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#
# Copyright (C) 2022 Soleta Networks <info@soleta.eu>
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the
# Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
import array
import fcntl
import socket
import struct
import psutil
import logging
def is_ethernet(interface):
SIOCGIFHWADDR = 0x8927
ARPHRD_ETHER = 1
try:
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
info = fcntl.ioctl(
s.fileno(),
SIOCGIFHWADDR,
struct.pack('256s', interface.encode('utf-8')[:15]))
if struct.unpack('H', info[16:18])[0] == ARPHRD_ETHER:
return True
return False
except IOError:
return False
finally:
s.close()
def is_wifi(interface):
SIOCGIWNAME = 0x8B01 # Wireless-specific ioctl
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
buffer = struct.pack('256s', interface.encode('utf-8'))
info = fcntl.ioctl(sock.fileno(), SIOCGIWNAME, buffer)
return True
except IOError:
return False
finally:
sock.close()
def is_link_active(interface):
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
# Get interface flags
ifreq = struct.pack('16sh', interface.encode('utf-8'), 0)
flags = struct.unpack('16sh', fcntl.ioctl(sock.fileno(), 0x8913, ifreq))[1]
# Check if IFF_UP and IFF_RUNNING flags are set
if flags & 0x1 and flags & 0x40:
return True
else:
return False
except IOError:
return False
finally:
sock.close()
def get_ethernet_interface():
eth_interfaces = []
interfaces = psutil.net_if_addrs()
for interface in interfaces:
if is_ethernet(interface) and not is_wifi(interface) and is_link_active(interface):
eth_interfaces.append(interface)
if len(eth_interfaces) > 1:
logging.info(f'Multiple active ethernet interfaces found: {", ".join(eth_interfaces)}. Using {eth_interfaces[0]}')
if not eth_interfaces:
logging.info('No valid ethernet interface found')
return None
return eth_interfaces[0]
def ethtool(interface):
try:
ETHTOOL_GSET = 0x00000001
SIOCETHTOOL = 0x8946
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sockfd = sock.fileno()
ecmd = array.array(
"B", struct.pack("I39s", ETHTOOL_GSET, b"\x00" * 39)
)
interface = interface.encode("utf-8")
ifreq = struct.pack("16sP", interface, ecmd.buffer_info()[0])
fcntl.ioctl(sockfd, SIOCETHTOOL, ifreq)
res = ecmd.tobytes()
speed = struct.unpack("12xH29x", res)[0]
except IOError:
speed = 0
finally:
sock.close()
return speed
def getifaddr(device):
"""
"""
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
return socket.inet_ntoa(fcntl.ioctl(
s.fileno(),
0x8915, # SIOCGIFADDR
struct.pack('256s', bytes(device[:15], 'utf-8'))
)[20:24])
def getifhwaddr(device):
"""
"""
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
hwaddr = fcntl.ioctl(
s.fileno(),
0x8927, # SIOCGIFHWADDR
struct.pack('256s', bytes(device[:15], 'utf-8'))
)[18:24]
return "%02x:%02x:%02x:%02x:%02x:%02x" % struct.unpack("BBBBBB", hwaddr)
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