dhcpv6: add DHCPv4-over-DHCPv6 support

Add message types, options, and modifier for handling DHCPv4-over-DHCPv6.

Refer to RFC 7341

Signed-off-by: Mikael Magnusson <mikma@users.sourceforge.net>

1 files changed, 39 insertions, 0 deletions

diff --git a/dhcpv6/option_dhcpv4_msg.go b/dhcpv6/option_dhcpv4_msg.go
new file mode 100644
index 0000000..0a1a2b3
--- /dev/null
+++ b/dhcpv6/option_dhcpv4_msg.go
@@ -0,0 +1,39 @@
+package dhcpv6
+
+import (
+	"fmt"
+
+	"github.com/insomniacslk/dhcp/dhcpv4"
+)
+
+// OptDHCPv4Msg represents a OptionDHCPv4Msg option
+//
+// This module defines the OptDHCPv4Msg structure.
+// https://www.ietf.org/rfc/rfc7341.txt
+type OptDHCPv4Msg struct {
+	Msg *dhcpv4.DHCPv4
+}
+
+// Code returns the option code
+func (op *OptDHCPv4Msg) Code() OptionCode {
+	return OptionDHCPv4Msg
+}
+
+// ToBytes returns the option serialized to bytes.
+func (op *OptDHCPv4Msg) ToBytes() []byte {
+	return op.Msg.ToBytes()
+}
+
+func (op *OptDHCPv4Msg) String() string {
+	return fmt.Sprintf("OptDHCPv4Msg{%v}", op.Msg)
+}
+
+// ParseOptDHCPv4Msg builds an OptDHCPv4Msg structure
+// from a sequence of bytes. The input data does not include option code and length
+// bytes.
+func ParseOptDHCPv4Msg(data []byte) (*OptDHCPv4Msg, error) {
+	var opt OptDHCPv4Msg
+	var err error
+	opt.Msg, err = dhcpv4.FromBytes(data)
+	return &opt, err
+}