mirror of https://github.com/Kkevsterrr/geneva
572 lines
18 KiB
Python
572 lines
18 KiB
Python
import pytest
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import actions.utils
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import actions.trigger
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import layers.packet
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import layers.layer
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import layers.tcp_layer
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import layers.dns_layer
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import layers.dnsqr_layer
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import layers.udp_layer
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import layers.ip_layer
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import evolve
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from scapy.all import IP, TCP, UDP, DNS, DNSQR, Raw, DNSRR
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def test_parse_layers():
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"""
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Tests layer parsing.
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"""
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pkt = IP()/TCP()/Raw("")
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packet = layers.packet.Packet(pkt)
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layers_l = list(packet.read_layers())
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assert layers_l[0].name == "IP"
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assert layers_l[1].name == "TCP"
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layers_dict = packet.setup_layers()
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assert layers_dict["IP"]
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assert layers_dict["TCP"]
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def test_get_random():
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"""
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Tests get random
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"""
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tcplayer = layers.tcp_layer.TCPLayer(TCP())
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field, value = tcplayer.get_random()
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assert field in layers.tcp_layer.TCPLayer.fields
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def test_gen_random():
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"""
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Tests gen random
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"""
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for i in range(0, 2000):
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layer, field, value = layers.packet.Packet().gen_random()
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assert layer in [DNS, TCP, UDP, IP, DNSQR]
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def test_dnsqr():
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"""
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Tests DNSQR.
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"""
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pkt = UDP()/DNS(ancount=1)/DNSQR()
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pkt.show()
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packet = layers.packet.Packet(pkt)
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packet.show()
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assert len(packet.layers) == 3
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assert "UDP" in packet.layers
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assert "DNS" in packet.layers
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assert "DNSQR" in packet.layers
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pkt = IP()/UDP()/DNS()/DNSQR()
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packet = layers.packet.Packet(pkt)
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assert str(packet)
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def test_load():
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"""
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Tests loads.
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"""
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tcp = layers.tcp_layer.TCPLayer(TCP())
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load = tcp.gen("load")
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pkt = IP()/"datadata"
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p = layers.packet.Packet(pkt)
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assert p.get("IP", "load") == "datadata"
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p2 = layers.packet.Packet(IP(bytes(p)))
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assert p2.get("IP", "load") == "datadata"
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p2.set("IP", "load", "data2")
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# Check p is unchanged
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assert p.get("IP", "load") == "datadata"
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assert p2.get("IP", "load") == "data2"
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p2.show2()
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# Check that we can dump
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assert p2.show2(dump=True)
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# Check that we can dump
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assert p2.show(dump=True)
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assert p2.get("IP", "chksum") == None
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pkt = IP()/TCP()/"datadata"
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p = layers.packet.Packet(pkt)
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assert p.get("TCP", "load") == "datadata"
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p2 = layers.packet.Packet(IP(bytes(p)))
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assert p2.get("TCP", "load") == "datadata"
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p2.set("TCP", "load", "data2")
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# Check p is unchanged
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assert p.get("TCP", "load") == "datadata"
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assert p2.get("TCP", "load") == "data2"
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p2.show2()
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assert p2.get("IP", "chksum") == None
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def test_parse_load(logger):
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"""
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Tests load parsing.
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"""
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pkt = layers.packet.Packet(IP()/TCP()/"TYPE A\r\n")
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print("Parsed: %s" % pkt.get("TCP", "load"))
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strat = actions.utils.parse("[TCP:load:TYPE%20A%0D%0A]-drop-| \/", logger)
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results = strat.act_on_packet(pkt, logger)
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assert not results
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value = pkt.gen("TCP", "load") + " " + pkt.gen("TCP", "load")
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pkt.set("TCP", "load", value)
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assert " " not in pkt.get("TCP", "load"), "%s contained a space!" % pkt.get("TCP", "load")
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def test_dns():
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"""
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Tests DNS layer.
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"""
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dns = layers.dns_layer.DNSLayer(DNS())
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print(dns.gen("id"))
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assert dns.gen("id")
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p = layers.packet.Packet(DNS(id=0xabcd))
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p2 = layers.packet.Packet(DNS(bytes(p)))
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assert p.get("DNS", "id") == 0xabcd
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assert p2.get("DNS", "id") == 0xabcd
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p2.set("DNS", "id", 0x4321)
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assert p.get("DNS", "id") == 0xabcd # Check p is unchanged
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assert p2.get("DNS", "id") == 0x4321
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dns = layers.packet.Packet(DNS(aa=1))
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assert dns.get("DNS", "aa") == 1
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aa = dns.gen("DNS", "aa")
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assert aa == 0 or aa == 1
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assert dns.get("DNS", "aa") == 1 # Original value unchanged
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dns = layers.packet.Packet(DNS(opcode=15))
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assert dns.get("DNS", "opcode") == 15
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opcode = dns.gen("DNS", "opcode")
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assert opcode >= 0 and opcode <= 15
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assert dns.get("DNS", "opcode") == 15 # Original value unchanged
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dns.set("DNS", "opcode", 3)
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assert dns.get("DNS", "opcode") == 3
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dns = layers.packet.Packet(DNS(qr=0))
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assert dns.get("DNS", "qr") == 0
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qr = dns.gen("DNS", "qr")
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assert qr == 0 or qr == 1
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assert dns.get("DNS", "qr") == 0 # Original value unchanged
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dns.set("DNS", "qr", 1)
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assert dns.get("DNS", "qr") == 1
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dns = layers.packet.Packet(DNS(arcount=0xAABB))
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assert dns.get("DNS", "arcount") == 0xAABB
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arcount = dns.gen("DNS", "arcount")
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assert arcount >= 0 and arcount <= 0xffff
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assert dns.get("DNS", "arcount") == 0xAABB # Original value unchanged
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dns.set("DNS", "arcount", 65432)
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assert dns.get("DNS", "arcount") == 65432
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dns = layers.dns_layer.DNSLayer(DNS()/DNSQR(qname="example.com"))
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assert isinstance(dns.get_next_layer(), DNSQR)
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print(dns.gen("id"))
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assert dns.gen("id")
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p = layers.packet.Packet(DNS(id=0xabcd))
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p2 = layers.packet.Packet(DNS(bytes(p)))
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assert p.get("DNS", "id") == 0xabcd
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assert p2.get("DNS", "id") == 0xabcd
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def test_read_layers():
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"""
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Tests the ability to read each layer
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"""
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packet = IP() / UDP() / TCP() / DNS() / DNSQR(qname="example.com") / DNSQR(qname="example2.com") / DNSQR(qname="example3.com")
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packet_geneva = layers.packet.Packet(packet)
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packet_geneva.setup_layers()
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i = 0
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for layer in packet_geneva.read_layers():
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if i == 0:
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assert isinstance(layer, layers.ip_layer.IPLayer)
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elif i == 1:
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assert isinstance(layer, layers.udp_layer.UDPLayer)
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elif i == 2:
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assert isinstance(layer, layers.tcp_layer.TCPLayer)
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elif i == 3:
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assert isinstance(layer, layers.dns_layer.DNSLayer)
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elif i == 4:
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assert isinstance(layer, layers.dnsqr_layer.DNSQRLayer)
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assert layer.layer.qname == b"example.com"
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elif i == 5:
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assert isinstance(layer, layers.dnsqr_layer.DNSQRLayer)
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assert layer.layer.qname == b"example2.com"
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elif i == 6:
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assert isinstance(layer, layers.dnsqr_layer.DNSQRLayer)
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assert layer.layer.qname == b"example3.com"
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i += 1
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def test_multi_opts():
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"""
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Tests various option getting/setting.
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"""
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pkt = IP()/TCP(options=[('MSS', 1460), ('SAckOK', b''), ('Timestamp', (4154603075, 0)), ('NOP', None), ('WScale', 7), ('md5header', b'abcd' * 8)])
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packet = layers.packet.Packet(pkt)
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assert packet.get("TCP", "options-sackok") == ''
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assert packet.get("TCP", "options-mss") == 1460
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assert packet.get("TCP", "options-timestamp") == 4154603075
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assert packet.get("TCP", "options-wscale") == 7
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packet.set("TCP", "options-timestamp", 400000000)
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assert packet.get("TCP", "options-sackok") == ''
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assert packet.get("TCP", "options-mss") == 1460
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assert packet.get("TCP", "options-timestamp") == 400000000
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assert packet.get("TCP", "options-wscale") == 7
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pkt = IP()/TCP(options=[('SAckOK', b''), ('Timestamp', (4154603075, 0)), ('NOP', None), ('WScale', 7)])
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packet = layers.packet.Packet(pkt)
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# If the option isn't present, it will be returned as an empty string
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assert packet.get("TCP", "options-mss") == ''
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packet.set("TCP", "options-mss", "")
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assert packet.get("TCP", "options-mss") == 0
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def test_options_eol():
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"""
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Tests options-eol.
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"""
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pkt = TCP(options=[("EOL", None)])
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p = layers.packet.Packet(pkt)
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assert p.get("TCP", "options-eol") == ""
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p2 = layers.packet.Packet(TCP(bytes(p)))
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assert p2.get("TCP", "options-eol") == ""
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p = layers.packet.Packet(IP()/TCP(options=[]))
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assert p.get("TCP", "options-eol") == ""
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p.set("TCP", "options-eol", "")
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p.show()
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assert len(p["TCP"].options) == 1
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assert any(k == "EOL" for k, v in p["TCP"].options)
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value = p.gen("TCP", "options-eol")
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assert value == "", "eol cannot store data"
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p.set("TCP", "options-eol", value)
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p2 = TCP(bytes(p))
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assert any(k == "EOL" for k, v in p2["TCP"].options)
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def test_compression_fallback(logger):
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"""
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Test that compression does not touch a packet without DNS in it packet
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"""
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pkt = UDP()
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p = layers.packet.Packet(pkt)
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p2 = layers.dns_layer.DNSLayer.dns_decompress(p, logger)
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assert p2 == p, "dns_decompress changed a non DNS packet"
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def test_options_mss():
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"""
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Tests options-eol.
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"""
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pkt = TCP(options=[("MSS", 1440)])
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p = layers.packet.Packet(pkt)
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assert p.get("TCP", "options-mss") == 1440
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p2 = layers.packet.Packet(TCP(bytes(p)))
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assert p2.get("TCP", "options-mss") == 1440
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p = layers.packet.Packet(TCP(options=[]))
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assert p.get("TCP", "options-mss") == ""
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p.set("TCP", "options-mss", 2880)
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p.show()
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assert len(p["TCP"].options) == 1
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assert any(k == "MSS" for k, v in p["TCP"].options)
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value = p.gen("TCP", "options-mss")
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p.set("TCP", "options-mss", value)
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p2 = TCP(bytes(p))
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assert any(k == "MSS" for k, v in p2["TCP"].options)
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def check_get(protocol, field, value):
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"""
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Checks if the get method worked for this protocol, field, and value.
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"""
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pkt = protocol()
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setattr(pkt, field, value)
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packet = layers.packet.Packet(pkt)
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assert packet.get(protocol.__name__, field) == value
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def get_test_configs():
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"""
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Generates test configurations for the getters.
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"""
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return [
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(IP, 'version', 4),
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(IP, 'version', 6),
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(IP, 'version', 0),
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(IP, 'ihl', 0),
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(IP, 'tos', 0),
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(IP, 'len', 50),
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(IP, 'len', 6),
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(IP, 'flags', 'MF'),
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(IP, 'flags', 'DF'),
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(IP, 'flags', 'MF+DF'),
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(IP, 'ttl', 25),
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(IP, 'proto', 4),
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(IP, 'chksum', 0x4444),
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(IP, 'src', '127.0.0.1'),
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(IP, 'dst', '127.0.0.1'),
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(TCP, 'sport', 12345),
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(TCP, 'dport', 55555),
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(TCP, 'seq', 123123123),
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(TCP, 'ack', 181818181),
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(TCP, 'dataofs', 5),
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(TCP, 'dataofs', 0),
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(TCP, 'dataofs', 15),
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(TCP, 'reserved', 0),
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(TCP, 'window', 100),
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(TCP, 'chksum', 0x4444),
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(TCP, 'urgptr', 1),
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(DNS, 'id', 0xabcd),
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(DNS, 'qr', 1),
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(DNS, 'opcode', 9),
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(DNS, 'aa', 0),
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(DNS, 'tc', 1),
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(DNS, 'rd', 0),
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(DNS, 'ra', 1),
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(DNS, 'z', 0),
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(DNS, 'ad', 1),
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(DNS, 'cd', 0),
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(DNS, 'qdcount', 0x1234),
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(DNS, 'ancount', 12345),
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(DNS, 'nscount', 49870),
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(DNS, 'arcount', 0xABCD),
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(DNSQR, 'qname', 'example.com.'),
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(DNSQR, 'qtype', 1),
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(DNSQR, 'qclass', 0),
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]
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def get_custom_configs():
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"""
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Generates test configurations that can use the custom getters.
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"""
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return [
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(IP, 'flags', ''),
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(TCP, 'options-eol', ''),
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(TCP, 'options-nop', ''),
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(TCP, 'options-mss', 0),
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(TCP, 'options-mss', 1440),
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(TCP, 'options-mss', 5000),
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(TCP, 'options-wscale', 20),
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(TCP, 'options-sackok', ''),
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(TCP, 'options-sack', ''),
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(TCP, 'options-timestamp', 12345678),
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(TCP, 'options-altchksum', 0x44),
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(TCP, 'options-altchksumopt', ''),
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(TCP, 'options-uto', 1),
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#(TCP, 'options-md5header', 'deadc0ffee')
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]
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@pytest.mark.parametrize("config", get_test_configs(),
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ids=['%s-%s-%s' % (proto.__name__, field, str(val)) for proto, field, val in get_test_configs()])
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def test_get(config):
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"""
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Tests value retrieval.
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"""
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proto, field, val = config
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check_get(proto, field, val)
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def check_set_get(protocol, field, value):
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"""
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Checks if the get method worked for this protocol, field, and value.
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"""
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pkt = layers.packet.Packet(protocol())
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pkt.set(protocol.__name__, field, value)
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assert pkt.get(protocol.__name__, field) == value
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# Rebuild the packet to confirm the type survived
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pkt2 = layers.packet.Packet(protocol(bytes(pkt)))
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assert pkt2.get(protocol.__name__, field) == value, "Value %s for header %s didn't survive packet parsing." % (value, field)
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@pytest.mark.parametrize("config", get_test_configs() + get_custom_configs(),
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ids=['%s-%s-%s' % (proto.__name__, field, str(val)) for proto, field, val in get_test_configs() + get_custom_configs()])
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def test_set_get(config):
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"""
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Tests value retrieval.
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"""
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proto, field, value = config
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check_set_get(proto, field, value)
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def check_gen_set_get(protocol, field):
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"""
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Checks if the get method worked for this protocol, field, and value.
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"""
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pkt = layers.packet.Packet(protocol())
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new_value = pkt.gen(protocol.__name__, field)
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pkt.set(protocol.__name__, field, new_value)
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assert pkt.get(protocol.__name__, field) == new_value
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# Rebuild the packet to confirm the type survived
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pkt2 = layers.packet.Packet(protocol(bytes(pkt)))
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assert pkt2.get(protocol.__name__, field) == new_value
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@pytest.mark.parametrize("config", get_test_configs() + get_custom_configs(),
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ids=['%s-%s' % (proto.__name__, field) for proto, field, _ in get_test_configs() + get_custom_configs()])
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def test_gen_set_get(config):
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"""
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Tests value retrieval.
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"""
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# Test each generator 50 times to hit a range of values
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for i in range(0, 50):
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proto, field, _ = config
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check_gen_set_get(proto, field)
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def test_custom_get():
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"""
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Tests value retrieval for custom getters.
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"""
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pkt = IP()/TCP()/Raw(load="AAAA")
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tcp = layers.packet.Packet(pkt)
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assert tcp.get("TCP", "load") == "AAAA"
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def test_restrict_fields(logger):
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"""
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Tests packet field restriction.
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"""
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layers.packet.SUPPORTED_LAYERS = [
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layers.ip_layer.IPLayer,
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layers.tcp_layer.TCPLayer,
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layers.udp_layer.UDPLayer
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]
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tcpfields = layers.tcp_layer.TCPLayer.fields
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udpfields = layers.udp_layer.UDPLayer.fields
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ipfields = layers.ip_layer.IPLayer.fields
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layers.packet.Packet.restrict_fields(logger, ["TCP", "UDP"], [], [])
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assert len(layers.packet.SUPPORTED_LAYERS) == 2
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assert layers.tcp_layer.TCPLayer in layers.packet.SUPPORTED_LAYERS
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assert layers.udp_layer.UDPLayer in layers.packet.SUPPORTED_LAYERS
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assert not layers.ip_layer.IPLayer in layers.packet.SUPPORTED_LAYERS
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pkt = IP()/TCP()
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packet = layers.packet.Packet(pkt)
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assert "TCP" in packet.layers
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assert not "IP" in packet.layers
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assert len(packet.layers) == 1
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for i in range(0, 2000):
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layer, proto, field = layers.packet.Packet().gen_random()
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assert layer in [TCP, UDP]
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# Check we can't retrieve any IP fields
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for field in layers.ip_layer.IPLayer.fields:
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with pytest.raises(AssertionError):
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packet.get("IP", field)
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# Check we can get all the TCP fields
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for field in layers.tcp_layer.TCPLayer.fields:
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packet.get("TCP", field)
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|
|
layers.packet.Packet.restrict_fields(logger, ["TCP", "UDP"], ["flags"], [])
|
|
packet = layers.packet.Packet(pkt)
|
|
assert len(layers.packet.SUPPORTED_LAYERS) == 1
|
|
assert layers.tcp_layer.TCPLayer in layers.packet.SUPPORTED_LAYERS
|
|
assert not layers.udp_layer.UDPLayer in layers.packet.SUPPORTED_LAYERS
|
|
assert not layers.ip_layer.IPLayer in layers.packet.SUPPORTED_LAYERS
|
|
assert layers.tcp_layer.TCPLayer.fields == ["flags"]
|
|
assert not layers.udp_layer.UDPLayer.fields
|
|
|
|
# Check we can't retrieve any IP fields
|
|
for field in layers.ip_layer.IPLayer.fields:
|
|
with pytest.raises(AssertionError):
|
|
packet.get("IP", field)
|
|
|
|
# Check we can get all the TCP fields
|
|
for field in tcpfields:
|
|
if field == "flags":
|
|
packet.get("TCP", field)
|
|
else:
|
|
with pytest.raises(AssertionError):
|
|
packet.get("TCP", field)
|
|
|
|
for i in range(0, 2000):
|
|
layer, field, value = layers.packet.Packet().gen_random()
|
|
assert layer == TCP
|
|
assert field == "flags"
|
|
|
|
_, proto, field, value, _ = actions.trigger.Trigger.get_rand_trigger(None, 0)
|
|
assert proto == 'TCP'
|
|
assert field == "flags"
|
|
layers.packet.Packet.reset_restrictions()
|
|
layers.packet.SUPPORTED_LAYERS = [
|
|
layers.ip_layer.IPLayer,
|
|
layers.tcp_layer.TCPLayer,
|
|
layers.udp_layer.UDPLayer
|
|
]
|
|
|
|
with pytest.raises(AssertionError):
|
|
layers.packet.Packet.restrict_fields(logger, ["TCP", "IP"], ["notathing"], ["notathing"])
|
|
layers.packet.Packet.reset_restrictions()
|
|
|
|
layers.packet.Packet.restrict_fields(logger, ["TCP", "IP"], [], ["sport", "dport", "seq", "src"])
|
|
packet = layers.packet.Packet(pkt)
|
|
packet = packet.copy()
|
|
assert packet.has_supported_layers()
|
|
assert len(layers.packet.SUPPORTED_LAYERS) == 2
|
|
assert layers.tcp_layer.TCPLayer in layers.packet.SUPPORTED_LAYERS
|
|
assert not layers.udp_layer.UDPLayer in layers.packet.SUPPORTED_LAYERS
|
|
assert layers.ip_layer.IPLayer in layers.packet.SUPPORTED_LAYERS
|
|
assert set(layers.tcp_layer.TCPLayer.fields) == set([f for f in tcpfields if f not in ["sport", "dport", "seq"]])
|
|
assert set(layers.ip_layer.IPLayer.fields) == set([f for f in ipfields if f not in ["src"]])
|
|
|
|
# Check we can't retrieve any IP fields
|
|
for field in layers.ip_layer.IPLayer.fields:
|
|
if field == "src":
|
|
with pytest.raises(AssertionError):
|
|
packet.get("IP", field)
|
|
else:
|
|
packet.get("IP", field)
|
|
|
|
# Check we can get all the TCP fields
|
|
for field in tcpfields:
|
|
if field in ["sport", "dport", "seq"]:
|
|
with pytest.raises(AssertionError):
|
|
packet.get("TCP", field)
|
|
else:
|
|
packet.get("TCP", field)
|
|
|
|
for i in range(0, 2000):
|
|
layer, field, value = layers.packet.Packet().gen_random()
|
|
assert layer in [TCP, IP]
|
|
assert field not in ["sport", "dport", "seq", "src"]
|
|
|
|
_, proto, field, value, _ = actions.trigger.Trigger.get_rand_trigger(None, 0)
|
|
assert proto in ['TCP', 'IP']
|
|
assert field not in ["sport", "dport", "seq", "src"]
|
|
|
|
layers.packet.Packet.reset_restrictions()
|
|
layers.packet.SUPPORTED_LAYERS = [
|
|
layers.ip_layer.IPLayer,
|
|
layers.tcp_layer.TCPLayer,
|
|
layers.udp_layer.UDPLayer
|
|
]
|
|
|
|
evolve.restrict_headers(logger, "ip,udp,dns", "", "version")
|
|
packet = layers.packet.Packet(pkt)
|
|
proto, field, value = packet.get_random()
|
|
assert proto.__name__ in ["IP", "UDP"]
|
|
assert len(layers.packet.SUPPORTED_LAYERS) == 2
|
|
assert not layers.tcp_layer.TCPLayer in layers.packet.SUPPORTED_LAYERS
|
|
assert layers.udp_layer.UDPLayer in layers.packet.SUPPORTED_LAYERS
|
|
assert layers.ip_layer.IPLayer in layers.packet.SUPPORTED_LAYERS
|
|
assert set(layers.ip_layer.IPLayer.fields) == set([f for f in ipfields if f not in ["version"]])
|
|
assert set(layers.udp_layer.UDPLayer.fields) == set(udpfields)
|
|
|
|
layers.packet.Packet.reset_restrictions()
|
|
for layer in layers.packet.SUPPORTED_LAYERS:
|
|
assert layer.fields, '%s has no fields - reset failed!' % str(layer)
|