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-rw-r--r--pkg/tcpip/packet_buffer.go8
1 files changed, 6 insertions, 2 deletions
diff --git a/pkg/tcpip/packet_buffer.go b/pkg/tcpip/packet_buffer.go
index ab24372e7..04852132c 100644
--- a/pkg/tcpip/packet_buffer.go
+++ b/pkg/tcpip/packet_buffer.go
@@ -39,8 +39,12 @@ type PacketBuffer struct {
// payload.
DataSize int
- // Header holds the headers of outbound packets. As a packet is passed
- // down the stack, each layer adds to Header.
+ // Header holds the headers of outbound packets generated by the netstack. As
+ // a packet is passed down the stack, each layer adds to Header.
+ //
+ // Note, if a packet is being forwarded at the IP layer, the headers for the
+ // IP layer and above (transport) will be held in Data as the packet was not
+ // passed down the stack it arrived at before being forwarded.
Header buffer.Prependable
// These fields are used by both inbound and outbound packets. They