from scapy.all import *

# fonction callback
def packet_capture(pkt):
    if pkt.haslayer(TCP):
        print(pkt[IP].src, "-> TCP",pkt[IP].dst,":",pkt[TCP].dport, pkt[TCP].flags)
    elif pkt.haslayer(UDP):
        print(pkt[IP].src, "-> UDP",pkt[IP].dst,":",pkt[UDP].dport)
    elif pkt.haslayer(ICMP):
        print(pkt[IP].src, "-> ICMP",pkt[IP].dst)

try:
    sniff(prn=packet_capture, filter="ip", count=50)
except PermissionError:
    print(f"{sys.argv[0]} nécessite les droits root")