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| author |   Hanoh Haim <hhaim@cisco.com> | 2016-09-29 17:29:49 +0300 |
|---|---|---|
| committer | Hanoh Haim <hhaim@cisco.com> | 2016-09-29 17:29:49 +0300 |
| commit | c4392ff93b7994f33979329a6c0e070856876abb (patch) | |
| tree | c6980672627f0ce4c46886d3a8ebfb679d1cd711 /scripts | |
| parent | 8a881fcefc44d705df417a9ee0c70284124981d1 (diff) | |
minor fix hw_cs in case of random pkt size
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/stl/syn_attack_fix_cs_hw.py | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/scripts/stl/syn_attack_fix_cs_hw.py b/scripts/stl/syn_attack_fix_cs_hw.py index 4738f2b5..0d279fdd 100644 --- a/scripts/stl/syn_attack_fix_cs_hw.py +++ b/scripts/stl/syn_attack_fix_cs_hw.py @@ -195,10 +195,43 @@ class STLS1(object): random_seed = 0x1234,# can be remove. will give the same random value any run mode = STLTXCont()) + def create_stream_udp_random (self): + # pkt + p_l2 = Ether(); + p_l3 = IP(src="16.0.0.1",dst="48.0.0.1") + p_l4 = UDP(dport=12,sport=1025) + pyld_size = max(0, self.max_pkt_size_l3 - len(p_l3/p_l4)); + base_pkt = p_l2/p_l3/p_l4/('\x55'*(pyld_size)) + + l3_len_fix =-(len(p_l2)); + l4_len_fix =-(len(p_l2/p_l3)); + + + # vm + vm = STLScVmRaw( [ STLVmFlowVar(name="fv_rand", min_value=64, max_value=len(base_pkt), size=2, op="random"), + STLVmTrimPktSize("fv_rand"), # total packet size + STLVmWrFlowVar(fv_name="fv_rand", pkt_offset= "IP.len", add_val=l3_len_fix), # fix ip len + STLVmWrFlowVar(fv_name="fv_rand", pkt_offset= "UDP.len", add_val=l4_len_fix), # fix udp len + + STLVmFixChecksumHw(l3_offset = "IP", + l4_offset = "UDP", # not valid + l4_type = CTRexVmInsFixHwCs.L4_TYPE_UDP )# hint, TRex can know that + + ] + ) + + pkt = STLPktBuilder(pkt = base_pkt, + vm = vm) + + return STLStream(packet = pkt, + random_seed = 0x1234, + mode = STLTXCont()) + def get_streams (self, direction = 0, **kwargs): # create 1 stream #return [ self.create_stream_ipv6_udp(),self.create_stream_tcp_syn(), self.create_stream_udp1(),self.create_stream_ipv6_tcp()] + #return [ self.create_stream_udp_random () ] return [ self.create_stream_tcp_syn()] |