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ipv6: tcp: fix TCLASS value in ACK messages sent from TIME_WAIT
commit 66b13d99d9
(ipv4: tcp: fix TOS value in ACK messages sent from
TIME_WAIT) fixed IPv4 only.
This part is for the IPv6 side, adding a tclass param to ip6_xmit()
We alias tw_tclass and tw_tos, if socket family is INET6.
[ if sockets is ipv4-mapped, only IP_TOS socket option is used to fill
TOS field, TCLASS is not taken into account ]
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
138c4ae9cf
commit
b903d324be
8 changed files with 19 additions and 18 deletions
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@ -134,6 +134,7 @@ struct inet_timewait_sock {
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struct inet_bind_bucket *tw_tb;
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struct hlist_node tw_death_node;
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};
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#define tw_tclass tw_tos
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static inline void inet_twsk_add_node_rcu(struct inet_timewait_sock *tw,
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struct hlist_nulls_head *list)
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@ -486,7 +486,8 @@ extern int ip6_rcv_finish(struct sk_buff *skb);
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extern int ip6_xmit(struct sock *sk,
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struct sk_buff *skb,
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struct flowi6 *fl6,
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struct ipv6_txoptions *opt);
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struct ipv6_txoptions *opt,
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int tclass);
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extern int ip6_nd_hdr(struct sock *sk,
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struct sk_buff *skb,
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@ -271,7 +271,7 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
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&ireq6->loc_addr,
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&ireq6->rmt_addr);
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ipv6_addr_copy(&fl6.daddr, &ireq6->rmt_addr);
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err = ip6_xmit(sk, skb, &fl6, opt);
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err = ip6_xmit(sk, skb, &fl6, opt, np->tclass);
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err = net_xmit_eval(err);
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}
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@ -326,7 +326,7 @@ static void dccp_v6_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb)
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dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL, false);
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if (!IS_ERR(dst)) {
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skb_dst_set(skb, dst);
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ip6_xmit(ctl_sk, skb, &fl6, NULL);
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ip6_xmit(ctl_sk, skb, &fl6, NULL, 0);
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DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
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DCCP_INC_STATS_BH(DCCP_MIB_OUTRSTS);
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return;
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@ -345,6 +345,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo)
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tw6 = inet6_twsk((struct sock *)tw);
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ipv6_addr_copy(&tw6->tw_v6_daddr, &np->daddr);
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ipv6_addr_copy(&tw6->tw_v6_rcv_saddr, &np->rcv_saddr);
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tw->tw_tclass = np->tclass;
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tw->tw_ipv6only = np->ipv6only;
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}
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#endif
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@ -248,7 +248,7 @@ int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused)
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/* Restore final destination back after routing done */
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ipv6_addr_copy(&fl6.daddr, &np->daddr);
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res = ip6_xmit(sk, skb, &fl6, np->opt);
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res = ip6_xmit(sk, skb, &fl6, np->opt, np->tclass);
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rcu_read_unlock();
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return res;
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}
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@ -180,7 +180,7 @@ int ip6_output(struct sk_buff *skb)
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*/
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int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
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struct ipv6_txoptions *opt)
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struct ipv6_txoptions *opt, int tclass)
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{
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struct net *net = sock_net(sk);
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struct ipv6_pinfo *np = inet6_sk(sk);
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@ -190,7 +190,6 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
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u8 proto = fl6->flowi6_proto;
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int seg_len = skb->len;
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int hlimit = -1;
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int tclass = 0;
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u32 mtu;
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if (opt) {
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@ -228,10 +227,8 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
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/*
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* Fill in the IPv6 header
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*/
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if (np) {
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tclass = np->tclass;
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if (np)
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hlimit = np->hop_limit;
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}
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if (hlimit < 0)
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hlimit = ip6_dst_hoplimit(dst);
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@ -513,7 +513,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
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__tcp_v6_send_check(skb, &treq->loc_addr, &treq->rmt_addr);
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ipv6_addr_copy(&fl6.daddr, &treq->rmt_addr);
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err = ip6_xmit(sk, skb, &fl6, opt);
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err = ip6_xmit(sk, skb, &fl6, opt, np->tclass);
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err = net_xmit_eval(err);
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}
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@ -979,7 +979,7 @@ static int tcp6_gro_complete(struct sk_buff *skb)
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}
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static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
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u32 ts, struct tcp_md5sig_key *key, int rst)
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u32 ts, struct tcp_md5sig_key *key, int rst, u8 tclass)
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{
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const struct tcphdr *th = tcp_hdr(skb);
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struct tcphdr *t1;
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@ -1060,7 +1060,7 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
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dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL, false);
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if (!IS_ERR(dst)) {
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skb_dst_set(buff, dst);
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ip6_xmit(ctl_sk, buff, &fl6, NULL);
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ip6_xmit(ctl_sk, buff, &fl6, NULL, tclass);
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TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
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if (rst)
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TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS);
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@ -1093,13 +1093,13 @@ static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb)
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ack_seq = ntohl(th->seq) + th->syn + th->fin + skb->len -
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(th->doff << 2);
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tcp_v6_send_response(skb, seq, ack_seq, 0, 0, key, 1);
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tcp_v6_send_response(skb, seq, ack_seq, 0, 0, key, 1, 0);
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}
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static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 ts,
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struct tcp_md5sig_key *key)
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struct tcp_md5sig_key *key, u8 tclass)
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{
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tcp_v6_send_response(skb, seq, ack, win, ts, key, 0);
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tcp_v6_send_response(skb, seq, ack, win, ts, key, 0, tclass);
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}
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static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb)
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@ -1109,7 +1109,8 @@ static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb)
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tcp_v6_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
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tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale,
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tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw));
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tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw),
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tw->tw_tclass);
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inet_twsk_put(tw);
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}
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@ -1118,7 +1119,7 @@ static void tcp_v6_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
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struct request_sock *req)
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{
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tcp_v6_send_ack(skb, tcp_rsk(req)->snt_isn + 1, tcp_rsk(req)->rcv_isn + 1, req->rcv_wnd, req->ts_recent,
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tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr));
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tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr), 0);
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}
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@ -243,7 +243,7 @@ static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport)
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if (!(transport->param_flags & SPP_PMTUD_ENABLE))
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skb->local_df = 1;
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return ip6_xmit(sk, skb, &fl6, np->opt);
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return ip6_xmit(sk, skb, &fl6, np->opt, np->tclass);
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}
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/* Returns the dst cache entry for the given source and destination ip
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