src/plugins/nat/extras/nat_test_fast_path.py

   1 from trex_stl_lib.api import *
   2
   3
   4 class STLS1:
   5     def create_stream(self):
   6         # base_pkt = Ether()/IP(dst="2.2.0.1")/UDP(dport=12)
   7
   8         # pad = Padding()
   9         # if len(base_pkt) < 64:
  10         #     pad_len = 64 - len(base_pkt)
  11         #     pad.load = '\x00' * pad_len
  12
  13         # vm = STLVM()
  14
  15         # vm.tuple_var(name="tuple", ip_min="10.0.0.3", ip_max="10.0.0.202", port_min=1025, port_max=61124, limit_flows = 100000)
  16
  17         # vm.write(fv_name="tuple.ip", pkt_offset="IP.src")
  18         # vm.fix_chksum()
  19
  20         # vm.write(fv_name="tuple.port", pkt_offset="UDP.sport")
  21
  22         # pkt = STLPktBuilder(pkt=base_pkt/pad, vm=vm)
  23
  24         # return STLStream(packet=pkt, mode=STLTXCont())
  25
  26         vm = STLScVmRaw(
  27             [
  28                 STLVmTupleGen(
  29                     ip_min="10.0.0.1",
  30                     ip_max="10.255.255.254",
  31                     port_min=1025,
  32                     port_max=65535,
  33                     # name="stuple", limit_flows=10000),
  34                     name="stuple",
  35                     limit_flows=100,
  36                 ),
  37                 STLVmTupleGen(
  38                     ip_min="2.0.0.1",
  39                     ip_max="2.255.255.254",
  40                     port_min=1025,
  41                     port_max=65535,
  42                     # name="dtuple", limit_flows=100000000),
  43                     name="dtuple",
  44                     limit_flows=100,
  45                 ),
  46                 # write ip to packet IP.src
  47                 STLVmWrFlowVar(fv_name="stuple.ip", pkt_offset="IP.src"),
  48                 STLVmWrFlowVar(fv_name="dtuple.ip", pkt_offset="IP.dst"),
  49                 # fix checksum
  50                 STLVmFixIpv4(offset="IP"),
  51                 # write udp.port
  52                 STLVmWrFlowVar(fv_name="stuple.port", pkt_offset="UDP.sport"),
  53                 STLVmWrFlowVar(fv_name="dtuple.port", pkt_offset="UDP.dport"),
  54             ]
  55         )
  56
  57         base_pkt = (
  58             Ether() / IP(src="16.0.0.1", dst="2.0.0.1") / UDP(dport=12, sport=1025)
  59         )
  60         pad = Padding()
  61         if len(base_pkt) < 64:
  62             pad_len = 64 - len(base_pkt)
  63             pad.load = "\x00" * pad_len
  64
  65         pkt = STLPktBuilder(pkt=base_pkt / pad, vm=vm)
  66
  67         return STLStream(packet=pkt, mode=STLTXCont())
  68
  69     def get_streams(self, direction=0, **kwargs):
  70         return [self.create_stream()]
  71
  72
  73 # dynamic load - used for trex console or simulator
  74 def register():
  75     return STLS1()