/* +------------------------------------+ * | 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. * * --------------------------------------------------- */ /* $Core: libIRCDusers */ #include "inspircd.h" #include #include "socketengine.h" #include "wildcard.h" #include "xline.h" #include "bancache.h" #include "commands/cmd_whowas.h" static unsigned long already_sent[MAX_DESCRIPTORS] = {0}; /* XXX: Used for speeding up WriteCommon operations */ unsigned long uniq_id = 0; 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; } } oldadding = adding; break; } *c++; } return output; } void User::StartDNSLookup() { try { bool cached; const char* ip = this->GetIPString(); /* Special case for 4in6 (Have i mentioned i HATE 4in6?) */ if (!strncmp(ip, "0::ffff:", 8)) res_reverse = new UserResolver(this->ServerInstance, this, ip + 8, DNS_QUERY_PTR4, cached); else res_reverse = new UserResolver(this->ServerInstance, this, ip, this->GetProtocolFamily() == AF_INET ? DNS_QUERY_PTR4 : DNS_QUERY_PTR6, cached); this->ServerInstance->AddResolver(res_reverse, cached); } catch (CoreException& e) { ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason()); } } bool User::IsNoticeMaskSet(unsigned char sm) { return (snomasks[sm-65]); } void User::SetNoticeMask(unsigned char sm, bool value) { 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) { return (modes[m-65]); } void User::SetMode(unsigned char m, bool value) { modes[m-65] = value; } const char* User::FormatModes() { static char data[MAXBUF]; int offset = 0; for (int n = 0; n < 64; n++) { if (modes[n]) data[offset++] = n+65; } data[offset] = 0; return data; } void User::DecrementModes() { ServerInstance->Log(DEBUG,"DecrementModes()"); for (unsigned char n = 'A'; n <= 'z'; n++) { if (modes[n-65]) { ServerInstance->Log(DEBUG,"DecrementModes() found mode %c", n); ModeHandler* mh = ServerInstance->Modes->FindMode(n, MODETYPE_USER); if (mh) { ServerInstance->Log(DEBUG,"Found handler %c and call ChangeCount", n); mh->ChangeCount(-1); } } } } User::User(InspIRCd* Instance, const std::string &uid) : ServerInstance(Instance) { *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = *uuid = 0; server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName); reset_due = ServerInstance->Time(); age = ServerInstance->Time(true); Penalty = 0; lines_in = lastping = signon = idle_lastmsg = nping = registered = 0; ChannelCount = timeout = bytes_in = bytes_out = cmds_in = cmds_out = 0; OverPenalty = ExemptFromPenalty = muted = exempt = haspassed = dns_done = false; fd = -1; recvq.clear(); sendq.clear(); WriteError.clear(); res_forward = res_reverse = NULL; Visibility = NULL; ip = NULL; MyClass = NULL; chans.clear(); invites.clear(); memset(modes,0,sizeof(modes)); memset(snomasks,0,sizeof(snomasks)); /* Invalidate cache */ operquit = cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL; if (uid.empty()) strlcpy(uuid, Instance->GetUID().c_str(), UUID_LENGTH); else strlcpy(uuid, uid.c_str(), UUID_LENGTH); ServerInstance->Log(DEBUG,"New UUID for user: %s (%s)", uuid, uid.empty() ? "allocated new" : "used remote"); user_hash::iterator finduuid = Instance->uuidlist->find(uuid); if (finduuid == Instance->uuidlist->end()) (*Instance->uuidlist)[uuid] = this; else throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor"); } void User::RemoveCloneCounts() { clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString()); if (x != ServerInstance->local_clones.end()) { x->second--; if (!x->second) { ServerInstance->local_clones.erase(x); } } clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString()); if (y != ServerInstance->global_clones.end()) { y->second--; if (!y->second) { ServerInstance->global_clones.erase(y); } } } User::~User() { /* NULL for remote users :) */ if (this->MyClass) { this->MyClass->RefCount--; ServerInstance->Log(DEBUG, "User destructor -- connect refcount now: %u", this->MyClass->RefCount); } this->InvalidateCache(); this->DecrementModes(); if (operquit) free(operquit); if (ip) { this->RemoveCloneCounts(); if (this->GetProtocolFamily() == AF_INET) { delete (sockaddr_in*)ip; } #ifdef SUPPORT_IP6LINKS else { delete (sockaddr_in6*)ip; } #endif } ServerInstance->uuidlist->erase(uuid); } char* User::MakeHost() { if (this->cached_makehost) return this->cached_makehost; char nhost[MAXBUF]; /* This is much faster than snprintf */ char* t = nhost; for(char* n = ident; *n; n++) *t++ = *n; *t++ = '@'; for(char* n = host; *n; n++) *t++ = *n; *t = 0; this->cached_makehost = strdup(nhost); return this->cached_makehost; } char* User::MakeHostIP() { if (this->cached_hostip) return this->cached_hostip; char ihost[MAXBUF]; /* This is much faster than snprintf */ char* t = ihost; for(char* n = ident; *n; n++) *t++ = *n; *t++ = '@'; for(const char* n = this->GetIPString(); *n; n++) *t++ = *n; *t = 0; this->cached_hostip = strdup(ihost); return this->cached_hostip; } void User::CloseSocket() { ServerInstance->SE->Shutdown(this, 2); ServerInstance->SE->Close(this); } char* User::GetFullHost() { if (this->cached_fullhost) return this->cached_fullhost; char result[MAXBUF]; char* t = result; for(char* n = nick; *n; n++) *t++ = *n; *t++ = '!'; for(char* n = ident; *n; n++) *t++ = *n; *t++ = '@'; for(char* n = dhost; *n; n++) *t++ = *n; *t = 0; this->cached_fullhost = strdup(result); return this->cached_fullhost; } char* User::MakeWildHost() { static char nresult[MAXBUF]; char* t = nresult; *t++ = '*'; *t++ = '!'; *t++ = '*'; *t++ = '@'; for(char* n = dhost; *n; n++) *t++ = *n; *t = 0; return nresult; } int User::ReadData(void* buffer, size_t size) { if (IS_LOCAL(this)) { #ifndef WIN32 return read(this->fd, buffer, size); #else return recv(this->fd, (char*)buffer, size, 0); #endif } else return 0; } char* User::GetFullRealHost() { if (this->cached_fullrealhost) return this->cached_fullrealhost; char fresult[MAXBUF]; char* t = fresult; for(char* n = nick; *n; n++) *t++ = *n; *t++ = '!'; for(char* n = ident; *n; n++) *t++ = *n; *t++ = '@'; for(char* n = host; *n; n++) *t++ = *n; *t = 0; this->cached_fullrealhost = strdup(fresult); return this->cached_fullrealhost; } bool User::IsInvited(const irc::string &channel) { for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++) { if (channel == *i) { return true; } } return false; } InvitedList* User::GetInviteList() { return &invites; } void User::InviteTo(const irc::string &channel) { invites.push_back(channel); } void User::RemoveInvite(const irc::string &channel) { for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++) { if (channel == *i) { invites.erase(i); return; } } } bool User::HasPermission(const std::string &command) { char* mycmd; char* savept; char* savept2; /* * 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; } // check their opertype exists (!). This won't affect local users, of course. opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper); if (iter_opertype == ServerInstance->Config->opertypes.end()) { return false; } /* XXX all this strtok/strdup stuff is a bit ick and horrid -- w00t */ char* Classes = strdup(iter_opertype->second); char* myclass = strtok_r(Classes," ",&savept); while (myclass) { operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass); if (iter_operclass != ServerInstance->Config->operclass.end()) { char* CommandList = strdup(iter_operclass->second); mycmd = strtok_r(CommandList," ",&savept2); while (mycmd) { if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*')) { free(Classes); free(CommandList); return true; } mycmd = strtok_r(NULL," ",&savept2); } free(CommandList); } myclass = strtok_r(NULL," ",&savept); } free(Classes); return false; } /** NOTE: We cannot pass a const reference to this method. * The string is changed by the workings of the method, * so that if we pass const ref, we end up copying it to * something we can change anyway. Makes sense to just let * the compiler do that copy for us. */ bool User::AddBuffer(std::string a) { try { std::string::size_type i = a.rfind('\r'); while (i != std::string::npos) { a.erase(i, 1); i = a.rfind('\r'); } if (a.length()) recvq.append(a); if (this->MyClass && (recvq.length() > this->MyClass->GetRecvqMax())) { this->SetWriteError("RecvQ exceeded"); ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->MyClass->GetRecvqMax()); return false; } return true; } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::AddBuffer()"); return false; } } bool User::BufferIsReady() { return (recvq.find('\n') != std::string::npos); } void User::ClearBuffer() { recvq.clear(); } std::string User::GetBuffer() { try { if (recvq.empty()) return ""; /* Strip any leading \r or \n off the string. * Usually there are only one or two of these, * so its is computationally cheap to do. */ std::string::iterator t = recvq.begin(); while (t != recvq.end() && (*t == '\r' || *t == '\n')) { recvq.erase(t); t = recvq.begin(); } for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++) { /* Find the first complete line, return it as the * result, and leave the recvq as whats left */ if (*x == '\n') { std::string ret = std::string(recvq.begin(), x); recvq.erase(recvq.begin(), x + 1); return ret; } } return ""; } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::GetBuffer()"); return ""; } } void User::AddWriteBuf(const std::string &data) { if (*this->GetWriteError()) return; if (this->MyClass && (sendq.length() + data.length() > this->MyClass->GetSendqMax())) { /* * Fix by brain - Set the error text BEFORE calling writeopers, because * if we dont it'll recursively call here over and over again trying * to repeatedly add the text to the sendq! */ this->SetWriteError("SendQ exceeded"); ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->MyClass->GetSendqMax()); return; } try { if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */ sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */ else sendq.append(data); } catch (...) { this->SetWriteError("SendQ exceeded"); ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick); } } // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it) void User::FlushWriteBuf() { try { if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError())) { sendq.clear(); } if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER)) { int old_sendq_length = sendq.length(); int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0); if (n_sent == -1) { if (errno == EAGAIN) { /* The socket buffer is full. This isnt fatal, * try again later. */ this->ServerInstance->SE->WantWrite(this); } else { /* Fatal error, set write error and bail */ this->SetWriteError(errno ? strerror(errno) : "EOF from client"); return; } } else { /* advance the queue */ if (n_sent) this->sendq = this->sendq.substr(n_sent); /* update the user's stats counters */ this->bytes_out += n_sent; this->cmds_out++; if (n_sent != old_sendq_length) this->ServerInstance->SE->WantWrite(this); } } } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::FlushWriteBuf()"); } if (this->sendq.empty()) { FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this)); } } void User::SetWriteError(const std::string &error) { try { // don't try to set the error twice, its already set take the first string. if (this->WriteError.empty()) this->WriteError = error; } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::SetWriteError()"); } } const char* User::GetWriteError() { return this->WriteError.c_str(); } void User::Oper(const std::string &opertype) { try { this->modes[UM_OPERATOR] = 1; this->WriteServ("MODE %s :+o", this->nick); FOREACH_MOD(I_OnOper, OnOper(this, opertype)); ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str()); strlcpy(this->oper, opertype.c_str(), NICKMAX - 1); ServerInstance->all_opers.push_back(this); FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype)); } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::Oper()"); } } void User::UnOper() { try { if (IS_OPER(this)) { // unset their oper type (what IS_OPER checks), and remove +o *this->oper = 0; this->modes[UM_OPERATOR] = 0; // remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404 ServerInstance->all_opers.remove(this); } } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::UnOper()"); } } void User::QuitUser(InspIRCd* Instance, User *user, const std::string &quitreason, const char* operreason) { Instance->Log(DEBUG,"QuitUser: %s '%s'", user->nick, quitreason.c_str()); user->Write("ERROR :Closing link (%s@%s) [%s]", user->ident, user->host, *operreason ? operreason : quitreason.c_str()); user->muted = true; Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason); } /* adds or updates an entry in the whowas list */ void User::AddToWhoWas() { Command* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS"); if (whowas_command) { std::deque params; params.push_back(this); whowas_command->HandleInternal(WHOWAS_ADD, params); } } /* add a client connection to the sockets list */ void User::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip) { /* NOTE: Calling this one parameter constructor for User automatically * allocates a new UUID and places it in the hash_map. */ User* New = NULL; try { New = new User(Instance); } catch (...) { Instance->Log(DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed."); Instance->WriteOpers("*** WARNING *** Duplicate UUID allocated!"); return; } Instance->Log(DEBUG,"New user fd: %d", socket); int j = 0; Instance->unregistered_count++; char ipaddr[MAXBUF]; #ifdef IPV6 if (socketfamily == AF_INET6) inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr)); else #endif inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr)); (*(Instance->clientlist))[New->uuid] = New; New->SetFd(socket); /* The users default nick is their UUID */ strlcpy(New->nick, New->uuid, NICKMAX - 1); New->server = Instance->FindServerNamePtr(Instance->Config->ServerName); /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */ strcpy(New->ident, "unknown"); New->registered = REG_NONE; New->signon = Instance->Time() + Instance->Config->dns_timeout; New->lastping = 1; New->SetSockAddr(socketfamily, ipaddr, port); /* Smarter than your average bear^H^H^H^Hset of strlcpys. */ for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++) New->dhost[j] = New->host[j] = *temp; New->dhost[j] = New->host[j] = 0; Instance->AddLocalClone(New); Instance->AddGlobalClone(New); /* * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved. * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t */ ConnectClass* i = New->SetClass(); if (!i) { User::QuitUser(Instance, New, "Access denied by configuration"); return; } /* * Check connect class settings and initialise settings into User. * This will be done again after DNS resolution. -- w00t */ New->CheckClass(); Instance->local_users.push_back(New); if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS)) { Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit); User::QuitUser(Instance, New,"No more connections allowed"); return; } /* * XXX - * this is done as a safety check to keep the file descriptors within range of fd_ref_table. * its a pretty big but for the moment valid assumption: * file descriptors are handed out starting at 0, and are recycled as theyre freed. * therefore if there is ever an fd over 65535, 65536 clients must be connected to the * irc server at once (or the irc server otherwise initiating this many connections, files etc) * which for the time being is a physical impossibility (even the largest networks dont have more * than about 10,000 users on ONE server!) */ #ifndef WINDOWS if ((unsigned int)socket >= MAX_DESCRIPTORS) { User::QuitUser(Instance, New, "Server is full"); return; } #endif /* * even with bancache, we still have to keep User::exempt current. * besides that, if we get a positive bancache hit, we still won't fuck * them over if they are exempt. -- w00t */ New->exempt = (Instance->XLines->MatchesLine("E",New) != NULL); if (BanCacheHit *b = Instance->BanCache->GetHit(New->GetIPString())) { if (!b->Type.empty() && !New->exempt) { /* user banned */ Instance->Log(DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString()); if (*Instance->Config->MoronBanner) New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner); User::QuitUser(Instance, New, b->Reason); return; } else { Instance->Log(DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString()); } } else { if (!New->exempt) { XLine* r = Instance->XLines->MatchesLine("Z",New); if (r) { Instance->Log(DEBUG, std::string("BanCache: Adding positive hit for ") + New->GetIPString()); Instance->BanCache->AddHit(New->GetIPString(), "Z", std::string("Z-Lined: ") + r->reason); r->Apply(New); return; } } } if (socket > -1) { if (!Instance->SE->AddFd(New)) { Instance->Log(DEBUG,"Internal error on new connection"); User::QuitUser(Instance, New, "Internal error handling connection"); } } /* NOTE: even if dns lookups are *off*, we still need to display this. * BOPM and other stuff requires it. */ New->WriteServ("NOTICE Auth :*** Looking up your hostname..."); if (Instance->Config->NoUserDns) { New->dns_done = true; } else { New->StartDNSLookup(); } } unsigned long User::GlobalCloneCount() { clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString()); if (x != ServerInstance->global_clones.end()) return x->second; else return 0; } unsigned long User::LocalCloneCount() { clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString()); if (x != ServerInstance->local_clones.end()) return x->second; else return 0; } /* * Check class restrictions */ void User::CheckClass() { ConnectClass* a = this->MyClass; if ((!a) || (a->GetType() == CC_DENY)) { User::QuitUser(ServerInstance, this, "Unauthorised connection"); return; } else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal())) { User::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)"); ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString()); return; } else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal())) { User::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)"); ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString()); return; } this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout; this->timeout = ServerInstance->Time() + a->GetRegTimeout(); this->MaxChans = a->GetMaxChans(); } 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 (this->MyClass && !this->MyClass->GetPass().empty() && !this->haspassed) { User::QuitUser(ServerInstance, this, "Invalid password"); return; } if (!this->exempt) { XLine* r = ServerInstance->XLines->MatchesLine("G",this); if (r) { this->muted = true; r->Apply(this); return; } XLine* n = ServerInstance->XLines->MatchesLine("K",this); if (n) { this->muted = true; n->Apply(this); return; } } this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network); this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host); this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION); this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__); this->WriteServ("004 %s %s %s %s %s %s", this->nick, ServerInstance->Config->ServerName, VERSION, ServerInstance->Modes->UserModeList().c_str(), ServerInstance->Modes->ChannelModeList().c_str(), ServerInstance->Modes->ParaModeList().c_str()); ServerInstance->Config->Send005(this); this->WriteServ("042 %s %s :your unique ID", this->nick, this->uuid); this->ShowMOTD(); /* Now registered */ if (ServerInstance->unregistered_count) ServerInstance->unregistered_count--; /* Trigger LUSERS output, give modules a chance too */ int MOD_RESULT = 0; FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS")); if (!MOD_RESULT) ServerInstance->CallCommandHandler("LUSERS", NULL, 0, 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->GetPort(), this->nick, this->ident, this->host, this->GetIPString(), this->fullname); } /** 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) { try { //user_hash::iterator newnick; user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick); if (!strcasecmp(this->nick,New)) return oldnick->second; if (oldnick == ServerInstance->clientlist->end()) return NULL; /* doesnt exist */ User* olduser = oldnick->second; (*(ServerInstance->clientlist))[New] = olduser; ServerInstance->clientlist->erase(oldnick); return olduser; } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::UpdateNickHash()"); return NULL; } } void User::InvalidateCache() { /* Invalidate cache */ if (cached_fullhost) free(cached_fullhost); if (cached_hostip) free(cached_hostip); if (cached_makehost) free(cached_makehost); if (cached_fullrealhost) free(cached_fullrealhost); cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL; } bool User::ForceNickChange(const char* newnick) { try { int MOD_RESULT = 0; this->InvalidateCache(); FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick)); if (MOD_RESULT) { ServerInstance->stats->statsCollisions++; return false; } if (ServerInstance->XLines->MatchesLine("Q",newnick)) { ServerInstance->stats->statsCollisions++; return false; } if (this->registered == REG_ALL) { std::deque dummy; Command* nickhandler = ServerInstance->Parser->GetHandler("NICK"); if (nickhandler) { nickhandler->HandleInternal(1, dummy); bool result = (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS); nickhandler->HandleInternal(0, dummy); return result; } } return false; } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::ForceNickChange()"); return false; } } void User::SetSockAddr(int protocol_family, const char* ip, int port) { switch (protocol_family) { #ifdef SUPPORT_IP6LINKS case AF_INET6: { sockaddr_in6* sin = new sockaddr_in6; sin->sin6_family = AF_INET6; sin->sin6_port = port; inet_pton(AF_INET6, ip, &sin->sin6_addr); this->ip = (sockaddr*)sin; } break; #endif case AF_INET: { sockaddr_in* sin = new sockaddr_in; sin->sin_family = AF_INET; sin->sin_port = port; inet_pton(AF_INET, ip, &sin->sin_addr); this->ip = (sockaddr*)sin; } break; default: ServerInstance->Log(DEBUG,"Uh oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick); break; } } int User::GetPort() { if (this->ip == NULL) return 0; switch (this->GetProtocolFamily()) { #ifdef SUPPORT_IP6LINKS case AF_INET6: { sockaddr_in6* sin = (sockaddr_in6*)this->ip; return sin->sin6_port; } break; #endif case AF_INET: { sockaddr_in* sin = (sockaddr_in*)this->ip; return sin->sin_port; } break; default: break; } return 0; } int User::GetProtocolFamily() { if (this->ip == NULL) return 0; sockaddr_in* sin = (sockaddr_in*)this->ip; return sin->sin_family; } /* * XXX the duplication here is horrid.. * do we really need two methods doing essentially the same thing? */ const char* User::GetIPString() { static char buf[1024]; if (this->ip == NULL) return ""; switch (this->GetProtocolFamily()) { #ifdef SUPPORT_IP6LINKS case AF_INET6: { static char temp[1024]; sockaddr_in6* sin = (sockaddr_in6*)this->ip; inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf)); /* IP addresses starting with a : on irc are a Bad Thing (tm) */ if (*buf == ':') { strlcpy(&temp[1], buf, sizeof(temp) - 1); *temp = '0'; return temp; } return buf; } break; #endif case AF_INET: { sockaddr_in* sin = (sockaddr_in*)this->ip; inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf)); return buf; } break; default: break; } return ""; } /** NOTE: We cannot pass a const reference to this method. * The string is changed by the workings of the method, * so that if we pass const ref, we end up copying it to * something we can change anyway. Makes sense to just let * the compiler do that copy for us. */ void User::Write(std::string text) { if (!ServerInstance->SE->BoundsCheckFd(this)) return; try { /* ServerInstance->Log(DEBUG,"C[%d] O %s", this->GetFd(), text.c_str()); * WARNING: The above debug line is VERY loud, do NOT * enable it till we have a good way of filtering it * out of the logs (e.g. 1.2 would be good). */ text.append("\r\n"); } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::Write() std::string::append"); return; } if (ServerInstance->Config->GetIOHook(this->GetPort())) { try { /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to * implement their own buffering mechanisms */ ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length()); } catch (CoreException& modexcept) { ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason()); } } else { this->AddWriteBuf(text); } ServerInstance->stats->statsSent += text.length(); this->ServerInstance->SE->WantWrite(this); } /** 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) { char textbuffer[MAXBUF]; snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str()); this->Write(std::string(textbuffer)); } /** 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::WriteFrom(User *user, const std::string &text) { char tb[MAXBUF]; snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),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) return; va_start(argsPtr, text); vsnprintf(textbuffer, MAXBUF, text, argsPtr); va_end(argsPtr); this->WriteCommon(std::string(textbuffer)); } void User::WriteCommon(const std::string &text) { try { bool sent_to_at_least_one = false; char tb[MAXBUF]; if (this->registered != REG_ALL) return; uniq_id++; /* We dont want to be doing this n times, just once */ snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str()); std::string out = tb; for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++) { CUList* ulist = v->first->GetUsers(); for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++) { if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id)) { already_sent[i->first->fd] = uniq_id; i->first->Write(out); sent_to_at_least_one = true; } } } /* * if the user was not in any channels, no users will receive the text. Make sure the user * receives their OWN message for WriteCommon */ if (!sent_to_at_least_one) { this->Write(std::string(tb)); } } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::WriteCommon()"); } } /* write a formatted string to all users who share at least one common * channel, NOT including the source user e.g. for use in QUIT */ void User::WriteCommonExcept(const char* text, ...) { char textbuffer[MAXBUF]; va_list argsPtr; va_start(argsPtr, text); vsnprintf(textbuffer, MAXBUF, text, argsPtr); va_end(argsPtr); this->WriteCommonExcept(std::string(textbuffer)); } 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++; snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str()); snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str()); std::string out1 = tb1; std::string out2 = tb2; for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++) { CUList *ulist = v->first->GetUsers(); for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++) { if (this != i->first) { if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id)) { already_sent[i->first->fd] = uniq_id; i->first->Write(IS_OPER(i->first) ? out2 : out1); } } } } } void User::WriteCommonExcept(const std::string &text) { char tb1[MAXBUF]; std::string out1; if (this->registered != REG_ALL) return; uniq_id++; snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str()); out1 = tb1; for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++) { CUList *ulist = v->first->GetUsers(); for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++) { if (this != i->first) { if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id)) { already_sent[i->first->fd] = uniq_id; i->first->Write(out1); } } } } } void User::WriteWallOps(const std::string &text) { if (!IS_OPER(this) && IS_LOCAL(this)) return; std::string wallop("WALLOPS :"); wallop.append(text); for (std::vector::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++) { User* t = *i; if (t->IsModeSet('w')) this->WriteTo(t,wallop); } } void User::WriteWallOps(const char* text, ...) { 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->first->HasUser(other)) return true; } return false; } bool User::ChangeName(const char* gecos) { if (!strcmp(gecos, this->fullname)) return true; if (IS_LOCAL(this)) { int MOD_RESULT = 0; FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos)); if (MOD_RESULT) return false; FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos)); } strlcpy(this->fullname,gecos,MAXGECOS+1); return true; } bool User::ChangeDisplayedHost(const char* host) { if (!strcmp(host, this->dhost)) return true; if (IS_LOCAL(this)) { int MOD_RESULT = 0; FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host)); if (MOD_RESULT) return false; FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host)); } if (this->ServerInstance->Config->CycleHosts) this->WriteCommonExcept("QUIT :Changing hosts"); /* Fix by Om: User::dhost is 65 long, this was truncating some long hosts */ strlcpy(this->dhost,host,64); this->InvalidateCache(); if (this->ServerInstance->Config->CycleHosts) { for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++) { i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name); std::string n = this->ServerInstance->Modes->ModeString(this, i->first); if (n.length() > 0) i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str()); } } if (IS_LOCAL(this)) this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost); return true; } bool User::ChangeIdent(const char* newident) { if (!strcmp(newident, this->ident)) return true; if (this->ServerInstance->Config->CycleHosts) this->WriteCommonExcept("%s","QUIT :Changing ident"); strlcpy(this->ident, newident, IDENTMAX+2); this->InvalidateCache(); if (this->ServerInstance->Config->CycleHosts) { for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++) { i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name); std::string n = this->ServerInstance->Modes->ModeString(this, i->first); if (n.length() > 0) i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str()); } } return true; } void User::SendAll(const char* command, 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(), command, textbuffer); std::string fmt = formatbuffer; for (std::vector::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++) { (*i)->Write(fmt); } } std::string User::ChannelList(User* source) { try { std::string list; for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++) { /* If the target is the same as the sender, let them see all their channels. * If the channel is NOT private/secret OR the user shares a common channel * If the user is an oper, and the option is set. */ if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source)))) { list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" "); } } return list; } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::ChannelList()"); return ""; } } void User::SplitChanList(User* dest, const std::string &cl) { std::string line; std::ostringstream prefix; std::string::size_type start, pos, length; try { prefix << this->nick << " " << dest->nick << " :"; line = prefix.str(); int namelen = strlen(ServerInstance->Config->ServerName) + 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()); } } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::SplitChanList()"); } } unsigned int User::GetMaxChans() { return this->MaxChans; } /* * 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; 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->GetName() && !c->GetDisabled()) { found = c; } } } else { for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++) { ConnectClass* c = *i; if (((match(this->GetIPString(),c->GetHost().c_str(),true)) || (match(this->host,c->GetHost().c_str())))) { if (c->GetPort()) { if (this->GetPort() == c->GetPort() && !c->GetDisabled()) { found = c; } else continue; } else { if (!c->GetDisabled()) found = c; } } } } /* ensure we don't fuck things up refcount wise, only remove them from a class if we find a new one :P */ if (found) { /* deny change if change will take class over the limit */ if (found->limit && (found->RefCount + 1 >= found->limit)) { ServerInstance->Log(DEBUG, "OOPS: Connect class limit (%u) hit, denying", found->limit); return this->MyClass; } /* should always be valid, but just in case .. */ if (this->MyClass) { if (found == this->MyClass) // no point changing this shit :P return this->MyClass; this->MyClass->RefCount--; ServerInstance->Log(DEBUG, "Untying user from connect class -- refcount: %u", this->MyClass->RefCount); } this->MyClass = found; this->MyClass->RefCount++; ServerInstance->Log(DEBUG, "User tied to new class -- connect refcount now: %u", this->MyClass->RefCount); } 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++) { f->first->RemoveAllPrefixes(this); if (f->first->DelUser(this) == 0) { /* No users left in here, mark it for deletion */ try { to_delete.push_back(f->first); } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::PurgeEmptyChannels to_delete.push_back()"); } } } for (std::vector::iterator n = to_delete.begin(); n != to_delete.end(); n++) { Channel* thischan = *n; chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name); if (i2 != ServerInstance->chanlist->end()) { FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second)); DELETE(i2->second); ServerInstance->chanlist->erase(i2); this->chans.erase(*n); } } this->UnOper(); } void User::ShowMOTD() { if (!ServerInstance->Config->MOTD.size()) { this->WriteServ("422 %s :Message of the day file is missing.",this->nick); return; } this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName); for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++) this->WriteServ("372 %s :- %s",this->nick,i->c_str()); this->WriteServ("376 %s :End of message of the day.", this->nick); } void User::ShowRULES() { if (!ServerInstance->Config->RULES.size()) { this->WriteServ("434 %s :RULES File is missing",this->nick); return; } this->WriteServ("308 %s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName); for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++) this->WriteServ("232 %s :- %s",this->nick,i->c_str()); this->WriteServ("309 %s :End of RULES command.",this->nick); } void User::HandleEvent(EventType et, int errornum) { /* WARNING: May delete this user! */ int thisfd = this->GetFd(); try { switch (et) { case EVENT_READ: ServerInstance->ProcessUser(this); break; case EVENT_WRITE: this->FlushWriteBuf(); break; case EVENT_ERROR: /** This should be safe, but dont DARE do anything after it -- Brain */ this->SetWriteError(errornum ? strerror(errornum) : "EOF from client"); break; } } catch (...) { ServerInstance->Log(DEBUG,"Exception in User::HandleEvent intercepted"); } /* If the user has raised an error whilst being processed, quit them now we're safe to */ if ((ServerInstance->SE->GetRef(thisfd) == this)) { if (!WriteError.empty()) { User::QuitUser(ServerInstance, this, GetWriteError()); } } } void User::SetOperQuit(const std::string &oquit) { if (operquit) return; operquit = strdup(oquit.c_str()); } const char* User::GetOperQuit() { return operquit ? operquit : ""; } void User::IncreasePenalty(int increase) { this->Penalty += increase; } void User::DecreasePenalty(int decrease) { this->Penalty -= decrease; } VisData::VisData() { } VisData::~VisData() { } bool VisData::VisibleTo(User* user) { return true; }