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package bsdp
import (
"strings"
"github.com/insomniacslk/dhcp/dhcpv4"
"github.com/u-root/u-root/pkg/uio"
)
// OptVendorSpecificInformation encapsulates the BSDP-specific options used for
// the protocol.
type OptVendorSpecificInformation struct {
Options dhcpv4.Options
}
// parseOption is similar to dhcpv4.ParseOption, except that it switches based
// on the BSDP specific options.
func parseOption(code dhcpv4.OptionCode, data []byte) (dhcpv4.Option, error) {
var (
opt dhcpv4.Option
err error
)
switch code {
case OptionBootImageList:
opt, err = ParseOptBootImageList(data)
case OptionDefaultBootImageID:
opt, err = ParseOptDefaultBootImageID(data)
case OptionMachineName:
opt, err = ParseOptMachineName(data)
case OptionMessageType:
opt, err = ParseOptMessageType(data)
case OptionReplyPort:
opt, err = ParseOptReplyPort(data)
case OptionSelectedBootImageID:
opt, err = ParseOptSelectedBootImageID(data)
case OptionServerIdentifier:
opt, err = ParseOptServerIdentifier(data)
case OptionServerPriority:
opt, err = ParseOptServerPriority(data)
case OptionVersion:
opt, err = ParseOptVersion(data)
default:
opt, err = ParseOptGeneric(code, data)
}
if err != nil {
return nil, err
}
return opt, nil
}
// ParseOptVendorSpecificInformation constructs an OptVendorSpecificInformation struct from a sequence of
// bytes and returns it, or an error.
func ParseOptVendorSpecificInformation(data []byte) (*OptVendorSpecificInformation, error) {
options, err := dhcpv4.OptionsFromBytesWithParser(data, parseOption, false /* don't check for OptionEnd tag */)
if err != nil {
return nil, err
}
return &OptVendorSpecificInformation{options}, nil
}
// Code returns the option code.
func (o *OptVendorSpecificInformation) Code() dhcpv4.OptionCode {
return dhcpv4.OptionVendorSpecificInformation
}
// ToBytes returns a serialized stream of bytes for this option.
func (o *OptVendorSpecificInformation) ToBytes() []byte {
return uio.ToBigEndian(o.Options)
}
// String returns a human-readable string for this option.
func (o *OptVendorSpecificInformation) String() string {
s := "Vendor Specific Information ->"
for _, opt := range o.Options {
optString := opt.String()
// If this option has sub-structures, offset them accordingly.
if strings.Contains(optString, "\n") {
optString = strings.Replace(optString, "\n ", "\n ", -1)
}
s += "\n " + optString
}
return s
}
// GetOption returns all suboptions that match the given OptionCode code.
func (o *OptVendorSpecificInformation) GetOption(code dhcpv4.OptionCode) []dhcpv4.Option {
return o.Options.Get(code)
}
// GetOneOption returns the first suboption that matches the OptionCode code.
func (o *OptVendorSpecificInformation) GetOneOption(code dhcpv4.OptionCode) dhcpv4.Option {
return o.Options.GetOne(code)
}
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