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### UDP 9K+14(MAC) random pkt size ###
#####################################
- name: "random"
stream:
self_start: True
packet:
binary: stl/ipv4_udp_9k.pcap # should not include CRC 9K ip+14 = 9230 +FCS(by NIC)=9234
mode:
type: continuous
pps: 100
rx_stats: []
# random packet size 60-max packet size update ip.len/checksum/udp.len
vm:
instructions:
- type : "flow_var" # define random varible 60-9230
name : "var_rand_pkt_size"
op : "random"
init_value : 0
min_value : 60
max_value : 9230 # range must be smaller than pkt size
size : 2
- type : "trim_pkt_size" # trim packet size
name : "var_rand_pkt_size"
- type : "write_flow_var" # update ip.len
name : "var_rand_pkt_size"
add_value : -14
is_big_endian: true
pkt_offset : 16
- type : "fix_checksum_ipv4" # update ip.checksum
pkt_offset : 14
- type : "write_flow_var" # update udp.len
name : "var_rand_pkt_size"
add_value : -34
is_big_endian : true
pkt_offset : 38
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