- By default, obtain DNS server addresses dynamically from the system.

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

@@ -2,6 +2,7 @@ package com.tutpro.baresip
 
 import android.content.Context
 import java.io.File
+import java.net.InetAddress
 
 object Config {
 
@@ -9,7 +10,7 @@ object Config {
     private val file = File(path)
     private var config = Utils.getFileContents(file)
 
-    fun initialize() {
+    fun initialize(dnsServers: List<InetAddress>) {
         var write = false
         if (!config.contains("zrtp_hash")) {
             config = "${config}zrtp_hash yes\n"
@@ -52,6 +53,17 @@ object Config {
         } else {
             BaresipService.callVolume = variable("call_volume")[0].toInt()
         }
+        if (!config.contains("dyn_dns")) {
+            config = "${config}dyn_dns no\n"
+            write = true
+        } else {
+            if (config.contains(Regex("dyn_dns[ ]+yes"))) {
+                for (dnsServer in dnsServers)
+                    config = "${config}dns_server ${dnsServer.hostAddress}:53\n"
+                BaresipService.dynDns = true
+                write = true
+            }
+        }
         if (write) {
             Log.e("Baresip", "Writing '$config'")
             Utils.putFileContents(file, config)
@@ -59,8 +71,8 @@ object Config {
     }
 
     fun variable(name: String): ArrayList<String> {
-        val lines = config.split("\n")
         val result = ArrayList<String>()
+        val lines = config.split("\n")
         for (line in lines) {
             if (line.startsWith(name))
                 result.add((line.substring(name.length).trim()).split("# \t")[0])
@@ -69,7 +81,7 @@ object Config {
     }
 
     fun add(variable: String, value: String) {
-        config += "\n$variable $value\n"
+        config += "$variable $value\n"
     }
 
     fun remove(variable: String) {
@@ -87,8 +99,29 @@ object Config {
     }
 
     fun save() {
+        var result = ""
+        for (line in config.split("\n"))
+            if (line.length > 0)
+                result = result + line + '\n'
+        config = result
         Utils.putFileContents(file, config)
-        Log.d("Baresip", "New config '$config'")
+        Log.d("Baresip", "New config '$result'")
         // Api.reload_config()
     }
-}
+
+    fun updateDnsServers(dnsServers: List<InetAddress>): Int {
+        var servers = ""
+        for (dnsServer in dnsServers) {
+            var address = dnsServer.hostAddress
+            if (Utils.checkIpV4(address))
+                address = "${address}:53"
+            else
+                address = "[${address}]:53"
+            if (servers == "")
+                servers = address
+            else
+                servers = "${servers},${address}"
+        }
+        return Api.dnsc_srv_set(servers)
+    }
+}