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Update telnet_server.py

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Set tcp keepalive timers to 60 seconds. Seems to default to 2 hours on ubuntu 22. Most firewalls will age out an idle tcp session at 1 hour.

Will not address telnet console failing after a tcp session has failed (TimeoutError).
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John Fleming 2024-01-23 13:15:17 -05:00 committed by GitHub
parent 85fd3ef4a4
commit ac86717bc0
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gns3server/utils/asyncio/telnet_server.py
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@ -190,6 +190,11 @@ class AsyncioTelnetServer:
sock = network_writer.get_extra_info("socket") sock = network_writer.get_extra_info("socket")
sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1) sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1) sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
# 60 sec keep alives, close tcp session after 4 missed
# Will keep a firewall from aging out telnet console.
writer_sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, 60)
writer_sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, 10)
writer_sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, 4)
#log.debug("New connection from {}".format(sock.getpeername())) #log.debug("New connection from {}".format(sock.getpeername()))
# Keep track of connected clients # Keep track of connected clients