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| 1 // Copyright (c) 2010 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 "chrome/browser/renderer_host/render_sandbox_host_linux.h" | |
| 6 | |
| 7 #include <fcntl.h> | |
| 8 #include <fontconfig/fontconfig.h> | |
| 9 #include <stdint.h> | |
| 10 #include <unistd.h> | |
| 11 #include <sys/uio.h> | |
| 12 #include <sys/stat.h> | |
| 13 #include <sys/socket.h> | |
| 14 #include <sys/poll.h> | |
| 15 #include <time.h> | |
| 16 | |
| 17 #include <vector> | |
| 18 | |
| 19 #include "base/command_line.h" | |
| 20 #include "base/eintr_wrapper.h" | |
| 21 #include "base/linux_util.h" | |
| 22 #include "base/pickle.h" | |
| 23 #include "base/process_util.h" | |
| 24 #include "base/scoped_ptr.h" | |
| 25 #include "base/shared_memory.h" | |
| 26 #include "base/singleton.h" | |
| 27 #include "base/string_number_conversions.h" | |
| 28 #include "base/string_util.h" | |
| 29 #include "chrome/common/font_config_ipc_linux.h" | |
| 30 #include "chrome/common/sandbox_methods_linux.h" | |
| 31 #include "chrome/common/unix_domain_socket_posix.h" | |
| 32 #include "skia/ext/SkFontHost_fontconfig_direct.h" | |
| 33 #include "third_party/npapi/bindings/npapi_extensions.h" | |
| 34 #include "third_party/WebKit/Source/WebKit/chromium/public/gtk/WebFontInfo.h" | |
| 35 | |
| 36 using WebKit::WebCString; | |
| 37 using WebKit::WebFontInfo; | |
| 38 using WebKit::WebUChar; | |
| 39 | |
| 40 // http://code.google.com/p/chromium/wiki/LinuxSandboxIPC | |
| 41 | |
| 42 // BEWARE: code in this file run across *processes* (not just threads). | |
| 43 | |
| 44 // This code runs in a child process | |
| 45 class SandboxIPCProcess { | |
| 46 public: | |
| 47 // lifeline_fd: this is the read end of a pipe which the browser process | |
| 48 // holds the other end of. If the browser process dies, its descriptors are | |
| 49 // closed and we will noticed an EOF on the pipe. That's our signal to exit. | |
| 50 // browser_socket: the browser's end of the sandbox IPC socketpair. From the | |
| 51 // point of view of the renderer, it's talking to the browser but this | |
| 52 // object actually services the requests. | |
| 53 // sandbox_cmd: the path of the sandbox executable | |
| 54 SandboxIPCProcess(int lifeline_fd, int browser_socket, | |
| 55 std::string sandbox_cmd) | |
| 56 : lifeline_fd_(lifeline_fd), | |
| 57 browser_socket_(browser_socket), | |
| 58 font_config_(new FontConfigDirect()) { | |
| 59 base::InjectiveMultimap multimap; | |
| 60 multimap.push_back(base::InjectionArc(0, lifeline_fd, false)); | |
| 61 multimap.push_back(base::InjectionArc(0, browser_socket, false)); | |
| 62 | |
| 63 base::CloseSuperfluousFds(multimap); | |
| 64 | |
| 65 if (!sandbox_cmd.empty()) { | |
| 66 sandbox_cmd_.push_back(sandbox_cmd); | |
| 67 sandbox_cmd_.push_back(base::kFindInodeSwitch); | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 void Run() { | |
| 72 struct pollfd pfds[2]; | |
| 73 pfds[0].fd = lifeline_fd_; | |
| 74 pfds[0].events = POLLIN; | |
| 75 pfds[1].fd = browser_socket_; | |
| 76 pfds[1].events = POLLIN; | |
| 77 | |
| 78 int failed_polls = 0; | |
| 79 for (;;) { | |
| 80 const int r = HANDLE_EINTR(poll(pfds, 2, -1)); | |
| 81 if (r < 1) { | |
| 82 LOG(WARNING) << "poll errno:" << errno; | |
| 83 if (failed_polls++ == 3) { | |
| 84 LOG(FATAL) << "poll failing. Sandbox host aborting."; | |
| 85 return; | |
| 86 } | |
| 87 continue; | |
| 88 } | |
| 89 | |
| 90 failed_polls = 0; | |
| 91 | |
| 92 if (pfds[0].revents) { | |
| 93 // our parent died so we should too. | |
| 94 _exit(0); | |
| 95 } | |
| 96 | |
| 97 if (pfds[1].revents) { | |
| 98 HandleRequestFromRenderer(browser_socket_); | |
| 99 } | |
| 100 } | |
| 101 } | |
| 102 | |
| 103 private: | |
| 104 // --------------------------------------------------------------------------- | |
| 105 // Requests from the renderer... | |
| 106 | |
| 107 void HandleRequestFromRenderer(int fd) { | |
| 108 std::vector<int> fds; | |
| 109 | |
| 110 // A FontConfigIPC::METHOD_MATCH message could be kMaxFontFamilyLength | |
| 111 // bytes long (this is the largest message type). | |
| 112 // 128 bytes padding are necessary so recvmsg() does not return MSG_TRUNC | |
| 113 // error for a maximum length message. | |
| 114 char buf[FontConfigInterface::kMaxFontFamilyLength + 128]; | |
| 115 | |
| 116 const ssize_t len = UnixDomainSocket::RecvMsg(fd, buf, sizeof(buf), &fds); | |
| 117 if (len == -1) { | |
| 118 // TODO: should send an error reply, or the sender might block forever. | |
| 119 NOTREACHED() | |
| 120 << "Sandbox host message is larger than kMaxFontFamilyLength"; | |
| 121 return; | |
| 122 } | |
| 123 if (fds.size() == 0) | |
| 124 return; | |
| 125 | |
| 126 Pickle pickle(buf, len); | |
| 127 void* iter = NULL; | |
| 128 | |
| 129 int kind; | |
| 130 if (!pickle.ReadInt(&iter, &kind)) | |
| 131 goto error; | |
| 132 | |
| 133 if (kind == FontConfigIPC::METHOD_MATCH) { | |
| 134 HandleFontMatchRequest(fd, pickle, iter, fds); | |
| 135 } else if (kind == FontConfigIPC::METHOD_OPEN) { | |
| 136 HandleFontOpenRequest(fd, pickle, iter, fds); | |
| 137 } else if (kind == LinuxSandbox::METHOD_GET_FONT_FAMILY_FOR_CHARS) { | |
| 138 HandleGetFontFamilyForChars(fd, pickle, iter, fds); | |
| 139 } else if (kind == LinuxSandbox::METHOD_LOCALTIME) { | |
| 140 HandleLocaltime(fd, pickle, iter, fds); | |
| 141 } else if (kind == LinuxSandbox::METHOD_GET_CHILD_WITH_INODE) { | |
| 142 HandleGetChildWithInode(fd, pickle, iter, fds); | |
| 143 } else if (kind == LinuxSandbox::METHOD_GET_STYLE_FOR_STRIKE) { | |
| 144 HandleGetStyleForStrike(fd, pickle, iter, fds); | |
| 145 } else if (kind == LinuxSandbox::METHOD_MAKE_SHARED_MEMORY_SEGMENT) { | |
| 146 HandleMakeSharedMemorySegment(fd, pickle, iter, fds); | |
| 147 } else if (kind == LinuxSandbox::METHOD_MATCH_WITH_FALLBACK) { | |
| 148 HandleMatchWithFallback(fd, pickle, iter, fds); | |
| 149 } | |
| 150 | |
| 151 error: | |
| 152 for (std::vector<int>::const_iterator | |
| 153 i = fds.begin(); i != fds.end(); ++i) { | |
| 154 close(*i); | |
| 155 } | |
| 156 } | |
| 157 | |
| 158 void HandleFontMatchRequest(int fd, const Pickle& pickle, void* iter, | |
| 159 std::vector<int>& fds) { | |
| 160 bool filefaceid_valid; | |
| 161 uint32_t filefaceid; | |
| 162 | |
| 163 if (!pickle.ReadBool(&iter, &filefaceid_valid)) | |
| 164 return; | |
| 165 if (filefaceid_valid) { | |
| 166 if (!pickle.ReadUInt32(&iter, &filefaceid)) | |
| 167 return; | |
| 168 } | |
| 169 bool is_bold, is_italic; | |
| 170 if (!pickle.ReadBool(&iter, &is_bold) || | |
| 171 !pickle.ReadBool(&iter, &is_italic)) { | |
| 172 return; | |
| 173 } | |
| 174 | |
| 175 uint32_t characters_bytes; | |
| 176 if (!pickle.ReadUInt32(&iter, &characters_bytes)) | |
| 177 return; | |
| 178 const char* characters = NULL; | |
| 179 if (characters_bytes > 0) { | |
| 180 const uint32_t kMaxCharactersBytes = 1 << 10; | |
| 181 if (characters_bytes % 2 != 0 || // We expect UTF-16. | |
| 182 characters_bytes > kMaxCharactersBytes || | |
| 183 !pickle.ReadBytes(&iter, &characters, characters_bytes)) | |
| 184 return; | |
| 185 } | |
| 186 | |
| 187 std::string family; | |
| 188 if (!pickle.ReadString(&iter, &family)) | |
| 189 return; | |
| 190 | |
| 191 std::string result_family; | |
| 192 unsigned result_filefaceid; | |
| 193 const bool r = font_config_->Match( | |
| 194 &result_family, &result_filefaceid, filefaceid_valid, filefaceid, | |
| 195 family, characters, characters_bytes, &is_bold, &is_italic); | |
| 196 | |
| 197 Pickle reply; | |
| 198 if (!r) { | |
| 199 reply.WriteBool(false); | |
| 200 } else { | |
| 201 reply.WriteBool(true); | |
| 202 reply.WriteUInt32(result_filefaceid); | |
| 203 reply.WriteString(result_family); | |
| 204 reply.WriteBool(is_bold); | |
| 205 reply.WriteBool(is_italic); | |
| 206 } | |
| 207 SendRendererReply(fds, reply, -1); | |
| 208 } | |
| 209 | |
| 210 void HandleFontOpenRequest(int fd, const Pickle& pickle, void* iter, | |
| 211 std::vector<int>& fds) { | |
| 212 uint32_t filefaceid; | |
| 213 if (!pickle.ReadUInt32(&iter, &filefaceid)) | |
| 214 return; | |
| 215 const int result_fd = font_config_->Open(filefaceid); | |
| 216 | |
| 217 Pickle reply; | |
| 218 if (result_fd == -1) { | |
| 219 reply.WriteBool(false); | |
| 220 } else { | |
| 221 reply.WriteBool(true); | |
| 222 } | |
| 223 | |
| 224 SendRendererReply(fds, reply, result_fd); | |
| 225 | |
| 226 if (result_fd >= 0) | |
| 227 close(result_fd); | |
| 228 } | |
| 229 | |
| 230 void HandleGetFontFamilyForChars(int fd, const Pickle& pickle, void* iter, | |
| 231 std::vector<int>& fds) { | |
| 232 // The other side of this call is | |
| 233 // chrome/renderer/renderer_sandbox_support_linux.cc | |
| 234 | |
| 235 int num_chars; | |
| 236 if (!pickle.ReadInt(&iter, &num_chars)) | |
| 237 return; | |
| 238 | |
| 239 // We don't want a corrupt renderer asking too much of us, it might | |
| 240 // overflow later in the code. | |
| 241 static const int kMaxChars = 4096; | |
| 242 if (num_chars < 1 || num_chars > kMaxChars) { | |
| 243 LOG(WARNING) << "HandleGetFontFamilyForChars: too many chars: " | |
| 244 << num_chars; | |
| 245 return; | |
| 246 } | |
| 247 | |
| 248 scoped_array<WebUChar> chars(new WebUChar[num_chars]); | |
| 249 | |
| 250 for (int i = 0; i < num_chars; ++i) { | |
| 251 uint32_t c; | |
| 252 if (!pickle.ReadUInt32(&iter, &c)) { | |
| 253 return; | |
| 254 } | |
| 255 | |
| 256 chars[i] = c; | |
| 257 } | |
| 258 | |
| 259 WebCString family = WebFontInfo::familyForChars(chars.get(), num_chars); | |
| 260 | |
| 261 Pickle reply; | |
| 262 if (family.data()) { | |
| 263 reply.WriteString(family.data()); | |
| 264 } else { | |
| 265 reply.WriteString(""); | |
| 266 } | |
| 267 SendRendererReply(fds, reply, -1); | |
| 268 } | |
| 269 | |
| 270 void HandleGetStyleForStrike(int fd, const Pickle& pickle, void* iter, | |
| 271 std::vector<int>& fds) { | |
| 272 std::string family; | |
| 273 int sizeAndStyle; | |
| 274 | |
| 275 if (!pickle.ReadString(&iter, &family) || | |
| 276 !pickle.ReadInt(&iter, &sizeAndStyle)) { | |
| 277 return; | |
| 278 } | |
| 279 | |
| 280 WebKit::WebFontRenderStyle style; | |
| 281 WebFontInfo::renderStyleForStrike(family.c_str(), sizeAndStyle, &style); | |
| 282 | |
| 283 Pickle reply; | |
| 284 reply.WriteInt(style.useBitmaps); | |
| 285 reply.WriteInt(style.useAutoHint); | |
| 286 reply.WriteInt(style.useHinting); | |
| 287 reply.WriteInt(style.hintStyle); | |
| 288 reply.WriteInt(style.useAntiAlias); | |
| 289 reply.WriteInt(style.useSubpixel); | |
| 290 | |
| 291 SendRendererReply(fds, reply, -1); | |
| 292 } | |
| 293 | |
| 294 void HandleLocaltime(int fd, const Pickle& pickle, void* iter, | |
| 295 std::vector<int>& fds) { | |
| 296 // The other side of this call is in zygote_main_linux.cc | |
| 297 | |
| 298 std::string time_string; | |
| 299 if (!pickle.ReadString(&iter, &time_string) || | |
| 300 time_string.size() != sizeof(time_t)) { | |
| 301 return; | |
| 302 } | |
| 303 | |
| 304 time_t time; | |
| 305 memcpy(&time, time_string.data(), sizeof(time)); | |
| 306 // We use localtime here because we need the tm_zone field to be filled | |
| 307 // out. Since we are a single-threaded process, this is safe. | |
| 308 const struct tm* expanded_time = localtime(&time); | |
| 309 | |
| 310 std::string result_string; | |
| 311 const char* time_zone_string = ""; | |
| 312 if (expanded_time != NULL) { | |
| 313 result_string = std::string(reinterpret_cast<const char*>(expanded_time), | |
| 314 sizeof(struct tm)); | |
| 315 time_zone_string = expanded_time->tm_zone; | |
| 316 } | |
| 317 | |
| 318 Pickle reply; | |
| 319 reply.WriteString(result_string); | |
| 320 reply.WriteString(time_zone_string); | |
| 321 SendRendererReply(fds, reply, -1); | |
| 322 } | |
| 323 | |
| 324 void HandleGetChildWithInode(int fd, const Pickle& pickle, void* iter, | |
| 325 std::vector<int>& fds) { | |
| 326 // The other side of this call is in zygote_main_linux.cc | |
| 327 if (sandbox_cmd_.empty()) { | |
| 328 LOG(ERROR) << "Not in the sandbox, this should not be called"; | |
| 329 return; | |
| 330 } | |
| 331 | |
| 332 uint64_t inode; | |
| 333 if (!pickle.ReadUInt64(&iter, &inode)) | |
| 334 return; | |
| 335 | |
| 336 base::ProcessId pid = 0; | |
| 337 std::string inode_output; | |
| 338 | |
| 339 std::vector<std::string> sandbox_cmd = sandbox_cmd_; | |
| 340 sandbox_cmd.push_back(base::Int64ToString(inode)); | |
| 341 CommandLine get_inode_cmd(sandbox_cmd); | |
| 342 if (base::GetAppOutput(get_inode_cmd, &inode_output)) | |
| 343 base::StringToInt(inode_output, &pid); | |
| 344 | |
| 345 if (!pid) { | |
| 346 // Even though the pid is invalid, we still need to reply to the zygote | |
| 347 // and not just return here. | |
| 348 LOG(ERROR) << "Could not get pid"; | |
| 349 } | |
| 350 | |
| 351 Pickle reply; | |
| 352 reply.WriteInt(pid); | |
| 353 SendRendererReply(fds, reply, -1); | |
| 354 } | |
| 355 | |
| 356 void HandleMakeSharedMemorySegment(int fd, const Pickle& pickle, void* iter, | |
| 357 std::vector<int>& fds) { | |
| 358 uint32_t shm_size; | |
| 359 if (!pickle.ReadUInt32(&iter, &shm_size)) | |
| 360 return; | |
| 361 int shm_fd = -1; | |
| 362 base::SharedMemory shm; | |
| 363 if (shm.CreateAnonymous(shm_size)) | |
| 364 shm_fd = shm.handle().fd; | |
| 365 Pickle reply; | |
| 366 SendRendererReply(fds, reply, shm_fd); | |
| 367 } | |
| 368 | |
| 369 void HandleMatchWithFallback(int fd, const Pickle& pickle, void* iter, | |
| 370 std::vector<int>& fds) { | |
| 371 // Unlike the other calls, for which we are an indirection in front of | |
| 372 // WebKit or Skia, this call is always made via this sandbox helper | |
| 373 // process. Therefore the fontconfig code goes in here directly. | |
| 374 | |
| 375 std::string face; | |
| 376 bool is_bold, is_italic; | |
| 377 uint32 charset; | |
| 378 | |
| 379 if (!pickle.ReadString(&iter, &face) || | |
| 380 face.empty() || | |
| 381 !pickle.ReadBool(&iter, &is_bold) || | |
| 382 !pickle.ReadBool(&iter, &is_italic) || | |
| 383 !pickle.ReadUInt32(&iter, &charset)) { | |
| 384 return; | |
| 385 } | |
| 386 | |
| 387 FcLangSet* langset = FcLangSetCreate(); | |
| 388 MSCharSetToFontconfig(langset, charset); | |
| 389 | |
| 390 FcPattern* pattern = FcPatternCreate(); | |
| 391 // TODO(agl): FC_FAMILy needs to change | |
| 392 FcPatternAddString(pattern, FC_FAMILY, (FcChar8*) face.c_str()); | |
| 393 if (is_bold) | |
| 394 FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD); | |
| 395 if (is_italic) | |
| 396 FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC); | |
| 397 FcPatternAddLangSet(pattern, FC_LANG, langset); | |
| 398 FcPatternAddBool(pattern, FC_SCALABLE, FcTrue); | |
| 399 FcConfigSubstitute(NULL, pattern, FcMatchPattern); | |
| 400 FcDefaultSubstitute(pattern); | |
| 401 | |
| 402 FcResult result; | |
| 403 FcFontSet* font_set = FcFontSort(0, pattern, 0, 0, &result); | |
| 404 int font_fd = -1; | |
| 405 int good_enough_index = -1; | |
| 406 bool good_enough_index_set = false; | |
| 407 | |
| 408 if (font_set) { | |
| 409 for (int i = 0; i < font_set->nfont; ++i) { | |
| 410 FcPattern* current = font_set->fonts[i]; | |
| 411 | |
| 412 // Older versions of fontconfig have a bug where they cannot select | |
| 413 // only scalable fonts so we have to manually filter the results. | |
| 414 FcBool is_scalable; | |
| 415 if (FcPatternGetBool(current, FC_SCALABLE, 0, | |
| 416 &is_scalable) != FcResultMatch || | |
| 417 !is_scalable) { | |
| 418 continue; | |
| 419 } | |
| 420 | |
| 421 FcChar8* c_filename; | |
| 422 if (FcPatternGetString(current, FC_FILE, 0, &c_filename) != | |
| 423 FcResultMatch) { | |
| 424 continue; | |
| 425 } | |
| 426 | |
| 427 // We only want to return sfnt (TrueType) based fonts. We don't have a | |
| 428 // very good way of detecting this so we'll filter based on the | |
| 429 // filename. | |
| 430 bool is_sfnt = false; | |
| 431 static const char kSFNTExtensions[][5] = { | |
| 432 ".ttf", ".otc", ".TTF", ".ttc", "" | |
| 433 }; | |
| 434 const size_t filename_len = strlen(reinterpret_cast<char*>(c_filename)); | |
| 435 for (unsigned j = 0; ; j++) { | |
| 436 if (kSFNTExtensions[j][0] == 0) { | |
| 437 // None of the extensions matched. | |
| 438 break; | |
| 439 } | |
| 440 const size_t ext_len = strlen(kSFNTExtensions[j]); | |
| 441 if (filename_len > ext_len && | |
| 442 memcmp(c_filename + filename_len - ext_len, | |
| 443 kSFNTExtensions[j], ext_len) == 0) { | |
| 444 is_sfnt = true; | |
| 445 break; | |
| 446 } | |
| 447 } | |
| 448 | |
| 449 if (!is_sfnt) | |
| 450 continue; | |
| 451 | |
| 452 // This font is good enough to pass muster, but we might be able to do | |
| 453 // better with subsequent ones. | |
| 454 if (!good_enough_index_set) { | |
| 455 good_enough_index = i; | |
| 456 good_enough_index_set = true; | |
| 457 } | |
| 458 | |
| 459 FcValue matrix; | |
| 460 bool have_matrix = FcPatternGet(current, FC_MATRIX, 0, &matrix) == 0; | |
| 461 | |
| 462 if (is_italic && have_matrix) { | |
| 463 // we asked for an italic font, but fontconfig is giving us a | |
| 464 // non-italic font with a transformation matrix. | |
| 465 continue; | |
| 466 } | |
| 467 | |
| 468 FcValue embolden; | |
| 469 const bool have_embolden = | |
| 470 FcPatternGet(current, FC_EMBOLDEN, 0, &embolden) == 0; | |
| 471 | |
| 472 if (is_bold && have_embolden) { | |
| 473 // we asked for a bold font, but fontconfig gave us a non-bold font | |
| 474 // and asked us to apply fake bolding. | |
| 475 continue; | |
| 476 } | |
| 477 | |
| 478 font_fd = open(reinterpret_cast<char*>(c_filename), O_RDONLY); | |
| 479 if (font_fd >= 0) | |
| 480 break; | |
| 481 } | |
| 482 } | |
| 483 | |
| 484 if (font_fd == -1 && good_enough_index_set) { | |
| 485 // We didn't find a font that we liked, so we fallback to something | |
| 486 // acceptable. | |
| 487 FcPattern* current = font_set->fonts[good_enough_index]; | |
| 488 FcChar8* c_filename; | |
| 489 FcPatternGetString(current, FC_FILE, 0, &c_filename); | |
| 490 font_fd = open(reinterpret_cast<char*>(c_filename), O_RDONLY); | |
| 491 } | |
| 492 | |
| 493 if (font_set) | |
| 494 FcFontSetDestroy(font_set); | |
| 495 FcPatternDestroy(pattern); | |
| 496 | |
| 497 Pickle reply; | |
| 498 SendRendererReply(fds, reply, font_fd); | |
| 499 | |
| 500 if (font_fd >= 0) { | |
| 501 if (HANDLE_EINTR(close(font_fd)) < 0) | |
| 502 PLOG(ERROR) << "close"; | |
| 503 } | |
| 504 } | |
| 505 | |
| 506 // MSCharSetToFontconfig translates a Microsoft charset identifier to a | |
| 507 // fontconfig language set by appending to |langset|. | |
| 508 static void MSCharSetToFontconfig(FcLangSet* langset, unsigned fdwCharSet) { | |
| 509 // We have need to translate raw fdwCharSet values into terms that | |
| 510 // fontconfig can understand. (See the description of fdwCharSet in the MSDN | |
| 511 // documentation for CreateFont: | |
| 512 // http://msdn.microsoft.com/en-us/library/dd183499(VS.85).aspx ) | |
| 513 // | |
| 514 // Although the argument is /called/ 'charset', the actual values conflate | |
| 515 // character sets (which are sets of Unicode code points) and character | |
| 516 // encodings (which are algorithms for turning a series of bits into a | |
| 517 // series of code points.) Sometimes the values will name a language, | |
| 518 // sometimes they'll name an encoding. In the latter case I'm assuming that | |
| 519 // they mean the set of code points in the domain of that encoding. | |
| 520 // | |
| 521 // fontconfig deals with ISO 639-1 language codes: | |
| 522 // http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes | |
| 523 // | |
| 524 // So, for each of the documented fdwCharSet values I've had to take a | |
| 525 // guess at the set of ISO 639-1 languages intended. | |
| 526 | |
| 527 switch (fdwCharSet) { | |
| 528 case NPCharsetAnsi: | |
| 529 // These values I don't really know what to do with, so I'm going to map | |
| 530 // them to English also. | |
| 531 case NPCharsetDefault: | |
| 532 case NPCharsetMac: | |
| 533 case NPCharsetOEM: | |
| 534 case NPCharsetSymbol: | |
| 535 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("en")); | |
| 536 break; | |
| 537 case NPCharsetBaltic: | |
| 538 // The three baltic languages. | |
| 539 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("et")); | |
| 540 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("lv")); | |
| 541 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("lt")); | |
| 542 break; | |
| 543 // TODO(jungshik): Would we be better off mapping Big5 to zh-tw | |
| 544 // and GB2312 to zh-cn? Fontconfig has 4 separate orthography | |
| 545 // files (zh-{cn,tw,hk,mo}. | |
| 546 case NPCharsetChineseBIG5: | |
| 547 case NPCharsetGB2312: | |
| 548 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("zh")); | |
| 549 break; | |
| 550 case NPCharsetEastEurope: | |
| 551 // A scattering of eastern European languages. | |
| 552 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("pl")); | |
| 553 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("cs")); | |
| 554 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("sk")); | |
| 555 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("hu")); | |
| 556 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("hr")); | |
| 557 break; | |
| 558 case NPCharsetGreek: | |
| 559 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("el")); | |
| 560 break; | |
| 561 case NPCharsetHangul: | |
| 562 case NPCharsetJohab: | |
| 563 // Korean | |
| 564 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("ko")); | |
| 565 break; | |
| 566 case NPCharsetRussian: | |
| 567 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("ru")); | |
| 568 break; | |
| 569 case NPCharsetShiftJIS: | |
| 570 // Japanese | |
| 571 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("ja")); | |
| 572 break; | |
| 573 case NPCharsetTurkish: | |
| 574 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("tr")); | |
| 575 break; | |
| 576 case NPCharsetVietnamese: | |
| 577 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("vi")); | |
| 578 break; | |
| 579 case NPCharsetArabic: | |
| 580 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("ar")); | |
| 581 break; | |
| 582 case NPCharsetHebrew: | |
| 583 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("he")); | |
| 584 break; | |
| 585 case NPCharsetThai: | |
| 586 FcLangSetAdd(langset, reinterpret_cast<const FcChar8*>("th")); | |
| 587 break; | |
| 588 // default: | |
| 589 // Don't add any languages in that case that we don't recognise the | |
| 590 // constant. | |
| 591 } | |
| 592 } | |
| 593 | |
| 594 void SendRendererReply(const std::vector<int>& fds, const Pickle& reply, | |
| 595 int reply_fd) { | |
| 596 struct msghdr msg; | |
| 597 memset(&msg, 0, sizeof(msg)); | |
| 598 struct iovec iov = {const_cast<void*>(reply.data()), reply.size()}; | |
| 599 msg.msg_iov = &iov; | |
| 600 msg.msg_iovlen = 1; | |
| 601 | |
| 602 char control_buffer[CMSG_SPACE(sizeof(int))]; | |
| 603 | |
| 604 if (reply_fd != -1) { | |
| 605 struct stat st; | |
| 606 if (fstat(reply_fd, &st) == 0 && S_ISDIR(st.st_mode)) { | |
| 607 LOG(FATAL) << "Tried to send a directory descriptor over sandbox IPC"; | |
| 608 // We must never send directory descriptors to a sandboxed process | |
| 609 // because they can use openat with ".." elements in the path in order | |
| 610 // to escape the sandbox and reach the real filesystem. | |
| 611 } | |
| 612 | |
| 613 struct cmsghdr *cmsg; | |
| 614 msg.msg_control = control_buffer; | |
| 615 msg.msg_controllen = sizeof(control_buffer); | |
| 616 cmsg = CMSG_FIRSTHDR(&msg); | |
| 617 cmsg->cmsg_level = SOL_SOCKET; | |
| 618 cmsg->cmsg_type = SCM_RIGHTS; | |
| 619 cmsg->cmsg_len = CMSG_LEN(sizeof(int)); | |
| 620 memcpy(CMSG_DATA(cmsg), &reply_fd, sizeof(reply_fd)); | |
| 621 msg.msg_controllen = cmsg->cmsg_len; | |
| 622 } | |
| 623 | |
| 624 if (HANDLE_EINTR(sendmsg(fds[0], &msg, MSG_DONTWAIT)) < 0) | |
| 625 PLOG(ERROR) << "sendmsg"; | |
| 626 } | |
| 627 | |
| 628 // --------------------------------------------------------------------------- | |
| 629 | |
| 630 const int lifeline_fd_; | |
| 631 const int browser_socket_; | |
| 632 FontConfigDirect* const font_config_; | |
| 633 std::vector<std::string> sandbox_cmd_; | |
| 634 }; | |
| 635 | |
| 636 // ----------------------------------------------------------------------------- | |
| 637 | |
| 638 // Runs on the main thread at startup. | |
| 639 RenderSandboxHostLinux::RenderSandboxHostLinux() | |
| 640 : initialized_(false), | |
| 641 renderer_socket_(0), | |
| 642 childs_lifeline_fd_(0), | |
| 643 pid_(0) { | |
| 644 } | |
| 645 | |
| 646 // static | |
| 647 RenderSandboxHostLinux* RenderSandboxHostLinux::GetInstance() { | |
| 648 return Singleton<RenderSandboxHostLinux>::get(); | |
| 649 } | |
| 650 | |
| 651 void RenderSandboxHostLinux::Init(const std::string& sandbox_path) { | |
| 652 DCHECK(!initialized_); | |
| 653 initialized_ = true; | |
| 654 | |
| 655 int fds[2]; | |
| 656 // We use SOCK_SEQPACKET rather than SOCK_DGRAM to prevent the renderer from | |
| 657 // sending datagrams to other sockets on the system. The sandbox may prevent | |
| 658 // the renderer from calling socket() to create new sockets, but it'll still | |
| 659 // inherit some sockets. With PF_UNIX+SOCK_DGRAM, it can call sendmsg to send | |
| 660 // a datagram to any (abstract) socket on the same system. With | |
| 661 // SOCK_SEQPACKET, this is prevented. | |
| 662 CHECK(socketpair(AF_UNIX, SOCK_SEQPACKET, 0, fds) == 0); | |
| 663 | |
| 664 renderer_socket_ = fds[0]; | |
| 665 const int browser_socket = fds[1]; | |
| 666 | |
| 667 int pipefds[2]; | |
| 668 CHECK(0 == pipe(pipefds)); | |
| 669 const int child_lifeline_fd = pipefds[0]; | |
| 670 childs_lifeline_fd_ = pipefds[1]; | |
| 671 | |
| 672 pid_ = fork(); | |
| 673 if (pid_ == 0) { | |
| 674 SandboxIPCProcess handler(child_lifeline_fd, browser_socket, sandbox_path); | |
| 675 handler.Run(); | |
| 676 _exit(0); | |
| 677 } | |
| 678 } | |
| 679 | |
| 680 RenderSandboxHostLinux::~RenderSandboxHostLinux() { | |
| 681 if (initialized_) { | |
| 682 if (HANDLE_EINTR(close(renderer_socket_)) < 0) | |
| 683 PLOG(ERROR) << "close"; | |
| 684 if (HANDLE_EINTR(close(childs_lifeline_fd_)) < 0) | |
| 685 PLOG(ERROR) << "close"; | |
| 686 } | |
| 687 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 6532073:
Move core pieces of browser\renderer_host to src\content. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/