diff --git a/dhcp/dhcp.go b/dhcp/dhcp.go
index e33415c..746c461 100644
--- a/dhcp/dhcp.go
+++ b/dhcp/dhcp.go
@@ -1,3 +1,17 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // Package dhcp implements parsing and serialization of DHCP packets.
 package dhcp
 
diff --git a/dhcp/dhcp_test.go b/dhcp/dhcp_test.go
index 3f29398..14361f8 100644
--- a/dhcp/dhcp_test.go
+++ b/dhcp/dhcp_test.go
@@ -1,3 +1,17 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package dhcp
 
 import (
diff --git a/dhcp/options.go b/dhcp/options.go
index 87c92a1..b608226 100644
--- a/dhcp/options.go
+++ b/dhcp/options.go
@@ -1,3 +1,17 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package dhcp
 
 import (
diff --git a/dhcp/options_test.go b/dhcp/options_test.go
index 1483dd8..1f33520 100644
--- a/dhcp/options_test.go
+++ b/dhcp/options_test.go
@@ -1,3 +1,17 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package dhcp
 
 import "testing"
diff --git a/pcap/reader.go b/pcap/reader.go
index 1d07312..88440ad 100644
--- a/pcap/reader.go
+++ b/pcap/reader.go
@@ -1,3 +1,17 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // Package pcap implements reading and writing the "classic" libpcap format.
 package pcap
 
diff --git a/pcap/reader_test.go b/pcap/reader_test.go
index 9fc09e0..32acc4f 100644
--- a/pcap/reader_test.go
+++ b/pcap/reader_test.go
@@ -1,3 +1,17 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package pcap
 
 import (
diff --git a/pcap/writer.go b/pcap/writer.go
index 8f45453..f823885 100644
--- a/pcap/writer.go
+++ b/pcap/writer.go
@@ -1,3 +1,17 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package pcap
 
 import (
diff --git a/pcap/writer_test.go b/pcap/writer_test.go
index 5f99364..a5d0827 100644
--- a/pcap/writer_test.go
+++ b/pcap/writer_test.go
@@ -1,3 +1,17 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package pcap
 
 import (
diff --git a/tftp/handlers.go b/tftp/handlers.go
index 218e761..c99da40 100644
--- a/tftp/handlers.go
+++ b/tftp/handlers.go
@@ -1,3 +1,17 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package tftp
 
 import (
diff --git a/tftp/interop_test.go b/tftp/interop_test.go
index 5240688..b59573a 100644
--- a/tftp/interop_test.go
+++ b/tftp/interop_test.go
@@ -1,3 +1,17 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package tftp
 
 import (
diff --git a/tftp/tftp.go b/tftp/tftp.go
index 75b7402..58820c1 100644
--- a/tftp/tftp.go
+++ b/tftp/tftp.go
@@ -1,3 +1,17 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 // Package tftp implements a read-only TFTP server.
 package tftp