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do not fail on linux < 4.12 #4424

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do not fail on linux < 4.12 #4424

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6 changes: 5 additions & 1 deletion scapy/arch/linux/rtnetlink.py
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Original file line number Diff line number Diff line change
Expand Up @@ -715,7 +715,11 @@ def _sr1_rtrequest(pkt: Packet) -> List[Packet]:
# Configure socket
sock.setsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF, 32768)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 1048576)
sock.setsockopt(SOL_NETLINK, NETLINK_EXT_ACK, 1)
try:
sock.setsockopt(SOL_NETLINK, NETLINK_EXT_ACK, 1) # this is only supported after Linux 4.12
except OSError:
log_loading.warning("Failed to read the routes using RTNETLINK !")
return []
sock.bind((0, 0)) # bind to kernel
sock.setsockopt(SOL_NETLINK, NETLINK_GET_STRICT_CHK, 1)
# Request routes
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