请给我一段python3代码，用于端口扫描。其中有多个进程，发包进程在端口5050只进行发包，收包进程监听端口5050的收包，查看源ip确定哪些ip存活

以下是一个基于Python 3的多进程端口扫描器，使用了多个进程进行端口扫描和响应处理：

import socket
import struct
import os
import multiprocessing as mp

def send_packet(ip_addr, port):
    # 创建套接字对象
    sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_ICMP)
    sock.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)

    # 构造IP头
    source_ip = socket.inet_aton('192.168.1.1')
    dest_ip = socket.inet_aton(ip_addr)
    ip_header = struct.pack('!BBHHHBBH4s4s', 69, 0, 20 + 8, os.getpid() & 0xFFFF, 0, 255, socket.IPPROTO_ICMP, 0, source_ip, dest_ip)

    # 构造ICMP头
    icmp_type = 8
    icmp_code = 0
    icmp_checksum = 0
    icmp_identifier = os.getpid() & 0xFFFF
    icmp_sequence = 1
    icmp_data = b'Hello, World!'
    icmp_header = struct.pack('!BBHHH', icmp_type, icmp_code, icmp_checksum, icmp_identifier, icmp_sequence)

    # 计算ICMP校验和
    icmp_checksum = socket.htons(~(icmp_type + icmp_code + icmp_identifier + icmp_sequence + len(icmp_data)))
    icmp_header = struct.pack('!BBHHH', icmp_type, icmp_code, icmp_checksum, icmp_identifier, icmp_sequence)

    # 发送数据包
    sock.sendto(ip_header + icmp_header + icmp_data, (ip_addr, port))

def receive_packet():
    # 创建套接字对象
    sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_ICMP)

    # 监听端口5050
    sock.bind(('192.168.1.1', 5050))

    # 循环接收ICMP响应包
    while True:
        packet, addr = sock.recvfrom(1024)
        ip_header = packet[0:20]
        icmp_header = packet[20:28]
        icmp_type, icmp_code, icmp_checksum, icmp_identifier, icmp_sequence = struct.unpack('!BBHHH', icmp_header)
        if icmp_type == 0 and icmp_code == 0 and icmp_identifier == os.getpid() & 0xFFFF and icmp_sequence == 1:
            print('Host %s is up!' % addr[0])

if __name__ == '__main__':
    # 创建进程池
    pool = mp.Pool()

    # 发送数据包
    for i in range(1, 255):
        ip_addr = '192.168.1.%d' % i
        pool.apply_async(send_packet, (ip_addr, 5050))

    # 接收响应包
    receive_packet()

该程序使用了两个进程，一个进程用于发送数据包到目标主机的端口5050，另一个进程监听端口5050的响应包，并输出存活的主机IP地址。您可以通过修改`send_packet()`函数中的端口参数来扫描不同的端口。需要注意的是，该程序需要以管理员权限运行才能正常工作。