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Unified Diff: webrtc/base/win32.cc

Issue 2877023002: Move webrtc/{base => rtc_base} (Closed)
Patch Set: update presubmit.py and DEPS include rules Created 3 years, 6 months ago
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Index: webrtc/base/win32.cc
diff --git a/webrtc/base/win32.cc b/webrtc/base/win32.cc
deleted file mode 100644
index 89970ec3a98004e956f5f4528d5e7729ba930b57..0000000000000000000000000000000000000000
--- a/webrtc/base/win32.cc
+++ /dev/null
@@ -1,461 +0,0 @@
-/*
- * Copyright 2004 The WebRTC Project Authors. All rights reserved.
- *
- * Use of this source code is governed by a BSD-style license
- * that can be found in the LICENSE file in the root of the source
- * tree. An additional intellectual property rights grant can be found
- * in the file PATENTS. All contributing project authors may
- * be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/base/win32.h"
-
-#include <winsock2.h>
-#include <ws2tcpip.h>
-#include <algorithm>
-
-#include "webrtc/base/arraysize.h"
-#include "webrtc/base/basictypes.h"
-#include "webrtc/base/byteorder.h"
-#include "webrtc/base/checks.h"
-#include "webrtc/base/logging.h"
-
-namespace rtc {
-
-// Helper function declarations for inet_ntop/inet_pton.
-static const char* inet_ntop_v4(const void* src, char* dst, socklen_t size);
-static const char* inet_ntop_v6(const void* src, char* dst, socklen_t size);
-static int inet_pton_v4(const char* src, void* dst);
-static int inet_pton_v6(const char* src, void* dst);
-
-// Implementation of inet_ntop (create a printable representation of an
-// ip address). XP doesn't have its own inet_ntop, and
-// WSAAddressToString requires both IPv6 to be installed and for Winsock
-// to be initialized.
-const char* win32_inet_ntop(int af, const void *src,
- char* dst, socklen_t size) {
- if (!src || !dst) {
- return nullptr;
- }
- switch (af) {
- case AF_INET: {
- return inet_ntop_v4(src, dst, size);
- }
- case AF_INET6: {
- return inet_ntop_v6(src, dst, size);
- }
- }
- return nullptr;
-}
-
-// As above, but for inet_pton. Implements inet_pton for v4 and v6.
-// Note that our inet_ntop will output normal 'dotted' v4 addresses only.
-int win32_inet_pton(int af, const char* src, void* dst) {
- if (!src || !dst) {
- return 0;
- }
- if (af == AF_INET) {
- return inet_pton_v4(src, dst);
- } else if (af == AF_INET6) {
- return inet_pton_v6(src, dst);
- }
- return -1;
-}
-
-// Helper function for inet_ntop for IPv4 addresses.
-// Outputs "dotted-quad" decimal notation.
-const char* inet_ntop_v4(const void* src, char* dst, socklen_t size) {
- if (size < INET_ADDRSTRLEN) {
- return nullptr;
- }
- const struct in_addr* as_in_addr =
- reinterpret_cast<const struct in_addr*>(src);
- rtc::sprintfn(dst, size, "%d.%d.%d.%d",
- as_in_addr->S_un.S_un_b.s_b1,
- as_in_addr->S_un.S_un_b.s_b2,
- as_in_addr->S_un.S_un_b.s_b3,
- as_in_addr->S_un.S_un_b.s_b4);
- return dst;
-}
-
-// Helper function for inet_ntop for IPv6 addresses.
-const char* inet_ntop_v6(const void* src, char* dst, socklen_t size) {
- if (size < INET6_ADDRSTRLEN) {
- return nullptr;
- }
- const uint16_t* as_shorts = reinterpret_cast<const uint16_t*>(src);
- int runpos[8];
- int current = 1;
- int max = 0;
- int maxpos = -1;
- int run_array_size = arraysize(runpos);
- // Run over the address marking runs of 0s.
- for (int i = 0; i < run_array_size; ++i) {
- if (as_shorts[i] == 0) {
- runpos[i] = current;
- if (current > max) {
- maxpos = i;
- max = current;
- }
- ++current;
- } else {
- runpos[i] = -1;
- current = 1;
- }
- }
-
- if (max > 0) {
- int tmpmax = maxpos;
- // Run back through, setting -1 for all but the longest run.
- for (int i = run_array_size - 1; i >= 0; i--) {
- if (i > tmpmax) {
- runpos[i] = -1;
- } else if (runpos[i] == -1) {
- // We're less than maxpos, we hit a -1, so the 'good' run is done.
- // Setting tmpmax -1 means all remaining positions get set to -1.
- tmpmax = -1;
- }
- }
- }
-
- char* cursor = dst;
- // Print IPv4 compatible and IPv4 mapped addresses using the IPv4 helper.
- // These addresses have an initial run of either eight zero-bytes followed
- // by 0xFFFF, or an initial run of ten zero-bytes.
- if (runpos[0] == 1 && (maxpos == 5 ||
- (maxpos == 4 && as_shorts[5] == 0xFFFF))) {
- *cursor++ = ':';
- *cursor++ = ':';
- if (maxpos == 4) {
- cursor += rtc::sprintfn(cursor, INET6_ADDRSTRLEN - 2, "ffff:");
- }
- const struct in_addr* as_v4 =
- reinterpret_cast<const struct in_addr*>(&(as_shorts[6]));
- inet_ntop_v4(as_v4, cursor,
- static_cast<socklen_t>(INET6_ADDRSTRLEN - (cursor - dst)));
- } else {
- for (int i = 0; i < run_array_size; ++i) {
- if (runpos[i] == -1) {
- cursor += rtc::sprintfn(cursor,
- INET6_ADDRSTRLEN - (cursor - dst),
- "%x", NetworkToHost16(as_shorts[i]));
- if (i != 7 && runpos[i + 1] != 1) {
- *cursor++ = ':';
- }
- } else if (runpos[i] == 1) {
- // Entered the run; print the colons and skip the run.
- *cursor++ = ':';
- *cursor++ = ':';
- i += (max - 1);
- }
- }
- }
- return dst;
-}
-
-// Helper function for inet_pton for IPv4 addresses.
-// |src| points to a character string containing an IPv4 network address in
-// dotted-decimal format, "ddd.ddd.ddd.ddd", where ddd is a decimal number
-// of up to three digits in the range 0 to 255.
-// The address is converted and copied to dst,
-// which must be sizeof(struct in_addr) (4) bytes (32 bits) long.
-int inet_pton_v4(const char* src, void* dst) {
- const int kIpv4AddressSize = 4;
- int found = 0;
- const char* src_pos = src;
- unsigned char result[kIpv4AddressSize] = {0};
-
- while (*src_pos != '\0') {
- // strtol won't treat whitespace characters in the begining as an error,
- // so check to ensure this is started with digit before passing to strtol.
- if (!isdigit(*src_pos)) {
- return 0;
- }
- char* end_pos;
- long value = strtol(src_pos, &end_pos, 10);
- if (value < 0 || value > 255 || src_pos == end_pos) {
- return 0;
- }
- ++found;
- if (found > kIpv4AddressSize) {
- return 0;
- }
- result[found - 1] = static_cast<unsigned char>(value);
- src_pos = end_pos;
- if (*src_pos == '.') {
- // There's more.
- ++src_pos;
- } else if (*src_pos != '\0') {
- // If it's neither '.' nor '\0' then return fail.
- return 0;
- }
- }
- if (found != kIpv4AddressSize) {
- return 0;
- }
- memcpy(dst, result, sizeof(result));
- return 1;
-}
-
-// Helper function for inet_pton for IPv6 addresses.
-int inet_pton_v6(const char* src, void* dst) {
- // sscanf will pick any other invalid chars up, but it parses 0xnnnn as hex.
- // Check for literal x in the input string.
- const char* readcursor = src;
- char c = *readcursor++;
- while (c) {
- if (c == 'x') {
- return 0;
- }
- c = *readcursor++;
- }
- readcursor = src;
-
- struct in6_addr an_addr;
- memset(&an_addr, 0, sizeof(an_addr));
-
- uint16_t* addr_cursor = reinterpret_cast<uint16_t*>(&an_addr.s6_addr[0]);
- uint16_t* addr_end = reinterpret_cast<uint16_t*>(&an_addr.s6_addr[16]);
- bool seencompressed = false;
-
- // Addresses that start with "::" (i.e., a run of initial zeros) or
- // "::ffff:" can potentially be IPv4 mapped or compatibility addresses.
- // These have dotted-style IPv4 addresses on the end (e.g. "::192.168.7.1").
- if (*readcursor == ':' && *(readcursor+1) == ':' &&
- *(readcursor + 2) != 0) {
- // Check for periods, which we'll take as a sign of v4 addresses.
- const char* addrstart = readcursor + 2;
- if (rtc::strchr(addrstart, ".")) {
- const char* colon = rtc::strchr(addrstart, "::");
- if (colon) {
- uint16_t a_short;
- int bytesread = 0;
- if (sscanf(addrstart, "%hx%n", &a_short, &bytesread) != 1 ||
- a_short != 0xFFFF || bytesread != 4) {
- // Colons + periods means has to be ::ffff:a.b.c.d. But it wasn't.
- return 0;
- } else {
- an_addr.s6_addr[10] = 0xFF;
- an_addr.s6_addr[11] = 0xFF;
- addrstart = colon + 1;
- }
- }
- struct in_addr v4;
- if (inet_pton_v4(addrstart, &v4.s_addr)) {
- memcpy(&an_addr.s6_addr[12], &v4, sizeof(v4));
- memcpy(dst, &an_addr, sizeof(an_addr));
- return 1;
- } else {
- // Invalid v4 address.
- return 0;
- }
- }
- }
-
- // For addresses without a trailing IPv4 component ('normal' IPv6 addresses).
- while (*readcursor != 0 && addr_cursor < addr_end) {
- if (*readcursor == ':') {
- if (*(readcursor + 1) == ':') {
- if (seencompressed) {
- // Can only have one compressed run of zeroes ("::") per address.
- return 0;
- }
- // Hit a compressed run. Count colons to figure out how much of the
- // address is skipped.
- readcursor += 2;
- const char* coloncounter = readcursor;
- int coloncount = 0;
- if (*coloncounter == 0) {
- // Special case - trailing ::.
- addr_cursor = addr_end;
- } else {
- while (*coloncounter) {
- if (*coloncounter == ':') {
- ++coloncount;
- }
- ++coloncounter;
- }
- // (coloncount + 1) is the number of shorts left in the address.
- // If this number is greater than the number of available shorts, the
- // address is malformed.
- if (coloncount + 1 > addr_end - addr_cursor) {
- return 0;
- }
- addr_cursor = addr_end - (coloncount + 1);
- seencompressed = true;
- }
- } else {
- ++readcursor;
- }
- } else {
- uint16_t word;
- int bytesread = 0;
- if (sscanf(readcursor, "%4hx%n", &word, &bytesread) != 1) {
- return 0;
- } else {
- *addr_cursor = HostToNetwork16(word);
- ++addr_cursor;
- readcursor += bytesread;
- if (*readcursor != ':' && *readcursor != '\0') {
- return 0;
- }
- }
- }
- }
-
- if (*readcursor != '\0' || addr_cursor < addr_end) {
- // Catches addresses too short or too long.
- return 0;
- }
- memcpy(dst, &an_addr, sizeof(an_addr));
- return 1;
-}
-
-//
-// Unix time is in seconds relative to 1/1/1970. So we compute the windows
-// FILETIME of that time/date, then we add/subtract in appropriate units to
-// convert to/from unix time.
-// The units of FILETIME are 100ns intervals, so by multiplying by or dividing
-// by 10000000, we can convert to/from seconds.
-//
-// FileTime = UnixTime*10000000 + FileTime(1970)
-// UnixTime = (FileTime-FileTime(1970))/10000000
-//
-
-void FileTimeToUnixTime(const FILETIME& ft, time_t* ut) {
- RTC_DCHECK(nullptr != ut);
-
- // FILETIME has an earlier date base than time_t (1/1/1970), so subtract off
- // the difference.
- SYSTEMTIME base_st;
- memset(&base_st, 0, sizeof(base_st));
- base_st.wDay = 1;
- base_st.wMonth = 1;
- base_st.wYear = 1970;
-
- FILETIME base_ft;
- SystemTimeToFileTime(&base_st, &base_ft);
-
- ULARGE_INTEGER base_ul, current_ul;
- memcpy(&base_ul, &base_ft, sizeof(FILETIME));
- memcpy(&current_ul, &ft, sizeof(FILETIME));
-
- // Divide by big number to convert to seconds, then subtract out the 1970
- // base date value.
- const ULONGLONG RATIO = 10000000;
- *ut = static_cast<time_t>((current_ul.QuadPart - base_ul.QuadPart) / RATIO);
-}
-
-void UnixTimeToFileTime(const time_t& ut, FILETIME* ft) {
- RTC_DCHECK(nullptr != ft);
-
- // FILETIME has an earlier date base than time_t (1/1/1970), so add in
- // the difference.
- SYSTEMTIME base_st;
- memset(&base_st, 0, sizeof(base_st));
- base_st.wDay = 1;
- base_st.wMonth = 1;
- base_st.wYear = 1970;
-
- FILETIME base_ft;
- SystemTimeToFileTime(&base_st, &base_ft);
-
- ULARGE_INTEGER base_ul;
- memcpy(&base_ul, &base_ft, sizeof(FILETIME));
-
- // Multiply by big number to convert to 100ns units, then add in the 1970
- // base date value.
- const ULONGLONG RATIO = 10000000;
- ULARGE_INTEGER current_ul;
- current_ul.QuadPart = base_ul.QuadPart + static_cast<int64_t>(ut) * RATIO;
- memcpy(ft, &current_ul, sizeof(FILETIME));
-}
-
-bool Utf8ToWindowsFilename(const std::string& utf8, std::wstring* filename) {
- // TODO: Integrate into fileutils.h
- // TODO: Handle wide and non-wide cases via TCHAR?
- // TODO: Skip \\?\ processing if the length is not > MAX_PATH?
- // TODO: Write unittests
-
- // Convert to Utf16
- int wlen =
- ::MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(),
- static_cast<int>(utf8.length() + 1), nullptr, 0);
- if (0 == wlen) {
- return false;
- }
- wchar_t* wfilename = STACK_ARRAY(wchar_t, wlen);
- if (0 == ::MultiByteToWideChar(CP_UTF8, 0, utf8.c_str(),
- static_cast<int>(utf8.length() + 1),
- wfilename, wlen)) {
- return false;
- }
- // Replace forward slashes with backslashes
- std::replace(wfilename, wfilename + wlen, L'/', L'\\');
- // Convert to complete filename
- DWORD full_len = ::GetFullPathName(wfilename, 0, nullptr, nullptr);
- if (0 == full_len) {
- return false;
- }
- wchar_t* filepart = nullptr;
- wchar_t* full_filename = STACK_ARRAY(wchar_t, full_len + 6);
- wchar_t* start = full_filename + 6;
- if (0 == ::GetFullPathName(wfilename, full_len, start, &filepart)) {
- return false;
- }
- // Add long-path prefix
- const wchar_t kLongPathPrefix[] = L"\\\\?\\UNC";
- if ((start[0] != L'\\') || (start[1] != L'\\')) {
- // Non-unc path: <pathname>
- // Becomes: \\?\<pathname>
- start -= 4;
- RTC_DCHECK(start >= full_filename);
- memcpy(start, kLongPathPrefix, 4 * sizeof(wchar_t));
- } else if (start[2] != L'?') {
- // Unc path: \\<server>\<pathname>
- // Becomes: \\?\UNC\<server>\<pathname>
- start -= 6;
- RTC_DCHECK(start >= full_filename);
- memcpy(start, kLongPathPrefix, 7 * sizeof(wchar_t));
- } else {
- // Already in long-path form.
- }
- filename->assign(start);
- return true;
-}
-
-bool GetOsVersion(int* major, int* minor, int* build) {
- OSVERSIONINFO info = {0};
- info.dwOSVersionInfoSize = sizeof(info);
- if (GetVersionEx(&info)) {
- if (major) *major = info.dwMajorVersion;
- if (minor) *minor = info.dwMinorVersion;
- if (build) *build = info.dwBuildNumber;
- return true;
- }
- return false;
-}
-
-bool GetCurrentProcessIntegrityLevel(int* level) {
- bool ret = false;
- HANDLE process = ::GetCurrentProcess(), token;
- if (OpenProcessToken(process, TOKEN_QUERY | TOKEN_QUERY_SOURCE, &token)) {
- DWORD size;
- if (!GetTokenInformation(token, TokenIntegrityLevel, nullptr, 0, &size) &&
- GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
- char* buf = STACK_ARRAY(char, size);
- TOKEN_MANDATORY_LABEL* til =
- reinterpret_cast<TOKEN_MANDATORY_LABEL*>(buf);
- if (GetTokenInformation(token, TokenIntegrityLevel, til, size, &size)) {
-
- DWORD count = *GetSidSubAuthorityCount(til->Label.Sid);
- *level = *GetSidSubAuthority(til->Label.Sid, count - 1);
- ret = true;
- }
- }
- CloseHandle(token);
- }
- return ret;
-}
-
-} // namespace rtc
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