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-rw-r--r--src/vnet/tcp/tcp.c65
1 files changed, 28 insertions, 37 deletions
diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c
index 7712ade4416..4a0ffc137e5 100644
--- a/src/vnet/tcp/tcp.c
+++ b/src/vnet/tcp/tcp.c
@@ -1195,29 +1195,6 @@ tcp_session_cal_goal_size (tcp_connection_t * tc)
return goal_size > tc->snd_mss ? goal_size : tc->snd_mss;
}
-/**
- * Compute maximum segment size for session layer.
- *
- * Since the result needs to be the actual data length, it first computes
- * the tcp options to be used in the next burst and subtracts their
- * length from the connection's snd_mss.
- */
-static u16
-tcp_session_send_mss (transport_connection_t * trans_conn)
-{
- tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
-
- /* Ensure snd_mss does accurately reflect the amount of data we can push
- * in a segment. This also makes sure that options are updated according to
- * the current state of the connection. */
- tcp_update_burst_snd_vars (tc);
-
- if (PREDICT_FALSE (tc->cfg_flags & TCP_CFG_F_TSO))
- return tcp_session_cal_goal_size (tc);
-
- return tc->snd_mss;
-}
-
always_inline u32
tcp_round_snd_space (tcp_connection_t * tc, u32 snd_space)
{
@@ -1281,23 +1258,39 @@ tcp_snd_space (tcp_connection_t * tc)
return tcp_snd_space_inline (tc);
}
-static u32
-tcp_session_send_space (transport_connection_t * trans_conn)
+static int
+tcp_session_send_params (transport_connection_t * trans_conn,
+ transport_send_params_t * sp)
{
tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
- return clib_min (tcp_snd_space_inline (tc),
- tc->snd_wnd - (tc->snd_nxt - tc->snd_una));
-}
-static u32
-tcp_session_tx_fifo_offset (transport_connection_t * trans_conn)
-{
- tcp_connection_t *tc = (tcp_connection_t *) trans_conn;
+ /* Ensure snd_mss does accurately reflect the amount of data we can push
+ * in a segment. This also makes sure that options are updated according to
+ * the current state of the connection. */
+ tcp_update_burst_snd_vars (tc);
- ASSERT (seq_geq (tc->snd_nxt, tc->snd_una));
+ if (PREDICT_FALSE (tc->cfg_flags & TCP_CFG_F_TSO))
+ sp->snd_mss = tcp_session_cal_goal_size (tc);
+ else
+ sp->snd_mss = tc->snd_mss;
+
+ sp->snd_space = clib_min (tcp_snd_space_inline (tc),
+ tc->snd_wnd - (tc->snd_nxt - tc->snd_una));
+ ASSERT (seq_geq (tc->snd_nxt, tc->snd_una));
/* This still works if fast retransmit is on */
- return (tc->snd_nxt - tc->snd_una);
+ sp->tx_offset = tc->snd_nxt - tc->snd_una;
+
+ sp->flags = 0;
+ if (!tc->snd_wnd)
+ {
+ if (tcp_timer_is_active (tc, TCP_TIMER_PERSIST))
+ sp->flags = TRANSPORT_SND_F_DESCHED;
+ else
+ sp->flags = TRANSPORT_SND_F_POSTPONE;
+ }
+
+ return 0;
}
static void
@@ -1509,10 +1502,8 @@ const static transport_proto_vft_t tcp_proto = {
.close = tcp_session_close,
.cleanup = tcp_session_cleanup,
.reset = tcp_session_reset,
- .send_mss = tcp_session_send_mss,
- .send_space = tcp_session_send_space,
+ .send_params = tcp_session_send_params,
.update_time = tcp_update_time,
- .tx_fifo_offset = tcp_session_tx_fifo_offset,
.flush_data = tcp_session_flush_data,
.custom_tx = tcp_session_custom_tx,
.format_connection = format_tcp_session,