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|
package firewall
import (
"encoding/json"
"fmt"
"github.com/slackhq/nebula/iputil"
)
type m map[string]interface{}
const (
ProtoAny = 0 // When we want to handle HOPOPT (0) we can change this, if ever
ProtoTCP = 6
ProtoUDP = 17
ProtoICMP = 1
PortAny = 0 // Special value for matching `port: any`
PortFragment = -1 // Special value for matching `port: fragment`
)
type Packet struct {
LocalIP iputil.VpnIp
RemoteIP iputil.VpnIp
LocalPort uint16
RemotePort uint16
Protocol uint8
Fragment bool
}
func (fp *Packet) Copy() *Packet {
return &Packet{
LocalIP: fp.LocalIP,
RemoteIP: fp.RemoteIP,
LocalPort: fp.LocalPort,
RemotePort: fp.RemotePort,
Protocol: fp.Protocol,
Fragment: fp.Fragment,
}
}
func (fp Packet) MarshalJSON() ([]byte, error) {
var proto string
switch fp.Protocol {
case ProtoTCP:
proto = "tcp"
case ProtoICMP:
proto = "icmp"
case ProtoUDP:
proto = "udp"
default:
proto = fmt.Sprintf("unknown %v", fp.Protocol)
}
return json.Marshal(m{
"LocalIP": fp.LocalIP.String(),
"RemoteIP": fp.RemoteIP.String(),
"LocalPort": fp.LocalPort,
"RemotePort": fp.RemotePort,
"Protocol": proto,
"Fragment": fp.Fragment,
})
}
|
