diff options
Diffstat (limited to 'src/mode.cpp')
| -rw-r--r-- | src/mode.cpp | 1067 |
1 files changed, 1066 insertions, 1 deletions
diff --git a/src/mode.cpp b/src/mode.cpp index cfb009273..db120cfe5 100644 --- a/src/mode.cpp +++ b/src/mode.cpp @@ -1 +1,1066 @@ -/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2007 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "users.h"
#include "modules.h"
#include "inspstring.h"
#include "mode.h"
/* +s (secret) */
#include "modes/cmode_s.h"
/* +p (private) */
#include "modes/cmode_p.h"
/* +b (bans) */
#include "modes/cmode_b.h"
/* +m (moderated) */
#include "modes/cmode_m.h"
/* +t (only (half) ops can change topic) */
#include "modes/cmode_t.h"
/* +n (no external messages) */
#include "modes/cmode_n.h"
/* +i (invite only) */
#include "modes/cmode_i.h"
/* +k (keyed channel) */
#include "modes/cmode_k.h"
/* +l (channel user limit) */
#include "modes/cmode_l.h"
/* +o (channel op) */
#include "modes/cmode_o.h"
/* +h (channel halfop) */
#include "modes/cmode_h.h"
/* +v (channel voice) */
#include "modes/cmode_v.h"
/* +s (server notices) */
#include "modes/umode_s.h"
/* +w (see wallops) */
#include "modes/umode_w.h"
/* +i (invisible) */
#include "modes/umode_i.h"
/* +o (operator) */
#include "modes/umode_o.h"
/* +n (notice mask - our implementation of snomasks) */
#include "modes/umode_n.h"
ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix)
: ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), oper(operonly), prefix(mprefix), count(0)
{
}
ModeHandler::~ModeHandler()
{
}
bool ModeHandler::IsListMode()
{
return list;
}
unsigned int ModeHandler::GetPrefixRank()
{
return 0;
}
unsigned int ModeHandler::GetCount()
{
return 0;
}
void ModeHandler::ChangeCount(int modifier)
{
count += modifier;
}
ModeType ModeHandler::GetModeType()
{
return m_type;
}
bool ModeHandler::NeedsOper()
{
return oper;
}
char ModeHandler::GetPrefix()
{
return prefix;
}
int ModeHandler::GetNumParams(bool adding)
{
return adding ? n_params_on : n_params_off;
}
char ModeHandler::GetModeChar()
{
return mode;
}
ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding)
{
return MODEACTION_DENY;
}
ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter)
{
if (dest)
{
return std::make_pair(dest->IsModeSet(this->mode), "");
}
else
{
return std::make_pair(channel->IsModeSet(this->mode), "");
}
}
void ModeHandler::DisplayList(userrec* user, chanrec* channel)
{
}
bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
{
return (ours < theirs);
}
ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type)
{
}
ModeWatcher::~ModeWatcher()
{
}
char ModeWatcher::GetModeChar()
{
return mode;
}
ModeType ModeWatcher::GetModeType()
{
return m_type;
}
bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding, ModeType type)
{
return true;
}
void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter, bool adding, ModeType type)
{
}
userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status)
{
userrec *d;
if ((!user) || (!dest) || (!chan) || (!*dest))
{
return NULL;
}
d = ServerInstance->FindNick(dest);
if (!d)
{
user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest);
return NULL;
}
return d;
}
const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK)
{
if (!chan)
return "";
UCListIter n = d->chans.find(chan);
if (n != d->chans.end())
{
if (n->second & MASK)
{
return "";
}
n->second = n->second | MASK;
switch (MASK)
{
case UCMODE_OP:
n->first->AddOppedUser(d);
break;
case UCMODE_HOP:
n->first->AddHalfoppedUser(d);
break;
case UCMODE_VOICE:
n->first->AddVoicedUser(d);
break;
}
return d->nick;
}
return "";
}
const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
{
if (!chan)
return "";
UCListIter n = d->chans.find(chan);
if (n != d->chans.end())
{
if ((n->second & MASK) == 0)
{
return "";
}
n->second ^= MASK;
switch (MASK)
{
case UCMODE_OP:
n->first->DelOppedUser(d);
break;
case UCMODE_HOP:
n->first->DelHalfoppedUser(d);
break;
case UCMODE_VOICE:
n->first->DelVoicedUser(d);
break;
}
return d->nick;
}
return "";
}
void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
{
if (targetchannel)
{
/* Display channel's current mode string */
user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
user->WriteServ("329 %s %s %lu", user->nick, targetchannel->name, (unsigned long)targetchannel->age);
return;
}
else if (targetuser)
{
if (targetuser->Visibility && !targetuser->Visibility->VisibleTo(user))
{
user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
return;
}
if ((targetuser == user) || (IS_OPER(user)))
{
/* Display user's current mode string */
user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
if (IS_OPER(targetuser))
user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
return;
}
else
{
user->WriteServ("502 %s :Can't change mode for other users", user->nick);
return;
}
}
/* No such nick/channel */
user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
return;
}
void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
{
std::string target = parameters[0];
ModeType type = MODETYPE_USER;
unsigned char mask = 0;
chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
userrec* targetuser = ServerInstance->FindNick(parameters[0]);
LastParse.clear();
/* Special case for displaying the list for listmodes,
* e.g. MODE #chan b, or MODE #chan +b without a parameter
*/
if ((targetchannel) && (pcnt == 2))
{
const char* mode = parameters[1];
int nonlistmodes_found = 0;
bool sent[256];
mask = MASK_CHANNEL;
memset(&sent, 0, 256);
while (mode && *mode)
{
unsigned char mletter = *mode;
if (*mode == '+')
{
mode++;
continue;
}
/* Ensure the user doesnt request the same mode twice,
* so they cant flood themselves off out of idiocy.
*/
if (!sent[mletter])
{
sent[mletter] = true;
}
else
{
mode++;
continue;
}
ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL);
bool display = true;
if ((mh) && (mh->IsListMode()))
{
if (ServerInstance->Config->HideModeLists[mletter] && (targetchannel->GetStatus(user) < STATUS_HOP))
{
user->WriteServ("482 %s %s :Only half-operators and above may view the +%c list",user->nick, targetchannel->name, *mode++);
continue;
}
/** See below for a description of what craq this is :D
*/
unsigned char handler_id = (*mode - 65) | mask;
for(ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
{
std::string dummyparam;
if (!((*watchers)->BeforeMode(user, NULL, targetchannel, dummyparam, true, MODETYPE_CHANNEL)))
display = false;
}
if (display)
mh->DisplayList(user, targetchannel);
}
else
nonlistmodes_found++;
mode++;
}
/* We didnt have any modes that were non-list, we can return here */
if (!nonlistmodes_found)
return;
}
if (pcnt == 1)
{
this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
}
else if (pcnt > 1)
{
if (targetchannel)
{
type = MODETYPE_CHANNEL;
mask = MASK_CHANNEL;
/* Extra security checks on channel modes
* (e.g. are they a (half)op?
*/
if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
{
/* We don't have halfop */
int MOD_RESULT = 0;
FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE));
if (MOD_RESULT == ACR_DENY)
return;
if (MOD_RESULT == ACR_DEFAULT)
{
/* Are we a uline or is it a servermode? */
if ((!ServerInstance->ULine(user->server)) && (!servermode))
{
/* Not enough permission:
* NOT a uline and NOT a servermode,
* OR, NOT halfop or above.
*/
user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
return;
}
}
}
}
else if (targetuser)
{
type = MODETYPE_USER;
mask = MASK_USER;
if ((user != targetuser) && (!ServerInstance->ULine(user->server)))
{
user->WriteServ("502 %s :Can't change mode for other users", user->nick);
return;
}
}
else
{
/* No such nick/channel */
user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
return;
}
std::string mode_sequence = parameters[1];
std::string parameter;
std::ostringstream parameter_list;
std::string output_sequence;
bool adding = true, state_change = false;
unsigned char handler_id = 0;
int parameter_counter = 2; /* Index of first parameter */
int parameter_count = 0;
bool last_successful_state_change = false;
/* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
mode_sequence.insert(0, "+");
for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
{
unsigned char modechar = *letter;
switch (modechar)
{
/* NB:
* For + and - mode characters, we don't just stick the character into the output sequence.
* This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
* appearing in the output sequence, we store a flag which says there was a state change,
* which is set on any + or -, however, the + or - that we finish on is only appended to
* the output stream in the event it is followed by a non "+ or -" character, such as o or v.
*/
case '+':
/* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
* however, will allow the + if it is the first item in the sequence, regardless.
*/
if ((!adding) || (!output_sequence.length()))
state_change = true;
adding = true;
if (!output_sequence.length())
last_successful_state_change = false;
continue;
break;
case '-':
if ((adding) || (!output_sequence.length()))
state_change = true;
adding = false;
if (!output_sequence.length())
last_successful_state_change = true;
continue;
break;
default:
/**
* Watch carefully for the sleight of hand trick.
* 65 is the ascii value of 'A'. We take this from
* the char we're looking at to get a number between
* 1 and 127. We then logic-or it to get the hashed
* position, dependent on wether its a channel or
* a user mode. This is a little stranger, but a lot
* faster, than using a map of pairs.
*/
handler_id = (modechar - 65) | mask;
if (modehandlers[handler_id])
{
bool abort = false;
if (modehandlers[handler_id]->GetModeType() == type)
{
if (modehandlers[handler_id]->GetNumParams(adding))
{
/* This mode expects a parameter, do we have any parameters left in our list to use? */
if (parameter_counter < pcnt)
{
parameter = parameters[parameter_counter++];
/* Yerk, invalid! */
if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
parameter.clear();
}
else
{
/* No parameter, continue to the next mode */
continue;
}
bool had_parameter = !parameter.empty();
for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
{
if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false)
{
abort = true;
break;
}
/* A module whacked the parameter completely, and there was one. abort. */
if ((had_parameter) && (parameter.empty()))
{
abort = true;
break;
}
}
if (abort)
continue;
}
else
{
/* Fix by brain: mode watchers not being called for parameterless modes */
for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
{
if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false)
{
abort = true;
break;
}
}
if (abort)
continue;
}
/* It's an oper only mode, check if theyre an oper. If they arent,
* eat any parameter that came with the mode, and continue to next
*/
if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!IS_OPER(user)))
{
user->WriteServ("481 %s :Permission Denied - Only IRC operators may %sset %s mode %c", user->nick,
adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
modehandlers[handler_id]->GetModeChar());
continue;
}
/* Call the handler for the mode */
ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter.empty()))
{
/* The handler nuked the parameter and they are supposed to have one.
* We CANT continue now, even if they actually returned MODEACTION_ALLOW,
* so we bail to the next mode character.
*/
continue;
}
if (ma == MODEACTION_ALLOW)
{
/* We're about to output a valid mode letter - was there previously a pending state-change? */
if (state_change)
{
if (adding != last_successful_state_change)
output_sequence.append(adding ? "+" : "-");
last_successful_state_change = adding;
}
/* Add the mode letter */
output_sequence.push_back(modechar);
/* Is there a valid parameter for this mode? If so add it to the parameter list */
if ((modehandlers[handler_id]->GetNumParams(adding)) && (!parameter.empty()))
{
parameter_list << " " << parameter;
parameter_count++;
/* Does this mode have a prefix? */
if (modehandlers[handler_id]->GetPrefix() && targetchannel)
{
userrec* user_to_prefix = ServerInstance->FindNick(parameter);
if (user_to_prefix)
targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
modehandlers[handler_id]->GetPrefixRank(), adding);
}
}
/* Call all the AfterMode events in the mode watchers for this mode */
for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
(*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
/* Reset the state change flag */
state_change = false;
if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100)
|| (parameter_count > MAXMODES))
{
/* We cant have a mode sequence this long */
letter = mode_sequence.end() - 1;
continue;
}
}
}
}
else
{
/* No mode handler? Unknown mode character then. */
user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
}
break;
}
}
/* Was there at least one valid mode in the sequence? */
if (!output_sequence.empty())
{
if (servermode)
{
if (type == MODETYPE_CHANNEL)
{
targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
this->LastParse = targetchannel->name;
}
else
{
targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
this->LastParse = targetuser->nick;
}
}
else
{
if (type == MODETYPE_CHANNEL)
{
targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
this->LastParse = targetchannel->name;
}
else
{
user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str()));
this->LastParse = targetuser->nick;
}
}
LastParse.append(" ");
LastParse.append(output_sequence);
LastParse.append(parameter_list.str());
}
}
}
const std::string& ModeParser::GetLastParse()
{
return LastParse;
}
void ModeParser::CleanMask(std::string &mask)
{
std::string::size_type pos_of_pling = mask.find_first_of('!');
std::string::size_type pos_of_at = mask.find_first_of('@');
std::string::size_type pos_of_dot = mask.find_first_of('.');
std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
{
/* Just a nick, or just a host */
if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
{
/* It has no '.' in it, it must be a nick. */
mask.append("!*@*");
}
else
{
/* Got a dot in it? Has to be a host */
mask = "*!*@" + mask;
}
}
else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
{
/* Has an @ but no !, its a user@host */
mask = "*!" + mask;
}
else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
{
/* Has a ! but no @, it must be a nick!ident */
mask.append("@*");
}
}
bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
{
unsigned char mask = 0;
unsigned char pos = 0;
/* Yes, i know, this might let people declare modes like '_' or '^'.
* If they do that, thats their problem, and if i ever EVER see an
* official InspIRCd developer do that, i'll beat them with a paddle!
*/
if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z') || (mh->GetPrefix() > 126))
return false;
/* A mode prefix of ',' is not acceptable, it would fuck up server to server.
* A mode prefix of ':' will fuck up both server to server, and client to server.
* A mode prefix of '#' will mess up /whois and /privmsg
*/
if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#'))
return false;
mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
pos = (mh->GetModeChar()-65) | mask;
if (modehandlers[pos])
return false;
modehandlers[pos] = mh;
return true;
}
bool ModeParser::DelMode(ModeHandler* mh)
{
unsigned char mask = 0;
unsigned char pos = 0;
if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
return false;
mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
pos = (mh->GetModeChar()-65) | mask;
if (!modehandlers[pos])
return false;
switch (mh->GetModeType())
{
case MODETYPE_USER:
for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++)
{
mh->RemoveMode(i->second);
}
break;
case MODETYPE_CHANNEL:
for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
{
mh->RemoveMode(i->second);
}
break;
}
modehandlers[pos] = NULL;
return true;
}
ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
{
unsigned char mask = 0;
unsigned char pos = 0;
if ((modeletter < 'A') || (modeletter > 'z'))
return NULL;
mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
pos = (modeletter-65) | mask;
return modehandlers[pos];
}
std::string ModeParser::UserModeList()
{
char modestr[256];
int pointer = 0;
for (unsigned char mode = 'A'; mode <= 'z'; mode++)
{
unsigned char pos = (mode-65) | MASK_USER;
if (modehandlers[pos])
modestr[pointer++] = mode;
}
modestr[pointer++] = 0;
return modestr;
}
std::string ModeParser::ChannelModeList()
{
char modestr[256];
int pointer = 0;
for (unsigned char mode = 'A'; mode <= 'z'; mode++)
{
if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h'))
continue;
unsigned char pos = (mode-65) | MASK_CHANNEL;
if (modehandlers[pos])
modestr[pointer++] = mode;
}
modestr[pointer++] = 0;
return modestr;
}
std::string ModeParser::ParaModeList()
{
char modestr[256];
int pointer = 0;
for (unsigned char mode = 'A'; mode <= 'z'; mode++)
{
if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h'))
continue;
unsigned char pos = (mode-65) | MASK_CHANNEL;
if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
modestr[pointer++] = mode;
}
modestr[pointer++] = 0;
return modestr;
}
ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
{
for (unsigned char mode = 'A'; mode <= 'z'; mode++)
{
unsigned char pos = (mode-65) | MASK_CHANNEL;
if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
{
return modehandlers[pos];
}
}
return NULL;
}
std::string ModeParser::ModeString(userrec* user, chanrec* channel)
{
std::string types;
std::string pars;
if (!channel || !user)
return "";
for (unsigned char mode = 'A'; mode <= 'z'; mode++)
{
unsigned char pos = (mode-65) | MASK_CHANNEL;
ModeHandler* mh = modehandlers[pos];
if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
{
ModePair ret;
ret = mh->ModeSet(NULL, user, channel, user->nick);
if ((ret.first) && (ret.second == user->nick))
{
pars.append(" ");
pars.append(user->nick);
types.push_back(mh->GetModeChar());
}
}
}
return types+pars;
}
std::string ModeParser::ChanModes()
{
std::string type1; /* Listmodes EXCEPT those with a prefix */
std::string type2; /* Modes that take a param when adding or removing */
std::string type3; /* Modes that only take a param when adding */
std::string type4; /* Modes that dont take a param */
for (unsigned char mode = 'A'; mode <= 'z'; mode++)
{
if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h'))
continue;
unsigned char pos = (mode-65) | MASK_CHANNEL;
/* One parameter when adding */
if (modehandlers[pos])
{
if (modehandlers[pos]->GetNumParams(true))
{
if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
{
type1 += modehandlers[pos]->GetModeChar();
}
else
{
/* ... and one parameter when removing */
if (modehandlers[pos]->GetNumParams(false))
{
/* But not a list mode */
if (!modehandlers[pos]->GetPrefix())
{
type2 += modehandlers[pos]->GetModeChar();
}
}
else
{
/* No parameters when removing */
type3 += modehandlers[pos]->GetModeChar();
}
}
}
else
{
type4 += modehandlers[pos]->GetModeChar();
}
}
}
return type1 + "," + type2 + "," + type3 + "," + type4;
}
bool ModeParser::PrefixComparison(prefixtype one, prefixtype two)
{
return one.second > two.second;
}
std::string ModeParser::BuildPrefixes()
{
std::string mletters;
std::string mprefixes;
pfxcontainer pfx;
std::map<char,char> prefix_to_mode;
for (unsigned char mode = 'A'; mode <= 'z'; mode++)
{
if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h'))
continue;
unsigned char pos = (mode-65) | MASK_CHANNEL;
if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
{
pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
}
}
sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
{
mletters = mletters + n->first;
mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
}
return "(" + mprefixes + ")" + mletters;
}
bool ModeParser::AddModeWatcher(ModeWatcher* mw)
{
unsigned char mask = 0;
unsigned char pos = 0;
if (!mw)
return false;
if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
return false;
mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
pos = (mw->GetModeChar()-65) | mask;
modewatchers[pos].push_back(mw);
return true;
}
bool ModeParser::DelModeWatcher(ModeWatcher* mw)
{
unsigned char mask = 0;
unsigned char pos = 0;
if (!mw)
return false;
if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
return false;
mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
pos = (mw->GetModeChar()-65) | mask;
ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
if (a == modewatchers[pos].end())
{
return false;
}
modewatchers[pos].erase(a);
return true;
}
/** This default implementation can remove simple user modes
*/
void ModeHandler::RemoveMode(userrec* user)
{
char moderemove[MAXBUF];
const char* parameters[] = { user->nick, moderemove };
if (user->IsModeSet(this->GetModeChar()))
{
sprintf(moderemove,"-%c",this->GetModeChar());
ServerInstance->Parser->CallHandler("MODE", parameters, 2, user);
}
}
/** This default implementation can remove simple channel modes
* (no parameters)
*/
void ModeHandler::RemoveMode(chanrec* channel)
{
char moderemove[MAXBUF];
const char* parameters[] = { channel->name, moderemove };
if (channel->IsModeSet(this->GetModeChar()))
{
userrec* n = new userrec(ServerInstance);
sprintf(moderemove,"-%c",this->GetModeChar());
n->SetFd(FD_MAGIC_NUMBER);
ServerInstance->SendMode(parameters, 2, n);
delete n;
}
}
ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
{
struct Initializer
{
char modechar;
ModeHandler* handler;
};
Initializer modes[] = {
{ 's', new ModeChannelSecret(Instance) },
{ 'p', new ModeChannelPrivate(Instance) },
{ 'm', new ModeChannelModerated(Instance) },
{ 't', new ModeChannelTopicOps(Instance) },
{ 'n', new ModeChannelNoExternal(Instance) },
{ 'i', new ModeChannelInviteOnly(Instance) },
{ 'k', new ModeChannelKey(Instance) },
{ 'l', new ModeChannelLimit(Instance) },
{ 'b', new ModeChannelBan(Instance) },
{ 'o', new ModeChannelOp(Instance) },
{ 'h', new ModeChannelHalfOp(Instance) },
{ 'v', new ModeChannelVoice(Instance) },
{ 's', new ModeUserServerNotice(Instance) },
{ 'w', new ModeUserWallops(Instance) },
{ 'i', new ModeUserInvisible(Instance) },
{ 'o', new ModeUserOperator(Instance) },
{ 'n', new ModeUserServerNoticeMask(Instance) },
{ 0, NULL }
};
/* Clear mode list */
memset(modehandlers, 0, sizeof(modehandlers));
memset(modewatchers, 0, sizeof(modewatchers));
/* Last parse string */
LastParse.clear();
/* Initialise the RFC mode letters */
for (int index = 0; modes[index].modechar; index++)
this->AddMode(modes[index].handler, modes[index].modechar);
}
\ No newline at end of file +/* +------------------------------------+ + * | Inspire Internet Relay Chat Daemon | + * +------------------------------------+ + * + * InspIRCd: (C) 2002-2007 InspIRCd Development Team + * See: http://www.inspircd.org/wiki/index.php/Credits + * + * This program is free but copyrighted software; see + * the file COPYING for details. + * + * --------------------------------------------------- + */ + +#include "inspircd.h" +#include "users.h" +#include "modules.h" +#include "inspstring.h" +#include "mode.h" + +/* +s (secret) */ +#include "modes/cmode_s.h" +/* +p (private) */ +#include "modes/cmode_p.h" +/* +b (bans) */ +#include "modes/cmode_b.h" +/* +m (moderated) */ +#include "modes/cmode_m.h" +/* +t (only (half) ops can change topic) */ +#include "modes/cmode_t.h" +/* +n (no external messages) */ +#include "modes/cmode_n.h" +/* +i (invite only) */ +#include "modes/cmode_i.h" +/* +k (keyed channel) */ +#include "modes/cmode_k.h" +/* +l (channel user limit) */ +#include "modes/cmode_l.h" +/* +o (channel op) */ +#include "modes/cmode_o.h" +/* +h (channel halfop) */ +#include "modes/cmode_h.h" +/* +v (channel voice) */ +#include "modes/cmode_v.h" +/* +s (server notices) */ +#include "modes/umode_s.h" +/* +w (see wallops) */ +#include "modes/umode_w.h" +/* +i (invisible) */ +#include "modes/umode_i.h" +/* +o (operator) */ +#include "modes/umode_o.h" +/* +n (notice mask - our implementation of snomasks) */ +#include "modes/umode_n.h" + +ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix) + : ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), oper(operonly), prefix(mprefix), count(0) +{ +} + +ModeHandler::~ModeHandler() +{ +} + +bool ModeHandler::IsListMode() +{ + return list; +} + +unsigned int ModeHandler::GetPrefixRank() +{ + return 0; +} + +unsigned int ModeHandler::GetCount() +{ + return 0; +} + +void ModeHandler::ChangeCount(int modifier) +{ + count += modifier; +} + +ModeType ModeHandler::GetModeType() +{ + return m_type; +} + +bool ModeHandler::NeedsOper() +{ + return oper; +} + +char ModeHandler::GetPrefix() +{ + return prefix; +} + +int ModeHandler::GetNumParams(bool adding) +{ + return adding ? n_params_on : n_params_off; +} + +char ModeHandler::GetModeChar() +{ + return mode; +} + +ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding) +{ + return MODEACTION_DENY; +} + +ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter) +{ + if (dest) + { + return std::make_pair(dest->IsModeSet(this->mode), ""); + } + else + { + return std::make_pair(channel->IsModeSet(this->mode), ""); + } +} + +void ModeHandler::DisplayList(userrec* user, chanrec* channel) +{ +} + +bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel) +{ + return (ours < theirs); +} + +ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type) +{ +} + +ModeWatcher::~ModeWatcher() +{ +} + +char ModeWatcher::GetModeChar() +{ + return mode; +} + +ModeType ModeWatcher::GetModeType() +{ + return m_type; +} + +bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding, ModeType type) +{ + return true; +} + +void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter, bool adding, ModeType type) +{ +} + +userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status) +{ + userrec *d; + if ((!user) || (!dest) || (!chan) || (!*dest)) + { + return NULL; + } + d = ServerInstance->FindNick(dest); + if (!d) + { + user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest); + return NULL; + } + return d; +} + +const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK) +{ + if (!chan) + return ""; + + UCListIter n = d->chans.find(chan); + if (n != d->chans.end()) + { + if (n->second & MASK) + { + return ""; + } + n->second = n->second | MASK; + switch (MASK) + { + case UCMODE_OP: + n->first->AddOppedUser(d); + break; + case UCMODE_HOP: + n->first->AddHalfoppedUser(d); + break; + case UCMODE_VOICE: + n->first->AddVoicedUser(d); + break; + } + return d->nick; + } + return ""; +} + +const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK) +{ + if (!chan) + return ""; + + UCListIter n = d->chans.find(chan); + if (n != d->chans.end()) + { + if ((n->second & MASK) == 0) + { + return ""; + } + n->second ^= MASK; + switch (MASK) + { + case UCMODE_OP: + n->first->DelOppedUser(d); + break; + case UCMODE_HOP: + n->first->DelHalfoppedUser(d); + break; + case UCMODE_VOICE: + n->first->DelVoicedUser(d); + break; + } + return d->nick; + } + return ""; +} + +void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text) +{ + if (targetchannel) + { + /* Display channel's current mode string */ + user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user))); + user->WriteServ("329 %s %s %lu", user->nick, targetchannel->name, (unsigned long)targetchannel->age); + return; + } + else if (targetuser) + { + if (targetuser->Visibility && !targetuser->Visibility->VisibleTo(user)) + { + user->WriteServ("401 %s %s :No such nick/channel",user->nick, text); + return; + } + + if ((targetuser == user) || (IS_OPER(user))) + { + /* Display user's current mode string */ + user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes()); + if (IS_OPER(targetuser)) + user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks()); + return; + } + else + { + user->WriteServ("502 %s :Can't change mode for other users", user->nick); + return; + } + } + + /* No such nick/channel */ + user->WriteServ("401 %s %s :No such nick/channel",user->nick, text); + return; +} + +void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode) +{ + std::string target = parameters[0]; + ModeType type = MODETYPE_USER; + unsigned char mask = 0; + chanrec* targetchannel = ServerInstance->FindChan(parameters[0]); + userrec* targetuser = ServerInstance->FindNick(parameters[0]); + + LastParse.clear(); + + /* Special case for displaying the list for listmodes, + * e.g. MODE #chan b, or MODE #chan +b without a parameter + */ + if ((targetchannel) && (pcnt == 2)) + { + const char* mode = parameters[1]; + int nonlistmodes_found = 0; + bool sent[256]; + + mask = MASK_CHANNEL; + + memset(&sent, 0, 256); + + while (mode && *mode) + { + unsigned char mletter = *mode; + + if (*mode == '+') + { + mode++; + continue; + } + + /* Ensure the user doesnt request the same mode twice, + * so they cant flood themselves off out of idiocy. + */ + if (!sent[mletter]) + { + sent[mletter] = true; + } + else + { + mode++; + continue; + } + + ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL); + bool display = true; + + if ((mh) && (mh->IsListMode())) + { + if (ServerInstance->Config->HideModeLists[mletter] && (targetchannel->GetStatus(user) < STATUS_HOP)) + { + user->WriteServ("482 %s %s :Only half-operators and above may view the +%c list",user->nick, targetchannel->name, *mode++); + continue; + } + + /** See below for a description of what craq this is :D + */ + unsigned char handler_id = (*mode - 65) | mask; + + for(ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++) + { + std::string dummyparam; + + if (!((*watchers)->BeforeMode(user, NULL, targetchannel, dummyparam, true, MODETYPE_CHANNEL))) + display = false; + } + + if (display) + mh->DisplayList(user, targetchannel); + } + else + nonlistmodes_found++; + + mode++; + } + + /* We didnt have any modes that were non-list, we can return here */ + if (!nonlistmodes_found) + return; + } + + if (pcnt == 1) + { + this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]); + } + else if (pcnt > 1) + { + if (targetchannel) + { + type = MODETYPE_CHANNEL; + mask = MASK_CHANNEL; + + /* Extra security checks on channel modes + * (e.g. are they a (half)op? + */ + + if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP)) + { + /* We don't have halfop */ + int MOD_RESULT = 0; + FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE)); + if (MOD_RESULT == ACR_DENY) + return; + + if (MOD_RESULT == ACR_DEFAULT) + { + /* Are we a uline or is it a servermode? */ + if ((!ServerInstance->ULine(user->server)) && (!servermode)) + { + /* Not enough permission: + * NOT a uline and NOT a servermode, + * OR, NOT halfop or above. + */ + user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name); + return; + } + } + } + } + else if (targetuser) + { + type = MODETYPE_USER; + mask = MASK_USER; + if ((user != targetuser) && (!ServerInstance->ULine(user->server))) + { + user->WriteServ("502 %s :Can't change mode for other users", user->nick); + return; + } + } + else + { + /* No such nick/channel */ + user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]); + return; + } + + std::string mode_sequence = parameters[1]; + std::string parameter; + std::ostringstream parameter_list; + std::string output_sequence; + bool adding = true, state_change = false; + unsigned char handler_id = 0; + int parameter_counter = 2; /* Index of first parameter */ + int parameter_count = 0; + bool last_successful_state_change = false; + + /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */ + if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-')) + mode_sequence.insert(0, "+"); + + for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++) + { + unsigned char modechar = *letter; + + switch (modechar) + { + /* NB: + * For + and - mode characters, we don't just stick the character into the output sequence. + * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this + * appearing in the output sequence, we store a flag which says there was a state change, + * which is set on any + or -, however, the + or - that we finish on is only appended to + * the output stream in the event it is followed by a non "+ or -" character, such as o or v. + */ + case '+': + /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick, + * however, will allow the + if it is the first item in the sequence, regardless. + */ + if ((!adding) || (!output_sequence.length())) + state_change = true; + adding = true; + if (!output_sequence.length()) + last_successful_state_change = false; + continue; + break; + case '-': + if ((adding) || (!output_sequence.length())) + state_change = true; + adding = false; + if (!output_sequence.length()) + last_successful_state_change = true; + continue; + break; + default: + + /** + * Watch carefully for the sleight of hand trick. + * 65 is the ascii value of 'A'. We take this from + * the char we're looking at to get a number between + * 1 and 127. We then logic-or it to get the hashed + * position, dependent on wether its a channel or + * a user mode. This is a little stranger, but a lot + * faster, than using a map of pairs. + */ + handler_id = (modechar - 65) | mask; + + if (modehandlers[handler_id]) + { + bool abort = false; + + if (modehandlers[handler_id]->GetModeType() == type) + { + if (modehandlers[handler_id]->GetNumParams(adding)) + { + /* This mode expects a parameter, do we have any parameters left in our list to use? */ + if (parameter_counter < pcnt) + { + parameter = parameters[parameter_counter++]; + + /* Yerk, invalid! */ + if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos)) + parameter.clear(); + } + else + { + /* No parameter, continue to the next mode */ + continue; + } + + bool had_parameter = !parameter.empty(); + + for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++) + { + if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false) + { + abort = true; + break; + } + /* A module whacked the parameter completely, and there was one. abort. */ + if ((had_parameter) && (parameter.empty())) + { + abort = true; + break; + } + } + + if (abort) + continue; + } + else + { + /* Fix by brain: mode watchers not being called for parameterless modes */ + for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++) + { + if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == false) + { + abort = true; + break; + } + } + + if (abort) + continue; + } + + /* It's an oper only mode, check if theyre an oper. If they arent, + * eat any parameter that came with the mode, and continue to next + */ + if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!IS_OPER(user))) + { + user->WriteServ("481 %s :Permission Denied - Only IRC operators may %sset %s mode %c", user->nick, + adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user", + modehandlers[handler_id]->GetModeChar()); + continue; + } + + /* Call the handler for the mode */ + ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding); + + if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter.empty())) + { + /* The handler nuked the parameter and they are supposed to have one. + * We CANT continue now, even if they actually returned MODEACTION_ALLOW, + * so we bail to the next mode character. + */ + continue; + } + + if (ma == MODEACTION_ALLOW) + { + /* We're about to output a valid mode letter - was there previously a pending state-change? */ + if (state_change) + { + if (adding != last_successful_state_change) + output_sequence.append(adding ? "+" : "-"); + last_successful_state_change = adding; + } + + /* Add the mode letter */ + output_sequence.push_back(modechar); + + /* Is there a valid parameter for this mode? If so add it to the parameter list */ + if ((modehandlers[handler_id]->GetNumParams(adding)) && (!parameter.empty())) + { + parameter_list << " " << parameter; + parameter_count++; + /* Does this mode have a prefix? */ + if (modehandlers[handler_id]->GetPrefix() && targetchannel) + { + userrec* user_to_prefix = ServerInstance->FindNick(parameter); + if (user_to_prefix) + targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(), + modehandlers[handler_id]->GetPrefixRank(), adding); + } + } + + /* Call all the AfterMode events in the mode watchers for this mode */ + for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++) + (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type); + + /* Reset the state change flag */ + state_change = false; + + if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100) + || (parameter_count > MAXMODES)) + { + /* We cant have a mode sequence this long */ + letter = mode_sequence.end() - 1; + continue; + } + } + } + } + else + { + /* No mode handler? Unknown mode character then. */ + user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar); + } + break; + } + } + + /* Was there at least one valid mode in the sequence? */ + if (!output_sequence.empty()) + { + if (servermode) + { + if (type == MODETYPE_CHANNEL) + { + targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str()); + this->LastParse = targetchannel->name; + } + else + { + targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str()); + this->LastParse = targetuser->nick; + } + } + else + { + if (type == MODETYPE_CHANNEL) + { + targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str()); + FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str())); + this->LastParse = targetchannel->name; + } + else + { + user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str()); + FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence + parameter_list.str())); + this->LastParse = targetuser->nick; + } + } + + LastParse.append(" "); + LastParse.append(output_sequence); + LastParse.append(parameter_list.str()); + } + } +} + +const std::string& ModeParser::GetLastParse() +{ + return LastParse; +} + +void ModeParser::CleanMask(std::string &mask) +{ + std::string::size_type pos_of_pling = mask.find_first_of('!'); + std::string::size_type pos_of_at = mask.find_first_of('@'); + std::string::size_type pos_of_dot = mask.find_first_of('.'); + std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */ + + if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos)) + { + /* Just a nick, or just a host */ + if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos)) + { + /* It has no '.' in it, it must be a nick. */ + mask.append("!*@*"); + } + else + { + /* Got a dot in it? Has to be a host */ + mask = "*!*@" + mask; + } + } + else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos)) + { + /* Has an @ but no !, its a user@host */ + mask = "*!" + mask; + } + else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos)) + { + /* Has a ! but no @, it must be a nick!ident */ + mask.append("@*"); + } +} + +bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter) +{ + unsigned char mask = 0; + unsigned char pos = 0; + + /* Yes, i know, this might let people declare modes like '_' or '^'. + * If they do that, thats their problem, and if i ever EVER see an + * official InspIRCd developer do that, i'll beat them with a paddle! + */ + if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z') || (mh->GetPrefix() > 126)) + return false; + + /* A mode prefix of ',' is not acceptable, it would fuck up server to server. + * A mode prefix of ':' will fuck up both server to server, and client to server. + * A mode prefix of '#' will mess up /whois and /privmsg + */ + if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#')) + return false; + + mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL; + pos = (mh->GetModeChar()-65) | mask; + + if (modehandlers[pos]) + return false; + + modehandlers[pos] = mh; + return true; +} + +bool ModeParser::DelMode(ModeHandler* mh) +{ + unsigned char mask = 0; + unsigned char pos = 0; + + if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z')) + return false; + + mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL; + pos = (mh->GetModeChar()-65) | mask; + + if (!modehandlers[pos]) + return false; + + switch (mh->GetModeType()) + { + case MODETYPE_USER: + for (user_hash::iterator i = ServerInstance->clientlist->begin(); i != ServerInstance->clientlist->end(); i++) + { + mh->RemoveMode(i->second); + } + break; + case MODETYPE_CHANNEL: + for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++) + { + mh->RemoveMode(i->second); + } + break; + } + + modehandlers[pos] = NULL; + + return true; +} + +ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt) +{ + unsigned char mask = 0; + unsigned char pos = 0; + + if ((modeletter < 'A') || (modeletter > 'z')) + return NULL; + + mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL; + pos = (modeletter-65) | mask; + + return modehandlers[pos]; +} + +std::string ModeParser::UserModeList() +{ + char modestr[256]; + int pointer = 0; + + for (unsigned char mode = 'A'; mode <= 'z'; mode++) + { + unsigned char pos = (mode-65) | MASK_USER; + + if (modehandlers[pos]) + modestr[pointer++] = mode; + } + modestr[pointer++] = 0; + return modestr; +} + +std::string ModeParser::ChannelModeList() +{ + char modestr[256]; + int pointer = 0; + + for (unsigned char mode = 'A'; mode <= 'z'; mode++) + { + if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h')) + continue; + + unsigned char pos = (mode-65) | MASK_CHANNEL; + + if (modehandlers[pos]) + modestr[pointer++] = mode; + } + modestr[pointer++] = 0; + return modestr; +} + +std::string ModeParser::ParaModeList() +{ + char modestr[256]; + int pointer = 0; + + for (unsigned char mode = 'A'; mode <= 'z'; mode++) + { + if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h')) + continue; + + unsigned char pos = (mode-65) | MASK_CHANNEL; + + if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true))) + modestr[pointer++] = mode; + } + modestr[pointer++] = 0; + return modestr; +} + +ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter) +{ + for (unsigned char mode = 'A'; mode <= 'z'; mode++) + { + unsigned char pos = (mode-65) | MASK_CHANNEL; + + if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter)) + { + return modehandlers[pos]; + } + } + return NULL; +} + +std::string ModeParser::ModeString(userrec* user, chanrec* channel) +{ + std::string types; + std::string pars; + + if (!channel || !user) + return ""; + + for (unsigned char mode = 'A'; mode <= 'z'; mode++) + { + unsigned char pos = (mode-65) | MASK_CHANNEL; + ModeHandler* mh = modehandlers[pos]; + if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false))) + { + ModePair ret; + ret = mh->ModeSet(NULL, user, channel, user->nick); + if ((ret.first) && (ret.second == user->nick)) + { + pars.append(" "); + pars.append(user->nick); + types.push_back(mh->GetModeChar()); + } + } + } + + return types+pars; +} + +std::string ModeParser::ChanModes() +{ + std::string type1; /* Listmodes EXCEPT those with a prefix */ + std::string type2; /* Modes that take a param when adding or removing */ + std::string type3; /* Modes that only take a param when adding */ + std::string type4; /* Modes that dont take a param */ + + for (unsigned char mode = 'A'; mode <= 'z'; mode++) + { + if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h')) + continue; + + unsigned char pos = (mode-65) | MASK_CHANNEL; + /* One parameter when adding */ + if (modehandlers[pos]) + { + if (modehandlers[pos]->GetNumParams(true)) + { + if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix())) + { + type1 += modehandlers[pos]->GetModeChar(); + } + else + { + /* ... and one parameter when removing */ + if (modehandlers[pos]->GetNumParams(false)) + { + /* But not a list mode */ + if (!modehandlers[pos]->GetPrefix()) + { + type2 += modehandlers[pos]->GetModeChar(); + } + } + else + { + /* No parameters when removing */ + type3 += modehandlers[pos]->GetModeChar(); + } + } + } + else + { + type4 += modehandlers[pos]->GetModeChar(); + } + } + + } + + return type1 + "," + type2 + "," + type3 + "," + type4; +} + +bool ModeParser::PrefixComparison(prefixtype one, prefixtype two) +{ + return one.second > two.second; +} + +std::string ModeParser::BuildPrefixes() +{ + std::string mletters; + std::string mprefixes; + pfxcontainer pfx; + std::map<char,char> prefix_to_mode; + + for (unsigned char mode = 'A'; mode <= 'z'; mode++) + { + if ((!ServerInstance->Config->AllowHalfop) && (mode == 'h')) + continue; + + unsigned char pos = (mode-65) | MASK_CHANNEL; + + if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix())) + { + pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank())); + prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar(); + } + } + + sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison); + + for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++) + { + mletters = mletters + n->first; + mprefixes = mprefixes + prefix_to_mode.find(n->first)->second; + } + + return "(" + mprefixes + ")" + mletters; +} + +bool ModeParser::AddModeWatcher(ModeWatcher* mw) +{ + unsigned char mask = 0; + unsigned char pos = 0; + + if (!mw) + return false; + + if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z')) + return false; + + mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL; + pos = (mw->GetModeChar()-65) | mask; + + modewatchers[pos].push_back(mw); + + return true; +} + +bool ModeParser::DelModeWatcher(ModeWatcher* mw) +{ + unsigned char mask = 0; + unsigned char pos = 0; + + if (!mw) + return false; + + if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z')) + return false; + + mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL; + pos = (mw->GetModeChar()-65) | mask; + + ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw); + + if (a == modewatchers[pos].end()) + { + return false; + } + + modewatchers[pos].erase(a); + + return true; +} + +/** This default implementation can remove simple user modes + */ +void ModeHandler::RemoveMode(userrec* user) +{ + char moderemove[MAXBUF]; + const char* parameters[] = { user->nick, moderemove }; + + if (user->IsModeSet(this->GetModeChar())) + { + sprintf(moderemove,"-%c",this->GetModeChar()); + ServerInstance->Parser->CallHandler("MODE", parameters, 2, user); + } +} + +/** This default implementation can remove simple channel modes + * (no parameters) + */ +void ModeHandler::RemoveMode(chanrec* channel) +{ + char moderemove[MAXBUF]; + const char* parameters[] = { channel->name, moderemove }; + + if (channel->IsModeSet(this->GetModeChar())) + { + userrec* n = new userrec(ServerInstance); + + sprintf(moderemove,"-%c",this->GetModeChar()); + n->SetFd(FD_MAGIC_NUMBER); + + ServerInstance->SendMode(parameters, 2, n); + + delete n; + } +} + +ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance) +{ + struct Initializer + { + char modechar; + ModeHandler* handler; + }; + + Initializer modes[] = { + { 's', new ModeChannelSecret(Instance) }, + { 'p', new ModeChannelPrivate(Instance) }, + { 'm', new ModeChannelModerated(Instance) }, + { 't', new ModeChannelTopicOps(Instance) }, + { 'n', new ModeChannelNoExternal(Instance) }, + { 'i', new ModeChannelInviteOnly(Instance) }, + { 'k', new ModeChannelKey(Instance) }, + { 'l', new ModeChannelLimit(Instance) }, + { 'b', new ModeChannelBan(Instance) }, + { 'o', new ModeChannelOp(Instance) }, + { 'h', new ModeChannelHalfOp(Instance) }, + { 'v', new ModeChannelVoice(Instance) }, + { 's', new ModeUserServerNotice(Instance) }, + { 'w', new ModeUserWallops(Instance) }, + { 'i', new ModeUserInvisible(Instance) }, + { 'o', new ModeUserOperator(Instance) }, + { 'n', new ModeUserServerNoticeMask(Instance) }, + { 0, NULL } + }; + + /* Clear mode list */ + memset(modehandlers, 0, sizeof(modehandlers)); + memset(modewatchers, 0, sizeof(modewatchers)); + + /* Last parse string */ + LastParse.clear(); + + /* Initialise the RFC mode letters */ + for (int index = 0; modes[index].modechar; index++) + this->AddMode(modes[index].handler, modes[index].modechar); +} |