Coverage for /root/GitHubProjects/impacket/impacket/IP6.py : 74%

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1# Impacket - Collection of Python classes for working with network protocols.
2#
3# SECUREAUTH LABS. Copyright (C) 2021 SecureAuth Corporation. All rights reserved.
4#
5# This software is provided under a slightly modified version
6# of the Apache Software License. See the accompanying LICENSE file
7# for more information.
8#
10import struct
11import array
13from impacket.ImpactPacket import Header, array_frombytes
14from impacket.IP6_Address import IP6_Address
15from impacket.IP6_Extension_Headers import IP6_Extension_Header
17from impacket import LOG
20class IP6(Header):
21 #Ethertype value for IPv6
22 ethertype = 0x86DD
23 HEADER_SIZE = 40
24 IP_PROTOCOL_VERSION = 6
26 def __init__(self, buffer = None):
27 Header.__init__(self, IP6.HEADER_SIZE)
28 self.set_ip_v(IP6.IP_PROTOCOL_VERSION)
29 if (buffer):
30 self.load_header(buffer)
32 def contains(self, aHeader):
33 Header.contains(self, aHeader)
34 if isinstance(aHeader, IP6_Extension_Header):
35 self.set_next_header(aHeader.get_header_type())
37 def get_header_size(self):
38 return IP6.HEADER_SIZE
40 def __str__(self):
41 protocol_version = self.get_ip_v()
42 traffic_class = self.get_traffic_class()
43 flow_label = self.get_flow_label()
44 payload_length = self.get_payload_length()
45 next_header = self.get_next_header()
46 hop_limit = self.get_hop_limit()
47 source_address = self.get_ip_src()
48 destination_address = self.get_ip_dst()
50 s = "Protocol version: " + str(protocol_version) + "\n"
51 s += "Traffic class: " + str(traffic_class) + "\n"
52 s += "Flow label: " + str(flow_label) + "\n"
53 s += "Payload length: " + str(payload_length) + "\n"
54 s += "Next header: " + str(next_header) + "\n"
55 s += "Hop limit: " + str(hop_limit) + "\n"
56 s += "Source address: " + source_address.as_string() + "\n"
57 s += "Destination address: " + destination_address.as_string() + "\n"
58 return s
60 def get_pseudo_header(self):
61 source_address = self.get_ip_src().as_bytes()
62 #FIXME - Handle Routing header special case
63 destination_address = self.get_ip_dst().as_bytes()
64 reserved_bytes = [ 0x00, 0x00, 0x00 ]
66 upper_layer_packet_length = self.get_payload_length()
67 upper_layer_protocol_number = self.get_next_header()
69 next_header = self.child()
70 while isinstance(next_header, IP6_Extension_Header): 70 ↛ 73line 70 didn't jump to line 73, because the condition on line 70 was never true
71 # The length used in the pseudo-header is the Payload Length from the IPv6 header, minus
72 # the length of any extension headers present between the IPv6 header and the upper-layer header
73 upper_layer_packet_length -= next_header.get_header_size()
75 # If there are extension headers, fetch the correct upper-player protocol number by traversing the list
76 upper_layer_protocol_number = next_header.get_next_header()
78 next_header = next_header.child()
80 pseudo_header = array.array('B')
81 pseudo_header.extend(source_address)
82 pseudo_header.extend(destination_address)
83 array_frombytes(pseudo_header, struct.pack('!L', upper_layer_packet_length))
84 pseudo_header.fromlist(reserved_bytes)
85 array_frombytes(pseudo_header, struct.pack('B', upper_layer_protocol_number))
86 return pseudo_header
88############################################################################
89 def get_ip_v(self):
90 return (self.get_byte(0) & 0xF0) >> 4
92 def get_traffic_class(self):
93 return ((self.get_byte(0) & 0x0F) << 4) | ((self.get_byte(1) & 0xF0) >> 4)
95 def get_flow_label(self):
96 return (self.get_byte(1) & 0x0F) << 16 | (self.get_byte(2) << 8) | self.get_byte(3)
98 def get_payload_length(self):
99 return (self.get_byte(4) << 8) | self.get_byte(5)
101 def get_next_header(self):
102 return (self.get_byte(6))
104 def get_hop_limit(self):
105 return (self.get_byte(7))
107 def get_ip_src(self):
108 address = IP6_Address(self.get_bytes()[8:24])
109 return (address)
111 def get_ip_dst(self):
112 address = IP6_Address(self.get_bytes()[24:40])
113 return (address)
115############################################################################
116 def set_ip_v(self, version):
117 if (version != 6): 117 ↛ 118line 117 didn't jump to line 118, because the condition on line 117 was never true
118 raise Exception('set_ip_v - version != 6')
120 #Fetch byte, clear high nibble
121 b = self.get_byte(0) & 0x0F
122 #Store version number in high nibble
123 b |= (version << 4)
124 #Store byte in buffer
125 #This behaviour is repeated in the rest of the methods
126 self.set_byte(0, b)
129 def set_traffic_class(self, traffic_class):
130 b0 = self.get_byte(0) & 0xF0
131 b1 = self.get_byte(1) & 0x0F
132 b0 |= (traffic_class & 0xF0) >> 4
133 b1 |= (traffic_class & 0x0F) << 4
134 self.set_byte(0, b0)
135 self.set_byte(1, b1)
138 def set_flow_label(self, flow_label):
139 b1 = self.get_byte(1) & 0xF0
140 b1 |= (flow_label & 0xF0000) >> 16
141 self.set_byte(1, b1)
142 self.set_byte(2, (flow_label & 0x0FF00) >> 8)
143 self.set_byte(3, (flow_label & 0x000FF))
146 def set_payload_length(self, payload_length):
147 self.set_byte(4, (payload_length & 0xFF00) >> 8)
148 self.set_byte(5, (payload_length & 0x00FF))
151 def set_next_header(self, next_header):
152 self.set_byte(6, next_header)
154 def set_hop_limit(self, hop_limit):
155 self.set_byte(7, hop_limit)
157 def set_ip_src(self, source_address):
158 address = IP6_Address(source_address)
159 bytes = self.get_bytes()
160 bytes[8:24] = address.as_bytes()
161 self.set_bytes(bytes)
163 def set_ip_dst(self, destination_address):
164 address = IP6_Address(destination_address)
165 bytes = self.get_bytes()
166 bytes[24:40] = address.as_bytes()
167 self.set_bytes(bytes)
169 def get_protocol_version(self):
170 LOG.warning('deprecated soon')
171 return self.get_ip_v()
173 def get_source_address(self):
174 LOG.warning('deprecated soon')
175 return self.get_ip_src()
177 def get_destination_address(self):
178 LOG.warning('deprecated soon')
179 return self.get_ip_dst()
181 def set_protocol_version(self, version):
182 LOG.warning('deprecated soon')
183 self.set_ip_v(version)
185 def set_source_address(self, source_address):
186 LOG.warning('deprecated soon')
187 self.set_ip_src(source_address)
189 def set_destination_address(self, destination_address):
190 LOG.warning('deprecated soon')
191 self.set_ip_dst(destination_address)