服务器怎么ddos攻击

import socket
import struct

def check_syn_flood(ip, port):
    # 创建一个原始套接字
    s = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_TCP)
    
    while True:
        packet, addr = s.recvfrom(65535)
        ip_header = packet[0:20]
        tcp_header = packet[20:40]
        
        iph = struct.unpack('!BBHHHBBH4s4s', ip_header)
        tcph = struct.unpack('!HHLLBBHHH', tcp_header)
        
        source_ip = socket.inet_ntoa(iph[8])
        destination_ip = socket.inet_ntoa(iph[9])
        source_port = tcph[0]
        destination_port = tcph[1]
        
        if source_ip == ip and destination_port == port and tcph[1] == 0x02:  # SYN标志位
            print(f"Possible SYN Flood attack detected from {source_ip} to {destination_ip}:{destination_port}")
            # 在这里添加防御措施，如丢弃该IP的后续包

if __name__ == "__main__":
    check_syn_flood('192.168.1.1', 80)