コード例 #1
0
ファイル: channel.c プロジェクト: Flupsy/ngircd
/**
 * Check if a client is allowed to send to a specific channel.
 *
 * @param Chan The channel to check.
 * @param From The client that wants to send.
 * @return true if the client is allowed to send, false otherwise.
 */
static bool
Can_Send_To_Channel(CHANNEL *Chan, CLIENT *From)
{
	bool is_member, has_voice, is_halfop, is_op, is_chanadmin, is_owner;

	is_member = has_voice = is_halfop = is_op = is_chanadmin = is_owner = false;

	/* The server itself always can send messages :-) */
	if (Client_ThisServer() == From)
		return true;

	if (Channel_IsMemberOf(Chan, From)) {
		is_member = true;
		if (Channel_UserHasMode(Chan, From, 'v'))
			has_voice = true;
		if (Channel_UserHasMode(Chan, From, 'h'))
			is_halfop = true;
		if (Channel_UserHasMode(Chan, From, 'o'))
			is_op = true;
		if (Channel_UserHasMode(Chan, From, 'a'))
			is_chanadmin = true;
		if (Channel_UserHasMode(Chan, From, 'q'))
			is_owner = true;
	}

	/*
	 * Is the client allowed to write to channel?
	 *
	 * If channel mode n set: non-members cannot send to channel.
	 * If channel mode m set: need voice.
	 */
	if (Channel_HasMode(Chan, 'n') && !is_member)
		return false;

	if (Channel_HasMode(Chan, 'M') && !Client_HasMode(From, 'R')
	    && !Client_HasMode(From, 'o'))
		return false;

	if (has_voice || is_halfop || is_op || is_chanadmin || is_owner)
		return true;

	if (Channel_HasMode(Chan, 'm'))
		return false;

	if (Lists_Check(&Chan->list_excepts, From))
		return true;

	return !Lists_Check(&Chan->list_bans, From);
}
コード例 #2
0
ファイル: op.c プロジェクト: LucentW/ngircd
/**
 * Check that the originator of a request is an IRC operator and allowed
 * to administer this server.
 *
 * @param CLient Client from which the command has been received.
 * @param Req Request structure.
 * @return CLIENT structure of the client that initiated the command or
 *	   NULL if client is not allowed to execute operator commands.
 */
GLOBAL CLIENT *
Op_Check(CLIENT * Client, REQUEST * Req)
{
	CLIENT *c;

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

	if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
		c = Client_Search(Req->prefix);
	else
		c = Client;

	if (!c)
		return NULL;
	if (Client_Type(Client) == CLIENT_SERVER
	    && Client_Type(c) == CLIENT_SERVER)
		return c;
	if (!Client_HasMode(c, 'o'))
		return NULL;
	if (Client_Conn(c) <= NONE && !Conf_AllowRemoteOper)
		return NULL;

	/* The client is an local IRC operator, or this server is configured
	 * to trust remote operators. */
	return c;
} /* Op_Check */
コード例 #3
0
ファイル: client.c プロジェクト: kazcw/pande
GLOBAL unsigned long
Client_OperCount( void )
{
	CLIENT *c;
	unsigned long cnt = 0;

	c = My_Clients;
	while( c )
	{
		if (c && c->type == CLIENT_USER && Client_HasMode(c, 'o' ))
			cnt++;
		c = (CLIENT *)c->next;
	}
	return cnt;
} /* Client_OperCount */
コード例 #4
0
ファイル: irc-channel.c プロジェクト: andinue/ngircd
/**
 * Set user channel modes.
 *
 * @param chan		Channel
 * @param target	User to set modes for
 * @param flags		Channel modes to add
 */
static void
join_set_channelmodes(CHANNEL *chan, CLIENT *target, const char *flags)
{
	if (flags) {
		while (*flags) {
			Channel_UserModeAdd(chan, target, *flags);
			flags++;
		}
	}

	/* If the channel is persistent (+P) and client is an IRC op:
	 * make client chanop, if not disabled in configuration. */
	if (Channel_HasMode(chan, 'P') && Conf_OperChanPAutoOp
	    && Client_HasMode(target, 'o'))
		Channel_UserModeAdd(chan, target, 'o');
} /* join_set_channelmodes */
コード例 #5
0
ファイル: client.c プロジェクト: 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 */
コード例 #6
0
ファイル: client.c プロジェクト: kazcw/pande
/**
 * Get (potentially cloaked) hostname of a client to display it to other users.
 *
 * If the client has not enabled cloaking, the real hostname is used.
 *
 * @param Client Pointer to client structure
 * @return Pointer to client hostname
 */
GLOBAL char *
Client_HostnameDisplayed(CLIENT *Client)
{
	assert(Client != NULL);

	/* Client isn't cloaked at all, return real hostname: */
	if (!Client_HasMode(Client, 'x'))
		return Client_Hostname(Client);

	/* Use an already saved cloaked hostname, if there is one */
	if (Client->cloaked)
		return Client->cloaked;

	Client_UpdateCloakedHostname(Client, NULL, NULL);
	return Client->cloaked;
}
コード例 #7
0
ファイル: client.c プロジェクト: kazcw/pande
/**
 * Initialize new client and set up the given parameters like client type,
 * user name, host name, introducing server etc. ...
 * @return New CLIENT structure.
 */
static CLIENT *
Init_New_Client(CONN_ID Idx, CLIENT *Introducer, CLIENT *TopServer,
  int Type, const char *ID, const char *User, const char *Hostname,
  const char *Info, int Hops, int Token, const char *Modes, bool Idented)
{
	CLIENT *client;

	assert(Idx >= NONE);
	assert(Introducer != NULL);

	client = New_Client_Struct();
	if (!client)
		return NULL;

	client->starttime = time(NULL);
	client->conn_id = Idx;
	client->introducer = Introducer;
	client->topserver = TopServer;
	client->type = Type;
	if (ID)
		Client_SetID(client, ID);
	if (User) {
		Client_SetUser(client, User, Idented);
		Client_SetOrigUser(client, User);
	}
	if (Hostname)
		Client_SetHostname(client, Hostname);
	if (Info)
		Client_SetInfo(client, Info);
	client->hops = Hops;
	client->token = Token;
	if (Modes)
		Client_SetModes(client, Modes);
	if (Type == CLIENT_SERVER)
		Generate_MyToken(client);

	if (Client_HasMode(client, 'a'))
		client->away = strndup(DEFAULT_AWAY_MSG, CLIENT_AWAY_LEN - 1);

	client->next = (POINTER *)My_Clients;
	My_Clients = client;

	Adjust_Counters(client);

	return client;
} /* Init_New_Client */
コード例 #8
0
ファイル: client.c プロジェクト: kazcw/pande
GLOBAL bool
Client_ModeAdd( CLIENT *Client, char Mode )
{
	/* Set Mode.
	 * If Client already had Mode, return false.
	 * If the Mode was newly set, return true.
	 */

	char x[2];

	assert( Client != NULL );

	x[0] = Mode; x[1] = '\0';
	if (!Client_HasMode(Client, x[0])) {
		strlcat( Client->modes, x, sizeof( Client->modes ));
		return true;
	}
	else return false;
} /* Client_ModeAdd */
コード例 #9
0
ファイル: channel.c プロジェクト: Flupsy/ngircd
/**
 * Kick user from Channel
 */
GLOBAL void
Channel_Kick(CLIENT *Peer, CLIENT *Target, CLIENT *Origin, const char *Name,
	     const char *Reason )
{
	CHANNEL *chan;
	bool can_kick = false;

	assert(Peer != NULL);
	assert(Target != NULL);
	assert(Origin != NULL);
	assert(Name != NULL);
	assert(Reason != NULL);

	/* Check that channel exists */
	chan = Channel_Search( Name );
	if (!chan) {
		IRC_WriteErrClient(Origin, ERR_NOSUCHCHANNEL_MSG,
				   Client_ID(Origin), Name);
		return;
	}

	if (Client_Type(Peer) != CLIENT_SERVER &&
	    Client_Type(Origin) != CLIENT_SERVICE) {
		/* Check that user is on the specified channel */
		if (!Channel_IsMemberOf(chan, Origin)) {
			IRC_WriteErrClient(Origin, ERR_NOTONCHANNEL_MSG,
					   Client_ID(Origin), Name);
			return;
		}
	}

	/* Check that the client to be kicked is on the specified channel */
	if (!Channel_IsMemberOf(chan, Target)) {
		IRC_WriteErrClient(Origin, ERR_USERNOTINCHANNEL_MSG,
				   Client_ID(Origin), Client_ID(Target), Name );
		return;
	}

	if(Client_Type(Peer) == CLIENT_USER) {
		/* Channel mode 'Q' and user mode 'q' on target: nobody but
		 * IRC Operators and servers can kick the target user */
		if ((Channel_HasMode(chan, 'Q')
		     || Client_HasMode(Target, 'q')
		     || Client_Type(Target) == CLIENT_SERVICE)
		    && !Client_HasMode(Origin, 'o')) {
			IRC_WriteErrClient(Origin, ERR_KICKDENY_MSG,
					   Client_ID(Origin), Name,
					   Client_ID(Target));
			return;
		}

		/* Check if client has the rights to kick target */

		/* Owner can kick everyone */
		if (Channel_UserHasMode(chan, Peer, 'q'))
			can_kick = true;

		/* Admin can't kick owner */
		else if (Channel_UserHasMode(chan, Peer, 'a') &&
		    !Channel_UserHasMode(chan, Target, 'q'))
			can_kick = true;

		/* Op can't kick owner | admin */
		else if (Channel_UserHasMode(chan, Peer, 'o') &&
		    !Channel_UserHasMode(chan, Target, 'q') &&
		    !Channel_UserHasMode(chan, Target, 'a'))
			can_kick = true;
			
		/* Half Op can't kick owner | admin | op */ 
		else if (Channel_UserHasMode(chan, Peer, 'h') &&
		    !Channel_UserHasMode(chan, Target, 'q') &&
		    !Channel_UserHasMode(chan, Target, 'a') &&
		    !Channel_UserHasMode(chan, Target, 'o'))
			can_kick = true;
		
		/* IRC operators & IRCd with OperCanMode enabled
		 * can kick anyways regardless of privilege */	
		else if(Client_HasMode(Origin, 'o') && Conf_OperCanMode)
		    can_kick = true;

		if(!can_kick) {
			IRC_WriteErrClient(Origin, ERR_CHANOPPRIVTOOLOW_MSG,
					   Client_ID(Origin), Name);
			return;
		}
	}

	/* Kick Client from channel */
	Remove_Client( REMOVE_KICK, chan, Target, Origin, Reason, true);
} /* Channel_Kick */
コード例 #10
0
ファイル: irc-mode.c プロジェクト: LucentW/ngircd
/**
 * 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)
{
	char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
	    argadd[CLIENT_PASS_LEN], *mode_ptr;
	bool connected, set, skiponce, retval, use_servermode,
	     is_halfop, is_op, is_admin, is_owner, is_machine, is_oper;
	int mode_arg, arg_arg, mode_arg_count = 0;
	CLIENT *client;
	long l;
	size_t len;

	is_halfop = is_op = is_admin = is_owner = is_machine = is_oper = false;

	if (Channel_IsModeless(Channel))
		return IRC_WriteErrClient(Client, ERR_NOCHANMODES_MSG,
				Client_ID(Client), Channel_Name(Channel));

	/* Mode request: let's answer it :-) */
	if (Req->argc <= 1)
		return Channel_Mode_Answer_Request(Origin, Channel);

	/* Check if origin is oper and opers can use mode */
	use_servermode = Conf_OperServerMode;
	if(Client_HasMode(Client, 'o') && Conf_OperCanMode) {
		is_oper = true;
	}

	/* Check if client is a server/service */
	if(Client_Type(Client) == CLIENT_SERVER ||
	   Client_Type(Client) == CLIENT_SERVICE) {
		is_machine = true;
	}

	/* Check if client is member of channel or an oper or an server/service */
	if(!Channel_IsMemberOf(Channel, Client) && !is_oper && !is_machine)
		return IRC_WriteErrClient(Origin, ERR_NOTONCHANNEL_MSG,
					  Client_ID(Origin),
					  Channel_Name(Channel));

	mode_arg = 1;
	mode_ptr = Req->argv[mode_arg];
	if (Req->argc > mode_arg + 1)
		arg_arg = mode_arg + 1;
	else
		arg_arg = -1;

	/* Initial state: set or unset modes? */
	skiponce = false;
	switch (*mode_ptr) {
	case '-':
		set = false;
		break;
	case '+':
		set = true;
		break;
	default:
		set = true;
		skiponce = true;
	}

	/* Prepare reply string */
	strcpy(the_modes, set ? "+" : "-");
	the_args[0] = '\0';

	x[1] = '\0';
	connected = CONNECTED;
	while (mode_ptr) {
		if (!skiponce)
			mode_ptr++;
		if (!*mode_ptr) {
			/* Try next argument if there's any */
			if (arg_arg < 0)
				break;
			if (arg_arg > mode_arg)
				mode_arg = arg_arg;
			else
				mode_arg++;

			if (mode_arg >= Req->argc)
				break;
			mode_ptr = Req->argv[mode_arg];

			if (Req->argc > mode_arg + 1)
				arg_arg = mode_arg + 1;
			else
				arg_arg = -1;
		}
		skiponce = false;

		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] == '-') {
					/* Adjust last action modifier in result */
					the_modes[len] = *mode_ptr;
				} else {
					/* Append modifier character to result string */
					x[0] = *mode_ptr;
					strlcat(the_modes, x, sizeof(the_modes));
				}
				set = *mode_ptr == '+';
			}
			continue;
		}

		/* Are there arguments left? */
		if (arg_arg >= Req->argc)
			arg_arg = -1;

		if(!is_machine && !is_oper) {
			if (Channel_UserHasMode(Channel, Client, 'q'))
				is_owner = true;
			if (Channel_UserHasMode(Channel, Client, 'a'))
				is_admin = true;
			if (Channel_UserHasMode(Channel, Client, 'o'))
				is_op = true;
			if (Channel_UserHasMode(Channel, Client, 'h'))
				is_halfop = true;
		}

		/* Validate modes */
		x[0] = '\0';
		argadd[0] = '\0';
		client = NULL;
		switch (*mode_ptr) {
		/* --- Channel modes --- */
		case 'R': /* Registered users only */
		case 's': /* Secret channel */
		case 'z': /* Secure connections only */
			if(!is_oper && !is_machine && !is_owner &&
			   !is_admin && !is_op) {
				connected = IRC_WriteErrClient(Origin,
					ERR_CHANOPRIVSNEEDED_MSG,
					Client_ID(Origin), Channel_Name(Channel));
				goto chan_exit;
			}
		case 'i': /* Invite only */
		case 'V': /* Invite disallow */
		case 'M': /* Only identified nicks can write */
		case 'm': /* Moderated */
		case 'n': /* Only members can write */
		case 'N': /* Can't change nick while on this channel */
		case 'Q': /* No kicks */
		case 't': /* Topic locked */
			if(is_oper || is_machine || is_owner ||
			   is_admin || is_op || is_halfop)
				x[0] = *mode_ptr;
			else
				connected = IRC_WriteErrClient(Origin,
					ERR_CHANOPRIVSNEEDED_MSG,
					Client_ID(Origin), Channel_Name(Channel));
			break;
		case 'k': /* Channel key */
			if (Mode_Limit_Reached(Client, mode_arg_count++))
				goto chan_exit;
			if (!set) {
				if (is_oper || is_machine || is_owner ||
				    is_admin || is_op || is_halfop) {
					x[0] = *mode_ptr;
					if (Channel_HasMode(Channel, 'k'))
						strlcpy(argadd, "*", sizeof(argadd));
					if (arg_arg > mode_arg)
						arg_arg++;
				} else
					connected = IRC_WriteErrClient(Origin,
						ERR_CHANOPRIVSNEEDED_MSG,
						Client_ID(Origin),
						Channel_Name(Channel));
				break;
			}
			if (arg_arg > mode_arg) {
				if (is_oper || is_machine || is_owner ||
				    is_admin || is_op || is_halfop) {
					Channel_ModeDel(Channel, 'k');
					Channel_SetKey(Channel,
						       Req->argv[arg_arg]);
					strlcpy(argadd, Channel_Key(Channel),
						sizeof(argadd));
					x[0] = *mode_ptr;
				} else {
					connected = IRC_WriteErrClient(Origin,
						ERR_CHANOPRIVSNEEDED_MSG,
						Client_ID(Origin),
						Channel_Name(Channel));
				}
				Req->argv[arg_arg][0] = '\0';
				arg_arg++;
			} else {
#ifdef STRICT_RFC
				/* Only send error message in "strict" mode,
				 * this is how ircd2.11 and others behave ... */
				connected = IRC_WriteErrClient(Origin,
					ERR_NEEDMOREPARAMS_MSG,
					Client_ID(Origin), Req->command);
#endif
				goto chan_exit;
			}
			break;
		case 'l': /* Member limit */
			if (Mode_Limit_Reached(Client, mode_arg_count++))
				goto chan_exit;
			if (!set) {
				if (is_oper || is_machine || is_owner ||
				    is_admin || is_op || is_halfop)
					x[0] = *mode_ptr;
				else
					connected = IRC_WriteErrClient(Origin,
						ERR_CHANOPRIVSNEEDED_MSG,
						Client_ID(Origin),
						Channel_Name(Channel));
				break;
			}
			if (arg_arg > mode_arg) {
				if (is_oper || is_machine || is_owner ||
				    is_admin || is_op || is_halfop) {
					l = atol(Req->argv[arg_arg]);
					if (l > 0 && l < 0xFFFF) {
						Channel_ModeDel(Channel, 'l');
						Channel_SetMaxUsers(Channel, l);
						snprintf(argadd, sizeof(argadd),
							 "%ld", l);
						x[0] = *mode_ptr;
					}
				} else {
					connected = IRC_WriteErrClient(Origin,
						ERR_CHANOPRIVSNEEDED_MSG,
						Client_ID(Origin),
						Channel_Name(Channel));
				}
				Req->argv[arg_arg][0] = '\0';
				arg_arg++;
			} else {
#ifdef STRICT_RFC
				/* Only send error message in "strict" mode,
				 * this is how ircd2.11 and others behave ... */
				connected = IRC_WriteErrClient(Origin,
					ERR_NEEDMOREPARAMS_MSG,
					Client_ID(Origin), Req->command);
#endif
				goto chan_exit;
			}
			break;
		case 'O': /* IRC operators only */
			if (set) {
				/* Only IRC operators are allowed to
				 * set the 'O' channel mode! */
				if(is_oper || is_machine)
					x[0] = 'O';
				else
					connected = IRC_WriteErrClient(Origin,
						ERR_NOPRIVILEGES_MSG,
						Client_ID(Origin));
			} else if(is_oper || is_machine || is_owner ||
				  is_admin || is_op)
				x[0] = 'O';
			else
				connected = IRC_WriteErrClient(Origin,
					ERR_CHANOPRIVSNEEDED_MSG,
					Client_ID(Origin),
					Channel_Name(Channel));
			break;
		case 'P': /* Persistent channel */
			if (set) {
				/* Only IRC operators are allowed to
				 * set the 'P' channel mode! */
				if(is_oper || is_machine)
					x[0] = 'P';
				else
					connected = IRC_WriteErrClient(Origin,
						ERR_NOPRIVILEGES_MSG,
						Client_ID(Origin));
			} else if(is_oper || is_machine || is_owner ||
				  is_admin || is_op)
				x[0] = 'P';
			else
				connected = IRC_WriteErrClient(Origin,
					ERR_CHANOPRIVSNEEDED_MSG,
					Client_ID(Origin),
					Channel_Name(Channel));
			break;
		/* --- Channel user modes --- */
		case 'q': /* Owner */
		case 'a': /* Channel admin */
			if(!is_oper && !is_machine && !is_owner && !is_admin) {
				connected = IRC_WriteErrClient(Origin,
					ERR_CHANOPPRIVTOOLOW_MSG,
					Client_ID(Origin),
					Channel_Name(Channel));
				goto chan_exit;
			}
		case 'o': /* Channel operator */
			if(!is_oper && !is_machine && !is_owner &&
			   !is_admin && !is_op) {
				connected = IRC_WriteErrClient(Origin,
					ERR_CHANOPRIVSNEEDED_MSG,
					Client_ID(Origin),
					Channel_Name(Channel));
				goto chan_exit;
			}
		case 'h': /* Half Op */
			if(!is_oper && !is_machine && !is_owner &&
			   !is_admin && !is_op) {
				connected = IRC_WriteErrClient(Origin,
					ERR_CHANOPRIVSNEEDED_MSG,
					Client_ID(Origin),
					Channel_Name(Channel));
				goto chan_exit;
			}
		case 'v': /* Voice */
			if (arg_arg > mode_arg) {
				if (is_oper || is_machine || is_owner ||
				    is_admin || is_op || is_halfop) {
					client = Client_Search(Req->argv[arg_arg]);
					if (client)
						x[0] = *mode_ptr;
					else
						connected = IRC_WriteErrClient(Origin,
							ERR_NOSUCHNICK_MSG,
							Client_ID(Origin),
							Req->argv[arg_arg]);
				} else {
					connected = IRC_WriteErrClient(Origin,
						ERR_CHANOPRIVSNEEDED_MSG,
						Client_ID(Origin),
						Channel_Name(Channel));
				}
				Req->argv[arg_arg][0] = '\0';
				arg_arg++;
			} else {
#ifdef STRICT_RFC
				/* Report an error to the client, when a user
				 * mode should be changed but no nickname is
				 * given. But don't do it when not in "strict"
				 * mode, because most other servers don't do
				 * it as well and some clients send "wired"
				 * MODE commands like "MODE #chan -ooo nick". */
				connected = IRC_WriteErrClient(Origin,
					ERR_NEEDMOREPARAMS_MSG,
					Client_ID(Origin), Req->command);
#endif
				goto chan_exit;
			}
			break;
		/* --- Channel lists --- */
		case 'I': /* Invite lists */
		case 'b': /* Ban lists */
		case 'e': /* Channel exception lists */
			if (Mode_Limit_Reached(Client, mode_arg_count++))
				goto chan_exit;
			if (arg_arg > mode_arg) {
				/* modify list */
				if (is_oper || is_machine || is_owner ||
				    is_admin || is_op || is_halfop) {
					connected = set
					   ? Add_To_List(*mode_ptr, Origin,
						Client, Channel,
						Req->argv[arg_arg])
					   : Del_From_List(*mode_ptr, Origin,
						Client, Channel,
						Req->argv[arg_arg]);
				} else {
					connected = IRC_WriteErrClient(Origin,
						ERR_CHANOPRIVSNEEDED_MSG,
						Client_ID(Origin),
						Channel_Name(Channel));
				}
				Req->argv[arg_arg][0] = '\0';
				arg_arg++;
			} else {
				switch (*mode_ptr) {
				case 'I':
					Channel_ShowInvites(Origin, Channel);
					break;
				case 'b':
					Channel_ShowBans(Origin, Channel);
					break;
				case 'e':
					Channel_ShowExcepts(Origin, Channel);
					break;
				}
			}
			break;
		default:
			if (Client_Type(Client) != CLIENT_SERVER) {
				Log(LOG_DEBUG,
				    "Unknown mode \"%c%c\" from \"%s\" on %s!?",
				    set ? '+' : '-', *mode_ptr,
				    Client_ID(Origin), Channel_Name(Channel));
				connected = IRC_WriteErrClient(Origin,
					ERR_UNKNOWNMODE_MSG,
					Client_ID(Origin), *mode_ptr,
					Channel_Name(Channel));
				x[0] = '\0';
			} else {
				Log(LOG_DEBUG,
				    "Handling unknown mode \"%c%c\" from \"%s\" on %s ...",
				    set ? '+' : '-', *mode_ptr,
				    Client_ID(Origin), Channel_Name(Channel));
				x[0] = *mode_ptr;
			}
		}

		if (!connected)
			break;

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

		/* Validate target client */
		if (client && (!Channel_IsMemberOf(Channel, client))) {
			if (!IRC_WriteErrClient(Origin, ERR_USERNOTINCHANNEL_MSG,
						Client_ID(Origin),
						Client_ID(client),
						Channel_Name(Channel)))
				break;
			continue;
		}

		if (client) {
			/* Channel-User-Mode */
			retval = set
			       ? Channel_UserModeAdd(Channel, client, x[0])
			       : Channel_UserModeDel(Channel, client, x[0]);
			if (retval) {
				strlcat(the_args, " ", sizeof(the_args));
				strlcat(the_args, Client_ID(client),
					sizeof(the_args));
				strlcat(the_modes, x, sizeof(the_modes));
				LogDebug
				    ("User \"%s\": Mode change on %s, now \"%s\"",
				     Client_Mask(client), Channel_Name(Channel),
				     Channel_UserModes(Channel, client));
			}
		} else {
			/* Channel-Mode */
			retval = set
			       ? Channel_ModeAdd(Channel, x[0])
			       : Channel_ModeDel(Channel, x[0]);
			if (retval) {
				strlcat(the_modes, x, sizeof(the_modes));
				LogDebug("Channel %s: Mode change, now \"%s\".",
					 Channel_Name(Channel),
					 Channel_Modes(Channel));
			}
		}

		/* Are there additional arguments to add? */
		if (argadd[0]) {
			strlcat(the_args, " ", sizeof(the_args));
			strlcat(the_args, argadd, sizeof(the_args));
		}
	}

      chan_exit:
	/* Are there changed modes? */
	if (the_modes[1]) {
		/* Clean up mode string */
		len = strlen(the_modes) - 1;
		if ((the_modes[len] == '+') || (the_modes[len] == '-'))
			the_modes[len] = '\0';

		if (Client_Type(Client) == CLIENT_SERVER) {
			/* MODE requests for local channels from other servers
			 * are definitely invalid! */
			if (Channel_IsLocal(Channel)) {
				Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
				return CONNECTED;
			}

			/* Forward mode changes to channel users and all the
			 * other remote servers: */
			IRC_WriteStrServersPrefix(Client, Origin,
				"MODE %s %s%s", Channel_Name(Channel),
				the_modes, the_args);
			IRC_WriteStrChannelPrefix(Client, Channel, Origin,
				false, "MODE %s %s%s", Channel_Name(Channel),
				the_modes, the_args);
		} else {
			if (use_servermode)
				Origin = Client_ThisServer();
			/* Send reply to client and inform other servers and channel users */
			connected = IRC_WriteStrClientPrefix(Client, Origin,
					"MODE %s %s%s", Channel_Name(Channel),
					the_modes, the_args);
			/* Only forward requests for non-local channels */
			if (!Channel_IsLocal(Channel))
				IRC_WriteStrServersPrefix(Client, Origin,
					"MODE %s %s%s", Channel_Name(Channel),
					the_modes, the_args);
			IRC_WriteStrChannelPrefix(Client, Channel, Origin,
				false, "MODE %s %s%s", Channel_Name(Channel),
				the_modes, the_args);
		}
	}

	return connected;
} /* Channel_Mode */
コード例 #11
0
ファイル: channel.c プロジェクト: husemann/ngircd
/**
 * Kick user from Channel
 */
GLOBAL void
Channel_Kick(CLIENT *Peer, CLIENT *Target, CLIENT *Origin, const char *Name,
	     const char *Reason )
{
	CHANNEL *chan;
	char *ptr, *target_modes;
	bool can_kick = false;

	assert(Peer != NULL);
	assert(Target != NULL);
	assert(Origin != NULL);
	assert(Name != NULL);
	assert(Reason != NULL);

	/* Check that channel exists */
	chan = Channel_Search( Name );
	if( ! chan )
	{
		IRC_WriteStrClient( Origin, ERR_NOSUCHCHANNEL_MSG, Client_ID( Origin ), Name );
		return;
	}

	if (Client_Type(Peer) != CLIENT_SERVER &&
	    Client_Type(Origin) != CLIENT_SERVICE) {
		/* Check that user is on the specified channel */
		if (!Channel_IsMemberOf(chan, Origin)) {
			IRC_WriteStrClient( Origin, ERR_NOTONCHANNEL_MSG,
					    Client_ID(Origin), Name);
			return;
		}
	}

	if(Client_Type(Peer) == CLIENT_USER) {
		/* Channel mode 'Q' and user mode 'q' on target: nobody but
		 * IRC Operators and servers can kick the target user */
		if ((strchr(Channel_Modes(chan), 'Q')
		     || Client_HasMode(Target, 'q')
		     || Client_Type(Target) == CLIENT_SERVICE)
		    && !Client_HasMode(Origin, 'o')) {
			IRC_WriteStrClient(Origin, ERR_KICKDENY_MSG,
					   Client_ID(Origin), Name,
					   Client_ID(Target));
			return;
		}

		/* Check if client has the rights to kick target */
		ptr = Channel_UserModes(chan, Peer);
		target_modes = Channel_UserModes(chan, Target);
		while(*ptr) {
			/* Owner can kick everyone */
			if ( *ptr == 'q') {
				can_kick = true;
				break;
			}
			/* Admin can't kick owner */
			if ( *ptr == 'a' ) {
				if (!strchr(target_modes, 'q')) {
					can_kick = true;
					break;
				}
			}
			/* Op can't kick owner | admin */
			if ( *ptr == 'o' ) {
				if (!strchr(target_modes, 'q') &&
				    !strchr(target_modes, 'a')) {
					can_kick = true;
					break;
				}
			}
			/* Half Op can't kick owner | admin | op */ 
			if ( *ptr == 'h' ) {
				if (!strchr(target_modes, 'q') &&
				    !strchr(target_modes, 'a') &&
				    !strchr(target_modes, 'o')) {
					can_kick = true;
					break;
				}
			}
			ptr++;
		}

		if(!can_kick) {
			IRC_WriteStrClient(Origin, ERR_CHANOPPRIVTOOLOW_MSG,
				Client_ID(Origin), Name);
			return;
		}
	}

	/* Check that the client to be kicked is on the specified channel */
	if (!Channel_IsMemberOf(chan, Target)) {
		IRC_WriteStrClient(Origin, ERR_USERNOTINCHANNEL_MSG,
				   Client_ID(Origin), Client_ID(Target), Name );
		return;
	}

	/* Kick Client from channel */
	Remove_Client( REMOVE_KICK, chan, Target, Origin, Reason, true);
} /* Channel_Kick */
コード例 #12
0
ファイル: irc-server.c プロジェクト: mguindin/ngircd
/**
 * Handler for the IRC command "SQUIT".
 * See RFC 2813 section 4.1.2 and RFC 2812 section 3.1.8.
 */
GLOBAL bool
IRC_SQUIT(CLIENT * Client, REQUEST * Req)
{
	char msg[COMMAND_LEN], logmsg[COMMAND_LEN];
	CLIENT *from, *target;
	CONN_ID con;
	int loglevel;

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

	if (Client_Type(Client) != CLIENT_SERVER
	    && !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);

	if (Client_Type(Client) == CLIENT_SERVER && Req->prefix) {
		from = Client_Search(Req->prefix);
		if (Client_Type(from) != CLIENT_SERVER
		    && !Op_Check(Client, Req))
			return Op_NoPrivileges(Client, Req);
	} else
		from = Client;
	if (!from)
		return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
					  Client_ID(Client), Req->prefix);

	if (Client_Type(Client) == CLIENT_USER)
		loglevel = LOG_NOTICE | LOG_snotice;
	else
		loglevel = LOG_DEBUG;
	Log(loglevel, "Got SQUIT from %s for \"%s\": \"%s\" ...",
	    Client_ID(from), Req->argv[0], Req->argv[1]);

	target = Client_Search(Req->argv[0]);
	if (Client_Type(Client) != CLIENT_SERVER &&
	    target == Client_ThisServer())
		return Op_NoPrivileges(Client, Req);
	if (!target) {
		/* The server is (already) unknown */
		Log(LOG_WARNING,
		    "Got SQUIT from %s for unknown server \"%s\"!?",
		    Client_ID(Client), Req->argv[0]);
		return CONNECTED;
	}

	con = Client_Conn(target);

	if (Req->argv[1][0])
		if (Client_NextHop(from) != Client || con > NONE)
			snprintf(msg, sizeof(msg), "%s (SQUIT from %s)",
				 Req->argv[1], Client_ID(from));
		else
			strlcpy(msg, Req->argv[1], sizeof(msg));
	else
		snprintf(msg, sizeof(msg), "Got SQUIT from %s",
			 Client_ID(from));

	if (con > NONE) {
		/* We are directly connected to the target server, so we
		 * have to tear down the connection and to inform all the
		 * other remaining servers in the network */
		IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
				"Received SQUIT %s from %s: %s",
				Req->argv[0], Client_ID(from),
				Req->argv[1][0] ? Req->argv[1] : "-");
		Conn_Close(con, NULL, msg, true);
		if (con == Client_Conn(Client))
			return DISCONNECTED;
	} else {
		/* This server is not directly connected, so the SQUIT must
		 * be forwarded ... */
		if (Client_Type(from) != CLIENT_SERVER) {
			/* The origin is not an IRC server, so don't evaluate
			 * this SQUIT but simply forward it */
			IRC_WriteStrClientPrefix(Client_NextHop(target),
			    from, "SQUIT %s :%s", Req->argv[0], Req->argv[1]);
		} else {
			/* SQUIT has been generated by another server, so
			 * remove the target server from the network! */
			logmsg[0] = '\0';
			if (!strchr(msg, '('))
				snprintf(logmsg, sizeof(logmsg),
					 "%s (SQUIT from %s)", Req->argv[1],
					 Client_ID(from));
			Client_Destroy(target, logmsg[0] ? logmsg : msg,
				       msg, false);
		}
	}
	return CONNECTED;
} /* IRC_SQUIT */
コード例 #13
0
ファイル: irc-channel.c プロジェクト: andinue/ngircd
/**
 * Check weather a local client is allowed to join an already existing
 * channel or not.
 *
 * @param Client	Client that sent the JOIN command
 * @param chan		Channel to check
 * @param channame	Name of the channel
 * @param key		Provided channel key (or NULL)
 * @returns		true if client is allowed to join, false otherwise
 */
static bool
join_allowed(CLIENT *Client, CHANNEL *chan, const char *channame,
	     const char *key)
{
	bool is_invited, is_banned, is_exception;

	/* Allow IRC operators to overwrite channel limits */
	if (Client_HasMode(Client, 'o'))
		return true;

	is_banned = Lists_Check(Channel_GetListBans(chan), Client);
	is_exception = Lists_Check(Channel_GetListExcepts(chan), Client);
	is_invited = Lists_Check(Channel_GetListInvites(chan), Client);

	if (is_banned && !is_invited && !is_exception) {
		/* Client is banned from channel (and not on invite list) */
		IRC_WriteErrClient(Client, ERR_BANNEDFROMCHAN_MSG,
				   Client_ID(Client), channame);
		return false;
	}

	if (Channel_HasMode(chan, 'i') && !is_invited) {
		/* Channel is "invite-only" and client is not on invite list */
		IRC_WriteErrClient(Client, ERR_INVITEONLYCHAN_MSG,
				   Client_ID(Client), channame);
		return false;
	}

	if (!Channel_CheckKey(chan, Client, key ? key : "")) {
		/* Channel is protected by a channel key and the client
		 * didn't specify the correct one */
		IRC_WriteErrClient(Client, ERR_BADCHANNELKEY_MSG,
				   Client_ID(Client), channame);
		return false;
	}

	if (Channel_HasMode(chan, 'l') &&
	    (Channel_MaxUsers(chan) <= Channel_MemberCount(chan))) {
		/* There are more clints joined to this channel than allowed */
		IRC_WriteErrClient(Client, ERR_CHANNELISFULL_MSG,
				   Client_ID(Client), channame);
		return false;
	}

	if (Channel_HasMode(chan, 'z') && !Conn_UsesSSL(Client_Conn(Client))) {
		/* Only "secure" clients are allowed, but clients doesn't
		 * use SSL encryption */
		IRC_WriteErrClient(Client, ERR_SECURECHANNEL_MSG,
				   Client_ID(Client), channame);
		return false;
	}

	if (Channel_HasMode(chan, 'O') && !Client_HasMode(Client, 'o')) {
		/* Only IRC operators are allowed! */
		IRC_WriteErrClient(Client, ERR_OPONLYCHANNEL_MSG,
				   Client_ID(Client), channame);
		return false;
	}

	if (Channel_HasMode(chan, 'R') && !Client_HasMode(Client, 'R')) {
		/* Only registered users are allowed! */
		IRC_WriteErrClient(Client, ERR_REGONLYCHANNEL_MSG,
				   Client_ID(Client), channame);
		return false;
	}

	return true;
} /* join_allowed */
コード例 #14
0
ファイル: irc-channel.c プロジェクト: andinue/ngircd
/**
 * Handler for the IRC "LIST" 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_LIST( CLIENT *Client, REQUEST *Req )
{
	char *pattern;
	CHANNEL *chan;
	CLIENT *from, *target;
	int count = 0;

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

	_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)

	if (Req->argc > 0)
		pattern = strtok(Req->argv[0], ",");
	else
		pattern = "*";

	if (Req->argc == 2) {
		/* Forward to other server? */
		target = Client_Search(Req->argv[1]);
		if (! target || Client_Type(target) != CLIENT_SERVER)
			return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
						  Client_ID(Client),
						  Req->argv[1]);

		if (target != Client_ThisServer()) {
			/* Target is indeed an other server, forward it! */
			return IRC_WriteStrClientPrefix(target, from,
							"LIST %s :%s",
							Req->argv[0],
							Req->argv[1]);
		}
	}

	while (pattern) {
		/* Loop through all the channels */
		if (Req->argc > 0)
			ngt_LowerStr(pattern);
		chan = Channel_First();
		while (chan) {
			/* Check search pattern */
			if (MatchCaseInsensitive(pattern, Channel_Name(chan))) {
				/* Gotcha! */
				if (!Channel_HasMode(chan, 's')
				    || Channel_IsMemberOf(chan, from)
				    || (!Conf_MorePrivacy
					&& Client_HasMode(Client, 'o')
					&& Client_Conn(Client) > NONE))
				{
					if ((Conf_MaxListSize > 0)
					    && IRC_CheckListTooBig(from, count,
								   Conf_MaxListSize,
								   "LIST"))
						break;
					if (!IRC_WriteStrClient(from,
					     RPL_LIST_MSG, Client_ID(from),
					     Channel_Name(chan),
					     Channel_MemberCount(chan),
					     Channel_Topic( chan )))
						return DISCONNECTED;
					count++;
				}
			}
			chan = Channel_Next(chan);
		}

		/* Get next name ... */
		if(Req->argc > 0)
			pattern = strtok(NULL, ",");
		else
			pattern = NULL;
	}

	return IRC_WriteStrClient(from, RPL_LISTEND_MSG, Client_ID(from));
} /* IRC_LIST */
コード例 #15
0
ファイル: irc-channel.c プロジェクト: andinue/ngircd
/**
 * Handler for the IRC "TOPIC" 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_TOPIC( CLIENT *Client, REQUEST *Req )
{
	CHANNEL *chan;
	CLIENT *from;
	char *topic;
	bool r, topic_power;

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

	_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)

	chan = Channel_Search(Req->argv[0]);
	if (!chan)
		return IRC_WriteErrClient(from, ERR_NOSUCHCHANNEL_MSG,
					  Client_ID(from), Req->argv[0]);

	/* Only remote servers and channel members are allowed to change the
	 * channel topic, and IRC operators when the Conf_OperCanMode option
	 * is set in the server configuration. */
	if (Client_Type(Client) != CLIENT_SERVER) {
		topic_power = Client_HasMode(from, 'o');
		if (!Channel_IsMemberOf(chan, from)
		    && !(Conf_OperCanMode && topic_power))
			return IRC_WriteErrClient(from, ERR_NOTONCHANNEL_MSG,
						  Client_ID(from), Req->argv[0]);
	} else
		topic_power = true;

	if (Req->argc == 1) {
		/* Request actual topic */
		topic = Channel_Topic(chan);
		if (*topic) {
			r = IRC_WriteStrClient(from, RPL_TOPIC_MSG,
					       Client_ID(Client),
					       Channel_Name(chan), topic);
#ifndef STRICT_RFC
			if (!r)
				return r;
			r = IRC_WriteStrClient(from, RPL_TOPICSETBY_MSG,
					       Client_ID(Client),
					       Channel_Name(chan),
					       Channel_TopicWho(chan),
					       Channel_TopicTime(chan));
#endif
			return r;
		}
		else
			return IRC_WriteStrClient(from, RPL_NOTOPIC_MSG,
						  Client_ID(from),
						  Channel_Name(chan));
	}

	if (Channel_HasMode(chan, 't')) {
		/* Topic Lock. Is the user a channel op or IRC operator? */
		if(!topic_power &&
		   !Channel_UserHasMode(chan, from, 'h') &&
		   !Channel_UserHasMode(chan, from, 'o') &&
		   !Channel_UserHasMode(chan, from, 'a') &&
		   !Channel_UserHasMode(chan, from, 'q'))
			return IRC_WriteErrClient(from, ERR_CHANOPRIVSNEEDED_MSG,
						  Client_ID(from),
						  Channel_Name(chan));
	}

	/* Set new topic */
	Channel_SetTopic(chan, from, Req->argv[1]);
	LogDebug("%s \"%s\" set topic on \"%s\": %s",
		 Client_TypeText(from), Client_Mask(from), Channel_Name(chan),
		 Req->argv[1][0] ? Req->argv[1] : "<none>");

	if (Conf_OperServerMode)
		from = Client_ThisServer();

	/* Update channel and forward new topic to other servers */
	if (!Channel_IsLocal(chan))
		IRC_WriteStrServersPrefix(Client, from, "TOPIC %s :%s",
					  Req->argv[0], Req->argv[1]);
	IRC_WriteStrChannelPrefix(Client, chan, from, false, "TOPIC %s :%s",
				  Req->argv[0], Req->argv[1]);

	if (Client_Type(Client) == CLIENT_USER)
		return IRC_WriteStrClientPrefix(Client, Client, "TOPIC %s :%s",
						Req->argv[0], Req->argv[1]);
	else
		return CONNECTED;
} /* IRC_TOPIC */
コード例 #16
0
ファイル: irc-op.c プロジェクト: asterIRC/ngIRCd-xpfx
/**
 * Handler for the IRC command "INVITE".
 *
 * @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_INVITE(CLIENT *Client, REQUEST *Req)
{
	CHANNEL *chan;
	CLIENT *target, *from;
	const char *colon_if_necessary;
	bool remember = false;

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

	_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)

	/* Search user */
	target = Client_Search(Req->argv[0]);
	if (!target || (Client_Type(target) != CLIENT_USER))
		return IRC_WriteErrClient(from, ERR_NOSUCHNICK_MSG,
					  Client_ID(Client), Req->argv[0]);

	chan = Channel_Search(Req->argv[1]);
	if (chan) {
		/* Channel exists. Is the user a valid member of the channel? */
		if (!Channel_IsMemberOf(chan, from))
			return IRC_WriteErrClient(from, ERR_NOTONCHANNEL_MSG,
						  Client_ID(Client),
						  Req->argv[1]);

		/* Is the channel "invite-disallow"? */
		if (Channel_HasMode(chan, 'V'))
			return IRC_WriteErrClient(from, ERR_NOINVITE_MSG,
						  Client_ID(from),
						  Channel_Name(chan));

		/* Is the channel "invite-only"? */
		if (Channel_HasMode(chan, 'i')) {
			/* Yes. The user issuing the INVITE command must be
			 * channel owner/admin/operator/halfop! */
			if (!Channel_UserHasMode(chan, from, 'q') &&
			    !Channel_UserHasMode(chan, from, 'a') &&
			    !Channel_UserHasMode(chan, from, 'o') &&
			    !Channel_UserHasMode(chan, from, 'h'))
				return IRC_WriteErrClient(from,
							  ERR_CHANOPRIVSNEEDED_MSG,
							  Client_ID(from),
							  Channel_Name(chan));
			remember = true;
		}

		/* Is the target user already member of the channel? */
		if (Channel_IsMemberOf(chan, target))
			return IRC_WriteErrClient(from, ERR_USERONCHANNEL_MSG,
						  Client_ID(from),
						  Req->argv[0], Req->argv[1]);

		/* If the target user is banned on that channel: remember invite */
		if (Lists_Check(Channel_GetListBans(chan), target))
			remember = true;

		if (remember) {
			/* We must remember this invite */
			if (!Channel_AddInvite(chan, Client_MaskCloaked(target),
						true))
				return CONNECTED;
		}
	}

	LogDebug("User \"%s\" invites \"%s\" to \"%s\" ...", Client_Mask(from),
		 Req->argv[0], Req->argv[1]);

	/*
	 * RFC 2812 states:
	 * 'There is no requirement that the channel [..] must exist or be a
	 * valid channel'. The problem with this is that this allows the
	 * "channel" to contain spaces, in which case we must prefix its name
	 * with a colon to make it clear that it is only a single argument.
	 */
	colon_if_necessary = strchr(Req->argv[1], ' ') ? ":":"";
	/* Inform target client */
	IRC_WriteStrClientPrefix(target, from, "INVITE %s %s%s", Req->argv[0],
				  colon_if_necessary, Req->argv[1]);

	if (Client_Conn(target) > NONE) {
		/* The target user is local, so we have to send the status code */
		if (!IRC_WriteStrClientPrefix(from, target, RPL_INVITING_MSG,
					       Client_ID(from), Req->argv[0],
					       colon_if_necessary, Req->argv[1]))
			return DISCONNECTED;

		if (Client_HasMode(target, 'a') &&
			!IRC_WriteStrClient(from, RPL_AWAY_MSG, Client_ID(from),
					Client_ID(target), Client_Away(target)))
				return DISCONNECTED;
	}
	return CONNECTED;
} /* IRC_INVITE */
コード例 #17
0
ファイル: irc.c プロジェクト: ngircd/ngircd
/*
 * Handler for the IRC "TRACE" 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_TRACE(CLIENT *Client, REQUEST *Req)
{
	CLIENT *from, *target, *c;
	CONN_ID idx, idx2;
	char user[CLIENT_USER_LEN];

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

	_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)
	_IRC_GET_TARGET_SERVER_OR_RETURN_(target, Req, 0, from)

	/* Forward command to other server? */
	if (target != Client_ThisServer()) {
		/* Send RPL_TRACELINK back to initiator */
		idx = Client_Conn(Client);
		assert(idx > NONE);
		idx2 = Client_Conn(Client_NextHop(target));
		assert(idx2 > NONE);

		if (!IRC_WriteStrClient(from, RPL_TRACELINK_MSG,
					Client_ID(from), PACKAGE_NAME,
					PACKAGE_VERSION, Client_ID(target),
					Client_ID(Client_NextHop(target)),
					Option_String(idx2),
					(long)(time(NULL) - Conn_StartTime(idx2)),
					Conn_SendQ(idx), Conn_SendQ(idx2)))
			return DISCONNECTED;

		/* Forward command */
		IRC_WriteStrClientPrefix(target, from, "TRACE %s", Req->argv[0]);
		return CONNECTED;
	}

	/* Infos about all connected servers */
	c = Client_First();
	while (c) {
		if (Client_Conn(c) > NONE) {
			/* Local client */
			if (Client_Type(c) == CLIENT_SERVER) {
				/* Server link */
				strlcpy(user, Client_User(c), sizeof(user));
				if (user[0] == '~')
					strlcpy(user, "unknown", sizeof(user));
				if (!IRC_WriteStrClient(from,
						RPL_TRACESERVER_MSG,
						Client_ID(from), Client_ID(c),
						user, Client_Hostname(c),
						Client_Mask(Client_ThisServer()),
						Option_String(Client_Conn(c))))
					return DISCONNECTED;
			}
			if (Client_Type(c) == CLIENT_USER
			    && Client_HasMode(c, 'o')) {
				/* IRC Operator */
				if (!IRC_WriteStrClient(from,
						RPL_TRACEOPERATOR_MSG,
						Client_ID(from), Client_ID(c)))
					return DISCONNECTED;
			}
		}
		c = Client_Next( c );
	}

	return IRC_WriteStrClient(from, RPL_TRACEEND_MSG, Client_ID(from),
				  Conf_ServerName, PACKAGE_NAME,
				  PACKAGE_VERSION, NGIRCd_DebugLevel);
} /* IRC_TRACE */
コード例 #18
0
ファイル: irc-mode.c プロジェクト: LucentW/ngircd
/**
 * 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 */
コード例 #19
0
ファイル: irc.c プロジェクト: 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 */
コード例 #20
0
ファイル: irc.c プロジェクト: mguindin/ngircd
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;

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

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

	/* 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_HostnameCloaked(cl)) == 0)
						break;
					else
						continue;
				}
				if (strcasecmp(user, Client_User(cl)) != 0)
					continue;
				if (host != NULL && strcasecmp(host,
						Client_HostnameCloaked(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_WriteStrClient(
				    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, '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_WriteStrClient(
					    from, ERR_NOTONSAMECHANNEL_MSG,
					    Client_ID(from), Client_ID(cl)))
						return DISCONNECTED;
					goto send_next_target;
				}
			}

			if (SendErrors && (Client_Type(Client) != CLIENT_SERVER)
			    && strchr(Client_Modes(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),
						      Req->argv[1]))
				return DISCONNECTED;
		} else if (ForceType != CLIENT_SERVICE
			   && (chan = Channel_Search(currentTarget))) {
			if (!Channel_Write(chan, from, Client, Req->command,
					   SendErrors, Req->argv[1]))
					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,
					       Req->argv[1], SendErrors))
				return DISCONNECTED;
		} else {
			if (!SendErrors)
				return CONNECTED;
			if (!IRC_WriteStrClient(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 (strchr(Client_Modes(from), 'o') == NULL) {
		if (!SendErrors)
			return true;
		return IRC_WriteStrClient(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_WriteStrClient(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 */
コード例 #21
0
ファイル: irc-login.c プロジェクト: husemann/ngircd
/**
 * Handler for the IRC "NICK" command.
 *
 * See RFC 2812, 3.1.2 "Nick message", and RFC 2813, 4.1.3 "Nick".
 *
 * This function implements the IRC command "NICK" which is used to register
 * with the server, to change already registered nicknames and to introduce
 * new users which are connected to other servers.
 *
 * @param Client	The client from which this command has been received.
 * @param Req		Request structure with prefix and all parameters.
 * @returns		CONNECTED or DISCONNECTED.
 */
GLOBAL bool
IRC_NICK( CLIENT *Client, REQUEST *Req )
{
	CLIENT *intr_c, *target, *c;
	char *nick, *user, *hostname, *modes, *info;
	int token, hops;

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

	/* Some IRC clients, for example BitchX, send the NICK and USER
	 * commands in the wrong order ... */
	if(Client_Type(Client) == CLIENT_UNKNOWN
	    || Client_Type(Client) == CLIENT_GOTPASS
	    || Client_Type(Client) == CLIENT_GOTNICK
#ifndef STRICT_RFC
	    || Client_Type(Client) == CLIENT_GOTUSER
#endif
	    || Client_Type(Client) == CLIENT_USER
	    || Client_Type(Client) == CLIENT_SERVICE
	    || (Client_Type(Client) == CLIENT_SERVER && Req->argc == 1))
	{
		/* User registration or change of nickname */

		/* Wrong number of arguments? */
		if( Req->argc != 1 )
			return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
						   Client_ID( Client ),
						   Req->command );

		/* Search "target" client */
		if( Client_Type( Client ) == CLIENT_SERVER )
		{
			target = Client_Search( Req->prefix );
			if( ! target )
				return IRC_WriteStrClient( Client,
							   ERR_NOSUCHNICK_MSG,
							   Client_ID( Client ),
							   Req->argv[0] );
		}
		else
		{
			/* Is this a restricted client? */
			if( Client_HasMode( Client, 'r' ))
				return IRC_WriteStrClient( Client,
							   ERR_RESTRICTED_MSG,
							   Client_ID( Client ));

			target = Client;
		}

#ifndef STRICT_RFC
		/* If the clients tries to change to its own nickname we won't
		 * do anything. This is how the original ircd behaves and some
		 * clients (for example Snak) expect it to be like this.
		 * But I doubt that this is "really the right thing" ... */
		if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 )
			return CONNECTED;
#endif

		/* Check that the new nickname is available. Special case:
		 * the client only changes from/to upper to lower case. */
		if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 )
		{
			if( ! Client_CheckNick( target, Req->argv[0] ))
				return CONNECTED;
		}

		if (Client_Type(target) != CLIENT_USER &&
		    Client_Type(target) != CLIENT_SERVICE &&
		    Client_Type(target) != CLIENT_SERVER) {
			/* New client */
			LogDebug("Connection %d: got valid NICK command ...",
			     Client_Conn( Client ));

			/* Register new nickname of this client */
			Client_SetID( target, Req->argv[0] );

#ifndef STRICT_RFC
			if (Conf_AuthPing) {
				Conn_SetAuthPing(Client_Conn(Client), rand());
				IRC_WriteStrClient(Client, "PING :%ld",
					Conn_GetAuthPing(Client_Conn(Client)));
				LogDebug("Connection %d: sent AUTH PING %ld ...",
					Client_Conn(Client),
					Conn_GetAuthPing(Client_Conn(Client)));
			}
#endif

			/* If we received a valid USER command already then
			 * register the new client! */
			if( Client_Type( Client ) == CLIENT_GOTUSER )
				return Login_User( Client );
			else
				Client_SetType( Client, CLIENT_GOTNICK );
		} else {
			/* Nickname change */
			if (Client_Conn(target) > NONE) {
				/* Local client */
				Log(LOG_INFO,
				    "%s \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".",
				    Client_TypeText(target), Client_Mask(target),
				    Client_Conn(target), Client_ID(target),
				    Req->argv[0]);
				Conn_UpdateIdle(Client_Conn(target));
			} else {
				/* Remote client */
				LogDebug("%s \"%s\" changed nick: \"%s\" -> \"%s\".",
					 Client_TypeText(target),
					 Client_Mask(target), Client_ID(target),
					 Req->argv[0]);
			}

			/* Inform all users and servers (which have to know)
			 * of this nickname change */
			if( Client_Type( Client ) == CLIENT_USER )
				IRC_WriteStrClientPrefix( Client, Client,
							  "NICK :%s",
							  Req->argv[0] );
			IRC_WriteStrServersPrefix( Client, target,
						   "NICK :%s", Req->argv[0] );
			IRC_WriteStrRelatedPrefix( target, target, false,
						   "NICK :%s", Req->argv[0] );

			/* Register old nickname for WHOWAS queries */
			Client_RegisterWhowas( target );

			/* Save new nickname */
			Client_SetID( target, Req->argv[0] );

			IRC_SetPenalty( target, 2 );
		}

		return CONNECTED;
	} else if(Client_Type(Client) == CLIENT_SERVER ||
		  Client_Type(Client) == CLIENT_SERVICE) {
		/* Server or service introduces new client */

		/* Bad number of parameters? */
		if (Req->argc != 2 && Req->argc != 7)
			return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
						  Client_ID(Client), Req->command);

		if (Req->argc >= 7) {
			/* RFC 2813 compatible syntax */
			nick = Req->argv[0];
			hops = atoi(Req->argv[1]);
			user = Req->argv[2];
			hostname = Req->argv[3];
			token = atoi(Req->argv[4]);
			modes = Req->argv[5] + 1;
			info = Req->argv[6];
		} else {
			/* RFC 1459 compatible syntax */
			nick = Req->argv[0];
			hops = 1;
			user = Req->argv[0];
			hostname = Client_ID(Client);
			token = atoi(Req->argv[1]);
			modes = "";
			info = Req->argv[0];
		}

		c = Client_Search(nick);
		if(c) {
			/*
			 * the new nick is already present on this server:
			 * the new and the old one have to be disconnected now.
			 */
			Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] );
			Kill_Nick( Req->argv[0], "Nick collision" );
			return CONNECTED;
		}

		/* Find the Server this client is connected to */
		intr_c = Client_GetFromToken(Client, token);
		if( ! intr_c )
		{
			Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] );
			Kill_Nick( Req->argv[0], "Unknown server" );
			return CONNECTED;
		}

		c = Client_NewRemoteUser(intr_c, nick, hops, user, hostname,
					 token, modes, info, true);
		if( ! c )
		{
			/* out of memory, need to disconnect client to keep network state consistent */
			Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client ));
			Kill_Nick( Req->argv[0], "Server error" );
			return CONNECTED;
		}

		/* RFC 2813: client is now fully registered, inform all the
		 * other servers about the new user.
		 * RFC 1459: announce the new client only after receiving the
		 * USER command, first we need more information! */
		if (Req->argc < 7) {
			LogDebug("Client \"%s\" is being registered (RFC 1459) ...",
				 Client_Mask(c));
			Client_SetType(c, CLIENT_GOTNICK);
		} else
			Client_Introduce(Client, c, CLIENT_USER);

		return CONNECTED;
	}
	else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client ));
} /* IRC_NICK */