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-rw-r--r--pkg/tcpip/header/ipv4.go5
1 files changed, 5 insertions, 0 deletions
diff --git a/pkg/tcpip/header/ipv4.go b/pkg/tcpip/header/ipv4.go
index 1b882d3d8..c3b8fb00e 100644
--- a/pkg/tcpip/header/ipv4.go
+++ b/pkg/tcpip/header/ipv4.go
@@ -211,6 +211,11 @@ func (b IPv4) SetFlagsFragmentOffset(flags uint8, offset uint16) {
binary.BigEndian.PutUint16(b[flagsFO:], v)
}
+// SetID sets the identification field.
+func (b IPv4) SetID(v uint16) {
+ binary.BigEndian.PutUint16(b[id:], v)
+}
+
// SetSourceAddress sets the "source address" field of the ipv4 header.
func (b IPv4) SetSourceAddress(addr tcpip.Address) {
copy(b[srcAddr:srcAddr+IPv4AddressSize], addr)