]> git.netwichtig.de Git - user/henk/code/inspircd.git/blobdiff - src/users.cpp
Logging
[user/henk/code/inspircd.git] / src / users.cpp
index 493cbbade5d893584a17dd3b163b15b451b7bafd..c7f74da0b95b0ac8f2ee0cd374778984adc5a23a 100644 (file)
@@ -2,7 +2,7 @@
  *       | Inspire Internet Relay Chat Daemon |
  *       +------------------------------------+
  *
- *  Inspire is copyright (C) 2002-2004 ChatSpike-Dev.
+ *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
  *                       E-mail:
  *                <brain@chatspike.net>
  *               <Craig@chatspike.net>
@@ -18,64 +18,178 @@ using namespace std;
 
 #include "inspircd_config.h" 
 #include "channels.h"
+#include "connection.h"
 #include "users.h"
 #include "inspircd.h"
 #include <stdio.h>
+#ifdef THREADED_DNS
+#include <pthread.h>
+#include <signal.h>
+#endif
 #include "inspstring.h"
+#include "commands.h"
 #include "helperfuncs.h"
+#include "typedefs.h"
+#include "socketengine.h"
+#include "hashcomp.h"
+#include "message.h"
+#include "wildcard.h"
+#include "xline.h"
+#include "cull_list.h"
 
-extern std::stringstream config_f;
-
+extern InspIRCd* ServerInstance;
+extern int WHOWAS_STALE;
+extern int WHOWAS_MAX;
+extern std::vector<Module*> modules;
+extern std::vector<ircd_module*> factory;
+extern std::vector<InspSocket*> module_sockets;
+extern int MODCOUNT;
+extern InspSocket* socket_ref[MAX_DESCRIPTORS];
 extern time_t TIME;
+extern userrec* fd_ref_table[MAX_DESCRIPTORS];
+extern ServerConfig *Config;
+extern user_hash clientlist;
+
+whowas_users whowas;
+
+extern std::vector<userrec*> local_users;
+
+std::vector<userrec*> all_opers;
+
+typedef std::map<irc::string,char*> opertype_t;
+typedef opertype_t operclass_t;
+
+opertype_t opertypes;
+operclass_t operclass;
+
+bool InitTypes(const char* tag)
+{
+       for (opertype_t::iterator n = opertypes.begin(); n != opertypes.end(); n++)
+       {
+               if (n->second)
+                       delete[] n->second;
+       }
+       opertypes.clear();
+       return true;
+}
+
+bool InitClasses(const char* tag)
+{
+       for (operclass_t::iterator n = operclass.begin(); n != operclass.end(); n++)
+       {
+               if (n->second)
+                       delete[] n->second;
+       }
+       operclass.clear();
+       return true;
+}
+
+bool DoType(const char* tag, char** entries, void** values, int* types)
+{
+       char* TypeName = (char*)values[0];
+       char* Classes = (char*)values[1];
+       opertypes[TypeName] = strdup(Classes);
+       log(DEBUG,"Read oper TYPE '%s' with classes '%s'",TypeName,Classes);
+       return true;
+}
+
+bool DoClass(const char* tag, char** entries, void** values, int* types)
+{
+       char* ClassName = (char*)values[0];
+       char* CommandList = (char*)values[1];
+       operclass[ClassName] = strdup(CommandList);
+       log(DEBUG,"Read oper CLASS '%s' with commands '%s'",ClassName,CommandList);
+       return true;
+}
+
+bool DoneClassesAndTypes(const char* tag)
+{
+       return true;
+}
 
 userrec::userrec()
 {
        // the PROPER way to do it, AVOID bzero at *ALL* costs
-       strcpy(nick,"");
-       strcpy(ip,"127.0.0.1");
-       timeout = 0;
-       strcpy(ident,"");
-       strcpy(host,"");
-       strcpy(dhost,"");
-       strcpy(fullname,"");
-       strcpy(modes,"");
-       strcpy(server,"");
-       strcpy(awaymsg,"");
-       strcpy(oper,"");
+       *password = *nick = *ident = *host = *dhost = *fullname = *modes = *awaymsg = *oper = 0;
+       server = (char*)FindServerNamePtr(Config->ServerName);
        reset_due = TIME;
-       lines_in = 0;
-       fd = lastping = signon = idle_lastmsg = nping = registered = 0;
-       flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
-       haspassed = false;
-       dns_done = false;
+       lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
+       modebits = timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
+       haspassed = dns_done = false;
        recvq = "";
        sendq = "";
-       strcpy(result,"");
-       for (int i = 0; i < MAXCHANS; i++)
+       chans.clear();
+       invites.clear();
+        chans.resize(MAXCHANS);
+        for (unsigned int n = 0; n < MAXCHANS; n++)
+        {
+               ucrec* x = new ucrec();
+               chans[n] = x;
+               x->channel = NULL;
+               x->uc_modes = 0;
+        }
+}
+
+userrec::~userrec()
+{
+       for (std::vector<ucrec*>::iterator n = chans.begin(); n != chans.end(); n++)
        {
-               this->chans[i].channel = NULL;
-               this->chans[i].uc_modes = 0;
+               ucrec* x = (ucrec*)*n;
+               delete x;
        }
-       invites.clear();
+}
+
+void userrec::MakeHost(char* nhost)
+{
+       /* This is much faster than snprintf */
+       char* t = nhost;
+       for(char* n = ident; *n; n++)
+               *t++ = *n;
+       *t++ = '@';
+       for(char* n = host; *n; n++)
+               *t++ = *n;
+       *t = 0;
 }
 
 void userrec::CloseSocket()
 {
-       shutdown(this->fd);
+       shutdown(this->fd,2);
        close(this->fd);
 }
  
 char* userrec::GetFullHost()
 {
-       snprintf(result,MAXBUF,"%s!%s@%s",nick,ident,dhost);
+       static char result[MAXBUF];
+       char* t = result;
+       for(char* n = nick; *n; n++)
+               *t++ = *n;
+       *t++ = '!';
+       for(char* n = ident; *n; n++)
+               *t++ = *n;
+       *t++ = '@';
+       for(char* n = dhost; *n; n++)
+               *t++ = *n;
+       *t = 0;
        return result;
 }
 
+char* userrec::MakeWildHost()
+{
+       static char nresult[MAXBUF];
+       char* t = nresult;
+       *t++ = '*';     *t++ = '!';
+       *t++ = '*';     *t++ = '@';
+       for(char* n = dhost; *n; n++)
+               *t++ = *n;
+       *t = 0;
+       return nresult;
+}
+
 int userrec::ReadData(void* buffer, size_t size)
 {
        if (this->fd > -1)
        {
-               return read(this->fd, buffer, size)
+               return read(this->fd, buffer, size);
        }
        else return 0;
 }
@@ -83,19 +197,28 @@ int userrec::ReadData(void* buffer, size_t size)
 
 char* userrec::GetFullRealHost()
 {
-       snprintf(result,MAXBUF,"%s!%s@%s",nick,ident,host);
-       return result;
+       static char fresult[MAXBUF];
+       char* t = fresult;
+       for(char* n = nick; *n; n++)
+               *t++ = *n;
+       *t++ = '!';
+       for(char* n = ident; *n; n++)
+               *t++ = *n;
+       *t++ = '@';
+       for(char* n = host; *n; n++)
+               *t++ = *n;
+       *t = 0;
+       return fresult;
 }
 
-bool userrec::IsInvited(char* channel)
+bool userrec::IsInvited(irc::string &channel)
 {
        for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
        {
-               if (i->channel) {
-                       if (!strcasecmp(i->channel,channel))
-                       {
-                               return true;
-                       }
+               irc::string compare = i->channel;
+               if (compare == channel)
+               {
+                       return true;
                }
        }
        return false;
@@ -106,104 +229,99 @@ InvitedList* userrec::GetInviteList()
        return &invites;
 }
 
-void userrec::InviteTo(char* channel)
+void userrec::InviteTo(irc::string &channel)
 {
        Invited i;
-       strlcpy(i.channel,channel,CHANMAX);
+       i.channel = channel;
        invites.push_back(i);
 }
 
-void userrec::RemoveInvite(char* channel)
+void userrec::RemoveInvite(irc::string &channel)
 {
        log(DEBUG,"Removing invites");
-       if (channel)
+       if (invites.size())
        {
-               if (invites.size())
+               for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
                {
-                       for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
-                       {
-                               if (i->channel)
-                               {
-                                       if (!strcasecmp(i->channel,channel))
-                                       {
-                                               invites.erase(i);
-                                               return;
-                                       }
-                               }
-                       }
-               }
-        }
+                       irc::string compare = i->channel;
+                       if (compare == channel)
+                       {
+                               invites.erase(i);
+                               return;
+                               }
+                       }
+               }
 }
 
-bool userrec::HasPermission(char* command)
+bool userrec::HasPermission(const std::string &command)
 {
-       char TypeName[MAXBUF],Classes[MAXBUF],ClassName[MAXBUF],CommandList[MAXBUF];
        char* mycmd;
        char* savept;
        char* savept2;
        
+       // users on remote servers can completely bypass
+       // all permissions based checks.
+       // This prevents desyncs when one server has different
+       // type/class tags to another.
+       if (!IS_LOCAL(this))
+               return true;
+       
        // are they even an oper at all?
-       if (strchr(this->modes,'o'))
+       if (*this->oper)
        {
-               log(DEBUG,"*** HasPermission: %s is an oper",this->nick);
-               for (int j =0; j < ConfValueEnum("type",&config_f); j++)
+               opertype_t::iterator iter_opertype = opertypes.find(this->oper);
+               if (iter_opertype != opertypes.end())
                {
-                       ConfValue("type","name",j,TypeName,&config_f);
-                       if (!strcmp(TypeName,this->oper))
+                       char* Classes = strdup(iter_opertype->second);
+                       char* myclass = strtok_r(Classes," ",&savept);
+                       while (myclass)
                        {
-                               log(DEBUG,"*** HasPermission: %s is an oper of type '%s'",this->nick,this->oper);
-                               ConfValue("type","classes",j,Classes,&config_f);
-                               char* myclass = strtok_r(Classes," ",&savept);
-                               while (myclass)
+                               operclass_t::iterator iter_operclass = operclass.find(myclass);
+                               if (iter_operclass != operclass.end())
                                {
-                                       log(DEBUG,"*** HasPermission: checking classtype '%s'",myclass);
-                                       for (int k =0; k < ConfValueEnum("class",&config_f); k++)
+                                       char* CommandList = strdup(iter_operclass->second);
+                                       mycmd = strtok_r(CommandList," ",&savept2);
+                                       while (mycmd)
                                        {
-                                               ConfValue("class","name",k,ClassName,&config_f);
-                                               if (!strcmp(ClassName,myclass))
+                                               if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
                                                {
-                                                       ConfValue("class","commands",k,CommandList,&config_f);
-                                                       log(DEBUG,"*** HasPermission: found class named %s with commands: '%s'",ClassName,CommandList);
-                                                       
-                                                       
-                                                       mycmd = strtok_r(CommandList," ",&savept2);
-                                                       while (mycmd)
-                                                       {
-                                                               if (!strcasecmp(mycmd,command))
-                                                               {
-                                                                       log(DEBUG,"*** Command %s found, returning true",command);
-                                                                       return true;
-                                                               }
-                                                               mycmd = strtok_r(NULL," ",&savept2);
-                                                       }
+                                                       free(Classes);
+                                                       free(CommandList);
+                                                       return true;
                                                }
+                                               mycmd = strtok_r(NULL," ",&savept2);
                                        }
-                                       myclass = strtok_r(NULL," ",&savept);
+                                       free(CommandList);
                                }
+                               myclass = strtok_r(NULL," ",&savept);
                        }
+                       free(Classes);
                }
        }
        return false;
 }
 
 
-bool userrec::AddBuffer(std::string a)
+bool userrec::AddBuffer(const std::string &a)
 {
         std::string b = "";
-        for (int i = 0; i < a.length(); i++)
-                if ((a[i] != '\r') && (a[i] != '\0') && (a[i] != 7))
-                        b = b + a[i];
+       char* n = (char*)a.c_str();
+        for (char* i = n; *i; i++)
+       {
+                if ((*i != '\r') && (*i != '\0') && (*i != 7))
+                        b = b + *i;
+       }
         std::stringstream stream(recvq);
         stream << b;
         recvq = stream.str();
-       int i = 0;
+       unsigned int i = 0;
        // count the size of the first line in the buffer.
        while (i < recvq.length())
        {
                if (recvq[i++] == '\n')
                        break;
        }
-       if (recvq.length() > this->recvqmax)
+       if (recvq.length() > (unsigned)this->recvqmax)
        {
                this->SetWriteError("RecvQ exceeded");
                WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
@@ -215,7 +333,8 @@ bool userrec::AddBuffer(std::string a)
 
 bool userrec::BufferIsReady()
 {
-        for (int i = 0; i < recvq.length(); i++)
+       unsigned int t = recvq.length();
+        for (unsigned int i = 0; i < t; i++)
                if (recvq[i] == '\n')
                        return true;
         return false;
@@ -232,7 +351,7 @@ std::string userrec::GetBuffer()
                return "";
         char* line = (char*)recvq.c_str();
         std::string ret = "";
-        while ((*line != '\n') && (strlen(line)))
+        while ((*line != '\n') && (*line))
         {
                 ret = ret + *line;
                 line++;
@@ -243,14 +362,18 @@ std::string userrec::GetBuffer()
         return ret;
 }
 
-void userrec::AddWriteBuf(std::string data)
+void userrec::AddWriteBuf(const std::string &data)
 {
-       if (this->GetWriteError() != "")
+       if (*this->GetWriteError())
                return;
-       if (sendq.length() + data.length() > this->sendqmax)
+       if (sendq.length() + data.length() > (unsigned)this->sendqmax)
        {
-               WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
+               /* Fix by brain - Set the error text BEFORE calling writeopers, because
+                * if we dont it'll recursively  call here over and over again trying
+                * to repeatedly add the text to the sendq!
+                */
                this->SetWriteError("SendQ exceeded");
+               WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
                return;
        }
         std::stringstream stream;
@@ -261,7 +384,7 @@ void userrec::AddWriteBuf(std::string data)
 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 void userrec::FlushWriteBuf()
 {
-       if (sendq.length())
+       if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
        {
                char* tb = (char*)this->sendq.c_str();
                int n_sent = write(this->fd,tb,this->sendq.length());
@@ -281,7 +404,7 @@ void userrec::FlushWriteBuf()
        }
 }
 
-void userrec::SetWriteError(std::string error)
+void userrec::SetWriteError(const std::string &error)
 {
        log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
        // don't try to set the error twice, its already set take the first string.
@@ -289,7 +412,447 @@ void userrec::SetWriteError(std::string error)
                this->WriteError = error;
 }
 
-std::string userrec::GetWriteError()
+const char* userrec::GetWriteError()
+{
+       return this->WriteError.c_str();
+}
+
+void AddOper(userrec* user)
+{
+        log(DEBUG,"Oper added to optimization list");
+        all_opers.push_back(user);
+}
+
+void DeleteOper(userrec* user)
+{
+        for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
+        {
+                if (*a == user)
+                {
+                        log(DEBUG,"Oper removed from optimization list");
+                        all_opers.erase(a);
+                        return;
+                }
+        }
+}
+
+void kill_link(userrec *user,const char* r)
+{
+        user_hash::iterator iter = clientlist.find(user->nick);
+
+        char reason[MAXBUF];
+
+        strlcpy(reason,r,MAXQUIT-1);
+
+        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 %d",user->fd);
+
+        if (user->registered == 7) {
+               purge_empty_chans(user);
+                FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
+                WriteCommonExcept(user,"QUIT :%s",reason);
+        }
+
+        user->FlushWriteBuf();
+
+        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();
+        }
+
+        // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
+        // if they were an oper with +s.
+        if (user->registered == 7) {
+                // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
+                if (user->fd > -1)
+                        WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
+                AddWhoWas(user);
+        }
+
+        if (iter != clientlist.end())
+        {
+                log(DEBUG,"deleting user hash value %lx",(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())
+                       {
+                               local_users.erase(find(local_users.begin(),local_users.end(),user));
+                               log(DEBUG,"Delete local user");
+                       }
+               }
+                clientlist.erase(iter);
+        }
+        delete user;
+}
+
+WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
+{
+       this->host = strdup(user->host);
+       this->dhost = strdup(user->dhost);
+       this->ident = strdup(user->ident);
+       this->server = user->server;
+       this->gecos = strdup(user->fullname);
+}
+
+WhoWasGroup::~WhoWasGroup()
+{
+       if (host)
+               free(host);
+       if (dhost)
+               free(dhost);
+       if (ident)
+               free(ident);
+       if (gecos)
+               free(gecos);
+}
+
+/* adds or updates an entry in the whowas list */
+void AddWhoWas(userrec* u)
 {
-       return this->WriteError;
+        whowas_users::iterator iter = whowas.find(u->nick);
+       if (iter == whowas.end())
+       {
+               whowas_set* n = new whowas_set;
+               WhoWasGroup *a = new WhoWasGroup(u);
+               n->push_back(a);
+               whowas[u->nick] = n;
+       }
+       else
+       {
+               whowas_set* group = (whowas_set*)iter->second;
+               if (group->size() > 10)
+               {
+                       WhoWasGroup *a = (WhoWasGroup*)*(group->begin());
+                       delete a;
+                       group->pop_front();
+               }
+               WhoWasGroup *a = new WhoWasGroup(u);
+               group->push_back(a);
+       }
+}
+
+/* every hour, run this function which removes all entries over 3 days */
+void MaintainWhoWas(time_t TIME)
+{
+       for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
+       {
+               whowas_set* n = (whowas_set*)iter->second;
+               if (n->size())
+               {
+                       while ((n->begin() != n->end()) && ((*n->begin())->signon < TIME - 259200)) // 3 days
+                       {
+                               WhoWasGroup *a = *(n->begin());
+                               delete a;
+                               n->erase(n->begin());
+                       }
+               }
+       }
+}
+
+/* add a client connection to the sockets list */
+void AddClient(int socket, int port, bool iscached, in_addr ip4)
+{
+       std::string tempnick = ConvToStr(socket) + "-unknown";
+       user_hash::iterator iter = clientlist.find(tempnick);
+       const char *ipaddr = inet_ntoa(ip4);
+       int j = 0;
+
+        // 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);
+        }
+
+       log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
+       
+        clientlist[tempnick] = new userrec();
+        clientlist[tempnick]->fd = socket;
+        strlcpy(clientlist[tempnick]->nick,tempnick.c_str(),NICKMAX-1);
+
+       /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
+       for (char* temp = (char*)ipaddr; *temp && j < 64; temp++, j++)
+               clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = *temp;
+       clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = 0;
+
+        clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
+       /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
+        strcpy(clientlist[tempnick]->ident, "unknown");
+
+        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 ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
+                {
+                        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;
+
+       fd_ref_table[socket] = clientlist[tempnick];
+       local_users.push_back(clientlist[tempnick]);
+
+        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;
+                }
+        }
+
+        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-1);
+                }
+                if (user->registered == 7)
+                {
+                        char* pars[1];
+                        pars[0] = nick;
+                       std::string cmd = "NICK";
+                        ServerInstance->Parser->CallHandler(cmd,pars,1,user);
+                }
+        }
 }