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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 base packet and pad it to size
size = self.fsize - 4; # HW will add 4 bytes ethernet 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()
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