I create the sochet with the functuin socket_rt

sock = socket_rt( PF_PACKET, SOCK_DGRAM, htons( ETH_P_CUST));
the system returne:

Socket error: -99

packet_if_rtai.o: init_module: Operation not permitted 
Hint: insmod errors can be caused by incorrect module parameters,
including invalid IO, or IRQ parameters.

If I remouve the htons i don't have any problem...
You can tell me wath protcol are supported?
thanks 
   Nicol@


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