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 bool InitTypes(const char* tag)
67 for (opertype_t::iterator n = opertypes.begin(); n != opertypes.end(); n++)
77 bool InitClasses(const char* tag)
79 for (operclass_t::iterator n = operclass.begin(); n != operclass.end(); n++)
89 bool DoType(const char* tag, char** entries, void** values, int* types)
91 char* TypeName = (char*)values[0];
92 char* Classes = (char*)values[1];
94 opertypes[TypeName] = strdup(Classes);
95 log(DEBUG,"Read oper TYPE '%s' with classes '%s'",TypeName,Classes);
99 bool DoClass(const char* tag, char** entries, void** values, int* types)
101 char* ClassName = (char*)values[0];
102 char* CommandList = (char*)values[1];
104 operclass[ClassName] = strdup(CommandList);
105 log(DEBUG,"Read oper CLASS '%s' with commands '%s'",ClassName,CommandList);
109 bool DoneClassesAndTypes(const char* tag)
116 // the PROPER way to do it, AVOID bzero at *ALL* costs
117 *password = *nick = *ident = *host = *dhost = *fullname = *modes = *awaymsg = *oper = 0;
118 server = (char*)FindServerNamePtr(Config->ServerName);
120 lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
121 modebits = timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
122 haspassed = dns_done = false;
127 chans.resize(MAXCHANS);
129 for (unsigned int n = 0; n < MAXCHANS; n++)
131 ucrec* x = new ucrec();
140 for (std::vector<ucrec*>::iterator n = chans.begin(); n != chans.end(); n++)
142 ucrec* x = (ucrec*)*n;
147 /* XXX - minor point, other *Host functions return a char *, this one creates it. Might be nice to be consistant? */
148 void userrec::MakeHost(char* nhost)
150 /* This is much faster than snprintf */
152 for(char* n = ident; *n; n++)
155 for(char* n = host; *n; n++)
160 void userrec::CloseSocket()
162 shutdown(this->fd,2);
166 char* userrec::GetFullHost()
168 static char result[MAXBUF];
170 for(char* n = nick; *n; n++)
173 for(char* n = ident; *n; n++)
176 for(char* n = dhost; *n; n++)
182 char* userrec::MakeWildHost()
184 static char nresult[MAXBUF];
186 *t++ = '*'; *t++ = '!';
187 *t++ = '*'; *t++ = '@';
188 for(char* n = dhost; *n; n++)
194 int userrec::ReadData(void* buffer, size_t size)
198 return read(this->fd, buffer, size);
205 char* userrec::GetFullRealHost()
207 static char fresult[MAXBUF];
209 for(char* n = nick; *n; n++)
212 for(char* n = ident; *n; n++)
215 for(char* n = host; *n; n++)
221 bool userrec::IsInvited(irc::string &channel)
223 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
225 irc::string compare = i->channel;
227 if (compare == channel)
236 InvitedList* userrec::GetInviteList()
241 void userrec::InviteTo(irc::string &channel)
246 invites.push_back(i);
249 void userrec::RemoveInvite(irc::string &channel)
251 log(DEBUG,"Removing invites");
255 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
257 irc::string compare = i->channel;
259 if (compare == channel)
268 bool userrec::HasPermission(const std::string &command)
275 * users on remote servers can completely bypass all permissions based checks.
276 * This prevents desyncs when one server has different type/class tags to another.
277 * That having been said, this does open things up to the possibility of source changes
278 * allowing remote kills, etc - but if they have access to the src, they most likely have
279 * access to the conf - so it's an end to a means either way.
284 // are they even an oper at all?
287 opertype_t::iterator iter_opertype = opertypes.find(this->oper);
288 if (iter_opertype != opertypes.end())
290 char* Classes = strdup(iter_opertype->second);
291 char* myclass = strtok_r(Classes," ",&savept);
294 operclass_t::iterator iter_operclass = operclass.find(myclass);
295 if (iter_operclass != operclass.end())
297 char* CommandList = strdup(iter_operclass->second);
298 mycmd = strtok_r(CommandList," ",&savept2);
301 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
307 mycmd = strtok_r(NULL," ",&savept2);
311 myclass = strtok_r(NULL," ",&savept);
320 bool userrec::AddBuffer(const std::string &a)
323 char* n = (char*)a.c_str();
325 for (char* i = n; *i; i++)
327 if ((*i != '\r') && (*i != '\0') && (*i != 7))
334 // count the size of the first line in the buffer.
335 while (i < recvq.length())
337 if (recvq[i++] == '\n')
340 if (recvq.length() > (unsigned)this->recvqmax)
342 this->SetWriteError("RecvQ exceeded");
343 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
347 * return false if we've had more than 600 characters WITHOUT
348 * a carriage return (this is BAD, drop the socket)
353 bool userrec::BufferIsReady()
355 unsigned int t = recvq.length();
357 for (unsigned int i = 0; i < t; i++)
358 if (recvq[i] == '\n')
363 void userrec::ClearBuffer()
368 std::string userrec::GetBuffer()
373 char* line = (char*)recvq.c_str();
375 std::string ret = "";
377 while ((*line != '\n') && (*line))
383 while ((*line == '\n') || (*line == '\r'))
391 void userrec::AddWriteBuf(const std::string &data)
393 if (*this->GetWriteError())
396 if (sendq.length() + data.length() > (unsigned)this->sendqmax)
399 * Fix by brain - Set the error text BEFORE calling writeopers, because
400 * if we dont it'll recursively call here over and over again trying
401 * to repeatedly add the text to the sendq!
403 this->SetWriteError("SendQ exceeded");
404 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
411 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
412 void userrec::FlushWriteBuf()
414 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
416 char* tb = (char*)this->sendq.c_str();
417 int n_sent = write(this->fd,tb,this->sendq.length());
420 this->SetWriteError(strerror(errno));
427 // update the user's stats counters
428 this->bytes_out += n_sent;
434 void userrec::SetWriteError(const std::string &error)
436 log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
437 // don't try to set the error twice, its already set take the first string.
438 if (this->WriteError == "")
439 this->WriteError = error;
442 const char* userrec::GetWriteError()
444 return this->WriteError.c_str();
447 void AddOper(userrec* user)
449 log(DEBUG,"Oper added to optimization list");
450 all_opers.push_back(user);
453 void DeleteOper(userrec* user)
455 for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
459 log(DEBUG,"Oper removed from optimization list");
466 void kill_link(userrec *user,const char* r)
468 user_hash::iterator iter = clientlist.find(user->nick);
471 * I'm pretty sure returning here is causing a desync when part of the net thinks a user is gone,
472 * and another part doesn't. We want to broadcast the quit/kill before bailing so the net stays in sync.
474 * I can't imagine this blowing up, so I'm commenting it out. We still check
475 * before playing with a bad iterator below in our if(). DISCUSS THIS BEFORE YOU DO ANYTHING. --w00t
477 * if (iter == clientlist.end())
483 strlcpy(reason,r,MAXQUIT-1);
484 log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
487 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
489 if (user->registered == 7)
491 purge_empty_chans(user);
492 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
493 WriteCommonExcept(user,"QUIT :%s",reason);
497 user->FlushWriteBuf();
499 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
503 if (Config->GetIOHook(user->port))
507 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
509 catch (ModuleException& modexcept)
511 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
515 ServerInstance->SE->DelFd(user->fd);
520 * this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
521 * if they were an oper with +s.
524 * In the current implementation, we only show local quits, as we only show local connects. With
525 * the proposed implmentation of snomasks however, this will likely change in the (near?) future.
527 if (user->registered == 7)
530 WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
534 if (iter != clientlist.end())
536 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
539 fd_ref_table[user->fd] = NULL;
540 if (find(local_users.begin(),local_users.end(),user) != local_users.end())
542 local_users.erase(find(local_users.begin(),local_users.end(),user));
543 log(DEBUG,"Delete local user");
546 clientlist.erase(iter);
551 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
553 this->host = strdup(user->host);
554 this->dhost = strdup(user->dhost);
555 this->ident = strdup(user->ident);
556 this->server = user->server;
557 this->gecos = strdup(user->fullname);
560 WhoWasGroup::~WhoWasGroup()
572 /* adds or updates an entry in the whowas list */
573 void AddWhoWas(userrec* u)
575 whowas_users::iterator iter = whowas.find(u->nick);
577 if (iter == whowas.end())
579 whowas_set* n = new whowas_set;
580 WhoWasGroup *a = new WhoWasGroup(u);
586 whowas_set* group = (whowas_set*)iter->second;
588 if (group->size() > 10)
590 WhoWasGroup *a = (WhoWasGroup*)*(group->begin());
595 WhoWasGroup *a = new WhoWasGroup(u);
600 /* every hour, run this function which removes all entries over 3 days */
601 void MaintainWhoWas(time_t TIME)
603 for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
605 whowas_set* n = (whowas_set*)iter->second;
608 while ((n->begin() != n->end()) && ((*n->begin())->signon < TIME - 259200)) // 3 days
610 WhoWasGroup *a = *(n->begin());
612 n->erase(n->begin());
618 /* add a client connection to the sockets list */
619 void AddClient(int socket, int port, bool iscached, in_addr ip4)
621 std::string tempnick = ConvToStr(socket) + "-unknown";
622 user_hash::iterator iter = clientlist.find(tempnick);
623 const char *ipaddr = inet_ntoa(ip4);
628 * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
629 * using one as a registered connection. As they are per fd, we can also safely assume
630 * that we wont have collisions. Therefore, if the nick exists in the list, its only
631 * used by a dead socket, erase the iterator so that the new client may reclaim it.
632 * this was probably the cause of 'server ignores me when i hammer it with reconnects'
633 * issue in earlier alphas/betas
635 if (iter != clientlist.end())
637 userrec* goner = iter->second;
639 clientlist.erase(iter);
642 log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
644 clientlist[tempnick] = new userrec();
645 clientlist[tempnick]->fd = socket;
646 strlcpy(clientlist[tempnick]->nick,tempnick.c_str(),NICKMAX-1);
648 /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
649 for (char* temp = (char*)ipaddr; *temp && j < 64; temp++, j++)
650 clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = *temp;
651 clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = 0;
653 clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
654 /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
655 strcpy(clientlist[tempnick]->ident, "unknown");
657 clientlist[tempnick]->registered = 0;
658 clientlist[tempnick]->signon = TIME + Config->dns_timeout;
659 clientlist[tempnick]->lastping = 1;
660 clientlist[tempnick]->ip4 = ip4;
661 clientlist[tempnick]->port = port;
663 // set the registration timeout for this user
664 unsigned long class_regtimeout = 90;
666 long class_threshold = 5;
667 long class_sqmax = 262144; // 256kb
668 long class_rqmax = 4096; // 4k
670 for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
672 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
674 class_regtimeout = (unsigned long)i->registration_timeout;
675 class_flood = i->flood;
676 clientlist[tempnick]->pingmax = i->pingtime;
677 class_threshold = i->threshold;
678 class_sqmax = i->sendqmax;
679 class_rqmax = i->recvqmax;
684 clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
685 clientlist[tempnick]->timeout = TIME+class_regtimeout;
686 clientlist[tempnick]->flood = class_flood;
687 clientlist[tempnick]->threshold = class_threshold;
688 clientlist[tempnick]->sendqmax = class_sqmax;
689 clientlist[tempnick]->recvqmax = class_rqmax;
691 fd_ref_table[socket] = clientlist[tempnick];
692 local_users.push_back(clientlist[tempnick]);
694 if (local_users.size() > Config->SoftLimit)
696 kill_link(clientlist[tempnick],"No more connections allowed");
700 if (local_users.size() >= MAXCLIENTS)
702 kill_link(clientlist[tempnick],"No more connections allowed");
708 * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
709 * its a pretty big but for the moment valid assumption:
710 * file descriptors are handed out starting at 0, and are recycled as theyre freed.
711 * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
712 * irc server at once (or the irc server otherwise initiating this many connections, files etc)
713 * which for the time being is a physical impossibility (even the largest networks dont have more
714 * than about 10,000 users on ONE server!)
716 if ((unsigned)socket >= MAX_DESCRIPTORS)
718 kill_link(clientlist[tempnick],"Server is full");
721 char* e = matches_exception(ipaddr);
724 char* r = matches_zline(ipaddr);
728 snprintf(reason,MAXBUF,"Z-Lined: %s",r);
729 kill_link(clientlist[tempnick],reason);
734 ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
736 WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname...");
739 long FindMatchingGlobal(userrec* user)
742 for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
744 if (a->second->ip4.s_addr == user->ip4.s_addr)
750 long FindMatchingLocal(userrec* user)
753 for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
755 userrec* comp = (userrec*)(*a);
756 if (comp->ip4.s_addr == user->ip4.s_addr)
762 void FullConnectUser(userrec* user, CullList* Goners)
764 ServerInstance->stats->statsConnects++;
765 user->idle_lastmsg = TIME;
766 log(DEBUG,"ConnectUser: %s",user->nick);
768 ConnectClass a = GetClass(user);
770 if (a.type == CC_DENY)
772 Goners->AddItem(user,"Unauthorised connection");
776 if ((*(a.pass.c_str())) && (!user->haspassed))
778 Goners->AddItem(user,"Invalid password");
782 if (FindMatchingLocal(user) > a.maxlocal)
784 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
785 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,(char*)inet_ntoa(user->ip4));
788 else if (FindMatchingGlobal(user) > a.maxglobal)
790 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
791 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,(char*)inet_ntoa(user->ip4));
795 char match_against[MAXBUF];
796 snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
797 char* e = matches_exception(match_against);
801 char* r = matches_gline(match_against);
806 snprintf(reason,MAXBUF,"G-Lined: %s",r);
807 Goners->AddItem(user,reason);
811 r = matches_kline(user->host);
816 snprintf(reason,MAXBUF,"K-Lined: %s",r);
817 Goners->AddItem(user,reason);
823 WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
824 WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
825 WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
826 WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
827 WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
829 // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
830 // so i'd better split it :)
831 std::stringstream out(Config->data005);
832 std::string token = "";
833 std::string line5 = "";
834 int token_counter = 0;
839 line5 = line5 + token + " ";
842 if ((token_counter >= 13) || (out.eof() == true))
844 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
853 * fix 3 by brain, move registered = 7 below these so that spurious modes and host
854 * changes dont go out onto the network and produce 'fake direction'.
856 FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
857 FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
858 user->registered = 7;
859 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));
863 * re-allocates a nick in the user_hash after they change nicknames,
864 * returns a pointer to the new user as it may have moved
866 userrec* ReHashNick(char* Old, char* New)
868 //user_hash::iterator newnick;
869 user_hash::iterator oldnick = clientlist.find(Old);
871 log(DEBUG,"ReHashNick: %s %s",Old,New);
873 if (!strcasecmp(Old,New))
875 log(DEBUG,"old nick is new nick, skipping");
876 return oldnick->second;
879 if (oldnick == clientlist.end())
880 return NULL; /* doesnt exist */
882 log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
884 userrec* olduser = oldnick->second;
885 clientlist[New] = olduser;
886 clientlist.erase(oldnick);
888 log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
890 return clientlist[New];
893 void force_nickchange(userrec* user,const char* newnick)
900 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
904 ServerInstance->stats->statsCollisions++;
905 kill_link(user,"Nickname collision");
909 if (matches_qline(newnick))
911 ServerInstance->stats->statsCollisions++;
912 kill_link(user,"Nickname collision");
920 strlcpy(nick,newnick,MAXBUF-1);
923 if (user->registered == 7)
928 std::string cmd = "NICK";
929 ServerInstance->Parser->CallHandler(cmd,pars,1,user);