Actually name the package correctly, so that it can be imported.

dhcp4/conn.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package dhcp
+package dhcp4
 
 import (
 	"errors"

dhcp4/conn_linux.go

@@ -14,7 +14,7 @@
 
 //+build linux
 
-package dhcp
+package dhcp4
 
 import (
 	"encoding/binary"

dhcp4/conn_test.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package dhcp
+package dhcp4
 
 import (
 	"net"

dhcp4/doc.go

@@ -13,4 +13,4 @@
 // limitations under the License.
 
 // Package dhcp provides building blocks for DHCP clients and servers.
-package dhcp // import "go.universe.tf/netboot/dhcp4"
+package dhcp4 // import "go.universe.tf/netboot/dhcp4"

dhcp4/options.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package dhcp
+package dhcp4
 
 import (
 	"bytes"

dhcp4/options_test.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package dhcp
+package dhcp4
 
 import (
 	"net"

dhcp4/packet.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package dhcp
+package dhcp4
 
 import (
 	"bytes"

dhcp4/packet_test.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package dhcp
+package dhcp4
 
 import (
 	"bytes"