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/* +------------------------------------+
* | 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 "xline.h"
enum FilterFlags
{
FLAG_NOOPERS = 1,
FLAG_PART = 2,
FLAG_QUIT = 4,
FLAG_PRIVMSG = 8,
FLAG_NOTICE = 16
};
class FilterResult : public classbase
{
public:
std::string freeform;
std::string reason;
std::string action;
long gline_time;
std::string flags;
bool flag_no_opers;
bool flag_part_message;
bool flag_quit_message;
bool flag_privmsg;
bool flag_notice;
FilterResult(const std::string free, const std::string &rea, const std::string &act, long gt, const std::string &fla) : freeform(free), reason(rea),
action(act), gline_time(gt), flags(fla)
{
this->FillFlags(flags);
}
int FillFlags(const std::string &fl)
{
flags = fl;
flag_no_opers = flag_part_message = flag_quit_message = flag_privmsg = flag_notice = false;
size_t x = 0;
for (std::string::const_iterator n = flags.begin(); n != flags.end(); ++n, ++x)
{
switch (*n)
{
case 'o':
flag_no_opers = true;
break;
case 'P':
flag_part_message = true;
break;
case 'q':
flag_quit_message = true;
break;
case 'p':
flag_privmsg = true;
break;
case 'n':
flag_notice = true;
break;
case '*':
flag_no_opers = flag_part_message = flag_quit_message =
flag_privmsg = flag_notice = true;
break;
default:
return x;
break;
}
}
return 0;
}
FilterResult()
{
}
virtual ~FilterResult()
{
}
};
class cmd_filter;
class FilterBase : public Module
{
cmd_filter* filtcommand;
int flags;
public:
FilterBase(InspIRCd* Me, const std::string &source);
virtual ~FilterBase();
virtual void Implements(char* List);
virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list);
virtual FilterResult* FilterMatch(userrec* user, const std::string &text, int flags) = 0;
virtual bool DeleteFilter(const std::string &freeform) = 0;
virtual void SyncFilters(Module* proto, void* opaque) = 0;
virtual void SendFilter(Module* proto, void* opaque, FilterResult* iter);
virtual std::pair<bool, std::string> AddFilter(const std::string &freeform, const std::string &type, const std::string &reason, long duration, const std::string &flags) = 0;
virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list);
virtual void OnRehash(userrec* user, const std::string ¶meter);
virtual Version GetVersion();
std::string EncodeFilter(FilterResult* filter);
FilterResult DecodeFilter(const std::string &data);
virtual void OnSyncOtherMetaData(Module* proto, void* opaque, bool displayable = false);
virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata);
virtual int OnStats(char symbol, userrec* user, string_list &results) = 0;
virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line);
bool AppliesToMe(userrec* user, FilterResult* filter, int flags);
};
class cmd_filter : public command_t
{
FilterBase* Base;
public:
cmd_filter(FilterBase* f, InspIRCd* Me, const std::string &source) : command_t(Me, "FILTER", 'o', 1), Base(f)
{
this->source = source;
this->syntax = "<filter-definition> <type> <flags> [<gline-duration>] :<reason>";
}
CmdResult Handle(const char** parameters, int pcnt, userrec *user)
{
if (pcnt == 1)
{
/* Deleting a filter */
if (Base->DeleteFilter(parameters[0]))
{
user->WriteServ("NOTICE %s :*** Deleted filter '%s'", user->nick, parameters[0]);
return CMD_SUCCESS;
}
else
{
user->WriteServ("NOTICE %s :*** Filter '%s' not found on list.", user->nick, parameters[0]);
return CMD_FAILURE;
}
}
else
{
/* Adding a filter */
if (pcnt >= 4)
{
std::string freeform = parameters[0];
std::string type = parameters[1];
std::string flags = parameters[2];
std::string reason;
long duration = 0;
if ((type != "gline") && (type != "none") && (type != "block") && (type != "kill") && (type != "silent"))
{
user->WriteServ("NOTICE %s :*** Invalid filter type '%s'. Supported types are 'gline', 'none', 'block', 'silent' and 'kill'.", user->nick, freeform.c_str());
return CMD_FAILURE;
}
if (type == "gline")
{
if (pcnt >= 5)
{
duration = ServerInstance->Duration(parameters[3]);
reason = parameters[4];
}
else
{
this->TooFewParams(user, " When setting a gline type filter, a gline duration must be specified as the third parameter.");
return CMD_FAILURE;
}
}
else
{
reason = parameters[3];
}
std::pair<bool, std::string> result = Base->AddFilter(freeform, type, reason, duration, flags);
if (result.first)
{
user->WriteServ("NOTICE %s :*** Added filter '%s', type '%s'%s%s, flags '%s', reason: '%s'", user->nick, freeform.c_str(),
type.c_str(), (duration ? " duration: " : ""), (duration ? parameters[3] : ""),
flags.c_str(), reason.c_str());
return CMD_SUCCESS;
}
else
{
user->WriteServ("NOTICE %s :*** Filter '%s' could not be added: %s", user->nick, freeform.c_str(), result.second.c_str());
return CMD_FAILURE;
}
}
else
{
this->TooFewParams(user, ".");
return CMD_FAILURE;
}
}
}
void TooFewParams(userrec* user, const std::string &extra_text)
{
user->WriteServ("NOTICE %s :*** Not enough parameters%s", user->nick, extra_text.c_str());
}
};
bool FilterBase::AppliesToMe(userrec* user, FilterResult* filter, int flags)
{
if ((flags & FLAG_NOOPERS) && (filter->flag_no_opers) && IS_OPER(user))
return false;
if ((flags & FLAG_PRIVMSG) && (!filter->flag_privmsg))
return false;
if ((flags & FLAG_NOTICE) && (!filter->flag_notice))
return false;
if ((flags & FLAG_QUIT) && (!filter->flag_quit_message))
return false;
if ((flags & FLAG_PART) && (!filter->flag_part_message))
return false;
return true;
}
FilterBase::FilterBase(InspIRCd* Me, const std::string &source) : Module(Me)
{
filtcommand = new cmd_filter(this, Me, source);
ServerInstance->AddCommand(filtcommand);
}
FilterBase::~FilterBase()
{
}
void FilterBase::Implements(char* List)
{
List[I_OnPreCommand] = List[I_OnStats] = List[I_OnSyncOtherMetaData] = List[I_OnDecodeMetaData] = List[I_OnUserPreMessage] = List[I_OnUserPreNotice] = List[I_OnRehash] = 1;
}
int FilterBase::OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
{
flags = FLAG_PRIVMSG;
return OnUserPreNotice(user,dest,target_type,text,status,exempt_list);
}
int FilterBase::OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
{
if (!flags)
flags = FLAG_NOTICE;
/* Leave ulines alone */
if ((ServerInstance->ULine(user->server)) || (!IS_LOCAL(user)))
return 0;
FilterResult* f = this->FilterMatch(user, text, flags);
if (f)
{
std::string target = "";
if (target_type == TYPE_USER)
{
userrec* t = (userrec*)dest;
target = std::string(t->nick);
}
else if (target_type == TYPE_CHANNEL)
{
chanrec* t = (chanrec*)dest;
target = std::string(t->name);
}
if (f->action == "block")
{
ServerInstance->WriteOpers(std::string("FILTER: ")+user->nick+" had their message filtered, target was "+target+": "+f->reason);
user->WriteServ("NOTICE "+std::string(user->nick)+" :Your message has been filtered and opers notified: "+f->reason);
}
if (f->action == "silent")
{
user->WriteServ("NOTICE "+std::string(user->nick)+" :Your message has been filtered: "+f->reason);
}
if (f->action == "kill")
{
userrec::QuitUser(ServerInstance,user,"Filtered: "+f->reason);
}
if (f->action == "gline")
{
if (ServerInstance->XLines->add_gline(f->gline_time, ServerInstance->Config->ServerName, f->reason.c_str(), user->MakeHostIP()))
{
ServerInstance->XLines->apply_lines(APPLY_GLINES);
FOREACH_MOD(I_OnAddGLine,OnAddGLine(f->gline_time, NULL, f->reason, user->MakeHostIP()));
}
}
ServerInstance->Log(DEFAULT,"FILTER: "+std::string(user->nick)+std::string(" had their message filtered, target was ")+target+": "+f->reason+" Action: "+f->action);
return 1;
}
return 0;
}
int FilterBase::OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
{
flags = 0;
if ((validated == 1) && (IS_LOCAL(user)))
{
std::string checkline;
int replacepoint = 0;
bool parting = false;
if (command == "QUIT")
{
/* QUIT with no reason: nothing to do */
if (pcnt < 1)
return 0;
checkline = parameters[0];
replacepoint = 0;
parting = false;
flags = FLAG_QUIT;
}
else if (command == "PART")
{
/* PART with no reason: nothing to do */
if (pcnt < 2)
return 0;
checkline = parameters[1];
replacepoint = 1;
parting = true;
flags = FLAG_PART;
}
else
/* We're only messing with PART and QUIT */
return 0;
FilterResult* f = NULL;
if (flags)
f = this->FilterMatch(user, checkline, flags);
if (!f)
/* PART or QUIT reason doesnt match a filter */
return 0;
/* We cant block a part or quit, so instead we change the reason to 'Reason filtered' */
command_t* c = ServerInstance->Parser->GetHandler(command);
if (c)
{
const char* params[127];
for (int item = 0; item < pcnt; item++)
params[item] = parameters[item];
params[replacepoint] = "Reason filtered";
/* We're blocking, OR theyre quitting and its a KILL action
* (we cant kill someone whos already quitting, so filter them anyway)
*/
if ((f->action == "block") || (((!parting) && (f->action == "kill"))) || (f->action == "silent"))
{
c->Handle(params, pcnt, user);
return 1;
}
else
{
/* Are they parting, if so, kill is applicable */
if ((parting) && (f->action == "kill"))
{
user->SetWriteError("Filtered: "+f->reason);
/* This WriteServ causes the write error to be applied.
* Its not safe to kill here with QuitUser in a PreCommand handler,
* so we do it this way, which is safe just about anywhere.
*/
user->WriteServ("NOTICE %s :*** Your PART message was filtered: %s", user->nick, f->reason.c_str());
}
if (f->action == "gline")
{
/* Note: We gline *@IP so that if their host doesnt resolve the gline still applies. */
std::string wild = "*@";
wild.append(user->GetIPString());
if (ServerInstance->XLines->add_gline(f->gline_time, ServerInstance->Config->ServerName, f->reason.c_str(), wild.c_str()))
{
ServerInstance->XLines->apply_lines(APPLY_GLINES);
FOREACH_MOD(I_OnAddGLine,OnAddGLine(f->gline_time, NULL, f->reason, user->MakeHostIP()));
}
}
return 1;
}
}
return 0;
}
return 0;
}
void FilterBase::OnRehash(userrec* user, const std::string ¶meter)
{
}
Version FilterBase::GetVersion()
{
return Version(1,1,0,2,VF_VENDOR|VF_COMMON,API_VERSION);
}
std::string FilterBase::EncodeFilter(FilterResult* filter)
{
std::ostringstream stream;
std::string x = filter->freeform;
/* Hax to allow spaces in the freeform without changing the design of the irc protocol */
for (std::string::iterator n = x.begin(); n != x.end(); n++)
if (*n == ' ')
*n = '\7';
stream << x << " " << filter->action << " " << (filter->flags.empty() ? "-" : filter->flags) << " " << filter->gline_time << " :" << filter->reason;
return stream.str();
}
FilterResult FilterBase::DecodeFilter(const std::string &data)
{
FilterResult res;
irc::tokenstream tokens(data);
tokens.GetToken(res.freeform);
tokens.GetToken(res.action);
tokens.GetToken(res.flags);
if (res.flags == "-")
res.flags = "";
res.FillFlags(res.flags);
tokens.GetToken(res.gline_time);
tokens.GetToken(res.reason);
/* Hax to allow spaces in the freeform without changing the design of the irc protocol */
for (std::string::iterator n = res.freeform.begin(); n != res.freeform.end(); n++)
if (*n == '\7')
*n = ' ';
return res;
}
void FilterBase::OnSyncOtherMetaData(Module* proto, void* opaque, bool displayable)
{
this->SyncFilters(proto, opaque);
}
void FilterBase::SendFilter(Module* proto, void* opaque, FilterResult* iter)
{
proto->ProtoSendMetaData(opaque, TYPE_OTHER, NULL, "filter", EncodeFilter(iter));
}
void FilterBase::OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
{
if ((target_type == TYPE_OTHER) && (extname == "filter"))
{
FilterResult data = DecodeFilter(extdata);
this->AddFilter(data.freeform, data.action, data.reason, data.gline_time, data.flags);
}
}
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