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ngircd-tor/src/ngircd/irc-mode.c

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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;
if (!Channel_IsMemberOf(Channel, Origin)) {
/* Not a member: "simple" mode reply */
if (!IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
Client_ID(Origin), Channel_Name(Channel),
Channel_Modes(Channel)))
return DISCONNECTED;
} else {
/* 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
/* Channel creation time */
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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