1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
package dhcpv6
import (
"fmt"
"strings"
"github.com/u-root/u-root/pkg/uio"
)
// OptRequestedOption implements the requested options option.
//
// This module defines the OptRequestedOption structure.
// https://www.ietf.org/rfc/rfc3315.txt
type OptRequestedOption struct {
requestedOptions []OptionCode
}
func (op *OptRequestedOption) Code() OptionCode {
return OptionORO
}
func (op *OptRequestedOption) ToBytes() []byte {
buf := uio.NewBigEndianBuffer(nil)
for _, ro := range op.requestedOptions {
buf.Write16(uint16(ro))
}
return buf.Data()
}
func (op *OptRequestedOption) RequestedOptions() []OptionCode {
return op.requestedOptions
}
func (op *OptRequestedOption) SetRequestedOptions(opts []OptionCode) {
op.requestedOptions = opts
}
func (op *OptRequestedOption) AddRequestedOption(opt OptionCode) {
for _, requestedOption := range op.requestedOptions {
if opt == requestedOption {
fmt.Printf("Warning: option %s is already set, appending duplicate", opt)
}
}
op.requestedOptions = append(op.requestedOptions, opt)
}
func (op *OptRequestedOption) String() string {
names := make([]string, 0, len(op.requestedOptions))
for _, code := range op.requestedOptions {
names = append(names, code.String())
}
return fmt.Sprintf("OptRequestedOption{options=[%v]}", strings.Join(names, ", "))
}
// build an OptRequestedOption structure from a sequence of bytes.
// The input data does not include option code and length bytes.
func ParseOptRequestedOption(data []byte) (*OptRequestedOption, error) {
var opt OptRequestedOption
buf := uio.NewBigEndianBuffer(data)
for buf.Has(2) {
opt.requestedOptions = append(opt.requestedOptions, OptionCode(buf.Read16()))
}
return &opt, buf.FinError()
}
|
