Question

winpcap在python3中的使用，求助

Answer 1

from ctypes import *
from winpcapy import *
import time
import sys
import string
import platform

if platform.python_version()[0] == "3":
raw_input=input
#/* prototype of the packet handler */
#void packet_handler(u_char *param, const struct pcap_pkthdr *header, const u_char *pkt_data);
PHAND=CFUNCTYPE(None,POINTER(c_ubyte),POINTER(pcap_pkthdr),POINTER(c_ubyte))

## Callback function invoked by libpcap for every incoming packet
def _packet_handler(param,header,pkt_data):
## convert the timestamp to readable format
local_tv_sec = header.contents.ts.tv_sec
ltime=time.localtime(local_tv_sec);
timestr=time.strftime("%H:%M:%S", ltime)
print
print("%s,%.6d len:%d" % (timestr, header.contents.ts.tv_usec, header.contents.len))

packet_handler=PHAND(_packet_handler)
alldevs=POINTER(pcap_if_t)()
errbuf= create_string_buffer(PCAP_ERRBUF_SIZE)
## Retrieve the device list
if (pcap_findalldevs(byref(alldevs), errbuf) == -1):
print ("Error in pcap_findalldevs: %s\n" % errbuf.value)
sys.exit(1)
## Print the list
i=0
try:
d=alldevs.contents
except:
print ("Error in pcap_findalldevs: %s" % errbuf.value)
print ("Maybe you need admin privilege?\n")
sys.exit(1)
while d:
i=i+1
print("%d. %s" % (i, d.name))
if (d.description):
print (" (%s)\n" % (d.description))
else:
print (" (No description available)\n")
if d.next:
d=d.next.contents
else:
d=False

if (i==0):
print ("\nNo interfaces found! Make sure WinPcap is installed.\n")
sys.exit(-1)
print ("Enter the interface number (1-%d):" % (i))
inum= raw_input('--> ')
if inum in string.digits:
inum=int(inum)
else:
inum=0
if ((inum < 1) | (inum > i)):
print ("\nInterface number out of range.\n")
## Free the device list
pcap_freealldevs(alldevs)
sys.exit(-1)
## Jump to the selected adapter
d=alldevs
for i in range(0,inum-1):
d=d.contents.next
## Open the device
## Open the adapter
d=d.contents
adhandle = pcap_open_live(d.name,65536,1,1000,errbuf)
if (adhandle == None):
print("\nUnable to open the adapter. %s is not supported by Pcap-WinPcap\n" % d.contents.name)
## Free the device list
pcap_freealldevs(alldevs)
sys.exit(-1)
print("\nlistening on %s...\n" % (d.description))
## At this point, we don't need any more the device list. Free it
pcap_freealldevs(alldevs)
## start the capture (we take only 15 packets)
pcap_loop(adhandle, 15, packet_handler, None)
pcap_close(adhandle)

这是WINPCAPY自带的例子。