Qeltaras wrote:
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@
You likely ran into a hash key collision with your ETH_P_CUST protocol.
RTnet uses a rather simple hash mechanism to demultiplex incoming
Ethernet frames to the corresponding protocol handlers: the last n bits
of the protocol ID select the slot, where n is currently 6 (there are up
to 64 protocol slots available, see MAX_RT_PROTOCOLS define). And there
can only be one listener registered per slot.
You have two simple options (there are always more complex ones...):
* select a slightly different value for ETH_P_CUST
* increase MAX_RT_PROTOCOLS, and thus the hash key space
Jan
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