def callback(msg, _):
"""Callback function called by libnl upon receiving messages from the kernel.
Positional arguments:
msg -- nl_msg class instance containing the data sent by the kernel.
Returns:
An integer, value of NL_OK. It tells libnl to proceed with processing the next kernel message.
"""
# First convert `msg` into something more manageable.
nlh = nlmsg_hdr(msg)
iface = ifinfomsg(nlmsg_data(nlh))
hdr = IFLA_RTA(iface)
remaining = ctypes.c_int(nlh.nlmsg_len - NLMSG_LENGTH(iface.SIZEOF))
# Now iterate through each rtattr stored in `iface`.
while RTA_OK(hdr, remaining):
# Each rtattr (which is what hdr is) instance is only one type. Looping through all of them until we run into
# the ones we care about.
if hdr.rta_type == IFLA_IFNAME:
print('Found network interface {0}: {1}'.format(
iface.ifi_index,
get_string(RTA_DATA(hdr)).decode('ascii')))
hdr = RTA_NEXT(hdr, remaining)
return NL_OK
def callback(msg, arg):
nlh = nlmsg_hdr(msg)
iface = ifinfomsg(nlmsg_data(nlh))
hdr = IFLA_RTA(iface)
remaining = c_int(nlh.nlmsg_len - NLMSG_LENGTH(iface.SIZEOF))
while RTA_OK(hdr, remaining):
if hdr.rta_type == IFLA_IFNAME:
arg[int(iface.ifi_index)] = str(get_string(RTA_DATA(hdr)).decode('ascii'))
hdr = RTA_NEXT(hdr, remaining)
return NL_OK
def callback(msg, _):
"""Callback function called by libnl upon receiving messages from the kernel.
Positional arguments:
msg -- nl_msg class instance containing the data sent by the kernel.
Returns:
An integer, value of NL_OK. It tells libnl to proceed with processing the next kernel message.
"""
# First convert `msg` into something more manageable.
nlh = nlmsg_hdr(msg)
iface = ifinfomsg(nlmsg_data(nlh))
hdr = IFLA_RTA(iface)
remaining = ctypes.c_int(nlh.nlmsg_len - NLMSG_LENGTH(iface.SIZEOF))
# Now iterate through each rtattr stored in `iface`.
while RTA_OK(hdr, remaining):
# Each rtattr (which is what hdr is) instance is only one type. Looping through all of them until we run into
# the ones we care about.
if hdr.rta_type == IFLA_IFNAME:
print('Found network interface {0}: {1}'.format(iface.ifi_index, get_string(RTA_DATA(hdr)).decode('ascii')))
hdr = RTA_NEXT(hdr, remaining)
return NL_OK