1 files changed, 49 insertions, 0 deletions
diff --git a/dhcpv4/option_host_name.go b/dhcpv4/option_host_name.go
new file mode 100644
index 0000000..a922a2b
--- /dev/null
+++ b/dhcpv4/option_host_name.go
@@ -0,0 +1,49 @@
+package dhcpv4
+
+import "fmt"
+
+// This option implements the host name option
+// https://tools.ietf.org/html/rfc2132
+
+// OptHostName represents an option encapsulating the host name.
+type OptHostName struct {
+	HostName string
+}
+
+// ParseOptHostName returns a new OptHostName from a byte stream, or error if
+// any.
+func ParseOptHostName(data []byte) (*OptHostName, error) {
+	if len(data) < 3 {
+		return nil, ErrShortByteStream
+	}
+	code := OptionCode(data[0])
+	if code != OptionHostName {
+		return nil, fmt.Errorf("expected code %v, got %v", OptionHostName, code)
+	}
+	length := int(data[1])
+	if len(data) < 2+length {
+		return nil, ErrShortByteStream
+	}
+	return &OptHostName{HostName: string(data[2 : 2+length])}, nil
+}
+
+// Code returns the option code.
+func (o *OptHostName) Code() OptionCode {
+	return OptionHostName
+}
+
+// ToBytes returns a serialized stream of bytes for this option.
+func (o *OptHostName) ToBytes() []byte {
+	return append([]byte{byte(o.Code()), byte(o.Length())}, []byte(o.HostName)...)
+}
+
+// String returns a human-readable string.
+func (o *OptHostName) String() string {
+	return fmt.Sprintf("Host Name -> %v", o.HostName)
+}
+
+// Length returns the length of the data portion (excluding option code an byte
+// length).
+func (o *OptHostName) Length() int {
+	return len(o.HostName)
+}