java 监听ipv6的udp_在Python中发送和接收IPv6链路本地多播UDP数据报？

我正在问一个关于here的问题，涉及获取收到消息的多播地址，但源代码回答了你的问题！

听：

# Initialise socket for IPv6 datagrams

sock = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM, socket.IPPROTO_UDP)

# Allows address to be reused

sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

# Binds to all interfaces on the given port

sock.bind(('', 8080))

# Allow messages from this socket to loop back for development

sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_MULTICAST_LOOP, True)

# Construct message for joining multicast group

mreq = struct.pack("16s15s".encode('utf-8'), socket.inet_pton(socket.AF_INET6, "ff02::abcd:1"), (chr(0) * 16).encode('utf-8'))

sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_JOIN_GROUP, mreq)

data, addr = sock.recvfrom(1024)

并发送：

# Create ipv6 datagram socket

sock = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)

# Allow own messages to be sent back (for local testing)

sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_MULTICAST_LOOP, True)

sock.sendto("hello world".encode('utf-8'), ("ff02::abcd:1", 8080))

这是python3.6，使用python 2.7我不认为编码是必要的 . 同样在struct.pack中，我看过“16s15s”的变体，比如“4s”，但我不知道它是什么以及我为我工作了什么！