From 9494218fbae2f88bd3f9b887714734abfdf38bab Mon Sep 17 00:00:00 2001 From: Neal Cardwell Date: Thu, 28 Jun 2012 12:34:20 +0000 Subject: [PATCH] tcp: use inet6_csk_route_req() in tcp_v6_send_synack() With the recent change (earlier in this patch series) to set flowi6_oif to treq->iif in inet6_csk_route_req(), the dst lookup in these two functions is now identical, so tcp_v6_send_synack() can now just call inet6_csk_route_req(), to reduce code duplication and keep things closer to the IPv4 side, which is structured this way. Signed-off-by: Neal Cardwell Signed-off-by: David S. Miller --- net/ipv6/tcp_ipv6.c | 29 ++++++----------------------- 1 file changed, 6 insertions(+), 23 deletions(-) diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 4e5fa5f6ec6..d1db0caefdc 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -485,34 +485,17 @@ static int tcp_v6_send_synack(struct sock *sk, struct inet6_request_sock *treq = inet6_rsk(req); struct ipv6_pinfo *np = inet6_sk(sk); struct sk_buff * skb; - struct ipv6_txoptions *opt = NULL; - struct in6_addr * final_p, final; + struct ipv6_txoptions *opt = np->opt; struct flowi6 fl6; struct dst_entry *dst; - int err; - - memset(&fl6, 0, sizeof(fl6)); - fl6.flowi6_proto = IPPROTO_TCP; - fl6.daddr = treq->rmt_addr; - fl6.saddr = treq->loc_addr; - fl6.flowlabel = 0; - fl6.flowi6_oif = treq->iif; - fl6.flowi6_mark = sk->sk_mark; - fl6.fl6_dport = inet_rsk(req)->rmt_port; - fl6.fl6_sport = inet_rsk(req)->loc_port; - security_req_classify_flow(req, flowi6_to_flowi(&fl6)); - - opt = np->opt; - final_p = fl6_update_dst(&fl6, opt, &final); + int err = -ENOMEM; - dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false); - if (IS_ERR(dst)) { - err = PTR_ERR(dst); - dst = NULL; + dst = inet6_csk_route_req(sk, &fl6, req); + if (!dst) goto done; - } + skb = tcp_make_synack(sk, dst, req, rvp); - err = -ENOMEM; + if (skb) { __tcp_v6_send_check(skb, &treq->loc_addr, &treq->rmt_addr); -- 2.46.0