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package bsdp
import (
"fmt"
"github.com/insomniacslk/dhcp/dhcpv4"
)
// Implements the BSDP option machine name, which gives the Netboot server's
// machine name.
// OptMachineName represents a BSDP message type.
type OptMachineName struct {
Name string
}
// ParseOptMachineName constructs an OptMachineName struct from a sequence of
// bytes and returns it, or an error.
func ParseOptMachineName(data []byte) (*OptMachineName, error) {
if len(data) < 2 {
return nil, dhcpv4.ErrShortByteStream
}
code := dhcpv4.OptionCode(data[0])
if code != OptionMachineName {
return nil, fmt.Errorf("expected option %v, got %v instead", OptionMachineName, code)
}
length := int(data[1])
if len(data) < length+2 {
return nil, fmt.Errorf("expected length %d, got %d instead", length, len(data))
}
return &OptMachineName{Name: string(data[2 : length+2])}, nil
}
// Code returns the option code.
func (o *OptMachineName) Code() dhcpv4.OptionCode {
return OptionMachineName
}
// ToBytes returns a serialized stream of bytes for this option.
func (o *OptMachineName) ToBytes() []byte {
return append([]byte{byte(o.Code()), byte(o.Length())}, []byte(o.Name)...)
}
// String returns a human-readable string for this option.
func (o *OptMachineName) String() string {
return "BSDP Machine Name -> " + o.Name
}
// Length returns the length of the data portion of this option.
func (o *OptMachineName) Length() int {
return len(o.Name)
}
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