forked from cisco-app-networking/networkservicemesh
/
helpers.go
86 lines (77 loc) · 2.42 KB
/
helpers.go
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// Copyright 2018, 2019 VMware, Inc.
// SPDX-License-Identifier: Apache-2.0
//
// 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 common
import (
"encoding/binary"
"net"
"os"
"path"
"strings"
"cisco-app-networking.github.io/networkservicemesh/controlplane/api/connection/mechanisms/common"
"github.com/sirupsen/logrus"
"cisco-app-networking.github.io/networkservicemesh/controlplane/api/connection"
"cisco-app-networking.github.io/networkservicemesh/controlplane/api/connection/mechanisms/kernel"
"cisco-app-networking.github.io/networkservicemesh/controlplane/api/connection/mechanisms/memif"
"cisco-app-networking.github.io/networkservicemesh/pkg/tools"
)
func getEnv(key, description string, mandatory bool) string {
value, ok := os.LookupEnv(key)
if !ok {
if mandatory {
logrus.Fatalf("Error getting %v: %v", key, ok)
} else {
logrus.Infof("%v not found.", key)
return ""
}
}
logrus.Infof("%s: %s", description, value)
return value
}
// Ip2int converts and IP address to 32-bit unsignet integer
func Ip2int(ip net.IP) uint32 {
if ip == nil {
return 0
}
if len(ip) == 16 {
return binary.BigEndian.Uint32(ip[12:16])
}
return binary.BigEndian.Uint32(ip)
}
// IsIPv6 function to check whether an IP is IPv6 or IPv4
func IsIPv6(address string) bool {
return strings.Count(address, ":") >= 2
}
// NewMechanism creates a new mechanism with passed type and description.
func NewMechanism(cls string, t string, name, description string) (*connection.Mechanism, error) {
inodeNum, err := tools.GetCurrentNS()
if err != nil {
return nil, err
}
rv := &connection.Mechanism{
Cls: cls,
Type: t,
Parameters: map[string]string{
common.InterfaceNameKey: name,
common.InterfaceDescriptionKey: description,
kernel.SocketFilename: path.Join(name, memif.MemifSocket),
common.NetNsInodeKey: inodeNum,
},
}
err = rv.IsValid()
if err != nil {
return nil, err
}
return rv, nil
}