1 /* +------------------------------------+
\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 "mode.h"
\r#include "users.h"
\r#include "channels.h"
\r#include "modules.h"
\r#include "u_listmode.h"
\r\r/* $ModDesc: Allows an extended ban (+b) syntax redirecting banned users to another channel */
\r\r/* Originally written by Om, January 2007
\r */
\r\rclass BanRedirectEntry
\r{
\r public:
\r std::string targetchan;
\r std::string banmask;
\r\r BanRedirectEntry(const std::string &target = "", const std::string &mask = "")
\r : targetchan(target), banmask(mask)
\r {
\r }
\r};
\r\rtypedef std::vector<BanRedirectEntry> BanRedirectList;
\rtypedef std::deque<std::string> StringDeque;
\r\rclass BanRedirect : public ModeWatcher
\r{
\r private:
\r InspIRCd* Srv;
\r public:
\r BanRedirect(InspIRCd* Instance)
\r : ModeWatcher(Instance, 'b', MODETYPE_CHANNEL), Srv(Instance)
\r {
\r }
\r\r bool BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string ¶m, bool adding, ModeType type)
\r {
\r /* nick!ident@host -> nick!ident@host
\r * nick!ident@host#chan -> nick!ident@host#chan
\r * nick@host#chan -> nick!*@host#chan
\r * nick!ident#chan -> nick!ident@*#chan
\r * nick#chan -> nick!*@*#chan
\r */
\r \r if(channel && (type == MODETYPE_CHANNEL) && param.length())
\r {
\r BanRedirectList* redirects;
\r \r std::string mask[4];
\r enum { NICK, IDENT, HOST, CHAN } current = NICK;
\r std::string::iterator start_pos = param.begin();
\r long maxbans = channel->GetMaxBans();
\r \r if(channel->bans.size() > static_cast<unsigned>(maxbans))
\r {
\r source->WriteServ("478 %s %s :Channel ban list for %s is full (maximum entries for this channel is %d)", source->nick, channel->name, channel->name, maxbans);
\r return false;
\r }
\r \r for(std::string::iterator curr = start_pos; curr != param.end(); curr++)
\r {
\r switch(*curr)
\r {
\r case '!':
\r mask[current].assign(start_pos, curr);
\r current = IDENT;
\r start_pos = curr+1;
\r break;
\r case '@':
\r mask[current].assign(start_pos, curr);
\r current = HOST;
\r start_pos = curr+1;
\r break;
\r case '#':
\r mask[current].assign(start_pos, curr);
\r current = CHAN;
\r start_pos = curr;
\r break;
\r }
\r }
\r \r if(mask[current].empty())
\r {
\r mask[current].assign(start_pos, param.end());
\r }
\r \r /* nick@host wants to be changed to *!nick@host rather than nick!*@host... */
\r if(mask[NICK].length() && mask[HOST].length() && mask[IDENT].empty())
\r {
\r /* std::string::swap() is fast - it runs in constant time */
\r mask[NICK].swap(mask[IDENT]);
\r }
\r \r for(int i = 0; i < 3; i++)
\r {
\r if(mask[i].empty())
\r {
\r mask[i].assign("*");
\r }
\r }
\r \r param.assign(mask[NICK]).append(1, '!').append(mask[IDENT]).append(1, '@').append(mask[HOST]);
\r \r if(mask[CHAN].length())
\r {
\r if(Srv->IsChannel(mask[CHAN].c_str()))
\r {
\r if(irc::string(channel->name) == irc::string(mask[CHAN].c_str()))
\r {
\r source->WriteServ("690 %s %s :You cannot set a ban redirection to the channel the ban is on", source->nick, channel->name);
\r return false;
\r }
\r else
\r {
\r if(adding)
\r {
\r /* It's a properly valid redirecting ban, and we're adding it */
\r if(!channel->GetExt("banredirects", redirects))
\r {
\r redirects = new BanRedirectList;
\r channel->Extend("banredirects", redirects);
\r }
\r \r /* Here 'param' doesn't have the channel on it yet */
\r redirects->push_back(BanRedirectEntry(mask[CHAN].c_str(), param.c_str()));
\r \r /* Now it does */
\r param.append(mask[CHAN]);
\r }
\r else
\r {
\r /* Removing a ban, if there's no extensible there are no redirecting bans and we're fine. */
\r if(channel->GetExt("banredirects", redirects))
\r {
\r /* But there were, so we need to remove the matching one if there is one */
\r \r for(BanRedirectList::iterator redir = redirects->begin(); redir != redirects->end(); redir++)
\r {
\r /* Ugly as fuck */
\r if((irc::string(redir->targetchan.c_str()) == irc::string(mask[CHAN].c_str())) && (irc::string(redir->banmask.c_str()) == irc::string(param.c_str())))
\r {
\r redirects->erase(redir);
\r \r if(redirects->empty())
\r {
\r DELETE(redirects);
\r channel->Shrink("banredirects");
\r }
\r \r break;
\r }
\r }
\r }
\r \r /* Append the channel so the default +b handler can remove the entry too */
\r param.append(mask[CHAN]);
\r }
\r }
\r }
\r else
\r {
\r source->WriteServ("403 %s %s :Invalid channel name in redirection (%s)", source->nick, channel->name, mask[CHAN].c_str());
\r return false;
\r }
\r }
\r }
\r \r return true;
\r }
\r};
\r\rclass ModuleBanRedirect : public Module
\r{
\r BanRedirect* re;
\r bool nofollow;
\r Module* ExceptionModule;
\r\r public:
\r ModuleBanRedirect(InspIRCd* Me)
\r : Module(Me)
\r {
\r re = new BanRedirect(Me);
\r nofollow = false;
\r \r if(!ServerInstance->AddModeWatcher(re))
\r throw ModuleException("Could not add mode watcher");
\r\r OnRehash(NULL, "");
\r }
\r \r void Implements(char* List)
\r {
\r List[I_OnRehash] = List[I_OnUserPreJoin] = List[I_OnChannelDelete] = List[I_OnCleanup] = 1;
\r }
\r \r virtual void OnChannelDelete(chanrec* chan)
\r {
\r OnCleanup(TYPE_CHANNEL, chan);
\r }
\r \r virtual void OnCleanup(int target_type, void* item)
\r {
\r if(target_type == TYPE_CHANNEL)
\r {
\r chanrec* chan = static_cast<chanrec*>(item);
\r BanRedirectList* redirects;
\r \r if(chan->GetExt("banredirects", redirects))
\r {
\r irc::modestacker modestack(false);
\r StringDeque stackresult;
\r const char* mode_junk[MAXMODES+2];
\r userrec* myhorriblefakeuser = new userrec(ServerInstance);
\r myhorriblefakeuser->SetFd(FD_MAGIC_NUMBER);
\r \r mode_junk[0] = chan->name;
\r \r for(BanRedirectList::iterator i = redirects->begin(); i != redirects->end(); i++)
\r {
\r modestack.Push('b', i->targetchan.insert(0, i->banmask));
\r }
\r \r for(BanRedirectList::iterator i = redirects->begin(); i != redirects->end(); i++)
\r {
\r modestack.PushPlus();
\r modestack.Push('b', i->banmask);
\r }
\r \r while(modestack.GetStackedLine(stackresult))
\r {
\r for(StringDeque::size_type i = 0; i < stackresult.size(); i++)
\r {
\r mode_junk[i+1] = stackresult[i].c_str();
\r }
\r \r ServerInstance->SendMode(mode_junk, stackresult.size() + 1, myhorriblefakeuser);
\r }
\r \r DELETE(myhorriblefakeuser);
\r DELETE(redirects);
\r chan->Shrink("banredirects");
\r }
\r }
\r }
\r\r virtual void OnRehash(userrec* user, const std::string ¶m)
\r {
\r ExceptionModule = ServerInstance->FindModule("m_banexception.so");
\r }
\r\r virtual int OnUserPreJoin(userrec* user, chanrec* chan, const char* cname, std::string &privs)
\r {
\r /* This prevents recursion when a user sets multiple ban redirects in a chain
\r * (thanks Potter)
\r */
\r if (nofollow)
\r return 0;
\r\r /* Return 1 to prevent the join, 0 to allow it */
\r if (chan)
\r {
\r BanRedirectList* redirects;
\r \r if(chan->GetExt("banredirects", redirects))
\r {
\r /* We actually had some ban redirects to check */
\r \r /* This was replaced with user->MakeHostIP() when I had a snprintf(), but MakeHostIP() doesn't seem to add the nick.
\r * Maybe we should have a GetFullIPHost() or something to match GetFullHost() and GetFullRealHost?
\r */
\r\r if (ExceptionModule)
\r {
\r ListModeRequest n(this, ExceptionModule, user, chan);
\r /* Users with ban exceptions are allowed to join without being redirected */
\r if (n.Send())
\r return 0;
\r }
\r\r std::string ipmask(user->nick);
\r ipmask.append(1, '!').append(user->MakeHostIP());
\r \r for(BanRedirectList::iterator redir = redirects->begin(); redir != redirects->end(); redir++)
\r {
\r if(ServerInstance->MatchText(user->GetFullRealHost(), redir->banmask) || ServerInstance->MatchText(user->GetFullHost(), redir->banmask) || ServerInstance->MatchText(ipmask, redir->banmask))
\r {
\r /* tell them they're banned and are being transferred */
\r chanrec* destchan = ServerInstance->FindChan(redir->targetchan);
\r \r if(destchan && ServerInstance->FindModule("m_redirect.so") && destchan->IsModeSet('L') && destchan->limit && (destchan->GetUserCounter() >= destchan->limit))
\r {
\r user->WriteServ("474 %s %s :Cannot join channel (You are banned)", user->nick, chan->name);
\r return 1;
\r }
\r else
\r {
\r user->WriteServ("470 %s :You are banned from %s. You are being automatically redirected to %s", user->nick, chan->name, redir->targetchan.c_str());
\r nofollow = true;
\r chanrec::JoinUser(ServerInstance, user, redir->targetchan.c_str(), false, "", ServerInstance->Time(true));
\r nofollow = false;
\r return 1;
\r }
\r }
\r }
\r }
\r }
\r return 0;
\r }
\r\r virtual ~ModuleBanRedirect()
\r {
\r ServerInstance->Modes->DelModeWatcher(re);
\r DELETE(re);
\r }
\r \r virtual Version GetVersion()
\r {
\r return Version(1, 0, 0, 0, VF_COMMON | VF_VENDOR, API_VERSION);
\r }
\r \r Priority Prioritize()
\r {
\r return (Priority)ServerInstance->PriorityBefore("m_banexception.so");
\r }
\r};
\r\r\rMODULE_INIT(ModuleBanRedirect)
\r