diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/tcp.h | 1 | ||||
| -rw-r--r-- | include/net/tcp.h | 11 |
2 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h index e64f4c67d0e..531ede8006d 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -282,6 +282,7 @@ struct tcp_request_sock { #endif u32 rcv_isn; u32 snt_isn; + u32 snt_synack; /* synack sent time */ }; static inline struct tcp_request_sock *tcp_rsk(const struct request_sock *req) diff --git a/include/net/tcp.h b/include/net/tcp.h index cda30ea354a..149a415d1e0 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -122,7 +122,13 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo); #endif #define TCP_RTO_MAX ((unsigned)(120*HZ)) #define TCP_RTO_MIN ((unsigned)(HZ/5)) -#define TCP_TIMEOUT_INIT ((unsigned)(3*HZ)) /* RFC 1122 initial RTO value */ +#define TCP_TIMEOUT_INIT ((unsigned)(1*HZ)) /* RFC2988bis initial RTO value */ +#define TCP_TIMEOUT_FALLBACK ((unsigned)(3*HZ)) /* RFC 1122 initial RTO value, now + * used as a fallback RTO for the + * initial data transmission if no + * valid RTT sample has been acquired, + * most likely due to retrans in 3WHS. + */ #define TCP_RESOURCE_PROBE_INTERVAL ((unsigned)(HZ/2U)) /* Maximal interval between probes * for local resources. @@ -295,7 +301,7 @@ static inline void tcp_synq_overflow(struct sock *sk) static inline int tcp_synq_no_recent_overflow(const struct sock *sk) { unsigned long last_overflow = tcp_sk(sk)->rx_opt.ts_recent_stamp; - return time_after(jiffies, last_overflow + TCP_TIMEOUT_INIT); + return time_after(jiffies, last_overflow + TCP_TIMEOUT_FALLBACK); } extern struct proto tcp_prot; @@ -508,6 +514,7 @@ extern void tcp_initialize_rcv_mss(struct sock *sk); extern int tcp_mtu_to_mss(struct sock *sk, int pmtu); extern int tcp_mss_to_mtu(struct sock *sk, int mss); extern void tcp_mtup_init(struct sock *sk); +extern void tcp_valid_rtt_meas(struct sock *sk, u32 seq_rtt); static inline void tcp_bound_rto(const struct sock *sk) { |