/
util.go
81 lines (69 loc) · 2.5 KB
/
util.go
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// Copyright 2021 Antrea Authors
//
// 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 main
import (
"fmt"
"net"
"strconv"
"strings"
"antrea.io/antrea/pkg/agent/util"
)
var getAllNodeAddresses = util.GetAllNodeAddresses
func getAvailableNodePortAddresses(nodePortAddressesFromConfig []string, excludeDevices []string) ([]net.IP, []net.IP, error) {
// Get all IP addresses of Node
nodeAddressesIPv4, nodeAddressesIPv6, err := getAllNodeAddresses(excludeDevices)
if err != nil {
return nil, nil, err
}
// If option `NodePortAddresses` is not set, then all Node IP addresses will be used as NodePort IP address.
if len(nodePortAddressesFromConfig) == 0 {
return nodeAddressesIPv4, nodeAddressesIPv6, nil
}
var nodePortIPNets []*net.IPNet
for _, nodePortIP := range nodePortAddressesFromConfig {
_, ipNet, _ := net.ParseCIDR(nodePortIP)
nodePortIPNets = append(nodePortIPNets, ipNet)
}
var nodePortAddressesIPv4, nodePortAddressesIPv6 []net.IP
for _, nodePortIPNet := range nodePortIPNets {
for i := range nodeAddressesIPv4 {
if nodePortIPNet.Contains(nodeAddressesIPv4[i]) {
nodePortAddressesIPv4 = append(nodePortAddressesIPv4, nodeAddressesIPv4[i])
}
}
for i := range nodeAddressesIPv6 {
if nodePortIPNet.Contains(nodeAddressesIPv6[i]) {
nodePortAddressesIPv6 = append(nodePortAddressesIPv6, nodeAddressesIPv6[i])
}
}
}
return nodePortAddressesIPv4, nodePortAddressesIPv6, nil
}
// parsePortRange parses a port range ("<start>-<end>") and checks that it is valid.
func parsePortRange(portRangeStr string) (start, end int, err error) {
portsRange := strings.Split(portRangeStr, "-")
if len(portsRange) != 2 {
return 0, 0, fmt.Errorf("wrong port range format: %s", portRangeStr)
}
if start, err = strconv.Atoi(portsRange[0]); err != nil {
return 0, 0, err
}
if end, err = strconv.Atoi(portsRange[1]); err != nil {
return 0, 0, err
}
if end <= start {
return 0, 0, fmt.Errorf("start port must be smaller than end port: %s", portRangeStr)
}
return start, end, nil
}