I asked this question last week but feel i didn't give enough information and fully explain what it is i am doing. so i am opening a new, better documented question that hopefully will be easier to understand.
I am developing a python module/library that will allow a connection to a hivemq broker with a custom version of the file authentication plugin on hivemq's website(www.hivemq.com/plugins). this plugin uses http authentication instead of the file authentication.
This python module is being used to connect a raspberry-pi2 to the hivemq broker but I am having problems with the authentication. The pi will connect in the absence of the plugin. displaying these messages from the on_log an on_message functions:
16 Received CONNACK (0, 0)
connected with the result code 0
However, as soon as I add the authentication plugin to the broker it then gives me these messages:
16 Received CONNACK (0, 5)
connected with the result code 5
to my understanding, result code 5 means refused due to not being authorised.
I also get this message from the broker:
ERROR- Could not get valid results from the webservice
org.apache.http.NoHttpResponseException: The targer server failed to respond
at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpRespoonseParser.hava:143)
I was told in the previous question that this was due to the broker not finding the http server. but i only get this message when the raspberry-pi connects so i dont understand why it can find with other devices but not the pi.
My code for the module is as follows:
import paho.mqtt.client as mqtt
#import base64
#create a client instance
client = mqtt.Client()
#The callback for when the client recieves a CONNACK response from the server
def on_connect(client, userdata, flags, rc):
print("connected with the result code "+str(rc))
#print("usrData: "+str(userdata))
#print("client: " +str(client))
#print("flags: " +str(flags))
#Define any topics you would like the pi to
#automatically subscribe to here
#The callback for when this client publishes to the server.
def on_publish(client, userdata, mid):
print("message published")
#The callback for when a PUBLISH message is recieve from the server.
def on_message(client, userdata, msg):
print(msg.topic+" "+str(msg.payload))
def on_log(client, userdata, level, buf):
print(str(level)+" "+str(buf))
#set callbacks
def setup():
client.on_connect = on_connect
client.on_message = on_message
client.on_publish = on_publish
client.on_log = on_log
#setup connection to broker
def connect(username, password):
client.username_pw_set(username, password)
#client.connect("mqtt.owly.uk")
client.connect("10.19.110.73")
#publish to a topic
def publish(topic, message):
client.publish(topic, message)
def loop():
client.loop()
I think the problem is with how the paho client formats the request to the broker. i cant really think of what else it could be. i have arduinos connected to it, mqtt.fx clients connect, the only problem is with the raspberry pi.
Sorry for the lengthy question and thanks for the help in advance.
EDIT: ADDED tcpdump with packet details
pi@raspberrypi ~ $ sudo tcpdump -nnXSs 0 port 1883
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
10:36:12.626081 IP 10.19.8.61.60353 > 52.30.179.227.1883: Flags [S], seq 1221863 198, win 29200, options [mss 1460,sackOK,TS val 227462 ecr 0,nop,wscale 7], leng th 0
0x0000: 4500 003c 5f98 4000 4006 e0d2 0a13 083d E..<_.@.@......=
0x0010: 341e b3e3 ebc1 075b 48d4 271e 0000 0000 4......[H.'.....
0x0020: a002 7210 fa7f 0000 0204 05b4 0402 080a ..r.............
0x0030: 0003 7886 0000 0000 0103 0307 ..x.........
10:36:12.638249 IP 52.30.179.227.1883 > 10.19.8.61.60353: Flags [S.], seq 104987 220, ack 1221863199, win 17898, options [mss 8961,sackOK,TS val 1882686450 ecr 2 27462,nop,wscale 7], length 0
0x0000: 4500 003c 0000 4000 3106 4f6b 341e b3e3 E..<..@.1.Ok4...
0x0010: 0a13 083d 075b ebc1 0641 fa54 48d4 271f ...=.[...A.TH.'.
0x0020: a012 45ea 1a0e 0000 0204 2301 0402 080a ..E.......#.....
0x0030: 7037 83f2 0003 7886 0103 0307 p7....x.....
10:36:12.638365 IP 10.19.8.61.60353 > 52.30.179.227.1883: Flags [.], ack 1049872 21, win 229, options [nop,nop,TS val 227464 ecr 1882686450], length 0
0x0000: 4500 0034 5f99 4000 4006 e0d9 0a13 083d E..4_.@.@......=
0x0010: 341e b3e3 ebc1 075b 48d4 271f 0641 fa55 4......[H.'..A.U
0x0020: 8010 00e5 fa77 0000 0101 080a 0003 7888 .....w........x.
0x0030: 7037 83f2 p7..
10:36:12.639260 IP 10.19.8.61.60353 > 52.30.179.227.1883: Flags [P.], seq 122186 3199:1221863304, ack 104987221, win 229, options [nop,nop,TS val 227464 ecr 1882 686450], length 105
0x0000: 4500 009d 5f9a 4000 4006 e06f 0a13 083d E..._.@.@..o...=
0x0010: 341e b3e3 ebc1 075b 48d4 271f 0641 fa55 4......[H.'..A.U
0x0020: 8018 00e5 fae0 0000 0101 080a 0003 7888 ..............x.
0x0030: 7037 83f2 1067 0006 4d51 4973 6470 03c2 p7...g..MQIsdp..
0x0040: 003c 0017 7061 686f 2f43 3844 3032 3037 .<..paho/C8D0207
0x0050: 4432 3344 3935 4636 3437 4600 1f39 6136 D23D95F647F..9a6
0x0060: 3632 6235 3934 6566 6632 3237 6661 6131 62b594eff227faa1
0x0070: 6435 6365 6436 3937 3065 6665 001f 3039 d5ced6970efe..09
0x0080: 6630 3865 3762 3432 3336 3266 6661 6435 f08e7b42362ffad5
0x0090: 6430 6664 3237 3836 3561 6231 37 d0fd27865ab17
10:36:12.651185 IP 52.30.179.227.1883 > 10.19.8.61.60353: Flags [.], ack 1221863 304, win 140, options [nop,nop,TS val 1882686463 ecr 227464], length 0
0x0000: 4500 0034 79aa 4000 3106 d5c8 341e b3e3 E..4y.@.1...4...
0x0010: 0a13 083d 075b ebc1 0641 fa55 48d4 2788 ...=.[...A.UH.'.
0x0020: 8010 008c ab0d 0000 0101 080a 7037 83ff ............p7..
0x0030: 0003 7888 ..x.
10:36:12.654912 IP 52.30.179.227.1883 > 10.19.8.61.60353: Flags [P.], seq 104987 221:104987225, ack 1221863304, win 140, options [nop,nop,TS val 1882686467 ecr 2 27464], length 4
0x0000: 4500 0038 79ab 4000 3106 d5c3 341e b3e3 E..8y.@.1...4...
0x0010: 0a13 083d 075b ebc1 0641 fa55 48d4 2788 ...=.[...A.UH.'.
0x0020: 8018 008c 8af6 0000 0101 080a 7037 8403 ............p7..
0x0030: 0003 7888 2002 0005 ..x.....
10:36:12.654954 IP 10.19.8.61.60353 > 52.30.179.227.1883: Flags [.], ack 1049872 25, win 229, options [nop,nop,TS val 227465 ecr 1882686467], length 0
0x0000: 4500 0034 5f9b 4000 4006 e0d7 0a13 083d E..4_.@.@......=
0x0010: 341e b3e3 ebc1 075b 48d4 2788 0641 fa59 4......[H.'..A.Y
0x0020: 8010 00e5 fa77 0000 0101 080a 0003 7889 .....w........x.
0x0030: 7037 8403 p7..
10:36:12.654915 IP 52.30.179.227.1883 > 10.19.8.61.60353: Flags [F.], seq 104987 225, ack 1221863304, win 140, options [nop,nop,TS val 1882686467 ecr 227464], le ngth 0
0x0000: 4500 0034 79ac 4000 3106 d5c6 341e b3e3 E..4y.@.1...4...
0x0010: 0a13 083d 075b ebc1 0641 fa59 48d4 2788 ...=.[...A.YH.'.
0x0020: 8011 008c ab04 0000 0101 080a 7037 8403 ............p7..
0x0030: 0003 7888 ..x.
10:36:12.655687 IP 10.19.8.61.60353 > 52.30.179.227.1883: Flags [F.], seq 122186 3304, ack 104987226, win 229, options [nop,nop,TS val 227465 ecr 1882686467], le ngth 0
0x0000: 4500 0034 5f9c 4000 4006 e0d6 0a13 083d E..4_.@.@......=
0x0010: 341e b3e3 ebc1 075b 48d4 2788 0641 fa5a 4......[H.'..A.Z
0x0020: 8011 00e5 fa77 0000 0101 080a 0003 7889 .....w........x.
0x0030: 7037 8403 p7..
10:36:12.667605 IP 52.30.179.227.1883 > 10.19.8.61.60353: Flags [.], ack 1221863 305, win 140, options [nop,nop,TS val 1882686480 ecr 227465], length 0
0x0000: 4500 0034 79ad 4000 3106 d5c5 341e b3e3 E..4y.@.1...4...
0x0010: 0a13 083d 075b ebc1 0641 fa5a 48d4 2789 ...=.[...A.ZH.'.
0x0020: 8010 008c aaf5 0000 0101 080a 7037 8410 ............p7..
0x0030: 0003 7889 ..x.
^C
10 packets captured
10 packets received by filter
0 packets dropped by kernel
