msg_set_prevnode
msg_set_prevnode(buf_msg(d->skb), sugg_addr);
msg_set_prevnode(buf_msg(d->skb), tn->trial_addr);
msg_set_prevnode(buf_msg(d->skb), tn->trial_addr);
msg_set_prevnode(hdr, own_node);
msg_set_prevnode(msg, self);
msg_set_prevnode(m, own_node);
msg_set_prevnode(msg, tipc_own_addr(net));