from trex_stl_lib.api import * # split the range of IP to cores # class STLS1(object): def __init__ (self): 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()/IP(src="16.0.0.1",dst="48.0.0.1")/UDP(dport=12,sport=1025) pad = max(0, size - len(base_pkt)) * 'x' vm = STLScVmRaw( [ STLVmFlowVar ( "ip_src", min_value="10.0.0.1", max_value="10.0.0.255", size=4, step=1,op="inc"), STLVmWrFlowVar (fv_name="ip_src", pkt_offset= "IP.src" ), # write ip to packet IP.src STLVmFixIpv4(offset = "IP") # fix checksum ] ,split_by_field = "ip_src" # split to cores base on the tuple generator ,cache_size =255 # the cache size ); pkt = STLPktBuilder(pkt = base_pkt/pad, vm = vm) stream = STLStream(packet = pkt, mode = STLTXCont()) #print(stream.to_code()) return stream 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()