diff options
Diffstat (limited to 'src/modules/m_messageflood.cpp')
| -rw-r--r-- | src/modules/m_messageflood.cpp | 305 |
1 files changed, 304 insertions, 1 deletions
diff --git a/src/modules/m_messageflood.cpp b/src/modules/m_messageflood.cpp index e5263719b..a942262ed 100644 --- a/src/modules/m_messageflood.cpp +++ b/src/modules/m_messageflood.cpp @@ -1 +1,304 @@ -/* +------------------------------------+
* | 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 "channels.h"
#include "modules.h"
/* $ModDesc: Provides channel mode +f (message flood protection) */
/** Holds flood settings and state for mode +f
*/
class floodsettings : public classbase
{
public:
bool ban;
int secs;
int lines;
time_t reset;
std::map<userrec*,int> counters;
floodsettings() : ban(0), secs(0), lines(0) {};
floodsettings(bool a, int b, int c) : ban(a), secs(b), lines(c)
{
reset = time(NULL) + secs;
};
void addmessage(userrec* who)
{
std::map<userrec*,int>::iterator iter = counters.find(who);
if (iter != counters.end())
{
iter->second++;
}
else
{
counters[who] = 1;
}
if (time(NULL) > reset)
{
counters.clear();
reset = time(NULL) + secs;
}
}
bool shouldkick(userrec* who)
{
std::map<userrec*,int>::iterator iter = counters.find(who);
if (iter != counters.end())
{
return (iter->second >= this->lines);
}
else return false;
}
void clear(userrec* who)
{
std::map<userrec*,int>::iterator iter = counters.find(who);
if (iter != counters.end())
{
counters.erase(iter);
}
}
};
/** Handles channel mode +f
*/
class MsgFlood : public ModeHandler
{
public:
MsgFlood(InspIRCd* Instance) : ModeHandler(Instance, 'f', 1, 0, false, MODETYPE_CHANNEL, false) { }
ModePair ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter)
{
floodsettings* x;
if (channel->GetExt("flood",x))
return std::make_pair(true, (x->ban ? "*" : "")+ConvToStr(x->lines)+":"+ConvToStr(x->secs));
else
return std::make_pair(false, parameter);
}
bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
{
/* When TS is equal, the alphabetically later one wins */
return (their_param < our_param);
}
ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding)
{
floodsettings *f;
if (adding)
{
char ndata[MAXBUF];
char* data = ndata;
strlcpy(ndata,parameter.c_str(),MAXBUF);
char* lines = data;
char* secs = NULL;
bool ban = false;
if (*data == '*')
{
ban = true;
lines++;
}
else
{
ban = false;
}
while (*data)
{
if (*data == ':')
{
*data = 0;
data++;
secs = data;
break;
}
else data++;
}
if (secs)
{
/* Set up the flood parameters for this channel */
int nlines = atoi(lines);
int nsecs = atoi(secs);
if ((nlines<1) || (nsecs<1))
{
source->WriteServ("608 %s %s :Invalid flood parameter",source->nick,channel->name);
parameter.clear();
return MODEACTION_DENY;
}
else
{
if (!channel->GetExt("flood", f))
{
parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" +ConvToStr(nsecs);
floodsettings *f = new floodsettings(ban,nsecs,nlines);
channel->Extend("flood",f);
channel->SetMode('f', true);
channel->SetModeParam('f', parameter.c_str(), true);
return MODEACTION_ALLOW;
}
else
{
std::string cur_param = channel->GetModeParameter('f');
parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" +ConvToStr(nsecs);
if (cur_param == parameter)
{
// mode params match
return MODEACTION_DENY;
}
else
{
if (((nlines != f->lines) || (nsecs != f->secs)) && ((nsecs > 0) && (nlines > 0)) || (ban != f->ban))
{
delete f;
floodsettings *f = new floodsettings(ban,nsecs,nlines);
channel->Shrink("flood");
channel->Extend("flood",f);
channel->SetModeParam('f', cur_param.c_str(), false);
channel->SetModeParam('f', parameter.c_str(), true);
return MODEACTION_ALLOW;
}
else
{
return MODEACTION_DENY;
}
}
}
}
}
else
{
source->WriteServ("608 %s %s :Invalid flood parameter",source->nick,channel->name);
parameter.clear();
return MODEACTION_DENY;
}
}
else
{
if (channel->GetExt("flood", f))
{
DELETE(f);
channel->Shrink("flood");
channel->SetMode('f', false);
return MODEACTION_ALLOW;
}
}
return MODEACTION_DENY;
}
};
class ModuleMsgFlood : public Module
{
MsgFlood* mf;
public:
ModuleMsgFlood(InspIRCd* Me)
: Module(Me)
{
mf = new MsgFlood(ServerInstance);
if (!ServerInstance->AddMode(mf, 'f'))
throw ModuleException("Could not add new modes!");
}
void ProcessMessages(userrec* user,chanrec* dest, const std::string &text)
{
if (!IS_LOCAL(user) || CHANOPS_EXEMPT(ServerInstance, 'f') && dest->GetStatus(user) == STATUS_OP)
{
return;
}
floodsettings *f;
if (dest->GetExt("flood", f))
{
f->addmessage(user);
if (f->shouldkick(user))
{
/* Youre outttta here! */
f->clear(user);
if (f->ban)
{
const char* parameters[3];
parameters[0] = dest->name;
parameters[1] = "+b";
parameters[2] = user->MakeWildHost();
ServerInstance->SendMode(parameters,3,user);
std::deque<std::string> n;
/* Propogate the ban to other servers.
* We dont know what protocol we may be using,
* so this event is picked up by our protocol
* module and formed into a ban command that
* suits the protocol in use.
*/
n.push_back(dest->name);
n.push_back("+b");
n.push_back(user->MakeWildHost());
Event rmode((char *)&n, NULL, "send_mode");
rmode.Send(ServerInstance);
}
char kickmessage[MAXBUF];
snprintf(kickmessage, MAXBUF, "Channel flood triggered (limit is %d lines in %d secs)", f->lines, f->secs);
dest->ServerKickUser(user, kickmessage, true);
}
}
}
virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list)
{
if (target_type == TYPE_CHANNEL)
{
ProcessMessages(user,(chanrec*)dest,text);
}
}
virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list)
{
if (target_type == TYPE_CHANNEL)
{
ProcessMessages(user,(chanrec*)dest,text);
}
}
void OnChannelDelete(chanrec* chan)
{
floodsettings* f;
if (chan->GetExt("flood", f))
{
DELETE(f);
chan->Shrink("flood");
}
}
void Implements(char* List)
{
List[I_OnChannelDelete] = List[I_OnUserNotice] = List[I_OnUserMessage] = 1;
}
virtual ~ModuleMsgFlood()
{
ServerInstance->Modes->DelMode(mf);
DELETE(mf);
}
virtual Version GetVersion()
{
return Version(1, 1, 0, 0, VF_COMMON | VF_VENDOR, API_VERSION);
}
};
MODULE_INIT(ModuleMsgFlood)
\ 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 "channels.h" +#include "modules.h" + +/* $ModDesc: Provides channel mode +f (message flood protection) */ + +/** Holds flood settings and state for mode +f + */ +class floodsettings : public classbase +{ + public: + bool ban; + int secs; + int lines; + time_t reset; + std::map<userrec*,int> counters; + + floodsettings() : ban(0), secs(0), lines(0) {}; + floodsettings(bool a, int b, int c) : ban(a), secs(b), lines(c) + { + reset = time(NULL) + secs; + }; + + void addmessage(userrec* who) + { + std::map<userrec*,int>::iterator iter = counters.find(who); + if (iter != counters.end()) + { + iter->second++; + } + else + { + counters[who] = 1; + } + if (time(NULL) > reset) + { + counters.clear(); + reset = time(NULL) + secs; + } + } + + bool shouldkick(userrec* who) + { + std::map<userrec*,int>::iterator iter = counters.find(who); + if (iter != counters.end()) + { + return (iter->second >= this->lines); + } + else return false; + } + + void clear(userrec* who) + { + std::map<userrec*,int>::iterator iter = counters.find(who); + if (iter != counters.end()) + { + counters.erase(iter); + } + } +}; + +/** Handles channel mode +f + */ +class MsgFlood : public ModeHandler +{ + public: + MsgFlood(InspIRCd* Instance) : ModeHandler(Instance, 'f', 1, 0, false, MODETYPE_CHANNEL, false) { } + + ModePair ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter) + { + floodsettings* x; + if (channel->GetExt("flood",x)) + return std::make_pair(true, (x->ban ? "*" : "")+ConvToStr(x->lines)+":"+ConvToStr(x->secs)); + else + return std::make_pair(false, parameter); + } + + bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel) + { + /* When TS is equal, the alphabetically later one wins */ + return (their_param < our_param); + } + + ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding) + { + floodsettings *f; + + if (adding) + { + char ndata[MAXBUF]; + char* data = ndata; + strlcpy(ndata,parameter.c_str(),MAXBUF); + char* lines = data; + char* secs = NULL; + bool ban = false; + if (*data == '*') + { + ban = true; + lines++; + } + else + { + ban = false; + } + while (*data) + { + if (*data == ':') + { + *data = 0; + data++; + secs = data; + break; + } + else data++; + } + if (secs) + { + /* Set up the flood parameters for this channel */ + int nlines = atoi(lines); + int nsecs = atoi(secs); + if ((nlines<1) || (nsecs<1)) + { + source->WriteServ("608 %s %s :Invalid flood parameter",source->nick,channel->name); + parameter.clear(); + return MODEACTION_DENY; + } + else + { + if (!channel->GetExt("flood", f)) + { + parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" +ConvToStr(nsecs); + floodsettings *f = new floodsettings(ban,nsecs,nlines); + channel->Extend("flood",f); + channel->SetMode('f', true); + channel->SetModeParam('f', parameter.c_str(), true); + return MODEACTION_ALLOW; + } + else + { + std::string cur_param = channel->GetModeParameter('f'); + parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" +ConvToStr(nsecs); + if (cur_param == parameter) + { + // mode params match + return MODEACTION_DENY; + } + else + { + if (((nlines != f->lines) || (nsecs != f->secs)) && ((nsecs > 0) && (nlines > 0)) || (ban != f->ban)) + { + delete f; + floodsettings *f = new floodsettings(ban,nsecs,nlines); + channel->Shrink("flood"); + channel->Extend("flood",f); + channel->SetModeParam('f', cur_param.c_str(), false); + channel->SetModeParam('f', parameter.c_str(), true); + return MODEACTION_ALLOW; + } + else + { + return MODEACTION_DENY; + } + } + } + } + } + else + { + source->WriteServ("608 %s %s :Invalid flood parameter",source->nick,channel->name); + parameter.clear(); + return MODEACTION_DENY; + } + } + else + { + if (channel->GetExt("flood", f)) + { + DELETE(f); + channel->Shrink("flood"); + channel->SetMode('f', false); + return MODEACTION_ALLOW; + } + } + + return MODEACTION_DENY; + } +}; + +class ModuleMsgFlood : public Module +{ + + MsgFlood* mf; + + public: + + ModuleMsgFlood(InspIRCd* Me) + : Module(Me) + { + + mf = new MsgFlood(ServerInstance); + if (!ServerInstance->AddMode(mf, 'f')) + throw ModuleException("Could not add new modes!"); + } + + void ProcessMessages(userrec* user,chanrec* dest, const std::string &text) + { + if (!IS_LOCAL(user) || CHANOPS_EXEMPT(ServerInstance, 'f') && dest->GetStatus(user) == STATUS_OP) + { + return; + } + + floodsettings *f; + if (dest->GetExt("flood", f)) + { + f->addmessage(user); + if (f->shouldkick(user)) + { + /* Youre outttta here! */ + f->clear(user); + if (f->ban) + { + const char* parameters[3]; + parameters[0] = dest->name; + parameters[1] = "+b"; + parameters[2] = user->MakeWildHost(); + ServerInstance->SendMode(parameters,3,user); + std::deque<std::string> n; + /* Propogate the ban to other servers. + * We dont know what protocol we may be using, + * so this event is picked up by our protocol + * module and formed into a ban command that + * suits the protocol in use. + */ + n.push_back(dest->name); + n.push_back("+b"); + n.push_back(user->MakeWildHost()); + Event rmode((char *)&n, NULL, "send_mode"); + rmode.Send(ServerInstance); + } + char kickmessage[MAXBUF]; + snprintf(kickmessage, MAXBUF, "Channel flood triggered (limit is %d lines in %d secs)", f->lines, f->secs); + dest->ServerKickUser(user, kickmessage, true); + } + } + } + + virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list) + { + if (target_type == TYPE_CHANNEL) + { + ProcessMessages(user,(chanrec*)dest,text); + } + } + + virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list) + { + if (target_type == TYPE_CHANNEL) + { + ProcessMessages(user,(chanrec*)dest,text); + } + } + + void OnChannelDelete(chanrec* chan) + { + floodsettings* f; + if (chan->GetExt("flood", f)) + { + DELETE(f); + chan->Shrink("flood"); + } + } + + void Implements(char* List) + { + List[I_OnChannelDelete] = List[I_OnUserNotice] = List[I_OnUserMessage] = 1; + } + + virtual ~ModuleMsgFlood() + { + ServerInstance->Modes->DelMode(mf); + DELETE(mf); + } + + virtual Version GetVersion() + { + return Version(1, 1, 0, 0, VF_COMMON | VF_VENDOR, API_VERSION); + } +}; + +MODULE_INIT(ModuleMsgFlood) |