* ServerMode:
Handle channel user modes 'a', 'h', and 'q' from remote servers
Handle unknown channel modes on server links
Handle unknown user modes on server links
IRC_MODE(), Client_Mode(): code cleanup [2/2]
Enlarge client user mode buffer, reduce client flags buffer
Infom clients when other servers change their user modes
IRC_MODE(), Client_Mode(): code cleanup [1/2]
These channel user modes aren't used for anything at the moment, but
ngIRCd knows that these three modes are "channel user modes" and not
"channel modes", that is that these modes take an "nick name" argument.
Like unknown user and channel modes, these modes are saved and forwarded,
but ignored otherwise.
We have to enlage our user mode buffer, so we can handle even unknown
user modes in the future; and reduce the client flags buffer, because
I can't imagine why we ever would need ~100 flags!?
Now we support up to 15 user modes (was: 8) and up to 15 flags (was: 99).
So in the end, we even save 99-15+8-15=77 bytes for each client structure!
Use ps(1) flag "-a" (as well as "-f"):
"Select all processes except both session leaders (see getsid(2)) and
processes not associated with a terminal."
Thanks to Götz Hoffart for reporting this problem!
On server-links, spoofed prefixes can happen because of the asynchronous
nature of the IRC protocol. So don't break server-links, only log a message
and ignore the command.
This fixes bug 113, see:
<https://arthur.barton.de/bugzilla/show_bug.cgi?id=113>
Citing an email from Florian to the ngIRCd mailing list:
"I wonder what the expected behaviour is when Conf_MorePrivacy is changed
from 'yes' to 'no' and the config is reloaded.
At the moment, WHOWAS will start giving out information on Users that
were connected during Conf_MorePrivacy=yes period. If this is not
wanted, Client_RegisterWhowas() should be changed to not store a record
when Conf_MorePrivacy is enabled."
And I think it is "not wanted" :-)
For outgoing connections, we use 2048 (DH_BITS) since commit 49b2d0e.
This patch enables ngIRCd to accept incoming connections from other servers
and clients that use at least 1024 bits (and no longer requires 2048 for
incoming connections, too).
Patch proposed by Florian Westphal.
this patch contains:
* Fix for Conf_CloakUserToNick to make it conceal user details
* Adds MorePrivacy-feature
MorePrivacy censors some user information from being reported by the
server. Signon time and idle time is censored. Part and quit messages
are made to look the same. WHOWAS requests are silently dropped. All
of this is useful if one wish to conceal users that access the ngircd
servers from TOR or I2P.
This patch makes it possible to scrub incomming CTCP commands from
other servers and clients alike. The ngircd oper can enable it from
the config file, by adding "ScrubCTCP = yes" under [OPTIONS]. It is
default off.
CTCP can be used to profile IRC users (get user clients name and
version, and also their IP addresses). This is not something we like
to happen when user pseudonymity/secrecy is important.
The server silently drops incomming CTCP requests from both other
servers and from users. The server that scrubs CTCP will not forward
the CTCP requests to other servers in the network either, which can
spell trouble if not every oper knows about the CTCP-scrubbing.
Scrubbing CTCP commands also means that it is not possible to send
files between users.
There is one exception to the CTCP scrubbing performed: ACTION ("/me
commands") requests are not scrubbed. ACTION is not dangerous to users
(unless they use OTR, which does not encrypt CTCP requests) and most
users would be confused if they were just dropped.
A CTCP request looks like this:
ctcp_char, COMMAND, arg0, arg1, arg2, .. argN, ctcp_char
ctcp_char is 0x01. (just like bold is 0x02 and color is 0x03.)
They are sent as part of a message and can be delivered to channels
and users alike.
The intention of this restructuring is to make the [Global] section much
cleaner, so that it only contains variables that most installations must
adjust to the local requirements.
All the optional variables are moved to [Limits], for configurable limits
and timers of ngIRCd, and [Options], for optional features.
The old variables in the [Global] section are deprecated now, but still
recognized.
The io_event_create error handling seems to miss a 'return'
statement.
Fix this by moving io_event_create() call around so we do not
need the Conn_Close/Init calls in the error case.
problem is that some clients refuse to connect to severs that only offer
1024. For interoperability it would be best to just use 4096, but that
takes minutes, even on current hardware.
parse.c:284: warning: suggest parentheses around operand of '!' or
change '&' to '&&' or '!' to '~'
The expression looks dubious, this should probably be
an if-not-set, then... test.
When the write buffer space grows too large, ngircd has to disconnect
the client to avoid wasting too much memory.
ngircd logs this with a scary 'write buffer overflow' message.
Change this to a more descriptive wording.
Not all servers (and services!) using the RFC1459 protocol style send
prefixes on all commands; so don't require them to do so.
This relaxes the requirements introduced by commit 15775e679.
We re-use the same helper function for both forward lookups
(when we want to connect to a peer server) and for validation of reverse
loopups (where we make a lookup on the hostname returned
by a reverse lookup on the IP address that connected).
Problem:
When ConnectIPv6=no, the forward lookup helper sets the adderss family
to AF_INET, and, if out client connected via ipv6, we fail to validate
the result.
Thus move the ConnectIPvX check out of the helper.
we do not need this for cryptographic purposes, but we can do better
than plain srandom(getpid()).
Also, keep in mind that rng state is inherited across fork(), so re-init
it in the child.
When enabled, this configuration option lets ngIRCd send a PING with an
numeric "token" to clients logging in; and it will not become registered
in the network until the client responds with the correct PONG.
This is used by QuakeNet for example (ircu/snircd), and looks like this:
NICK nick
:irc.example.net PING :1858979527
USER user . . :real name
PONG 1858979527
:irc.example.net 001 nick :Welcome to the Internet Relay Network ...
Make sure that all commands received from other servers do have
valid prefixes.
Only exceptions are PING and ERROR commands that can occure without
prefixes when generated by the remote peer itself.
* CloakUserHost:
Add a note not to use a percent sign ("%") in CloakHost variable
Rename ClientHost to CloakHost, and ClientUserNick to CloakUserToNick
Don't use "the.net" in sample-ngircd.conf, use "example.net"
ngircd.conf.5: document "ClientHost" and "ClientUserNick"
Move "ClientHost" and "ClientUserNick" to end of [Global] section
ClientUserNick setting
ClientHost setting
* QuitOnHTTP:
Only "handle" HTTP commands on unregistered connections
Don't use IRC_QUIT_HTTP() if STRICT_RFC is #define'd
IRC_QUIT_HTTP(): enhance error message
Move IRC_QUIT_HTTP() below IRC_QUIT()
quit on HTTP commands: GET & POST
* bug72-WHOIS-List:
Add "whois-test" to testsuite and distribution archive
Add support for up to 3 targets in WHOIS queries.
also allow up to one wildcard query from local hosts.
Follows ircd 2.10 implementation rather than RFC 2812.
At most 10 entries are returned per wildcard expansion.
WHOIS test cases by Dana Dahlstrom.
previously, any client could join in this configuration:
[Channel]
Name = #test
Modes = tnk
KeyFile = /tmp/foobar
fix this by checking for zero-length key before comparing
key to channel key.
This fixes the followin GCC warning on modern Linux systems as well:
irc-login.c: In function ‘Hello_User’:
irc-login.c:876: warning: ignoring return value of ‘write’,
declared with attribute warn_unused_result
This patch
- makes the server write buffer bigger: 64k,
- makes the regular write buffer bigger: 32k,
- tries to flush the write buffer starting at 4K.
Before this patch, a client got disconnected if the buffer flushing at 4k
failed, now regular clients can store up to 32k and servers up 64k even
if flushing is not possible at the moment (e.g. on slow links).
Don't do a NULL-pointer dereference when a remote server using the
IRC+ protocol sends an invalid PASS command without the required
<serverversion> parameter ...
Port number 0 marks remote servers that try to connect to this
daemon, but where this daemon never tries to establis a connection
on its own: only incoming connections are allowed.
Don't use isdigit() function any more, because it only checks the
first character of the variable value and because it doesn't know
about the minus sign which is required e.g. for "Group = -1".
The MOTD file is read in Read_Config(), so don't read it when handling
the "MotdFile" configuration variable. Instead make sure that it is
initialized properly when (re-)reading the configuration.
Fix commit 5a34bb203a:
It is not enough to strip the "No" prefix from "Ident" and "PAM",
but we have to introduce the new [Features] section to fix all
warning messages of ngIRCd.
Variables "Ident" and "PAM" in [Global] are completely wrong :-(
This enables other servers, services and IRC operators to change
channel topics, even when the client is not joined to this channel.
Now the handler for TOPIC behaves like the one for MODE.
Alexander Barton