// Release
void NullPaFree(SESSION *s)
{
// Validate arguments
NULL_LAN *n;
BLOCK *b;
if (s == NULL || (n = s->PacketAdapter->Param) == NULL)
{
return;
}
n->Halt = true;
Set(n->Event);
WaitThread(n->PacketGeneratorThread, INFINITE);
ReleaseThread(n->PacketGeneratorThread);
LockQueue(n->PacketQueue);
{
while (b = GetNext(n->PacketQueue))
{
FreeBlock(b);
}
}
UnlockQueue(n->PacketQueue);
ReleaseQueue(n->PacketQueue);
ReleaseCancel(n->Cancel);
ReleaseEvent(n->Event);
s->PacketAdapter->Param = NULL;
Free(n);
}
// Release the stack
void FreeNativeStack(NATIVE_STACK *a)
{
// Validate arguments
if (a == NULL)
{
return;
}
if (a->Ipc != NULL && IsZero(&a->CurrentDhcpOptionList, sizeof(a->CurrentDhcpOptionList)) == false)
{
IP dhcp_server;
UINTToIP(&dhcp_server, a->CurrentDhcpOptionList.ServerAddress);
IPCDhcpFreeIP(a->Ipc, &dhcp_server);
SleepThread(200);
}
a->Halt = true;
Cancel(a->Cancel);
Disconnect(a->Sock1);
Disconnect(a->Sock2);
WaitThread(a->MainThread, INFINITE);
ReleaseThread(a->MainThread);
CloseEth(a->Eth);
FreeIPC(a->Ipc);
NsStopIpTablesTracking(a);
ReleaseCancel(a->Cancel);
ReleaseSock(a->Sock1);
ReleaseSock(a->Sock2);
ReleaseCedar(a->Cedar);
Free(a);
}
// Close adapter
void CloseEth(ETH *e)
{
BLOCK *b;
// Validate arguments
if (e == NULL)
{
return;
}
ReleaseCancel(e->Cancel);
if (e->SuAdapter != NULL)
{
// Close SeLow adapter
SuCloseAdapter(e->SuAdapter);
SuFree(e->Su);
}
else
{
// Close SEE adapter
wp->PacketCloseAdapter(e->Adapter);
wp->PacketFreePacket(e->Packet);
wp->PacketFreePacket(e->PutPacket);
}
while (b = GetNext(e->PacketQueue))
{
FreeBlock(b);
}
ReleaseQueue(e->PacketQueue);
Free(e->Name);
Free(e->Title);
Free(e->Buffer);
Free(e);
}
// Close Ethernet adapter
void CloseEth(ETH *e)
{
// Validate arguments
if (e == NULL)
{
return;
}
if (e->Tap != NULL)
{
#ifndef NO_VLAN
FreeTap(e->Tap);
#endif // NO_VLAN
}
#ifdef BRIDGE_PCAP
{
struct CAPTUREBLOCK *block;
pcap_breakloop(e->Pcap);
WaitThread(e->CaptureThread, INFINITE);
ReleaseThread(e->CaptureThread);
pcap_close(e->Pcap);
while (block = GetNext(e->Queue)){
Free(block->Buf);
FreeCaptureBlock(block);
}
ReleaseQueue(e->Queue);
}
#endif // BRIDGE_PCAP
#ifdef BRIDGE_BPF
#ifdef BRIDGE_BPF_THREAD
{
struct CAPTUREBLOCK *block;
int fd = e->Socket;
e->Socket = INVALID_SOCKET;
WaitThread(e->CaptureThread, INFINITE);
ReleaseThread(e->CaptureThread);
e->Socket = fd; // restore to close after
while (block = GetNext(e->Queue)){
Free(block->Buf);
FreeCaptureBlock(block);
}
ReleaseQueue(e->Queue);
}
#else // BRIDGE_BPF_THREAD
Free(e->Buffer);
#endif // BRIDGE_BPF_THREAD
#endif // BRIDGE_BPF
ReleaseCancel(e->Cancel);
Free(e->Name);
Free(e->Title);
// Restore MTU value
EthSetMtu(e, 0);
if (e->Socket != INVALID_SOCKET)
{
#if defined(BRIDGE_BPF) || defined(BRIDGE_PCAP) || defined(UNIX_SOLARIS)
close(e->Socket);
#else // BRIDGE_PCAP
closesocket(e->Socket);
#endif // BRIDGE_PCAP
#if defined(BRIDGE_BPF) || defined(UNIX_SOLARIS)
if (e->SocketBsdIf != INVALID_SOCKET)
{
close(e->SocketBsdIf);
}
#endif // BRIDGE_BPF || UNIX_SOLARIS
}
Free(e);
}
// SecureNAT server-side thread
void SnSecureNATThread(THREAD *t, void *param)
{
SNAT *s;
CONNECTION *c;
SESSION *se;
POLICY *policy;
HUB *h;
// Validate arguments
if (t == NULL || param == NULL)
{
return;
}
s = (SNAT *)param;
// Create a server connection
c = NewServerConnection(s->Cedar, NULL, t);
c->Protocol = CONNECTION_HUB_SECURE_NAT;
// Apply the default policy
policy = ClonePolicy(GetDefaultPolicy());
// Not to limit the number of broadcast
policy->NoBroadcastLimiter = true;
h = s->Hub;
AddRef(h->ref);
// create a server session
se = NewServerSession(s->Cedar, c, s->Hub, SNAT_USER_NAME, policy);
se->SecureNATMode = true;
se->SecureNAT = s;
c->Session = se;
ReleaseConnection(c);
HLog(se->Hub, "LH_NAT_START", se->Name);
// User name
se->Username = CopyStr(SNAT_USER_NAME_PRINT);
s->Session = se;
AddRef(se->ref);
// Notification initialization completion
NoticeThreadInit(t);
ReleaseCancel(s->Nat->Virtual->Cancel);
s->Nat->Virtual->Cancel = se->Cancel1;
AddRef(se->Cancel1->ref);
if (s->Nat->Virtual->NativeNat != NULL)
{
CANCEL *old_cancel = NULL;
Lock(s->Nat->Virtual->NativeNat->CancelLock);
{
if (s->Nat->Virtual->NativeNat->Cancel != NULL)
{
old_cancel = s->Nat->Virtual->NativeNat->Cancel;
s->Nat->Virtual->NativeNat->Cancel = se->Cancel1;
AddRef(se->Cancel1->ref);
}
}
Unlock(s->Nat->Virtual->NativeNat->CancelLock);
if (old_cancel != NULL)
{
ReleaseCancel(old_cancel);
}
}
// Main function of the session
Debug("SecureNAT Start.\n");
SessionMain(se);
Debug("SecureNAT Stop.\n");
HLog(se->Hub, "LH_NAT_STOP");
ReleaseHub(h);
ReleaseSession(se);
}