| 1 | // Copyright (C) Microsoft Corporation. All rights reserved. |
| 2 | |
| 3 | #include <LxssDynamicFunction.h> |
| 4 | #include "precomp.h" |
| 5 | |
| 6 | #include <algorithm> |
| 7 | |
| 8 | #include <iphlpapi.h> |
| 9 | #include <ipifcons.h> |
| 10 | |
| 11 | #include "WmiService.h" |
| 12 | #include "WslCoreHostDnsInfo.h" |
| 13 | |
| 14 | static constexpr auto c_asciiNewLine = "\xa"; |
| 15 | |
| 16 | // Used for querying suffixes via WMI |
| 17 | static constexpr auto c_suffixSearchList = L"SuffixSearchList"; |
| 18 | static constexpr auto c_connectionSpecificSuffix = L"ConnectionSpecificSuffix"; |
| 19 | static constexpr auto c_connectionSpecificSuffixSearchList = L"ConnectionSpecificSuffixSearchList"; |
| 20 | static constexpr auto c_interfaceIndex = L"InterfaceIndex"; |
| 21 | |
| 22 | static constexpr auto c_ipHelperModuleName = L"Iphlpapi.dll"; |
| 23 | |
| 24 | static std::optional<LxssDynamicFunction<decltype(GetInterfaceDnsSettings)>> g_getInterfaceDnsSettings; |
| 25 | static std::optional<LxssDynamicFunction<decltype(FreeInterfaceDnsSettings)>> g_freeInterfaceDnsSettings; |
| 26 | |
| 27 | struct DnsRegistryPath |
| 28 | { |
| 29 | const wchar_t* registryPath; |
| 30 | const bool isRecursive; |
| 31 | }; |
| 32 | |
| 33 | // Registry paths that need to be monitored for DNS suffix changes |
| 34 | constexpr DnsRegistryPath c_dnsSuffixesRegistryPaths[] = { |
| 35 | {L"SYSTEM\\CurrentControlSet\\Services\\Dnscache\\InterfaceSpecificParameters", true}, |
| 36 | {L"SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces", true}, |
| 37 | {L"SYSTEM\\CurrentControlSet\\Services\\Tcpip6\\Parameters\\Interfaces", true}, |
| 38 | {L"SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters", false}, |
| 39 | {L"SYSTEM\\CurrentControlSet\\Services\\Tcpip6\\Parameters", false}, |
| 40 | {L"SOFTWARE\\Policies\\Microsoft\\Windows NT\\DNSClient", false}, |
| 41 | {L"SYSTEM\\CurrentControlSet\\Services\\Dnscache\\Parameters", false}}; |
| 42 | |
| 43 | // Load GetInterfaceDnsSettings and FreeInterfaceDnsSettings, if available |
| 44 | static bool LoadIpHelperMethods() noexcept |
| 45 | try |
| 46 | { |
| 47 | static wil::shared_hmodule ipHelperModule; |
| 48 | static std::once_flag loadFlag; |
| 49 | |
| 50 | std::call_once(loadFlag, [&]() { |
| 51 | ipHelperModule.reset(LoadLibraryEx(c_ipHelperModuleName, nullptr, LOAD_LIBRARY_SEARCH_SYSTEM32)); |
| 52 | RETURN_LAST_ERROR_IF_EXPECTED(!ipHelperModule); |
| 53 | |
| 54 | LxssDynamicFunction<decltype(GetInterfaceDnsSettings)> local_getInterfaceDnsSettings{DynamicFunctionErrorLogs::None}; |
| 55 | RETURN_IF_FAILED_EXPECTED(local_getInterfaceDnsSettings.load(ipHelperModule, "GetInterfaceDnsSettings")); |
| 56 | LxssDynamicFunction<decltype(FreeInterfaceDnsSettings)> local_freeInterfaceDnsSettings{DynamicFunctionErrorLogs::None}; |
| 57 | RETURN_IF_FAILED_EXPECTED(local_freeInterfaceDnsSettings.load(ipHelperModule, "FreeInterfaceDnsSettings")); |
| 58 | |
| 59 | g_getInterfaceDnsSettings.emplace(std::move(local_getInterfaceDnsSettings)); |
| 60 | g_freeInterfaceDnsSettings.emplace(std::move(local_freeInterfaceDnsSettings)); |
| 61 | return S_OK; |
| 62 | }); |
| 63 | |
| 64 | if (g_getInterfaceDnsSettings.has_value() && g_freeInterfaceDnsSettings.has_value()) |
| 65 | { |
| 66 | return true; |
| 67 | } |
| 68 | |
| 69 | WSL_LOG("LoadIpHelperMethods (false): GetInterfaceDnsSettings is not present"); |
| 70 | return false; |
| 71 | } |
| 72 | catch (...) |
| 73 | { |
| 74 | LOG_CAUGHT_EXCEPTION(); |
| 75 | return false; |
| 76 | } |
| 77 | |
| 78 | DWORD wsl::core::networking::GetBestInterface() |
| 79 | { |
| 80 | DWORD bestInterface = 0; |
| 81 | SOCKADDR_STORAGE address{}; |
| 82 | IN4ADDR_SETANY((SOCKADDR_IN*)&address); |
| 83 | if (GetBestInterfaceEx((SOCKADDR*)&address, &bestInterface) != NO_ERROR) |
| 84 | { |
| 85 | IN6ADDR_SETANY((SOCKADDR_IN6*)&address); |
| 86 | if (GetBestInterfaceEx((SOCKADDR*)&address, &bestInterface) != NO_ERROR) |
| 87 | { |
| 88 | bestInterface = 0; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | WSL_LOG("wsl::core::networking::GetBestInterface [GetBestInterfaceEx]", TraceLoggingValue(bestInterface, "bestInterface")); |
| 93 | |
| 94 | return bestInterface; |
| 95 | } |
| 96 | |
| 97 | wsl::core::networking::DnsInfo wsl::core::networking::HostDnsInfo::GetDnsTunnelingSettings(const std::wstring& dnsTunnelingNameserver) |
| 98 | { |
| 99 | DnsInfo dnsInfo; |
| 100 | dnsInfo.Servers.push_back(wsl::shared::string::WideToMultiByte(dnsTunnelingNameserver)); |
| 101 | |
| 102 | // All Windows DNS suffixes are configured in Linux when DNS tunneling is enabled |
| 103 | dnsInfo.Domains = GetAllDnsSuffixes(AdapterAddresses::GetCurrent()); |
| 104 | |
| 105 | return dnsInfo; |
| 106 | } |
| 107 | |
| 108 | std::vector<std::string> wsl::core::networking::HostDnsInfo::GetDnsServerStrings( |
| 109 | _In_ const PIP_ADAPTER_DNS_SERVER_ADDRESS& FirstDnsServer, _In_ USHORT IpFamilyFilter, _In_ USHORT MaxValues) |
| 110 | { |
| 111 | std::vector<std::string> DnsServerStrings; |
| 112 | CHAR IpBuffer[46]; |
| 113 | |
| 114 | PIP_ADAPTER_DNS_SERVER_ADDRESS DnsServer = FirstDnsServer; |
| 115 | while ((DnsServer != nullptr) && (DnsServerStrings.size() < MaxValues)) |
| 116 | { |
| 117 | PVOID IpAddress = nullptr; |
| 118 | const USHORT IpFamily = DnsServer->Address.lpSockaddr->sa_family; |
| 119 | if (IpFamily == AF_INET) |
| 120 | { |
| 121 | IpAddress = &((sockaddr_in*)DnsServer->Address.lpSockaddr)->sin_addr; |
| 122 | } |
| 123 | else if (IpFamily == AF_INET6) |
| 124 | { |
| 125 | IpAddress = &((sockaddr_in6*)DnsServer->Address.lpSockaddr)->sin6_addr; |
| 126 | } |
| 127 | |
| 128 | DnsServer = DnsServer->Next; |
| 129 | if (IpFamily != IpFamilyFilter) |
| 130 | { |
| 131 | continue; |
| 132 | } |
| 133 | |
| 134 | THROW_LAST_ERROR_IF_MSG( |
| 135 | (InetNtopA(IpFamily, IpAddress, IpBuffer, ARRAYSIZE(IpBuffer)) == NULL), "Failed to convert IP address"); |
| 136 | |
| 137 | DnsServerStrings.push_back(IpBuffer); |
| 138 | } |
| 139 | |
| 140 | return DnsServerStrings; |
| 141 | } |
| 142 | |
| 143 | std::vector<std::string> wsl::core::networking::HostDnsInfo::GetInterfaceDnsServers(const std::vector<IpAdapterAddress>& AdapterAddresses, _In_ DnsSettingsFlags Flags) |
| 144 | { |
| 145 | std::vector<std::string> DnsServers; |
| 146 | |
| 147 | constexpr size_t MaxResolvConfDnsServers = 3; |
| 148 | for (const IpAdapterAddress& NextAddress : AdapterAddresses) |
| 149 | { |
| 150 | WI_ASSERT(DnsServers.size() < MaxResolvConfDnsServers); |
| 151 | |
| 152 | USHORT MaxDnsServers = static_cast<USHORT>(MaxResolvConfDnsServers - DnsServers.size()); |
| 153 | |
| 154 | // Include only primary DNS VPN server. |
| 155 | if ((MaxDnsServers > 1) && (wsl::core::networking::IsInterfaceTypeVpn(NextAddress->IfType))) |
| 156 | { |
| 157 | MaxDnsServers = 1; |
| 158 | } |
| 159 | |
| 160 | // Add DNS nameservers from the interface, with the IPv4 addresses first. |
| 161 | std::vector<std::string> ipv4Servers = GetDnsServerStrings(NextAddress->FirstDnsServerAddress, AF_INET, MaxDnsServers); |
| 162 | DnsServers.insert(DnsServers.end(), ipv4Servers.begin(), ipv4Servers.end()); |
| 163 | |
| 164 | WI_ASSERT(DnsServers.size() <= MaxResolvConfDnsServers); |
| 165 | |
| 166 | if (WI_IsFlagSet(Flags, DnsSettingsFlags::IncludeIpv6Servers)) |
| 167 | { |
| 168 | std::vector<std::string> ipv6Servers = GetDnsServerStrings( |
| 169 | NextAddress->FirstDnsServerAddress, AF_INET6, static_cast<USHORT>(MaxResolvConfDnsServers - DnsServers.size())); |
| 170 | |
| 171 | DnsServers.insert(DnsServers.end(), ipv6Servers.begin(), ipv6Servers.end()); |
| 172 | } |
| 173 | |
| 174 | WI_ASSERT(DnsServers.size() <= MaxResolvConfDnsServers); |
| 175 | |
| 176 | // Only the first three nameserver entries are used. |
| 177 | if (DnsServers.size() >= MaxResolvConfDnsServers) |
| 178 | { |
| 179 | break; |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | return DnsServers; |
| 184 | } |
| 185 | |
| 186 | std::vector<std::string> wsl::core::networking::HostDnsInfo::GetInterfaceDnsSuffixes(const std::vector<IpAdapterAddress>& AdapterAddresses) |
| 187 | { |
| 188 | std::vector<std::string> DnsSuffixes; |
| 189 | std::set<std::wstring> UniqueDnsSuffixes; |
| 190 | |
| 191 | PIP_ADAPTER_DNS_SUFFIX DnsSuffix; |
| 192 | |
| 193 | auto AppendSuffix = [&](const std::wstring& NewSuffix) { |
| 194 | if (NewSuffix.empty()) |
| 195 | { |
| 196 | return; |
| 197 | } |
| 198 | |
| 199 | if (std::ranges::find_if(UniqueDnsSuffixes, [&](const std::wstring& Suffix) { |
| 200 | return wsl::shared::string::IsEqual(Suffix, NewSuffix, true); |
| 201 | }) == UniqueDnsSuffixes.end()) |
| 202 | { |
| 203 | DnsSuffixes.emplace_back(wsl::shared::string::WideToMultiByte(NewSuffix)); |
| 204 | UniqueDnsSuffixes.insert(NewSuffix); |
| 205 | } |
| 206 | }; |
| 207 | |
| 208 | for (const IpAdapterAddress& NextAddress : AdapterAddresses) |
| 209 | { |
| 210 | // Add any domain suffix information from the interface. |
| 211 | if ((NextAddress->DnsSuffix != nullptr) && (wcslen(NextAddress->DnsSuffix) > 0)) |
| 212 | { |
| 213 | AppendSuffix(NextAddress->DnsSuffix); |
| 214 | } |
| 215 | |
| 216 | DnsSuffix = NextAddress->FirstDnsSuffix; |
| 217 | while (DnsSuffix != nullptr) |
| 218 | { |
| 219 | AppendSuffix(DnsSuffix->String); |
| 220 | |
| 221 | DnsSuffix = DnsSuffix->Next; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | return DnsSuffixes; |
| 226 | } |
| 227 | |
| 228 | wsl::core::networking::DnsInfo wsl::core::networking::HostDnsInfo::GetDnsSettings(_In_ DnsSettingsFlags Flags) |
| 229 | { |
| 230 | std::vector<IpAdapterAddress> Addresses = AdapterAddresses::GetCurrent(); |
| 231 | |
| 232 | auto RemoveFilter = [&](const IpAdapterAddress& Address) { |
| 233 | // Ignore interfaces that are not currently "up". |
| 234 | // Ignore loopback and tunneling interfaces. |
| 235 | // Ignore interfaces that have no IP address or no DNS addresses. |
| 236 | // Ignore hidden interfaces |
| 237 | if ((Address->OperStatus != IfOperStatusUp) || (Address->IfType == IF_TYPE_SOFTWARE_LOOPBACK) || (Address->IfType == IF_TYPE_TUNNEL) || |
| 238 | (!WI_IsFlagSet(Flags, DnsSettingsFlags::IncludeVpn) && wsl::core::networking::IsInterfaceTypeVpn(Address->IfType)) || |
| 239 | (Address->FirstUnicastAddress == nullptr) || (Address->FirstDnsServerAddress == nullptr) || IsInterfaceHidden(Address->IfIndex)) |
| 240 | { |
| 241 | return true; |
| 242 | } |
| 243 | return false; |
| 244 | }; |
| 245 | |
| 246 | std::erase_if(Addresses, RemoveFilter); |
| 247 | |
| 248 | // Find the recommended internet interface if one exists. |
| 249 | // First try VPN interface, then regular IPv4 and then IPv6. |
| 250 | const auto BestInterface = GetBestInterface(); |
| 251 | |
| 252 | // Sort the remaining network interfaces, with the most preferable at index 0. |
| 253 | std::sort(Addresses.begin(), Addresses.end(), [&](const IpAdapterAddress& First, const IpAdapterAddress& Second) { |
| 254 | // VPN interface takes precedence. |
| 255 | const bool FirstIsVpn = wsl::core::networking::IsInterfaceTypeVpn(First->IfType); |
| 256 | const bool SecondIsVpn = wsl::core::networking::IsInterfaceTypeVpn(Second->IfType); |
| 257 | if (FirstIsVpn ^ SecondIsVpn) |
| 258 | { |
| 259 | // Give precedence to the first VPN interface. |
| 260 | return FirstIsVpn; |
| 261 | } |
| 262 | |
| 263 | // The identified 'best' internet connection interface should go right |
| 264 | // after VPN. Or if both networking interfaces are VPN interfaces, |
| 265 | // give preference to the one considered 'best'. |
| 266 | if (First->IfIndex == BestInterface) |
| 267 | { |
| 268 | return true; |
| 269 | } |
| 270 | if (Second->IfIndex == BestInterface) |
| 271 | { |
| 272 | return false; |
| 273 | } |
| 274 | |
| 275 | // Check the first interface for IPv4 DNS servers. |
| 276 | bool FirstHasIpv4 = false; |
| 277 | auto DnsServer = First->FirstDnsServerAddress; |
| 278 | while (DnsServer != nullptr) |
| 279 | { |
| 280 | const USHORT IpFamily = DnsServer->Address.lpSockaddr->sa_family; |
| 281 | DnsServer = DnsServer->Next; |
| 282 | if (IpFamily == AF_INET) |
| 283 | { |
| 284 | FirstHasIpv4 = true; |
| 285 | break; |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | // Check the second interface for IPv4 DNS servers. |
| 290 | bool SecondHasIpv4 = false; |
| 291 | DnsServer = Second->FirstDnsServerAddress; |
| 292 | while (DnsServer != nullptr) |
| 293 | { |
| 294 | const USHORT IpFamily = DnsServer->Address.lpSockaddr->sa_family; |
| 295 | DnsServer = DnsServer->Next; |
| 296 | if (IpFamily == AF_INET) |
| 297 | { |
| 298 | SecondHasIpv4 = true; |
| 299 | break; |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | // Give precedence to interfaces that have IPv4 DNS servers; otherwise, give precedence to the lower interface index. |
| 304 | return (FirstHasIpv4 ^ SecondHasIpv4) ? FirstHasIpv4 : (First->IfIndex < Second->IfIndex); |
| 305 | }); |
| 306 | |
| 307 | DnsInfo DnsSettings{}; |
| 308 | |
| 309 | DnsSettings.Servers = GetInterfaceDnsServers(Addresses, Flags); |
| 310 | |
| 311 | if (WI_IsFlagSet(Flags, DnsSettingsFlags::IncludeAllSuffixes)) |
| 312 | { |
| 313 | DnsSettings.Domains = GetAllDnsSuffixes(Addresses); |
| 314 | } |
| 315 | else |
| 316 | { |
| 317 | DnsSettings.Domains = GetInterfaceDnsSuffixes(Addresses); |
| 318 | } |
| 319 | |
| 320 | return DnsSettings; |
| 321 | } |
| 322 | |
| 323 | std::string wsl::core::networking::GenerateResolvConf(_In_ const DnsInfo& Info) |
| 324 | { |
| 325 | std::string contents{}; |
| 326 | if (!Info.Servers.empty()) |
| 327 | { |
| 328 | // Add IP addresses of the DNS name servers. |
| 329 | for (const std::string& ip : Info.Servers) |
| 330 | { |
| 331 | contents += "nameserver "; |
| 332 | contents += ip; |
| 333 | contents += c_asciiNewLine; |
| 334 | } |
| 335 | |
| 336 | // Add DNS suffix information using 'search' directive. |
| 337 | // Per resolv.conf(5): "The domain directive is an obsolete name for the search directive |
| 338 | // that handles one search list entry only." |
| 339 | // See: https://man7.org/linux/man-pages/man5/resolv.conf.5.html |
| 340 | if (!Info.Domains.empty()) |
| 341 | { |
| 342 | contents += "search "; |
| 343 | std::for_each(Info.Domains.begin(), (Info.Domains.end() - 1), [&contents](const std::string& NextDomain) { |
| 344 | contents += NextDomain; |
| 345 | contents += " "; |
| 346 | }); |
| 347 | |
| 348 | contents += Info.Domains.back(); |
| 349 | contents += c_asciiNewLine; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | WSL_LOG("wsl::core::networking::GenerateResolvConf", TraceLoggingValue(contents.c_str(), "resolvConf")); |
| 354 | |
| 355 | return contents; |
| 356 | } |
| 357 | |
| 358 | std::vector<std::string> wsl::core::networking::GetAllDnsSuffixes(const std::vector<IpAdapterAddress>& AdapterAddresses) |
| 359 | { |
| 360 | const auto com = InitializeCOMState(); |
| 361 | wsl::core::WmiService service(L"ROOT\\StandardCimv2"); |
| 362 | |
| 363 | // DNS suffixes will be configured in Linux in the following order, *similar* (not 100% the same) to the order in which Windows tries suffixes. |
| 364 | // |
| 365 | // 1) Global suffixes (can be configured manually or via group policy) - queried using WMI call equivalent with Get-DnsClientGlobalSetting |
| 366 | // 2) Supplemental search list, queried using GetInterfaceDnsSettings() |
| 367 | // 3) Per-interface suffixes, queried using WMI call equivalent with Get-DnsClient |
| 368 | std::vector<std::string> dnsSuffixes; |
| 369 | std::set<std::wstring> uniqueDnsSuffixes; |
| 370 | |
| 371 | auto AppendSuffix = [&](const std::wstring& newSuffix) { |
| 372 | if (newSuffix.empty()) |
| 373 | { |
| 374 | return; |
| 375 | } |
| 376 | |
| 377 | if (std::ranges::find_if(uniqueDnsSuffixes, [&](const std::wstring& suffix) { |
| 378 | return wsl::shared::string::IsEqual(suffix, newSuffix, true); |
| 379 | }) == uniqueDnsSuffixes.end()) |
| 380 | { |
| 381 | dnsSuffixes.emplace_back(wsl::shared::string::WideToMultiByte(newSuffix)); |
| 382 | uniqueDnsSuffixes.insert(newSuffix); |
| 383 | } |
| 384 | }; |
| 385 | |
| 386 | // 1) Query global suffixes |
| 387 | wsl::core::WmiEnumerate enumDnsClientGlobalSetting(service); |
| 388 | |
| 389 | for (const auto& instance : enumDnsClientGlobalSetting.query(L"SELECT * FROM MSFT_DnsClientGlobalSetting")) |
| 390 | { |
| 391 | std::vector<std::wstring> suffixSearchList; |
| 392 | |
| 393 | instance.get(c_suffixSearchList, &suffixSearchList); |
| 394 | |
| 395 | for (const auto& suffix : suffixSearchList) |
| 396 | { |
| 397 | AppendSuffix(suffix); |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | // 2) Query supplemental search list. Skip this step if the OS does not support the required APIs |
| 402 | if (LoadIpHelperMethods()) |
| 403 | { |
| 404 | for (const auto& address : AdapterAddresses) |
| 405 | { |
| 406 | if (IsInterfaceHidden(address->IfIndex)) |
| 407 | { |
| 408 | continue; |
| 409 | } |
| 410 | |
| 411 | GUID interfaceGuid{}; |
| 412 | if (FAILED_WIN32_LOG(ConvertInterfaceLuidToGuid(&address->Luid, &interfaceGuid))) |
| 413 | { |
| 414 | continue; |
| 415 | } |
| 416 | |
| 417 | DNS_INTERFACE_SETTINGS_EX settings{}; |
| 418 | settings.SettingsV1.Version = DNS_INTERFACE_SETTINGS_VERSION2; |
| 419 | settings.SettingsV1.Flags = DNS_SETTING_SUPPLEMENTAL_SEARCH_LIST; |
| 420 | |
| 421 | if (FAILED_WIN32_LOG(g_getInterfaceDnsSettings.value()(interfaceGuid, reinterpret_cast<DNS_INTERFACE_SETTINGS*>(&settings)))) |
| 422 | { |
| 423 | continue; |
| 424 | } |
| 425 | |
| 426 | const auto freeSettings = |
| 427 | wil::scope_exit([&] { g_freeInterfaceDnsSettings.value()(reinterpret_cast<DNS_INTERFACE_SETTINGS*>(&settings)); }); |
| 428 | |
| 429 | if (settings.SupplementalSearchList != nullptr) |
| 430 | { |
| 431 | // The suffix list can be delimited by comma, space, tab |
| 432 | std::wstring separators = L", \t"; |
| 433 | |
| 434 | for (const auto& suffix : |
| 435 | wsl::shared::string::SplitByMultipleSeparators(std::wstring{settings.SupplementalSearchList}, separators)) |
| 436 | { |
| 437 | AppendSuffix(suffix); |
| 438 | } |
| 439 | } |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | // 3) Query per-interface suffixes |
| 444 | wsl::core::WmiEnumerate enumDnsClient(service); |
| 445 | |
| 446 | for (const auto& instance : enumDnsClient.query(L"SELECT * FROM MSFT_DnsClient")) |
| 447 | { |
| 448 | std::wstring connectionSuffix; |
| 449 | std::vector<std::wstring> connectionSuffixSearchList; |
| 450 | IF_INDEX interfaceIndex{}; |
| 451 | |
| 452 | instance.get(c_interfaceIndex, &interfaceIndex); |
| 453 | if (IsInterfaceHidden(interfaceIndex)) |
| 454 | { |
| 455 | continue; |
| 456 | } |
| 457 | |
| 458 | instance.get(c_connectionSpecificSuffix, &connectionSuffix); |
| 459 | instance.get(c_connectionSpecificSuffixSearchList, &connectionSuffixSearchList); |
| 460 | |
| 461 | AppendSuffix(connectionSuffix); |
| 462 | |
| 463 | for (const auto& suffix : connectionSuffixSearchList) |
| 464 | { |
| 465 | AppendSuffix(suffix); |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | return dnsSuffixes; |
| 470 | } |
| 471 | |
| 472 | wsl::core::networking::DnsSuffixRegistryWatcher::DnsSuffixRegistryWatcher(RegistryChangeCallback&& reportRegistryChange) : |
| 473 | m_reportRegistryChange(std::move(reportRegistryChange)) |
| 474 | { |
| 475 | std::vector<wistd::unique_ptr<wsl::windows::common::slim_registry_watcher>> localRegistryWatchers; |
| 476 | |
| 477 | for (const auto& path : c_dnsSuffixesRegistryPaths) |
| 478 | { |
| 479 | auto watcher = wil::make_unique_nothrow<wsl::windows::common::slim_registry_watcher>(); |
| 480 | THROW_HR_IF(E_OUTOFMEMORY, !watcher); |
| 481 | |
| 482 | THROW_IF_FAILED(watcher->create(HKEY_LOCAL_MACHINE, path.registryPath, path.isRecursive, [this](wil::RegistryChangeKind changeKind) { |
| 483 | m_reportRegistryChange(); |
| 484 | })); |
| 485 | localRegistryWatchers.emplace_back(std::move(watcher)); |
| 486 | } |
| 487 | |
| 488 | m_registryWatchers.swap(localRegistryWatchers); |
| 489 | } |
| 490 | |
| 491 | wsl::shared::hns::DNS wsl::core::networking::BuildDnsNotification(const DnsInfo& settings, PCWSTR options) |
| 492 | { |
| 493 | wsl::shared::hns::DNS dnsNotification{}; |
| 494 | if (options) |
| 495 | { |
| 496 | dnsNotification.Options = options; |
| 497 | } |
| 498 | |
| 499 | dnsNotification.ServerList = wsl::shared::string::MultiByteToWide(wsl::shared::string::Join(settings.Servers, ',')); |
| 500 | |
| 501 | // Use 'search' entry for DNS suffix list. |
| 502 | // Per resolv.conf(5): "The domain directive is an obsolete name for the search directive |
| 503 | // that handles one search list entry only." |
| 504 | // See: https://man7.org/linux/man-pages/man5/resolv.conf.5.html |
| 505 | dnsNotification.Search = wsl::shared::string::MultiByteToWide(wsl::shared::string::Join(settings.Domains, ',')); |
| 506 | |
| 507 | return dnsNotification; |
| 508 | } |