def make_route(self, host=None, net=None, gw=None, dev=None):
if host is not None:
thenet,msk = host,32
elif net is not None:
thenet,msk = net.split("/")
msk = int(msk)
else:
raise Scapy_Exception("make_route: Incorrect parameters. You should specify a host or a net")
if gw is None:
gw="0.0.0.0"
if dev is None:
if gw:
nhop = gw
else:
nhop = thenet
dev,ifaddr,x = self.route(nhop)
else:
ifaddr = get_if_addr(dev)
return (atol(thenet), itom(msk), gw, dev, ifaddr)
python类Scapy_Exception()的实例源码
def make_route(self, host=None, net=None, gw=None, dev=None):
if host is not None:
thenet,msk = host,32
elif net is not None:
thenet,msk = net.split("/")
msk = int(msk)
else:
raise Scapy_Exception("make_route: Incorrect parameters. You should specify a host or a net")
if gw is None:
gw="0.0.0.0"
if dev is None:
if gw:
nhop = gw
else:
nhop = thenet
dev,ifaddr,x = self.route(nhop)
else:
ifaddr = get_if_addr(dev)
return (atol(thenet), itom(msk), gw, dev, ifaddr)
def __init__(self, filename):
self.filename = filename
try:
self.f = gzip.open(filename,"rb")
magic = self.f.read(4)
except IOError:
self.f = open(filename,"rb")
magic = self.f.read(4)
if magic == "\xa1\xb2\xc3\xd4": #big endian
self.endian = ">"
elif magic == "\xd4\xc3\xb2\xa1": #little endian
self.endian = "<"
else:
raise Scapy_Exception("Not a pcap capture file (bad magic)")
hdr = self.f.read(20)
if len(hdr)<20:
raise Scapy_Exception("Invalid pcap file (too short)")
vermaj,vermin,tz,sig,snaplen,linktype = struct.unpack(self.endian+"HHIIII",hdr)
self.linktype = linktype
def make_route(self, host=None, net=None, gw=None, dev=None):
if host is not None:
thenet,msk = host,32
elif net is not None:
thenet,msk = net.split("/")
msk = int(msk)
else:
raise Scapy_Exception("make_route: Incorrect parameters. You should specify a host or a net")
if gw is None:
gw="0.0.0.0"
if dev is None:
if gw:
nhop = gw
else:
nhop = thenet
dev,ifaddr,x = self.route(nhop)
else:
ifaddr = get_if_addr(dev)
return (atol(thenet), itom(msk), gw, dev, ifaddr)
def make_route(self, host=None, net=None, gw=None, dev=None):
if host is not None:
thenet,msk = host,32
elif net is not None:
thenet,msk = net.split("/")
msk = int(msk)
else:
raise Scapy_Exception("make_route: Incorrect parameters. You should specify a host or a net")
if gw is None:
gw="0.0.0.0"
if dev is None:
if gw:
nhop = gw
else:
nhop = thenet
dev,ifaddr,x = self.route(nhop)
else:
ifaddr = get_if_addr(dev)
return (atol(thenet), itom(msk), gw, dev, ifaddr)
def __init__(self, filename):
self.filename = filename
try:
self.f = gzip.open(filename,"rb")
magic = self.f.read(4)
except IOError:
self.f = open(filename,"rb")
magic = self.f.read(4)
if magic == "\xa1\xb2\xc3\xd4": #big endian
self.endian = ">"
elif magic == "\xd4\xc3\xb2\xa1": #little endian
self.endian = "<"
else:
raise Scapy_Exception("Not a pcap capture file (bad magic)")
hdr = self.f.read(20)
if len(hdr)<20:
raise Scapy_Exception("Invalid pcap file (too short)")
vermaj,vermin,tz,sig,snaplen,linktype = struct.unpack(self.endian+"HHIIII",hdr)
self.linktype = linktype
def make_route(self, host=None, net=None, gw=None, dev=None):
if host is not None:
thenet,msk = host,32
elif net is not None:
thenet,msk = net.split("/")
msk = int(msk)
else:
raise Scapy_Exception("make_route: Incorrect parameters. You should specify a host or a net")
if gw is None:
gw="0.0.0.0"
if dev is None:
if gw:
nhop = gw
else:
nhop = thenet
dev,ifaddr,x = self.route(nhop)
else:
ifaddr = get_if_addr(dev)
return (atol(thenet), itom(msk), gw, dev, ifaddr)
def __call__(cls, filename):
"""Creates a cls instance, use the `alternative` if that
fails.
"""
i = cls.__new__(cls, cls.__name__, cls.__bases__, cls.__dict__)
filename, fdesc, magic = cls.open(filename)
try:
i.__init__(filename, fdesc, magic)
except Scapy_Exception:
if "alternative" in cls.__dict__:
cls = cls.__dict__["alternative"]
i = cls.__new__(cls, cls.__name__, cls.__bases__, cls.__dict__)
try:
i.__init__(filename, fdesc, magic)
except Scapy_Exception:
try:
self.f.seek(-4, 1)
except:
pass
raise Scapy_Exception("Not a supported capture file")
return i
def __init__(self, filename, fdesc, magic):
self.filename = filename
self.f = fdesc
# A list of (linktype, snaplen); will be populated by IDBs.
self.interfaces = []
self.blocktypes = {
1: self.read_block_idb,
6: self.read_block_epb,
}
if magic != "\x0a\x0d\x0d\x0a": # PcapNg:
raise Scapy_Exception(
"Not a pcapng capture file (bad magic: %r)" % magic
)
# see https://github.com/pcapng/pcapng
blocklen, magic = self.f.read(4), self.f.read(4)
if magic == "\x1a\x2b\x3c\x4d":
self.endian = ">"
elif magic == "\x4d\x3c\x2b\x1a":
self.endian = "<"
else:
raise Scapy_Exception("Not a pcapng capture file (bad magic)")
self.f.seek(0)
def read_packet(self, size=MTU):
"""Read blocks until it reaches either EOF or a packet, and
returns None or (packet, (linktype, sec, usec, wirelen)),
where packet is a string.
"""
while True:
try:
blocktype, blocklen = struct.unpack(self.endian + "2I",
self.f.read(8))
except struct.error:
return None
block = self.f.read(blocklen - 12)
try:
if (blocklen,) != struct.unpack(self.endian + 'I',
self.f.read(4)):
raise Scapy_Exception(
"Invalid pcapng block (bad blocklen)"
)
except struct.error:
return None
res = self.blocktypes.get(blocktype,
lambda block, size: None)(block, size)
if res is not None:
return res
def make_route(self, host=None, net=None, gw=None, dev=None):
if host is not None:
thenet,msk = host,32
elif net is not None:
thenet,msk = net.split("/")
msk = int(msk)
else:
raise Scapy_Exception("make_route: Incorrect parameters. You should specify a host or a net")
if gw is None:
gw="0.0.0.0"
if dev is None:
if gw:
nhop = gw
else:
nhop = thenet
dev,ifaddr,x = self.route(nhop)
else:
ifaddr = get_if_addr(dev)
return (atol(thenet), itom(msk), gw, dev, ifaddr)
def __init__(self, filename):
self.filename = filename
try:
self.f = gzip.open(filename,"rb")
magic = self.f.read(4)
except IOError:
self.f = open(filename,"rb")
magic = self.f.read(4)
if magic == "\xa1\xb2\xc3\xd4": #big endian
self.endian = ">"
elif magic == "\xd4\xc3\xb2\xa1": #little endian
self.endian = "<"
else:
raise Scapy_Exception("Not a pcap capture file (bad magic)")
hdr = self.f.read(20)
if len(hdr)<20:
raise Scapy_Exception("Invalid pcap file (too short)")
vermaj,vermin,tz,sig,snaplen,linktype = struct.unpack(self.endian+"HHIIII",hdr)
self.linktype = linktype
def make_route(self, host=None, net=None, gw=None, dev=None):
if host is not None:
thenet,msk = host,32
elif net is not None:
thenet,msk = net.split("/")
msk = int(msk)
else:
raise Scapy_Exception("make_route: Incorrect parameters. You should specify a host or a net")
if gw is None:
gw="0.0.0.0"
if dev is None:
if gw:
nhop = gw
else:
nhop = thenet
dev,ifaddr,x = self.route(nhop)
else:
ifaddr = get_if_addr(dev)
return (atol(thenet), itom(msk), gw, dev, ifaddr)
def __init__(self, filename):
self.filename = filename
try:
self.f = gzip.open(filename,"rb")
magic = self.f.read(4)
except IOError:
self.f = open(filename,"rb")
magic = self.f.read(4)
if magic == "\xa1\xb2\xc3\xd4": #big endian
self.endian = ">"
elif magic == "\xd4\xc3\xb2\xa1": #little endian
self.endian = "<"
else:
raise Scapy_Exception("Not a pcap capture file (bad magic)")
hdr = self.f.read(20)
if len(hdr)<20:
raise Scapy_Exception("Invalid pcap file (too short)")
vermaj,vermin,tz,sig,snaplen,linktype = struct.unpack(self.endian+"HHIIII",hdr)
self.linktype = linktype
def make_route(self, host=None, net=None, gw=None, dev=None):
if host is not None:
thenet,msk = host,32
elif net is not None:
thenet,msk = net.split("/")
msk = int(msk)
else:
raise Scapy_Exception("make_route: Incorrect parameters. You should specify a host or a net")
if gw is None:
gw="0.0.0.0"
if dev is None:
if gw:
nhop = gw
else:
nhop = thenet
dev,ifaddr,x = self.route(nhop)
else:
ifaddr = get_if_addr(dev)
return (atol(thenet), itom(msk), gw, dev, ifaddr)
def __call__(cls, filename):
"""Creates a cls instance, use the `alternative` if that
fails.
"""
i = cls.__new__(cls, cls.__name__, cls.__bases__, cls.__dict__)
filename, fdesc, magic = cls.open(filename)
try:
i.__init__(filename, fdesc, magic)
except Scapy_Exception:
if "alternative" in cls.__dict__:
cls = cls.__dict__["alternative"]
i = cls.__new__(cls, cls.__name__, cls.__bases__, cls.__dict__)
try:
i.__init__(filename, fdesc, magic)
except Scapy_Exception:
try:
self.f.seek(-4, 1)
except:
pass
raise Scapy_Exception("Not a supported capture file")
return i
def __init__(self, filename, fdesc, magic):
self.filename = filename
self.f = fdesc
# A list of (linktype, snaplen); will be populated by IDBs.
self.interfaces = []
self.blocktypes = {
1: self.read_block_idb,
6: self.read_block_epb,
}
if magic != "\x0a\x0d\x0d\x0a": # PcapNg:
raise Scapy_Exception(
"Not a pcapng capture file (bad magic: %r)" % magic
)
# see https://github.com/pcapng/pcapng
blocklen, magic = self.f.read(4), self.f.read(4)
if magic == "\x1a\x2b\x3c\x4d":
self.endian = ">"
elif magic == "\x4d\x3c\x2b\x1a":
self.endian = "<"
else:
raise Scapy_Exception("Not a pcapng capture file (bad magic)")
self.f.seek(0)
def read_packet(self, size=MTU):
"""Read blocks until it reaches either EOF or a packet, and
returns None or (packet, (linktype, sec, usec, wirelen)),
where packet is a string.
"""
while True:
try:
blocktype, blocklen = struct.unpack(self.endian + "2I",
self.f.read(8))
except struct.error:
return None
block = self.f.read(blocklen - 12)
try:
if (blocklen,) != struct.unpack(self.endian + 'I',
self.f.read(4)):
raise Scapy_Exception(
"Invalid pcapng block (bad blocklen)"
)
except struct.error:
return None
res = self.blocktypes.get(blocktype,
lambda block, size: None)(block, size)
if res is not None:
return res
def make_route(self, host=None, net=None, gw=None, dev=None):
if host is not None:
thenet,msk = host,32
elif net is not None:
thenet,msk = net.split("/")
msk = int(msk)
else:
raise Scapy_Exception("make_route: Incorrect parameters. You should specify a host or a net")
if gw is None:
gw="0.0.0.0"
if dev is None:
if gw:
nhop = gw
else:
nhop = thenet
dev,ifaddr,x = self.route(nhop)
else:
ifaddr = get_if_addr(dev)
return (atol(thenet), itom(msk), gw, dev, ifaddr)
def __init__(self, filename):
self.filename = filename
try:
self.f = gzip.open(filename,"rb")
magic = self.f.read(4)
except IOError:
self.f = open(filename,"rb")
magic = self.f.read(4)
if magic == "\xa1\xb2\xc3\xd4": #big endian
self.endian = ">"
elif magic == "\xd4\xc3\xb2\xa1": #little endian
self.endian = "<"
else:
raise Scapy_Exception("Not a pcap capture file (bad magic)")
hdr = self.f.read(20)
if len(hdr)<20:
raise Scapy_Exception("Invalid pcap file (too short)")
vermaj,vermin,tz,sig,snaplen,linktype = struct.unpack(self.endian+"HHIIII",hdr)
self.linktype = linktype
def add_payload(self, payload):
raise Scapy_Exception("Can't add payload to NoPayload instance")
def fragment(self, *args, **kargs):
raise Scapy_Exception("cannot fragment this packet")
def sprintf(self, fmt, relax):
if relax:
return "??"
else:
raise Scapy_Exception("Format not found [%s]"%fmt)
def add_payload(self, payload):
raise Scapy_Exception("Can't add payload to NoPayload instance")
def fragment(self, *args, **kargs):
raise Scapy_Exception("cannot fragment this packet")
def sprintf(self, fmt, relax):
if relax:
return "??"
else:
raise Scapy_Exception("Format not found [%s]"%fmt)
def add_payload(self, payload):
raise Scapy_Exception("Can't add payload to NoPayload instance")
def fragment(self, *args, **kargs):
raise Scapy_Exception("cannot fragment this packet")
def sprintf(self, fmt, relax):
if relax:
return "??"
else:
raise Scapy_Exception("Format not found [%s]"%fmt)
def add_payload(self, payload):
raise Scapy_Exception("Can't add payload to NoPayload instance")
