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;
55 extern std::vector<userrec*> local_users;
57 std::vector<userrec*> all_opers;
59 typedef std::map<irc::string,char*> opertype_t;
60 typedef opertype_t operclass_t;
63 operclass_t operclass;
65 void ReadClassesAndTypes()
67 char TypeName[MAXBUF],Classes[MAXBUF],ClassName[MAXBUF],CommandList[MAXBUF];
68 for (opertype_t::iterator n = opertypes.begin(); n != opertypes.end(); n++)
73 for (operclass_t::iterator n = operclass.begin(); n != operclass.end(); n++)
80 for (int j =0; j < Config->ConfValueEnum("type",&Config->config_f); j++)
82 Config->ConfValue("type","name",j,TypeName,&Config->config_f);
83 Config->ConfValue("type","classes",j,Classes,&Config->config_f);
84 opertypes[TypeName] = strdup(Classes);
85 log(DEBUG,"Read oper TYPE '%s' with classes '%s'",TypeName,Classes);
87 for (int k =0; k < Config->ConfValueEnum("class",&Config->config_f); k++)
89 Config->ConfValue("class","name",k,ClassName,&Config->config_f);
90 Config->ConfValue("class","commands",k,CommandList,&Config->config_f);
91 operclass[ClassName] = strdup(CommandList);
92 log(DEBUG,"Read oper CLASS '%s' with commands '%s'",ClassName,CommandList);
96 template<typename T> inline string ConvToStr(const T &in)
99 if (!(tmp << in)) return string();
105 // the PROPER way to do it, AVOID bzero at *ALL* costs
106 *password = *nick = *ident = *host = *dhost = *fullname = *modes = *awaymsg = *oper = 0;
107 server = (char*)FindServerNamePtr(Config->ServerName);
109 lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
110 timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
111 haspassed = dns_done = false;
122 void userrec::MakeHost(char* nhost)
124 /* This is much faster than snprintf */
126 for(char* n = ident; *n; n++)
129 for(char* n = host; *n; n++)
134 void userrec::CloseSocket()
136 shutdown(this->fd,2);
140 char* userrec::GetFullHost()
142 static char result[MAXBUF];
144 for(char* n = nick; *n; n++)
147 for(char* n = ident; *n; n++)
150 for(char* n = dhost; *n; n++)
156 char* userrec::MakeWildHost()
158 static char nresult[MAXBUF];
160 *t++ = '*'; *t++ = '!';
161 *t++ = '*'; *t++ = '@';
162 for(char* n = dhost; *n; n++)
168 int userrec::ReadData(void* buffer, size_t size)
172 return read(this->fd, buffer, size);
178 char* userrec::GetFullRealHost()
180 static char fresult[MAXBUF];
182 for(char* n = nick; *n; n++)
185 for(char* n = ident; *n; n++)
188 for(char* n = host; *n; n++)
194 bool userrec::IsInvited(irc::string &channel)
196 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
198 irc::string compare = i->channel;
199 if (compare == channel)
207 InvitedList* userrec::GetInviteList()
212 void userrec::InviteTo(irc::string &channel)
216 invites.push_back(i);
219 void userrec::RemoveInvite(irc::string &channel)
221 log(DEBUG,"Removing invites");
224 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
226 irc::string compare = i->channel;
227 if (compare == channel)
236 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 char* Classes = strdup(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 = strdup(iter_operclass->second);
263 mycmd = strtok_r(CommandList," ",&savept2);
266 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
272 mycmd = strtok_r(NULL," ",&savept2);
276 myclass = strtok_r(NULL," ",&savept);
285 bool userrec::AddBuffer(std::string a)
288 char* n = (char*)a.c_str();
289 for (char* i = n; *i; i++)
291 if ((*i != '\r') && (*i != '\0') && (*i != 7))
294 std::stringstream stream(recvq);
296 recvq = stream.str();
298 // count the size of the first line in the buffer.
299 while (i < recvq.length())
301 if (recvq[i++] == '\n')
304 if (recvq.length() > (unsigned)this->recvqmax)
306 this->SetWriteError("RecvQ exceeded");
307 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
309 // return false if we've had more than 600 characters WITHOUT
310 // a carriage return (this is BAD, drop the socket)
314 bool userrec::BufferIsReady()
316 unsigned int t = recvq.length();
317 for (unsigned int i = 0; i < t; i++)
318 if (recvq[i] == '\n')
323 void userrec::ClearBuffer()
328 std::string userrec::GetBuffer()
332 char* line = (char*)recvq.c_str();
333 std::string ret = "";
334 while ((*line != '\n') && (*line))
339 if ((*line == '\n') || (*line == '\r'))
345 void userrec::AddWriteBuf(std::string data)
347 if (this->GetWriteError() != "")
349 if (sendq.length() + data.length() > (unsigned)this->sendqmax)
351 /* Fix by brain - Set the error text BEFORE calling writeopers, because
352 * if we dont it'll recursively call here over and over again trying
353 * to repeatedly add the text to the sendq!
355 this->SetWriteError("SendQ exceeded");
356 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
359 std::stringstream stream;
360 stream << sendq << data;
361 sendq = stream.str();
364 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
365 void userrec::FlushWriteBuf()
367 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
369 char* tb = (char*)this->sendq.c_str();
370 int n_sent = write(this->fd,tb,this->sendq.length());
373 this->SetWriteError(strerror(errno));
380 // update the user's stats counters
381 this->bytes_out += n_sent;
387 void userrec::SetWriteError(std::string error)
389 log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
390 // don't try to set the error twice, its already set take the first string.
391 if (this->WriteError == "")
392 this->WriteError = error;
395 std::string userrec::GetWriteError()
397 return this->WriteError;
400 void AddOper(userrec* user)
402 log(DEBUG,"Oper added to optimization list");
403 all_opers.push_back(user);
406 void DeleteOper(userrec* user)
408 for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
412 log(DEBUG,"Oper removed from optimization list");
419 void kill_link(userrec *user,const char* r)
421 user_hash::iterator iter = clientlist.find(user->nick);
425 strlcpy(reason,r,MAXQUIT-1);
427 log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
428 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
429 log(DEBUG,"closing fd %d",user->fd);
431 if (user->registered == 7) {
432 purge_empty_chans(user);
433 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
434 WriteCommonExcept(user,"QUIT :%s",reason);
437 user->FlushWriteBuf();
439 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
443 if (Config->GetIOHook(user->port))
447 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
449 catch (ModuleException& modexcept)
451 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
454 ServerInstance->SE->DelFd(user->fd);
458 // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
459 // if they were an oper with +s.
460 if (user->registered == 7) {
461 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
463 WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
467 if (iter != clientlist.end())
469 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
472 fd_ref_table[user->fd] = NULL;
473 if (find(local_users.begin(),local_users.end(),user) != local_users.end())
475 local_users.erase(find(local_users.begin(),local_users.end(),user));
476 log(DEBUG,"Delete local user");
479 clientlist.erase(iter);
484 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
486 this->host = strdup(user->host);
487 this->dhost = strdup(user->dhost);
488 this->ident = strdup(user->ident);
489 this->server = user->server;
490 this->gecos = strdup(user->fullname);
493 WhoWasGroup::~WhoWasGroup()
505 /* adds or updates an entry in the whowas list */
506 void AddWhoWas(userrec* u)
508 whowas_users::iterator iter = whowas.find(u->nick);
509 if (iter == whowas.end())
511 whowas_set* n = new whowas_set;
512 WhoWasGroup *a = new WhoWasGroup(u);
518 whowas_set* group = (whowas_set*)iter->second;
519 if (group->size() > 10)
523 WhoWasGroup *a = new WhoWasGroup(u);
528 /* every hour, run this function which removes all entries over 3 days */
529 void MaintainWhoWas(time_t TIME)
531 for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
533 whowas_set* n = (whowas_set*)iter->second;
536 while ((n->begin() != n->end()) && ((*n->begin())->signon < TIME - 259200)) // 3 days
538 WhoWasGroup *a = *(n->begin());
540 n->erase(n->begin());
546 /* add a client connection to the sockets list */
547 void AddClient(int socket, int port, bool iscached, in_addr ip4)
549 std::string tempnick = ConvToStr(socket) + "-unknown";
550 user_hash::iterator iter = clientlist.find(tempnick);
551 const char *ipaddr = inet_ntoa(ip4);
555 // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
556 // using one as a registered connection. As theyre per fd, we can also safely assume
557 // that we wont have collisions. Therefore, if the nick exists in the list, its only
558 // used by a dead socket, erase the iterator so that the new client may reclaim it.
559 // this was probably the cause of 'server ignores me when i hammer it with reconnects'
560 // issue in earlier alphas/betas
561 if (iter != clientlist.end())
563 userrec* goner = iter->second;
565 clientlist.erase(iter);
568 log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
570 clientlist[tempnick] = new userrec();
571 clientlist[tempnick]->fd = socket;
572 strlcpy(clientlist[tempnick]->nick,tempnick.c_str(),NICKMAX-1);
574 /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
575 for (char* temp = (char*)ipaddr; *temp && j < 64; temp++, j++)
576 clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = *temp;
577 clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = 0;
579 clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
580 /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
581 strcpy(clientlist[tempnick]->ident, "unknown");
583 clientlist[tempnick]->registered = 0;
584 clientlist[tempnick]->signon = TIME + Config->dns_timeout;
585 clientlist[tempnick]->lastping = 1;
586 clientlist[tempnick]->ip4 = ip4;
587 clientlist[tempnick]->port = port;
589 // set the registration timeout for this user
590 unsigned long class_regtimeout = 90;
592 long class_threshold = 5;
593 long class_sqmax = 262144; // 256kb
594 long class_rqmax = 4096; // 4k
596 for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
598 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
600 class_regtimeout = (unsigned long)i->registration_timeout;
601 class_flood = i->flood;
602 clientlist[tempnick]->pingmax = i->pingtime;
603 class_threshold = i->threshold;
604 class_sqmax = i->sendqmax;
605 class_rqmax = i->recvqmax;
610 clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
611 clientlist[tempnick]->timeout = TIME+class_regtimeout;
612 clientlist[tempnick]->flood = class_flood;
613 clientlist[tempnick]->threshold = class_threshold;
614 clientlist[tempnick]->sendqmax = class_sqmax;
615 clientlist[tempnick]->recvqmax = class_rqmax;
620 clientlist[tempnick]->chans.resize(MAXCHANS);
622 fd_ref_table[socket] = clientlist[tempnick];
623 local_users.push_back(clientlist[tempnick]);
625 if (local_users.size() > Config->SoftLimit)
627 kill_link(clientlist[tempnick],"No more connections allowed");
631 if (local_users.size() >= MAXCLIENTS)
633 kill_link(clientlist[tempnick],"No more connections allowed");
637 // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
638 // its a pretty big but for the moment valid assumption:
639 // file descriptors are handed out starting at 0, and are recycled as theyre freed.
640 // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
641 // irc server at once (or the irc server otherwise initiating this many connections, files etc)
642 // which for the time being is a physical impossibility (even the largest networks dont have more
643 // than about 10,000 users on ONE server!)
644 if ((unsigned)socket >= MAX_DESCRIPTORS)
646 kill_link(clientlist[tempnick],"Server is full");
649 char* e = matches_exception(ipaddr);
652 char* r = matches_zline(ipaddr);
656 snprintf(reason,MAXBUF,"Z-Lined: %s",r);
657 kill_link(clientlist[tempnick],reason);
662 ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
664 WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname...");
667 long FindMatchingGlobal(userrec* user)
670 for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
672 if (a->second->ip4.s_addr == user->ip4.s_addr)
678 long FindMatchingLocal(userrec* user)
681 for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
683 userrec* comp = (userrec*)(*a);
684 if (comp->ip4.s_addr == user->ip4.s_addr)
690 void FullConnectUser(userrec* user, CullList* Goners)
692 ServerInstance->stats->statsConnects++;
693 user->idle_lastmsg = TIME;
694 log(DEBUG,"ConnectUser: %s",user->nick);
696 ConnectClass a = GetClass(user);
698 if (a.type == CC_DENY)
700 Goners->AddItem(user,"Unauthorised connection");
703 if ((*(a.pass.c_str())) && (!user->haspassed))
705 Goners->AddItem(user,"Invalid password");
708 if (FindMatchingLocal(user) > a.maxlocal)
710 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
711 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,(char*)inet_ntoa(user->ip4));
714 else if (FindMatchingGlobal(user) > a.maxglobal)
716 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
717 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,(char*)inet_ntoa(user->ip4));
721 char match_against[MAXBUF];
722 snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
723 char* e = matches_exception(match_against);
726 char* r = matches_gline(match_against);
730 snprintf(reason,MAXBUF,"G-Lined: %s",r);
731 Goners->AddItem(user,reason);
734 r = matches_kline(user->host);
738 snprintf(reason,MAXBUF,"K-Lined: %s",r);
739 Goners->AddItem(user,reason);
745 WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
746 WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
747 WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
748 WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
749 WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
750 // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
751 // so i'd better split it :)
752 std::stringstream out(Config->data005);
753 std::string token = "";
754 std::string line5 = "";
755 int token_counter = 0;
759 line5 = line5 + token + " ";
761 if ((token_counter >= 13) || (out.eof() == true))
763 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
770 // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
771 // onto the network and produce 'fake direction'
772 FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
773 FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
774 user->registered = 7;
775 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));
778 /* re-allocates a nick in the user_hash after they change nicknames,
779 * returns a pointer to the new user as it may have moved */
781 userrec* ReHashNick(char* Old, char* New)
783 //user_hash::iterator newnick;
784 user_hash::iterator oldnick = clientlist.find(Old);
786 log(DEBUG,"ReHashNick: %s %s",Old,New);
788 if (!strcasecmp(Old,New))
790 log(DEBUG,"old nick is new nick, skipping");
791 return oldnick->second;
794 if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
796 log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
798 userrec* olduser = oldnick->second;
799 clientlist[New] = olduser;
800 clientlist.erase(oldnick);
802 log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
804 return clientlist[New];
807 void force_nickchange(userrec* user,const char* newnick)
814 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
816 ServerInstance->stats->statsCollisions++;
817 kill_link(user,"Nickname collision");
820 if (matches_qline(newnick))
822 ServerInstance->stats->statsCollisions++;
823 kill_link(user,"Nickname collision");
831 strlcpy(nick,newnick,MAXBUF-1);
833 if (user->registered == 7)
837 std::string cmd = "NICK";
838 ServerInstance->Parser->CallHandler(cmd,pars,1,user);