/* +------------------------------------+ * | 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 #include "socketengine.h" #include "xline.h" #include "bancache.h" #include "commands/cmd_whowas.h" typedef unsigned int uniq_id_t; class sent { uniq_id_t uniq_id; uniq_id_t* array; void init() { if (!array) array = new uniq_id_t[ServerInstance->SE->GetMaxFds()]; memset(array, 0, ServerInstance->SE->GetMaxFds() * sizeof(uniq_id_t)); uniq_id++; } public: sent() : uniq_id(static_cast(-1)), array(NULL) {} inline uniq_id_t operator++() { if (++uniq_id == 0) init(); return uniq_id; } inline uniq_id_t& operator[](int i) { return array[i]; } ~sent() { delete[] array; } }; static sent already_sent; std::string User::ProcessNoticeMasks(const char *sm) { bool adding = true, oldadding = false; const char *c = sm; std::string output; while (c && *c) { switch (*c) { case '+': adding = true; break; case '-': adding = false; break; case '*': for (unsigned char d = 'A'; d <= 'z'; d++) { if (ServerInstance->SNO->IsEnabled(d)) { if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding)) { if ((oldadding != adding) || (!output.length())) output += (adding ? '+' : '-'); this->SetNoticeMask(d, adding); output += d; } } oldadding = adding; } break; default: if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c))) { if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding)) { if ((oldadding != adding) || (!output.length())) output += (adding ? '+' : '-'); this->SetNoticeMask(*c, adding); output += *c; } } else this->WriteNumeric(ERR_UNKNOWNSNOMASK, "%s %c :is unknown snomask char to me", this->nick.c_str(), *c); oldadding = adding; break; } *c++; } std::string s = this->FormatNoticeMasks(); if (s.length() == 0) { this->modes[UM_SNOMASK] = false; } return output; } void User::StartDNSLookup() { try { bool cached = false; const char* sip = this->GetIPString(); UserResolver *res_reverse; QueryType resolvtype = this->client_sa.sa.sa_family == AF_INET6 ? DNS_QUERY_PTR6 : DNS_QUERY_PTR4; res_reverse = new UserResolver(this, sip, resolvtype, cached); ServerInstance->AddResolver(res_reverse, cached); } catch (CoreException& e) { ServerInstance->Logs->Log("USERS", DEBUG,"Error in resolver: %s",e.GetReason()); } } bool User::IsNoticeMaskSet(unsigned char sm) { if (!isalpha(sm)) return false; return (snomasks[sm-65]); } void User::SetNoticeMask(unsigned char sm, bool value) { if (!isalpha(sm)) return; snomasks[sm-65] = value; } const char* User::FormatNoticeMasks() { static char data[MAXBUF]; int offset = 0; for (int n = 0; n < 64; n++) { if (snomasks[n]) data[offset++] = n+65; } data[offset] = 0; return data; } bool User::IsModeSet(unsigned char m) { if (!isalpha(m)) return false; return (modes[m-65]); } void User::SetMode(unsigned char m, bool value) { if (!isalpha(m)) return; modes[m-65] = value; } const char* User::FormatModes(bool showparameters) { static char data[MAXBUF]; std::string params; int offset = 0; for (unsigned char n = 0; n < 64; n++) { if (modes[n]) { data[offset++] = n + 65; ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER); if (showparameters && mh && mh->GetNumParams(true)) { std::string p = mh->GetUserParameter(this); if (p.length()) params.append(" ").append(p); } } } data[offset] = 0; strlcat(data, params.c_str(), MAXBUF); return data; } void User::DecrementModes() { ServerInstance->Logs->Log("USERS", DEBUG, "DecrementModes()"); for (unsigned char n = 'A'; n <= 'z'; n++) { if (modes[n-65]) { ServerInstance->Logs->Log("USERS", DEBUG,"DecrementModes() found mode %c", n); ModeHandler* mh = ServerInstance->Modes->FindMode(n, MODETYPE_USER); if (mh) { ServerInstance->Logs->Log("USERS", DEBUG,"Found handler %c and call ChangeCount", n); mh->ChangeCount(-1); } } } } User::User(const std::string &uid) { server = ServerInstance->Config->ServerName; age = ServerInstance->Time(); Penalty = 0; lastping = signon = idle_lastmsg = nping = registered = 0; bytes_in = bytes_out = cmds_in = cmds_out = 0; quietquit = quitting = exempt = dns_done = false; fd = -1; server_sa.sa.sa_family = AF_UNSPEC; client_sa.sa.sa_family = AF_UNSPEC; AllowedPrivs = AllowedOperCommands = NULL; if (uid.empty()) uuid = ServerInstance->GetUID(); else uuid = uid; ServerInstance->Logs->Log("USERS", DEBUG,"New UUID for user: %s (%s)", uuid.c_str(), uid.empty() ? "allocated new" : "used remote"); user_hash::iterator finduuid = ServerInstance->Users->uuidlist->find(uuid); if (finduuid == ServerInstance->Users->uuidlist->end()) (*ServerInstance->Users->uuidlist)[uuid] = this; else throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor"); } User::~User() { if (uuid.length()) ServerInstance->Logs->Log("USERS", ERROR, "User destructor for %s called without cull", uuid.c_str()); } const std::string& User::MakeHost() { if (!this->cached_makehost.empty()) return this->cached_makehost; char nhost[MAXBUF]; /* This is much faster than snprintf */ char* t = nhost; for(const char* n = ident.c_str(); *n; n++) *t++ = *n; *t++ = '@'; for(const char* n = host.c_str(); *n; n++) *t++ = *n; *t = 0; this->cached_makehost.assign(nhost); return this->cached_makehost; } const std::string& User::MakeHostIP() { if (!this->cached_hostip.empty()) return this->cached_hostip; char ihost[MAXBUF]; /* This is much faster than snprintf */ char* t = ihost; for(const char* n = ident.c_str(); *n; n++) *t++ = *n; *t++ = '@'; for(const char* n = this->GetIPString(); *n; n++) *t++ = *n; *t = 0; this->cached_hostip = ihost; return this->cached_hostip; } const std::string User::GetFullHost() { if (!this->cached_fullhost.empty()) return this->cached_fullhost; char result[MAXBUF]; char* t = result; for(const char* n = nick.c_str(); *n; n++) *t++ = *n; *t++ = '!'; for(const char* n = ident.c_str(); *n; n++) *t++ = *n; *t++ = '@'; for(const char* n = dhost.c_str(); *n; n++) *t++ = *n; *t = 0; this->cached_fullhost = result; return this->cached_fullhost; } char* User::MakeWildHost() { static char nresult[MAXBUF]; char* t = nresult; *t++ = '*'; *t++ = '!'; *t++ = '*'; *t++ = '@'; for(const char* n = dhost.c_str(); *n; n++) *t++ = *n; *t = 0; return nresult; } const std::string User::GetFullRealHost() { if (!this->cached_fullrealhost.empty()) return this->cached_fullrealhost; char fresult[MAXBUF]; char* t = fresult; for(const char* n = nick.c_str(); *n; n++) *t++ = *n; *t++ = '!'; for(const char* n = ident.c_str(); *n; n++) *t++ = *n; *t++ = '@'; for(const char* n = host.c_str(); *n; n++) *t++ = *n; *t = 0; this->cached_fullrealhost = fresult; return this->cached_fullrealhost; } bool User::IsInvited(const irc::string &channel) { time_t now = ServerInstance->Time(); InvitedList::iterator safei; for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i) { if (channel == i->first) { if (i->second != 0 && now > i->second) { /* Expired invite, remove it. */ safei = i; --i; invites.erase(safei); continue; } return true; } } return false; } InvitedList* User::GetInviteList() { time_t now = ServerInstance->Time(); /* Weed out expired invites here. */ InvitedList::iterator safei; for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i) { if (i->second != 0 && now > i->second) { /* Expired invite, remove it. */ safei = i; --i; invites.erase(safei); } } return &invites; } void User::InviteTo(const irc::string &channel, time_t invtimeout) { time_t now = ServerInstance->Time(); if (invtimeout != 0 && now > invtimeout) return; /* Don't add invites that are expired from the get-go. */ for (InvitedList::iterator i = invites.begin(); i != invites.end(); ++i) { if (channel == i->first) { if (i->second != 0 && invtimeout > i->second) { i->second = invtimeout; } return; } } invites.push_back(std::make_pair(channel, invtimeout)); } void User::RemoveInvite(const irc::string &channel) { for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++) { if (channel == i->first) { invites.erase(i); return; } } } bool User::HasModePermission(unsigned char mode, ModeType type) { if (!IS_LOCAL(this)) return true; if (!IS_OPER(this)) return false; if (mode < 'A' || mode > ('A' + 64)) return false; return ((type == MODETYPE_USER ? AllowedUserModes : AllowedChanModes))[(mode - 'A')]; } bool User::HasPermission(const std::string &command) { /* * users on remote servers can completely bypass all permissions based checks. * This prevents desyncs when one server has different type/class tags to another. * That having been said, this does open things up to the possibility of source changes * allowing remote kills, etc - but if they have access to the src, they most likely have * access to the conf - so it's an end to a means either way. */ if (!IS_LOCAL(this)) return true; // are they even an oper at all? if (!IS_OPER(this)) { return false; } if (!AllowedOperCommands) return false; if (AllowedOperCommands->find(command) != AllowedOperCommands->end()) return true; else if (AllowedOperCommands->find("*") != AllowedOperCommands->end()) return true; return false; } bool User::HasPrivPermission(const std::string &privstr, bool noisy) { if (!IS_LOCAL(this)) { ServerInstance->Logs->Log("PRIVS", DEBUG, "Remote (yes)"); return true; } if (!IS_OPER(this)) { if (noisy) this->WriteServ("NOTICE %s :You are not an oper", this->nick.c_str()); return false; } if (!AllowedPrivs) { if (noisy) this->WriteServ("NOTICE %s :Privset empty(!?)", this->nick.c_str()); return false; } if (AllowedPrivs->find(privstr) != AllowedPrivs->end()) { return true; } else if (AllowedPrivs->find("*") != AllowedPrivs->end()) { return true; } if (noisy) this->WriteServ("NOTICE %s :Oper type %s does not have access to priv %s", this->nick.c_str(), this->oper.c_str(), privstr.c_str()); return false; } void User::OnDataReady() { if (quitting) return; if (MyClass && recvq.length() > MyClass->GetRecvqMax() && !HasPrivPermission("users/flood/increased-buffers")) { ServerInstance->Users->QuitUser(this, "RecvQ exceeded"); ServerInstance->SNO->WriteToSnoMask('a', "User %s RecvQ of %lu exceeds connect class maximum of %lu", nick.c_str(), (unsigned long)recvq.length(), MyClass->GetRecvqMax()); } unsigned long sendqmax = ULONG_MAX; if (MyClass && !HasPrivPermission("users/flood/increased-buffers")) sendqmax = MyClass->GetSendqSoftMax(); int penaltymax = MyClass->GetPenaltyThreshold(); if (penaltymax == 0 || HasPrivPermission("users/flood/no-fakelag")) penaltymax = INT_MAX; while (Penalty < penaltymax && getSendQSize() < sendqmax) { std::string line; line.reserve(MAXBUF); std::string::size_type qpos = 0; while (qpos < recvq.length()) { char c = recvq[qpos++]; switch (c) { case '\0': c = ' '; break; case '\r': continue; case '\n': goto eol_found; } if (line.length() < MAXBUF - 2) line.push_back(c); } // if we got here, the recvq ran out before we found a newline return; eol_found: // just found a newline. Terminate the string, and pull it out of recvq recvq = recvq.substr(qpos); // TODO should this be moved to when it was inserted in recvq? ServerInstance->stats->statsRecv += qpos; this->bytes_in += qpos; this->cmds_in++; ServerInstance->Parser->ProcessBuffer(line, this); if (quitting) return; } // Add pseudo-penalty so that we continue processing after sendq recedes if (Penalty == 0 && getSendQSize() >= sendqmax) Penalty++; } void User::AddWriteBuf(const std::string &data) { // Don't bother sending text to remote users! if (IS_REMOTE(this)) return; if (!quitting && MyClass && getSendQSize() + data.length() > MyClass->GetSendqHardMax() && !HasPrivPermission("users/flood/increased-buffers")) { /* * Quit the user FIRST, because otherwise we could recurse * here and hit the same limit. */ ServerInstance->Users->QuitUser(this, "SendQ exceeded"); ServerInstance->SNO->WriteToSnoMask('a', "User %s SendQ exceeds connect class maximum of %lu", nick.c_str(), MyClass->GetSendqHardMax()); return; } // We still want to append data to the sendq of a quitting user, // e.g. their ERROR message that says 'closing link' WriteData(data); } void User::OnError(BufferedSocketError) { ServerInstance->Users->QuitUser(this, getError()); } CullResult User::cull() { if (!quitting) ServerInstance->Users->QuitUser(this, "Culled without QuitUser"); if (uuid.empty()) { ServerInstance->Logs->Log("USERS", DEBUG, "User culled twice? UUID empty"); return Extensible::cull(); } PurgeEmptyChannels(); if (IS_LOCAL(this)) { if (fd != INT_MAX) Close(); std::vector::iterator x = find(ServerInstance->Users->local_users.begin(),ServerInstance->Users->local_users.end(),this); if (x != ServerInstance->Users->local_users.end()) ServerInstance->Users->local_users.erase(x); else ServerInstance->Logs->Log("USERS", DEBUG, "Failed to remove user from vector"); } if (this->AllowedOperCommands) { delete AllowedOperCommands; AllowedOperCommands = NULL; } if (this->AllowedPrivs) { delete AllowedPrivs; AllowedPrivs = NULL; } this->InvalidateCache(); this->DecrementModes(); if (client_sa.sa.sa_family != AF_UNSPEC) ServerInstance->Users->RemoveCloneCounts(this); ServerInstance->Users->uuidlist->erase(uuid); uuid.clear(); return Extensible::cull(); } void User::Oper(const std::string &opertype, const std::string &opername) { if (this->IsModeSet('o')) this->UnOper(); this->modes[UM_OPERATOR] = 1; this->WriteServ("MODE %s :+o", this->nick.c_str()); FOREACH_MOD(I_OnOper, OnOper(this, opertype)); ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')", this->nick.c_str(), this->ident.c_str(), this->host.c_str(), irc::Spacify(opertype.c_str()), opername.c_str()); this->WriteNumeric(381, "%s :You are now %s %s", this->nick.c_str(), strchr("aeiouAEIOU", *opertype.c_str()) ? "an" : "a", irc::Spacify(opertype.c_str())); ServerInstance->Logs->Log("OPER", DEFAULT, "%s!%s@%s opered as type: %s", this->nick.c_str(), this->ident.c_str(), this->host.c_str(), opertype.c_str()); this->oper.assign(opertype, 0, 512); ServerInstance->Users->all_opers.push_back(this); /* * This might look like it's in the wrong place. * It is *not*! * * For multi-network servers, we may not have the opertypes of the remote server, but we still want to mark the user as an oper of that type. * -- w00t */ TagIndex::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper.c_str()); if (iter_opertype != ServerInstance->Config->opertypes.end()) { if (AllowedOperCommands) AllowedOperCommands->clear(); else AllowedOperCommands = new std::set; if (AllowedPrivs) AllowedPrivs->clear(); else AllowedPrivs = new std::set; AllowedUserModes.reset(); AllowedChanModes.reset(); this->AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want. std::string myclass, mycmd, mypriv; irc::spacesepstream Classes(iter_opertype->second->getString("classes")); while (Classes.GetToken(myclass)) { TagIndex::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass.c_str()); if (iter_operclass != ServerInstance->Config->operclass.end()) { /* Process commands */ irc::spacesepstream CommandList(iter_operclass->second->getString("commands")); while (CommandList.GetToken(mycmd)) { this->AllowedOperCommands->insert(mycmd); } irc::spacesepstream PrivList(iter_operclass->second->getString("privs")); while (PrivList.GetToken(mypriv)) { this->AllowedPrivs->insert(mypriv); } for (unsigned char* c = (unsigned char*)iter_operclass->second->getString("usermodes").c_str(); *c; ++c) { if (*c == '*') { this->AllowedUserModes.set(); } else { this->AllowedUserModes[*c - 'A'] = true; } } for (unsigned char* c = (unsigned char*)iter_operclass->second->getString("chanmodes").c_str(); *c; ++c) { if (*c == '*') { this->AllowedChanModes.set(); } else { this->AllowedChanModes[*c - 'A'] = true; } } } } } FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype, opername)); } void User::UnOper() { if (IS_OPER(this)) { /* * unset their oper type (what IS_OPER checks). * note, order is important - this must come before modes as -o attempts * to call UnOper. -- w00t */ this->oper.clear(); /* Remove all oper only modes from the user when the deoper - Bug #466*/ std::string moderemove("-"); for (unsigned char letter = 'A'; letter <= 'z'; letter++) { ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER); if (mh && mh->NeedsOper()) moderemove += letter; } std::vector parameters; parameters.push_back(this->nick); parameters.push_back(moderemove); ServerInstance->Parser->CallHandler("MODE", parameters, this); /* remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 */ ServerInstance->Users->all_opers.remove(this); if (AllowedOperCommands) { delete AllowedOperCommands; AllowedOperCommands = NULL; } if (AllowedPrivs) { delete AllowedPrivs; AllowedPrivs = NULL; } AllowedUserModes.reset(); AllowedChanModes.reset(); this->modes[UM_OPERATOR] = 0; } } /* adds or updates an entry in the whowas list */ void User::AddToWhoWas() { Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so"); if (whowas) { WhowasRequest req(NULL, whowas, WhowasRequest::WHOWAS_ADD); req.user = this; req.Send(); } } /* * Check class restrictions */ void User::CheckClass() { ConnectClass* a = this->MyClass; if ((!a) || (a->type == CC_DENY)) { ServerInstance->Users->QuitUser(this, "Unauthorised connection"); return; } else if ((a->GetMaxLocal()) && (ServerInstance->Users->LocalCloneCount(this) > a->GetMaxLocal())) { ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)"); ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString()); return; } else if ((a->GetMaxGlobal()) && (ServerInstance->Users->GlobalCloneCount(this) > a->GetMaxGlobal())) { ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)"); ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString()); return; } this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout; } bool User::CheckLines(bool doZline) { const char* check[] = { "G" , "K", (doZline) ? "Z" : NULL, NULL }; if (!this->exempt) { for (int n = 0; check[n]; ++n) { XLine *r = ServerInstance->XLines->MatchesLine(check[n], this); if (r) { r->Apply(this); return true; } } } return false; } void User::FullConnect() { ServerInstance->stats->statsConnects++; this->idle_lastmsg = ServerInstance->Time(); /* * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT. * At the time AddClient is called, we don't have a resolved host, by here we probably do - which * may put the user into a totally seperate class with different restrictions! so we *must* check again. * Don't remove this! -- w00t */ this->SetClass(); /* Check the password, if one is required by the user's connect class. * This CANNOT be in CheckClass(), because that is called prior to PASS as well! */ if (MyClass && !MyClass->pass.empty()) { if (ServerInstance->PassCompare(this, MyClass->pass.c_str(), password.c_str(), MyClass->hash.c_str())) { ServerInstance->Users->QuitUser(this, "Invalid password"); return; } } if (this->CheckLines()) return; this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network.c_str()); this->WriteNumeric(RPL_WELCOME, "%s :Welcome to the %s IRC Network %s!%s@%s",this->nick.c_str(), ServerInstance->Config->Network.c_str(), this->nick.c_str(), this->ident.c_str(), this->host.c_str()); this->WriteNumeric(RPL_YOURHOSTIS, "%s :Your host is %s, running version InspIRCd-2.0",this->nick.c_str(),ServerInstance->Config->ServerName.c_str()); this->WriteNumeric(RPL_SERVERCREATED, "%s :This server was created %s %s", this->nick.c_str(), __TIME__, __DATE__); this->WriteNumeric(RPL_SERVERVERSION, "%s %s InspIRCd-2.0 %s %s %s", this->nick.c_str(), ServerInstance->Config->ServerName.c_str(), ServerInstance->Modes->UserModeList().c_str(), ServerInstance->Modes->ChannelModeList().c_str(), ServerInstance->Modes->ParaModeList().c_str()); ServerInstance->Config->Send005(this); this->WriteNumeric(RPL_YOURUUID, "%s %s :your unique ID", this->nick.c_str(), this->uuid.c_str()); this->ShowMOTD(); /* Now registered */ if (ServerInstance->Users->unregistered_count) ServerInstance->Users->unregistered_count--; /* Trigger LUSERS output, give modules a chance too */ ModResult MOD_RESULT; std::string command("LUSERS"); std::vector parameters; FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, "LUSERS")); if (!MOD_RESULT) ServerInstance->CallCommandHandler(command, parameters, this); /* * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff * for a user that doesn't exist yet. */ FOREACH_MOD(I_OnUserConnect,OnUserConnect(this)); this->registered = REG_ALL; FOREACH_MOD(I_OnPostConnect,OnPostConnect(this)); ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]", this->GetServerPort(), this->nick.c_str(), this->ident.c_str(), this->host.c_str(), this->GetIPString(), this->fullname.c_str()); ServerInstance->Logs->Log("BANCACHE", DEBUG, "BanCache: Adding NEGATIVE hit for %s", this->GetIPString()); ServerInstance->BanCache->AddHit(this->GetIPString(), "", ""); } /** User::UpdateNick() * re-allocates a nick in the user_hash after they change nicknames, * returns a pointer to the new user as it may have moved */ User* User::UpdateNickHash(const char* New) { //user_hash::iterator newnick; user_hash::iterator oldnick = ServerInstance->Users->clientlist->find(this->nick); if (!irc::string(this->nick.c_str()).compare(New)) return oldnick->second; if (oldnick == ServerInstance->Users->clientlist->end()) return NULL; /* doesnt exist */ User* olduser = oldnick->second; ServerInstance->Users->clientlist->erase(oldnick); (*(ServerInstance->Users->clientlist))[New] = olduser; return olduser; } void User::InvalidateCache() { /* Invalidate cache */ cached_fullhost.clear(); cached_hostip.clear(); cached_makehost.clear(); cached_fullrealhost.clear(); } bool User::ForceNickChange(const char* newnick) { ModResult MOD_RESULT; this->InvalidateCache(); ServerInstance->NICKForced.set(this, 1); FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick)); ServerInstance->NICKForced.set(this, 0); if (MOD_RESULT == MOD_RES_DENY) { ServerInstance->stats->statsCollisions++; return false; } std::deque dummy; Command* nickhandler = ServerInstance->Parser->GetHandler("NICK"); if (nickhandler) // wtfbbq, when would this not be here { std::vector parameters; parameters.push_back(newnick); ServerInstance->NICKForced.set(this, 1); bool result = (ServerInstance->Parser->CallHandler("NICK", parameters, this) == CMD_SUCCESS); ServerInstance->NICKForced.set(this, 0); return result; } // Unreachable, we hope return false; } int User::GetServerPort() { switch (this->server_sa.sa.sa_family) { case AF_INET6: return htons(this->server_sa.in6.sin6_port); case AF_INET: return htons(this->server_sa.in4.sin_port); } return 0; } const char* User::GetCIDRMask(int range) { static char buf[44]; if (range < 0) throw "Negative range, sorry, no."; /* * Original code written by Oliver Lupton (Om). * Integrated by me. Thanks. :) -- w00t */ switch (this->client_sa.sa.sa_family) { case AF_INET6: { /* unsigned char s6_addr[16]; */ struct in6_addr v6; int i, bytestozero, extrabits; char buffer[40]; if(range > 128) throw "CIDR mask width greater than address width (IPv6, 128 bit)"; /* To create the CIDR mask we want to set all the bits after 'range' bits of the address * to zero. This means the last (128 - range) bits of the address must be set to zero. * Hence this number divided by 8 is the number of whole bytes from the end of the address * which must be set to zero. */ bytestozero = (128 - range) / 8; /* Some of the least significant bits of the next most significant byte may also have to * be zeroed. The number of bits is the remainder of the above division. */ extrabits = (128 - range) % 8; /* Populate our working struct with the parts of the user's IP which are required in the * final CIDR mask. Set all the subsequent bytes to zero. * (16 - bytestozero) is the number of bytes which must be populated with actual IP data. */ for(i = 0; i < (16 - bytestozero); i++) { v6.s6_addr[i] = client_sa.in6.sin6_addr.s6_addr[i]; } /* And zero all the remaining bytes in the IP. */ for(; i < 16; i++) { v6.s6_addr[i] = 0; } /* And finally, zero the extra bits required. */ v6.s6_addr[15 - bytestozero] = (v6.s6_addr[15 - bytestozero] >> extrabits) << extrabits; snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET6, &v6, buffer, 40), range); return buf; } break; case AF_INET: { struct in_addr v4; char buffer[16]; if (range > 32) throw "CIDR mask width greater than address width (IPv4, 32 bit)"; /* Users already have a sockaddr* pointer (User::ip) which contains either a v4 or v6 structure */ v4.s_addr = client_sa.in4.sin_addr.s_addr; /* To create the CIDR mask we want to set all the bits after 'range' bits of the address * to zero. This means the last (32 - range) bits of the address must be set to zero. * This is done by shifting the value right and then back left by (32 - range) bits. */ if(range > 0) { v4.s_addr = ntohl(v4.s_addr); v4.s_addr = (v4.s_addr >> (32 - range)) << (32 - range); v4.s_addr = htonl(v4.s_addr); } else { /* a range of zero would cause a 32 bit value to be shifted by 32 bits. * this has undefined behaviour, but for CIDR purposes the resulting mask * from a.b.c.d/0 is 0.0.0.0/0 */ v4.s_addr = 0; } snprintf(buf, 44, "%s/%d", inet_ntop(AF_INET, &v4, buffer, 16), range); return buf; } break; } return ""; // unused, but oh well } const char* User::GetIPString() { int port; if (cachedip.empty()) { irc::sockets::satoap(&client_sa, cachedip, port); /* IP addresses starting with a : on irc are a Bad Thing (tm) */ if (cachedip.c_str()[0] == ':') cachedip.insert(0,1,'0'); } return cachedip.c_str(); } bool User::SetClientIP(const char* sip) { this->cachedip = ""; return irc::sockets::aptosa(sip, 0, &client_sa); } static std::string wide_newline("\r\n"); void User::Write(const std::string& text) { if (!ServerInstance->SE->BoundsCheckFd(this)) return; if (text.length() > MAXBUF - 2) { // this should happen rarely or never. Crop the string at 512 and try again. std::string try_again = text.substr(0, MAXBUF - 2); Write(try_again); return; } ServerInstance->Logs->Log("USEROUTPUT", DEBUG,"C[%d] O %s", this->GetFd(), text.c_str()); this->AddWriteBuf(text); this->AddWriteBuf(wide_newline); ServerInstance->stats->statsSent += text.length() + 2; this->bytes_out += text.length() + 2; this->cmds_out++; } /** Write() */ void User::Write(const char *text, ...) { va_list argsPtr; char textbuffer[MAXBUF]; va_start(argsPtr, text); vsnprintf(textbuffer, MAXBUF, text, argsPtr); va_end(argsPtr); this->Write(std::string(textbuffer)); } void User::WriteServ(const std::string& text) { this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str()); } /** WriteServ() * Same as Write(), except `text' is prefixed with `:server.name '. */ void User::WriteServ(const char* text, ...) { va_list argsPtr; char textbuffer[MAXBUF]; va_start(argsPtr, text); vsnprintf(textbuffer, MAXBUF, text, argsPtr); va_end(argsPtr); this->WriteServ(std::string(textbuffer)); } void User::WriteNumeric(unsigned int numeric, const char* text, ...) { va_list argsPtr; char textbuffer[MAXBUF]; va_start(argsPtr, text); vsnprintf(textbuffer, MAXBUF, text, argsPtr); va_end(argsPtr); this->WriteNumeric(numeric, std::string(textbuffer)); } void User::WriteNumeric(unsigned int numeric, const std::string &text) { char textbuffer[MAXBUF]; ModResult MOD_RESULT; FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text)); if (MOD_RESULT == MOD_RES_DENY) return; snprintf(textbuffer,MAXBUF,":%s %03u %s",ServerInstance->Config->ServerName.c_str(), numeric, text.c_str()); this->Write(std::string(textbuffer)); } void User::WriteFrom(User *user, const std::string &text) { char tb[MAXBUF]; snprintf(tb,MAXBUF,":%s %s",user->GetFullHost().c_str(),text.c_str()); this->Write(std::string(tb)); } /* write text from an originating user to originating user */ void User::WriteFrom(User *user, const char* text, ...) { va_list argsPtr; char textbuffer[MAXBUF]; va_start(argsPtr, text); vsnprintf(textbuffer, MAXBUF, text, argsPtr); va_end(argsPtr); this->WriteFrom(user, std::string(textbuffer)); } /* write text to an destination user from a source user (e.g. user privmsg) */ void User::WriteTo(User *dest, const char *data, ...) { char textbuffer[MAXBUF]; va_list argsPtr; va_start(argsPtr, data); vsnprintf(textbuffer, MAXBUF, data, argsPtr); va_end(argsPtr); this->WriteTo(dest, std::string(textbuffer)); } void User::WriteTo(User *dest, const std::string &data) { dest->WriteFrom(this, data); } void User::WriteCommon(const char* text, ...) { char textbuffer[MAXBUF]; va_list argsPtr; if (this->registered != REG_ALL || quitting) return; int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str()); va_start(argsPtr, text); vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr); va_end(argsPtr); this->WriteCommonRaw(std::string(textbuffer), true); } void User::WriteCommonExcept(const char* text, ...) { char textbuffer[MAXBUF]; va_list argsPtr; if (this->registered != REG_ALL || quitting) return; int len = snprintf(textbuffer,MAXBUF,":%s ",this->GetFullHost().c_str()); va_start(argsPtr, text); vsnprintf(textbuffer + len, MAXBUF - len, text, argsPtr); va_end(argsPtr); this->WriteCommonRaw(std::string(textbuffer), false); } void User::WriteCommonRaw(const std::string &line, bool include_self) { if (this->registered != REG_ALL || quitting) return; uniq_id_t uniq_id = ++already_sent; UserChanList include_c(chans); std::map exceptions; exceptions[this] = include_self; FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions)); for (std::map::iterator i = exceptions.begin(); i != exceptions.end(); ++i) { User* u = i->first; if (IS_LOCAL(u) && !u->quitting) { already_sent[u->fd] = uniq_id; if (i->second) u->Write(line); } } for (UCListIter v = include_c.begin(); v != include_c.end(); ++v) { Channel* c = *v; const UserMembList* ulist = c->GetUsers(); for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++) { User* u = i->first; if (IS_LOCAL(u) && !u->quitting && already_sent[u->fd] != uniq_id) { already_sent[u->fd] = uniq_id; u->Write(line); } } } } void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text) { char tb1[MAXBUF]; char tb2[MAXBUF]; if (this->registered != REG_ALL) return; uniq_id_t uniq_id = ++already_sent; snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),normal_text.c_str()); snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost().c_str(),oper_text.c_str()); std::string out1 = tb1; std::string out2 = tb2; UserChanList include_c(chans); std::map exceptions; FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions)); for (std::map::iterator i = exceptions.begin(); i != exceptions.end(); ++i) { User* u = i->first; if (IS_LOCAL(u) && !u->quitting) { already_sent[u->fd] = uniq_id; if (i->second) u->Write(IS_OPER(u) ? out2 : out1); } } for (UCListIter v = include_c.begin(); v != include_c.end(); ++v) { const UserMembList* ulist = (*v)->GetUsers(); for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++) { User* u = i->first; if (IS_LOCAL(u) && !u->quitting && (already_sent[u->fd] != uniq_id)) { already_sent[u->fd] = uniq_id; u->Write(IS_OPER(u) ? out2 : out1); } } } } void User::WriteWallOps(const std::string &text) { std::string wallop("WALLOPS :"); wallop.append(text); for (std::vector::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++) { User* t = *i; if (t->IsModeSet('w')) this->WriteTo(t,wallop); } } void User::WriteWallOps(const char* text, ...) { if (!IS_LOCAL(this)) return; char textbuffer[MAXBUF]; va_list argsPtr; va_start(argsPtr, text); vsnprintf(textbuffer, MAXBUF, text, argsPtr); va_end(argsPtr); this->WriteWallOps(std::string(textbuffer)); } /* return 0 or 1 depending if users u and u2 share one or more common channels * (used by QUIT, NICK etc which arent channel specific notices) * * The old algorithm in 1.0 for this was relatively inefficient, iterating over * the first users channels then the second users channels within the outer loop, * therefore it was a maximum of x*y iterations (upon returning 0 and checking * all possible iterations). However this new function instead checks against the * channel's userlist in the inner loop which is a std::map * and saves us time as we already know what pointer value we are after. * Don't quote me on the maths as i am not a mathematician or computer scientist, * but i believe this algorithm is now x+(log y) maximum iterations instead. */ bool User::SharesChannelWith(User *other) { if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL)) return false; /* Outer loop */ for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++) { /* Eliminate the inner loop (which used to be ~equal in size to the outer loop) * by replacing it with a map::find which *should* be more efficient */ if ((*i)->HasUser(other)) return true; } return false; } bool User::ChangeName(const char* gecos) { if (!this->fullname.compare(gecos)) return true; if (IS_LOCAL(this)) { ModResult MOD_RESULT; FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (this,gecos)); if (MOD_RESULT == MOD_RES_DENY) return false; FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos)); } this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos); return true; } void User::DoHostCycle(const std::string &quitline) { char buffer[MAXBUF]; if (!ServerInstance->Config->CycleHosts) return; uniq_id_t silent_id = ++already_sent; uniq_id_t seen_id = ++already_sent; UserChanList include_c(chans); std::map exceptions; FOREACH_MOD(I_OnBuildNeighborList,OnBuildNeighborList(this, include_c, exceptions)); for (std::map::iterator i = exceptions.begin(); i != exceptions.end(); ++i) { User* u = i->first; if (IS_LOCAL(u) && !u->quitting) { if (i->second) { already_sent[u->fd] = seen_id; u->Write(quitline); } else { already_sent[u->fd] = silent_id; } } } for (UCListIter v = include_c.begin(); v != include_c.end(); ++v) { Channel* c = *v; snprintf(buffer, MAXBUF, ":%s JOIN %s", GetFullHost().c_str(), c->name.c_str()); std::string joinline(buffer); std::string modeline = ServerInstance->Modes->ModeString(this, c); if (modeline.length() > 0) { snprintf(buffer, MAXBUF, ":%s MODE %s +%s", GetFullHost().c_str(), c->name.c_str(), modeline.c_str()); modeline = buffer; } const UserMembList *ulist = c->GetUsers(); for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++) { User* u = i->first; if (u == this || !IS_LOCAL(u)) continue; if (already_sent[u->fd] == silent_id) continue; if (already_sent[u->fd] != seen_id) { u->Write(quitline); already_sent[i->first->fd] = seen_id; } u->Write(joinline); if (modeline.length() > 0) u->Write(modeline); } } } bool User::ChangeDisplayedHost(const char* shost) { if (dhost == shost) return true; if (IS_LOCAL(this)) { ModResult MOD_RESULT; FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (this,shost)); if (MOD_RESULT == MOD_RES_DENY) return false; } FOREACH_MOD(I_OnChangeHost, OnChangeHost(this,shost)); std::string quitstr = ":" + GetFullHost() + " QUIT :Changing host"; /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */ this->dhost.assign(shost, 0, 64); this->InvalidateCache(); this->DoHostCycle(quitstr); if (IS_LOCAL(this)) this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s %s :is now your displayed host",this->nick.c_str(),this->dhost.c_str()); return true; } bool User::ChangeIdent(const char* newident) { if (this->ident == newident) return true; FOREACH_MOD(I_OnChangeIdent, OnChangeIdent(this,newident)); std::string quitstr = ":" + GetFullHost() + " QUIT :Changing ident"; this->ident.assign(newident, 0, ServerInstance->Config->Limits.IdentMax + 1); this->InvalidateCache(); this->DoHostCycle(quitstr); return true; } void User::SendAll(const char* command, const char* text, ...) { char textbuffer[MAXBUF]; char formatbuffer[MAXBUF]; va_list argsPtr; va_start(argsPtr, text); vsnprintf(textbuffer, MAXBUF, text, argsPtr); va_end(argsPtr); snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost().c_str(), command, textbuffer); std::string fmt = formatbuffer; for (std::vector::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); i++) { (*i)->Write(fmt); } } std::string User::ChannelList(User* source, bool spy) { std::string list; for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++) { Channel* c = *i; /* If the target is the sender, neither +p nor +s is set, or * the channel contains the user, it is not a spy channel */ if (spy != (source == this || !(c->IsModeSet('p') || c->IsModeSet('s')) || c->HasUser(source))) list.append(c->GetPrefixChar(this)).append(c->name).append(" "); } return list; } void User::SplitChanList(User* dest, const std::string &cl) { std::string line; std::ostringstream prefix; std::string::size_type start, pos, length; prefix << this->nick << " " << dest->nick << " :"; line = prefix.str(); int namelen = ServerInstance->Config->ServerName.length() + 6; for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1) { length = (pos == std::string::npos) ? cl.length() : pos; if (line.length() + namelen + length - start > 510) { ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str()); line = prefix.str(); } if(pos == std::string::npos) { line.append(cl.substr(start, length - start)); break; } else { line.append(cl.substr(start, length - start + 1)); } } if (line.length()) { ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str()); } } /* * Sets a user's connection class. * If the class name is provided, it will be used. Otherwise, the class will be guessed using host/ip/ident/etc. * NOTE: If the or tag specifies an ip, and this user resolves, * then their ip will be taken as 'priority' anyway, so for example, * will match joe!bloggs@localhost */ ConnectClass* User::SetClass(const std::string &explicit_name) { ConnectClass *found = NULL; if (!IS_LOCAL(this)) return NULL; ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Setting connect class for UID %s", this->uuid.c_str()); if (!explicit_name.empty()) { for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++) { ConnectClass* c = *i; if (explicit_name == c->name) { ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Explicitly set to %s", explicit_name.c_str()); found = c; } } } else { for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++) { ConnectClass* c = *i; if (c->type == CC_ALLOW) { ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "ALLOW %s %d %s", c->host.c_str(), c->GetPort(), c->GetName().c_str()); } else { ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "DENY %s %d %s", c->GetHost().c_str(), c->GetPort(), c->GetName().c_str()); } /* check if host matches.. */ if (c->GetHost().length() && !InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) && !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL)) { ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "No host match (for %s)", c->GetHost().c_str()); continue; } /* * deny change if change will take class over the limit check it HERE, not after we found a matching class, * because we should attempt to find another class if this one doesn't match us. -- w00t */ if (c->limit && (c->GetReferenceCount() >= c->limit)) { ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit); continue; } /* if it requires a port ... */ if (c->GetPort()) { ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Requires port (%d)", c->GetPort()); /* and our port doesn't match, fail. */ if (this->GetServerPort() != c->GetPort()) { ServerInstance->Logs->Log("CONNECTCLASS", DEBUG, "Port match failed (%d)", this->GetServerPort()); continue; } } /* we stop at the first class that meets ALL critera. */ found = c; break; } } /* * Okay, assuming we found a class that matches.. switch us into that class, keeping refcounts up to date. */ if (found) { MyClass = found; } return this->MyClass; } /* looks up a users password for their connection class (/ tags) * NOTE: If the or tag specifies an ip, and this user resolves, * then their ip will be taken as 'priority' anyway, so for example, * will match joe!bloggs@localhost */ ConnectClass* User::GetClass() { return this->MyClass; } void User::PurgeEmptyChannels() { std::vector to_delete; // firstly decrement the count on each channel for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++) { Channel* c = *f; c->RemoveAllPrefixes(this); c->DelUser(this); } this->UnOper(); } void User::ShowMOTD() { if (!ServerInstance->Config->MOTD.size()) { this->WriteNumeric(ERR_NOMOTD, "%s :Message of the day file is missing.",this->nick.c_str()); return; } this->WriteNumeric(RPL_MOTDSTART, "%s :%s message of the day", this->nick.c_str(), ServerInstance->Config->ServerName.c_str()); for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++) this->WriteNumeric(RPL_MOTD, "%s :- %s",this->nick.c_str(),i->c_str()); this->WriteNumeric(RPL_ENDOFMOTD, "%s :End of message of the day.", this->nick.c_str()); } void User::ShowRULES() { if (!ServerInstance->Config->RULES.size()) { this->WriteNumeric(ERR_NORULES, "%s :RULES File is missing",this->nick.c_str()); return; } this->WriteNumeric(RPL_RULESTART, "%s :- %s Server Rules -",this->nick.c_str(),ServerInstance->Config->ServerName.c_str()); for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++) this->WriteNumeric(RPL_RULES, "%s :- %s",this->nick.c_str(),i->c_str()); this->WriteNumeric(RPL_RULESEND, "%s :End of RULES command.",this->nick.c_str()); } void User::IncreasePenalty(int increase) { this->Penalty += increase; } void User::DecreasePenalty(int decrease) { this->Penalty -= decrease; } void FakeUser::SetFakeServer(std::string name) { this->nick = name; this->server = name; } const std::string FakeUser::GetFullHost() { if (!ServerInstance->Config->HideWhoisServer.empty()) return ServerInstance->Config->HideWhoisServer; return nick; } const std::string FakeUser::GetFullRealHost() { if (!ServerInstance->Config->HideWhoisServer.empty()) return ServerInstance->Config->HideWhoisServer; return nick; } ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask) : config(tag), type(t), name("unnamed"), registration_timeout(0), host(mask), pingtime(0), pass(""), hash(""), softsendqmax(0), hardsendqmax(0), recvqmax(0), penaltythreshold(0), maxlocal(0), maxglobal(0), maxchans(0), port(0), limit(0) { } ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent) : config(tag), type(t), name("unnamed"), registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime), pass(parent.pass), hash(parent.hash), softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax), penaltythreshold(parent.penaltythreshold), maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxchans(parent.maxchans), port(parent.port), limit(parent.limit) { } void ConnectClass::Update(const ConnectClass* src) { name = src->name; registration_timeout = src->registration_timeout; host = src->host; pingtime = src->pingtime; pass = src->pass; hash = src->hash; softsendqmax = src->softsendqmax; hardsendqmax = src->hardsendqmax; recvqmax = src->recvqmax; penaltythreshold = src->penaltythreshold; maxlocal = src->maxlocal; maxglobal = src->maxglobal; limit = src->limit; }