DivestOS/Patches/LineageOS-18.1/android_packages_providers_TelephonyProvider/312102.patch

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From 523729038f471ac87dce34f4a48ba4dcf5bfdd34 Mon Sep 17 00:00:00 2001
From: Mattias Nilsson <Mattias.Nilsson@sony.com>
Date: Thu, 15 Apr 2021 17:11:27 +0200
Subject: [PATCH] MNCs not in carrier_list can get the wrong MNC value
Mobile Network Codes that belong to SIM cards not specified
in carrier_list sometimes get the wrong MNC value.
This change aims to improve the likelihood of a
correct MNC.
Test: Install an RRO with apns.xml and look at the DB.
Bug: 186542894
Change-Id: I1dbccf9d75a7a8ae896ca483935bc5e007843e75
---
.../telephony/TelephonyProvider.java | 68 ++++++++++++++++---
1 file changed, 58 insertions(+), 10 deletions(-)
diff --git a/src/com/android/providers/telephony/TelephonyProvider.java b/src/com/android/providers/telephony/TelephonyProvider.java
index b1b3146d..6bddde93 100644
--- a/src/com/android/providers/telephony/TelephonyProvider.java
+++ b/src/com/android/providers/telephony/TelephonyProvider.java
@@ -260,6 +260,40 @@
private boolean mManagedApnEnforced;
+ /**
+ * Mobile country codes where there is a high likelyhood that the MNC has 3 digits
+ * and need one more prefix zero to set correct mobile network code value.
+ *
+ * Please note! The best solution is to add the MCCMNC combo to carrier id
+ * carrier_list, this is just a best effort.
+ */
+ private static final String[] COUNTRY_MCC_WITH_THREE_DIGIT_MNC = {
+ "302" // Canada
+ ,"310" // Guam, USA
+ ,"311" // USA
+ ,"312" // USA
+ ,"313" // USA
+ ,"316" // USA
+ ,"334" // Mexico
+ ,"338" // Bermuda, Jamaica
+ ,"342" // Barbados
+ ,"344" // Antigua and Barbuda
+ ,"346" // Cayman Islands
+ ,"348" // British Virgin Islands
+ ,"356" // Saint Kitts and Nevis
+ ,"358" // Saint Lucia
+ ,"360" // Saint Vincent and the Grenadines
+ ,"365" // Anguilla
+ ,"366" // Dominica
+ ,"376" // Turks and Caicos Islands
+ ,"405" // India
+ ,"708" // Honduras
+ ,"722" // Argentina
+ ,"732" // Colombia
+ ,"738" // Guyana
+ ,"750" // Falkland Islands
+ };
+
/**
* Available radio technologies for GSM, UMTS and CDMA.
* Duplicates the constants from hardware/radio/include/ril.h
@@ -4151,18 +4185,32 @@ private static String getBestStringMnc(Context context, String mcc, int mnc) {
}
String twoDigitMnc = String.format(Locale.getDefault(), "%02d", mnc);
String threeDigitMnc = "0" + twoDigitMnc;
+ boolean threeDigitNetworkCode =
+ Arrays.asList(COUNTRY_MCC_WITH_THREE_DIGIT_MNC).contains(mcc);
+ int twoDigitResult = countMccMncInCarrierList(context, mcc + twoDigitMnc);
+ int threeDigitResult = countMccMncInCarrierList(context, mcc + threeDigitMnc);
- try (
- Cursor twoDigitMncCursor = context.getContentResolver().query(
- Telephony.CarrierId.All.CONTENT_URI,
- /* projection */ null,
- /* selection */ Telephony.CarrierId.All.MCCMNC + "=?",
- /* selectionArgs */ new String[]{mcc + twoDigitMnc}, null)
- ) {
- if (twoDigitMncCursor.getCount() > 0) {
- return twoDigitMnc;
- }
+ if ((threeDigitResult > twoDigitResult) ||
+ (threeDigitNetworkCode && (twoDigitResult == threeDigitResult))) {
return threeDigitMnc;
+ } else {
+ return twoDigitMnc;
+ }
+ }
+
+ /**
+ * Check carrier_list how many mcc mnc combo matches there are
+ */
+ private static int countMccMncInCarrierList(Context ctx, String mccMncCombo) {
+ try (
+ Cursor mccMncCursor = ctx.getContentResolver().query(
+ Telephony.CarrierId.All.CONTENT_URI,
+ /* projection */ null,
+ /* selection */ Telephony.CarrierId.All.MCCMNC + "=?",
+ /* selectionArgs */ new String[]{mccMncCombo}, null);
+ )
+ {
+ return mccMncCursor.getCount();
}
}