1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
7 * <brain@chatspike.net>
8 * <Craig@chatspike.net>
10 * Written by Craig Edwards, Craig McLure, and others.
11 * This program is free but copyrighted software; see
12 * the file COPYING for details.
14 * ---------------------------------------------------
19 #include "inspircd_config.h"
21 #include "connection.h"
29 #include "inspstring.h"
31 #include "helperfuncs.h"
33 #include "socketengine.h"
38 #include "cull_list.h"
40 extern InspIRCd* ServerInstance;
41 extern int WHOWAS_STALE;
42 extern int WHOWAS_MAX;
43 extern std::vector<Module*> modules;
44 extern std::vector<ircd_module*> factory;
45 extern std::vector<InspSocket*> module_sockets;
47 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
49 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
50 extern ServerConfig *Config;
51 extern user_hash clientlist;
52 extern whowas_hash whowas;
53 extern std::vector<userrec*> local_users;
55 std::vector<userrec*> all_opers;
57 template<typename T> inline string ConvToStr(const T &in)
60 if (!(tmp << in)) return string();
66 // the PROPER way to do it, AVOID bzero at *ALL* costs
67 *password = *nick = *ident = *host = *dhost = *fullname = *modes = *awaymsg = *oper = 0;
68 server = (char*)FindServerNamePtr(Config->ServerName);
70 lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
71 timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
72 haspassed = dns_done = false;
83 void userrec::MakeHost(char* nhost)
85 /* This is much faster than snprintf */
87 for(char* n = ident; *n; n++)
90 for(char* n = host; *n; n++)
95 void userrec::CloseSocket()
101 char* userrec::GetFullHost()
103 static char result[MAXBUF];
105 for(char* n = nick; *n; n++)
108 for(char* n = ident; *n; n++)
111 for(char* n = dhost; *n; n++)
117 char* userrec::MakeWildHost()
119 static char nresult[MAXBUF];
121 *t++ = '*'; *t++ = '!';
122 *t++ = '*'; *t++ = '@';
123 for(char* n = dhost; *n; n++)
129 int userrec::ReadData(void* buffer, size_t size)
133 return read(this->fd, buffer, size);
139 char* userrec::GetFullRealHost()
141 static char fresult[MAXBUF];
143 for(char* n = nick; *n; n++)
146 for(char* n = ident; *n; n++)
149 for(char* n = host; *n; n++)
155 bool userrec::IsInvited(irc::string &channel)
157 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
159 irc::string compare = i->channel;
160 if (compare == channel)
168 InvitedList* userrec::GetInviteList()
173 void userrec::InviteTo(irc::string &channel)
177 invites.push_back(i);
180 void userrec::RemoveInvite(irc::string &channel)
182 log(DEBUG,"Removing invites");
185 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
187 irc::string compare = i->channel;
188 if (compare == channel)
197 bool userrec::HasPermission(std::string &command)
199 char TypeName[MAXBUF],Classes[MAXBUF],ClassName[MAXBUF],CommandList[MAXBUF];
204 // users on remote servers can completely bypass
205 // all permissions based checks.
206 // This prevents desyncs when one server has different
207 // type/class tags to another.
211 // are they even an oper at all?
214 for (int j =0; j < Config->ConfValueEnum("type",&Config->config_f); j++)
216 Config->ConfValue("type","name",j,TypeName,&Config->config_f);
217 if (!strcmp(TypeName,this->oper))
219 Config->ConfValue("type","classes",j,Classes,&Config->config_f);
220 char* myclass = strtok_r(Classes," ",&savept);
223 for (int k =0; k < Config->ConfValueEnum("class",&Config->config_f); k++)
225 Config->ConfValue("class","name",k,ClassName,&Config->config_f);
226 if (!strcmp(ClassName,myclass))
228 Config->ConfValue("class","commands",k,CommandList,&Config->config_f);
229 mycmd = strtok_r(CommandList," ",&savept2);
232 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
236 mycmd = strtok_r(NULL," ",&savept2);
240 myclass = strtok_r(NULL," ",&savept);
249 bool userrec::AddBuffer(std::string a)
252 for (unsigned int i = 0; i < a.length(); i++)
253 if ((a[i] != '\r') && (a[i] != '\0') && (a[i] != 7))
255 std::stringstream stream(recvq);
257 recvq = stream.str();
259 // count the size of the first line in the buffer.
260 while (i < recvq.length())
262 if (recvq[i++] == '\n')
265 if (recvq.length() > (unsigned)this->recvqmax)
267 this->SetWriteError("RecvQ exceeded");
268 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
270 // return false if we've had more than 600 characters WITHOUT
271 // a carriage return (this is BAD, drop the socket)
275 bool userrec::BufferIsReady()
277 unsigned int t = recvq.length();
278 for (unsigned int i = 0; i < t; i++)
279 if (recvq[i] == '\n')
284 void userrec::ClearBuffer()
289 std::string userrec::GetBuffer()
293 char* line = (char*)recvq.c_str();
294 std::string ret = "";
295 while ((*line != '\n') && (*line))
300 if ((*line == '\n') || (*line == '\r'))
306 void userrec::AddWriteBuf(std::string data)
308 if (this->GetWriteError() != "")
310 if (sendq.length() + data.length() > (unsigned)this->sendqmax)
312 /* Fix by brain - Set the error text BEFORE calling writeopers, because
313 * if we dont it'll recursively call here over and over again trying
314 * to repeatedly add the text to the sendq!
316 this->SetWriteError("SendQ exceeded");
317 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
320 std::stringstream stream;
321 stream << sendq << data;
322 sendq = stream.str();
325 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
326 void userrec::FlushWriteBuf()
328 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
330 char* tb = (char*)this->sendq.c_str();
331 int n_sent = write(this->fd,tb,this->sendq.length());
334 this->SetWriteError(strerror(errno));
341 // update the user's stats counters
342 this->bytes_out += n_sent;
348 void userrec::SetWriteError(std::string error)
350 log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
351 // don't try to set the error twice, its already set take the first string.
352 if (this->WriteError == "")
353 this->WriteError = error;
356 std::string userrec::GetWriteError()
358 return this->WriteError;
361 void AddOper(userrec* user)
363 log(DEBUG,"Oper added to optimization list");
364 all_opers.push_back(user);
367 void DeleteOper(userrec* user)
369 for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
373 log(DEBUG,"Oper removed from optimization list");
380 void kill_link(userrec *user,const char* r)
382 user_hash::iterator iter = clientlist.find(user->nick);
386 strlcpy(reason,r,MAXBUF-1);
388 if (strlen(reason)>MAXQUIT)
390 reason[MAXQUIT-1] = '\0';
393 log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
394 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
395 log(DEBUG,"closing fd %d",user->fd);
397 if (user->registered == 7) {
398 purge_empty_chans(user);
399 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
400 WriteCommonExcept(user,"QUIT :%s",reason);
403 user->FlushWriteBuf();
405 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
409 if (Config->GetIOHook(user->port))
413 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
415 catch (ModuleException& modexcept)
417 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
420 ServerInstance->SE->DelFd(user->fd);
424 // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
425 // if they were an oper with +s.
426 if (user->registered == 7) {
427 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
429 WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
433 if (iter != clientlist.end())
435 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
438 fd_ref_table[user->fd] = NULL;
439 if (find(local_users.begin(),local_users.end(),user) != local_users.end())
441 local_users.erase(find(local_users.begin(),local_users.end(),user));
442 log(DEBUG,"Delete local user");
445 clientlist.erase(iter);
450 /* adds or updates an entry in the whowas list */
451 void AddWhoWas(userrec* u)
453 whowas_hash::iterator iter = whowas.find(u->nick);
454 WhoWasUser *a = new WhoWasUser();
455 strlcpy(a->nick,u->nick,NICKMAX-1);
456 strlcpy(a->ident,u->ident,IDENTMAX);
457 strlcpy(a->dhost,u->dhost,63);
458 strlcpy(a->host,u->host,63);
459 strlcpy(a->fullname,u->fullname,MAXGECOS);
461 strlcpy(a->server,u->server,256);
462 a->signon = u->signon;
464 /* MAX_WHOWAS: max number of /WHOWAS items
465 * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
466 * can be replaced by a newer one
469 if (iter == whowas.end())
471 if (whowas.size() >= (unsigned)WHOWAS_MAX)
473 for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
475 // 3600 seconds in an hour ;)
476 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
479 if (i->second) delete i->second;
481 // replace with new one
483 log(DEBUG,"added WHOWAS entry, purged an old record");
487 // no space left and user doesnt exist. Don't leave ram in use!
492 log(DEBUG,"added fresh WHOWAS entry");
498 log(DEBUG,"updated WHOWAS entry");
499 if (iter->second) delete iter->second;
504 /* add a client connection to the sockets list */
505 void AddClient(int socket, int port, bool iscached, in_addr ip4)
507 std::string tempnick = ConvToStr(socket) + "-unknown";
508 user_hash::iterator iter = clientlist.find(tempnick);
509 const char *ipaddr = inet_ntoa(ip4);
513 // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
514 // using one as a registered connection. As theyre per fd, we can also safely assume
515 // that we wont have collisions. Therefore, if the nick exists in the list, its only
516 // used by a dead socket, erase the iterator so that the new client may reclaim it.
517 // this was probably the cause of 'server ignores me when i hammer it with reconnects'
518 // issue in earlier alphas/betas
519 if (iter != clientlist.end())
521 userrec* goner = iter->second;
523 clientlist.erase(iter);
526 log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
528 clientlist[tempnick] = new userrec();
529 clientlist[tempnick]->fd = socket;
530 strlcpy(clientlist[tempnick]->nick,tempnick.c_str(),NICKMAX-1);
532 /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
533 for (char* temp = (char*)ipaddr; *temp && j < 64; temp++, j++)
534 clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = *temp;
535 clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = 0;
537 clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
538 /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
539 strcpy(clientlist[tempnick]->ident, "unknown");
541 clientlist[tempnick]->registered = 0;
542 clientlist[tempnick]->signon = TIME + Config->dns_timeout;
543 clientlist[tempnick]->lastping = 1;
544 clientlist[tempnick]->ip4 = ip4;
545 clientlist[tempnick]->port = port;
547 // set the registration timeout for this user
548 unsigned long class_regtimeout = 90;
550 long class_threshold = 5;
551 long class_sqmax = 262144; // 256kb
552 long class_rqmax = 4096; // 4k
554 for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
556 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
558 class_regtimeout = (unsigned long)i->registration_timeout;
559 class_flood = i->flood;
560 clientlist[tempnick]->pingmax = i->pingtime;
561 class_threshold = i->threshold;
562 class_sqmax = i->sendqmax;
563 class_rqmax = i->recvqmax;
568 clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
569 clientlist[tempnick]->timeout = TIME+class_regtimeout;
570 clientlist[tempnick]->flood = class_flood;
571 clientlist[tempnick]->threshold = class_threshold;
572 clientlist[tempnick]->sendqmax = class_sqmax;
573 clientlist[tempnick]->recvqmax = class_rqmax;
578 for (int i = 0; i < MAXCHANS; i++)
579 clientlist[tempnick]->chans.push_back(a);
581 fd_ref_table[socket] = clientlist[tempnick];
582 local_users.push_back(clientlist[tempnick]);
584 if (local_users.size() > Config->SoftLimit)
586 kill_link(clientlist[tempnick],"No more connections allowed");
590 if (local_users.size() >= MAXCLIENTS)
592 kill_link(clientlist[tempnick],"No more connections allowed");
596 // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
597 // its a pretty big but for the moment valid assumption:
598 // file descriptors are handed out starting at 0, and are recycled as theyre freed.
599 // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
600 // irc server at once (or the irc server otherwise initiating this many connections, files etc)
601 // which for the time being is a physical impossibility (even the largest networks dont have more
602 // than about 10,000 users on ONE server!)
603 if ((unsigned)socket >= MAX_DESCRIPTORS)
605 kill_link(clientlist[tempnick],"Server is full");
608 char* e = matches_exception(ipaddr);
611 char* r = matches_zline(ipaddr);
615 snprintf(reason,MAXBUF,"Z-Lined: %s",r);
616 kill_link(clientlist[tempnick],reason);
621 ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
623 WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname...");
626 long FindMatchingGlobal(userrec* user)
629 for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
631 if (a->second->ip4.s_addr == user->ip4.s_addr)
637 long FindMatchingLocal(userrec* user)
640 for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
642 userrec* comp = (userrec*)(*a);
643 if (comp->ip4.s_addr == user->ip4.s_addr)
649 void FullConnectUser(userrec* user, CullList* Goners)
651 ServerInstance->stats->statsConnects++;
652 user->idle_lastmsg = TIME;
653 log(DEBUG,"ConnectUser: %s",user->nick);
655 ConnectClass a = GetClass(user);
657 if (a.type == CC_DENY)
659 Goners->AddItem(user,"Unauthorised connection");
662 if ((*(a.pass.c_str())) && (!user->haspassed))
664 Goners->AddItem(user,"Invalid password");
667 if (FindMatchingLocal(user) > a.maxlocal)
669 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
670 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,(char*)inet_ntoa(user->ip4));
673 else if (FindMatchingGlobal(user) > a.maxglobal)
675 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
676 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,(char*)inet_ntoa(user->ip4));
680 char match_against[MAXBUF];
681 snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
682 char* e = matches_exception(match_against);
685 char* r = matches_gline(match_against);
689 snprintf(reason,MAXBUF,"G-Lined: %s",r);
690 Goners->AddItem(user,reason);
693 r = matches_kline(user->host);
697 snprintf(reason,MAXBUF,"K-Lined: %s",r);
698 Goners->AddItem(user,reason);
704 WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
705 WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
706 WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
707 WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
708 WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
709 // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
710 // so i'd better split it :)
711 std::stringstream out(Config->data005);
712 std::string token = "";
713 std::string line5 = "";
714 int token_counter = 0;
718 line5 = line5 + token + " ";
720 if ((token_counter >= 13) || (out.eof() == true))
722 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
729 // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
730 // onto the network and produce 'fake direction'
731 FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
732 FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
733 user->registered = 7;
734 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));
737 /* re-allocates a nick in the user_hash after they change nicknames,
738 * returns a pointer to the new user as it may have moved */
740 userrec* ReHashNick(char* Old, char* New)
742 //user_hash::iterator newnick;
743 user_hash::iterator oldnick = clientlist.find(Old);
745 log(DEBUG,"ReHashNick: %s %s",Old,New);
747 if (!strcasecmp(Old,New))
749 log(DEBUG,"old nick is new nick, skipping");
750 return oldnick->second;
753 if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
755 log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
757 userrec* olduser = oldnick->second;
758 clientlist[New] = olduser;
759 clientlist.erase(oldnick);
761 log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
763 return clientlist[New];
766 void force_nickchange(userrec* user,const char* newnick)
773 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
775 ServerInstance->stats->statsCollisions++;
776 kill_link(user,"Nickname collision");
779 if (matches_qline(newnick))
781 ServerInstance->stats->statsCollisions++;
782 kill_link(user,"Nickname collision");
790 strlcpy(nick,newnick,MAXBUF-1);
792 if (user->registered == 7)
796 std::string cmd = "NICK";
797 ServerInstance->Parser->CallHandler(cmd,pars,1,user);