Fixed a crash related to the whisper system and some minor updates

server/src/client/shared/WhisperHandler.cpp

@@ -18,6 +18,8 @@ WhisperHandler::~WhisperHandler() {
 }
 
 bool WhisperHandler::validate_whisper_packet(const protocol::ClientPacketParser &packet, bool& match_last_header, void *&payload_ptr, size_t &payload_length) {
+    std::lock_guard process_lock{this->whisper_head_mutex};
+
     size_t head_length;
     if(packet.flags() & protocol::PacketFlag::NewProtocol) {
         if(packet.payload_length() < 3 + 10) {
@@ -163,6 +165,8 @@ void WhisperHandler::signal_session_reset() {
 }
 
 void WhisperHandler::handle_session_reset() {
+    std::lock_guard process_lock{this->whisper_head_mutex};
+
     this->session_state = SessionState::Uninitialized;
     if(this->whisper_head_ptr) {
         ::free(this->whisper_head_ptr);

server/src/client/shared/WhisperHandler.h

@@ -61,6 +61,7 @@ namespace ts::server::whisper {
             SessionState session_state{SessionState::Uninitialized};
             std::chrono::system_clock::time_point session_timestamp{};
 
+            std::mutex whisper_head_mutex{};
             void* whisper_head_ptr{nullptr};
             size_t whisper_head_length{0};
             size_t whisper_head_capacity{0};