在Python中发送和接收IPv6链路本地多播UDP数据报？

import socket

# 创建IPv6的UDP套接字
sock = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)

# 设置套接字参数
sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_MULTICAST_LOOP, 1)
sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_MULTICAST_HOPS, 1)
sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_MULTICAST_IF, socket.INADDR_ANY)

import struct

# 加入到IPv6链路本地多播组
mcast_group = 'ff02::1'
interface_index = 0  # 设置为0表示使用默认接口
mreq = struct.pack('16sI', socket.inet_pton(socket.AF_INET6, mcast_group), interface_index)
sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_JOIN_GROUP, mreq)

# 发送UDP数据报
message = b'Hello, multicast!'
sock.sendto(message, (mcast_group, port))

# 接收UDP数据报
data, addr = sock.recvfrom(1024)
print('Received:', data.decode())