Update dependencies

vendor/github.com/insomniacslk/dhcp/dhcpv4/option_ip.go

@@ -0,0 +1,62 @@
+package dhcpv4
+
+import (
+	"net"
+
+	"github.com/u-root/uio/uio"
+)
+
+// IP implements DHCPv4 IP option marshaling and unmarshaling as described by
+// RFC 2132, Sections 5.3, 9.1, 9.7, and others.
+type IP net.IP
+
+// FromBytes parses an IP from data in binary form.
+func (i *IP) FromBytes(data []byte) error {
+	buf := uio.NewBigEndianBuffer(data)
+	*i = IP(buf.CopyN(net.IPv4len))
+	return buf.FinError()
+}
+
+// ToBytes returns a serialized stream of bytes for this option.
+func (i IP) ToBytes() []byte {
+	return []byte(net.IP(i).To4())
+}
+
+// String returns a human-readable IP.
+func (i IP) String() string {
+	return net.IP(i).String()
+}
+
+// GetIP returns code out of o parsed as an IP.
+func GetIP(code OptionCode, o Options) net.IP {
+	v := o.Get(code)
+	if v == nil {
+		return nil
+	}
+	var ip IP
+	if err := ip.FromBytes(v); err != nil {
+		return nil
+	}
+	return net.IP(ip)
+}
+
+// OptBroadcastAddress returns a new DHCPv4 Broadcast Address option.
+//
+// The broadcast address option is described in RFC 2132, Section 5.3.
+func OptBroadcastAddress(ip net.IP) Option {
+	return Option{Code: OptionBroadcastAddress, Value: IP(ip)}
+}
+
+// OptRequestedIPAddress returns a new DHCPv4 Requested IP Address option.
+//
+// The requested IP address option is described by RFC 2132, Section 9.1.
+func OptRequestedIPAddress(ip net.IP) Option {
+	return Option{Code: OptionRequestedIPAddress, Value: IP(ip)}
+}
+
+// OptServerIdentifier returns a new DHCPv4 Server Identifier option.
+//
+// The server identifier option is described by RFC 2132, Section 9.7.
+func OptServerIdentifier(ip net.IP) Option {
+	return Option{Code: OptionServerIdentifier, Value: IP(ip)}
+}