[cgutman] 43077: - Changed some behavior from the last neighbor cache rewrite - NCEs are no longer destroyed when they become stale so the hardware address can be saved for direct communication - The route selection code has been changed to choose against stale NCEs if possible
19 Sep
2009
19 Sep
'09
1:39 a.m.
Author: cgutman
Date: Sat Sep 19 03:39:16 2009
New Revision: 43077
URL: http://svn.reactos.org/svn/reactos?rev=43077&view=rev
Log:
- Changed some behavior from the last neighbor cache rewrite
- NCEs are no longer destroyed when they become stale so the hardware address can be
saved for direct communication
- The route selection code has been changed to choose against stale NCEs if possible
Modified:
trunk/reactos/drivers/network/tcpip/include/neighbor.h
trunk/reactos/lib/drivers/ip/network/arp.c
trunk/reactos/lib/drivers/ip/network/ip.c
trunk/reactos/lib/drivers/ip/network/neighbor.c
trunk/reactos/lib/drivers/ip/network/router.c
Modified: trunk/reactos/drivers/network/tcpip/include/neighbor.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/network/tcpip/incl…
==============================================================================
--- trunk/reactos/drivers/network/tcpip/include/neighbor.h [iso-8859-1] (original)
+++ trunk/reactos/drivers/network/tcpip/include/neighbor.h [iso-8859-1] Sat Sep 19
03:39:16 2009
@@ -41,11 +41,8 @@
/* NCE states */
#define NUD_INCOMPLETE 0x01
-#define NUD_REACHABLE 0x02
-#define NUD_PERMANENT 0x04
-
-#define NUD_BROADCAST (NUD_PERMANENT | NUD_REACHABLE)
-#define NUD_LOCAL (NUD_PERMANENT | NUD_REACHABLE)
+#define NUD_PERMANENT 0x02
+#define NUD_STALE 0x04
/* Number of seconds before the NCE times out */
#define ARP_TIMEOUT 30
Modified: trunk/reactos/lib/drivers/ip/network/arp.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/drivers/ip/network/arp…
==============================================================================
--- trunk/reactos/lib/drivers/ip/network/arp.c [iso-8859-1] (original)
+++ trunk/reactos/lib/drivers/ip/network/arp.c [iso-8859-1] Sat Sep 19 03:39:16 2009
@@ -215,13 +215,13 @@
if (NCE) {
/* We know the sender. Update the hardware address
and state in our neighbor address cache */
- NBUpdateNeighbor(NCE, SenderHWAddress, NUD_REACHABLE);
+ NBUpdateNeighbor(NCE, SenderHWAddress, 0);
} else {
/* The packet had our protocol address as target. The sender
may want to communicate with us soon, so add his address
to our address cache */
NCE = NBAddNeighbor(Interface, &Address, SenderHWAddress,
- Header->HWAddrLen, NUD_REACHABLE, ARP_TIMEOUT);
+ Header->HWAddrLen, 0, ARP_TIMEOUT);
}
if (Header->Opcode != ARP_OPCODE_REQUEST)
Modified: trunk/reactos/lib/drivers/ip/network/ip.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/drivers/ip/network/ip.…
==============================================================================
--- trunk/reactos/lib/drivers/ip/network/ip.c [iso-8859-1] (original)
+++ trunk/reactos/lib/drivers/ip/network/ip.c [iso-8859-1] Sat Sep 19 03:39:16 2009
@@ -212,7 +212,7 @@
/* Add a permanent neighbor for this NTE */
NCE = NBAddNeighbor(IF, &IF->Unicast,
IF->Address, IF->AddressLength,
- NUD_LOCAL, 0);
+ NUD_PERMANENT, 0);
if (!NCE) {
TI_DbgPrint(MIN_TRACE, ("Could not create NCE.\n"));
return;
Modified: trunk/reactos/lib/drivers/ip/network/neighbor.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/drivers/ip/network/nei…
==============================================================================
--- trunk/reactos/lib/drivers/ip/network/neighbor.c [iso-8859-1] (original)
+++ trunk/reactos/lib/drivers/ip/network/neighbor.c [iso-8859-1] Sat Sep 19 03:39:16 2009
@@ -30,7 +30,7 @@
PNEIGHBOR_PACKET Packet;
UINT HashValue;
- ASSERT(NCE->State & NUD_REACHABLE);
+ ASSERT(!(NCE->State & NUD_INCOMPLETE));
HashValue = *(PULONG)(&NCE->Address.Address);
HashValue ^= HashValue >> 16;
@@ -105,26 +105,22 @@
TcpipAcquireSpinLock(&NeighborCache[i].Lock, &OldIrql);
for (PrevNCE = &NeighborCache[i].Cache;
- (NCE = *PrevNCE) != NULL;) {
+ (NCE = *PrevNCE) != NULL;
+ PrevNCE = &NCE->Next) {
/* Check if event timer is running */
if (NCE->EventTimer > 0) {
+ ASSERT(!(NCE->State & NUD_PERMANENT));
NCE->EventCount++;
if (NCE->EventCount % ARP_RATE == 0)
NBSendSolicit(NCE);
if (NCE->EventTimer - NCE->EventCount == 0) {
- ASSERT(!(NCE->State & NUD_PERMANENT));
-
- /* Flush packet queue */
- NBFlushPacketQueue( NCE, NDIS_STATUS_REQUEST_ABORTED );
-
- *PrevNCE = NCE->Next;
-
- exFreePool(NCE);
-
- continue;
+ DbgPrint("Marking NCE stale: %s\n",
A2S(&NCE->Address));
+
+ NCE->State |= NUD_STALE;
+
+ NCE->EventCount = 0;
}
}
- PrevNCE = &NCE->Next;
}
TcpipReleaseSpinLock(&NeighborCache[i].Lock, OldIrql);
@@ -304,7 +300,7 @@
TcpipReleaseSpinLock(&NeighborCache[HashValue].Lock, OldIrql);
- if( NCE->State & NUD_REACHABLE )
+ if( !(NCE->State & NUD_INCOMPLETE) )
NBSendPackets( NCE );
}
@@ -376,7 +372,7 @@
AddrIsUnspecified(Address) ) {
TI_DbgPrint(MID_TRACE,("Packet targeted at broadcast addr\n"));
NCE = NBAddNeighbor(Interface, Address, NULL,
- Interface->AddressLength, NUD_BROADCAST, 0);
+ Interface->AddressLength, NUD_PERMANENT, 0);
} else {
NCE = NBAddNeighbor(Interface, Address, NULL,
Interface->AddressLength, NUD_INCOMPLETE,
ARP_TIMEOUT);
@@ -430,7 +426,7 @@
TcpipReleaseSpinLock(&NeighborCache[HashValue].Lock, OldIrql);
- if( NCE->State & NUD_REACHABLE )
+ if( !(NCE->State & NUD_INCOMPLETE) )
NBSendPackets( NCE );
return TRUE;
@@ -505,10 +501,10 @@
ArpTable[Size].LogAddr = CurNCE->Address.Address.IPv4Address;
if( CurNCE->State & NUD_PERMANENT )
ArpTable[Size].Type = ARP_ENTRY_STATIC;
- else if( CurNCE->State & NUD_REACHABLE )
+ else if( CurNCE->State & NUD_INCOMPLETE )
+ ArpTable[Size].Type = ARP_ENTRY_INVALID;
+ else
ArpTable[Size].Type = ARP_ENTRY_DYNAMIC;
- else
- ArpTable[Size].Type = ARP_ENTRY_OTHER;
}
Size++;
}
Modified: trunk/reactos/lib/drivers/ip/network/router.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/drivers/ip/network/rou…
==============================================================================
--- trunk/reactos/lib/drivers/ip/network/router.c [iso-8859-1] (original)
+++ trunk/reactos/lib/drivers/ip/network/router.c [iso-8859-1] Sat Sep 19 03:39:16 2009
@@ -274,7 +274,8 @@
TI_DbgPrint(DEBUG_ROUTER,("This-Route: %s (Sharing %d bits)\n",
A2S(&NCE->Address), Length));
- if(Length >= MaskLength && (Length > BestLength || !BestLength)) {
+ if(Length >= MaskLength && (Length > BestLength || !BestLength)
&&
+ (!(State & NUD_STALE) || !BestState)) {
/* This seems to be a better router */
BestNCE = NCE;
BestLength = Length;
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