diff options
| author | Eric Dumazet <edumazet@google.com> | 2019-09-24 08:01:16 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-09-27 12:05:02 +0200 |
| commit | f6c0f5d209fa80eb808e08aa4206f6e264041ef6 (patch) | |
| tree | a3c9c3a820ff3b8cc28671d498fad022142f74ff /net/ipv6/tcp_ipv6.c | |
| parent | e9a5dceee56cb527a3498f1a59bd8726baa1e717 (diff) | |
| download | linux-f6c0f5d209fa80eb808e08aa4206f6e264041ef6.tar.bz2 | |
tcp: honor SO_PRIORITY in TIME_WAIT state
ctl packets sent on behalf of TIME_WAIT sockets currently
have a zero skb->priority, which can cause various problems.
In this patch we :
- add a tw_priority field in struct inet_timewait_sock.
- populate it from sk->sk_priority when a TIME_WAIT is created.
- For IPv4, change ip_send_unicast_reply() and its two
callers to propagate tw_priority correctly.
ip_send_unicast_reply() no longer changes sk->sk_priority.
- For IPv6, make sure TIME_WAIT sockets pass their tw_priority
field to tcp_v6_send_response() and tcp_v6_send_ack().
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 5f557bf27da2..e3d9f4559c99 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -995,8 +995,10 @@ static void tcp_v6_send_reset(const struct sock *sk, struct sk_buff *skb) label = ip6_flowlabel(ipv6h); priority = sk->sk_priority; } - if (sk->sk_state == TCP_TIME_WAIT) + if (sk->sk_state == TCP_TIME_WAIT) { label = cpu_to_be32(inet_twsk(sk)->tw_flowlabel); + priority = inet_twsk(sk)->tw_priority; + } } else { if (net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_TCP_RESET) label = ip6_flowlabel(ipv6h); @@ -1029,7 +1031,7 @@ static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb) tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale, tcp_time_stamp_raw() + tcptw->tw_ts_offset, tcptw->tw_ts_recent, tw->tw_bound_dev_if, tcp_twsk_md5_key(tcptw), - tw->tw_tclass, cpu_to_be32(tw->tw_flowlabel), 0); + tw->tw_tclass, cpu_to_be32(tw->tw_flowlabel), tw->tw_priority); inet_twsk_put(tw); } |