//
// Copyright (C) 2018 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.
//

// The network stack can be compiled using system_current (non-finalized) SDK, or finalized system_X
// SDK. There is also a variant that uses system_current SDK and runs in the system process
// (InProcessNetworkStack). The following structure is used to create the build rules:
//
//                          NetworkStackAndroidLibraryDefaults <-- common defaults for android libs
//                                            /    \
//           +NetworkStackApiStableShims --> /      \ <-- +NetworkStackApiCurrentShims
//           +NetworkStackReleaseApiLevel   /        \    +NetworkStackDevApiLevel
//           +jarjar apistub.api[latest].* /          \   +module src/
//            to apistub.*                /            \
//                                       /              \
//         NetworkStackApiStableDependencies             \
//                                     /                  \               android libs w/ all code
//                   +module src/ --> /                    \              (also used in unit tests)
//                                   /                      \                        |
//               NetworkStackApiStableLib               NetworkStackApiCurrentLib <--*
//                          |                                     |
//                          | <--   +NetworkStackAppDefaults  --> |
//                          |          (APK build params)         |
//                          |                                     |
//                          | <-- +NetworkStackReleaseApiLevel    | <-- +NetworkStackDevApiLevel
//                          |                                     |
//                          |                                     |
//                NetworkStackApiStable          NetworkStack, InProcessNetworkStack, <-- APKs
//                                                         TestNetworkStack

// Common defaults to define SDK level
java_defaults {
    name: "NetworkStackDevApiLevel",
    min_sdk_version: "29",
    sdk_version: "system_current",
}

java_defaults {
    name: "NetworkStackReleaseApiLevel",
    sdk_version: "system_30",
    min_sdk_version: "29",
    target_sdk_version: "30",
}

// Filegroups for the API shims
filegroup {
    name: "NetworkStackApiCurrentShims",
    srcs: [
        "apishim/common/**/*.java",
        "apishim/29/**/*.java",
        "apishim/30/**/*.java",
        "apishim/31/**/*.java",
        ":networkstack-module-utils-srcs",
    ],
}

// API stable shims only include the compat package, but it is jarjared to replace the non-compat
// package
filegroup {
    name: "NetworkStackApiStableShims",
    srcs: [
        "apishim/common/**/*.java",
        "apishim/29/**/*.java",
        "apishim/30/**/*.java",
        ":networkstack-module-utils-srcs",
    ],
}

// Common defaults for android libraries containing network stack code, used to compile variants of
// the network stack in the system process and in the network_stack process
java_defaults {
    name: "NetworkStackAndroidLibraryDefaults",
    srcs: [
        ":framework-networkstack-shared-srcs",
    ],
    libs: ["unsupportedappusage"],
    static_libs: [
        "androidx.annotation_annotation",
        "netd_aidl_interface-unstable-java",
        "netlink-client",
        "networkstack-client",
        "net-utils-framework-common",
        // See note on statsprotos when adding/updating proto build rules
        "datastallprotosnano",
        "statsprotos",
        "captiveportal-lib",
        "net-utils-device-common",
    ],
    plugins: ["java_api_finder"],
}

// The versions of the android library containing network stack code compiled for each SDK variant
// API current uses the sources of the API current shims directly.
// This allows API current code to be treated identically to code in src/ (it will be moved
// there eventually), and to use the compat shim as fallback on older devices.
android_library {
    name: "NetworkStackApiCurrentLib",
    defaults: ["NetworkStackDevApiLevel", "NetworkStackAndroidLibraryDefaults"],
    srcs: [
        ":NetworkStackApiCurrentShims",
        "src/**/*.java",
        ":statslog-networkstack-java-gen"
    ],
    manifest: "AndroidManifestBase.xml",
}

// For API stable, first build the dependencies using jarjar compat rules, then build the sources
// linking with the dependencies.
java_library {
    name: "NetworkStackApiStableDependencies",
    defaults: ["NetworkStackReleaseApiLevel", "NetworkStackAndroidLibraryDefaults"],
    srcs: [":NetworkStackApiStableShims"],
    jarjar_rules: "apishim/jarjar-rules-compat.txt",
}

android_library {
    name: "NetworkStackApiStableLib",
    defaults: ["NetworkStackReleaseApiLevel"],
    srcs: [
        "src/**/*.java",
        ":statslog-networkstack-java-gen",
    ],
    // API stable uses a jarjared version of the shims
    static_libs: [
        "NetworkStackApiStableDependencies",
    ],
    manifest: "AndroidManifestBase.xml",
}

filegroup {
    name: "NetworkStackJarJarRules",
    srcs: ["jarjar-rules-shared.txt"],
    visibility: [
        "//packages/modules/NetworkStack/tests/unit",
        "//packages/modules/NetworkStack/tests/integration",
        "//frameworks/base/packages/Tethering/tests/integration",
        "//packages/modules/Connectivity/Tethering/tests/integration",
    ]
}

// Common defaults for compiling the actual APK, based on the NetworkStackApiXBase android libraries
java_defaults {
    name: "NetworkStackAppDefaults",
    privileged: true,
    jni_libs: [
        "libnativehelper_compat_libc++",
        "libnetworkstackutilsjni",
    ],
    // Resources already included in NetworkStackBase
    resource_dirs: [],
    jarjar_rules: ":NetworkStackJarJarRules",
    use_embedded_native_libs: true,
    optimize: {
        proguard_flags_files: ["proguard.flags"],
    },
}

// Non-updatable network stack running in the system server process for devices not using the module
android_app {
    name: "InProcessNetworkStack",
    defaults: [ "NetworkStackAppDefaults", "NetworkStackDevApiLevel"],
    static_libs: ["NetworkStackApiCurrentLib"],
    certificate: "platform",
    manifest: "AndroidManifest_InProcess.xml",
    // InProcessNetworkStack is a replacement for NetworkStack
    overrides: ["NetworkStack", "NetworkStackNext"],
    // The permission configuration *must* be included to ensure security of the device
    // The InProcessNetworkStack goes together with the PlatformCaptivePortalLogin, which replaces
    // the default CaptivePortalLogin.
    required: ["PlatformNetworkPermissionConfig", "PlatformCaptivePortalLogin"],
}

// Pre-merge the AndroidManifest for NetworkStackNext, so that its manifest can be merged on top
android_library {
    name: "NetworkStackNextManifestBase",
    defaults: ["NetworkStackAppDefaults", "NetworkStackDevApiLevel"],
    static_libs: ["NetworkStackApiCurrentLib"],
    manifest: "AndroidManifest.xml"
}

// NetworkStack build targeting the current API release, for testing on in-development SDK
android_app {
    name: "NetworkStackNext",
    defaults: ["NetworkStackAppDefaults", "NetworkStackDevApiLevel"],
    static_libs: ["NetworkStackNextManifestBase"],
    certificate: "networkstack",
    manifest: "AndroidManifest_Next.xml",
    // The permission configuration *must* be included to ensure security of the device
    required: ["NetworkPermissionConfig"],
}

// Updatable network stack for finalized API
android_app {
    name: "NetworkStack",
    defaults: ["NetworkStackAppDefaults", "NetworkStackReleaseApiLevel"],
    static_libs: ["NetworkStackApiStableLib"],
    certificate: "networkstack",
    manifest: "AndroidManifest.xml",
    // The permission configuration *must* be included to ensure security of the device
    required: ["NetworkPermissionConfig"],
    updatable: true,
}

// Android library to derive test APKs for integration tests
android_library {
    name: "TestNetworkStackLib",
    defaults: ["NetworkStackAppDefaults", "NetworkStackReleaseApiLevel"],
    static_libs: ["NetworkStackApiStableLib"],
    manifest: "AndroidManifestBase.xml",
    visibility: [
        "//frameworks/base/tests/net/integration",
        "//cts/tests/tests/net",
        "//packages/modules/Connectivity/tests/cts/net",
    ],
}

cc_library_shared {
    name: "libnetworkstackutilsjni",
    srcs: [
        "jni/network_stack_utils_jni.cpp"
    ],
    sdk_version: "29",
    min_sdk_version: "29",
    shared_libs: [
        "liblog",
        "libnativehelper_compat_libc++",
    ],
    static_libs: [
        "libnetjniutils",
    ],

    // We cannot use plain "libc++" here to link libc++ dynamically because it results in:
    //   java.lang.UnsatisfiedLinkError: dlopen failed: library "libc++_shared.so" not found
    // even if "libc++" is added into jni_libs below. Adding "libc++_shared" into jni_libs doesn't
    // build because soong complains of:
    //   module NetworkStack missing dependencies: libc++_shared
    //
    // So, link libc++ statically. This means that we also need to ensure that all the C++ libraries
    // we depend on do not dynamically link libc++. This is currently the case, because liblog is
    // C-only and libnativehelper_compat_libc also uses stl: "c++_static".
    //
    // TODO: find a better solution for this in R.
    stl: "c++_static",
    cflags: [
        "-Wall",
        "-Werror",
        "-Wno-unused-parameter",
    ],
}

genrule {
    name: "statslog-networkstack-java-gen",
    tools: ["stats-log-api-gen"],
    cmd: "$(location stats-log-api-gen) --java $(out) --module network_stack" +
         " --javaPackage com.android.networkstack.metrics --javaClass NetworkStackStatsLog" +
         " --supportQ",
    out: ["com/android/networkstack/metrics/NetworkStackStatsLog.java"],
}

version_code_networkstack_next = "300000000"
version_code_networkstack_test = "999999999"

genrule {
    name: "NetworkStackTestAndroidManifest",
    srcs: ["AndroidManifest.xml"],
    out: ["TestAndroidManifest.xml"],
    cmd: "sed -E 's/versionCode=\"[0-9]+\"/versionCode=\""
        + version_code_networkstack_test
        + "\"/' $(in) > $(out)",
    visibility: ["//visibility:private"],
}

android_app {
    name: "TestNetworkStack",
    defaults: ["NetworkStackAppDefaults", "NetworkStackDevApiLevel"],
    static_libs: ["NetworkStackApiCurrentLib"],
    certificate: "networkstack",
    manifest: ":NetworkStackTestAndroidManifest",
    // The permission configuration *must* be included to ensure security of the device
    required: ["NetworkPermissionConfig"],
}

// When adding or modifying protos, the jarjar rules and possibly proguard rules need
// to be updated: proto libraries may pull additional static libraries.
java_library_static {
    name: "statsprotos",
    proto: {
        type: "lite",
    },
    srcs: [
        "src/com/android/networkstack/metrics/stats.proto",
    ],
    static_libs: [
        "networkstackprotos",
    ],
    defaults: ["NetworkStackReleaseApiLevel"],
}