示例#1
0
文件: channel.c 项目: Flupsy/ngircd
/**
 * Generate predefined persistent channels and &SERVER
 */
GLOBAL void
Channel_InitPredefined( void )
{
	CHANNEL *new_chan;
	const struct Conf_Channel *conf_chan;
	const char *c;
	size_t i, channel_count = array_length(&Conf_Channels, sizeof(*conf_chan));

	conf_chan = array_start(&Conf_Channels);

	assert(channel_count == 0 || conf_chan != NULL);

	for (i = 0; i < channel_count; i++, conf_chan++) {
		if (!conf_chan->name[0])
			continue;
		if (!Channel_IsValidName(conf_chan->name)) {
			Log(LOG_ERR,
			    "Can't create pre-defined channel: invalid name: \"%s\"",
			    conf_chan->name);
			continue;
		}

		new_chan = Channel_Search(conf_chan->name);
		if (new_chan) {
			Log(LOG_INFO,
			    "Can't create pre-defined channel \"%s\": name already in use.",
			    conf_chan->name);
			Set_KeyFile(new_chan, conf_chan->keyfile);
			continue;
		}

		new_chan = Channel_Create(conf_chan->name);
		if (!new_chan) {
			Log(LOG_ERR, "Can't create pre-defined channel \"%s\"!",
							conf_chan->name);
			continue;
		}
		Log(LOG_INFO, "Created pre-defined channel \"%s\".",
						conf_chan->name);

		Channel_ModeAdd(new_chan, 'P');

		if (conf_chan->topic[0])
			Channel_SetTopic(new_chan, NULL, conf_chan->topic);

		c = conf_chan->modes;
		while (*c)
			Channel_ModeAdd(new_chan, *c++);

		Channel_SetKey(new_chan, conf_chan->key);
		Channel_SetMaxUsers(new_chan, conf_chan->maxusers);
		Set_KeyFile(new_chan, conf_chan->keyfile);
	}
	if (channel_count)
		array_free(&Conf_Channels);

	/* Make sure the local &SERVER channel exists */
	if (!Channel_Search("&SERVER")) {
		new_chan = Channel_Create("&SERVER");
		if (new_chan) {
			Channel_SetModes(new_chan, "mnPt");
			Channel_SetTopic(new_chan, Client_ThisServer(),
					 "Server Messages");
		} else
			Log(LOG_ERR, "Failed to create \"&SERVER\" channel!");
	} else
		LogDebug("Required channel \"&SERVER\" already exists, ok.");
} /* Channel_InitPredefined */
示例#2
0
文件: irc-mode.c 项目: 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 */
示例#3
0
/**
 * Handler for the IRC+ "CHANINFO" command.
 *
 * @param Client The client from which this command has been received.
 * @param Req Request structure with prefix and all parameters.
 * @return CONNECTED or DISCONNECTED.
 */
GLOBAL bool
IRC_CHANINFO( CLIENT *Client, REQUEST *Req )
{
	char modes_add[COMMAND_LEN], l[16];
	CLIENT *from;
	CHANNEL *chan;
	int arg_topic;

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

	/* Bad number of parameters? */
	if (Req->argc < 2 || Req->argc == 4 || Req->argc > 5)
		return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
					  Client_ID(Client), Req->command);

	/* Compatibility kludge */
	if (Req->argc == 5)
		arg_topic = 4;
	else if(Req->argc == 3)
		arg_topic = 2;
	else
		arg_topic = -1;

	_IRC_GET_SENDER_OR_RETURN_(from, Req, Client)

	/* Search or create channel */
	chan = Channel_Search( Req->argv[0] );
	if (!chan)
		chan = Channel_Create( Req->argv[0] );
	if (!chan)
		return CONNECTED;

	if (Req->argv[1][0] == '+') {
		if (!*Channel_Modes(chan)) {
			/* OK, this channel doesn't have modes yet,
			 * set the received ones: */
			Channel_SetModes(chan, &Req->argv[1][1]);

			if(Req->argc == 5) {
				if(Channel_HasMode(chan, 'k'))
					Channel_SetKey(chan, Req->argv[2]);
				if(Channel_HasMode(chan, 'l'))
					Channel_SetMaxUsers(chan, atol(Req->argv[3]));
			} else {
				/* Delete modes which we never want to inherit */
				Channel_ModeDel(chan, 'l');
				Channel_ModeDel(chan, 'k');
			}

			strcpy(modes_add, "");
			if (Channel_HasMode(chan, 'l'))  {
				snprintf(l, sizeof(l), " %lu",
					 Channel_MaxUsers(chan));
				strlcat(modes_add, l, sizeof(modes_add));
			}
			if (Channel_HasMode(chan, 'k'))  {
				strlcat(modes_add, " ", sizeof(modes_add));
				strlcat(modes_add, Channel_Key(chan),
					sizeof(modes_add));
			}

			/* Inform members of this channel */
			IRC_WriteStrChannelPrefix(Client, chan, from, false,
						  "MODE %s +%s%s", Req->argv[0],
						  Channel_Modes(chan), modes_add);
		}
	}
	else
		Log(LOG_WARNING, "CHANINFO: invalid MODE format ignored!");

	if (arg_topic > 0) {
		/* We got a topic */
		if (!*Channel_Topic(chan) && Req->argv[arg_topic][0]) {
			/* OK, there is no topic jet */
			Channel_SetTopic(chan, Client, Req->argv[arg_topic]);
			IRC_WriteStrChannelPrefix(Client, chan, from, false,
			     "TOPIC %s :%s", Req->argv[0], Channel_Topic(chan));
		}
	}

	/* Forward CHANINFO to other servers */
	if (Req->argc == 5)
		IRC_WriteStrServersPrefixFlag(Client, from, 'C',
					      "CHANINFO %s %s %s %s :%s",
					      Req->argv[0], Req->argv[1],
					      Req->argv[2], Req->argv[3],
					      Req->argv[4]);
	else if (Req->argc == 3)
		IRC_WriteStrServersPrefixFlag(Client, from, 'C',
					      "CHANINFO %s %s :%s",
					      Req->argv[0], Req->argv[1],
					      Req->argv[2]);
	else
		IRC_WriteStrServersPrefixFlag(Client, from, 'C',
					      "CHANINFO %s %s",
					      Req->argv[0], Req->argv[1]);

	return CONNECTED;
} /* IRC_CHANINFO */