def reply(pkt):
"""
Reply to the packet which the sniffer capture.
"""
if pkt[ICMP].type == 8:
ip = IP()
ip.dst = pkt[IP].src
ip.src = pkt[IP].dst
icmp = ICMP()
icmp.id = pkt[ICMP].id
icmp.seq = pkt[ICMP].seq
icmp.type = 0
raw = Raw()
raw.load = pkt[Raw].load
send(ip / icmp / raw)
def print_pkt(pkt):
if (pkt[ICMP].type == 8):
eth = Ether()
eth.dst = pkt[Ether].src
eth.src = pkt[Ether].dst
ip = IP()
ip.dst = pkt[IP].src
ip.src = pkt[IP].dst
ip.ihl = pkt[IP].ihl
icmp = ICMP()
icmp.id = pkt[ICMP].id
icmp.seq = pkt[ICMP].seq
icmp.type = 0
raw = Raw()
raw.load = pkt[Raw].load
send(eth / ip / icmp / raw)
def cmd_ping(ip_dst, ip_src, seq, icmp_id):
conf.verb = False
layer3 = IP()
layer3.src = ip_src
layer3.dst = ip_dst
layer3.tos = 0
layer3.id = 1
layer3.flags = 0
layer3.frag = 0
layer3.ttl = 128
layer3.proto = 1 # icmp
layer4 = ICMP()
layer4.type = 8 # echo-request
layer4.code = 0
layer4.id = icmp_id
layer4.seq = seq
pkt = layer3 / layer4 / b"abcdefghijklmn opqrstuvwabcdefg hi"
send(pkt)
print("Ping Sent")
def generate_icmp_wrapper(plumber_pkt):
ip_layer = IP(src=plumber_pkt.src_ip, dst=plumber_pkt.ip)
icmp_layer = ICMP(type="echo-reply")
icmp_layer.id, icmp_layer.seq = plumber_pkt.id, plumber_pkt.seq
plumber_pkt.message_target = "client"
return ip_layer / icmp_layer / plumber_pkt
