diff options
| -rw-r--r-- | api/system-current.txt | 1 | ||||
| -rw-r--r-- | telephony/java/android/telephony/CarrierRestrictionRules.java | 122 |
2 files changed, 123 insertions, 0 deletions
diff --git a/api/system-current.txt b/api/system-current.txt index e75dabae3048..4243780fcc17 100644 --- a/api/system-current.txt +++ b/api/system-current.txt @@ -5529,6 +5529,7 @@ package android.telephony { method @NonNull public java.util.List<android.service.carrier.CarrierIdentifier> getExcludedCarriers(); method public int getMultiSimPolicy(); method public boolean isAllCarriersAllowed(); + method public java.util.List<java.lang.Boolean> isCarrierIdentifiersAllowed(@NonNull java.util.List<android.service.carrier.CarrierIdentifier>); method public void writeToParcel(android.os.Parcel, int); field public static final int CARRIER_RESTRICTION_DEFAULT_ALLOWED = 1; // 0x1 field public static final int CARRIER_RESTRICTION_DEFAULT_NOT_ALLOWED = 0; // 0x0 diff --git a/telephony/java/android/telephony/CarrierRestrictionRules.java b/telephony/java/android/telephony/CarrierRestrictionRules.java index 37847aef9167..d47b55ca4372 100644 --- a/telephony/java/android/telephony/CarrierRestrictionRules.java +++ b/telephony/java/android/telephony/CarrierRestrictionRules.java @@ -27,6 +27,7 @@ import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.util.ArrayList; import java.util.List; +import java.util.Objects; /** * Contains the list of carrier restrictions. @@ -93,6 +94,9 @@ public final class CarrierRestrictionRules implements Parcelable { value = {CARRIER_RESTRICTION_DEFAULT_NOT_ALLOWED, CARRIER_RESTRICTION_DEFAULT_ALLOWED}) public @interface CarrierRestrictionDefault {} + /* Wild character for comparison */ + private static final char WILD_CHARACTER = '?'; + private List<CarrierIdentifier> mAllowedCarriers; private List<CarrierIdentifier> mExcludedCarriers; @CarrierRestrictionDefault @@ -166,6 +170,124 @@ public final class CarrierRestrictionRules implements Parcelable { } /** + * Tests an array of carriers with the carrier restriction configuration. The list of carrier + * ids passed as argument does not need to be the same as currently present in the device. + * + * @param carrierIds list of {@link CarrierIdentifier}, one for each SIM slot on the device + * @return a list of boolean with the same size as input, indicating if each + * {@link CarrierIdentifier} is allowed or not. + */ + public List<Boolean> isCarrierIdentifiersAllowed(@NonNull List<CarrierIdentifier> carrierIds) { + ArrayList<Boolean> result = new ArrayList<>(carrierIds.size()); + + // First calculate the result for each slot independently + for (int i = 0; i < carrierIds.size(); i++) { + boolean inAllowedList = isCarrierIdInList(carrierIds.get(i), mAllowedCarriers); + boolean inExcludedList = isCarrierIdInList(carrierIds.get(i), mExcludedCarriers); + if (mCarrierRestrictionDefault == CARRIER_RESTRICTION_DEFAULT_NOT_ALLOWED) { + result.add((inAllowedList && !inExcludedList) ? true : false); + } else { + result.add((inExcludedList && !inAllowedList) ? false : true); + } + } + // Apply the multi-slot policy, if needed. + if (mMultiSimPolicy == MULTISIM_POLICY_ONE_VALID_SIM_MUST_BE_PRESENT) { + for (boolean b : result) { + if (b) { + result.replaceAll(x -> true); + break; + } + } + } + return result; + } + + /** + * Indicates if a certain carrier {@code id} is present inside a {@code list} + * + * @return true if the carrier {@code id} is present, false otherwise + */ + private static boolean isCarrierIdInList(CarrierIdentifier id, List<CarrierIdentifier> list) { + for (CarrierIdentifier listItem : list) { + // Compare MCC and MNC + if (!patternMatch(id.getMcc(), listItem.getMcc()) + || !patternMatch(id.getMnc(), listItem.getMnc())) { + continue; + } + + // Compare SPN. Comparison is on the complete strings, case insensitive and with wild + // characters. + String listItemValue = convertNullToEmpty(listItem.getSpn()); + String idValue = convertNullToEmpty(id.getSpn()); + if (!listItemValue.isEmpty()) { + if (!patternMatch(idValue, listItemValue)) { + continue; + } + } + + // The IMSI of the configuration can be shorter than actual IMSI in the SIM card. + listItemValue = convertNullToEmpty(listItem.getImsi()); + idValue = convertNullToEmpty(id.getImsi()); + if (!patternMatch( + idValue.substring(0, Math.min(idValue.length(), listItemValue.length())), + listItemValue)) { + continue; + } + + // The GID1 of the configuration can be shorter than actual GID1 in the SIM card. + listItemValue = convertNullToEmpty(listItem.getGid1()); + idValue = convertNullToEmpty(id.getGid1()); + if (!patternMatch( + idValue.substring(0, Math.min(idValue.length(), listItemValue.length())), + listItemValue)) { + continue; + } + + // The GID2 of the configuration can be shorter than actual GID2 in the SIM card. + listItemValue = convertNullToEmpty(listItem.getGid2()); + idValue = convertNullToEmpty(id.getGid2()); + if (!patternMatch( + idValue.substring(0, Math.min(idValue.length(), listItemValue.length())), + listItemValue)) { + continue; + } + + // Valid match was found in the list + return true; + } + return false; + } + + private static String convertNullToEmpty(String value) { + return Objects.toString(value, ""); + } + + /** + * Performs a case insensitive string comparison against a given pattern. The character '?' + * is used in the pattern as wild character in the comparison. The string must have the same + * length as the pattern. + * + * @param str string to match + * @param pattern string containing the pattern + * @return true in case of match, false otherwise + */ + private static boolean patternMatch(String str, String pattern) { + if (str.length() != pattern.length()) { + return false; + } + String lowerCaseStr = str.toLowerCase(); + String lowerCasePattern = pattern.toLowerCase(); + + for (int i = 0; i < lowerCasePattern.length(); i++) { + if (lowerCasePattern.charAt(i) != lowerCaseStr.charAt(i) + && lowerCasePattern.charAt(i) != WILD_CHARACTER) { + return false; + } + } + return true; + } + + /** * {@link Parcelable#writeToParcel} */ @Override |