Esempio n. 1
0
File: client.c Progetto: kazcw/pande
/**
 * Return ID of a client with cloaked hostname: "client!user@server-name"
 *
 * This client ID is used for IRC prefixes, for example.
 * Please note that this function uses a global static buffer, so you can't
 * nest invocations without overwriting earlier results!
 * If the client has not enabled cloaking, the real hostname is used.
 *
 * @param Client Pointer to client structure
 * @return Pointer to global buffer containing the client ID
 */
GLOBAL char *
Client_MaskCloaked(CLIENT *Client)
{
	static char Mask_Buffer[GETID_LEN];

	assert (Client != NULL);

	/* Is the client using cloaking at all? */
	if (!Client_HasMode(Client, 'x'))
		return Client_Mask(Client);

	snprintf(Mask_Buffer, GETID_LEN, "%s!%s@%s", Client->id, Client->user,
		 Client_HostnameDisplayed(Client));

	return Mask_Buffer;
} /* Client_MaskCloaked */
Esempio n. 2
0
File: client.c Progetto: kazcw/pande
/**
 * Register client in My_Whowas structure for further recall by WHOWAS.
 * Note: Only clients that have been connected at least 30 seconds will be
 * registered to prevent automated IRC bots to "destroy" a nice server
 * history database.
 */
GLOBAL void
Client_RegisterWhowas( CLIENT *Client )
{
	int slot;
	time_t now;

	assert( Client != NULL );

	/* Don't register WHOWAS information when "MorePrivacy" is enabled. */
	if (Conf_MorePrivacy)
		return;

	now = time(NULL);
	/* Don't register clients that were connected less than 30 seconds. */
	if( now - Client->starttime < 30 )
		return;

	slot = Last_Whowas + 1;
	if( slot >= MAX_WHOWAS || slot < 0 ) slot = 0;

#ifdef DEBUG
	Log( LOG_DEBUG, "Saving WHOWAS information to slot %d ...", slot );
#endif

	My_Whowas[slot].time = now;
	strlcpy( My_Whowas[slot].id, Client_ID( Client ),
		 sizeof( My_Whowas[slot].id ));
	strlcpy( My_Whowas[slot].user, Client_User( Client ),
		 sizeof( My_Whowas[slot].user ));
	strlcpy( My_Whowas[slot].host, Client_HostnameDisplayed( Client ),
		 sizeof( My_Whowas[slot].host ));
	strlcpy( My_Whowas[slot].info, Client_Info( Client ),
		 sizeof( My_Whowas[slot].info ));
	strlcpy( My_Whowas[slot].server, Client_ID( Client_Introducer( Client )),
		 sizeof( My_Whowas[slot].server ));

	Last_Whowas = slot;
} /* Client_RegisterWhowas */
Esempio n. 3
0
/**
 * 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.
 * @return CONNECTED or DISCONNECTED.
 */
static bool
Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target )
{
	char the_modes[COMMAND_LEN], x[2], *mode_ptr;
	bool ok, set;
	bool send_RPL_HOSTHIDDEN_MSG = false;
	int mode_arg;
	size_t len;

	/* Is the client allowed to request or change the modes? */
	if (Client_Type(Client) == CLIENT_USER) {
		/* Users are only allowed to manipulate their own modes! */
		if (Target != Client)
			return IRC_WriteErrClient(Client,
						  ERR_USERSDONTMATCH_MSG,
						  Client_ID(Client));
	}

	/* Mode request: let's answer it :-) */
	if (Req->argc == 1)
		return IRC_WriteStrClient(Origin, RPL_UMODEIS_MSG,
					  Client_ID(Target),
					  Client_Modes(Target));

	mode_arg = 1;
	mode_ptr = Req->argv[mode_arg];

	/* Initial state: set or unset modes? */
	if (*mode_ptr == '+') {
		set = true;
		strcpy(the_modes, "+");
	} else if (*mode_ptr == '-') {
		set = false;
		strcpy(the_modes, "-");
	} else
		return IRC_WriteErrClient(Origin, ERR_UMODEUNKNOWNFLAG_MSG,
					  Client_ID(Origin));

	x[1] = '\0';
	ok = CONNECTED;
	while (mode_ptr) {
		mode_ptr++;
		if (!*mode_ptr) {
			/* Try next argument if there's any */
			mode_arg++;
			if (mode_arg < Req->argc)
				mode_ptr = Req->argv[mode_arg];
			else
				break;
		}

		switch(*mode_ptr) {
		  case '+':
		  case '-':
			if ((*mode_ptr == '+' && !set)
			    || (*mode_ptr == '-' && set)) {
				/* Action modifier ("+"/"-") must be changed */
				len = strlen(the_modes) - 1;
				if (the_modes[len] == '+'
				    || the_modes[len] == '-') {
					/* Last character in the "result
					 * string" was an "action", so just
					 * overwrite it with the new action */
					the_modes[len] = *mode_ptr;
				} else {
					/* Append new modifier character to
					 * the resulting mode string */
					x[0] = *mode_ptr;
					strlcat(the_modes, x,
						sizeof(the_modes));
				}
				if (*mode_ptr == '+')
					set = true;
				else
					set = false;
			}
			continue;
		}

		/* Validate modes */
		x[0] = '\0';
		switch (*mode_ptr) {
		case 'b': /* Block private msgs */
		case 'C': /* Only messages from clients sharing a channel */
		case 'i': /* Invisible */
		case 'I': /* Hide channel list from WHOIS */
		case 's': /* Server messages */
		case 'w': /* Wallops messages */
			x[0] = *mode_ptr;
			break;
		case 'a': /* Away */
			if (Client_Type(Client) == CLIENT_SERVER) {
				x[0] = 'a';
				Client_SetAway(Origin, DEFAULT_AWAY_MSG);
			} else
				ok = IRC_WriteErrClient(Origin,
							ERR_NOPRIVILEGES_MSG,
							Client_ID(Origin));
			break;
		case 'B': /* Bot */
			if (Client_HasMode(Client, 'r'))
				ok = IRC_WriteErrClient(Origin,
							ERR_RESTRICTED_MSG,
							Client_ID(Origin));
			else
				x[0] = 'B';
			break;
		case 'c': /* Receive connect notices */
		case 'q': /* KICK-protected user */
		case 'F': /* disable flood protection */
			  /* (only settable by IRC operators!) */
			if (!set || Client_Type(Client) == CLIENT_SERVER
			    || Client_HasMode(Origin, 'o'))
				x[0] = *mode_ptr;
			else
				ok = IRC_WriteErrClient(Origin,
							ERR_NOPRIVILEGES_MSG,
							Client_ID(Origin));
			break;
		case 'o': /* IRC operator (only unsettable!) */
			if (!set || Client_Type(Client) == CLIENT_SERVER) {
				x[0] = 'o';
			} else
				ok = IRC_WriteErrClient(Origin,
							ERR_NOPRIVILEGES_MSG,
							Client_ID(Origin));
			break;
		case 'r': /* Restricted (only settable) */
			if (set || Client_Type(Client) == CLIENT_SERVER)
				x[0] = 'r';
			else
				ok = IRC_WriteErrClient(Origin,
							ERR_RESTRICTED_MSG,
							Client_ID(Origin));
			break;
		case 'R': /* Registered (not [un]settable by clients) */
			if (Client_Type(Client) == CLIENT_SERVER)
				x[0] = 'R';
			else
				ok = IRC_WriteErrClient(Origin,
							ERR_NICKREGISTER_MSG,
							Client_ID(Origin));
			break;
		case 'x': /* Cloak hostname */
			if (Client_HasMode(Client, 'r'))
				ok = IRC_WriteErrClient(Origin,
							ERR_RESTRICTED_MSG,
							Client_ID(Origin));
			else if (!set || Conf_CloakHostModeX[0]
				 || Client_Type(Client) == CLIENT_SERVER
				 || Client_HasMode(Origin, 'o')) {
				x[0] = 'x';
				send_RPL_HOSTHIDDEN_MSG = true;
			} else
				ok = IRC_WriteErrClient(Origin,
							ERR_NOPRIVILEGES_MSG,
							Client_ID(Origin));
			break;
		default:
			if (Client_Type(Client) != CLIENT_SERVER) {
				Log(LOG_DEBUG,
				    "Unknown mode \"%c%c\" from \"%s\"!?",
				    set ? '+' : '-', *mode_ptr,
				    Client_ID(Origin));
				ok = IRC_WriteErrClient(Origin,
							ERR_UMODEUNKNOWNFLAG2_MSG,
							Client_ID(Origin),
							set ? '+' : '-',
							*mode_ptr);
				x[0] = '\0';
			} else {
				Log(LOG_DEBUG,
				    "Handling unknown mode \"%c%c\" from \"%s\" for \"%s\" ...",
				    set ? '+' : '-', *mode_ptr,
				    Client_ID(Origin), Client_ID(Target));
				x[0] = *mode_ptr;
			}
		}

		if (!ok)
			break;

		/* Is there a valid mode change? */
		if (!x[0])
			continue;

		if (set) {
			if (Client_ModeAdd(Target, x[0]))
				strlcat(the_modes, x, sizeof(the_modes));
		} else {
			if (Client_ModeDel(Target, x[0]))
				strlcat(the_modes, x, sizeof(the_modes));
		}
	}

	/* Are there changed modes? */
	if (the_modes[1]) {
		/* Remove needless action modifier characters */
		len = strlen(the_modes) - 1;
		if (the_modes[len] == '+' || the_modes[len] == '-')
			the_modes[len] = '\0';

		if (Client_Type(Client) == CLIENT_SERVER) {
			/* Forward modes to other servers */
			if (Client_Conn(Target) != NONE) {
				/* Remote server (service?) changed modes
				 * for one of our clients. Inform it! */
				IRC_WriteStrClientPrefix(Target, Origin,
							 "MODE %s :%s",
							 Client_ID(Target),
							 the_modes);
			}
			IRC_WriteStrServersPrefix(Client, Origin,
						  "MODE %s :%s",
						  Client_ID(Target),
						  the_modes);
		} else {
			/* Send reply to client and inform other servers */
			ok = IRC_WriteStrClientPrefix(Client, Origin,
						      "MODE %s :%s",
						      Client_ID(Target),
						      the_modes);
			IRC_WriteStrServersPrefix(Client, Origin,
						  "MODE %s :%s",
						  Client_ID(Target),
						  the_modes);
		}

		if (send_RPL_HOSTHIDDEN_MSG && Client_Conn(Target) > NONE) {
			/* A new (cloaked) hostname must be announced */
			IRC_WriteStrClientPrefix(Target, Origin,
						 RPL_HOSTHIDDEN_MSG,
						 Client_ID(Target),
						 Client_HostnameDisplayed(Target));

		}

		LogDebug("%s \"%s\": Mode change, now \"%s\".",
			 Client_TypeText(Target), Client_Mask(Target),
			 Client_Modes(Target));
	}

	return ok;
} /* Client_Mode */
Esempio n. 4
0
File: irc.c Progetto: ngircd/ngircd
/**
 * Get pointer to a static string representing the connection "options".
 *
 * @param Idx Connection index.
 * @return Pointer to static (global) string buffer.
 */
static char *
#if defined(SSL_SUPPORT) || defined(ZLIB)
Option_String(CONN_ID Idx)
{
	static char option_txt[8];
	UINT16 options;

	assert(Idx != NONE);

	options = Conn_Options(Idx);
	strcpy(option_txt, "F");	/* No idea what this means, but the
					 * original ircd sends it ... */
#ifdef SSL_SUPPORT
	if(options & CONN_SSL)		/* SSL encrypted link */
		strlcat(option_txt, "s", sizeof(option_txt));
#endif
#ifdef ZLIB
	if(options & CONN_ZIP)		/* zlib compression enabled */
		strlcat(option_txt, "z", sizeof(option_txt));
#endif

	return option_txt;
#else
Option_String(UNUSED CONN_ID Idx)
{
	return "";
#endif
} /* Option_String */

/**
 * Send a message to target(s).
 *
 * This function is used by IRC_{PRIVMSG|NOTICE|SQUERY} to actualy
 * send the message(s).
 *
 * @param Client The client from which this command has been received.
 * @param Req Request structure with prefix and all parameters.
 * @param ForceType Required type of the destination of the message(s).
 * @param SendErrors Whether to report errors back to the client or not.
 * @return CONNECTED or DISCONNECTED.
 */
static bool
Send_Message(CLIENT * Client, REQUEST * Req, int ForceType, bool SendErrors)
{
	CLIENT *cl, *from;
	CL2CHAN *cl2chan;
	CHANNEL *chan;
	char *currentTarget = Req->argv[0];
	char *strtok_last = NULL;
	char *message = NULL;
	char *targets[MAX_HNDL_TARGETS];
	int i, target_nr = 0;

	assert(Client != NULL);
	assert(Req != NULL);

	if (Req->argc == 0) {
		if (!SendErrors)
			return CONNECTED;
		return IRC_WriteErrClient(Client, ERR_NORECIPIENT_MSG,
					  Client_ID(Client), Req->command);
	}
	if (Req->argc == 1) {
		if (!SendErrors)
			return CONNECTED;
		return IRC_WriteErrClient(Client, ERR_NOTEXTTOSEND_MSG,
					  Client_ID(Client));
	}
	if (Req->argc > 2) {
		if (!SendErrors)
			return CONNECTED;
		return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
					  Client_ID(Client), Req->command);
	}

	if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
		from = Client_Search(Req->prefix);
	else
		from = Client;
	if (!from)
		return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
					  Client_ID(Client), Req->prefix);

#ifdef ICONV
	if (Client_Conn(Client) > NONE)
		message = Conn_EncodingFrom(Client_Conn(Client), Req->argv[1]);
	else
#endif
		message = Req->argv[1];

	/* handle msgtarget = msgto *("," msgto) */
	currentTarget = strtok_r(currentTarget, ",", &strtok_last);
	ngt_UpperStr(Req->command);

	/* Please note that "currentTarget" is NULL when the target contains
	 * the separator character only, e. g. "," or ",,,," etc.! */
	while (currentTarget) {
		/* Make sure that there hasn't been such a target already: */
		targets[target_nr++] = currentTarget;
		for(i = 0; i < target_nr - 1; i++) {
			if (strcasecmp(currentTarget, targets[i]) == 0)
				goto send_next_target;
		}

		/* Check for and handle valid <msgto> of form:
		 * RFC 2812 2.3.1:
		 *   msgto =  channel / ( user [ "%" host ] "@" servername )
		 *   msgto =/ ( user "%" host ) / targetmask
		 *   msgto =/ nickname / ( nickname "!" user "@" host )
		 */
		if (strchr(currentTarget, '!') == NULL)
			/* nickname */
			cl = Client_Search(currentTarget);
		else
			cl = NULL;

		if (cl == NULL) {
			/* If currentTarget isn't a nickname check for:
			 * user ["%" host] "@" servername
			 * user "%" host
			 * nickname "!" user "@" host
			 */
			char target[COMMAND_LEN];
			char * nick = NULL;
			char * user = NULL;
			char * host = NULL;
			char * server = NULL;

			strlcpy(target, currentTarget, COMMAND_LEN);
			server = strchr(target, '@');
			if (server) {
				*server = '\0';
				server++;
			}
			host = strchr(target, '%');
			if (host) {
				*host = '\0';
				host++;
			}
			user = strchr(target, '!');
			if (user) {
				/* msgto form: nick!user@host */
				*user = '******';
				user++;
				nick = target;
				host = server; /* not "@server" but "@host" */
			} else {
				user = target;
			}

			for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
				if (Client_Type(cl) != CLIENT_USER &&
				    Client_Type(cl) != CLIENT_SERVICE)
					continue;
				if (nick != NULL && host != NULL) {
					if (strcasecmp(nick, Client_ID(cl)) == 0 &&
					    strcasecmp(user, Client_User(cl)) == 0 &&
					    strcasecmp(host, Client_HostnameDisplayed(cl)) == 0)
						break;
					else
						continue;
				}
				if (strcasecmp(user, Client_User(cl)) != 0)
					continue;
				if (host != NULL && strcasecmp(host,
						Client_HostnameDisplayed(cl)) != 0)
					continue;
				if (server != NULL && strcasecmp(server,
						Client_ID(Client_Introducer(cl))) != 0)
					continue;
				break;
			}
		}

		if (cl) {
			/* Target is a user, enforce type */
#ifndef STRICT_RFC
			if (Client_Type(cl) != ForceType &&
			    !(ForceType == CLIENT_USER &&
			      (Client_Type(cl) == CLIENT_USER ||
			       Client_Type(cl) == CLIENT_SERVICE))) {
#else
			if (Client_Type(cl) != ForceType) {
#endif
				if (SendErrors && !IRC_WriteErrClient(
				    from, ERR_NOSUCHNICK_MSG,Client_ID(from),
				    currentTarget))
					return DISCONNECTED;
				goto send_next_target;
			}

#ifndef STRICT_RFC
			if (ForceType == CLIENT_SERVICE &&
			    (Conn_Options(Client_Conn(Client_NextHop(cl)))
			     & CONN_RFC1459)) {
				/* SQUERY command but RFC 1459 link: convert
				 * request to PRIVMSG command */
				Req->command = "PRIVMSG";
			}
#endif
			if (Client_HasMode(cl, 'b') &&
			    !Client_HasMode(from, 'R') &&
			    !Client_HasMode(from, 'o') &&
			    !(Client_Type(from) == CLIENT_SERVER) &&
			    !(Client_Type(from) == CLIENT_SERVICE)) {
				if (SendErrors && !IRC_WriteErrClient(from,
						ERR_NONONREG_MSG,
						Client_ID(from), Client_ID(cl)))
					return DISCONNECTED;
				goto send_next_target;
			}

			if (Client_HasMode(cl, 'C') &&
			    !Client_HasMode(from, 'o') &&
			    !(Client_Type(from) == CLIENT_SERVER) &&
			    !(Client_Type(from) == CLIENT_SERVICE)) {
				cl2chan = Channel_FirstChannelOf(cl);
				while (cl2chan) {
					chan = Channel_GetChannel(cl2chan);
					if (Channel_IsMemberOf(chan, from))
						break;
					cl2chan = Channel_NextChannelOf(cl, cl2chan);
				}
				if (!cl2chan) {
					if (SendErrors && !IRC_WriteErrClient(
					    from, ERR_NOTONSAMECHANNEL_MSG,
					    Client_ID(from), Client_ID(cl)))
						return DISCONNECTED;
					goto send_next_target;
				}
			}

			if (SendErrors && (Client_Type(Client) != CLIENT_SERVER)
			    && Client_HasMode(cl, 'a')) {
				/* Target is away */
				if (!IRC_WriteStrClient(from, RPL_AWAY_MSG,
							Client_ID(from),
							Client_ID(cl),
							Client_Away(cl)))
					return DISCONNECTED;
			}
			if (Client_Conn(from) > NONE) {
				Conn_UpdateIdle(Client_Conn(from));
			}
			if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
						      Req->command, Client_ID(cl),
						      message))
				return DISCONNECTED;
		} else if (ForceType != CLIENT_SERVICE
			   && (chan = Channel_Search(currentTarget))) {
			/* Target is a channel */
			if (!Channel_Write(chan, from, Client, Req->command,
					   SendErrors, message))
					return DISCONNECTED;
		} else if (ForceType != CLIENT_SERVICE
			   && strchr("$#", currentTarget[0])
			   && strchr(currentTarget, '.')) {
			/* $#: server/host mask, RFC 2812, sec. 3.3.1 */
			if (!Send_Message_Mask(from, Req->command, currentTarget,
					       message, SendErrors))
				return DISCONNECTED;
		} else {
			if (!SendErrors)
				return CONNECTED;
			if (!IRC_WriteErrClient(from, ERR_NOSUCHNICK_MSG,
						Client_ID(from), currentTarget))
				return DISCONNECTED;
		}

	send_next_target:
		currentTarget = strtok_r(NULL, ",", &strtok_last);
		if (!currentTarget)
			break;

		Conn_SetPenalty(Client_Conn(Client), 1);

		if (target_nr >= MAX_HNDL_TARGETS) {
			/* Too many targets given! */
			return IRC_WriteErrClient(Client,
						  ERR_TOOMANYTARGETS_MSG,
						  currentTarget);
		}
	}

	return CONNECTED;
} /* Send_Message */

/**
 * Send a message to "target mask" target(s).
 *
 * See RFC 2812, sec. 3.3.1 for details.
 *
 * @param from The client from which this command has been received.
 * @param command The command to use (PRIVMSG, NOTICE, ...).
 * @param targetMask The "target mask" (will be verified by this function).
 * @param message The message to send.
 * @param SendErrors Whether to report errors back to the client or not.
 * @return CONNECTED or DISCONNECTED.
 */
static bool
Send_Message_Mask(CLIENT * from, char * command, char * targetMask,
		  char * message, bool SendErrors)
{
	CLIENT *cl;
	bool client_match;
	char *mask = targetMask + 1;
	const char *check_wildcards;

	cl = NULL;

	if (!Client_HasMode(from, 'o')) {
		if (!SendErrors)
			return true;
		return IRC_WriteErrClient(from, ERR_NOPRIVILEGES_MSG,
					  Client_ID(from));
	}

	/*
	 * RFC 2812, sec. 3.3.1 requires that targetMask have at least one
	 * dot (".") and no wildcards ("*", "?") following the last one.
	 */
	check_wildcards = strrchr(targetMask, '.');
	if (!check_wildcards || check_wildcards[strcspn(check_wildcards, "*?")]) {
		if (!SendErrors)
			return true;
		return IRC_WriteErrClient(from, ERR_WILDTOPLEVEL_MSG,
					  targetMask);
	}

	if (targetMask[0] == '#') {
		/* #: hostmask, see RFC 2812, sec. 3.3.1 */
		for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
			if (Client_Type(cl) != CLIENT_USER)
				continue;
			client_match = MatchCaseInsensitive(mask, Client_Hostname(cl));
			if (client_match)
				if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
						command, Client_ID(cl), message))
					return false;
		}
	} else {
		/* $: server mask, see RFC 2812, sec. 3.3.1 */
		assert(targetMask[0] == '$');
		for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
			if (Client_Type(cl) != CLIENT_USER)
				continue;
			client_match = MatchCaseInsensitive(mask,
					Client_ID(Client_Introducer(cl)));
			if (client_match)
				if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
						command, Client_ID(cl), message))
					return false;
		}
	}
	return CONNECTED;
} /* Send_Message_Mask */
Esempio n. 5
0
static bool
Send_Message(CLIENT * Client, REQUEST * Req, int ForceType, bool SendErrors)
{
	CLIENT *cl, *from;
	CL2CHAN *cl2chan;
	CHANNEL *chan;
	char *currentTarget = Req->argv[0];
	char *lastCurrentTarget = NULL;
	char *message = NULL;

	assert(Client != NULL);
	assert(Req != NULL);

	if (Req->argc == 0) {
		if (!SendErrors)
			return CONNECTED;
		return IRC_WriteErrClient(Client, ERR_NORECIPIENT_MSG,
					  Client_ID(Client), Req->command);
	}
	if (Req->argc == 1) {
		if (!SendErrors)
			return CONNECTED;
		return IRC_WriteErrClient(Client, ERR_NOTEXTTOSEND_MSG,
					  Client_ID(Client));
	}
	if (Req->argc > 2) {
		if (!SendErrors)
			return CONNECTED;
		IRC_SetPenalty(Client, 2);
		return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
					  Client_ID(Client), Req->command);
	}

	if (Client_Type(Client) == CLIENT_SERVER)
		from = Client_Search(Req->prefix);
	else
		from = Client;
	if (!from)
		return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
					  Client_ID(Client), Req->prefix);

#ifdef ICONV
	if (Client_Conn(Client) > NONE)
		message = Conn_EncodingFrom(Client_Conn(Client), Req->argv[1]);
	else
#endif
		message = Req->argv[1];

	/* handle msgtarget = msgto *("," msgto) */
	currentTarget = strtok_r(currentTarget, ",", &lastCurrentTarget);
	ngt_UpperStr(Req->command);

	while (currentTarget) {
		/* Check for and handle valid <msgto> of form:
		 * RFC 2812 2.3.1:
		 *   msgto =  channel / ( user [ "%" host ] "@" servername )
		 *   msgto =/ ( user "%" host ) / targetmask
		 *   msgto =/ nickname / ( nickname "!" user "@" host )
		 */
		if (strchr(currentTarget, '!') == NULL)
			/* nickname */
			cl = Client_Search(currentTarget);
		else
			cl = NULL;

		if (cl == NULL) {
			/* If currentTarget isn't a nickname check for:
			 * user ["%" host] "@" servername
			 * user "%" host
			 * nickname "!" user "@" host
			 */
			char target[COMMAND_LEN];
			char * nick = NULL;
			char * user = NULL;
			char * host = NULL;
			char * server = NULL;

			strlcpy(target, currentTarget, COMMAND_LEN);
			server = strchr(target, '@');
			if (server) {
				*server = '\0';
				server++;
			}
			host = strchr(target, '%');
			if (host) {
				*host = '\0';
				host++;
			}
			user = strchr(target, '!');
			if (user) {
				/* msgto form: nick!user@host */
				*user = '******';
				user++;
				nick = target;
				host = server; /* not "@server" but "@host" */
			} else {
				user = target;
			}

			for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
				if (Client_Type(cl) != CLIENT_USER &&
				    Client_Type(cl) != CLIENT_SERVICE)
					continue;
				if (nick != NULL && host != NULL) {
					if (strcasecmp(nick, Client_ID(cl)) == 0 &&
					    strcasecmp(user, Client_User(cl)) == 0 &&
					    strcasecmp(host, Client_HostnameDisplayed(cl)) == 0)
						break;
					else
						continue;
				}
				if (strcasecmp(user, Client_User(cl)) != 0)
					continue;
				if (host != NULL && strcasecmp(host,
						Client_HostnameDisplayed(cl)) != 0)
					continue;
				if (server != NULL && strcasecmp(server,
						Client_ID(Client_Introducer(cl))) != 0)
					continue;
				break;
			}
		}

		if (cl) {
			/* Target is a user, enforce type */
#ifndef STRICT_RFC
			if (Client_Type(cl) != ForceType &&
			    !(ForceType == CLIENT_USER &&
			      (Client_Type(cl) == CLIENT_USER ||
			       Client_Type(cl) == CLIENT_SERVICE))) {
#else
			if (Client_Type(cl) != ForceType) {
#endif
				if (SendErrors && !IRC_WriteErrClient(
				    from, ERR_NOSUCHNICK_MSG,Client_ID(from),
				    currentTarget))
					return DISCONNECTED;
				goto send_next_target;
			}

#ifndef STRICT_RFC
			if (ForceType == CLIENT_SERVICE &&
			    (Conn_Options(Client_Conn(Client_NextHop(cl)))
			     & CONN_RFC1459)) {
				/* SQUERY command but RFC 1459 link: convert
				 * request to PRIVMSG command */
				Req->command = "PRIVMSG";
			}
#endif
			if (Client_HasMode(cl, 'b') &&
			    !Client_HasMode(from, 'R') &&
			    !Client_HasMode(from, 'o') &&
			    !(Client_Type(from) == CLIENT_SERVER) &&
			    !(Client_Type(from) == CLIENT_SERVICE)) {
				if (SendErrors && !IRC_WriteErrClient(from,
						ERR_NONONREG_MSG,
						Client_ID(from), Client_ID(cl)))
					return DISCONNECTED;
				goto send_next_target;
			}

			if (Client_HasMode(cl, 'C')) {
				cl2chan = Channel_FirstChannelOf(cl);
				while (cl2chan) {
					chan = Channel_GetChannel(cl2chan);
					if (Channel_IsMemberOf(chan, from))
						break;
					cl2chan = Channel_NextChannelOf(cl, cl2chan);
				}
				if (!cl2chan) {
					if (SendErrors && !IRC_WriteErrClient(
					    from, ERR_NOTONSAMECHANNEL_MSG,
					    Client_ID(from), Client_ID(cl)))
						return DISCONNECTED;
					goto send_next_target;
				}
			}

			if (SendErrors && (Client_Type(Client) != CLIENT_SERVER)
			    && Client_HasMode(cl, 'a')) {
				/* Target is away */
				if (!IRC_WriteStrClient(from, RPL_AWAY_MSG,
							Client_ID(from),
							Client_ID(cl),
							Client_Away(cl)))
					return DISCONNECTED;
			}
			if (Client_Conn(from) > NONE) {
				Conn_UpdateIdle(Client_Conn(from));
			}
			if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
						      Req->command, Client_ID(cl),
						      message))
				return DISCONNECTED;
		} else if (ForceType != CLIENT_SERVICE
			   && (chan = Channel_Search(currentTarget))) {
			if (!Channel_Write(chan, from, Client, Req->command,
					   SendErrors, message))
					return DISCONNECTED;
		} else if (ForceType != CLIENT_SERVICE
			/* $#: server/target mask, RFC 2812, sec. 3.3.1 */
			   && strchr("$#", currentTarget[0])
			   && strchr(currentTarget, '.')) {
			/* targetmask */
			if (!Send_Message_Mask(from, Req->command, currentTarget,
					       message, SendErrors))
				return DISCONNECTED;
		} else {
			if (!SendErrors)
				return CONNECTED;
			if (!IRC_WriteErrClient(from, ERR_NOSUCHNICK_MSG,
						Client_ID(from), currentTarget))
				return DISCONNECTED;
		}

	send_next_target:
		currentTarget = strtok_r(NULL, ",", &lastCurrentTarget);
		if (currentTarget)
			Conn_SetPenalty(Client_Conn(Client), 1);
	}

	return CONNECTED;
} /* Send_Message */

static bool
Send_Message_Mask(CLIENT * from, char * command, char * targetMask,
		  char * message, bool SendErrors)
{
	CLIENT *cl;
	bool client_match;
	char *mask = targetMask + 1;
	const char *check_wildcards;

	cl = NULL;

	if (!Client_HasMode(from, 'o')) {
		if (!SendErrors)
			return true;
		return IRC_WriteErrClient(from, ERR_NOPRIVILEGES_MSG,
					  Client_ID(from));
	}

	/*
	 * RFC 2812, sec. 3.3.1 requires that targetMask have at least one
	 * dot (".") and no wildcards ("*", "?") following the last one.
	 */
	check_wildcards = strrchr(targetMask, '.');
	assert(check_wildcards != NULL);
	if (check_wildcards &&
		check_wildcards[strcspn(check_wildcards, "*?")])
	{
		if (!SendErrors)
			return true;
		return IRC_WriteErrClient(from, ERR_WILDTOPLEVEL, targetMask);
	}

	/* #: hostmask, see RFC 2812, sec. 3.3.1 */
	if (targetMask[0] == '#') {
		for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
			if (Client_Type(cl) != CLIENT_USER)
				continue;
			client_match = MatchCaseInsensitive(mask, Client_Hostname(cl));
			if (client_match)
				if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
						command, Client_ID(cl), message))
					return false;
		}
	} else {
		assert(targetMask[0] == '$'); /* $: server mask, see RFC 2812, sec. 3.3.1 */
		for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
			if (Client_Type(cl) != CLIENT_USER)
				continue;
			client_match = MatchCaseInsensitive(mask,
					Client_ID(Client_Introducer(cl)));
			if (client_match)
				if (!IRC_WriteStrClientPrefix(cl, from, "%s %s :%s",
						command, Client_ID(cl), message))
					return false;
		}
	}
	return CONNECTED;
} /* Send_Message_Mask */