1 files changed, 397 insertions, 0 deletions
diff --git a/toolkit/system/unixproxy/nsUnixSystemProxySettings.cpp b/toolkit/system/unixproxy/nsUnixSystemProxySettings.cpp
new file mode 100644
index 0000000000..56a53d8579
--- /dev/null
+++ b/toolkit/system/unixproxy/nsUnixSystemProxySettings.cpp
@@ -0,0 +1,397 @@
+/* -*- Mode: C++; tab-width: 2; 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 "nsISystemProxySettings.h"
+#include "mozilla/Components.h"
+#include "nsIURI.h"
+#include "nsReadableUtils.h"
+#include "nsArrayUtils.h"
+#include "prnetdb.h"
+#include "prenv.h"
+#include "nsPrintfCString.h"
+#include "nsNetCID.h"
+#include "nsNetUtil.h"
+#include "nsISupportsPrimitives.h"
+#include "nsIGSettingsService.h"
+#include "nsInterfaceHashtable.h"
+#include "mozilla/Attributes.h"
+#include "nsIURI.h"
+
+using namespace mozilla;
+
+class nsUnixSystemProxySettings final : public nsISystemProxySettings {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSISYSTEMPROXYSETTINGS
+
+  nsUnixSystemProxySettings() : mSchemeProxySettings(4) {}
+  void Init();
+
+ private:
+  ~nsUnixSystemProxySettings() = default;
+
+  nsCOMPtr<nsIGSettingsService> mGSettings;
+  nsCOMPtr<nsIGSettingsCollection> mProxySettings;
+  nsInterfaceHashtable<nsCStringHashKey, nsIGSettingsCollection>
+      mSchemeProxySettings;
+  nsresult GetProxyFromGSettings(const nsACString& aScheme,
+                                 const nsACString& aHost, int32_t aPort,
+                                 nsACString& aResult);
+  nsresult SetProxyResultFromGSettings(const char* aKeyBase, const char* aType,
+                                       nsACString& aResult);
+};
+
+NS_IMPL_ISUPPORTS(nsUnixSystemProxySettings, nsISystemProxySettings)
+
+NS_IMETHODIMP
+nsUnixSystemProxySettings::GetMainThreadOnly(bool* aMainThreadOnly) {
+  // dbus prevents us from being threadsafe, but this routine should not block
+  // anyhow
+  *aMainThreadOnly = true;
+  return NS_OK;
+}
+
+void nsUnixSystemProxySettings::Init() {
+  mGSettings = do_GetService(NS_GSETTINGSSERVICE_CONTRACTID);
+  if (mGSettings) {
+    mGSettings->GetCollectionForSchema("org.gnome.system.proxy"_ns,
+                                       getter_AddRefs(mProxySettings));
+  }
+}
+
+nsresult nsUnixSystemProxySettings::GetPACURI(nsACString& aResult) {
+  if (mProxySettings) {
+    nsCString proxyMode;
+    // Check if mode is auto
+    nsresult rv = mProxySettings->GetString("mode"_ns, proxyMode);
+    if (rv == NS_OK && proxyMode.EqualsLiteral("auto")) {
+      return mProxySettings->GetString("autoconfig-url"_ns, aResult);
+    }
+  }
+
+  // Return an empty string when auto mode is not set.
+  aResult.Truncate();
+  return NS_OK;
+}
+
+static bool IsInNoProxyList(const nsACString& aHost, int32_t aPort,
+                            const char* noProxyVal) {
+  NS_ASSERTION(aPort >= 0, "Negative port?");
+
+  nsAutoCString noProxy(noProxyVal);
+  if (noProxy.EqualsLiteral("*")) return true;
+
+  noProxy.StripWhitespace();
+
+  nsReadingIterator<char> pos;
+  nsReadingIterator<char> end;
+  noProxy.BeginReading(pos);
+  noProxy.EndReading(end);
+  while (pos != end) {
+    nsReadingIterator<char> last = pos;
+    nsReadingIterator<char> nextPos;
+    if (FindCharInReadable(',', last, end)) {
+      nextPos = last;
+      ++nextPos;
+    } else {
+      last = end;
+      nextPos = end;
+    }
+
+    nsReadingIterator<char> colon = pos;
+    int32_t port = -1;
+    if (FindCharInReadable(':', colon, last)) {
+      ++colon;
+      nsDependentCSubstring portStr(colon, last);
+      nsAutoCString portStr2(
+          portStr);  // We need this for ToInteger. String API's suck.
+      nsresult err;
+      port = portStr2.ToInteger(&err);
+      if (NS_FAILED(err)) {
+        port = -2;  // don't match any port, so we ignore this pattern
+      }
+      --colon;
+    } else {
+      colon = last;
+    }
+
+    if (port == -1 || port == aPort) {
+      nsDependentCSubstring hostStr(pos, colon);
+      // By using StringEndsWith instead of an equality comparator, we can
+      // include sub-domains
+      if (StringEndsWith(aHost, hostStr, nsCaseInsensitiveCStringComparator))
+        return true;
+    }
+
+    pos = nextPos;
+  }
+
+  return false;
+}
+
+static void SetProxyResult(const char* aType, const nsACString& aHost,
+                           int32_t aPort, nsACString& aResult) {
+  aResult.AssignASCII(aType);
+  aResult.Append(' ');
+  aResult.Append(aHost);
+  if (aPort > 0) {
+    aResult.Append(':');
+    aResult.AppendInt(aPort);
+  }
+}
+
+static void SetProxyResultDirect(nsACString& aResult) {
+  aResult.AssignLiteral("DIRECT");
+}
+
+static nsresult GetProxyFromEnvironment(const nsACString& aScheme,
+                                        const nsACString& aHost, int32_t aPort,
+                                        nsACString& aResult) {
+  nsAutoCString envVar;
+  envVar.Append(aScheme);
+  envVar.AppendLiteral("_proxy");
+  const char* proxyVal = PR_GetEnv(envVar.get());
+  if (!proxyVal) {
+    proxyVal = PR_GetEnv("all_proxy");
+    if (!proxyVal) {
+      // Return failure so that the caller can detect the failure and
+      // fall back to other proxy detection (e.g., WPAD)
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  const char* noProxyVal = PR_GetEnv("no_proxy");
+  if (noProxyVal && IsInNoProxyList(aHost, aPort, noProxyVal)) {
+    SetProxyResultDirect(aResult);
+    return NS_OK;
+  }
+
+  // Use our URI parser to crack the proxy URI
+  nsCOMPtr<nsIURI> proxyURI;
+  nsresult rv = NS_NewURI(getter_AddRefs(proxyURI), proxyVal);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Is there a way to specify "socks://" or something in these environment
+  // variables? I can't find any documentation.
+  if (!proxyURI->SchemeIs("http")) {
+    return NS_ERROR_UNKNOWN_PROTOCOL;
+  }
+
+  nsAutoCString proxyHost;
+  rv = proxyURI->GetHost(proxyHost);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  int32_t proxyPort;
+  rv = proxyURI->GetPort(&proxyPort);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  SetProxyResult("PROXY", proxyHost, proxyPort, aResult);
+  return NS_OK;
+}
+
+nsresult nsUnixSystemProxySettings::SetProxyResultFromGSettings(
+    const char* aKeyBase, const char* aType, nsACString& aResult) {
+  nsDependentCString key(aKeyBase);
+
+  nsCOMPtr<nsIGSettingsCollection> proxy_settings =
+      mSchemeProxySettings.Get(key);
+  nsresult rv;
+  if (!proxy_settings) {
+    rv =
+        mGSettings->GetCollectionForSchema(key, getter_AddRefs(proxy_settings));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    mSchemeProxySettings.Put(key, proxy_settings);
+  }
+
+  nsAutoCString host;
+  rv = proxy_settings->GetString("host"_ns, host);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (host.IsEmpty()) return NS_ERROR_FAILURE;
+
+  int32_t port;
+  rv = proxy_settings->GetInt("port"_ns, &port);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  /* When port is 0, proxy is not considered as enabled even if host is set. */
+  if (port == 0) return NS_ERROR_FAILURE;
+
+  SetProxyResult(aType, host, port, aResult);
+  return NS_OK;
+}
+
+/* copied from nsProtocolProxyService.cpp --- we should share this! */
+static void proxy_MaskIPv6Addr(PRIPv6Addr& addr, uint16_t mask_len) {
+  if (mask_len == 128) return;
+
+  if (mask_len > 96) {
+    addr.pr_s6_addr32[3] =
+        PR_htonl(PR_ntohl(addr.pr_s6_addr32[3]) & (~0L << (128 - mask_len)));
+  } else if (mask_len > 64) {
+    addr.pr_s6_addr32[3] = 0;
+    addr.pr_s6_addr32[2] =
+        PR_htonl(PR_ntohl(addr.pr_s6_addr32[2]) & (~0L << (96 - mask_len)));
+  } else if (mask_len > 32) {
+    addr.pr_s6_addr32[3] = 0;
+    addr.pr_s6_addr32[2] = 0;
+    addr.pr_s6_addr32[1] =
+        PR_htonl(PR_ntohl(addr.pr_s6_addr32[1]) & (~0L << (64 - mask_len)));
+  } else {
+    addr.pr_s6_addr32[3] = 0;
+    addr.pr_s6_addr32[2] = 0;
+    addr.pr_s6_addr32[1] = 0;
+    addr.pr_s6_addr32[0] =
+        PR_htonl(PR_ntohl(addr.pr_s6_addr32[0]) & (~0L << (32 - mask_len)));
+  }
+}
+
+static bool ConvertToIPV6Addr(const nsACString& aName, PRIPv6Addr* aAddr,
+                              int32_t* aMask) {
+  PRNetAddr addr;
+  // try to convert hostname to IP
+  if (PR_StringToNetAddr(PromiseFlatCString(aName).get(), &addr) != PR_SUCCESS)
+    return false;
+
+  // convert parsed address to IPv6
+  if (addr.raw.family == PR_AF_INET) {
+    // convert to IPv4-mapped address
+    PR_ConvertIPv4AddrToIPv6(addr.inet.ip, aAddr);
+    if (aMask) {
+      if (*aMask <= 32)
+        *aMask += 96;
+      else
+        return false;
+    }
+  } else if (addr.raw.family == PR_AF_INET6) {
+    // copy the address
+    memcpy(aAddr, &addr.ipv6.ip, sizeof(PRIPv6Addr));
+  } else {
+    return false;
+  }
+
+  return true;
+}
+
+static bool HostIgnoredByProxy(const nsACString& aIgnore,
+                               const nsACString& aHost) {
+  if (aIgnore.Equals(aHost, nsCaseInsensitiveCStringComparator)) return true;
+
+  if (aIgnore.First() == '*' &&
+      StringEndsWith(aHost, nsDependentCSubstring(aIgnore, 1),
+                     nsCaseInsensitiveCStringComparator))
+    return true;
+
+  int32_t mask = 128;
+  nsReadingIterator<char> start;
+  nsReadingIterator<char> slash;
+  nsReadingIterator<char> end;
+  aIgnore.BeginReading(start);
+  aIgnore.BeginReading(slash);
+  aIgnore.EndReading(end);
+  if (FindCharInReadable('/', slash, end)) {
+    ++slash;
+    nsDependentCSubstring maskStr(slash, end);
+    nsAutoCString maskStr2(maskStr);
+    nsresult err;
+    mask = maskStr2.ToInteger(&err);
+    if (NS_FAILED(err)) {
+      mask = 128;
+    }
+    --slash;
+  } else {
+    slash = end;
+  }
+
+  nsDependentCSubstring ignoreStripped(start, slash);
+  PRIPv6Addr ignoreAddr, hostAddr;
+  if (!ConvertToIPV6Addr(ignoreStripped, &ignoreAddr, &mask) ||
+      !ConvertToIPV6Addr(aHost, &hostAddr, nullptr))
+    return false;
+
+  proxy_MaskIPv6Addr(ignoreAddr, mask);
+  proxy_MaskIPv6Addr(hostAddr, mask);
+
+  return memcmp(&ignoreAddr, &hostAddr, sizeof(PRIPv6Addr)) == 0;
+}
+
+nsresult nsUnixSystemProxySettings::GetProxyFromGSettings(
+    const nsACString& aScheme, const nsACString& aHost, int32_t aPort,
+    nsACString& aResult) {
+  nsCString proxyMode;
+  nsresult rv = mProxySettings->GetString("mode"_ns, proxyMode);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // return NS_ERROR_FAILURE when no proxy is set
+  if (!proxyMode.EqualsLiteral("manual")) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsCOMPtr<nsIArray> ignoreList;
+  if (NS_SUCCEEDED(mProxySettings->GetStringList("ignore-hosts"_ns,
+                                                 getter_AddRefs(ignoreList))) &&
+      ignoreList) {
+    uint32_t len = 0;
+    ignoreList->GetLength(&len);
+    for (uint32_t i = 0; i < len; ++i) {
+      nsCOMPtr<nsISupportsCString> str = do_QueryElementAt(ignoreList, i);
+      if (str) {
+        nsCString s;
+        if (NS_SUCCEEDED(str->GetData(s)) && !s.IsEmpty()) {
+          if (HostIgnoredByProxy(s, aHost)) {
+            SetProxyResultDirect(aResult);
+            return NS_OK;
+          }
+        }
+      }
+    }
+  }
+
+  if (aScheme.LowerCaseEqualsLiteral("http")) {
+    rv = SetProxyResultFromGSettings("org.gnome.system.proxy.http", "PROXY",
+                                     aResult);
+  } else if (aScheme.LowerCaseEqualsLiteral("https")) {
+    rv = SetProxyResultFromGSettings("org.gnome.system.proxy.https", "PROXY",
+                                     aResult);
+    /* Try to use HTTP proxy when HTTPS proxy is not explicitly defined */
+    if (rv != NS_OK)
+      rv = SetProxyResultFromGSettings("org.gnome.system.proxy.http", "PROXY",
+                                       aResult);
+  } else if (aScheme.LowerCaseEqualsLiteral("ftp")) {
+    rv = SetProxyResultFromGSettings("org.gnome.system.proxy.ftp", "PROXY",
+                                     aResult);
+  } else {
+    rv = NS_ERROR_FAILURE;
+  }
+  if (rv != NS_OK) {
+    /* If proxy for scheme is not specified, use SOCKS proxy for all schemes */
+    rv = SetProxyResultFromGSettings("org.gnome.system.proxy.socks", "SOCKS",
+                                     aResult);
+  }
+
+  if (NS_FAILED(rv)) {
+    SetProxyResultDirect(aResult);
+  }
+
+  return NS_OK;
+}
+
+nsresult nsUnixSystemProxySettings::GetProxyForURI(const nsACString& aSpec,
+                                                   const nsACString& aScheme,
+                                                   const nsACString& aHost,
+                                                   const int32_t aPort,
+                                                   nsACString& aResult) {
+  if (mProxySettings) {
+    nsresult rv = GetProxyFromGSettings(aScheme, aHost, aPort, aResult);
+    if (NS_SUCCEEDED(rv)) return rv;
+  }
+
+  return GetProxyFromEnvironment(aScheme, aHost, aPort, aResult);
+}
+
+NS_IMPL_COMPONENT_FACTORY(nsUnixSystemProxySettings) {
+  auto result = MakeRefPtr<nsUnixSystemProxySettings>();
+  result->Init();
+  return result.forget().downcast<nsISupports>();
+}