'''catcher是从目的网卡上抓取数据的一个程序，为了避免回环，我们要做一些相应的匹配规则'''
from scapy.all import sniff from scapy.all import send, conf from scapy.all import sendp from scapy.all import * conf.sniff_promisc = True
def catcher(network_interface): pass
def send_packet(packet, interface): sendp(packet, iface=interface)
def packet_sniff(network_interface): def prn(packets): src_mac = packets[0][0].src dst_mac = packets[0][0].dst
if IP in packets:
src_ip = packets[0][1].src
dst_ip = packets[0][1].dst
proto = packets[0][1].proto
else:
src_ip = None
dst_ip = None
proto = None
if TCP in packets:
sport = packets[TCP].sport
dport = packets[TCP].dport
elif UDP in packets:
sport = packets[UDP].sport
dport = packets[UDP].dport
else:
sport = None
dport = None
print "===================== log here ==================="
print "packet captured~"
packets.show()
print " mac the packet: " + str(src_mac) + "======>" + str(dst_mac)
print " mac the packet: " + str(src_ip) + "======>" + str(dst_ip)
print "=====================log end ====================="
''' 下面做一些匹配上的规则 '''
send_packet(packets, inject_interface)
sniff(iface=network_interface, prn=prn)
capture_interface = "enp1s0" inject_interface = "enx3c46d8d41b50"
while(1): packet_sniff(capture_interface)