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ipv6: tcp: fix TCLASS value in ACK messages sent from TIME_WAIT

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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:
Eric Dumazet
2011-10-27 00:44:35 -04:00
committed by David S. Miller
parent 138c4ae9cf
commit b903d324be
8 changed files with 19 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
net/ipv6/tcp_ipv6.c
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@@ -513,7 +513,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
__tcp_v6_send_check(skb, &treq->loc_addr, &treq->rmt_addr);
ipv6_addr_copy(&fl6.daddr, &treq->rmt_addr);
err = ip6_xmit(sk, skb, &fl6, opt);
err = ip6_xmit(sk, skb, &fl6, opt, np->tclass);
err = net_xmit_eval(err);
}
@@ -979,7 +979,7 @@ static int tcp6_gro_complete(struct sk_buff *skb)
}
static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
u32 ts, struct tcp_md5sig_key *key, int rst)
u32 ts, struct tcp_md5sig_key *key, int rst, u8 tclass)
{
const struct tcphdr *th = tcp_hdr(skb);
struct tcphdr *t1;
@@ -1060,7 +1060,7 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL, false);
if (!IS_ERR(dst)) {
skb_dst_set(buff, dst);
ip6_xmit(ctl_sk, buff, &fl6, NULL);
ip6_xmit(ctl_sk, buff, &fl6, NULL, tclass);
TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
if (rst)
TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS);
@@ -1093,13 +1093,13 @@ 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, key, 1);
tcp_v6_send_response(skb, seq, ack_seq, 0, 0, key, 1, 0);
}
static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 ts,
struct tcp_md5sig_key *key)
struct tcp_md5sig_key *key, u8 tclass)
{
tcp_v6_send_response(skb, seq, ack, win, ts, key, 0);
tcp_v6_send_response(skb, seq, ack, win, ts, key, 0, tclass);
}
static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb)
@@ -1109,7 +1109,8 @@ 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,
tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw));
tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw),
tw->tw_tclass);
inet_twsk_put(tw);
}
@@ -1118,7 +1119,7 @@ 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, req->ts_recent,
tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr));
tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr), 0);
}