trill_node_lookup
adj = trill_node_lookup(tip, adj_nick);
if ((dest = trill_node_lookup(tip, egressnick)) == NULL)
((adj = trill_node_lookup(tip, adjnick)) == NULL))
if ((dest = trill_node_lookup(tip, trillhdr->th_egressnick)) == NULL)
if ((adj = trill_node_lookup(tip, adjnick)) == NULL)
if ((source = trill_node_lookup(tip, trillhdr->th_ingressnick)) == NULL)
static trill_node_t *trill_node_lookup(trill_inst_t *, uint16_t);
if ((self = trill_node_lookup(tip, ournick)) == NULL)