diff -r 000000000000 -r 6474c204b198 dom/mobilemessage/src/gonk/SmsService.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/mobilemessage/src/gonk/SmsService.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,160 @@
+/* -*- 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 "SmsMessage.h"
+#include "SmsService.h"
+#include "SmsSegmentInfo.h"
+#include "mozilla/Preferences.h"
+#include "nsServiceManagerUtils.h"
+
+namespace {
+
+const char* kPrefRilNumRadioInterfaces = "ril.numRadioInterfaces";
+#define kPrefDefaultServiceId "dom.sms.defaultServiceId"
+const char* kObservedPrefs[] = {
+  kPrefDefaultServiceId,
+  nullptr
+};
+
+uint32_t
+getDefaultServiceId()
+{
+  int32_t id = mozilla::Preferences::GetInt(kPrefDefaultServiceId, 0);
+  int32_t numRil = mozilla::Preferences::GetInt(kPrefRilNumRadioInterfaces, 1);
+
+  if (id >= numRil || id < 0) {
+    id = 0;
+  }
+
+  return id;
+}
+
+} // Anonymous namespace
+
+namespace mozilla {
+namespace dom {
+namespace mobilemessage {
+
+NS_IMPL_ISUPPORTS(SmsService,
+                  nsISmsService,
+                  nsIObserver)
+
+SmsService::SmsService()
+{
+  mRil = do_GetService("@mozilla.org/ril;1");
+  NS_WARN_IF_FALSE(mRil, "This shouldn't fail!");
+
+  // Initialize observer.
+  Preferences::AddStrongObservers(this, kObservedPrefs);
+  mDefaultServiceId = getDefaultServiceId();
+}
+
+/*
+ * Implementation of nsIObserver.
+ */
+
+NS_IMETHODIMP
+SmsService::Observe(nsISupports* aSubject,
+                    const char* aTopic,
+                    const char16_t* aData)
+{
+  if (!strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID)) {
+    nsDependentString data(aData);
+    if (data.EqualsLiteral(kPrefDefaultServiceId)) {
+      mDefaultServiceId = getDefaultServiceId();
+    }
+    return NS_OK;
+  }
+
+  MOZ_ASSERT(false, "SmsService got unexpected topic!");
+  return NS_ERROR_UNEXPECTED;
+}
+
+/*
+ * Implementation of nsISmsService.
+ */
+
+NS_IMETHODIMP
+SmsService::GetSmsDefaultServiceId(uint32_t* aServiceId)
+{
+  *aServiceId = mDefaultServiceId;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SmsService::GetSegmentInfoForText(const nsAString& aText,
+                                  nsIMobileMessageCallback* aRequest)
+{
+  nsCOMPtr<nsIRadioInterface> radioInterface;
+  if (mRil) {
+    mRil->GetRadioInterface(0, getter_AddRefs(radioInterface));
+  }
+  NS_ENSURE_TRUE(radioInterface, NS_ERROR_FAILURE);
+
+  return radioInterface->GetSegmentInfoForText(aText, aRequest);
+}
+
+NS_IMETHODIMP
+SmsService::Send(uint32_t aServiceId,
+                 const nsAString& aNumber,
+                 const nsAString& aMessage,
+                 bool aSilent,
+                 nsIMobileMessageCallback* aRequest)
+{
+  nsCOMPtr<nsIRadioInterface> radioInterface;
+  if (mRil) {
+    mRil->GetRadioInterface(aServiceId, getter_AddRefs(radioInterface));
+  }
+  NS_ENSURE_TRUE(radioInterface, NS_ERROR_FAILURE);
+
+  return radioInterface->SendSMS(aNumber, aMessage, aSilent, aRequest);
+}
+
+NS_IMETHODIMP
+SmsService::IsSilentNumber(const nsAString& aNumber,
+                           bool*            aIsSilent)
+{
+  *aIsSilent = mSilentNumbers.Contains(aNumber);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SmsService::AddSilentNumber(const nsAString& aNumber)
+{
+  if (mSilentNumbers.Contains(aNumber)) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  NS_ENSURE_TRUE(mSilentNumbers.AppendElement(aNumber), NS_ERROR_FAILURE);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SmsService::RemoveSilentNumber(const nsAString& aNumber)
+{
+  if (!mSilentNumbers.Contains(aNumber)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  NS_ENSURE_TRUE(mSilentNumbers.RemoveElement(aNumber), NS_ERROR_FAILURE);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+SmsService::GetSmscAddress(uint32_t aServiceId,
+                           nsIMobileMessageCallback *aRequest)
+{
+  nsCOMPtr<nsIRadioInterface> radioInterface;
+  if (mRil) {
+    mRil->GetRadioInterface(aServiceId, getter_AddRefs(radioInterface));
+  }
+  NS_ENSURE_TRUE(radioInterface, NS_ERROR_FAILURE);
+
+  return radioInterface->GetSmscAddress(aRequest);
+}
+
+} // namespace mobilemessage
+} // namespace dom
+} // namespace mozilla