X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmode.cpp;h=947f3c4fb53a5f69af8ee459044bc6a49d522e98;hb=219993bc9018d9f0d9568330d7a972b68b785d27;hp=cfb009273684ab0f97cefe527672e7f471f125f7;hpb=bab14f0dd2345c9d7dcbc47c918563709e1ac094;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/mode.cpp b/src/mode.cpp index cfb009273..947f3c4fb 100644 --- a/src/mode.cpp +++ b/src/mode.cpp @@ -1 +1,1229 @@ -/* +------------------------------------+ * | 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 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(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) 2002-2009 InspIRCd Development Team + * See: http://wiki.inspircd.org/Credits + * + * This program is free but copyrighted software; see + * the file COPYING for details. + * + * --------------------------------------------------- + */ + +/* $Core */ + +#include "inspircd.h" +#include "inspstring.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" +/* +w (see wallops) */ +#include "modes/umode_w.h" +/* +i (invisible) */ +#include "modes/umode_i.h" +/* +o (operator) */ +#include "modes/umode_o.h" +/* +s (server notice masks) */ +#include "modes/umode_s.h" + +ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix, char prefixrequired, TranslateType translate) + : ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), m_paramtype(translate), oper(operonly), prefix(mprefix), count(0), prefixneeded(prefixrequired) +{ +} + +ModeHandler::~ModeHandler() +{ +} + +bool ModeHandler::IsListMode() +{ + return list; +} + +char ModeHandler::GetNeededPrefix() +{ + if (prefixneeded == '%' && !ServerInstance->Config->AllowHalfop) + return '@'; + return prefixneeded; +} + +void ModeHandler::SetNeededPrefix(char needsprefix) +{ + prefixneeded = needsprefix; +} + +unsigned int ModeHandler::GetPrefixRank() +{ + return 0; +} + +unsigned int ModeHandler::GetCount() +{ + return 0; +} + +void ModeHandler::ChangeCount(int modifier) +{ + count += modifier; + ServerInstance->Logs->Log("MODE", DEBUG,"Change count for mode %c is now %d", mode, count); +} + +ModeType ModeHandler::GetModeType() +{ + return m_type; +} + +TranslateType ModeHandler::GetTranslateType() +{ + return m_paramtype; +} + +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; +} + +std::string ModeHandler::GetUserParameter(User* user) +{ + return ""; +} + +ModeAction ModeHandler::OnModeChange(User*, User*, Channel*, std::string&, bool, bool) +{ + return MODEACTION_DENY; +} + +ModePair ModeHandler::ModeSet(User*, User* dest, Channel* channel, const std::string&) +{ + if (dest) + { + return std::make_pair(dest->IsModeSet(this->mode), ""); + } + else + { + return std::make_pair(channel->IsModeSet(this->mode), ""); + } +} + +void ModeHandler::DisplayList(User*, Channel*) +{ +} + +void ModeHandler::DisplayEmptyList(User*, Channel*) +{ +} + +void ModeHandler::OnParameterMissing(User* user, User* dest, Channel* channel) +{ +} + +bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string&, const std::string&, Channel*) +{ + return (ours < theirs); +} + +SimpleUserModeHandler::SimpleUserModeHandler(InspIRCd* Instance, char modeletter) : ModeHandler(Instance, modeletter, 0, 0, false, MODETYPE_USER, false) +{ +} + +SimpleUserModeHandler::~SimpleUserModeHandler() +{ +} + +SimpleChannelModeHandler::~SimpleChannelModeHandler() +{ +} + +SimpleChannelModeHandler::SimpleChannelModeHandler(InspIRCd* Instance, char modeletter) : ModeHandler(Instance, modeletter, 0, 0, false, MODETYPE_CHANNEL, false) +{ +} + +ModeAction SimpleUserModeHandler::OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding, bool servermode) +{ + if (adding) + { + if (!dest->IsModeSet(this->GetModeChar())) + { + dest->SetMode(this->GetModeChar(),true); + return MODEACTION_ALLOW; + } + } + else + { + if (dest->IsModeSet(this->GetModeChar())) + { + dest->SetMode(this->GetModeChar(),false); + return MODEACTION_ALLOW; + } + } + + return MODEACTION_DENY; +} + + +ModeAction SimpleChannelModeHandler::OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding, bool servermode) +{ + if (adding) + { + if (!channel->IsModeSet(this->GetModeChar())) + { + channel->SetMode(this->GetModeChar(),true); + return MODEACTION_ALLOW; + } + } + else + { + if (channel->IsModeSet(this->GetModeChar())) + { + channel->SetMode(this->GetModeChar(),false); + return MODEACTION_ALLOW; + } + } + + return MODEACTION_DENY; +} + +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(User*, User*, Channel*, std::string&, bool, ModeType, bool) +{ + return true; +} + +void ModeWatcher::AfterMode(User*, User*, Channel*, const std::string&, bool, ModeType, bool) +{ +} + +User* ModeParser::SanityChecks(User *user, const char *dest, Channel *chan, int) +{ + User *d; + if ((!user) || (!dest) || (!chan) || (!*dest)) + { + return NULL; + } + d = ServerInstance->FindNick(dest); + if (!d) + { + user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), dest); + return NULL; + } + return d; +} + +const char* ModeParser::Grant(User *d,Channel *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.c_str(); + } + return ""; +} + +const char* ModeParser::Revoke(User *d,Channel *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.c_str(); + } + return ""; +} + +void ModeParser::DisplayCurrentModes(User *user, User* targetuser, Channel* targetchannel, const char* text) +{ + if (targetchannel) + { + /* Display channel's current mode string */ + user->WriteNumeric(RPL_CHANNELMODEIS, "%s %s +%s",user->nick.c_str(), targetchannel->name.c_str(), targetchannel->ChanModes(targetchannel->HasUser(user))); + user->WriteNumeric(RPL_CHANNELCREATED, "%s %s %lu", user->nick.c_str(), targetchannel->name.c_str(), (unsigned long)targetchannel->age); + return; + } + else if (targetuser) + { + if (targetuser->Visibility && !targetuser->Visibility->VisibleTo(user)) + { + user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), text); + return; + } + + if (targetuser == user || user->HasPrivPermission("users/auspex")) + { + /* Display user's current mode string */ + user->WriteNumeric(RPL_UMODEIS, "%s :+%s",targetuser->nick.c_str(),targetuser->FormatModes()); + if (IS_OPER(targetuser)) + user->WriteNumeric(RPL_SNOMASKIS, "%s +%s :Server notice mask", targetuser->nick.c_str(), targetuser->FormatNoticeMasks()); + return; + } + else + { + user->WriteNumeric(ERR_USERSDONTMATCH, "%s :Can't change mode for other users", user->nick.c_str()); + return; + } + } + + /* No such nick/channel */ + user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), text); + return; +} + +void ModeParser::Process(const std::vector& parameters, User *user, bool servermode) +{ + std::string target = parameters[0]; + ModeType type = MODETYPE_USER; + unsigned char mask = 0; + Channel* targetchannel = ServerInstance->FindChan(parameters[0]); + User* targetuser = ServerInstance->FindNick(parameters[0]); + + LastParse.clear(); + LastParseParams.clear(); + LastParseTranslate.clear(); + + /* Special case for displaying the list for listmodes, + * e.g. MODE #chan b, or MODE #chan +b without a parameter + */ + if ((targetchannel) && (parameters.size() == 2)) + { + const char* mode = parameters[1].c_str(); + int nonlistmodes_found = 0; + + seq++; + + mask = MASK_CHANNEL; + + 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] != seq) + { + sent[mletter] = seq; + } + else + { + mode++; + continue; + } + + ModeHandler *mh = this->FindMode(*mode, MODETYPE_CHANNEL); + bool display = true; + + if ((mh) && (mh->IsListMode())) + { + int MOD_RESULT = 0; + FOREACH_RESULT(I_OnRawMode, OnRawMode(user, targetchannel, *mode, "", true, 0)); + if (MOD_RESULT == ACR_DENY) + { + mode++; + continue; + } + + if (!user->HasPrivPermission("channels/auspex")) + { + if (ServerInstance->Config->HideModeLists[mletter] && (targetchannel->GetStatus(user) < STATUS_HOP)) + { + user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :Only half-operators and above may view the +%c list",user->nick.c_str(), targetchannel->name.c_str(), *mode++); + mh->DisplayEmptyList(user, targetchannel); + 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 (parameters.size() == 1) + { + this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0].c_str()); + } + else if (parameters.size() > 1) + { + bool SkipAccessChecks = false; + + 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)) && (!ServerInstance->ULine(user->server)) && (!servermode)) + { + /* Make modes that are being changed visible to OnAccessCheck */ + LastParse = parameters[1]; + /* We don't have halfop */ + int MOD_RESULT = 0; + FOREACH_RESULT(I_OnAccessCheck,OnAccessCheck(user, NULL, targetchannel, AC_GENERAL_MODE)); + LastParse.clear(); + if (MOD_RESULT == ACR_DENY) + return; + SkipAccessChecks = (MOD_RESULT == ACR_ALLOW); + } + } + else if (targetuser) + { + type = MODETYPE_USER; + mask = MASK_USER; + if (user != targetuser && IS_LOCAL(user) && !ServerInstance->ULine(user->server)) + { + user->WriteNumeric(ERR_USERSDONTMATCH, "%s :Can't change mode for other users", user->nick.c_str()); + return; + } + } + else + { + /* No such nick/channel */ + user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), parameters[0].c_str()); + 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; + unsigned int parameter_counter = 2; /* Index of first parameter */ + unsigned int parameter_count = 0; + bool last_successful_state_change = false; + LastParseParams.push_back(output_sequence); + LastParseTranslate.push_back(TR_TEXT); + + /* 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) + { + int MOD_RESULT = 0; + + 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 < parameters.size()) + { + 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 */ + modehandlers[handler_id]->OnParameterMissing(user, targetuser, targetchannel); + continue; + } + + FOREACH_RESULT(I_OnRawMode, OnRawMode(user, targetchannel, modechar, parameter, adding, 1, servermode)); + } + else + { + FOREACH_RESULT(I_OnRawMode, OnRawMode(user, targetchannel, modechar, "", adding, 0, servermode)); + } + + if (IS_LOCAL(user) && (MOD_RESULT == ACR_DENY)) + continue; + + if (!SkipAccessChecks && IS_LOCAL(user) && (MOD_RESULT != ACR_ALLOW)) + { + /* Check access to this mode character */ + if ((type == MODETYPE_CHANNEL) && (modehandlers[handler_id]->GetNeededPrefix())) + { + char needed = modehandlers[handler_id]->GetNeededPrefix(); + ModeHandler* prefixmode = FindPrefix(needed); + + /* If the mode defined by the handler is not '\0', but the handler for it + * cannot be found, they probably dont have the right module loaded to implement + * the prefix they want to compare the mode against, e.g. '&' for m_chanprotect. + * Revert to checking against the minimum core prefix, '%' or '@'. + */ + if (needed && !prefixmode) + prefixmode = ServerInstance->Config->AllowHalfop ? FindPrefix('%') : FindPrefix('@'); + + unsigned int neededrank = prefixmode->GetPrefixRank(); + /* Compare our rank on the channel against the rank of the required prefix, + * allow if >= ours. Because mIRC and xchat throw a tizz if the modes shown + * in NAMES(X) are not in rank order, we know the most powerful mode is listed + * first, so we don't need to iterate, we just look up the first instead. + */ + std::string modestring = targetchannel->GetAllPrefixChars(user); + char ml = (modestring.empty() ? '\0' : modestring[0]); + ModeHandler* ourmode = FindPrefix(ml); + if (!ourmode || ourmode->GetPrefixRank() < neededrank) + { + /* Bog off */ + user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You must have channel privilege %c or above to %sset channel mode %c", + user->nick.c_str(), targetchannel->name.c_str(), needed, adding ? "" : "un", modechar); + 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, servermode) == 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; + + /* If it's disabled, they have to be an oper. + */ + if (IS_LOCAL(user) && !IS_OPER(user) && ((type == MODETYPE_CHANNEL ? ServerInstance->Config->DisabledCModes : ServerInstance->Config->DisabledUModes)[modehandlers[handler_id]->GetModeChar() - 'A'])) + { + user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - %s mode %c has been locked by the administrator", + user->nick.c_str(), + type == MODETYPE_CHANNEL ? "channel" : "user", + modehandlers[handler_id]->GetModeChar()); + 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 (adding && (IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!user->HasModePermission(modehandlers[handler_id]->GetModeChar(), type))) + { + if (IS_OPER(user)) + { + user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - Oper type %s does not have access to set %s mode %c", + user->nick.c_str(), + user->oper.c_str(), + type == MODETYPE_CHANNEL ? "channel" : "user", + modehandlers[handler_id]->GetModeChar()); + } + else + { + user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - Only operators may set %s mode %c", + user->nick.c_str(), + 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, servermode); + + 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); + + modehandlers[handler_id]->ChangeCount(adding ? 1 : -1); + + /* 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; + LastParseParams.push_back(parameter); + LastParseTranslate.push_back(modehandlers[handler_id]->GetTranslateType()); + parameter_count++; + /* Does this mode have a prefix? */ + if (modehandlers[handler_id]->GetPrefix() && targetchannel) + { + User* 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, servermode); + + /* Reset the state change flag */ + state_change = false; + + if ((output_sequence.length() + parameter_list.str().length() > 450) || (output_sequence.length() > 100) + || (parameter_count > ServerInstance->Config->Limits.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("%d %s %c :is unknown mode char to me", type == MODETYPE_CHANNEL ? 472 : 501, user->nick.c_str(), modechar); + } + break; + } + } + + /* Was there at least one valid mode in the sequence? */ + if (!output_sequence.empty()) + { + LastParseParams[0] = output_sequence; + if (!user) + { + if (type == MODETYPE_CHANNEL) + { + targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name.c_str(), output_sequence.c_str(), parameter_list.str().c_str()); + this->LastParse = targetchannel->name; + } + else + { + targetuser->WriteServ("MODE %s %s%s",targetuser->nick.c_str(),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.c_str(), output_sequence.c_str(), parameter_list.str().c_str()); + FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, LastParseParams, LastParseTranslate)); + this->LastParse = targetchannel->name; + } + else + { + user->WriteTo(targetuser, "MODE %s %s%s", targetuser->nick.c_str(), output_sequence.c_str(), parameter_list.str().c_str()); + FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, LastParseParams, LastParseTranslate)); + 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_colons = mask.find("::"); /* Because ipv6 addresses are colon delimited -- double so it treats extban as nick */ + + if (mask.length() >= 2 && mask[1] == ':') + return; // if it's an extban, don't even try guess how it needs to be formed. + + if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos)) + { + /* Just a nick, or just a host - or clearly ipv6 (starting with :) */ + if ((pos_of_dot == std::string::npos) && (pos_of_colons == std::string::npos) && mask[0] != ':') + { + /* 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 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; + + /* Note: We can't stack here, as we have modes potentially being removed across many different channels. + * To stack here we have to make the algorithm slower. Discuss. + */ + switch (mh->GetModeType()) + { + case MODETYPE_USER: + for (user_hash::iterator i = ServerInstance->Users->clientlist->begin(); i != ServerInstance->Users->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++) + { + 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++) + { + 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(User* user, Channel* channel, bool nick_suffix) +{ + 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)) + { + if (nick_suffix) + { + pars.append(" "); + pars.append(user->nick); + } + types.push_back(mh->GetModeChar()); + } + } + } + + if (nick_suffix) + return types+pars; + else + return types; +} + +std::string ModeParser::GiveModeList(ModeMasks m) +{ + 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++) + { + unsigned char pos = (mode-65) | m; + /* 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 prefix_to_mode; + + for (unsigned char mode = 'A'; mode <= 'z'; mode++) + { + unsigned char pos = (mode-65) | MASK_CHANNEL; + + if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix())) + { + pfx.push_back(std::make_pair(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(User* user, irc::modestacker* stack) +{ + char moderemove[MAXBUF]; + std::vector parameters; + + if (user->IsModeSet(this->GetModeChar())) + { + if (stack) + { + stack->Push(this->GetModeChar()); + } + else + { + sprintf(moderemove,"-%c",this->GetModeChar()); + parameters.push_back(user->nick); + parameters.push_back(moderemove); + ServerInstance->Modes->Process(parameters, ServerInstance->FakeClient, true); + } + } +} + +/** This default implementation can remove simple channel modes + * (no parameters) + */ +void ModeHandler::RemoveMode(Channel* channel, irc::modestacker* stack) +{ + char moderemove[MAXBUF]; + std::vector parameters; + + if (channel->IsModeSet(this->GetModeChar())) + { + if (stack) + { + stack->Push(this->GetModeChar()); + } + else + { + sprintf(moderemove,"-%c",this->GetModeChar()); + parameters.push_back(channel->name); + parameters.push_back(moderemove); + ServerInstance->SendMode(parameters, ServerInstance->FakeClient); + } + } +} + +ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance) +{ + ModeHandler* modes[] = + { + new ModeChannelSecret(Instance), + new ModeChannelPrivate(Instance), + new ModeChannelModerated(Instance), + new ModeChannelTopicOps(Instance), + new ModeChannelNoExternal(Instance), + new ModeChannelInviteOnly(Instance), + new ModeChannelKey(Instance), + new ModeChannelLimit(Instance), + new ModeChannelBan(Instance), + new ModeChannelOp(Instance), + new ModeChannelHalfOp(Instance), + new ModeChannelVoice(Instance), + new ModeUserWallops(Instance), + new ModeUserInvisible(Instance), + new ModeUserOperator(Instance), + new ModeUserServerNoticeMask(Instance), + NULL + }; + + /* Clear mode handler list */ + memset(modehandlers, 0, sizeof(modehandlers)); + + /* Last parse string */ + LastParse.clear(); + + /* Initialise the RFC mode letters */ + for (int index = 0; modes[index]; index++) + this->AddMode(modes[index]); + + seq = 0; + memset(&sent, 0, sizeof(sent)); +}