepathy-qt4's C++ API, and should not be used on D-Bus.
Errors
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Already Connected
org.freedesktop.Telepathy.Error.AlreadyConnected
Raised when the user attempts to connect to an account but they are
already connected (perhaps from another client or computer), and the
protocol or account settings do not allow this.
Rationale:
XMPP can have this behaviour if the user chooses the same resource
in both clients (it is server-dependent whether the result is
AlreadyConnected on the new connection, ConnectionReplaced on the
old connection, or two successful connections).
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Authentication Failed
org.freedesktop.Telepathy.Error.AuthenticationFailed
Raised when authentication with a service was unsuccessful.
Rationale:
This corresponds to Authentication_Failed in the
Connection_Status_Reason enum.
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Busy
org.freedesktop.Telepathy.Error.Busy
Used to represent a user being removed from a channel because of a
"busy" indication. This error SHOULD NOT be used to represent a server
or other infrastructure being too busy to process a request - for that,
see ServerBusy.
Rationale:
This corresponds to Busy in the
Channel_Group_Change_Reason enum.
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Cancelled
org.freedesktop.Telepathy.Error.Cancelled
Raised by an ongoing request if it is cancelled by user request before
it has completed, or when operations are performed on an object which
the user has asked to close (for instance, a Connection where the user
has called Disconnect, or a Channel where the user has called Close).
Rationale:
The second form can be used to correspond to the Requested member in
the Connection_Status_Reason enum, or to
to represent the situation where disconnecting a Connection,
closing a Channel, etc. has been requested by the user but this
request has not yet been acted on, for instance because the
service will only act on the request when it has finished processing
an event queue.
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Cert.Expired
org.freedesktop.Telepathy.Error.Cert.Expired
Raised if the server provided an expired SSL/TLS certificate.
Rationale:
This corresponds to Cert_Expired in the
Connection_Status_Reason enum and to Expired in
the TLS_Certificate_Reject_Reason enum.
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Cert.Fingerprint Mismatch
org.freedesktop.Telepathy.Error.Cert.FingerprintMismatch
Raised if the server provided an SSL/TLS certificate that did not have
the expected fingerprint.
Rationale:
This corresponds to Cert_Fingerprint_Mismatch in the
Connection_Status_Reason enum and to
Fingerprint_Mismatch in the TLS_Certificate_Reject_Reason enum.
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Cert.Hostname Mismatch
org.freedesktop.Telepathy.Error.Cert.HostnameMismatch
Raised if the server provided an SSL/TLS certificate that did not match its hostname.
You MAY be able to get more details about the expected and certified hostnames by looking up the 'expected-hostname' and 'certificate-hostname' keys in the details map that came together with this error.
Rationale:
This corresponds to Cert_Hostname_Mismatch in the
Connection_Status_Reason enum and to Hostname_Mismatch
in the TLS_Certificate_Reject_Reason enum.
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Cert.Insecure
org.freedesktop.Telepathy.Error.Cert.Insecure
Added in 0.19.11.
Raised if the server provided an SSL/TLS certificate that uses an
insecure cipher algorithm or is cryptographically weak.
Rationale:
This corresponds to Cert_Insecure in the
Connection_Status_Reason enum and to Insecure
in the TLS_Certificate_Reject_Reason enum.
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Cert.Invalid
org.freedesktop.Telepathy.Error.Cert.Invalid
Added in 0.19.11.
Raised if the server provided an SSL/TLS certificate that is
unacceptable in some way that does not have a more specific error.
Rationale:
This corresponds to Cert_Other_Error in the
Connection_Status_Reason enum and to Unknown
in the TLS_Certificate_Reject_Reason enum.
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Cert.Limit Exceeded
org.freedesktop.Telepathy.Error.Cert.LimitExceeded
Added in 0.19.11.
Raised if the length in bytes of the server certificate, or the depth of the
server certificate chain exceeds the limits imposed by the crypto
library.
Rationale:
This corresponds to Cert_Limit_Exceeded in the
Connection_Status_Reason enum and to Limit_Exceeded
in the TLS_Certificate_Reject_Reason enum.
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Cert.Not Activated
org.freedesktop.Telepathy.Error.Cert.NotActivated
Raised if the server provided an SSL/TLS certificate that will become
valid at some point in the future.
Rationale:
This corresponds to Cert_Not_Activated in the
Connection_Status_Reason enum and to
Not_Activated in the TLS_Certificate_Reject_Reason enum.
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Cert.Not Provided
org.freedesktop.Telepathy.Error.Cert.NotProvided
Raised if the server did not provide a SSL/TLS certificate. This error
MUST NOT be used to represent the absence of a client certificate
provided by the Telepathy connection manager.
Rationale:
This corresponds to Cert_Not_Provided in the
Connection_Status_Reason enum. That error
explicitly applied only to server SSL certificates, so this one
is similarly limited; having the CM present a client certificate
is a possible future feature, but it should have its own error
handling.
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Cert.Revoked
org.freedesktop.Telepathy.Error.Cert.Revoked
Raised if the server provided an SSL/TLS certificate that has been
revoked.
Rationale:
This corresponds to Cert_Revoked in the
Connection_Status_Reason enum and to Revoked
in the TLS_Certificate_Reject_Reason enum.
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Cert.Self Signed
org.freedesktop.Telepathy.Error.Cert.SelfSigned
Raised if the server provided an SSL/TLS certificate that is self-signed
and untrusted.
Rationale:
This corresponds to Cert_Self_Signed in the
Connection_Status_Reason enum and to Self_Signed
in the TLS_Certificate_Reject_Reason enum.
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Cert.Untrusted
org.freedesktop.Telepathy.Error.Cert.Untrusted
Raised if the server provided a SSL/TLS certificate signed by an
untrusted certifying authority. This error SHOULD NOT be used to
represent a self-signed certificate: see the Self Signed error for that.
Rationale:
This corresponds to Cert_Untrusted in the
Connection_Status_Reason enum and to Untrusted in the
TLS_Certificate_Reject_Reason enum, with a clarification
to avoid ambiguity.
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Channel.Banned
org.freedesktop.Telepathy.Error.Channel.Banned
You are banned from the channel.
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Channel.Invite Only
org.freedesktop.Telepathy.Error.Channel.InviteOnly
The requested channel is invite-only.
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Channel.Kicked
org.freedesktop.Telepathy.Error.Channel.Kicked
Used to represent a user being ejected from a channel by another user,
for instance being kicked from a chatroom.
Rationale:
This corresponds to Kicked in the
Channel_Group_Change_Reason enum.
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Connection Failed
org.freedesktop.Telepathy.Error.ConnectionFailed
Raised when a connection can't be established.
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Connection Lost
org.freedesktop.Telepathy.Error.ConnectionLost
Raised when a connection is broken.
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Connection Refused
org.freedesktop.Telepathy.Error.ConnectionRefused
Raised when a connection is refused.
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Connection Replaced
org.freedesktop.Telepathy.Error.ConnectionReplaced
Raised by an existing connection to an account if it is replaced by
a new connection (perhaps from another client or computer).
Rationale:
In MSNP, when connecting twice with the same Passport, the new
connection "wins" and the old one is automatically disconnected.
XMPP can also have this behaviour if the user chooses the same
resource in two clients (it is server-dependent whether the result is
AlreadyConnected on the new connection, ConnectionReplaced on the
old connection, or two successful connections).
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Disconnected
org.freedesktop.Telepathy.Error.Disconnected
The connection is not currently connected and cannot be used.
This error may also be raised when operations are performed on a
Connection for which
StatusChanged
has signalled status Disconnected for reason None.
Rationale:
The second usage corresponds to None in the
Connection_Status_Reason enum; if a better reason
is available, the corresponding error should be used instead.
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Does Not Exist
org.freedesktop.Telepathy.Error.DoesNotExist
Raised when the requested user does not, in fact, exist.
Rationale:
This corresponds to Invalid_Contact in the
Channel_Group_Change_Reason enum, but can also be
used to represent other things not existing (like chatrooms, perhaps).
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Encryption Error
org.freedesktop.Telepathy.Error.EncryptionError
Raised if encryption appears to be available, but could not actually be
used (for instance if SSL/TLS negotiation fails).
Rationale:
This corresponds to part of Encryption_Error in the
Connection_Status_Reason enum.
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Encryption Not Available
org.freedesktop.Telepathy.Error.EncryptionNotAvailable
Raised if a user request insisted that encryption should be used,
but encryption was not actually available.
Rationale:
This corresponds to part of Encryption_Error in the
Connection_Status_Reason enum. It's been separated
into a distinct error here because the two concepts that were part
of EncryptionError seem to be things that could reasonably appear
differently in the UI.
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Invalid Argument
org.freedesktop.Telepathy.Error.InvalidArgument
Raised when one of the provided arguments is invalid.
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Invalid Handle
org.freedesktop.Telepathy.Error.InvalidHandle
The handle specified is unknown on this channel or connection.
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Network Error
org.freedesktop.Telepathy.Error.NetworkError
Raised when there is an error reading from or writing to the network.
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No Answer
org.freedesktop.Telepathy.Error.NoAnswer
Used to represent a user being removed from a channel because they did
not respond, e.g. to a StreamedMedia call.
Rationale:
This corresponds to No_Answer in the
Channel_Group_Change_Reason enum.
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Not Available
org.freedesktop.Telepathy.Error.NotAvailable
Raised when the requested functionality is temporarily unavailable.
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Not Capable
org.freedesktop.Telepathy.Error.NotCapable
Raised when requested functionality is unavailable due to contact
not having required capabilities.
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Not Implemented
org.freedesktop.Telepathy.Error.NotImplemented
Raised when the requested method, channel, etc is not available on this connection.
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Not Yours
org.freedesktop.Telepathy.Error.NotYours
The requested channel or other resource already exists, and another user interface in this session is responsible for it.
User interfaces SHOULD handle this error unobtrusively, since it indicates that some other user interface is already processing the channel.
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Offline
org.freedesktop.Telepathy.Error.Offline
Raised when requested functionality is unavailable because a contact is
offline.
Rationale:
This corresponds to Offline in the
Channel_Group_Change_Reason enum.
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Permission Denied
org.freedesktop.Telepathy.Error.PermissionDenied
The user is not permitted to perform the requested operation.
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Registration Exists
org.freedesktop.Telepathy.Error.RegistrationExists
Raised during in-band registration if the server indicates that the
requested account already exists.
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Resource Unavailable
org.freedesktop.Telepathy.Error.ResourceUnavailable
Raised if a request cannot be satisfied because a process local to the
user has insufficient resources. Clients MAY try again
later.
Rationale:
For instance, the ChannelDispatcher
might raise this error for some or all channel requests if it has
detected that there is not enough free memory.
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Service Busy
org.freedesktop.Telepathy.Error.ServiceBusy
Raised if a server or some other piece of infrastructure cannot process
the request, e.g. due to resource limitations. Clients MAY try again
later.
Rationale:
This is not the same error as Busy, which indicates that a
user is busy.
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Terminated
org.freedesktop.Telepathy.Error.Terminated
Raised when a channel is terminated for an unspecified reason. In
particular, this error SHOULD be used whenever normal termination of
a 1-1 StreamedMedia call by the remote user is represented as a D-Bus
error name.
Rationale:
This corresponds to None in the
Channel_Group_Change_Reason enum.
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Would Break Anonymity
org.freedesktop.Telepathy.Error.WouldBreakAnonymity
Added in 0.19.7.
Raised if a request cannot be satisfied without violating an earlier
request for anonymity, and the earlier request specified that raising
an error is preferable to disclosing the user's identity (for instance
via Connection.Interface.Anonymity.AnonymityMandatory or
Channel.Interface.Anonymity.AnonymityMandatory).