ip_finish_output2() what happens in this part of code

["Adam Flizikowski" <adam_fli@poczta.onet.pl>]

Helo,


could someone please explain what is this code (from
ip_output.c::ip_finish_output2) exactly for...


162         struct dst_entry *dst = skb->dst;
163         struct hh_cache *hh = dst->hh;     << what is this for ???

..

169         if (hh) {
170                 read_lock_bh(&hh->hh_lock);
171                 memcpy(skb->data - 16, hh->hh_data, 16);
172                 read_unlock_bh(&hh->hh_lock);
173                 skb_push(skb, hh->hh_len);
174                 return hh->hh_output(skb);
175         } else if (dst->neighbour)
176                 return dst->neighbour->output(skb);

thanks in advance

adam

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