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defs.go
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defs.go
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// Copyright 2020 Anapaya Systems
//
// 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 bwallocation
import (
"bytes"
"fmt"
"strconv"
"strings"
"github.com/scionproto/scion/go/lib/addr"
"github.com/scionproto/scion/go/lib/serrors"
)
// Link represents a link from a leaf AS to the provider.
type Link struct {
IA addr.IA
Interface uint64
}
func (l *Link) UnmarshalText(text []byte) error {
parts := bytes.Split(text, []byte("#"))
if len(parts) != 2 {
return serrors.New("invalid link", "input", string(text))
}
ia, err := addr.IAFromString(string(parts[0]))
if err != nil {
return serrors.WrapStr("invalid link: failed to parse ISD-AS", err)
}
intf, err := strconv.ParseUint(string(parts[1]), 10, 64)
if err != nil {
return serrors.WrapStr("invalid link: failed to parse interface", err)
}
*l = Link{
IA: ia,
Interface: uint64(intf),
}
return nil
}
func (l Link) MarshalText() (text []byte, err error) {
return []byte(l.String()), nil
}
func (l Link) String() string {
return fmt.Sprintf("%s#%d", l.IA, l.Interface)
}
// Bandwidth is the bandwidth in bps
type Bandwidth uint64
func (b *Bandwidth) UnmarshalText(text []byte) error {
factor := uint64(1)
raw := string(text)
switch {
case strings.HasSuffix(raw, "gbps"):
raw, factor = strings.TrimSuffix(raw, "gbps"), 1e9
case strings.HasSuffix(raw, "mbps"):
raw, factor = strings.TrimSuffix(raw, "mbps"), 1e6
case strings.HasSuffix(raw, "kbps"):
raw, factor = strings.TrimSuffix(raw, "kbps"), 1e3
case strings.HasSuffix(raw, "bps"):
raw, factor = strings.TrimSuffix(raw, "bps"), 1
}
val, err := strconv.ParseUint(raw, 10, 64)
if err != nil {
return serrors.WrapStr("parsing bandwidth", err, "input", string(text))
}
*b = Bandwidth(val * factor)
return nil
}
func (b Bandwidth) MarshalText() (text []byte, err error) {
return []byte(b.String()), nil
}
func (b Bandwidth) String() string {
switch {
case b >= 1e9 && b%1e9 == 0:
return fmt.Sprintf("%dgbps", b/1e9)
case b >= 1e6 && b%1e6 == 0:
return fmt.Sprintf("%dmbps", b/1e6)
case b >= 1e3 && b%1e3 == 0:
return fmt.Sprintf("%dkbps", b/1e3)
default:
return fmt.Sprintf("%dbps", b)
}
}