-/* +------------------------------------+\r * | Inspire Internet Relay Chat Daemon |\r * +------------------------------------+\r *\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team\r * See: http://www.inspircd.org/wiki/index.php/Credits\r *\r * This program is free but copyrighted software; see\r * the file COPYING for details.\r *\r * ---------------------------------------------------\r */\r\r#include "inspircd.h"\r#include "users.h"\r#include "channels.h"\r#include "modules.h"\r\r/* $ModDesc: Provides channel mode +f (message flood protection) */\r\r/** Holds flood settings and state for mode +f\r */\rclass floodsettings : public classbase\r{\r public:\r bool ban;\r int secs;\r int lines;\r time_t reset;\r std::map<userrec*,int> counters;\r\r floodsettings() : ban(0), secs(0), lines(0) {};\r floodsettings(bool a, int b, int c) : ban(a), secs(b), lines(c)\r {\r reset = time(NULL) + secs;\r };\r\r void addmessage(userrec* who)\r {\r std::map<userrec*,int>::iterator iter = counters.find(who);\r if (iter != counters.end())\r {\r iter->second++;\r }\r else\r {\r counters[who] = 1;\r }\r if (time(NULL) > reset)\r {\r counters.clear();\r reset = time(NULL) + secs;\r }\r }\r\r bool shouldkick(userrec* who)\r {\r std::map<userrec*,int>::iterator iter = counters.find(who);\r if (iter != counters.end())\r {\r return (iter->second >= this->lines);\r }\r else return false;\r }\r\r void clear(userrec* who)\r {\r std::map<userrec*,int>::iterator iter = counters.find(who);\r if (iter != counters.end())\r {\r counters.erase(iter);\r }\r }\r};\r\r/** Handles channel mode +f\r */\rclass MsgFlood : public ModeHandler\r{\r public:\r MsgFlood(InspIRCd* Instance) : ModeHandler(Instance, 'f', 1, 0, false, MODETYPE_CHANNEL, false) { }\r\r ModePair ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter)\r {\r floodsettings* x;\r if (channel->GetExt("flood",x))\r return std::make_pair(true, (x->ban ? "*" : "")+ConvToStr(x->lines)+":"+ConvToStr(x->secs));\r else\r return std::make_pair(false, parameter);\r }\r\r bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)\r {\r /* When TS is equal, the alphabetically later one wins */\r return (their_param < our_param);\r }\r\r ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding)\r {\r floodsettings *f;\r\r if (adding)\r {\r char ndata[MAXBUF];\r char* data = ndata;\r strlcpy(ndata,parameter.c_str(),MAXBUF);\r char* lines = data;\r char* secs = NULL;\r bool ban = false;\r if (*data == '*')\r {\r ban = true;\r lines++;\r }\r else\r {\r ban = false;\r }\r while (*data)\r {\r if (*data == ':')\r {\r *data = 0;\r data++;\r secs = data;\r break;\r }\r else data++;\r }\r if (secs)\r {\r /* Set up the flood parameters for this channel */\r int nlines = atoi(lines);\r int nsecs = atoi(secs);\r if ((nlines<1) || (nsecs<1))\r {\r source->WriteServ("608 %s %s :Invalid flood parameter",source->nick,channel->name);\r parameter.clear();\r return MODEACTION_DENY;\r }\r else\r {\r if (!channel->GetExt("flood", f))\r {\r parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" +ConvToStr(nsecs);\r floodsettings *f = new floodsettings(ban,nsecs,nlines);\r channel->Extend("flood",f);\r channel->SetMode('f', true);\r channel->SetModeParam('f', parameter.c_str(), true);\r return MODEACTION_ALLOW;\r }\r else\r {\r std::string cur_param = channel->GetModeParameter('f');\r parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" +ConvToStr(nsecs);\r if (cur_param == parameter)\r {\r // mode params match\r return MODEACTION_DENY;\r }\r else\r {\r if (((nlines != f->lines) || (nsecs != f->secs)) && ((nsecs > 0) && (nlines > 0)) || (ban != f->ban))\r {\r delete f;\r floodsettings *f = new floodsettings(ban,nsecs,nlines);\r channel->Shrink("flood");\r channel->Extend("flood",f);\r channel->SetModeParam('f', cur_param.c_str(), false);\r channel->SetModeParam('f', parameter.c_str(), true);\r return MODEACTION_ALLOW;\r }\r else\r {\r return MODEACTION_DENY;\r }\r }\r }\r }\r }\r else\r {\r source->WriteServ("608 %s %s :Invalid flood parameter",source->nick,channel->name);\r parameter.clear();\r return MODEACTION_DENY;\r }\r }\r else\r {\r if (channel->GetExt("flood", f))\r {\r DELETE(f);\r channel->Shrink("flood");\r channel->SetMode('f', false);\r return MODEACTION_ALLOW;\r }\r }\r \r return MODEACTION_DENY;\r }\r};\r\rclass ModuleMsgFlood : public Module\r{\r \r MsgFlood* mf;\r \r public:\r \r ModuleMsgFlood(InspIRCd* Me)\r : Module(Me)\r {\r \r mf = new MsgFlood(ServerInstance);\r if (!ServerInstance->AddMode(mf, 'f'))\r throw ModuleException("Could not add new modes!");\r }\r \r void ProcessMessages(userrec* user,chanrec* dest, const std::string &text)\r {\r if (!IS_LOCAL(user) || CHANOPS_EXEMPT(ServerInstance, 'f') && dest->GetStatus(user) == STATUS_OP)\r {\r return;\r }\r\r floodsettings *f;\r if (dest->GetExt("flood", f))\r {\r f->addmessage(user);\r if (f->shouldkick(user))\r {\r /* Youre outttta here! */\r f->clear(user);\r if (f->ban)\r {\r const char* parameters[3];\r parameters[0] = dest->name;\r parameters[1] = "+b";\r parameters[2] = user->MakeWildHost();\r ServerInstance->SendMode(parameters,3,user);\r std::deque<std::string> n;\r /* Propogate the ban to other servers.\r * We dont know what protocol we may be using,\r * so this event is picked up by our protocol\r * module and formed into a ban command that\r * suits the protocol in use.\r */\r n.push_back(dest->name);\r n.push_back("+b");\r n.push_back(user->MakeWildHost());\r Event rmode((char *)&n, NULL, "send_mode");\r rmode.Send(ServerInstance);\r }\r char kickmessage[MAXBUF];\r snprintf(kickmessage, MAXBUF, "Channel flood triggered (limit is %d lines in %d secs)", f->lines, f->secs);\r dest->ServerKickUser(user, kickmessage, true);\r }\r }\r }\r\r virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list)\r {\r if (target_type == TYPE_CHANNEL)\r {\r ProcessMessages(user,(chanrec*)dest,text);\r }\r }\r\r virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list)\r {\r if (target_type == TYPE_CHANNEL)\r {\r ProcessMessages(user,(chanrec*)dest,text);\r }\r }\r\r void OnChannelDelete(chanrec* chan)\r {\r floodsettings* f;\r if (chan->GetExt("flood", f))\r {\r DELETE(f);\r chan->Shrink("flood");\r }\r }\r\r void Implements(char* List)\r {\r List[I_OnChannelDelete] = List[I_OnUserNotice] = List[I_OnUserMessage] = 1;\r }\r\r virtual ~ModuleMsgFlood()\r {\r ServerInstance->Modes->DelMode(mf);\r DELETE(mf);\r }\r \r virtual Version GetVersion()\r {\r return Version(1, 1, 0, 0, VF_COMMON | VF_VENDOR, API_VERSION);\r }\r};\r\rMODULE_INIT(ModuleMsgFlood)\r
\ No newline at end of file
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
+ * Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2007 John Brooks <john.brooks@dereferenced.net>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2006 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
+ *
+ * This file is part of InspIRCd. InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "inspircd.h"
+
+/* $ModDesc: Provides channel mode +f (message flood protection) */
+
+/** Holds flood settings and state for mode +f
+ */
+class floodsettings
+{
+ public:
+ bool ban;
+ unsigned int secs;
+ unsigned int lines;
+ time_t reset;
+ std::map<User*, unsigned int> counters;
+
+ floodsettings(bool a, int b, int c) : ban(a), secs(b), lines(c)
+ {
+ reset = ServerInstance->Time() + secs;
+ }
+
+ bool addmessage(User* who)
+ {
+ if (ServerInstance->Time() > reset)
+ {
+ counters.clear();
+ reset = ServerInstance->Time() + secs;
+ }
+
+ return (++counters[who] >= this->lines);
+ }
+
+ void clear(User* who)
+ {
+ std::map<User*, unsigned int>::iterator iter = counters.find(who);
+ if (iter != counters.end())
+ {
+ counters.erase(iter);
+ }
+ }
+};
+
+/** Handles channel mode +f
+ */
+class MsgFlood : public ModeHandler
+{
+ public:
+ SimpleExtItem<floodsettings> ext;
+ MsgFlood(Module* Creator) : ModeHandler(Creator, "flood", 'f', PARAM_SETONLY, MODETYPE_CHANNEL),
+ ext("messageflood", Creator) { }
+
+ ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
+ {
+ if (adding)
+ {
+ std::string::size_type colon = parameter.find(':');
+ if ((colon == std::string::npos) || (parameter.find('-') != std::string::npos))
+ {
+ source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str());
+ return MODEACTION_DENY;
+ }
+
+ /* Set up the flood parameters for this channel */
+ bool ban = (parameter[0] == '*');
+ unsigned int nlines = ConvToInt(parameter.substr(ban ? 1 : 0, ban ? colon-1 : colon));
+ unsigned int nsecs = ConvToInt(parameter.substr(colon+1));
+
+ if ((nlines<2) || (nsecs<1))
+ {
+ source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str());
+ return MODEACTION_DENY;
+ }
+
+ floodsettings* f = ext.get(channel);
+ if ((f) && (nlines == f->lines) && (nsecs == f->secs) && (ban == f->ban))
+ // mode params match
+ return MODEACTION_DENY;
+
+ ext.set(channel, new floodsettings(ban, nsecs, nlines));
+ parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" + ConvToStr(nsecs);
+ channel->SetModeParam('f', parameter);
+ return MODEACTION_ALLOW;
+ }
+ else
+ {
+ if (!channel->IsModeSet('f'))
+ return MODEACTION_DENY;
+
+ ext.unset(channel);
+ channel->SetModeParam('f', "");
+ return MODEACTION_ALLOW;
+ }
+ }
+};
+
+class ModuleMsgFlood : public Module
+{
+ MsgFlood mf;
+
+ public:
+
+ ModuleMsgFlood()
+ : mf(this)
+ {
+ }
+
+ void init() CXX11_OVERRIDE
+ {
+ ServerInstance->Modules->AddService(mf);
+ ServerInstance->Modules->AddService(mf.ext);
+ ServerInstance->Modules->Attach(I_OnUserPreMessage, this);
+ }
+
+ ModResult ProcessMessages(User* user,Channel* dest, const std::string &text)
+ {
+ if ((!IS_LOCAL(user)) || !dest->IsModeSet('f'))
+ return MOD_RES_PASSTHRU;
+
+ if (ServerInstance->OnCheckExemption(user,dest,"flood") == MOD_RES_ALLOW)
+ return MOD_RES_PASSTHRU;
+
+ floodsettings *f = mf.ext.get(dest);
+ if (f)
+ {
+ if (f->addmessage(user))
+ {
+ /* Youre outttta here! */
+ f->clear(user);
+ if (f->ban)
+ {
+ std::vector<std::string> parameters;
+ parameters.push_back(dest->name);
+ parameters.push_back("+b");
+ parameters.push_back("*!*@" + user->dhost);
+ ServerInstance->Modes->Process(parameters, ServerInstance->FakeClient);
+ }
+
+ const std::string kickMessage = "Channel flood triggered (limit is " + ConvToStr(f->lines) +
+ " in " + ConvToStr(f->secs) + " secs)";
+
+ dest->KickUser(ServerInstance->FakeClient, user, kickMessage);
+
+ return MOD_RES_DENY;
+ }
+ }
+
+ return MOD_RES_PASSTHRU;
+ }
+
+ ModResult OnUserPreMessage(User* user, void* dest, int target_type, std::string& text, char status, CUList& exempt_list, MessageType msgtype) CXX11_OVERRIDE
+ {
+ if (target_type == TYPE_CHANNEL)
+ return ProcessMessages(user,(Channel*)dest,text);
+
+ return MOD_RES_PASSTHRU;
+ }
+
+ void Prioritize()
+ {
+ // we want to be after all modules that might deny the message (e.g. m_muteban, m_noctcp, m_blockcolor, etc.)
+ ServerInstance->Modules->SetPriority(this, I_OnUserPreMessage, PRIORITY_LAST);
+ }
+
+ Version GetVersion() CXX11_OVERRIDE
+ {
+ return Version("Provides channel mode +f (message flood protection)", VF_VENDOR);
+ }
+};
+
+MODULE_INIT(ModuleMsgFlood)
projects / user / henk / code / inspircd.git / blobdiff