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#!/router/bin/python
from trex_stl_exceptions import *
from trex_stl_packet_builder_interface import CTrexPktBuilderInterface
from trex_stl_packet_builder_scapy import CScapyTRexPktBuilder, Ether, IP
from collections import OrderedDict, namedtuple
from trex_control_plane.client_utils.yaml_utils import *
from dpkt import pcap
import random
import yaml
import base64
# base class for TX mode
class STLTXMode(object):
def __init__ (self):
self.fields = {}
def to_json (self):
return self.fields
# continuous mode
class STLTXCont(STLTXMode):
def __init__ (self, pps = 1):
if not isinstance(pps, (int, float)):
raise STLArgumentError('pps', pps)
super(STLTXCont, self).__init__()
self.fields['type'] = 'continuous'
self.fields['pps'] = pps
# single burst mode
class STLTXSingleBurst(STLTXMode):
def __init__ (self, pps = 1, total_pkts = 1):
if not isinstance(pps, (int, float)):
raise STLArgumentError('pps', pps)
if not isinstance(total_pkts, int):
raise STLArgumentError('total_pkts', total_pkts)
super(STLTXSingleBurst, self).__init__()
self.fields['type'] = 'single_burst'
self.fields['pps'] = pps
self.fields['total_pkts'] = total_pkts
# multi burst mode
class STLTXMultiBurst(STLTXMode):
def __init__ (self,
pps = 1,
pkts_per_burst = 1,
ibg = 0.0,
count = 1):
if not isinstance(pps, (int, float)):
raise STLArgumentError('pps', pps)
if not isinstance(pkts_per_burst, int):
raise STLArgumentError('pkts_per_burst', pkts_per_burst)
if not isinstance(ibg, (int, float)):
raise STLArgumentError('ibg', ibg)
if not isinstance(count, int):
raise STLArgumentError('count', count)
super(STLTXMultiBurst, self).__init__()
self.fields['type'] = 'multi_burst'
self.fields['pps'] = pps
self.fields['pkts_per_burst'] = pkts_per_burst
self.fields['ibg'] = ibg
self.fields['count'] = count
class STLStream(object):
def __init__ (self,
packet = None,
mode = STLTXCont(1),
enabled = True,
self_start = True,
isg = 0.0,
rx_stats = None,
next_stream_id = -1,
stream_id = None):
# type checking
if not isinstance(mode, STLTXMode):
raise STLArgumentError('mode', mode)
if packet and not isinstance(packet, CTrexPktBuilderInterface):
raise STLArgumentError('packet', packet)
if not isinstance(enabled, bool):
raise STLArgumentError('enabled', enabled)
if not isinstance(self_start, bool):
raise STLArgumentError('self_start', self_start)
if not isinstance(isg, (int, float)):
raise STLArgumentError('isg', isg)
if (type(mode) == STLTXCont) and (next_stream_id != -1):
raise STLError("continuous stream cannot have a next stream ID")
self.fields = {}
# use a random 31 bit for ID
self.fields['stream_id'] = stream_id if stream_id is not None else random.getrandbits(31)
# basic fields
self.fields['enabled'] = enabled
self.fields['self_start'] = self_start
self.fields['isg'] = isg
self.fields['next_stream_id'] = next_stream_id
# mode
self.fields['mode'] = mode.to_json()
self.fields['packet'] = {}
self.fields['vm'] = {}
if not packet:
packet = CScapyTRexPktBuilder(pkt = Ether()/IP())
# packet builder
packet.compile()
# packet and VM
self.fields['packet'] = packet.dump_pkt()
self.fields['vm'] = packet.get_vm_data()
self.fields['rx_stats'] = {}
if not rx_stats:
self.fields['rx_stats']['enabled'] = False
def __str__ (self):
return json.dumps(self.fields, indent = 4, separators=(',', ': '), sort_keys = True)
def to_json (self):
return self.fields
def get_id (self):
return self.fields['stream_id']
@staticmethod
def dump_to_yaml (stream_list, yaml_file = None):
# type check
if isinstance(stream_list, STLStream):
stream_list = [stream_list]
if not all([isinstance(stream, STLStream) for stream in stream_list]):
raise STLArgumentError('stream_list', stream_list)
names = {}
for i, stream in enumerate(stream_list):
names[stream.get_id()] = "stream-{0}".format(i)
yaml_lst = []
for stream in stream_list:
fields = dict(stream.fields)
# handle the next stream id
if fields['next_stream_id'] == -1:
del fields['next_stream_id']
else:
if not stream.get_id() in names:
raise STLError('broken dependencies in stream list')
fields['next_stream'] = names[stream.get_id()]
# add to list
yaml_lst.append({'name': names[stream.get_id()], 'stream': fields})
# write to file
x = yaml.dump(yaml_lst, default_flow_style=False)
if yaml_file:
with open(yaml_file, 'w') as f:
f.write(x)
return x
@staticmethod
def load_from_yaml (yaml_file):
with open(yaml_file, 'r') as f:
yaml_str = f.read()
# load YAML
lst = yaml.load(yaml_str)
# decode to streams
streams = []
for stream in lst:
# for defaults
defaults = STLStream()
s = STLStream(packet = None,
mode = STLTXCont(1),
enabled = True,
self_start = True,
isg = 0.0,
rx_stats = None,
next_stream_id = -1,
stream_id = None
)
streams.append(s)
return streams
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