fix #1399: don't assert the oidlength returned from the network card driver, but simply return that the PacketRequest call failed in that case.

BTW: this is a serious bug in the specific network card driver of this report, it returned a buffer length LONGER than the provided buffer length one!

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@20923 f5534014-38df-0310-8fa8-9805f1628bb7

1 files changed, 11 insertions, 4 deletions

diff --git a/capture_wpcap_packet.c b/capture_wpcap_packet.c
index fe9438fbc4..4b58cd37c4 100644
--- a/capture_wpcap_packet.c
+++ b/capture_wpcap_packet.c
@@ -242,9 +242,10 @@ wpcap_packet_request(void *adapter, ULONG Oid, int set, char *value, unsigned in
         return 0;
     }
 
+	/* get a buffer suitable for PacketRequest() */
     OidData=GlobalAllocPtr(GMEM_MOVEABLE | GMEM_ZEROINIT,IoCtlBufferLength);
     if (OidData == NULL) {
-        g_warning("packet_link_status failed\n");
+        g_warning("GlobalAllocPtr failed for %u\n", IoCtlBufferLength);
         return 0;
     }
 
@@ -255,9 +256,15 @@ wpcap_packet_request(void *adapter, ULONG Oid, int set, char *value, unsigned in
     Status = p_PacketRequest(adapter, set, OidData);
 
     if(Status) {
-        g_assert(OidData->Length <= *length);
-        memcpy(value, OidData->Data, OidData->Length);
-        *length = OidData->Length;
+		if(OidData->Length <= *length) {
+			/* copy value from driver */
+			memcpy(value, OidData->Data, OidData->Length);
+			*length = OidData->Length;
+		} else {
+			/* the driver returned a value that is longer than expected (and longer than the given buffer) */
+			g_warning("returned oid too long, Oid: 0x%x OidLen:%u MaxLen:%u", Oid, OidData->Length, *length);
+			Status = FALSE;
+		}
     }
 
     GlobalFreePtr (OidData);