interceptor: add initial proto log format

This serves as a stable binary format for communication of state.

Bug: 205577427
Signed-off-by: Matthias Maennich <maennich@google.com>
Change-Id: I383723e5665a47769d7fbfc4187b7864476b59a1

2 files changed, 50 insertions, 0 deletions

diff --git a/interceptor/Android.bp b/interceptor/Android.bp
index ae4fd6d..85081c5 100644
--- a/interceptor/Android.bp
+++ b/interceptor/Android.bp
@@ -14,6 +14,17 @@ cc_library_host_shared {
     ],
 }
 
+cc_library_host_static {
+    name: "libinterceptor_log",
+    srcs: ["log.proto"],
+    proto: {
+        type: "full",
+        static: true,
+        export_proto_headers: true,
+        canonical_path_from_root: false,
+    },
+}
+
 cc_binary_host {
     name: "interceptor",
     srcs: ["main.cc"],
diff --git a/interceptor/log.proto b/interceptor/log.proto
new file mode 100644
index 0000000..fc9e31d
--- /dev/null
+++ b/interceptor/log.proto
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * 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.
+ */
+
+syntax = "proto3";
+
+package interceptor.log;
+
+// A Command as traced by intercepting an execve() invocation.
+message Command {
+  string program = 1;
+  repeated string args = 2;
+  string current_dir = 3;
+  repeated string inputs = 4;
+  repeated string outputs = 5;
+};
+
+// A single message as emitted by an intercepted process. It can contain any of
+// the above messages.
+message Message {
+  oneof message { Command command = 1; }
+}
+
+// The entirety of a the final log should be stored as just this Log.
+message Log {
+  repeated Command commands = 1;
+}