passpoint: skip NAI realms match in case of 3GPP element match

From O, EAP-AKA/SIM for T-mobile has been broken with Boingo AP.
For Boingo AP, NAI realm ANQP element doesn't contain realm matching
PLMN ID(MNC/MCC) from SIM on the device.
Because of this, current design can't find the Boingo AP as roaming partner with
T-mobile even though 3GPP Celluar Network ANQP element is already matched with
MCC/MNC from SIM on the device.
In case of 3GPP element match, it is considered as roaming partner
regardless of NAI realm match

Bug: 80527981
Test: ./frameworks/opt/net/wifi/tests/wifitests/runtests.sh
Test: live test with OSU AP
Change-Id: Iedb9b26873779070c0b08a0b4ff3c4e96a5bdcb9
Signed-off-by: Ecco Park <eccopark@google.com>
(cherry picked from commit d085366918fa9a1db977993eb859e790180508aa)

1 files changed, 15 insertions, 12 deletions

diff --git a/service/java/com/android/server/wifi/hotspot2/PasspointProvider.java b/service/java/com/android/server/wifi/hotspot2/PasspointProvider.java
index f86a938d7..6d09a29ca 100644
--- a/service/java/com/android/server/wifi/hotspot2/PasspointProvider.java
+++ b/service/java/com/android/server/wifi/hotspot2/PasspointProvider.java
@@ -259,24 +259,32 @@ public class PasspointProvider {
      */
     public PasspointMatch match(Map<ANQPElementType, ANQPElement> anqpElements,
             RoamingConsortium roamingConsortium) {
-        PasspointMatch providerMatch = matchProvider(anqpElements, roamingConsortium);
+        PasspointMatch providerMatch = matchProviderExceptFor3GPP(anqpElements, roamingConsortium);
+
+        // 3GPP Network matching.
+        if (providerMatch == PasspointMatch.None && ANQPMatcher.matchThreeGPPNetwork(
+                (ThreeGPPNetworkElement) anqpElements.get(ANQPElementType.ANQP3GPPNetwork),
+                mImsiParameter, mMatchingSIMImsiList)) {
+            return PasspointMatch.RoamingProvider;
+        }
 
         // Perform authentication match against the NAI Realm.
         int authMatch = ANQPMatcher.matchNAIRealm(
                 (NAIRealmElement) anqpElements.get(ANQPElementType.ANQPNAIRealm),
                 mConfig.getCredential().getRealm(), mEAPMethodID, mAuthParam);
 
-        // Auth mismatch, demote provider match.
+        // In case of Auth mismatch, demote provider match.
         if (authMatch == AuthMatch.NONE) {
             return PasspointMatch.None;
         }
 
-        // No realm match, return provider match as is.
+        // In case of no realm match, return provider match as is.
         if ((authMatch & AuthMatch.REALM) == 0) {
             return providerMatch;
         }
 
-        // Realm match, promote provider match to roaming if no other provider match is found.
+        // Promote the provider match to roaming provider if provider match is not found, but NAI
+        // realm is matched.
         return providerMatch == PasspointMatch.None ? PasspointMatch.RoamingProvider
                 : providerMatch;
     }
@@ -454,13 +462,14 @@ public class PasspointProvider {
     }
 
     /**
-     * Perform a provider match based on the given ANQP elements.
+     * Perform a provider match based on the given ANQP elements except for matching 3GPP Network.
      *
      * @param anqpElements List of ANQP elements
      * @param roamingConsortium Roaming Consortium information element from the AP
      * @return {@link PasspointMatch}
      */
-    private PasspointMatch matchProvider(Map<ANQPElementType, ANQPElement> anqpElements,
+    private PasspointMatch matchProviderExceptFor3GPP(
+            Map<ANQPElementType, ANQPElement> anqpElements,
             RoamingConsortium roamingConsortium) {
         // Domain name matching.
         if (ANQPMatcher.matchDomainName(
@@ -489,12 +498,6 @@ public class PasspointProvider {
             }
         }
 
-        // 3GPP Network matching.
-        if (ANQPMatcher.matchThreeGPPNetwork(
-                (ThreeGPPNetworkElement) anqpElements.get(ANQPElementType.ANQP3GPPNetwork),
-                mImsiParameter, mMatchingSIMImsiList)) {
-            return PasspointMatch.RoamingProvider;
-        }
         return PasspointMatch.None;
     }