From b1f0a0e99c58fbd7ea053ca36ba623718272b618 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Mon, 21 Dec 2015 21:29:24 +0100 Subject: net: add inet_sk_transparent() helper Avoids cluttering tcp_v4_send_reset when followup patch extends it to deal with timewait sockets. Suggested-by: Eric Dumazet Signed-off-by: Florian Westphal Acked-by: Eric Dumazet Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- include/net/request_sock.h | 2 +- include/net/tcp.h | 12 ++++++++++++ 2 files changed, 13 insertions(+), 1 deletion(-) (limited to 'include/net') diff --git a/include/net/request_sock.h b/include/net/request_sock.h index a0dde04eb178..f49759decb28 100644 --- a/include/net/request_sock.h +++ b/include/net/request_sock.h @@ -68,7 +68,7 @@ struct request_sock { u32 peer_secid; }; -static inline struct request_sock *inet_reqsk(struct sock *sk) +static inline struct request_sock *inet_reqsk(const struct sock *sk) { return (struct request_sock *)sk; } diff --git a/include/net/tcp.h b/include/net/tcp.h index 3077735b348d..f33fecf4e282 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1620,6 +1620,18 @@ static inline void tcp_highest_sack_combine(struct sock *sk, tcp_sk(sk)->highest_sack = new; } +/* This helper checks if socket has IP_TRANSPARENT set */ +static inline bool inet_sk_transparent(const struct sock *sk) +{ + switch (sk->sk_state) { + case TCP_TIME_WAIT: + return inet_twsk(sk)->tw_transparent; + case TCP_NEW_SYN_RECV: + return inet_rsk(inet_reqsk(sk))->no_srccheck; + } + return inet_sk(sk)->transparent; +} + /* Determines whether this is a thin stream (which may suffer from * increased latency). Used to trigger latency-reducing mechanisms. */ -- cgit v1.2.1