From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wangyufen Subject: [PATCH net-next v3 2/2] net: tcp_ipv6 policy route issue Date: Mon, 24 Mar 2014 14:25:22 +0800 Message-ID: <1395642322-9404-2-git-send-email-wangyufen@huawei.com> References: <1395642322-9404-1-git-send-email-wangyufen@huawei.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Wang Yufen To: , Return-path: Received: from szxga02-in.huawei.com ([119.145.14.65]:38017 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751447AbaCXG2I (ORCPT ); Mon, 24 Mar 2014 02:28:08 -0400 In-Reply-To: <1395642322-9404-1-git-send-email-wangyufen@huawei.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Wang Yufen The issue raises when adding policy route, specify a particular NIC as oif, the policy route did not take effect. The reason is that fl6.oif is not set and route map failed. From the tcp_v6_send_response function, if the binding address is linklocal, fl6.oif is set, but not for global address. Signed-off-by: Wang Yufen --- net/ipv6/tcp_ipv6.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index f6f38fe..066f36f 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -726,7 +726,7 @@ static const struct tcp_request_sock_ops tcp_request_sock_ipv6_ops = { #endif static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win, - u32 tsval, u32 tsecr, + u32 tsval, u32 tsecr, int oif, struct tcp_md5sig_key *key, int rst, u8 tclass, u32 label) { @@ -802,6 +802,8 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win, fl6.flowi6_oif = inet6_iif(skb); fl6.fl6_dport = t1->dest; fl6.fl6_sport = t1->source; + if (fl6.flowi6_oif == 0) + fl6.flowi6_oif = oif; security_skb_classify_flow(skb, flowi6_to_flowi(&fl6)); /* Pass a socket to ip6_dst_lookup either it is for RST @@ -833,6 +835,7 @@ static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb) int genhash; struct sock *sk1 = NULL; #endif + int oif; if (th->rst) return; @@ -876,7 +879,8 @@ static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb) ack_seq = ntohl(th->seq) + th->syn + th->fin + skb->len - (th->doff << 2); - tcp_v6_send_response(skb, seq, ack_seq, 0, 0, 0, key, 1, 0, 0); + oif = sk ? sk->sk_bound_dev_if : 0; + tcp_v6_send_response(skb, seq, ack_seq, 0, 0, 0, oif, key, 1, 0, 0); #ifdef CONFIG_TCP_MD5SIG release_sk1: @@ -888,11 +892,11 @@ release_sk1: } static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, - u32 win, u32 tsval, u32 tsecr, + u32 win, u32 tsval, u32 tsecr, int oif, struct tcp_md5sig_key *key, u8 tclass, u32 label) { - tcp_v6_send_response(skb, seq, ack, win, tsval, tsecr, key, 0, tclass, + tcp_v6_send_response(skb, seq, ack, win, tsval, tsecr, oif, key, 0, tclass, label); } @@ -904,7 +908,7 @@ static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb) tcp_v6_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt, tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale, tcp_time_stamp + tcptw->tw_ts_offset, - tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw), + tcptw->tw_ts_recent, tw->tw_bound_dev_if, tcp_twsk_md5_key(tcptw), tw->tw_tclass, (tw->tw_flowlabel << 12)); inet_twsk_put(tw); @@ -914,7 +918,7 @@ static void tcp_v6_reqsk_send_ack(struct sock *sk, struct sk_buff *skb, struct request_sock *req) { tcp_v6_send_ack(skb, tcp_rsk(req)->snt_isn + 1, tcp_rsk(req)->rcv_isn + 1, - req->rcv_wnd, tcp_time_stamp, req->ts_recent, + req->rcv_wnd, tcp_time_stamp, req->ts_recent, sk->sk_bound_dev_if, tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr), 0, 0); } -- 1.7.12