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1 /* | |
2 * libjingle | |
3 * Copyright 2004--2005, Google Inc. | |
4 * | |
5 * Redistribution and use in source and binary forms, with or without | |
6 * modification, are permitted provided that the following conditions are met: | |
7 * | |
8 * 1. Redistributions of source code must retain the above copyright notice, | |
9 * this list of conditions and the following disclaimer. | |
10 * 2. Redistributions in binary form must reproduce the above copyright notice, | |
11 * this list of conditions and the following disclaimer in the documentation | |
12 * and/or other materials provided with the distribution. | |
13 * 3. The name of the author may not be used to endorse or promote products | |
14 * derived from this software without specific prior written permission. | |
15 * | |
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | |
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
26 */ | |
27 | |
28 #include "talk/base/win32.h" | |
29 | |
30 #include <winsock2.h> | |
31 #include <ws2tcpip.h> | |
32 #include <algorithm> | |
33 | |
34 #include "talk/base/basictypes.h" | |
35 #include "talk/base/common.h" | |
36 #include "talk/base/logging.h" | |
37 | |
38 namespace talk_base { | |
39 | |
40 // Helper function declarations for inet_ntop/inet_pton. | |
41 static const char* inet_ntop_v4(const void* src, char* dst, socklen_t size); | |
42 static const char* inet_ntop_v6(const void* src, char* dst, socklen_t size); | |
43 static int inet_pton_v4(const char* src, void* dst); | |
44 static int inet_pton_v6(const char* src, void* dst); | |
45 | |
46 // Implementation of inet_ntop (create a printable representation of an | |
47 // ip address). XP doesn't have its own inet_ntop, and | |
48 // WSAAddressToString requires both IPv6 to be installed and for Winsock | |
49 // to be initialized. | |
50 const char* win32_inet_ntop(int af, const void *src, | |
51 char* dst, socklen_t size) { | |
52 if (!src || !dst) { | |
53 return NULL; | |
54 } | |
55 switch (af) { | |
56 case AF_INET: { | |
57 return inet_ntop_v4(src, dst, size); | |
58 } | |
59 case AF_INET6: { | |
60 return inet_ntop_v6(src, dst, size); | |
61 } | |
62 } | |
63 return NULL; | |
64 } | |
65 | |
66 // As above, but for inet_pton. Implements inet_pton for v4 and v6. | |
67 // Note that our inet_ntop will output normal 'dotted' v4 addresses only. | |
68 int win32_inet_pton(int af, const char* src, void* dst) { | |
69 if (!src || !dst) { | |
70 return 0; | |
71 } | |
72 if (af == AF_INET) { | |
73 return inet_pton_v4(src, dst); | |
74 } else if (af == AF_INET6) { | |
75 return inet_pton_v6(src, dst); | |
76 } | |
77 return -1; | |
78 } | |
79 | |
80 // Helper function for inet_ntop for IPv4 addresses. | |
81 // Outputs "dotted-quad" decimal notation. | |
82 const char* inet_ntop_v4(const void* src, char* dst, socklen_t size) { | |
83 if (size < INET_ADDRSTRLEN) { | |
84 return NULL; | |
85 } | |
86 const struct in_addr* as_in_addr = | |
87 reinterpret_cast<const struct in_addr*>(src); | |
88 talk_base::sprintfn(dst, size, "%d.%d.%d.%d", | |
89 as_in_addr->S_un.S_un_b.s_b1, | |
90 as_in_addr->S_un.S_un_b.s_b2, | |
91 as_in_addr->S_un.S_un_b.s_b3, | |
92 as_in_addr->S_un.S_un_b.s_b4); | |
93 return dst; | |
94 } | |
95 | |
96 // Helper function for inet_ntop for IPv6 addresses. | |
97 const char* inet_ntop_v6(const void* src, char* dst, socklen_t size) { | |
98 if (size < INET6_ADDRSTRLEN) { | |
99 return NULL; | |
100 } | |
101 const uint16* as_shorts = | |
102 reinterpret_cast<const uint16*>(src); | |
103 int runpos[8]; | |
104 int current = 1; | |
105 int max = 1; | |
106 int maxpos = -1; | |
107 int run_array_size = ARRAY_SIZE(runpos); | |
108 // Run over the address marking runs of 0s. | |
109 for (int i = 0; i < run_array_size; ++i) { | |
110 if (as_shorts[i] == 0) { | |
111 runpos[i] = current; | |
112 if (current > max) { | |
113 maxpos = i; | |
114 max = current; | |
115 } | |
116 ++current; | |
117 } else { | |
118 runpos[i] = -1; | |
119 current =1; | |
120 } | |
121 } | |
122 | |
123 if (max > 1) { | |
124 int tmpmax = maxpos; | |
125 // Run back through, setting -1 for all but the longest run. | |
126 for (int i = run_array_size - 1; i >= 0; i--) { | |
127 if (i > tmpmax) { | |
128 runpos[i] = -1; | |
129 } else if (runpos[i] == -1) { | |
130 // We're less than maxpos, we hit a -1, so the 'good' run is done. | |
131 // Setting tmpmax -1 means all remaining positions get set to -1. | |
132 tmpmax = -1; | |
133 } | |
134 } | |
135 } | |
136 | |
137 char* cursor = dst; | |
138 // Print IPv4 compatible and IPv4 mapped addresses using the IPv4 helper. | |
139 // These addresses have an initial run of either eight zero-bytes followed | |
140 // by 0xFFFF, or an initial run of ten zero-bytes. | |
141 if (runpos[0] == 1 && (maxpos == 5 || | |
142 (maxpos == 4 && as_shorts[5] == 0xFFFF))) { | |
143 *cursor++ = ':'; | |
144 *cursor++ = ':'; | |
145 if (maxpos == 4) { | |
146 cursor += talk_base::sprintfn(cursor, INET6_ADDRSTRLEN - 2, "ffff:"); | |
147 } | |
148 const struct in_addr* as_v4 = | |
149 reinterpret_cast<const struct in_addr*>(&(as_shorts[6])); | |
150 inet_ntop_v4(as_v4, cursor, (INET6_ADDRSTRLEN - (cursor - dst))); | |
151 } else { | |
152 for (int i = 0; i < run_array_size; ++i) { | |
153 if (runpos[i] == -1) { | |
154 cursor += talk_base::sprintfn(cursor, | |
155 INET6_ADDRSTRLEN - (cursor - dst), | |
156 "%x", ntohs(as_shorts[i])); | |
157 if (i != 7 && runpos[i + 1] != 1) { | |
158 *cursor++ = ':'; | |
159 } | |
160 } else if (runpos[i] == 1) { | |
161 // Entered the run; print the colons and skip the run. | |
162 *cursor++ = ':'; | |
163 *cursor++ = ':'; | |
164 i += (max - 1); | |
165 } | |
166 } | |
167 } | |
168 return dst; | |
169 } | |
170 | |
171 // Helper function for inet_pton for IPv4 addresses. | |
172 // |src| points to a character string containing an IPv4 network address in | |
173 // dotted-decimal format, "ddd.ddd.ddd.ddd", where ddd is a decimal number | |
174 // of up to three digits in the range 0 to 255. | |
175 // The address is converted and copied to dst, | |
176 // which must be sizeof(struct in_addr) (4) bytes (32 bits) long. | |
177 int inet_pton_v4(const char* src, void* dst) { | |
178 const int kIpv4AddressSize = 4; | |
179 int num_dot = 0; | |
180 const char* src_pos = src; | |
181 unsigned char result[kIpv4AddressSize] = {0}; | |
182 | |
183 while (*src_pos != 0) { | |
184 // strtol won't treat whitespace characters in the begining as an error, | |
185 // so check to ensure this is started with digit before passing to strtol. | |
186 if (!isdigit(*src_pos)) { | |
187 return 0; | |
188 } | |
189 char* end_pos; | |
190 long int value = strtol(src_pos, &end_pos, 10); | |
191 if (value < 0 || value > 255 || src_pos == end_pos) { | |
192 return 0; | |
193 } | |
194 result[num_dot] = value; | |
195 if (*end_pos == 0) { | |
196 break; | |
197 } | |
198 src_pos = end_pos; | |
199 if (*src_pos == '.') { | |
200 ++num_dot; | |
201 if (num_dot > kIpv4AddressSize - 1) { | |
202 return 0; | |
203 } | |
204 } | |
205 ++src_pos; | |
206 } | |
207 if (num_dot != kIpv4AddressSize - 1) { | |
208 return 0; | |
209 } | |
210 memcpy(dst, result, sizeof(result)); | |
211 return 1; | |
212 } | |
213 | |
214 // Helper function for inet_pton for IPv6 addresses. | |
215 int inet_pton_v6(const char* src, void* dst) { | |
216 // sscanf will pick any other invalid chars up, but it parses 0xnnnn as hex. | |
217 // Check for literal x in the input string. | |
218 const char* readcursor = src; | |
219 char c = *readcursor++; | |
220 while (c) { | |
221 if (c == 'x') { | |
222 return 0; | |
223 } | |
224 c = *readcursor++; | |
225 } | |
226 readcursor = src; | |
227 | |
228 struct in6_addr an_addr; | |
229 memset(&an_addr, 0, sizeof(an_addr)); | |
230 | |
231 uint16* addr_cursor = reinterpret_cast<uint16*>(&an_addr.s6_addr[0]); | |
232 uint16* addr_end = reinterpret_cast<uint16*>(&an_addr.s6_addr[16]); | |
233 bool seencompressed = false; | |
234 | |
235 // Addresses that start with "::" (i.e., a run of initial zeros) or | |
236 // "::ffff:" can potentially be IPv4 mapped or compatibility addresses. | |
237 // These have dotted-style IPv4 addresses on the end (e.g. "::192.168.7.1"). | |
238 if (*readcursor == ':' && *(readcursor+1) == ':' && | |
239 *(readcursor + 2) != 0) { | |
240 // Check for periods, which we'll take as a sign of v4 addresses. | |
241 const char* addrstart = readcursor + 2; | |
242 if (talk_base::strchr(addrstart, ".")) { | |
243 const char* colon = talk_base::strchr(addrstart, "::"); | |
244 if (colon) { | |
245 uint16 a_short; | |
246 int bytesread = 0; | |
247 if (sscanf(addrstart, "%hx%n", &a_short, &bytesread) != 1 || | |
248 a_short != 0xFFFF || bytesread != 4) { | |
249 // Colons + periods means has to be ::ffff:a.b.c.d. But it wasn't. | |
250 return 0; | |
251 } else { | |
252 an_addr.s6_addr[10] = 0xFF; | |
253 an_addr.s6_addr[11] = 0xFF; | |
254 addrstart = colon + 1; | |
255 } | |
256 } | |
257 struct in_addr v4; | |
258 if (inet_pton_v4(addrstart, &v4.s_addr)) { | |
259 memcpy(&an_addr.s6_addr[12], &v4, sizeof(v4)); | |
260 memcpy(dst, &an_addr, sizeof(an_addr)); | |
261 return 1; | |
262 } else { | |
263 // Invalid v4 address. | |
264 return 0; | |
265 } | |
266 } | |
267 } | |
268 | |
269 // For addresses without a trailing IPv4 component ('normal' IPv6 addresses). | |
270 while (*readcursor != 0 && addr_cursor < addr_end) { | |
271 if (*readcursor == ':') { | |
272 if (*(readcursor + 1) == ':') { | |
273 if (seencompressed) { | |
274 // Can only have one compressed run of zeroes ("::") per address. | |
275 return 0; | |
276 } | |
277 // Hit a compressed run. Count colons to figure out how much of the | |
278 // address is skipped. | |
279 readcursor += 2; | |
280 const char* coloncounter = readcursor; | |
281 int coloncount = 0; | |
282 if (*coloncounter == 0) { | |
283 // Special case - trailing ::. | |
284 addr_cursor = addr_end; | |
285 } else { | |
286 while (*coloncounter) { | |
287 if (*coloncounter == ':') { | |
288 ++coloncount; | |
289 } | |
290 ++coloncounter; | |
291 } | |
292 // (coloncount + 1) is the number of shorts left in the address. | |
293 addr_cursor = addr_end - (coloncount + 1); | |
294 seencompressed = true; | |
295 } | |
296 } else { | |
297 ++readcursor; | |
298 } | |
299 } else { | |
300 uint16 word; | |
301 int bytesread = 0; | |
302 if (sscanf(readcursor, "%hx%n", &word, &bytesread) != 1) { | |
303 return 0; | |
304 } else { | |
305 *addr_cursor = htons(word); | |
306 ++addr_cursor; | |
307 readcursor += bytesread; | |
308 if (*readcursor != ':' && *readcursor != '\0') { | |
309 return 0; | |
310 } | |
311 } | |
312 } | |
313 } | |
314 | |
315 if (*readcursor != '\0' || addr_cursor < addr_end) { | |
316 // Catches addresses too short or too long. | |
317 return 0; | |
318 } | |
319 memcpy(dst, &an_addr, sizeof(an_addr)); | |
320 return 1; | |
321 } | |
322 | |
323 // | |
324 // Unix time is in seconds relative to 1/1/1970. So we compute the windows | |
325 // FILETIME of that time/date, then we add/subtract in appropriate units to | |
326 // convert to/from unix time. | |
327 // The units of FILETIME are 100ns intervals, so by multiplying by or dividing | |
328 // by 10000000, we can convert to/from seconds. | |
329 // | |
330 // FileTime = UnixTime*10000000 + FileTime(1970) | |
331 // UnixTime = (FileTime-FileTime(1970))/10000000 | |
332 // | |
333 | |
334 void FileTimeToUnixTime(const FILETIME& ft, time_t* ut) { | |
335 ASSERT(NULL != ut); | |
336 | |
337 // FILETIME has an earlier date base than time_t (1/1/1970), so subtract off | |
338 // the difference. | |
339 SYSTEMTIME base_st; | |
340 memset(&base_st, 0, sizeof(base_st)); | |
341 base_st.wDay = 1; | |
342 base_st.wMonth = 1; | |
343 base_st.wYear = 1970; | |
344 | |
345 FILETIME base_ft; | |
346 SystemTimeToFileTime(&base_st, &base_ft); | |
347 | |
348 ULARGE_INTEGER base_ul, current_ul; | |
349 memcpy(&base_ul, &base_ft, sizeof(FILETIME)); | |
350 memcpy(¤t_ul, &ft, sizeof(FILETIME)); | |
351 | |
352 // Divide by big number to convert to seconds, then subtract out the 1970 | |
353 // base date value. | |
354 const ULONGLONG RATIO = 10000000; | |
355 *ut = static_cast<time_t>((current_ul.QuadPart - base_ul.QuadPart) / RATIO); | |
356 } | |
357 | |
358 void UnixTimeToFileTime(const time_t& ut, FILETIME* ft) { | |
359 ASSERT(NULL != ft); | |
360 | |
361 // FILETIME has an earlier date base than time_t (1/1/1970), so add in | |
362 // the difference. | |
363 SYSTEMTIME base_st; | |
364 memset(&base_st, 0, sizeof(base_st)); | |
365 base_st.wDay = 1; | |
366 base_st.wMonth = 1; | |
367 base_st.wYear = 1970; | |
368 | |
369 FILETIME base_ft; | |
370 SystemTimeToFileTime(&base_st, &base_ft); | |
371 | |
372 ULARGE_INTEGER base_ul; | |
373 memcpy(&base_ul, &base_ft, sizeof(FILETIME)); | |
374 | |
375 // Multiply by big number to convert to 100ns units, then add in the 1970 | |
376 // base date value. | |
377 const ULONGLONG RATIO = 10000000; | |
378 ULARGE_INTEGER current_ul; | |
379 current_ul.QuadPart = base_ul.QuadPart + static_cast<int64>(ut) * RATIO; | |
380 memcpy(ft, ¤t_ul, sizeof(FILETIME)); | |
381 } | |
382 | |
383 bool Utf8ToWindowsFilename(const std::string& utf8, std::wstring* filename) { | |
384 // TODO: Integrate into fileutils.h | |
385 // TODO: Handle wide and non-wide cases via TCHAR? | |
386 // TODO: Skip \\?\ processing if the length is not > MAX_PATH? | |
387 // TODO: Write unittests | |
388 | |
389 // Convert to Utf16 | |
390 int wlen = ::MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(), utf8.length() + 1, | |
391 NULL, 0); | |
392 if (0 == wlen) { | |
393 return false; | |
394 } | |
395 wchar_t* wfilename = STACK_ARRAY(wchar_t, wlen); | |
396 if (0 == ::MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(), utf8.length() + 1, | |
397 wfilename, wlen)) { | |
398 return false; | |
399 } | |
400 // Replace forward slashes with backslashes | |
401 std::replace(wfilename, wfilename + wlen, L'/', L'\\'); | |
402 // Convert to complete filename | |
403 DWORD full_len = ::GetFullPathName(wfilename, 0, NULL, NULL); | |
404 if (0 == full_len) { | |
405 return false; | |
406 } | |
407 wchar_t* filepart = NULL; | |
408 wchar_t* full_filename = STACK_ARRAY(wchar_t, full_len + 6); | |
409 wchar_t* start = full_filename + 6; | |
410 if (0 == ::GetFullPathName(wfilename, full_len, start, &filepart)) { | |
411 return false; | |
412 } | |
413 // Add long-path prefix | |
414 const wchar_t kLongPathPrefix[] = L"\\\\?\\UNC"; | |
415 if ((start[0] != L'\\') || (start[1] != L'\\')) { | |
416 // Non-unc path: <pathname> | |
417 // Becomes: \\?\<pathname> | |
418 start -= 4; | |
419 ASSERT(start >= full_filename); | |
420 memcpy(start, kLongPathPrefix, 4 * sizeof(wchar_t)); | |
421 } else if (start[2] != L'?') { | |
422 // Unc path: \\<server>\<pathname> | |
423 // Becomes: \\?\UNC\<server>\<pathname> | |
424 start -= 6; | |
425 ASSERT(start >= full_filename); | |
426 memcpy(start, kLongPathPrefix, 7 * sizeof(wchar_t)); | |
427 } else { | |
428 // Already in long-path form. | |
429 } | |
430 filename->assign(start); | |
431 return true; | |
432 } | |
433 | |
434 bool GetOsVersion(int* major, int* minor, int* build) { | |
435 OSVERSIONINFO info = {0}; | |
436 info.dwOSVersionInfoSize = sizeof(info); | |
437 if (GetVersionEx(&info)) { | |
438 if (major) *major = info.dwMajorVersion; | |
439 if (minor) *minor = info.dwMinorVersion; | |
440 if (build) *build = info.dwBuildNumber; | |
441 return true; | |
442 } | |
443 return false; | |
444 } | |
445 | |
446 bool GetCurrentProcessIntegrityLevel(int* level) { | |
447 bool ret = false; | |
448 HANDLE process = ::GetCurrentProcess(), token; | |
449 if (OpenProcessToken(process, TOKEN_QUERY | TOKEN_QUERY_SOURCE, &token)) { | |
450 DWORD size; | |
451 if (!GetTokenInformation(token, TokenIntegrityLevel, NULL, 0, &size) && | |
452 GetLastError() == ERROR_INSUFFICIENT_BUFFER) { | |
453 | |
454 char* buf = STACK_ARRAY(char, size); | |
455 TOKEN_MANDATORY_LABEL* til = | |
456 reinterpret_cast<TOKEN_MANDATORY_LABEL*>(buf); | |
457 if (GetTokenInformation(token, TokenIntegrityLevel, til, size, &size)) { | |
458 | |
459 DWORD count = *GetSidSubAuthorityCount(til->Label.Sid); | |
460 *level = *GetSidSubAuthority(til->Label.Sid, count - 1); | |
461 ret = true; | |
462 } | |
463 } | |
464 CloseHandle(token); | |
465 } | |
466 return ret; | |
467 } | |
468 } // namespace talk_base | |
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