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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 a base packet and pad it to size
size = self.fsize - 4; # no FCS
base_pkt = Ether()/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 = CTRexScRaw( [ STLVmFlowVar(name="mac_src", min_value=1, max_value=self.num_clients, size=2, op="inc"), # 1 byte varible, range 1-10
STLVmFlowVar(name="mac_src_wa", min_value=0x0000dddd, max_value=0x0000dddd, size=4, op="inc"), # workaround hardcoded the src MAC MSB, will be solved as an option in the stream
STLVmWrFlowVar(fv_name="mac_src_wa", pkt_offset= 6), # write constrant 0000.ddddd
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"),
]
,split_by_field = "mac_src" # split
)
return STLStream(packet = STLPktBuilder(pkt = base_pkt/pad,vm = vm),
mode = STLTXCont( pps=10 ))
def get_streams (self, direction = 0):
# create 1 stream
return [ self.create_stream() ]
# dynamic load - used for trex console or simulator
def register():
return STLS1()
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