| 1 | // Copyright (C) Microsoft Corporation. All rights reserved. |
| 2 | #include "common.h" |
| 3 | #include <memory> |
| 4 | #include <string> |
| 5 | #include <string_view> |
| 6 | #include <vector> |
| 7 | #include <iostream> |
| 8 | |
| 9 | #include <libgen.h> |
| 10 | #include <sys/epoll.h> |
| 11 | #include <sys/socket.h> |
| 12 | #include <netinet/ip.h> |
| 13 | #include <sys/syscall.h> |
| 14 | #include <linux/unistd.h> |
| 15 | #include <linux/sock_diag.h> |
| 16 | #include <linux/inet_diag.h> |
| 17 | #include <lxwil.h> |
| 18 | #include <linux/if_tun.h> |
| 19 | |
| 20 | #include "util.h" |
| 21 | #include "SocketChannel.h" |
| 22 | #include "GnsPortTracker.h" |
| 23 | #include "SecCompDispatcher.h" |
| 24 | #include "seccomp_defs.h" |
| 25 | #include "CommandLine.h" |
| 26 | #include "NetlinkChannel.h" |
| 27 | #include "NetlinkTransactionError.h" |
| 28 | |
| 29 | #define TCP_LISTEN 10 |
| 30 | |
| 31 | namespace { |
| 32 | |
| 33 | std::vector<sockaddr_storage> QueryListeningSockets(NetlinkChannel& channel) |
| 34 | { |
| 35 | std::vector<sockaddr_storage> sockets{}; |
| 36 | try |
| 37 | { |
| 38 | inet_diag_req_v2 message{}; |
| 39 | message.sdiag_protocol = IPPROTO_TCP; |
| 40 | message.idiag_states = (1 << TCP_LISTEN); |
| 41 | |
| 42 | auto onMessage = [&](const NetlinkResponse& response) { |
| 43 | for (const auto& e : response.Messages<inet_diag_msg>(SOCK_DIAG_BY_FAMILY)) |
| 44 | { |
| 45 | const auto* payload = e.Payload(); |
| 46 | sockaddr_storage sock{}; |
| 47 | |
| 48 | if (payload->idiag_family == AF_INET) |
| 49 | { |
| 50 | auto* ipv4 = reinterpret_cast<sockaddr_in*>(&sock); |
| 51 | ipv4->sin_family = AF_INET; |
| 52 | ipv4->sin_addr.s_addr = payload->id.idiag_src[0]; |
| 53 | ipv4->sin_port = payload->id.idiag_sport; |
| 54 | } |
| 55 | else if (payload->idiag_family == AF_INET6) |
| 56 | { |
| 57 | auto* ipv6 = reinterpret_cast<sockaddr_in6*>(&sock); |
| 58 | ipv6->sin6_family = AF_INET6; |
| 59 | static_assert(sizeof(ipv6->sin6_addr.s6_addr32) == sizeof(payload->id.idiag_src)); |
| 60 | memcpy(ipv6->sin6_addr.s6_addr32, payload->id.idiag_src, sizeof(ipv6->sin6_addr.s6_addr32)); |
| 61 | ipv6->sin6_port = payload->id.idiag_sport; |
| 62 | } |
| 63 | |
| 64 | sockets.emplace_back(sock); |
| 65 | } |
| 66 | }; |
| 67 | |
| 68 | // Query IPv4 listening sockets. |
| 69 | { |
| 70 | message.sdiag_family = AF_INET; |
| 71 | auto transaction = channel.CreateTransaction(message, SOCK_DIAG_BY_FAMILY, NLM_F_DUMP); |
| 72 | transaction.Execute(onMessage); |
| 73 | } |
| 74 | |
| 75 | // Query IPv6 listening sockets. |
| 76 | { |
| 77 | message.sdiag_family = AF_INET6; |
| 78 | auto transaction = channel.CreateTransaction(message, SOCK_DIAG_BY_FAMILY, NLM_F_DUMP); |
| 79 | transaction.Execute(onMessage); |
| 80 | } |
| 81 | } |
| 82 | catch (const NetlinkTransactionError& e) |
| 83 | { |
| 84 | // Log but don't fail - network state might be temporarily unavailable |
| 85 | LOG_ERROR("Failed to query listening sockets via sock_diag: {}", e.what()); |
| 86 | } |
| 87 | |
| 88 | return sockets; |
| 89 | } |
| 90 | |
| 91 | int SendRelayListenerSocket(wsl::shared::SocketChannel& channel, int hvSocketPort) |
| 92 | try |
| 93 | { |
| 94 | LX_GNS_SET_PORT_LISTENER message{}; |
| 95 | message.Header.MessageType = LxGnsMessageSetPortListener; |
| 96 | message.Header.MessageSize = sizeof(message); |
| 97 | message.HvSocketPort = hvSocketPort; |
| 98 | |
| 99 | channel.SendMessage(message); |
| 100 | |
| 101 | return 0; |
| 102 | } |
| 103 | CATCH_RETURN_ERRNO(); |
| 104 | |
| 105 | LX_GNS_PORT_LISTENER_RELAY SockToRelayMessage(const sockaddr_storage& sock) |
| 106 | { |
| 107 | LX_GNS_PORT_LISTENER_RELAY message{}; |
| 108 | message.Header.MessageSize = sizeof(message); |
| 109 | message.Family = sock.ss_family; |
| 110 | if (sock.ss_family == AF_INET) |
| 111 | { |
| 112 | auto ipv4 = reinterpret_cast<const sockaddr_in*>(&sock); |
| 113 | message.Address[0] = ipv4->sin_addr.s_addr; |
| 114 | message.Port = ntohs(ipv4->sin_port); |
| 115 | } |
| 116 | else if (sock.ss_family == AF_INET6) |
| 117 | { |
| 118 | auto ipv6 = reinterpret_cast<const sockaddr_in6*>(&sock); |
| 119 | message.Port = ntohs(ipv6->sin6_port); |
| 120 | memcpy(message.Address, ipv6->sin6_addr.__in6_union.__s6_addr, sizeof(message.Address)); |
| 121 | } |
| 122 | return message; |
| 123 | } |
| 124 | |
| 125 | int StartHostListener(wsl::shared::SocketChannel& channel, const sockaddr_storage& sock) |
| 126 | try |
| 127 | { |
| 128 | auto message = SockToRelayMessage(sock); |
| 129 | message.Header.MessageType = LxGnsMessagePortListenerRelayStart; |
| 130 | auto transaction = channel.StartTransaction(); |
| 131 | transaction.Send(message); |
| 132 | |
| 133 | return 0; |
| 134 | } |
| 135 | CATCH_RETURN_ERRNO(); |
| 136 | |
| 137 | int StopHostListener(wsl::shared::SocketChannel& channel, const sockaddr_storage& sock) |
| 138 | try |
| 139 | { |
| 140 | auto message = SockToRelayMessage(sock); |
| 141 | message.Header.MessageType = LxGnsMessagePortListenerRelayStop; |
| 142 | auto transaction = channel.StartTransaction(); |
| 143 | transaction.Send(message); |
| 144 | |
| 145 | return 0; |
| 146 | } |
| 147 | CATCH_RETURN_ERRNO(); |
| 148 | |
| 149 | bool IsSameSockAddr(const sockaddr_storage& left, const sockaddr_storage& right) |
| 150 | { |
| 151 | if (left.ss_family != right.ss_family) |
| 152 | { |
| 153 | return false; |
| 154 | } |
| 155 | |
| 156 | if (left.ss_family == AF_INET) |
| 157 | { |
| 158 | auto leftIpv4 = reinterpret_cast<const sockaddr_in*>(&left); |
| 159 | auto rightIpv4 = reinterpret_cast<const sockaddr_in*>(&right); |
| 160 | return (leftIpv4->sin_addr.s_addr == rightIpv4->sin_addr.s_addr && leftIpv4->sin_port == rightIpv4->sin_port); |
| 161 | } |
| 162 | else if (left.ss_family == AF_INET6) |
| 163 | { |
| 164 | auto leftIpv6 = reinterpret_cast<const sockaddr_in6*>(&left); |
| 165 | auto rightIpv6 = reinterpret_cast<const sockaddr_in6*>(&right); |
| 166 | return (leftIpv6->sin6_port == rightIpv6->sin6_port && memcmp(&leftIpv6->sin6_addr, &rightIpv6->sin6_addr, sizeof(in6_addr)) == 0); |
| 167 | } |
| 168 | |
| 169 | FATAL_ERROR("Unrecognized socket family {}", left.ss_family); |
| 170 | return false; |
| 171 | } |
| 172 | |
| 173 | // Monitor listening TCP sockets using sock_diag netlink interface. |
| 174 | int MonitorListeningSockets(wsl::shared::SocketChannel& channel) |
| 175 | { |
| 176 | NetlinkChannel netlinkChannel(SOCK_RAW, NETLINK_SOCK_DIAG); |
| 177 | std::vector<sockaddr_storage> relays{}; |
| 178 | int result = 0; |
| 179 | |
| 180 | for (;;) |
| 181 | { |
| 182 | auto sockets = QueryListeningSockets(netlinkChannel); |
| 183 | |
| 184 | // Stop any relays that no longer match listening ports. |
| 185 | std::erase_if(relays, [&](const auto& entry) { |
| 186 | auto found = |
| 187 | std::find_if(sockets.begin(), sockets.end(), [&](const auto& socket) { return IsSameSockAddr(entry, socket); }); |
| 188 | |
| 189 | bool remove = (found == sockets.end()); |
| 190 | if (remove) |
| 191 | { |
| 192 | if (StopHostListener(channel, entry) < 0) |
| 193 | { |
| 194 | result = -1; |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | return remove; |
| 199 | }); |
| 200 | |
| 201 | // Create relays for any new ports. |
| 202 | std::for_each(sockets.begin(), sockets.end(), [&](const auto& socket) { |
| 203 | auto found = |
| 204 | std::find_if(relays.begin(), relays.end(), [&](const auto& entry) { return IsSameSockAddr(entry, socket); }); |
| 205 | |
| 206 | if (found == relays.end()) |
| 207 | { |
| 208 | if (StartHostListener(channel, socket) < 0) |
| 209 | { |
| 210 | result = -1; |
| 211 | } |
| 212 | else |
| 213 | { |
| 214 | relays.push_back(socket); |
| 215 | } |
| 216 | } |
| 217 | }); |
| 218 | |
| 219 | // Ensure all start / stop operations were successful. |
| 220 | if (result < 0) |
| 221 | { |
| 222 | break; |
| 223 | } |
| 224 | |
| 225 | // Sleep before scanning again. |
| 226 | std::this_thread::sleep_for(std::chrono::seconds(1)); |
| 227 | } |
| 228 | |
| 229 | return result; |
| 230 | } |
| 231 | } // namespace |
| 232 | |
| 233 | void RunLocalHostRelay(sockaddr_vm hvSocketAddress, int listenSocket) |
| 234 | { |
| 235 | pollfd pollDescriptors[] = {{listenSocket, POLLIN}}; |
| 236 | for (;;) |
| 237 | { |
| 238 | int result = poll(pollDescriptors, COUNT_OF(pollDescriptors), -1); |
| 239 | if (result < 0) |
| 240 | { |
| 241 | LOG_ERROR("poll failed {}", errno); |
| 242 | return; |
| 243 | } |
| 244 | |
| 245 | if ((pollDescriptors[0].revents & POLLIN) == 0) |
| 246 | { |
| 247 | LOG_ERROR("unexpected revents {:x}", pollDescriptors[0].revents); |
| 248 | return; |
| 249 | } |
| 250 | |
| 251 | // Accept a connection and start a relay worker thread. |
| 252 | wil::unique_fd relaySocket{UtilAcceptVsock(listenSocket, hvSocketAddress)}; |
| 253 | THROW_LAST_ERROR_IF(!relaySocket); |
| 254 | |
| 255 | std::thread([relaySocket = std::move(relaySocket)]() { |
| 256 | try |
| 257 | { |
| 258 | // Read a message to determine which TCP port to connect to. |
| 259 | std::vector<gsl::byte> buffer(sizeof(LX_INIT_START_SOCKET_RELAY)); |
| 260 | auto bytesRead = UtilReadBuffer(relaySocket.get(), buffer); |
| 261 | if (bytesRead == 0) |
| 262 | { |
| 263 | return; |
| 264 | } |
| 265 | |
| 266 | auto* message = gslhelpers::try_get_struct<LX_INIT_START_SOCKET_RELAY>(gsl::make_span(buffer.data(), bytesRead)); |
| 267 | THROW_ERRNO_IF(EINVAL, !message || (message->Header.MessageType != LxInitMessageStartSocketRelay)); |
| 268 | |
| 269 | // Connect to the actual socket address and set up a relay. |
| 270 | // |
| 271 | // N.B. During the time setting up the relay the server may have |
| 272 | // stopped listening. |
| 273 | sockaddr* socketAddress; |
| 274 | int socketAddressSize; |
| 275 | sockaddr_in sockaddrIn{}; |
| 276 | sockaddr_in6 sockaddrIn6{}; |
| 277 | |
| 278 | if (message->Family == AF_INET) |
| 279 | { |
| 280 | sockaddrIn.sin_family = AF_INET; |
| 281 | sockaddrIn.sin_port = htons(message->Port); |
| 282 | sockaddrIn.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 283 | socketAddress = reinterpret_cast<sockaddr*>(&sockaddrIn); |
| 284 | socketAddressSize = sizeof(sockaddrIn); |
| 285 | } |
| 286 | else if (message->Family == AF_INET6) |
| 287 | { |
| 288 | sockaddrIn6.sin6_family = AF_INET6; |
| 289 | sockaddrIn6.sin6_port = htons(message->Port); |
| 290 | sockaddrIn6.sin6_addr = IN6ADDR_LOOPBACK_INIT; |
| 291 | socketAddress = reinterpret_cast<sockaddr*>(&sockaddrIn6); |
| 292 | socketAddressSize = sizeof(sockaddrIn6); |
| 293 | } |
| 294 | else |
| 295 | { |
| 296 | THROW_ERRNO(EINVAL); |
| 297 | } |
| 298 | |
| 299 | wil::unique_fd tcpSocket{socket(socketAddress->sa_family, SOCK_STREAM, IPPROTO_TCP)}; |
| 300 | THROW_LAST_ERROR_IF(!tcpSocket); |
| 301 | |
| 302 | if (TEMP_FAILURE_RETRY(connect(tcpSocket.get(), socketAddress, socketAddressSize)) < 0) |
| 303 | { |
| 304 | LOG_ERROR("Failed to connect to port: {}, family: {}, errno: {}", message->Port, message->Family, errno); |
| 305 | return; |
| 306 | } |
| 307 | |
| 308 | // Resize the buffer to be the requested size. |
| 309 | buffer.resize(message->BufferSize); |
| 310 | |
| 311 | // Begin relaying data. |
| 312 | int outFd[2] = {tcpSocket.get(), relaySocket.get()}; |
| 313 | pollfd pollDescriptors[] = {{relaySocket.get(), POLLIN}, {tcpSocket.get(), POLLIN}}; |
| 314 | |
| 315 | for (;;) |
| 316 | { |
| 317 | if ((pollDescriptors[0].fd == -1) || (pollDescriptors[1].fd == -1)) |
| 318 | { |
| 319 | return; |
| 320 | } |
| 321 | |
| 322 | THROW_LAST_ERROR_IF(poll(pollDescriptors, COUNT_OF(pollDescriptors), -1) < 0); |
| 323 | |
| 324 | bytesRead = 0; |
| 325 | for (int Index = 0; Index < COUNT_OF(pollDescriptors); Index += 1) |
| 326 | { |
| 327 | if (pollDescriptors[Index].revents & POLLIN) |
| 328 | { |
| 329 | bytesRead = UtilReadBuffer(pollDescriptors[Index].fd, buffer); |
| 330 | if (bytesRead == 0) |
| 331 | { |
| 332 | pollDescriptors[Index].fd = -1; |
| 333 | shutdown(outFd[Index], SHUT_WR); |
| 334 | } |
| 335 | else if (bytesRead < 0) |
| 336 | { |
| 337 | return; |
| 338 | } |
| 339 | else if (UtilWriteBuffer(outFd[Index], buffer.data(), bytesRead) < 0) |
| 340 | { |
| 341 | return; |
| 342 | } |
| 343 | } |
| 344 | } |
| 345 | } |
| 346 | } |
| 347 | CATCH_LOG() |
| 348 | }).detach(); |
| 349 | } |
| 350 | |
| 351 | return; |
| 352 | } |
| 353 | |
| 354 | // Create a thread to monitor for connections to relay. |
| 355 | int StartLocalhostRelay(wsl::shared::SocketChannel& channel, int GuestRelayFd, bool ScanForPorts) |
| 356 | try |
| 357 | { |
| 358 | // If the other end of a socket is reset, write will result in EPIPE. Ignore |
| 359 | // this signal and just use the write return value. |
| 360 | THROW_LAST_ERROR_IF(signal(SIGPIPE, SIG_IGN) == SIG_ERR); |
| 361 | |
| 362 | sockaddr_vm hvSocketAddress = {}; |
| 363 | socklen_t hvSocketAddressLen = sizeof(hvSocketAddress); |
| 364 | if (getsockname(GuestRelayFd, reinterpret_cast<sockaddr*>(&hvSocketAddress), &hvSocketAddressLen) < 0 || |
| 365 | hvSocketAddressLen != sizeof(hvSocketAddress)) |
| 366 | { |
| 367 | LOG_ERROR("Failed to get hvsocket port: {}, {}", errno, hvSocketAddressLen); |
| 368 | return -1; |
| 369 | } |
| 370 | |
| 371 | wil::unique_fd listenSocket{GuestRelayFd}; |
| 372 | THROW_LAST_ERROR_IF(!listenSocket); |
| 373 | |
| 374 | // Create a thread to accept incoming connections from the host listener |
| 375 | std::thread([hvSocketAddress, listenSocket = std::move(listenSocket)]() { |
| 376 | try |
| 377 | { |
| 378 | RunLocalHostRelay(hvSocketAddress, listenSocket.get()); |
| 379 | } |
| 380 | CATCH_LOG() |
| 381 | }).detach(); |
| 382 | |
| 383 | if (SendRelayListenerSocket(channel, hvSocketAddress.svm_port) < 0) |
| 384 | { |
| 385 | LOG_ERROR("Unable to send relay listener socket"); |
| 386 | return -1; |
| 387 | } |
| 388 | |
| 389 | if (ScanForPorts) |
| 390 | { |
| 391 | return MonitorListeningSockets(channel); |
| 392 | } |
| 393 | |
| 394 | return 0; |
| 395 | } |
| 396 | catch (...) |
| 397 | { |
| 398 | LOG_CAUGHT_EXCEPTION_MSG("Could not start localhost relay.") |
| 399 | return -1; |
| 400 | } |
| 401 | |
| 402 | int RunPortTracker(int Argc, char** Argv) |
| 403 | { |
| 404 | using namespace wsl::shared; |
| 405 | |
| 406 | constexpr auto* Usage = "Usage: localhost " INIT_PORT_TRACKER_FD_ARG |
| 407 | " fd" |
| 408 | " [" INIT_BPF_FD_ARG |
| 409 | " fd]" |
| 410 | " [" INIT_NETLINK_FD_ARG |
| 411 | " fd]" |
| 412 | " [" INIT_PORT_TRACKER_LOCALHOST_RELAY |
| 413 | " fd]" |
| 414 | " [" INIT_PORT_TRACKER_NETWORKING_MODE_ARG " mode]\n"; |
| 415 | |
| 416 | // This is only supported on VM mode. |
| 417 | if (!UtilIsUtilityVm()) |
| 418 | { |
| 419 | return -1; |
| 420 | } |
| 421 | |
| 422 | // Initialize error and telemetry logging. |
| 423 | InitializeLogging(true); |
| 424 | |
| 425 | int BpfFd = -1; |
| 426 | int PortTrackerFd = -1; |
| 427 | int NetlinkSocketFd = -1; |
| 428 | int GuestRelayFd = -1; |
| 429 | int NetworkingMode = static_cast<int>(LxMiniInitNetworkingModeNone); |
| 430 | |
| 431 | ArgumentParser parser(Argc, Argv); |
| 432 | parser.AddArgument(Integer{BpfFd}, INIT_BPF_FD_ARG); |
| 433 | parser.AddArgument(Integer{PortTrackerFd}, INIT_PORT_TRACKER_FD_ARG); |
| 434 | parser.AddArgument(Integer{NetlinkSocketFd}, INIT_NETLINK_FD_ARG); |
| 435 | parser.AddArgument(Integer{GuestRelayFd}, INIT_PORT_TRACKER_LOCALHOST_RELAY); |
| 436 | parser.AddArgument(Integer{NetworkingMode}, INIT_PORT_TRACKER_NETWORKING_MODE_ARG); |
| 437 | |
| 438 | try |
| 439 | { |
| 440 | parser.Parse(); |
| 441 | } |
| 442 | catch (const wil::ExceptionWithUserMessage& e) |
| 443 | { |
| 444 | std::cerr << e.what() << "\n" << Usage; |
| 445 | return 1; |
| 446 | } |
| 447 | |
| 448 | if (NetworkingMode < LxMiniInitNetworkingModeNone || NetworkingMode > LxMiniInitNetworkingModeConsomme) |
| 449 | { |
| 450 | std::cerr << "Invalid networking mode (" << NetworkingMode << ")\n"; |
| 451 | return 1; |
| 452 | } |
| 453 | |
| 454 | const bool synchronousMode = BpfFd != -1 && NetlinkSocketFd != -1; |
| 455 | const bool localhostRelay = GuestRelayFd != -1; |
| 456 | auto hvSocketChannel = std::make_shared<wsl::shared::SocketChannel>(wil::unique_fd{PortTrackerFd}, "localhost"); |
| 457 | |
| 458 | if (localhostRelay) |
| 459 | { |
| 460 | // This needs to be the first message sent over the PortTrackerFd channel, |
| 461 | // before running the seccomp dispatcher loop. |
| 462 | const int ret = StartLocalhostRelay(*hvSocketChannel, GuestRelayFd, !synchronousMode); |
| 463 | if (ret < 0) |
| 464 | { |
| 465 | LOG_ERROR("Failed to start the guest side of the localhost relay"); |
| 466 | } |
| 467 | if (!synchronousMode) |
| 468 | { |
| 469 | return ret; |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | if (!synchronousMode) |
| 474 | { |
| 475 | std::cerr << "either both or none of --bpf-fd and --netlink-socket can be passed\n"; |
| 476 | return 1; |
| 477 | } |
| 478 | |
| 479 | auto channel = NetlinkChannel::FromFd(NetlinkSocketFd); |
| 480 | |
| 481 | auto seccompDispatcher = std::make_shared<SecCompDispatcher>(BpfFd); |
| 482 | |
| 483 | GnsPortTracker portTracker(hvSocketChannel, std::move(channel), seccompDispatcher, static_cast<LX_MINI_INIT_NETWORKING_MODE>(NetworkingMode)); |
| 484 | |
| 485 | seccompDispatcher->RegisterHandler( |
| 486 | __NR_bind, [&portTracker](seccomp_notif* notification) { return portTracker.ProcessSecCompNotification(notification); }); |
| 487 | |
| 488 | // listen() can perform an implicit autobind (assigning an ephemeral port) when called on a |
| 489 | // socket that was never explicitly bind()'d. That autobind is otherwise invisible to the |
| 490 | // port tracker, so listen() needs to be intercepted the same way bind() is. |
| 491 | seccompDispatcher->RegisterHandler( |
| 492 | __NR_listen, [&portTracker](seccomp_notif* notification) { return portTracker.ProcessSecCompNotification(notification); }); |
| 493 | |
| 494 | #ifdef __x86_64__ |
| 495 | seccompDispatcher->RegisterHandler(I386_NR_socketcall, [&portTracker](seccomp_notif* notification) { |
| 496 | return portTracker.ProcessSecCompNotification(notification); |
| 497 | }); |
| 498 | #else |
| 499 | seccompDispatcher->RegisterHandler(ARMV7_NR_bind, [&portTracker](seccomp_notif* notification) { |
| 500 | return portTracker.ProcessSecCompNotification(notification); |
| 501 | }); |
| 502 | seccompDispatcher->RegisterHandler(ARMV7_NR_listen, [&portTracker](seccomp_notif* notification) { |
| 503 | return portTracker.ProcessSecCompNotification(notification); |
| 504 | }); |
| 505 | #endif |
| 506 | |
| 507 | seccompDispatcher->RegisterHandler(__NR_ioctl, [hvSocketChannel, seccompDispatcher](auto notification) -> int { |
| 508 | LX_GNS_TUN_BRIDGE_REQUEST request{}; |
| 509 | request.Header.MessageType = LxGnsMessageIfStateChangeRequest; |
| 510 | request.Header.MessageSize = sizeof(request); |
| 511 | auto ifreqMemory = |
| 512 | seccompDispatcher->ReadProcessMemory(notification->id, notification->pid, notification->data.args[2], sizeof(ifreq)); |
| 513 | if (!ifreqMemory.has_value()) |
| 514 | { |
| 515 | return -1; |
| 516 | } |
| 517 | |
| 518 | auto& ifRequest = *reinterpret_cast<ifreq*>(ifreqMemory->data()); |
| 519 | memcpy(request.InterfaceName, ifRequest.ifr_ifrn.ifrn_name, sizeof(request.InterfaceName)); |
| 520 | request.InterfaceUp = ifRequest.ifr_ifru.ifru_flags & IFF_UP; |
| 521 | const auto& reply = hvSocketChannel->Transaction(request); |
| 522 | |
| 523 | return reply.Result; |
| 524 | }); |
| 525 | |
| 526 | try |
| 527 | { |
| 528 | portTracker.Run(); |
| 529 | } |
| 530 | catch (const std::exception& e) |
| 531 | { |
| 532 | std::cerr << "Port tracker exiting with fatal error, " << e.what() << std::endl; |
| 533 | } |
| 534 | |
| 535 | return 1; |
| 536 | } |