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Mac port for LocalUDP strategy - Compiles but does not receive packets #225

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xlfe opened this Issue Jul 12, 2018 · 9 comments

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@xlfe
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xlfe commented Jul 12, 2018

I have been testing LocalUDP between a Mac and a RaspberryPi and have encountered some unexpected behaviour.

The network setup looks like Mac <--> Wifi <--> RaspberryPi - both on the same private subnet.

Using the examples/LINUX/Local/LocalUDP/PingPong/

CASE A - If I run the Receiver on the Mac and the transmitter on the RPI, I never get any PINGS or PONGS.

CASE B - If I swap it around, and I run the Transmitter on the Mac and the Receiver on the RPI, the RPI shows PINGS but the Transmitter never shows any PONGS.

If I run Wireshark on the Mac I can see the PONGS from the RPI Receiver on my Mac (as well as the PINGS from the Transmitter running on my Mac) - but it looks like PJON is not picking them up for some reason - the transmitter never shows any PONGS -

PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0

@gioblu

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gioblu commented Jul 13, 2018

Ciao @xlfe thank you very much for reporting. I have never tried PJON on mac, I am still working on making it reliable on lower level systems :).

Nice to know it compiles fine already.
Could you give a try to LocalUDP or GlobalUDP examples?

I will try to replicate your setup.
Thank you again.

@gioblu gioblu changed the title from LocalUDP strategy - Mac cannot receive packets to Mac port for LocalUDP strategy - Compiles but does not receive packets Jul 15, 2018

@gioblu gioblu added the port label Jul 15, 2018

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gioblu commented Jul 15, 2018

Ciao @xlfe could you please describe the building process you have used? I would like to replicate the same setup. Thank you again!

@xlfe

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xlfe commented Jul 15, 2018

@xlfe

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xlfe commented Jul 16, 2018

RaspberryPI

pi@raspberrypi:~ $ git clone https://github.com/gioblu/PJON.git
Cloning into 'PJON'...
remote: Counting objects: 11962, done.
remote: Compressing objects: 100% (69/69), done.
remote: Total 11962 (delta 38), reused 67 (delta 25), pack-reused 11864
Receiving objects: 100% (11962/11962), 4.13 MiB | 626.00 KiB/s, done.
Resolving deltas: 100% (6627/6627), done.
pi@raspberrypi:~ $ cd PJON/examples/LINUX/Local/LocalUDP/PingPong/Transmitter/
pi@raspberrypi:~/PJON/examples/LINUX/Local/LocalUDP/PingPong/Transmitter $ make
g++ -DLINUX -I. -I../../../../../../src -std=c++11 Transmitter.cpp -o Transmitter
pi@raspberrypi:~/PJON/examples/LINUX/Local/LocalUDP/PingPong/Transmitter $ ./Transmitter
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
^C
pi@raspberrypi:~/PJON/examples/LINUX/Local/LocalUDP/PingPong/Transmitter $ cd ..
pi@raspberrypi:~/PJON/examples/LINUX/Local/LocalUDP/PingPong $ cd Receiver/
pi@raspberrypi:~/PJON/examples/LINUX/Local/LocalUDP/PingPong/Receiver $ make
g++ -DLINUX -I. -I../../../../../../src -std=c++11 Receiver.cpp -o Receiver
pi@raspberrypi:~/PJON/examples/LINUX/Local/LocalUDP/PingPong/Receiver $ ./Receiver
PING/s: 0
PING/s: 1
PING/s: 0
PING/s: 1
PING/s: 0
PING/s: 1
PING/s: 0
PING/s: 1
PING/s: 0
PING/s: 1
PING/s: 0
PING/s: 1
PING/s: 0
PING/s: 0
^C
pi@raspberrypi:~/PJON/examples/LINUX/Local/LocalUDP/PingPong/Receiver $

MacOS X

xlfe@mbp ~ (master)$ git clone https://github.com/gioblu/PJON.git
Cloning into 'PJON'...
remote: Counting objects: 11962, done.
remote: Compressing objects: 100% (69/69), done.
remote: Total 11962 (delta 38), reused 67 (delta 25), pack-reused 11864
Receiving objects: 100% (11962/11962), 4.13 MiB | 423.00 KiB/s, done.
Resolving deltas: 100% (6627/6627), done.
xlfe@mbp ~ (master)$ cd PJON/examples/LINUX/Local/LocalUDP/PingPong/Receiver/
xlfe@mbp ~/PJON/examples/LINUX/Local/LocalUDP/PingPong/Receiver (master)$ make
g++ -DLINUX -I. -I../../../../../../src -std=c++11 Receiver.cpp -o Receiver
xlfe@mbp ~/PJON/examples/LINUX/Local/LocalUDP/PingPong/Receiver (master)$ ./Receiver
PING/s: 0
PING/s: 0
PING/s: 0
PING/s: 0
PING/s: 0
PING/s: 0
PING/s: 0
PING/s: 0
PING/s: 0
PING/s: 0
PING/s: 0
^C
xlfe@mbp ~/PJON/examples/LINUX/Local/LocalUDP/PingPong/Receiver (master)$ cd ../Transmitter/
xlfe@mbp ~/PJON/examples/LINUX/Local/LocalUDP/PingPong/Transmitter (master)$ make
g++ -DLINUX -I. -I../../../../../../src -std=c++11 Transmitter.cpp -o Transmitter
xlfe@mbp ~/PJON/examples/LINUX/Local/LocalUDP/PingPong/Transmitter (master)$ ./Transmitter
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
PONG/s: 0
^C
xlfe@mbp ~/PJON/examples/LINUX/Local/LocalUDP/PingPong/Transmitter (master)$
@fredilarsen

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fredilarsen commented Jul 16, 2018

Great to see that it builds on Mac as well.

Here are a few points that could be tested:

  1. Using wired Ethernet instead of WiFi -- is it the same behavior?
  2. Do you have another Mac or PC or Arduino with Ethernet shield available to test without the RPI? If all is perfect in both directions between two computers, this confirms Mac support, which is nice, and points a finger on the RPI.
@xlfe

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xlfe commented Jul 17, 2018

  1. I can't easily test wired support sorry
  2. No I don't have another machine to test with sorry

But.... when I run wireshark on the Mac I can see the broadcast packets coming in from the Pi - its just that PJON never sees them to respond to... So they are definitely "arriving at the Mac"

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fredilarsen commented Jul 19, 2018

Unfortunately I am in the same boat, lacking hardware that you are using. I do not have a Mac or a RPI (I never had a use for the graphics part, so I have been using other devices). I can try to simulate the Mac with a FreeBSD VMWare VM, and will have to get a RPI for test purposes.

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xlfe commented Jul 19, 2018

Okay - sorry for wasting everyone's time.

My firewall was silently dropping the packets with two weird features

1: The packets made it to Wireshark but not to PJON
2: Disabling the firewall only resolved the issue if I restarted the PJON ./Receiver process

So, I did test turning off the firewall before posting the issue, but I obviously did not restart the ./Receiver after turning off the firewall (I just had it running, no packets, firewall off, still no packets and therefore assumed it was not the firewall)!

I think you can close this issue...., and know that your code works on Mac OS X!

@xlfe xlfe closed this Jul 19, 2018

@fredilarsen

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fredilarsen commented Jul 19, 2018

Great news! Thanks for the feedback.

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