Add EAP methods in wifi.proto

To help find the root cause of high authentication failure rate in enterprise network, add EAP method and authentication phase2 method in connection event metrics.

Bug: 150237135
Test: manual
Test: atest com.android.server.wifi
Merged-In: I7f3268b2842783f99c0a43d8b4996d0a7dd46c6e
Change-Id: Id4ac7947871785d16b81c0806986f54d64fdb0ce

proto/src/wifi.proto

@@ -635,6 +635,66 @@ message RouterFingerPrint {
     ROUTER_TECH_OTHER = 6;
   }
 
+  enum EapMethod {
+
+    // No EAP method used
+    TYPE_EAP_UNKNOWN = 0;
+
+    // EAP with Transport Layer Security
+    TYPE_EAP_TLS = 1;
+
+    // EAP with Tunneled Transport Layer Security
+    TYPE_EAP_TTLS = 2;
+
+    // EAP with Subscriber Identity Module [RFC-4186]
+    TYPE_EAP_SIM = 3;
+
+    // EAP with Authentication and Key Agreement [RFC-4187]
+    TYPE_EAP_AKA = 4;
+
+    // EAP with Authentication and Key Agreement Prime [RFC-5448]
+    TYPE_EAP_AKA_PRIME = 5;
+
+    // Protected EAP
+    TYPE_EAP_PEAP = 6;
+
+    // EAP for Hotspot 2.0 r2 OSEN
+    TYPE_EAP_UNAUTH_TLS = 7;
+
+    // EAP with Password
+    TYPE_EAP_PWD = 8;
+
+    // EAP with WAPI certifcate
+    TYPE_EAP_WAPI_CERT = 9;
+  }
+
+  enum AuthPhase2Method {
+
+    // No phase2 method
+    TYPE_PHASE2_NONE = 0;
+
+    // Password Authentication Protocol
+    TYPE_PHASE2_PAP = 1;
+
+    // Microsoft Challenge Handshake Authentication Protocol
+    TYPE_PHASE2_MSCHAP = 2;
+
+    // Microsoft Challenge Handshake Authentication Protocol v2
+    TYPE_PHASE2_MSCHAPV2 = 3;
+
+    // Generic Token Card
+    TYPE_PHASE2_GTC = 4;
+
+    // EAP-Subscriber Identity Module [RFC-4186]
+    TYPE_PHASE2_SIM = 5;
+
+    // EAP-Authentication and Key Agreement [RFC-4187]
+    TYPE_PHASE2_AKA = 6;
+
+    // EAP-Authentication and Key Agreement Prime [RFC-5448]
+    TYPE_PHASE2_AKA_PRIME   = 7;
+  }
+
   optional RoamType roam_type = 1;
 
   // Channel on which the connection takes place.
@@ -657,6 +717,12 @@ message RouterFingerPrint {
 
   // If the router is a passpoint / hotspot 2.0 network
   optional bool passpoint = 8;
+
+  // EAP method used by the enterprise network
+  optional EapMethod eap_method = 9;
+
+  // Phase 2 authentication method after setting up a secure channel
+  optional AuthPhase2Method auth_phase2_method = 10;
 }
 
 message ConnectionEvent {