Add sanity checks to the ssl modules so that theres no possibility of an out of range...

[user/henk/code/inspircd.git] / src / socketengine_kqueue.cpp

diff --git a/src/socketengine_kqueue.cpp b/src/socketengine_kqueue.cpp
index 9a63c972fc2fdd67fba91c883d6bee51bd412f80..50f6242e2914de027b92d613e5c2fd2ec970e54e 100644 (file)
--- a/src/socketengine_kqueue.cpp
+++ b/src/socketengine_kqueue.cpp
@@ -2,12 +2,9 @@
  *       | Inspire Internet Relay Chat Daemon |
  *       +------------------------------------+
  *
- *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
- *                       E-mail:
- *                <brain@chatspike.net>
- *                <Craig@chatspike.net>
+ *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
+ * See: http://www.inspircd.org/wiki/index.php/Credits
  *
- * Written by Craig Edwards, Craig McLure, and others.
  * This program is free but copyrighted software; see
  *            the file COPYING for details.
  *
@@ -15,6 +12,7 @@
  */
 
 #include "inspircd.h"
+#include "exitcodes.h"
 #include <sys/types.h>
 #include <sys/event.h>
 #include <sys/time.h>
@@ -23,6 +21,16 @@
 
 KQueueEngine::KQueueEngine(InspIRCd* Instance) : SocketEngine(Instance)
 {
+       this->RecoverFromFork();
+}
+
+void KQueueEngine::RecoverFromFork()
+{
+       /*
+        * The only bad thing about kqueue is that its fd cant survive a fork and is not inherited.
+        * BUM HATS.
+        * 
+        */
        EngineHandle = kqueue();
        if (EngineHandle == -1)
        {
@@ -30,64 +38,49 @@ KQueueEngine::KQueueEngine(InspIRCd* Instance) : SocketEngine(Instance)
                ServerInstance->Log(SPARSE,"ERROR: this is a fatal error, exiting now.");
                printf("ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features.");
                printf("ERROR: this is a fatal error, exiting now.");
-               InspIRCd::Exit(ERROR);
+               ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
        }
        CurrentSetSize = 0;
 }
 
 KQueueEngine::~KQueueEngine()
 {
-       ServerInstance->Log(DEBUG,"KQueueEngine::~KQueueEngine()");
-       close(EngineHandle);
+       this->Close(EngineHandle);
 }
 
 bool KQueueEngine::AddFd(EventHandler* eh)
 {
        int fd = eh->GetFd();
 
-       ServerInstance->Log(DEBUG,"KQueueEngine::AddFd(%d)",fd);
-
        if ((fd < 0) || (fd > MAX_DESCRIPTORS))
-       {
-               ServerInstance->Log(DEFAULT,"ERROR: FD of %d added above max of %d",fd,MAX_DESCRIPTORS);
                return false;
-       }
+
        if (GetRemainingFds() <= 1)
-       {
-               ServerInstance->Log(DEFAULT,"ERROR: System out of file descriptors!");
                return false;
-       }
 
        if (ref[fd])
-       {
-               ServerInstance->Log(DEFAULT,"ERROR: Slot already occupied");
                return false;
-       }
-
-       ref[fd] = eh;
-       ServerInstance->Log(DEBUG,"Add socket %d",fd);
 
        struct kevent ke;
-       ServerInstance->Log(DEBUG,"kqueue: Add socket to events, kq=%d socket=%d",EngineHandle,fd);
        EV_SET(&ke, fd, eh->Readable() ? EVFILT_READ : EVFILT_WRITE, EV_ADD, 0, 0, NULL);
 
        int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
        if (i == -1)
        {
-               ServerInstance->Log(DEBUG,"kqueue: List insertion failure!");
                return false;
        }
 
+       ref[fd] = eh;
        CurrentSetSize++;
+
+       ServerInstance->Log(DEBUG,"New file descriptor: %d", fd);
        return true;
 }
 
-bool KQueueEngine::DelFd(EventHandler* eh)
+bool KQueueEngine::DelFd(EventHandler* eh, bool force)
 {
        int fd = eh->GetFd();
 
-       ServerInstance->Log(DEBUG,"KQueueEngine::DelFd(%d)",fd);
-
        if ((fd < 0) || (fd > MAX_DESCRIPTORS))
                return false;
 
@@ -95,17 +88,18 @@ bool KQueueEngine::DelFd(EventHandler* eh)
        EV_SET(&ke, eh->GetFd(), EVFILT_READ, EV_DELETE, 0, 0, NULL);
 
        int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
-       
+
        EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
 
        int j = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
 
-       if ((j < 0) && (i < 0))
+       if ((j < 0) && (i < 0) && !force)
                return false;
 
        CurrentSetSize--;
        ref[fd] = NULL;
 
+       ServerInstance->Log(DEBUG,"Remove file descriptor: %d", fd);
        return true;
 }
 
@@ -117,11 +111,7 @@ void KQueueEngine::WantWrite(EventHandler* eh)
         */
        struct kevent ke;
        EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_ADD | EV_ONESHOT, 0, 0, NULL);
-       int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
-       if (i == -1)
-       {
-               ServerInstance->Log(DEBUG,"kqueue: Unable to set fd %d for wanting write", eh->GetFd());
-       }
+       kevent(EngineHandle, &ke, 1, 0, 0, NULL);
 }
 
 int KQueueEngine::GetMaxFds()
@@ -136,26 +126,37 @@ int KQueueEngine::GetRemainingFds()
 
 int KQueueEngine::DispatchEvents()
 {
-       ts.tv_nsec = 5000L;
-       ts.tv_sec = 0;
+       ts.tv_nsec = 0;
+       ts.tv_sec = 1;
        int i = kevent(EngineHandle, NULL, 0, &ke_list[0], MAX_DESCRIPTORS, &ts);
        for (int j = 0; j < i; j++)
        {
-               ServerInstance->Log(DEBUG,"Handle %s event on fd %d",ke_list[j].flags & EVFILT_WRITE ? "write" : "read", ke_list[j].ident);
+               if (ke_list[j].flags & EV_EOF)
+               {
+                       /* We love you kqueue, oh yes we do *sings*!
+                        * kqueue gives us the error number directly in the EOF state!
+                        * Unlike smelly epoll and select, where we have to getsockopt
+                        * to get the error, this saves us time and cpu cycles. Go BSD!
+                        */
+                       if (ref[ke_list[j].ident])
+                               ref[ke_list[j].ident]->HandleEvent(EVENT_ERROR, ke_list[j].fflags);
+                       continue;
+               }
                if (ke_list[j].flags & EVFILT_WRITE)
                {
+                       /* This looks wrong but its right. As above, theres no modify
+                        * call in kqueue. See the manpage.
+                        */
                        struct kevent ke;
                        EV_SET(&ke, ke_list[j].ident, EVFILT_READ, EV_ADD, 0, 0, NULL);
-                       int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
-                       if (i == -1)
-                       {
-                               ServerInstance->Log(DEBUG,"kqueue: Unable to set fd %d back to just wanting to read!", ke_list[j].ident);
-                       }
-                       ref[ke_list[j].ident]->HandleEvent(EVENT_WRITE);
+                       kevent(EngineHandle, &ke, 1, 0, 0, NULL);
+                       if (ref[ke_list[j].ident])
+                               ref[ke_list[j].ident]->HandleEvent(EVENT_WRITE);
                }
                else
                {
-                       ref[ke_list[j].ident]->HandleEvent(EVENT_READ);
+                       if (ref[ke_list[j].ident])
+                               ref[ke_list[j].ident]->HandleEvent(EVENT_READ);
                }
        }