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selftests: drv-net: Make rand_port() get a port more reliably

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Instead of guessing a port and checking whether it's available, get an
available port from the OS.

Reviewed-by: Nimrod Oren <noren@nvidia.com>
Signed-off-by: Gal Pressman <gal@nvidia.com>
Link: https://patch.msgid.link/20250224174416.499070-4-gal@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Gal Pressman
2025-02-24 19:44:15 +02:00
committed by Jakub Kicinski
parent 4d20c9f2db
commit 0163250039
1 changed files with 4 additions and 11 deletions
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15
tools/testing/selftests/net/lib/py/utils.py
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@@ -187,18 +187,11 @@ def ethtool(args, json=None, ns=None, host=None):
def rand_port():
"""
Get a random unprivileged port, try to make sure it's not already used.
Get a random unprivileged port.
"""
for _ in range(1000):
port = random.randint(10000, 65535)
try:
with socket.socket(socket.AF_INET6, socket.SOCK_STREAM) as s:
s.bind(("", port))
return port
except OSError as e:
if e.errno != errno.EADDRINUSE:
raise
raise Exception("Can't find any free unprivileged port")
with socket.socket(socket.AF_INET6, socket.SOCK_STREAM) as s:
s.bind(("", 0))
return s.getsockname()[1]
def wait_port_listen(port, proto="tcp", ns=None, host=None, sleep=0.005, deadline=5):