[cgutman] 42375: Broadcast fixes - Treat 255.255.255.255 as an undefined address - Choose the first interface when sending a broadcast packet (fixes failing with STATUS_NETWORK_UNREACHABLE when trying to send a broadcast packet) - Fix a broadcast address check so 255.255.255.255 will also pass (fixes sending queued broadcast packets) - Now a broadcast packet can be successfully sent from an interface with a valid IP address (previously they could only be sent when the interface didn't have an NC

Author: cgutman
Date: Mon Aug  3 22:10:47 2009
New Revision: 42375

URL: http://svn.reactos.org/svn/reactos?rev=42375&view=rev
Log:
Broadcast fixes
 - Treat 255.255.255.255 as an undefined address
 - Choose the first interface when sending a broadcast packet (fixes failing with
STATUS_NETWORK_UNREACHABLE when trying to send a broadcast packet)
 - Fix a broadcast address check so 255.255.255.255 will also pass (fixes sending queued
broadcast packets)
 - Now a broadcast packet can be successfully sent from an interface with a valid IP
address (previously they could only be sent when the interface didn't have an NCE
entry)

Modified:
    trunk/reactos/lib/drivers/ip/network/address.c
    trunk/reactos/lib/drivers/ip/network/interface.c
    trunk/reactos/lib/drivers/ip/network/neighbor.c

Modified: trunk/reactos/lib/drivers/ip/network/address.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/drivers/ip/network/add…
==============================================================================
--- trunk/reactos/lib/drivers/ip/network/address.c [iso-8859-1] (original)
+++ trunk/reactos/lib/drivers/ip/network/address.c [iso-8859-1] Mon Aug  3 22:10:47 2009
@@ -122,7 +122,8 @@
 {
     switch (Address->Type) {
         case IP_ADDRESS_V4:
-            return (Address->Address.IPv4Address == 0);
+            return (Address->Address.IPv4Address == 0 ||
+                    Address->Address.IPv4Address == 0xFFFFFFFF);
 
         case IP_ADDRESS_V6:
         /* FIXME: IPv6 is not supported */

Modified: trunk/reactos/lib/drivers/ip/network/interface.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/drivers/ip/network/int…
==============================================================================
--- trunk/reactos/lib/drivers/ip/network/interface.c [iso-8859-1] (original)
+++ trunk/reactos/lib/drivers/ip/network/interface.c [iso-8859-1] Mon Aug  3 22:10:47
2009
@@ -152,6 +152,26 @@
     return TRUE;
 }
 
+static PIP_INTERFACE GetDefaultInterface(VOID)
+{
+   KIRQL OldIrql;
+   IF_LIST_ITER(CurrentIF);
+
+   TcpipAcquireSpinLock(&InterfaceListLock, &OldIrql);
+   ForEachInterface(CurrentIF) {
+      if (CurrentIF->Context) {
+          TcpipReleaseSpinLock(&InterfaceListLock, OldIrql);
+          return CurrentIF;
+      }
+   } EndFor(CurrentIF);
+   TcpipReleaseSpinLock(&InterfaceListLock, OldIrql);
+
+   /* There are no physical interfaces on the system
+    * so we must pick the loopback interface */
+
+   return Loopback;
+}
+
 PIP_INTERFACE FindOnLinkInterface(PIP_ADDRESS Address)
 /*
  * FUNCTION: Checks all on-link prefixes to find out if an address is on-link
@@ -166,6 +186,9 @@
 
     TI_DbgPrint(DEBUG_ROUTER, ("Called. Address (0x%X)\n", Address));
     TI_DbgPrint(DEBUG_ROUTER, ("Address (%s)\n", A2S(Address)));
+
+    if (AddrIsUnspecified(Address))
+        return GetDefaultInterface();
 
     TcpipAcquireSpinLock(&InterfaceListLock, &OldIrql);
 

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] Mon Aug  3 22:10:47 2009
@@ -421,7 +421,8 @@
   if (NCE == NULL)
     {
         TI_DbgPrint(MID_TRACE,("BCAST: %s\n",
A2S(&Interface->Broadcast)));
-        if( AddrIsEqual(Address, &Interface->Broadcast) ) {
+        if( AddrIsEqual(Address, &Interface->Broadcast) ||
+            AddrIsUnspecified(Address) ) {
             TI_DbgPrint(MID_TRACE,("Packet targeted at broadcast addr\n"));
             NCE = NBAddNeighbor(Interface, Address, NULL,
                                 Interface->AddressLength, NUD_CONNECTED);