[refpolicy] what is a suitable type for /dev/cdc-wdm[01]

Dominick Grift dominick.grift at gmail.com
Mon Sep 26 05:27:35 CDT 2011


/dev/cdc-wdm[01] character device nodes are currently labeled type
device_t:

> # matchpathcon /dev/cdc-wdm0
> /dev/cdc-wdm0	system_u:object_r:device_t:s0

what would be suitable type for these devices?

> CDC Device Management (2 "devices") 
>  CDC Mobile Direct Line (1 "device") 
> 
> The first is supported by the cdc-wdm driver available in 2.6.29 
> (haven't checked exactly when it was added, but it is rather new).
>  It 
> will add two new devices you can send AT commands
> to /dev/cdc-wdm[01], 
> but not do any high speed data transfers over.  Quite useful, since
> the 
> three ACM devices are easily "lost" to GPS, SMS daemon and PPP. 
> 
> The CDC Mobile Direct Line is actually a masqueraded CDC Ethernet 
> device. Ericsson has provided a driver which is mostly a copy of 
> cdc_ether.c.  Nice feature to have, but I've not been able to measure 
> any speed advantages compared to PPP on ttyACM0.  Still, fun to play 
> with :-)

Also, why are ACM tty character device nodes labeled type tty_device_t
and not for example acmtty_device_t?

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 836 bytes
Desc: This is a digitally signed message part
Url : http://oss.tresys.com/pipermail/refpolicy/attachments/20110926/549fc39e/attachment.bin 


More information about the refpolicy mailing list