不使用原始套接字发送udp请求后，如何从端口读取ICMP响应

import socket
import struct
import time

ICMP_ECHO_REQUEST = 8

def checksum(source_string):
    sum = 0
    count_to = (len(source_string) // 2) * 2
    count = 0

    while count < count_to:
        this_val = source_string[count + 1] * 256 + source_string[count]
        sum = sum + this_val
        sum = sum & 0xffffffff
        count = count + 2

    if count_to < len(source_string):
        sum = sum + source_string[len(source_string) - 1]
        sum = sum & 0xffffffff

    sum = (sum >> 16) + (sum & 0xffff)
    sum = sum + (sum >> 16)
    answer = ~sum
    answer = answer & 0xffff
    answer = answer >> 8 | (answer << 8 & 0xff00)
    return answer

def send_one_ping(sock, dest_addr, id):
    packet = struct.pack('!BBHHH', ICMP_ECHO_REQUEST, 0, 0, id, 1)
    checksum_value = checksum(packet)
    packet = struct.pack('!BBHHH', ICMP_ECHO_REQUEST, 0, checksum_value, id, 1)
    sock.sendto(packet, (dest_addr, 1))

def receive_one_ping(sock, id, timeout):
    time_left = timeout
    while True:
        start_time = time.time()
        readable = select.select([sock], [], [], time_left)
        time_spent = time.time() - start_time
        if not readable[0]:  # Timeout
            return None

        time_received = time.time()
        recv_packet, addr = sock.recvfrom(1024)
        icmp_header = recv_packet[20:28]
        type, code, checksum, packet_id, sequence = struct.unpack('!BBHHH', icmp_header)
        if packet_id == id:
            return time_received - start_time

        time_left -= time_spent
        if time_left <= 0:
            return None

def do_one(dest_addr, timeout):
    icmp = socket.getprotobyname("icmp")
    try:
        sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, icmp)
    except PermissionError:
        print("Permission denied. You need to run this script as root.")
        return

    my_id = os.getpid() & 0xFFFF
    send_one_ping(sock, dest_addr, my_id)
    delay = receive_one_ping(sock, my_id, timeout)
    sock.close()
    return delay

# Example usage
import os
import select

dest_addr = "8.8.8.8"  # Google's public DNS server
timeout = 1

delay = do_one(dest_addr, timeout)
if delay is not None:
    print(f"Reply from {dest_addr}: time={delay:.3f}ms")
else:
    print("Request timed out.")

from ping3 import ping, verbose_ping

# Simple ping
response_time = ping("8.8.8.8")
print(f"Response time: {response_time} ms")

# Verbose ping with more details
verbose_ping("8.8.8.8", count=4)