+
+ # Multistream configuration, increments source values only
+ ms_mod = list() # mod list for incrementing values to be populated based on layer
+ if traffic['multistream'] > 1:
+ if traffic['stream_type'].upper() == 'L2':
+ for _ in [base_pkt_a, base_pkt_b]:
+ ms_mod += [STLVmFlowVar(name="mac_start", min_value=0,
+ max_value=traffic['multistream'] - 1, size=4, op="inc"),
+ STLVmWrFlowVar(fv_name="mac_start", pkt_offset=7)]
+ elif traffic['stream_type'].upper() == 'L3':
+ ip_src = {"start": int(netaddr.IPAddress(traffic['l3']['srcip'])),
+ "end": int(netaddr.IPAddress(traffic['l3']['srcip'])) + traffic['multistream'] - 1}
+ ip_dst = {"start": int(netaddr.IPAddress(traffic['l3']['dstip'])),
+ "end": int(netaddr.IPAddress(traffic['l3']['dstip'])) + traffic['multistream'] - 1}
+ for ip_address in [ip_src, ip_dst]:
+ ms_mod += [STLVmFlowVar(name="ip_src", min_value=ip_address['start'],
+ max_value=ip_address['end'], size=4, op="inc"),
+ STLVmWrFlowVar(fv_name="ip_src", pkt_offset="IP.src")]
+ elif traffic['stream_type'].upper() == 'L4':
+ for udpport in [traffic['l4']['srcport'], traffic['l4']['dstport']]:
+ if udpport + (traffic['multistream'] - 1) > 65535:
+ start_port = udpport
+ # find the max/min port number based on the loop around of 65535 to 0 if needed
+ minimum_value = 65535 - (traffic['multistream'] -1)
+ maximum_value = 65535
+ else:
+ start_port, minimum_value = udpport, udpport
+ maximum_value = start_port + (traffic['multistream'] - 1)
+ ms_mod += [STLVmFlowVar(name="port_src", init_value=start_port,
+ min_value=minimum_value, max_value=maximum_value,
+ size=2, op="inc"),
+ STLVmWrFlowVar(fv_name="port_src", pkt_offset="UDP.sport"),]
+
+ if ms_mod: # multistream detected
+ pkt_a = STLPktBuilder(pkt=base_pkt_a/payload_a, vm=[ms_mod[0], ms_mod[1]])
+ pkt_b = STLPktBuilder(pkt=base_pkt_b/payload_b, vm=[ms_mod[2], ms_mod[3]])
+ else:
+ pkt_a = STLPktBuilder(pkt=base_pkt_a / payload_a)
+ pkt_b = STLPktBuilder(pkt=base_pkt_b / payload_b)
+