DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (b6d82b1a6b02)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471
/* vim:set ts=2 sw=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/Attributes.h"
#include "mozilla/EndianUtils.h"
#include "mozilla/dom/TypedArray.h"
#include "mozilla/HoldDropJSObjects.h"
#include "mozilla/Telemetry.h"

#include "nsSocketTransport2.h"
#include "nsUDPSocket.h"
#include "nsProxyRelease.h"
#include "nsAutoPtr.h"
#include "nsError.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsIOService.h"
#include "prnetdb.h"
#include "prio.h"
#include "nsNetAddr.h"
#include "nsNetSegmentUtils.h"
#include "IOActivityMonitor.h"
#include "nsServiceManagerUtils.h"
#include "nsStreamUtils.h"
#include "nsIPipe.h"
#include "prerror.h"
#include "nsThreadUtils.h"
#include "nsIDNSRecord.h"
#include "nsIDNSService.h"
#include "nsICancelable.h"
#include "nsWrapperCacheInlines.h"

namespace mozilla {
namespace net {

static const uint32_t UDP_PACKET_CHUNK_SIZE = 1400;

//-----------------------------------------------------------------------------

typedef void (nsUDPSocket::*nsUDPSocketFunc)(void);

static nsresult PostEvent(nsUDPSocket* s, nsUDPSocketFunc func) {
  if (!gSocketTransportService) return NS_ERROR_FAILURE;

  return gSocketTransportService->Dispatch(
      NewRunnableMethod("net::PostEvent", s, func), NS_DISPATCH_NORMAL);
}

static nsresult ResolveHost(const nsACString& host,
                            const OriginAttributes& aOriginAttributes,
                            nsIDNSListener* listener) {
  nsresult rv;

  nsCOMPtr<nsIDNSService> dns =
      do_GetService("@mozilla.org/network/dns-service;1", &rv);
  if (NS_FAILED(rv)) {
    return rv;
  }

  nsCOMPtr<nsICancelable> tmpOutstanding;
  return dns->AsyncResolveNative(host, 0, listener, nullptr, aOriginAttributes,
                                 getter_AddRefs(tmpOutstanding));
}

static nsresult CheckIOStatus(const NetAddr* aAddr) {
  MOZ_ASSERT(gIOService);

  if (gIOService->IsNetTearingDown()) {
    return NS_ERROR_FAILURE;
  }

  if (gIOService->IsOffline() && !IsLoopBackAddress(aAddr)) {
    return NS_ERROR_OFFLINE;
  }

  return NS_OK;
}

//-----------------------------------------------------------------------------

class SetSocketOptionRunnable : public Runnable {
 public:
  SetSocketOptionRunnable(nsUDPSocket* aSocket, const PRSocketOptionData& aOpt)
      : Runnable("net::SetSocketOptionRunnable"),
        mSocket(aSocket),
        mOpt(aOpt) {}

  NS_IMETHOD Run() override { return mSocket->SetSocketOption(mOpt); }

 private:
  RefPtr<nsUDPSocket> mSocket;
  PRSocketOptionData mOpt;
};

//-----------------------------------------------------------------------------
// nsUDPOutputStream impl
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS(nsUDPOutputStream, nsIOutputStream)

nsUDPOutputStream::nsUDPOutputStream(nsUDPSocket* aSocket, PRFileDesc* aFD,
                                     PRNetAddr& aPrClientAddr)
    : mSocket(aSocket),
      mFD(aFD),
      mPrClientAddr(aPrClientAddr),
      mIsClosed(false) {}

NS_IMETHODIMP nsUDPOutputStream::Close() {
  if (mIsClosed) return NS_BASE_STREAM_CLOSED;

  mIsClosed = true;
  return NS_OK;
}

NS_IMETHODIMP nsUDPOutputStream::Flush() { return NS_OK; }

NS_IMETHODIMP nsUDPOutputStream::Write(const char* aBuf, uint32_t aCount,
                                       uint32_t* _retval) {
  if (mIsClosed) return NS_BASE_STREAM_CLOSED;

  *_retval = 0;
  int32_t count =
      PR_SendTo(mFD, aBuf, aCount, 0, &mPrClientAddr, PR_INTERVAL_NO_WAIT);
  if (count < 0) {
    PRErrorCode code = PR_GetError();
    return ErrorAccordingToNSPR(code);
  }

  *_retval = count;

  mSocket->AddOutputBytes(count);

  return NS_OK;
}

NS_IMETHODIMP nsUDPOutputStream::WriteFrom(nsIInputStream* aFromStream,
                                           uint32_t aCount, uint32_t* _retval) {
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP nsUDPOutputStream::WriteSegments(nsReadSegmentFun aReader,
                                               void* aClosure, uint32_t aCount,
                                               uint32_t* _retval) {
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP nsUDPOutputStream::IsNonBlocking(bool* _retval) {
  *_retval = true;
  return NS_OK;
}

//-----------------------------------------------------------------------------
// nsUDPMessage impl
//-----------------------------------------------------------------------------
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsUDPMessage)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsUDPMessage)

NS_IMPL_CYCLE_COLLECTION_CLASS(nsUDPMessage)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsUDPMessage)
  NS_INTERFACE_MAP_ENTRY(nsISupports)
  NS_INTERFACE_MAP_ENTRY(nsIUDPMessage)
NS_INTERFACE_MAP_END

NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsUDPMessage)
  NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mJsobj)
NS_IMPL_CYCLE_COLLECTION_TRACE_END

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsUDPMessage)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsUDPMessage)
  tmp->mJsobj = nullptr;
NS_IMPL_CYCLE_COLLECTION_UNLINK_END

nsUDPMessage::nsUDPMessage(NetAddr* aAddr, nsIOutputStream* aOutputStream,
                           FallibleTArray<uint8_t>& aData)
    : mOutputStream(aOutputStream) {
  memcpy(&mAddr, aAddr, sizeof(NetAddr));
  aData.SwapElements(mData);
}

nsUDPMessage::~nsUDPMessage() { DropJSObjects(this); }

NS_IMETHODIMP
nsUDPMessage::GetFromAddr(nsINetAddr** aFromAddr) {
  NS_ENSURE_ARG_POINTER(aFromAddr);

  nsCOMPtr<nsINetAddr> result = new nsNetAddr(&mAddr);
  result.forget(aFromAddr);

  return NS_OK;
}

NS_IMETHODIMP
nsUDPMessage::GetData(nsACString& aData) {
  aData.Assign(reinterpret_cast<const char*>(mData.Elements()), mData.Length());
  return NS_OK;
}

NS_IMETHODIMP
nsUDPMessage::GetOutputStream(nsIOutputStream** aOutputStream) {
  NS_ENSURE_ARG_POINTER(aOutputStream);
  NS_IF_ADDREF(*aOutputStream = mOutputStream);
  return NS_OK;
}

NS_IMETHODIMP
nsUDPMessage::GetRawData(JSContext* cx, JS::MutableHandleValue aRawData) {
  if (!mJsobj) {
    mJsobj =
        dom::Uint8Array::Create(cx, nullptr, mData.Length(), mData.Elements());
    HoldJSObjects(this);
  }
  aRawData.setObject(*mJsobj);
  return NS_OK;
}

FallibleTArray<uint8_t>& nsUDPMessage::GetDataAsTArray() { return mData; }

//-----------------------------------------------------------------------------
// nsUDPSocket
//-----------------------------------------------------------------------------

nsUDPSocket::nsUDPSocket()
    : mLock("nsUDPSocket.mLock"),
      mFD(nullptr),
      mOriginAttributes(),
      mAttached(false),
      mByteReadCount(0),
      mByteWriteCount(0) {
  this->mAddr.inet = {};
  mAddr.raw.family = PR_AF_UNSPEC;
  // we want to be able to access the STS directly, and it may not have been
  // constructed yet.  the STS constructor sets gSocketTransportService.
  if (!gSocketTransportService) {
    // This call can fail if we're offline, for example.
    nsCOMPtr<nsISocketTransportService> sts =
        do_GetService(NS_SOCKETTRANSPORTSERVICE_CONTRACTID);
  }

  mSts = gSocketTransportService;
}

nsUDPSocket::~nsUDPSocket() { CloseSocket(); }

void nsUDPSocket::AddOutputBytes(uint64_t aBytes) { mByteWriteCount += aBytes; }

void nsUDPSocket::OnMsgClose() {
  UDPSOCKET_LOG(("nsUDPSocket::OnMsgClose [this=%p]\n", this));

  if (NS_FAILED(mCondition)) return;

  // tear down socket.  this signals the STS to detach our socket handler.
  mCondition = NS_BINDING_ABORTED;

  // if we are attached, then socket transport service will call our
  // OnSocketDetached method automatically. Otherwise, we have to call it
  // (and thus close the socket) manually.
  if (!mAttached) OnSocketDetached(mFD);
}

void nsUDPSocket::OnMsgAttach() {
  UDPSOCKET_LOG(("nsUDPSocket::OnMsgAttach [this=%p]\n", this));

  if (NS_FAILED(mCondition)) return;

  mCondition = TryAttach();

  // if we hit an error while trying to attach then bail...
  if (NS_FAILED(mCondition)) {
    UDPSOCKET_LOG(("nsUDPSocket::OnMsgAttach: TryAttach FAILED err=0x%" PRIx32
                   " [this=%p]\n",
                   static_cast<uint32_t>(mCondition), this));
    NS_ASSERTION(!mAttached, "should not be attached already");
    OnSocketDetached(mFD);
  }
}

nsresult nsUDPSocket::TryAttach() {
  nsresult rv;

  if (!gSocketTransportService) return NS_ERROR_FAILURE;

  rv = CheckIOStatus(&mAddr);
  if (NS_FAILED(rv)) {
    return rv;
  }

  //
  // find out if it is going to be ok to attach another socket to the STS.
  // if not then we have to wait for the STS to tell us that it is ok.
  // the notification is asynchronous, which means that when we could be
  // in a race to call AttachSocket once notified.  for this reason, when
  // we get notified, we just re-enter this function.  as a result, we are
  // sure to ask again before calling AttachSocket.  in this way we deal
  // with the race condition.  though it isn't the most elegant solution,
  // it is far simpler than trying to build a system that would guarantee
  // FIFO ordering (which wouldn't even be that valuable IMO).  see bug
  // 194402 for more info.
  //
  if (!gSocketTransportService->CanAttachSocket()) {
    nsCOMPtr<nsIRunnable> event = NewRunnableMethod(
        "net::nsUDPSocket::OnMsgAttach", this, &nsUDPSocket::OnMsgAttach);

    nsresult rv = gSocketTransportService->NotifyWhenCanAttachSocket(event);
    if (NS_FAILED(rv)) return rv;
  }

  //
  // ok, we can now attach our socket to the STS for polling
  //
  rv = gSocketTransportService->AttachSocket(mFD, this);
  if (NS_FAILED(rv)) return rv;

  mAttached = true;

  //
  // now, configure our poll flags for listening...
  //
  mPollFlags = (PR_POLL_READ | PR_POLL_EXCEPT);
  return NS_OK;
}

namespace {
//-----------------------------------------------------------------------------
// UDPMessageProxy
//-----------------------------------------------------------------------------
class UDPMessageProxy final : public nsIUDPMessage {
 public:
  UDPMessageProxy(NetAddr* aAddr, nsIOutputStream* aOutputStream,
                  FallibleTArray<uint8_t>& aData)
      : mOutputStream(aOutputStream) {
    memcpy(&mAddr, aAddr, sizeof(mAddr));
    aData.SwapElements(mData);
  }

  NS_DECL_THREADSAFE_ISUPPORTS
  NS_DECL_NSIUDPMESSAGE

 private:
  ~UDPMessageProxy() = default;

  NetAddr mAddr;
  nsCOMPtr<nsIOutputStream> mOutputStream;
  FallibleTArray<uint8_t> mData;
};

NS_IMPL_ISUPPORTS(UDPMessageProxy, nsIUDPMessage)

NS_IMETHODIMP
UDPMessageProxy::GetFromAddr(nsINetAddr** aFromAddr) {
  NS_ENSURE_ARG_POINTER(aFromAddr);

  nsCOMPtr<nsINetAddr> result = new nsNetAddr(&mAddr);
  result.forget(aFromAddr);

  return NS_OK;
}

NS_IMETHODIMP
UDPMessageProxy::GetData(nsACString& aData) {
  aData.Assign(reinterpret_cast<const char*>(mData.Elements()), mData.Length());
  return NS_OK;
}

FallibleTArray<uint8_t>& UDPMessageProxy::GetDataAsTArray() { return mData; }

NS_IMETHODIMP
UDPMessageProxy::GetRawData(JSContext* cx, JS::MutableHandleValue aRawData) {
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
UDPMessageProxy::GetOutputStream(nsIOutputStream** aOutputStream) {
  NS_ENSURE_ARG_POINTER(aOutputStream);
  NS_IF_ADDREF(*aOutputStream = mOutputStream);
  return NS_OK;
}

}  // anonymous namespace

//-----------------------------------------------------------------------------
// nsUDPSocket::nsASocketHandler
//-----------------------------------------------------------------------------

void nsUDPSocket::OnSocketReady(PRFileDesc* fd, int16_t outFlags) {
  UDPSOCKET_LOG(
      ("nsUDPSocket::OnSocketReady: flags=%d [this=%p]\n", outFlags, this));
  NS_ASSERTION(NS_SUCCEEDED(mCondition), "oops");
  NS_ASSERTION(mFD == fd, "wrong file descriptor");
  NS_ASSERTION(outFlags != -1, "unexpected timeout condition reached");

  if (outFlags & (PR_POLL_HUP | PR_POLL_NVAL)) {
    NS_WARNING("error polling on listening socket");
    mCondition = NS_ERROR_UNEXPECTED;
    return;
  }

  PRNetAddr prClientAddr;
  int32_t count;
  // Bug 1252755 - use 9216 bytes to allign with nICEr and transportlayer to
  // support the maximum size of jumbo frames
  char buff[9216];
  count = PR_RecvFrom(mFD, buff, sizeof(buff), 0, &prClientAddr,
                      PR_INTERVAL_NO_WAIT);
  if (count < 0) {
    UDPSOCKET_LOG(
        ("nsUDPSocket::OnSocketReady: PR_RecvFrom failed [this=%p]\n", this));
    return;
  }
  mByteReadCount += count;

  FallibleTArray<uint8_t> data;
  if (!data.AppendElements(buff, count, fallible)) {
    UDPSOCKET_LOG((
        "nsUDPSocket::OnSocketReady: AppendElements FAILED [this=%p]\n", this));
    mCondition = NS_ERROR_UNEXPECTED;
    return;
  }

  nsCOMPtr<nsIAsyncInputStream> pipeIn;
  nsCOMPtr<nsIAsyncOutputStream> pipeOut;

  uint32_t segsize = UDP_PACKET_CHUNK_SIZE;
  uint32_t segcount = 0;
  net_ResolveSegmentParams(segsize, segcount);
  nsresult rv = NS_NewPipe2(getter_AddRefs(pipeIn), getter_AddRefs(pipeOut),
                            true, true, segsize, segcount);

  if (NS_FAILED(rv)) {
    return;
  }

  RefPtr<nsUDPOutputStream> os = new nsUDPOutputStream(this, mFD, prClientAddr);
  rv = NS_AsyncCopy(pipeIn, os, mSts, NS_ASYNCCOPY_VIA_READSEGMENTS,
                    UDP_PACKET_CHUNK_SIZE);

  if (NS_FAILED(rv)) {
    return;
  }

  NetAddr netAddr;
  PRNetAddrToNetAddr(&prClientAddr, &netAddr);
  nsCOMPtr<nsIUDPMessage> message =
      new UDPMessageProxy(&netAddr, pipeOut, data);
  mListener->OnPacketReceived(this, message);
}

void nsUDPSocket::OnSocketDetached(PRFileDesc* fd) {
  UDPSOCKET_LOG(("nsUDPSocket::OnSocketDetached [this=%p]\n", this));
  // force a failure condition if none set; maybe the STS is shutting down :-/
  if (NS_SUCCEEDED(mCondition)) mCondition = NS_ERROR_ABORT;

  if (mFD) {
    NS_ASSERTION(mFD == fd, "wrong file descriptor");
    CloseSocket();
  }

  if (mListener) {
    // need to atomically clear mListener.  see our Close() method.
    RefPtr<nsIUDPSocketListener> listener = nullptr;
    {
      MutexAutoLock lock(mLock);
      listener = mListener.forget();
    }

    if (listener) {
      listener->OnStopListening(this, mCondition);
      NS_ProxyRelease("nsUDPSocket::mListener", mListenerTarget,
                      listener.forget());
    }
  }
}

void nsUDPSocket::IsLocal(bool* aIsLocal) {
  // If bound to loopback, this UDP socket only accepts local connections.
  *aIsLocal = IsLoopBackAddress(&mAddr);
}

//-----------------------------------------------------------------------------
// nsSocket::nsISupports
//-----------------------------------------------------------------------------

NS_IMPL_ISUPPORTS(nsUDPSocket, nsIUDPSocket)

//-----------------------------------------------------------------------------
// nsSocket::nsISocket
//-----------------------------------------------------------------------------

NS_IMETHODIMP
nsUDPSocket::Init(int32_t aPort, bool aLoopbackOnly, nsIPrincipal* aPrincipal,
                  bool aAddressReuse, uint8_t aOptionalArgc) {
  NetAddr addr;

  if (aPort < 0) aPort = 0;

  addr.raw.family = AF_INET;
  addr.inet.port = htons(aPort);

  if (aLoopbackOnly)
    addr.inet.ip = htonl(INADDR_LOOPBACK);
  else
    addr.inet.ip = htonl(INADDR_ANY);

  return InitWithAddress(&addr, aPrincipal, aAddressReuse, aOptionalArgc);
}

NS_IMETHODIMP
nsUDPSocket::Init2(const nsACString& aAddr, int32_t aPort,
                   nsIPrincipal* aPrincipal, bool aAddressReuse,
                   uint8_t aOptionalArgc) {
  if (NS_WARN_IF(aAddr.IsEmpty())) {
    return NS_ERROR_INVALID_ARG;
  }

  PRNetAddr prAddr;
  memset(&prAddr, 0, sizeof(prAddr));
  if (PR_StringToNetAddr(aAddr.BeginReading(), &prAddr) != PR_SUCCESS) {
    return NS_ERROR_FAILURE;
  }

  if (aPort < 0) {
    aPort = 0;
  }

  switch (prAddr.raw.family) {
    case PR_AF_INET:
      prAddr.inet.port = PR_htons(aPort);
      break;
    case PR_AF_INET6:
      prAddr.ipv6.port = PR_htons(aPort);
      break;
    default:
      MOZ_ASSERT_UNREACHABLE("Dont accept address other than IPv4 and IPv6");
      return NS_ERROR_ILLEGAL_VALUE;
  }

  NetAddr addr;
  PRNetAddrToNetAddr(&prAddr, &addr);

  return InitWithAddress(&addr, aPrincipal, aAddressReuse, aOptionalArgc);
}

NS_IMETHODIMP
nsUDPSocket::InitWithAddress(const NetAddr* aAddr, nsIPrincipal* aPrincipal,
                             bool aAddressReuse, uint8_t aOptionalArgc) {
  NS_ENSURE_TRUE(mFD == nullptr, NS_ERROR_ALREADY_INITIALIZED);

  nsresult rv;

  rv = CheckIOStatus(aAddr);
  if (NS_FAILED(rv)) {
    return rv;
  }

  bool addressReuse = (aOptionalArgc == 1) ? aAddressReuse : true;

  if (aPrincipal) {
    mOriginAttributes = aPrincipal->OriginAttributesRef();
  }
  //
  // configure listening socket...
  //

  mFD = PR_OpenUDPSocket(aAddr->raw.family);
  if (!mFD) {
    NS_WARNING("unable to create UDP socket");
    return NS_ERROR_FAILURE;
  }

  uint16_t port;
  if (NS_FAILED(net::GetPort(aAddr, &port))) {
    NS_WARNING("invalid bind address");
    goto fail;
  }

  PRSocketOptionData opt;

  // Linux kernel will sometimes hand out a used port if we bind
  // to port 0 with SO_REUSEADDR
  if (port) {
    opt.option = PR_SockOpt_Reuseaddr;
    opt.value.reuse_addr = addressReuse;
    PR_SetSocketOption(mFD, &opt);
  }

  opt.option = PR_SockOpt_Nonblocking;
  opt.value.non_blocking = true;
  PR_SetSocketOption(mFD, &opt);

  PRNetAddr addr;
  // Temporary work around for IPv6 until bug 1330490 is fixed
  memset(&addr, 0, sizeof(addr));
  NetAddrToPRNetAddr(aAddr, &addr);

  if (PR_Bind(mFD, &addr) != PR_SUCCESS) {
    NS_WARNING("failed to bind socket");
    goto fail;
  }

  // get the resulting socket address, which may be different than what
  // we passed to bind.
  if (PR_GetSockName(mFD, &addr) != PR_SUCCESS) {
    NS_WARNING("cannot get socket name");
    goto fail;
  }

  PRNetAddrToNetAddr(&addr, &mAddr);

  // create proxy via IOActivityMonitor
  IOActivityMonitor::MonitorSocket(mFD);

  // wait until AsyncListen is called before polling the socket for
  // client connections.
  return NS_OK;

fail:
  Close();
  return NS_ERROR_FAILURE;
}

NS_IMETHODIMP
nsUDPSocket::Connect(const NetAddr* aAddr) {
  UDPSOCKET_LOG(("nsUDPSocket::Connect [this=%p]\n", this));

  NS_ENSURE_ARG(aAddr);

  if (NS_WARN_IF(!mFD)) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  nsresult rv;

  rv = CheckIOStatus(aAddr);
  if (NS_FAILED(rv)) {
    return rv;
  }

  bool onSTSThread = false;
  mSts->IsOnCurrentThread(&onSTSThread);
  NS_ASSERTION(onSTSThread, "NOT ON STS THREAD");
  if (!onSTSThread) {
    return NS_ERROR_FAILURE;
  }

  PRNetAddr prAddr;
  memset(&prAddr, 0, sizeof(prAddr));
  NetAddrToPRNetAddr(aAddr, &prAddr);

  if (PR_Connect(mFD, &prAddr, PR_INTERVAL_NO_WAIT) != PR_SUCCESS) {
    NS_WARNING("Cannot PR_Connect");
    return NS_ERROR_FAILURE;
  }
  PR_SetFDInheritable(mFD, false);

  // get the resulting socket address, which may have been updated.
  PRNetAddr addr;
  if (PR_GetSockName(mFD, &addr) != PR_SUCCESS) {
    NS_WARNING("cannot get socket name");
    return NS_ERROR_FAILURE;
  }

  PRNetAddrToNetAddr(&addr, &mAddr);

  return NS_OK;
}

NS_IMETHODIMP
nsUDPSocket::Close() {
  {
    MutexAutoLock lock(mLock);
    // we want to proxy the close operation to the socket thread if a listener
    // has been set.  otherwise, we should just close the socket here...
    if (!mListener) {
      // Here we want to go directly with closing the socket since some tests
      // expects this happen synchronously.
      CloseSocket();

      return NS_OK;
    }
  }
  return PostEvent(this, &nsUDPSocket::OnMsgClose);
}

NS_IMETHODIMP
nsUDPSocket::GetPort(int32_t* aResult) {
  // no need to enter the lock here
  uint16_t result;
  nsresult rv = net::GetPort(&mAddr, &result);
  *aResult = static_cast<int32_t>(result);
  return rv;
}

NS_IMETHODIMP
nsUDPSocket::GetLocalAddr(nsINetAddr** aResult) {
  NS_ENSURE_ARG_POINTER(aResult);

  nsCOMPtr<nsINetAddr> result = new nsNetAddr(&mAddr);
  result.forget(aResult);

  return NS_OK;
}

void nsUDPSocket::CloseSocket() {
  if (mFD) {
    if (gIOService->IsNetTearingDown() &&
        ((PR_IntervalNow() - gIOService->NetTearingDownStarted()) >
         gSocketTransportService->MaxTimeForPrClosePref())) {
      // If shutdown last to long, let the socket leak and do not close it.
      UDPSOCKET_LOG(("Intentional leak"));
    } else {
      PRIntervalTime closeStarted = 0;
      if (gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase()) {
        closeStarted = PR_IntervalNow();
      }

      PR_Close(mFD);

      if (gSocketTransportService->IsTelemetryEnabledAndNotSleepPhase()) {
        PRIntervalTime now = PR_IntervalNow();
        if (gIOService->IsNetTearingDown()) {
          Telemetry::Accumulate(Telemetry::PRCLOSE_UDP_BLOCKING_TIME_SHUTDOWN,
                                PR_IntervalToMilliseconds(now - closeStarted));

        } else if (PR_IntervalToSeconds(
                       now - gIOService->LastConnectivityChange()) < 60) {
          Telemetry::Accumulate(
              Telemetry::PRCLOSE_UDP_BLOCKING_TIME_CONNECTIVITY_CHANGE,
              PR_IntervalToMilliseconds(now - closeStarted));

        } else if (PR_IntervalToSeconds(
                       now - gIOService->LastNetworkLinkChange()) < 60) {
          Telemetry::Accumulate(
              Telemetry::PRCLOSE_UDP_BLOCKING_TIME_LINK_CHANGE,
              PR_IntervalToMilliseconds(now - closeStarted));

        } else if (PR_IntervalToSeconds(
                       now - gIOService->LastOfflineStateChange()) < 60) {
          Telemetry::Accumulate(Telemetry::PRCLOSE_UDP_BLOCKING_TIME_OFFLINE,
                                PR_IntervalToMilliseconds(now - closeStarted));

        } else {
          Telemetry::Accumulate(Telemetry::PRCLOSE_UDP_BLOCKING_TIME_NORMAL,
                                PR_IntervalToMilliseconds(now - closeStarted));
        }
      }
    }
    mFD = nullptr;
  }
}

NS_IMETHODIMP
nsUDPSocket::GetAddress(NetAddr* aResult) {
  // no need to enter the lock here
  memcpy(aResult, &mAddr, sizeof(mAddr));
  return NS_OK;
}

namespace {
//-----------------------------------------------------------------------------
// SocketListenerProxy
//-----------------------------------------------------------------------------
class SocketListenerProxy final : public nsIUDPSocketListener {
  ~SocketListenerProxy() = default;

 public:
  explicit SocketListenerProxy(nsIUDPSocketListener* aListener)
      : mListener(new nsMainThreadPtrHolder<nsIUDPSocketListener>(
            "SocketListenerProxy::mListener", aListener)),
        mTarget(GetCurrentThreadEventTarget()) {}

  NS_DECL_THREADSAFE_ISUPPORTS
  NS_DECL_NSIUDPSOCKETLISTENER

  class OnPacketReceivedRunnable : public Runnable {
   public:
    OnPacketReceivedRunnable(
        const nsMainThreadPtrHandle<nsIUDPSocketListener>& aListener,
        nsIUDPSocket* aSocket, nsIUDPMessage* aMessage)
        : Runnable("net::SocketListenerProxy::OnPacketReceivedRunnable"),
          mListener(aListener),
          mSocket(aSocket),
          mMessage(aMessage) {}

    NS_DECL_NSIRUNNABLE

   private:
    nsMainThreadPtrHandle<nsIUDPSocketListener> mListener;
    nsCOMPtr<nsIUDPSocket> mSocket;
    nsCOMPtr<nsIUDPMessage> mMessage;
  };

  class OnStopListeningRunnable : public Runnable {
   public:
    OnStopListeningRunnable(
        const nsMainThreadPtrHandle<nsIUDPSocketListener>& aListener,
        nsIUDPSocket* aSocket, nsresult aStatus)
        : Runnable("net::SocketListenerProxy::OnStopListeningRunnable"),
          mListener(aListener),
          mSocket(aSocket),
          mStatus(aStatus) {}

    NS_DECL_NSIRUNNABLE

   private:
    nsMainThreadPtrHandle<nsIUDPSocketListener> mListener;
    nsCOMPtr<nsIUDPSocket> mSocket;
    nsresult mStatus;
  };

 private:
  nsMainThreadPtrHandle<nsIUDPSocketListener> mListener;
  nsCOMPtr<nsIEventTarget> mTarget;
};

NS_IMPL_ISUPPORTS(SocketListenerProxy, nsIUDPSocketListener)

NS_IMETHODIMP
SocketListenerProxy::OnPacketReceived(nsIUDPSocket* aSocket,
                                      nsIUDPMessage* aMessage) {
  RefPtr<OnPacketReceivedRunnable> r =
      new OnPacketReceivedRunnable(mListener, aSocket, aMessage);
  return mTarget->Dispatch(r, NS_DISPATCH_NORMAL);
}

NS_IMETHODIMP
SocketListenerProxy::OnStopListening(nsIUDPSocket* aSocket, nsresult aStatus) {
  RefPtr<OnStopListeningRunnable> r =
      new OnStopListeningRunnable(mListener, aSocket, aStatus);
  return mTarget->Dispatch(r, NS_DISPATCH_NORMAL);
}

NS_IMETHODIMP
SocketListenerProxy::OnPacketReceivedRunnable::Run() {
  NetAddr netAddr;
  nsCOMPtr<nsINetAddr> nsAddr;
  mMessage->GetFromAddr(getter_AddRefs(nsAddr));
  nsAddr->GetNetAddr(&netAddr);

  nsCOMPtr<nsIOutputStream> outputStream;
  mMessage->GetOutputStream(getter_AddRefs(outputStream));

  FallibleTArray<uint8_t>& data = mMessage->GetDataAsTArray();

  nsCOMPtr<nsIUDPMessage> message =
      new nsUDPMessage(&netAddr, outputStream, data);
  mListener->OnPacketReceived(mSocket, message);
  return NS_OK;
}

NS_IMETHODIMP
SocketListenerProxy::OnStopListeningRunnable::Run() {
  mListener->OnStopListening(mSocket, mStatus);
  return NS_OK;
}

class SocketListenerProxyBackground final : public nsIUDPSocketListener {
  ~SocketListenerProxyBackground() = default;

 public:
  explicit SocketListenerProxyBackground(nsIUDPSocketListener* aListener)
      : mListener(aListener), mTarget(GetCurrentThreadEventTarget()) {}

  NS_DECL_THREADSAFE_ISUPPORTS
  NS_DECL_NSIUDPSOCKETLISTENER

  class OnPacketReceivedRunnable : public Runnable {
   public:
    OnPacketReceivedRunnable(const nsCOMPtr<nsIUDPSocketListener>& aListener,
                             nsIUDPSocket* aSocket, nsIUDPMessage* aMessage)
        : Runnable(
              "net::SocketListenerProxyBackground::OnPacketReceivedRunnable"),
          mListener(aListener),
          mSocket(aSocket),
          mMessage(aMessage) {}

    NS_DECL_NSIRUNNABLE

   private:
    nsCOMPtr<nsIUDPSocketListener> mListener;
    nsCOMPtr<nsIUDPSocket> mSocket;
    nsCOMPtr<nsIUDPMessage> mMessage;
  };

  class OnStopListeningRunnable : public Runnable {
   public:
    OnStopListeningRunnable(const nsCOMPtr<nsIUDPSocketListener>& aListener,
                            nsIUDPSocket* aSocket, nsresult aStatus)
        : Runnable(
              "net::SocketListenerProxyBackground::OnStopListeningRunnable"),
          mListener(aListener),
          mSocket(aSocket),
          mStatus(aStatus) {}

    NS_DECL_NSIRUNNABLE

   private:
    nsCOMPtr<nsIUDPSocketListener> mListener;
    nsCOMPtr<nsIUDPSocket> mSocket;
    nsresult mStatus;
  };

 private:
  nsCOMPtr<nsIUDPSocketListener> mListener;
  nsCOMPtr<nsIEventTarget> mTarget;
};

NS_IMPL_ISUPPORTS(SocketListenerProxyBackground, nsIUDPSocketListener)

NS_IMETHODIMP
SocketListenerProxyBackground::OnPacketReceived(nsIUDPSocket* aSocket,
                                                nsIUDPMessage* aMessage) {
  RefPtr<OnPacketReceivedRunnable> r =
      new OnPacketReceivedRunnable(mListener, aSocket, aMessage);
  return mTarget->Dispatch(r, NS_DISPATCH_NORMAL);
}

NS_IMETHODIMP
SocketListenerProxyBackground::OnStopListening(nsIUDPSocket* aSocket,
                                               nsresult aStatus) {
  RefPtr<OnStopListeningRunnable> r =
      new OnStopListeningRunnable(mListener, aSocket, aStatus);
  return mTarget->Dispatch(r, NS_DISPATCH_NORMAL);
}

NS_IMETHODIMP
SocketListenerProxyBackground::OnPacketReceivedRunnable::Run() {
  NetAddr netAddr;
  nsCOMPtr<nsINetAddr> nsAddr;
  mMessage->GetFromAddr(getter_AddRefs(nsAddr));
  nsAddr->GetNetAddr(&netAddr);

  nsCOMPtr<nsIOutputStream> outputStream;
  mMessage->GetOutputStream(getter_AddRefs(outputStream));

  FallibleTArray<uint8_t>& data = mMessage->GetDataAsTArray();

  UDPSOCKET_LOG(("%s [this=%p], len %zu", __FUNCTION__, this, data.Length()));
  nsCOMPtr<nsIUDPMessage> message =
      new UDPMessageProxy(&netAddr, outputStream, data);
  mListener->OnPacketReceived(mSocket, message);
  return NS_OK;
}

NS_IMETHODIMP
SocketListenerProxyBackground::OnStopListeningRunnable::Run() {
  mListener->OnStopListening(mSocket, mStatus);
  return NS_OK;
}

class PendingSend : public nsIDNSListener {
 public:
  NS_DECL_THREADSAFE_ISUPPORTS
  NS_DECL_NSIDNSLISTENER

  PendingSend(nsUDPSocket* aSocket, uint16_t aPort,
              FallibleTArray<uint8_t>& aData)
      : mSocket(aSocket), mPort(aPort) {
    mData.SwapElements(aData);
  }

 private:
  virtual ~PendingSend() = default;

  RefPtr<nsUDPSocket> mSocket;
  uint16_t mPort;
  FallibleTArray<uint8_t> mData;
};

NS_IMPL_ISUPPORTS(PendingSend, nsIDNSListener)

NS_IMETHODIMP
PendingSend::OnLookupComplete(nsICancelable* request, nsIDNSRecord* rec,
                              nsresult status) {
  if (NS_FAILED(status)) {
    NS_WARNING("Failed to send UDP packet due to DNS lookup failure");
    return NS_OK;
  }

  NetAddr addr;
  if (NS_SUCCEEDED(rec->GetNextAddr(mPort, &addr))) {
    uint32_t count;
    nsresult rv = mSocket->SendWithAddress(&addr, mData, &count);
    NS_ENSURE_SUCCESS(rv, rv);
  }

  return NS_OK;
}

NS_IMETHODIMP
PendingSend::OnLookupByTypeComplete(nsICancelable* aRequest,
                                    nsIDNSByTypeRecord* aRes,
                                    nsresult aStatus) {
  return NS_OK;
}

class PendingSendStream : public nsIDNSListener {
 public:
  NS_DECL_THREADSAFE_ISUPPORTS
  NS_DECL_NSIDNSLISTENER

  PendingSendStream(nsUDPSocket* aSocket, uint16_t aPort,
                    nsIInputStream* aStream)
      : mSocket(aSocket), mPort(aPort), mStream(aStream) {}

 private:
  virtual ~PendingSendStream() = default;

  RefPtr<nsUDPSocket> mSocket;
  uint16_t mPort;
  nsCOMPtr<nsIInputStream> mStream;
};

NS_IMPL_ISUPPORTS(PendingSendStream, nsIDNSListener)

NS_IMETHODIMP
PendingSendStream::OnLookupComplete(nsICancelable* request, nsIDNSRecord* rec,
                                    nsresult status) {
  if (NS_FAILED(status)) {
    NS_WARNING("Failed to send UDP packet due to DNS lookup failure");
    return NS_OK;
  }

  NetAddr addr;
  if (NS_SUCCEEDED(rec->GetNextAddr(mPort, &addr))) {
    nsresult rv = mSocket->SendBinaryStreamWithAddress(&addr, mStream);
    NS_ENSURE_SUCCESS(rv, rv);
  }

  return NS_OK;
}

NS_IMETHODIMP
PendingSendStream::OnLookupByTypeComplete(nsICancelable* aRequest,
                                          nsIDNSByTypeRecord* aRes,
                                          nsresult aStatus) {
  return NS_OK;
}

class SendRequestRunnable : public Runnable {
 public:
  SendRequestRunnable(nsUDPSocket* aSocket, const NetAddr& aAddr,
                      FallibleTArray<uint8_t>&& aData)
      : Runnable("net::SendRequestRunnable"),
        mSocket(aSocket),
        mAddr(aAddr),
        mData(std::move(aData)) {}

  NS_DECL_NSIRUNNABLE

 private:
  RefPtr<nsUDPSocket> mSocket;
  const NetAddr mAddr;
  FallibleTArray<uint8_t> mData;
};

NS_IMETHODIMP
SendRequestRunnable::Run() {
  uint32_t count;
  mSocket->SendWithAddress(&mAddr, mData, &count);
  return NS_OK;
}

}  // namespace

NS_IMETHODIMP
nsUDPSocket::AsyncListen(nsIUDPSocketListener* aListener) {
  // ensuring mFD implies ensuring mLock
  NS_ENSURE_TRUE(mFD, NS_ERROR_NOT_INITIALIZED);
  NS_ENSURE_TRUE(mListener == nullptr, NS_ERROR_IN_PROGRESS);
  {
    MutexAutoLock lock(mLock);
    mListenerTarget = GetCurrentThreadEventTarget();
    if (NS_IsMainThread()) {
      // PNecko usage
      mListener = new SocketListenerProxy(aListener);
    } else {
      // PBackground usage from media/mtransport
      mListener = new SocketListenerProxyBackground(aListener);
    }
  }
  return PostEvent(this, &nsUDPSocket::OnMsgAttach);
}

NS_IMETHODIMP
nsUDPSocket::Send(const nsACString& aHost, uint16_t aPort,
                  const nsTArray<uint8_t>& aData, uint32_t* _retval) {
  NS_ENSURE_ARG_POINTER(_retval);

  *_retval = 0;

  FallibleTArray<uint8_t> fallibleArray;
  if (!fallibleArray.InsertElementsAt(0, aData, fallible)) {
    return NS_ERROR_OUT_OF_MEMORY;
  }

  nsCOMPtr<nsIDNSListener> listener =
      new PendingSend(this, aPort, fallibleArray);

  nsresult rv = ResolveHost(aHost, mOriginAttributes, listener);
  NS_ENSURE_SUCCESS(rv, rv);

  *_retval = aData.Length();
  return NS_OK;
}

NS_IMETHODIMP
nsUDPSocket::SendWithAddr(nsINetAddr* aAddr, const nsTArray<uint8_t>& aData,
                          uint32_t* _retval) {
  NS_ENSURE_ARG(aAddr);
  NS_ENSURE_ARG_POINTER(_retval);

  NetAddr netAddr;
  aAddr->GetNetAddr(&netAddr);
  return SendWithAddress(&netAddr, aData, _retval);
}

NS_IMETHODIMP
nsUDPSocket::SendWithAddress(const NetAddr* aAddr,
                             const nsTArray<uint8_t>& aData,
                             uint32_t* _retval) {
  NS_ENSURE_ARG(aAddr);
  NS_ENSURE_ARG_POINTER(_retval);

  *_retval = 0;

  PRNetAddr prAddr;
  NetAddrToPRNetAddr(aAddr, &prAddr);

  bool onSTSThread = false;
  mSts->IsOnCurrentThread(&onSTSThread);

  if (onSTSThread) {
    MutexAutoLock lock(mLock);
    if (!mFD) {
      // socket is not initialized or has been closed
      return NS_ERROR_FAILURE;
    }
    int32_t count =
        PR_SendTo(mFD, aData.Elements(), sizeof(uint8_t) * aData.Length(), 0,
                  &prAddr, PR_INTERVAL_NO_WAIT);
    if (count < 0) {
      PRErrorCode code = PR_GetError();
      return ErrorAccordingToNSPR(code);
    }
    this->AddOutputBytes(count);
    *_retval = count;
  } else {
    FallibleTArray<uint8_t> fallibleArray;
    if (!fallibleArray.InsertElementsAt(0, aData, fallible)) {
      return NS_ERROR_OUT_OF_MEMORY;
    }

    nsresult rv = mSts->Dispatch(
        new SendRequestRunnable(this, *aAddr, std::move(fallibleArray)),
        NS_DISPATCH_NORMAL);
    NS_ENSURE_SUCCESS(rv, rv);
    *_retval = aData.Length();
  }
  return NS_OK;
}

NS_IMETHODIMP
nsUDPSocket::SendBinaryStream(const nsACString& aHost, uint16_t aPort,
                              nsIInputStream* aStream) {
  NS_ENSURE_ARG(aStream);

  nsCOMPtr<nsIDNSListener> listener =
      new PendingSendStream(this, aPort, aStream);

  return ResolveHost(aHost, mOriginAttributes, listener);
}

NS_IMETHODIMP
nsUDPSocket::SendBinaryStreamWithAddress(const NetAddr* aAddr,
                                         nsIInputStream* aStream) {
  NS_ENSURE_ARG(aAddr);
  NS_ENSURE_ARG(aStream);

  PRNetAddr prAddr;
  PR_InitializeNetAddr(PR_IpAddrAny, 0, &prAddr);
  NetAddrToPRNetAddr(aAddr, &prAddr);

  RefPtr<nsUDPOutputStream> os = new nsUDPOutputStream(this, mFD, prAddr);
  return NS_AsyncCopy(aStream, os, mSts, NS_ASYNCCOPY_VIA_READSEGMENTS,
                      UDP_PACKET_CHUNK_SIZE);
}

nsresult nsUDPSocket::SetSocketOption(const PRSocketOptionData& aOpt) {
  bool onSTSThread = false;
  mSts->IsOnCurrentThread(&onSTSThread);

  if (!onSTSThread) {
    // Dispatch to STS thread and re-enter this method there
    nsCOMPtr<nsIRunnable> runnable = new SetSocketOptionRunnable(this, aOpt);
    nsresult rv = mSts->Dispatch(runnable, NS_DISPATCH_NORMAL);
    if (NS_WARN_IF(NS_FAILED(rv))) {
      return rv;
    }
    return NS_OK;
  }

  if (NS_WARN_IF(!mFD)) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  if (PR_SetSocketOption(mFD, &aOpt) != PR_SUCCESS) {
    UDPSOCKET_LOG(
        ("nsUDPSocket::SetSocketOption [this=%p] failed for type %d, "
         "error %d\n",
         this, aOpt.option, PR_GetError()));
    return NS_ERROR_FAILURE;
  }

  return NS_OK;
}

NS_IMETHODIMP
nsUDPSocket::JoinMulticast(const nsACString& aAddr, const nsACString& aIface) {
  if (NS_WARN_IF(aAddr.IsEmpty())) {
    return NS_ERROR_INVALID_ARG;
  }
  if (NS_WARN_IF(!mFD)) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  PRNetAddr prAddr;
  if (PR_StringToNetAddr(aAddr.BeginReading(), &prAddr) != PR_SUCCESS) {
    return NS_ERROR_FAILURE;
  }

  PRNetAddr prIface;
  if (aIface.IsEmpty()) {
    PR_InitializeNetAddr(PR_IpAddrAny, 0, &prIface);
  } else {
    if (PR_StringToNetAddr(aIface.BeginReading(), &prIface) != PR_SUCCESS) {
      return NS_ERROR_FAILURE;
    }
  }

  return JoinMulticastInternal(prAddr, prIface);
}

NS_IMETHODIMP
nsUDPSocket::JoinMulticastAddr(const NetAddr aAddr, const NetAddr* aIface) {
  if (NS_WARN_IF(!mFD)) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  PRNetAddr prAddr;
  NetAddrToPRNetAddr(&aAddr, &prAddr);

  PRNetAddr prIface;
  if (!aIface) {
    PR_InitializeNetAddr(PR_IpAddrAny, 0, &prIface);
  } else {
    NetAddrToPRNetAddr(aIface, &prIface);
  }

  return JoinMulticastInternal(prAddr, prIface);
}

nsresult nsUDPSocket::JoinMulticastInternal(const PRNetAddr& aAddr,
                                            const PRNetAddr& aIface) {
  PRSocketOptionData opt;

  opt.option = PR_SockOpt_AddMember;
  opt.value.add_member.mcaddr = aAddr;
  opt.value.add_member.ifaddr = aIface;

  nsresult rv = SetSocketOption(opt);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return NS_ERROR_FAILURE;
  }

  return NS_OK;
}

NS_IMETHODIMP
nsUDPSocket::LeaveMulticast(const nsACString& aAddr, const nsACString& aIface) {
  if (NS_WARN_IF(aAddr.IsEmpty())) {
    return NS_ERROR_INVALID_ARG;
  }
  if (NS_WARN_IF(!mFD)) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  PRNetAddr prAddr;
  if (PR_StringToNetAddr(aAddr.BeginReading(), &prAddr) != PR_SUCCESS) {
    return NS_ERROR_FAILURE;
  }

  PRNetAddr prIface;
  if (aIface.IsEmpty()) {
    PR_InitializeNetAddr(PR_IpAddrAny, 0, &prIface);
  } else {
    if (PR_StringToNetAddr(aIface.BeginReading(), &prIface) != PR_SUCCESS) {
      return NS_ERROR_FAILURE;
    }
  }

  return LeaveMulticastInternal(prAddr, prIface);
}

NS_IMETHODIMP
nsUDPSocket::LeaveMulticastAddr(const NetAddr aAddr, const NetAddr* aIface) {
  if (NS_WARN_IF(!mFD)) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  PRNetAddr prAddr;
  NetAddrToPRNetAddr(&aAddr, &prAddr);

  PRNetAddr prIface;
  if (!aIface) {
    PR_InitializeNetAddr(PR_IpAddrAny, 0, &prIface);
  } else {
    NetAddrToPRNetAddr(aIface, &prIface);
  }

  return LeaveMulticastInternal(prAddr, prIface);
}

nsresult nsUDPSocket::LeaveMulticastInternal(const PRNetAddr& aAddr,
                                             const PRNetAddr& aIface) {
  PRSocketOptionData opt;

  opt.option = PR_SockOpt_DropMember;
  opt.value.drop_member.mcaddr = aAddr;
  opt.value.drop_member.ifaddr = aIface;

  nsresult rv = SetSocketOption(opt);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return NS_ERROR_FAILURE;
  }

  return NS_OK;
}

NS_IMETHODIMP
nsUDPSocket::GetMulticastLoopback(bool* aLoopback) {
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsUDPSocket::SetMulticastLoopback(bool aLoopback) {
  if (NS_WARN_IF(!mFD)) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  PRSocketOptionData opt;

  opt.option = PR_SockOpt_McastLoopback;
  opt.value.mcast_loopback = aLoopback;

  nsresult rv = SetSocketOption(opt);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return NS_ERROR_FAILURE;
  }

  return NS_OK;
}

NS_IMETHODIMP
nsUDPSocket::GetRecvBufferSize(int* size) {
  // Bug 1252759 - missing support for GetSocketOption
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsUDPSocket::SetRecvBufferSize(int size) {
  if (NS_WARN_IF(!mFD)) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  PRSocketOptionData opt;

  opt.option = PR_SockOpt_RecvBufferSize;
  opt.value.recv_buffer_size = size;

  nsresult rv = SetSocketOption(opt);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return NS_ERROR_FAILURE;
  }

  return NS_OK;
}

NS_IMETHODIMP
nsUDPSocket::GetSendBufferSize(int* size) {
  // Bug 1252759 - missing support for GetSocketOption
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsUDPSocket::SetSendBufferSize(int size) {
  if (NS_WARN_IF(!mFD)) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  PRSocketOptionData opt;

  opt.option = PR_SockOpt_SendBufferSize;
  opt.value.send_buffer_size = size;

  nsresult rv = SetSocketOption(opt);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return NS_ERROR_FAILURE;
  }

  return NS_OK;
}

NS_IMETHODIMP
nsUDPSocket::GetMulticastInterface(nsACString& aIface) {
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsUDPSocket::GetMulticastInterfaceAddr(NetAddr* aIface) {
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
nsUDPSocket::SetMulticastInterface(const nsACString& aIface) {
  if (NS_WARN_IF(!mFD)) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  PRNetAddr prIface;
  if (aIface.IsEmpty()) {
    PR_InitializeNetAddr(PR_IpAddrAny, 0, &prIface);
  } else {
    if (PR_StringToNetAddr(aIface.BeginReading(), &prIface) != PR_SUCCESS) {
      return NS_ERROR_FAILURE;
    }
  }

  return SetMulticastInterfaceInternal(prIface);
}

NS_IMETHODIMP
nsUDPSocket::SetMulticastInterfaceAddr(NetAddr aIface) {
  if (NS_WARN_IF(!mFD)) {
    return NS_ERROR_NOT_INITIALIZED;
  }

  PRNetAddr prIface;
  NetAddrToPRNetAddr(&aIface, &prIface);

  return SetMulticastInterfaceInternal(prIface);
}

nsresult nsUDPSocket::SetMulticastInterfaceInternal(const PRNetAddr& aIface) {
  PRSocketOptionData opt;

  opt.option = PR_SockOpt_McastInterface;
  opt.value.mcast_if = aIface;

  nsresult rv = SetSocketOption(opt);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return NS_ERROR_FAILURE;
  }

  return NS_OK;
}

}  // namespace net
}  // namespace mozilla