Python scapy.utils.checksum() Examples
The following are 30
code examples of scapy.utils.checksum().
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Example #1
| Source File: inet.py From CyberScan with GNU General Public License v3.0 | 6 votes |
|
def post_build(self, p, pay):
p += pay
dataofs = self.dataofs
if dataofs is None:
dataofs = 5+((len(self.get_field("options").i2m(self,self.options))+3)/4)
p = p[:12]+chr((dataofs << 4) | ord(p[12])&0x0f)+p[13:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
elif conf.ipv6_enabled and isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_TCP, self.underlayer, p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #2
| Source File: IGMP.py From voltha with Apache License 2.0 | 6 votes |
|
def post_build(self, pkt, payload):
pkt += payload
# max_resp_code field is reserved (0)
if self.type in [IGMP_TYPE_V3_MEMBERSHIP_REPORT,]:
mrc = 0
else:
mrc = self.encode_float(self.max_resp_code)
pkt = pkt[:1] + chr(mrc) + pkt[2:]
if self.checksum is None:
chksum = checksum(pkt)
pkt = pkt[:2] + chr(chksum >> 8) + chr(chksum & 0xff) + pkt[4:]
return pkt
Example #3
| Source File: inet.py From arissploit with GNU General Public License v3.0 | 6 votes |
|
def post_build(self, p, pay):
p += pay
l = self.len
if l is None:
l = len(p)
p = p[:4]+struct.pack("!H",l)+p[6:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
elif isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_UDP, self.underlayer, p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #4
| Source File: inet.py From arissploit with GNU General Public License v3.0 | 6 votes |
|
def post_build(self, p, pay):
p += pay
dataofs = self.dataofs
if dataofs is None:
dataofs = 5+((len(self.get_field("options").i2m(self,self.options))+3)//4)
p = p[:12]+bytes([(dataofs << 4) | (p[12])&0x0f])+p[13:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
elif conf.ipv6_enabled and isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_TCP, self.underlayer, p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #5
| Source File: inet.py From POC-EXP with GNU General Public License v3.0 | 6 votes |
|
def post_build(self, p, pay):
p += pay
l = self.len
if l is None:
l = len(p)
p = p[:4]+struct.pack("!H",l)+p[6:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
elif isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_UDP, self.underlayer, p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #6
| Source File: inet.py From POC-EXP with GNU General Public License v3.0 | 6 votes |
|
def post_build(self, p, pay):
p += pay
dataofs = self.dataofs
if dataofs is None:
dataofs = 5+((len(self.get_field("options").i2m(self,self.options))+3)/4)
p = p[:12]+chr((dataofs << 4) | ord(p[12])&0x0f)+p[13:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
elif conf.ipv6_enabled and isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_TCP, self.underlayer, p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #7
| Source File: inet.py From isip with MIT License | 6 votes |
|
def post_build(self, p, pay):
p += pay
l = self.len
if l is None:
l = len(p)
p = p[:4]+struct.pack("!H",l)+p[6:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
elif isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_UDP, self.underlayer, p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #8
| Source File: inet.py From isip with MIT License | 6 votes |
|
def post_build(self, p, pay):
p += pay
dataofs = self.dataofs
if dataofs is None:
dataofs = 5+((len(self.get_field("options").i2m(self,self.options))+3)/4)
p = p[:12]+chr((dataofs << 4) | ord(p[12])&0x0f)+p[13:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
elif conf.ipv6_enabled and isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_TCP, self.underlayer, p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #9
| Source File: inet.py From dash-hack with MIT License | 6 votes |
|
def post_build(self, p, pay):
p += pay
l = self.len
if l is None:
l = len(p)
p = p[:4]+struct.pack("!H",l)+p[6:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
elif isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_UDP, self.underlayer, p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #10
| Source File: inet.py From dash-hack with MIT License | 6 votes |
|
def post_build(self, p, pay):
p += pay
l = self.len
if l is None:
l = len(p)
p = p[:4]+struct.pack("!H",l)+p[6:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
elif isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_UDP, self.underlayer, p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #11
| Source File: inet.py From dash-hack with MIT License | 6 votes |
|
def post_build(self, p, pay):
p += pay
dataofs = self.dataofs
if dataofs is None:
dataofs = 5+((len(self.get_field("options").i2m(self,self.options))+3)/4)
p = p[:12]+chr((dataofs << 4) | ord(p[12])&0x0f)+p[13:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
elif conf.ipv6_enabled and isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_TCP, self.underlayer, p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #12
| Source File: inet.py From dash-hack with MIT License | 6 votes |
|
def post_build(self, p, pay):
p += pay
l = self.len
if l is None:
l = len(p)
p = p[:4]+struct.pack("!H",l)+p[6:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
elif isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_UDP, self.underlayer, p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #13
| Source File: inet.py From dash-hack with MIT License | 6 votes |
|
def post_build(self, p, pay):
p += pay
dataofs = self.dataofs
if dataofs is None:
dataofs = 5+((len(self.get_field("options").i2m(self,self.options))+3)/4)
p = p[:12]+chr((dataofs << 4) | ord(p[12])&0x0f)+p[13:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
elif conf.ipv6_enabled and isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_TCP, self.underlayer, p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #14
| Source File: inet.py From mptcp-abuse with GNU General Public License v2.0 | 6 votes |
|
def post_build(self, p, pay):
p += pay
l = self.len
if l is None:
l = len(p)
p = p[:4]+struct.pack("!H",l)+p[6:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
elif isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_UDP, self.underlayer, p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #15
| Source File: inet.py From CyberScan with GNU General Public License v3.0 | 6 votes |
|
def post_build(self, p, pay):
p += pay
l = self.len
if l is None:
l = len(p)
p = p[:4]+struct.pack("!H",l)+p[6:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
elif isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_UDP, self.underlayer, p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #16
| Source File: inet.py From smod-1 with GNU General Public License v2.0 | 6 votes |
|
def post_build(self, p, pay):
p += pay
l = self.len
if l is None:
l = len(p)
p = p[:4]+struct.pack("!H",l)+p[6:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
elif isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_UDP, self.underlayer, p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #17
| Source File: inet.py From CVE-2016-6366 with MIT License | 6 votes |
|
def post_build(self, p, pay):
p += pay
dataofs = self.dataofs
if dataofs is None:
dataofs = 5+((len(self.get_field("options").i2m(self,self.options))+3)/4)
p = p[:12]+chr((dataofs << 4) | ord(p[12])&0x0f)+p[13:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
elif conf.ipv6_enabled and isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_TCP, self.underlayer, p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #18
| Source File: inet.py From CVE-2016-6366 with MIT License | 6 votes |
|
def post_build(self, p, pay):
p += pay
l = self.len
if l is None:
l = len(p)
p = p[:4]+struct.pack("!H",l)+p[6:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
elif isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_UDP, self.underlayer, p)
p = p[:6]+struct.pack("!H", ck)+p[8:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #19
| Source File: inet.py From smod-1 with GNU General Public License v2.0 | 6 votes |
|
def post_build(self, p, pay):
p += pay
dataofs = self.dataofs
if dataofs is None:
dataofs = 5+((len(self.get_field("options").i2m(self,self.options))+3)/4)
p = p[:12]+chr((dataofs << 4) | ord(p[12])&0x0f)+p[13:]
if self.chksum is None:
if isinstance(self.underlayer, IP):
if self.underlayer.len is not None:
ln = self.underlayer.len-20
else:
ln = len(p)
psdhdr = struct.pack("!4s4sHH",
inet_aton(self.underlayer.src),
inet_aton(self.underlayer.dst),
self.underlayer.proto,
ln)
ck=checksum(psdhdr+p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
elif conf.ipv6_enabled and isinstance(self.underlayer, scapy.layers.inet6.IPv6) or isinstance(self.underlayer, scapy.layers.inet6._IPv6ExtHdr):
ck = scapy.layers.inet6.in6_chksum(socket.IPPROTO_TCP, self.underlayer, p)
p = p[:16]+struct.pack("!H", ck)+p[18:]
else:
warning("No IP underlayer to compute checksum. Leaving null.")
return p
Example #20
| Source File: carp.py From dash-hack with MIT License | 5 votes |
|
def post_build(self, pkt, pay):
if self.chksum == None:
pkt = pkt[:6] + struct.pack("!H", checksum(pkt)) + pkt[8:]
return pkt
Example #21
| Source File: carp.py From smod-1 with GNU General Public License v2.0 | 5 votes |
|
def post_build(self, pkt, pay):
if self.chksum == None:
pkt = pkt[:6] + struct.pack("!H", checksum(pkt)) + pkt[8:]
return pkt
Example #22
| Source File: inet.py From isip with MIT License | 5 votes |
|
def post_build(self, p, pay):
ihl = self.ihl
p += "\0"*((-len(p))%4) # pad IP options if needed
if ihl is None:
ihl = len(p)/4
p = chr(((self.version&0xf)<<4) | ihl&0x0f)+p[1:]
if self.len is None:
l = len(p)+len(pay)
p = p[:2]+struct.pack("!H", l)+p[4:]
if self.chksum is None:
ck = checksum(p)
p = p[:10]+chr(ck>>8)+chr(ck&0xff)+p[12:]
return p+pay
Example #23
| Source File: inet.py From smod-1 with GNU General Public License v2.0 | 5 votes |
|
def post_build(self, p, pay):
p += pay
if self.chksum is None:
ck = checksum(p)
p = p[:2]+chr(ck>>8)+chr(ck&0xff)+p[4:]
return p
Example #24
| Source File: inet.py From isip with MIT License | 5 votes |
|
def post_build(self, p, pay):
p += pay
if self.chksum is None:
ck = checksum(p)
p = p[:2]+chr(ck>>8)+chr(ck&0xff)+p[4:]
return p
Example #25
| Source File: carp.py From isip with MIT License | 5 votes |
|
def post_build(self, pkt, pay):
if self.chksum == None:
pkt = pkt[:6] + struct.pack("!H", checksum(pkt)) + pkt[8:]
return pkt
Example #26
| Source File: inet.py From POC-EXP with GNU General Public License v3.0 | 5 votes |
|
def post_build(self, p, pay):
ihl = self.ihl
p += "\0"*((-len(p))%4) # pad IP options if needed
if ihl is None:
ihl = len(p)/4
p = chr(((self.version&0xf)<<4) | ihl&0x0f)+p[1:]
if self.len is None:
l = len(p)+len(pay)
p = p[:2]+struct.pack("!H", l)+p[4:]
if self.chksum is None:
ck = checksum(p)
p = p[:10]+chr(ck>>8)+chr(ck&0xff)+p[12:]
return p+pay
Example #27
| Source File: inet.py From smod-1 with GNU General Public License v2.0 | 5 votes |
|
def post_build(self, p, pay):
ihl = self.ihl
p += "\0"*((-len(p))%4) # pad IP options if needed
if ihl is None:
ihl = len(p)/4
p = chr(((self.version&0xf)<<4) | ihl&0x0f)+p[1:]
if self.len is None:
l = len(p)+len(pay)
p = p[:2]+struct.pack("!H", l)+p[4:]
if self.chksum is None:
ck = checksum(p)
p = p[:10]+chr(ck>>8)+chr(ck&0xff)+p[12:]
return p+pay
Example #28
| Source File: inet.py From POC-EXP with GNU General Public License v3.0 | 5 votes |
|
def post_build(self, p, pay):
p += pay
if self.chksum is None:
ck = checksum(p)
p = p[:2]+chr(ck>>8)+chr(ck&0xff)+p[4:]
return p
Example #29
| Source File: carp.py From POC-EXP with GNU General Public License v3.0 | 5 votes |
|
def post_build(self, pkt, pay):
if self.chksum == None:
pkt = pkt[:6] + struct.pack("!H", checksum(pkt)) + pkt[8:]
return pkt
Example #30
| Source File: inet.py From arissploit with GNU General Public License v3.0 | 5 votes |
|
def post_build(self, p, pay):
ihl = self.ihl
p += b"\0"*((-len(p))%4) # pad IP options if needed
if ihl is None:
ihl = len(p)//4
p = bytes([((self.version&0xf)<<4) | ihl&0x0f])+p[1:]
if self.len is None:
l = len(p)+len(pay)
p = p[:2]+struct.pack("!H", l)+p[4:]
if self.chksum is None:
ck = checksum(p)
p = p[:10]+bytes([ck>>8])+bytes([ck&0xff])+p[12:]
return p+pay
