ussd: Suppress error dialog when ussd release received

Remove the prompt sent when network releases USSD session

Bug: 17782840
Change-Id: I4ca1d6db3be89ce2f28986cbc96824276edc6c7f

3 files changed, 31 insertions, 3 deletions

diff --git a/src/java/com/android/internal/telephony/CommandsInterface.java b/src/java/com/android/internal/telephony/CommandsInterface.java
index 07662aa91..a2cbf9651 100644
--- a/src/java/com/android/internal/telephony/CommandsInterface.java
+++ b/src/java/com/android/internal/telephony/CommandsInterface.java
@@ -94,8 +94,12 @@ public interface CommandsInterface {
 
     // Numeric representation of string values returned
     // by messages sent to setOnUSSD handler
-    static final int USSD_MODE_NOTIFY       = 0;
-    static final int USSD_MODE_REQUEST      = 1;
+    static final int USSD_MODE_NOTIFY        = 0;
+    static final int USSD_MODE_REQUEST       = 1;
+    static final int USSD_MODE_NW_RELEASE    = 2;
+    static final int USSD_MODE_LOCAL_CLIENT  = 3;
+    static final int USSD_MODE_NOT_SUPPORTED = 4;
+    static final int USSD_MODE_NW_TIMEOUT    = 5;
 
     // GSM SMS fail cause for acknowledgeLastIncomingSMS. From TS 23.040, 9.2.3.22.
     static final int GSM_SMS_FAIL_CAUSE_MEMORY_CAPACITY_EXCEEDED    = 0xD3;
diff --git a/src/java/com/android/internal/telephony/gsm/GSMPhone.java b/src/java/com/android/internal/telephony/gsm/GSMPhone.java
index f96fdc298..272dfc8f3 100644
--- a/src/java/com/android/internal/telephony/gsm/GSMPhone.java
+++ b/src/java/com/android/internal/telephony/gsm/GSMPhone.java
@@ -1322,6 +1322,7 @@ public class GSMPhone extends PhoneBase {
     onIncomingUSSD (int ussdMode, String ussdMessage) {
         boolean isUssdError;
         boolean isUssdRequest;
+        boolean isUssdRelease;
 
         isUssdRequest
             = (ussdMode == CommandsInterface.USSD_MODE_REQUEST);
@@ -1330,6 +1331,8 @@ public class GSMPhone extends PhoneBase {
             = (ussdMode != CommandsInterface.USSD_MODE_NOTIFY
                 && ussdMode != CommandsInterface.USSD_MODE_REQUEST);
 
+        isUssdRelease = (ussdMode == CommandsInterface.USSD_MODE_NW_RELEASE);
+
         // See comments in GsmMmiCode.java
         // USSD requests aren't finished until one
         // of these two events happen
@@ -1344,7 +1347,9 @@ public class GSMPhone extends PhoneBase {
         if (found != null) {
             // Complete pending USSD
 
-            if (isUssdError) {
+            if (isUssdRelease) {
+                found.onUssdRelease();
+            } else if (isUssdError) {
                 found.onUssdFinishedError();
             } else {
                 found.onUssdFinished(ussdMessage, isUssdRequest);
diff --git a/src/java/com/android/internal/telephony/gsm/GsmMmiCode.java b/src/java/com/android/internal/telephony/gsm/GsmMmiCode.java
index 90e783e13..0e7885a15 100644
--- a/src/java/com/android/internal/telephony/gsm/GsmMmiCode.java
+++ b/src/java/com/android/internal/telephony/gsm/GsmMmiCode.java
@@ -898,6 +898,25 @@ public final class GsmMmiCode extends Handler implements MmiCode {
         }
     }
 
+    /**
+     * Called from GSMPhone
+     *
+     * An unsolicited USSD NOTIFY or REQUEST has come in matching
+     * up with this pending USSD request
+     *
+     * Note: If REQUEST, this exchange is complete, but the session remains
+     *       active (ie, the network expects user input).
+     */
+    void
+    onUssdRelease() {
+        if (mState == State.PENDING) {
+            mState = State.COMPLETE;
+            mMessage = null;
+
+            mPhone.onMMIDone(this);
+        }
+    }
+
     void sendUssd(String ussdMessage) {
         // Treat this as a USSD string
         mIsPendingUSSD = true;