tcp: provide SYN headers for passive connections

[firefly-linux-kernel-4.4.55.git] / include / linux / tcp.h

diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 3b2911502a8cf4a6e3eaf721e0e0105937ad456e..e6fb5df22db1fb3a2a902581d958e6d4881b399b 100644 (file)
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -199,6 +199,7 @@ struct tcp_sock {
                syn_fastopen:1, /* SYN includes Fast Open option */
                syn_fastopen_exp:1,/* SYN includes Fast Open exp. option */
                syn_data_acked:1,/* data in SYN is acked by SYN-ACK */
+               save_syn:1,     /* Save headers of SYN packet */
                is_cwnd_limited:1;/* forward progress limited by snd_cwnd? */
        u32     tlp_high_seq;   /* snd_nxt at the time of TLP retransmit. */
 
@@ -326,6 +327,7 @@ struct tcp_sock {
         * socket. Used to retransmit SYNACKs etc.
         */
        struct request_sock *fastopen_rsk;
+       u32     *saved_syn;
 };
 
 enum tsq_flags {
@@ -393,4 +395,10 @@ static inline int fastopen_init_queue(struct sock *sk, int backlog)
        return 0;
 }
 
+static inline void tcp_saved_syn_free(struct tcp_sock *tp)
+{
+       kfree(tp->saved_syn);
+       tp->saved_syn = NULL;
+}
+
 #endif /* _LINUX_TCP_H */