]> git.netwichtig.de Git - user/henk/code/inspircd.git/blobdiff - src/inspircd.cpp
Added kqueue for listening sockets
[user/henk/code/inspircd.git] / src / inspircd.cpp
index 8cf2d9dd08aa79a23d8bf4292f367cdaf8de2932..2a2696413451bf275d3ef72d0988af3cc82d66bf 100644 (file)
@@ -27,6 +27,11 @@ using namespace std;
 #include <sys/errno.h>
 #include <sys/ioctl.h>
 #include <sys/utsname.h>
+#ifdef USE_KQUEUE
+#include <sys/types.h>
+#include <sys/event.h>
+#include <sys/time.h>
+#endif
 #include <cstdio>
 #include <time.h>
 #include <string>
@@ -106,6 +111,10 @@ bool unlimitcore = false;
 
 time_t TIME = time(NULL);
 
+#ifdef USE_KQUEUE
+int kq, lkq;
+#endif
+
 namespace nspace
 {
 #ifdef GCC34
@@ -200,7 +209,7 @@ ClassVector Classes;
 struct linger linger = { 0 };
 char MyExecutable[1024];
 int boundPortCount = 0;
-int portCount = 0, UDPportCount = 0, ports[MAXSOCKS];
+int portCount = 0, SERVERportCount = 0, ports[MAXSOCKS];
 int defaultRoute = 0;
 char ModPath[MAXBUF];
 
@@ -218,6 +227,10 @@ std::stringstream config_f(stringstream::in | stringstream::out);
 
 std::vector<userrec*> all_opers;
 
+static char already_sent[65536];
+
+char lowermap[255];
+
 void AddOper(userrec* user)
 {
        log(DEBUG,"Oper added to optimization list");
@@ -589,7 +602,7 @@ void Write(int sock,char *text, ...)
        va_end(argsPtr);
        int bytes = snprintf(tb,MAXBUF,"%s\r\n",textbuffer);
        chop(tb);
-       if (sock != -1)
+       if ((sock != -1) && (sock != FD_MAGIC_NUMBER))
        {
                int MOD_RESULT = 0;
                FOREACH_RESULT(OnRawSocketWrite(sock,tb,bytes > 512 ? 512 : bytes));
@@ -623,7 +636,7 @@ void WriteServ(int sock, char* text, ...)
        va_end(argsPtr);
        int bytes = snprintf(tb,MAXBUF,":%s %s\r\n",ServerName,textbuffer);
        chop(tb);
-       if (sock != -1)
+       if ((sock != -1) && (sock != FD_MAGIC_NUMBER))
        {
                 int MOD_RESULT = 0;
                 FOREACH_RESULT(OnRawSocketWrite(sock,tb,bytes > 512 ? 512 : bytes));
@@ -657,7 +670,7 @@ void WriteFrom(int sock, userrec *user,char* text, ...)
        va_end(argsPtr);
        int bytes = snprintf(tb,MAXBUF,":%s!%s@%s %s\r\n",user->nick,user->ident,user->dhost,textbuffer);
        chop(tb);
-       if (sock != -1)
+       if ((sock != -1) && (sock != FD_MAGIC_NUMBER))
        {
                 int MOD_RESULT = 0;
                 FOREACH_RESULT(OnRawSocketWrite(sock,tb,bytes > 512 ? 512 : bytes));
@@ -858,7 +871,9 @@ void WriteCommon(userrec *u, char* text, ...)
        va_end(argsPtr);
 
        // FIX: Stops a message going to the same person more than once
-       std::vector<int> already_sent;
+       bzero(&already_sent,65536);
+
+       bool sent_to_at_least_one = false;
 
         for (int i = 0; i < MAXCHANS; i++)
         {
@@ -869,26 +884,18 @@ void WriteCommon(userrec *u, char* text, ...)
                         {
                                 char* o = (*ulist)[j];
                                 userrec* otheruser = (userrec*)o;
-                               bool do_send = true;
-                               for (int t = 0; t < already_sent.size(); t++)
+                               if ((otheruser->fd > 0) && (!already_sent[otheruser->fd]))
                                {
-                                       if (already_sent[t] == otheruser->fd)
-                                       {
-                                               do_send = false;
-                                               break;
-                                       }
-                               }
-                               if (do_send)
-                               {
-                                       already_sent.push_back(otheruser->fd);
+                                       already_sent[otheruser->fd] = 1;
                                        WriteFrom(otheruser->fd,u,"%s",textbuffer);
+                                       sent_to_at_least_one = true;
                                }
                         }
                 }
         }
        // if the user was not in any channels, no users will receive the text. Make sure the user
        // receives their OWN message for WriteCommon
-       if (!already_sent.size())
+       if (!sent_to_at_least_one)
        {
                WriteFrom(u->fd,u,"%s",textbuffer);
        }
@@ -916,7 +923,7 @@ void WriteCommonExcept(userrec *u, char* text, ...)
        vsnprintf(textbuffer, MAXBUF, text, argsPtr);
        va_end(argsPtr);
 
-       std::vector<int> already_sent;
+        bzero(&already_sent,65536);
 
         for (int i = 0; i < MAXCHANS; i++)
         {
@@ -929,18 +936,9 @@ void WriteCommonExcept(userrec *u, char* text, ...)
                                 userrec* otheruser = (userrec*)o;
                                if (u != otheruser)
                                {
-                                       bool do_send = true;
-                                       for (int t = 0; t < already_sent.size(); t++)
-                                       {
-                                               if (already_sent[t] == otheruser->fd)
-                                               {
-                                                       do_send = false;
-                                                       break;
-                                               }
-                                       }
-                                       if (do_send)
+                                       if ((otheruser->fd > 0) && (!already_sent[otheruser->fd]))
                                        {
-                                               already_sent.push_back(otheruser->fd);
+                                               already_sent[otheruser->fd] = 1;
                                                WriteFrom(otheruser->fd,u,"%s",textbuffer);
                                        }
                                }
@@ -1318,19 +1316,10 @@ void WriteWallOps(userrec *source, bool local_only, char* text, ...)
 
 void strlower(char *n)
 {
-       if (!n)
-       {
-               return;
-       }
-       for (int i = 0; n[i] != 0; i++)
+       if (n)
        {
-               n[i] = tolower(n[i]);
-               if (n[i] == '[')
-                       n[i] = '{';
-               if (n[i] == ']')
-                       n[i] = '}';
-               if (n[i] == '\\')
-                       n[i] = '|';
+               for (char* t = n; *t; t++)
+                       *t = lowermap[*t];
        }
 }
 
@@ -1519,32 +1508,31 @@ void userlist(userrec *user,chanrec *c)
        }
 
        snprintf(list,MAXBUF,"353 %s = %s :", user->nick, c->name);
-       for (user_hash::const_iterator i = clientlist.begin(); i != clientlist.end(); i++)
+
+        std::vector<char*> *ulist = c->GetUsers();
+       for (int i = 0; i < ulist->size(); i++)
        {
-               if (has_channel(i->second,c))
+               char* o = (*ulist)[i];
+               userrec* otheruser = (userrec*)o;
+               if ((!has_channel(user,c)) && (strchr(otheruser->modes,'i')))
                {
-                       if (isnick(i->second->nick))
-                       {
-                               if ((!has_channel(i->second,c)) && (strchr(i->second->modes,'i')))
-                               {
-                                       /* user is +i, and source not on the channel, does not show
-                                        * nick in NAMES list */
-                                       continue;
-                               }
-                               strlcat(list,cmode(i->second,c),MAXBUF);
-                               strlcat(list,i->second->nick,MAXBUF);
-                               strlcat(list," ",MAXBUF);
-                               if (strlen(list)>(480-NICKMAX))
-                               {
-                                       /* list overflowed into
-                                        * multiple numerics */
-                                       WriteServ(user->fd,"%s",list);
-                                       snprintf(list,MAXBUF,"353 %s = %s :", user->nick, c->name);
-                               }
-                       }
+                       /* user is +i, and source not on the channel, does not show
+                        * nick in NAMES list */
+                       continue;
+               }
+               strlcat(list,cmode(otheruser,c),MAXBUF);
+               strlcat(list,otheruser->nick,MAXBUF);
+               strlcat(list," ",MAXBUF);
+               if (strlen(list)>(480-NICKMAX))
+               {
+                       /* list overflowed into
+                        * multiple numerics */
+                       WriteServ(user->fd,"%s",list);
+                       snprintf(list,MAXBUF,"353 %s = %s :", user->nick, c->name);
                }
        }
-       /* if whats left in the list isnt empty, send it */     if (list[strlen(list)-1] != ':')
+       /* if whats left in the list isnt empty, send it */
+       if (list[strlen(list)-1] != ':')
        {
                WriteServ(user->fd,"%s",list);
        }
@@ -2213,8 +2201,17 @@ void kill_link(userrec *user,const char* r)
        if (user->fd > -1)
        {
                FOREACH_MOD OnRawSocketClose(user->fd);
-               shutdown(user->fd,2);
-               close(user->fd);
+#ifdef USE_KQUEUE
+               struct kevent ke;
+               EV_SET(&ke, user->fd, EVFILT_READ, EV_DELETE, 0, 0, NULL);
+               int i = kevent(kq, &ke, 1, 0, 0, NULL);
+               if (i == -1)
+               {
+                       log(DEBUG,"kqueue: Failed to remove user from queue!");
+               }
+#endif
+                shutdown(user->fd,2);
+                close(user->fd);
        }
        
        if (user->registered == 7) {
@@ -2268,6 +2265,15 @@ void kill_link_silent(userrec *user,const char* r)
         if (user->fd > -1)
         {
                FOREACH_MOD OnRawSocketClose(user->fd);
+#ifdef USE_KQUEUE
+                struct kevent ke;
+                EV_SET(&ke, user->fd, EVFILT_READ, EV_DELETE, 0, 0, NULL);
+                int i = kevent(kq, &ke, 1, 0, 0, NULL);
+                if (i == -1)
+                {
+                        log(DEBUG,"kqueue: Failed to remove user from queue!");
+                }
+#endif
                 shutdown(user->fd,2);
                 close(user->fd);
         }
@@ -2352,7 +2358,7 @@ void Error(int status)
 }
 
 
-int main(int argc, char **argv)
+int main(int argc, char** argv)
 {
        Start();
        srand(time(NULL));
@@ -2380,7 +2386,18 @@ int main(int argc, char **argv)
        }
        strlcpy(MyExecutable,argv[0],MAXBUF);
        
-       if (InspIRCd() == ERROR)
+       // initialize the lowercase mapping table
+       for (int cn = 0; cn < 256; cn++)
+               lowermap[cn] = cn;
+       // lowercase the uppercase chars
+       for (int cn = 65; cn < 91; cn++)
+               lowermap[cn] = tolower(cn);
+       // now replace the specific chars for scandanavian comparison
+       lowermap['['] = '{';
+       lowermap[']'] = '}';
+       lowermap['\\'] = '|';
+
+       if (InspIRCd(argv,argc) == ERROR)
        {
                log(DEFAULT,"main: daemon function bailed");
                printf("ERROR: could not initialise. Shutting down.\n");
@@ -2584,6 +2601,48 @@ void AddClient(int socket, char* host, int port, bool iscached, char* ip)
                }
        }
        fd_ref_table[socket] = clientlist[tempnick];
+
+#ifdef USE_KQUEUE
+       struct kevent ke;
+       log(DEBUG,"kqueue: Add user to events, kq=%d socket=%d",kq,socket);
+       EV_SET(&ke, socket, EVFILT_READ, EV_ADD, 0, 0, NULL);
+        int i = kevent(kq, &ke, 1, 0, 0, NULL);
+        if (i == -1)
+        {
+               switch (errno)
+               {
+                       case EACCES:
+                               log(DEBUG,"kqueue: EACCES");
+                       break;
+                       case EFAULT:
+                               log(DEBUG,"kqueue: EFAULT");
+                       break;
+                       case EBADF:
+                               log(DEBUG,"kqueue: EBADF=%d",ke.ident);
+                       break;
+                       case EINTR:
+                               log(DEBUG,"kqueue: EINTR");
+                       break;
+                       case EINVAL:
+                               log(DEBUG,"kqueue: EINVAL");
+                       break;
+                       case ENOENT:
+                               log(DEBUG,"kqueue: ENOENT");
+                       break;
+                       case ENOMEM:
+                               log(DEBUG,"kqueue: ENOMEM");
+                       break;
+                       case ESRCH:
+                               log(DEBUG,"kqueue: ESRCH");
+                       break;
+                       default:
+                               log(DEBUG,"kqueue: UNKNOWN!");
+                       break;
+               }
+                log(DEBUG,"kqueue: Failed to add user to queue!");
+        }
+
+#endif
 }
 
 // this function counts all users connected, wether they are registered or NOT.
@@ -2679,18 +2738,22 @@ long local_count()
 
 void ShowMOTD(userrec *user)
 {
+       char buf[65536];
         std::string WholeMOTD = "";
         if (!MOTD.size())
         {
                 WriteServ(user->fd,"422 %s :Message of the day file is missing.",user->nick);
                 return;
         }
-        WholeMOTD = std::string(":") + std::string(ServerName) + std::string(" 375 ") + std::string(user->nick) + std::string(" :- ") + std::string(ServerName) + " message of the day\r\n";
+        snprintf(buf,65535,":%s 375 %s :- %s message of the day\r\n", ServerName, user->nick, ServerName);
+       WholeMOTD = WholeMOTD + buf;
         for (int i = 0; i != MOTD.size(); i++)
         {
-                WholeMOTD = WholeMOTD + std::string(":") + std::string(ServerName) + std::string(" 372 ") + std::string(user->nick) + std::string(" :- ") + MOTD[i] + std::string("\r\n");
+               snprintf(buf,65535,":%s 372 %s :- %s\r\n", ServerName, user->nick, MOTD[i].c_str());
+                WholeMOTD = WholeMOTD + buf;
         }
-        WholeMOTD = WholeMOTD + std::string(":") + std::string(ServerName) + std::string(" 376 ") + std::string(user->nick) + std::string(" :End of message of the day.\r\n");
+       snprintf(buf,65535,":%s 376 %s :End of message of the day.\r\n", ServerName, user->nick);
+        WholeMOTD = WholeMOTD + buf;
         // only one write operation
         send(user->fd,WholeMOTD.c_str(),WholeMOTD.length(),0);
        statsSent += WholeMOTD.length();
@@ -2715,7 +2778,6 @@ void ShowRULES(userrec *user)
 void FullConnectUser(userrec* user)
 {
        statsConnects++;
-        user->registered = 7;
         user->idle_lastmsg = TIME;
         log(DEBUG,"ConnectUser: %s",user->nick);
 
@@ -2753,6 +2815,9 @@ void FullConnectUser(userrec* user)
                }
        }
 
+       // fix by brain: move this below the xline checks to prevent spurious quits going onto the net that dont belong
+       user->registered = 7;
+
         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Network);
         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Network,user->nick,user->ident,user->host);
         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,ServerName,VERSION);
@@ -2763,7 +2828,7 @@ void FullConnectUser(userrec* user)
         v << "MESHED WALLCHOPS MODES=13 CHANTYPES=# PREFIX=(ohv)@%+ MAP SAFELIST MAXCHANNELS=" << MAXCHANS;
         v << " MAXBANS=60 NICKLEN=" << NICKMAX;
         v << " TOPICLEN=307 KICKLEN=307 MAXTARGETS=20 AWAYLEN=307 CHANMODES=ohvb,k,l,psmnti NETWORK=";
-        v << std::string(Network);
+        v << Network;
         std::string data005 = v.str();
         FOREACH_MOD On005Numeric(data005);
         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
@@ -2785,12 +2850,14 @@ void FullConnectUser(userrec* user)
                 }
         }
         ShowMOTD(user);
-        FOREACH_MOD OnUserConnect(user);
-        WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,user->ip);
 
         char buffer[MAXBUF];
        snprintf(buffer,MAXBUF,"N %lu %s %s %s %s +%s %s %s :%s",(unsigned long)user->age,user->nick,user->host,user->dhost,user->ident,user->modes,user->ip,ServerName,user->fullname);
         NetSendToAll(buffer);
+
+       // fix by brain: these should be AFTER the N token, so other servers know what the HELL we're on about... :)
+       FOREACH_MOD OnUserConnect(user);
+       WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,user->ip);
 }
 
 
@@ -2828,7 +2895,12 @@ std::string GetVersionString()
         s1 = savept;
         v2 = strtok_r(s1," ",&savept);
         s1 = savept;
-       snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s (O=%lu)",VERSION,v2,ServerName,SYSTEM,(unsigned long)OPTIMISATION);
+#ifdef USE_KQUEUE
+       char socketengine[] = "kqueue";
+#else
+       char socketengine[] = "select";
+#endif
+       snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s (O=%lu) [SE=%s]",VERSION,v2,ServerName,SYSTEM,(unsigned long)OPTIMISATION,socketengine);
        return versiondata;
 }
 
@@ -2840,6 +2912,20 @@ void handle_version(char **parameters, int pcnt, userrec *user)
        }
        else
        {
+               if (!strcmp(parameters[0],"*"))
+               {
+                       for (int j = 0; j < 32; j++)
+                       {
+                               if (me[j] != NULL)
+                               {
+                                       for (int x = 0; x < me[j]->connectors.size(); x++)
+                                       {
+                                               WriteServ(user->fd,"351 %s :Server %d:%d (%s): %s",user->nick,j,x,me[j]->connectors[x].GetServerName().c_str(),me[j]->connectors[x].GetVersionString().c_str());
+                                       }
+                               }
+                       }
+                       return;
+               }
                if (match(ServerName,parameters[0]))
                {
                        WriteServ(user->fd,"351 %s :%s",user->nick,GetVersionString().c_str());
@@ -2869,7 +2955,10 @@ void handle_version(char **parameters, int pcnt, userrec *user)
                        WriteServ(user->fd,"402 %s %s :Server %s has no version information",user->nick,parameters[0],parameters[0]);
                        return;
                }
-               WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
+               if (!found)
+               {
+                       WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
+               }
        }
        return;
 }
@@ -3526,7 +3615,7 @@ void DoSync(serverrec* serv, char* tcp_host)
                                serv->SendPacket(data,tcp_host);
                        }
                }
-               char* chl = chlist(u->second);
+               char* chl = chlist(u->second,u->second);
                if (strcmp(chl,""))
                {
                        snprintf(data,MAXBUF,"J %s %s",u->second->nick,chl);
@@ -3727,9 +3816,10 @@ void erase_module(int j)
 
 bool UnloadModule(const char* filename)
 {
+       std::string filename_str = filename;
        for (int j = 0; j != module_names.size(); j++)
        {
-               if (module_names[j] == std::string(filename))
+               if (module_names[j] == filename_str)
                {
                        if (modules[j]->GetVersion().Flags & VF_STATIC)
                        {
@@ -3789,10 +3879,37 @@ bool DirValid(char* dirandfile)
        else return false;
 }
 
+std::string GetFullProgDir(char** argv, int argc)
+{
+       char work[MAXBUF];
+       strlcpy(work,argv[0],MAXBUF);
+       int p = strlen(work);
+       // we just want the dir
+       while (strlen(work))
+       {
+               if (work[p] == '/')
+               {
+                       work[p] = '\0';
+                       break;
+               }
+               work[p--] = '\0';
+       }
+       char buffer[MAXBUF], otherdir[MAXBUF];
+       // Get the current working directory
+       if( getcwd( buffer, MAXBUF ) == NULL )
+               return "";
+       chdir(work);
+       if( getcwd( otherdir, MAXBUF ) == NULL )
+               return "";
+       chdir(buffer);
+       return otherdir;
+}
+
 bool LoadModule(const char* filename)
 {
        char modfile[MAXBUF];
        snprintf(modfile,MAXBUF,"%s/%s",ModPath,filename);
+       std::string filename_str = filename;
        if (!DirValid(modfile))
        {
                log(DEFAULT,"Module %s is not within the modules directory.",modfile);
@@ -3804,7 +3921,7 @@ bool LoadModule(const char* filename)
         {
                for (int j = 0; j < module_names.size(); j++)
                {
-                       if (module_names[j] == std::string(filename))
+                       if (module_names[j] == filename_str)
                        {
                                log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
                                snprintf(MODERR,MAXBUF,"Module already loaded");
@@ -3845,7 +3962,7 @@ bool LoadModule(const char* filename)
        return true;
 }
 
-int InspIRCd(void)
+int InspIRCd(char** argv, int argc)
 {
        struct sockaddr_in client,server;
        char addrs[MAXBUF][255];
@@ -3857,12 +3974,14 @@ int InspIRCd(void)
        fd_set selectFds;
        timeval tv;
 
-       log_file = fopen("ircd.log","a+");
+       std::string logpath = GetFullProgDir(argv,argc) + "/ircd.log";
+       log_file = fopen(logpath.c_str(),"a+");
        if (!log_file)
        {
-               printf("ERROR: Could not write to logfile ircd.log, bailing!\n\n");
+               printf("ERROR: Could not write to logfile %s, bailing!\n\n",logpath.c_str());
                Exit(ERROR);
        }
+       printf("Logging to %s...\n",logpath.c_str());
 
        log(DEFAULT,"$Id$");
        if (geteuid() == 0)
@@ -3920,9 +4039,9 @@ int InspIRCd(void)
                log(DEBUG,"InspIRCd: startup: read binding %s:%s [%s] from config",Addr,configToken, Type);
        }
        portCount = clientportcount;
-       UDPportCount = serverportcount;
+       SERVERportCount = serverportcount;
          
-       log(DEBUG,"InspIRCd: startup: read %lu total client ports and %lu total server ports",(unsigned long)portCount,(unsigned long)UDPportCount);
+       log(DEBUG,"InspIRCd: startup: read %lu total client ports and %lu total server ports",(unsigned long)portCount,(unsigned long)SERVERportCount);
        log(DEBUG,"InspIRCd: startup: InspIRCd is now starting!");
        
        printf("\n");
@@ -3998,24 +4117,59 @@ int InspIRCd(void)
                 }
         }
 
+       // BUGFIX: We cannot initialize this before forking, as the kqueue data is not inherited by child processes!
+#ifdef USE_KQUEUE
+        kq = kqueue();
+       lkq = kqueue();
+        if ((kq == -1) || (lkq == -1))
+        {
+                log(DEFAULT,"main: kqueue() failed!");
+                printf("ERROR: could not initialise kqueue event system. Shutting down.\n");
+                Exit(ERROR);
+        }
+#endif
+
+
+#ifdef USE_KQUEUE
+       log(DEFAULT,"kqueue socket engine is enabled. Filling listen list.");
+       for (count = 0; count < boundPortCount; count++)
+       {
+               struct kevent ke;
+               log(DEBUG,"kqueue: Add listening socket to events, kq=%d socket=%d",lkq,openSockfd[count]);
+               EV_SET(&ke, openSockfd[count], EVFILT_READ, EV_ADD, 0, 5, NULL);
+               int i = kevent(lkq, &ke, 1, 0, 0, NULL);
+               if (i == -1)
+               {
+                       log(DEFAULT,"main: add listen ports to kqueue failed!");
+                       printf("ERROR: could not initialise listening sockets in kqueue. Shutting down.\n");
+               }
+       }
+#else
+       log(DEFAULT,"Using standard select socket engine.");
+#endif
+
        WritePID(PID);
 
        length = sizeof (client);
-       char udp_msg[MAXBUF],tcp_host[MAXBUF];
+       char tcp_msg[MAXBUF],tcp_host[MAXBUF];
 
+#ifdef USE_KQUEUE
+        struct kevent ke;
+        struct timespec ts;
+#endif
         fd_set serverfds;
         timeval tvs;
         tvs.tv_usec = 10000L;
         tvs.tv_sec = 0;
        tv.tv_sec = 0;
        tv.tv_usec = 10000L;
-        char data[65535];
+        char data[65536];
        timeval tval;
        fd_set sfd;
         tval.tv_usec = 10000L;
         tval.tv_sec = 0;
         int total_in_this_set = 0;
-       int v = 0;
+       int i = 0, v = 0;
        bool expire_run = false;
          
        /* main loop, this never returns */
@@ -4048,7 +4202,7 @@ int InspIRCd(void)
 
                FD_ZERO(&serverfds);
                
-               for (int x = 0; x != UDPportCount; x++)
+               for (int x = 0; x != SERVERportCount; x++)
                {
                        if (me[x])
                                FD_SET(me[x]->fd, &serverfds);
@@ -4061,7 +4215,7 @@ int InspIRCd(void)
                int servresult = select(32767, &serverfds, NULL, NULL, &tvs);
                if (servresult > 0)
                {
-                       for (int x = 0; x != UDPportCount; x++)
+                       for (int x = 0; x != SERVERportCount; x++)
                        {
                                if ((me[x]) && (FD_ISSET (me[x]->fd, &serverfds)))
                                {
@@ -4083,7 +4237,7 @@ int InspIRCd(void)
                        }
                }
      
-               for (int x = 0; x < UDPportCount; x++)
+               for (int x = 0; x < SERVERportCount; x++)
                {
                        std::deque<std::string> msgs;
                        msgs.clear();
@@ -4091,39 +4245,39 @@ int InspIRCd(void)
                        {
                                for (int ctr = 0; ctr < msgs.size(); ctr++)
                                {
-                                       strlcpy(udp_msg,msgs[ctr].c_str(),MAXBUF);
-                                       log(DEBUG,"Processing: %s",udp_msg);
-                                       if (!udp_msg[0])
+                                       strlcpy(tcp_msg,msgs[ctr].c_str(),MAXBUF);
+                                       log(DEBUG,"Processing: %s",tcp_msg);
+                                       if (!tcp_msg[0])
                                        {
                                                log(DEBUG,"Invalid string from %s [route%lu]",tcp_host,(unsigned long)x);
                                                break;
                                        }
                                        // during a netburst, send all data to all other linked servers
-                                       if ((((nb_start>0) && (udp_msg[0] != 'Y') && (udp_msg[0] != 'X') && (udp_msg[0] != 'F'))) || (is_uline(tcp_host)))
+                                       if ((((nb_start>0) && (tcp_msg[0] != 'Y') && (tcp_msg[0] != 'X') && (tcp_msg[0] != 'F'))) || (is_uline(tcp_host)))
                                        {
                                                if (is_uline(tcp_host))
                                                {
-                                                       if ((udp_msg[0] != 'Y') && (udp_msg[0] != 'X') && (udp_msg[0] != 'F'))
+                                                       if ((tcp_msg[0] != 'Y') && (tcp_msg[0] != 'X') && (tcp_msg[0] != 'F'))
                                                        {
-                                                               NetSendToAllExcept(tcp_host,udp_msg);
+                                                               NetSendToAllExcept(tcp_host,tcp_msg);
                                                        }
                                                }
                                                else
-                                                       NetSendToAllExcept(tcp_host,udp_msg);
+                                                       NetSendToAllExcept(tcp_host,tcp_msg);
                                        }
-                                       std::string msg = udp_msg;
+                                       std::string msg = tcp_msg;
                                        FOREACH_MOD OnPacketReceive(msg,tcp_host);
-                                       strlcpy(udp_msg,msg.c_str(),MAXBUF);
-                                       handle_link_packet(udp_msg, tcp_host, me[x]);
+                                       strlcpy(tcp_msg,msg.c_str(),MAXBUF);
+                                       handle_link_packet(tcp_msg, tcp_host, me[x]);
                                }
                                goto label;
                        }
                }
        
-
        while (count2 != clientlist.end())
        {
                FD_ZERO(&sfd);
+
                total_in_this_set = 0;
 
                user_hash::iterator xcount = count2;
@@ -4138,12 +4292,16 @@ int InspIRCd(void)
 
                if ((curr) && (curr->fd != 0))
                {
+#ifdef _POSIX_PRIORITY_SCHEDULING
+        sched_yield();
+#endif
                        // assemble up to 64 sockets into an fd_set
                        // to implement a pooling mechanism.
                        //
                        // This should be up to 64x faster than the
                        // old implementation.
-                       while (total_in_this_set < 64)
+#ifndef USE_KQUEUE
+                       while (total_in_this_set < 1024)
                        {
                                if (count2 != clientlist.end())
                                {
@@ -4194,14 +4352,76 @@ int InspIRCd(void)
                                }
                                else break;
                        }
-   
                        endingiter = count2;
                                count2 = xcount; // roll back to where we were
+#else
+                       dns_poll();
+                       // KQUEUE: We don't go through a loop to fill the fd_set so instead we must manually do this loop every now and again.
+                       // TODO: We dont need to do all this EVERY loop iteration, tone down the visits to this if we're using kqueue.
+                       while (count2 != clientlist.end())
+                       {
+                               if (count2 != clientlist.end())
+                               {
+                                       curr = count2->second;
+                                       // we don't check the state of remote users.
+                                       if ((curr->fd != -1) && (curr->fd != FD_MAGIC_NUMBER))
+                                       {
+                                               // registration timeout -- didnt send USER/NICK/HOST in the time specified in
+                                               // their connection class.
+                                               if ((TIME > curr->timeout) && (curr->registered != 7))
+                                               {
+                                                       log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
+                                                       kill_link(curr,"Registration timeout");
+                                                       goto label;
+                                               }
+                                               if ((TIME > curr->signon) && (curr->registered == 3) && (AllModulesReportReady(curr)))
+                                               {
+                                                       log(DEBUG,"signon exceed, registered=3, and modules ready, OK: %d %d",TIME,curr->signon);
+                                                       curr->dns_done = true;
+                                                       statsDnsBad++;
+                                                       FullConnectUser(curr);
+                                                       goto label;
+                                               }
+                                               if ((curr->dns_done) && (curr->registered == 3) && (AllModulesReportReady(curr)))
+                                               {
+                                                       log(DEBUG,"dns done, registered=3, and modules ready, OK");
+                                                       FullConnectUser(curr);
+                                                       goto label;
+                                               }
+                                               if ((TIME > curr->nping) && (isnick(curr->nick)) && (curr->registered == 7))
+                                               {
+                                                       if ((!curr->lastping) && (curr->registered == 7))
+                                                       {
+                                                               log(DEBUG,"InspIRCd: ping timeout: %s",curr->nick);
+                                                               kill_link(curr,"Ping timeout");
+                                                               goto label;
+                                                       }
+                                                       Write(curr->fd,"PING :%s",ServerName);
+                                                       log(DEBUG,"InspIRCd: pinging: %s",curr->nick);
+                                                       curr->lastping = 0;
+                                                       curr->nping = TIME+curr->pingmax;       // was hard coded to 120
+                                               }
+                                       }
+                               }
+                               else break;
+                               count2++;
+                       }
+                       // increment the counter right to the end of the list, as kqueue processes everything in one go
+#endif
         
                        v = 0;
 
-                       // tvals defined here
-
+#ifdef USE_KQUEUE
+                       ts.tv_sec = 0;
+                       ts.tv_nsec = 1000L;
+                       // for now, we only read 1 event. We could read soooo many more :)
+                       int i = kevent(kq, NULL, 0, &ke, 1, &ts);
+                       if (i > 0)
+                       {
+                               log(DEBUG,"kevent call: kq=%d, i=%d",kq,i);
+                               // KQUEUE: kevent gives us ONE fd which is ready to have something done to it. Do something to it.
+                               userrec* cu = fd_ref_table[ke.ident];
+#else
                        tval.tv_usec = 1000L;
                        selectResult2 = select(65535, &sfd, NULL, NULL, &tval);
                        
@@ -4209,13 +4429,21 @@ int InspIRCd(void)
                        if (selectResult2 > 0)
                        for (user_hash::iterator count2a = xcount; count2a != endingiter; count2a++)
                        {
+                               // SELECT: we have to iterate...
+                               userrec* cu = count2a->second;
+#endif
 
 #ifdef _POSIX_PRIORITY_SCHEDULING
                                sched_yield();
 #endif
-                               userrec* cu = count2a->second;
                                result = EAGAIN;
+#ifdef USE_KQUEUE
+                               // KQUEUE: We already know we have a valid FD. No checks needed.
+                               if ((cu->fd != FD_MAGIC_NUMBER) && (cu->fd != -1))
+#else
+                               // SELECT: We don't know if our FD is valid.
                                if ((cu->fd != FD_MAGIC_NUMBER) && (cu->fd != -1) && (FD_ISSET (cu->fd, &sfd)))
+#endif
                                {
                                        log(DEBUG,"Data waiting on socket %d",cu->fd);
                                        int MOD_RESULT = 0;
@@ -4227,7 +4455,6 @@ int InspIRCd(void)
                                        }
                                        else result = result2;
                                        log(DEBUG,"Read result: %d",result);
-       
                                        if (result)
                                        {
                                                statsRecv += result;
@@ -4245,6 +4472,7 @@ int InspIRCd(void)
                                                int currfd = current->fd;
                                                int floodlines = 0;
                                                // add the data to the users buffer
+                                               if (result > 0)
                                                if (!current->AddBuffer(data))
                                                {
                                                        // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
@@ -4323,6 +4551,7 @@ int InspIRCd(void)
                                                        strlcpy(sanitized,single_line.c_str(),MAXBUF);
                                                        if (*sanitized)
                                                        {
+                                                               userrec* old_comp = fd_ref_table[currfd];
                                                                // we're gonna re-scan to check if the nick is gone, after every
                                                                // command - if it has, we're gonna bail
                                                                process_buffer(sanitized,current);
@@ -4330,7 +4559,8 @@ int InspIRCd(void)
                                                                // we cant do anything more with their buffer, so bail.
                                                                // there used to be an ugly, slow loop here. Now we have a reference
                                                                // table, life is much easier (and FASTER)
-                                                               if (!fd_ref_table[currfd])
+                                                               userrec* new_comp = fd_ref_table[currfd];
+                                                               if ((currfd < 0) || (!fd_ref_table[currfd]) || (old_comp != new_comp))
                                                                        goto label;
 
                                                        }
@@ -4352,14 +4582,18 @@ int InspIRCd(void)
                                else
                                if (result == 0)
                                {
+#ifndef USE_KQUEUE
                                        if (count2->second)
                                        {
+#endif
                                                log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
                                                kill_link(cu,"Client exited");
                                                // must bail here? kill_link removes the hash, corrupting the iterator
                                                log(DEBUG,"Bailing from client exit");
                                                goto label;
+#ifndef USE_KQUEUE
                                        }
+#endif
                                }
                                else if (result > 0)
                                {
@@ -4376,6 +4610,7 @@ int InspIRCd(void)
         sched_yield();
 #endif
        
+#ifndef USE_KQUEUE
        // set up select call
        for (count = 0; count < boundPortCount; count++)
        {
@@ -4388,11 +4623,27 @@ int InspIRCd(void)
        /* select is reporting a waiting socket. Poll them all to find out which */
        if (selectResult > 0)
        {
-               char target[MAXBUF], resolved[MAXBUF];
-               for (count = 0; count < boundPortCount; count++)                
+               for (count = 0; count < boundPortCount; count++)
                {
                        if (FD_ISSET (openSockfd[count], &selectFds))
                        {
+#else
+       ts.tv_sec = 0;
+       ts.tv_nsec = 30000L;
+       i = kevent(lkq, NULL, 0, &ke, 1, &ts);
+       if (i > 0)
+       {
+               log(DEBUG,"kqueue: Listening socket event, i=%d, ke.ident=%d",i,ke.ident);
+               // this isnt as efficient as it could be, we could create a reference table
+               // to reference bound ports by fd, but this isnt a big bottleneck as the actual
+               // number of listening ports on the average ircd is a small number (less than 20)
+               // compared to the number of clients (possibly over 2000)
+               for (count = 0; count < boundPortCount; count++)
+               {
+                       if (ke.ident == openSockfd[count])
+                       {
+#endif
+                               char target[MAXBUF], resolved[MAXBUF];
                                length = sizeof (client);
                                incomingSockfd = accept (openSockfd[count], (struct sockaddr *) &client, &length);
                              
@@ -4420,6 +4671,7 @@ int InspIRCd(void)
        if (0) {};
 #ifdef _POSIX_PRIORITY_SCHEDULING
         sched_yield();
+       sched_yield();
 #endif
 }
 /* not reached */