On Tue, May 09, 2006 at 04:02:27PM -0400, Andrew Gallatin wrote:
<SNIP!>
> If yes, then is there a simple, fast way to determine if a packet
> which winds up in the transmit routine of a GLDv2 device driver is a
> UDP over IPv6 packet? The IPv6 test is simple enough, but is there
> already code I can access in a driver to walk the IPv6 headers to see
> if the packet is UDP?
I believe it's a private interface, so it's not stable:
extern boolean_t ip_hdr_length_nexthdr_v6(mblk_t *, ip6_t *,
uint16_t *, uint8_t **);
Where the uint8_t ** gets pointed to the byte indicating the terminal IPv6
header.
You should probably treat those as slow-path, optimizing for ip6_nexthdr ==
UDP. (I'm sure you knew that already, though!)
Dan
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