I've been using a Duo with an SBC cubieboard2 along with usb sharing. It works, but being it's only 100Mb eth0, you can guess the rest...
The RPi is limited to USB speeds (480Mbs/) via ethernet, so thought... I'd look for something else that can exceed this as my network is sound.
ASUS Linux tinkerboard 4.19.28-rockchip #5.77 SMP PREEMPT Mon Mar 11 22:54:26 GMT 2019 armv7l GNU/Linux is where I ended up.
I'm still working on the USB sharing, It runs, but something is still not quite right as SDRUno hangs.
I suspect this isn't helping?
Mar 13 00:14:12 tinkerboard kernel: usb 1-220.127.116.11: reset high-speed USB device number 11 using dwc2
Mar 13 00:14:13 tinkerboard kernel: tusbd: usbd_stub_reset: usb_reset_device returned 0
Moving on, I thought I'd give RSP_TCP a go.. but after installing the api kit.. whatever I do, RSP_TCP/Soapy etc. if barfs.. see below.
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-- LIBSDRPLAY_INCLUDE_DIRS - /usr/local/include
-- LIBSDRPLAY_LIBRARIES - /usr/local/lib/libmirsdrapi-rsp.so
-- Configuring done
-- Generating done
-- Build files have been written to: /opt/RSPTCPServer/build
all good and groovy... we think?
so the linker goes to work...
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user@tinkerboard:/opt/RSPTCPServer/build$ sudo make
[ 50%] Linking C executable rsp_tcp
/usr/local/lib/libmirsdrapi-rsp.so: file not recognized: File format not recognized
collect2: error: ld returned 1 exit status
CMakeFiles/rsp_tcp.dir/build.make:95: recipe for target 'rsp_tcp' failed
make: *** [rsp_tcp] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/rsp_tcp.dir/all' failed
make: *** [CMakeFiles/rsp_tcp.dir/all] Error 2
Makefile:149: recipe for target 'all' failed
make: *** [all] Error 2