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// Copyright (c) 2018 Cisco and/or its affiliates.
//
// 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.
// union-example is an example to show how to use unions in VPP binary API.
package main
import (
"fmt"
"git.fd.io/govpp.git/codec"
"git.fd.io/govpp.git/examples/binapi/interfaces"
"git.fd.io/govpp.git/examples/binapi/ip"
"git.fd.io/govpp.git/examples/binapi/ip_types"
"log"
"reflect"
)
func init() {
log.SetFlags(0)
}
func main() {
constructExample()
encodingExampleIP()
// convert IP from string form into Address type containing union
convertIP("10.10.1.1")
convertIP("ff80::1")
// convert IP from string form into Prefix type
convertIPPrefix("20.10.1.1/24")
convertIPPrefix("21.10.1.1")
convertIPPrefix("ff90::1/64")
convertIPPrefix("ff91::1")
// convert MAC address from string into MacAddress
convertToMacAddress("00:10:ab:4f:00:01")
}
func constructExample() {
var union ip_types.AddressUnion
// create AddressUnion with AdressUnionXXX constructors
union = ip_types.AddressUnionIP4(ip_types.IP4Address{192, 168, 1, 10})
union = ip_types.AddressUnionIP6(ip_types.IP6Address{0xff, 0x02, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x02})
// set AddressUnion with SetXXX methods
union.SetIP4(ip_types.IP4Address{192, 168, 1, 10})
union.SetIP6(ip_types.IP6Address{0xff, 0x02, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x02})
}
func encodingExampleIP() {
var c = codec.DefaultCodec
// encode this message
var msg = ip.IPPuntRedirect{
Punt: ip.PuntRedirect{
Nh: ip_types.Address{
Af: ip_types.ADDRESS_IP4,
Un: ip_types.AddressUnionIP4(ip_types.IP4Address{192, 168, 1, 10}),
},
},
IsAdd: true,
}
log.Printf("encoding message: %+v", msg)
b, err := c.EncodeMsg(&msg, 1)
if err != nil {
log.Fatal(err)
}
// decode into this message
var msg2 ip.IPPuntRedirect
if err := c.DecodeMsg(b, &msg2); err != nil {
log.Fatal(err)
}
log.Printf("decoded message: %+v", msg2)
// compare the messages
if !reflect.DeepEqual(msg, msg2) {
log.Fatal("messages are not equal")
}
}
func convertIP(ip string) {
addr, err := ip_types.ParseAddress(ip)
if err != nil {
log.Printf("error converting IP to Address: %v", err)
return
}
fmt.Printf("converted IP %q to: %+v\n", ip, addr)
ipStr := addr.ToString()
fmt.Printf("Address converted back to string IP %+v to: %q\n", addr, ipStr)
}
func convertIPPrefix(ip string) {
prefix, err := ip_types.ParsePrefix(ip)
if err != nil {
log.Printf("error converting prefix to IP4Prefix: %v", err)
return
}
fmt.Printf("converted prefix %q to: %+v\n", ip, prefix)
ipStr := prefix.ToString()
fmt.Printf("IP4Prefix converted back to string prefix %+v to: %q\n", prefix, ipStr)
}
func convertToMacAddress(mac string) {
parsedMac, err := interfaces.ParseMAC(mac)
if err != nil {
log.Printf("error converting MAC to MacAddress: %v", err)
return
}
fmt.Printf("converted prefix %q to: %+v\n", mac, parsedMac)
macStr := parsedMac.ToString()
fmt.Printf("MacAddress converted back to string %+v to: %q\n", parsedMac, macStr)
}
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