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-rw-r--r--doc/Commands.txt282
-rw-r--r--src/ngircd/irc-channel.c230
-rw-r--r--src/ngircd/irc-mode.c105
-rw-r--r--src/ngircd/irc-oper.c39
-rw-r--r--src/ngircd/irc-server.c40
5 files changed, 406 insertions, 290 deletions
diff --git a/doc/Commands.txt b/doc/Commands.txt
index 7765d3a4..c43b50e3 100644
--- a/doc/Commands.txt
+++ b/doc/Commands.txt
@@ -97,8 +97,8 @@ Connection Handling Commands
 	clients using UTF-8, which should be the default today.
 
 	References:
-	 - <http://ngircd.barton.de/doc/Protocol.txt>
-	 - doc/Protocol.txt
+	 - IRC+, <http://ngircd.barton.de/doc/Protocol.txt>
+	 - IRC+, doc/Protocol.txt
 
 - NICK
 	NICK <nickname>
@@ -129,7 +129,8 @@ Connection Handling Commands
 	 - RFC 1459, 4.1.1 "Password message" (old client and server protocol)
 	 - RFC 2812, 3.1.1 "Password message" (client protocol)
 	 - RFC 2813, 4.1.1 "Password message" (server protocol)
-	 - doc/Protocol.txt
+	 - IRC+, <http://ngircd.barton.de/doc/Protocol.txt>
+	 - IRC+, doc/Protocol.txt
 
 - PING
 	PING <token> [<target>]
@@ -211,7 +212,8 @@ Connection Handling Commands
 	unauthorized clients to fake their identity; it is an arbitrary string.
 
 	References:
-	 - doc/Protocol.txt, II.4: "Update webchat/proxy client information"
+	 - IRC+, <http://ngircd.barton.de/doc/Protocol.txt>
+	 - IRC+, doc/Protocol.txt
 
 
 General Commands
@@ -225,6 +227,9 @@ General Commands
 	.
 	If <message> is omitted, the away status is removed.
 
+	References:
+	 - RFC 2812, 4.1 "Away"
+
 - HELP
 	HELP [<command>]
 	.
@@ -241,15 +246,46 @@ General Commands
 	ngIRCd replies using "NOTICE" commands like ircd 2.10/2.11; other
 	implementations are using numerics 704, 705, and 706.
 
-
 - MODE
-	MODE <nickname> <flags> (user)
-	MODE <channel> <flags> [<args>]
+	MODE <nickname> [{+|-}<mode>[<mode>] [{+|-}<mode>[<mode>] [...]]]
+	MODE <channel> [{+|-}<mode>[<mode>] [<arg> [<arg> [...]]] [{+|-}<mode>[<mode>] [<arg> [<arg> [...]]] [...]]]
+	.
+	Set and get user and channel modes.
+	.
+	When no mode parameters are given, the currently set user or channel
+	modes are returned. Otherwise the modes are adjusted accordingly
+	and the changes will be reported back to the client.
+	.
+	All user and chnnel "modes" are indicated by single case-sensitive
+	characters.
 	.
-	The MODE command is dual-purpose. It can be used to set both (user) and
-	<channel> modes.
+	Please note that a user can only get and set his own modes, and not
+	all user "levels" are allowed to change all channel modes ...
 	.
-	See doc/Modes.txt for more information.
+	The mode parameters can become quite complex, especially when dealing
+	with channel modes that require additional arguments:
+	.
+	  {+|-}<mode(s}>  -- set or unset one or more modes.
+	  +<mode(s)> -<mode(s)>  -- set some modes and unset others.
+	  +<modes> <arg1> <arg2>  -- set (at least) two modes with arguments.
+	.
+	Some examples:
+	.
+	  MODE nick +i  -- set user to "invisible".
+	  MODE #chan +tn  -- set "topic lock" and "no external messages".
+	  MODE #chan -t +l 50  -- remove "topic lock", set "user limit" to 50.
+	  MODE #chan +ov nick1 nick2  -- set "channel op" and "voice" mode
+	                                 to nick1 and nick2 in channel #chan.
+	.
+	A complete list of all modes supported by ngIRCd can be found online
+	here: <http://ngircd.barton.de/doc/Modes.txt>.
+
+	References:
+	 - RFC 2811, 4. "Channel Modes"
+	 - RFC 2812, 3.1.5 "User mode message"
+	 - RFC 2812, 3.2.3 "Channel mode message"
+	 - <http://ngircd.barton.de/doc/Modes.txt>
+	 - doc/Modes.txt
 
 - NOTICE
 	NOTICE <target>[,<target>[,...]] <message>
@@ -443,10 +479,19 @@ Status and Informational Commands
 	 - RFC 2812, 3.4.6 "Time message"
 
 - TRACE
-	TRACE [<server>]
+	TRACE [<target>]
+	.
+	Find the route to a specific server and send information about its
+	peers. Each server that processes this command reports back to the
+	sender about it: the replies from pass-through servers form a chain
+	which shows the route to the destination.
 	.
-	Trace a path across the IRC network of the current server, or if given
-	of a specific <server>, in a similar method to traceroute.
+	<target> can be a server name, the nickname of a client connected to
+	a specific server, or a mask matching a server name in the network.
+	The server of the current connection is used when <target> is omitted.
+
+	References:
+	 - RFC 2812, 3.4.8 "Trace message"
 
 - USERHOST
 	USERHOST <nickname> [<nickname> [...]]
@@ -539,13 +584,19 @@ Channel Commands
 	 - RFC 2812, 3.2.7 "Invite message"
 
 - JOIN
-	JOIN <channels> [<channel-keys>]
+	JOIN {<channel>[,<channel>[,...]] [<key>[,<key>[,...]]] | 0}
 	.
-	Makes the client join the <channels> (comma-separated list), specifying
-	the passwords, if needed, in the comma-separated <channel-keys> list.
-	A <channel-key> is only needed, if the <channel> mode "+k" is set.
+	Makes the client join the <channel> (comma-separated list), specifying
+	the channel keys ("passwords"). A <channel-key> is only needed if the
+	<channel> has the mode "+k" set.
 	.
 	If the channel(s) do not exist, then they will be created.
+	.
+	Using "JOIN 0" parts all channels at once.
+
+	References:
+	 - RFC 2812, 3.2.1 "Join message" (client protocol)
+	 - RFC 2813, 4.2.1 "Join message" (server protocol)
 
 - KICK
 	KICK <channel>[,<channel>[,...]] <nickname>[,<nickname>[,...]] [<reason>]
@@ -562,62 +613,99 @@ Channel Commands
 	 - RFC 2812, 3.2.8 "Kick command"
 
 - LIST
-	LIST [<channels> [<server>]]
+	LIST [<channel>[,<channel>[,...]] [<server>]]
+	.
+	List all visible <channels> (comma-seperated list).
 	.
-	List all visible <channels> (comma-seperated list) on the current
-	server.
 	If <server> is given, the command will be forwarded to <server> for
 	evaluation.
 
+	References:
+	 - RFC 2812, 3.2.6 "List message"
+
 - PART
-	PART <channels> [<part-message>]
+	PART <channel>[,<channel>[,...]] [<part-message>]
 	.
-	Leave <channels> (comma-separated list), optional with a
-	<part-message>.
+	Leave <channel> (comma-separated list), optionally with sending a
+	<part-message> to all the other channel members.
+
+	References:
+	 - RFC 2812, 3.2.2 "Part message"
 
 - TOPIC
-	TOPIC <channel> <topic>
+	TOPIC <channel> [<topic>]
 	.
-	Set a <topic> for <channel>.
+	Cchange or view the topic of a channel.
 	.
-	Only <channel> operators are able to set a <topic>.
+	The topic for channel <channel> is returned if there is no <topic>
+	given. If the <topic> parameter is present, the topic for that
+	channel will be changed, if this action is allowed for the user
+	requesting it. If the <topic> parameter is an empty string, the
+	topic for that channel will be removed.
+
+	References:
+	 - RFC 2812, 3.2.4 "Topic message"
 
 
 Administrative Commands
 ~~~~~~~~~~~~~~~~~~~~~~~
 
 - CONNECT
-	CONNECT <target server> [<port> [<remote server> [<mypwd> <peerpwd>]]]
+	CONNECT <server> [<port> [<remote-server> [<my-pwd> <peer-pwd>]]]
+	.
+	Instructs the current server, or <remote-server> if specified,
+	to connect to the server named <server>, which must be configured
+	in the server configuration file.
 	.
-	Instructs the current server, or <remote server> if specified,
-	to connect to <target server>.
+	To use this command, the user must be an IRC Operator. To establish
+	a connection on a <remote-server>, you must have remote IRC operator
+	privileges.
 	.
-	To connect <remote server> you need to have remote oper status.
-	If <port> is omitted, it uses the server port of the configuration.
-	If <mypwd> and <peerpwd> is given, it uses those passwords instead
-	of the ones in the configuration.
+	If <port>, <my-pwd> and <peer-pwd> are given, these values override
+	the ones specified in the server configuration file.
+
+	References:
+	 - RFC 2812, 3.4.7 "Connect message"
 
 - DIE
 	DIE
 	.
 	Instructs the server to shut down.
+	.
+	To use this command, the user must be an IRC Operator.
+
+	References:
+	 - RFC 2812, 4.3 "Die message"
 
 - DISCONNECT
-	DISCONNECT [<remote server>]
+	DISCONNECT <server>
 	.
-	Disconnects the current server, or <remote server> if specified.
-	To disconnect a <remote server> you need to have remote oper status.
+	Disconnect and disable a locally linked server.
+	.
+	To use this command, the user must be an IRC Operator.
+
+	References:
+	 - This command is not specified in the IRC RFCs, it is an extension
+	   of ngIRCd.
 
 - GLINE
-	GLINE <nick!user@hostmask> <seconds> :<reason>
+	GLINE <nick!user@hostmask> [<timeout> :<reason>]
+	.
+	This command provides timed G-Lines (network-wide bans).
 	.
-	This command provides timed G-Lines (Network-wide bans).
 	If a client matches a G-Line, it cannot connect to any server on
-	the IRC network. If you put 0 as <seconds>, it makes the G-Line
-	permanent.
+	the IRC network for <timeout> seconds. When <timoeut> is 0, it make
+	the G-Line permanent.
+	.
+	If no <timeout> and no <reason> is given, the G-Line is removed.
 	.
-	To remove a G-Line, type "GLINE <nick!user@hostmask>".
-	To list the G-Lines, type "STATS g".
+	To use this command, the user must be an IRC Operator.
+	.
+	"STATS g" can be used to list all currently active G-Lines.
+
+	References:
+	 - This command is not specified in the IRC RFCs, it is an extension
+	   of ngIRCd.
 
 - KILL
 	KILL <nickname> <reason>
@@ -627,40 +715,78 @@ Administrative Commands
 	.
 	This command is used internally between servers, too, for example
 	to disconnect duplicate <nickname>'s after a "net split".
+	.
+	To use this command, the user must be an IRC Operator.
 
 	References:
 	 - RFC 2812, 3.7.1 "Kill message"
 
 - KLINE
-	KLINE <nick!user@hostmask> <seconds> :<reason>
+	KLINE <nick!user@hostmask> [<timeout> :<reason>]
+	.
+	This command provides timed K-Lines (server-local bans).
 	.
-	This command provides timed K-Lines (Server-local bans).
-	If a client matches a K-Line, it cannot connect to the issued server.
-	If you put 0 as <seconds>, it makes the K-Line permanent.
+	If a client matches a K-Line, it cannot connect to this server for
+	<timeout> seconds. When <timoeut> is 0, it makes the K-Line permanent.
 	.
-	To remove a K-Line, type "KLINE <nick!user@hostmask>".
-	To list the K-Lines, type "STATS k".
+	If no <timeout> and no <reason> is given, the K-Line is removed.
+	.
+	To use this command, the user must be an IRC Operator.
+	.
+	"STATS k" can be used to list all currently active K-Lines.
+
+	References:
+	 - This command is not specified in the IRC RFCs, it is an extension
+	   of ngIRCd.
 
 - OPER
-	OPER <user> <password>
+	OPER <name> <password>
+	.
+	Authenticates a user named <name> as an IRC operator on the current
+	server/network.
+	.
+	This operator <name> must be configured in the server configuration.
 	.
-	Authenticates <user> as an IRC operator on the current server/network.
+	Please note that <name> is NOT related to a nickname at all!
+
+	References:
+	 - RFC 2812, 3.1.4 "Oper message"
 
 - REHASH
 	REHASH
 	.
 	Causes the server to re-read and re-process its configuration file(s).
+	.
+	While rehashing, no new connections are accepted, but all already
+	established connections stay connected.
+	.
+	To use this command, the user must be an IRC Operator.
+
+	References:
+	 - RFC 2812, 4.2 "Rehash message"
 
 - RESTART
 	RESTART
 	.
 	Restart the server.
+	.
+	While restarting, all connections are reset and no new connections
+	are accepted.
+	.
+	To use this command, the user must be an IRC Operator.
+
+	References:
+	 - RFC 2812, 4.4 "Restart message"
 
 - WALLOPS
 	WALLOPS <message>
 	.
 	Sends <message> to all users with user mode "+w".
+	.
+	To use this command, the user must be an IRC Operator.
 
+	References:
+	 - RFC 2812, 4.7 "Operwall message"
 
 IRC Service Commands
 ~~~~~~~~~~~~~~~~~~~~
@@ -740,7 +866,11 @@ Server Protocol Commands
 	CHANINFO is used by servers to inform each other about a channel:
 	its modes, channel key, user limits and its topic.
 	.
-	See doc/Protocol.txt for more information.
+	The CHANINFO command is allowed on server-links only.
+
+	References:
+	 - IRC+, <http://ngircd.barton.de/doc/Protocol.txt>
+	 - IRC+, doc/Protocol.txt
 
 - ERROR
 	ERROR [<message> [<> [...]]]
@@ -765,17 +895,49 @@ Server Protocol Commands
 	information of clients, like the hostname, the info text ("real name"),
 	or the user name.
 	.
-	See doc/Protocol.txt for more information.
+	The METADATA command is allowed on server-links only.
+
+	References:
+	 - IRC+, <http://ngircd.barton.de/doc/Protocol.txt>
+	 - IRC+, doc/Protocol.txt
 
 - NJOIN
+	NJOIN <channel> [<mode>]<nick>[,[<mode>]<nick>[,...]]
+	.
+	The NJOIN command is used on setver-links to add users with <nick>
+	and <mode> to a <channel> while peering.
+	.
+	The NJOIN command is allowed on server-links only.
+
+	References:
+	 - RFC 2813, 4.2.2 "Njoin message"
 
 - SERVER
+	SERVER <servername> <info>
+	SERVER <servername> <hopcount> <info>
+	SERVER <servername> <hopcount> <token> <info>
+	.
+	The first form registers the local connection as a new server in the
+	network, the second (RFC 1459) and third (RFC 2812) form announce a
+	new remote server in the network.
+	.
+	The SERVER command is allowed on unregistered or server-links only.
+
+	References:
+	 - RFC 1459, 4.1.4 "Server message"
+	 - RFC 2813, 4.1.2 "Server message"
 
 - SQUIT
-	SQUIT <server>
+	SQUIT <server> <comment>
 	.
 	Disconnects an IRC Server from the network.
+	.
+	This command is used on server-links, but can be used by IRC Operators
+	to forcefully disconnect servers from the network, too.
 
+	References:
+	 - RFC 2812, 3.1.8 "Squit"
+	 - RFC 2813, 4.1.6 "Server quit message"
 
 Dummy Commands
 ~~~~~~~~~~~~~~
@@ -804,5 +966,19 @@ Dummy Commands
 	 - RFC 2812, 4.6 "Users"
 
 - GET
+	GET [...]
+	.
+	Fake HTTP GET command. When received, the connection is shut down
+	immediately again to protect against crazy web browsers ...
+
+	References:
+	 - ngIRCd GIT commit 33e8c2480649
 
 - POST
+	POST [...]
+	.
+	Fake HTTP POST command. When received, the connection is shut down
+	immediately again to protect against crazy web browsers ...
+
+	References:
+	 - ngIRCd GIT commit 33e8c2480649
diff --git a/src/ngircd/irc-channel.c b/src/ngircd/irc-channel.c
index 41947a8a..c6836401 100644
--- a/src/ngircd/irc-channel.c
+++ b/src/ngircd/irc-channel.c
@@ -1,6 +1,6 @@
 /*
  * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2010 Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2013 Alexander Barton (alex@barton.de)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -33,13 +33,13 @@
 #include "parse.h"
 #include "irc.h"
 #include "irc-info.h"
+#include "irc-macros.h"
 #include "irc-write.h"
 #include "conf.h"
 
 #include "exp.h"
 #include "irc-channel.h"
 
-
 /**
  * Part from all channels.
  *
@@ -67,7 +67,6 @@ part_from_all_channels(CLIENT* client, CLIENT *target)
 	return CONNECTED;
 } /* part_from_all_channels */
 
-
 /**
  * Check weather a local client is allowed to join an already existing
  * channel or not.
@@ -149,7 +148,6 @@ join_allowed(CLIENT *Client, CHANNEL *chan, const char *channame,
 	return true;
 } /* join_allowed */
 
-
 /**
  * Set user channel modes.
  *
@@ -174,7 +172,6 @@ join_set_channelmodes(CHANNEL *chan, CLIENT *target, const char *flags)
 		Channel_UserModeAdd(chan, target, 'o');
 } /* join_set_channelmodes */
 
-
 /**
  * Forward JOIN command to a specific server
  *
@@ -211,7 +208,6 @@ cb_join_forward(CLIENT *To, CLIENT *Prefix, void *Data)
 					 Client_ID(Prefix));
 } /* cb_join_forward */
 
-
 /**
  * Forward JOIN command to all servers
  *
@@ -256,7 +252,6 @@ join_forward(CLIENT *Client, CLIENT *target, CHANNEL *chan,
 	}
 } /* join_forward */
 
-
 /**
  * Aknowledge user JOIN request and send "channel info" numerics.
  *
@@ -299,15 +294,12 @@ join_send_topic(CLIENT *Client, CLIENT *target, CHANNEL *chan,
 				  Channel_Name(chan));
 } /* join_send_topic */
 
-
 /**
  * Handler for the IRC "JOIN" command.
  *
- * See RFC 2812, 3.2.1 "Join message"; RFC 2813, 4.2.1 "Join message".
- *
- * @param Client The client from which this command has been received
- * @param Req Request structure with prefix and all parameters
- * @returns CONNECTED or DISCONNECTED
+ * @param Client The client from which this command has been received.
+ * @param Req Request structure with prefix and all parameters.
+ * @return CONNECTED or DISCONNECTED.
  */
 GLOBAL bool
 IRC_JOIN( CLIENT *Client, REQUEST *Req )
@@ -319,20 +311,9 @@ IRC_JOIN( CLIENT *Client, REQUEST *Req )
 	assert (Client != NULL);
 	assert (Req != NULL);
 
-	/* Bad number of arguments? */
-	if (Req->argc < 1 || Req->argc > 2)
-		return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
-					  Client_ID(Client), Req->command);
-
-	/* Who is the sender? */
-	if (Client_Type(Client) == CLIENT_SERVER)
-		target = Client_Search(Req->prefix);
-	else
-		target = Client;
-
-	if (!target)
-		return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
-					  Client_ID(Client), Req->prefix);
+	_IRC_ARGC_GE_OR_RETURN_(Client, Req, 1)
+	_IRC_ARGC_LE_OR_RETURN_(Client, Req, 2)
+	_IRC_GET_SENDER_OR_RETURN_(target, Req, Client)
 
 	/* Is argument "0"? */
 	if (Req->argc == 1 && !strncmp("0", Req->argv[0], 2))
@@ -443,15 +424,12 @@ IRC_JOIN( CLIENT *Client, REQUEST *Req )
 	return CONNECTED;
 } /* IRC_JOIN */
 
-
 /**
  * Handler for the IRC "PART" command.
  *
- * See RFC 2812, 3.2.2: "Part message".
- *
- * @param Client	The client from which this command has been received
- * @param Req		Request structure with prefix and all parameters
- * @returns		CONNECTED or DISCONNECTED
+ * @param Client The client from which this command has been received.
+ * @param Req Request structure with prefix and all parameters.
+ * @return CONNECTED or DISCONNECTED.
  */
 GLOBAL bool
 IRC_PART(CLIENT * Client, REQUEST * Req)
@@ -462,18 +440,9 @@ IRC_PART(CLIENT * Client, REQUEST * Req)
 	assert(Client != NULL);
 	assert(Req != NULL);
 
-	if (Req->argc < 1 || Req->argc > 2)
-		return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
-					  Client_ID(Client), Req->command);
-
-	/* Get the sender */
-	if (Client_Type(Client) == CLIENT_SERVER)
-		target = Client_Search(Req->prefix);
-	else
-		target = Client;
-	if (!target)
-		return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
-					  Client_ID(Client), Req->prefix);
+	_IRC_ARGC_GE_OR_RETURN_(Client, Req, 1)
+	_IRC_ARGC_LE_OR_RETURN_(Client, Req, 2)
+	_IRC_GET_SENDER_OR_RETURN_(target, Req, Client)
 
 	/* Loop over all the given channel names */
 	chan = strtok(Req->argv[0], ",");
@@ -496,15 +465,12 @@ IRC_PART(CLIENT * Client, REQUEST * Req)
 	return CONNECTED;
 } /* IRC_PART */
 
-
 /**
  * Handler for the IRC "TOPIC" command.
  *
- * See RFC 2812, 3.2.4 "Topic message".
- *
- * @param Client	The client from which this command has been received
- * @param Req		Request structure with prefix and all parameters
- * @returns		CONNECTED or DISCONNECTED
+ * @param Client The client from which this command has been received.
+ * @param Req Request structure with prefix and all parameters.
+ * @return CONNECTED or DISCONNECTED.
  */
 GLOBAL bool
 IRC_TOPIC( CLIENT *Client, REQUEST *Req )
@@ -517,18 +483,11 @@ IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 	assert( Client != NULL );
 	assert( Req != NULL );
 
-	if (Req->argc < 1 || Req->argc > 2)
-		return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
-					  Client_ID(Client), Req->command);
-
-	if (Client_Type(Client) == CLIENT_SERVER)
-		from = Client_Search(Req->prefix);
-	else
-		from = Client;
+	IRC_SetPenalty(Client, 1);
 
-	if (!from)
-		return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
-					  Client_ID(Client), Req->prefix);
+	_IRC_ARGC_GE_OR_RETURN_(Client, Req, 1)
+	_IRC_ARGC_LE_OR_RETURN_(Client, Req, 2)
+	_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 
 	chan = Channel_Search(Req->argv[0]);
 	if (!chan)
@@ -606,15 +565,9 @@ IRC_TOPIC( CLIENT *Client, REQUEST *Req )
 		return CONNECTED;
 } /* IRC_TOPIC */
 
-
 /**
  * Handler for the IRC "LIST" command.
  *
- * See RFC 2812, 3.2.6 "List message".
- *
- * This implementation handles the local case as well as the forwarding of the
- * LIST command to other servers in the IRC network.
- *
  * @param Client The client from which this command has been received.
  * @param Req Request structure with prefix and all parameters.
  * @return CONNECTED or DISCONNECTED.
@@ -630,26 +583,16 @@ IRC_LIST( CLIENT *Client, REQUEST *Req )
 	assert(Client != NULL);
 	assert(Req != NULL);
 
-	/* Bad number of prameters? */
-	if (Req->argc > 2)
-		return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
-					  Client_ID(Client), Req->command);
+	IRC_SetPenalty(Client, 2);
+
+	_IRC_ARGC_LE_OR_RETURN_(Client, Req, 2)
+	_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 
 	if (Req->argc > 0)
 		pattern = strtok(Req->argv[0], ",");
 	else
 		pattern = "*";
 
-	/* Get sender from prefix, if any */
-	if (Client_Type(Client) == CLIENT_SERVER)
-		from = Client_Search(Req->prefix);
-	else
-		from = Client;
-
-	if (!from)
-		return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
-					  Client_ID(Client), Req->prefix);
-
 	if (Req->argc == 2) {
 		/* Forward to other server? */
 		target = Client_Search(Req->argv[1]);
@@ -703,20 +646,15 @@ IRC_LIST( CLIENT *Client, REQUEST *Req )
 			pattern = NULL;
 	}
 
-	IRC_SetPenalty(from, 2);
 	return IRC_WriteStrClient(from, RPL_LISTEND_MSG, Client_ID(from));
 } /* IRC_LIST */
 
-
 /**
- * Handler for the IRC+ command "CHANINFO".
- *
- * See doc/Protocol.txt, section II.3:
- * "Exchange channel-modes, topics, and persistent channels".
+ * Handler for the IRC+ "CHANINFO" command.
  *
- * @param Client	The client from which this command has been received
- * @param Req		Request structure with prefix and all parameters
- * @returns		CONNECTED or DISCONNECTED
+ * @param Client The client from which this command has been received.
+ * @param Req Request structure with prefix and all parameters.
+ * @return CONNECTED or DISCONNECTED.
  */
 GLOBAL bool
 IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
@@ -735,68 +673,71 @@ IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 					  Client_ID(Client), Req->command);
 
 	/* Compatibility kludge */
-	if( Req->argc == 5 ) arg_topic = 4;
-	else if( Req->argc == 3 ) arg_topic = 2;
-	else arg_topic = -1;
+	if (Req->argc == 5)
+		arg_topic = 4;
+	else if(Req->argc == 3)
+		arg_topic = 2;
+	else
+		arg_topic = -1;
 
-	/* Search origin */
-	from = Client_Search( Req->prefix );
-	if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
+	_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
 
 	/* Search or create channel */
 	chan = Channel_Search( Req->argv[0] );
-	if( ! chan ) chan = Channel_Create( Req->argv[0] );
-	if( ! chan ) return CONNECTED;
-
-	if( Req->argv[1][0] == '+' )
-	{
-		ptr = Channel_Modes( chan );
-		if( ! *ptr )
-		{
-			/* OK, this channel doesn't have modes jet, set the received ones: */
-			Channel_SetModes( chan, &Req->argv[1][1] );
-
-			if( Req->argc == 5 )
-			{
-				if( strchr( Channel_Modes( chan ), 'k' )) Channel_SetKey( chan, Req->argv[2] );
-				if( strchr( Channel_Modes( chan ), 'l' )) Channel_SetMaxUsers( chan, atol( Req->argv[3] ));
-			}
-			else
-			{
+	if (!chan)
+		chan = Channel_Create( Req->argv[0] );
+	if (!chan)
+		return CONNECTED;
+
+	if (Req->argv[1][0] == '+') {
+		ptr = Channel_Modes(chan);
+		if (!*ptr) {
+			/* OK, this channel doesn't have modes jet,
+			 * set the received ones: */
+			Channel_SetModes(chan, &Req->argv[1][1]);
+
+			if(Req->argc == 5) {
+				if(strchr(Channel_Modes(chan), 'k'))
+					Channel_SetKey(chan, Req->argv[2]);
+				if(strchr(Channel_Modes(chan), 'l'))
+					Channel_SetMaxUsers(chan, atol(Req->argv[3]));
+			} else {
 				/* Delete modes which we never want to inherit */
-				Channel_ModeDel( chan, 'l' );
-				Channel_ModeDel( chan, 'k' );
+				Channel_ModeDel(chan, 'l');
+				Channel_ModeDel(chan, 'k');
 			}
 
-			strcpy( modes_add, "" );
-			ptr = Channel_Modes( chan );
-			while( *ptr )
-			{
-				if( *ptr == 'l' )
-				{
-					snprintf( l, sizeof( l ), " %lu", Channel_MaxUsers( chan ));
-					strlcat( modes_add, l, sizeof( modes_add ));
+			strcpy(modes_add, "");
+			ptr = Channel_Modes(chan);
+			while (*ptr) {
+				if (*ptr == 'l') {
+					snprintf(l, sizeof(l), " %lu",
+						 Channel_MaxUsers(chan));
+					strlcat(modes_add, l,
+						sizeof(modes_add));
 				}
-				if( *ptr == 'k' )
-				{
-					strlcat( modes_add, " ", sizeof( modes_add ));
-					strlcat( modes_add, Channel_Key( chan ), sizeof( modes_add ));
+				if (*ptr == 'k') {
+					strlcat(modes_add, " ",
+						sizeof(modes_add));
+					strlcat(modes_add, Channel_Key(chan),
+						sizeof(modes_add));
 				}
 	     			ptr++;
 			}
 
 			/* Inform members of this channel */
-			IRC_WriteStrChannelPrefix( Client, chan, from, false, "MODE %s +%s%s", Req->argv[0], Channel_Modes( chan ), modes_add );
+			IRC_WriteStrChannelPrefix(Client, chan, from, false,
+						  "MODE %s +%s%s", Req->argv[0],
+						  Channel_Modes(chan), modes_add);
 		}
 	}
-	else Log( LOG_WARNING, "CHANINFO: invalid MODE format ignored!" );
+	else
+		Log(LOG_WARNING, "CHANINFO: invalid MODE format ignored!");
 
-	if( arg_topic > 0 )
-	{
+	if (arg_topic > 0) {
 		/* We got a topic */
 		ptr = Channel_Topic( chan );
-		if(( ! *ptr ) && ( Req->argv[arg_topic][0] ))
-		{
+		if (!*ptr && Req->argv[arg_topic][0]) {
 			/* OK, there is no topic jet */
 			Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
 			IRC_WriteStrChannelPrefix(Client, chan, from, false,
@@ -805,12 +746,23 @@ IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
 	}
 
 	/* Forward CHANINFO to other serevrs */
-	if( Req->argc == 5 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2], Req->argv[3], Req->argv[4] );
-	else if( Req->argc == 3 ) IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s :%s", Req->argv[0], Req->argv[1], Req->argv[2] );
-	else IRC_WriteStrServersPrefixFlag( Client, from, 'C', "CHANINFO %s %s", Req->argv[0], Req->argv[1] );
+	if (Req->argc == 5)
+		IRC_WriteStrServersPrefixFlag(Client, from, 'C',
+					      "CHANINFO %s %s %s %s :%s",
+					      Req->argv[0], Req->argv[1],
+					      Req->argv[2], Req->argv[3],
+					      Req->argv[4]);
+	else if (Req->argc == 3)
+		IRC_WriteStrServersPrefixFlag(Client, from, 'C',
+					      "CHANINFO %s %s :%s",
+					      Req->argv[0], Req->argv[1],
+					      Req->argv[2]);
+	else
+		IRC_WriteStrServersPrefixFlag(Client, from, 'C',
+					      "CHANINFO %s %s",
+					      Req->argv[0], Req->argv[1]);
 
 	return CONNECTED;
 } /* IRC_CHANINFO */
 
-
 /* -eof- */
diff --git a/src/ngircd/irc-mode.c b/src/ngircd/irc-mode.c
index 765de394..a51369f0 100644
--- a/src/ngircd/irc-mode.c
+++ b/src/ngircd/irc-mode.c
@@ -1,6 +1,6 @@
 /*
  * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2012 Alexander Barton (alex@barton.de) and Contributors.
+ * Copyright (c)2001-2013 Alexander Barton (alex@barton.de) and Contributors.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -25,6 +25,7 @@
 #include "defines.h"
 #include "conn.h"
 #include "channel.h"
+#include "irc-macros.h"
 #include "irc-write.h"
 #include "lists.h"
 #include "log.h"
@@ -35,7 +36,6 @@
 #include "exp.h"
 #include "irc-mode.h"
 
-
 static bool Client_Mode PARAMS((CLIENT *Client, REQUEST *Req, CLIENT *Origin,
 				CLIENT *Target));
 static bool Channel_Mode PARAMS((CLIENT *Client, REQUEST *Req, CLIENT *Origin,
@@ -50,16 +50,15 @@ static bool Send_ListChange PARAMS((const bool IsAdd, const char ModeChar,
 				    CLIENT *Prefix, CLIENT *Client,
 				    CHANNEL *Channel, const char *Mask));
 
-
 /**
  * Handler for the IRC "MODE" command.
  *
- * See RFC 2812 section 3.1.5 ("user mode message") and section 3.2.3
- * ("channel mode message"), and RFC 2811 section 4 ("channel modes").
+ * This function detects whether user or channel modes should be modified
+ * and calls the apropriate sub-functions.
  *
- * @param Client	The client from which this command has been received.
- * @param Req		Request structure with prefix and all parameters.
- * @returns		CONNECTED or DISCONNECTED.
+ * @param Client The client from which this command has been received.
+ * @param Req Request structure with prefix and all parameters.
+ * @return CONNECTED or DISCONNECTED.
  */
 GLOBAL bool
 IRC_MODE( CLIENT *Client, REQUEST *Req )
@@ -70,20 +69,8 @@ IRC_MODE( CLIENT *Client, REQUEST *Req )
 	assert(Client != NULL);
 	assert(Req != NULL);
 
-	/* No parameters? */
-	if (Req->argc < 1)
-		return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
-					  Client_ID(Client), Req->command);
-
-	/* Origin for answers */
-	if (Client_Type(Client) == CLIENT_SERVER) {
-		origin = Client_Search(Req->prefix);
-		if (!origin)
-			return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
-						  Client_ID(Client),
-						  Req->prefix);
-	} else
-		origin = Client;
+	_IRC_ARGC_GE_OR_RETURN_(Client, Req, 1)
+	_IRC_GET_SENDER_OR_RETURN_(origin, Req, Client)
 
 	/* Channel or user mode? */
 	cl = NULL; chan = NULL;
@@ -102,7 +89,6 @@ IRC_MODE( CLIENT *Client, REQUEST *Req )
 			Client_ID(Client), Req->argv[0]);
 } /* IRC_MODE */
 
-
 /**
  * Check if the "mode limit" for a client has been reached.
  *
@@ -123,15 +109,14 @@ Mode_Limit_Reached(CLIENT *Client, int Count)
 	return true;
 }
 
-
 /**
  * Handle client mode requests
  *
- * @param Client	The client from which this command has been received.
- * @param Req		Request structure with prefix and all parameters.
- * @param Origin	The originator of the MODE command (prefix).
- * @param Target	The target (client) of this MODE command.
- * @returns		CONNECTED or DISCONNECTED.
+ * @param Client The client from which this command has been received.
+ * @param Req Request structure with prefix and all parameters.
+ * @param Origin The originator of the MODE command (prefix).
+ * @param Target The target (client) of this MODE command.
+ * @return CONNECTED or DISCONNECTED.
  */
 static bool
 Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target )
@@ -386,7 +371,13 @@ Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target )
 	return ok;
 } /* Client_Mode */
 
-
+/*
+ * Reply to a channel mode request.
+ *
+ * @param Origin The originator of the MODE command (prefix).
+ * @param Channel The channel of which the modes should be sent.
+ * @return CONNECTED or DISCONNECTED.
+ */
 static bool
 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 {
@@ -432,9 +423,14 @@ Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
 	return CONNECTED;
 }
 
-
 /**
  * Handle channel mode and channel-user mode changes
+ *
+ * @param Client The client from which this command has been received.
+ * @param Req Request structure with prefix and all parameters.
+ * @param Origin The originator of the MODE command (prefix).
+ * @param Channel The target channel of this MODE command.
+ * @return CONNECTED or DISCONNECTED.
  */
 static bool
 Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
@@ -941,31 +937,37 @@ Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
 	return connected;
 } /* Channel_Mode */
 
-
+/**
+ * Handler for the IRC "AWAY" command.
+ *
+ * @param Client The client from which this command has been received.
+ * @param Req Request structure with prefix and all parameters.
+ * @return CONNECTED or DISCONNECTED.
+ */
 GLOBAL bool
 IRC_AWAY( CLIENT *Client, REQUEST *Req )
 {
-	assert( Client != NULL );
-	assert( Req != NULL );
-
-	if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
-
-	if(( Req->argc == 1 ) && (Req->argv[0][0] ))
-	{
-		Client_SetAway( Client, Req->argv[0] );
-		Client_ModeAdd( Client, 'a' );
-		IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
-		return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
-	}
-	else
-	{
-		Client_ModeDel( Client, 'a' );
-		IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
-		return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
+	assert (Client != NULL);
+	assert (Req != NULL);
+
+	_IRC_ARGC_LE_OR_RETURN_(Client, Req, 1)
+
+	if (Req->argc == 1 && Req->argv[0][0]) {
+		Client_SetAway(Client, Req->argv[0]);
+		Client_ModeAdd(Client, 'a');
+		IRC_WriteStrServersPrefix(Client, Client, "MODE %s :+a",
+					  Client_ID( Client));
+		return IRC_WriteStrClient(Client, RPL_NOWAWAY_MSG,
+					  Client_ID( Client));
+	} else {
+		Client_ModeDel(Client, 'a');
+		IRC_WriteStrServersPrefix(Client, Client, "MODE %s :-a",
+					  Client_ID( Client));
+		return IRC_WriteStrClient(Client, RPL_UNAWAY_MSG,
+					  Client_ID( Client));
 	}
 } /* IRC_AWAY */
 
-
 /**
  * Add entries to channel invite, ban and exception lists.
  *
@@ -1032,7 +1034,6 @@ Add_To_List(char what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel,
 	return Send_ListChange(true, what, Prefix, Client, Channel, mask);
 }
 
-
 /**
  * Delete entries from channel invite, ban and exeption lists.
  *
@@ -1076,7 +1077,6 @@ Del_From_List(char what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel,
 	return Send_ListChange(false, what, Prefix, Client, Channel, mask);
 }
 
-
 /**
  * Send information about changed channel invite/ban/exception lists to clients.
  *
@@ -1114,5 +1114,4 @@ Send_ListChange(const bool IsAdd, const char ModeChar, CLIENT *Prefix,
 	return ok;
 } /* Send_ListChange */
 
-
 /* -eof- */
diff --git a/src/ngircd/irc-oper.c b/src/ngircd/irc-oper.c
index 237107f6..80b9f9a4 100644
--- a/src/ngircd/irc-oper.c
+++ b/src/ngircd/irc-oper.c
@@ -1,6 +1,6 @@
 /*
  * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2011 Alexander Barton (alex@barton.de) and Contributors.
+ * Copyright (c)2001-2013 Alexander Barton (alex@barton.de) and Contributors.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -28,6 +28,7 @@
 #include "conf.h"
 #include "channel.h"
 #include "class.h"
+#include "irc-macros.h"
 #include "irc-write.h"
 #include "log.h"
 #include "match.h"
@@ -55,8 +56,6 @@ Bad_OperPass(CLIENT *Client, char *errtoken, char *errmsg)
 /**
  * Handler for the IRC "OPER" command.
  *
- * See RFC 2812, 3.1.4 "Oper message".
- *
  * @param Client The client from which this command has been received.
  * @param Req Request structure with prefix and all parameters.
  * @return CONNECTED or DISCONNECTED.
@@ -70,9 +69,7 @@ IRC_OPER( CLIENT *Client, REQUEST *Req )
 	assert( Client != NULL );
 	assert( Req != NULL );
 
-	if (Req->argc != 2)
-		return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
-					  Client_ID(Client), Req->command);
+	_IRC_ARGC_EQ_OR_RETURN_(Client, Req, 2)
 
 	len = array_length(&Conf_Opers, sizeof(*op));
 	op = array_start(&Conf_Opers);
@@ -98,8 +95,8 @@ IRC_OPER( CLIENT *Client, REQUEST *Req )
 
 	if (!Client_OperByMe(Client))
 		Log(LOG_NOTICE|LOG_snotice,
-		    "Got valid OPER from \"%s\", user is an IRC operator now.",
-		    Client_Mask(Client));
+		    "Got valid OPER for \"%s\" from \"%s\", user is an IRC operator now.",
+		    Req->argv[0], Client_Mask(Client));
 
 	Client_SetOperByMe(Client, true);
 	return IRC_WriteStrClient(Client, RPL_YOUREOPER_MSG, Client_ID(Client));
@@ -108,8 +105,6 @@ IRC_OPER( CLIENT *Client, REQUEST *Req )
 /**
  * Handler for the IRC "DIE" command.
  *
- * See RFC 2812, 4.3 "Die message".
- *
  * @param Client The client from which this command has been received.
  * @param Req Request structure with prefix and all parameters.
  * @return CONNECTED or DISCONNECTED.
@@ -128,14 +123,11 @@ IRC_DIE(CLIENT * Client, REQUEST * Req)
 	if (!Op_Check(Client, Req))
 		return Op_NoPrivileges(Client, Req);
 
-	/* Bad number of parameters? */
 #ifdef STRICT_RFC
-	if (Req->argc != 0)
+	_IRC_ARGC_EQ_OR_RETURN_(Client, Req, 0)
 #else
-	if (Req->argc > 1)
+	_IRC_ARGC_LE_OR_RETURN_(Client, Req, 1)
 #endif
-		return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
-					  Client_ID(Client), Req->command);
 
 	/* Is a message given? */
 	if (Req->argc > 0) {
@@ -159,8 +151,6 @@ IRC_DIE(CLIENT * Client, REQUEST * Req)
 /**
  * Handler for the IRC "REHASH" command.
  *
- * See RFC 2812, 4.2 "Rehash message".
- *
  * @param Client The client from which this command has been received.
  * @param Req Request structure with prefix and all parameters.
  * @return CONNECTED or DISCONNECTED.
@@ -176,10 +166,7 @@ IRC_REHASH( CLIENT *Client, REQUEST *Req )
 	if (!Op_Check(Client, Req))
 		return Op_NoPrivileges(Client, Req);
 
-	/* Bad number of parameters? */
-	if (Req->argc != 0)
-		return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
-					  Client_ID(Client), Req->command );
+	_IRC_ARGC_EQ_OR_RETURN_(Client, Req, 0)
 
 	Log(LOG_NOTICE|LOG_snotice, "Got REHASH command from \"%s\" ...",
 	    Client_Mask(Client));
@@ -193,8 +180,6 @@ IRC_REHASH( CLIENT *Client, REQUEST *Req )
 /**
  * Handler for the IRC "RESTART" command.
  *
- * See RFC 2812, 4.4 "Restart message".
- *
  * @param Client The client from which this command has been received.
  * @param Req Request structure with prefix and all parameters.
  * @return CONNECTED or DISCONNECTED.
@@ -225,8 +210,6 @@ IRC_RESTART( CLIENT *Client, REQUEST *Req )
 /**
  * Handler for the IRC "CONNECT" command.
  *
- * See RFC 2812, 3.4.7 "Connect message".
- *
  * @param Client The client from which this command has been received.
  * @param Req Request structure with prefix and all parameters.
  * @return CONNECTED or DISCONNECTED.
@@ -377,8 +360,6 @@ IRC_DISCONNECT(CLIENT * Client, REQUEST * Req)
 /**
  * Handler for the IRC "WALLOPS" command.
  *
- * See RFC 2812, 4.7 "Operwall message".
- *
  * @param Client The client from which this command has been received.
  * @param Req Request structure with prefix and all parameters.
  * @return CONNECTED or DISCONNECTED.
@@ -391,9 +372,7 @@ IRC_WALLOPS( CLIENT *Client, REQUEST *Req )
 	assert( Client != NULL );
 	assert( Req != NULL );
 
-	if (Req->argc != 1)
-		return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
-					  Client_ID(Client), Req->command);
+	_IRC_ARGC_EQ_OR_RETURN_(Client, Req, 1)
 
 	switch (Client_Type(Client)) {
 	case CLIENT_USER:
diff --git a/src/ngircd/irc-server.c b/src/ngircd/irc-server.c
index 0a9e930d..a8b82c96 100644
--- a/src/ngircd/irc-server.c
+++ b/src/ngircd/irc-server.c
@@ -1,6 +1,6 @@
 /*
  * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2007 Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2013 Alexander Barton (alex@barton.de) and Contributors.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -29,7 +29,6 @@
 #include "conn-zip.h"
 #include "conf.h"
 #include "channel.h"
-#include "irc-write.h"
 #include "lists.h"
 #include "log.h"
 #include "messages.h"
@@ -37,15 +36,19 @@
 #include "numeric.h"
 #include "ngircd.h"
 #include "irc-info.h"
+#include "irc-macros.h"
+#include "irc-write.h"
 #include "op.h"
 
 #include "exp.h"
 #include "irc-server.h"
 
-
 /**
- * Handler for the IRC command "SERVER".
- * See RFC 2813 section 4.1.2.
+ * Handler for the IRC "SERVER" command.
+ *
+ * @param Client The client from which this command has been received.
+ * @param Req Request structure with prefix and all parameters.
+ * @return CONNECTED or DISCONNECTED.
  */
 GLOBAL bool
 IRC_SERVER( CLIENT *Client, REQUEST *Req )
@@ -214,7 +217,13 @@ IRC_SERVER( CLIENT *Client, REQUEST *Req )
 					  Client_ID(Client), Req->command);
 } /* IRC_SERVER */
 
-
+/*
+ * Handler for the IRC "NJOIN" command.
+ *
+ * @param Client The client from which this command has been received.
+ * @param Req Request structure with prefix and all parameters.
+ * @return CONNECTED or DISCONNECTED.
+ */
 GLOBAL bool
 IRC_NJOIN( CLIENT *Client, REQUEST *Req )
 {
@@ -226,7 +235,7 @@ IRC_NJOIN( CLIENT *Client, REQUEST *Req )
 	assert( Client != NULL );
 	assert( Req != NULL );
 
-	if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
+	_IRC_ARGC_EQ_OR_RETURN_(Client, Req, 2)
 
 	strlcpy( nick_in, Req->argv[1], sizeof( nick_in ));
 	strcpy( nick_out, "" );
@@ -288,15 +297,19 @@ IRC_NJOIN( CLIENT *Client, REQUEST *Req )
 	}
 
 	/* forward to other servers */
-	if( nick_out[0] != '\0' ) IRC_WriteStrServersPrefix( Client, Client_ThisServer( ), "NJOIN %s :%s", Req->argv[0], nick_out );
+	if (nick_out[0] != '\0')
+		IRC_WriteStrServersPrefix(Client, Client_ThisServer(),
+					  "NJOIN %s :%s", Req->argv[0], nick_out);
 
 	return CONNECTED;
 } /* IRC_NJOIN */
 
-
 /**
- * Handler for the IRC command "SQUIT".
- * See RFC 2813 section 4.1.2 and RFC 2812 section 3.1.8.
+ * Handler for the IRC "SQUIT" command.
+ *
+ * @param Client The client from which this command has been received.
+ * @param Req Request structure with prefix and all parameters.
+ * @return CONNECTED or DISCONNECTED.
  */
 GLOBAL bool
 IRC_SQUIT(CLIENT * Client, REQUEST * Req)
@@ -313,10 +326,7 @@ IRC_SQUIT(CLIENT * Client, REQUEST * Req)
 	    && !Client_HasMode(Client, 'o'))
 		return Op_NoPrivileges(Client, Req);
 
-	/* Bad number of arguments? */
-	if (Req->argc != 2)
-		return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
-					  Client_ID(Client), Req->command);
+	_IRC_ARGC_EQ_OR_RETURN_(Client, Req, 2)
 
 	if (Client_Type(Client) == CLIENT_SERVER && Req->prefix) {
 		from = Client_Search(Req->prefix);