-/* +------------------------------------+\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
\ 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.
+ *
+ * ---------------------------------------------------
+ */
+
+#include "inspircd.h"
+#include "u_listmode.h"
+
+/* $ModDesc: Allows an extended ban (+b) syntax redirecting banned users to another channel */
+/* $ModDep: ../../include/u_listmode.h */
+
+/* Originally written by Om, January 2009
+ */
+
+class BanRedirectEntry
+{
+ public:
+ std::string targetchan;
+ std::string banmask;
+
+ BanRedirectEntry(const std::string &target = "", const std::string &mask = "")
+ : targetchan(target), banmask(mask)
+ {
+ }
+};
+
+typedef std::vector<BanRedirectEntry> BanRedirectList;
+typedef std::deque<std::string> StringDeque;
+
+class BanRedirect : public ModeWatcher
+{
+ public:
+ SimpleExtItem<BanRedirectList> extItem;
+ BanRedirect(Module* parent) : ModeWatcher(parent, 'b', MODETYPE_CHANNEL),
+ extItem("banredirect", parent)
+ {
+ }
+
+ bool BeforeMode(User* source, User* dest, Channel* channel, std::string ¶m, bool adding, ModeType type)
+ {
+ /* nick!ident@host -> nick!ident@host
+ * nick!ident@host#chan -> nick!ident@host#chan
+ * nick@host#chan -> nick!*@host#chan
+ * nick!ident#chan -> nick!ident@*#chan
+ * nick#chan -> nick!*@*#chan
+ */
+
+ if(channel && (type == MODETYPE_CHANNEL) && param.length())
+ {
+ BanRedirectList* redirects;
+
+ std::string mask[4];
+ enum { NICK, IDENT, HOST, CHAN } current = NICK;
+ std::string::iterator start_pos = param.begin();
+ long maxbans = channel->GetMaxBans();
+
+ if (param.length() >= 2 && param[1] == ':')
+ return true;
+
+ if(adding && (channel->bans.size() > static_cast<unsigned>(maxbans)))
+ {
+ source->WriteNumeric(478, "%s %s :Channel ban list for %s is full (maximum entries for this channel is %ld)", source->nick.c_str(), channel->name.c_str(), channel->name.c_str(), maxbans);
+ return false;
+ }
+
+ for(std::string::iterator curr = start_pos; curr != param.end(); curr++)
+ {
+ switch(*curr)
+ {
+ case '!':
+ mask[current].assign(start_pos, curr);
+ current = IDENT;
+ start_pos = curr+1;
+ break;
+ case '@':
+ mask[current].assign(start_pos, curr);
+ current = HOST;
+ start_pos = curr+1;
+ break;
+ case '#':
+ mask[current].assign(start_pos, curr);
+ current = CHAN;
+ start_pos = curr;
+ break;
+ }
+ }
+
+ if(mask[current].empty())
+ {
+ mask[current].assign(start_pos, param.end());
+ }
+
+ /* nick@host wants to be changed to *!nick@host rather than nick!*@host... */
+ if(mask[NICK].length() && mask[HOST].length() && mask[IDENT].empty())
+ {
+ /* std::string::swap() is fast - it runs in constant time */
+ mask[NICK].swap(mask[IDENT]);
+ }
+
+ for(int i = 0; i < 3; i++)
+ {
+ if(mask[i].empty())
+ {
+ mask[i].assign("*");
+ }
+ }
+
+ param.assign(mask[NICK]).append(1, '!').append(mask[IDENT]).append(1, '@').append(mask[HOST]);
+
+ if(mask[CHAN].length())
+ {
+ if (IS_LOCAL(source))
+ {
+ if (!ServerInstance->IsChannel(mask[CHAN].c_str(), ServerInstance->Config->Limits.ChanMax))
+ {
+ source->WriteNumeric(403, "%s %s :Invalid channel name in redirection (%s)", source->nick.c_str(), channel->name.c_str(), mask[CHAN].c_str());
+ return false;
+ }
+
+ Channel *c = ServerInstance->FindChan(mask[CHAN].c_str());
+ if (!c)
+ {
+ source->WriteNumeric(690, "%s :Target channel %s must exist to be set as a redirect.",source->nick.c_str(),mask[CHAN].c_str());
+ return false;
+ }
+ else if (c->GetPrefixValue(source) < OP_VALUE)
+ {
+ source->WriteNumeric(690, "%s :You must be opped on %s to set it as a redirect.",source->nick.c_str(), mask[CHAN].c_str());
+ return false;
+ }
+
+ if (assign(channel->name) == mask[CHAN])
+ {
+ source->WriteNumeric(690, "%s %s :You cannot set a ban redirection to the channel the ban is on", source->nick.c_str(), channel->name.c_str());
+ return false;
+ }
+ }
+
+ if(adding)
+ {
+ /* It's a properly valid redirecting ban, and we're adding it */
+ redirects = extItem.get(channel);
+ if (!redirects)
+ {
+ redirects = new BanRedirectList;
+ extItem.set(channel, redirects);
+ }
+
+ /* Here 'param' doesn't have the channel on it yet */
+ redirects->push_back(BanRedirectEntry(mask[CHAN].c_str(), param.c_str()));
+
+ /* Now it does */
+ param.append(mask[CHAN]);
+ }
+ else
+ {
+ /* Removing a ban, if there's no extensible there are no redirecting bans and we're fine. */
+ redirects = extItem.get(channel);
+ if (redirects)
+ {
+ /* But there were, so we need to remove the matching one if there is one */
+
+ for(BanRedirectList::iterator redir = redirects->begin(); redir != redirects->end(); redir++)
+ {
+ /* Ugly as fuck */
+ if((irc::string(redir->targetchan.c_str()) == irc::string(mask[CHAN].c_str())) && (irc::string(redir->banmask.c_str()) == irc::string(param.c_str())))
+ {
+ redirects->erase(redir);
+
+ if(redirects->empty())
+ {
+ extItem.unset(channel);
+ }
+
+ break;
+ }
+ }
+ }
+
+ /* Append the channel so the default +b handler can remove the entry too */
+ param.append(mask[CHAN]);
+ }
+ }
+ }
+
+ return true;
+ }
+};
+
+class ModuleBanRedirect : public Module
+{
+ BanRedirect re;
+ bool nofollow;
+ Module* ExceptionModule;
+
+ public:
+ ModuleBanRedirect()
+ : re(this)
+ {
+ nofollow = false;
+
+ if(!ServerInstance->Modes->AddModeWatcher(&re))
+ throw ModuleException("Could not add mode watcher");
+
+ OnRehash(NULL);
+
+ ServerInstance->Extensions.Register(&re.extItem);
+ Implementation list[] = { I_OnRehash, I_OnUserPreJoin, I_OnChannelDelete };
+ ServerInstance->Modules->Attach(list, this, 3);
+ }
+
+ virtual void OnChannelDelete(Channel* chan)
+ {
+ OnCleanup(TYPE_CHANNEL, chan);
+ }
+
+ virtual void OnCleanup(int target_type, void* item)
+ {
+ if(target_type == TYPE_CHANNEL)
+ {
+ Channel* chan = static_cast<Channel*>(item);
+ BanRedirectList* redirects = re.extItem.get(chan);
+
+ if(redirects)
+ {
+ irc::modestacker modestack(false);
+ StringDeque stackresult;
+ std::vector<std::string> mode_junk;
+ mode_junk.push_back(chan->name);
+
+ for(BanRedirectList::iterator i = redirects->begin(); i != redirects->end(); i++)
+ {
+ modestack.Push('b', i->targetchan.insert(0, i->banmask));
+ }
+
+ for(BanRedirectList::iterator i = redirects->begin(); i != redirects->end(); i++)
+ {
+ modestack.PushPlus();
+ modestack.Push('b', i->banmask);
+ }
+
+ while(modestack.GetStackedLine(stackresult))
+ {
+ mode_junk.insert(mode_junk.end(), stackresult.begin(), stackresult.end());
+ ServerInstance->SendMode(mode_junk, ServerInstance->FakeClient);
+ mode_junk.erase(mode_junk.begin() + 1, mode_junk.end());
+ }
+ }
+ }
+ }
+
+ virtual void OnRehash(User* user)
+ {
+ ExceptionModule = ServerInstance->Modules->Find("m_banexception.so");
+ }
+
+ virtual ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
+ {
+ /* This prevents recursion when a user sets multiple ban redirects in a chain
+ * (thanks Potter)
+ */
+ if (nofollow)
+ return MOD_RES_PASSTHRU;
+
+ /* Return 1 to prevent the join, 0 to allow it */
+ if (chan)
+ {
+ BanRedirectList* redirects = re.extItem.get(chan);
+
+ if (redirects)
+ {
+ /* We actually had some ban redirects to check */
+
+ /* This was replaced with user->MakeHostIP() when I had a snprintf(), but MakeHostIP() doesn't seem to add the nick.
+ * Maybe we should have a GetFullIPHost() or something to match GetFullHost() and GetFullRealHost?
+ */
+
+ ModResult result;
+ FIRST_MOD_RESULT(OnCheckChannelBan, result, (user, chan));
+ if (result == MOD_RES_ALLOW)
+ {
+ // they have a ban exception
+ return MOD_RES_PASSTHRU;
+ }
+
+ std::string ipmask(user->nick);
+ ipmask.append(1, '!').append(user->MakeHostIP());
+
+ for(BanRedirectList::iterator redir = redirects->begin(); redir != redirects->end(); redir++)
+ {
+ if(InspIRCd::Match(user->GetFullRealHost(), redir->banmask) || InspIRCd::Match(user->GetFullHost(), redir->banmask) || InspIRCd::MatchCIDR(ipmask, redir->banmask))
+ {
+ /* tell them they're banned and are being transferred */
+ Channel* destchan = ServerInstance->FindChan(redir->targetchan);
+ std::string destlimit;
+
+ if (destchan)
+ destlimit = destchan->GetModeParameter('l');
+
+ if(destchan && ServerInstance->Modules->Find("m_redirect.so") && destchan->IsModeSet('L') && !destlimit.empty() && (destchan->GetUserCounter() >= atoi(destlimit.c_str())))
+ {
+ user->WriteNumeric(474, "%s %s :Cannot join channel (You are banned)", user->nick.c_str(), chan->name.c_str());
+ return MOD_RES_ALLOW;
+ }
+ else
+ {
+ user->WriteNumeric(474, "%s %s :Cannot join channel (You are banned)", user->nick.c_str(), chan->name.c_str());
+ user->WriteNumeric(470, "%s %s %s :You are banned from this channel, so you are automatically transfered to the redirected channel.", user->nick.c_str(), chan->name.c_str(), redir->targetchan.c_str());
+ nofollow = true;
+ Channel::JoinUser(user, redir->targetchan.c_str(), false, "", false, ServerInstance->Time());
+ nofollow = false;
+ return MOD_RES_ALLOW;
+ }
+ }
+ }
+ }
+ }
+ return MOD_RES_PASSTHRU;
+ }
+
+ virtual ~ModuleBanRedirect()
+ {
+ }
+
+ virtual Version GetVersion()
+ {
+ return Version("Allows an extended ban (+b) syntax redirecting banned users to another channel", VF_COMMON|VF_VENDOR);
+ }
+
+ void Prioritize()
+ {
+ Module* banex = ServerInstance->Modules->Find("m_banexception.so");
+ ServerInstance->Modules->SetPriority(this, I_OnUserPreJoin, PRIORITY_BEFORE, &banex);
+ }
+};
+
+MODULE_INIT(ModuleBanRedirect)
projects / user / henk / code / inspircd.git / blobdiff