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 typedef std::map<irc::string,char*> opertype_t;
58 typedef opertype_t operclass_t;
61 operclass_t operclass;
63 void ReadClassesAndTypes()
65 char TypeName[MAXBUF],Classes[MAXBUF],ClassName[MAXBUF],CommandList[MAXBUF];
66 for (opertype_t::iterator n = opertypes.begin(); n != opertypes.end(); n++)
71 for (operclass_t::iterator n = operclass.begin(); n != operclass.end(); n++)
78 for (int j =0; j < Config->ConfValueEnum("type",&Config->config_f); j++)
80 Config->ConfValue("type","name",j,TypeName,&Config->config_f);
81 Config->ConfValue("type","classes",j,Classes,&Config->config_f);
82 opertypes[TypeName] = sstrdup(Classes);
83 log(DEBUG,"Read oper TYPE '%s' with classes '%s'",TypeName,Classes);
85 for (int k =0; k < Config->ConfValueEnum("class",&Config->config_f); k++)
87 Config->ConfValue("class","name",k,ClassName,&Config->config_f);
88 Config->ConfValue("class","commands",k,CommandList,&Config->config_f);
89 operclass[ClassName] = sstrdup(CommandList);
90 log(DEBUG,"Read oper CLASS '%s' with commands '%s'",ClassName,CommandList);
94 template<typename T> inline string ConvToStr(const T &in)
97 if (!(tmp << in)) return string();
103 // the PROPER way to do it, AVOID bzero at *ALL* costs
104 *password = *nick = *ident = *host = *dhost = *fullname = *modes = *awaymsg = *oper = 0;
105 server = (char*)FindServerNamePtr(Config->ServerName);
107 lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
108 timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
109 haspassed = dns_done = false;
120 void userrec::MakeHost(char* nhost)
122 /* This is much faster than snprintf */
124 for(char* n = ident; *n; n++)
127 for(char* n = host; *n; n++)
132 void userrec::CloseSocket()
134 shutdown(this->fd,2);
138 char* userrec::GetFullHost()
140 static char result[MAXBUF];
142 for(char* n = nick; *n; n++)
145 for(char* n = ident; *n; n++)
148 for(char* n = dhost; *n; n++)
154 char* userrec::MakeWildHost()
156 static char nresult[MAXBUF];
158 *t++ = '*'; *t++ = '!';
159 *t++ = '*'; *t++ = '@';
160 for(char* n = dhost; *n; n++)
166 int userrec::ReadData(void* buffer, size_t size)
170 return read(this->fd, buffer, size);
176 char* userrec::GetFullRealHost()
178 static char fresult[MAXBUF];
180 for(char* n = nick; *n; n++)
183 for(char* n = ident; *n; n++)
186 for(char* n = host; *n; n++)
192 bool userrec::IsInvited(irc::string &channel)
194 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
196 irc::string compare = i->channel;
197 if (compare == channel)
205 InvitedList* userrec::GetInviteList()
210 void userrec::InviteTo(irc::string &channel)
214 invites.push_back(i);
217 void userrec::RemoveInvite(irc::string &channel)
219 log(DEBUG,"Removing invites");
222 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
224 irc::string compare = i->channel;
225 if (compare == channel)
234 bool userrec::HasPermission(std::string &command)
242 // users on remote servers can completely bypass
243 // all permissions based checks.
244 // This prevents desyncs when one server has different
245 // type/class tags to another.
249 // are they even an oper at all?
252 opertype_t::iterator iter_opertype = opertypes.find(this->oper);
253 if (iter_opertype != opertypes.end())
255 Classes = iter_opertype->second;
256 char* myclass = strtok_r(Classes," ",&savept);
259 operclass_t::iterator iter_operclass = operclass.find(myclass);
260 if (iter_operclass != operclass.end())
262 char* CommandList = iter_operclass->second;
263 mycmd = strtok_r(CommandList," ",&savept2);
266 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
270 mycmd = strtok_r(NULL," ",&savept2);
273 myclass = strtok_r(NULL," ",&savept);
281 bool userrec::AddBuffer(std::string a)
284 for (unsigned int i = 0; i < a.length(); i++)
285 if ((a[i] != '\r') && (a[i] != '\0') && (a[i] != 7))
287 std::stringstream stream(recvq);
289 recvq = stream.str();
291 // count the size of the first line in the buffer.
292 while (i < recvq.length())
294 if (recvq[i++] == '\n')
297 if (recvq.length() > (unsigned)this->recvqmax)
299 this->SetWriteError("RecvQ exceeded");
300 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
302 // return false if we've had more than 600 characters WITHOUT
303 // a carriage return (this is BAD, drop the socket)
307 bool userrec::BufferIsReady()
309 unsigned int t = recvq.length();
310 for (unsigned int i = 0; i < t; i++)
311 if (recvq[i] == '\n')
316 void userrec::ClearBuffer()
321 std::string userrec::GetBuffer()
325 char* line = (char*)recvq.c_str();
326 std::string ret = "";
327 while ((*line != '\n') && (*line))
332 if ((*line == '\n') || (*line == '\r'))
338 void userrec::AddWriteBuf(std::string data)
340 if (this->GetWriteError() != "")
342 if (sendq.length() + data.length() > (unsigned)this->sendqmax)
344 /* Fix by brain - Set the error text BEFORE calling writeopers, because
345 * if we dont it'll recursively call here over and over again trying
346 * to repeatedly add the text to the sendq!
348 this->SetWriteError("SendQ exceeded");
349 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
352 std::stringstream stream;
353 stream << sendq << data;
354 sendq = stream.str();
357 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
358 void userrec::FlushWriteBuf()
360 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
362 char* tb = (char*)this->sendq.c_str();
363 int n_sent = write(this->fd,tb,this->sendq.length());
366 this->SetWriteError(strerror(errno));
373 // update the user's stats counters
374 this->bytes_out += n_sent;
380 void userrec::SetWriteError(std::string error)
382 log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
383 // don't try to set the error twice, its already set take the first string.
384 if (this->WriteError == "")
385 this->WriteError = error;
388 std::string userrec::GetWriteError()
390 return this->WriteError;
393 void AddOper(userrec* user)
395 log(DEBUG,"Oper added to optimization list");
396 all_opers.push_back(user);
399 void DeleteOper(userrec* user)
401 for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
405 log(DEBUG,"Oper removed from optimization list");
412 void kill_link(userrec *user,const char* r)
414 user_hash::iterator iter = clientlist.find(user->nick);
418 strlcpy(reason,r,MAXBUF-1);
420 if (strlen(reason)>MAXQUIT)
422 reason[MAXQUIT-1] = '\0';
425 log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
426 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
427 log(DEBUG,"closing fd %d",user->fd);
429 if (user->registered == 7) {
430 purge_empty_chans(user);
431 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
432 WriteCommonExcept(user,"QUIT :%s",reason);
435 user->FlushWriteBuf();
437 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
441 if (Config->GetIOHook(user->port))
445 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
447 catch (ModuleException& modexcept)
449 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
452 ServerInstance->SE->DelFd(user->fd);
456 // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
457 // if they were an oper with +s.
458 if (user->registered == 7) {
459 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
461 WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
465 if (iter != clientlist.end())
467 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
470 fd_ref_table[user->fd] = NULL;
471 if (find(local_users.begin(),local_users.end(),user) != local_users.end())
473 local_users.erase(find(local_users.begin(),local_users.end(),user));
474 log(DEBUG,"Delete local user");
477 clientlist.erase(iter);
482 /* adds or updates an entry in the whowas list */
483 void AddWhoWas(userrec* u)
485 whowas_hash::iterator iter = whowas.find(u->nick);
486 WhoWasUser *a = new WhoWasUser();
487 strlcpy(a->nick,u->nick,NICKMAX-1);
488 strlcpy(a->ident,u->ident,IDENTMAX);
489 strlcpy(a->dhost,u->dhost,63);
490 strlcpy(a->host,u->host,63);
491 strlcpy(a->fullname,u->fullname,MAXGECOS);
493 strlcpy(a->server,u->server,256);
494 a->signon = u->signon;
496 /* MAX_WHOWAS: max number of /WHOWAS items
497 * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
498 * can be replaced by a newer one
501 if (iter == whowas.end())
503 if (whowas.size() >= (unsigned)WHOWAS_MAX)
505 for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
507 // 3600 seconds in an hour ;)
508 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
511 if (i->second) delete i->second;
513 // replace with new one
515 log(DEBUG,"added WHOWAS entry, purged an old record");
519 // no space left and user doesnt exist. Don't leave ram in use!
524 log(DEBUG,"added fresh WHOWAS entry");
530 log(DEBUG,"updated WHOWAS entry");
531 if (iter->second) delete iter->second;
536 /* add a client connection to the sockets list */
537 void AddClient(int socket, int port, bool iscached, in_addr ip4)
539 std::string tempnick = ConvToStr(socket) + "-unknown";
540 user_hash::iterator iter = clientlist.find(tempnick);
541 const char *ipaddr = inet_ntoa(ip4);
545 // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
546 // using one as a registered connection. As theyre per fd, we can also safely assume
547 // that we wont have collisions. Therefore, if the nick exists in the list, its only
548 // used by a dead socket, erase the iterator so that the new client may reclaim it.
549 // this was probably the cause of 'server ignores me when i hammer it with reconnects'
550 // issue in earlier alphas/betas
551 if (iter != clientlist.end())
553 userrec* goner = iter->second;
555 clientlist.erase(iter);
558 log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
560 clientlist[tempnick] = new userrec();
561 clientlist[tempnick]->fd = socket;
562 strlcpy(clientlist[tempnick]->nick,tempnick.c_str(),NICKMAX-1);
564 /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
565 for (char* temp = (char*)ipaddr; *temp && j < 64; temp++, j++)
566 clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = *temp;
567 clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = 0;
569 clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
570 /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
571 strcpy(clientlist[tempnick]->ident, "unknown");
573 clientlist[tempnick]->registered = 0;
574 clientlist[tempnick]->signon = TIME + Config->dns_timeout;
575 clientlist[tempnick]->lastping = 1;
576 clientlist[tempnick]->ip4 = ip4;
577 clientlist[tempnick]->port = port;
579 // set the registration timeout for this user
580 unsigned long class_regtimeout = 90;
582 long class_threshold = 5;
583 long class_sqmax = 262144; // 256kb
584 long class_rqmax = 4096; // 4k
586 for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
588 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
590 class_regtimeout = (unsigned long)i->registration_timeout;
591 class_flood = i->flood;
592 clientlist[tempnick]->pingmax = i->pingtime;
593 class_threshold = i->threshold;
594 class_sqmax = i->sendqmax;
595 class_rqmax = i->recvqmax;
600 clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
601 clientlist[tempnick]->timeout = TIME+class_regtimeout;
602 clientlist[tempnick]->flood = class_flood;
603 clientlist[tempnick]->threshold = class_threshold;
604 clientlist[tempnick]->sendqmax = class_sqmax;
605 clientlist[tempnick]->recvqmax = class_rqmax;
610 for (int i = 0; i < MAXCHANS; i++)
611 clientlist[tempnick]->chans.push_back(a);
613 fd_ref_table[socket] = clientlist[tempnick];
614 local_users.push_back(clientlist[tempnick]);
616 if (local_users.size() > Config->SoftLimit)
618 kill_link(clientlist[tempnick],"No more connections allowed");
622 if (local_users.size() >= MAXCLIENTS)
624 kill_link(clientlist[tempnick],"No more connections allowed");
628 // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
629 // its a pretty big but for the moment valid assumption:
630 // file descriptors are handed out starting at 0, and are recycled as theyre freed.
631 // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
632 // irc server at once (or the irc server otherwise initiating this many connections, files etc)
633 // which for the time being is a physical impossibility (even the largest networks dont have more
634 // than about 10,000 users on ONE server!)
635 if ((unsigned)socket >= MAX_DESCRIPTORS)
637 kill_link(clientlist[tempnick],"Server is full");
640 char* e = matches_exception(ipaddr);
643 char* r = matches_zline(ipaddr);
647 snprintf(reason,MAXBUF,"Z-Lined: %s",r);
648 kill_link(clientlist[tempnick],reason);
653 ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
655 WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname...");
658 long FindMatchingGlobal(userrec* user)
661 for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
663 if (a->second->ip4.s_addr == user->ip4.s_addr)
669 long FindMatchingLocal(userrec* user)
672 for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
674 userrec* comp = (userrec*)(*a);
675 if (comp->ip4.s_addr == user->ip4.s_addr)
681 void FullConnectUser(userrec* user, CullList* Goners)
683 ServerInstance->stats->statsConnects++;
684 user->idle_lastmsg = TIME;
685 log(DEBUG,"ConnectUser: %s",user->nick);
687 ConnectClass a = GetClass(user);
689 if (a.type == CC_DENY)
691 Goners->AddItem(user,"Unauthorised connection");
694 if ((*(a.pass.c_str())) && (!user->haspassed))
696 Goners->AddItem(user,"Invalid password");
699 if (FindMatchingLocal(user) > a.maxlocal)
701 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
702 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,(char*)inet_ntoa(user->ip4));
705 else if (FindMatchingGlobal(user) > a.maxglobal)
707 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
708 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,(char*)inet_ntoa(user->ip4));
712 char match_against[MAXBUF];
713 snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
714 char* e = matches_exception(match_against);
717 char* r = matches_gline(match_against);
721 snprintf(reason,MAXBUF,"G-Lined: %s",r);
722 Goners->AddItem(user,reason);
725 r = matches_kline(user->host);
729 snprintf(reason,MAXBUF,"K-Lined: %s",r);
730 Goners->AddItem(user,reason);
736 WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
737 WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
738 WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
739 WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
740 WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
741 // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
742 // so i'd better split it :)
743 std::stringstream out(Config->data005);
744 std::string token = "";
745 std::string line5 = "";
746 int token_counter = 0;
750 line5 = line5 + token + " ";
752 if ((token_counter >= 13) || (out.eof() == true))
754 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
761 // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
762 // onto the network and produce 'fake direction'
763 FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
764 FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
765 user->registered = 7;
766 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));
769 /* re-allocates a nick in the user_hash after they change nicknames,
770 * returns a pointer to the new user as it may have moved */
772 userrec* ReHashNick(char* Old, char* New)
774 //user_hash::iterator newnick;
775 user_hash::iterator oldnick = clientlist.find(Old);
777 log(DEBUG,"ReHashNick: %s %s",Old,New);
779 if (!strcasecmp(Old,New))
781 log(DEBUG,"old nick is new nick, skipping");
782 return oldnick->second;
785 if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
787 log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
789 userrec* olduser = oldnick->second;
790 clientlist[New] = olduser;
791 clientlist.erase(oldnick);
793 log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
795 return clientlist[New];
798 void force_nickchange(userrec* user,const char* newnick)
805 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
807 ServerInstance->stats->statsCollisions++;
808 kill_link(user,"Nickname collision");
811 if (matches_qline(newnick))
813 ServerInstance->stats->statsCollisions++;
814 kill_link(user,"Nickname collision");
822 strlcpy(nick,newnick,MAXBUF-1);
824 if (user->registered == 7)
828 std::string cmd = "NICK";
829 ServerInstance->Parser->CallHandler(cmd,pars,1,user);