3 files changed, 47 insertions, 0 deletions
diff --git a/dhcpv6/dhcpv6.go b/dhcpv6/dhcpv6.go
index 9b6ef5c..146687a 100644
--- a/dhcpv6/dhcpv6.go
+++ b/dhcpv6/dhcpv6.go
@@ -11,6 +11,9 @@ type DHCPv6 interface {
 	String() string
 	Summary() string
 	Length() int
+	IsRelay() bool
+	GetOption(code OptionCode) []Option
+	GetOneOption(code OptionCode) Option
 }
 
 func FromBytes(data []byte) (DHCPv6, error) {
@@ -78,3 +81,24 @@ func NewMessage() (*DHCPv6Message, error) {
 	}
 	return &d, nil
 }
+
+func getOptions(options []Option, code OptionCode, onlyFirst bool) []Option {
+	var ret []Option
+	for _, opt := range options {
+		if opt.Code() == code {
+			ret = append(ret, opt)
+			if onlyFirst {
+				break
+			}
+		}
+	}
+	return ret
+}
+
+func getOption(options []Option, code OptionCode) Option {
+	opts := getOptions(options, code, true)
+	if opts == nil {
+		return nil
+	}
+	return opts[0]
+}
diff --git a/dhcpv6/dhcpv6message.go b/dhcpv6/dhcpv6message.go
index 93966f7..7151096 100644
--- a/dhcpv6/dhcpv6message.go
+++ b/dhcpv6/dhcpv6message.go
@@ -190,3 +190,15 @@ func (d *DHCPv6Message) Length() int {
 func (d *DHCPv6Message) Options() []Option {
 	return d.options
 }
+
+func (d *DHCPv6Message) GetOption(code OptionCode) []Option {
+	return getOptions(d.options, code, false)
+}
+
+func (d *DHCPv6Message) GetOneOption(code OptionCode) Option {
+	return getOption(d.options, code)
+}
+
+func (d *DHCPv6Message) IsRelay() bool {
+	return false
+}
diff --git a/dhcpv6/dhcpv6relay.go b/dhcpv6/dhcpv6relay.go
index 716c24f..0423f36 100644
--- a/dhcpv6/dhcpv6relay.go
+++ b/dhcpv6/dhcpv6relay.go
@@ -72,3 +72,14 @@ func (r *DHCPv6Relay) Length() int {
 func (r *DHCPv6Relay) Options() []Option {
 	return r.options
 }
+func (r *DHCPv6Relay) GetOption(code OptionCode) []Option {
+	return getOptions(r.options, code, false)
+}
+
+func (r *DHCPv6Relay) GetOneOption(code OptionCode) Option {
+	return getOption(r.options, code)
+}
+
+func (r *DHCPv6Relay) IsRelay() bool {
+	return true
+}