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 u-lined servers can completely bypass
205 // all permissions based checks.
207 // of course, if this is sent to a remote server and this
208 // server is not ulined there, then that other server
209 // silently drops the command.
210 if (is_uline(this->server))
213 // are they even an oper at all?
214 if (strchr(this->modes,'o'))
216 for (int j =0; j < Config->ConfValueEnum("type",&Config->config_f); j++)
218 Config->ConfValue("type","name",j,TypeName,&Config->config_f);
219 if (!strcmp(TypeName,this->oper))
221 Config->ConfValue("type","classes",j,Classes,&Config->config_f);
222 char* myclass = strtok_r(Classes," ",&savept);
225 for (int k =0; k < Config->ConfValueEnum("class",&Config->config_f); k++)
227 Config->ConfValue("class","name",k,ClassName,&Config->config_f);
228 if (!strcmp(ClassName,myclass))
230 Config->ConfValue("class","commands",k,CommandList,&Config->config_f);
231 mycmd = strtok_r(CommandList," ",&savept2);
234 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
238 mycmd = strtok_r(NULL," ",&savept2);
242 myclass = strtok_r(NULL," ",&savept);
251 bool userrec::AddBuffer(std::string a)
254 for (unsigned int i = 0; i < a.length(); i++)
255 if ((a[i] != '\r') && (a[i] != '\0') && (a[i] != 7))
257 std::stringstream stream(recvq);
259 recvq = stream.str();
261 // count the size of the first line in the buffer.
262 while (i < recvq.length())
264 if (recvq[i++] == '\n')
267 if (recvq.length() > (unsigned)this->recvqmax)
269 this->SetWriteError("RecvQ exceeded");
270 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
272 // return false if we've had more than 600 characters WITHOUT
273 // a carriage return (this is BAD, drop the socket)
277 bool userrec::BufferIsReady()
279 for (unsigned int i = 0; i < recvq.length(); i++)
280 if (recvq[i] == '\n')
285 void userrec::ClearBuffer()
290 std::string userrec::GetBuffer()
294 char* line = (char*)recvq.c_str();
295 std::string ret = "";
296 while ((*line != '\n') && (strlen(line)))
301 if ((*line == '\n') || (*line == '\r'))
307 void userrec::AddWriteBuf(std::string data)
309 if (this->GetWriteError() != "")
311 if (sendq.length() + data.length() > (unsigned)this->sendqmax)
313 /* Fix by brain - Set the error text BEFORE calling writeopers, because
314 * if we dont it'll recursively call here over and over again trying
315 * to repeatedly add the text to the sendq!
317 this->SetWriteError("SendQ exceeded");
318 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
321 std::stringstream stream;
322 stream << sendq << data;
323 sendq = stream.str();
326 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
327 void userrec::FlushWriteBuf()
329 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
331 char* tb = (char*)this->sendq.c_str();
332 int n_sent = write(this->fd,tb,this->sendq.length());
335 this->SetWriteError(strerror(errno));
342 // update the user's stats counters
343 this->bytes_out += n_sent;
349 void userrec::SetWriteError(std::string error)
351 log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
352 // don't try to set the error twice, its already set take the first string.
353 if (this->WriteError == "")
354 this->WriteError = error;
357 std::string userrec::GetWriteError()
359 return this->WriteError;
362 void AddOper(userrec* user)
364 log(DEBUG,"Oper added to optimization list");
365 all_opers.push_back(user);
368 void DeleteOper(userrec* user)
370 for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
374 log(DEBUG,"Oper removed from optimization list");
381 void kill_link(userrec *user,const char* r)
383 user_hash::iterator iter = clientlist.find(user->nick);
387 strlcpy(reason,r,MAXBUF);
389 if (strlen(reason)>MAXQUIT)
391 reason[MAXQUIT-1] = '\0';
394 log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
395 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
396 log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
398 if (user->registered == 7) {
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))
411 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
413 ServerInstance->SE->DelFd(user->fd);
417 // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
418 // if they were an oper with +s.
419 if (user->registered == 7) {
420 purge_empty_chans(user);
421 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
423 WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
427 if (iter != clientlist.end())
429 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
432 fd_ref_table[user->fd] = NULL;
433 if (find(local_users.begin(),local_users.end(),user) != local_users.end())
435 local_users.erase(find(local_users.begin(),local_users.end(),user));
436 log(DEBUG,"Delete local user");
439 clientlist.erase(iter);
444 void kill_link_silent(userrec *user,const char* r)
446 user_hash::iterator iter = clientlist.find(user->nick);
450 strlcpy(reason,r,MAXBUF);
452 if (strlen(reason)>MAXQUIT)
454 reason[MAXQUIT-1] = '\0';
457 log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
458 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
459 log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
461 user->FlushWriteBuf();
463 if (user->registered == 7) {
464 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
465 WriteCommonExcept(user,"QUIT :%s",reason);
468 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
472 if (Config->GetIOHook(user->port))
474 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
476 ServerInstance->SE->DelFd(user->fd);
480 if (user->registered == 7) {
481 purge_empty_chans(user);
484 if (iter != clientlist.end())
486 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
489 fd_ref_table[user->fd] = NULL;
490 if (find(local_users.begin(),local_users.end(),user) != local_users.end())
492 log(DEBUG,"Delete local user");
493 local_users.erase(find(local_users.begin(),local_users.end(),user));
496 clientlist.erase(iter);
502 /* adds or updates an entry in the whowas list */
503 void AddWhoWas(userrec* u)
505 whowas_hash::iterator iter = whowas.find(u->nick);
506 WhoWasUser *a = new WhoWasUser();
507 strlcpy(a->nick,u->nick,NICKMAX);
508 strlcpy(a->ident,u->ident,IDENTMAX);
509 strlcpy(a->dhost,u->dhost,160);
510 strlcpy(a->host,u->host,160);
511 strlcpy(a->fullname,u->fullname,MAXGECOS);
513 strlcpy(a->server,u->server,256);
514 a->signon = u->signon;
516 /* MAX_WHOWAS: max number of /WHOWAS items
517 * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
518 * can be replaced by a newer one
521 if (iter == whowas.end())
523 if (whowas.size() >= (unsigned)WHOWAS_MAX)
525 for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
527 // 3600 seconds in an hour ;)
528 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
530 // delete the old one
531 if (i->second) delete i->second;
532 // replace with new one
534 log(DEBUG,"added WHOWAS entry, purged an old record");
538 // no space left and user doesnt exist. Don't leave ram in use!
539 log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram");
544 log(DEBUG,"added fresh WHOWAS entry");
550 log(DEBUG,"updated WHOWAS entry");
551 if (iter->second) delete iter->second;
556 /* add a client connection to the sockets list */
557 void AddClient(int socket, int port, bool iscached, in_addr ip4)
561 user_hash::iterator iter;
563 tempnick = ConvToStr(socket) + "-unknown";
564 sprintf(tn2,"%d-unknown",socket);
566 iter = clientlist.find(tempnick);
569 // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
570 // using one as a registered connection. As theyre per fd, we can also safely assume
571 // that we wont have collisions. Therefore, if the nick exists in the list, its only
572 // used by a dead socket, erase the iterator so that the new client may reclaim it.
573 // this was probably the cause of 'server ignores me when i hammer it with reconnects'
574 // issue in earlier alphas/betas
575 if (iter != clientlist.end())
577 userrec* goner = iter->second;
579 clientlist.erase(iter);
583 * It is OK to access the value here this way since we know
584 * it exists, we just created it above.
586 * At NO other time should you access a value in a map or a
589 clientlist[tempnick] = new userrec();
591 char *ipaddr = (char*)inet_ntoa(ip4);
593 log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
595 clientlist[tempnick]->fd = socket;
596 strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX);
597 /* We don't know the host yet, dns lookup could still be going on,
598 * so instead we just put the ip address here, for now.
600 strlcpy(clientlist[tempnick]->host, ipaddr, 160);
601 strlcpy(clientlist[tempnick]->dhost, ipaddr, 160);
602 clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
603 strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX);
604 clientlist[tempnick]->registered = 0;
605 clientlist[tempnick]->signon = TIME + Config->dns_timeout;
606 clientlist[tempnick]->lastping = 1;
607 clientlist[tempnick]->ip4 = ip4;
608 clientlist[tempnick]->port = port;
610 // set the registration timeout for this user
611 unsigned long class_regtimeout = 90;
613 long class_threshold = 5;
614 long class_sqmax = 262144; // 256kb
615 long class_rqmax = 4096; // 4k
617 for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
619 if (match(ipaddr,i->host.c_str()) && (i->type == CC_ALLOW))
621 class_regtimeout = (unsigned long)i->registration_timeout;
622 class_flood = i->flood;
623 clientlist[tempnick]->pingmax = i->pingtime;
624 class_threshold = i->threshold;
625 class_sqmax = i->sendqmax;
626 class_rqmax = i->recvqmax;
631 clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
632 clientlist[tempnick]->timeout = TIME+class_regtimeout;
633 clientlist[tempnick]->flood = class_flood;
634 clientlist[tempnick]->threshold = class_threshold;
635 clientlist[tempnick]->sendqmax = class_sqmax;
636 clientlist[tempnick]->recvqmax = class_rqmax;
641 for (int i = 0; i < MAXCHANS; i++)
642 clientlist[tempnick]->chans.push_back(a);
644 if (local_users.size() > Config->SoftLimit)
646 kill_link(clientlist[tempnick],"No more connections allowed");
650 if (local_users.size() >= MAXCLIENTS)
652 kill_link(clientlist[tempnick],"No more connections allowed");
656 // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
657 // its a pretty big but for the moment valid assumption:
658 // file descriptors are handed out starting at 0, and are recycled as theyre freed.
659 // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
660 // irc server at once (or the irc server otherwise initiating this many connections, files etc)
661 // which for the time being is a physical impossibility (even the largest networks dont have more
662 // than about 10,000 users on ONE server!)
663 if ((unsigned)socket > MAX_DESCRIPTORS)
665 kill_link(clientlist[tempnick],"Server is full");
668 char* e = matches_exception(ipaddr);
671 char* r = matches_zline(ipaddr);
675 snprintf(reason,MAXBUF,"Z-Lined: %s",r);
676 kill_link(clientlist[tempnick],reason);
680 fd_ref_table[socket] = clientlist[tempnick];
681 local_users.push_back(clientlist[tempnick]);
682 ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
684 WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname...");
687 long FindMatchingGlobal(userrec* user)
690 for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
692 if (a->second->ip4.s_addr == user->ip4.s_addr)
698 long FindMatchingLocal(userrec* user)
701 for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
703 userrec* comp = (userrec*)(*a);
704 if (comp->ip4.s_addr == user->ip4.s_addr)
710 void FullConnectUser(userrec* user, CullList* Goners)
712 ServerInstance->stats->statsConnects++;
713 user->idle_lastmsg = TIME;
714 log(DEBUG,"ConnectUser: %s",user->nick);
716 ConnectClass a = GetClass(user);
718 if (a.type == CC_DENY)
720 Goners->AddItem(user,"Unauthorised connection");
723 if ((*(a.pass.c_str())) && (!user->haspassed))
725 Goners->AddItem(user,"Invalid password");
728 if (FindMatchingLocal(user) > a.maxlocal)
730 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
731 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,(char*)inet_ntoa(user->ip4));
734 else if (FindMatchingGlobal(user) > a.maxglobal)
736 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
737 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,(char*)inet_ntoa(user->ip4));
741 char match_against[MAXBUF];
742 snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
743 char* e = matches_exception(match_against);
746 char* r = matches_gline(match_against);
750 snprintf(reason,MAXBUF,"G-Lined: %s",r);
751 Goners->AddItem(user,reason);
754 r = matches_kline(user->host);
758 snprintf(reason,MAXBUF,"K-Lined: %s",r);
759 Goners->AddItem(user,reason);
765 WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
766 WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
767 WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
768 WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
769 WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
770 // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
771 // so i'd better split it :)
772 std::stringstream out(Config->data005);
773 std::string token = "";
774 std::string line5 = "";
775 int token_counter = 0;
779 line5 = line5 + token + " ";
781 if ((token_counter >= 13) || (out.eof() == true))
783 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
790 // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
791 // onto the network and produce 'fake direction'
792 FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
793 FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
794 user->registered = 7;
795 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));
798 /* re-allocates a nick in the user_hash after they change nicknames,
799 * returns a pointer to the new user as it may have moved */
801 userrec* ReHashNick(char* Old, char* New)
803 //user_hash::iterator newnick;
804 user_hash::iterator oldnick = clientlist.find(Old);
806 log(DEBUG,"ReHashNick: %s %s",Old,New);
808 if (!strcasecmp(Old,New))
810 log(DEBUG,"old nick is new nick, skipping");
811 return oldnick->second;
814 if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
816 log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
818 userrec* olduser = oldnick->second;
819 clientlist[New] = olduser;
820 clientlist.erase(oldnick);
822 log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
824 return clientlist[New];
827 void force_nickchange(userrec* user,const char* newnick)
834 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
836 ServerInstance->stats->statsCollisions++;
837 kill_link(user,"Nickname collision");
840 if (matches_qline(newnick))
842 ServerInstance->stats->statsCollisions++;
843 kill_link(user,"Nickname collision");
851 strlcpy(nick,newnick,MAXBUF);
853 if (user->registered == 7)
857 std::string cmd = "NICK";
858 ServerInstance->Parser->CallHandler(cmd,pars,1,user);