diff options
| author | Eric Dumazet <edumazet@google.com> | 2025-03-01 20:14:20 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-03-03 15:44:19 -0800 |
| commit | a11a791ca81e5cd9bf2d48e1368d836bc53f00ca (patch) | |
| tree | cca14f4b9b2cd126085ad8d0e004aa95d55673ba /net/ipv4/tcp_minisocks.c | |
| parent | e34100c2ecbb79a7d69474eb2f58545bb9926a5f (diff) | |
tcp: add four drop reasons to tcp_check_req()
Use two existing drop reasons in tcp_check_req():
- TCP_RFC7323_PAWS
- TCP_OVERWINDOW
Add two new ones:
- TCP_RFC7323_TSECR (corresponds to LINUX_MIB_TSECRREJECTED)
- TCP_LISTEN_OVERFLOW (when a listener accept queue is full)
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Jason Xing <kerneljasonxing@gmail.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250301201424.2046477-3-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4/tcp_minisocks.c')
| -rw-r--r-- | net/ipv4/tcp_minisocks.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c index 46c86c4f80e9..ba4a5d7f251d 100644 --- a/net/ipv4/tcp_minisocks.c +++ b/net/ipv4/tcp_minisocks.c @@ -809,10 +809,15 @@ struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb, LINUX_MIB_TCPACKSKIPPEDSYNRECV, &tcp_rsk(req)->last_oow_ack_time)) req->rsk_ops->send_ack(sk, skb, req); - if (paws_reject) + if (paws_reject) { + SKB_DR_SET(*drop_reason, TCP_RFC7323_PAWS); NET_INC_STATS(sock_net(sk), LINUX_MIB_PAWSESTABREJECTED); - else if (tsecr_reject) + } else if (tsecr_reject) { + SKB_DR_SET(*drop_reason, TCP_RFC7323_TSECR); NET_INC_STATS(sock_net(sk), LINUX_MIB_TSECRREJECTED); + } else { + SKB_DR_SET(*drop_reason, TCP_OVERWINDOW); + } return NULL; } @@ -882,6 +887,7 @@ struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb, return inet_csk_complete_hashdance(sk, child, req, own_req); listen_overflow: + SKB_DR_SET(*drop_reason, TCP_LISTEN_OVERFLOW); if (sk != req->rsk_listener) __NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMIGRATEREQFAILURE); |