| /* |
| * Copyright 2020-present Open Networking Foundation |
| * |
| * 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 |
| * |
| * http://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 adaptercoreonu provides the utility for onu devices, flows and statistics |
| package adaptercoreonu |
| |
| import ( |
| "encoding/binary" |
| "errors" |
| "net" |
| "regexp" |
| "strconv" |
| "strings" |
| ) |
| |
| // GetTpIDFromTpPath extracts TpID from the TpPath. |
| // On success it returns a valid TpID and nil error. |
| // On failure it returns TpID as 0 and the error. |
| func GetTpIDFromTpPath(tpPath string) (uint8, error) { |
| // tpPath is of the format <technology>/<table_id>/olt-{}/pon-{}/onu-{}/uni-{} |
| // A sample tpPath is ==> XGS-PON/64/olt-{12345abcd}/pon-{0}/onu-{1}/uni-{1} |
| var tpPathFormat = regexp.MustCompile(`^[a-zA-Z\-_]+/[0-9]+/olt-{[a-z0-9\-]+}/pon-{[0-9]+}/onu-{[0-9]+}/uni-{[0-9]+}$`) |
| |
| // Ensure tpPath is of the format <technology>/<table_id>/<uni_port_name> |
| if !tpPathFormat.Match([]byte(tpPath)) { |
| return 0, errors.New("tp-path-not-confirming-to-format") |
| } |
| // Extract the TP table-id field. |
| tpID, err := strconv.Atoi(strings.Split(tpPath, "/")[1]) |
| // Atoi returns uint64 and need to be type-casted to uint8 as tpID is uint8 size. |
| return uint8(tpID), err |
| } |
| |
| //IPToInt32 transforms an IP of net.Ip type to int32 |
| func IPToInt32(ip net.IP) uint32 { |
| if len(ip) == 16 { |
| return binary.BigEndian.Uint32(ip[12:16]) |
| } |
| return binary.BigEndian.Uint32(ip) |
| } |