Added Telephony Provider account configuration item

Added support for Contact tel URIs
Show account's STUN configuration items only if needed
Avoid some lint warnings in baresip.c

app/src/main/cpp/baresip.c

@@ -362,8 +362,8 @@ static struct mqueue *mq;
 static void mqueue_handler(int id, void *data, void *arg)
 {
     if (id == ID_UA_STOP_ALL) {
-        LOGD("calling ua_stop_all with force %u\n", (unsigned)data);
+        LOGD("calling ua_stop_all with force %u\n", (unsigned)(uintptr_t)data);
-        ua_stop_all((bool)data);
+        ua_stop_all((bool)(uintptr_t)data);
     }
 }
 

app/src/main/kotlin/com/tutpro/baresip/Account.kt

@@ -3,6 +3,8 @@ package com.tutpro.baresip
 import android.content.Context
 import java.util.*
 import kotlin.collections.ArrayList
+import java.net.URLEncoder
+import java.net.URLDecoder
 
 class Account(val accp: String) {
 
@@ -28,6 +30,7 @@ class Account(val accp: String) {
     var missedCalls = false
     var unreadMessages = false
     var callHistory = true
+    var telProvider = Utils.aorDomain(aor)
     var resumeUri = ""
 
     init {
@@ -56,6 +59,10 @@ class Account(val accp: String) {
 
         val extra = Api.account_extra(accp)
         callHistory = Utils.paramValue(extra,"call_history") == ""
+        telProvider = if (Utils.paramExists(extra, "tel_provider"))
+            URLDecoder.decode(Utils.paramValue(extra,"tel_provider"), "UTF-8")
+        else
+            Utils.aorDomain(aor)
 
     }
 
@@ -119,6 +126,8 @@ class Account(val accp: String) {
         if (!callHistory)
             extra += ";call_history=no"
 
+        extra += ";tel_provider=${URLEncoder.encode(telProvider, "UTF-8")}"
+
         if (extra != "")
             res += ";extra=\"" + extra.substringAfter(";") + "\""
 

app/src/main/kotlin/com/tutpro/baresip/AccountActivity.kt

@@ -2,10 +2,13 @@ package com.tutpro.baresip
 
 import android.app.Activity
 import android.content.Intent
+import android.opengl.Visibility
 import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
 import android.widget.*
 import androidx.appcompat.app.AppCompatActivity
 import com.tutpro.baresip.databinding.ActivityAccountBinding
@@ -33,6 +36,7 @@ class AccountActivity : AppCompatActivity() {
     private lateinit var outbound1: EditText
     private lateinit var outbound2: EditText
     private lateinit var mediaNat: String
+    private lateinit var stun: LinearLayout
     private lateinit var stunServer: EditText
     private lateinit var stunUser: EditText
     private lateinit var stunPass: EditText
@@ -45,6 +49,7 @@ class AccountActivity : AppCompatActivity() {
     private var answerMode = Api.ANSWERMODE_MANUAL
     private lateinit var answerModeSpinner: Spinner
     private lateinit var vmUri: EditText
+    private lateinit var telProvider: EditText
     private lateinit var defaultCheck: CheckBox
 
     private val mediaEncKeys = arrayListOf("zrtp", "dtls_srtp", "srtp-mandf", "srtp-mand", "srtp", "")
@@ -73,6 +78,7 @@ class AccountActivity : AppCompatActivity() {
         outbound2 = binding.Outbound2
         regCheck = binding.Register
         mediaNatSpinner = binding.mediaNatSpinner
+        stun = binding.Stun
         stunServer = binding.StunServer
         stunUser = binding.StunUser
         stunPass = binding.StunPass
@@ -80,6 +86,7 @@ class AccountActivity : AppCompatActivity() {
         dtmfModeSpinner = binding.dtmfModeSpinner
         answerModeSpinner = binding.answerModeSpinner
         vmUri = binding.voicemailUri
+        telProvider = binding.telephonyProvider
         defaultCheck = binding.Default
 
         aor = intent.getStringExtra("aor")!!
@@ -230,27 +237,21 @@ class AccountActivity : AppCompatActivity() {
                     stunServer.setText(resources.getString(R.string.stun_server_default))
                 else if ((mediaNat == "ice") && (stunServer.text.toString() == ""))
                     stunServer.setText(resources.getString(R.string.stun_server_default))
-                else if (mediaNat == "") {
+                if (mediaNat == "") {
+                    stun.visibility = GONE
                     stunServer.setText("")
                     stunUser.setText("")
                     stunPass.setText("")
-                }
+                } else
-                stunServer.isEnabled = mediaNat != ""
+                    stun.visibility = VISIBLE
-                stunUser.isEnabled = mediaNat != ""
-                stunPass.isEnabled = mediaNat != ""
             }
             override fun onNothingSelected(parent: AdapterView<*>) {
             }
         }
 
         stunServer.setText(acc.stunServer)
-        stunServer.isEnabled = mediaNat != ""
-
         stunUser.setText(acc.stunUser)
-        stunUser.isEnabled = mediaNat != ""
-
         stunPass.setText(acc.stunPass)
-        stunPass.isEnabled = mediaNat != ""
 
         mediaEnc = acc.mediaEnc
         keyIx = mediaEncKeys.indexOf(mediaEnc)
@@ -313,6 +314,8 @@ class AccountActivity : AppCompatActivity() {
             }
         }
 
+        telProvider.setText(acc.telProvider)
+
         vmUri.setText(acc.vmUri)
 
         defaultCheck.isChecked = uaIndex == 0
@@ -563,9 +566,9 @@ class AccountActivity : AppCompatActivity() {
                     if (tVmUri != "") {
                         if (!tVmUri.startsWith("sip:")) tVmUri = "sip:$tVmUri"
                         if (!tVmUri.contains("@")) tVmUri = "$tVmUri@${acc.host()}"
-                        if (!Utils.checkSipUri(tVmUri)) {
+                        if (!Utils.checkUri(tVmUri)) {
                             Utils.alertView(this, getString(R.string.notice),
-                                    String.format(getString(R.string.invalid_voicemail_uri), tVmUri))
+                                    String.format(getString(R.string.invalid_sip_or_tel_uri), tVmUri))
                             return false
                         }
                         Api.account_set_mwi(acc.accp, "yes")
@@ -576,6 +579,17 @@ class AccountActivity : AppCompatActivity() {
                     save = true
                 }
 
+                val hostPart = telProvider.text.toString().trim()
+                if (hostPart != acc.telProvider) {
+                    if (hostPart != "" && !Utils.checkHostPortParams(hostPart)) {
+                        Utils.alertView(this, getString(R.string.notice),
+                                String.format(getString(R.string.invalid_sip_uri_hostpart), hostPart))
+                        return false
+                    }
+                    acc.telProvider = hostPart
+                    save = true
+                }
+
                 if (defaultCheck.isChecked && (uaIndex > 0)) {
                     val uasTmp = BaresipService.uas[0]
                     val statusTmp = BaresipService.status[0]
@@ -708,6 +722,12 @@ class AccountActivity : AppCompatActivity() {
                 getString(R.string.voicemain_uri_help)
             )
         }
+        binding.TelephonyProviderTitle.setOnClickListener {
+            Utils.alertView(
+                    this, getString(R.string.telephony_provider),
+                    getString(R.string.telephony_provider_help)
+            )
+        }
         binding.DefaultTitle.setOnClickListener {
             Utils.alertView(
                 this, getString(R.string.default_account),

app/src/main/kotlin/com/tutpro/baresip/ChatsActivity.kt

@@ -123,17 +123,14 @@ class ChatsActivity: AppCompatActivity() {
         plusButton.setOnClickListener {
             val uriText = peerUri.text.toString().trim()
             if (uriText.isNotEmpty()) {
-                var uri = ContactsActivity.findContactURI(uriText)
+                val contactUri = ContactsActivity.findContactUri(uriText)
-                if (!uri.startsWith("sip:")) {
+                val uri = if (contactUri == null)
-                    uri = "sip:$uri"
+                    Utils.uriComplete(uriText, Utils.aorDomain(aor))
-                    if (!uri.contains("@")) {
+                else
-                        val host = aor.substring(aor.indexOf("@") + 1)
+                    uriText
-                        uri = "$uri@$host"
+                if (!Utils.checkUri(uri)) {
-                    }
-                }
-                if (!Utils.checkSipUri(uri)) {
                     Utils.alertView(this, getString(R.string.notice),
-                            getString(R.string.invalid_chat_peer_uri))
+                            String.format(getString(R.string.invalid_sip_or_tel_uri), uri))
                 } else {
                     peerUri.text.clear()
                     peerUri.isCursorVisible = false

app/src/main/kotlin/com/tutpro/baresip/ContactActivity.kt

@@ -33,6 +33,7 @@ import com.tutpro.baresip.databinding.ActivityContactBinding
 import java.io.ByteArrayOutputStream
 import java.io.File
 
+
 class ContactActivity : AppCompatActivity() {
 
     private lateinit var binding: ActivityContactBinding
@@ -83,12 +84,10 @@ class ContactActivity : AppCompatActivity() {
             nameView.hint = getString(R.string.contact_name)
             nameView.setSelection(nameView.text.length)
             val uri = intent.getStringExtra("uri")!!
-            if (uri == "") {
+            if (uri == "")
                 uriView.setText("")
-                uriView.hint = getString(R.string.sip_uri)
+            else
-            } else {
                 uriView.setText(uri)
-            }
             uOrI = uri
             androidCheck.isChecked = false
         } else {
@@ -183,6 +182,9 @@ class ContactActivity : AppCompatActivity() {
                     requestPermissions(permissions, CONTACT_PERMISSION_REQUEST_CODE)
         }
 
+        Log.d(TAG, "********** Android sip contacts ${logAndroidContacts(this, "sip")}")
+        Log.d(TAG, "********** Android tel contacts ${logAndroidContacts(this, "tel")}")
+
         Utils.addActivity("contact,$newContact,$uOrI")
 
     }
@@ -255,7 +257,7 @@ class ContactActivity : AppCompatActivity() {
             R.id.checkIcon -> {
 
                 var newName = nameView.text.toString().trim()
-                var newUri = uriView.text.toString().trim()
+                var newUri = uriView.text.toString().filterNot{setOf('-', ' ').contains(it)}
 
                 if (newName == "") newName = newUri
 
@@ -275,15 +277,14 @@ class ContactActivity : AppCompatActivity() {
                     return false
                 }
 
-                if (!newUri.startsWith("sip:")) {
+                if (!newUri.startsWith("sip:") && !newUri.startsWith("tel:"))
-                    newUri = if (newUri.contains("@") || (BaresipService.uas.size != 1))
+                    newUri = if (Utils.isTelNumber(newUri))
-                        "sip:$newUri"
+                        "tel:$newUri"
                     else
-                        "sip:$newUri@${Utils.aorDomain(BaresipService.uas[0].account.aor)}"
+                        "sip:$newUri"
-                }
+                if (!Utils.checkUri(newUri)) {
-                if (!Utils.checkSipUri(newUri)) {
                     Utils.alertView(this, getString(R.string.notice),
-                            String.format(getString(R.string.invalid_contact_uri), newUri))
+                            String.format(getString(R.string.invalid_sip_or_tel_uri), newUri))
                     return false
                 }
 
@@ -555,13 +556,16 @@ class ContactActivity : AppCompatActivity() {
         }
 
         @Suppress("UNUSED")
-        fun logAndroidSipContacts(ctx: Context): HashMap<Long, MutableList<String>> {
+        fun logAndroidContacts(ctx: Context, type: String): HashMap<Long, MutableList<String>> {
+            val mimeType = if (type == "sip")
+                CommonDataKinds.SipAddress.CONTENT_ITEM_TYPE
+            else
+                CommonDataKinds.Phone.CONTENT_ITEM_TYPE
             val contacts = HashMap<Long, MutableList<String>>()
             val projection = arrayOf(ContactsContract.Data.CONTACT_ID, ContactsContract.Data.DISPLAY_NAME,
                     ContactsContract.Data.MIMETYPE, ContactsContract.Data.DATA1,
                     ContactsContract.Data.PHOTO_THUMBNAIL_URI)
-            val selection = ContactsContract.Data.MIMETYPE + "='" +
+            val selection = ContactsContract.Data.MIMETYPE + "='" + mimeType + "'"
-                    CommonDataKinds.SipAddress.CONTENT_ITEM_TYPE + "'"
             val cur: Cursor? = ctx.contentResolver.query(ContactsContract.Data.CONTENT_URI, projection,
                     selection, null, null)
             while (cur != null && cur.moveToNext()) {
@@ -574,6 +578,7 @@ class ContactActivity : AppCompatActivity() {
                 when (mime) {
                     CommonDataKinds.SipAddress.CONTENT_ITEM_TYPE -> kind = "sip"
                     CommonDataKinds.Photo.CONTENT_ITEM_TYPE -> kind = "thumb"
+                    CommonDataKinds.Phone.CONTENT_ITEM_TYPE -> kind = "tel"
                 }
                 Log.d(TAG, "got $id, $name, $kind - $data")
                 var info: MutableList<String>

app/src/main/kotlin/com/tutpro/baresip/ContactListAdapter.kt

@@ -11,10 +11,7 @@ import androidx.appcompat.app.AlertDialog
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import android.widget.ArrayAdapter
+import android.widget.*
-import android.widget.ImageButton
-import android.widget.ImageView
-import android.widget.TextView
 import androidx.core.content.ContextCompat.startActivity
 
 import java.io.File
@@ -79,13 +76,27 @@ class ContactListAdapter(private val ctx: Context, private val rows: ArrayList<C
                                 i.putExtra("action", "call")
                             else
                                 i.putExtra("action", "message")
-                            val ua = UserAgent.ofAor(aor)
+                            var ua = UserAgent.ofAor(aor)
                             if (ua == null) {
                                 Log.w(TAG, "onClickListener did not find AoR $aor")
+                            } else {
+                                if (Utils.isTelUri(contact.uri) && ua.account.telProvider == "") {
+                                    var newUa: UserAgent? = null
+                                    for (a in Account.accounts())
+                                        if (a.telProvider != "") {
+                                            newUa = UserAgent.ofAor(a.aor)
+                                            break
+                                        }
+                                    ua = newUa
+                                }
+                            }
+                            if (ua == null) {
+                                Toast.makeText(ctx, ctx.getString(R.string.no_telephony_providers),
+                                        Toast.LENGTH_LONG).show()
                             } else {
                                 BaresipService.activities.clear()
                                 i.putExtra("uap", ua.uap)
-                                i.putExtra("peer", Contact.contacts()[position].uri)
+                                i.putExtra("peer", contact.uri)
                                 (ctx as Activity).startActivity(i)
                             }
                         }

app/src/main/kotlin/com/tutpro/baresip/ContactsActivity.kt

@@ -89,19 +89,18 @@ class ContactsActivity : AppCompatActivity() {
 
     companion object {
 
-        fun findContactURI(name: String): String {
+        fun findContactUri(name: String): String? {
             for (c in Contact.contacts())
-                if (c.name == name)
+                if (c.name.equals(name, ignoreCase = true))
                     return c.uri.removePrefix("<")
                             .replaceAfter(">", "")
                             .replace(">", "")
-            return name
+            return null
         }
 
         fun findContact(uri: String): Contact? {
             for (c in Contact.contacts())
-                if ((Utils.uriUserPart(c.uri) == Utils.uriUserPart(uri)) &&
+                if (Utils.uriMatch(c.uri, uri))
-                        (Utils.uriHostPart(c.uri) == Utils.uriHostPart(uri)))
                     return c
             return null
         }
@@ -112,17 +111,14 @@ class ContactsActivity : AppCompatActivity() {
             return false
         }
 
+        // Return contact name of uri or uri itself if contact with uri is not found
         fun contactName(uri: String): String {
-            val uriUser = Utils.uriUserPart(uri)
+            val userPart = Utils.uriUserPart(uri)
-            val uriHost = Utils.uriHostPart(uri)
+            return if (Utils.isTelNumber(userPart))
-            for (c in Contact.contacts()) {
+                findContact("tel:$userPart")?.name ?: uri
-                val contactUser = Utils.uriUserPart(c.uri)
+            else
-                if ((contactUser == uriUser) &&
+                findContact(uri)?.name ?: uri
-                        (Utils.isE164Number(contactUser) ||
-                                (Utils.uriHostPart(c.uri) == uriHost)))
-                    return c.name
-            }
-            return uri
         }
+
     }
 }

app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt

@@ -774,11 +774,19 @@ class MainActivity : AppCompatActivity() {
                     ua.account.resumeUri = uriStr
                 }
                 "tel" -> {
-                    val acc = BaresipService.uas[0].account
+                    var account: Account? = null
-                    spinToAor(acc.aor)
+                    for (a in Account.accounts())
+                        if (a.telProvider != "") {
+                            account = a
+                            break
+                        }
+                    if (account == null) {
+                        Log.w(TAG, "No telephony providers for '$uriStr'")
+                        return
+                    }
+                    spinToAor(account.aor)
                     resumeAction = "call"
-                    acc.resumeUri = uriStr.replace("tel", "sip") + "@" +
+                    account.resumeUri = uriStr
-                            Utils.uriHostPart(acc.aor)
                 }
                 else -> {
                     Log.w(TAG, "Unsupported URI scheme ${uri.scheme}")
@@ -1369,16 +1377,24 @@ class MainActivity : AppCompatActivity() {
             setPositiveButton(R.string.transfer) { dialog, _ ->
                 imm.hideSoftInputFromWindow(transferUri.windowToken, 0)
                 dialog.dismiss()
-                val uriText = transferUri.text.toString().trim()
+                var uriText = transferUri.text.toString().trim()
                 if (uriText.isNotEmpty()) {
-                    val uri = Utils.uriComplete(
+                    uriText = ContactsActivity.findContactUri(uriText) ?: uriText
-                            ContactsActivity.findContactURI(uriText)
+                    if (Utils.isTelNumber(uriText))
-                                    .filterNot { it.isWhitespace() },
+                        uriText = "tel:$uriText"
-                            Utils.aorDomain(ua.account.aor)
+                    val uri = if (Utils.isTelUri(uriText)) {
-                    )
+                        if (ua.account.telProvider == "") {
-                    if (!Utils.checkSipUri(uri)) {
                             Utils.alertView(this@MainActivity, getString(R.string.notice),
-                                String.format(getString(R.string.invalid_sip_uri), uri))
+                                    String.format(getString(R.string.no_telephony_provider)))
+                            return@setPositiveButton
+                        }
+                        Utils.telToSip(uriText, ua.account)
+                    } else {
+                        Utils.uriComplete(uriText, Utils.aorDomain(ua.account.aor))
+                    }
+                    if (!Utils.checkUri(uri)) {
+                        Utils.alertView(this@MainActivity, getString(R.string.notice),
+                                String.format(getString(R.string.invalid_sip_or_tel_uri), uri))
                     } else {
                         if (Call.uaCalls(ua, "").size > 0) {
                             Call.uaCalls(ua, "")[0].transfer(uri)
@@ -1655,17 +1671,24 @@ class MainActivity : AppCompatActivity() {
         val ua = UserAgent.uas()[aorSpinner.selectedItemPosition]
         val aor = ua.account.aor
         if (Call.calls().isEmpty()) {
-            val uriText = callUri.text.toString().trim()
+            var uriText = callUri.text.toString().trim()
             if (uriText.isNotEmpty()) {
-                val uri = Utils.uriComplete(
+                uriText = ContactsActivity.findContactUri(uriText) ?: uriText
-                    ContactsActivity.findContactURI(uriText)
+                if (Utils.isTelNumber(uriText))
-                        .filterNot { it.isWhitespace() },
+                    uriText = "tel:$uriText"
-                    Utils.aorDomain(aor)
+                val uri = if (Utils.isTelUri(uriText)) {
-                )
+                    if (ua.account.telProvider == "") {
-                if (!Utils.checkSipUri(uri)) {
+                        Utils.alertView(this, getString(R.string.notice),
-                    Utils.alertView(
+                                String.format(getString(R.string.no_telephony_provider)))
-                        this, getString(R.string.notice),
+                        return
-                        String.format(getString(R.string.invalid_sip_uri), uri)
+                    }
+                    Utils.telToSip(uriText, ua.account)
+                } else {
+                    Utils.uriComplete(uriText, Utils.aorDomain(aor))
+                }
+                if (!Utils.checkUri(uri)) {
+                    Utils.alertView(this, getString(R.string.notice),
+                            String.format(getString(R.string.invalid_sip_or_tel_uri), uri)
                     )
                 } else {
                     callUri.isFocusable = false

app/src/main/kotlin/com/tutpro/baresip/Utils.kt

@@ -105,6 +105,15 @@ object Utils {
             ""
     }
 
+    fun uriMatch(firstUri: String, secondUri: String): Boolean {
+        if (firstUri.startsWith("tel:"))
+            return firstUri == secondUri
+        if (firstUri.startsWith("sip:"))
+            return uriUserPart(firstUri) == uriUserPart(secondUri) &&
+                    uriHostPart(firstUri) == uriHostPart(secondUri)
+        return false
+    }
+
     private fun uriParams(uri: String): List<String> {
         val params = uri.split(";")
         return if (params.size == 1) listOf() else params.subList(1, params.size)
@@ -121,7 +130,7 @@ object Utils {
         return if (u.contains("@")) {
             val user = uriUserPart(u)
             val host = uriHostPart(u)
-            if (isE164Number(user) || host == domain)
+            if (isTelNumber(user) || host == domain)
                 user
             else
                 "$user@$host"
@@ -164,10 +173,6 @@ object Utils {
                 checkTransport(uri.substringAfter("?"), setOf("udp", "tcp")))
     }
 
-    fun isE164Number(no: String): Boolean {
-        return Regex("^[+][1-9][0-9]{0,14}\$").matches(no)
-    }
-
     fun checkIpV4(ip: String): Boolean {
         return Regex("^(([0-1]?[0-9]{1,2}\\.)|(2[0-4][0-9]\\.)|(25[0-5]\\.)){3}(([0-1]?[0-9]{1,2})|(2[0-4][0-9])|(25[0-5]))$").matches(ip)
     }
@@ -256,6 +261,12 @@ object Utils {
         return ""
     }
 
+    fun paramExists(params: String, name: String): Boolean {
+        for (param in params.split(";"))
+            if (param.substringBefore("=") == name) return true
+        return false
+    }
+
     fun checkHostPortParams(hpp: String) : Boolean {
         val restParams = hpp.split(";", limit = 2)
         return if (restParams.size == 1)
@@ -264,16 +275,40 @@ object Utils {
             checkHostPort(restParams[0]) && checkParams(restParams[1])
     }
 
-    fun checkSipUri(uri: String): Boolean {
+    private fun checkSipUri(uri: String): Boolean {
-        if (!uri.startsWith("sip:")) return false
+        return if (uri.startsWith("sip:")) {
             val userRest = uri.substring(4).split("@")
-        return when (userRest.size) {
+            when (userRest.size) {
                 1 ->
                     checkHostPortParams(userRest[0])
                 2 ->
                     checkUriUser(userRest[0]) && checkHostPortParams(userRest[1])
                 else -> false
             }
+        } else {
+            false
+        }
+    }
+
+    fun isTelNumber(no: String): Boolean {
+        return Regex("^[+][1-9][0-9- ]{0,14}\$").matches(no)
+    }
+
+    fun isTelUri(uri: String): Boolean {
+        return uri.startsWith("tel:") && isTelNumber(uri.substring(4))
+    }
+
+    fun checkUri(uri: String): Boolean {
+        return checkSipUri(uri) || isTelUri(uri)
+    }
+
+    fun telToSip(telUri: String, account: Account): String {
+        val hostPart = if (account.telProvider != "")
+            account.telProvider
+        else
+            aorDomain(account.aor)
+        return "sip:" + telUri.substring(4).filterNot{setOf('-', ' ').contains(it)} +
+                "@" + hostPart + ";user=phone"
     }
 
     fun checkName(name: String): Boolean {

app/src/main/res/layout/activity_account.xml

@@ -178,6 +178,12 @@
             android:paddingTop="8dp" >
         </Spinner>
 
+        <LinearLayout
+            android:id="@+id/Stun"
+            android:layout_width="fill_parent"
+            android:orientation="vertical"
+            android:layout_height="wrap_content" >
+
             <TextView
                 android:id="@+id/StunServerTitle"
                 android:layout_width="wrap_content"
@@ -242,6 +248,8 @@
                 </androidx.appcompat.widget.AppCompatEditText>
             </com.google.android.material.textfield.TextInputLayout>
 
+        </LinearLayout>
+
         <TextView
             android:id="@+id/DtmfModeTitle"
             android:layout_width="wrap_content"
@@ -293,6 +301,25 @@
             android:layout_width="fill_parent">
         </EditText>
 
+        <TextView
+            android:id="@+id/TelephonyProviderTitle"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:paddingTop="10dp"
+            android:textSize="18sp"
+            android:text="@string/telephony_provider" >
+        </TextView>
+
+        <EditText
+            android:id="@+id/telephonyProvider"
+            android:layout_height="wrap_content"
+            android:hint="@string/telephony_provider_hint"
+            android:textSize="18sp"
+            android:inputType="textUri"
+            android:importantForAutofill="no"
+            android:layout_width="fill_parent">
+        </EditText>
+
         <RelativeLayout
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"

app/src/main/res/layout/activity_contact.xml

@@ -63,19 +63,19 @@
     </EditText>
 
     <TextView
-        android:id="@+id/SipUriTitle"
+        android:id="@+id/SipOrTelUriTitle"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:textSize="18sp"
         android:paddingTop="10dp"
-        android:text="@string/sip_uri" >
+        android:text="@string/sip_or_tel_uri" >
     </TextView>
 
     <EditText
         android:id="@+id/Uri"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
-        android:hint="@string/sip_uri"
+        android:hint="@string/user_domain_or_number"
         android:inputType="textEmailAddress"
         android:textSize="18sp"
         android:importantForAutofill="no"

app/src/main/res/values/strings.xml

@@ -182,6 +182,13 @@
         messages (Message Waiting Indications) are not subscribed to.
     </string>
     <string name="invalid_voicemail_uri">Invalid Voicemail URI \'%1$s\'</string>
+    <string name="telephony_provider">Telephony Provider</string>
+    <string name="telephony_provider_help">SIP URI host part used in calls to telephone numbers.
+        Factory default is account\'s domain. If not given, this account cannot be used to call
+        telephone numbers.
+    </string>
+    <string name="telephony_provider_hint">SIP URI host part</string>
+    <string name="invalid_sip_uri_hostpart">Invalid SIP URI host part \'%1$s\'</string>
     <string name="default_account">Default Account</string>
     <string name="default_account_help">If checked, this account is selected when baresip is started.
     </string>
@@ -247,7 +254,7 @@
     <string name="today">Today</string>
     <string name="you">You</string>
     <string name="new_chat_peer">New Chat Peer</string>
-    <string name="invalid_chat_peer_uri">Invalid SIP URI</string>
+    <string name="invalid_chat_peer_uri">Invalid chat peer URI</string>
     <string name="long_chat_question">Do you want to delete chat with peer \'%1$s\' or
         add peer to contacts?</string>
     <string name="short_chat_question">Do you want to delete chat with \'%1$s\'?</string>
@@ -341,6 +348,8 @@
     <string name="contact">Contact</string>
     <string name="new_contact">New Contact</string>
     <string name="contact_name">Name</string>
+    <string name="sip_or_tel_uri">SIP or tel URI</string>
+    <string name="user_domain_or_number">user@domain or telephone number</string>
     <string name="invalid_contact">Invalid contact name \'%1$s\'</string>
     <string name="contact_already_exists">Contact \'%1$s\' already exists.</string>
     <string name="invalid_contact_uri">Invalid SIP URI</string>
@@ -353,6 +362,7 @@
     <string name="send_message">Send Message</string>
     <string name="contact_delete_question">Do you want to delete contact \'%1$s\'?</string>
     <string name="contacts_exceeded">Your maximum number of contacts %1$d has been exceeded.</string>
+    <string name="no_telephony_providers">Telephony provider has not been configured for any account.</string>
     <!-- Generic -->
     <string name="alert">Alert</string>
     <string name="info">Info</string>
@@ -376,6 +386,7 @@
     <string name="confirmation">Confirmation</string>
     <string name="dots" translatable="false">…</string>
     <string name="bullet_item" translatable="false">\u2022 %1$s</string>
+    <string name="invalid_sip_or_tel_uri">Invalid SIP or tel URI \'%1$s\'</string>
     <!-- Main Activity -->
     <string name="backup">Backup</string>
     <string name="restore">Restore</string>
@@ -386,6 +397,7 @@
     <string name="incoming_call_from_dots">Call from …</string>
     <string name="transferring_call_to_dots">Transferring call to …</string>
     <string name="invalid_sip_uri">Invalid SIP URI \'%1$s\'</string>
+    <string name="no_telephony_provider">Telephony provider has not been configured for this acccount.</string>
     <string name="callee">Callee</string>
     <string name="hangup">Hangup</string>
     <string name="video_call">Video call</string>