Add m-esr52 at 52.6.0

1 files changed, 521 insertions, 0 deletions

diff --git a/dom/wifi/WifiUtils.cpp b/dom/wifi/WifiUtils.cpp
new file mode 100644
index 000000000..2526c9ea4
--- /dev/null
+++ b/dom/wifi/WifiUtils.cpp
@@ -0,0 +1,521 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WifiUtils.h"
+#include <dlfcn.h>
+#include <errno.h>
+#include <cutils/properties.h>
+#include "prinit.h"
+#include "mozilla/Sprintf.h"
+#include "js/CharacterEncoding.h"
+
+using namespace mozilla::dom;
+
+#define BUFFER_SIZE        4096
+#define COMMAND_SIZE       256
+
+// Intentionally not trying to dlclose() this handle. That's playing
+// Russian roulette with security bugs.
+static void* sWifiLib;
+static PRCallOnceType sInitWifiLib;
+
+static PRStatus
+InitWifiLib()
+{
+  sWifiLib = dlopen("/system/lib/libhardware_legacy.so", RTLD_LAZY);
+  // We might fail to open the hardware lib. That's OK.
+  return PR_SUCCESS;
+}
+
+static void*
+GetSharedLibrary()
+{
+  PR_CallOnce(&sInitWifiLib, InitWifiLib);
+  return sWifiLib;
+}
+
+static bool
+GetWifiP2pSupported()
+{
+  char propP2pSupported[PROPERTY_VALUE_MAX];
+  property_get("ro.moz.wifi.p2p_supported", propP2pSupported, "0");
+  return (0 == strcmp(propP2pSupported, "1"));
+}
+
+static int
+hex2num(char c)
+{
+  if (c >= '0' && c <= '9')
+    return c - '0';
+  if (c >= 'a' && c <= 'f')
+    return c - 'a' + 10;
+  if (c >= 'A' && c <= 'F')
+    return c - 'A' + 10;
+  return -1;
+}
+
+static int
+hex2byte(const char* hex)
+{
+  int a, b;
+  a = hex2num(*hex++);
+  if (a < 0)
+    return -1;
+  b = hex2num(*hex++);
+  if (b < 0)
+    return -1;
+  return (a << 4) | b;
+}
+
+// This function is equivalent to printf_decode() at src/utils/common.c in
+// the supplicant.
+
+static uint32_t
+convertToBytes(char* buf, uint32_t maxlen, const char* str)
+{
+  const char *pos = str;
+  uint32_t len = 0;
+  int val;
+
+  while (*pos) {
+    if (len == maxlen)
+      break;
+    switch (*pos) {
+    case '\\':
+      pos++;
+      switch (*pos) {
+      case '\\':
+        buf[len++] = '\\';
+        pos++;
+        break;
+      case '"':
+        buf[len++] = '"';
+        pos++;
+        break;
+      case 'n':
+        buf[len++] = '\n';
+        pos++;
+        break;
+      case 'r':
+        buf[len++] = '\r';
+        pos++;
+        break;
+      case 't':
+        buf[len++] = '\t';
+        pos++;
+        break;
+      case 'e':
+        buf[len++] = '\e';
+        pos++;
+        break;
+      case 'x':
+        pos++;
+        val = hex2byte(pos);
+        if (val < 0) {
+          val = hex2num(*pos);
+          if (val < 0)
+            break;
+          buf[len++] = val;
+          pos++;
+        } else {
+          buf[len++] = val;
+          pos += 2;
+        }
+        break;
+      case '0':
+      case '1':
+      case '2':
+      case '3':
+      case '4':
+      case '5':
+      case '6':
+      case '7':
+        val = *pos++ - '0';
+        if (*pos >= '0' && *pos <= '7')
+          val = val * 8 + (*pos++ - '0');
+        if (*pos >= '0' && *pos <= '7')
+          val = val * 8 + (*pos++ - '0');
+        buf[len++] = val;
+        break;
+      default:
+        break;
+      }
+      break;
+    default:
+      buf[len++] = *pos++;
+      break;
+    }
+  }
+  return len;
+}
+
+// This is the same algorithm as in InflateUTF8StringToBuffer with Copy and
+// while ignoring invalids.
+// https://mxr.mozilla.org/mozilla-central/source/js/src/vm/CharacterEncoding.cpp#231
+
+static const uint32_t REPLACE_UTF8 = 0xFFFD;
+
+static void
+LossyConvertUTF8toUTF16(const char* aInput, uint32_t aLength, nsAString& aOut)
+{
+  JS::UTF8Chars src(aInput, aLength);
+
+  char16_t dst[aLength]; // Allocating for worst case.
+
+  // Count how many char16_t characters are needed in the inflated string.
+  // |i| is the index into |src|, and |j| is the the index into |dst|.
+  size_t srclen = src.length();
+  uint32_t j = 0;
+  for (uint32_t i = 0; i < srclen; i++, j++) {
+    uint32_t v = uint32_t(src[i]);
+    if (v == uint32_t('\0') && i < srclen - 1) {
+      // If the leading byte is '\0' and it's not the last byte,
+      // just ignore it to prevent from being truncated. This could
+      // be caused by |convertToBytes| (e.g. \x00 would be converted to '\0')
+      j--;
+      continue;
+    }
+    if (!(v & 0x80)) {
+      // ASCII code unit.  Simple copy.
+      dst[j] = char16_t(v);
+    } else {
+      // Non-ASCII code unit.  Determine its length in bytes (n).
+      uint32_t n = 1;
+      while (v & (0x80 >> n))
+        n++;
+
+  #define INVALID(report, arg, n2)                          \
+      do {                                                  \
+        n = n2;                                             \
+        goto invalidMultiByteCodeUnit;                      \
+      } while (0)
+
+      // Check the leading byte.
+      if (n < 2 || n > 4)
+        INVALID(ReportInvalidCharacter, i, 1);
+
+      // Check that |src| is large enough to hold an n-byte code unit.
+      if (i + n > srclen)
+        INVALID(ReportBufferTooSmall, /* dummy = */ 0, 1);
+
+      // Check the second byte.  From Unicode Standard v6.2, Table 3-7
+      // Well-Formed UTF-8 Byte Sequences.
+      if ((v == 0xE0 && ((uint8_t)src[i + 1] & 0xE0) != 0xA0) ||  // E0 A0~BF
+        (v == 0xED && ((uint8_t)src[i + 1] & 0xE0) != 0x80) ||  // ED 80~9F
+        (v == 0xF0 && ((uint8_t)src[i + 1] & 0xF0) == 0x80) ||  // F0 90~BF
+        (v == 0xF4 && ((uint8_t)src[i + 1] & 0xF0) != 0x80))    // F4 80~8F
+      {
+        INVALID(ReportInvalidCharacter, i, 1);
+      }
+
+      // Check the continuation bytes.
+      for (uint32_t m = 1; m < n; m++)
+        if ((src[i + m] & 0xC0) != 0x80)
+          INVALID(ReportInvalidCharacter, i, m);
+
+      // Determine the code unit's length in char16_t units and act accordingly.
+      v = JS::Utf8ToOneUcs4Char((uint8_t *)&src[i], n);
+      if (v < 0x10000) {
+        // The n-byte UTF8 code unit will fit in a single char16_t.
+        dst[j] = char16_t(v);
+      } else {
+        v -= 0x10000;
+        if (v <= 0xFFFFF) {
+          // The n-byte UTF8 code unit will fit in two char16_t units.
+          dst[j] = char16_t((v >> 10) + 0xD800);
+          j++;
+          dst[j] = char16_t((v & 0x3FF) + 0xDC00);
+        } else {
+          // The n-byte UTF8 code unit won't fit in two char16_t units.
+          INVALID(ReportTooBigCharacter, v, 1);
+        }
+      }
+
+    invalidMultiByteCodeUnit:
+      // Move i to the last byte of the multi-byte code unit;  the loop
+      // header will do the final i++ to move to the start of the next
+      // code unit.
+      i += n - 1;
+    }
+  }
+
+  dst[j] = 0;
+  aOut = dst;
+}
+
+// Helper to check we have loaded the hardware shared library.
+#define CHECK_HWLIB(ret)                                                      \
+  void* hwLib = GetSharedLibrary();                                           \
+  if (!hwLib) {                                                               \
+    NS_WARNING("No /system/lib/libhardware_legacy.so");                       \
+    return ret;                                                               \
+  }
+
+#define DEFAULT_IMPL(name, ret, args...) \
+  DEFINE_DLFUNC(name, ret, args...)      \
+  ret do_##name(args) {                  \
+    USE_DLFUNC(name)                     \
+    return name(args);                   \
+  }
+
+// ICS implementation.
+class ICSWpaSupplicantImpl : public WpaSupplicantImpl
+{
+public:
+  DEFAULT_IMPL(wifi_load_driver, int32_t, )
+  DEFAULT_IMPL(wifi_unload_driver, int32_t, )
+
+  DEFINE_DLFUNC(wifi_wait_for_event, int32_t, char*, size_t)
+  int32_t do_wifi_wait_for_event(const char *iface, char *buf, size_t len) {
+    USE_DLFUNC(wifi_wait_for_event)
+    return wifi_wait_for_event(buf, len);
+  }
+
+  DEFINE_DLFUNC(wifi_command, int32_t, const char*, char*, size_t*)
+  int32_t do_wifi_command(const char* iface, const char* cmd, char* buf, size_t* len) {
+    USE_DLFUNC(wifi_command)
+    return wifi_command(cmd, buf, len);
+  }
+
+  DEFINE_DLFUNC(wifi_start_supplicant, int32_t, )
+  int32_t do_wifi_start_supplicant(int32_t) {
+    USE_DLFUNC(wifi_start_supplicant)
+    return wifi_start_supplicant();
+  }
+
+  DEFINE_DLFUNC(wifi_stop_supplicant, int32_t)
+  int32_t do_wifi_stop_supplicant(int32_t) {
+    USE_DLFUNC(wifi_stop_supplicant)
+    return wifi_stop_supplicant();
+  }
+
+  DEFINE_DLFUNC(wifi_connect_to_supplicant, int32_t, )
+  int32_t do_wifi_connect_to_supplicant(const char* iface) {
+    USE_DLFUNC(wifi_connect_to_supplicant)
+    return wifi_connect_to_supplicant();
+  }
+
+  DEFINE_DLFUNC(wifi_close_supplicant_connection, void, )
+  void do_wifi_close_supplicant_connection(const char* iface) {
+    USE_DLFUNC(wifi_close_supplicant_connection)
+    return wifi_close_supplicant_connection();
+  }
+};
+
+// JB implementation.
+// We only redefine the methods that have a different signature than on ICS.
+class JBWpaSupplicantImpl : public ICSWpaSupplicantImpl
+{
+public:
+  DEFINE_DLFUNC(wifi_wait_for_event, int32_t, const char*, char*, size_t)
+  int32_t do_wifi_wait_for_event(const char* iface, char* buf, size_t len) {
+    USE_DLFUNC(wifi_wait_for_event)
+    return wifi_wait_for_event(iface, buf, len);
+  }
+
+  DEFINE_DLFUNC(wifi_command, int32_t, const char*, const char*, char*, size_t*)
+  int32_t do_wifi_command(const char* iface, const char* cmd, char* buf, size_t* len) {
+    USE_DLFUNC(wifi_command)
+    return wifi_command(iface, cmd, buf, len);
+  }
+
+  DEFINE_DLFUNC(wifi_start_supplicant, int32_t, int32_t)
+  int32_t do_wifi_start_supplicant(int32_t arg) {
+    USE_DLFUNC(wifi_start_supplicant)
+    return wifi_start_supplicant(arg);
+  }
+
+  DEFINE_DLFUNC(wifi_stop_supplicant, int32_t, int32_t)
+  int32_t do_wifi_stop_supplicant(int32_t arg) {
+    USE_DLFUNC(wifi_stop_supplicant)
+    return wifi_stop_supplicant(arg);
+  }
+
+  DEFINE_DLFUNC(wifi_connect_to_supplicant, int32_t, const char*)
+  int32_t do_wifi_connect_to_supplicant(const char* iface) {
+    USE_DLFUNC(wifi_connect_to_supplicant)
+    return wifi_connect_to_supplicant(iface);
+  }
+
+  DEFINE_DLFUNC(wifi_close_supplicant_connection, void, const char*)
+  void do_wifi_close_supplicant_connection(const char* iface) {
+    USE_DLFUNC(wifi_close_supplicant_connection)
+    wifi_close_supplicant_connection(iface);
+  }
+};
+
+// KK implementation.
+// We only redefine the methods that have a different signature than on ICS.
+class KKWpaSupplicantImpl : public ICSWpaSupplicantImpl
+{
+public:
+  DEFINE_DLFUNC(wifi_start_supplicant, int32_t, int32_t)
+  int32_t do_wifi_start_supplicant(int32_t arg) {
+    USE_DLFUNC(wifi_start_supplicant)
+    return wifi_start_supplicant(arg);
+  }
+
+  DEFINE_DLFUNC(wifi_stop_supplicant, int32_t, int32_t)
+  int32_t do_wifi_stop_supplicant(int32_t arg) {
+    USE_DLFUNC(wifi_stop_supplicant)
+    return wifi_stop_supplicant(arg);
+  }
+
+  DEFINE_DLFUNC(wifi_command, int32_t, const char*, char*, size_t*)
+  int32_t do_wifi_command(const char* iface, const char* cmd, char* buf, size_t* len) {
+    char command[COMMAND_SIZE];
+    if (!strcmp(iface, "p2p0")) {
+      // Commands for p2p0 interface don't need prefix
+      SprintfLiteral(command, "%s", cmd);
+    }
+    else {
+      SprintfLiteral(command, "IFNAME=%s %s", iface, cmd);
+    }
+    USE_DLFUNC(wifi_command)
+    return wifi_command(command, buf, len);
+  }
+};
+
+// Concrete class to use to access the wpa supplicant.
+WpaSupplicant::WpaSupplicant()
+{
+  char propVersion[PROPERTY_VALUE_MAX];
+  property_get("ro.build.version.sdk", propVersion, "0");
+  mSdkVersion = strtol(propVersion, nullptr, 10);
+
+  if (mSdkVersion < 16) {
+    mImpl = MakeUnique<ICSWpaSupplicantImpl>();
+  } else if (mSdkVersion < 19) {
+    mImpl = MakeUnique<JBWpaSupplicantImpl>();
+  } else {
+    mImpl = MakeUnique<KKWpaSupplicantImpl>();
+  }
+  mWifiHotspotUtils = MakeUnique<WifiHotspotUtils>();
+};
+
+void WpaSupplicant::WaitForEvent(nsAString& aEvent, const nsCString& aInterface)
+{
+  CHECK_HWLIB()
+
+  char buffer[BUFFER_SIZE];
+  int32_t ret = mImpl->do_wifi_wait_for_event(aInterface.get(), buffer, BUFFER_SIZE);
+  CheckBuffer(buffer, ret, aEvent);
+}
+
+#define GET_CHAR(prop) NS_ConvertUTF16toUTF8(aOptions.prop).get()
+
+/**
+ * Make a subnet mask.
+ */
+uint32_t WpaSupplicant::MakeMask(uint32_t len) {
+  uint32_t mask = 0;
+  for (uint32_t i = 0; i < len; ++i) {
+    mask |= (0x80000000 >> i);
+  }
+  return ntohl(mask);
+}
+
+bool WpaSupplicant::ExecuteCommand(CommandOptions aOptions,
+                                   WifiResultOptions& aResult,
+                                   const nsCString& aInterface)
+{
+  CHECK_HWLIB(false)
+
+  if (!mWifiHotspotUtils->GetSharedLibrary()) {
+    return false;
+  }
+
+  // Always correlate the opaque ids.
+  aResult.mId = aOptions.mId;
+
+  if (aOptions.mCmd.EqualsLiteral("command")) {
+    size_t len = BUFFER_SIZE - 1;
+    char buffer[BUFFER_SIZE];
+    NS_ConvertUTF16toUTF8 request(aOptions.mRequest);
+    aResult.mStatus = mImpl->do_wifi_command(aInterface.get(), request.get(), buffer, &len);
+    nsString value;
+    if (aResult.mStatus == 0) {
+      if (buffer[len - 1] == '\n') { // remove trailing new lines.
+        len--;
+      }
+      buffer[len] = '\0';
+      CheckBuffer(buffer, len, value);
+    }
+    aResult.mReply = value;
+  } else if (aOptions.mCmd.EqualsLiteral("close_supplicant_connection")) {
+    mImpl->do_wifi_close_supplicant_connection(aInterface.get());
+  } else if (aOptions.mCmd.EqualsLiteral("load_driver")) {
+    aResult.mStatus = mImpl->do_wifi_load_driver();
+  } else if (aOptions.mCmd.EqualsLiteral("unload_driver")) {
+    aResult.mStatus = mImpl->do_wifi_unload_driver();
+  } else if (aOptions.mCmd.EqualsLiteral("start_supplicant")) {
+    aResult.mStatus = mImpl->do_wifi_start_supplicant(GetWifiP2pSupported() ? 1 : 0);
+  } else if (aOptions.mCmd.EqualsLiteral("stop_supplicant")) {
+    aResult.mStatus = mImpl->do_wifi_stop_supplicant(0);
+  } else if (aOptions.mCmd.EqualsLiteral("connect_to_supplicant")) {
+    aResult.mStatus = mImpl->do_wifi_connect_to_supplicant(aInterface.get());
+  } else if (aOptions.mCmd.EqualsLiteral("hostapd_command")) {
+    size_t len = BUFFER_SIZE - 1;
+    char buffer[BUFFER_SIZE];
+    NS_ConvertUTF16toUTF8 request(aOptions.mRequest);
+    aResult.mStatus = mWifiHotspotUtils->do_wifi_hostapd_command(request.get(),
+                                                                 buffer,
+                                                                 &len);
+    nsString value;
+    if (aResult.mStatus == 0) {
+      if (buffer[len - 1] == '\n') { // remove trailing new lines.
+        len--;
+      }
+      buffer[len] = '\0';
+      CheckBuffer(buffer, len, value);
+    }
+    aResult.mReply = value;
+  } else if (aOptions.mCmd.EqualsLiteral("hostapd_get_stations")) {
+    aResult.mStatus = mWifiHotspotUtils->do_wifi_hostapd_get_stations();
+  } else if (aOptions.mCmd.EqualsLiteral("connect_to_hostapd")) {
+    aResult.mStatus = mWifiHotspotUtils->do_wifi_connect_to_hostapd();
+  } else if (aOptions.mCmd.EqualsLiteral("close_hostapd_connection")) {
+    aResult.mStatus = mWifiHotspotUtils->do_wifi_close_hostapd_connection();
+
+  } else {
+    NS_WARNING("WpaSupplicant::ExecuteCommand : Unknown command");
+    printf_stderr("WpaSupplicant::ExecuteCommand : Unknown command: %s",
+      NS_ConvertUTF16toUTF8(aOptions.mCmd).get());
+    return false;
+  }
+
+  return true;
+}
+
+// Checks the buffer and do the utf processing.
+void
+WpaSupplicant::CheckBuffer(char* buffer, int32_t length,
+                           nsAString& aEvent)
+{
+  if (length <= 0 || length >= (BUFFER_SIZE - 1)) {
+    NS_WARNING("WpaSupplicant::CheckBuffer: Invalid buffer length");
+    return;
+  }
+
+  if (mSdkVersion < 18) {
+    buffer[length] = 0;
+    LossyConvertUTF8toUTF16(buffer, length, aEvent);
+    return;
+  }
+
+  // After Android JB4.3, the SSIDs have been converted into printable form.
+  // In most of cases, SSIDs do not use unprintable characters, but IEEE 802.11
+  // standard does not limit the used character set, so anything could be used
+  // in an SSID. Convert it to raw data form here.
+  char bytesBuffer[BUFFER_SIZE];
+  uint32_t bytes = convertToBytes(bytesBuffer, length, buffer);
+  if (bytes <= 0 || bytes >= BUFFER_SIZE) {
+    NS_WARNING("WpaSupplicant::CheckBuffer: Invalid bytesbuffer length");
+    return;
+  }
+  bytesBuffer[bytes] = 0;
+  LossyConvertUTF8toUTF16(bytesBuffer, bytes, aEvent);
+}