> there's a pr_type and a pr_protocol in teh protosw struct.  but i
> cannot seem to find what values of those entries correspond to what
> protocols (TCP/UDP/ICMP).

Are you sure you want to, that you shouldn't really be testing the
socket type (eg, SOCK_STREAM for TCP)?

If you really want the protocol values, look at in_proto.c and you'll
see that the pr_protocol values are things like IPPROTO_UDP and
IPPROTO_TCP, which come from <netinet/in.h>.

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