fix offset again

Author: lakshk98

pkg/plugin/ebpfwindows/datapath_drop_windows.go

@@ -29,7 +29,7 @@ var dropNotifyLengthFromVersion = map[uint16]uint{
 	DropNotifyVersion1: dropNotifyV1Len,
 }
 
-var PktmonDropNotifyLengthFromVersion = map[uint16]uint{
+var pktmonDropNotifyLengthFromVersion = map[uint16]uint{
 	DropNotifyVersion1: dropPktmonNotifyV1Len, // retain backwards compatibility for testing.
 }
 
@@ -104,7 +104,7 @@ func DecodePktmonDrop(data []byte, pdn *PktmonDropNotify) error {
 // DataOffset returns the offset from the beginning of PktmonDropNotify where the
 // notification data begins.
 func (n *PktmonDropNotify) DataOffset() uint {
-	return dropNotifyLengthFromVersion[n.VersionHeader.Version]
+	return pktmonDropNotifyLengthFromVersion[n.VersionHeader.Version]
 }
 
 func (n *PktmonDropNotify) decodePktmonDrop(data []byte) error {

test/e2e/tools/event-writer/bpf_event_writer.c

@@ -133,6 +133,7 @@ void create_pktmon_drop_event(pktmon_notify_t* pktmon_drp_elm)
 {
     memset(pktmon_drp_elm, 0, sizeof(pktmon_notify_t));
     pktmon_drp_elm->version_header.type       = PKTMON_NOTIFY_DROP;
+    pktmon_drp_elm->version_header.version    = 1;
     pktmon_drp_elm->pktmon_header.metadata.drop_reason = 7;
 }