app-common/src/main/java/im/angry/openeuicc/core/DefaultEuiccChannelFactory.kt

@@ -20,8 +20,7 @@ open class DefaultEuiccChannelFactory(protected val context: Context) : EuiccCha
 
     override suspend fun tryOpenEuiccChannel(
         port: UiccPortInfoCompat,
-        isdrAid: ByteArray,
-        seId: Int,
+        isdrAid: ByteArray
     ): EuiccChannel? {
         if (port.portIndex != 0) {
             Log.w(
@@ -47,7 +46,6 @@ open class DefaultEuiccChannelFactory(protected val context: Context) : EuiccCha
                     context.preferenceRepository.verboseLoggingFlow
                 ),
                 isdrAid,
-                seId,
                 context.preferenceRepository.verboseLoggingFlow,
                 context.preferenceRepository.ignoreTLSCertificateFlow,
             ).also {
@@ -67,8 +65,7 @@ open class DefaultEuiccChannelFactory(protected val context: Context) : EuiccCha
 
     override fun tryOpenUsbEuiccChannel(
         ccidCtx: UsbCcidContext,
-        isdrAid: ByteArray,
-        seId: Int
+        isdrAid: ByteArray
     ): EuiccChannel? {
         try {
             return EuiccChannelImpl(
@@ -79,7 +76,6 @@ open class DefaultEuiccChannelFactory(protected val context: Context) : EuiccCha
                     ccidCtx
                 ),
                 isdrAid,
-                seId,
                 context.preferenceRepository.verboseLoggingFlow,
                 context.preferenceRepository.ignoreTLSCertificateFlow,
             )

app-common/src/main/java/im/angry/openeuicc/core/DefaultEuiccChannelManager.kt

@@ -32,7 +32,7 @@ open class DefaultEuiccChannelManager(
 
     private val channelCache = mutableListOf<EuiccChannel>()
 
-    private var usbChannels = mutableListOf<EuiccChannel>()
+    private var usbChannel: EuiccChannel? = null
 
     private val lock = Mutex()
 
@@ -51,17 +51,15 @@ open class DefaultEuiccChannelManager(
     protected open val uiccCards: Collection<UiccCardInfoCompat>
         get() = (0..<tm.activeModemCountCompat).map { FakeUiccCardInfoCompat(it) }
 
-    private suspend inline fun tryOpenChannelWithKnownAids(openFn: (ByteArray, Int) -> EuiccChannel?): List<EuiccChannel> {
+    private suspend inline fun tryOpenChannelFirstValidAid(openFn: (ByteArray) -> EuiccChannel?): EuiccChannel? {
         val isdrAidList =
             parseIsdrAidList(appContainer.preferenceRepository.isdrAidListFlow.first())
-        var seId = 0
 
-        return isdrAidList.mapNotNull {
-            Log.i(TAG, "Opening channel, trying ISDR AID ${it.encodeHex()}, this will be seId ${seId}")
+        return isdrAidList.firstNotNullOfOrNull {
+            Log.i(TAG, "Opening channel, trying ISDR AID ${it.encodeHex()}")
 
-            openFn(it, seId)?.let { channel ->
+            openFn(it)?.let { channel ->
                 if (channel.valid) {
-                    seId += 1
                     channel
                 } else {
                     channel.close()
@@ -71,15 +69,19 @@ open class DefaultEuiccChannelManager(
         }
     }
 
-    private suspend fun tryOpenEuiccChannel(port: UiccPortInfoCompat, seId: Int = 0): EuiccChannel? {
+    private suspend fun tryOpenEuiccChannel(port: UiccPortInfoCompat): EuiccChannel? {
         lock.withLock {
             if (port.card.physicalSlotIndex == EuiccChannelManager.USB_CHANNEL_ID) {
-                // We only compare seId because we assume we can only open 1 card from USB
-                return usbChannels.find { it.seId == seId }
+                return if (usbChannel != null && usbChannel!!.valid) {
+                    usbChannel
+                } else {
+                    usbChannel = null
+                    null
+                }
             }
 
             val existing =
-                channelCache.find { it.slotId == port.card.physicalSlotIndex && it.portId == port.portIndex && it.seId == seId }
+                channelCache.find { it.slotId == port.card.physicalSlotIndex && it.portId == port.portIndex }
             if (existing != null) {
                 if (existing.valid && port.logicalSlotIndex == existing.logicalSlotId) {
                     return existing
@@ -94,12 +96,12 @@ open class DefaultEuiccChannelManager(
                 return null
             }
 
-            val channels =
-                tryOpenChannelWithKnownAids { isdrAid, seId -> euiccChannelFactory.tryOpenEuiccChannel(port, isdrAid, seId) }
+            val channel =
+                tryOpenChannelFirstValidAid { euiccChannelFactory.tryOpenEuiccChannel(port, it) }
 
-            if (channels.isNotEmpty()) {
-                channelCache.addAll(channels)
-                return channels.find { it.seId == seId }
+            if (channel != null) {
+                channelCache.add(channel)
+                return channel
             } else {
                 Log.i(
                     TAG,
@@ -110,10 +112,10 @@ open class DefaultEuiccChannelManager(
         }
     }
 
-    protected suspend fun findEuiccChannelByLogicalSlot(logicalSlotId: Int, seId: Int = 0): EuiccChannel? =
+    protected suspend fun findEuiccChannelByLogicalSlot(logicalSlotId: Int): EuiccChannel? =
         withContext(Dispatchers.IO) {
             if (logicalSlotId == EuiccChannelManager.USB_CHANNEL_ID) {
-                return@withContext usbChannels.find { it.seId == seId }
+                return@withContext usbChannel
             }
 
             for (card in uiccCards) {
@@ -129,7 +131,7 @@ open class DefaultEuiccChannelManager(
 
     private suspend fun findAllEuiccChannelsByPhysicalSlot(physicalSlotId: Int): List<EuiccChannel>? {
         if (physicalSlotId == EuiccChannelManager.USB_CHANNEL_ID) {
-            return usbChannels.ifEmpty { null }
+            return usbChannel?.let { listOf(it) }
         }
 
         for (card in uiccCards) {
@@ -140,14 +142,14 @@ open class DefaultEuiccChannelManager(
         return null
     }
 
-    private suspend fun findEuiccChannelByPort(physicalSlotId: Int, portId: Int, seId: Int = 0): EuiccChannel? =
+    private suspend fun findEuiccChannelByPort(physicalSlotId: Int, portId: Int): EuiccChannel? =
         withContext(Dispatchers.IO) {
             if (physicalSlotId == EuiccChannelManager.USB_CHANNEL_ID) {
-                return@withContext usbChannels.find { it.seId == seId }
+                return@withContext usbChannel
             }
 
             uiccCards.find { it.physicalSlotIndex == physicalSlotId }?.let { card ->
-                card.ports.find { it.portIndex == portId }?.let { tryOpenEuiccChannel(it, seId) }
+                card.ports.find { it.portIndex == portId }?.let { tryOpenEuiccChannel(it) }
             }
         }
 
@@ -166,16 +168,15 @@ open class DefaultEuiccChannelManager(
                 return@withContext listOf(0)
             }
 
-            findAllEuiccChannelsByPhysicalSlot(physicalSlotId)?.map { it.portId }?.toSet()?.toList() ?: listOf()
+            findAllEuiccChannelsByPhysicalSlot(physicalSlotId)?.map { it.portId } ?: listOf()
         }
 
     override suspend fun <R> withEuiccChannel(
         physicalSlotId: Int,
         portId: Int,
-        seId: Int,
         fn: suspend (EuiccChannel) -> R
     ): R {
-        val channel = findEuiccChannelByPort(physicalSlotId, portId, seId)
+        val channel = findEuiccChannelByPort(physicalSlotId, portId)
             ?: throw EuiccChannelManager.EuiccChannelNotFoundException()
         val wrapper = EuiccChannelWrapper(channel)
         try {
@@ -189,10 +190,9 @@ open class DefaultEuiccChannelManager(
 
     override suspend fun <R> withEuiccChannel(
         logicalSlotId: Int,
-        seId: Int,
         fn: suspend (EuiccChannel) -> R
     ): R {
-        val channel = findEuiccChannelByLogicalSlot(logicalSlotId, seId)
+        val channel = findEuiccChannelByLogicalSlot(logicalSlotId)
             ?: throw EuiccChannelManager.EuiccChannelNotFoundException()
         val wrapper = EuiccChannelWrapper(channel)
         try {
@@ -206,8 +206,8 @@ open class DefaultEuiccChannelManager(
 
     override suspend fun waitForReconnect(physicalSlotId: Int, portId: Int, timeoutMillis: Long) {
         if (physicalSlotId == EuiccChannelManager.USB_CHANNEL_ID) {
-            usbChannels.forEach { it.close() }
-            usbChannels.clear()
+            usbChannel?.close()
+            usbChannel = null
         } else {
             // If there is already a valid channel, we close it proactively
             // Sometimes the current channel can linger on for a bit even after it should have become invalid
@@ -223,7 +223,7 @@ open class DefaultEuiccChannelManager(
                         // tryOpenUsbEuiccChannel() will always try to reopen the channel, even if
                         // a USB channel already exists
                         tryOpenUsbEuiccChannel()
-                        usbChannels.getOrNull(0)!!
+                        usbChannel!!
                     } else {
                         // tryOpenEuiccChannel() will automatically dispose of invalid channels
                         // and recreate when needed
@@ -280,13 +280,12 @@ open class DefaultEuiccChannelManager(
                 val ccidCtx = UsbCcidContext.createFromUsbDevice(context, device, iface) ?: return@forEach
 
                 try {
-                    val channels = tryOpenChannelWithKnownAids { isdrAid, seId ->
-                        euiccChannelFactory.tryOpenUsbEuiccChannel(ccidCtx, isdrAid, seId)
+                    val channel = tryOpenChannelFirstValidAid {
+                        euiccChannelFactory.tryOpenUsbEuiccChannel(ccidCtx, it)
                     }
-                    if (channels.isNotEmpty() && channels[0].valid) {
+                    if (channel != null && channel.lpa.valid) {
                         ccidCtx.allowDisconnect = true
-                        usbChannels.clear()
-                        usbChannels.addAll(channels)
+                        usbChannel = channel
                         return@withContext Pair(device, true)
                     }
                 } catch (e: Exception) {
@@ -310,8 +309,8 @@ open class DefaultEuiccChannelManager(
             channel.close()
         }
 
-        usbChannels.forEach { it.close() }
-        usbChannels.clear()
+        usbChannel?.close()
+        usbChannel = null
         channelCache.clear()
         euiccChannelFactory.cleanup()
     }

app-common/src/main/java/im/angry/openeuicc/core/EuiccChannel.kt

@@ -13,16 +13,6 @@ interface EuiccChannel {
     val logicalSlotId: Int
     val portId: Int
 
-    /**
-     * Some chips support multiple SEs on one chip. The seId here is intended
-     * to distinguish channels opened from these different SEs.
-     *
-     * Note that this ID is arbitrary and heavily depends on the order in which
-     * we attempt to open the ISD-R AIDs. As such, it shall not be treated with
-     * any significance other than as a transient ID.
-     */
-    val seId: Int
-
     val lpa: LocalProfileAssistant
 
     val valid: Boolean

app-common/src/main/java/im/angry/openeuicc/core/EuiccChannelFactory.kt

@@ -6,12 +6,11 @@ import im.angry.openeuicc.util.*
 // This class is here instead of inside DI because it contains a bit more logic than just
 // "dumb" dependency injection.
 interface EuiccChannelFactory {
-    suspend fun tryOpenEuiccChannel(port: UiccPortInfoCompat, isdrAid: ByteArray, seInt: Int): EuiccChannel?
+    suspend fun tryOpenEuiccChannel(port: UiccPortInfoCompat, isdrAid: ByteArray): EuiccChannel?
 
     fun tryOpenUsbEuiccChannel(
         ccidCtx: UsbCcidContext,
-        isdrAid: ByteArray,
-        seInt: Int
+        isdrAid: ByteArray
     ): EuiccChannel?
 
     /**

app-common/src/main/java/im/angry/openeuicc/core/EuiccChannelImpl.kt

@@ -14,7 +14,6 @@ class EuiccChannelImpl(
     override val intrinsicChannelName: String?,
     override val apduInterface: ApduInterface,
     override val isdrAid: ByteArray,
-    override val seId: Int,
     verboseLoggingFlow: Flow<Boolean>,
     ignoreTLSCertificateFlow: Flow<Boolean>
 ) : EuiccChannel {

app-common/src/main/java/im/angry/openeuicc/core/EuiccChannelManager.kt

@@ -81,7 +81,6 @@ interface EuiccChannelManager {
     suspend fun <R> withEuiccChannel(
         physicalSlotId: Int,
         portId: Int,
-        seId: Int = 0,
         fn: suspend (EuiccChannel) -> R
     ): R
 
@@ -90,7 +89,6 @@ interface EuiccChannelManager {
      */
     suspend fun <R> withEuiccChannel(
         logicalSlotId: Int,
-        seId: Int = 0,
         fn: suspend (EuiccChannel) -> R
     ): R
 

app-common/src/main/java/im/angry/openeuicc/core/EuiccChannelWrapper.kt

@@ -26,8 +26,6 @@ class EuiccChannelWrapper(orig: EuiccChannel) : EuiccChannel {
         get() = channel.logicalSlotId
     override val portId: Int
         get() = channel.portId
-    override val seId: Int
-        get() = channel.seId
     private val lpaDelegate = lazy {
         LocalProfileAssistantWrapper(channel.lpa)
     }

app-common/src/main/java/im/angry/openeuicc/ui/EuiccInfoActivity.kt

@@ -92,7 +92,7 @@ class EuiccInfoActivity : BaseEuiccAccessActivity(), OpenEuiccContextMarker {
 
         lifecycleScope.launch {
             (infoList.adapter!! as EuiccInfoAdapter).euiccInfoItems =
-                euiccChannelManager.withEuiccChannel(logicalSlotId, fn = ::buildEuiccInfoItems)
+                euiccChannelManager.withEuiccChannel(logicalSlotId, ::buildEuiccInfoItems)
 
             swipeRefresh.isRefreshing = false
         }

app/src/main/java/im/angry/openeuicc/core/PrivilegedEuiccChannelFactory.kt

@@ -16,14 +16,13 @@ class PrivilegedEuiccChannelFactory(context: Context) : DefaultEuiccChannelFacto
     @Suppress("NAME_SHADOWING")
     override suspend fun tryOpenEuiccChannel(
         port: UiccPortInfoCompat,
-        isdrAid: ByteArray,
-        seId: Int,
+        isdrAid: ByteArray
     ): EuiccChannel? {
         val port = port as RealUiccPortInfoCompat
         if (port.card.isRemovable) {
             // Attempt unprivileged (OMAPI) before TelephonyManager
             // but still try TelephonyManager in case OMAPI is broken
-            super.tryOpenEuiccChannel(port, isdrAid, seId)?.let { return it }
+            super.tryOpenEuiccChannel(port, isdrAid)?.let { return it }
         }
 
         if (port.card.isEuicc || preferenceRepository.removableTelephonyManagerFlow.first()) {
@@ -42,7 +41,6 @@ class PrivilegedEuiccChannelFactory(context: Context) : DefaultEuiccChannelFacto
                         context.preferenceRepository.verboseLoggingFlow
                     ),
                     isdrAid,
-                    seId,
                     context.preferenceRepository.verboseLoggingFlow,
                     context.preferenceRepository.ignoreTLSCertificateFlow,
                 )
@@ -55,6 +53,6 @@ class PrivilegedEuiccChannelFactory(context: Context) : DefaultEuiccChannelFacto
             }
         }
 
-        return super.tryOpenEuiccChannel(port, isdrAid, seId)
+        return super.tryOpenEuiccChannel(port, isdrAid)
     }
 }