ip: pass tos into ip_build_and_send_pkt()

This commit adds tos as a new passed in parameter to
ip_build_and_send_pkt() which will be used in the later commit.
This is a pure restructure and does not have any functional change.

Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dccp/ipv4.c

@@ -495,7 +495,8 @@ static int dccp_v4_send_response(const struct sock *sk, struct request_sock *req
 		rcu_read_lock();
 		err = ip_build_and_send_pkt(skb, sk, ireq->ir_loc_addr,
 					    ireq->ir_rmt_addr,
-					    rcu_dereference(ireq->ireq_opt));
+					    rcu_dereference(ireq->ireq_opt),
+					    inet_sk(sk)->tos);
 		rcu_read_unlock();
 		err = net_xmit_eval(err);
 	}
@@ -537,7 +538,8 @@ static void dccp_v4_ctl_send_reset(const struct sock *sk, struct sk_buff *rxskb)
 	local_bh_disable();
 	bh_lock_sock(ctl_sk);
 	err = ip_build_and_send_pkt(skb, ctl_sk,
-				    rxiph->daddr, rxiph->saddr, NULL);
+				    rxiph->daddr, rxiph->saddr, NULL,
+				    inet_sk(ctl_sk)->tos);
 	bh_unlock_sock(ctl_sk);
 
 	if (net_xmit_eval(err) == 0) {