diff options
| -rw-r--r-- | net/dccp/ccids/ccid3.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c index 86c109e2f2cd..0804b3e435c8 100644 --- a/net/dccp/ccids/ccid3.c +++ b/net/dccp/ccids/ccid3.c @@ -962,7 +962,7 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb) struct dccp_rx_hist_entry *packet; struct timeval now; u8 win_count; - u32 p_prev; + u32 p_prev, r_sample, t_elapsed; int ins; if (hcrx == NULL) @@ -982,9 +982,23 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb) break; p_prev = hcrx->ccid3hcrx_rtt; do_gettimeofday(&now); - hcrx->ccid3hcrx_rtt = timeval_usecs(&now) - - (opt_recv->dccpor_timestamp_echo - - opt_recv->dccpor_elapsed_time) * 10; + timeval_sub_usecs(&now, opt_recv->dccpor_timestamp_echo * 10); + r_sample = timeval_usecs(&now); + t_elapsed = opt_recv->dccpor_elapsed_time * 10; + + if (unlikely(r_sample <= t_elapsed)) + LIMIT_NETDEBUG(KERN_WARNING + "%s: r_sample=%uus, t_elapsed=%uus\n", + __FUNCTION__, r_sample, t_elapsed); + else + r_sample -= t_elapsed; + + if (hcrx->ccid3hcrx_state == TFRC_RSTATE_NO_DATA) + hcrx->ccid3hcrx_rtt = r_sample; + else + hcrx->ccid3hcrx_rtt = (hcrx->ccid3hcrx_rtt * 9) / 10 + + r_sample / 10; + if (p_prev != hcrx->ccid3hcrx_rtt) ccid3_pr_debug("%s, New RTT=%luus, elapsed time=%u\n", dccp_role(sk), hcrx->ccid3hcrx_rtt, |