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authorBhasker Hariharan <bhaskerh@google.com>2020-08-25 14:45:03 -0700
committerAndrei Vagin <avagin@gmail.com>2020-09-09 17:53:10 -0700
commit09bd5a57f3456bb411c34cced923531dc8e0aec7 (patch)
treee6871825076dd5d67c49d12ee5e8adc650cb16b1
parente6a1608bc71308fecf951970f17db0bba2611ff0 (diff)
Clarify comment on NetworkProtocolNumber.
The actual values used for this field in Netstack are actually EtherType values of the protocol in an Ethernet frame. Eg. header.IPv4ProtocolNumber is 0x0800 and not the number of the IPv4 Protocol Number itself which is 4. Similarly header.IPv6ProtocolNumber is set to 0x86DD whereas the IPv6 protocol number is 41. See: - https://www.iana.org/assignments/ieee-802-numbers/ieee-802-numbers.xhtml (For EtherType) - https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml (For ProtocolNumbers) PiperOrigin-RevId: 328407293
-rw-r--r--pkg/tcpip/tcpip.go5
1 files changed, 4 insertions, 1 deletions
diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go
index 44f87e007..609b8af33 100644
--- a/pkg/tcpip/tcpip.go
+++ b/pkg/tcpip/tcpip.go
@@ -1029,7 +1029,10 @@ func (r Route) String() string {
// TransportProtocolNumber is the number of a transport protocol.
type TransportProtocolNumber uint32
-// NetworkProtocolNumber is the number of a network protocol.
+// NetworkProtocolNumber is the EtherType of a network protocol in an Ethernet
+// frame.
+//
+// See: https://www.iana.org/assignments/ieee-802-numbers/ieee-802-numbers.xhtml
type NetworkProtocolNumber uint32
// A StatCounter keeps track of a statistic.