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import os
from trex_stl_lib.api import *
# PCAP profile
class STLPcap(object):
def __init__ (self, pcap_file):
self.pcap_file = pcap_file
def create_vm (self, ip_src_range, ip_dst_range):
if not ip_src_range and not ip_dst_range:
return None
# until the feature of offsets will be fixed for PCAP use hard coded offsets
vm = []
if ip_src_range:
vm += [STLVmFlowVar(name="src", min_value = ip_src_range['start'], max_value = ip_src_range['end'], size = 4, op = "inc"),
#STLVmWrFlowVar(fv_name="src",pkt_offset= "IP.src")
STLVmWrFlowVar(fv_name="src",pkt_offset = 26)
]
if ip_dst_range:
vm += [STLVmFlowVar(name="dst", min_value = ip_dst_range['start'], max_value = ip_dst_range['end'], size = 4, op = "inc"),
#STLVmWrFlowVar(fv_name="dst",pkt_offset= "IP.dst")
STLVmWrFlowVar(fv_name="dst",pkt_offset = 30)
]
vm += [#STLVmFixIpv4(offset = "IP")
STLVmFixIpv4(offset = 14)
]
return vm
def get_streams (self,
ipg_usec = 10.0,
loop_count = 5,
ip_src_range = None,
ip_dst_range = {'start' : '10.0.0.1', 'end': '10.0.0.254'}):
vm = self.create_vm(ip_src_range, ip_dst_range)
profile = STLProfile.load_pcap(self.pcap_file, ipg_usec = ipg_usec, loop_count = loop_count, vm = vm)
return profile.get_streams()
# dynamic load - used for trex console or simulator
def register():
# get file relative to profile dir
return STLPcap(os.path.join(os.path.dirname(__file__), 'sample.pcap'))
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