fix: handle undefined values properly

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.25.0 FATAL_ERROR)
 
 set(PROJECT AmneziaVPN)
-set(AMNEZIAVPN_VERSION 4.8.19.0)
+set(AMNEZIAVPN_VERSION 4.8.18.0)
 
 project(${PROJECT} VERSION ${AMNEZIAVPN_VERSION}
         DESCRIPTION "AmneziaVPN"
@@ -12,7 +12,7 @@ string(TIMESTAMP CURRENT_DATE "%Y-%m-%d")
 set(RELEASE_DATE "${CURRENT_DATE}")
 
 set(APP_MAJOR_VERSION ${CMAKE_PROJECT_VERSION_MAJOR}.${CMAKE_PROJECT_VERSION_MINOR}.${CMAKE_PROJECT_VERSION_PATCH})
-set(APP_ANDROID_VERSION_CODE 2129)
+set(APP_ANDROID_VERSION_CODE 2128)
 
 if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
     set(MZ_PLATFORM_NAME "linux")

client/daemon/daemon.cpp

@@ -402,13 +402,13 @@ bool Daemon::parseConfig(const QJsonObject& obj, InterfaceConfig& config) {
   if (const auto s1 = obj.value("S1"); !s1.isUndefined()) {
     config.m_initPacketJunkSize = s1.toString();
   }
-  if (const auto s2 = obj.value("S2"); !s2.isUndefined()) {
+  if (const auto s2 = obj.value("s2"); !s2.isUndefined()) {
     config.m_responsePacketJunkSize = s2.toString();
   }
   if (const auto s3 = obj.value("S3"); !s3.isUndefined()) {
     config.m_cookieReplyPacketJunkSize = s3.toString();
   }
-  if (const auto s4 = obj.value("S4"); !s4.isUndefined()) {
+  if (const auto s4 = obj.value("s4"); !s4.isUndefined()) {
     config.m_transportPacketJunkSize = s4.toString();
   }