spfack.C:

When a LSA ACK is received with FT-bit = 1 from a node, add the node as a child to the parent-children table. Otherwise, delete the node from the list of children if it is already present.

rtid_t origin;

origin = ntoh32(hdr->ls_org);

if((hdr->ls_opts & 128) == 128){

ospf->add_child_pctable(origin, this);

}

else{

ospf->delete_child_pctable(origin, this);

}