from trex_stl_lib.api import * class STLS1: def create_stream (self): base_pkt = Ether()/IP(dst="2.2.0.1")/UDP(dport=12) pad = Padding() if len(base_pkt) < 64: pad_len = 64 - len(base_pkt) pad.load = '\x00' * pad_len vm = STLVM() vm.tuple_var(name="tuple", ip_min="10.0.0.3", ip_max="10.1.134.162", port_min=1025, port_max=1124, limit_flows=10000000) vm.write(fv_name="tuple.ip", pkt_offset="IP.src") vm.fix_chksum() vm.write(fv_name="tuple.port", pkt_offset="UDP.sport") pkt = STLPktBuilder(pkt=base_pkt/pad, vm=vm) return STLStream(packet=pkt, mode=STLTXCont()) def get_streams (self, direction = 0, **kwargs): return [self.create_stream()] # dynamic load - used for trex console or simulator def register(): return STLS1()