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 * ---------------------------------------------------
17 #include "inspircd_config.h"
18 #include "configreader.h"
20 #include "connection.h"
28 #include "inspstring.h"
30 #include "helperfuncs.h"
32 #include "socketengine.h"
37 #include "cull_list.h"
39 extern InspIRCd* ServerInstance;
40 extern int WHOWAS_STALE;
41 extern int WHOWAS_MAX;
42 extern std::vector<Module*> modules;
43 extern std::vector<ircd_module*> factory;
44 extern std::vector<InspSocket*> module_sockets;
46 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
48 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
49 extern ServerConfig *Config;
50 extern user_hash clientlist;
54 extern std::vector<userrec*> local_users;
56 std::vector<userrec*> all_opers;
58 typedef std::map<irc::string,char*> opertype_t;
59 typedef opertype_t operclass_t;
62 operclass_t operclass;
64 bool InitTypes(const char* tag)
66 for (opertype_t::iterator n = opertypes.begin(); n != opertypes.end(); n++)
76 bool InitClasses(const char* tag)
78 for (operclass_t::iterator n = operclass.begin(); n != operclass.end(); n++)
88 bool DoType(const char* tag, char** entries, void** values, int* types)
90 char* TypeName = (char*)values[0];
91 char* Classes = (char*)values[1];
93 opertypes[TypeName] = strdup(Classes);
94 log(DEBUG,"Read oper TYPE '%s' with classes '%s'",TypeName,Classes);
98 bool DoClass(const char* tag, char** entries, void** values, int* types)
100 char* ClassName = (char*)values[0];
101 char* CommandList = (char*)values[1];
103 operclass[ClassName] = strdup(CommandList);
104 log(DEBUG,"Read oper CLASS '%s' with commands '%s'",ClassName,CommandList);
108 bool DoneClassesAndTypes(const char* tag)
113 bool userrec::ProcessNoticeMasks(const char *sm)
129 if ((*c >= 'A') && (*c <= 'z'))
130 this->SetNoticeMask(*c, adding);
140 bool userrec::IsNoticeMaskSet(unsigned char sm)
142 return (snomasks[sm-65]);
145 void userrec::SetNoticeMask(unsigned char sm, bool value)
147 snomasks[sm-65] = value;
150 const char* userrec::FormatNoticeMasks()
152 static char data[MAXBUF];
155 for (int n = 0; n < 64; n++)
158 data[offset++] = n+65;
167 bool userrec::IsModeSet(unsigned char m)
169 return (modes[m-65]);
172 void userrec::SetMode(unsigned char m, bool value)
177 const char* userrec::FormatModes()
179 static char data[MAXBUF];
181 for (int n = 0; n < 64; n++)
184 data[offset++] = n+65;
192 // the PROPER way to do it, AVOID bzero at *ALL* costs
193 *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
194 server = (char*)FindServerNamePtr(Config->ServerName);
196 lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
197 timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
198 haspassed = dns_done = false;
203 chans.resize(MAXCHANS);
204 memset(modes,0,sizeof(modes));
206 for (unsigned int n = 0; n < MAXCHANS; n++)
208 ucrec* x = new ucrec();
217 for (std::vector<ucrec*>::iterator n = chans.begin(); n != chans.end(); n++)
219 ucrec* x = (ucrec*)*n;
223 if ((IS_LOCAL(this)) && (!dns_done) && (registered >= REG_NICKUSER))
225 pthread_kill(this->dnsthread, SIGTERM);
230 /* XXX - minor point, other *Host functions return a char *, this one creates it. Might be nice to be consistant? */
231 void userrec::MakeHost(char* nhost)
233 /* This is much faster than snprintf */
235 for(char* n = ident; *n; n++)
238 for(char* n = host; *n; n++)
243 void userrec::CloseSocket()
245 shutdown(this->fd,2);
249 char* userrec::GetFullHost()
251 static char result[MAXBUF];
253 for(char* n = nick; *n; n++)
256 for(char* n = ident; *n; n++)
259 for(char* n = dhost; *n; n++)
265 char* userrec::MakeWildHost()
267 static char nresult[MAXBUF];
269 *t++ = '*'; *t++ = '!';
270 *t++ = '*'; *t++ = '@';
271 for(char* n = dhost; *n; n++)
277 int userrec::ReadData(void* buffer, size_t size)
281 return read(this->fd, buffer, size);
288 char* userrec::GetFullRealHost()
290 static char fresult[MAXBUF];
292 for(char* n = nick; *n; n++)
295 for(char* n = ident; *n; n++)
298 for(char* n = host; *n; n++)
304 bool userrec::IsInvited(irc::string &channel)
306 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
308 irc::string compare = i->channel;
310 if (compare == channel)
318 InvitedList* userrec::GetInviteList()
323 void userrec::InviteTo(irc::string &channel)
327 invites.push_back(i);
330 void userrec::RemoveInvite(irc::string &channel)
332 log(DEBUG,"Removing invites");
336 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
338 irc::string compare = i->channel;
340 if (compare == channel)
349 bool userrec::HasPermission(const std::string &command)
356 * users on remote servers can completely bypass all permissions based checks.
357 * This prevents desyncs when one server has different type/class tags to another.
358 * That having been said, this does open things up to the possibility of source changes
359 * allowing remote kills, etc - but if they have access to the src, they most likely have
360 * access to the conf - so it's an end to a means either way.
365 // are they even an oper at all?
368 opertype_t::iterator iter_opertype = opertypes.find(this->oper);
369 if (iter_opertype != opertypes.end())
371 char* Classes = strdup(iter_opertype->second);
372 char* myclass = strtok_r(Classes," ",&savept);
375 operclass_t::iterator iter_operclass = operclass.find(myclass);
376 if (iter_operclass != operclass.end())
378 char* CommandList = strdup(iter_operclass->second);
379 mycmd = strtok_r(CommandList," ",&savept2);
382 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
388 mycmd = strtok_r(NULL," ",&savept2);
392 myclass = strtok_r(NULL," ",&savept);
401 bool userrec::AddBuffer(const std::string &a)
405 /* NB: std::string is arsey about \r and \n and tries to translate them
406 * somehow, so we CANNOT use std::string::find() here :(
408 for (std::string::const_iterator i = a.begin(); i != a.end(); i++)
417 if (recvq.length() > (unsigned)this->recvqmax)
419 this->SetWriteError("RecvQ exceeded");
420 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
427 bool userrec::BufferIsReady()
429 return (recvq.find('\n') != std::string::npos);
432 void userrec::ClearBuffer()
437 std::string userrec::GetBuffer()
442 /* Strip any leading \r or \n off the string.
443 * Usually there are only one or two of these,
444 * so its is computationally cheap to do.
446 while ((*recvq.begin() == '\r') || (*recvq.begin() == '\n'))
447 recvq.erase(recvq.begin());
449 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
451 /* Find the first complete line, return it as the
452 * result, and leave the recvq as whats left
456 std::string ret = std::string(recvq.begin(), x);
457 recvq.erase(recvq.begin(), x + 1);
464 void userrec::AddWriteBuf(const std::string &data)
466 if (*this->GetWriteError())
469 if (sendq.length() + data.length() > (unsigned)this->sendqmax)
472 * Fix by brain - Set the error text BEFORE calling writeopers, because
473 * if we dont it'll recursively call here over and over again trying
474 * to repeatedly add the text to the sendq!
476 this->SetWriteError("SendQ exceeded");
477 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
481 if (data.length() > 512)
483 std::string newdata(data);
485 newdata.append("\r\n");
486 sendq.append(newdata);
494 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
495 void userrec::FlushWriteBuf()
497 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
499 const char* tb = this->sendq.c_str();
500 int n_sent = write(this->fd,tb,this->sendq.length());
504 this->SetWriteError(strerror(errno));
511 // update the user's stats counters
512 this->bytes_out += n_sent;
518 void userrec::SetWriteError(const std::string &error)
520 // don't try to set the error twice, its already set take the first string.
521 if (!this->WriteError.length())
523 log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
524 this->WriteError = error;
528 const char* userrec::GetWriteError()
530 return this->WriteError.c_str();
533 void AddOper(userrec* user)
535 log(DEBUG,"Oper added to optimization list");
536 all_opers.push_back(user);
539 void DeleteOper(userrec* user)
541 for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
545 log(DEBUG,"Oper removed from optimization list");
552 void kill_link(userrec *user,const char* r)
554 user_hash::iterator iter = clientlist.find(user->nick);
557 * I'm pretty sure returning here is causing a desync when part of the net thinks a user is gone,
558 * and another part doesn't. We want to broadcast the quit/kill before bailing so the net stays in sync.
560 * I can't imagine this blowing up, so I'm commenting it out. We still check
561 * before playing with a bad iterator below in our if(). DISCUSS THIS BEFORE YOU DO ANYTHING. --w00t
563 * if (iter == clientlist.end())
569 strlcpy(reason,r,MAXQUIT-1);
570 log(DEBUG,"kill_link: %s %d '%s'",user->nick,user->fd,reason);
573 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
575 if (user->registered == REG_ALL)
577 purge_empty_chans(user);
578 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
579 WriteCommonExcept(user,"QUIT :%s",reason);
583 user->FlushWriteBuf();
585 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
589 if (Config->GetIOHook(user->port))
593 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
595 catch (ModuleException& modexcept)
597 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
601 ServerInstance->SE->DelFd(user->fd);
606 * this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
607 * if they were an oper with +s.
610 * In the current implementation, we only show local quits, as we only show local connects. With
611 * the proposed implmentation of snomasks however, this will likely change in the (near?) future.
613 if (user->registered == REG_ALL)
616 WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
620 if (iter != clientlist.end())
622 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
625 fd_ref_table[user->fd] = NULL;
626 if (find(local_users.begin(),local_users.end(),user) != local_users.end())
628 local_users.erase(find(local_users.begin(),local_users.end(),user));
629 log(DEBUG,"Delete local user");
632 clientlist.erase(iter);
637 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
639 this->host = strdup(user->host);
640 this->dhost = strdup(user->dhost);
641 this->ident = strdup(user->ident);
642 this->server = user->server;
643 this->gecos = strdup(user->fullname);
646 WhoWasGroup::~WhoWasGroup()
658 /* adds or updates an entry in the whowas list */
659 void AddWhoWas(userrec* u)
661 whowas_users::iterator iter = whowas.find(u->nick);
663 if (iter == whowas.end())
665 whowas_set* n = new whowas_set;
666 WhoWasGroup *a = new WhoWasGroup(u);
672 whowas_set* group = (whowas_set*)iter->second;
674 if (group->size() > 10)
676 WhoWasGroup *a = (WhoWasGroup*)*(group->begin());
681 WhoWasGroup *a = new WhoWasGroup(u);
686 /* every hour, run this function which removes all entries over 3 days */
687 void MaintainWhoWas(time_t TIME)
689 for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
691 whowas_set* n = (whowas_set*)iter->second;
694 while ((n->begin() != n->end()) && ((*n->begin())->signon < TIME - 259200)) // 3 days
696 WhoWasGroup *a = *(n->begin());
698 n->erase(n->begin());
704 /* add a client connection to the sockets list */
705 void AddClient(int socket, int port, bool iscached, insp_inaddr ip4)
707 std::string tempnick = ConvToStr(socket) + "-unknown";
708 user_hash::iterator iter = clientlist.find(tempnick);
709 const char *ipaddr = insp_ntoa(ip4);
715 * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
716 * using one as a registered connection. As they are per fd, we can also safely assume
717 * that we wont have collisions. Therefore, if the nick exists in the list, its only
718 * used by a dead socket, erase the iterator so that the new client may reclaim it.
719 * this was probably the cause of 'server ignores me when i hammer it with reconnects'
720 * issue in earlier alphas/betas
722 if (iter != clientlist.end())
724 userrec* goner = iter->second;
726 clientlist.erase(iter);
729 log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
731 _new = new userrec();
732 clientlist[tempnick] = _new;
734 strlcpy(_new->nick,tempnick.c_str(),NICKMAX-1);
736 /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
737 for (const char* temp = ipaddr; *temp && j < 64; temp++, j++)
738 _new->dhost[j] = _new->host[j] = *temp;
739 _new->dhost[j] = _new->host[j] = 0;
741 _new->server = FindServerNamePtr(Config->ServerName);
742 /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
743 strcpy(_new->ident, "unknown");
745 _new->registered = REG_NONE;
746 _new->signon = TIME + Config->dns_timeout;
751 // set the registration timeout for this user
752 unsigned long class_regtimeout = 90;
754 long class_threshold = 5;
755 long class_sqmax = 262144; // 256kb
756 long class_rqmax = 4096; // 4k
758 for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
760 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
762 class_regtimeout = (unsigned long)i->registration_timeout;
763 class_flood = i->flood;
764 _new->pingmax = i->pingtime;
765 class_threshold = i->threshold;
766 class_sqmax = i->sendqmax;
767 class_rqmax = i->recvqmax;
772 _new->nping = TIME + _new->pingmax + Config->dns_timeout;
773 _new->timeout = TIME+class_regtimeout;
774 _new->flood = class_flood;
775 _new->threshold = class_threshold;
776 _new->sendqmax = class_sqmax;
777 _new->recvqmax = class_rqmax;
779 fd_ref_table[socket] = _new;
780 local_users.push_back(_new);
782 if (local_users.size() > Config->SoftLimit)
784 kill_link(_new,"No more connections allowed");
788 if (local_users.size() >= MAXCLIENTS)
790 kill_link(_new,"No more connections allowed");
796 * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
797 * its a pretty big but for the moment valid assumption:
798 * file descriptors are handed out starting at 0, and are recycled as theyre freed.
799 * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
800 * irc server at once (or the irc server otherwise initiating this many connections, files etc)
801 * which for the time being is a physical impossibility (even the largest networks dont have more
802 * than about 10,000 users on ONE server!)
804 if ((unsigned)socket >= MAX_DESCRIPTORS)
806 kill_link(_new,"Server is full");
809 char* e = matches_exception(ipaddr);
812 char* r = matches_zline(ipaddr);
816 snprintf(reason,MAXBUF,"Z-Lined: %s",r);
817 kill_link(_new,reason);
824 ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
827 WriteServ(_new->fd,"NOTICE Auth :*** Looking up your hostname...");
830 long FindMatchingGlobal(userrec* user)
833 for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
836 /* I dont think theres any faster way of matching two ipv6 addresses than memcmp
837 * Let me know if you think of one.
839 if (!memcmp(a->second->ip4.s6_addr, user->ip4.s6_addr, sizeof(in6_addr)))
842 if (a->second->ip4.s_addr == user->ip4.s_addr)
849 long FindMatchingLocal(userrec* user)
852 for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
856 /* I dont think theres any faster way of matching two ipv6 addresses than memcmp */
857 if (!memcmp(comp->ip4.s6_addr, user->ip4.s6_addr, sizeof(in6_addr)))
860 if (comp->ip4.s_addr == user->ip4.s_addr)
867 void FullConnectUser(userrec* user, CullList* Goners)
869 ServerInstance->stats->statsConnects++;
870 user->idle_lastmsg = TIME;
871 log(DEBUG,"ConnectUser: %s",user->nick);
873 ConnectClass a = GetClass(user);
875 if (a.type == CC_DENY)
877 Goners->AddItem(user,"Unauthorised connection");
881 if ((*(a.pass.c_str())) && (!user->haspassed))
883 Goners->AddItem(user,"Invalid password");
887 if (FindMatchingLocal(user) > a.maxlocal)
889 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
890 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,insp_ntoa(user->ip4));
893 else if (FindMatchingGlobal(user) > a.maxglobal)
895 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
896 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,insp_ntoa(user->ip4));
900 char match_against[MAXBUF];
901 snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
902 char* e = matches_exception(match_against);
906 char* r = matches_gline(match_against);
911 snprintf(reason,MAXBUF,"G-Lined: %s",r);
912 Goners->AddItem(user,reason);
916 r = matches_kline(match_against);
921 snprintf(reason,MAXBUF,"K-Lined: %s",r);
922 Goners->AddItem(user,reason);
928 WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
929 WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
930 WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
931 WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
932 WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
934 // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
935 // so i'd better split it :)
936 std::stringstream out(Config->data005);
937 std::string token = "";
938 std::string line5 = "";
939 int token_counter = 0;
944 line5 = line5 + token + " ";
947 if ((token_counter >= 13) || (out.eof() == true))
949 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
958 * fix 3 by brain, move registered = 7 below these so that spurious modes and host
959 * changes dont go out onto the network and produce 'fake direction'.
961 FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
962 FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
963 user->registered = REG_ALL;
964 WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,insp_ntoa(user->ip4));
968 * re-allocates a nick in the user_hash after they change nicknames,
969 * returns a pointer to the new user as it may have moved
971 userrec* ReHashNick(const char* Old, const char* New)
973 //user_hash::iterator newnick;
974 user_hash::iterator oldnick = clientlist.find(Old);
976 log(DEBUG,"ReHashNick: %s %s",Old,New);
978 if (!strcasecmp(Old,New))
980 log(DEBUG,"old nick is new nick, skipping");
981 return oldnick->second;
984 if (oldnick == clientlist.end())
985 return NULL; /* doesnt exist */
987 log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
989 userrec* olduser = oldnick->second;
990 clientlist[New] = olduser;
991 clientlist.erase(oldnick);
993 log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
995 return clientlist[New];
998 void force_nickchange(userrec* user,const char* newnick)
1005 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
1009 ServerInstance->stats->statsCollisions++;
1010 kill_link(user,"Nickname collision");
1014 if (matches_qline(newnick))
1016 ServerInstance->stats->statsCollisions++;
1017 kill_link(user,"Nickname collision");
1025 strlcpy(nick,newnick,MAXBUF-1);
1028 if (user->registered == REG_ALL)
1030 const char* pars[1];
1032 std::string cmd = "NICK";
1034 ServerInstance->Parser->CallHandler(cmd,pars,1,user);