ipc/ipc_message_utils.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ipc/ipc_message_utils.h"
   6
   7 #include "base/file_path.h"
   8 #include "base/json/json_writer.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/nullable_string16.h"
  11 #include "base/string_number_conversions.h"
  12 #include "base/time.h"
  13 #include "base/utf_string_conversions.h"
  14 #include "base/values.h"
  15 #include "ipc/ipc_channel_handle.h"
  16
  17 #if defined(OS_POSIX)
  18 #include "ipc/file_descriptor_set_posix.h"
  19 #endif
  20
  21 namespace IPC {
  22
  23 namespace {
  24
  25 const int kMaxRecursionDepth = 100;
  26
  27 template<typename CharType>
  28 void LogBytes(const std::vector<CharType>& data, std::string* out) {
  29 #if defined(OS_WIN)
  30   // Windows has a GUI for logging, which can handle arbitrary binary data.
  31   for (size_t i = 0; i < data.size(); ++i)
  32     out->push_back(data[i]);
  33 #else
  34   // On POSIX, we log to stdout, which we assume can display ASCII.
  35   static const size_t kMaxBytesToLog = 100;
  36   for (size_t i = 0; i < std::min(data.size(), kMaxBytesToLog); ++i) {
  37     if (isprint(data[i]))
  38       out->push_back(data[i]);
  39     else
  40       out->append(StringPrintf("[%02X]", static_cast<unsigned char>(data[i])));
  41   }
  42   if (data.size() > kMaxBytesToLog) {
  43     out->append(
  44         StringPrintf(" and %u more bytes",
  45                      static_cast<unsigned>(data.size() - kMaxBytesToLog)));
  46   }
  47 #endif
  48 }
  49
  50 bool ReadValue(const Message* m, PickleIterator* iter, Value** value,
  51                int recursion);
  52
  53 void WriteValue(Message* m, const Value* value, int recursion) {
  54   bool result;
  55   if (recursion > kMaxRecursionDepth) {
  56     LOG(WARNING) << "Max recursion depth hit in WriteValue.";
  57     return;
  58   }
  59
  60   m->WriteInt(value->GetType());
  61
  62   switch (value->GetType()) {
  63     case Value::TYPE_NULL:
  64     break;
  65     case Value::TYPE_BOOLEAN: {
  66       bool val;
  67       result = value->GetAsBoolean(&val);
  68       DCHECK(result);
  69       WriteParam(m, val);
  70       break;
  71     }
  72     case Value::TYPE_INTEGER: {
  73       int val;
  74       result = value->GetAsInteger(&val);
  75       DCHECK(result);
  76       WriteParam(m, val);
  77       break;
  78     }
  79     case Value::TYPE_DOUBLE: {
  80       double val;
  81       result = value->GetAsDouble(&val);
  82       DCHECK(result);
  83       WriteParam(m, val);
  84       break;
  85     }
  86     case Value::TYPE_STRING: {
  87       std::string val;
  88       result = value->GetAsString(&val);
  89       DCHECK(result);
  90       WriteParam(m, val);
  91       break;
  92     }
  93     case Value::TYPE_BINARY: {
  94       const base::BinaryValue* binary =
  95           static_cast<const base::BinaryValue*>(value);
  96       m->WriteData(binary->GetBuffer(), static_cast<int>(binary->GetSize()));
  97       break;
  98     }
  99     case Value::TYPE_DICTIONARY: {
 100       const DictionaryValue* dict = static_cast<const DictionaryValue*>(value);
 101
 102       WriteParam(m, static_cast<int>(dict->size()));
 103
 104       for (DictionaryValue::key_iterator it = dict->begin_keys();
 105            it != dict->end_keys(); ++it) {
 106         const Value* subval;
 107         if (dict->GetWithoutPathExpansion(*it, &subval)) {
 108           WriteParam(m, *it);
 109           WriteValue(m, subval, recursion + 1);
 110         } else {
 111           NOTREACHED() << "DictionaryValue iterators are filthy liars.";
 112         }
 113       }
 114       break;
 115     }
 116     case Value::TYPE_LIST: {
 117       const ListValue* list = static_cast<const ListValue*>(value);
 118       WriteParam(m, static_cast<int>(list->GetSize()));
 119       for (size_t i = 0; i < list->GetSize(); ++i) {
 120         const Value* subval;
 121         if (list->Get(i, &subval)) {
 122           WriteValue(m, subval, recursion + 1);
 123         } else {
 124           NOTREACHED() << "ListValue::GetSize is a filthy liar.";
 125         }
 126       }
 127       break;
 128     }
 129   }
 130 }
 131
 132 // Helper for ReadValue that reads a DictionaryValue into a pre-allocated
 133 // object.
 134 bool ReadDictionaryValue(const Message* m, PickleIterator* iter,
 135                          DictionaryValue* value, int recursion) {
 136   int size;
 137   if (!ReadParam(m, iter, &size))
 138     return false;
 139
 140   for (int i = 0; i < size; ++i) {
 141     std::string key;
 142     Value* subval;
 143     if (!ReadParam(m, iter, &key) ||
 144         !ReadValue(m, iter, &subval, recursion + 1))
 145       return false;
 146     value->SetWithoutPathExpansion(key, subval);
 147   }
 148
 149   return true;
 150 }
 151
 152 // Helper for ReadValue that reads a ReadListValue into a pre-allocated
 153 // object.
 154 bool ReadListValue(const Message* m, PickleIterator* iter,
 155                    ListValue* value, int recursion) {
 156   int size;
 157   if (!ReadParam(m, iter, &size))
 158     return false;
 159
 160   for (int i = 0; i < size; ++i) {
 161     Value* subval;
 162     if (!ReadValue(m, iter, &subval, recursion + 1))
 163       return false;
 164     value->Set(i, subval);
 165   }
 166
 167   return true;
 168 }
 169
 170 bool ReadValue(const Message* m, PickleIterator* iter, Value** value,
 171                int recursion) {
 172   if (recursion > kMaxRecursionDepth) {
 173     LOG(WARNING) << "Max recursion depth hit in ReadValue.";
 174     return false;
 175   }
 176
 177   int type;
 178   if (!ReadParam(m, iter, &type))
 179     return false;
 180
 181   switch (type) {
 182     case Value::TYPE_NULL:
 183     *value = Value::CreateNullValue();
 184     break;
 185     case Value::TYPE_BOOLEAN: {
 186       bool val;
 187       if (!ReadParam(m, iter, &val))
 188         return false;
 189       *value = Value::CreateBooleanValue(val);
 190       break;
 191     }
 192     case Value::TYPE_INTEGER: {
 193       int val;
 194       if (!ReadParam(m, iter, &val))
 195         return false;
 196       *value = Value::CreateIntegerValue(val);
 197       break;
 198     }
 199     case Value::TYPE_DOUBLE: {
 200       double val;
 201       if (!ReadParam(m, iter, &val))
 202         return false;
 203       *value = Value::CreateDoubleValue(val);
 204       break;
 205     }
 206     case Value::TYPE_STRING: {
 207       std::string val;
 208       if (!ReadParam(m, iter, &val))
 209         return false;
 210       *value = Value::CreateStringValue(val);
 211       break;
 212     }
 213     case Value::TYPE_BINARY: {
 214       const char* data;
 215       int length;
 216       if (!m->ReadData(iter, &data, &length))
 217         return false;
 218       *value = base::BinaryValue::CreateWithCopiedBuffer(data, length);
 219       break;
 220     }
 221     case Value::TYPE_DICTIONARY: {
 222       scoped_ptr<DictionaryValue> val(new DictionaryValue());
 223       if (!ReadDictionaryValue(m, iter, val.get(), recursion))
 224         return false;
 225       *value = val.release();
 226       break;
 227     }
 228     case Value::TYPE_LIST: {
 229       scoped_ptr<ListValue> val(new ListValue());
 230       if (!ReadListValue(m, iter, val.get(), recursion))
 231         return false;
 232       *value = val.release();
 233       break;
 234     }
 235     default:
 236     return false;
 237   }
 238
 239   return true;
 240 }
 241
 242 }  // namespace
 243
 244 // -----------------------------------------------------------------------------
 245
 246 LogData::LogData()
 247     : routing_id(0),
 248       type(0),
 249       sent(0),
 250       receive(0),
 251       dispatch(0) {
 252 }
 253
 254 LogData::~LogData() {
 255 }
 256
 257 MessageIterator::MessageIterator(const Message& m) : iter_(m) {
 258 }
 259
 260 int MessageIterator::NextInt() const {
 261   int val = -1;
 262   if (!iter_.ReadInt(&val))
 263     NOTREACHED();
 264   return val;
 265 }
 266
 267 const std::string MessageIterator::NextString() const {
 268   std::string val;
 269   if (!iter_.ReadString(&val))
 270     NOTREACHED();
 271   return val;
 272 }
 273
 274 void ParamTraits<bool>::Log(const param_type& p, std::string* l) {
 275   l->append(p ? "true" : "false");
 276 }
 277
 278 void ParamTraits<int>::Log(const param_type& p, std::string* l) {
 279   l->append(base::IntToString(p));
 280 }
 281
 282 void ParamTraits<unsigned int>::Log(const param_type& p, std::string* l) {
 283   l->append(base::UintToString(p));
 284 }
 285
 286 void ParamTraits<long>::Log(const param_type& p, std::string* l) {
 287   l->append(base::Int64ToString(static_cast<int64>(p)));
 288 }
 289
 290 void ParamTraits<unsigned long>::Log(const param_type& p, std::string* l) {
 291   l->append(base::Uint64ToString(static_cast<uint64>(p)));
 292 }
 293
 294 void ParamTraits<long long>::Log(const param_type& p, std::string* l) {
 295   l->append(base::Int64ToString(static_cast<int64>(p)));
 296 }
 297
 298 void ParamTraits<unsigned long long>::Log(const param_type& p, std::string* l) {
 299   l->append(base::Uint64ToString(p));
 300 }
 301
 302 void ParamTraits<unsigned short>::Write(Message* m, const param_type& p) {
 303   m->WriteBytes(&p, sizeof(param_type));
 304 }
 305
 306 bool ParamTraits<unsigned short>::Read(const Message* m, PickleIterator* iter,
 307                                        param_type* r) {
 308   const char* data;
 309   if (!m->ReadBytes(iter, &data, sizeof(param_type)))
 310     return false;
 311   memcpy(r, data, sizeof(param_type));
 312   return true;
 313 }
 314
 315 void ParamTraits<unsigned short>::Log(const param_type& p, std::string* l) {
 316   l->append(base::UintToString(p));
 317 }
 318
 319 void ParamTraits<float>::Write(Message* m, const param_type& p) {
 320   m->WriteData(reinterpret_cast<const char*>(&p), sizeof(param_type));
 321 }
 322
 323 bool ParamTraits<float>::Read(const Message* m, PickleIterator* iter,
 324                               param_type* r) {
 325   const char *data;
 326   int data_size;
 327   if (!m->ReadData(iter, &data, &data_size) ||
 328       data_size != sizeof(param_type)) {
 329     NOTREACHED();
 330     return false;
 331   }
 332   memcpy(r, data, sizeof(param_type));
 333   return true;
 334 }
 335
 336 void ParamTraits<float>::Log(const param_type& p, std::string* l) {
 337   l->append(StringPrintf("%e", p));
 338 }
 339
 340 void ParamTraits<double>::Write(Message* m, const param_type& p) {
 341   m->WriteData(reinterpret_cast<const char*>(&p), sizeof(param_type));
 342 }
 343
 344 bool ParamTraits<double>::Read(const Message* m, PickleIterator* iter,
 345                                param_type* r) {
 346   const char *data;
 347   int data_size;
 348   if (!m->ReadData(iter, &data, &data_size) ||
 349       data_size != sizeof(param_type)) {
 350     NOTREACHED();
 351     return false;
 352   }
 353   memcpy(r, data, sizeof(param_type));
 354   return true;
 355 }
 356
 357 void ParamTraits<double>::Log(const param_type& p, std::string* l) {
 358   l->append(StringPrintf("%e", p));
 359 }
 360
 361
 362 void ParamTraits<std::string>::Log(const param_type& p, std::string* l) {
 363   l->append(p);
 364 }
 365
 366 void ParamTraits<std::wstring>::Log(const param_type& p, std::string* l) {
 367   l->append(WideToUTF8(p));
 368 }
 369
 370 #if !defined(WCHAR_T_IS_UTF16)
 371 void ParamTraits<string16>::Log(const param_type& p, std::string* l) {
 372   l->append(UTF16ToUTF8(p));
 373 }
 374 #endif
 375
 376 void ParamTraits<std::vector<char> >::Write(Message* m, const param_type& p) {
 377   if (p.empty()) {
 378     m->WriteData(NULL, 0);
 379   } else {
 380     m->WriteData(&p.front(), static_cast<int>(p.size()));
 381   }
 382 }
 383
 384 bool ParamTraits<std::vector<char> >::Read(const Message* m,
 385                                            PickleIterator* iter,
 386                                            param_type* r) {
 387   const char *data;
 388   int data_size = 0;
 389   if (!m->ReadData(iter, &data, &data_size) || data_size < 0)
 390     return false;
 391   r->resize(data_size);
 392   if (data_size)
 393     memcpy(&r->front(), data, data_size);
 394   return true;
 395 }
 396
 397 void ParamTraits<std::vector<char> >::Log(const param_type& p, std::string* l) {
 398   LogBytes(p, l);
 399 }
 400
 401 void ParamTraits<std::vector<unsigned char> >::Write(Message* m,
 402                                                      const param_type& p) {
 403   if (p.empty()) {
 404     m->WriteData(NULL, 0);
 405   } else {
 406     m->WriteData(reinterpret_cast<const char*>(&p.front()),
 407                  static_cast<int>(p.size()));
 408   }
 409 }
 410
 411 bool ParamTraits<std::vector<unsigned char> >::Read(const Message* m,
 412                                                     PickleIterator* iter,
 413                                                     param_type* r) {
 414   const char *data;
 415   int data_size = 0;
 416   if (!m->ReadData(iter, &data, &data_size) || data_size < 0)
 417     return false;
 418   r->resize(data_size);
 419   if (data_size)
 420     memcpy(&r->front(), data, data_size);
 421   return true;
 422 }
 423
 424 void ParamTraits<std::vector<unsigned char> >::Log(const param_type& p,
 425                                                    std::string* l) {
 426   LogBytes(p, l);
 427 }
 428
 429 void ParamTraits<std::vector<bool> >::Write(Message* m, const param_type& p) {
 430   WriteParam(m, static_cast<int>(p.size()));
 431   for (size_t i = 0; i < p.size(); i++)
 432     WriteParam(m, p[i]);
 433 }
 434
 435 bool ParamTraits<std::vector<bool> >::Read(const Message* m,
 436                                            PickleIterator* iter,
 437                                            param_type* r) {
 438   int size;
 439   // ReadLength() checks for < 0 itself.
 440   if (!m->ReadLength(iter, &size))
 441     return false;
 442   r->resize(size);
 443   for (int i = 0; i < size; i++) {
 444     bool value;
 445     if (!ReadParam(m, iter, &value))
 446       return false;
 447     (*r)[i] = value;
 448   }
 449   return true;
 450 }
 451
 452 void ParamTraits<std::vector<bool> >::Log(const param_type& p, std::string* l) {
 453   for (size_t i = 0; i < p.size(); ++i) {
 454     if (i != 0)
 455       l->push_back(' ');
 456     LogParam((p[i]), l);
 457   }
 458 }
 459
 460 void ParamTraits<DictionaryValue>::Write(Message* m, const param_type& p) {
 461   WriteValue(m, &p, 0);
 462 }
 463
 464 bool ParamTraits<DictionaryValue>::Read(
 465     const Message* m, PickleIterator* iter, param_type* r) {
 466   int type;
 467   if (!ReadParam(m, iter, &type) || type != Value::TYPE_DICTIONARY)
 468     return false;
 469
 470   return ReadDictionaryValue(m, iter, r, 0);
 471 }
 472
 473 void ParamTraits<DictionaryValue>::Log(const param_type& p, std::string* l) {
 474   std::string json;
 475   base::JSONWriter::Write(&p, &json);
 476   l->append(json);
 477 }
 478
 479 #if defined(OS_POSIX)
 480 void ParamTraits<base::FileDescriptor>::Write(Message* m, const param_type& p) {
 481   const bool valid = p.fd >= 0;
 482   WriteParam(m, valid);
 483
 484   if (valid) {
 485     if (!m->WriteFileDescriptor(p))
 486       NOTREACHED();
 487   }
 488 }
 489
 490 bool ParamTraits<base::FileDescriptor>::Read(const Message* m,
 491                                              PickleIterator* iter,
 492                                              param_type* r) {
 493   bool valid;
 494   if (!ReadParam(m, iter, &valid))
 495     return false;
 496
 497   if (!valid) {
 498     r->fd = -1;
 499     r->auto_close = false;
 500     return true;
 501   }
 502
 503   return m->ReadFileDescriptor(iter, r);
 504 }
 505
 506 void ParamTraits<base::FileDescriptor>::Log(const param_type& p,
 507                                             std::string* l) {
 508   if (p.auto_close) {
 509     l->append(StringPrintf("FD(%d auto-close)", p.fd));
 510   } else {
 511     l->append(StringPrintf("FD(%d)", p.fd));
 512   }
 513 }
 514 #endif  // defined(OS_POSIX)
 515
 516 void ParamTraits<FilePath>::Write(Message* m, const param_type& p) {
 517   ParamTraits<FilePath::StringType>::Write(m, p.value());
 518 }
 519
 520 bool ParamTraits<FilePath>::Read(const Message* m,
 521                                  PickleIterator* iter,
 522                                  param_type* r) {
 523   FilePath::StringType value;
 524   if (!ParamTraits<FilePath::StringType>::Read(m, iter, &value))
 525     return false;
 526   *r = FilePath(value);
 527   return true;
 528 }
 529
 530 void ParamTraits<FilePath>::Log(const param_type& p, std::string* l) {
 531   ParamTraits<FilePath::StringType>::Log(p.value(), l);
 532 }
 533
 534 void ParamTraits<ListValue>::Write(Message* m, const param_type& p) {
 535   WriteValue(m, &p, 0);
 536 }
 537
 538 bool ParamTraits<ListValue>::Read(
 539     const Message* m, PickleIterator* iter, param_type* r) {
 540   int type;
 541   if (!ReadParam(m, iter, &type) || type != Value::TYPE_LIST)
 542     return false;
 543
 544   return ReadListValue(m, iter, r, 0);
 545 }
 546
 547 void ParamTraits<ListValue>::Log(const param_type& p, std::string* l) {
 548   std::string json;
 549   base::JSONWriter::Write(&p, &json);
 550   l->append(json);
 551 }
 552
 553 void ParamTraits<NullableString16>::Write(Message* m, const param_type& p) {
 554   WriteParam(m, p.string());
 555   WriteParam(m, p.is_null());
 556 }
 557
 558 bool ParamTraits<NullableString16>::Read(const Message* m, PickleIterator* iter,
 559                                          param_type* r) {
 560   string16 string;
 561   if (!ReadParam(m, iter, &string))
 562     return false;
 563   bool is_null;
 564   if (!ReadParam(m, iter, &is_null))
 565     return false;
 566   *r = NullableString16(string, is_null);
 567   return true;
 568 }
 569
 570 void ParamTraits<NullableString16>::Log(const param_type& p, std::string* l) {
 571   l->append("(");
 572   LogParam(p.string(), l);
 573   l->append(", ");
 574   LogParam(p.is_null(), l);
 575   l->append(")");
 576 }
 577
 578 void ParamTraits<base::PlatformFileInfo>::Write(Message* m,
 579                                                 const param_type& p) {
 580   WriteParam(m, p.size);
 581   WriteParam(m, p.is_directory);
 582   WriteParam(m, p.last_modified.ToDoubleT());
 583   WriteParam(m, p.last_accessed.ToDoubleT());
 584   WriteParam(m, p.creation_time.ToDoubleT());
 585 }
 586
 587 bool ParamTraits<base::PlatformFileInfo>::Read(const Message* m,
 588                                                PickleIterator* iter,
 589                                                param_type* p) {
 590   double last_modified;
 591   double last_accessed;
 592   double creation_time;
 593   bool result =
 594       ReadParam(m, iter, &p->size) &&
 595       ReadParam(m, iter, &p->is_directory) &&
 596       ReadParam(m, iter, &last_modified) &&
 597       ReadParam(m, iter, &last_accessed) &&
 598       ReadParam(m, iter, &creation_time);
 599   if (result) {
 600     p->last_modified = base::Time::FromDoubleT(last_modified);
 601     p->last_accessed = base::Time::FromDoubleT(last_accessed);
 602     p->creation_time = base::Time::FromDoubleT(creation_time);
 603   }
 604   return result;
 605 }
 606
 607 void ParamTraits<base::PlatformFileInfo>::Log(const param_type& p,
 608                                               std::string* l) {
 609   l->append("(");
 610   LogParam(p.size, l);
 611   l->append(",");
 612   LogParam(p.is_directory, l);
 613   l->append(",");
 614   LogParam(p.last_modified.ToDoubleT(), l);
 615   l->append(",");
 616   LogParam(p.last_accessed.ToDoubleT(), l);
 617   l->append(",");
 618   LogParam(p.creation_time.ToDoubleT(), l);
 619   l->append(")");
 620 }
 621
 622 void ParamTraits<base::Time>::Write(Message* m, const param_type& p) {
 623   ParamTraits<int64>::Write(m, p.ToInternalValue());
 624 }
 625
 626 bool ParamTraits<base::Time>::Read(const Message* m, PickleIterator* iter,
 627                                    param_type* r) {
 628   int64 value;
 629   if (!ParamTraits<int64>::Read(m, iter, &value))
 630     return false;
 631   *r = base::Time::FromInternalValue(value);
 632   return true;
 633 }
 634
 635 void ParamTraits<base::Time>::Log(const param_type& p, std::string* l) {
 636   ParamTraits<int64>::Log(p.ToInternalValue(), l);
 637 }
 638
 639 void ParamTraits<base::TimeDelta>::Write(Message* m, const param_type& p) {
 640   ParamTraits<int64>::Write(m, p.ToInternalValue());
 641 }
 642
 643 bool ParamTraits<base::TimeDelta>::Read(const Message* m,
 644                                         PickleIterator* iter,
 645                                         param_type* r) {
 646   int64 value;
 647   bool ret = ParamTraits<int64>::Read(m, iter, &value);
 648   if (ret)
 649     *r = base::TimeDelta::FromInternalValue(value);
 650
 651   return ret;
 652 }
 653
 654 void ParamTraits<base::TimeDelta>::Log(const param_type& p, std::string* l) {
 655   ParamTraits<int64>::Log(p.ToInternalValue(), l);
 656 }
 657
 658 void ParamTraits<base::TimeTicks>::Write(Message* m, const param_type& p) {
 659   ParamTraits<int64>::Write(m, p.ToInternalValue());
 660 }
 661
 662 bool ParamTraits<base::TimeTicks>::Read(const Message* m,
 663                                         PickleIterator* iter,
 664                                         param_type* r) {
 665   int64 value;
 666   bool ret = ParamTraits<int64>::Read(m, iter, &value);
 667   if (ret)
 668     *r = base::TimeTicks::FromInternalValue(value);
 669
 670   return ret;
 671 }
 672
 673 void ParamTraits<base::TimeTicks>::Log(const param_type& p, std::string* l) {
 674   ParamTraits<int64>::Log(p.ToInternalValue(), l);
 675 }
 676
 677 void ParamTraits<IPC::ChannelHandle>::Write(Message* m, const param_type& p) {
 678 #if defined(OS_WIN)
 679   // On Windows marshalling pipe handle is not supported.
 680   DCHECK(p.pipe.handle == NULL);
 681 #endif  // defined (OS_WIN)
 682   WriteParam(m, p.name);
 683 #if defined(OS_POSIX)
 684   WriteParam(m, p.socket);
 685 #endif
 686 }
 687
 688 bool ParamTraits<IPC::ChannelHandle>::Read(const Message* m,
 689                                            PickleIterator* iter,
 690                                            param_type* r) {
 691   return ReadParam(m, iter, &r->name)
 692 #if defined(OS_POSIX)
 693       && ReadParam(m, iter, &r->socket)
 694 #endif
 695       ;
 696 }
 697
 698 void ParamTraits<IPC::ChannelHandle>::Log(const param_type& p,
 699                                           std::string* l) {
 700   l->append(StringPrintf("ChannelHandle(%s", p.name.c_str()));
 701 #if defined(OS_POSIX)
 702   l->append(", ");
 703   ParamTraits<base::FileDescriptor>::Log(p.socket, l);
 704 #endif
 705   l->append(")");
 706 }
 707
 708 void ParamTraits<LogData>::Write(Message* m, const param_type& p) {
 709   WriteParam(m, p.channel);
 710   WriteParam(m, p.routing_id);
 711   WriteParam(m, p.type);
 712   WriteParam(m, p.flags);
 713   WriteParam(m, p.sent);
 714   WriteParam(m, p.receive);
 715   WriteParam(m, p.dispatch);
 716   WriteParam(m, p.params);
 717 }
 718
 719 bool ParamTraits<LogData>::Read(const Message* m,
 720                                 PickleIterator* iter,
 721                                 param_type* r) {
 722   return
 723       ReadParam(m, iter, &r->channel) &&
 724       ReadParam(m, iter, &r->routing_id) &&
 725       ReadParam(m, iter, &r->type) &&
 726       ReadParam(m, iter, &r->flags) &&
 727       ReadParam(m, iter, &r->sent) &&
 728       ReadParam(m, iter, &r->receive) &&
 729       ReadParam(m, iter, &r->dispatch) &&
 730       ReadParam(m, iter, &r->params);
 731 }
 732
 733 void ParamTraits<LogData>::Log(const param_type& p, std::string* l) {
 734   // Doesn't make sense to implement this!
 735 }
 736
 737 void ParamTraits<Message>::Write(Message* m, const Message& p) {
 738 #if defined(OS_POSIX)
 739   // We don't serialize the file descriptors in the nested message, so there
 740   // better not be any.
 741   DCHECK(!p.HasFileDescriptors());
 742 #endif
 743
 744   // Don't just write out the message. This is used to send messages between
 745   // NaCl (Posix environment) and the browser (could be on Windows). The message
 746   // header formats differ between these systems (so does handle sharing, but
 747   // we already asserted we don't have any handles). So just write out the
 748   // parts of the header we use.
 749   //
 750   // Be careful also to use only explicitly-sized types. The NaCl environment
 751   // could be 64-bit and the host browser could be 32-bits. The nested message
 752   // may or may not be safe to send between 32-bit and 64-bit systems, but we
 753   // leave that up to the code sending the message to ensure.
 754   m->WriteUInt32(static_cast<uint32>(p.routing_id()));
 755   m->WriteUInt32(p.type());
 756   m->WriteUInt32(p.flags());
 757   m->WriteData(p.payload(), static_cast<uint32>(p.payload_size()));
 758 }
 759
 760 bool ParamTraits<Message>::Read(const Message* m, PickleIterator* iter,
 761                                 Message* r) {
 762   uint32 routing_id, type, flags;
 763   if (!m->ReadUInt32(iter, &routing_id) ||
 764       !m->ReadUInt32(iter, &type) ||
 765       !m->ReadUInt32(iter, &flags))
 766     return false;
 767
 768   int payload_size;
 769   const char* payload;
 770   if (!m->ReadData(iter, &payload, &payload_size))
 771     return false;
 772
 773   r->SetHeaderValues(static_cast<int32>(routing_id), type, flags);
 774   return r->WriteBytes(payload, payload_size);
 775 }
 776
 777 void ParamTraits<Message>::Log(const Message& p, std::string* l) {
 778   l->append("<IPC::Message>");
 779 }
 780
 781 #if defined(OS_WIN)
 782 // Note that HWNDs/HANDLE/HCURSOR/HACCEL etc are always 32 bits, even on 64
 783 // bit systems.
 784 void ParamTraits<HANDLE>::Write(Message* m, const param_type& p) {
 785   m->WriteUInt32(reinterpret_cast<uint32>(p));
 786 }
 787
 788 bool ParamTraits<HANDLE>::Read(const Message* m, PickleIterator* iter,
 789                                param_type* r) {
 790   uint32 temp;
 791   if (!m->ReadUInt32(iter, &temp))
 792     return false;
 793   *r = reinterpret_cast<HANDLE>(temp);
 794   return true;
 795 }
 796
 797 void ParamTraits<HANDLE>::Log(const param_type& p, std::string* l) {
 798   l->append(StringPrintf("0x%X", p));
 799 }
 800
 801 void ParamTraits<LOGFONT>::Write(Message* m, const param_type& p) {
 802   m->WriteData(reinterpret_cast<const char*>(&p), sizeof(LOGFONT));
 803 }
 804
 805 bool ParamTraits<LOGFONT>::Read(const Message* m, PickleIterator* iter,
 806                                 param_type* r) {
 807   const char *data;
 808   int data_size = 0;
 809   bool result = m->ReadData(iter, &data, &data_size);
 810   if (result && data_size == sizeof(LOGFONT)) {
 811     memcpy(r, data, sizeof(LOGFONT));
 812   } else {
 813     result = false;
 814     NOTREACHED();
 815   }
 816
 817   return result;
 818 }
 819
 820 void ParamTraits<LOGFONT>::Log(const param_type& p, std::string* l) {
 821   l->append(StringPrintf("<LOGFONT>"));
 822 }
 823
 824 void ParamTraits<MSG>::Write(Message* m, const param_type& p) {
 825   m->WriteData(reinterpret_cast<const char*>(&p), sizeof(MSG));
 826 }
 827
 828 bool ParamTraits<MSG>::Read(const Message* m, PickleIterator* iter,
 829                             param_type* r) {
 830   const char *data;
 831   int data_size = 0;
 832   bool result = m->ReadData(iter, &data, &data_size);
 833   if (result && data_size == sizeof(MSG)) {
 834     memcpy(r, data, sizeof(MSG));
 835   } else {
 836     result = false;
 837     NOTREACHED();
 838   }
 839
 840   return result;
 841 }
 842
 843 void ParamTraits<MSG>::Log(const param_type& p, std::string* l) {
 844   l->append("<MSG>");
 845 }
 846
 847 #endif  // OS_WIN
 848
 849 }  // namespace IPC