Merge pull request #131 from Cyenoch/master

Addressed an exception that was thrown because InetAddress.getLocalHost().hostAddress might get an ipv6 address

mirai-core/src/androidMain/kotlin/net/mamoe/mirai/utils/platformAndroid.kt

@@ -18,7 +18,7 @@ import kotlinx.io.pool.useInstance
 import net.mamoe.mirai.utils.io.ByteArrayPool
 import java.io.ByteArrayOutputStream
 import java.io.InputStream
-import java.net.InetAddress
+import java.net.Inet4Address
 import java.security.MessageDigest
 import java.util.zip.Deflater
 import java.util.zip.Inflater
@@ -81,7 +81,7 @@ actual object MiraiPlatformUtils {
      * Localhost 解析
      */
     actual fun localIpAddress(): String = runCatching {
-        InetAddress.getLocalHost().hostAddress
+        Inet4Address.getLocalHost().hostAddress
     }.getOrElse { "192.168.1.123" }
 
     fun md5(stream: InputStream): ByteArray {

mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/utils/PlatformUtilsJvm.kt

@@ -19,7 +19,7 @@ import net.mamoe.mirai.utils.io.ByteArrayPool
 import java.io.ByteArrayOutputStream
 import java.io.InputStream
 import java.io.OutputStream
-import java.net.InetAddress
+import java.net.Inet4Address
 import java.security.MessageDigest
 import java.util.zip.Deflater
 import java.util.zip.Inflater
@@ -82,7 +82,7 @@ actual object MiraiPlatformUtils {
      * Localhost 解析
      */
     actual fun localIpAddress(): String = runCatching {
-        InetAddress.getLocalHost().hostAddress
+        Inet4Address.getLocalHost().hostAddress
     }.getOrElse { "192.168.1.123" }
 
     fun md5(stream: InputStream): ByteArray {