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| Dir : //proc/self/root/opt/saltstack/salt/extras-3.10/pyroute2/netlink/rtnl/tcmsg/cls_flow.py |
'''
flow
++++
Flow filter supports two types of modes::
- map
- hash
# Prepare a Qdisc with fq-codel
ip.tc("add", "fq_codel", ifb0,
parent=0x10001, handle=0x10010)
# Create flow filter with hash mode
# Single:
keys = "src"
# Multi (comma separated list of keys):
keys = "src,nfct-src"
ip.tc("add-filter", "flow", ifb0,
mode="hash", keys=keys,
divisor=1024, perturb=60,
handle=0x10, baseclass=0x10010,
parent=0x10001)
# Create flow filter with map mode
# Simple map dst with no OP:
ip.tc("add-filter", "flow", ifb0,
mode="map", key="dst",
divisor=1024, handle=10
baseclass=0x10010)
# Same filter with xor OP:
ops = [{"op": "xor", "num": 0xFF}]
ip.tc("add-filter", "flow", ifb0,
mode="map", key="dst",
divisor=1024, handle=10
baseclass=0x10010, ops=ops)
# Complex one with addend OP (incl. minus support):
ops = [{"op": "addend", "num": '-192.168.0.0'}]
ip.tc("add-filter", "flow", ifb0,
mode="map", key="dst",
divisor=1024, handle=10
baseclass=0x10010, ops=ops)
# Example with multiple OPS:
ops = [{"op": "and", "num": 0xFF},
{"op": "rshift", "num": 4}]
ip.tc("add-filter", "flow", ifb0,
mode="map", key="dst",
divisor=1024, handle=10
baseclass=0x10010, ops=ops)
NOTES:
When using `map` mode, use the keyword `key` to pass a key.
When using `hash` mode, use the keyword `keys` to pass a key
even if there is only one key.
In `map` mode, the `num` parameter in `OPS` is always an
integer unless if you use the OP `addend`, which can be
a string IPv4 address. You can also add a minus sign at
the beginning of the `num` value even if it is an IPv4
address.
'''
from socket import htons
from pyroute2 import protocols
from pyroute2.netlink import nla
from pyroute2.netlink.rtnl.tcmsg.common import (
get_tca_keys,
get_tca_mode,
get_tca_ops,
tc_flow_keys,
tc_flow_modes,
)
from pyroute2.netlink.rtnl.tcmsg.common_act import get_tca_action, tca_act_prio
def fix_msg(msg, kwarg):
msg['info'] = htons(
kwarg.get('protocol', protocols.ETH_P_ALL) & 0xFFFF
) | ((kwarg.get('prio', 0) << 16) & 0xFFFF0000)
def get_parameters(kwarg):
ret = {'attrs': []}
attrs_map = (
('baseclass', 'TCA_FLOW_BASECLASS'),
('divisor', 'TCA_FLOW_DIVISOR'),
('perturb', 'TCA_FLOW_PERTURB'),
)
if kwarg.get('mode'):
ret['attrs'].append(['TCA_FLOW_MODE', get_tca_mode(kwarg)])
if kwarg.get('mode') == 'hash':
ret['attrs'].append(['TCA_FLOW_KEYS', get_tca_keys(kwarg, 'keys')])
if kwarg.get('mode') == 'map':
ret['attrs'].append(['TCA_FLOW_KEYS', get_tca_keys(kwarg, 'key')])
# Check for OPS presence
if 'ops' in kwarg:
get_tca_ops(kwarg, ret['attrs'])
if kwarg.get('action'):
ret['attrs'].append(['TCA_FLOW_ACT', get_tca_action(kwarg)])
for k, v in attrs_map:
r = kwarg.get(k, None)
if r is not None:
ret['attrs'].append([v, r])
return ret
class options(nla):
nla_map = (
('TCA_FLOW_UNSPEC', 'none'),
('TCA_FLOW_KEYS', 'tca_parse_keys'),
('TCA_FLOW_MODE', 'tca_parse_mode'),
('TCA_FLOW_BASECLASS', 'uint32'),
('TCA_FLOW_RSHIFT', 'uint32'),
('TCA_FLOW_ADDEND', 'uint32'),
('TCA_FLOW_MASK', 'uint32'),
('TCA_FLOW_XOR', 'uint32'),
('TCA_FLOW_DIVISOR', 'uint32'),
('TCA_FLOW_ACT', 'tca_act_prio'),
('TCA_FLOW_POLICE', 'hex'),
('TCA_FLOW_EMATCHES', 'hex'),
('TCA_FLOW_PERTURB', 'uint32'),
)
class tca_parse_mode(nla):
fields = (('flow_mode', 'I'),)
def decode(self):
nla.decode(self)
for key, value in tc_flow_modes.items():
if self['flow_mode'] == value:
self['flow_mode'] = key
break
def encode(self):
self['flow_mode'] = self['value']
nla.encode(self)
class tca_parse_keys(nla):
fields = (('flow_keys', 'I'),)
def decode(self):
nla.decode(self)
keys = ''
for key, value in tc_flow_keys.items():
if value & self['flow_keys']:
keys = '{0},{1}'.format(keys, key)
self['flow_keys'] = keys.strip(',')
def encode(self):
self['flow_keys'] = self['value']
nla.encode(self)
tca_act_prio = tca_act_prio