python: support DESTDIR in pip install step

Use --root $DESTDIR when the environment variable is set so that staged installs (e.g. 'make DESTDIR=/tmp/pkg install') place the Python package under the staging root. Also pass --no-build-isolation and --prefix to avoid rebuilding in an isolated venv and to honour CMAKE_INSTALL_PREFIX.
2026-11-08 12:28:42 +00:00 · 2026-05-25 13:40:55 -04:00
54 changed files with 931 additions and 3758 deletions
@@ -7,7 +7,7 @@ env:
  UBUNTU_FULL_DEPS: "libncurses5-dev libreadline-dev nettle-dev libasio-dev libgnutls28-dev libuv1-dev python3-pip python3-dev python3-setuptools libcppunit-dev libjsoncpp-dev libfmt-dev libmsgpack-dev libargon2-dev"
  UBUNTU_MESON_DEPS: "ninja-build libncurses5-dev libreadline-dev nettle-dev libasio-dev libgnutls28-dev libuv1-dev python3-dev python3-setuptools python3-pip libcppunit-dev libjsoncpp-dev libfmt-dev libmsgpack-dev libargon2-dev"
  UBUNTU_MINIMAL_DEPS: "libncurses5-dev libreadline-dev nettle-dev libfmt-dev libgnutls28-dev libcppunit-dev libmsgpack-dev libargon2-dev"
-  DEBIAN13_DEPS: "git libtool pkg-config wget cmake libncurses5-dev libreadline-dev nettle-dev libasio-dev libgnutls28-dev libuv1-dev python3-pip python3-dev python3-setuptools libcppunit-dev libjsoncpp-dev libfmt-dev libmsgpack-dev libargon2-dev"
+  DEBIAN12_DEPS: "git libtool pkg-config wget cmake libncurses5-dev libreadline-dev nettle-dev libasio-dev libgnutls28-dev libuv1-dev python3-pip python3-dev python3-setuptools libcppunit-dev libjsoncpp-dev libfmt-dev libmsgpack-dev libargon2-dev"

 on: [push, pull_request]

@@ -16,7 +16,7 @@ jobs:
    name: Ubuntu/GCC Meson build
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v6

      - name: Install Dependencies
        run: |
@@ -40,7 +40,7 @@ jobs:
      matrix:
        cxx_standard: [17, 20, 23]
    steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v6

      - name: Install Minimal Dependencies
        run: |
@@ -65,12 +65,12 @@ jobs:
      - name: Run Unit tests
        run: ctest --output-on-failure --test-dir build

-  build-debian13:
-    name: Debian 13/GCC build
+  build-debian12:
+    name: Debian 12/GCC build
    runs-on: ubuntu-latest

    container:
-      image: debian:13
+      image: debian:12
      volumes:
        - .:/workspace
      options: --workdir /workspace
@@ -78,12 +78,12 @@ jobs:
        DEBIAN_FRONTEND: noninteractive

    steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v6

      - name: Install Dependencies
        run: |
          apt-get update
-          apt-get install -y $DEBIAN13_DEPS
+          apt-get install -y $DEBIAN12_DEPS

      - name: Build llhttp dependency
        run: |
@@ -131,7 +131,7 @@ jobs:
      matrix:
        cxx_standard: [17, 20, 23]
    steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v6

      - name: Install Homebrew Dependencies
        run: brew install msgpack-cxx asio gnutls nettle readline fmt jsoncpp argon2 openssl cppunit
@@ -6,7 +6,7 @@ jobs:
    name: Clang Static Analysis
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v6
      - name: deps
        run: |
          sudo apt update && \
@@ -27,7 +27,7 @@ jobs:

    steps:
    - name: Checkout repository
-      uses: actions/checkout@v7
+      uses: actions/checkout@v6

    - name: Initialize CodeQL
      uses: github/codeql-action/init@v4
@@ -16,14 +16,14 @@ jobs:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
-        os: [ubuntu-latest, ubuntu-24.04-arm, macos-15]
+        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest]

    steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v6

      # Run locally with: pipx run cibuildwheel --platform linux python
      - name: Build wheels
-        uses: pypa/cibuildwheel@v4.1.1
+        uses: pypa/cibuildwheel@v3.4.1
        with:
          package-dir: python

@@ -36,7 +36,7 @@ jobs:
    name: Build wheels on Windows
    runs-on: windows-latest
    env:
-      VCPKG_VERSION: "2026.06.01"
+      VCPKG_VERSION: "2025.07.25"
      VCPKG_INSTALLATION_ROOT: "C:\\vcpkg"
      VCPKG_DISABLE_METRICS: "1"
      VCPKG_DEFAULT_TRIPLET: x64-windows-release
@@ -44,11 +44,11 @@ jobs:
      VCPKG_DEFAULT_BINARY_CACHE: ${{ github.workspace }}\vcpkg_binary_cache

    steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v6

      - name: Cache vcpkg installed packages
        id: cache-vcpkg
-        uses: actions/cache@v6
+        uses: actions/cache@v5
        with:
          path: |
            ${{ env.VCPKG_INSTALLED_DIR }}
@@ -25,7 +25,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4
@@ -66,7 +66,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4
@@ -107,7 +107,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4
@@ -148,7 +148,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4
@@ -190,7 +190,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4
@@ -231,7 +231,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4
@@ -273,7 +273,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4
@@ -309,7 +309,7 @@ jobs:
    name: Build Windows MSI Installer
    runs-on: windows-latest
    env:
-      VCPKG_VERSION: "2026.06.01"
+      VCPKG_VERSION: "2025.07.25"
      VCPKG_INSTALLATION_ROOT: "C:\\vcpkg"
      VCPKG_DISABLE_METRICS: "1"
      VCPKG_DEFAULT_TRIPLET: x64-windows
@@ -319,7 +319,7 @@ jobs:
      contents: read
    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6
        with:
          submodules: recursive

@@ -334,7 +334,7 @@ jobs:

      - name: Cache vcpkg installed packages
        id: cache-vcpkg
-        uses: actions/cache@v6
+        uses: actions/cache@v5
        with:
          path: |
            ${{ env.VCPKG_INSTALLED_DIR }}
@@ -413,7 +413,7 @@ jobs:
    name: Build Windows dhtnode
    runs-on: windows-latest
    env:
-      VCPKG_VERSION: "2026.06.01"
+      VCPKG_VERSION: "2025.07.25"
      VCPKG_INSTALLATION_ROOT: "C:\\vcpkg"
      VCPKG_DISABLE_METRICS: "1"
      VCPKG_DEFAULT_TRIPLET: x64-windows-static-release
@@ -423,7 +423,7 @@ jobs:
      contents: read
    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6
        with:
          submodules: recursive

@@ -432,7 +432,7 @@ jobs:

      - name: Cache vcpkg static installed packages
        id: cache-vcpkg-static
-        uses: actions/cache@v6
+        uses: actions/cache@v5
        with:
          path: |
            ${{ env.VCPKG_INSTALLED_DIR }}
@@ -499,7 +499,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Download Windows MSI artifact
        uses: actions/download-artifact@v8
@@ -9,7 +9,7 @@ on:
    branches: [ main, master ]

 env:
-  VCPKG_VERSION: "2026.06.01"
+  VCPKG_VERSION: "2026.01.16"
  VCPKG_INSTALLATION_ROOT: "C:\\vcpkg"
  VCPKG_DISABLE_METRICS: "1"
  VCPKG_INSTALLED_DIR: ${{ github.workspace }}\vcpkg_installed
@@ -27,7 +27,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Set up MSVC
        uses: microsoft/setup-msbuild@v3
@@ -41,7 +41,7 @@ jobs:

      - name: Cache vcpkg installed packages
        id: cache-vcpkg
-        uses: actions/cache@v6
+        uses: actions/cache@v5
        with:
          path: |
            ${{ env.VCPKG_INSTALLED_DIR }}
@@ -75,7 +75,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Set up MSVC
        uses: microsoft/setup-msbuild@v3
@@ -89,7 +89,7 @@ jobs:

      - name: Cache vcpkg static installed packages
        id: cache-vcpkg-static
-        uses: actions/cache@v6
+        uses: actions/cache@v5
        with:
          path: |
            ${{ env.VCPKG_INSTALLED_DIR }}
@@ -125,14 +125,14 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Set up MSVC
        uses: microsoft/setup-msbuild@v3

      - name: Restore vcpkg installed packages
        id: cache-vcpkg-restore
-        uses: actions/cache/restore@v6
+        uses: actions/cache/restore@v5
        with:
          path: |
            ${{ env.VCPKG_INSTALLED_DIR }}
@@ -202,14 +202,14 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Set up MSVC
        uses: microsoft/setup-msbuild@v3

      - name: Restore vcpkg static installed packages
        id: cache-vcpkg-static-restore
-        uses: actions/cache/restore@v6
+        uses: actions/cache/restore@v5
        with:
          path: |
            ${{ env.VCPKG_INSTALLED_DIR }}
@@ -275,7 +275,7 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6

      - name: Setup MinGW
        uses: msys2/setup-msys2@v2
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.21...4.4)
+cmake_minimum_required (VERSION 3.21...3.31)
 if(POLICY CMP0091)
    cmake_policy(SET CMP0091 NEW)
 endif()
@@ -10,7 +10,7 @@ if(POLICY CMP0167)
 endif()

 set (opendht_VERSION_MAJOR 4)
-set (opendht_VERSION_MINOR 3.0)
+set (opendht_VERSION_MINOR 0.0)
 set (opendht_VERSION ${opendht_VERSION_MAJOR}.${opendht_VERSION_MINOR})
 set (PACKAGE_VERSION ${opendht_VERSION})
 set (VERSION "${opendht_VERSION}")
@@ -502,11 +502,7 @@ list (APPEND opendht_HEADERS
 )

 if (OPENDHT_PEER_DISCOVERY)
-    list (APPEND opendht_SOURCES
-        src/peer_discovery/mdns.cpp
-        src/peer_discovery/dns_sd.cpp
-        src/peer_discovery/mdns_transport.cpp
-        src/peer_discovery/peer_discovery.cpp)
+    list (APPEND opendht_SOURCES src/peer_discovery.cpp)
    list (APPEND opendht_HEADERS include/opendht/peer_discovery.h)
    add_definitions(-DOPENDHT_PEER_DISCOVERY)
 endif()
@@ -593,7 +589,6 @@ if (MSVC)
            simdutf::simdutf
            wsock32
            ws2_32
-            iphlpapi
    )
    if (OPENDHT_TOOLS)
        target_link_libraries(opendht PUBLIC unofficial::readline-win32::readline)
@@ -677,7 +672,7 @@ else()
    # System-specific linker pipelines
    if (WIN32 AND MINGW) # MSYS2
        message(STATUS "Build pipeline: Windows/MSYS2-MinGW")
-        target_link_libraries(opendht PUBLIC wsock32 ws2_32 iphlpapi)
+        target_link_libraries(opendht PUBLIC wsock32 ws2_32)
        if(OPENDHT_PROXY_OPENSSL)
            target_link_libraries(opendht PUBLIC Crypt32)
        endif()
@@ -893,8 +888,6 @@ if (BUILD_TESTING)
        endif()
        if (OPENDHT_PEER_DISCOVERY)
            list (APPEND test_FILES
-                tests/test_mdns.h
-                tests/test_mdns.cpp
                tests/test_peerdiscovery.h
                tests/test_peerdiscovery.cpp
            )
@@ -267,14 +267,9 @@ public:
    /**
     * Sign this revocation list using provided key and certificate.
     * Validity_period sets the duration until next update (default to no next update).
-     * If `number` is non-zero, it is stored verbatim (big-endian) as the CRL Number
-     * extension. Otherwise the number is initialized randomly on the first signature
-     * and incremented on subsequent ones.
     */
-    void sign(const PrivateKey&, const Certificate&, duration validity_period = {}, uint64_t number = 0);
-    void sign(const Identity& id, duration validity_period = {}, uint64_t number = 0) {
-        sign(*id.first, *id.second, validity_period, number);
-    }
+    void sign(const PrivateKey&, const Certificate&, duration validity_period = {});
+    void sign(const Identity& id) { sign(*id.first, *id.second); }

    bool isSignedBy(const Certificate& issuer) const;

@@ -159,13 +159,7 @@ public:
    {}

    static Value::Filter getFilter() { return EncryptedValue::getFilter(); }
-    virtual void unpackValue(const dht::Value& v) override
-    {
-        BaseClass::unpackValue(v);
-        id = v.id;
-    }

-    dht::Value::Id id {0}; /// Value ID of the trust request, used for deserialization only.
    std::string service;
    std::string conversationId;
    Blob payload;
@@ -51,11 +51,11 @@ using ConnectHandlerCb = std::function<void(const asio::error_code& ec, const as
 using ssl_socket_t = restinio::impl::tls_socket_t;
 using socket_t = asio::ip::tcp::socket;

-struct OPENDHT_PUBLIC Url
+class OPENDHT_PUBLIC Url
 {
+public:
    Url() = default;
-    Url(std::string url);
-
+    Url(std::string_view url);
    std::string url;
    std::string protocol {"http"};
    std::string_view user;
@@ -149,7 +149,7 @@ public:
    using ResolverCb
        = std::function<void(const asio::error_code& ec, const std::vector<asio::ip::tcp::endpoint>& endpoints)>;

-    Resolver(asio::io_context& ctx, std::string url, std::shared_ptr<log::Logger> logger = {});
+    Resolver(asio::io_context& ctx, const std::string& url, std::shared_ptr<log::Logger> logger = {});
    Resolver(asio::io_context& ctx,
             std::string_view host,
             std::string_view service,
@@ -161,6 +161,10 @@ public:
             std::vector<asio::ip::tcp::endpoint> endpoints,
             const bool ssl = false,
             std::shared_ptr<log::Logger> logger = {});
+    Resolver(asio::io_context& ctx,
+             const std::string& url,
+             std::vector<asio::ip::tcp::endpoint> endpoints,
+             std::shared_ptr<log::Logger> logger = {});

    ~Resolver();

@@ -212,19 +216,19 @@ public:

    // resolves implicitly
    Request(asio::io_context& ctx,
-            std::string url,
+            const std::string& url,
            const Json::Value& json,
            OnJsonCb jsoncb,
            std::shared_ptr<log::Logger> logger = {});
-    Request(asio::io_context& ctx, std::string url, OnJsonCb jsoncb, std::shared_ptr<log::Logger> logger = {});
+    Request(asio::io_context& ctx, const std::string& url, OnJsonCb jsoncb, std::shared_ptr<log::Logger> logger = {});

-    Request(asio::io_context& ctx, std::string url, std::shared_ptr<log::Logger> logger = {});
+    Request(asio::io_context& ctx, const std::string& url, std::shared_ptr<log::Logger> logger = {});
    Request(asio::io_context& ctx,
            std::string_view host,
            std::string_view service,
            const bool ssl = false,
            std::shared_ptr<log::Logger> logger = {});
-    Request(asio::io_context& ctx, std::string url, OnDoneCb onDone, std::shared_ptr<log::Logger> logger = {});
+    Request(asio::io_context& ctx, const std::string& url, OnDoneCb onDone, std::shared_ptr<log::Logger> logger = {});

    // user defined resolver
    Request(asio::io_context& ctx, std::shared_ptr<Resolver> resolver, sa_family_t family = AF_UNSPEC);
@@ -340,6 +344,8 @@ private:

    dht::crypto::Identity client_identity_;
    std::shared_ptr<dht::crypto::Certificate> server_ca_;
+    std::string service_;
+    std::string host_;

    unsigned int id_;
    static std::atomic_uint ids_;
@@ -489,12 +489,8 @@ private:
    static constexpr size_t MTU {1280};
    static constexpr size_t MAX_PACKET_VALUE_SIZE {600};
    static constexpr size_t MAX_MESSAGE_VALUE_SIZE {56 * 1024};
-    static constexpr size_t RX_MAX_EARLY_BYTES {MAX_MESSAGE_VALUE_SIZE + MAX_VALUE_SIZE + 32};
-    static constexpr size_t RX_MAX_EARLY_PARTS {RX_MAX_EARLY_BYTES / MTU + 2};

    void process(std::unique_ptr<ParsedMessage>&&, const SockAddr& from);
-    bool isExpectedReply(const ParsedMessage&, const SockAddr& from);
-    bool tryCompleteMessage(PartialMessage&, const SockAddr& from);

    bool rateLimit(const SockAddr& addr);

@@ -531,8 +527,7 @@ private:
    {
        return packValueHeader(buf, values.begin(), values.end());
    }
-    using PartialMessageKey = std::pair<SockAddr, Tid>;
-    void maintainRxBuffer(const PartialMessageKey& key);
+    void maintainRxBuffer(Tid tid);

    /*************
     *  Answers  *
@@ -578,7 +573,7 @@ private:

    // requests handling
    std::map<Tid, Sp<Request>> requests {};
-    std::map<PartialMessageKey, PartialMessage> partial_messages;
+    std::map<Tid, PartialMessage> partial_messages;

    MessageStats in_stats {}, out_stats {};
    std::set<SockAddr> blacklist {};
@@ -3,13 +3,12 @@
 #pragma once

 #include "def.h"
+#include "sockaddr.h"
 #include "infohash.h"
 #include "logger.h"
-#include "sockaddr.h"
 #include "utils.h"

-#include <functional>
-#include <memory>
+#include <asio/steady_timer.hpp>
 #include <thread>

 namespace asio {
@@ -21,26 +20,66 @@ namespace dht {
 class OPENDHT_PUBLIC PeerDiscovery
 {
 public:
-    using PeerDiscoveredCallback = std::function<void(const InfoHash&, SockAddr&&)>;
+    static constexpr in_port_t DEFAULT_PORT = 8888;
+    using ServiceDiscoveredCallback = std::function<void(msgpack::object&&, SockAddr&&)>;

-    PeerDiscovery(std::shared_ptr<asio::io_context> ioContext = {}, std::shared_ptr<Logger> logger = {});
+    PeerDiscovery(in_port_t port = DEFAULT_PORT,
+                  std::shared_ptr<asio::io_context> ioContext = {},
+                  std::shared_ptr<Logger> logger = {});
    ~PeerDiscovery();

-    void startDiscovery(NetId network, PeerDiscoveredCallback callback);
-    void startPublish(const InfoHash& nodeId, NetId network, in_port_t port);
+    /**
+     * startDiscovery - Keep Listening data from the sender until node is joinned
+     * or stop is called
+     */
+    void startDiscovery(std::string_view type, ServiceDiscoveredCallback callback);

-    bool stopDiscovery();
-    bool stopPublish();
+    template<typename T>
+    void startDiscovery(std::string_view type, std::function<void(T&&, SockAddr&&)> cb)
+    {
+        startDiscovery(type, [cb](msgpack::object&& ob, SockAddr&& addr) { cb(ob.as<T>(), std::move(addr)); });
+    }
+
+    /**
+     * startPublish - Keeping sending data until node is joinned or stop is called
+     */
+    void startPublish(std::string_view type, const msgpack::sbuffer& pack_buf);
+    void startPublish(sa_family_t domain, std::string_view type, const msgpack::sbuffer& pack_buf);
+
+    template<typename T>
+    void startPublish(std::string_view type, const T& object)
+    {
+        msgpack::sbuffer buf;
+        msgpack::pack(buf, object);
+        startPublish(type, buf);
+    }
+
+    /**
+     * Thread Stopper
+     */
    void stop();

+    /**
+     * Remove possible callBack to discovery
+     */
+    bool stopDiscovery(std::string_view type);
+
+    /**
+     * Remove different serivce message to send
+     */
+    bool stopPublish(std::string_view type);
+    bool stopPublish(sa_family_t domain, std::string_view type);
+
    void connectivityChanged();
+
    void stopConnectivityChanged();

 private:
-    class Impl;
-    std::shared_ptr<Impl> impl_;
+    class DomainPeerDiscovery;
+    std::unique_ptr<DomainPeerDiscovery> peerDiscovery4_;
+    std::unique_ptr<DomainPeerDiscovery> peerDiscovery6_;
    std::shared_ptr<asio::io_context> ioContext_;
-    std::thread ioRunner_;
+    std::thread ioRunnner_;
 };

-} // namespace dht
+} // namespace dht
@@ -10,9 +10,7 @@
 #include <future>
 #include <functional>

-#if __cplusplus < 202002L
-#include <ciso646>
-#endif
+#include <ciso646> // fix windows compiler bug

 namespace dht {

@@ -85,14 +85,6 @@ using system_clock = std::chrono::system_clock;
 using time_point = clock::time_point;
 using duration = clock::duration;

-OPENDHT_PUBLIC time_point from_system_time(system_clock::time_point t,
-                                           time_point steady_now,
-                                           system_clock::time_point system_now);
-OPENDHT_PUBLIC time_point from_system_time(system_clock::time_point t);
-OPENDHT_PUBLIC system_clock::time_point to_system_time(time_point t,
-                                                       time_point steady_now,
-                                                       system_clock::time_point system_now);
-OPENDHT_PUBLIC system_clock::time_point to_system_time(time_point t);
 OPENDHT_PUBLIC time_point from_time_t(std::time_t t);
 OPENDHT_PUBLIC std::time_t to_time_t(time_point t);

@@ -5,7 +5,7 @@ project(
    'cython',
    license: 'MIT',
    license_files: 'LICENSE',
-    version: '4.3.0',
+    version: '4.0.0',
    meson_version: '>=1.1.0',
    default_options: ['cpp_std=c++20', 'warning_level=3'],
 )
@@ -15,23 +15,10 @@ nettle = dependency('nettle')
 msgpack = dependency('msgpack-cxx', required: false)
 argon2 = dependency('libargon2')
 fmt = dependency('fmt')
-
-proxy_enabled = get_option('proxy_client').enabled() or get_option('proxy_server').enabled()
-
-openssl = dependency('openssl', required: proxy_enabled)
-jsoncpp = dependency('jsoncpp', required: proxy_enabled)
-llhttp = dependency('llhttp', 'libllhttp', required: proxy_enabled)
-simdutf = dependency('simdutf', required: proxy_enabled)
-
-# restinio is a header-only library that may not ship a pkg-config file
-restinio_dep = dependency('restinio', required: false)
-if not restinio_dep.found()
-    cpp = meson.get_compiler('cpp')
-    if cpp.has_header('restinio/all.hpp', required: proxy_enabled)
-        restinio_dep = declare_dependency()
-    endif
-endif
-
+openssl = dependency('openssl', required: get_option('proxy_client'))
+jsoncpp = dependency('jsoncpp', required: get_option('proxy_client'))
+llhttp = dependency('llhttp', 'libllhttp', required: get_option('proxy_client'))
+simdutf = dependency('simdutf', required: get_option('proxy_client'))
 io_uring = host_machine.system() == 'linux' ? dependency('liburing', required: false) : disabler()

 deps = [
@@ -46,10 +33,6 @@ deps = [
    llhttp,
 ]

-if restinio_dep.found()
-    deps += restinio_dep
-endif
-
 if host_machine.system() == 'linux' and io_uring.found()
    deps += io_uring
 endif
@@ -96,7 +79,7 @@ if get_option('indexation').enabled()
    opendht_src += 'src/indexation/pht.cpp'
    add_project_arguments('-DOPENDHT_INDEXATION', language: 'cpp')
 endif
-if jsoncpp.found() and simdutf.found()
+if jsoncpp.found()
    opendht_src += ['src/base64.cpp']
    add_project_arguments('-DOPENDHT_JSONCPP', language: 'cpp')
    conf_data.set('jsoncpp_lib', ', jsoncpp')
@@ -123,21 +106,13 @@ if get_option('push_notifications').enabled()
    add_project_arguments('-DOPENDHT_PUSH_NOTIFICATIONS', language: 'cpp')
 endif
 if get_option('peer_discovery').enabled()
-    opendht_src += [
-        'src/peer_discovery/mdns.cpp',
-        'src/peer_discovery/dns_sd.cpp',
-        'src/peer_discovery/mdns_transport.cpp',
-        'src/peer_discovery/peer_discovery.cpp',
-    ]
+    opendht_src += 'src/peer_discovery.cpp'
    add_project_arguments('-DOPENDHT_PEER_DISCOVERY', language: 'cpp')
-    if host_machine.system() == 'windows'
-        deps += meson.get_compiler('cpp').find_library('iphlpapi')
-    endif
 endif
 opendht = library(
    'opendht',
    opendht_src,
-    include_directories: [opendht_inc, opendht_interface_inc],
+    include_directories: opendht_inc,
    dependencies: deps,
    cpp_args: ['-DOPENDHT_BUILD', '-Dopendht_EXPORTS'],
    install: true,
@@ -335,14 +310,6 @@ if get_option('tests').enabled()
    endif

    if get_option('peer_discovery').enabled()
-        test_mdns = executable(
-            'test_mdns',
-            'tests/test_mdns.cpp',
-            'tests/tests_runner.cpp',
-            dependencies: [opendht_dep, cppunit, jsoncpp, fmt, openssl, msgpack],
-        )
-        test('Mdns', test_mdns)
-
        test_peerdiscovery = executable(
            'test_peerdiscovery',
            'tests/test_peerdiscovery.cpp',
@@ -28,8 +28,18 @@ install(CODE [[
        if(NOT _pip_check EQUAL 0)
            message(WARNING "Skipping Python package install: pip not available for ${Python3_EXECUTABLE}.")
        else()
+            set(_pip_install_args
+                install
+                --no-deps
+                --no-build-isolation
+                --break-system-packages
+                --prefix ${CMAKE_INSTALL_PREFIX})
+            if(DEFINED ENV{DESTDIR} AND NOT "$ENV{DESTDIR}" STREQUAL "")
+                list(APPEND _pip_install_args --root "$ENV{DESTDIR}")
+            endif()
+            list(APPEND _pip_install_args .)
            execute_process(
-                COMMAND ${Python3_EXECUTABLE} -m pip install --no-deps --break-system-packages .
+                COMMAND ${Python3_EXECUTABLE} -m pip ${_pip_install_args}
                WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/python
                OUTPUT_VARIABLE _pip_output
                ERROR_VARIABLE _pip_error
@@ -36,19 +36,4 @@ base64_decode(std::string_view str)
    return buffer;
 }

-std::vector<unsigned char>
-base64_default_or_url_decode(std::string_view str)
-{
-    std::vector<unsigned char> buffer(simdutf::maximal_binary_length_from_base64(str.data(), str.size()));
-    simdutf::result r = simdutf::base64_to_binary(str.data(),
-                                                  str.size(),
-                                                  (char*) buffer.data(),
-                                                  simdutf::base64_options::base64_default_or_url);
-    if (r.error) {
-        throw std::invalid_argument(concat("Invalid base64 input: "sv, simdutf::error_to_string(r.error)));
-    } else {
-        buffer.resize(r.count);
-    }
-    return buffer;
-}
 } // namespace dht
@@ -21,12 +21,5 @@ std::string base64_encode(const std::vector<unsigned char>& str);
 * @return a base64-decoded buffer
 */
 std::vector<unsigned char> base64_decode(std::string_view str);
-/**
- * Decode a buffer in base64 or url style base64 (including '-' '_' ).
- *
- * @param str the input buffer
- * @return a base64-decoded buffer
- */
-std::vector<unsigned char> base64_default_or_url_decode(std::string_view str);

-} // namespace dht
+} // namespace dht
@@ -571,12 +571,6 @@ PublicKey::toString() const
    }
    if (err != GNUTLS_E_SUCCESS)
        throw CryptoException(std::string("Could not print public key: ") + gnutls_strerror(err));
-    // GnuTLS reports the PEM size including the terminating null byte, which
-    // does not belong to the text and would end up embedded in whatever the
-    // string is copied into, such as the "owner" field of a serialized value.
-    ret.resize(sz);
-    if (not ret.empty() and ret.back() == '\0')
-        ret.pop_back();
    return ret;
 }

@@ -1402,11 +1396,8 @@ setRandomSerial(gnutls_x509_crt_t cert)
 {
    std::random_device rdev;
    std::uniform_int_distribution<int64_t> dist {1};
-    const auto cert_serial = dist(rdev);
-    std::array<uint8_t, sizeof(cert_serial)> packed_serial;
-    for (size_t i = 0; i < packed_serial.size(); i++)
-        packed_serial[i] = cert_serial >> (8 * (packed_serial.size() - 1 - i));
-    gnutls_x509_crt_set_serial(cert, packed_serial.data(), packed_serial.size());
+    int64_t cert_serial = dist(rdev);
+    gnutls_x509_crt_set_serial(cert, &cert_serial, sizeof(cert_serial));
 }

 Certificate
@@ -1882,8 +1873,34 @@ RevocationList::getUpdateTime() const
    return std::chrono::system_clock::from_time_t(t);
 }

+enum class Endian : uint32_t { LITTLE = 0, BIG = 1 };
+
+template<typename T>
+T
+endian(T w, Endian endian = Endian::BIG)
+{
+    // this gets optimized out into if (endian == host_endian) return w;
+    union {
+        uint64_t quad;
+        uint32_t islittle;
+    } t;
+    t.quad = 1;
+    if (t.islittle ^ (uint32_t) endian)
+        return w;
+    T r = 0;
+
+    // decent compilers will unroll this (gcc)
+    // or even convert straight into single bswap (clang)
+    for (size_t i = 0; i < sizeof(r); i++) {
+        r <<= 8;
+        r |= w & 0xff;
+        w >>= 8;
+    }
+    return r;
+}
+
 void
-RevocationList::sign(const PrivateKey& key, const Certificate& ca, duration validity, uint64_t crlNumber)
+RevocationList::sign(const PrivateKey& key, const Certificate& ca, duration validity)
 {
    if (auto err = gnutls_x509_crl_set_version(crl, 2))
        throw CryptoException(std::string("Unable to set CRL version: ") + gnutls_strerror(err));
@@ -1893,28 +1910,19 @@ RevocationList::sign(const PrivateKey& key, const Certificate& ca, duration vali
        throw CryptoException(std::string("Unable to set CRL update time: ") + gnutls_strerror(err));
    if (auto err = gnutls_x509_crl_set_next_update(crl, std::chrono::system_clock::to_time_t(next_update)))
        throw CryptoException(std::string("Unable to set CRL next update time: ") + gnutls_strerror(err));
-    uint64_t number {crlNumber};
+    uint64_t number {0};
+    size_t number_sz {sizeof(number)};
+    unsigned critical {0};
+    gnutls_x509_crl_get_number(crl, &number, &number_sz, &critical);
    if (number == 0) {
-        // The CRL Number extension holds a DER integer of variable length, so it must be
-        // read as a big-endian byte string rather than straight into an uint64_t.
-        auto current = getNumber();
-        for (uint8_t byte : current)
-            number = (number << 8) | byte;
-        if (number == 0) {
-            // Initialize to a random number.
-            std::random_device rdev;
-            do {
-                std::generate_n((uint8_t*) &number, sizeof(number), std::bind(rand_byte, std::ref(rdev)));
-            } while (number == 0);
-        } else
-            number++;
-    }
-    // Store the number in network byte order.
-    uint8_t packedNumber[sizeof(number)];
-    for (size_t i = 0; i < sizeof(packedNumber); i++)
-        packedNumber[i] = (uint8_t) ((number >> (8 * (sizeof(packedNumber) - 1 - i))) & 0xff);
-    if (auto err = gnutls_x509_crl_set_number(crl, packedNumber, sizeof(packedNumber)))
-        throw CryptoException(std::string("Unable to set CRL number: ") + gnutls_strerror(err));
+        // initialize to a random number
+        number_sz = sizeof(number);
+        std::random_device rdev;
+        std::generate_n((uint8_t*) &number, sizeof(number), std::bind(rand_byte, std::ref(rdev)));
+    } else
+        number = endian(endian(number) + 1);
+    if (auto err = gnutls_x509_crl_set_number(crl, &number, sizeof(number)))
+        throw CryptoException(std::string("Unable to set CRL update time: ") + gnutls_strerror(err));
    if (auto err = gnutls_x509_crl_sign2(crl, ca.cert, key.x509_key, GNUTLS_DIG_SHA512, 0))
        throw CryptoException(std::string("Unable to sign certificate revocation list: ") + gnutls_strerror(err));
    // to be able to actually use the CRL we need to serialize/deserialize it
@@ -2270,16 +2270,8 @@ Dht::onDisconnected()
 void
 Dht::bootstrap()
 {
-    if (dht4.status != NodeStatus::Disconnected || dht6.status != NodeStatus::Disconnected) {
-        // The job that led here has already run, and the scheduler does not
-        // clear the handle to a job it has executed. onDisconnected() reads a
-        // set handle as "a bootstrap is already scheduled" and does nothing,
-        // so leaving it set here means the node never tries to rejoin the
-        // network once it has lost it. Clearing it is what says that no
-        // bootstrap is pending any more.
-        bootstrapJob.reset();
+    if (dht4.status != NodeStatus::Disconnected || dht6.status != NodeStatus::Disconnected)
        return;
-    }
    if (logger_)
        logger_->debug("[{}] Bootstraping", myid.to_view());
    bootstrap_pending = false;
@@ -2363,9 +2355,6 @@ Dht::confirmNodes()
 std::vector<ValuesExport>
 Dht::exportValues() const
 {
-    const auto& now = scheduler.time();
-    const auto system_now = system_clock::now();
-
    std::vector<ValuesExport> e {};
    e.reserve(store.size());
    for (const auto& h : store) {
@@ -2378,7 +2367,7 @@ Dht::exportValues() const
        pk.pack_array(vals.size());
        for (const auto& v : vals) {
            pk.pack_array(4);
-            pk.pack(to_system_time(v.created, now, system_now));
+            pk.pack(v.created.time_since_epoch().count());
            v.data->msgpack_pack(pk);
            if (const auto& store_addr = v.store_bucket ? v.store_bucket->getAddr() : SockAddr {}) {
                pk.pack_bin(store_addr.getLength());
@@ -2386,7 +2375,7 @@ Dht::exportValues() const
            } else {
                pk.pack_bin(0);
            }
-            pk.pack(to_system_time(v.expiration, now, system_now));
+            pk.pack(v.expiration.time_since_epoch().count());
        }
        ve.second = {buffer.data(), buffer.data() + buffer.size()};
        e.push_back(std::move(ve));
@@ -2398,7 +2387,6 @@ void
 Dht::importValues(const std::vector<ValuesExport>& import)
 {
    const auto& now = scheduler.time();
-    const auto system_now = system_clock::now();

    unsigned imported = 0, ignored = 0;
    size_t imported_size = 0;
@@ -2423,15 +2411,8 @@ Dht::importValues(const std::vector<ValuesExport>& import)
                Value tmp_val;
                SockAddr store_addr;
                try {
-                    const bool uses_system_time = valel.via.array.ptr[0].type == msgpack::type::EXT;
-                    if (uses_system_time) {
-                        val_time = from_system_time(valel.via.array.ptr[0].as<system_clock::time_point>(),
-                                                    now,
-                                                    system_now);
-                    } else {
-                        val_time = time_point {
-                            time_point::duration {valel.via.array.ptr[0].as<time_point::duration::rep>()}};
-                    }
+                    val_time = time_point {
+                        time_point::duration {valel.via.array.ptr[0].as<time_point::duration::rep>()}};
                    tmp_val.msgpack_unpack(valel.via.array.ptr[1]);
                    if (valel.via.array.size >= 3) {
                        auto addr_blob = valel.via.array.ptr[2].as<Blob>();
@@ -2441,14 +2422,8 @@ Dht::importValues(const std::vector<ValuesExport>& import)
                        }
                    }
                    if (valel.via.array.size >= 4) {
-                        if (uses_system_time) {
-                            expiration = from_system_time(valel.via.array.ptr[3].as<system_clock::time_point>(),
-                                                          now,
-                                                          system_now);
-                        } else {
-                            expiration = time_point {
-                                time_point::duration {valel.via.array.ptr[3].as<time_point::duration::rep>()}};
-                        }
+                        expiration = time_point {
+                            time_point::duration {valel.via.array.ptr[3].as<time_point::duration::rep>()}};
                    }
                } catch (const std::exception&) {
                    if (logger_)
@@ -1205,7 +1205,14 @@ DhtProxyServer::sendPushNotification(
    try {
        std::shared_ptr<http::Request> request;
        if (type == PushType::UnifiedPush) {
-            request = std::make_shared<http::Request>(io_context(), token, logger_);
+            http::Url tokenUrl(token);
+            request = std::make_shared<http::Request>(io_context(),
+                                                      concat(tokenUrl.protocol, "://"sv, tokenUrl.host),
+                                                      tokenUrl.service,
+                                                      tokenUrl.protocol.find("https") == 0,
+                                                      logger_);
+            request->set_target(tokenUrl.target);
+            request->set_header_field(restinio::http_field_t::host, std::string(tokenUrl.host));
        } else {
            request = std::make_shared<http::Request>(io_context(),
                                                      pushHostPort_.first,
@@ -1224,8 +1231,8 @@ DhtProxyServer::sendPushNotification(
            Blob auth;   ///< Auth secret
            auto delim = topicView.find('|');
            if (delim != std::string_view::npos) {
-                pubKey = base64_default_or_url_decode(topicView.substr(0, delim));
-                auth = base64_default_or_url_decode(topicView.substr(delim + 1));
+                pubKey = base64_decode(topicView.substr(0, delim));
+                auth = base64_decode(topicView.substr(delim + 1));
            }

            request->set_header_field(restinio::http_field_t::ttl, "86400");
@@ -21,6 +21,16 @@ namespace dht {

 using namespace std::literals;

+constexpr auto PEER_DISCOVERY_DHT_SERVICE = "dht"sv;
+
+struct NodeInsertionPack
+{
+    dht::InfoHash nodeId;
+    in_port_t port;
+    dht::NetId net;
+    MSGPACK_DEFINE(nodeId, port, net)
+};
+
 DhtRunner::DhtRunner()
    : dht_()
 {
@@ -89,11 +99,6 @@ DhtRunner::run(const Config& config, Context&& context)
        auto state_path = config.dht_config.node_config.persist_path;
        if (not state_path.empty())
            state_path += "_port.txt";
-        // Ports loaded from the persisted state are a best-effort hint to keep a
-        // stable identity across restarts; remember which ones we set so that we
-        // can fall back to random ports if they are already in use (e.g. a fast
-        // restart while the previous instance still holds them).
-        bool triedSavedPort = false;
        if (not state_path.empty() && (local4.getPort() == 0 || local6.getPort() == 0)) {
            std::ifstream inConfig(state_path);
            if (inConfig.is_open()) {
@@ -105,7 +110,6 @@ DhtRunner::run(const Config& config, Context&& context)
                                              fmt::ptr(this),
                                              port);
                        local4.setPort(port);
-                        triedSavedPort = true;
                    }
                }
                if (inConfig >> port) {
@@ -115,7 +119,6 @@ DhtRunner::run(const Config& config, Context&& context)
                                              fmt::ptr(this),
                                              port);
                        local6.setPort(port);
-                        triedSavedPort = true;
                    }
                }
            }
@@ -133,20 +136,7 @@ DhtRunner::run(const Config& config, Context&& context)

        if (config.proxy_server.empty()) {
            if (not context.sock) {
-                try {
-                    context.sock.reset(new net::UdpSocket(local4, local6, context.logger));
-                } catch (const DhtException&) {
-                    if (not triedSavedPort)
-                        throw;
-                    // The saved ports are unavailable (typically still held by a
-                    // previous instance): fall back to OS-assigned ports.
-                    if (context.logger)
-                        context.logger->w("[runner %p] Saved ports unavailable, falling back to random ports",
-                                          fmt::ptr(this));
-                    local4.setPort(0);
-                    local6.setPort(0);
-                    context.sock.reset(new net::UdpSocket(local4, local6, context.logger));
-                }
+                context.sock.reset(new net::UdpSocket(local4, local6, context.logger));
            }
            context.sock->setOnReceive([&](net::PacketList&& pkts) {
                net::PacketList ret;
@@ -237,7 +227,7 @@ DhtRunner::run(const Config& config, Context&& context)
        if (config.peer_discovery or config.peer_publish) {
 #ifdef OPENDHT_PEER_DISCOVERY
            peerDiscovery_ = context.peerDiscovery ? std::move(context.peerDiscovery)
-                                                   : std::make_shared<PeerDiscovery>(nullptr, context.logger);
+                                                   : std::make_shared<PeerDiscovery>();
 #else
            std::cerr << "Peer discovery requested but OpenDHT built without peer discovery support." << std::endl;
 #endif
@@ -246,22 +236,32 @@ DhtRunner::run(const Config& config, Context&& context)
 #ifdef OPENDHT_PEER_DISCOVERY
        auto netId = config.dht_config.node_config.network;
        if (config.peer_discovery) {
-            peerDiscovery_->startDiscovery(netId, [this](const InfoHash& nodeId, SockAddr&& address) {
-                if (nodeId != dht_->getNodeId())
-                    bootstrap(nodeId, address);
-            });
+            peerDiscovery_->startDiscovery<NodeInsertionPack>(PEER_DISCOVERY_DHT_SERVICE,
+                                                              [this, netId](NodeInsertionPack&& v, SockAddr&& addr) {
+                                                                  addr.setPort(v.port);
+                                                                  if (v.nodeId != dht_->getNodeId() && netId == v.net) {
+                                                                      bootstrap(v.nodeId, addr);
+                                                                  }
+                                                              });
        }
        if (config.peer_publish) {
+            msgpack::sbuffer sbuf_node;
+            NodeInsertionPack adc;
+            adc.net = netId;
+            adc.nodeId = dht_->getNodeId();
            if (auto socket = dht_->getSocket()) {
-                const auto& bound4 = socket->getBoundRef(AF_INET);
-                const auto& bound6 = socket->getBoundRef(AF_INET6);
-                const auto port4 = bound4 ? bound4.getPort() : 0;
-                const auto port6 = bound6 ? bound6.getPort() : 0;
-                if (port4 and port6 and port4 != port6) {
-                    if (logger_)
-                        logger_->error("Unable to publish peer discovery with different IPv4 and IPv6 ports");
-                } else if (const auto port = port4 ? port4 : port6) {
-                    peerDiscovery_->startPublish(dht_->getNodeId(), netId, port);
+                // IPv4
+                if (const auto& bound4 = socket->getBoundRef(AF_INET)) {
+                    adc.port = bound4.getPort();
+                    msgpack::pack(sbuf_node, adc);
+                    peerDiscovery_->startPublish(AF_INET, PEER_DISCOVERY_DHT_SERVICE, sbuf_node);
+                }
+                // IPv6
+                if (const auto& bound6 = socket->getBoundRef(AF_INET6)) {
+                    adc.port = bound6.getPort();
+                    sbuf_node.clear();
+                    msgpack::pack(sbuf_node, adc);
+                    peerDiscovery_->startPublish(AF_INET6, PEER_DISCOVERY_DHT_SERVICE, sbuf_node);
                }
            }
        }
@@ -534,14 +534,8 @@ DhtRunner::registerInsecureType(const ValueType& type)
 void
 DhtRunner::importValues(const std::vector<ValuesExport>& values)
 {
-    {
-        std::lock_guard lck(dht_mtx);
-        dht_->importValues(values);
-    }
-    // Recompute the runner wakeup after import schedules value expirations.
-    std::lock_guard lck(storage_mtx);
-    pending_ops_prio.emplace([](SecureDht&) {});
-    cv.notify_all();
+    std::lock_guard lck(dht_mtx);
+    dht_->importValues(values);
 }

 unsigned
@@ -42,8 +42,8 @@ constexpr std::string_view ORIGIN_PROTOCOL {"//"sv};
 constexpr const char HTTP_HEADER_DELIM[] = "\r\n\r\n";
 constexpr unsigned MAX_REDIRECTS {5};

-Url::Url(std::string url_str)
-    : url(std::move(url_str))
+Url::Url(std::string_view url_str)
+    : url(url_str)
 {
    std::string_view u = url;
    if (u.empty())
@@ -302,13 +302,13 @@ static X509*
 issuer_from_chain(STACK_OF(X509) * fullchain)
 {
    X509 *cert, *issuer;
-    const X509_NAME* issuer_name;
+    X509_NAME* issuer_name;

    cert = cert_from_chain(fullchain);
    if ((issuer_name = X509_get_issuer_name(cert)) == nullptr)
        return nullptr;

-    issuer = X509_find_by_subject(fullchain, const_cast<X509_NAME*>(issuer_name));
+    issuer = X509_find_by_subject(fullchain, issuer_name);
    return issuer;
 }

@@ -830,8 +830,8 @@ Connection::timeout(const std::chrono::seconds& timeout, HandlerCb cb)

 // Resolver

-Resolver::Resolver(asio::io_context& ctx, std::string url, std::shared_ptr<dht::Logger> logger)
-    : url_(std::move(url))
+Resolver::Resolver(asio::io_context& ctx, const std::string& url, std::shared_ptr<dht::Logger> logger)
+    : url_(url)
    , resolver_(ctx)
    , destroyed_(std::make_shared<bool>(false))
    , logger_(logger)
@@ -917,16 +917,8 @@ Resolver::add_callback(ResolverCb cb, sa_family_t family)
                                               else
                                                   cb(ec, filter(endpoints, family));
                                           });
-    else {
-        // Always dispatch the callback on the io_context thread. Invoking it
-        // synchronously would run the caller's continuation (e.g. the whole
-        // connect chain of Request::send) on the calling thread, mutating asio
-        // objects concurrently with the io thread running the io_context.
-        asio::post(resolver_.get_executor(),
-                   [cb = std::move(cb),
-                    ec = ec_,
-                    endpoints = family == AF_UNSPEC ? endpoints_ : filter(endpoints_, family)] { cb(ec, endpoints); });
-    }
+    else
+        cb(ec_, family == AF_UNSPEC ? endpoints_ : filter(endpoints_, family));
 }

 void
@@ -975,14 +967,14 @@ Resolver::resolve(std::string_view host, std::string_view service)
 std::atomic_uint Request::ids_ {1};

 Request::Request(asio::io_context& ctx,
-                 std::string url,
+                 const std::string& url,
                 const Json::Value& json,
                 OnJsonCb jsoncb,
                 std::shared_ptr<dht::Logger> logger)
    : logger_(std::move(logger))
    , id_(Request::ids_++)
    , ctx_(ctx)
-    , resolver_(std::make_shared<Resolver>(ctx, std::move(url), logger))
+    , resolver_(std::make_shared<Resolver>(ctx, url, logger))
 {
    init_default_headers();
    set_header_field(restinio::http_field_t::content_type, std::string(HTTP_HEADER_CONTENT_TYPE_JSON));
@@ -1005,11 +997,11 @@ Request::Request(asio::io_context& ctx,
    });
 }

-Request::Request(asio::io_context& ctx, std::string url, OnJsonCb jsoncb, std::shared_ptr<dht::Logger> logger)
+Request::Request(asio::io_context& ctx, const std::string& url, OnJsonCb jsoncb, std::shared_ptr<dht::Logger> logger)
    : logger_(std::move(logger))
    , id_(Request::ids_++)
    , ctx_(ctx)
-    , resolver_(std::make_shared<Resolver>(ctx, std::move(url), logger))
+    , resolver_(std::make_shared<Resolver>(ctx, url, logger))
 {
    init_default_headers();
    set_header_field(restinio::http_field_t::accept, std::string(HTTP_HEADER_CONTENT_TYPE_JSON));
@@ -1030,20 +1022,20 @@ Request::Request(asio::io_context& ctx, std::string url, OnJsonCb jsoncb, std::s
    });
 }

-Request::Request(asio::io_context& ctx, std::string url, std::shared_ptr<dht::Logger> logger)
+Request::Request(asio::io_context& ctx, const std::string& url, std::shared_ptr<dht::Logger> logger)
    : logger_(logger)
    , id_(Request::ids_++)
    , ctx_(ctx)
-    , resolver_(std::make_shared<Resolver>(ctx, std::move(url), logger))
+    , resolver_(std::make_shared<Resolver>(ctx, url, logger))
 {
    init_default_headers();
 }

-Request::Request(asio::io_context& ctx, std::string url, OnDoneCb onDone, std::shared_ptr<dht::Logger> logger)
+Request::Request(asio::io_context& ctx, const std::string& url, OnDoneCb onDone, std::shared_ptr<dht::Logger> logger)
    : logger_(logger)
    , id_(Request::ids_++)
    , ctx_(ctx)
-    , resolver_(std::make_shared<Resolver>(ctx, std::move(url), logger))
+    , resolver_(std::make_shared<Resolver>(ctx, url, logger))
 {
    init_default_headers();
    add_on_done_callback(std::move(onDone));
@@ -1094,6 +1086,7 @@ Request::Request(asio::io_context& ctx,
    , family_(family)
    , resolver_(resolver)
 {
+    set_header_field(restinio::http_field_t::host, concat(get_url().host, ":", get_url().service));
    set_target(Url(target).target);
 }

@@ -40,44 +40,8 @@ struct NetworkEngine::PartialMessage
    time_point start;
    time_point last_part;
    std::unique_ptr<ParsedMessage> msg;
-    std::vector<std::unique_ptr<ParsedMessage>> early_parts;
-    size_t early_bytes {};
-    bool request_quota_consumed {};
 };

-bool
-NetworkEngine::isExpectedReply(const ParsedMessage& msg, const SockAddr& from)
-{
-    auto request = requests.find(msg.tid);
-    if (request != requests.end() && request->second->pending() && !request->second->node->id
-        && request->second->node->getAddr() == from)
-        return true;
-
-    auto node = cache.getNode(msg.id, from.getFamily());
-    if (!node || node->getAddr() != from)
-        return false;
-
-    auto pending = node->getRequest(msg.tid);
-    return (pending && pending->pending()) || node->getSocket(msg.tid);
-}
-
-bool
-NetworkEngine::tryCompleteMessage(PartialMessage& partial, const SockAddr& from)
-{
-    try {
-        if (!partial.msg->complete())
-            return false;
-        process(std::move(partial.msg), from);
-    } catch (const std::exception& e) {
-        if (logger_)
-            logger_->warn("Error while processing partial message: {}", e.what());
-    } catch (...) {
-        if (logger_)
-            logger_->warn("Unknown error while processing partial message");
-    }
-    return true;
-}
-
 std::vector<Blob>
 serializeValues(const std::vector<Sp<Value>>& st)
 {
@@ -502,58 +466,35 @@ NetworkEngine::processMessage(const uint8_t* buf, size_t buflen, SockAddr f)

    // partial value data
    if (msg->type == MessageType::ValueData) {
-        if (msg->fragment_parts.empty()
-            || std::any_of(msg->fragment_parts.begin(), msg->fragment_parts.end(), [](const auto& fragment) {
-                   return fragment.second.second.empty();
-               })) {
+        auto pmsg_it = partial_messages.find(msg->tid);
+        if (pmsg_it == partial_messages.end()) {
+            if (logIncoming_)
+                if (logger_)
+                    logger_->debug("Unable to find partial message");
            rateLimit(from);
            return;
        }
-        PartialMessageKey key {from, msg->tid};
-        auto pmsg_it = partial_messages.find(key);
-        if (pmsg_it == partial_messages.end()) {
-            if (!rateLimit(from))
-                return;
-            auto inserted = partial_messages.emplace(key, PartialMessage {});
-            pmsg_it = inserted.first;
-            pmsg_it->second.from = from;
-            pmsg_it->second.start = now;
-            pmsg_it->second.last_part = now;
-            pmsg_it->second.request_quota_consumed = true;
-            scheduler.add(now + RX_MAX_PACKET_TIME, std::bind(&NetworkEngine::maintainRxBuffer, this, key));
-        }
-        auto& pmsg = pmsg_it->second;
-        if (!pmsg.msg) {
-            if (pmsg.early_parts.size() >= RX_MAX_EARLY_PARTS) {
-                partial_messages.erase(pmsg_it);
-                return;
-            }
-            size_t fragment_bytes {};
-            for (const auto& [index, fragment] : msg->fragment_parts) {
-                (void) index;
-                if (fragment.second.size() > RX_MAX_EARLY_BYTES - fragment_bytes) {
-                    partial_messages.erase(pmsg_it);
-                    return;
-                }
-                fragment_bytes += fragment.second.size();
-            }
-            if (fragment_bytes > RX_MAX_EARLY_BYTES - pmsg.early_bytes) {
-                partial_messages.erase(pmsg_it);
-                return;
-            }
-            pmsg.early_bytes += fragment_bytes;
-            pmsg.early_parts.emplace_back(std::move(msg));
-            pmsg.last_part = now;
-            scheduler.add(now + RX_TIMEOUT, std::bind(&NetworkEngine::maintainRxBuffer, this, key));
+        if (!pmsg_it->second.from.equals(from)) {
+            if (logger_)
+                logger_->debug("Received partial message data from unexpected IP address");
+            rateLimit(from);
            return;
        }
        // append data block
-        if (pmsg.msg->append(*msg)) {
-            pmsg.last_part = now;
-            if (tryCompleteMessage(pmsg, from)) {
+        if (pmsg_it->second.msg->append(*msg)) {
+            pmsg_it->second.last_part = now;
+            // check data completion
+            if (pmsg_it->second.msg->complete()) {
+                try {
+                    // process the full message
+                    process(std::move(pmsg_it->second.msg), from);
+                } catch (const std::exception& e) {
+                    if (logger_)
+                        logger_->warn("Error while processing partial message: {}", e.what());
+                }
                partial_messages.erase(pmsg_it);
            } else
-                scheduler.add(now + RX_TIMEOUT, std::bind(&NetworkEngine::maintainRxBuffer, this, key));
+                scheduler.add(now + RX_TIMEOUT, std::bind(&NetworkEngine::maintainRxBuffer, this, msg->tid));
        }
        return;
    }
@@ -564,32 +505,7 @@ NetworkEngine::processMessage(const uint8_t* buf, size_t buflen, SockAddr f)
        return;
    }

-    if (msg->value_parts.empty()) {
-        if (msg->type > MessageType::Reply) {
-            /* Rate limit requests. */
-            if (!rateLimit(from)) {
-                if (logger_)
-                    logger_->warn("Dropping request due to rate limiting");
-                return;
-            }
-        }
-        try {
-            process(std::move(msg), from);
-        } catch (const std::exception& e) {
-            if (logger_)
-                logger_->warn("Error while processing message: {}", e.what());
-        }
-        return;
-    }
-
-    PartialMessageKey partial_key {from, msg->tid};
-    if (msg->type == MessageType::Reply && !isExpectedReply(*msg, from))
-        return;
-
-    const auto partial = partial_messages.find(partial_key);
-    const bool request_quota_consumed = partial != partial_messages.end() && !partial->second.msg
-                                        && partial->second.request_quota_consumed;
-    if (msg->type > MessageType::Reply && !request_quota_consumed) {
+    if (msg->type > MessageType::Reply) {
        /* Rate limit requests. */
        if (!rateLimit(from)) {
            if (logger_)
@@ -598,28 +514,28 @@ NetworkEngine::processMessage(const uint8_t* buf, size_t buflen, SockAddr f)
        }
    }

-    // starting partial message session
-    auto inserted = partial_messages.emplace(partial_key, PartialMessage {});
-    auto& pmsg = inserted.first->second;
-    if (not pmsg.msg) {
-        if (inserted.second) {
+    if (msg->value_parts.empty()) {
+        try {
+            process(std::move(msg), from);
+        } catch (const std::exception& e) {
+            if (logger_)
+                logger_->warn("Error while processing message: {}", e.what());
+            return;
+        }
+    } else {
+        // starting partial message session
+        auto k = msg->tid;
+        auto& pmsg = partial_messages[k];
+        if (not pmsg.msg) {
            pmsg.from = from;
+            pmsg.msg = std::move(msg);
            pmsg.start = now;
-            scheduler.add(now + RX_MAX_PACKET_TIME, std::bind(&NetworkEngine::maintainRxBuffer, this, partial_key));
-        }
-        pmsg.msg = std::move(msg);
-        pmsg.last_part = now;
-        for (const auto& part : pmsg.early_parts)
-            pmsg.msg->append(*part);
-        pmsg.early_parts.clear();
-        pmsg.early_bytes = 0;
-        if (tryCompleteMessage(pmsg, from)) {
-            partial_messages.erase(inserted.first);
-        } else {
-            scheduler.add(now + RX_TIMEOUT, std::bind(&NetworkEngine::maintainRxBuffer, this, partial_key));
-        }
-    } else if (logger_)
-        logger_->error("Partial message from {} with given TID {} already exists", from.toString(), msg->tid);
+            pmsg.last_part = now;
+            scheduler.add(now + RX_MAX_PACKET_TIME, std::bind(&NetworkEngine::maintainRxBuffer, this, k));
+            scheduler.add(now + RX_TIMEOUT, std::bind(&NetworkEngine::maintainRxBuffer, this, k));
+        } else if (logger_)
+            logger_->error("Partial message with given TID {} already exists", k);
+    }
 }

 void
@@ -1698,9 +1614,9 @@ NetworkEngine::sendError(const SockAddr& addr, Tid tid, uint16_t code, const std
 }

 void
-NetworkEngine::maintainRxBuffer(const PartialMessageKey& key)
+NetworkEngine::maintainRxBuffer(Tid tid)
 {
-    auto msg = partial_messages.find(key);
+    auto msg = partial_messages.find(tid);
    if (msg != partial_messages.end()) {
        const auto& now = scheduler.time();
        if (msg->second.start + RX_MAX_PACKET_TIME < now || msg->second.last_part + RX_TIMEOUT < now) {
@@ -224,7 +224,7 @@ SearchCache::expire(const time_point& now, const std::function<void(size_t)>& on
    auto ret = nextExpiration_;
    for (auto it = ops.begin(); it != ops.end();) {
        auto expiration = it->second->getExpiration();
-        if (expiration <= now) {
+        if (expiration < now) {
            auto cache = std::move(it->second);
            it = ops.erase(it);
            onCancel(cache->searchToken);
@@ -274,21 +274,14 @@ ParsedMessage::msgpack_unpack(const msgpack::object& msg)

    if (!parsed.a && !parsed.r && !parsed.e && !parsed.u)
        throw msgpack::type_error();
+    auto& req = parsed.a ? *parsed.a : (parsed.r ? *parsed.r : (parsed.u ? *parsed.u : *parsed.e));

    if (parsed.e) {
-        if (parsed.e->type != msgpack::type::ARRAY or parsed.e->via.array.size < 1)
+        if (parsed.e->type != msgpack::type::ARRAY)
            throw msgpack::type_error();
        error_code = parsed.e->via.array.ptr[0].as<uint16_t>();
    }

-    /* An error-only message carries no request map. The error array must never
-       be reached through the map view of the msgpack object union, and a
-       request field that is not a map must be rejected rather than
-       reinterpreted. */
-    const msgpack::object* req = parsed.a ? parsed.a : (parsed.r ? parsed.r : parsed.u);
-    if (req and req->type != msgpack::type::MAP)
-        throw msgpack::type_error();
-
    struct ParsedReq
    {
        msgpack::object* values;
@@ -297,9 +290,8 @@ ParsedMessage::msgpack_unpack(const msgpack::object& msg)
        msgpack::object* want;
    } parsedReq {};

-    const uint32_t req_size = req ? req->via.map.size : 0;
-    for (unsigned i = 0; i < req_size; i++) {
-        auto& o = req->via.map.ptr[i];
+    for (unsigned i = 0; i < req.via.map.size; i++) {
+        auto& o = req.via.map.ptr[i];
        if (o.key.type != msgpack::type::STR)
            continue;
        auto key = o.key.as<std::string_view>();
@@ -378,8 +370,6 @@ ParsedMessage::msgpack_unpack(const msgpack::object& msg)
    } else if (parsedReq.fields) {
        if (auto rfields = findMapValue(*parsedReq.fields, "f"sv)) {
            auto vfields = rfields->as<std::set<Value::Field>>();
-            if (vfields.empty())
-                throw msgpack::type_error();
            if (auto rvalues = findMapValue(*parsedReq.fields, "v"sv)) {
                if (rvalues->type != msgpack::type::ARRAY)
                    throw msgpack::type_error();
@@ -0,0 +1,474 @@
+// Copyright (c) 2014-2026 Savoir-faire Linux Inc.
+// SPDX-License-Identifier: MIT
+
+#include "peer_discovery.h"
+#include "network_utils.h"
+#include "utils.h"
+
+#ifdef __ANDROID__
+#include "compat/getif_workaround_android.h"
+#endif
+
+#include <asio.hpp>
+
+using namespace std::literals;
+
+namespace dht {
+
+// Organization-local Scope multicast
+constexpr char MULTICAST_ADDRESS_IPV4[] = "239.192.0.1";
+constexpr char MULTICAST_ADDRESS_IPV6[] = "ff08::101";
+
+class PeerDiscovery::DomainPeerDiscovery
+{
+public:
+    DomainPeerDiscovery(asio::ip::udp domain,
+                        in_port_t port,
+                        Sp<asio::io_context> ioContext = {},
+                        Sp<Logger> logger = {});
+    ~DomainPeerDiscovery();
+
+    void startDiscovery(std::string_view type, ServiceDiscoveredCallback callback);
+    void startPublish(std::string_view type, const msgpack::sbuffer& pack_buf);
+
+    void stop();
+
+    bool stopDiscovery(std::string_view type);
+    bool stopPublish(std::string_view type);
+
+    void connectivityChanged();
+
+    void stopConnectivityChanged();
+
+private:
+    Sp<Logger> logger_;
+    // dmtx_ for callbackmap_ and drunning_ (write)
+    std::mutex dmtx_;
+    // mtx_ for messages_ and lrunning (listen)
+    std::mutex mtx_;
+    std::shared_ptr<asio::io_context> ioContext_;
+
+    static constexpr dht::duration PeerDiscovery_PERIOD_MAX {std::chrono::minutes(1)};
+    static constexpr std::chrono::seconds PeerDiscovery_PERIOD {10};
+    asio::steady_timer peerDiscoveryTimer;
+    std::chrono::steady_clock::duration peerDiscovery_period {PeerDiscovery_PERIOD};
+
+    asio::ip::udp::socket sockFd_;
+    asio::ip::udp::endpoint sockAddrSend_;
+
+    std::array<char, 64 * 1024> receiveBuf_;
+    asio::ip::udp::endpoint receiveFrom_;
+
+    msgpack::sbuffer sbuf_;
+    std::map<std::string, msgpack::sbuffer, std::less<>> messages_;
+    std::map<std::string, ServiceDiscoveredCallback, std::less<>> callbackmap_;
+    bool lrunning_ {false};
+    bool drunning_ {false};
+
+    void loopListener();
+    void query(const asio::ip::udp::endpoint& peer);
+    void reloadMessages();
+
+    void stopDiscovery();
+    void stopPublish();
+
+    void publish(const asio::ip::udp::endpoint& peer);
+
+    void reDiscover();
+};
+
+PeerDiscovery::DomainPeerDiscovery::DomainPeerDiscovery(asio::ip::udp domain,
+                                                        in_port_t port,
+                                                        Sp<asio::io_context> ioContext,
+                                                        Sp<Logger> logger)
+    : logger_(logger)
+    , ioContext_(ioContext)
+    , peerDiscoveryTimer(*ioContext_)
+    , sockFd_(*ioContext_, domain)
+    , sockAddrSend_(asio::ip::make_address(domain.family() == AF_INET ? MULTICAST_ADDRESS_IPV4 : MULTICAST_ADDRESS_IPV6),
+                    port)
+{
+    try {
+        sockFd_.set_option(asio::ip::multicast::join_group(sockAddrSend_.address()));
+        sockFd_.set_option(asio::ip::udp::socket::reuse_address(true));
+        sockFd_.bind({domain, port});
+    } catch (const std::exception& e) {
+#ifdef __ANDROID__
+        if (domain.family() == AF_INET && strcmp(e.what(), "set_option: No such device") == 0) {
+            try {
+                sockFd_.set_option(asio::ip::udp::socket::reuse_address(true));
+                auto mc_interface = workaround::get_interface();
+                sockFd_.set_option(asio::ip::multicast::outbound_interface(mc_interface));
+                sockFd_.set_option(asio::ip::multicast::join_group(sockAddrSend_.address().to_v4(), mc_interface));
+                sockFd_.bind({domain, port});
+            } catch (const std::exception& e) {
+                if (logger_)
+                    logger_->error("Unable to start peer discovery using android workaround: {}", e.what());
+            }
+        } else
+#endif
+            if (logger_)
+            logger_->error("Unable to start peer discovery for {}: {}",
+                           domain.family() == AF_INET ? "IPv4" : "IPv6",
+                           e.what());
+    }
+}
+
+PeerDiscovery::DomainPeerDiscovery::~DomainPeerDiscovery()
+{
+    stop();
+    sockFd_.close();
+}
+
+void
+PeerDiscovery::DomainPeerDiscovery::startDiscovery(std::string_view type, ServiceDiscoveredCallback callback)
+{
+    std::lock_guard lck(dmtx_);
+    callbackmap_[std::string(type)] = callback;
+    if (not drunning_) {
+        drunning_ = true;
+        asio::post(*ioContext_, [this]() {
+            loopListener();
+            query(sockAddrSend_);
+        });
+    }
+}
+
+void
+PeerDiscovery::DomainPeerDiscovery::loopListener()
+{
+    std::lock_guard lck(dmtx_);
+    if (not drunning_)
+        return;
+    sockFd_.async_receive_from(asio::buffer(receiveBuf_),
+                               receiveFrom_,
+                               [this](const asio::error_code& error, size_t bytes) {
+                                   if (error == asio::error::operation_aborted)
+                                       return;
+                                   if (error) {
+                                       if (logger_)
+                                           logger_->error("Error receiving message: {}", error.message());
+                                   }
+                                   try {
+                                       auto rcv = msgpack::unpack(receiveBuf_.data(), bytes);
+                                       msgpack::object obj = rcv.get();
+
+                                       if (obj.type == msgpack::type::STR) {
+                                           if (lrunning_ and obj.as<std::string_view>() == "q"sv)
+                                               publish(receiveFrom_);
+                                       } else if (obj.type == msgpack::type::MAP) {
+                                           for (unsigned i = 0; i < obj.via.map.size; i++) {
+                                               auto& o = obj.via.map.ptr[i];
+                                               if (o.key.type != msgpack::type::STR)
+                                                   continue;
+                                               ServiceDiscoveredCallback cb;
+                                               {
+                                                   std::lock_guard lck(dmtx_);
+                                                   if (drunning_) {
+                                                       auto callback = callbackmap_.find(o.key.as<std::string_view>());
+                                                       if (callback != callbackmap_.end())
+                                                           cb = callback->second;
+                                                   } else
+                                                       return;
+                                               }
+                                               if (cb)
+                                                   cb(std::move(o.val),
+                                                      SockAddr {receiveFrom_.data(), (socklen_t) receiveFrom_.size()});
+                                           }
+                                       } else {
+                                           throw msgpack::type_error {};
+                                       }
+                                   } catch (const std::exception& e) {
+                                       if (logger_)
+                                           logger_->error("Error receiving packet: {}", e.what());
+                                   }
+                                   loopListener();
+                               });
+}
+
+void
+PeerDiscovery::DomainPeerDiscovery::query(const asio::ip::udp::endpoint& peer)
+{
+    std::lock_guard lck(dmtx_);
+    if (not drunning_)
+        return;
+
+    msgpack::sbuffer pbuf_request;
+    msgpack::pack(pbuf_request, "q");
+
+    sockFd_.async_send_to(asio::buffer(pbuf_request.data(), pbuf_request.size()),
+                          peer,
+                          [logger = logger_, peer](const asio::error_code& ec, size_t) {
+                              if (ec and (ec != asio::error::operation_aborted) and logger)
+                                  logger->warn("Error sending packet to: {} with err: {}",
+                                               peer.address().to_string(),
+                                               ec.message());
+                          });
+}
+
+void
+PeerDiscovery::DomainPeerDiscovery::publish(const asio::ip::udp::endpoint& peer)
+{
+    std::lock_guard lck(mtx_);
+    if (not lrunning_)
+        return;
+
+    sockFd_.async_send_to(asio::buffer((const void*) sbuf_.data(), sbuf_.size()),
+                          peer,
+                          [logger = logger_, peer](const asio::error_code& ec, size_t) {
+                              if (ec and (ec != asio::error::operation_aborted) and logger)
+                                  logger->warn("Error sending packet to: {} with err: {}",
+                                               peer.address().to_string(),
+                                               ec.message());
+                          });
+}
+
+void
+PeerDiscovery::DomainPeerDiscovery::startPublish(std::string_view type, const msgpack::sbuffer& pack_buf)
+{
+    msgpack::sbuffer pack_buf_c(pack_buf.size());
+    pack_buf_c.write(pack_buf.data(), pack_buf.size());
+
+    std::lock_guard lck(mtx_);
+    messages_[std::string(type)] = std::move(pack_buf_c);
+    reloadMessages();
+    lrunning_ = true;
+    asio::post(*ioContext_, [this]() { publish(sockAddrSend_); });
+}
+
+bool
+PeerDiscovery::DomainPeerDiscovery::stopDiscovery(std::string_view type)
+{
+    std::lock_guard lck(dmtx_);
+    auto it = callbackmap_.find(type);
+    if (it != callbackmap_.end()) {
+        callbackmap_.erase(it);
+        if (callbackmap_.empty())
+            stopDiscovery();
+        return true;
+    }
+    return false;
+}
+
+bool
+PeerDiscovery::DomainPeerDiscovery::stopPublish(std::string_view type)
+{
+    std::lock_guard lck(mtx_);
+    auto it = messages_.find(type);
+    if (it != messages_.end()) {
+        messages_.erase(it);
+        if (messages_.empty())
+            stopPublish();
+        else
+            reloadMessages();
+        return true;
+    }
+    return false;
+}
+
+void
+PeerDiscovery::DomainPeerDiscovery::stopDiscovery()
+{
+    drunning_ = false;
+}
+
+void
+PeerDiscovery::DomainPeerDiscovery::stopPublish()
+{
+    lrunning_ = false;
+}
+
+void
+PeerDiscovery::DomainPeerDiscovery::stop()
+{
+    {
+        std::lock_guard lck(dmtx_);
+        stopDiscovery();
+    }
+    {
+        std::lock_guard lck(mtx_);
+        stopPublish();
+    }
+}
+
+void
+PeerDiscovery::DomainPeerDiscovery::reloadMessages()
+{
+    sbuf_.clear();
+    msgpack::packer<msgpack::sbuffer> pk(&sbuf_);
+    pk.pack_map(messages_.size());
+    for (const auto& m : messages_) {
+        pk.pack(m.first);
+        sbuf_.write(m.second.data(), m.second.size());
+    }
+}
+
+void
+PeerDiscovery::DomainPeerDiscovery::reDiscover()
+{
+    asio::error_code ec;
+
+    sockFd_.set_option(asio::ip::multicast::join_group(sockAddrSend_.address()), ec);
+    if (ec and logger_)
+        logger_->warn("Unable to multicast on {}: {}", sockAddrSend_.address().to_string(), ec.message());
+    query(sockAddrSend_);
+}
+
+void
+PeerDiscovery::DomainPeerDiscovery::connectivityChanged()
+{
+    asio::post(*ioContext_, [this]() {
+        reDiscover();
+        publish(sockAddrSend_);
+    });
+    if (logger_)
+        logger_->debug("PeerDiscovery: connectivity changed");
+
+    if (peerDiscovery_period == PeerDiscovery_PERIOD_MAX) {
+        peerDiscovery_period = PeerDiscovery_PERIOD;
+    } else {
+        peerDiscoveryTimer.expires_after(peerDiscovery_period);
+        peerDiscoveryTimer.async_wait([this](const asio::error_code& ec) {
+            if (ec == asio::error::operation_aborted)
+                return;
+            connectivityChanged();
+        });
+        peerDiscovery_period = std::min(peerDiscovery_period * 2, PeerDiscovery_PERIOD_MAX);
+    }
+}
+
+void
+PeerDiscovery::DomainPeerDiscovery::stopConnectivityChanged()
+{
+    peerDiscoveryTimer.cancel();
+    peerDiscovery_period = PeerDiscovery_PERIOD;
+}
+
+PeerDiscovery::PeerDiscovery(in_port_t port, Sp<asio::io_context> ioContext, Sp<Logger> logger)
+{
+    if (not ioContext) {
+        ioContext = std::make_shared<asio::io_context>();
+        ioContext_ = ioContext;
+        ioRunnner_ = std::thread([logger, ioContext] {
+            try {
+                if (logger)
+                    logger->d("[peerdiscovery] starting io_context");
+                auto work = asio::make_work_guard(*ioContext);
+                ioContext->run();
+                if (logger)
+                    logger->d("[peerdiscovery] io_context stopped");
+            } catch (const std::exception& ex) {
+                if (logger)
+                    logger->e("[peerdiscovery] run error: %s", ex.what());
+            }
+        });
+    }
+
+    try {
+        peerDiscovery4_.reset(new DomainPeerDiscovery(asio::ip::udp::v4(), port, ioContext, logger));
+    } catch (const std::exception& e) {
+        if (logger)
+            logger->e("[peerdiscovery] Unable to start IPv4: %s", e.what());
+    }
+    try {
+        peerDiscovery6_.reset(new DomainPeerDiscovery(asio::ip::udp::v6(), port, ioContext, logger));
+    } catch (const std::exception& e) {
+        if (logger)
+            logger->e("[peerdiscovery] Unable to start IPv6: %s", e.what());
+    }
+}
+
+PeerDiscovery::~PeerDiscovery()
+{
+    stop();
+    if (ioContext_)
+        ioContext_->stop();
+    if (ioRunnner_.joinable())
+        ioRunnner_.join();
+}
+
+void
+PeerDiscovery::startDiscovery(std::string_view type, ServiceDiscoveredCallback callback)
+{
+    if (peerDiscovery4_)
+        peerDiscovery4_->startDiscovery(type, callback);
+    if (peerDiscovery6_)
+        peerDiscovery6_->startDiscovery(type, callback);
+}
+
+void
+PeerDiscovery::startPublish(std::string_view type, const msgpack::sbuffer& pack_buf)
+{
+    if (peerDiscovery4_)
+        peerDiscovery4_->startPublish(type, pack_buf);
+    if (peerDiscovery6_)
+        peerDiscovery6_->startPublish(type, pack_buf);
+}
+
+void
+PeerDiscovery::startPublish(sa_family_t domain, std::string_view type, const msgpack::sbuffer& pack_buf)
+{
+    if (domain == AF_INET) {
+        if (peerDiscovery4_)
+            peerDiscovery4_->startPublish(type, pack_buf);
+    } else if (domain == AF_INET6) {
+        if (peerDiscovery6_)
+            peerDiscovery6_->startPublish(type, pack_buf);
+    }
+}
+
+void
+PeerDiscovery::stop()
+{
+    if (peerDiscovery4_)
+        peerDiscovery4_->stop();
+    if (peerDiscovery6_)
+        peerDiscovery6_->stop();
+}
+
+bool
+PeerDiscovery::stopDiscovery(std::string_view type)
+{
+    bool stopped4 = peerDiscovery4_ and peerDiscovery4_->stopDiscovery(type);
+    bool stopped6 = peerDiscovery6_ and peerDiscovery6_->stopDiscovery(type);
+    return stopped4 or stopped6;
+}
+
+bool
+PeerDiscovery::stopPublish(std::string_view type)
+{
+    bool stopped4 = peerDiscovery4_ and peerDiscovery4_->stopPublish(type);
+    bool stopped6 = peerDiscovery6_ and peerDiscovery6_->stopPublish(type);
+    return stopped4 or stopped6;
+}
+
+bool
+PeerDiscovery::stopPublish(sa_family_t domain, std::string_view type)
+{
+    if (domain == AF_INET) {
+        return peerDiscovery4_ and peerDiscovery4_->stopPublish(type);
+    } else if (domain == AF_INET6) {
+        return peerDiscovery6_ and peerDiscovery6_->stopPublish(type);
+    }
+    return false;
+}
+
+void
+PeerDiscovery::connectivityChanged()
+{
+    if (peerDiscovery4_)
+        peerDiscovery4_->connectivityChanged();
+    if (peerDiscovery6_)
+        peerDiscovery6_->connectivityChanged();
+}
+
+void
+PeerDiscovery::stopConnectivityChanged()
+{
+    if (peerDiscovery4_)
+        peerDiscovery4_->stopConnectivityChanged();
+    if (peerDiscovery6_)
+        peerDiscovery6_->stopConnectivityChanged();
+}
+
+} /* namespace dht */
@@ -1,504 +0,0 @@
-// Copyright (c) 2014-2026 Savoir-faire Linux Inc.
-// SPDX-License-Identifier: MIT
-
-#include "dns_sd.h"
-
-#include <algorithm>
-#include <charconv>
-#include <map>
-
-namespace dht::mdns::dns_sd {
-namespace {
-
-constexpr std::string_view SERVICE_NAME = "_opendht._udp.local.";
-constexpr std::string_view SERVICE_ENUMERATION_NAME = "_services._dns-sd._udp.local.";
-constexpr std::string_view SERVICE_SUFFIX = "._opendht._udp.local.";
-constexpr std::string_view HOST_SUFFIX = ".local.";
-
-std::vector<uint8_t>
-txtString(std::string value)
-{
-    return {value.begin(), value.end()};
-}
-
-std::string
-asciiLower(std::string_view value)
-{
-    std::string lower;
-    lower.reserve(value.size());
-    for (const auto character : value) {
-        if (character >= 'A' and character <= 'Z')
-            lower.push_back(static_cast<char>(character + ('a' - 'A')));
-        else
-            lower.push_back(character);
-    }
-    return lower;
-}
-
-void
-validateService(const Service& service)
-{
-    if (not service.nodeId)
-        throw ParseError("DNS-SD service requires a node ID");
-    if (service.port == 0)
-        throw ParseError("DNS-SD service requires a port");
-    if (service.addresses.empty())
-        throw ParseError("DNS-SD service requires an address");
-}
-
-Message
-makeAdvertisement(const Service& service, uint32_t serviceTtl, uint32_t hostTtl)
-{
-    validateService(service);
-    const auto instance = instanceName(service.nodeId);
-    const auto host = hostName(service.nodeId);
-
-    Message message;
-    message.response = true;
-    message.authoritative = true;
-    message.answers.push_back({serviceName(), Type::PTR, CLASS_IN, false, serviceTtl, PtrData {instance}});
-    message.additionals.push_back({
-        instance, Type::SRV, CLASS_IN, true, hostTtl, SrvData {0, 0, service.port, host}
-    });
-
-    TxtData txt;
-    txt.strings.emplace_back(txtString("txtvers=1"));
-    txt.strings.emplace_back(txtString("id=" + service.nodeId.toString()));
-    txt.strings.emplace_back(txtString("net=" + std::to_string(service.network)));
-    message.additionals.push_back({instance, Type::TXT, CLASS_IN, true, serviceTtl, std::move(txt)});
-
-    for (const auto& address : service.addresses) {
-        std::visit(
-            [&](const auto& data) {
-                using Data = std::decay_t<decltype(data)>;
-                constexpr auto type = std::is_same_v<Data, AData> ? Type::A : Type::AAAA;
-                message.additionals.push_back({host, type, CLASS_IN, true, hostTtl, data});
-            },
-            address);
-    }
-    return message;
-}
-
-std::optional<InfoHash>
-nodeIdFromInstance(const Name& instance)
-{
-    const auto& labels = instance.labels();
-    const auto service = serviceName();
-    const auto& serviceLabels = service.labels();
-    if (labels.size() != serviceLabels.size() + 1
-        or not std::equal(labels.begin() + 1, labels.end(), serviceLabels.begin(), serviceLabels.end()))
-        return {};
-    if (labels.front().size() != 40)
-        return {};
-    const InfoHash nodeId {labels.front()};
-    if (not nodeId)
-        return {};
-    return nodeId;
-}
-
-struct TxtValues
-{
-    InfoHash nodeId;
-    NetId network {};
-};
-
-std::optional<TxtValues>
-parseTxt(const TxtData& txt)
-{
-    std::map<std::string, std::string> values;
-    for (const auto& raw : txt.strings) {
-        const std::string_view string {reinterpret_cast<const char*>(raw.data()), raw.size()};
-        const auto separator = string.find('=');
-        if (separator == std::string_view::npos or separator == 0)
-            continue;
-        const auto keyView = string.substr(0, separator);
-        if (std::any_of(keyView.begin(), keyView.end(), [](char value) {
-                return value < 0x20 or value > 0x7e or value == '=';
-            }))
-            continue;
-        const auto key = asciiLower(keyView);
-        if ((key == "txtvers" or key == "id" or key == "net") and values.count(key))
-            return {};
-        values.emplace(key, std::string(string.substr(separator + 1)));
-    }
-
-    if (values.size() < 3 or values["txtvers"] != "1" or values["id"].size() != 40)
-        return {};
-    TxtValues parsed;
-    parsed.nodeId = InfoHash {values["id"]};
-    if (not parsed.nodeId)
-        return {};
-    const auto& network = values["net"];
-    const auto result = std::from_chars(network.data(), network.data() + network.size(), parsed.network);
-    if (result.ec != std::errc {} or result.ptr != network.data() + network.size())
-        return {};
-    return parsed;
-}
-
-template<typename Callback>
-void
-forEachRecord(const Message& message, Callback&& callback)
-{
-    for (const auto& record : message.answers)
-        callback(record);
-    for (const auto& record : message.authorities)
-        callback(record);
-    for (const auto& record : message.additionals)
-        callback(record);
-}
-
-bool
-matches(const Question& question, const ResourceRecord& record)
-{
-    return question.name == record.name and (question.type == Type::ANY or question.type == record.type)
-           and (question.classCode == CLASS_ANY or question.classCode == record.classCode);
-}
-
-bool
-sameRecord(const ResourceRecord& lhs, const ResourceRecord& rhs)
-{
-    return lhs.name == rhs.name and lhs.type == rhs.type and lhs.classCode == rhs.classCode and lhs.data == rhs.data;
-}
-
-bool
-isKnownAnswer(const Message& query, const ResourceRecord& record)
-{
-    return std::any_of(query.answers.begin(), query.answers.end(), [&](const ResourceRecord& known) {
-        return sameRecord(known, record) and known.ttl > record.ttl / 2;
-    });
-}
-
-} // namespace
-
-class Cache::Impl
-{
-public:
-    explicit Impl(Now now)
-        : now_(std::move(now))
-    {}
-
-    struct Entry
-    {
-        ResourceRecord record;
-        Clock::time_point expires;
-    };
-
-    std::vector<Service> update(const Message& message)
-    {
-        expire();
-        std::vector<const ResourceRecord*> records;
-        forEachRecord(message, [&](const ResourceRecord& record) { records.push_back(&record); });
-
-        std::vector<const ResourceRecord*> flushed;
-        for (const auto* record : records) {
-            if (not record->cacheFlush)
-                continue;
-            const auto alreadyFlushed = std::any_of(flushed.begin(), flushed.end(), [&](const ResourceRecord* other) {
-                return other->name == record->name and other->type == record->type
-                       and other->classCode == record->classCode;
-            });
-            if (not alreadyFlushed) {
-                flushed.push_back(record);
-                entries_.erase(std::remove_if(entries_.begin(),
-                                              entries_.end(),
-                                              [&](const Entry& entry) {
-                                                  return entry.record.name == record->name
-                                                         and entry.record.type == record->type
-                                                         and entry.record.classCode == record->classCode;
-                                              }),
-                               entries_.end());
-            }
-        }
-
-        for (const auto* record : records) {
-            if (record->ttl == 0) {
-                entries_.erase(std::remove_if(entries_.begin(),
-                                              entries_.end(),
-                                              [&](const Entry& entry) { return sameRecord(entry.record, *record); }),
-                               entries_.end());
-                continue;
-            }
-            const auto expires = now_() + std::chrono::seconds(record->ttl);
-            const auto existing = std::find_if(entries_.begin(), entries_.end(), [&](const Entry& entry) {
-                return sameRecord(entry.record, *record);
-            });
-            if (existing == entries_.end())
-                entries_.push_back({*record, expires});
-            else {
-                existing->record = *record;
-                existing->expires = expires;
-            }
-        }
-
-        auto current = collect();
-        std::vector<Service> discovered;
-        for (const auto& service : current) {
-            if (std::find_if(emitted_.begin(),
-                             emitted_.end(),
-                             [&](const Service& previous) { return equal(previous, service); })
-                == emitted_.end())
-                discovered.push_back(service);
-        }
-        emitted_ = std::move(current);
-        return discovered;
-    }
-
-    std::vector<Service> services()
-    {
-        expire();
-        auto current = collect();
-        emitted_ = current;
-        return current;
-    }
-
-    void clear()
-    {
-        entries_.clear();
-        emitted_.clear();
-    }
-
-private:
-    static bool equal(const Service& lhs, const Service& rhs)
-    {
-        return lhs.nodeId == rhs.nodeId and lhs.network == rhs.network and lhs.port == rhs.port
-               and lhs.addresses == rhs.addresses;
-    }
-
-    void expire()
-    {
-        const auto now = now_();
-        entries_.erase(std::remove_if(entries_.begin(),
-                                      entries_.end(),
-                                      [&](const Entry& entry) { return entry.expires <= now; }),
-                       entries_.end());
-    }
-
-    std::vector<Service> collect() const
-    {
-        std::vector<Service> result;
-        for (const auto& entry : entries_) {
-            if (entry.record.type != Type::PTR or entry.record.classCode != CLASS_IN
-                or entry.record.name != serviceName())
-                continue;
-            const auto* ptr = std::get_if<PtrData>(&entry.record.data);
-            if (not ptr)
-                continue;
-
-            Message message;
-            message.response = true;
-            message.answers.push_back(entry.record);
-            for (const auto& additional : entries_) {
-                if (&additional != &entry and additional.record.type != Type::PTR)
-                    message.additionals.push_back(additional.record);
-            }
-            const auto service = resolve(message);
-            if (service and std::none_of(result.begin(), result.end(), [&](const Service& existing) {
-                    return equal(existing, *service);
-                }))
-                result.push_back(*service);
-        }
-        return result;
-    }
-
-    Now now_;
-    std::vector<Entry> entries_;
-    std::vector<Service> emitted_;
-};
-
-Cache::Cache(Now now)
-    : impl_(std::make_unique<Impl>(std::move(now)))
-{}
-
-Cache::~Cache() = default;
-Cache::Cache(Cache&&) noexcept = default;
-Cache& Cache::operator=(Cache&&) noexcept = default;
-
-std::vector<Service>
-Cache::update(const Message& message)
-{
-    return impl_->update(message);
-}
-
-std::vector<Service>
-Cache::services()
-{
-    return impl_->services();
-}
-
-void
-Cache::clear()
-{
-    impl_->clear();
-}
-
-Name
-serviceName()
-{
-    return Name::fromString(SERVICE_NAME);
-}
-
-Name
-instanceName(const InfoHash& nodeId)
-{
-    if (not nodeId)
-        throw ParseError("DNS-SD instance requires a node ID");
-    return Name::fromString(nodeId.toString() + std::string(SERVICE_SUFFIX));
-}
-
-Name
-hostName(const InfoHash& nodeId)
-{
-    if (not nodeId)
-        throw ParseError("mDNS host requires a node ID");
-    return Name::fromString(nodeId.toString() + std::string(HOST_SUFFIX));
-}
-
-Message
-announcement(const Service& service)
-{
-    return makeAdvertisement(service, SERVICE_RECORD_TTL, HOST_RECORD_TTL);
-}
-
-Message
-goodbye(const Service& service)
-{
-    return makeAdvertisement(service, 0, 0);
-}
-
-Message
-browseQuery()
-{
-    Message query;
-    query.questions.push_back({serviceName(), Type::PTR, CLASS_IN, false});
-    return query;
-}
-
-std::optional<Message>
-respond(const Message& query, const Service& service)
-{
-    if (query.response)
-        return {};
-
-    const auto advertisement = announcement(service);
-    Message response;
-    response.id = query.id;
-    response.response = true;
-    response.authoritative = true;
-
-    const ResourceRecord serviceType {
-        Name::fromString(SERVICE_ENUMERATION_NAME),
-        Type::PTR,
-        CLASS_IN,
-        false,
-        SERVICE_RECORD_TTL,
-        PtrData {serviceName()},
-    };
-
-    auto addMatching = [&](const ResourceRecord& record) {
-        const auto question = std::find_if(query.questions.begin(), query.questions.end(), [&](const Question& q) {
-            return matches(q, record);
-        });
-        if (question == query.questions.end() or (not question->unicastResponse and isKnownAnswer(query, record)))
-            return;
-        if (std::find_if(response.answers.begin(),
-                         response.answers.end(),
-                         [&](const ResourceRecord& answer) { return sameRecord(answer, record); })
-            == response.answers.end())
-            response.answers.push_back(record);
-    };
-
-    addMatching(serviceType);
-    for (const auto& record : advertisement.answers)
-        addMatching(record);
-    for (const auto& record : advertisement.additionals)
-        addMatching(record);
-    if (response.answers.empty())
-        return {};
-
-    const auto metaOnly = std::all_of(response.answers.begin(), response.answers.end(), [&](const auto& answer) {
-        return sameRecord(answer, serviceType);
-    });
-    if (metaOnly)
-        return response;
-
-    response.additionals = advertisement.additionals;
-    response.additionals.erase(std::remove_if(response.additionals.begin(),
-                                              response.additionals.end(),
-                                              [&](const ResourceRecord& record) {
-                                                  return std::any_of(response.answers.begin(),
-                                                                     response.answers.end(),
-                                                                     [&](const ResourceRecord& answer) {
-                                                                         return sameRecord(answer, record);
-                                                                     });
-                                              }),
-                               response.additionals.end());
-    return response;
-}
-
-std::optional<Service>
-resolve(const Message& message)
-{
-    std::vector<Name> instances;
-    forEachRecord(message, [&](const ResourceRecord& record) {
-        if (record.type == Type::PTR and record.classCode == CLASS_IN and record.name == serviceName()) {
-            if (const auto ptr = std::get_if<PtrData>(&record.data))
-                instances.push_back(ptr->name);
-        }
-    });
-    if (instances.size() != 1)
-        return {};
-
-    const auto nodeId = nodeIdFromInstance(instances.front());
-    if (not nodeId)
-        return {};
-    const auto expectedHost = hostName(*nodeId);
-    const SrvData* srv = nullptr;
-    const TxtData* txt = nullptr;
-    std::vector<AddressData> addresses;
-    auto duplicate = false;
-
-    forEachRecord(message, [&](const ResourceRecord& record) {
-        if (record.classCode != CLASS_IN)
-            return;
-        if (record.name == instances.front()) {
-            if (record.type == Type::SRV) {
-                if (srv)
-                    duplicate = true;
-                else
-                    srv = std::get_if<SrvData>(&record.data);
-            } else if (record.type == Type::TXT) {
-                if (txt)
-                    duplicate = true;
-                else
-                    txt = std::get_if<TxtData>(&record.data);
-            }
-        } else if (record.name == expectedHost) {
-            if (record.type == Type::A) {
-                if (const auto data = std::get_if<AData>(&record.data))
-                    addresses.emplace_back(*data);
-            } else if (record.type == Type::AAAA) {
-                if (const auto data = std::get_if<AaaaData>(&record.data))
-                    addresses.emplace_back(*data);
-            }
-        }
-    });
-
-    if (duplicate or not srv or not txt or srv->priority != 0 or srv->weight != 0 or srv->port == 0
-        or srv->target != expectedHost or addresses.empty())
-        return {};
-    const auto txtValues = parseTxt(*txt);
-    if (not txtValues or txtValues->nodeId != *nodeId)
-        return {};
-
-    Service service;
-    service.nodeId = *nodeId;
-    service.network = txtValues->network;
-    service.port = srv->port;
-    for (auto& address : addresses) {
-        if (std::find(service.addresses.begin(), service.addresses.end(), address) == service.addresses.end())
-            service.addresses.emplace_back(std::move(address));
-    }
-    return service;
-}
-
-} // namespace dht::mdns::dns_sd
@@ -1,61 +0,0 @@
-// Copyright (c) 2014-2026 Savoir-faire Linux Inc.
-// SPDX-License-Identifier: MIT
-#pragma once
-
-#include "mdns.h"
-
-#include "opendht/infohash.h"
-#include "opendht/utils.h"
-
-#include <chrono>
-#include <functional>
-#include <memory>
-#include <optional>
-
-namespace dht::mdns::dns_sd {
-
-constexpr uint32_t HOST_RECORD_TTL = 120;
-constexpr uint32_t SERVICE_RECORD_TTL = 4500;
-
-using AddressData = std::variant<AData, AaaaData>;
-
-struct Service
-{
-    InfoHash nodeId;
-    NetId network {};
-    in_port_t port {};
-    std::vector<AddressData> addresses;
-};
-
-class OPENDHT_PUBLIC Cache
-{
-public:
-    using Clock = std::chrono::steady_clock;
-    using Now = std::function<Clock::time_point()>;
-
-    explicit Cache(Now now = [] { return Clock::now(); });
-    ~Cache();
-
-    Cache(Cache&&) noexcept;
-    Cache& operator=(Cache&&) noexcept;
-
-    std::vector<Service> update(const Message& message);
-    std::vector<Service> services();
-    void clear();
-
-private:
-    class Impl;
-    std::unique_ptr<Impl> impl_;
-};
-
-OPENDHT_PUBLIC Name serviceName();
-OPENDHT_PUBLIC Name instanceName(const InfoHash& nodeId);
-OPENDHT_PUBLIC Name hostName(const InfoHash& nodeId);
-
-OPENDHT_PUBLIC Message announcement(const Service& service);
-OPENDHT_PUBLIC Message goodbye(const Service& service);
-OPENDHT_PUBLIC Message browseQuery();
-OPENDHT_PUBLIC std::optional<Message> respond(const Message& query, const Service& service);
-OPENDHT_PUBLIC std::optional<Service> resolve(const Message& message);
-
-} // namespace dht::mdns::dns_sd
@@ -1,563 +0,0 @@
-// Copyright (c) 2014-2026 Savoir-faire Linux Inc.
-// SPDX-License-Identifier: MIT
-
-#include "mdns.h"
-
-#include <algorithm>
-#include <cctype>
-#include <limits>
-#include <map>
-#include <unordered_map>
-
-namespace dht::mdns {
-namespace {
-
-constexpr uint16_t FLAG_RESPONSE = 0x8000;
-constexpr uint16_t FLAG_AUTHORITATIVE = 0x0400;
-constexpr uint16_t FLAG_TRUNCATED = 0x0200;
-constexpr uint16_t CLASS_TOP_BIT = 0x8000;
-constexpr uint16_t CLASS_MASK = 0x7fff;
-
-char
-asciiLower(char value)
-{
-    const auto byte = static_cast<unsigned char>(value);
-    return static_cast<char>(std::tolower(byte));
-}
-
-void
-validateLabels(const std::vector<std::string>& labels)
-{
-    size_t wireSize = 0;
-    for (const auto& label : labels) {
-        if (label.empty() or label.size() > 63)
-            throw ParseError("invalid DNS label length");
-        wireSize += label.size() + 1;
-        if (wireSize > 255)
-            throw ParseError("DNS name is too long");
-    }
-}
-
-std::string
-suffixKey(const std::vector<std::string>& labels, size_t first)
-{
-    std::string key;
-    for (auto index = first; index < labels.size(); ++index) {
-        key.push_back(static_cast<char>(labels[index].size()));
-        key.append(labels[index]);
-    }
-    key.push_back('\0');
-    return key;
-}
-
-class Writer
-{
-public:
-    void write8(uint8_t value)
-    {
-        ensure(1);
-        packet_.push_back(value);
-    }
-
-    void write16(uint16_t value)
-    {
-        ensure(2);
-        packet_.push_back(static_cast<uint8_t>(value >> 8));
-        packet_.push_back(static_cast<uint8_t>(value));
-    }
-
-    void write32(uint32_t value)
-    {
-        write16(static_cast<uint16_t>(value >> 16));
-        write16(static_cast<uint16_t>(value));
-    }
-
-    template<size_t Size>
-    void write(const std::array<uint8_t, Size>& bytes)
-    {
-        write(bytes.data(), bytes.size());
-    }
-
-    void write(const uint8_t* bytes, size_t size)
-    {
-        ensure(size);
-        packet_.insert(packet_.end(), bytes, bytes + size);
-    }
-
-    void writeName(const Name& name)
-    {
-        const auto& labels = name.labels();
-        for (size_t index = 0; index < labels.size(); ++index) {
-            const auto key = suffixKey(labels, index);
-            if (const auto found = suffixes_.find(key); found != suffixes_.end()) {
-                write16(static_cast<uint16_t>(0xc000 | found->second));
-                return;
-            }
-            if (packet_.size() < 0x4000)
-                suffixes_.emplace(key, static_cast<uint16_t>(packet_.size()));
-            write8(static_cast<uint8_t>(labels[index].size()));
-            write(reinterpret_cast<const uint8_t*>(labels[index].data()), labels[index].size());
-        }
-        write8(0);
-    }
-
-    size_t size() const noexcept { return packet_.size(); }
-
-    void patch16(size_t offset, uint16_t value)
-    {
-        if (offset + 2 > packet_.size())
-            throw ParseError("invalid DNS packet patch offset");
-        packet_[offset] = static_cast<uint8_t>(value >> 8);
-        packet_[offset + 1] = static_cast<uint8_t>(value);
-    }
-
-    Packet take() { return std::move(packet_); }
-
-private:
-    void ensure(size_t additional) const
-    {
-        if (additional > MAX_PACKET_SIZE - packet_.size())
-            throw ParseError("mDNS packet exceeds maximum size");
-    }
-
-    Packet packet_;
-    std::unordered_map<std::string, uint16_t> suffixes_;
-};
-
-class Reader
-{
-public:
-    Reader(const uint8_t* packet, size_t size)
-        : packet_(packet)
-        , size_(size)
-    {}
-
-    uint8_t read8()
-    {
-        require(1);
-        return packet_[position_++];
-    }
-
-    uint16_t read16()
-    {
-        const auto high = read8();
-        const auto low = read8();
-        return static_cast<uint16_t>((high << 8) | low);
-    }
-
-    uint32_t read32() { return (static_cast<uint32_t>(read16()) << 16) | read16(); }
-
-    Name readName()
-    {
-        std::vector<std::string> labels;
-        std::vector<size_t> visited;
-        auto cursor = position_;
-        auto jumped = false;
-        size_t wireSize = 0;
-
-        while (true) {
-            if (cursor >= size_)
-                throw ParseError("truncated DNS name");
-            if (std::find(visited.begin(), visited.end(), cursor) != visited.end())
-                throw ParseError("DNS compression pointer loop");
-            visited.push_back(cursor);
-
-            const auto length = packet_[cursor];
-            if ((length & 0xc0) == 0xc0) {
-                if (cursor + 1 >= size_)
-                    throw ParseError("truncated DNS compression pointer");
-                const auto pointer = static_cast<size_t>(((length & 0x3f) << 8) | packet_[cursor + 1]);
-                if (pointer >= cursor)
-                    throw ParseError("DNS compression pointer does not point backwards");
-                if (not jumped)
-                    position_ = cursor + 2;
-                cursor = pointer;
-                jumped = true;
-                continue;
-            }
-            if (length & 0xc0)
-                throw ParseError("invalid DNS label prefix");
-
-            ++cursor;
-            if (length == 0) {
-                if (not jumped)
-                    position_ = cursor;
-                break;
-            }
-            if (length > 63 or length > size_ - cursor)
-                throw ParseError("invalid or truncated DNS label");
-            wireSize += length + 1;
-            if (wireSize > 255)
-                throw ParseError("DNS name is too long");
-            labels.emplace_back(reinterpret_cast<const char*>(packet_ + cursor), length);
-            cursor += length;
-            if (not jumped)
-                position_ = cursor;
-        }
-        return Name {std::move(labels)};
-    }
-
-    std::vector<uint8_t> readBytes(size_t size)
-    {
-        require(size);
-        std::vector<uint8_t> bytes(packet_ + position_, packet_ + position_ + size);
-        position_ += size;
-        return bytes;
-    }
-
-    size_t position() const noexcept { return position_; }
-    void setPosition(size_t position)
-    {
-        if (position > size_)
-            throw ParseError("invalid DNS packet position");
-        position_ = position;
-    }
-
-private:
-    void require(size_t count) const
-    {
-        if (count > size_ - position_)
-            throw ParseError("truncated DNS packet");
-    }
-
-    const uint8_t* packet_;
-    size_t size_;
-    size_t position_ {};
-};
-
-uint16_t
-checkedCount(size_t count)
-{
-    if (count > std::numeric_limits<uint16_t>::max())
-        throw ParseError("too many DNS records");
-    return static_cast<uint16_t>(count);
-}
-
-void
-encodeQuestion(Writer& writer, const Question& question)
-{
-    writer.writeName(question.name);
-    writer.write16(static_cast<uint16_t>(question.type));
-    writer.write16(static_cast<uint16_t>(question.classCode | (question.unicastResponse ? CLASS_TOP_BIT : 0)));
-}
-
-void
-encodeNsec(Writer& writer, const NsecData& nsec)
-{
-    writer.writeName(nsec.nextDomain);
-    std::map<uint8_t, std::array<uint8_t, 32>> windows;
-    std::map<uint8_t, uint8_t> lengths;
-    for (const auto type : nsec.types) {
-        const auto value = static_cast<uint16_t>(type);
-        const auto window = static_cast<uint8_t>(value >> 8);
-        const auto low = static_cast<uint8_t>(value);
-        const auto byte = static_cast<uint8_t>(low / 8);
-        const auto bit = static_cast<uint8_t>(low % 8);
-        windows[window][byte] |= static_cast<uint8_t>(1u << (7 - bit));
-        lengths[window] = std::max<uint8_t>(lengths[window], byte + 1);
-    }
-    for (const auto& [window, bitmap] : windows) {
-        writer.write8(window);
-        writer.write8(lengths[window]);
-        writer.write(bitmap.data(), lengths[window]);
-    }
-}
-
-void
-encodeRecord(Writer& writer, const ResourceRecord& record)
-{
-    writer.writeName(record.name);
-    writer.write16(static_cast<uint16_t>(record.type));
-    writer.write16(static_cast<uint16_t>(record.classCode | (record.cacheFlush ? CLASS_TOP_BIT : 0)));
-    writer.write32(record.ttl);
-    const auto lengthOffset = writer.size();
-    writer.write16(0);
-    const auto dataOffset = writer.size();
-
-    switch (record.type) {
-    case Type::A:
-        writer.write(std::get<AData>(record.data).address);
-        break;
-    case Type::AAAA:
-        writer.write(std::get<AaaaData>(record.data).address);
-        break;
-    case Type::PTR:
-        writer.writeName(std::get<PtrData>(record.data).name);
-        break;
-    case Type::TXT:
-        for (const auto& string : std::get<TxtData>(record.data).strings) {
-            if (string.size() > 255)
-                throw ParseError("DNS TXT string is too long");
-            writer.write8(static_cast<uint8_t>(string.size()));
-            writer.write(string.data(), string.size());
-        }
-        break;
-    case Type::SRV: {
-        const auto& srv = std::get<SrvData>(record.data);
-        writer.write16(srv.priority);
-        writer.write16(srv.weight);
-        writer.write16(srv.port);
-        writer.writeName(srv.target);
-        break;
-    }
-    case Type::NSEC:
-        encodeNsec(writer, std::get<NsecData>(record.data));
-        break;
-    default: {
-        const auto& bytes = std::get<UnknownData>(record.data).bytes;
-        writer.write(bytes.data(), bytes.size());
-        break;
-    }
-    }
-
-    const auto dataSize = writer.size() - dataOffset;
-    if (dataSize > std::numeric_limits<uint16_t>::max())
-        throw ParseError("DNS record data is too large");
-    writer.patch16(lengthOffset, static_cast<uint16_t>(dataSize));
-}
-
-Question
-decodeQuestion(Reader& reader)
-{
-    Question question;
-    question.name = reader.readName();
-    question.type = static_cast<Type>(reader.read16());
-    const auto classField = reader.read16();
-    question.classCode = classField & CLASS_MASK;
-    question.unicastResponse = classField & CLASS_TOP_BIT;
-    return question;
-}
-
-NsecData
-decodeNsec(Reader& reader, size_t end)
-{
-    NsecData nsec;
-    nsec.nextDomain = reader.readName();
-    while (reader.position() < end) {
-        const auto window = reader.read8();
-        const auto length = reader.read8();
-        if (length == 0 or length > 32 or length > end - reader.position())
-            throw ParseError("invalid DNS NSEC bitmap");
-        const auto bitmap = reader.readBytes(length);
-        for (size_t byte = 0; byte < bitmap.size(); ++byte) {
-            for (uint8_t bit = 0; bit < 8; ++bit) {
-                if (bitmap[byte] & (1u << (7 - bit))) {
-                    const auto value = static_cast<uint16_t>((window << 8) | (byte * 8 + bit));
-                    nsec.types.push_back(static_cast<Type>(value));
-                }
-            }
-        }
-    }
-    return nsec;
-}
-
-ResourceRecord
-decodeRecord(Reader& reader)
-{
-    ResourceRecord record;
-    record.name = reader.readName();
-    record.type = static_cast<Type>(reader.read16());
-    const auto classField = reader.read16();
-    record.classCode = classField & CLASS_MASK;
-    record.cacheFlush = classField & CLASS_TOP_BIT;
-    record.ttl = reader.read32();
-    const auto dataLength = reader.read16();
-    const auto dataStart = reader.position();
-    const auto dataEnd = dataStart + dataLength;
-    if (dataEnd < dataStart)
-        throw ParseError("invalid DNS record length");
-
-    switch (record.type) {
-    case Type::A: {
-        if (dataLength != 4)
-            throw ParseError("invalid DNS A record length");
-        AData data;
-        const auto bytes = reader.readBytes(data.address.size());
-        std::copy(bytes.begin(), bytes.end(), data.address.begin());
-        record.data = data;
-        break;
-    }
-    case Type::AAAA: {
-        if (dataLength != 16)
-            throw ParseError("invalid DNS AAAA record length");
-        AaaaData data;
-        const auto bytes = reader.readBytes(data.address.size());
-        std::copy(bytes.begin(), bytes.end(), data.address.begin());
-        record.data = data;
-        break;
-    }
-    case Type::PTR:
-        record.data = PtrData {reader.readName()};
-        break;
-    case Type::TXT: {
-        TxtData data;
-        while (reader.position() < dataEnd) {
-            const auto length = reader.read8();
-            if (length > dataEnd - reader.position())
-                throw ParseError("truncated DNS TXT string");
-            data.strings.push_back(reader.readBytes(length));
-        }
-        record.data = std::move(data);
-        break;
-    }
-    case Type::SRV: {
-        if (dataLength < 7)
-            throw ParseError("invalid DNS SRV record length");
-        SrvData data;
-        data.priority = reader.read16();
-        data.weight = reader.read16();
-        data.port = reader.read16();
-        data.target = reader.readName();
-        record.data = std::move(data);
-        break;
-    }
-    case Type::NSEC:
-        record.data = decodeNsec(reader, dataEnd);
-        break;
-    default:
-        record.data = UnknownData {reader.readBytes(dataLength)};
-        break;
-    }
-
-    if (reader.position() != dataEnd)
-        throw ParseError("DNS record data length mismatch");
-    return record;
-}
-
-} // namespace
-
-Name::Name(std::vector<std::string> labels)
-    : labels_(std::move(labels))
-{
-    validateLabels(labels_);
-}
-
-Name
-Name::fromString(std::string_view name)
-{
-    if (name.empty() or name == ".")
-        return {};
-    if (name.back() == '.')
-        name.remove_suffix(1);
-
-    std::vector<std::string> labels;
-    size_t start = 0;
-    while (start <= name.size()) {
-        const auto end = name.find('.', start);
-        const auto length = (end == std::string_view::npos ? name.size() : end) - start;
-        if (length == 0)
-            throw ParseError("empty DNS label");
-        labels.emplace_back(name.substr(start, length));
-        if (end == std::string_view::npos)
-            break;
-        start = end + 1;
-    }
-    return Name {std::move(labels)};
-}
-
-std::string
-Name::toString() const
-{
-    if (labels_.empty())
-        return ".";
-    std::string name;
-    for (const auto& label : labels_) {
-        name.append(label);
-        name.push_back('.');
-    }
-    return name;
-}
-
-bool
-operator==(const Name& lhs, const Name& rhs) noexcept
-{
-    if (lhs.labels_.size() != rhs.labels_.size())
-        return false;
-    for (size_t index = 0; index < lhs.labels_.size(); ++index) {
-        const auto& left = lhs.labels_[index];
-        const auto& right = rhs.labels_[index];
-        if (left.size() != right.size())
-            return false;
-        if (not std::equal(left.begin(), left.end(), right.begin(), [](char a, char b) {
-                return asciiLower(a) == asciiLower(b);
-            }))
-            return false;
-    }
-    return true;
-}
-
-Packet
-encode(const Message& message)
-{
-    const auto recordCount = message.questions.size() + message.answers.size() + message.authorities.size()
-                             + message.additionals.size();
-    if (recordCount > MAX_RECORD_COUNT)
-        throw ParseError("too many DNS records");
-
-    Writer writer;
-    writer.write16(message.id);
-    uint16_t flags = 0;
-    if (message.response)
-        flags |= FLAG_RESPONSE;
-    if (message.authoritative)
-        flags |= FLAG_AUTHORITATIVE;
-    if (message.truncated)
-        flags |= FLAG_TRUNCATED;
-    writer.write16(flags);
-    writer.write16(checkedCount(message.questions.size()));
-    writer.write16(checkedCount(message.answers.size()));
-    writer.write16(checkedCount(message.authorities.size()));
-    writer.write16(checkedCount(message.additionals.size()));
-
-    for (const auto& question : message.questions)
-        encodeQuestion(writer, question);
-    for (const auto& record : message.answers)
-        encodeRecord(writer, record);
-    for (const auto& record : message.authorities)
-        encodeRecord(writer, record);
-    for (const auto& record : message.additionals)
-        encodeRecord(writer, record);
-    return writer.take();
-}
-
-Message
-decode(const uint8_t* packet, size_t size)
-{
-    if (packet == nullptr)
-        throw ParseError("null DNS packet");
-    if (size > MAX_PACKET_SIZE)
-        throw ParseError("mDNS packet exceeds maximum size");
-
-    Reader reader(packet, size);
-    Message message;
-    message.id = reader.read16();
-    const auto flags = reader.read16();
-    message.response = flags & FLAG_RESPONSE;
-    message.authoritative = flags & FLAG_AUTHORITATIVE;
-    message.truncated = flags & FLAG_TRUNCATED;
-    const auto questionCount = reader.read16();
-    const auto answerCount = reader.read16();
-    const auto authorityCount = reader.read16();
-    const auto additionalCount = reader.read16();
-    const auto recordCount = static_cast<size_t>(questionCount) + answerCount + authorityCount + additionalCount;
-    if (recordCount > MAX_RECORD_COUNT)
-        throw ParseError("too many DNS records");
-
-    message.questions.reserve(questionCount);
-    message.answers.reserve(answerCount);
-    message.authorities.reserve(authorityCount);
-    message.additionals.reserve(additionalCount);
-    for (size_t index = 0; index < questionCount; ++index)
-        message.questions.push_back(decodeQuestion(reader));
-    for (size_t index = 0; index < answerCount; ++index)
-        message.answers.push_back(decodeRecord(reader));
-    for (size_t index = 0; index < authorityCount; ++index)
-        message.authorities.push_back(decodeRecord(reader));
-    for (size_t index = 0; index < additionalCount; ++index)
-        message.additionals.push_back(decodeRecord(reader));
-    if (reader.position() != size)
-        throw ParseError("trailing bytes in DNS packet");
-    return message;
-}
-
-} // namespace dht::mdns
@@ -1,194 +0,0 @@
-// Copyright (c) 2014-2026 Savoir-faire Linux Inc.
-// SPDX-License-Identifier: MIT
-#pragma once
-
-#include "opendht/def.h"
-
-#include <array>
-#include <cstddef>
-#include <cstdint>
-#include <stdexcept>
-#include <string>
-#include <string_view>
-#include <variant>
-#include <vector>
-
-namespace dht::mdns {
-
-constexpr size_t MAX_PACKET_SIZE = 9000;
-constexpr size_t MAX_RECORD_COUNT = 1024;
-constexpr uint16_t CLASS_IN = 1;
-constexpr uint16_t CLASS_ANY = 255;
-
-enum class Type : uint16_t {
-    A = 1,
-    PTR = 12,
-    TXT = 16,
-    AAAA = 28,
-    SRV = 33,
-    NSEC = 47,
-    ANY = 255,
-};
-
-class OPENDHT_PUBLIC ParseError : public std::runtime_error
-{
-public:
-    using std::runtime_error::runtime_error;
-};
-
-class OPENDHT_PUBLIC Name
-{
-public:
-    Name() = default;
-    explicit Name(std::vector<std::string> labels);
-
-    static Name fromString(std::string_view name);
-
-    const std::vector<std::string>& labels() const noexcept { return labels_; }
-    std::string toString() const;
-
-    friend bool operator==(const Name& lhs, const Name& rhs) noexcept;
-    friend bool operator!=(const Name& lhs, const Name& rhs) noexcept { return not(lhs == rhs); }
-
-private:
-    std::vector<std::string> labels_;
-};
-
-OPENDHT_PUBLIC bool operator==(const Name& lhs, const Name& rhs) noexcept;
-
-struct Question
-{
-    Name name;
-    Type type {Type::ANY};
-    uint16_t classCode {CLASS_IN};
-    bool unicastResponse {false};
-};
-
-struct AData
-{
-    std::array<uint8_t, 4> address {};
-};
-
-struct AaaaData
-{
-    std::array<uint8_t, 16> address {};
-};
-
-struct PtrData
-{
-    Name name;
-};
-
-struct TxtData
-{
-    std::vector<std::vector<uint8_t>> strings;
-};
-
-struct SrvData
-{
-    uint16_t priority {};
-    uint16_t weight {};
-    uint16_t port {};
-    Name target;
-};
-
-struct NsecData
-{
-    Name nextDomain;
-    std::vector<Type> types;
-};
-
-struct UnknownData
-{
-    std::vector<uint8_t> bytes;
-};
-
-using RData = std::variant<AData, AaaaData, PtrData, TxtData, SrvData, NsecData, UnknownData>;
-
-struct ResourceRecord
-{
-    Name name;
-    Type type {Type::ANY};
-    uint16_t classCode {CLASS_IN};
-    bool cacheFlush {false};
-    uint32_t ttl {};
-    RData data {UnknownData {}};
-};
-
-struct Message
-{
-    uint16_t id {};
-    bool response {false};
-    bool authoritative {false};
-    bool truncated {false};
-    std::vector<Question> questions;
-    std::vector<ResourceRecord> answers;
-    std::vector<ResourceRecord> authorities;
-    std::vector<ResourceRecord> additionals;
-};
-
-using Packet = std::vector<uint8_t>;
-
-OPENDHT_PUBLIC Packet encode(const Message& message);
-OPENDHT_PUBLIC Message decode(const uint8_t* packet, size_t size);
-
-inline bool
-operator==(const Question& lhs, const Question& rhs)
-{
-    return lhs.name == rhs.name and lhs.type == rhs.type and lhs.classCode == rhs.classCode
-           and lhs.unicastResponse == rhs.unicastResponse;
-}
-
-inline bool
-operator==(const AData& lhs, const AData& rhs)
-{
-    return lhs.address == rhs.address;
-}
-inline bool
-operator==(const AaaaData& lhs, const AaaaData& rhs)
-{
-    return lhs.address == rhs.address;
-}
-inline bool
-operator==(const PtrData& lhs, const PtrData& rhs)
-{
-    return lhs.name == rhs.name;
-}
-inline bool
-operator==(const TxtData& lhs, const TxtData& rhs)
-{
-    return lhs.strings == rhs.strings;
-}
-inline bool
-operator==(const SrvData& lhs, const SrvData& rhs)
-{
-    return lhs.priority == rhs.priority and lhs.weight == rhs.weight and lhs.port == rhs.port
-           and lhs.target == rhs.target;
-}
-inline bool
-operator==(const NsecData& lhs, const NsecData& rhs)
-{
-    return lhs.nextDomain == rhs.nextDomain and lhs.types == rhs.types;
-}
-inline bool
-operator==(const UnknownData& lhs, const UnknownData& rhs)
-{
-    return lhs.bytes == rhs.bytes;
-}
-
-inline bool
-operator==(const ResourceRecord& lhs, const ResourceRecord& rhs)
-{
-    return lhs.name == rhs.name and lhs.type == rhs.type and lhs.classCode == rhs.classCode
-           and lhs.cacheFlush == rhs.cacheFlush and lhs.ttl == rhs.ttl and lhs.data == rhs.data;
-}
-
-inline bool
-operator==(const Message& lhs, const Message& rhs)
-{
-    return lhs.id == rhs.id and lhs.response == rhs.response and lhs.authoritative == rhs.authoritative
-           and lhs.truncated == rhs.truncated and lhs.questions == rhs.questions and lhs.answers == rhs.answers
-           and lhs.authorities == rhs.authorities and lhs.additionals == rhs.additionals;
-}
-
-} // namespace dht::mdns
@@ -1,455 +0,0 @@
-// Copyright (c) 2014-2026 Savoir-faire Linux Inc.
-// SPDX-License-Identifier: MIT
-
-#include "mdns_transport.h"
-
-#include <asio.hpp>
-#include <algorithm>
-#include <array>
-#include <cerrno>
-#include <cstring>
-#include <future>
-#include <mutex>
-
-#ifdef _WIN32
-#include <iphlpapi.h>
-#else
-#include <ifaddrs.h>
-#include <net/if.h>
-#endif
-
-namespace dht::mdns {
-namespace {
-
-constexpr in_port_t MDNS_PORT = 5353;
-constexpr std::string_view MDNS_IPV4 = "224.0.0.251";
-constexpr std::string_view MDNS_IPV6 = "ff02::fb";
-
-std::vector<InterfaceAddress>
-interfaceAddresses([[maybe_unused]] asio::io_context& ioContext)
-{
-    std::vector<InterfaceAddress> result;
-#ifdef _WIN32
-    ULONG size = 15000;
-    std::vector<uint8_t> buffer(size);
-    auto* adapters = reinterpret_cast<IP_ADAPTER_ADDRESSES*>(buffer.data());
-    auto status = GetAdaptersAddresses(AF_UNSPEC,
-                                       GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER,
-                                       nullptr,
-                                       adapters,
-                                       &size);
-    if (status == ERROR_BUFFER_OVERFLOW) {
-        buffer.resize(size);
-        adapters = reinterpret_cast<IP_ADAPTER_ADDRESSES*>(buffer.data());
-        status = GetAdaptersAddresses(AF_UNSPEC,
-                                      GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER,
-                                      nullptr,
-                                      adapters,
-                                      &size);
-    }
-    if (status == NO_ERROR) {
-        InterfaceId id = 0;
-        for (auto* adapter = adapters; adapter; adapter = adapter->Next) {
-            if (adapter->OperStatus != IfOperStatusUp)
-                continue;
-            ++id;
-            const auto multicast = not(adapter->Flags & IP_ADAPTER_NO_MULTICAST);
-            const auto loopback = adapter->IfType == IF_TYPE_SOFTWARE_LOOPBACK;
-            for (auto* current = adapter->FirstUnicastAddress; current; current = current->Next) {
-                const auto* socketAddress = current->Address.lpSockaddr;
-                if (socketAddress->sa_family == AF_INET) {
-                    const auto* address = reinterpret_cast<const sockaddr_in*>(socketAddress);
-                    asio::ip::address_v4::bytes_type bytes;
-                    std::memcpy(bytes.data(), &address->sin_addr, bytes.size());
-                    result.push_back({id, adapter->IfIndex, asio::ip::address_v4(bytes), multicast, loopback});
-                } else if (socketAddress->sa_family == AF_INET6) {
-                    const auto* address = reinterpret_cast<const sockaddr_in6*>(socketAddress);
-                    asio::ip::address_v6::bytes_type bytes;
-                    std::memcpy(bytes.data(), &address->sin6_addr, bytes.size());
-                    result.push_back({id,
-                                      adapter->Ipv6IfIndex,
-                                      asio::ip::address_v6(bytes, address->sin6_scope_id),
-                                      multicast,
-                                      loopback});
-                }
-            }
-        }
-    }
-#else
-    ifaddrs* addresses = nullptr;
-    if (getifaddrs(&addresses) != 0)
-        return result;
-    for (auto* current = addresses; current; current = current->ifa_next) {
-        if (not current->ifa_addr or not(current->ifa_flags & IFF_UP))
-            continue;
-        const auto family = current->ifa_addr->sa_family;
-        if (family == AF_INET) {
-            const auto* address = reinterpret_cast<const sockaddr_in*>(current->ifa_addr);
-            asio::ip::address_v4::bytes_type bytes;
-            std::memcpy(bytes.data(), &address->sin_addr, bytes.size());
-            const auto index = if_nametoindex(current->ifa_name);
-            result.push_back({index,
-                              index,
-                              asio::ip::address_v4(bytes),
-                              bool(current->ifa_flags & IFF_MULTICAST),
-                              bool(current->ifa_flags & IFF_LOOPBACK)});
-        } else if (family == AF_INET6) {
-            const auto* address = reinterpret_cast<const sockaddr_in6*>(current->ifa_addr);
-            asio::ip::address_v6::bytes_type bytes;
-            std::memcpy(bytes.data(), &address->sin6_addr, bytes.size());
-            const auto index = if_nametoindex(current->ifa_name);
-            result.push_back({index,
-                              index,
-                              asio::ip::address_v6(bytes, address->sin6_scope_id),
-                              bool(current->ifa_flags & IFF_MULTICAST),
-                              bool(current->ifa_flags & IFF_LOOPBACK)});
-        }
-    }
-    freeifaddrs(addresses);
-#endif
-    return result;
-}
-
-} // namespace
-
-std::vector<NetworkInterface>
-groupInterfaces(const std::vector<InterfaceAddress>& addresses)
-{
-    std::vector<NetworkInterface> result;
-    const auto hasNonLoopback = std::any_of(addresses.begin(), addresses.end(), [](const InterfaceAddress& address) {
-        return address.multicast and not address.loopback and not address.address.is_unspecified()
-               and not address.address.is_multicast();
-    });
-
-    for (const auto& address : addresses) {
-        if (address.id == 0 or not address.multicast or (hasNonLoopback and address.loopback)
-            or address.address.is_unspecified() or address.address.is_multicast())
-            continue;
-
-        auto scope = std::find_if(result.begin(), result.end(), [&](const NetworkInterface& interface) {
-            return interface.id == address.id;
-        });
-        if (scope == result.end()) {
-            NetworkInterface interface;
-            interface.id = address.id;
-            result.push_back(std::move(interface));
-            scope = std::prev(result.end());
-        }
-
-        dns_sd::AddressData record;
-        if (address.address.is_v4()) {
-            scope->ipv4Index = address.index;
-            if (not scope->ipv4Outbound)
-                scope->ipv4Outbound = address.address.to_v4();
-            record = AData {address.address.to_v4().to_bytes()};
-        } else {
-            const auto bytes = address.address.to_v6().to_bytes();
-            const auto mapped = std::all_of(bytes.begin(), bytes.begin() + 10, [](uint8_t byte) { return byte == 0; })
-                                and bytes[10] == 0xff and bytes[11] == 0xff;
-            if (mapped)
-                continue;
-            scope->ipv6Index = address.index;
-            record = AaaaData {bytes};
-        }
-        if (std::find(scope->addresses.begin(), scope->addresses.end(), record) == scope->addresses.end())
-            scope->addresses.emplace_back(std::move(record));
-    }
-    result.erase(std::remove_if(result.begin(),
-                                result.end(),
-                                [](const NetworkInterface& interface) { return interface.addresses.empty(); }),
-                 result.end());
-    return result;
-}
-
-class MdnsTransport::Impl : public std::enable_shared_from_this<MdnsTransport::Impl>
-{
-public:
-    Impl(std::shared_ptr<asio::io_context> ioContext, std::shared_ptr<Logger> logger)
-        : ioContext_(std::move(ioContext))
-        , logger_(std::move(logger))
-        , interfaces_(groupInterfaces(interfaceAddresses(*ioContext_)))
-    {}
-
-    struct Socket
-    {
-        explicit Socket(asio::io_context& ioContext)
-            : socket(ioContext)
-        {}
-
-        asio::ip::udp::socket socket;
-        std::array<uint8_t, MAX_PACKET_SIZE> receiveBuffer {};
-        asio::ip::udp::endpoint sender;
-        asio::ip::udp::endpoint multicast;
-        InterfaceId interface {};
-        unsigned ipv6Index {};
-    };
-
-    void start(ReceiveCallback callback)
-    {
-        callback_ = std::move(callback);
-        configure();
-    }
-
-    void send(Packet packet) { send(std::move(packet), {}, {}); }
-
-    void send(Packet packet, std::optional<asio::ip::udp::endpoint> destination, std::optional<InterfaceId> interface)
-    {
-        auto sharedPacket = std::make_shared<Packet>(std::move(packet));
-        asio::post(*ioContext_, [weak = weak_from_this(), sharedPacket, destination, interface] {
-            const auto self = weak.lock();
-            if (not self)
-                return;
-            for (const auto& state : self->sockets_) {
-                if (interface and state->interface != *interface)
-                    continue;
-                const auto target = destination.value_or(state->multicast);
-                if (target.address().is_v4() != state->multicast.address().is_v4())
-                    continue;
-                state->socket.async_send_to(asio::buffer(*sharedPacket),
-                                            target,
-                                            [logger = self->logger_, sharedPacket](const asio::error_code& error,
-                                                                                   size_t) {
-                                                if (error and error != asio::error::operation_aborted and logger)
-                                                    logger->warn("Unable to send mDNS packet: {}", error.message());
-                                            });
-            }
-        });
-    }
-
-    void sendAndWait(Packet packet, InterfaceId interface)
-    {
-        if (ioContext_->get_executor().running_in_this_thread()) {
-            sendNow(packet, interface);
-            return;
-        }
-        auto completed = std::make_shared<std::promise<void>>();
-        auto future = completed->get_future();
-        asio::post(*ioContext_, [weak = weak_from_this(), packet = std::move(packet), interface, completed] {
-            if (const auto self = weak.lock())
-                self->sendNow(packet, interface);
-            completed->set_value();
-        });
-        future.wait_for(std::chrono::milliseconds(250));
-    }
-
-    void refresh()
-    {
-        {
-            std::lock_guard lock(interfacesMutex_);
-            interfaces_ = groupInterfaces(interfaceAddresses(*ioContext_));
-        }
-        asio::post(*ioContext_, [weak = weak_from_this()] {
-            if (const auto self = weak.lock())
-                self->configure();
-        });
-    }
-
-    void stop()
-    {
-        if (ioContext_->get_executor().running_in_this_thread()) {
-            stopNow();
-            return;
-        }
-        auto completed = std::make_shared<std::promise<void>>();
-        auto future = completed->get_future();
-        asio::post(*ioContext_, [weak = weak_from_this(), completed] {
-            if (const auto self = weak.lock())
-                self->stopNow();
-            completed->set_value();
-        });
-        future.wait_for(std::chrono::milliseconds(250));
-    }
-
-    std::vector<NetworkInterface> interfaces() const
-    {
-        std::lock_guard lock(interfacesMutex_);
-        return interfaces_;
-    }
-
-private:
-    void sendNow(const Packet& packet, InterfaceId interface)
-    {
-        for (const auto& state : sockets_) {
-            if (state->interface != interface)
-                continue;
-            asio::error_code error;
-            state->socket.send_to(asio::buffer(packet), state->multicast, 0, error);
-            if (error and logger_)
-                logger_->warn("Unable to send final mDNS packet: {}", error.message());
-        }
-    }
-
-    void stopNow()
-    {
-        callback_ = {};
-        stopSockets();
-    }
-
-    void configure()
-    {
-        stopSockets();
-        std::vector<NetworkInterface> currentInterfaces;
-        {
-            std::lock_guard lock(interfacesMutex_);
-            currentInterfaces = interfaces_;
-        }
-        for (const auto& interface : currentInterfaces) {
-            if (interface.ipv4Outbound)
-                configure(interface, asio::ip::udp::v4(), asio::ip::make_address(MDNS_IPV4));
-            if (interface.ipv6Index)
-                configure(interface, asio::ip::udp::v6(), asio::ip::make_address(MDNS_IPV6));
-        }
-    }
-
-    void configure(const NetworkInterface& interface, asio::ip::udp protocol, const asio::ip::address& multicast)
-    {
-        auto state = std::make_shared<Socket>(*ioContext_);
-        asio::error_code error;
-        state->socket.open(protocol, error);
-        if (error)
-            return logSocketError(protocol, error);
-        state->socket.set_option(asio::ip::udp::socket::reuse_address(true), error);
-#if defined(SO_REUSEPORT) && !defined(_WIN32)
-        if (not error) {
-            const int enabled = 1;
-            if (::setsockopt(state->socket.native_handle(), SOL_SOCKET, SO_REUSEPORT, &enabled, sizeof(enabled)) != 0)
-                error.assign(errno, asio::error::get_system_category());
-        }
-#endif
-        if (error)
-            return logSocketError(protocol, error);
-        if (protocol == asio::ip::udp::v6())
-            state->socket.set_option(asio::ip::v6_only(true), error);
-        state->socket.bind({protocol, MDNS_PORT}, error);
-        if (error)
-            return logSocketError(protocol, error);
-        state->socket.set_option(asio::ip::multicast::hops(255), error);
-        if (error)
-            return logSocketError(protocol, error);
-        state->socket.set_option(asio::ip::multicast::enable_loopback(true), error);
-        if (protocol == asio::ip::udp::v4()) {
-            state->socket.set_option(asio::ip::multicast::join_group(multicast.to_v4(), *interface.ipv4Outbound), error);
-            if (not error)
-                state->socket.set_option(asio::ip::multicast::outbound_interface(*interface.ipv4Outbound), error);
-        } else {
-            state->socket.set_option(asio::ip::multicast::join_group(multicast.to_v6(), interface.ipv6Index), error);
-            if (not error)
-                state->socket.set_option(asio::ip::multicast::outbound_interface(interface.ipv6Index), error);
-        }
-        if (error)
-            return logSocketError(protocol, error);
-
-        if (protocol == asio::ip::udp::v6())
-            state->multicast = {asio::ip::address_v6(multicast.to_v6().to_bytes(), interface.ipv6Index), MDNS_PORT};
-        else
-            state->multicast = {multicast, MDNS_PORT};
-        state->interface = interface.id;
-        state->ipv6Index = interface.ipv6Index;
-        sockets_.push_back(state);
-        receive(state);
-    }
-
-    void receive(const std::shared_ptr<Socket>& state)
-    {
-        state->socket.async_receive_from(asio::buffer(state->receiveBuffer),
-                                         state->sender,
-                                         [weak = weak_from_this(), state](const asio::error_code& error, size_t size) {
-                                             const auto self = weak.lock();
-                                             if (not self)
-                                                 return;
-                                             if (not error and self->callback_) {
-                                                 Packet packet(state->receiveBuffer.begin(),
-                                                               state->receiveBuffer.begin() + size);
-                                                 self->callback_(packet,
-                                                                 {state->sender, state->interface, state->ipv6Index});
-                                             } else if (error != asio::error::operation_aborted and self->logger_) {
-                                                 self->logger_->warn("Unable to receive mDNS packet: {}",
-                                                                     error.message());
-                                             }
-                                             if (state->socket.is_open())
-                                                 self->receive(state);
-                                         });
-    }
-
-    void stopSockets()
-    {
-        for (const auto& state : sockets_) {
-            asio::error_code error;
-            state->socket.cancel(error);
-            state->socket.close(error);
-        }
-        sockets_.clear();
-    }
-
-    void logSocketError(asio::ip::udp protocol, const asio::error_code& error)
-    {
-        if (logger_)
-            logger_->warn("Unable to start {} mDNS transport: {}",
-                          protocol == asio::ip::udp::v4() ? "IPv4" : "IPv6",
-                          error.message());
-    }
-
-    std::shared_ptr<asio::io_context> ioContext_;
-    std::shared_ptr<Logger> logger_;
-    mutable std::mutex interfacesMutex_;
-    std::vector<NetworkInterface> interfaces_;
-    std::vector<std::shared_ptr<Socket>> sockets_;
-    ReceiveCallback callback_;
-};
-
-MdnsTransport::MdnsTransport(std::shared_ptr<asio::io_context> ioContext, std::shared_ptr<Logger> logger)
-    : impl_(std::make_shared<Impl>(std::move(ioContext), std::move(logger)))
-{}
-
-MdnsTransport::~MdnsTransport() = default;
-
-void
-MdnsTransport::start(ReceiveCallback callback)
-{
-    impl_->start(std::move(callback));
-}
-
-void
-MdnsTransport::send(Packet packet)
-{
-    impl_->send(std::move(packet));
-}
-
-void
-MdnsTransport::send(Packet packet, InterfaceId interface)
-{
-    impl_->send(std::move(packet), {}, interface);
-}
-
-void
-MdnsTransport::send(Packet packet, const asio::ip::udp::endpoint& destination, InterfaceId interface)
-{
-    impl_->send(std::move(packet), destination, interface);
-}
-
-void
-MdnsTransport::sendAndWait(Packet packet, InterfaceId interface)
-{
-    impl_->sendAndWait(std::move(packet), interface);
-}
-
-void
-MdnsTransport::refresh()
-{
-    impl_->refresh();
-}
-
-void
-MdnsTransport::stop()
-{
-    if (impl_)
-        impl_->stop();
-}
-
-std::vector<NetworkInterface>
-MdnsTransport::interfaces() const
-{
-    return impl_->interfaces();
-}
-
-} // namespace dht::mdns
@@ -1,74 +0,0 @@
-// Copyright (c) 2014-2026 Savoir-faire Linux Inc.
-// SPDX-License-Identifier: MIT
-#pragma once
-
-#include "dns_sd.h"
-
-#include "opendht/logger.h"
-
-#include <asio/ip/address.hpp>
-#include <asio/ip/udp.hpp>
-#include <cstdint>
-#include <functional>
-#include <memory>
-#include <optional>
-
-namespace asio {
-class io_context;
-}
-
-namespace dht::mdns {
-
-using InterfaceId = uint64_t;
-
-struct InterfaceAddress
-{
-    InterfaceId id {};
-    unsigned index {};
-    asio::ip::address address;
-    bool multicast {true};
-    bool loopback {false};
-};
-
-struct NetworkInterface
-{
-    InterfaceId id {};
-    unsigned ipv4Index {};
-    unsigned ipv6Index {};
-    std::optional<asio::ip::address_v4> ipv4Outbound;
-    std::vector<dns_sd::AddressData> addresses;
-};
-
-OPENDHT_PUBLIC std::vector<NetworkInterface> groupInterfaces(const std::vector<InterfaceAddress>& addresses);
-
-struct ReceiveContext
-{
-    asio::ip::udp::endpoint source;
-    InterfaceId interface {};
-    unsigned ipv6Index {};
-};
-
-class MdnsTransport
-{
-public:
-    using ReceiveCallback = std::function<void(const Packet&, const ReceiveContext&)>;
-
-    MdnsTransport(std::shared_ptr<asio::io_context> ioContext, std::shared_ptr<Logger> logger = {});
-    ~MdnsTransport();
-
-    void start(ReceiveCallback callback);
-    void send(Packet packet);
-    void send(Packet packet, InterfaceId interface);
-    void send(Packet packet, const asio::ip::udp::endpoint& destination, InterfaceId interface);
-    void sendAndWait(Packet packet, InterfaceId interface);
-    void refresh();
-    void stop();
-
-    std::vector<NetworkInterface> interfaces() const;
-
-private:
-    class Impl;
-    std::shared_ptr<Impl> impl_;
-};
-
-} // namespace dht::mdns
@@ -1,438 +0,0 @@
-// Copyright (c) 2014-2026 Savoir-faire Linux Inc.
-// SPDX-License-Identifier: MIT
-
-#include "peer_discovery.h"
-
-#include "dns_sd.h"
-#include "mdns_transport.h"
-
-#include <asio.hpp>
-#include <chrono>
-#include <cstring>
-#include <map>
-#include <mutex>
-#include <optional>
-#include <random>
-
-namespace dht {
-namespace {
-
-constexpr auto BROWSE_INTERVAL = std::chrono::seconds(60);
-constexpr auto CONNECTIVITY_RETRY = std::chrono::seconds(10);
-constexpr auto CONNECTIVITY_RETRY_MAX = std::chrono::minutes(1);
-
-SockAddr
-socketAddress(const mdns::dns_sd::AddressData& data, in_port_t port, const mdns::ReceiveContext& context)
-{
-    SockAddr address;
-    std::visit(
-        [&](const auto& record) {
-            using Record = std::decay_t<decltype(record)>;
-            if constexpr (std::is_same_v<Record, mdns::AData>) {
-                address.setFamily(AF_INET);
-                std::memcpy(&address.getIPv4().sin_addr, record.address.data(), record.address.size());
-            } else {
-                address.setFamily(AF_INET6);
-                std::memcpy(&address.getIPv6().sin6_addr, record.address.data(), record.address.size());
-                const asio::ip::address_v6 parsed(record.address);
-                if (parsed.is_link_local())
-                    address.getIPv6().sin6_scope_id = context.ipv6Index;
-            }
-        },
-        data);
-    address.setPort(port);
-    return address;
-}
-
-} // namespace
-
-class PeerDiscovery::Impl : public std::enable_shared_from_this<PeerDiscovery::Impl>
-{
-public:
-    Impl(std::shared_ptr<asio::io_context> ioContext, std::shared_ptr<Logger> logger)
-        : ioContext_(std::move(ioContext))
-        , logger_(std::move(logger))
-        , transport_(ioContext_, logger_)
-        , browseTimer_(*ioContext_)
-        , announceTimer_(*ioContext_)
-        , connectivityTimer_(*ioContext_)
-    {}
-
-    void start()
-    {
-        transport_.start([weak = weak_from_this()](const mdns::Packet& packet, const mdns::ReceiveContext& context) {
-            if (const auto self = weak.lock())
-                self->receive(packet, context);
-        });
-        if (logger_)
-            logger_->debug("[peer discovery {:p}] Started.", fmt::ptr(this));
-    }
-
-    void startDiscovery(NetId network, PeerDiscoveredCallback callback)
-    {
-        {
-            std::lock_guard lock(mutex_);
-            discoveryNetwork_ = network;
-            discoveryCallback_ = std::move(callback);
-        }
-        asio::post(*ioContext_, [weak = weak_from_this()] {
-            if (const auto self = weak.lock())
-                self->browse();
-        });
-    }
-
-    void startPublish(const InfoHash& nodeId, NetId network, in_port_t port)
-    {
-        mdns::dns_sd::Service service {nodeId, network, port, {}};
-        if (transport_.interfaces().empty())
-            throw mdns::ParseError("DNS-SD service requires a multicast interface");
-        {
-            std::lock_guard lock(mutex_);
-            published_ = std::move(service);
-        }
-        announce();
-        asio::post(*ioContext_, [weak = weak_from_this()] {
-            const auto self = weak.lock();
-            if (not self)
-                return;
-            self->announceTimer_.expires_after(std::chrono::seconds(1));
-            self->announceTimer_.async_wait([weak](const asio::error_code& error) {
-                if (not error) {
-                    if (const auto locked = weak.lock())
-                        locked->announce();
-                }
-            });
-        });
-    }
-
-    bool stopDiscovery()
-    {
-        std::lock_guard lock(mutex_);
-        const auto stopped = bool(discoveryCallback_);
-        discoveryCallback_ = {};
-        discoveryNetwork_.reset();
-        asio::post(*ioContext_, [weak = weak_from_this()] {
-            if (const auto self = weak.lock())
-                self->browseTimer_.cancel();
-        });
-        return stopped;
-    }
-
-    bool stopPublish()
-    {
-        std::optional<mdns::dns_sd::Service> service;
-        {
-            std::lock_guard lock(mutex_);
-            service = std::exchange(published_, {});
-        }
-        asio::post(*ioContext_, [weak = weak_from_this()] {
-            if (const auto self = weak.lock())
-                self->announceTimer_.cancel();
-        });
-        if (service)
-            advertise(*service, true, false);
-        return bool(service);
-    }
-
-    void stop()
-    {
-        stopConnectivityChanged();
-        stopDiscovery();
-        std::optional<mdns::dns_sd::Service> service;
-        {
-            std::lock_guard lock(mutex_);
-            service = std::exchange(published_, {});
-        }
-        asio::post(*ioContext_, [weak = weak_from_this()] {
-            if (const auto self = weak.lock())
-                self->announceTimer_.cancel();
-        });
-        if (service)
-            advertise(*service, true, true);
-        transport_.stop();
-    }
-
-    void connectivityChanged()
-    {
-        asio::post(*ioContext_, [weak = weak_from_this()] {
-            if (const auto self = weak.lock())
-                self->handleConnectivityChanged();
-        });
-    }
-
-    void stopConnectivityChanged()
-    {
-        asio::post(*ioContext_, [weak = weak_from_this()] {
-            if (const auto self = weak.lock()) {
-                self->connectivityTimer_.cancel();
-                self->connectivityRetry_ = CONNECTIVITY_RETRY;
-            }
-        });
-    }
-
-private:
-    void handleConnectivityChanged()
-    {
-        caches_.clear();
-        transport_.refresh();
-        refreshPublication();
-        browse();
-
-        connectivityTimer_.expires_after(connectivityRetry_);
-        connectivityTimer_.async_wait([weak = weak_from_this()](const asio::error_code& error) {
-            if (not error) {
-                if (const auto self = weak.lock())
-                    self->handleConnectivityChanged();
-            }
-        });
-        connectivityRetry_ = std::min(connectivityRetry_ * 2,
-                                      std::chrono::duration_cast<std::chrono::steady_clock::duration>(
-                                          CONNECTIVITY_RETRY_MAX));
-    }
-
-    void browse()
-    {
-        bool active;
-        {
-            std::lock_guard lock(mutex_);
-            active = bool(discoveryCallback_);
-        }
-        if (not active)
-            return;
-        if (logger_)
-            logger_->debug("[peer discovery {:p}] Browsing.", fmt::ptr(this));
-        transport_.send(mdns::encode(mdns::dns_sd::browseQuery()));
-        browseTimer_.expires_after(BROWSE_INTERVAL);
-        browseTimer_.async_wait([weak = weak_from_this()](const asio::error_code& error) {
-            if (not error) {
-                if (const auto self = weak.lock())
-                    self->browse();
-            }
-        });
-    }
-
-    void announce()
-    {
-        std::optional<mdns::dns_sd::Service> service;
-        {
-            std::lock_guard lock(mutex_);
-            service = published_;
-        }
-        if (logger_)
-            logger_->debug("[peer discovery {:p}] Announcing.", fmt::ptr(this));
-        if (service)
-            advertise(*service, false, false);
-    }
-
-    void refreshPublication()
-    {
-        std::optional<mdns::dns_sd::Service> service;
-        {
-            std::lock_guard lock(mutex_);
-            if (published_)
-                service = published_;
-        }
-        if (service)
-            advertise(*service, false, false);
-    }
-
-    void advertise(const mdns::dns_sd::Service& service, bool goodbye, bool wait)
-    {
-        for (const auto& interface : transport_.interfaces()) {
-            auto scoped = service;
-            scoped.addresses = interface.addresses;
-            auto packet = mdns::encode(goodbye ? mdns::dns_sd::goodbye(scoped) : mdns::dns_sd::announcement(scoped));
-            if (wait)
-                transport_.sendAndWait(std::move(packet), interface.id);
-            else
-                transport_.send(std::move(packet), interface.id);
-        }
-    }
-
-    void receive(const mdns::Packet& packet, const mdns::ReceiveContext& context)
-    {
-        if (logger_)
-            logger_->debug("[peer discovery {:p}] Got packet of size {}.", fmt::ptr(this), packet.size());
-        try {
-            const auto message = mdns::decode(packet.data(), packet.size());
-            if (message.response)
-                discover(message, context);
-            else
-                answer(message, context);
-        } catch (const std::exception& error) {
-            if (logger_)
-                logger_->warn("Ignoring invalid mDNS packet: {}", error.what());
-        }
-    }
-
-    void answer(const mdns::Message& query, const mdns::ReceiveContext& context)
-    {
-        std::optional<mdns::dns_sd::Service> service;
-        {
-            std::lock_guard lock(mutex_);
-            service = published_;
-        }
-        if (service) {
-            const auto interfaces = transport_.interfaces();
-            const auto interface = std::find_if(interfaces.begin(), interfaces.end(), [&](const auto& candidate) {
-                return candidate.id == context.interface;
-            });
-            if (interface == interfaces.end())
-                return;
-            service->addresses = interface->addresses;
-            if (auto response = mdns::dns_sd::respond(query, *service)) {
-                const auto unicast = context.source.port() != 5353
-                                     or std::any_of(query.questions.begin(),
-                                                    query.questions.end(),
-                                                    [](const mdns::Question& question) {
-                                                        return question.unicastResponse;
-                                                    });
-                if (context.source.port() != 5353)
-                    response->questions = query.questions;
-                auto packet = mdns::encode(*response);
-                const auto sharedAnswer = std::any_of(response->answers.begin(),
-                                                      response->answers.end(),
-                                                      [](const mdns::ResourceRecord& record) {
-                                                          return not record.cacheFlush;
-                                                      });
-                if (not sharedAnswer) {
-                    if (unicast)
-                        transport_.send(std::move(packet), context.source, context.interface);
-                    else
-                        transport_.send(std::move(packet), context.interface);
-                    return;
-                }
-
-                static thread_local std::mt19937 random {std::random_device {}()};
-                const auto delay = std::chrono::milliseconds(std::uniform_int_distribution<int> {20, 120}(random));
-                auto timer = std::make_shared<asio::steady_timer>(*ioContext_, delay);
-                timer->async_wait([weak = weak_from_this(), timer, packet = std::move(packet), context, unicast](
-                                      const asio::error_code& error) mutable {
-                    if (error)
-                        return;
-                    const auto self = weak.lock();
-                    if (not self)
-                        return;
-                    if (unicast)
-                        self->transport_.send(std::move(packet), context.source, context.interface);
-                    else
-                        self->transport_.send(std::move(packet), context.interface);
-                });
-            }
-        }
-    }
-
-    void discover(const mdns::Message& message, const mdns::ReceiveContext& context)
-    {
-        PeerDiscoveredCallback callback;
-        std::optional<NetId> network;
-        std::optional<InfoHash> localNode;
-        {
-            std::lock_guard lock(mutex_);
-            callback = discoveryCallback_;
-            network = discoveryNetwork_;
-            if (published_)
-                localNode = published_->nodeId;
-        }
-        if (not callback or not network)
-            return;
-
-        const auto cache = caches_.try_emplace(context.interface).first;
-        for (const auto& service : cache->second.update(message)) {
-            if (service.network != *network or (localNode and service.nodeId == *localNode))
-                continue;
-            for (const auto& address : service.addresses)
-                callback(service.nodeId, socketAddress(address, service.port, context));
-        }
-    }
-
-    std::shared_ptr<asio::io_context> ioContext_;
-    std::shared_ptr<Logger> logger_;
-    mdns::MdnsTransport transport_;
-    asio::steady_timer browseTimer_;
-    asio::steady_timer announceTimer_;
-    asio::steady_timer connectivityTimer_;
-    std::chrono::steady_clock::duration connectivityRetry_ {CONNECTIVITY_RETRY};
-    std::mutex mutex_;
-    std::optional<NetId> discoveryNetwork_;
-    PeerDiscoveredCallback discoveryCallback_;
-    std::optional<mdns::dns_sd::Service> published_;
-    std::map<mdns::InterfaceId, mdns::dns_sd::Cache> caches_;
-};
-
-PeerDiscovery::PeerDiscovery(std::shared_ptr<asio::io_context> ioContext, std::shared_ptr<Logger> logger)
-{
-    if (not ioContext) {
-        ioContext = std::make_shared<asio::io_context>();
-        ioContext_ = ioContext;
-    }
-    impl_ = std::make_shared<Impl>(ioContext, logger);
-    impl_->start();
-
-    if (ioContext_) {
-        ioRunner_ = std::thread([logger = std::move(logger), ioContext = std::move(ioContext)] {
-            try {
-                auto work = asio::make_work_guard(*ioContext);
-                ioContext->run();
-            } catch (const std::exception& error) {
-                if (logger)
-                    logger->error("Peer discovery event loop failed: {}", error.what());
-            }
-        });
-    }
-}
-
-PeerDiscovery::~PeerDiscovery()
-{
-    stop();
-    impl_.reset();
-    if (ioContext_)
-        ioContext_->stop();
-    if (ioRunner_.joinable())
-        ioRunner_.join();
-}
-
-void
-PeerDiscovery::startDiscovery(NetId network, PeerDiscoveredCallback callback)
-{
-    impl_->startDiscovery(network, std::move(callback));
-}
-
-void
-PeerDiscovery::startPublish(const InfoHash& nodeId, NetId network, in_port_t port)
-{
-    impl_->startPublish(nodeId, network, port);
-}
-
-bool
-PeerDiscovery::stopDiscovery()
-{
-    return impl_->stopDiscovery();
-}
-
-bool
-PeerDiscovery::stopPublish()
-{
-    return impl_->stopPublish();
-}
-
-void
-PeerDiscovery::stop()
-{
-    if (impl_)
-        impl_->stop();
-}
-
-void
-PeerDiscovery::connectivityChanged()
-{
-    impl_->connectivityChanged();
-}
-
-void
-PeerDiscovery::stopConnectivityChanged()
-{
-    impl_->stopConnectivityChanged();
-}
-
-} // namespace dht
@@ -6,10 +6,8 @@
 #include <atomic>
 #include <thread>
 #include <iostream>
-#include <cmath> // std::pow
-#if __cplusplus < 202002L
-#include <ciso646>
-#endif
+#include <ciso646> // fix windows compiler bug
+#include <cmath>   // std::pow

 namespace dht {

@@ -238,58 +238,28 @@ operator==(const SockAddr& a, const SockAddr& b)
    return a.equals(b);
 }

-time_point
-from_system_time(system_clock::time_point t, time_point steady_now, system_clock::time_point system_now)
-{
-    if (t == system_clock::time_point::min())
-        return time_point::min();
-    if (t == system_clock::time_point::max())
-        return time_point::max();
-    auto dt = t - system_now;
-    if (dt > system_clock::duration(0) and steady_now > time_point::max() - dt)
-        return time_point::max();
-    else if (dt < system_clock::duration(0) and steady_now < time_point::min() - dt)
-        return time_point::min();
-    return steady_now + dt;
-}
-
-time_point
-from_system_time(system_clock::time_point t)
-{
-    return from_system_time(t, clock::now(), system_clock::now());
-}
-
-system_clock::time_point
-to_system_time(time_point t, time_point steady_now, system_clock::time_point system_now)
-{
-    if (t == time_point::min())
-        return system_clock::time_point::min();
-    if (t == time_point::max())
-        return system_clock::time_point::max();
-    auto dt = t - steady_now;
-    if (dt > duration(0) and system_now >= system_clock::time_point::max() - dt)
-        return system_clock::time_point::max();
-    else if (dt < duration(0) and system_now <= system_clock::time_point::min() - dt)
-        return system_clock::time_point::min();
-    return system_now + std::chrono::duration_cast<system_clock::duration>(dt);
-}
-
-system_clock::time_point
-to_system_time(time_point t)
-{
-    return to_system_time(t, clock::now(), system_clock::now());
-}
-
 time_point
 from_time_t(std::time_t t)
 {
-    return from_system_time(system_clock::from_time_t(t));
+    auto dt = system_clock::from_time_t(t) - system_clock::now();
+    auto now = clock::now();
+    if (dt > system_clock::duration(0) and now > time_point::max() - dt)
+        return time_point::max();
+    else if (dt < system_clock::duration(0) and now < time_point::min() - dt)
+        return time_point::min();
+    return now + dt;
 }

 std::time_t
 to_time_t(time_point t)
 {
-    return system_clock::to_time_t(to_system_time(t));
+    auto dt = t - clock::now();
+    auto now = system_clock::now();
+    if (dt > duration(0) and now >= system_clock::time_point::max() - dt)
+        return system_clock::to_time_t(system_clock::time_point::max());
+    else if (dt < duration(0) and now <= system_clock::time_point::min() - dt)
+        return system_clock::to_time_t(system_clock::time_point::min());
+    return system_clock::to_time_t(now + std::chrono::duration_cast<system_clock::duration>(dt));
 }

 Blob
@@ -202,9 +202,6 @@ Value::Value(const Json::Value& json)
    const auto& jprio = json["prio"];
    if (jprio.isIntegral())
        priority = jprio.asUInt();
-    const auto& jpt = json[VALUE_KEY_PUSHTYPE];
-    if (jpt.isString())
-        pushType = jpt.asString();
 }

 Json::Value
@@ -231,8 +228,6 @@ Value::toJson() const
    }
    if (priority)
        val["prio"] = priority;
-    if (not pushType.empty())
-        val[VALUE_KEY_PUSHTYPE] = pushType;
    return val;
 }

@@ -59,24 +59,6 @@ CryptoTester::testSignatureEncryption()
    }
 }

-void
-CryptoTester::testPublicKeyPemIsPlainText()
-{
-    auto key = dht::crypto::PrivateKey::generate();
-    auto pem = key.getPublicKey().toString();
-
-    // The exported key is PEM text: it must not carry the terminating null
-    // byte GnuTLS counts in the exported size, which would otherwise be
-    // embedded in anything the string is serialized into.
-    CPPUNIT_ASSERT(not pem.empty());
-    CPPUNIT_ASSERT_EQUAL(std::string::npos, pem.find('\0'));
-    CPPUNIT_ASSERT_EQUAL('\n', pem.back());
-
-    // The exported text still reads back as the same key.
-    dht::crypto::PublicKey reloaded(dht::Blob(pem.begin(), pem.end()));
-    CPPUNIT_ASSERT_EQUAL(key.getPublicKey().getId(), reloaded.getId());
-}
-
 void
 CryptoTester::testCertificateRevocation()
 {
@@ -113,159 +95,10 @@ CryptoTester::testCertificateRevocation()
    CPPUNIT_ASSERT_MESSAGE(v.toString(), v);
 }

-namespace {
-
-/** Read a CRL Number extension blob (big-endian, variable length) as an integer. */
-uint64_t
-crlNumberValue(const dht::Blob& number)
-{
-    uint64_t value {0};
-    for (uint8_t byte : number)
-        value = (value << 8) | byte;
-    return value;
-}
-
-} // namespace
-
-void
-CryptoTester::testRevocationListNumber()
-{
-    auto ca = dht::crypto::generateIdentity("ca");
-    auto device = dht::crypto::generateIdentity("dev", ca);
-
-    dht::crypto::RevocationList crl;
-    CPPUNIT_ASSERT_EQUAL(uint64_t(0), crlNumberValue(crl.getNumber()));
-
-    crl.revoke(*device.second);
-    crl.sign(ca);
-    auto first = crl.getNumber();
-    // An unnumbered list gets a random number on its first signature.
-    CPPUNIT_ASSERT(not first.empty());
-    CPPUNIT_ASSERT(crlNumberValue(first) != 0);
-
-    // Re-signing keeps the same lineage and moves the number forward.
-    crl.sign(ca);
-    auto second = crl.getNumber();
-    CPPUNIT_ASSERT_EQUAL(crlNumberValue(first) + 1, crlNumberValue(second));
-
-    crl.sign(ca);
-    CPPUNIT_ASSERT_EQUAL(crlNumberValue(first) + 2, crlNumberValue(crl.getNumber()));
-
-    // The number is a DER integer, so it is stored with leading zeros stripped.
-    // Incrementing must still work for numbers shorter than 8 bytes.
-    for (uint64_t start : {uint64_t(1), uint64_t(0x7f), uint64_t(0x80), uint64_t(0xffff)}) {
-        dht::crypto::RevocationList small;
-        small.revoke(*device.second);
-        small.sign(ca, {}, start);
-        CPPUNIT_ASSERT_EQUAL(start, crlNumberValue(small.getNumber()));
-        small.sign(ca);
-        CPPUNIT_ASSERT_EQUAL(start + 1, crlNumberValue(small.getNumber()));
-        small.sign(ca);
-        CPPUNIT_ASSERT_EQUAL(start + 2, crlNumberValue(small.getNumber()));
-    }
-}
-
-void
-CryptoTester::testRevocationListExplicitNumber()
-{
-    auto ca = dht::crypto::generateIdentity("ca");
-    auto device = dht::crypto::generateIdentity("dev", ca);
-
-    // Values chosen to cover leading zero bytes, a full-width number and the largest
-    // value that still encodes as a positive 8-byte DER integer.
-    const std::vector<uint64_t> numbers {1,
-                                         42,
-                                         0xff,
-                                         0x100,
-                                         0x0000'0001'0000'0000ull,
-                                         0x0000'02a1'0000'0001ull,
-                                         0x7fff'ffff'ffff'ffffull};
-    for (auto number : numbers) {
-        dht::crypto::RevocationList crl;
-        crl.revoke(*device.second);
-        crl.sign(ca, {}, number);
-        CPPUNIT_ASSERT_EQUAL(number, crlNumberValue(crl.getNumber()));
-        CPPUNIT_ASSERT(crl.isSignedBy(*ca.second));
-        CPPUNIT_ASSERT(crl.isRevoked(*device.second));
-
-        // The number must survive a pack/unpack round-trip.
-        dht::crypto::RevocationList unpacked(crl.getPacked());
-        CPPUNIT_ASSERT_EQUAL(number, crlNumberValue(unpacked.getNumber()));
-    }
-
-    // An explicit number overrides the increment, in both directions.
-    dht::crypto::RevocationList crl;
-    crl.revoke(*device.second);
-    crl.sign(ca, {}, 1000);
-    CPPUNIT_ASSERT_EQUAL(uint64_t(1000), crlNumberValue(crl.getNumber()));
-    crl.sign(ca, {}, 5);
-    CPPUNIT_ASSERT_EQUAL(uint64_t(5), crlNumberValue(crl.getNumber()));
-
-    // Passing 0 falls back to the default behavior: increment the current number.
-    crl.sign(ca, {}, 0);
-    CPPUNIT_ASSERT_EQUAL(uint64_t(6), crlNumberValue(crl.getNumber()));
-}
-
-void
-CryptoTester::testRevocationListPartitionedNumber()
-{
-    // Two devices holding the same authority issue revocation lists independently.
-    // RFC 5280 5.2.3 requires CRL numbers to increase monotonically for a given CRL
-    // scope and issuer; partitioning the low bits by device keeps each sequence
-    // monotonic while making collisions between devices impossible.
-    constexpr unsigned TAG_BITS = 24;
-    constexpr uint64_t TAG_A = 0x0a0b0c;
-    constexpr uint64_t TAG_B = 0x0a0b0d;
-
-    auto ca = dht::crypto::generateIdentity("ca");
-    auto account = dht::crypto::generateIdentity("acc", ca, 4096, true);
-    auto deviceA = dht::crypto::generateIdentity("devA", account);
-    auto deviceB = dht::crypto::generateIdentity("devB", account);
-
-    uint64_t previous {0};
-    dht::crypto::RevocationList crlA;
-    for (unsigned i = 1; i <= 4; i++) {
-        crlA.revoke(*deviceA.second);
-        crlA.sign(account, {}, (uint64_t(i) << TAG_BITS) | TAG_A);
-        auto number = crlNumberValue(crlA.getNumber());
-        CPPUNIT_ASSERT_EQUAL(TAG_A, number & ((uint64_t(1) << TAG_BITS) - 1));
-        CPPUNIT_ASSERT(number > previous);
-        CPPUNIT_ASSERT_EQUAL(uint64_t(0), number >> 63);
-        previous = number;
-    }
-
-    // Both devices branch from the same counter but never mint the same number.
-    dht::crypto::RevocationList branchA;
-    branchA.revoke(*deviceA.second);
-    branchA.sign(account, {}, (uint64_t(9) << TAG_BITS) | TAG_A);
-    dht::crypto::RevocationList branchB;
-    branchB.revoke(*deviceB.second);
-    branchB.sign(account, {}, (uint64_t(9) << TAG_BITS) | TAG_B);
-    CPPUNIT_ASSERT(crlNumberValue(branchA.getNumber()) != crlNumberValue(branchB.getNumber()));
-
-    // Both are valid and revoke only their own target.
-    CPPUNIT_ASSERT(branchA.isSignedBy(*account.second));
-    CPPUNIT_ASSERT(branchB.isSignedBy(*account.second));
-    CPPUNIT_ASSERT(branchA.isRevoked(*deviceA.second));
-    CPPUNIT_ASSERT(not branchA.isRevoked(*deviceB.second));
-    CPPUNIT_ASSERT(branchB.isRevoked(*deviceB.second));
-    CPPUNIT_ASSERT(not branchB.isRevoked(*deviceA.second));
-
-    // A number minted by an older client is fully random, so bit 63 may be set. Masking
-    // it out and taking the counter part still yields a strictly greater number.
-    constexpr uint64_t legacy = 0xdead'beef'0123'4567ull;
-    dht::crypto::RevocationList legacyCrl;
-    legacyCrl.revoke(*deviceA.second);
-    legacyCrl.sign(account, {}, legacy);
-    auto counter = ((crlNumberValue(legacyCrl.getNumber()) & ~(uint64_t(1) << 63)) >> TAG_BITS) + 1;
-    legacyCrl.sign(account, {}, (counter << TAG_BITS) | TAG_A);
-    CPPUNIT_ASSERT(crlNumberValue(legacyCrl.getNumber()) > (legacy & ~(uint64_t(1) << 63)));
-    CPPUNIT_ASSERT_EQUAL(uint64_t(0), crlNumberValue(legacyCrl.getNumber()) >> 63);
-}
-
 void
 CryptoTester::testCertificateRequest()
-{    // Generate CA
+{
+    // Generate CA
    auto ca = dht::crypto::generateIdentity("Test CA");

    // Generate signed request
@@ -316,15 +149,6 @@ CryptoTester::testCertificateSerialNumber()
    };
    auto serial = dht::crypto::Certificate(cert_pem).getSerialNumber();
    CPPUNIT_ASSERT(std::equal(SERIAL.begin(), SERIAL.end(), serial.begin(), serial.end()));
-
-    auto key = dht::crypto::PrivateKey::generateEC();
-    for (unsigned i = 0; i < 32; i++) {
-        auto generated = dht::crypto::Certificate::generate(key, "generated", {});
-        auto generatedSerial = generated.getSerialNumber();
-        CPPUNIT_ASSERT(not generatedSerial.empty());
-        CPPUNIT_ASSERT_EQUAL(uint8_t {0}, uint8_t(generatedSerial.front() & 0x80));
-        CPPUNIT_ASSERT(std::any_of(generatedSerial.begin(), generatedSerial.end(), [](uint8_t byte) { return byte != 0; }));
-    }
 }

 void
@@ -12,11 +12,7 @@ class CryptoTester : public CppUnit::TestFixture
 {
    CPPUNIT_TEST_SUITE(CryptoTester);
    CPPUNIT_TEST(testSignatureEncryption);
-    CPPUNIT_TEST(testPublicKeyPemIsPlainText);
    CPPUNIT_TEST(testCertificateRevocation);
-    CPPUNIT_TEST(testRevocationListNumber);
-    CPPUNIT_TEST(testRevocationListExplicitNumber);
-    CPPUNIT_TEST(testRevocationListPartitionedNumber);
    CPPUNIT_TEST(testCertificateRequest);
    CPPUNIT_TEST(testCertificateSerialNumber);
    CPPUNIT_TEST(testOcsp);
@@ -40,26 +36,10 @@ public:
     * Test data signature, encryption and decryption
     */
    void testSignatureEncryption();
-    /**
-     * Test that an exported public key is text only, with no embedded null byte
-     */
-    void testPublicKeyPemIsPlainText();
    /**
     * Test certificate generation, validation and revocation
     */
    void testCertificateRevocation();
-    /**
-     * Test the default CRL Number behavior: random on first signature, incremented after
-     */
-    void testRevocationListNumber();
-    /**
-     * Test signing a revocation list with a caller-provided CRL Number
-     */
-    void testRevocationListExplicitNumber();
-    /**
-     * Test that issuers sharing an authority can partition the CRL Number space
-     */
-    void testRevocationListPartitionedNumber();
    /**
     * Test certificate requests
     */
@@ -9,8 +9,6 @@
 #include <future>
 #include <mutex>
 #include <condition_variable>
-#include <fstream>
-#include <cstdio>
 using namespace std::chrono_literals;
 using namespace std::literals;

@@ -210,42 +208,6 @@ DhtRunnerTester::testImportValuesPreservesRemoteQuota()
    restored.join();
 }

-void
-DhtRunnerTester::testExportValuesUsesSystemTime()
-{
-    auto key = dht::InfoHash::get("export-system-time");
-    const auto created = dht::clock::now();
-    msgpack::sbuffer importBuffer;
-    msgpack::packer<msgpack::sbuffer> pk(&importBuffer);
-    pk.pack_array(1);
-    pk.pack_array(2);
-    pk.pack(created.time_since_epoch().count());
-    dht::Value {std::string("persisted")}.msgpack_pack(pk);
-    node1.importValues({
-        dht::ValuesExport {key, {importBuffer.data(), importBuffer.data() + importBuffer.size()}}
-    });
-
-    auto exported = node1.exportValues();
-    CPPUNIT_ASSERT_EQUAL(size_t(1), exported.size());
-
-    msgpack::unpacked msg;
-    msgpack::unpack(msg, reinterpret_cast<const char*>(exported.front().second.data()), exported.front().second.size());
-    const auto values = msg.get();
-    CPPUNIT_ASSERT(values.type == msgpack::type::ARRAY);
-    CPPUNIT_ASSERT_EQUAL(uint32_t(1), values.via.array.size);
-    const auto& persistedValue = values.via.array.ptr[0];
-    CPPUNIT_ASSERT_EQUAL(uint32_t(4), persistedValue.via.array.size);
-    CPPUNIT_ASSERT(persistedValue.via.array.ptr[0].type == msgpack::type::EXT);
-    CPPUNIT_ASSERT(persistedValue.via.array.ptr[3].type == msgpack::type::EXT);
-
-    const auto persistedCreated = persistedValue.via.array.ptr[0].as<std::chrono::system_clock::time_point>();
-    const auto persistedExpiration = persistedValue.via.array.ptr[3].as<std::chrono::system_clock::time_point>();
-    const auto delta = std::chrono::system_clock::now() - persistedCreated;
-    CPPUNIT_ASSERT(delta >= std::chrono::system_clock::duration::zero());
-    CPPUNIT_ASSERT(delta < 5s);
-    CPPUNIT_ASSERT(persistedExpiration > persistedCreated);
-}
-
 void
 DhtRunnerTester::testImportValuesPreservesStoredExpiration()
 {
@@ -303,25 +265,14 @@ DhtRunnerTester::testImportValuesPreservesStoredExpiration()
 void
 DhtRunnerTester::testImportPermanentValueExpires()
 {
-    static const dht::ValueType SHORT_TYPE {201, "Short perm", 500ms};
-
-    dht::DhtRunner::Config config;
-    config.dht_config.node_config.max_peer_req_per_sec = -1;
-    config.dht_config.node_config.max_req_per_sec = -1;
-    config.dht_config.node_config.max_store_size = -1;
-    config.dht_config.node_config.max_store_keys = -1;
-    dht::DhtRunner restored;
-    restored.run(0, config);
-    restored.registerInsecureType(SHORT_TYPE);
-
-    // Ensure the runner is waiting on a previously computed scheduler deadline.
-    std::promise<void> loopCompleted;
-    auto loopCompletedFuture = loopCompleted.get_future();
-    restored.getNodeInfo([&loopCompleted](auto) { loopCompleted.set_value(); });
-    getFutureValue(std::move(loopCompletedFuture));
+    // Simulate importing a value that was originally stored as permanent
+    // (expiration = time_point::max()). After import the permanent flag is lost,
+    // so the value must expire within the type's normal expiration window.
+    static const dht::ValueType SHORT_TYPE {201, "Short perm", 2s};

    auto key = dht::InfoHash::get("import-permanent-expiration");
    auto now = dht::clock::now();
+
    msgpack::sbuffer buffer;
    msgpack::packer<msgpack::sbuffer> pk(&buffer);
    pk.pack_array(1);
@@ -329,33 +280,63 @@ DhtRunnerTester::testImportPermanentValueExpires()
    pk.pack(now.time_since_epoch().count());
    dht::Value {SHORT_TYPE.id, std::string("was-permanent")}.msgpack_pack(pk);
    pk.pack_bin(0);
+    // Permanent values are exported with time_point::max() expiration
    pk.pack(dht::clock::time_point::max().time_since_epoch().count());

+    dht::DhtRunner restored;
+    dht::DhtRunner::Config config;
+    config.dht_config.node_config.max_peer_req_per_sec = -1;
+    config.dht_config.node_config.max_req_per_sec = -1;
+    config.dht_config.node_config.max_store_size = -1;
+    config.dht_config.node_config.max_store_keys = -1;
+    restored.run(0, config);
+
    restored.importValues({
        dht::ValuesExport {key, {buffer.data(), buffer.data() + buffer.size()}}
    });

-    auto containsValue = [&] {
-        for (const auto& [exportedKey, data] : restored.exportValues()) {
-            if (exportedKey != key)
-                continue;
+    // Value should be present right after import
+    auto exportedBefore = restored.exportValues();
+    CPPUNIT_ASSERT(!exportedBefore.empty());
+
+    // Wait longer than the default USER_DATA expiration (10 min) is not
+    // practical, but the type is unregistered so the default 10 min expiration
+    // applies.  Instead, register the short type so the cap uses 2 s.
+    // Re-import into a fresh node that knows the short type.
+    dht::DhtRunner restored2;
+    restored2.run(0, config);
+    restored2.registerInsecureType(SHORT_TYPE);
+    restored2.importValues({
+        dht::ValuesExport {key, {buffer.data(), buffer.data() + buffer.size()}}
+    });
+
+    CPPUNIT_ASSERT(!restored2.exportValues().empty());
+
+    // Wait for the short expiration to pass
+    std::this_thread::sleep_for(3s);
+
+    auto restoredValues = restored2.exportValues();
+    bool found = false;
+    for (const auto& ve : restoredValues) {
+        if (ve.first == key) {
            msgpack::unpacked msg;
-            msgpack::unpack(msg, reinterpret_cast<const char*>(data.data()), data.size());
+            msgpack::unpack(msg, (const char*) ve.second.data(), ve.second.size());
            auto valarr = msg.get();
            CPPUNIT_ASSERT(valarr.type == msgpack::type::ARRAY);
-            return valarr.via.array.size != 0;
+            // The value should have expired
+            CPPUNIT_ASSERT_EQUAL(uint32_t(0), valarr.via.array.size);
+            found = true;
        }
-        return false;
-    };
-
-    CPPUNIT_ASSERT(containsValue());
-    auto timeout = dht::clock::now() + 2s;
-    while (containsValue() and dht::clock::now() < timeout)
-        std::this_thread::sleep_for(10ms);
-    CPPUNIT_ASSERT(!containsValue());
+    }
+    // Either the key was cleaned up entirely or it was found with 0 values
+    CPPUNIT_ASSERT(found || restoredValues.empty()
+                   || std::none_of(restoredValues.begin(), restoredValues.end(),
+                                   [&](const auto& ve) { return ve.first == key; }));

    restored.shutdown();
    restored.join();
+    restored2.shutdown();
+    restored2.join();
 }

 void
@@ -559,34 +540,6 @@ DhtRunnerTester::testShutdownCompletesWithPendingPut()
    clientNode.join();
 }

-void
-DhtRunnerTester::testSavedPortFallback()
-{
-    // A saved port that is already taken by another process (e.g. fast
-    // application restart while the old instance still holds it) must not
-    // prevent the node from starting: it should fall back to a random port.
-    dht::DhtRunner::Config config;
-    config.dht_config.node_config.persist_path = "/tmp/opendht_test_port_fallback";
-    std::string portFile = config.dht_config.node_config.persist_path + "_port.txt";
-
-    // node1 (from setUp) holds a port; save it as our persisted port.
-    auto takenPort = node1.getBoundPort();
-    {
-        std::ofstream out(portFile);
-        out << takenPort << std::endl << takenPort << std::endl;
-    }
-
-    dht::DhtRunner testNode;
-    CPPUNIT_ASSERT_NO_THROW(testNode.run(0, config));
-    CPPUNIT_ASSERT(testNode.getBoundPort());
-    CPPUNIT_ASSERT(testNode.getBoundPort() != takenPort);
-
-    testNode.shutdown();
-    testNode.join();
-    std::remove(portFile.c_str());
-    std::remove((config.dht_config.node_config.persist_path + "_port.txt").c_str());
-}
-
 void
 DhtRunnerTester::testListen()
 {
@@ -21,14 +21,12 @@ class DhtRunnerTester : public CppUnit::TestFixture
    CPPUNIT_TEST(testListenLotOfBytes);
    CPPUNIT_TEST(testIdOps);
    CPPUNIT_TEST(testImportValuesPreservesRemoteQuota);
-    CPPUNIT_TEST(testExportValuesUsesSystemTime);
    CPPUNIT_TEST(testImportValuesPreservesStoredExpiration);
    CPPUNIT_TEST(testImportPermanentValueExpires);
    CPPUNIT_TEST(testBootstrapSetsConnectingState);
    CPPUNIT_TEST(testBootstrapThenPutNoRace);
    CPPUNIT_TEST(testBootstrapMissingNodeThenPutFails);
    CPPUNIT_TEST(testShutdownCompletesWithPendingPut);
-    CPPUNIT_TEST(testSavedPortFallback);
    CPPUNIT_TEST_SUITE_END();

    dht::DhtRunner node1 {};
@@ -68,14 +66,12 @@ public:
     */
    void testIdOps();
    void testImportValuesPreservesRemoteQuota();
-    void testExportValuesUsesSystemTime();
    void testImportValuesPreservesStoredExpiration();
    void testImportPermanentValueExpires();
    void testBootstrapSetsConnectingState();
    void testBootstrapThenPutNoRace();
    void testBootstrapMissingNodeThenPutFails();
    void testShutdownCompletesWithPendingPut();
-    void testSavedPortFallback();
    /**
     * Test listen method with lot of datas
     */
@@ -8,7 +8,6 @@

 #include <iostream>
 #include <string>
-#include <atomic>
 #include <chrono>
 #include <condition_variable>

@@ -333,36 +332,6 @@ HttpTester::test_parse_url_just_slash()
    CPPUNIT_ASSERT_EQUAL(std::string("/"), parsed.target);
 }

-void
-HttpTester::test_completed_resolver_callback_uses_io_thread()
-{
-    asio::io_context ioContext;
-    const asio::ip::tcp::endpoint endpoint(asio::ip::address_v4::loopback(), 80);
-    dht::http::Resolver resolver(ioContext, {endpoint});
-    const auto callerThread = std::this_thread::get_id();
-    std::thread::id callbackThread;
-    asio::error_code callbackError;
-    std::vector<asio::ip::tcp::endpoint> resolvedEndpoints;
-    std::atomic_bool callbackCalled {false};
-
-    resolver.add_callback([&](const asio::error_code& ec, const auto& endpoints) {
-        callbackError = ec;
-        callbackThread = std::this_thread::get_id();
-        resolvedEndpoints = endpoints;
-        callbackCalled = true;
-    });
-
-    CPPUNIT_ASSERT(!callbackCalled);
-    std::thread ioThread([&] { ioContext.run(); });
-    ioThread.join();
-
-    CPPUNIT_ASSERT(callbackCalled);
-    CPPUNIT_ASSERT(!callbackError);
-    CPPUNIT_ASSERT(callbackThread != callerThread);
-    CPPUNIT_ASSERT_EQUAL(size_t(1), resolvedEndpoints.size());
-    CPPUNIT_ASSERT_EQUAL(endpoint, resolvedEndpoints.front());
-}
-
 void
 HttpTester::test_send_json()
 {
@@ -39,7 +39,6 @@ class HttpTester : public CppUnit::TestFixture
    CPPUNIT_TEST(test_parse_url_complex_path_query_fragment);
    CPPUNIT_TEST(test_parse_url_empty);
    CPPUNIT_TEST(test_parse_url_just_slash);
-    CPPUNIT_TEST(test_completed_resolver_callback_uses_io_thread);
    // send
    CPPUNIT_TEST(test_send_json);
    CPPUNIT_TEST_SUITE_END();
@@ -83,7 +82,6 @@ public:
    void test_parse_url_complex_path_query_fragment();
    void test_parse_url_empty();
    void test_parse_url_just_slash();
-    void test_completed_resolver_callback_uses_io_thread();
    /**
     * Test send(json)
     */
@@ -1,280 +0,0 @@
-// Copyright (c) 2014-2026 Savoir-faire Linux Inc.
-// SPDX-License-Identifier: MIT
-
-#include "test_mdns.h"
-
-#include "../src/peer_discovery/dns_sd.h"
-#include "../src/peer_discovery/mdns.h"
-#include "../src/peer_discovery/mdns_transport.h"
-
-#include <array>
-#include <string>
-
-namespace test {
-
-using namespace dht::mdns;
-
-CPPUNIT_TEST_SUITE_REGISTRATION(MdnsTester);
-
-void
-MdnsTester::testName()
-{
-    const auto name = Name::fromString("Node._opendht._udp.local.");
-    CPPUNIT_ASSERT_EQUAL(std::string("Node._opendht._udp.local."), name.toString());
-    CPPUNIT_ASSERT(name == Name::fromString("node._OpenDHT._UDP.LOCAL"));
-    CPPUNIT_ASSERT_THROW(Name::fromString("bad..local."), ParseError);
-    CPPUNIT_ASSERT_THROW(Name::fromString(std::string(64, 'a') + ".local."), ParseError);
-}
-
-void
-MdnsTester::testRecordRoundTrip()
-{
-    const auto service = Name::fromString("_opendht._udp.local.");
-    const auto instance = Name::fromString("0123456789abcdef0123456789abcdef01234567._opendht._udp.local.");
-    const auto host = Name::fromString("0123456789abcdef0123456789abcdef01234567.local.");
-
-    Message message;
-    message.response = true;
-    message.authoritative = true;
-    message.answers.push_back({service, Type::PTR, CLASS_IN, false, 4500, PtrData {instance}});
-    message.additionals.push_back({
-        instance, Type::SRV, CLASS_IN, true, 120, SrvData {0, 0, 4222, host}
-    });
-    message.additionals.push_back(
-        {instance,
-         Type::TXT,
-         CLASS_IN,
-         true,
-         4500,
-         TxtData {{{'t', 'x', 't', 'v', 'e', 'r', 's', '=', '1'}, {'n', 'e', 't', '=', '0'}}}});
-    message.additionals.push_back({host, Type::A, CLASS_IN, true, 120, AData {{192, 0, 2, 1}}});
-    message.additionals.push_back(
-        {host, Type::AAAA, CLASS_IN, true, 120, AaaaData {{0x20, 0x01, 0x0d, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}}});
-    message.additionals.push_back({
-        host, Type::NSEC, CLASS_IN, true, 120, NsecData {host, {Type::A, Type::AAAA}}
-    });
-
-    const auto packet = encode(message);
-    const auto decoded = decode(packet.data(), packet.size());
-
-    CPPUNIT_ASSERT(decoded.response);
-    CPPUNIT_ASSERT(decoded.authoritative);
-    CPPUNIT_ASSERT_EQUAL(size_t(1), decoded.answers.size());
-    CPPUNIT_ASSERT_EQUAL(size_t(5), decoded.additionals.size());
-    CPPUNIT_ASSERT(decoded == message);
-}
-
-void
-MdnsTester::testCompression()
-{
-    Message message;
-    message.questions.push_back({Name::fromString("_opendht._udp.local."), Type::PTR, CLASS_IN, false});
-    message.questions.push_back({Name::fromString("node._opendht._udp.local."), Type::SRV, CLASS_IN, false});
-
-    const auto packet = encode(message);
-    CPPUNIT_ASSERT(std::find(packet.begin(), packet.end(), uint8_t {0xc0}) != packet.end());
-    CPPUNIT_ASSERT(decode(packet.data(), packet.size()) == message);
-}
-
-void
-MdnsTester::testMalformedPackets()
-{
-    const std::array<uint8_t, 3> truncated {
-        {0, 0, 0}
-    };
-    CPPUNIT_ASSERT_THROW(decode(truncated.data(), truncated.size()), ParseError);
-
-    const std::array<uint8_t, 18> compressionLoop {
-        {
-         0, 0,
-         0, 0,
-         0, 1,
-         0, 0,
-         0, 0,
-         0, 0,
-         0xc0, 0x0c,
-         0, static_cast<uint8_t>(Type::PTR),
-         0, CLASS_IN,
-         }
-    };
-    CPPUNIT_ASSERT_THROW(decode(compressionLoop.data(), compressionLoop.size()), ParseError);
-}
-
-void
-MdnsTester::testPacketSizeLimit()
-{
-    std::array<uint8_t, MAX_PACKET_SIZE + 1> oversized {};
-    CPPUNIT_ASSERT_THROW(decode(oversized.data(), oversized.size()), ParseError);
-}
-
-void
-MdnsTester::testDnsSdAdvertisement()
-{
-    dns_sd::Service service;
-    service.nodeId = dht::InfoHash("0123456789abcdef0123456789abcdef01234567");
-    service.network = 42;
-    service.port = 4222;
-    service.addresses.emplace_back(AData {
-        {192, 0, 2, 1}
-    });
-    service.addresses.emplace_back(AaaaData {
-        {0x20, 0x01, 0x0d, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}
-    });
-
-    const auto message = dns_sd::announcement(service);
-    CPPUNIT_ASSERT(message.response);
-    CPPUNIT_ASSERT(message.authoritative);
-    CPPUNIT_ASSERT_EQUAL(size_t(1), message.answers.size());
-    CPPUNIT_ASSERT_EQUAL(size_t(4), message.additionals.size());
-    CPPUNIT_ASSERT_EQUAL(std::string("_opendht._udp.local."), message.answers.front().name.toString());
-
-    const auto resolved = dns_sd::resolve(message);
-    CPPUNIT_ASSERT(resolved);
-    CPPUNIT_ASSERT_EQUAL(service.nodeId, resolved->nodeId);
-    CPPUNIT_ASSERT_EQUAL(service.network, resolved->network);
-    CPPUNIT_ASSERT_EQUAL(service.port, resolved->port);
-    CPPUNIT_ASSERT_EQUAL(service.addresses.size(), resolved->addresses.size());
-}
-
-void
-MdnsTester::testDnsSdGoodbye()
-{
-    dns_sd::Service service;
-    service.nodeId = dht::InfoHash("0123456789abcdef0123456789abcdef01234567");
-    service.port = 4222;
-    service.addresses.emplace_back(AData {
-        {192, 0, 2, 1}
-    });
-
-    const auto message = dns_sd::goodbye(service);
-    CPPUNIT_ASSERT(std::all_of(message.answers.begin(), message.answers.end(), [](const auto& record) {
-        return record.ttl == 0;
-    }));
-    CPPUNIT_ASSERT(std::all_of(message.additionals.begin(), message.additionals.end(), [](const auto& record) {
-        return record.ttl == 0;
-    }));
-}
-
-void
-MdnsTester::testDnsSdValidation()
-{
-    dns_sd::Service service;
-    service.nodeId = dht::InfoHash("0123456789abcdef0123456789abcdef01234567");
-    service.network = 42;
-    service.port = 4222;
-    service.addresses.emplace_back(AData {
-        {192, 0, 2, 1}
-    });
-
-    auto message = dns_sd::announcement(service);
-    auto& txt = std::get<TxtData>(message.additionals[1].data);
-    txt.strings.push_back({'n', 'e', 't', '=', '4', '3'});
-    CPPUNIT_ASSERT(not dns_sd::resolve(message));
-
-    message = dns_sd::announcement(service);
-    auto& srv = std::get<SrvData>(message.additionals[0].data);
-    srv.target = Name::fromString("other.local.");
-    CPPUNIT_ASSERT(not dns_sd::resolve(message));
-
-    CPPUNIT_ASSERT_THROW(dns_sd::announcement({}), ParseError);
-}
-
-void
-MdnsTester::testDnsSdQueryResponse()
-{
-    dns_sd::Service service;
-    service.nodeId = dht::InfoHash("0123456789abcdef0123456789abcdef01234567");
-    service.network = 42;
-    service.port = 4222;
-    service.addresses.emplace_back(AData {
-        {192, 0, 2, 1}
-    });
-
-    const auto query = dns_sd::browseQuery();
-    CPPUNIT_ASSERT(not query.response);
-    CPPUNIT_ASSERT_EQUAL(size_t(1), query.questions.size());
-    CPPUNIT_ASSERT(query.questions.front().name == dns_sd::serviceName());
-    CPPUNIT_ASSERT(query.questions.front().type == Type::PTR);
-
-    const auto response = dns_sd::respond(query, service);
-    CPPUNIT_ASSERT(response);
-    CPPUNIT_ASSERT(dns_sd::resolve(*response));
-
-    auto knownAnswerQuery = query;
-    knownAnswerQuery.answers = response->answers;
-    CPPUNIT_ASSERT(not dns_sd::respond(knownAnswerQuery, service));
-
-    knownAnswerQuery.answers.front().ttl = dns_sd::SERVICE_RECORD_TTL / 2;
-    CPPUNIT_ASSERT(dns_sd::respond(knownAnswerQuery, service));
-
-    Message metaQuery;
-    const auto metaName = Name::fromString("_services._dns-sd._udp.local.");
-    metaQuery.questions.push_back({metaName, Type::PTR, CLASS_IN, false});
-    const auto metaResponse = dns_sd::respond(metaQuery, service);
-    CPPUNIT_ASSERT(metaResponse);
-    CPPUNIT_ASSERT_EQUAL(size_t(1), metaResponse->answers.size());
-    CPPUNIT_ASSERT(metaResponse->answers.front().name == metaName);
-    CPPUNIT_ASSERT(std::get<PtrData>(metaResponse->answers.front().data).name == dns_sd::serviceName());
-    CPPUNIT_ASSERT(metaResponse->additionals.empty());
-
-    metaQuery.answers = metaResponse->answers;
-    CPPUNIT_ASSERT(not dns_sd::respond(metaQuery, service));
-}
-
-void
-MdnsTester::testDnsSdCache()
-{
-    dns_sd::Service service;
-    service.nodeId = dht::InfoHash("0123456789abcdef0123456789abcdef01234567");
-    service.network = 42;
-    service.port = 4222;
-    service.addresses.emplace_back(AData {
-        {192, 0, 2, 1}
-    });
-
-    auto now = dns_sd::Cache::Clock::now();
-    dns_sd::Cache cache([&] { return now; });
-    auto ptr = dns_sd::announcement(service);
-    auto details = ptr;
-    ptr.additionals.clear();
-    details.answers.clear();
-
-    CPPUNIT_ASSERT(cache.update(ptr).empty());
-    const auto discovered = cache.update(details);
-    CPPUNIT_ASSERT_EQUAL(size_t(1), discovered.size());
-    CPPUNIT_ASSERT_EQUAL(service.nodeId, discovered.front().nodeId);
-    CPPUNIT_ASSERT_EQUAL(size_t(1), cache.services().size());
-
-    now += std::chrono::seconds(dns_sd::HOST_RECORD_TTL + 1);
-    CPPUNIT_ASSERT(cache.services().empty());
-}
-
-void
-MdnsTester::testInterfaceScoping()
-{
-    const std::vector<InterfaceAddress> addresses {
-        {1, 1, asio::ip::make_address("192.0.2.1"), true,  false},
-        {1, 1, asio::ip::make_address("fe80::1"),   true,  false},
-        {2, 2, asio::ip::make_address("fe80::2"),   true,  false},
-        {3, 3, asio::ip::make_address("fe80::3"),   false, false},
-        {4, 4, asio::ip::make_address("::1"),       true,  true },
-    };
-
-    const auto interfaces = groupInterfaces(addresses);
-    CPPUNIT_ASSERT_EQUAL(size_t(2), interfaces.size());
-    CPPUNIT_ASSERT_EQUAL(InterfaceId {1}, interfaces[0].id);
-    CPPUNIT_ASSERT_EQUAL(size_t(2), interfaces[0].addresses.size());
-    CPPUNIT_ASSERT_EQUAL(InterfaceId {2}, interfaces[1].id);
-    CPPUNIT_ASSERT_EQUAL(size_t(1), interfaces[1].addresses.size());
-
-    dns_sd::Service service;
-    service.nodeId = dht::InfoHash("0123456789abcdef0123456789abcdef01234567");
-    service.port = 4222;
-    service.addresses = interfaces[0].addresses;
-    const auto announcement = dns_sd::announcement(service);
-    const auto resolved = dns_sd::resolve(announcement);
-    CPPUNIT_ASSERT(resolved);
-    CPPUNIT_ASSERT(resolved->addresses == interfaces[0].addresses);
-}
-
-} // namespace test
@@ -1,40 +0,0 @@
-// Copyright (c) 2014-2026 Savoir-faire Linux Inc.
-// SPDX-License-Identifier: MIT
-#pragma once
-
-#include <cppunit/TestFixture.h>
-#include <cppunit/extensions/HelperMacros.h>
-
-namespace test {
-
-class MdnsTester : public CppUnit::TestFixture
-{
-    CPPUNIT_TEST_SUITE(MdnsTester);
-    CPPUNIT_TEST(testName);
-    CPPUNIT_TEST(testRecordRoundTrip);
-    CPPUNIT_TEST(testCompression);
-    CPPUNIT_TEST(testMalformedPackets);
-    CPPUNIT_TEST(testPacketSizeLimit);
-    CPPUNIT_TEST(testDnsSdAdvertisement);
-    CPPUNIT_TEST(testDnsSdGoodbye);
-    CPPUNIT_TEST(testDnsSdValidation);
-    CPPUNIT_TEST(testDnsSdQueryResponse);
-    CPPUNIT_TEST(testDnsSdCache);
-    CPPUNIT_TEST(testInterfaceScoping);
-    CPPUNIT_TEST_SUITE_END();
-
-public:
-    void testName();
-    void testRecordRoundTrip();
-    void testCompression();
-    void testMalformedPackets();
-    void testPacketSizeLimit();
-    void testDnsSdAdvertisement();
-    void testDnsSdGoodbye();
-    void testDnsSdValidation();
-    void testDnsSdQueryResponse();
-    void testDnsSdCache();
-    void testInterfaceScoping();
-};
-
-} // namespace test
@@ -214,12 +214,9 @@ makeEngine(std::unique_ptr<TestDatagramSocket>&& socket,
           std::mt19937_64& rd,
           int& onNewNodeCalls)
 {
-    net::NetworkConfig config {};
-    config.max_req_per_sec = -1;
-    config.max_peer_req_per_sec = -1;
    return net::NetworkEngine(
        myid,
-        config,
+        {},
        std::move(socket),
        {},
        rd,
@@ -237,21 +234,6 @@ makeEngine(std::unique_ptr<TestDatagramSocket>&& socket,
        [](Sp<Node>, const InfoHash&, const Blob&, const Value::Id&) { return net::RequestAnswer {}; });
 }

-static Sp<Node>
-addPendingGetRequest(net::NetworkEngine& engine, const InfoHash& id, const SockAddr& addr, Tid tid)
-{
-    auto node = engine.insertNode(id, addr);
-    auto request = std::make_shared<net::Request>(
-        MessageType::GetValues,
-        tid,
-        node,
-        Blob {},
-        [](const net::Request&, ParsedMessage&&) {},
-        [](const net::Request&, bool) {});
-    node->requested(request);
-    return node;
-}
-
 void
 NetworkEngineTester::setUp()
 {}
@@ -261,130 +243,24 @@ NetworkEngineTester::tearDown()
 {}

 void
-NetworkEngineTester::testCompletesPartialSessionWithDataBeforeHeader()
+NetworkEngineTester::testIgnoresUnknownPartialData()
 {
    Scheduler scheduler;
    std::mt19937_64 rd(0);
    InfoHash myid = InfoHash::getRandom(rd);
-    InfoHash remoteId = InfoHash::getRandom(rd);
    int onNewNodeCalls = 0;
    auto engine = makeEngine(std::make_unique<TestDatagramSocket>(), scheduler, myid, rd, onNewNodeCalls);

-    auto serialized = serializeValue("fragment before header");
+    Blob fragment = {1, 2, 3};
+    auto packet = makeValueDataPacketBlob(99, 0, 0, fragment);
    auto from = makeIPv4("127.0.0.2", 5000);
-    addPendingGetRequest(engine, remoteId, from, 99);
-    auto initialOnNewNodeCalls = onNewNodeCalls;
-    auto fragment = makeValueDataPacketBlob(99, 0, 0, serialized);
-    auto header = makeReplyHeaderPacketBlob(remoteId, 99, {serialized.size()});

-    engine.processMessage(fragment.data(), fragment.size(), from);
-    CPPUNIT_ASSERT_EQUAL((size_t) 1, engine.getPartialCount());
-    CPPUNIT_ASSERT_EQUAL(initialOnNewNodeCalls, onNewNodeCalls);
-
-    engine.processMessage(header.data(), header.size(), from);
-
-    CPPUNIT_ASSERT_EQUAL((size_t) 0, engine.getPartialCount());
-    CPPUNIT_ASSERT(onNewNodeCalls > initialOnNewNodeCalls);
-}
-
-void
-NetworkEngineTester::testBuffersLargeValueBeforeHeader()
-{
-    Scheduler scheduler;
-    std::mt19937_64 rd(8);
-    InfoHash myid = InfoHash::getRandom(rd);
-    InfoHash remoteId = InfoHash::getRandom(rd);
-    int onNewNodeCalls = 0;
-    auto engine = makeEngine(std::make_unique<TestDatagramSocket>(), scheduler, myid, rd, onNewNodeCalls);
-
-    auto serialized = serializeValue(std::string(57 * 1024, 'l'));
-    auto from = makeIPv4("127.0.0.2", 5008);
-    addPendingGetRequest(engine, remoteId, from, 101);
-    auto initialOnNewNodeCalls = onNewNodeCalls;
-    for (size_t offset = 0; offset < serialized.size(); offset += TEST_MTU) {
-        auto end = std::min(offset + TEST_MTU, serialized.size());
-        Blob data(serialized.begin() + offset, serialized.begin() + end);
-        auto fragment = makeValueDataPacketBlob(101, 0, offset, data);
-        engine.processMessage(fragment.data(), fragment.size(), from);
-    }
-    CPPUNIT_ASSERT_EQUAL((size_t) 1, engine.getPartialCount());
-
-    auto header = makeReplyHeaderPacketBlob(remoteId, 101, {serialized.size()});
-    engine.processMessage(header.data(), header.size(), from);
-
-    CPPUNIT_ASSERT_EQUAL((size_t) 0, engine.getPartialCount());
-    CPPUNIT_ASSERT(onNewNodeCalls > initialOnNewNodeCalls);
-}
-
-void
-NetworkEngineTester::testIgnoresEmptyPartialData()
-{
-    Scheduler scheduler;
-    std::mt19937_64 rd(7);
-    InfoHash myid = InfoHash::getRandom(rd);
-    int onNewNodeCalls = 0;
-    auto engine = makeEngine(std::make_unique<TestDatagramSocket>(), scheduler, myid, rd, onNewNodeCalls);
-
-    auto packet = makeValueDataPacketBlob(100, 0, 0, {});
-    auto from = makeIPv4("127.0.0.2", 5007);
    engine.processMessage(packet.data(), packet.size(), from);

    CPPUNIT_ASSERT_EQUAL((size_t) 0, engine.getPartialCount());
    CPPUNIT_ASSERT_EQUAL(0, onNewNodeCalls);
 }

-void
-NetworkEngineTester::testRejectsUnsolicitedPartialReply()
-{
-    Scheduler scheduler;
-    std::mt19937_64 rd(9);
-    InfoHash myid = InfoHash::getRandom(rd);
-    InfoHash remoteId = InfoHash::getRandom(rd);
-    int onNewNodeCalls = 0;
-    auto engine = makeEngine(std::make_unique<TestDatagramSocket>(), scheduler, myid, rd, onNewNodeCalls);
-
-    auto from = makeIPv4("127.0.0.2", 5009);
-    auto header = makeReplyHeaderPacketBlob(remoteId, 102, {TEST_MTU});
-    engine.processMessage(header.data(), header.size(), from);
-
-    CPPUNIT_ASSERT_EQUAL((size_t) 0, engine.getPartialCount());
-    CPPUNIT_ASSERT_EQUAL((size_t) 0, engine.getNodeCacheSize());
-}
-
-void
-NetworkEngineTester::testDropsMalformedCompletedPartialMessage()
-{
-    Scheduler scheduler;
-    std::mt19937_64 rd(10);
-    InfoHash myid = InfoHash::getRandom(rd);
-    InfoHash remoteId = InfoHash::getRandom(rd);
-    int onNewNodeCalls = 0;
-    auto engine = makeEngine(std::make_unique<TestDatagramSocket>(), scheduler, myid, rd, onNewNodeCalls);
-
-    auto from = makeIPv4("127.0.0.2", 5010);
-    addPendingGetRequest(engine, remoteId, from, 103);
-    Blob malformed {0xc1};
-    auto header = makeReplyHeaderPacketBlob(remoteId, 103, {malformed.size()});
-    auto fragment = makeValueDataPacketBlob(103, 0, 0, malformed);
-
-    engine.processMessage(header.data(), header.size(), from);
-    CPPUNIT_ASSERT_EQUAL((size_t) 1, engine.getPartialCount());
-    engine.processMessage(fragment.data(), fragment.size(), from);
-
-    CPPUNIT_ASSERT_EQUAL((size_t) 0, engine.getPartialCount());
-
-    auto earlyFrom = makeIPv4("127.0.0.2", 5011);
-    addPendingGetRequest(engine, remoteId, earlyFrom, 104);
-    auto earlyHeader = makeReplyHeaderPacketBlob(remoteId, 104, {malformed.size()});
-    auto earlyFragment = makeValueDataPacketBlob(104, 0, 0, malformed);
-
-    engine.processMessage(earlyFragment.data(), earlyFragment.size(), earlyFrom);
-    CPPUNIT_ASSERT_EQUAL((size_t) 1, engine.getPartialCount());
-    engine.processMessage(earlyHeader.data(), earlyHeader.size(), earlyFrom);
-
-    CPPUNIT_ASSERT_EQUAL((size_t) 0, engine.getPartialCount());
-}
-
 void
 NetworkEngineTester::testCompletesPartialSessionFromSameSource()
 {
@@ -398,8 +274,6 @@ NetworkEngineTester::testCompletesPartialSessionFromSameSource()
    std::string data(TEST_MTU * 2 + 64, 'z');
    auto serialized = serializeValue(data);
    auto from = makeIPv4("127.0.0.2", 5001);
-    addPendingGetRequest(engine, remoteId, from, 7);
-    auto initialOnNewNodeCalls = onNewNodeCalls;
    auto header = makeReplyHeaderPacketBlob(remoteId, 7, {serialized.size()});

    engine.processMessage(header.data(), header.size(), from);
@@ -413,40 +287,45 @@ NetworkEngineTester::testCompletesPartialSessionFromSameSource()
    }

    CPPUNIT_ASSERT_EQUAL((size_t) 0, engine.getPartialCount());
-    CPPUNIT_ASSERT(onNewNodeCalls > initialOnNewNodeCalls);
+    CPPUNIT_ASSERT(onNewNodeCalls > 0);
 }

 void
-NetworkEngineTester::testSeparatesPartialSessionsBySource()
+NetworkEngineTester::testKeepsSessionForWrongSourceFragment()
 {
    Scheduler scheduler;
    std::mt19937_64 rd(2);
    InfoHash myid = InfoHash::getRandom(rd);
-    InfoHash firstRemoteId = InfoHash::getRandom(rd);
-    InfoHash secondRemoteId = InfoHash::getRandom(rd);
+    InfoHash remoteId = InfoHash::getRandom(rd);
    int onNewNodeCalls = 0;
    auto engine = makeEngine(std::make_unique<TestDatagramSocket>(), scheduler, myid, rd, onNewNodeCalls);

-    auto serialized = serializeValue("same transaction, different peers");
-    auto firstFrom = makeIPv4("127.0.0.2", 5002);
-    auto secondFrom = makeIPv4("127.0.0.3", 5002);
-    addPendingGetRequest(engine, firstRemoteId, firstFrom, 11);
-    addPendingGetRequest(engine, secondRemoteId, secondFrom, 11);
-    auto initialOnNewNodeCalls = onNewNodeCalls;
-    auto firstHeader = makeReplyHeaderPacketBlob(firstRemoteId, 11, {serialized.size()});
-    auto secondHeader = makeReplyHeaderPacketBlob(secondRemoteId, 11, {serialized.size()});
+    std::string data(TEST_MTU + 32, 'w');
+    auto serialized = serializeValue(data);
+    auto goodFrom = makeIPv4("127.0.0.2", 5002);
+    auto badFrom = makeIPv4("127.0.0.3", 5002);
+    auto header = makeReplyHeaderPacketBlob(remoteId, 11, {serialized.size()});

-    engine.processMessage(firstHeader.data(), firstHeader.size(), firstFrom);
-    engine.processMessage(secondHeader.data(), secondHeader.size(), secondFrom);
-    CPPUNIT_ASSERT_EQUAL((size_t) 2, engine.getPartialCount());
-
-    auto fragment = makeValueDataPacketBlob(11, 0, 0, serialized);
-    engine.processMessage(fragment.data(), fragment.size(), firstFrom);
+    engine.processMessage(header.data(), header.size(), goodFrom);
    CPPUNIT_ASSERT_EQUAL((size_t) 1, engine.getPartialCount());
-    engine.processMessage(fragment.data(), fragment.size(), secondFrom);
+
+    auto firstEnd = std::min(TEST_MTU, serialized.size());
+    Blob firstFragment(serialized.begin(), serialized.begin() + firstEnd);
+    auto firstPacket = makeValueDataPacketBlob(11, 0, 0, firstFragment);
+    engine.processMessage(firstPacket.data(), firstPacket.size(), badFrom);
+
+    CPPUNIT_ASSERT_EQUAL((size_t) 1, engine.getPartialCount());
+    CPPUNIT_ASSERT_EQUAL(0, onNewNodeCalls);
+
+    engine.processMessage(firstPacket.data(), firstPacket.size(), goodFrom);
+    if (firstEnd < serialized.size()) {
+        Blob tail(serialized.begin() + firstEnd, serialized.end());
+        auto tailPacket = makeValueDataPacketBlob(11, 0, firstEnd, tail);
+        engine.processMessage(tailPacket.data(), tailPacket.size(), goodFrom);
+    }

    CPPUNIT_ASSERT_EQUAL((size_t) 0, engine.getPartialCount());
-    CPPUNIT_ASSERT(onNewNodeCalls > initialOnNewNodeCalls);
+    CPPUNIT_ASSERT(onNewNodeCalls > 0);
 }

 void
@@ -13,13 +13,9 @@ class NetworkEngineTester : public CppUnit::TestFixture
 #ifdef _MSC_VER
    CPPUNIT_TEST(testDisabledOnMsvc);
 #else
-    CPPUNIT_TEST(testCompletesPartialSessionWithDataBeforeHeader);
-    CPPUNIT_TEST(testBuffersLargeValueBeforeHeader);
-    CPPUNIT_TEST(testIgnoresEmptyPartialData);
-    CPPUNIT_TEST(testRejectsUnsolicitedPartialReply);
-    CPPUNIT_TEST(testDropsMalformedCompletedPartialMessage);
+    CPPUNIT_TEST(testIgnoresUnknownPartialData);
    CPPUNIT_TEST(testCompletesPartialSessionFromSameSource);
-    CPPUNIT_TEST(testSeparatesPartialSessionsBySource);
+    CPPUNIT_TEST(testKeepsSessionForWrongSourceFragment);
    CPPUNIT_TEST(testListenConfirmationCarriesToken);
    CPPUNIT_TEST(testListenConfirmationUpdatesSearchNodeToken);
    CPPUNIT_TEST(testListenReopensSocketAfterNodeExpiration);
@@ -34,13 +30,9 @@ public:
 #ifdef _MSC_VER
    void testDisabledOnMsvc();
 #else
-    void testCompletesPartialSessionWithDataBeforeHeader();
-    void testBuffersLargeValueBeforeHeader();
-    void testIgnoresEmptyPartialData();
-    void testRejectsUnsolicitedPartialReply();
-    void testDropsMalformedCompletedPartialMessage();
+    void testIgnoresUnknownPartialData();
    void testCompletesPartialSessionFromSameSource();
-    void testSeparatesPartialSessionsBySource();
+    void testKeepsSessionForWrongSourceFragment();
    void testListenConfirmationCarriesToken();
    void testListenConfirmationUpdatesSearchNodeToken();
    void testListenReopensSocketAfterNodeExpiration();
@@ -328,104 +328,6 @@ ParsedMessageTester::testParseRejectsInvalidValuesField()
    CPPUNIT_ASSERT_THROW(parsed.msgpack_unpack(msg.get()), msgpack::type_error);
 }

-void
-ParsedMessageTester::testParseRejectsEmptyFieldSelection()
-{
-    msgpack::sbuffer buffer;
-    msgpack::packer<msgpack::sbuffer> pk(&buffer);
-
-    pk.pack_map(3);
-    pk.pack(KEY_R);
-    pk.pack_map(1);
-    pk.pack(KEY_REQ_FIELDS);
-    pk.pack_map(2);
-    pk.pack("f");
-    pk.pack_array(0);
-    pk.pack("v");
-    pk.pack_array(0);
-    pk.pack(KEY_TID);
-    pk.pack(1u);
-    pk.pack(KEY_Y);
-    pk.pack(KEY_R);
-
-    auto msg = msgpack::unpack(buffer.data(), buffer.size());
-    ParsedMessage parsed;
-    CPPUNIT_ASSERT_THROW(parsed.msgpack_unpack(msg.get()), msgpack::type_error);
-}
-
-void
-ParsedMessageTester::testParseRejectsEmptyErrorArray()
-{
-    msgpack::sbuffer buffer;
-    msgpack::packer<msgpack::sbuffer> pk(&buffer);
-
-    pk.pack_map(3);
-    pk.pack(KEY_E);
-    pk.pack_array(0);
-    pk.pack(KEY_TID);
-    pk.pack(1u);
-    pk.pack(KEY_Y);
-    pk.pack(KEY_E);
-
-    auto msg = msgpack::unpack(buffer.data(), buffer.size());
-    ParsedMessage parsed;
-    CPPUNIT_ASSERT_THROW(parsed.msgpack_unpack(msg.get()), msgpack::type_error);
-}
-
-void
-ParsedMessageTester::testParseRejectsNonMapRequest()
-{
-    msgpack::sbuffer buffer;
-    msgpack::packer<msgpack::sbuffer> pk(&buffer);
-
-    pk.pack_map(4);
-    pk.pack(KEY_A);
-    pk.pack_array(2);
-    pk.pack(1u);
-    pk.pack(2u);
-    pk.pack(KEY_Q);
-    pk.pack(QUERY_PING);
-    pk.pack(KEY_TID);
-    pk.pack(1u);
-    pk.pack(KEY_Y);
-    pk.pack("q");
-
-    auto msg = msgpack::unpack(buffer.data(), buffer.size());
-    ParsedMessage parsed;
-    CPPUNIT_ASSERT_THROW(parsed.msgpack_unpack(msg.get()), msgpack::type_error);
-}
-
-void
-ParsedMessageTester::testParseErrorOnlyMessageKeepsRequestFieldsEmpty()
-{
-    msgpack::sbuffer buffer;
-    msgpack::packer<msgpack::sbuffer> pk(&buffer);
-
-    // An error message with no request map: the error array must not be walked
-    // as if it were a sequence of key/value pairs.
-    pk.pack_map(3);
-    pk.pack(KEY_E);
-    pk.pack_array(2);
-    pk.pack(401u);
-    pk.pack("unauthorized");
-    pk.pack(KEY_TID);
-    pk.pack(9u);
-    pk.pack(KEY_Y);
-    pk.pack(KEY_E);
-
-    auto msg = msgpack::unpack(buffer.data(), buffer.size());
-    ParsedMessage parsed;
-    parsed.msgpack_unpack(msg.get());
-
-    CPPUNIT_ASSERT(parsed.type == MessageType::Error);
-    CPPUNIT_ASSERT_EQUAL((uint16_t) 401, parsed.error_code);
-    CPPUNIT_ASSERT(not parsed.id);
-    CPPUNIT_ASSERT(parsed.token.empty());
-    CPPUNIT_ASSERT(parsed.values.empty());
-    CPPUNIT_ASSERT(parsed.nodes4_raw.empty());
-    CPPUNIT_ASSERT(parsed.nodes6_raw.empty());
-}
-
 void
 ParsedMessageTester::testParseIgnoresIncompleteValueDataEntry()
 {
@@ -24,10 +24,6 @@ class ParsedMessageTester : public CppUnit::TestFixture
    CPPUNIT_TEST(testParseRejectsNonMapPacket);
    CPPUNIT_TEST(testParseRejectsInvalidValueDataPayload);
    CPPUNIT_TEST(testParseRejectsInvalidValuesField);
-    CPPUNIT_TEST(testParseRejectsEmptyFieldSelection);
-    CPPUNIT_TEST(testParseRejectsEmptyErrorArray);
-    CPPUNIT_TEST(testParseRejectsNonMapRequest);
-    CPPUNIT_TEST(testParseErrorOnlyMessageKeepsRequestFieldsEmpty);
    CPPUNIT_TEST(testParseIgnoresIncompleteValueDataEntry);
    CPPUNIT_TEST(testCompleteEmpty);
    CPPUNIT_TEST(testCompleteIncomplete);
@@ -57,10 +53,6 @@ public:
    void testParseRejectsNonMapPacket();
    void testParseRejectsInvalidValueDataPayload();
    void testParseRejectsInvalidValuesField();
-    void testParseRejectsEmptyFieldSelection();
-    void testParseRejectsEmptyErrorArray();
-    void testParseRejectsNonMapRequest();
-    void testParseErrorOnlyMessageKeepsRequestFieldsEmpty();
    void testParseIgnoresIncompleteValueDataEntry();
    void testCompleteEmpty();
    void testCompleteIncomplete();
@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: MIT

 #include "test_peerdiscovery.h"
+#include "opendht/value.h"

 #include <mutex>
 #include <condition_variable>
@@ -10,8 +11,24 @@ namespace test {

 using namespace std::literals;

-constexpr dht::NetId NETWORK_ID = 10;
-constexpr in_port_t NODE_PORT = 50000;
+constexpr unsigned MULTICAST_PORT = 2222;
+constexpr auto DHT_NODE_NAME {"dht"sv};
+constexpr auto JAMI_NODE_NAME {"jami"sv};
+
+struct DhtNode
+{
+    dht::InfoHash nodeid;
+    in_port_t node_port;
+    dht::NetId nid;
+    MSGPACK_DEFINE(nodeid, node_port, nid)
+};
+struct JamiNode
+{
+    int num;
+    char cha;
+    std::string str;
+    MSGPACK_DEFINE(num, cha, str)
+};

 CPPUNIT_TEST_SUITE_REGISTRATION(PeerDiscoveryTester);

@@ -22,40 +39,60 @@ PeerDiscoveryTester::setUp()
 void
 PeerDiscoveryTester::testMulticastToTwoNodes()
 {
-    const auto nodeId = dht::InfoHash::get("opendht01");
+    DhtNode dhtNode;
+    dhtNode.nid = 10;
+    dhtNode.node_port = 50000;
+    dhtNode.nodeid = dht::InfoHash::get("opendht01");
+
+    JamiNode jamiNode;
+    jamiNode.num = 100;
+    jamiNode.cha = 'a';
+    jamiNode.str = "jami01";

    std::mutex lock;
    std::condition_variable cv;
-    unsigned discovered {0};
-    unsigned wrongNetwork {0};
+    unsigned countDht {0};
+    unsigned countJami {0};
    {
        std::unique_lock l(lock);
-        dht::PeerDiscovery publisher;
-        dht::PeerDiscovery browser;
-        dht::PeerDiscovery otherNetworkBrowser;
+        dht::PeerDiscovery testDht(MULTICAST_PORT);
+        dht::PeerDiscovery testJami(MULTICAST_PORT);

-        browser.startDiscovery(NETWORK_ID, [&](const dht::InfoHash& peerId, dht::SockAddr&& address) {
-            CPPUNIT_ASSERT_EQUAL(nodeId, peerId);
-            CPPUNIT_ASSERT_EQUAL(NODE_PORT, address.getPort());
+        testJami.startDiscovery<DhtNode>(DHT_NODE_NAME, [&](DhtNode&& v, dht::SockAddr&&) {
+            CPPUNIT_ASSERT_EQUAL(dhtNode.node_port, v.node_port);
+            CPPUNIT_ASSERT_EQUAL(dhtNode.nodeid, v.nodeid);
+            CPPUNIT_ASSERT_EQUAL(dhtNode.nid, v.nid);
            {
                std::lock_guard l(lock);
-                discovered++;
+                countDht++;
            }
            cv.notify_all();
        });
-        otherNetworkBrowser.startDiscovery(NETWORK_ID + 1, [&](const dht::InfoHash&, dht::SockAddr&&) {
-            std::lock_guard l(lock);
-            wrongNetwork++;
+
+        testJami.startDiscovery(JAMI_NODE_NAME, [&](msgpack::object&& obj, dht::SockAddr&&) {
+            auto v = obj.as<JamiNode>();
+            CPPUNIT_ASSERT_EQUAL(jamiNode.num, v.num);
+            CPPUNIT_ASSERT_EQUAL(jamiNode.cha, v.cha);
+            CPPUNIT_ASSERT_EQUAL(jamiNode.str, v.str);
+            {
+                std::lock_guard l(lock);
+                countJami++;
+            }
+            cv.notify_all();
        });

-        publisher.startPublish(nodeId, NETWORK_ID, NODE_PORT);
-        CPPUNIT_ASSERT(cv.wait_for(l, std::chrono::seconds(5), [&] { return discovered > 0; }));
-        CPPUNIT_ASSERT_EQUAL(0u, wrongNetwork);
+        testDht.startPublish(DHT_NODE_NAME, dhtNode);
+        CPPUNIT_ASSERT(cv.wait_for(l, std::chrono::seconds(5), [&] { return countDht > 0; }));
+
+        testDht.startPublish(JAMI_NODE_NAME, jamiNode);
+        CPPUNIT_ASSERT(cv.wait_for(l, std::chrono::seconds(5), [&] { return countDht > 1 and countJami > 0; }));
+        // we don't verify count values since its a continious multicasting

        l.unlock();
-        publisher.stopPublish();
-        browser.stopDiscovery();
-        otherNetworkBrowser.stopDiscovery();
+        testDht.stopPublish(DHT_NODE_NAME);
+        testDht.stopPublish(JAMI_NODE_NAME);
+        testJami.stopDiscovery(DHT_NODE_NAME);
+        testJami.stopDiscovery(JAMI_NODE_NAME);
    }
 }

@@ -137,29 +137,4 @@ ValueTester::testPushTypePreservedAfterEncrypt()
    CPPUNIT_ASSERT(encrypted.isEncrypted());
 }

-void
-ValueTester::testPushTypeJsonRoundTrip()
-{
-#ifdef OPENDHT_JSONCPP
-    dht::Value original {(const uint8_t*) "hello", 5};
-    original.id = 42;
-    original.priority = 1;
-    original.pushType = "videoCall";
-
-    dht::Value restored(original.toJson());
-
-    CPPUNIT_ASSERT_EQUAL(original.id, restored.id);
-    CPPUNIT_ASSERT_EQUAL(original.priority, restored.priority);
-    CPPUNIT_ASSERT_EQUAL(original.pushType, restored.pushType);
-
-    // No pushType: the field must stay absent from the JSON and empty after parse.
-    dht::Value plain {(const uint8_t*) "data", 4};
-    plain.id = 7;
-    auto json = plain.toJson();
-    CPPUNIT_ASSERT(!json.isMember("pt"));
-    dht::Value plainRestored(json);
-    CPPUNIT_ASSERT_EQUAL(std::string(), plainRestored.pushType);
-#endif
-}
-
 } // namespace test
@@ -16,7 +16,6 @@ class ValueTester : public CppUnit::TestFixture
    CPPUNIT_TEST(testPushTypeMsgpackRoundTrip);
    CPPUNIT_TEST(testPushTypeAbsentAfterUnpack);
    CPPUNIT_TEST(testPushTypePreservedAfterEncrypt);
-    CPPUNIT_TEST(testPushTypeJsonRoundTrip);
    CPPUNIT_TEST_SUITE_END();

 public:
@@ -39,7 +38,6 @@ public:
    void testPushTypeMsgpackRoundTrip();
    void testPushTypeAbsentAfterUnpack();
    void testPushTypePreservedAfterEncrypt();
-    void testPushTypeJsonRoundTrip();
 };

 } // namespace test
@@ -1,7 +1,7 @@
 {
  "default-registry": {
    "kind": "git",
-    "baseline": "f3e10653cc27d62a37a3763cd84b38bca07c6075",
+    "baseline": "66c0373dc7fca549e5803087b9487edfe3aca0a1",
    "repository": "https://github.com/microsoft/vcpkg"
  },
  "registries": [
@@ -1,6 +1,6 @@
 {
  "name": "opendht",
-  "version-string": "4.3.0",
+  "version-string": "4.0.0",
  "port-version": 1,
  "description": "OpenDHT: A lightweight C++17 Distributed Hash Table library.",
  "homepage": "https://opendht.net",