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genode_c_api/usb: report iface class and protocol

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Enrich the device report with interface class and protocol information
for the current active setting of the device.

Fixes #4463.
This commit is contained in:
Josef Söntgen 2022-03-29 18:35:03 +02:00 committed by Christian Helmuth
parent 664676a2b4
commit 1dc92c49ed
1 changed files with 34 additions and 0 deletions
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34
repos/os/src/lib/genode_c_api/usb.cc
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@ -602,6 +602,40 @@ void ::Root::_report()
xml.attribute("bus", Value(Hex(d.bus)));
xml.attribute("dev", Value(Hex(d.dev)));
xml.attribute("class", Value(Hex(d.cla)));
Usb::Device_descriptor device_descr { };
Usb::Config_descriptor config_descr { };
if (!_callbacks->cfg_desc_fn(d.bus, d.dev,
(void*) &device_descr,
&config_descr))
return;
for (unsigned idx = 0; idx < config_descr.num_interfaces; idx++) {
int const num_altsetting = _callbacks->alt_settings_fn(d.bus, d.dev, idx);
if (num_altsetting < 0)
continue;
for (int adx = 0; adx < num_altsetting; adx++) {
int active = false;
Usb::Interface_descriptor iface_desc { };
if (_callbacks->iface_desc_fn(d.bus, d.dev, idx, adx,
(void*) &iface_desc,
sizeof (Usb::Interface_descriptor),
&active))
continue;
if (!active)
continue;
xml.node("interface", [&] {
xml.attribute("class", Value(Hex(iface_desc.iclass)));
xml.attribute("protocol", Value(Hex(iface_desc.iprotocol)));
});
}
}
});
});
});