from trex_stl_lib.api import * # x clients override the LSB of destination #Base src ip : 55.55.1.1, dst ip: Fixed #Increment src ipt portion starting at 55.55.1.1 for 'n' number of clients (55.55.1.1, 55.55.1.2) #Src MAC: start with 0000.dddd.0001, increment mac in steps of 1 #Dst MAC: Fixed (will be taken from trex_conf.yaml class STLS1(object): def __init__ (self): self.num_clients =30000; # max is 16bit self.fsize =64 def create_stream (self): # Create base packet and pad it to size size = self.fsize - 4; # HW will add 4 bytes ethernet FCS base_pkt = Ether(src="00:00:dd:dd:00:01")/IP(src="55.55.1.1",dst="58.0.0.1")/UDP(dport=12,sport=1025) pad = max(0, size - len(base_pkt)) * 'x' vm = STLScVmRaw( [ STLVmFlowVar(name="mac_src", min_value=1, max_value=self.num_clients, size=2, op="inc"), # 1 byte varible, range 1-10 STLVmWrFlowVar(fv_name="mac_src", pkt_offset= 10), # write it to LSB of ethernet.src STLVmWrFlowVar(fv_name="mac_src" ,pkt_offset="IP.src",offset_fixup=2), # it is 2 byte so there is a need to fixup in 2 bytes STLVmFixIpv4(offset = "IP") ] ) return STLStream(packet = STLPktBuilder(pkt = base_pkt/pad,vm = vm), mode = STLTXCont( pps=10 )) def get_streams (self, direction = 0, **kwargs): # create 1 stream return [ self.create_stream() ] # dynamic load - used for trex console or simulator def register(): return STLS1()