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