Examples with SmsCbLocation android.telephony.SmsCbLocation used on opensource projects

Example 1 with SmsCbLocation

use of android.telephony.SmsCbLocation in project android_frameworks_opt_telephony by LineageOS.

the class GsmCellBroadcastHandler method handleGsmBroadcastSms.

/**
 * Handle 3GPP format SMS-CB message.
 * @param ar the AsyncResult containing the received PDUs
 */
private SmsCbMessage handleGsmBroadcastSms(AsyncResult ar) {
    try {
        byte[] receivedPdu = (byte[]) ar.result;
        if (VDBG) {
            int pduLength = receivedPdu.length;
            for (int i = 0; i < pduLength; i += 8) {
                StringBuilder sb = new StringBuilder("SMS CB pdu data: ");
                for (int j = i; j < i + 8 && j < pduLength; j++) {
                    int b = receivedPdu[j] & 0xff;
                    if (b < 0x10) {
                        sb.append('0');
                    }
                    sb.append(Integer.toHexString(b)).append(' ');
                }
                log(sb.toString());
            }
        }
        SmsCbHeader header = new SmsCbHeader(receivedPdu);
        String plmn = TelephonyManager.from(mContext).getNetworkOperatorForPhone(mPhone.getPhoneId());
        int lac = -1;
        int cid = -1;
        CellLocation cl = mPhone.getCellLocation();
        // both 3GPP and 3GPP2 format messages
        if (cl instanceof GsmCellLocation) {
            GsmCellLocation cellLocation = (GsmCellLocation) cl;
            lac = cellLocation.getLac();
            cid = cellLocation.getCid();
        }
        SmsCbLocation location;
        switch(header.getGeographicalScope()) {
            case SmsCbMessage.GEOGRAPHICAL_SCOPE_LA_WIDE:
                location = new SmsCbLocation(plmn, lac, -1);
                break;
            case SmsCbMessage.GEOGRAPHICAL_SCOPE_CELL_WIDE:
            case SmsCbMessage.GEOGRAPHICAL_SCOPE_CELL_WIDE_IMMEDIATE:
                location = new SmsCbLocation(plmn, lac, cid);
                break;
            case SmsCbMessage.GEOGRAPHICAL_SCOPE_PLMN_WIDE:
            default:
                location = new SmsCbLocation(plmn);
                break;
        }
        byte[][] pdus;
        int pageCount = header.getNumberOfPages();
        if (pageCount > 1) {
            // Multi-page message
            SmsCbConcatInfo concatInfo = new SmsCbConcatInfo(header, location);
            // Try to find other pages of the same message
            pdus = mSmsCbPageMap.get(concatInfo);
            if (pdus == null) {
                // This is the first page of this message, make room for all
                // pages and keep until complete
                pdus = new byte[pageCount][];
                mSmsCbPageMap.put(concatInfo, pdus);
            }
            // Page parameter is one-based
            pdus[header.getPageIndex() - 1] = receivedPdu;
            for (byte[] pdu : pdus) {
                if (pdu == null) {
                    // Still missing pages, exit
                    return null;
                }
            }
            // Message complete, remove and dispatch
            mSmsCbPageMap.remove(concatInfo);
        } else {
            // Single page message
            pdus = new byte[1][];
            pdus[0] = receivedPdu;
        }
        // Remove messages that are out of scope to prevent the map from
        // growing indefinitely, containing incomplete messages that were
        // never assembled
        Iterator<SmsCbConcatInfo> iter = mSmsCbPageMap.keySet().iterator();
        while (iter.hasNext()) {
            SmsCbConcatInfo info = iter.next();
            if (!info.matchesLocation(plmn, lac, cid)) {
                iter.remove();
            }
        }
        return GsmSmsCbMessage.createSmsCbMessage(mContext, header, location, pdus);
    } catch (RuntimeException e) {
        loge("Error in decoding SMS CB pdu", e);
        return null;
    }
}