Question

所以，下面是我的代码。我试图建立一个通过以太网发送的特定UDP数据包。

import socket

UDP_IP = "0.0.0.0"   #I have used the actual Ip address here
UDP_PORT = 8543
MESSAGE = None
print "UDP target IP:", UDP_IP
print "UDP target port:", UDP_PORT
print "message:", MESSAGE ,"\n"
sock = socket.socket(socket.AF_INET, # Internet
socket.SOCK_DGRAM) # UDP

# struct of a first block 
dict1 = {'ID': ''}
data_20 = 200
data_200 = hex(data_20)
print data_200, '\n'

# struct of 2nd block
dict2 = {'Cmd': '', 'channel': '', 'k': ''}
data_S = '0x2 0x0 0x0'
data_arr1 = data_S.split(' ')
print data_arr1, '\n'
dict2['Cmd']  = data_arr1[0]
dict2['channel'] = data_arr1[1]
dict2['k']     = data_arr1[2]
print 'k =',dict2['k'], '; Cmd = ', dict2 ['Cmd'], '; channel = ',dict2 ['channel'],"\n"


MESSAGE = data_200 + ' ' + data_S
print "message:", MESSAGE ,"\n"

sock.sendto(str(MESSAGE), (UDP_IP, UDP_PORT)) #Even if I remove the 'str' for the message I still read the same message over wireshark

这是相同的输出（我删除了IP地址）

UDP target port: 8543
message: None 

0xc8 

['0x2', '0x0', '0x0'] 

k = 0x0 ; Cmd =  0x2 ; channel =  0x0 

message: 0xc8 0x2 0x0 0x0 


Process finished with exit code 0

和wireshark数据相同

0020               30 78 63 38 20 30                         0xc8 0
0030   78 32 20 30 78 30 20 30 78 30                     x2 0x0 0x0

我没有获得与尝试发送数据包相同的值。因此，我尝试采用略有不同的方法，相同的代码在

之下

import socket

UDP_IP = "0.0.0.0"   #I have used the actual Ip address here
UDP_PORT = 8543
MESSAGE = None
print "UDP target IP:", UDP_IP
print "UDP target port:", UDP_PORT
print "message:", MESSAGE ,"\n"
sock = socket.socket(socket.AF_INET, # Internet
socket.SOCK_DGRAM) # UDP

# struct of first block
dict1 = {'ID': ''}
data_20 = 200
data_200 = hex(data_20)
print data_200, '\n'

# struct of 2nd block
dict2 = {'Cmd': '', 'channel': '', 'k': ''}
#data_S = '0x2 0x0 0x0'
data_S = [0x02, 0x00, 0x00]
#data_arr1 = data_S.split(' ')
print data_S, '\n'
dict2['Cmd']  = data_S[0]
dict2['channel'] = data_S[1]
dict2['k']     = data_S[2]
print 'k =',dict2['k'], '; Cmd = ', dict2 ['Cmd'], '; channel = ',dict2 ['channel'],"\n"


MESSAGE = data_200 + ' ' + data_S #Evem if I remove the '' in the line I still get the same error
print "message:", MESSAGE ,"\n"

sock.sendto(str(MESSAGE), (UDP_IP, UDP_PORT))

所以在上面的方法中，我尝试使用值作为键的列表，稍后为键分配了列表。但是我得到了这样的错误

 MESSAGE = data_200 + ' ' + data_S
TypeError: cannot concatenate 'str' and 'list' objects

Process finished with exit code 1

所以，现在谈到这一点，我想看看我在wireshark上发送的数据包。如何发送？我该怎么办？

Python UDP数据包在wireshark中不相同

0 个答案: