1 files changed, 247 insertions, 0 deletions
diff --git a/toolkit/system/windowsproxy/nsWindowsSystemProxySettings.cpp b/toolkit/system/windowsproxy/nsWindowsSystemProxySettings.cpp
new file mode 100644
index 0000000000..7921cb60a2
--- /dev/null
+++ b/toolkit/system/windowsproxy/nsWindowsSystemProxySettings.cpp
@@ -0,0 +1,247 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 <windows.h>
+#include <ras.h>
+#include <wininet.h>
+
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Attributes.h"
+#include "nsISystemProxySettings.h"
+#include "mozilla/Components.h"
+#include "mozilla/ProfilerLabels.h"
+#include "nsPrintfCString.h"
+#include "nsNetCID.h"
+#include "nsThreadUtils.h"
+#include "prnetdb.h"
+#include "ProxyUtils.h"
+
+class nsWindowsSystemProxySettings final : public nsISystemProxySettings {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSISYSTEMPROXYSETTINGS
+
+  nsWindowsSystemProxySettings(){};
+
+ private:
+  ~nsWindowsSystemProxySettings(){};
+
+  bool MatchOverride(const nsACString& aHost);
+  bool PatternMatch(const nsACString& aHost, const nsACString& aOverride);
+};
+
+NS_IMPL_ISUPPORTS(nsWindowsSystemProxySettings, nsISystemProxySettings)
+
+NS_IMETHODIMP
+nsWindowsSystemProxySettings::GetMainThreadOnly(bool* aMainThreadOnly) {
+  // bug 1366133: if you change this to main thread only, please handle
+  // nsProtocolProxyService::Resolve_Internal carefully to avoid hang on main
+  // thread.
+  *aMainThreadOnly = false;
+  return NS_OK;
+}
+
+static void SetProxyResult(const char* aType, const nsACString& aHostPort,
+                           nsACString& aResult) {
+  aResult.AssignASCII(aType);
+  aResult.Append(' ');
+  aResult.Append(aHostPort);
+}
+
+static void SetProxyResultDirect(nsACString& aResult) {
+  // For whatever reason, a proxy is not to be used.
+  aResult.AssignLiteral("DIRECT");
+}
+
+static nsresult ReadInternetOption(uint32_t aOption, uint32_t& aFlags,
+                                   nsAString& aValue) {
+  // Bug 1366133: InternetGetConnectedStateExW() may cause hangs
+  MOZ_ASSERT(!NS_IsMainThread());
+
+  DWORD connFlags = 0;
+  WCHAR connName[RAS_MaxEntryName + 1];
+  MOZ_SEH_TRY {
+    InternetGetConnectedStateExW(&connFlags, connName,
+                                 mozilla::ArrayLength(connName), 0);
+  }
+  MOZ_SEH_EXCEPT(EXCEPTION_EXECUTE_HANDLER) { return NS_ERROR_FAILURE; }
+
+  INTERNET_PER_CONN_OPTIONW options[2];
+  options[0].dwOption = INTERNET_PER_CONN_FLAGS_UI;
+  options[1].dwOption = aOption;
+
+  INTERNET_PER_CONN_OPTION_LISTW list;
+  list.dwSize = sizeof(INTERNET_PER_CONN_OPTION_LISTW);
+  list.pszConnection =
+      connFlags & INTERNET_CONNECTION_MODEM ? connName : nullptr;
+  list.dwOptionCount = mozilla::ArrayLength(options);
+  list.dwOptionError = 0;
+  list.pOptions = options;
+
+  unsigned long size = sizeof(INTERNET_PER_CONN_OPTION_LISTW);
+  if (!InternetQueryOptionW(nullptr, INTERNET_OPTION_PER_CONNECTION_OPTION,
+                            &list, &size)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  aFlags = options[0].Value.dwValue;
+  aValue.Assign(options[1].Value.pszValue);
+  GlobalFree(options[1].Value.pszValue);
+
+  return NS_OK;
+}
+
+bool nsWindowsSystemProxySettings::MatchOverride(const nsACString& aHost) {
+  nsresult rv;
+  uint32_t flags = 0;
+  nsAutoString buf;
+
+  rv = ReadInternetOption(INTERNET_PER_CONN_PROXY_BYPASS, flags, buf);
+  if (NS_FAILED(rv)) return false;
+
+  NS_ConvertUTF16toUTF8 cbuf(buf);
+
+  nsAutoCString host(aHost);
+  int32_t start = 0;
+  int32_t end = cbuf.Length();
+
+  // Windows formats its proxy override list in the form:
+  // server;server;server where 'server' is a server name pattern or IP
+  // address, or "<local>". "<local>" must be translated to
+  // "localhost;127.0.0.1".
+  // In a server name pattern, a '*' character matches any substring and
+  // all other characters must match themselves; the whole pattern must match
+  // the whole hostname.
+  while (true) {
+    int32_t delimiter = cbuf.FindCharInSet(" ;", start);
+    if (delimiter == -1) delimiter = end;
+
+    if (delimiter != start) {
+      const nsAutoCString override(Substring(cbuf, start, delimiter - start));
+      if (override.EqualsLiteral("<local>")) {
+        PRNetAddr addr;
+        bool isIpAddr = (PR_StringToNetAddr(host.get(), &addr) == PR_SUCCESS);
+
+        // Don't use proxy for local hosts (plain hostname, no dots)
+        if (!isIpAddr && !host.Contains('.')) {
+          return true;
+        }
+
+        if (host.EqualsLiteral("127.0.0.1") || host.EqualsLiteral("::1")) {
+          return true;
+        }
+      } else if (PatternMatch(host, override)) {
+        return true;
+      }
+    }
+
+    if (delimiter == end) break;
+    start = ++delimiter;
+  }
+
+  return false;
+}
+
+bool nsWindowsSystemProxySettings::PatternMatch(const nsACString& aHost,
+                                                const nsACString& aOverride) {
+  return mozilla::toolkit::system::IsHostProxyEntry(aHost, aOverride);
+}
+
+nsresult nsWindowsSystemProxySettings::GetPACURI(nsACString& aResult) {
+  AUTO_PROFILER_LABEL("nsWindowsSystemProxySettings::GetPACURI", OTHER);
+  nsresult rv;
+  uint32_t flags = 0;
+  nsAutoString buf;
+
+  rv = ReadInternetOption(INTERNET_PER_CONN_AUTOCONFIG_URL, flags, buf);
+  if (!(flags & PROXY_TYPE_AUTO_PROXY_URL)) {
+    aResult.Truncate();
+    return rv;
+  }
+
+  if (NS_SUCCEEDED(rv)) aResult = NS_ConvertUTF16toUTF8(buf);
+  return rv;
+}
+
+nsresult nsWindowsSystemProxySettings::GetProxyForURI(const nsACString& aSpec,
+                                                      const nsACString& aScheme,
+                                                      const nsACString& aHost,
+                                                      const int32_t aPort,
+                                                      nsACString& aResult) {
+  nsresult rv;
+  uint32_t flags = 0;
+  nsAutoString buf;
+
+  rv = ReadInternetOption(INTERNET_PER_CONN_PROXY_SERVER, flags, buf);
+  if (NS_FAILED(rv) || !(flags & PROXY_TYPE_PROXY)) {
+    SetProxyResultDirect(aResult);
+    return NS_OK;
+  }
+
+  if (MatchOverride(aHost)) {
+    SetProxyResultDirect(aResult);
+    return NS_OK;
+  }
+
+  NS_ConvertUTF16toUTF8 cbuf(buf);
+
+  constexpr auto kSocksPrefix = "socks="_ns;
+  nsAutoCString prefix;
+  ToLowerCase(aScheme, prefix);
+
+  prefix.Append('=');
+
+  nsAutoCString specificProxy;
+  nsAutoCString defaultProxy;
+  nsAutoCString socksProxy;
+  int32_t start = 0;
+  int32_t end = cbuf.Length();
+
+  while (true) {
+    int32_t delimiter = cbuf.FindCharInSet(" ;", start);
+    if (delimiter == -1) delimiter = end;
+
+    if (delimiter != start) {
+      const nsAutoCString proxy(Substring(cbuf, start, delimiter - start));
+      if (proxy.FindChar('=') == -1) {
+        // If a proxy name is listed by itself, it is used as the
+        // default proxy for any protocols that do not have a specific
+        // proxy specified.
+        // (http://msdn.microsoft.com/en-us/library/aa383996%28VS.85%29.aspx)
+        defaultProxy = proxy;
+      } else if (proxy.Find(prefix) == 0) {
+        // To list a proxy for a specific protocol, the string must
+        // follow the format "<protocol>=<protocol>://<proxy_name>".
+        // (http://msdn.microsoft.com/en-us/library/aa383996%28VS.85%29.aspx)
+        specificProxy = Substring(proxy, prefix.Length());
+        break;
+      } else if (proxy.Find(kSocksPrefix) == 0) {
+        // SOCKS proxy.
+        socksProxy =
+            Substring(proxy, kSocksPrefix.Length());  // "socks=" length.
+      }
+    }
+
+    if (delimiter == end) break;
+    start = ++delimiter;
+  }
+
+  if (!specificProxy.IsEmpty())
+    SetProxyResult("PROXY", specificProxy,
+                   aResult);  // Protocol-specific proxy.
+  else if (!defaultProxy.IsEmpty())
+    SetProxyResult("PROXY", defaultProxy, aResult);  // Default proxy.
+  else if (!socksProxy.IsEmpty())
+    SetProxyResult("SOCKS", socksProxy, aResult);  // SOCKS proxy.
+  else
+    SetProxyResultDirect(aResult);  // Direct connection.
+
+  return NS_OK;
+}
+
+NS_IMPL_COMPONENT_FACTORY(nsWindowsSystemProxySettings) {
+  return mozilla::MakeAndAddRef<nsWindowsSystemProxySettings>()
+      .downcast<nsISupports>();
+}