How to change tcp keepalive timer using python script?

by

You can set the TCP keepalive timers on an already-open socket using setsockopt().

import socket

def set_keepalive_linux(sock, after_idle_sec=1, interval_sec=3, max_fails=5):
    """Set TCP keepalive on an open socket.

    It activates after 1 second (after_idle_sec) of idleness,
    then sends a keepalive ping once every 3 seconds (interval_sec),
    and closes the connection after 5 failed ping (max_fails), or 15 seconds
    """
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
    sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, after_idle_sec)
    sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, interval_sec)
    sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, max_fails)

def set_keepalive_osx(sock, after_idle_sec=1, interval_sec=3, max_fails=5):
    """Set TCP keepalive on an open socket.

    sends a keepalive ping once every 3 seconds (interval_sec)
    """
    # scraped from /usr/include, not exported by python's socket module
    TCP_KEEPALIVE = 0x10
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
    sock.setsockopt(socket.IPPROTO_TCP, TCP_KEEPALIVE, interval_sec)

For equivalent options on windows refer to msdn.
Looking through the Python source, it seems you need to set SO_KEEPALIVE with sock.setsockopt similar to in Unix, and [optionally?] set SIO_KEEPALIVE_VALS with sock.ioctl.

More Related Contents:

  1. Python urllib2 with keep alive
  2. Discovering public IP programmatically
  3. Python socket.accept nonblocking?
  4. How to get a faster speed when using multi-threading in python
  5. python requests module and connection reuse
  6. Sending a file over TCP sockets in Python
  7. Unwanted RST TCP packet with Scapy
  8. Socket Programming Python: How to make sure entire message is received?
  9. Socket Programming Python: How to make sure entire message is received?
  10. What is “backlog” in TCP connections?
  11. How to parse packets in a python library? [closed]
  12. How to close a socket left open by a killed program?
  13. convert string to list [duplicate]
  14. Wait until page is loaded with Selenium WebDriver for Python
  15. Spawning multiple instances of the same object concurrently in python
  16. Save plot to image file instead of displaying it using Matplotlib
  17. Python error “ImportError: No module named”
  18. How to calculate rolling / moving average using python + NumPy / SciPy?
  19. Converting from a string to boolean in Python?
  20. Applying function with multiple arguments to create a new pandas column
  21. Why does this not work as an array membership test? [duplicate]
  22. Django DB Settings ‘Improperly Configured’ Error
  23. increment int object
  24. Detect and visualize differences between two images with OpenCV Python
  25. Get all child elements
  26. Tell urllib2 to use custom DNS
  27. OpenCV TypeError: Expected cv::UMat for argument ‘src’ – What is this?
  28. How do I print the model summary in PyTorch?
  29. gspread authentication throwing insufficient permission
  30. How do I access dictionary keys that contain hyphens from within a Django template?

Leave a Comment