from trex_stl_lib.api import * # split the range of IP to cores # add tunable by fsize to change the size of the frame # latency frame is always 64 # trex>start -f stl/udp_1pkt_src_ip_split_latency.py -t fsize=64 -m 30% --port 0 --force # # class STLS1(object): def __init__ (self): self.fsize =64; self.lfsize =64; def create_stream (self, dir,port_id): # create a base packet and pad it to size size = self.fsize - 4; # no FCS if dir==0: src_ip="16.0.0.1" dst_ip="48.0.0.1" else: src_ip="48.0.0.1" dst_ip="16.0.0.1" base_pkt = Ether()/IP(src=src_ip,dst=dst_ip)/UDP(dport=12,sport=1025) pad = max(0, size - len(base_pkt)) * 'x' pad_latency = max(0, (self.lfsize-4) - 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(pps=1)), # latency stream STLStream(packet = STLPktBuilder(pkt = base_pkt/pad_latency), mode = STLTXCont(pps=1000), flow_stats = STLFlowLatencyStats(pg_id = 12+port_id)) ] return stream def get_streams (self, direction = 0, fsize = 64,lfsize = 64, **kwargs): self.fsize =fsize; self.lfsize =lfsize return self.create_stream(direction,kwargs['port_id']) # dynamic load - used for trex console or simulator def register(): return STLS1()