From 34690ced91e22f5d9b5dd19c33b11c8e0b4bafa0 Mon Sep 17 00:00:00 2001
From: xunchang <xunchang@google.com>
Date: Fri, 5 Apr 2019 16:16:07 -0700
Subject: Add socket communication between recovery and minadbd

This cl adds a socket pair to support the communication between recovery
and minadbd. Therefore, minadbd will be able to issue multiple commands
to recovery and get back the status of each command.

This cl also switches the adb sideload from the recovery menu to use
this protocol; and moves minadbd to a separate binary.

Bug: 130166585
Test: sideload a package
Change-Id: I80d36d5c4e6fe1ae3ea23640907bc50c0dc0d482
---
 minadbd/minadbd_types.h | 53 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 minadbd/minadbd_types.h

(limited to 'minadbd/minadbd_types.h')

diff --git a/minadbd/minadbd_types.h b/minadbd/minadbd_types.h
new file mode 100644
index 000000000..7bd69096a
--- /dev/null
+++ b/minadbd/minadbd_types.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+// The message between recovery and minadbd is 8 bytes in size unless the length is explicitly
+// specified. Both the command and status has the format |prefix(4 bytes) + encoded enum(4 bytes)|.
+constexpr size_t kMinadbdMessageSize = 8;
+constexpr char const kMinadbdCommandPrefix[] = "COMD";
+constexpr char const kMinadbdStatusPrefix[] = "STAT";
+
+enum MinadbdErrorCode : int {
+  kMinadbdSuccess = 0,
+  kMinadbdArgumentsParsingError = 1,
+  kMinadbdSocketIOError = 2,
+  kMinadbdMessageFormatError = 3,
+  kMinadbdAdbVersionError = 4,
+  kMinadbdPackageSizeError = 5,
+  kMinadbdFuseStartError = 6,
+  kMinadbdUnsupportedCommandError = 7,
+  kMinadbdCommandExecutionError = 8,
+  kMinadbdErrorUnknown = 9,
+};
+
+enum class MinadbdCommandStatus : uint32_t {
+  kSuccess = 0,
+  kFailure = 1,
+};
+
+enum class MinadbdCommands : uint32_t {
+  kInstall = 0,
+  kUiPrint = 1,
+  kError = 2,
+};
+
+static_assert(kMinadbdMessageSize == sizeof(kMinadbdCommandPrefix) - 1 + sizeof(MinadbdCommands));
+static_assert(kMinadbdMessageSize ==
+              sizeof(kMinadbdStatusPrefix) - 1 + sizeof(MinadbdCommandStatus));
-- 
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