+
+void kill_link_silent(userrec *user,const char* r)
+{
+ user_hash::iterator iter = clientlist.find(user->nick);
+
+ char reason[MAXBUF];
+
+ strlcpy(reason,r,MAXBUF);
+
+ if (strlen(reason)>MAXQUIT)
+ {
+ reason[MAXQUIT-1] = '\0';
+ }
+
+ log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
+ Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
+ log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
+
+ user->FlushWriteBuf();
+
+ if (user->registered == 7) {
+ FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
+ WriteCommonExcept(user,"QUIT :%s",reason);
+ }
+
+ FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
+
+ if (user->fd > -1)
+ {
+ if (Config->GetIOHook(user->port))
+ {
+ try
+ {
+ Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
+ }
+ catch (ModuleException& modexcept)
+ {
+ log(DEBUG,"Module exception cought: %s",modexcept.GetReason()); \
+ }
+ }
+ ServerInstance->SE->DelFd(user->fd);
+ user->CloseSocket();
+ }
+
+ if (user->registered == 7) {
+ purge_empty_chans(user);
+ }
+
+ if (iter != clientlist.end())
+ {
+ log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
+ if (user->fd > -1)
+ {
+ fd_ref_table[user->fd] = NULL;
+ if (find(local_users.begin(),local_users.end(),user) != local_users.end())
+ {
+ log(DEBUG,"Delete local user");
+ local_users.erase(find(local_users.begin(),local_users.end(),user));
+ }
+ }
+ clientlist.erase(iter);
+ }
+ delete user;
+}
+
+
+/* adds or updates an entry in the whowas list */
+void AddWhoWas(userrec* u)
+{
+ whowas_hash::iterator iter = whowas.find(u->nick);
+ WhoWasUser *a = new WhoWasUser();
+ strlcpy(a->nick,u->nick,NICKMAX);
+ strlcpy(a->ident,u->ident,IDENTMAX);
+ strlcpy(a->dhost,u->dhost,160);
+ strlcpy(a->host,u->host,160);
+ strlcpy(a->fullname,u->fullname,MAXGECOS);
+ if (u->server)
+ strlcpy(a->server,u->server,256);
+ a->signon = u->signon;
+
+ /* MAX_WHOWAS: max number of /WHOWAS items
+ * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
+ * can be replaced by a newer one
+ */
+
+ if (iter == whowas.end())
+ {
+ if (whowas.size() >= (unsigned)WHOWAS_MAX)
+ {
+ for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
+ {
+ // 3600 seconds in an hour ;)
+ if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
+ {
+ // delete the old one
+ if (i->second) delete i->second;
+ // replace with new one
+ i->second = a;
+ log(DEBUG,"added WHOWAS entry, purged an old record");
+ return;
+ }
+ }
+ // no space left and user doesnt exist. Don't leave ram in use!
+ log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram");
+ delete a;
+ }
+ else
+ {
+ log(DEBUG,"added fresh WHOWAS entry");
+ whowas[a->nick] = a;
+ }
+ }
+ else
+ {
+ log(DEBUG,"updated WHOWAS entry");
+ if (iter->second) delete iter->second;
+ iter->second = a;
+ }
+}
+
+/* add a client connection to the sockets list */
+void AddClient(int socket, int port, bool iscached, in_addr ip4)
+{
+ string tempnick;
+ char tn2[MAXBUF];
+ user_hash::iterator iter;
+
+ tempnick = ConvToStr(socket) + "-unknown";
+ sprintf(tn2,"%d-unknown",socket);
+
+ iter = clientlist.find(tempnick);
+
+ // fix by brain.
+ // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
+ // using one as a registered connection. As theyre per fd, we can also safely assume
+ // that we wont have collisions. Therefore, if the nick exists in the list, its only
+ // used by a dead socket, erase the iterator so that the new client may reclaim it.
+ // this was probably the cause of 'server ignores me when i hammer it with reconnects'
+ // issue in earlier alphas/betas
+ if (iter != clientlist.end())
+ {
+ userrec* goner = iter->second;
+ delete goner;
+ clientlist.erase(iter);
+ }
+
+ /*
+ * It is OK to access the value here this way since we know
+ * it exists, we just created it above.
+ *
+ * At NO other time should you access a value in a map or a
+ * hash_map this way.
+ */
+ clientlist[tempnick] = new userrec();
+
+ char *ipaddr = (char*)inet_ntoa(ip4);
+
+ log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
+
+ clientlist[tempnick]->fd = socket;
+ strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX);
+ /* We don't know the host yet, dns lookup could still be going on,
+ * so instead we just put the ip address here, for now.
+ */
+ strlcpy(clientlist[tempnick]->host, ipaddr, 160);
+ strlcpy(clientlist[tempnick]->dhost, ipaddr, 160);
+ clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
+ strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX);
+ clientlist[tempnick]->registered = 0;
+ clientlist[tempnick]->signon = TIME + Config->dns_timeout;
+ clientlist[tempnick]->lastping = 1;
+ clientlist[tempnick]->ip4 = ip4;
+ clientlist[tempnick]->port = port;
+
+ // set the registration timeout for this user
+ unsigned long class_regtimeout = 90;
+ int class_flood = 0;
+ long class_threshold = 5;
+ long class_sqmax = 262144; // 256kb
+ long class_rqmax = 4096; // 4k
+
+ for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
+ {
+ if (match(ipaddr,i->host.c_str()) && (i->type == CC_ALLOW))
+ {
+ class_regtimeout = (unsigned long)i->registration_timeout;
+ class_flood = i->flood;
+ clientlist[tempnick]->pingmax = i->pingtime;
+ class_threshold = i->threshold;
+ class_sqmax = i->sendqmax;
+ class_rqmax = i->recvqmax;
+ break;
+ }
+ }
+
+ clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
+ clientlist[tempnick]->timeout = TIME+class_regtimeout;
+ clientlist[tempnick]->flood = class_flood;
+ clientlist[tempnick]->threshold = class_threshold;
+ clientlist[tempnick]->sendqmax = class_sqmax;
+ clientlist[tempnick]->recvqmax = class_rqmax;
+
+ ucrec a;
+ a.channel = NULL;
+ a.uc_modes = 0;
+ for (int i = 0; i < MAXCHANS; i++)
+ clientlist[tempnick]->chans.push_back(a);
+
+ if (local_users.size() > Config->SoftLimit)
+ {
+ kill_link(clientlist[tempnick],"No more connections allowed");
+ return;
+ }
+
+ if (local_users.size() >= MAXCLIENTS)
+ {
+ kill_link(clientlist[tempnick],"No more connections allowed");
+ return;
+ }
+
+ // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
+ // its a pretty big but for the moment valid assumption:
+ // file descriptors are handed out starting at 0, and are recycled as theyre freed.
+ // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
+ // irc server at once (or the irc server otherwise initiating this many connections, files etc)
+ // which for the time being is a physical impossibility (even the largest networks dont have more
+ // than about 10,000 users on ONE server!)
+ if ((unsigned)socket > MAX_DESCRIPTORS)
+ {
+ kill_link(clientlist[tempnick],"Server is full");
+ return;
+ }
+ char* e = matches_exception(ipaddr);
+ if (!e)
+ {
+ char* r = matches_zline(ipaddr);
+ if (r)
+ {
+ char reason[MAXBUF];
+ snprintf(reason,MAXBUF,"Z-Lined: %s",r);
+ kill_link(clientlist[tempnick],reason);
+ return;
+ }
+ }
+ fd_ref_table[socket] = clientlist[tempnick];
+ local_users.push_back(clientlist[tempnick]);
+ ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
+
+ WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname...");
+}
+
+long FindMatchingGlobal(userrec* user)
+{
+ long x = 0;
+ for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
+ {
+ if (a->second->ip4.s_addr == user->ip4.s_addr)
+ x++;
+ }
+ return x;
+}
+
+long FindMatchingLocal(userrec* user)
+{
+ long x = 0;
+ for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
+ {
+ userrec* comp = (userrec*)(*a);
+ if (comp->ip4.s_addr == user->ip4.s_addr)
+ x++;
+ }
+ return x;
+}
+
+void FullConnectUser(userrec* user, CullList* Goners)
+{
+ ServerInstance->stats->statsConnects++;
+ user->idle_lastmsg = TIME;
+ log(DEBUG,"ConnectUser: %s",user->nick);
+
+ ConnectClass a = GetClass(user);
+
+ if (a.type == CC_DENY)
+ {
+ Goners->AddItem(user,"Unauthorised connection");
+ return;
+ }
+ if ((*(a.pass.c_str())) && (!user->haspassed))
+ {
+ Goners->AddItem(user,"Invalid password");
+ return;
+ }
+ if (FindMatchingLocal(user) > a.maxlocal)
+ {
+ Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
+ WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,(char*)inet_ntoa(user->ip4));
+ return;
+ }
+ else if (FindMatchingGlobal(user) > a.maxglobal)
+ {
+ Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
+ WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,(char*)inet_ntoa(user->ip4));
+ return;
+ }
+
+ char match_against[MAXBUF];
+ snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
+ char* e = matches_exception(match_against);
+ if (!e)
+ {
+ char* r = matches_gline(match_against);
+ if (r)
+ {
+ char reason[MAXBUF];
+ snprintf(reason,MAXBUF,"G-Lined: %s",r);
+ Goners->AddItem(user,reason);
+ return;
+ }
+ r = matches_kline(user->host);
+ if (r)
+ {
+ char reason[MAXBUF];
+ snprintf(reason,MAXBUF,"K-Lined: %s",r);
+ Goners->AddItem(user,reason);
+ return;
+ }
+ }
+
+
+ WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
+ WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
+ WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
+ WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
+ WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
+ // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
+ // so i'd better split it :)
+ std::stringstream out(Config->data005);
+ std::string token = "";
+ std::string line5 = "";
+ int token_counter = 0;
+ while (!out.eof())
+ {
+ out >> token;
+ line5 = line5 + token + " ";
+ token_counter++;
+ if ((token_counter >= 13) || (out.eof() == true))
+ {
+ WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
+ line5 = "";
+ token_counter = 0;
+ }
+ }
+ ShowMOTD(user);
+
+ // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
+ // onto the network and produce 'fake direction'
+ FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
+ FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
+ user->registered = 7;
+ 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));
+}
+
+/* re-allocates a nick in the user_hash after they change nicknames,
+ * returns a pointer to the new user as it may have moved */
+
+userrec* ReHashNick(char* Old, char* New)
+{
+ //user_hash::iterator newnick;
+ user_hash::iterator oldnick = clientlist.find(Old);
+
+ log(DEBUG,"ReHashNick: %s %s",Old,New);
+
+ if (!strcasecmp(Old,New))
+ {
+ log(DEBUG,"old nick is new nick, skipping");
+ return oldnick->second;
+ }
+
+ if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
+
+ log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
+
+ userrec* olduser = oldnick->second;
+ clientlist[New] = olduser;
+ clientlist.erase(oldnick);
+
+ log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
+
+ return clientlist[New];
+}
+
+void force_nickchange(userrec* user,const char* newnick)
+{
+ char nick[MAXBUF];
+ int MOD_RESULT = 0;
+
+ *nick = 0;
+
+ FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
+ if (MOD_RESULT) {
+ ServerInstance->stats->statsCollisions++;
+ kill_link(user,"Nickname collision");
+ return;
+ }
+ if (matches_qline(newnick))
+ {
+ ServerInstance->stats->statsCollisions++;
+ kill_link(user,"Nickname collision");
+ return;
+ }
+
+ if (user)
+ {
+ if (newnick)
+ {
+ strlcpy(nick,newnick,MAXBUF);
+ }
+ if (user->registered == 7)
+ {
+ char* pars[1];
+ pars[0] = nick;
+ std::string cmd = "NICK";
+ ServerInstance->Parser->CallHandler(cmd,pars,1,user);
+ }
+ }
+}
+