l2test: Send failed. Invalid argument(22)
Hi!
I'm trying to test (almost) my implementation of L2CAP. This is what i do:
$ ./l2test -s -N 20 -S 00:0A:3A:53:12:4A 00:80:37:16:30:8B
Unfortunetly, I get:
l2test[2445]: Connected [imtu 672, omtu 512, flush_to 65535] l2test[2445]: Sending ...
l2test[2445]: Send failed. Invalid argument(22)
No data is send. Just after L2CAP connection is established my module is receiving Disconnection Request packet.
Please, tell me, what does that "Invalid argument(22)" mean.
Best regards,
Przemek
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Marcel Holtmann
maintainerHi Przemek,
Quoted 7 lines
I'm trying to test (almost) my implementation of L2CAP. This is what i do:
$ ./l2test -s -N 20 -S 00:0A:3A:53:12:4A 00:80:37:16:30:8BUnfortunetly, I get:
Quoted 8 lines
l2test[2445]: Connected [imtu 672, omtu 512,
flush_to65535] l2test[2445]: Sending ...
l2test[2445]: Send failed. Invalid argument(22)No data is send. Just after L2CAP connection is established my module is receiving Disconnection Request packet.
Please, tell me, what does that "Invalid argument(22)" mean.
you are using BlueZ to test your own implementation of L2CAP. Sounds nice, but you already got all you need. Run hcidump and see what is going on the HCI level. If you are looking for the error code than check errno and the L2CAP source code. From a quick view it looks like your data is bigger than your MTU. L2CAP is sequential packet and not a stream.
Regards
Marcel
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Quoted 3 lines · Marcel Holtmann
From a quick view it looks like your
data is bigger than your MTU. L2CAP is sequential packet and not a stream.
That's right! I should have used -b option with l2test. Thank you vary much!
Best regards,
Przemek
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