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- /*
- * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2014 Alexander Barton (alex@barton.de) and Contributors.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- * Please read the file COPYING, README and AUTHORS for more information.
- */
- #include "portab.h"
- /**
- * @file
- * IRC commands for mode changes (like MODE, AWAY, etc.)
- */
- #include <assert.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "conn.h"
- #include "channel.h"
- #include "irc-macros.h"
- #include "irc-write.h"
- #include "lists.h"
- #include "log.h"
- #include "parse.h"
- #include "messages.h"
- #include "conf.h"
- #include "irc-mode.h"
- static bool Client_Mode PARAMS((CLIENT *Client, REQUEST *Req, CLIENT *Origin,
- CLIENT *Target));
- static bool Channel_Mode PARAMS((CLIENT *Client, REQUEST *Req, CLIENT *Origin,
- CHANNEL *Channel));
- static bool Add_To_List PARAMS((char what, CLIENT *Prefix, CLIENT *Client,
- CHANNEL *Channel, const char *Pattern));
- static bool Del_From_List PARAMS((char what, CLIENT *Prefix, CLIENT *Client,
- CHANNEL *Channel, const char *Pattern));
- static bool Send_ListChange PARAMS((const bool IsAdd, const char ModeChar,
- CLIENT *Prefix, CLIENT *Client,
- CHANNEL *Channel, const char *Mask));
- /**
- * Handler for the IRC "MODE" command.
- *
- * This function detects whether user or channel modes should be modified
- * and calls the appropriate sub-functions.
- *
- * @param Client The client from which this command has been received.
- * @param Req Request structure with prefix and all parameters.
- * @return CONNECTED or DISCONNECTED.
- */
- GLOBAL bool
- IRC_MODE( CLIENT *Client, REQUEST *Req )
- {
- CLIENT *cl, *origin;
- CHANNEL *chan;
- assert(Client != NULL);
- assert(Req != NULL);
- _IRC_GET_SENDER_OR_RETURN_(origin, Req, Client)
- /* Test for "fake" MODE commands injected by this local instance,
- * for example when handling the "DefaultUserModes" settings.
- * This doesn't harm real commands, because prefixes of regular
- * clients are checked in Validate_Prefix() and can't be faked. */
- if (Req->prefix && Client_Search(Req->prefix) == Client_ThisServer())
- Client = Client_Search(Req->prefix);
- /* Channel or user mode? */
- cl = NULL; chan = NULL;
- if (Client_IsValidNick(Req->argv[0]))
- cl = Client_Search(Req->argv[0]);
- if (Channel_IsValidName(Req->argv[0]))
- chan = Channel_Search(Req->argv[0]);
- if (cl)
- return Client_Mode(Client, Req, origin, cl);
- if (chan)
- return Channel_Mode(Client, Req, origin, chan);
- /* No target found! */
- return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
- Client_ID(Client), Req->argv[0]);
- } /* IRC_MODE */
- /**
- * Check if the "mode limit" for a client has been reached.
- *
- * This limit doesn't apply for servers or services!
- *
- * @param Client The client to check.
- * @param Count The number of modes already handled.
- * @return true if the limit has been reached.
- */
- static bool
- Mode_Limit_Reached(CLIENT *Client, int Count)
- {
- if (Client_Type(Client) == CLIENT_SERVER
- || Client_Type(Client) == CLIENT_SERVICE)
- return false;
- if (Count < MAX_HNDL_MODES_ARG)
- return false;
- return true;
- }
- /**
- * Handle client mode requests
- *
- * @param Client The client from which this command has been received.
- * @param Req Request structure with prefix and all parameters.
- * @param Origin The originator of the MODE command (prefix).
- * @param Target The target (client) of this MODE command.
- * @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 '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 */
- /*
- * Reply to a channel mode request.
- *
- * @param Origin The originator of the MODE command (prefix).
- * @param Channel The channel of which the modes should be sent.
- * @return CONNECTED or DISCONNECTED.
- */
- static bool
- Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
- {
- char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
- const char *mode_ptr;
- /* Member or not? -- That's the question! */
- if (!Channel_IsMemberOf(Channel, Origin))
- return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
- Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
- /* The sender is a member: generate extended reply */
- strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
- mode_ptr = the_modes;
- the_args[0] = '\0';
- while(*mode_ptr) {
- switch(*mode_ptr) {
- case 'l':
- snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
- strlcat(the_args, argadd, sizeof(the_args));
- break;
- case 'k':
- strlcat(the_args, " ", sizeof(the_args));
- strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
- break;
- }
- mode_ptr++;
- }
- if (the_args[0])
- strlcat(the_modes, the_args, sizeof(the_modes));
- if (!IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
- Client_ID(Origin), Channel_Name(Channel),
- the_modes))
- return DISCONNECTED;
- #ifndef STRICT_RFC
- if (!IRC_WriteStrClient(Origin, RPL_CREATIONTIME_MSG,
- Client_ID(Origin), Channel_Name(Channel),
- Channel_CreationTime(Channel)))
- return DISCONNECTED;
- #endif
- return CONNECTED;
- }
- /**
- * Handle channel mode and channel-user mode changes
- *
- * @param Client The client from which this command has been received.
- * @param Req Request structure with prefix and all parameters.
- * @param Origin The originator of the MODE command (prefix).
- * @param Channel The target channel of this MODE command.
- * @return CONNECTED or DISCONNECTED.
- */
- static bool
- Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
- {
- 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 '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 */
- /**
- * Handler for the IRC "AWAY" command.
- *
- * @param Client The client from which this command has been received.
- * @param Req Request structure with prefix and all parameters.
- * @return CONNECTED or DISCONNECTED.
- */
- GLOBAL bool
- IRC_AWAY( CLIENT *Client, REQUEST *Req )
- {
- assert (Client != NULL);
- assert (Req != NULL);
- if (Req->argc == 1 && Req->argv[0][0]) {
- Client_SetAway(Client, Req->argv[0]);
- Client_ModeAdd(Client, 'a');
- IRC_WriteStrServersPrefix(Client, Client, "MODE %s :+a",
- Client_ID( Client));
- return IRC_WriteStrClient(Client, RPL_NOWAWAY_MSG,
- Client_ID( Client));
- } else {
- Client_ModeDel(Client, 'a');
- IRC_WriteStrServersPrefix(Client, Client, "MODE %s :-a",
- Client_ID( Client));
- return IRC_WriteStrClient(Client, RPL_UNAWAY_MSG,
- Client_ID( Client));
- }
- } /* IRC_AWAY */
- /**
- * Add entries to channel invite, ban and exception lists.
- *
- * @param what Can be 'I' for invite, 'b' for ban, and 'e' for exception list.
- * @param Prefix The originator of the command.
- * @param Client The sender of the command.
- * @param Channel The channel of which the list should be modified.
- * @param Pattern The pattern to add to the list.
- * @return CONNECTED or DISCONNECTED.
- */
- static bool
- Add_To_List(char what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel,
- const char *Pattern)
- {
- char mask[MASK_LEN];
- struct list_head *list = NULL;
- long int current_count;
- assert(Client != NULL);
- assert(Channel != NULL);
- assert(Pattern != NULL);
- assert(what == 'I' || what == 'b' || what == 'e');
- Lists_MakeMask(Pattern, mask, sizeof(mask));
- current_count = Lists_Count(Channel_GetListInvites(Channel))
- + Lists_Count(Channel_GetListExcepts(Channel))
- + Lists_Count(Channel_GetListBans(Channel));
- switch(what) {
- case 'I':
- list = Channel_GetListInvites(Channel);
- break;
- case 'b':
- list = Channel_GetListBans(Channel);
- break;
- case 'e':
- list = Channel_GetListExcepts(Channel);
- break;
- }
- if (Lists_CheckDupeMask(list, mask))
- return CONNECTED;
- if (Client_Type(Client) == CLIENT_USER &&
- current_count >= MAX_HNDL_CHANNEL_LISTS)
- return IRC_WriteErrClient(Client, ERR_LISTFULL_MSG,
- Client_ID(Client),
- Channel_Name(Channel), mask,
- MAX_HNDL_CHANNEL_LISTS);
- switch (what) {
- case 'I':
- if (!Channel_AddInvite(Channel, mask, false))
- return CONNECTED;
- break;
- case 'b':
- if (!Channel_AddBan(Channel, mask))
- return CONNECTED;
- break;
- case 'e':
- if (!Channel_AddExcept(Channel, mask))
- return CONNECTED;
- break;
- }
- return Send_ListChange(true, what, Prefix, Client, Channel, mask);
- }
- /**
- * Delete entries from channel invite, ban and exception lists.
- *
- * @param what Can be 'I' for invite, 'b' for ban, and 'e' for exception list.
- * @param Prefix The originator of the command.
- * @param Client The sender of the command.
- * @param Channel The channel of which the list should be modified.
- * @param Pattern The pattern to add to the list.
- * @return CONNECTED or DISCONNECTED.
- */
- static bool
- Del_From_List(char what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel,
- const char *Pattern)
- {
- char mask[MASK_LEN];
- struct list_head *list = NULL;
- assert(Client != NULL);
- assert(Channel != NULL);
- assert(Pattern != NULL);
- assert(what == 'I' || what == 'b' || what == 'e');
- Lists_MakeMask(Pattern, mask, sizeof(mask));
- switch (what) {
- case 'I':
- list = Channel_GetListInvites(Channel);
- break;
- case 'b':
- list = Channel_GetListBans(Channel);
- break;
- case 'e':
- list = Channel_GetListExcepts(Channel);
- break;
- }
- if (!Lists_CheckDupeMask(list, mask))
- return CONNECTED;
- Lists_Del(list, mask);
- return Send_ListChange(false, what, Prefix, Client, Channel, mask);
- }
- /**
- * Send information about changed channel invite/ban/exception lists to clients.
- *
- * @param IsAdd true if the list item has been added, false otherwise.
- * @param ModeChar The mode to use (e. g. 'b' or 'I')
- * @param Prefix The originator of the mode list change.
- * @param Client The sender of the command.
- * @param Channel The channel of which the list has been modified.
- * @param Mask The mask which has been added or removed.
- * @return CONNECTED or DISCONNECTED.
- */
- static bool
- Send_ListChange(const bool IsAdd, const char ModeChar, CLIENT *Prefix,
- CLIENT *Client, CHANNEL *Channel, const char *Mask)
- {
- bool ok = true;
- /* Send confirmation to the client */
- if (Client_Type(Client) == CLIENT_USER)
- ok = IRC_WriteStrClientPrefix(Client, Prefix, "MODE %s %c%c %s",
- Channel_Name(Channel),
- IsAdd ? '+' : '-',
- ModeChar, Mask);
- /* to other servers */
- IRC_WriteStrServersPrefix(Client, Prefix, "MODE %s %c%c %s",
- Channel_Name(Channel), IsAdd ? '+' : '-',
- ModeChar, Mask);
- /* and local users in channel */
- IRC_WriteStrChannelPrefix(Client, Channel, Prefix, false,
- "MODE %s %c%c %s", Channel_Name(Channel),
- IsAdd ? '+' : '-', ModeChar, Mask );
- return ok;
- } /* Send_ListChange */
- /* -eof- */
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