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|
package driver
import (
"fmt"
"github.com/jsimonetti/rtnetlink/v2"
"github.com/mdlayher/netlink"
)
const veth_info_peer = 0x1
// Veth implements LinkDriverVerifier for the veth driver
type Veth struct {
PeerInfo *rtnetlink.LinkMessage // Specifies peer link information
}
var _ rtnetlink.LinkDriverVerifier = &Veth{}
func (v *Veth) New() rtnetlink.LinkDriver {
return &Veth{}
}
func (v *Veth) Encode(ae *netlink.AttributeEncoder) error {
b, err := v.PeerInfo.MarshalBinary()
if err != nil {
return err
}
ae.Bytes(veth_info_peer, b)
return nil
}
func (v *Veth) Decode(ad *netlink.AttributeDecoder) error {
return nil
}
func (*Veth) Kind() string {
return "veth"
}
const (
eth_min_mtu = 68 // Min IPv4 MTU per RFC791
eth_max_mtu = 65535 // 65535, same as IP_MAX_MTU
)
func (v *Veth) Verify(msg *rtnetlink.LinkMessage) error {
if msg.Attributes != nil && msg.Attributes.MTU > 0 && (msg.Attributes.MTU < eth_min_mtu || msg.Attributes.MTU > eth_max_mtu) {
return fmt.Errorf("invalid MTU value %d, must be between %d %d", msg.Attributes.MTU, eth_min_mtu, eth_max_mtu)
}
return nil
}
|
