/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev. * E-mail: * * * * Written by Craig Edwards, Craig McLure, and others. * This program is free but copyrighted software; see * the file COPYING for details. * * --------------------------------------------------- */ using namespace std; #include "inspircd_config.h" #include "channels.h" #include "connection.h" #include "users.h" #include "inspircd.h" #include #ifdef THREADED_DNS #include #include #endif #include "inspstring.h" #include "commands.h" #include "helperfuncs.h" #include "typedefs.h" #include "socketengine.h" #include "hashcomp.h" #include "message.h" #include "wildcard.h" #include "xline.h" #include "cull_list.h" extern InspIRCd* ServerInstance; extern int WHOWAS_STALE; extern int WHOWAS_MAX; extern std::vector modules; extern std::vector factory; extern std::vector module_sockets; extern int MODCOUNT; extern InspSocket* socket_ref[MAX_DESCRIPTORS]; extern time_t TIME; extern userrec* fd_ref_table[MAX_DESCRIPTORS]; extern ServerConfig *Config; extern user_hash clientlist; extern whowas_hash whowas; extern std::vector local_users; std::vector all_opers; template inline string ConvToStr(const T &in) { stringstream tmp; if (!(tmp << in)) return string(); return tmp.str(); } userrec::userrec() { // the PROPER way to do it, AVOID bzero at *ALL* costs *nick = *ident = *host = *dhost = *fullname = *modes = *awaymsg = *oper = 0; server = (char*)FindServerNamePtr(Config->ServerName); reset_due = TIME; lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0; timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0; haspassed = dns_done = false; recvq = ""; sendq = ""; chans.clear(); invites.clear(); } userrec::~userrec() { } void userrec::MakeHost(char* nhost) { /* 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; } void userrec::CloseSocket() { shutdown(this->fd,2); close(this->fd); } char* userrec::GetFullHost() { static 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; return result; } char* userrec::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 userrec::ReadData(void* buffer, size_t size) { if (this->fd > -1) { return read(this->fd, buffer, size); } else return 0; } char* userrec::GetFullRealHost() { static 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; return fresult; } bool userrec::IsInvited(irc::string &channel) { for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++) { irc::string compare = i->channel; if (compare == channel) { return true; } } return false; } InvitedList* userrec::GetInviteList() { return &invites; } void userrec::InviteTo(irc::string &channel) { Invited i; i.channel = channel; invites.push_back(i); } void userrec::RemoveInvite(irc::string &channel) { log(DEBUG,"Removing invites"); if (invites.size()) { for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++) { irc::string compare = i->channel; if (compare == channel) { invites.erase(i); return; } } } } bool userrec::HasPermission(std::string &command) { char TypeName[MAXBUF],Classes[MAXBUF],ClassName[MAXBUF],CommandList[MAXBUF]; char* mycmd; char* savept; char* savept2; // users on u-lined servers can completely bypass // all permissions based checks. // // of course, if this is sent to a remote server and this // server is not ulined there, then that other server // silently drops the command. if (is_uline(this->server)) return true; // are they even an oper at all? if (strchr(this->modes,'o')) { for (int j =0; j < Config->ConfValueEnum("type",&Config->config_f); j++) { Config->ConfValue("type","name",j,TypeName,&Config->config_f); if (!strcmp(TypeName,this->oper)) { Config->ConfValue("type","classes",j,Classes,&Config->config_f); char* myclass = strtok_r(Classes," ",&savept); while (myclass) { for (int k =0; k < Config->ConfValueEnum("class",&Config->config_f); k++) { Config->ConfValue("class","name",k,ClassName,&Config->config_f); if (!strcmp(ClassName,myclass)) { Config->ConfValue("class","commands",k,CommandList,&Config->config_f); mycmd = strtok_r(CommandList," ",&savept2); while (mycmd) { if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*')) { return true; } mycmd = strtok_r(NULL," ",&savept2); } } } myclass = strtok_r(NULL," ",&savept); } } } } return false; } bool userrec::AddBuffer(std::string a) { std::string b = ""; for (unsigned int i = 0; i < a.length(); i++) if ((a[i] != '\r') && (a[i] != '\0') && (a[i] != 7)) b = b + a[i]; std::stringstream stream(recvq); stream << b; recvq = stream.str(); unsigned int i = 0; // count the size of the first line in the buffer. while (i < recvq.length()) { if (recvq[i++] == '\n') break; } if (recvq.length() > (unsigned)this->recvqmax) { this->SetWriteError("RecvQ exceeded"); WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax); } // return false if we've had more than 600 characters WITHOUT // a carriage return (this is BAD, drop the socket) return (i < 600); } bool userrec::BufferIsReady() { for (unsigned int i = 0; i < recvq.length(); i++) if (recvq[i] == '\n') return true; return false; } void userrec::ClearBuffer() { recvq = ""; } std::string userrec::GetBuffer() { if (recvq == "") return ""; char* line = (char*)recvq.c_str(); std::string ret = ""; while ((*line != '\n') && (strlen(line))) { ret = ret + *line; line++; } if ((*line == '\n') || (*line == '\r')) line++; recvq = line; return ret; } void userrec::AddWriteBuf(std::string data) { if (this->GetWriteError() != "") return; if (sendq.length() + data.length() > (unsigned)this->sendqmax) { /* 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"); WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax); return; } std::stringstream stream; stream << sendq << data; sendq = stream.str(); } // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it) void userrec::FlushWriteBuf() { if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER)) { char* tb = (char*)this->sendq.c_str(); int n_sent = write(this->fd,tb,this->sendq.length()); if (n_sent == -1) { this->SetWriteError(strerror(errno)); } else { // advance the queue tb += n_sent; this->sendq = tb; // update the user's stats counters this->bytes_out += n_sent; this->cmds_out++; } } } void userrec::SetWriteError(std::string error) { log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str()); // don't try to set the error twice, its already set take the first string. if (this->WriteError == "") this->WriteError = error; } std::string userrec::GetWriteError() { return this->WriteError; } void AddOper(userrec* user) { log(DEBUG,"Oper added to optimization list"); all_opers.push_back(user); } void DeleteOper(userrec* user) { for (std::vector::iterator a = all_opers.begin(); a < all_opers.end(); a++) { if (*a == user) { log(DEBUG,"Oper removed from optimization list"); all_opers.erase(a); return; } } } void kill_link(userrec *user,const char* r) { user_hash::iterator iter = clientlist.find(user->nick); char reason[MAXBUF]; strlcpy(reason,r,MAXBUF); if (strlen(reason)>MAXQUIT) { reason[MAXQUIT-1] = '\0'; } log(DEBUG,"kill_link: %s '%s'",user->nick,reason); Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason); log(DEBUG,"closing fd %lu",(unsigned long)user->fd); if (user->registered == 7) { FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason)); WriteCommonExcept(user,"QUIT :%s",reason); } user->FlushWriteBuf(); FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user)); if (user->fd > -1) { if (Config->GetIOHook(user->port)) { Config->GetIOHook(user->port)->OnRawSocketClose(user->fd); } ServerInstance->SE->DelFd(user->fd); user->CloseSocket(); } // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything // if they were an oper with +s. if (user->registered == 7) { purge_empty_chans(user); // fix by brain: only show local quits because we only show local connects (it just makes SENSE) if (user->fd > -1) WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason); AddWhoWas(user); } if (iter != clientlist.end()) { log(DEBUG,"deleting user hash value %lu",(unsigned long)user); if (user->fd > -1) { fd_ref_table[user->fd] = NULL; if (find(local_users.begin(),local_users.end(),user) != local_users.end()) { local_users.erase(find(local_users.begin(),local_users.end(),user)); log(DEBUG,"Delete local user"); } } clientlist.erase(iter); } delete user; } void kill_link_silent(userrec *user,const char* r) { user_hash::iterator iter = clientlist.find(user->nick); char reason[MAXBUF]; strlcpy(reason,r,MAXBUF); if (strlen(reason)>MAXQUIT) { reason[MAXQUIT-1] = '\0'; } log(DEBUG,"kill_link: %s '%s'",user->nick,reason); Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason); log(DEBUG,"closing fd %lu",(unsigned long)user->fd); user->FlushWriteBuf(); if (user->registered == 7) { FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason)); WriteCommonExcept(user,"QUIT :%s",reason); } FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user)); if (user->fd > -1) { if (Config->GetIOHook(user->port)) { Config->GetIOHook(user->port)->OnRawSocketClose(user->fd); } ServerInstance->SE->DelFd(user->fd); user->CloseSocket(); } if (user->registered == 7) { purge_empty_chans(user); } if (iter != clientlist.end()) { log(DEBUG,"deleting user hash value %lu",(unsigned long)user); if (user->fd > -1) { fd_ref_table[user->fd] = NULL; if (find(local_users.begin(),local_users.end(),user) != local_users.end()) { log(DEBUG,"Delete local user"); local_users.erase(find(local_users.begin(),local_users.end(),user)); } } clientlist.erase(iter); } delete user; } /* adds or updates an entry in the whowas list */ void AddWhoWas(userrec* u) { whowas_hash::iterator iter = whowas.find(u->nick); WhoWasUser *a = new WhoWasUser(); strlcpy(a->nick,u->nick,NICKMAX); strlcpy(a->ident,u->ident,IDENTMAX); strlcpy(a->dhost,u->dhost,160); strlcpy(a->host,u->host,160); strlcpy(a->fullname,u->fullname,MAXGECOS); if (u->server) strlcpy(a->server,u->server,256); a->signon = u->signon; /* MAX_WHOWAS: max number of /WHOWAS items * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and * can be replaced by a newer one */ if (iter == whowas.end()) { if (whowas.size() >= (unsigned)WHOWAS_MAX) { for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++) { // 3600 seconds in an hour ;) if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600))) { // delete the old one if (i->second) delete i->second; // replace with new one i->second = a; log(DEBUG,"added WHOWAS entry, purged an old record"); return; } } // no space left and user doesnt exist. Don't leave ram in use! log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram"); delete a; } else { log(DEBUG,"added fresh WHOWAS entry"); whowas[a->nick] = a; } } else { log(DEBUG,"updated WHOWAS entry"); if (iter->second) delete iter->second; iter->second = a; } } /* add a client connection to the sockets list */ void AddClient(int socket, int port, bool iscached, in_addr ip4) { string tempnick; char tn2[MAXBUF]; user_hash::iterator iter; tempnick = ConvToStr(socket) + "-unknown"; sprintf(tn2,"%d-unknown",socket); iter = clientlist.find(tempnick); // fix by brain. // as these nicknames are 'RFC impossible', we can be sure nobody is going to be // using one as a registered connection. As theyre per fd, we can also safely assume // that we wont have collisions. Therefore, if the nick exists in the list, its only // used by a dead socket, erase the iterator so that the new client may reclaim it. // this was probably the cause of 'server ignores me when i hammer it with reconnects' // issue in earlier alphas/betas if (iter != clientlist.end()) { userrec* goner = iter->second; delete goner; clientlist.erase(iter); } /* * It is OK to access the value here this way since we know * it exists, we just created it above. * * At NO other time should you access a value in a map or a * hash_map this way. */ clientlist[tempnick] = new userrec(); char *ipaddr = (char*)inet_ntoa(ip4); log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr); clientlist[tempnick]->fd = socket; strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX); /* We don't know the host yet, dns lookup could still be going on, * so instead we just put the ip address here, for now. */ strlcpy(clientlist[tempnick]->host, ipaddr, 160); strlcpy(clientlist[tempnick]->dhost, ipaddr, 160); clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName); strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX); clientlist[tempnick]->registered = 0; clientlist[tempnick]->signon = TIME + Config->dns_timeout; clientlist[tempnick]->lastping = 1; clientlist[tempnick]->ip4 = ip4; clientlist[tempnick]->port = port; // set the registration timeout for this user unsigned long class_regtimeout = 90; int class_flood = 0; long class_threshold = 5; long class_sqmax = 262144; // 256kb long class_rqmax = 4096; // 4k for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++) { if (match(ipaddr,i->host.c_str()) && (i->type == CC_ALLOW)) { class_regtimeout = (unsigned long)i->registration_timeout; class_flood = i->flood; clientlist[tempnick]->pingmax = i->pingtime; class_threshold = i->threshold; class_sqmax = i->sendqmax; class_rqmax = i->recvqmax; break; } } clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout; clientlist[tempnick]->timeout = TIME+class_regtimeout; clientlist[tempnick]->flood = class_flood; clientlist[tempnick]->threshold = class_threshold; clientlist[tempnick]->sendqmax = class_sqmax; clientlist[tempnick]->recvqmax = class_rqmax; ucrec a; a.channel = NULL; a.uc_modes = 0; for (int i = 0; i < MAXCHANS; i++) clientlist[tempnick]->chans.push_back(a); if (local_users.size() > Config->SoftLimit) { kill_link(clientlist[tempnick],"No more connections allowed"); return; } if (local_users.size() >= MAXCLIENTS) { kill_link(clientlist[tempnick],"No more connections allowed"); return; } // 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!) if ((unsigned)socket > MAX_DESCRIPTORS) { kill_link(clientlist[tempnick],"Server is full"); return; } char* e = matches_exception(ipaddr); if (!e) { char* r = matches_zline(ipaddr); if (r) { char reason[MAXBUF]; snprintf(reason,MAXBUF,"Z-Lined: %s",r); kill_link(clientlist[tempnick],reason); return; } } fd_ref_table[socket] = clientlist[tempnick]; local_users.push_back(clientlist[tempnick]); ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT); WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname..."); } long FindMatchingGlobal(userrec* user) { long x = 0; for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++) { if (a->second->ip4.s_addr == user->ip4.s_addr) x++; } return x; } long FindMatchingLocal(userrec* user) { long x = 0; for (std::vector::const_iterator a = local_users.begin(); a != local_users.end(); a++) { userrec* comp = (userrec*)(*a); if (comp->ip4.s_addr == user->ip4.s_addr) x++; } return x; } void FullConnectUser(userrec* user, CullList* Goners) { ServerInstance->stats->statsConnects++; user->idle_lastmsg = TIME; log(DEBUG,"ConnectUser: %s",user->nick); ConnectClass a = GetClass(user); if (a.type == CC_DENY) { Goners->AddItem(user,"Unauthorised connection"); return; } if ((*(a.pass.c_str())) && (!user->haspassed)) { Goners->AddItem(user,"Invalid password"); return; } if (FindMatchingLocal(user) > a.maxlocal) { Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)"); WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,(char*)inet_ntoa(user->ip4)); return; } else if (FindMatchingGlobal(user) > a.maxglobal) { Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)"); WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,(char*)inet_ntoa(user->ip4)); return; } char match_against[MAXBUF]; snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host); char* e = matches_exception(match_against); if (!e) { char* r = matches_gline(match_against); if (r) { char reason[MAXBUF]; snprintf(reason,MAXBUF,"G-Lined: %s",r); Goners->AddItem(user,reason); return; } r = matches_kline(user->host); if (r) { char reason[MAXBUF]; snprintf(reason,MAXBUF,"K-Lined: %s",r); Goners->AddItem(user,reason); return; } } WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network); WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host); WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION); WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__); WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION); // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line... // so i'd better split it :) std::stringstream out(Config->data005); std::string token = ""; std::string line5 = ""; int token_counter = 0; while (!out.eof()) { out >> token; line5 = line5 + token + " "; token_counter++; if ((token_counter >= 13) || (out.eof() == true)) { WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str()); line5 = ""; token_counter = 0; } } ShowMOTD(user); // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out // onto the network and produce 'fake direction' FOREACH_MOD(I_OnUserConnect,OnUserConnect(user)); FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user)); user->registered = 7; WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,(char*)inet_ntoa(user->ip4)); } /* re-allocates a nick in the user_hash after they change nicknames, * returns a pointer to the new user as it may have moved */ userrec* ReHashNick(char* Old, char* New) { //user_hash::iterator newnick; user_hash::iterator oldnick = clientlist.find(Old); log(DEBUG,"ReHashNick: %s %s",Old,New); if (!strcasecmp(Old,New)) { log(DEBUG,"old nick is new nick, skipping"); return oldnick->second; } if (oldnick == clientlist.end()) return NULL; /* doesnt exist */ log(DEBUG,"ReHashNick: Found hashed nick %s",Old); userrec* olduser = oldnick->second; clientlist[New] = olduser; clientlist.erase(oldnick); log(DEBUG,"ReHashNick: Nick rehashed as %s",New); return clientlist[New]; } void force_nickchange(userrec* user,const char* newnick) { char nick[MAXBUF]; int MOD_RESULT = 0; *nick = 0; FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick)); if (MOD_RESULT) { ServerInstance->stats->statsCollisions++; kill_link(user,"Nickname collision"); return; } if (matches_qline(newnick)) { ServerInstance->stats->statsCollisions++; kill_link(user,"Nickname collision"); return; } if (user) { if (newnick) { strlcpy(nick,newnick,MAXBUF); } if (user->registered == 7) { char* pars[1]; pars[0] = nick; std::string cmd = "NICK"; ServerInstance->Parser->CallHandler(cmd,pars,1,user); } } }