def next_packet(self):
header = ctypes.POINTER(winpcapy.pcap_pkthdr)()
pkt_data = ctypes.POINTER(ctypes.c_ubyte)()
res = winpcapy.pcap_next_ex(
self._fp,
ctypes.byref(header),
ctypes.byref(pkt_data),
)
if(res == -1):
raise RuntimeError(
'pcap_next_ex failed: ' % winpcapy.pcap_geterr(self._fp)
)
if res == 0:
return None
return {
'header': {
'timestamp': (
datetime.datetime.utcfromtimestamp(
header.contents.ts.tv_sec
) +
datetime.timedelta(
microseconds=header.contents.ts.tv_usec,
)
),
'caplen': header.contents.caplen,
'len': header.contents.len,
},
'data': bytearray(pkt_data[
:min(header.contents.caplen, header.contents.len)
]),
}
def send_packet(self, data):
b = bytearray(data)
packet = (ctypes.c_ubyte * len(b))(*b)
if (winpcapy.pcap_sendpacket(self._fp, packet, len(b)) != 0):
raise RuntimeError(
'pcap_sendpacket failed: ' % winpcapy.pcap_geterr(self._fp)
)
def PcapSend(self):
from winpcapy import pcap_sendpacket,pcap_geterr
self.Buffer = binascii.a2b_hex(self.MAC_Dst+self.MAC_Src+self.Eth_Typ) + self.Buffer
print(binascii.b2a_hex(self.Buffer))
if pcap_sendpacket(self.Pcap_t,cast(self.Buffer,POINTER(c_ubyte)),len(self.Buffer)) == 0:
return True
else:
print ("Error sending the packet: %s" % pcap_geterr(self.Pcap_t))
return False
def recvfrom(self, bufsize):
# retrieve a packet from pcap
header = ctypes.POINTER(capy.pcap_pkthdr)()
pkt_data = ctypes.POINTER(ctypes.c_ubyte)()
status = capy.pcap_next_ex(self._fp, ctypes.byref(header), ctypes.byref(pkt_data))
if status == 0:
# timeout
return False
elif status > 0:
# interpret captured packet
pkt_len = header.contents.caplen
pkt_buf = ctypes.string_at(pkt_data, pkt_len)
pkt = dpkt.ethernet.Ethernet(pkt_buf)
return (pkt_buf, pkt.src)
else:
# some error occured
raise ("error capturing packets: %s" % capy.pcap_geterr(self._fp))
pass
def recvfrom(self, bufsize):
# retrieve a packet from pcap
header = ctypes.POINTER(capy.pcap_pkthdr)()
pkt_data = ctypes.POINTER(ctypes.c_ubyte)()
status = capy.pcap_next_ex(self._fp, ctypes.byref(header),
ctypes.byref(pkt_data))
if (status == 0):
# timeout
return False
elif (status > 0):
# interpret captured packet
pkt_len = header.contents.caplen
pkt_buf = ctypes.string_at(pkt_data, pkt_len)
pkt = dpkt.ethernet.Ethernet(pkt_buf)
return (pkt_buf, pkt.src)
else:
# some error occured
raise ('error capturing packets: %s' %
capy.pcap_geterr(self._fp))
pass
