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authorOthmar Gsenger <otti@anytun.org>2008-04-12 11:38:42 +0000
committerOthmar Gsenger <otti@anytun.org>2008-04-12 11:38:42 +0000
commitfffd213c8cba2135afda493d797c41c10354770e (patch)
treebb5eea1b12871d8c3fed0e687d83be3e504d11b2 /openvpn/tap-win32/instance.c
parentsvn cleanup (diff)
big svn cleanup
Diffstat (limited to 'openvpn/tap-win32/instance.c')
-rwxr-xr-xopenvpn/tap-win32/instance.c245
1 files changed, 0 insertions, 245 deletions
diff --git a/openvpn/tap-win32/instance.c b/openvpn/tap-win32/instance.c
deleted file mode 100755
index 53c800c..0000000
--- a/openvpn/tap-win32/instance.c
+++ /dev/null
@@ -1,245 +0,0 @@
-/*
- * TAP-Win32 -- A kernel driver to provide virtual tap device
- * functionality on Windows. Originally derived
- * from the CIPE-Win32 project by Damion K. Wilson,
- * with extensive modifications by James Yonan.
- *
- * All source code which derives from the CIPE-Win32 project is
- * Copyright (C) Damion K. Wilson, 2003, and is released under the
- * GPL version 2 (see below).
- *
- * All other source code is Copyright (C) 2002-2005 OpenVPN Solutions LLC,
- * and is released under the GPL version 2 (see below).
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (see the file COPYING included with this
- * distribution); if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#define INSTANCE_KEY(a) ((PVOID)((a)->m_Extension.m_TapDevice))
-
-#define N_INSTANCE_BUCKETS 256
-
-typedef struct _INSTANCE {
- struct _INSTANCE *next;
- TapAdapterPointer m_Adapter;
-} INSTANCE;
-
-typedef struct {
- INSTANCE *list;
- MUTEX lock;
-} INSTANCE_BUCKET;
-
-typedef struct {
- INSTANCE_BUCKET buckets[N_INSTANCE_BUCKETS];
-} INSTANCE_HASH;
-
-INSTANCE_HASH *g_InstanceHash = NULL;
-
-// must return a hash >= 0 and < N_INSTANCE_BUCKETS
-int
-InstanceHashValue (PVOID addr)
-{
- UCHAR *p = (UCHAR *) &addr;
-
- if (sizeof (addr) == 4)
- return p[0] ^ p[1] ^ p[2] ^ p[3];
- else if (sizeof (addr) == 8)
- return p[0] ^ p[1] ^ p[2] ^ p[3] ^ p[4] ^ p[5] ^ p[6] ^ p[7];
- else
- {
- MYASSERT (0);
- }
-}
-
-BOOLEAN
-InitInstanceList (VOID)
-{
- MYASSERT (g_InstanceHash == NULL);
- g_InstanceHash = MemAlloc (sizeof (INSTANCE_HASH), TRUE);
- if (g_InstanceHash)
- {
- int i;
- for (i = 0; i < N_INSTANCE_BUCKETS; ++i)
- INIT_MUTEX (&g_InstanceHash->buckets[i].lock);
- return TRUE;
- }
- else
- return FALSE;
-}
-
-int
-NInstances (VOID)
-{
- int i, n = 0;
-
- if (g_InstanceHash)
- {
- for (i = 0; i < N_INSTANCE_BUCKETS; ++i)
- {
- BOOLEAN got_lock;
- INSTANCE_BUCKET *ib = &g_InstanceHash->buckets[i];
- ACQUIRE_MUTEX_ADAPTIVE (&ib->lock, got_lock);
-
- if (got_lock)
- {
- INSTANCE *current;
- for (current = ib->list; current != NULL; current = current->next)
- ++n;
- RELEASE_MUTEX (&ib->lock);
- }
- else
- return -1;
- }
- }
-
- return n;
-}
-
-int
-InstanceMaxBucketSize (VOID)
-{
- int i, n = 0;
-
- if (g_InstanceHash)
- {
- for (i = 0; i < N_INSTANCE_BUCKETS; ++i)
- {
- BOOLEAN got_lock;
- int bucket_size = 0;
- INSTANCE_BUCKET *ib = &g_InstanceHash->buckets[i];
- ACQUIRE_MUTEX_ADAPTIVE (&ib->lock, got_lock);
-
- if (got_lock)
- {
- INSTANCE *current;
- for (current = ib->list; current != NULL; current = current->next)
- ++bucket_size;
- if (bucket_size > n)
- n = bucket_size;
- RELEASE_MUTEX (&ib->lock);
- }
- else
- return -1;
- }
- }
-
- return n;
-}
-
-VOID
-FreeInstanceList (VOID)
-{
- if (g_InstanceHash)
- {
- MYASSERT (NInstances() == 0);
- MemFree (g_InstanceHash, sizeof (INSTANCE_HASH));
- g_InstanceHash = NULL;
- }
-}
-
-BOOLEAN
-AddAdapterToInstanceList (TapAdapterPointer p_Adapter)
-{
- BOOLEAN got_lock;
- BOOLEAN ret = FALSE;
- const int hash = InstanceHashValue(INSTANCE_KEY(p_Adapter));
- INSTANCE_BUCKET *ib = &g_InstanceHash->buckets[hash];
-
- DEBUGP (("[TAP] AddAdapterToInstanceList hash=%d\n", hash));
-
- ACQUIRE_MUTEX_ADAPTIVE (&ib->lock, got_lock);
-
- if (got_lock)
- {
- INSTANCE *i = MemAlloc (sizeof (INSTANCE), FALSE);
- if (i)
- {
- MYASSERT (p_Adapter);
- i->m_Adapter = p_Adapter;
- i->next = ib->list;
- ib->list = i;
- ret = TRUE;
- }
- RELEASE_MUTEX (&ib->lock);
- }
-
- return ret;
-}
-
-BOOLEAN
-RemoveAdapterFromInstanceList (TapAdapterPointer p_Adapter)
-{
- BOOLEAN got_lock;
- BOOLEAN ret = FALSE;
- INSTANCE_BUCKET *ib = &g_InstanceHash->buckets[InstanceHashValue(INSTANCE_KEY(p_Adapter))];
-
- ACQUIRE_MUTEX_ADAPTIVE (&ib->lock, got_lock);
-
- if (got_lock)
- {
- INSTANCE *current, *prev=NULL;
- for (current = ib->list; current != NULL; current = current->next)
- {
- if (current->m_Adapter == p_Adapter) // found match
- {
- if (prev)
- prev->next = current->next;
- else
- ib->list = current->next;
- MemFree (current->m_Adapter, sizeof (TapAdapter));
- MemFree (current, sizeof (INSTANCE));
- ret = TRUE;
- break;
- }
- prev = current;
- }
- RELEASE_MUTEX (&ib->lock);
- }
-
- return ret;
-}
-
-TapAdapterPointer
-LookupAdapterInInstanceList (PDEVICE_OBJECT p_DeviceObject)
-{
- BOOLEAN got_lock;
- TapAdapterPointer ret = NULL;
- INSTANCE_BUCKET *ib = &g_InstanceHash->buckets[InstanceHashValue((PVOID)p_DeviceObject)];
-
- ACQUIRE_MUTEX_ADAPTIVE (&ib->lock, got_lock);
-
- if (got_lock)
- {
- INSTANCE *current, *prev=NULL;
- for (current = ib->list; current != NULL; current = current->next)
- {
- if (p_DeviceObject == INSTANCE_KEY (current->m_Adapter)) // found match
- {
- // move it to head of list
- if (prev)
- {
- prev->next = current->next;
- current->next = ib->list;
- ib->list = current;
- }
- ret = ib->list->m_Adapter;
- break;
- }
- prev = current;
- }
- RELEASE_MUTEX (&ib->lock);
- }
-
- return ret;
-}