Sending sk_buffs without being tied to a struct sock

DISCUSSION Joshua Stewart 1 participant 1 message Jan 13, 2003 2 messages not in the archive

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Joshua Stewart

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2003-01-13 03:03 UTC #2 lore raw

At this point, if I call skb->dst->output() what should skb->data point to? A properly crafted IP packet? Checksummed and all? I shouldn't need any layer 2 info in my skb at all to use this solution, should I?

Thanks for the help. I think this will do the trick.

Quoted 22 lines · Patrick McHardy

Quoted 10 lines · Joshua Stewart
I'm trying to take "hand-built" sk_buffs with little more than some data and a dev member and push them to the NIC for transmission. I would like to simply give them to dev_queue_xmit. Does anybody know what state I should have them in before handing them to dev_queue_xmit? Should skb->data point to the start of a MAC header or an IP header?
Also, given an IP address in skb->nh.iph->daddr, what's the easiest way to get the appropriate MAC address?
use ip_route_output_key() and then skb->dst->output(), that way it will work on all media and you don't have to care about l2 resolving at all.
Patrick
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