对于我的项目,我需要一些方法来知道当我的客户机接收到数据包时,数据包最初被发送到哪个多播组。我考虑过维护套接字到多播组的映射,并用这种方式标识它们,但肯定有某种方法可以从数据报中获取地址?你知道吗
听着,我现在正在使用:
# 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)
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))
但接收到的地址是发送机的地址。如何查看发送到的多播组?你知道吗
谢谢!你知道吗
您只加入了地址为“ff02:”的多播组:abcd:1". 因此,套接字上接收到的任何数据包都必须已发送到该多播地址。你知道吗
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