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proxyid.go
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proxyid.go
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// SPDX-License-Identifier: Apache-2.0
// Copyright Authors of Cilium
package policy
import (
"fmt"
"strconv"
"strings"
"github.com/cilium/cilium/pkg/policy/trafficdirection"
"github.com/cilium/cilium/pkg/u8proto"
)
// ProxyID returns a unique string to identify a proxy mapping.
func ProxyID(endpointID uint16, ingress bool, protocol string, port uint16) string {
direction := "egress"
if ingress {
direction = "ingress"
}
return strconv.FormatUint(uint64(endpointID), 10) + ":" + direction + ":" + protocol + ":" + strconv.FormatUint(uint64(port), 10)
}
// ProxyIDFromKey returns a unique string to identify a proxy mapping.
func ProxyIDFromKey(endpointID uint16, key Key) string {
return ProxyID(endpointID, key.TrafficDirection == trafficdirection.Ingress.Uint8(), u8proto.U8proto(key.Nexthdr).String(), key.DestPort)
}
// ParseProxyID parses a proxy ID returned by ProxyID and returns its components.
func ParseProxyID(proxyID string) (endpointID uint16, ingress bool, protocol string, port uint16, err error) {
comps := strings.Split(proxyID, ":")
if len(comps) != 4 {
err = fmt.Errorf("invalid proxy ID structure: %s", proxyID)
return
}
epID, err := strconv.ParseUint(comps[0], 10, 16)
if err != nil {
return
}
endpointID = uint16(epID)
ingress = comps[1] == "ingress"
protocol = comps[2]
l4port, err := strconv.ParseUint(comps[3], 10, 16)
if err != nil {
return
}
port = uint16(l4port)
return
}