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from trex_stl_lib.api import *
class STLS1(object):
def create_stream (self, packet_len):
# create a base packet and pad it to size
base_pkt = Ether()/IP(src="16.0.0.1",dst="48.0.0.1")/UDP(dport=12,sport=1025)
pad = max(0, packet_len - len(base_pkt)) * 'x'
vm = STLScVmRaw( [ STLVmTupleGen ( ip_min="16.0.0.1", ip_max="16.0.0.2",
port_min=1025, port_max=65535,
name="tuple"), # define tuple gen
STLVmWrFlowVar (fv_name="tuple.ip", pkt_offset= "IP.src" ), # write ip to packet IP.src
STLVmFixIpv4(offset = "IP"), # fix checksum
STLVmWrFlowVar (fv_name="tuple.port", pkt_offset= "UDP.sport" ) #write udp.port
]
);
pkt = STLPktBuilder(pkt = base_pkt/pad,
vm = vm)
return STLStream(packet = pkt,
mode = STLTXCont())
def get_streams (self, direction = 0, packet_len = 64, **kwargs):
# create 1 stream
return [ self.create_stream(packet_len - 4) ]
# dynamic load - used for trex console or simulator
def register():
return STLS1()
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