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wb2osz
Problems with KISS over TCP
I am working with the latest version (commit 590c82b) of Direwolf on a Mac. There seems to be some problems with transmitting packets via the KISS TCP interface. I am working on a client application that connects to the KISS port and sends packets. After struggling to figure out what was wrong with my code, I began to suspect that maybe the problem is with Direwolf. So I took my app out of the equation by using kissutil to format and send the packets instead and discovered an issue.
To reproduce the issue, I created a text file with a sample packet found in the User Guide:
K1NRO-1>APDW14,WIDE2-2:!4238.80NS07105.63W#PHG5630
I started Direwolf:
direwolf -t 0 -d kn
and then also started kissutil:
./kissutil -f ~/tmp/kisstest
I then copied the sample packet into the transmit directory, sequentially, 4 times, waiting each time for the audio to let me know that the packet had been processed. In addition, I ran Wireshark in order to capture the packets passing over the loopback interface, just to ensure that the bytes produced by kissutil were exactly the same.
Even though it is the exact same packet of data, you can see from the log that Direwolf does not process it the same way all 4 times.
Here is the output from kissutil:
Processing kisstest2.txt for transmit... K1NRO-1>APDW14,WIDE2-2:!4238.80NS07105.63W#PHG5630 [0] K1NRO-1>APDW14,WIDE2-2:!4238.80NS07105.63W#PHG5630 Processing kisstest2.txt for transmit... K1NRO-1>APDW14,WIDE2-2:!4238.80NS07105.63W#PHG5630 [0] K1NRO-1>APDW14,WIDE2-2:!4238.80NS07105.63W#PHG5630 Processing kisstest2.txt for transmit... K1NRO-1>APDW14,WIDE2-2:!4238.80NS07105.63W#PHG5630 Processing kisstest2.txt for transmit... K1NRO-1>APDW14,WIDE2-2:!4238.80NS07105.63W#PHG5630 [0] K1NRO-1>APD14p-7,WIDE2-2:!4238.80NS07105.63W#PHG5630
Here is the output from direwolf:
Reading config file /Users/wbustraa/direwolf.conf
Audio input device for receive: Built-in Microphone:0 (channel 0)
Audio out device for transmit: Built-in Output:1 (channel 0)
Number of devices = 5
--------------------------------------- device #0
[ Default Input ]
Name = "Built-in Microphone"
Host API = Core Audio
Max inputs = 2
Max outputs = 0
--------------------------------------- device #1
[ Default Output ]
Name = "Built-in Output"
Host API = Core Audio
Max inputs = 0
Max outputs = 2
--------------------------------------- device #2
Name = "Soundflower (2ch)"
Host API = Core Audio
Max inputs = 2
Max outputs = 2
--------------------------------------- device #3
Name = "Soundflower (64ch)"
Host API = Core Audio
Max inputs = 64
Max outputs = 64
--------------------------------------- device #4
Name = "Multiple Output"
Host API = Core Audio
Max inputs = 0
Max outputs = 2
Channel 0: 1200 baud, AFSK 1200 & 2200 Hz, E+, 44100 sample rate.
Note: PTT not configured for channel 0. (Ignore this if using VOX.)
Use -p command line option to enable KISS pseudo terminal.
Ready to accept AGW client application 0 on port 8000 ...
Ready to accept KISS TCP client application 0 on port 8001 ...
Attached to KISS TCP client application 0...
Ready to accept KISS TCP client application 1 on port 8001 ...
<<< Data frame from KISS client application, port 0, total length = 53
000: c0 00 82 a0 88 ae 62 68 e0 96 62 9c a4 9e 40 e2 ......bh..b...@.
010: ae 92 88 8a 64 40 65 03 f0 21 34 32 33 38 2e 38 ....d@e..!4238.8
020: 30 4e 53 30 37 31 30 35 2e 36 33 57 23 50 48 47 0NS07105.63W#PHG
030: 35 36 33 30 c0 5630.
[0L] K1NRO-1>APDW14,WIDE2-2:!4238.80NS07105.63W#PHG5630
K1NRO-1 audio level = 6(3/2) [NONE] ||||||___
[0.2] K1NRO-1>APDW14,WIDE2-2:!4238.80NS07105.63W#PHG5630
Position, OVERLAY DIGI (green star) w/overlay S, DireWolf, WB2OSZ, 25 W height=640 3dBi omni
N 42 38.8000, W 071 05.6300
>>> Data frame to KISS client application, port 0, total length = 53
000: c0 00 82 a0 88 ae 62 68 e0 96 62 9c a4 9e 40 e2 ......bh..b...@.
010: ae 92 88 8a 64 40 65 03 f0 21 34 32 33 38 2e 38 ....d@e..!4238.8
020: 30 4e 53 30 37 31 30 35 2e 36 33 57 23 50 48 47 0NS07105.63W#PHG
030: 35 36 33 30 c0 5630.
<<< Data frame from KISS client application, port 0, total length = 53
000: c0 00 82 a0 88 ae 62 68 e0 96 62 9c a4 9e 40 e2 ......bh..b...@.
010: ae 92 88 8a 64 40 65 03 f0 21 34 32 33 38 2e 38 ....d@e..!4238.8
020: 30 4e 53 30 37 31 30 35 2e 36 33 57 23 50 48 47 0NS07105.63W#PHG
030: 35 36 33 30 c0 5630.
[0L] K1NRO-1>APDW14,WIDE2-2:!4238.80NS07105.63W#PHG5630
K1NRO-1 audio level = 5(2/2) [NONE] ||||||||_
[0.3] K1NRO-1>APDW14,WIDE2-2:!4238.80NS07105.63W#PHG5630
Position, OVERLAY DIGI (green star) w/overlay S, DireWolf, WB2OSZ, 25 W height=640 3dBi omni
N 42 38.8000, W 071 05.6300
>>> Data frame to KISS client application, port 0, total length = 53
000: c0 00 82 a0 88 ae 62 68 e0 96 62 9c a4 9e 40 e2 ......bh..b...@.
010: ae 92 88 8a 64 40 65 03 f0 21 34 32 33 38 2e 38 ....d@e..!4238.8
020: 30 4e 53 30 37 31 30 35 2e 36 33 57 23 50 48 47 0NS07105.63W#PHG
030: 35 36 33 30 c0 5630.
<<< Rejected Noise from KISS client application, total length = 3
000: 00 82 a0 ...
<<< TXtail from KISS client application, port 6, total length = 34
000: c0 64 40 65 03 f0 21 34 32 33 38 2e 38 30 4e 53 .d@e..!4238.80NS
010: 30 37 31 30 35 2e 36 33 57 23 50 48 47 35 36 33 07105.63W#PHG563
020: 30 c0 0.
KISS protocol set TXtail = 64 (*10mS units = 640 mS), port 6
<<< Data frame from KISS client application, port 0, total length = 53
000: c0 00 82 a0 88 62 68 e0 ae 96 62 9c a4 9e 40 e2 .....bh...b...@.
010: ae 92 88 8a 64 40 65 03 f0 21 34 32 33 38 2e 38 ....d@e..!4238.8
020: 30 4e 53 30 37 31 30 35 2e 36 33 57 23 50 48 47 0NS07105.63W#PHG
030: 35 36 33 30 c0 5630.
[0L] K1NRO-1>APD14p-7,WIDE2-2:!4238.80NS07105.63W#PHG5630
Destination Address has lower case letters. "APD14p-7" must be all upper case.
*** The origin and journey of this packet should receive some scrutiny. ***
K1NRO-1 audio level = 6(3/2) [NONE] _||||||__
[0.3] K1NRO-1>APD14p-7,WIDE2-2:!4238.80NS07105.63W#PHG5630
Position, OVERLAY DIGI (green star) w/overlay S, 25 W height=640 3dBi omni
N 42 38.8000, W 071 05.6300
Destination Address has lower case letters. "APD14p-7" must be all upper case.
*** The origin and journey of this packet should receive some scrutiny. ***
>>> Data frame to KISS client application, port 0, total length = 53
000: c0 00 82 a0 88 62 68 e0 ae 96 62 9c a4 9e 40 e2 .....bh...b...@.
010: ae 92 88 8a 64 40 65 03 f0 21 34 32 33 38 2e 38 ....d@e..!4238.8
020: 30 4e 53 30 37 31 30 35 2e 36 33 57 23 50 48 47 0NS07105.63W#PHG
030: 35 36 33 30 c0 5630.```
