mirror of
https://github.com/openziti/ziti.git
synced 2026-10-14 16:19:57 +00:00
Andrew M
3087972172
- remove old JSON schema, unsused code - remove unused variables from base router functions - rework all API entities - rework all links - fix lint issues - adds error conversion logic - update tests as needed - fix up go test - fix backwards compat w/ non json enroller
48 lines
1.2 KiB
Go
48 lines
1.2 KiB
Go
/*
|
|
Copyright NetFoundry, Inc.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
https://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package ip
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
)
|
|
|
|
// Parse a layer 3 packet (ipv4 or ipv6), and return
|
|
// - src, dst IP addresses,
|
|
// - layer 4 protocol
|
|
// - payload
|
|
// - error
|
|
func Decode(packet []byte) (net.IP, net.IP, int, []byte, error) {
|
|
var l4Proto int
|
|
var payload []byte
|
|
var src, dst net.IP
|
|
|
|
ipVersion := packet[0] >> 4
|
|
switch ipVersion {
|
|
case 4:
|
|
h := IPv4(packet)
|
|
src = h.SourceAddress()
|
|
dst = h.DestinationAddress()
|
|
l4Proto = int(h.Protocol())
|
|
payload = h.Payload()
|
|
default:
|
|
return nil, nil, 0, nil, fmt.Errorf("unsupported IP version %d", ipVersion)
|
|
}
|
|
|
|
return src, dst, l4Proto, payload, nil
|
|
}
|