From 0f697a56470ad110d4cd9e83fd58dd6742206fab Mon Sep 17 00:00:00 2001 From: Sukanya Rajkhowa Date: Mon, 20 Aug 2018 16:35:36 +0800 Subject: [PATCH] Telephony: Add 7bit Ascii support for long message Add 7bit Ascii encoding and decoding support for long messages Bug: 37289589 Test: atest FrameworksTelephonyTests Merged-In: I7c2cd91d0aef0d6436d250544db9bf2131e35075 Change-Id: I7c2cd91d0aef0d6436d250544db9bf2131e35075 --- .../telephony/CarrierConfigManager.java | 9 ++++ .../internal/telephony/cdma/BearerData.java | 50 +++++++++++++++++-- .../internal/telephony/cdma/SmsMessage.java | 5 +- 3 files changed, 59 insertions(+), 5 deletions(-) diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java index 190e82b6cc5b3..5c5d8569f3e8a 100644 --- a/telephony/java/android/telephony/CarrierConfigManager.java +++ b/telephony/java/android/telephony/CarrierConfigManager.java @@ -2370,6 +2370,14 @@ public class CarrierConfigManager { public static final String KEY_SUPPORT_EMERGENCY_DIALER_SHORTCUT_BOOL = "support_emergency_dialer_shortcut_bool"; + /** + * Support ASCII 7-BIT encoding for long SMS. This carrier config is used to enable + * this feature. + * @hide + */ + public static final String KEY_ASCII_7_BIT_SUPPORT_FOR_LONG_MESSAGE_BOOL = + "ascii_7_bit_support_for_long_message_bool"; + /** * Controls RSRP threshold at which OpportunisticNetworkService will decide whether * the opportunistic network is good enough for internet data. @@ -2780,6 +2788,7 @@ public class CarrierConfigManager { sDefaults.putBoolean(KEY_CALL_WAITING_OVER_UT_WARNING_BOOL, false); sDefaults.putBoolean(KEY_SUPPORT_CLIR_NETWORK_DEFAULT_BOOL, true); sDefaults.putBoolean(KEY_SUPPORT_EMERGENCY_DIALER_SHORTCUT_BOOL, true); + sDefaults.putBoolean(KEY_ASCII_7_BIT_SUPPORT_FOR_LONG_MESSAGE_BOOL, false); /* Default value is minimum RSRP level needed for SIGNAL_STRENGTH_GOOD */ sDefaults.putInt(KEY_OPPORTUNISTIC_NETWORK_ENTRY_THRESHOLD_RSRP_INT, -108); /* Default value is minimum RSRP level needed for SIGNAL_STRENGTH_MODERATE */ diff --git a/telephony/java/com/android/internal/telephony/cdma/BearerData.java b/telephony/java/com/android/internal/telephony/cdma/BearerData.java index a4cd56b9e3e26..694cc69c2b3f8 100644 --- a/telephony/java/com/android/internal/telephony/cdma/BearerData.java +++ b/telephony/java/com/android/internal/telephony/cdma/BearerData.java @@ -596,6 +596,45 @@ public final class BearerData { System.arraycopy(payload, 0, uData.payload, udhBytes, payload.length); } + private static void encode7bitAsciiEms(UserData uData, byte[] udhData, boolean force) + throws CodingException + { + try { + Rlog.d(LOG_TAG, "encode7bitAsciiEms"); + int udhBytes = udhData.length + 1; // Add length octet. + int udhSeptets = ((udhBytes * 8) + 6) / 7; + int paddingBits = (udhSeptets * 7) - (udhBytes * 8); + String msg = uData.payloadStr; + byte[] payload ; + int msgLen = msg.length(); + BitwiseOutputStream outStream = new BitwiseOutputStream(msgLen + + (paddingBits > 0 ? 1 : 0)); + outStream.write(paddingBits, 0); + for (int i = 0; i < msgLen; i++) { + int charCode = UserData.charToAscii.get(msg.charAt(i), -1); + if (charCode == -1) { + if (force) { + outStream.write(7, UserData.UNENCODABLE_7_BIT_CHAR); + } else { + throw new CodingException("cannot ASCII encode (" + msg.charAt(i) + ")"); + } + } else { + outStream.write(7, charCode); + } + } + payload = outStream.toByteArray(); + uData.msgEncoding = UserData.ENCODING_7BIT_ASCII; + uData.msgEncodingSet = true; + uData.numFields = udhSeptets + uData.payloadStr.length(); + uData.payload = new byte[udhBytes + payload.length]; + uData.payload[0] = (byte)udhData.length; + System.arraycopy(udhData, 0, uData.payload, 1, udhData.length); + System.arraycopy(payload, 0, uData.payload, udhBytes, payload.length); + } catch (BitwiseOutputStream.AccessException ex) { + throw new CodingException("7bit ASCII encode failed: " + ex); + } + } + private static void encodeEmsUserDataPayload(UserData uData) throws CodingException { @@ -605,6 +644,8 @@ public final class BearerData { encode7bitEms(uData, headerData, true); } else if (uData.msgEncoding == UserData.ENCODING_UNICODE_16) { encode16bitEms(uData, headerData); + } else if (uData.msgEncoding == UserData.ENCODING_7BIT_ASCII) { + encode7bitAsciiEms(uData, headerData, true); } else { throw new CodingException("unsupported EMS user data encoding (" + uData.msgEncoding + ")"); @@ -1056,15 +1097,18 @@ public final class BearerData { throws CodingException { try { - offset *= 8; + int offsetBits = offset * 8; + int offsetSeptets = (offsetBits + 6) / 7; + numFields -= offsetSeptets; + StringBuffer strBuf = new StringBuffer(numFields); BitwiseInputStream inStream = new BitwiseInputStream(data); - int wantedBits = (offset * 8) + (numFields * 7); + int wantedBits = (offsetSeptets * 7) + (numFields * 7); if (inStream.available() < wantedBits) { throw new CodingException("insufficient data (wanted " + wantedBits + " bits, but only have " + inStream.available() + ")"); } - inStream.skip(offset); + inStream.skip(offsetSeptets * 7); for (int i = 0; i < numFields; i++) { int charCode = inStream.read(7); if ((charCode >= UserData.ASCII_MAP_BASE_INDEX) && diff --git a/telephony/java/com/android/internal/telephony/cdma/SmsMessage.java b/telephony/java/com/android/internal/telephony/cdma/SmsMessage.java index 964a31304db59..4aa6f71a8187a 100644 --- a/telephony/java/com/android/internal/telephony/cdma/SmsMessage.java +++ b/telephony/java/com/android/internal/telephony/cdma/SmsMessage.java @@ -864,8 +864,9 @@ public class SmsMessage extends SmsMessageBase { } if (encodedBearerData == null) return null; - int teleservice = bearerData.hasUserDataHeader ? - SmsEnvelope.TELESERVICE_WEMT : SmsEnvelope.TELESERVICE_WMT; + int teleservice = (bearerData.hasUserDataHeader + && userData.msgEncoding != UserData.ENCODING_7BIT_ASCII) + ? SmsEnvelope.TELESERVICE_WEMT : SmsEnvelope.TELESERVICE_WMT; SmsEnvelope envelope = new SmsEnvelope(); envelope.messageType = SmsEnvelope.MESSAGE_TYPE_POINT_TO_POINT;