Question

我有一个设备（地址bbbb :: 17：d00：30：76fb）向我的笔记本电脑发送定期数据包，Windows 10，地址2a02：2c40：100：a001：919a：2a07：1a4d：d8bc使用dst_port 61624，包len 8.

这个数据包清楚地到达笔记本电脑，正如Wireshark所见。

332 28.379668   bbbb::17:d00:30:76fb    2a02:2c40:100:a001:919a:2a07:1a4d:d8bc  UDP 70  61624 → 61624 Len=8

我的笔记本电脑正在运行以下Python脚本（忽略有关srvIds的内容）：

import socket
import sys

NODE_ADDRESS = "bbbb::17:d00:30:76fb"
# Create a UDP socket
sock = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)

# Bind the socket to the port
server_address = ('', 61624)
print('starting up on {} port {}'.format(*server_address))
sock.bind(server_address)
numb = 1

while True:
    print('\nwaiting to receive message')
    data, address = sock.recvfrom(4096)

    print('received {} bytes from {}'.format(
        len(data), address))
    print(data)
    srvIdFrom =  data[-4] | data[-3] << 8
    srvIdTo =  data[-2] | data[-1] << 8
    print('packet had srvIdFrom {} and srvIdTo {}'.format(srvIdFrom,srvIdTo))
    numb = numb + 1
    if numb > 120:
        numb = 1
    if data:
        my_bytes = bytearray()

        dummySrvId = 98
        my_bytes.append(numb)
        my_bytes.append(dummySrvId & 0xff)  # -4 (offset from end)
        my_bytes.append(dummySrvId >> 8)    # -3
        my_bytes.append(srvIdFrom & 0xff)   # -2
        my_bytes.append(srvIdFrom >> 8)     # -1


        #addressTo = (address[0],61624) # reply back, depends on how it is received
        addressTo = (NODE_ADDRESS, 61624) #reply to direct node
        sent = sock.sendto(my_bytes, addressTo)

        #print('sent {} bytes {} back to {} with numb {}'.format(
        #    sent, my_bytes, addressTo,numb))
        srvIdFrom =  my_bytes[-4] | my_bytes[-3] << 8
        srvIdTo = my_bytes[-2] | my_bytes[-1] << 8
        print('return packet had srvIdFrom {} and srvIdTo {}'.format(srvIdFrom,srvIdTo))

在运行此脚本时，它永远不会过去：

starting up on  port 61624

waiting to receive message

所以我收到一个数据包，但服务器从不使用它。我知道我做错了什么？

Answer 1

I am beyond retarded. The IPv6 address had a subtle mistake, once fixed, this works!

虽然Wireshark看到Python UDP IPv6服务器不接收数据包

1 个答案: