206 lines
7.3 KiB
Markdown
206 lines
7.3 KiB
Markdown
# Networking Handoff
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Date: 2026-04-02
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Commit: `5346d15` (`Add KMP networking backends`)
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## Scope completed
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The `lyngio` networking work now provides a uniform Lyng-facing API with capability probes and platform-specific implementations.
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Implemented modules:
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- `lyng.io.http`
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- `lyng.io.ws`
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- `lyng.io.net`
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## Current support matrix
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### HTTP / HTTPS
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- JVM: supported
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- Android: supported
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- JS: supported
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- Linux Native: supported
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- Windows Native (`mingwX64`): supported
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- Apple Native: compile-verified on this Linux host
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### WS / WSS
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- JVM: supported
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- Android: supported
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- JS: supported
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- Linux Native: supported
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- Windows Native (`mingwX64`): supported
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- Apple Native: compile-verified on this Linux host
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### Raw networking (`lyng.io.net`)
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- JVM: supported
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- Android: supported
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- JS/Node: supported
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- JS/browser: unsupported by capability probe
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- Linux Native: supported
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- Apple Native: enabled via shared native backend; compile-verified, runtime not yet host-verified
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- Other Native targets: intentionally still unsupported
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## Important design decisions
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- Ktor is the backend for all currently implemented networking.
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- API is uniform across targets; platform variance is exposed through capability checks such as:
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- `Http.isSupported()`
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- `Ws.isSupported()`
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- `Net.isSupported()`
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- `Net.isTcpAvailable()`
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- `Net.isTcpServerAvailable()`
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- `Net.isUdpAvailable()`
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- Native support was restricted to what matches Ktor client-engine support:
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- Darwin for Apple Native
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- Curl for Linux Native
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- WinHttp for Windows Native
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- Native raw sockets use a shared Ktor socket implementation for Linux and Darwin source sets.
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- Capability probes are enabled on Linux Native and Apple Native; Apple Native is compile-verified but not yet runtime-tested on a macOS host.
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## Documentation and tests status
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Docs updated:
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- `docs/lyng.io.http.md`
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- `docs/lyng.io.ws.md`
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- `docs/lyng.io.net.md`
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Verified docs/tests:
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- HTTP/HTTPS docs are covered with extracted markdown tests on JVM.
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- WS/WSS docs are covered with extracted markdown tests on JVM.
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- JS/Node has both engine-level and Lyng-module-level tests for raw networking.
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## Key implementation files
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Shared:
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- `lyngio/src/commonMain/kotlin/net/sergeych/lyngio/http/LyngHttp.kt`
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- `lyngio/src/commonMain/kotlin/net/sergeych/lyng/io/http/LyngHttpModule.kt`
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- `lyngio/src/commonMain/kotlin/net/sergeych/lyngio/ws/LyngWs.kt`
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- `lyngio/src/commonMain/kotlin/net/sergeych/lyngio/net/LyngNet.kt`
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- `lyngio/build.gradle.kts`
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- `gradle/libs.versions.toml`
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Platform HTTP:
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- `lyngio/src/jvmMain/kotlin/net/sergeych/lyngio/http/PlatformJvm.kt`
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- `lyngio/src/jsMain/kotlin/net/sergeych/lyngio/http/PlatformJs.kt`
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- `lyngio/src/androidMain/kotlin/net/sergeych/lyngio/http/PlatformAndroid.kt`
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- `lyngio/src/darwinMain/kotlin/net/sergeych/lyngio/http/PlatformDarwin.kt`
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- `lyngio/src/linuxMain/kotlin/net/sergeych/lyngio/http/PlatformLinux.kt`
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- `lyngio/src/mingwMain/kotlin/net/sergeych/lyngio/http/PlatformMingw.kt`
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Platform WS:
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- `lyngio/src/jvmMain/kotlin/net/sergeych/lyngio/ws/PlatformJvm.kt`
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- `lyngio/src/jsMain/kotlin/net/sergeych/lyngio/ws/PlatformJs.kt`
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- `lyngio/src/androidMain/kotlin/net/sergeych/lyngio/ws/PlatformAndroid.kt`
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- `lyngio/src/darwinMain/kotlin/net/sergeych/lyngio/ws/PlatformDarwin.kt`
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- `lyngio/src/linuxMain/kotlin/net/sergeych/lyngio/ws/PlatformLinux.kt`
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- `lyngio/src/mingwMain/kotlin/net/sergeych/lyngio/ws/PlatformMingw.kt`
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Platform raw net:
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- `lyngio/src/jvmMain/kotlin/net/sergeych/lyngio/net/PlatformJvm.kt`
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- `lyngio/src/jsMain/kotlin/net/sergeych/lyngio/net/PlatformJs.kt`
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- `lyngio/src/androidMain/kotlin/net/sergeych/lyngio/net/PlatformAndroid.kt`
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- `lyngio/src/nativeMain/kotlin/net/sergeych/lyngio/net/NativeKtorNetEngine.kt`
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- `lyngio/src/linuxMain/kotlin/net/sergeych/lyngio/net/PlatformLinux.kt`
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- `lyngio/src/darwinMain/kotlin/net/sergeych/lyngio/net/PlatformDarwin.kt`
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- `lyngio/src/mingwMain/kotlin/net/sergeych/lyngio/net/PlatformMingw.kt`
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JS tests:
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- `lyngio/src/jsTest/kotlin/net/sergeych/lyngio/PlatformCapabilityJsTest.kt`
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- `lyngio/src/jsTest/kotlin/net/sergeych/lyngio/NetJsNodeTest.kt`
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- `lyngio/src/jsTest/kotlin/net/sergeych/lyng/io/net/LyngNetModuleJsNodeTest.kt`
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JVM tests:
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- `lyngio/src/jvmTest/kotlin/LyngioBookTest.kt`
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- `lyngio/src/jvmTest/kotlin/net/sergeych/lyng/io/http/LyngHttpModuleTest.kt`
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- `lyngio/src/jvmTest/kotlin/net/sergeych/lyng/io/ws/LyngWsModuleTest.kt`
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- `lyngio/src/jvmTest/kotlin/net/sergeych/lyng/io/net/LyngNetModuleTest.kt`
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Linux Native tests:
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- `lyngio/src/linuxTest/kotlin/net/sergeych/lyngio/net/NetLinuxNativeTest.kt`
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## Verification already run
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JVM / docs:
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- `./gradlew :lyngio:jvmTest --tests LyngioBookTest`
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- `./gradlew :lyngio:jvmTest --tests net.sergeych.lyng.io.http.LyngHttpModuleTest`
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- `./gradlew :lyngio:jvmTest --tests net.sergeych.lyng.io.ws.LyngWsModuleTest`
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- `./gradlew :lyngio:jvmTest --tests net.sergeych.lyng.io.net.LyngNetModuleTest`
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JS:
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- `./gradlew :lyngio:compileKotlinJs`
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- `./gradlew :lyngio:compileTestKotlinJs`
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- `./gradlew :lyngio:jsNodeTest`
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- `./gradlew kotlinUpgradeYarnLock`
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Android:
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- `./gradlew :lyngio:compileDebugKotlinAndroid`
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- `./gradlew :lyngio:compileReleaseKotlinAndroid`
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Native:
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- `./gradlew :lyngio:compileKotlinLinuxX64`
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- `./gradlew :lyngio:compileKotlinLinuxArm64`
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- `./gradlew :lyngio:compileKotlinMingwX64`
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- `./gradlew :lyngio:compileKotlinIosX64`
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- `./gradlew :lyngio:compileKotlinIosArm64`
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- `./gradlew :lyngio:compileKotlinIosSimulatorArm64`
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- `./gradlew :lyngio:compileKotlinMacosArm64`
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- `./gradlew :lyngio:compileTestKotlinLinuxX64`
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- `./gradlew :lyngio:compileTestKotlinLinuxArm64`
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- `./gradlew :lyngio:linkDebugTestLinuxX64`
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- `./gradlew :lyngio:linuxX64Test`
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- `./gradlew :lyngio:linuxX64Test --tests net.sergeych.lyngio.net.NetLinuxNativeTest`
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- `./gradlew :lyngio:linuxX64Test --tests net.sergeych.lyngio.net.NetLinuxNativeTest.testLinuxNativeTcpAndUdpLoopback`
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- `./lyngio/build/bin/linuxX64/debugTest/test.kexe --ktest_filter='net.sergeych.lyngio.net.NetLinuxNativeTest.*'`
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## Known intentional gaps
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- Native raw sockets are enabled on Linux Native and Apple Native.
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- Apple Native raw networking is enabled based on shared-backend compile verification; runtime verification on macOS is still pending.
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- No Android device/instrumented runtime tests were added; only compile verification was done.
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## Worktree state after commit
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Current HEAD:
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- `5346d15` `Add KMP networking backends`
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Unrelated remaining change:
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- `examples/tetris_console.lyng`
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That file was not touched by the networking work and was intentionally left out of the commit.
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## Recommended next steps
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1. Add Native raw socket support only per target that compiles and passes a smoke test.
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2. Keep capability probes `false` on non-Linux Native targets until each raw-socket backend is proven.
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3. If Apple Native work continues, compile Darwin targets on a macOS host before claiming support.
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4. Run a macOS-hosted runtime smoke test when available to verify the already-enabled Darwin backend.
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5. Optionally add Android runtime tests later; compile-only verification exists now.
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## Suggested first task for the next chat
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Continue Native raw `lyng.io.net` incrementally from the verified Linux baseline:
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- keep Linux Native enabled
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- keep Apple Native enabled unless runtime verification disproves the shared-backend assumption
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- keep other Native targets capability-gated off until compiled and smoke-tested
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- use only `ktor-network` support that actually compiles
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- do not change the Lyng-facing API
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