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- Move the DstAddress check above the NCE modification code so we don't use ARP requests that aren't addressed to us

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- Fixes bug 4879

svn path=/trunk/; revision=43692
This commit is contained in:
Cameron Gutman
2009-10-22 19:08:02 +00:00
parent 80078ade2b
commit 0fba4d8f11
1 changed files with 5 additions and 4 deletions
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reactos/lib/drivers/ip/network/arp.c
+5 -4
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@@ -212,11 +212,13 @@ VOID ARPReceive(
SenderProtoAddress = (PVOID)((ULONG_PTR)SenderHWAddress + Header->HWAddrLen);
TargetProtoAddress = (PVOID)((ULONG_PTR)SenderProtoAddress + Header->ProtoAddrLen + Header->HWAddrLen);
/* Check if we know the sender */
AddrInitIPv4(&DstAddress, *((PULONG)TargetProtoAddress));
if (!AddrIsEqual(&DstAddress, &Interface->Unicast))
return;
AddrInitIPv4(&SrcAddress, *((PULONG)SenderProtoAddress));
AddrInitIPv4(&DstAddress, *((PULONG)TargetProtoAddress));
/* Check if we know the sender */
NCE = NBLocateNeighbor(&SrcAddress);
if (NCE) {
/* We know the sender. Update the hardware address
@@ -230,8 +232,7 @@ VOID ARPReceive(
Header->HWAddrLen, 0, ARP_TIMEOUT);
}
if (Header->Opcode != ARP_OPCODE_REQUEST ||
!AddrIsEqual(&DstAddress, &Interface->Unicast))
if (Header->Opcode != ARP_OPCODE_REQUEST)
return;
/* This is a request for our address. Swap the addresses and