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Commit Graph

867 Commits

Author SHA1 Message Date
Bram Matthys 08cb0fc05d Move crule to a module, so we can hot-patch if needed in the future.
This is a mandatory module to load, and included in modules.default.conf.

This also meant that the crule_test() etc efunctions are available
before running config test routines, so we now have a flag for
early efuncs. I guess we could consider doing that for all efuncs
though, so not sure if this flag is really needed.
2023-07-16 10:33:25 +02:00
Bram Matthys cdc14569a9 Warn on plaintext oper::password in conf and even go as far as
generating the password hashes and suggesting using those.

This also starts the initial work on set::best-practices
https://www.unrealircd.org/docs/Set_block#set::best-practices
with hashed-passwords as the first setting there.
2023-07-15 19:02:31 +02:00
Bram Matthys a153a2cce3 Change definition of parse_ban_action_config(), was too easy to leak memory.
Often you have default values for the config, and then a subsequent config
parsing run would overwrite the return value (= memory leak), merging/appending
would make no sense either, so it would force a free in all code before
calling us, well... let's just deal with it ourselves instead then ;)
2023-07-14 08:08:47 +02:00
Bram Matthys 4c3d2a6d6d Fix write bug in tkldb and add spamfilter::action stop.
The spamfilter::action stop ill prevent processing other spamfilters.
This would normally be a bit unusual, and potentially dangerous when you
do exclude things this way, but can be useful in some circumstances.

Stopping only affects the same type of spamfilters (general or central
spamfilters), so they don't interfere.

The tkldb write DB bug had to do with that it was processing
central spamfilters, which should be skipped just like config
based spamfilters were already skipped.
2023-07-11 14:32:11 +02:00
Bram Matthys f277880fb3 Add set::central-spamfilter::limit-ban-action and ::limit-ban-time
to limit actions to limit-ban-action as the highest, and limit
ban times to limit-ban-time the highest, see
https://www.unrealircd.org/docs/Central_Spamfilter

This also changes highest_spamfilter_action() to highest_ban_action().
2023-07-11 10:17:51 +02:00
Bram Matthys 95902979dc Central spamfilter: now every 1hr and a default set::central-spamfilter::except
policy is added. This may be tweaked later.
2023-07-10 20:18:07 +02:00
Bram Matthys 15b9255b0e Add spamfilter::except as an alternative for spamfilter::rule and upd rls notes 2023-07-10 12:12:25 +02:00
Bram Matthys c18c79e88b Add spamfilter hits and hits for exempted users.
* This means we always run spamfilters, even if users are exempts
* This way we can gather hits for exempted users on individual
  spamfilter entries, and possibly detect false positives
  (which relies on the assumption that those users are innocent)
* The hit counters are shown in in RPL_STATSSPAMF and also
  exposed via the JSON-RCP API.
* This commit also adds set::central-spamfilter::except but more
  on that later since i still want to set a default for that in
  a future commit.
* This also changes take_action() to take flags and adds the
  option TAKE_ACTION_SIMULATE_USER_ACTION which i intended to
  use but didn't in the end... not sure if i should keep it :D
2023-07-10 11:30:51 +02:00
Bram Matthys d25fdeb950 Some more BanAction fixes/improvements:
* stats S one thingy (multi-actions)
* STATS spamfilter (multi-actions)
* warn w/user target ('u') if using multi-actions
* moving some code
2023-07-09 16:27:40 +02:00
Bram Matthys 3250c7c0b4 Add some temporary safety mechanism if too many HTTP(S) requests in progress.
Will allow tweaking in config later. This is separate from rate-limit btw,
which also still needs to be done.
2023-07-09 13:21:16 +02:00
Bram Matthys dec9aa0341 Reporting spam to DroneBL now works, see https://www.unrealircd.org/docs/Spamreport_block
This uses the RPC2 API. Tested with staging.

Note that there are likely some bugs here or there, like memory leaks,
but the functionality is there.

Also still need to implement various stuff, including spamreport::rate-limit
2023-07-09 13:07:29 +02:00
Bram Matthys 5d65e4a400 Rename place_host_ban() to take_action() since it is not only about banning... 2023-07-08 19:54:40 +02:00
Bram Matthys 64f57ae243 Add spamfilter::action report (work in progress) 2023-07-08 19:24:15 +02:00
Bram Matthys 84786cc005 Add flags argument to buildvarstring_nvp, and add BUILDVARSTRING_URLENCODE
[skip ci]
2023-07-08 18:12:24 +02:00
Bram Matthys 38771b6761 Spamreport: implement POST requests 2023-07-08 16:46:21 +02:00
Bram Matthys def77c4d52 Initial work on spamreport { } block. Not really useful yet.
Early commit before i make it actually work and implement the rest
and hunting for memory leaks etc...
2023-07-08 15:35:08 +02:00
Bram Matthys 01dd042089 Add support for spamfilter::id (currently not used or displayed anywhere)
For config-file only atm.
2023-07-08 12:34:21 +02:00
Bram Matthys d1877ae100 Add conditional config defines:
UNREALIRCD_VERSION
UNREALIRCD_VERSION_GENERATION
UNREALIRCD_VERSION_MAJOR
UNREALIRCD_VERSION_MINOR
UNREALIRCD_VERSION_SUFFIX

https://www.unrealircd.org/docs/Defines_and_conditional_config
2023-07-07 21:05:38 +02:00
Bram Matthys 1006292681 Initial work on central spamfilter with auto refreshing URL / rules 2023-07-07 18:43:29 +02:00
Bram Matthys d998846c64 Support setting tags via spamfilter { } blocks 2023-07-06 18:25:43 +02:00
Bram Matthys 6bbcdfd1b3 Add spamfilter::rule (preconditions), add context to crule parser,
and add the first functions: online_time() and reputation().

The more interesting stuff will follow later...
2023-07-06 16:14:26 +02:00
Bram Matthys 656ea105da First go at multi actions... 2023-07-06 11:51:55 +02:00
Val Lorentz d5ceb664bc Add 'history_delete' method to HistoryBackend (#253)
This will allow modules to implement deletion of specific messages
(unlike history_destroy, which removes the entire history of a channel)
2023-06-17 16:10:10 +00:00
Bram Matthys 995d28cacb Add duplicate_security_group() function, and also:
unreal_duplicate_masks()
duplicate_nvplist()
duplicate_name_list()

And use this for when proxy::type is web, to duplicate the
exact criteria to the ban exception as mentioned in previous
commit.
2023-05-26 16:15:09 +02:00
Bram Matthys fa4b39d4aa Fix "function returns an aggregate" to make GCC happy.
Actually I don't think this was really wrong as this is an
enum, which is probably why clang does not complain...
but still... whatever....
2023-05-26 14:40:24 +02:00
Bram Matthys 9aafdb7f9c Move handling of webirc { } block into new proxy { } block (allow the old name)
This is untested, as I'm first working on the rest...
2023-05-26 12:23:51 +02:00
Bram Matthys c2d465c5dd Move chunk of code from start_of_normal_client_handshake() to
a function called start_dns_and_ident_lookup(). This can then
be easily called from other places as well, like the code k4be
did in src/modules/websocket.c to handle proxies.

Side-effect is that ident lookups would now be done, if we are
configured to do so, for forwarded webirc stuff (not that I
think many people use that feature at the moment...).
2023-05-26 11:24:01 +02:00
Bram Matthys 52472a9a88 Add support for set unknown-users { } and the like:
It is now possible to override some set settings per-security group by
having a set block with a name, like `set unknown-users { }`
* You could use this to set more limitations for unknown-users:
  ```
  set unknown-users {
          max-channels-per-user 5;
          static-quit "Quit";
          static-part yes;
  }
  ```
* Or to set higher values (higher than the normal set block)
  for trusted users:
  ```
  security-group trusted-bots {
          account { BotOne; BotTwo; }
  }
  set trusted-bots {
          max-channels-per-user 25;
  }
  ```
* Currently the following settings can be used in a set xxx { } block:
  set::auto-join, set::modes-on-connect, set::restrict-usermodes,
  set::max-channels-per-user, set::static-quit, set::static-part.
2023-05-22 12:07:43 +02:00
Bram Matthys 6bbb5dee37 Add str_starts_with* and str_ends_with* functions:
int str_starts_with_case_sensitive(const char *haystack, const char *needle);
int str_ends_with_case_sensitive(const char *haystack, const char *needle);
int str_starts_with_case_insensitive(const char *haystack, const char *needle);
int str_ends_with_case_insensitive(const char *haystack, const char *needle);
[skip ci]
2023-05-22 07:42:26 +02:00
Bram Matthys 3652940c2c Add set::anti-flood::<secgroup>::max-channels-per-user setting to override
the default set::max-channels-per-user (also called set::maxchannelsperuser).

This way you can give known-users a higher max-channels-per-user,
or even a special security group for trusted users (that you may
already have given a more lax flood setting and lower lag-penalty
etc. etc. so that fits in nicely)

And yeah this also:
* Makes it both in set and the anti-flood block accept both
  maxchannelsperuser and max-channels-per-user.
* Removes old MAXCHANNELS= in 005, as we already have CHANLIMIT=
This does not:
* Re-announce the 005 CHANLIMIT= if someone transitions from a security
  group with a different max-channels-per-user. We don't do that for
  IRCOps either, and I think no IRCd does that actually...
  To be honest i wonder if sending the limit in 005 is useful at all,
  do client really track this and limit their GUI based on it?? Doubt it!
2023-05-19 21:47:23 +02:00
Bram Matthys f2015ad865 Fix crash when removing a listen { } block with websocket or rpc
(or changing the port number). Reported by Nini.

Rather complex case: when the listen block is removed, obviously
the config hooks are not called for the (now non-existing) listen
block, and thus the websocket->request_handler and such are not
set to the new address of the websocket handler.
We now use a slightly silly workaround / new hook to fix this
corner case. Ideally there would be an extra layer in-between
like a handler lookup by name, or something like that.
(Or make the websocket module PERM but we don't want that!)
2023-05-19 19:29:46 +02:00
Bram Matthys f804c5ed65 Add detection and set the high connect rate to 1000 per seconds.
https://www.unrealircd.org/docs/FAQ#hi-conn-rate
This finishes https://bugs.unrealircd.org/view.php?id=5532
2023-05-18 13:15:17 +02:00
Bram Matthys 89075e532a Send throttling and some other error messages to SSL/TLS users (encrypted).
This is the start of "be more friendly to TLS users with disconnect
error messages" from https://bugs.unrealircd.org/view.php?id=5532

As that bug explains:
Consider doing the SSL/TLS handshake even for throttling errors and such
when the (reject) connection rate is below a certain amount per second.  If
it is higher than a certain rate, then fall back to the original behavior to
reject the user instantly without handshake or looking at any data.
Rationale: the current/original behavior is there so the ircd can handle
floods, both in terms of traffic and in terms of CPU usage (the SSL/TLS
handshake is quite costly after all).  The downside of the current behavior
is that TLS users don't see the error message, usually.  This feature
request tries to find a middle ground.

Still a TODO item:
* We don't detect high rates yet, so we only do this new behavior atm
  and not yet the old behavior during high connection rates.
* Verify that error messages/behavior hasn't changed (too) much,
  like the throttling and the banning disconnect messages.
2023-05-18 11:17:37 +02:00
Bram Matthys 40bdef6cd9 Make exceeds_maxperip() use a hash table (performance improvement) 2023-05-17 19:44:10 +02:00
Bram Matthys b19b70e876 Speed up invisibility checks for delayjoin mode (and when not used too).
This adds user_can_see_member_fast() which is used in at least 3 places
now, more places may follow later. It has extra paramters for membership
and membership modes that is very likely already looked up by the caller
(or if not, it is worth doing so by the caller).

This is work in progress so if everything crashes or people mysteriously
seem not present in channels (or the other way around) i would not be
surprised :D.
2023-05-15 16:58:51 +02:00
Bram Matthys d48ccb1ec8 When rpc.modules.default.conf is loaded, remember last 1000 lines of log
entries for a maximum of 7 days, in memory.
[skip ci]
2023-05-05 12:16:54 +02:00
Bram Matthys 1dcef57970 Add safe_json_decref() which sets pointer to NULL after decref. 2023-05-05 09:51:09 +02:00
Bram Matthys 2922a8ae5a Fix crash if there is a parse error in an included file and there are
other remote included files still being downloaded.
This issue exists both with and without cURL, so in both url interfaces.

Was finally able to reproduce this on my own machine. This bug exists
since at least 6.0.0 and perhaps even before that. Just doesn't get
triggered that often due to needing an error and a certain timing
condition (well, and ASan catches it, but on some systems it may
go unnoticed).
2023-04-22 14:08:29 +02:00
Val Lorentz ebcfe6a6bc Add sendtaggednumeric/sendtaggednumericfmt (#250)
They are similar to sendnumeric/sendnumericfmt, but allow an array of message
tags are parameter.

sendnumeric/sendnumericfmt are now shorthands for sendtaggednumeric/sendtaggednumericfmt
which pass NULL as mtags.
2023-04-15 14:34:38 +00:00
Bram Matthys 2184f38e7e Expose more WHOWAS fields in JSON-RPC and change add_history() to take a reason
for the add, like: nick-change, quit, server terminating. Add logon time.

I also think i will move from user.get_whowas to a whowas.XXX since the
returned object is not a user object and getting more different each commit :D.
2023-04-15 09:00:06 +02:00
Bram Matthys e7e2a5a275 whowasdb: write currently online users as well, as if they already
left. This so, if we die, there is still a history of them.
2023-04-15 08:17:54 +02:00
Bram Matthys 45201fffe7 New module 'whowasdb': persistent WHOWAS history (preserved between reboots) 2023-04-14 19:29:45 +02:00
Bram Matthys 66b8259234 JSON-RPC: don't do filtering on low ASCII like we do for JSON logging.
This way things like the TOPIC will keep their color codes if they have it.

Reported by armyn in https://bugs.unrealircd.org/view.php?id=6259

(And yeah i used a global to achieve this, otherwise it has too much
 of a cascading effect in XYZ functions)
2023-04-13 18:53:49 +02:00
Bram Matthys 7c22f37a9f JSON-RPC: add log.subscribe and log.unsubscribe
https://www.unrealircd.org/docs/JSON-RPC:Log
2023-04-08 17:56:59 +02:00
Bram Matthys 254afbb9c6 Make set::hide-ban-reason not affect opers (eg. show full gline reason).
Suggested by Chris_dc in https://bugs.unrealircd.org/view.php?id=6252

This uses unrealircd.org/real-quit-reason internally, but is only
exposed to servers, never to users. It results in using that quit
reason for IRCOps, while using the regular quit reason for normal users.
2023-04-05 07:26:12 +02:00
Bram Matthys 1e315bb953 Add and use command_issued_by_rpc() helper function for internal logging
of commands issued by JSON-RPC.
2023-04-02 16:04:17 +02:00
Bram Matthys 50c3ed2c24 Add unrealircd.org/issued-by if using RPC call channel.set_mode
This also changes the set_channel_mode() function to have
an extra arguments MessageTag *mtags (2nd parameter).
2023-04-02 12:06:52 +02:00
Bram Matthys a3c151a16a RPC: add rpc.set_issuer, eg set to logged in user on the admin panel.
This so UnrealIRCd knows who is issuing the commands.
This information is then passed on to unrealircd.org/issued-by and
is planned to be used by the logging system too.

https://www.unrealircd.org/docs/JSON-RPC:Rpc#rpc.set_issuer
2023-03-31 12:55:31 +02:00
Bram Matthys 5871bd9463 Initial work on unrealircd.org/issued-by message tag.
This will communicate the original issuer of a command.
For example an "SAMODE #test +s" results in a SAMODE coming from
:maintest.test.net MODE ....etc....
And with this feature, we will communicate the IRCOp who did it:
@unrealircd.org/issued-by=OPER:Syzop..etc....
This tag is only sent to servers and to IRCOps, not to ordinary users.

The plan is to support the following variants:
Services: unrealircd.org/issued-by=SERVICES:NickServ@services.test.net
IRCOp:    unrealircd.org/issued-by=OPER:Syzop@maintest.test.net:Operblock_name
JSON-RPC: unrealircd.org/issued-by=RPC:adminpanel@irc1.test.net:Adminpanel_Actual_User

This first commit only adds SERVICES and OPER in the handlers of the
SVSNICK and SAMODE commands. The JSON-RPC variant and all of the other
commands have not been done yet.
2023-03-31 12:17:54 +02:00
Bram Matthys 957af0909b RPC: channel.get and channel.list now have optional object_detail_level.
This is an integer which decides the amount of details in the response object.

For the channel.* calls the object_detail_level is one of:
0: only return the channel name, nothing else
1: basic channel information only
2: this adds bans, ban_exemptions, invite_exceptions
3: also show members, but only level/name/id
4: also show members, level/name/id/hostname/ip/details/geoip
5: also show members, level and full user details like user.get

When no object_detail_level is specified, the following defaults are used:
For channel.list the default is 1 (matches current 6.0.6 behavior)
For channel.get the default is 3 (matches current 6.0.6 behavior)

Using channel.list with object_detail_level=5 is forbidden because
it would cause way too much output (and processing time).
2023-03-27 09:56:03 +02:00