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[dualtor-io] fix dualtor sniffer start slow issue #18758

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Merged
bingwang-ms merged 1 commit into from
Jun 3, 2025
Merged

[dualtor-io] fix dualtor sniffer start slow issue #18758

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14 changes: 12 additions & 2 deletions tests/scripts/dual_tor_sniffer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,9 +5,19 @@
import scapy.all as scapyall


class L2ListenAllSocket(scapyall.conf.L2listen):
"""Read packets at layer2 using Linux PF_PACKET sockets on all ports."""

def __init__(self, *args, **kwargs):
# HACK: Set the socket bind to NOOP, so the packet sockets created
# will not bind to any interface and it will listen on all interfaces
# by default.
socket.bind = lambda _: None
super(L2ListenAllSocket, self).__init__(*args, **kwargs)


class Sniffer(object):
def __init__(self, filter=None, timeout=60):
self.ifaces = [iface for _, iface in socket.if_nameindex() if iface.startswith("eth")]
self.filter = filter
self.timeout = timeout
self.packets = []
Expand All @@ -17,7 +27,7 @@ def sniff(self):
logging.debug("scapy sniffer started: filter={}, timeout={}".format(
self.filter, self.timeout))
scapyall.sniff(
iface=self.ifaces,
L2socket=L2ListenAllSocket,
filter=self.filter,
prn=self.process_pkt,
timeout=self.timeout)
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