This adds support for the WIP (at the time of this commit)
draft/chathistory extension, based on the draft at [1] and the
additional comments at [2].
This gets the history by parsing the chat logs, and is therefore only
enabled when the logs are enabled and the log path is configured.
Getting the history only from the logs adds some restrictions:
- we cannot get history by msgid (those are not logged)
- we cannot get the users masks (maybe they could be inferred from the
JOIN etc, but it is not worth the effort and would not work every
time)
The regular soju network history is not sent to clients that support
draft/chathistory, so that they can fetch what they need by manually
calling CHATHISTORY.
The only supported command is BEFORE for now, because that is the only
required command for an app that offers an "infinite history scrollback"
feature.
Regarding implementation, rather than reading the file from the end in
reverse, we simply start from the beginning of each log file, store each
PRIVMSG into a ring, then add the last lines of that ring into the
history we'll return later. The message parsing implementation must be
kept somewhat fast because an app could potentially request thousands of
messages in several files. Here we are using simple sscanf and indexOf
rather than regexps.
In case some log files do not contain any message (for example because
the user had not joined a channel at that time), we try up to a 100 days
of empty log files before giving up.
[1]: https://github.com/prawnsalad/ircv3-specifications/pull/3/files
[2]: https://github.com/ircv3/ircv3-specifications/pull/393/files#r350210018
Users can now specify multiple "listen" directives in their
configuration file. If -listen is specified on the CLI, it's added to
the list of listeners.
Listeners are now parsed as URLs. If the scheme is missing "ircs" is
assumed. URLs allow to enable/disable TLS on a per-listener basis and
will be used for Unix sockets too.
The default listening address is changed from irc+insecure://:6667 to
ircs://:6697. This avoids setting up an insecure listener opened to
everybody.
Go sets a default keep-alive interval of 15 seconds on all TCP
connections, if the platform supports it. See
net.ListenConfig.KeepAlive and net.Dialer.KeepAlive.
The user.updateNetwork function is a bit involved because we need to
make sure that the upstream connection is closed before re-connecting
(would otherwise cause "Nick already used" errors) and that the
downstream connections' state is kept in sync.
References: https://todo.sr.ht/~emersion/soju/17
Close the connection in conn.Close. This ensures the connection isn't
still alive after conn.Close, which would cause issues when
disconnecting and reconnecting quickly to an upstream server.
Previously, we did not skip the first RPL_INVITING parameter, which is
the user nick (like in all replies), which made the parsing for that
reply incorrect.
This fixes RPL_INVITING parsing by skipping the first parameter.
Previously we dropped all TAGMSG as well as any client message tag sent
from downstream.
This adds support for properly forwarding TAGMSG and client message tags
from downstreams and upstreams.
TAGMSG messages are intentionally not logged, because they are currently
typically used for +typing, which can generate a lot of traffic and is
only useful for a few seconds after it is sent.
This adds support for forwarding all errors and unknown messages labeled
with a specific downstream to that downstream.
Provided that the upstream supports labeled-response, users will now be
able to receive an error only on their client when making a command that
returns an error, as well as receiving any reply unknown to soju.
This is preparatory work for forwarding errors of downstream-initiated
messages to their sender, as well as any other unknown message.
Preivously, we only sent labels (for labeled-response) for specific
downstream messages, such as WHO, where we knew the reply should only be
sent to that specific downstream.
However, in the case of an error of a message that is not labeled, the
error reply is not be tagged with a downstream id label and we can't
forward it to a specific downstream. It is not a good solution either to
forward this error to all downstreams.
This adds labels to all downstream-initiated messages (provided the
upstream supports it).
Many IRC clients use the query `WHOIS nick nick` rather than
`WHOIS nick` when querying a nick. The former command means to
specifically query the WHOIS on the server to which `nick` is connected,
which is useful to get information that is sometimes not propagated
between servers, such as idle time.
In the case where a downstream sends WHOIS nick/network nick/network in
multi-server mode, we need to unmarshal both fields.
Previously, we did not unmarshal those fields, and upstreams would
receive `WHOIS nick/network nick`, which is incorrect.
This adds support for unmarshaling the target field if it is the same as
the mask field, by simply using the unmarshaled nick that is already
computed from the mask.
Sometimes, doing a LIST on a single upstream can be useful: if a user is
already connected to Rizon and freenode, sending a LIST will contain
tens of thousands of LIST replies that may not be useful if the user is
interested in another upstream.
This adds support for sending `LIST */network`, which follows the ELIST
M mask extension, that will only send LIST to that specific network. No
other masks are supported by this commit.
Users often have different nicks on different upstreams, and we should
support changing the user nick on a single upstream.
This adds support for a new trivial extension, `NICK nick/network`,
which will change the nick on the specified network, and do nothing for
the other networks.
Previously, the downstream nick was never changed, even when the
downstream sent a NICK message or was in single-server mode with a
different nick.
This adds support for updating the downstream nick in the following
cases:
- when a downstream sends NICK
- additionally, in single-server mode:
- when a downstream connects and its single network is connected
- when an upstream connects
- when an upstream sends NICK
When SASL is not used, we should only send CAP END after we send a CAP
REQ. Previously CAP END was sent both after a CAP REQ and a CAP ACK,
resulting in two CAP END messages.
Sending a CAP END right after the CAP REQ rather than waiting for the
CAP ACK/NAK saves 1 RTT.
Even though the memberships map has type map[string]*memberships
(with memberships being defined as []membership), the default value for
that map should not be `nil` but a pointer to a nil slice.
This fixes a segfault on some servers before user channel prefixes are
sent.
Previously, we only considered channel modes in the modes of a MODE
messages, which means channel membership changes were ignored. This
resulted in bugs where users channel memberships would not be properly
updated and cached with wrong values. Further, mode arguments
representing entities were not properly marshaled.
This adds support for correctly parsing and updating channel memberships
when processing MODE messages. Mode arguments corresponding to channel
memberships updates are now also properly marshaled.
MODE messages can't be easily sent from history because marshaling these
messages require knowing about the upstream available channel types and
channel membership types, which is currently only possible when
connected. For now this is not an issue since we do not send MODE
messages in history.
User channel memberships are actually a set of memberships, not a single
value. This introduces memberships, a type representing a set of
memberships, stored as an array of memberships ordered by descending
rank.
This also adds multi-prefix to the permanent downstream and upstream
capabilities, so that we try to get all possible channel memberships.
Channels can now be detached by leaving them with the reason "detach",
and re-attached by joining them again. Upon detaching the channel is
no longer forwarded to downstream connections. Upon re-attaching the
history buffer is sent.
This fixes a serious bug added in 276ce12e, where in newNetwork all
channels point to the same channel, which causes soju to only join a
single channel when connecting to an upstream network.
This also adds the same kind of reassignment of a for loop variable in
user.run(), even though that function currently works correctly, as a
sanity improvement in case this function is changed in the future.
Unfortunately, I don't think there's a good way to implement net.Conn
semantics on top of channels. The Close and SendMessage methods should
gracefully fail without panicking if the connection is already closed.
Using only channels leads to race conditions.
We could remove the lock if Close and SendMessage are only called from a
single goroutine. However that's not the case right now.
Closes: https://todo.sr.ht/~emersion/soju/55
This makes use of cap-notify to dynamically advertise support for
away-notify. away-notify is advertised to downstream connections if all
upstreams support it.
