s_sniffer.py 文件源码

def make_stamp(pkt):
    if s.IP in pkt:
        ip_send = pkt[s.IP].src
        ip_rec = pkt[s.IP].dst
    else:
        return None

    if s.TCP in pkt:
        # port_send = pkt[TCP].sport
        # port_rec = pkt[TCP].dport
        protocol = "TCP"

    elif s.UDP in pkt:
        # port_send = pkt[UDP].sport
        # port_rec = pkt[UDP].dport
        protocol = "UDP"

    elif s.ICMP in pkt:
        # port_send = 1  # pkt[ICMP].sport
        # port_rec = 1  # pkt[ICMP].dport
        protocol = "ICMP"

    else:
        return None  # if not TCP or UDP or ICMP

    return ip_send, ip_rec, protocol