Hi Marcel, hi list,
Does Bluetooth's RFCOMM protocol have ACKs and a sliding window, like
TCP? Is it possible for a sending application to block on send when
sending a large payload to a slow reading application?
I'm trying to debug a program I wrote using
socket(PF_BLUETOOTH,SOCK_STREAM,BTPROTO_RFCOMM). Where can I learn
more about decoding the output of `hcidump -X -V` especially as it
applies to traffic crossing this RFCOMM socket? I am particularly
interested in what to look for when chasing flow control and TCP-like
reliability.
Thanks for your time,
Jeff
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Hi Jeff,
> Does Bluetooth's RFCOMM protocol have ACKs and a sliding window, like
> TCP? Is it possible for a sending application to block on send when
> sending a large payload to a slow reading application?
the RFCOMM is using flow control only. There is no sliding window and
thus no real ACK mechanism.
> I'm trying to debug a program I wrote using
> socket(PF_BLUETOOTH,SOCK_STREAM,BTPROTO_RFCOMM). Where can I learn
> more about decoding the output of `hcidump -X -V` especially as it
> applies to traffic crossing this RFCOMM socket? I am particularly
> interested in what to look for when chasing flow control and TCP-like
> reliability.
Since RFCOMM also has an MTU, you will see the packets going over the
air and the granted credits from each side.
Regards
Marcel
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