def nmap_sig(target, oport=80, cport=81, ucport=1):
res = {}
tcpopt = [("WScale", 10),
("NOP", None),
("MSS", 256),
("Timestamp", (123, 0))]
tests = [
IP(dst=target, id=1) /
TCP(seq=1, sport=5001 + i, dport=oport if i < 4 else cport,
options=tcpopt, flags=flags)
for i, flags in enumerate(["CS", "", "SFUP", "A", "S", "A", "FPU"])
]
tests.append(IP(dst=target) / UDP(sport=5008, dport=ucport) / (300 * "i"))
ans, unans = sr(tests, timeout=2)
ans.extend((x, None) for x in unans)
for snd, rcv in ans:
if snd.sport == 5008:
res["PU"] = (snd, rcv)
else:
test = "T%i" % (snd.sport - 5000)
if rcv is not None and ICMP in rcv:
warning("Test %s answered by an ICMP", test)
rcv = None
res[test] = rcv
return nmap_probes2sig(res)
def nmap_sig(target, oport=80, cport=81, ucport=1):
res = {}
tcpopt = [ ("WScale", 10),
("NOP",None),
("MSS", 256),
("Timestamp",(123,0)) ]
tests = [ IP(dst=target, id=1)/TCP(seq=1, sport=5001, dport=oport, options=tcpopt, flags="CS"),
IP(dst=target, id=1)/TCP(seq=1, sport=5002, dport=oport, options=tcpopt, flags=0),
IP(dst=target, id=1)/TCP(seq=1, sport=5003, dport=oport, options=tcpopt, flags="SFUP"),
IP(dst=target, id=1)/TCP(seq=1, sport=5004, dport=oport, options=tcpopt, flags="A"),
IP(dst=target, id=1)/TCP(seq=1, sport=5005, dport=cport, options=tcpopt, flags="S"),
IP(dst=target, id=1)/TCP(seq=1, sport=5006, dport=cport, options=tcpopt, flags="A"),
IP(dst=target, id=1)/TCP(seq=1, sport=5007, dport=cport, options=tcpopt, flags="FPU"),
IP(str(IP(dst=target)/UDP(sport=5008,dport=ucport)/(300*"i"))) ]
ans, unans = sr(tests, timeout=2)
ans += map(lambda x: (x,None), unans)
for S,T in ans:
if S.sport == 5008:
res["PU"] = nmap_udppacket_sig(S,T)
else:
t = "T%i" % (S.sport-5000)
if T is not None and T.haslayer(ICMP):
warning("Test %s answered by an ICMP" % t)
T=None
res[t] = nmap_tcppacket_sig(T)
return res
def ikescan(ip):
return sr(
IP(dst=ip)
/ UDP()
/ ISAKMP(init_cookie=RandString(8), exch_type=2)
/ ISAKMP_payload_SA(prop=ISAKMP_payload_Proposal())
)
def ikev2scan(ip):
return sr(
IP(dst=ip)
/ UDP()
/ IKEv2(init_SPI=RandString(8), exch_type=34)
/ IKEv2_payload_SA(prop=IKEv2_payload_Proposal())
)
def ikescan(ip):
"""Sends/receives a ISAMPK payload SA with payload proposal"""
pkt = IP(dst=ip)
pkt /= UDP()
pkt /= ISAKMP(init_cookie=RandString(8), exch_type=2)
pkt /= ISAKMP_payload_SA(prop=ISAKMP_payload_Proposal())
return sr(pkt)
def traceroute(target, dport=80, minttl=1, maxttl=30, sport=RandShort(), l4 = None, filter=None, timeout=2, verbose=None, **kargs):
"""Instant TCP traceroute
traceroute(target, [maxttl=30,] [dport=80,] [sport=80,] [verbose=conf.verb]) -> None
"""
if verbose is None:
verbose = conf.verb
if filter is None:
# we only consider ICMP error packets and TCP packets with at
# least the ACK flag set *and* either the SYN or the RST flag
# set
filter="(icmp and (icmp[0]=3 or icmp[0]=4 or icmp[0]=5 or icmp[0]=11 or icmp[0]=12)) or (tcp and (tcp[13] & 0x16 > 0x10))"
if l4 is None:
a,b = sr(IP(dst=target, id=RandShort(), ttl=(minttl,maxttl))/TCP(seq=RandInt(),sport=sport, dport=dport),
timeout=timeout, filter=filter, verbose=verbose, **kargs)
else:
# this should always work
filter="ip"
a,b = sr(IP(dst=target, id=RandShort(), ttl=(minttl,maxttl))/l4,
timeout=timeout, filter=filter, verbose=verbose, **kargs)
a = TracerouteResult(a.res)
if verbose:
a.show()
return a,b
def report_ports(target, ports):
"""portscan a target and output a LaTeX table
report_ports(target, ports) -> string"""
ans,unans = sr(IP(dst=target)/TCP(dport=ports),timeout=5)
rep = "\\begin{tabular}{|r|l|l|}\n\\hline\n"
for s,r in ans:
if not r.haslayer(ICMP):
if r.payload.flags == 0x12:
rep += r.sprintf("%TCP.sport% & open & SA \\\\\n")
rep += "\\hline\n"
for s,r in ans:
if r.haslayer(ICMP):
rep += r.sprintf("%TCPerror.dport% & closed & ICMP type %ICMP.type%/%ICMP.code% from %IP.src% \\\\\n")
elif r.payload.flags != 0x12:
rep += r.sprintf("%TCP.sport% & closed & TCP %TCP.flags% \\\\\n")
rep += "\\hline\n"
for i in unans:
rep += i.sprintf("%TCP.dport% & ? & unanswered \\\\\n")
rep += "\\hline\n\\end{tabular}\n"
return rep
def queso_sig(target, dport=80, timeout=3):
p = queso_kdb.get_base()
ret = []
for flags in ["S", "SA", "F", "FA", "SF", "P", "SEC"]:
ans, unans = sr(IP(dst=target)/TCP(dport=dport,flags=flags,seq=RandInt()),
timeout=timeout, verbose=0)
if len(ans) == 0:
rs = "- - - -"
else:
s,r = ans[0]
rs = "%i" % (r.seq != 0)
if not r.ack:
r += " 0"
elif r.ack-s.seq > 666:
rs += " R" % 0
else:
rs += " +%i" % (r.ack-s.seq)
rs += " %X" % r.window
rs += " %x" % r.payload.flags
ret.append(rs)
return ret
def send_wait_for_message(step, exp_message):
"""
Block until the given message is (not) received.
Parameter:
new: (' new', optional): Only check the output printed since last time
this step was used for this process.
process_name ('<name> stderr'): Name of the process to check the output of.
message ('message <message>'): Output (part) to wait for.
"""
world.cliopts = [] #clear options, always build new message, also possible make it in client_send_msg
#debug.recv = []
conf.use_pcap = True
# Uncomment this to get debug.recv filled with all received messages
#conf.debug_match = True
ans,unans = sr(world.climsg, iface=world.cfg["iface"], timeout=1, nofilter=1, verbose=99)
expected_type_found = False
received_names = ""
world.srvmsg = []
for x in ans:
a,b = x
world.srvmsg.append(b)
print("Debug: Received packet type = %s" % get_msg_type(b))
received_names = get_msg_type(b) + " " + received_names
if (get_msg_type(b) == exp_message):
expected_type_found = True
for x in unans:
print("Unmatched packet type = %s" % get_msg_type(x))
print("Received traffic (answered/unanswered): %d/%d packet(s)." % (len(ans), len(unans)))
assert len(world.srvmsg) != 0, "No response received."
assert expected_type_found, "Expected message " + exp_message + " not received (got " + received_names + ")"
def send_wait_for_message(condition_type, presence, exp_message):
"""
Block until the given message is (not) received.
Parameter:
new: (' new', optional): Only check the output printed since last time
this step was used for this process.
process_name ('<name> stderr'): Name of the process to check the output of.
message ('message <message>'): Output (part) to wait for.
"""
world.cliopts = [
] # clear options, always build new message, also possible make it in client_send_msg
may_flag = False
#debug.recv=[]
if str(condition_type) in "MUST":
pass
elif str(condition_type) in "MAY":
may_flag = True
# we needs to get it operational
# problem: break test with success. (for now we can break test only with fail)
else:
assert False, "Invalid expected behavior: %s." % str(condition_type)
# Uncomment this to get debug.recv filled with all received messages
conf.debug_match = True
# checkIPsrc must be False so scapy can correctly match response to request
conf.checkIPsrc = False
apply_message_fields_changes()
timeout = world.cfg["wait_interval"]
if "HA" in os.environ.get('PYTEST_CURRENT_TEST').split("/"):
timeout *= world.f_cfg.ha_packet_wait_interval_factor
ans, unans = sr(world.climsg,
iface=world.cfg["iface"],
timeout=timeout,
nofilter=1,
verbose=world.scapy_verbose)
if world.f_cfg.show_packets_from in ['both', 'client']:
world.climsg[0].show()
expected_type_found = False
received_names = ""
world.srvmsg = []
for x in ans:
a, b = x
world.srvmsg.append(b)
if world.f_cfg.show_packets_from in ['both', 'server']:
b.show()
if not world.loops["active"]:
log.info("Received packet type=%s" % get_msg_type(b))
received_names = get_msg_type(b) + " " + received_names
if get_msg_type(b) == exp_message:
expected_type_found = True
if exp_message is not None:
for x in unans:
log.error(("Unanswered packet type=%s" %
dhcp6.dhcp6_cls_by_type[x.msgtype]))
if not world.loops["active"]:
log.debug("Received traffic (answered/unanswered): %d/%d packet(s)." %
(len(ans), len(unans)))
if may_flag:
if len(world.srvmsg) != 0:
assert True, "Response received."
if len(world.srvmsg) == 0:
assert True, "Response not received." # stop the test... ??
elif presence:
assert len(world.srvmsg) != 0, "No response received."
assert expected_type_found, "Expected message " + exp_message + " not received (got " + received_names + ")"
elif not presence:
assert len(world.srvmsg) == 0, "Response received, not expected"
return world.srvmsg
#print ("In UDP Flag")
if (hostType == "singleHost"):
#Add Table Headers to HTML
htmlText = htmlText + "<h2>UDP Scan: " + str(
hostIP
) + "<table><tr> <th>Host</th> <th>Port</th> <th>Status</th> </tr>"
#build and send UDP packets for single host, multiple ports
try:
for port in ports:
ip = IP(dst=host)
udp = UDP(dport=int(port), sport=123)
packet = ip / udp
response = sr(packet, verbose=False, timeout=20)
try:
check = response[0][ICMP][0][1][ICMP]
print("Port {} on {} is closed".format(port, host))
#Add host, port, and status to HTML
htmlText = htmlText + "<tr> <td>" + hostIP + "</td> <td>" + str(
port) + "</td> <td>Closed</td> </tr>"
except IndexError:
print("Port {} on {} is open|filtered".format(
port, host))
#Add host, port, and status to HTML
htmlText = htmlText + "<tr> <td>" + hostIP + "</td> <td>" + str(
port) + "</td> <td>open|filtered</td> </tr>"
def send_wait_for_message(condition_type, presence, exp_message):
"""
Block until the given message is (not) received.
Parameter:
new: (' new', optional): Only check the output printed since last time
this step was used for this process.
process_name ('<name> stderr'): Name of the process to check the output of.
message ('message <message>'): Output (part) to wait for.
"""
world.cliopts = [] # clear options, always build new message, also possible make it in client_send_msg
may_flag = False
#debug.recv=[]
if str(condition_type) in "MUST":
pass
elif str(condition_type) in "MAY":
may_flag = True
# we needs to get it operational
# problem: break test with success. (for now we can break test only with fail)
else:
assert False, "Invalid expected behavior: %s." % str(condition_type)
# Uncomment this to get debug.recv filled with all received messages
conf.debug_match = True
# checkIPsrc must be False so scapy can correctly match response to request
conf.checkIPsrc = False
apply_message_fields_changes()
ans, unans = sr(world.climsg,
iface=world.cfg["iface"],
timeout=world.cfg["wait_interval"],
nofilter=1,
verbose=world.scapy_verbose)
if world.f_cfg.show_packets_from in ['both', 'client']:
world.climsg[0].show()
expected_type_found = False
received_names = ""
world.srvmsg = []
for x in ans:
a, b = x
world.srvmsg.append(b)
if world.f_cfg.show_packets_from in ['both', 'server']:
b.show()
if not world.loops["active"]:
log.info("Received packet type=%s" % get_msg_type(b))
received_names = get_msg_type(b) + " " + received_names
if get_msg_type(b) == exp_message:
expected_type_found = True
for x in unans:
log.error(("Unanswered packet type=%s" % dhcp6.dhcp6_cls_by_type[x.msgtype]))
if not world.loops["active"]:
log.debug("Received traffic (answered/unanswered): %d/%d packet(s)." % (len(ans), len(unans)))
if may_flag:
if len(world.srvmsg) != 0:
assert True, "Response received."
if len(world.srvmsg) == 0:
assert True, "Response not received." # stop the test... ??
elif presence:
assert len(world.srvmsg) != 0, "No response received."
assert expected_type_found, "Expected message " + exp_message + " not received (got " + received_names + ")"
elif not presence:
assert len(world.srvmsg) == 0, "Response received, not expected"
return world.srvmsg
def ikev2scan(ip):
return sr(
IP(dst=ip) / UDP() / IKEv2(init_SPI=RandString(8), exch_type=34) /
IKEv2_payload_SA(prop=IKEv2_payload_Proposal()))
def ping(dst, **kwargs):
"""Function to execute a ping test.
Args:
dst (str): The destination address to ping. Can be either a FQDN or an IP
address.
**count (int): Keyword argument to optionally specify the number of ping packets
to send in a single test. Defaults to 10. Max value of 20.
**payload_size (int): Keyword argument to optionally specify the ICMP packet's payload size.
Defaults to 56. Max value of 1472.
Returns:
dict: Returns a dictionary object with test results.
"""
rtt = []
comment = None
count = kwargs.get("count", 10)
if isinstance(count, str) and not count.isdigit():
raise TypeError(f"Provided 'count' of '{count}' must be an integer.")
count = abs(int(count))
if not 1 <= count <= 20:
comment = f"Provided count of '{count}' is not allowed. Defaulting to 10. Min: 1, Max: 20."
count = 10
payload_size = kwargs.get("payload_size", constants.PACKET_PAYLOAD_SIZE)
if isinstance(payload_size, str) and not payload_size.isdigit():
raise TypeError(
f"Provided 'payload_size' of '{payload_size}' must be an integer.")
payload_size = abs(int(payload_size))
if not 0 <= payload_size <= 1472:
raise ValueError(
f"Provided 'packet_size' of '{payload_size}' is not allowed. Min: 0, Max: 1472."
)
result = {
"dst": dst,
"sent": count,
"recv": None,
"payload_size": payload_size,
"packet_size": payload_size + 28,
"loss": None,
"rtt": {
"min": None,
"max": None,
"avg": None
},
"replies": [],
"comment": comment,
"failed": True,
}
dst = _resolve(dst)
# Get the correct egress interface name for the provided destination. This is to solve
# issues with testing via a VPN.
iface = _get_route_dev(dst)
# Tell Scapy to NOT ignore the inner packet source. This is to avoid issues with NAT.
conf.checkIPsrc = False
# After much testing within our network I found that if we don't limit the number of
# packets that Scapy receives in a single sniff it will essentially clog up and never
# return from its receive loop. Adding a custom BPF filter stops this from occurring.
packet_filter = f"(src host {dst} or dst host {dst}) and icmp"
for seq in range(0, count):
packet = ICMP(id=os.getpid(), seq=seq) / Raw(
RandString(size=payload_size))
ans = sr(
IP(dst=dst, id=os.getpid()) / packet,
iface=iface,
filter=packet_filter,
timeout=constants.PACKET_RECV_TIMEOUT,
retry=constants.PACKET_SEND_RETRY,
verbose=0,
)[0]
# Check if we got an echo-reply.
if ans and ans[0][1][1].code == 0:
rtt_ms = (ans[0][1].time - ans[0][0].sent_time) * 1000.0
rtt.append(rtt_ms)
result["replies"].append({
"seq": ans[0][1].seq,
"ttl": ans[0][1].ttl,
"len":
ans[0][1].len - 20, # Bytes received minus the IP header.
"rtt_ms": rtt_ms,
})
time.sleep(constants.PACKET_SEND_DELAY)
# Calculate packet loss.
result["loss"] = abs((100 * (len(rtt) - count) / count))
# Set RTT timings if packets were received.
if rtt:
result["rtt"]["min"] = format(min(rtt), ".3f")
result["rtt"]["max"] = format(max(rtt), ".3f")
result["rtt"]["avg"] = format(sum(rtt) / len(rtt), ".3f")
result["failed"] = False
return result
# copyright: Copyright (c) 2017-2020 qa_tech Co., Ltd. All rights reserved.
# author: Jia Huang
# create_time: 2020/7/15 15:42
# update_time: 2020/7/15 15:42
# description: function description
"""
scapy发送数据包有常用的如下几种方法：
send(pkt) 发送三层数据包，但不会受到返回的结果。
sr(pkt) 发送三层数据包，返回两个结果，分别是接收到响应的数据包和未收到响应的数据包。
sr1(pkt) 发送三层数据包，仅仅返回接收到响应的数据包。
sendp(pkt) 发送二层数据包。
srp(pkt) 发送二层数据包，并等待响应。
srp1(pkt) 发送第二层数据包，并返回响应的数据包
"""
from scapy.layers.inet import IP, TCP
from scapy.sendrecv import sr
# sr发送一个数据包，ans为响应的数据包，u_ans为未响应的数据包
pkt = IP(dst='114.114.114.114') / TCP(dport='http')
ans, u_ans = sr(pkt, timeout=1)
print(ans)
print(u_ans)
# 数据包来实现一个简单的SYN端口扫描，flags="S" 表示发送SYN数据包
port_scan = IP(dst='192.168.1.180') / TCP(dport=[22, 3389, 3306, 443, 445],
flags='S')
ans, u_ans = sr(port_scan, timeout=1)
ans.summary()
def ikev2scan(ip, **kwargs):
"""Send a IKEv2 SA to an IP and wait for answers."""
return sr(
IP(dst=ip) / UDP() / IKEv2(init_SPI=RandString(8), exch_type=34) /
IKEv2_payload_SA(prop=IKEv2_payload_Proposal()),
**kwargs) # noqa: E501
elif args.level == 'med':
level = 100
elif args.level == 'low':
level = 500
elif args.level == 'insane':
level = 1000
print('scanning the crap out of {}...'.format(sys.argv[1]))
for port in range(1,level):
if args.icmp:
# icmp scan
network_layer = IP(dst=args.host)
sr(network_layer/ICMP(), retry=0, timeout=0.001, verbose=False)
print('icmp packet sent to host: counter {}'.format(port))
if args.syn:
# synscan
network_layer = IP(dst=args.host)
transport_layer = TCP(dport=port, flags="S")
send(network_layer/transport_layer, verbose=False)
print('syn packet sent to port {}'.format(port))
if args.udp:
# udp scan
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.settimeout(.01)
sock.sendto(bytes('rainbows', "utf-8"), (args.host, port))
print('udp packet sent to port {}'.format(port))
packet_tos = IP(dst=list_of_network_addresses[j]) / TCP(dport=22)
packet_len = IP(dst=list_of_network_addresses[j]) / TCP(dport=22)
packet_id = IP(dst=list_of_network_addresses[j]) / TCP(dport=22)
packet_frag = IP(dst=list_of_network_addresses[j]) / TCP(dport=22)
packet_ttl = IP(dst=list_of_network_addresses[j]) / TCP(dport=22)
packet_proto = IP(dst=list_of_network_addresses[j]) / TCP(dport=22)
packet_ihl.ihl = 18
packet_tos.tos = 18
packet_len.len = 18
packet_id.id = 18
packet_frag.frag = 18
packet_ttl.ttl = 18
packet_proto.proto = 18
answer_ihl = sr(packet_ihl, timeout=4)
answer_tos = sr(packet_tos, timeout=4)
answer_len = sr(packet_len, timeout=4)
answer_id = sr(packet_id, timeout=4)
answer_frag = sr(packet_frag, timeout=4)
answer_ttl = sr(packet_ttl, timeout=4)
answer_proto = sr(packet_proto, timeout=4)
if len(answer_ihl[0]) != 0:
if len(
nx.dijkstra_path(graph_ihl, list_of_network_addresses[0],
list_of_network_addresses[j])) == 2:
graph_ihl.add_edge(str(list_of_network_addresses[0]),
str(list_of_network_addresses[j]),
color='r',
weight=6)
def sendAndReceiveEthernetFrame(scapyFrame):
return sr(scapyFrame, iface=managementServerNICName)
packet_tc = IPv6(dst=ipv6_addr) / TCP(dport=22)
packet_fl = IPv6(dst=ipv6_addr) / TCP(dport=22)
packet_plen = IPv6(dst=ipv6_addr) / TCP(dport=22)
packet_nh = IPv6(dst=ipv6_addr) / TCP(dport=22)
packet_hlim = IPv6(dst=ipv6_addr) / TCP(dport=22)
packet_src = IPv6(dst=ipv6_addr) / TCP(dport=22)
packet_tc.tc = 18
packet_fl.fl = 18
packet_plen.plen = 18
packet_nh.nh = 18
packet_hlim.hlim = 18
packet_src.src = 18
answer_tc = sr(packet_tc, timeout=4)
answer_fl = sr(packet_fl, timeout=4)
answer_plen = sr(packet_plen, timeout=4)
answer_nh = sr(packet_nh, timeout=4)
answer_hlim = sr(packet_hlim, timeout=4)
answer_src = sr(packet_src, timeout=4)
if len(answer_tc[0]) != 0 and not hasattr(answer_tc[0][0][1], 'type'):
result_json["tc"] = "True"
else:
result_json["tc"] = "False"
if len(answer_fl[0]) != 0 and not hasattr(answer_fl[0][0][1], 'type'):
result_json["fl"] = "True"
else:
result_json["fl"] = "False"
# -*- coding: utf-8 -*-
# copyright: Copyright (c) 2017-2020 qa_tech Co., Ltd. All rights reserved.
# author: Jia Huang
# create_time: 2020/7/16 11:18
# update_time: 2020/7/16 11:18
# description: function description
from scapy.layers.inet import IP, TCP
from scapy.sendrecv import sr
from scapy.volatile import RandShort
# tracert 114.114.114.114 windows每次发起3个icmp
ans, u_ans = sr(IP(dst='114.114.114.114', ttl=(1, 20), id=RandShort()) /
TCP(flags=0x2),
timeout=3)
for snd, rcv in ans:
print(snd.ttl, rcv.src, isinstance(rcv.payload, TCP))
# 1 192.168.0.1 False ttl=1时，到第一个路由时，Time-to-live exceeded返回icmp
# 2 192.168.1.1 False ttl=2时，到第二个路由时，Time-to-live exceeded返回icmp
# 3 124.90.33.213 False
# 4 123.157.192.1 False
# 5 101.71.244.93 False
# 6 219.158.12.133 False
# 7 60.217.44.158 False
# 8 114.114.114.114 True
# 9 114.114.114.114 True
# 10 114.114.114.114 True
def ikescan(ip):
return sr(
IP(dst=ip) / UDP() / ISAKMP(init_cookie=RandString(8), exch_type=2) /
ISAKMP_payload_SA(prop=ISAKMP_payload_Proposal()))
def ikev2scan(ip, **kwargs):
"""Send a IKEv2 SA to an IP and wait for answers."""
return sr(IP(dst=ip)/UDP()/IKEv2(init_SPI=RandString(8),
exch_type=34)/IKEv2_payload_SA(prop=IKEv2_payload_Proposal()), **kwargs)
def traceroute(dst, **kwargs):
"""Function to execute a traceroute.
Args:
dst (type): The destination address to trace to. Can be either a FQDN or an
IP address.
**proto (str) : Keyword argument to optionally specify the transport protocol to
use in the traceroute. Defaults to ICMP.
**dport (int) : Keyword argument to optionally specify the destination port.
Defaults to 80 if `proto` is TCP, and None if ICMP.
**payload_size (int) : Keyword argument to optionally specify the ICMP/TCP packet's payload
size. Defaults to 56. Max value of 1472.
**max_ttl (int) : Keyword argument to optionally specify the max time-to-live
(max number of hops). Defaults to 32. Max value of 32.
Returns:
dict: Returns a dictionary object with test results.
"""
comment = None
asn_mmdb_reader = geoip2.database.Reader("mmdb/GeoLite2-ASN.mmdb")
proto = kwargs.get("proto", "ICMP").upper()
if proto not in ("ICMP", "TCP"):
comment = (
f"Provided 'proto' of '{proto}' is not supported. Defaulting to ICMP. ('ICMP', 'TCP')."
)
proto = "ICMP"
dport = kwargs.get("dport", 80)
if isinstance(dport, str) and not dport.isdigit():
raise TypeError(f"Provided 'dport' of '{dport}' must be an integer.")
dport = abs(int(dport))
if not 0 <= dport <= 65535:
raise ValueError(
f"Provided 'dport' of '{dport}' is not allowed. Min: 0, Max: 65535."
)
payload_size = kwargs.get("payload_size", constants.PACKET_PAYLOAD_SIZE)
if isinstance(payload_size, str) and not payload_size.isdigit():
raise TypeError(
f"Provided 'payload_size' of '{payload_size}' must be an integer.")
payload_size = abs(int(payload_size))
# ICMP has a maximum payload size of 1472 bytes which is significantly less than TCP's
# supported maximum of 65535 bytes, but since we need to support both and I do not want
# to exceed any MTUs; I'll leave 1472 as max.
if not 0 <= payload_size <= 1472:
raise ValueError(
f"Provided 'packet_size' of '{payload_size}' is not allowed. Min: 0, Max: 1472."
)
max_ttl = kwargs.get("max_ttl", constants.TRACE_MAX_TTL)
if isinstance(max_ttl, str) and not max_ttl.isdigit():
raise TypeError(
f"Provided 'max_ttl' of '{max_ttl}' must be an integer.")
max_ttl = abs(int(max_ttl))
if not 0 <= max_ttl <= 32:
raise ValueError(f"Provided 'max_ttl' of '{max_ttl}' is not allowed. "
f"Min: 0, Max: {constants.TRACE_MAX_TTL}.")
result = {
"dst": dst,
"proto": proto,
"dport": dport,
"payload_size": payload_size,
"packet_size": payload_size + {
"ICMP": 28,
"TCP": 40
}[proto],
"trace": [],
"comment": comment,
"failed": True,
}
dst = _resolve(dst)
# Get the correct egress interface name for the provided destination. This is to solve
# issues with testing via a VPN.
iface = _get_route_dev(dst)
packet = (TCP(dport=dport, flags="S") if proto == "TCP" else ICMP()) / Raw(
RandString(size=payload_size))
# Tell Scapy to NOT ignore the inner packet source. This is to avoid issues with NAT.
conf.checkIPsrc = False
for ttl in range(constants.TRACE_MIN_TTL, max_ttl + 1):
hop_data = {
"asn": None,
"ttl": ttl,
"src": None,
"hostname": None,
"rtt_ms": None,
"no_response": True,
}
ans = sr(
IP(dst=dst, ttl=ttl, flags="DF", id=RandShort()) / packet,
iface=iface,
nofilter=0,
timeout=constants.PACKET_RECV_TIMEOUT,
retry=constants.PACKET_SEND_RETRY,
verbose=0,
)[0]
if ans and ans[0][1].src not in [
hop["src"] for hop in result["trace"]
]:
try:
hop_data["asn"] = asn_mmdb_reader.asn(
ans[0][1].src).autonomous_system_number
except geoip2.errors.AddressNotFoundError:
pass
hop_data["src"] = ans[0][1].src
hop_data["hostname"] = _resolve(ans[0][1].src, reverse=True)
hop_data["rtt_ms"] = (ans[0][1].time - ans[0][0].sent_time) * 1000
hop_data["no_response"] = False
result["trace"].append(hop_data)
if ans[0][1].src == dst:
result["failed"] = False
break
else:
result["trace"].append(hop_data)
return result
