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Clarify comments about IHL in ipv4.go. 

PiperOrigin-RevId: 300668506
This commit is contained in:
Eyal Soha 2020-03-12 18:38:41 -07:00 committed by gVisor bot
parent bbf86003bf
commit f693e1334b
1 changed files with 3 additions and 2 deletions
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5
pkg/tcpip/header/ipv4.go
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@ -38,7 +38,8 @@ const (
// IPv4Fields contains the fields of an IPv4 packet. It is used to describe the
// fields of a packet that needs to be encoded.
type IPv4Fields struct {
// IHL is the "internet header length" field of an IPv4 packet.
// IHL is the "internet header length" field of an IPv4 packet. The value
// is in bytes.
IHL uint8
// TOS is the "type of service" field of an IPv4 packet.
@ -138,7 +139,7 @@ func IPVersion(b []byte) int {
}
// HeaderLength returns the value of the "header length" field of the ipv4
// header.
// header. The length returned is in bytes.
func (b IPv4) HeaderLength() uint8 {
return (b[versIHL] & 0xf) * 4
}