if (tc->c_thread_index != vlib_get_thread_index ())
return 1;
- session_half_open_delete_notify (TRANSPORT_PROTO_TCP, tc->c_s_ho_handle);
+ session_half_open_delete_notify (&tc->connection);
wrk = tcp_get_worker (tc->c_thread_index);
tcp_timer_reset (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT_SYN);
tcp_half_open_connection_free (tc);
tcp_cleanup_req_t *req;
clib_time_type_t now;
- now = transport_time_now (tc->c_thread_index);
+ now = tcp_time_now_us (tc->c_thread_index);
clib_fifo_add2 (wrk->pending_cleanups, req);
req->connection_index = tc->c_c_index;
req->free_time = now + tcp_cfg.cleanup_time;
* 2) TIME_WAIT (active close) whereby after 2MSL the 2MSL timer triggers
* and cleanup is called.
*
- * N.B. Half-close connections are not supported
*/
void
tcp_connection_close (tcp_connection_t * tc)
}
}
+static void
+tcp_session_half_close (u32 conn_index, u32 thread_index)
+{
+ tcp_worker_ctx_t *wrk;
+ tcp_connection_t *tc;
+
+ tc = tcp_connection_get (conn_index, thread_index);
+ wrk = tcp_get_worker (tc->c_thread_index);
+
+ /* If the connection is not in ESTABLISHED state, ignore it */
+ if (tc->state != TCP_STATE_ESTABLISHED)
+ return;
+ if (!transport_max_tx_dequeue (&tc->connection))
+ tcp_send_fin (tc);
+ else
+ tc->flags |= TCP_CONN_FINPNDG;
+ tcp_connection_set_state (tc, TCP_STATE_FIN_WAIT_1);
+ /* Set a timer in case the peer stops responding. Otherwise the
+ * connection will be stuck here forever. */
+ ASSERT (tc->timers[TCP_TIMER_WAITCLOSE] == TCP_TIMER_HANDLE_INVALID);
+ tcp_timer_set (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE,
+ tcp_cfg.finwait1_time);
+}
+
static void
tcp_session_close (u32 conn_index, u32 thread_index)
{
/* We should have enough space for 40 bytes of options */
ASSERT (tc->snd_mss > 45);
- /* If we use timestamp option, account for it */
+ /* If we use timestamp option, account for it and make sure
+ * the options are 4-byte aligned */
if (tcp_opts_tstamp (&tc->rcv_opts))
- tc->snd_mss -= TCP_OPTION_LEN_TIMESTAMP;
+ tc->snd_mss -= TCP_OPTION_LEN_TIMESTAMP + 2 /* alignment */;
}
/**
* handshake may make it look as if time has flown in the opposite
* direction for us.
*/
- tcp_set_time_now (tcp_get_worker (vlib_get_thread_index ()));
+ tcp_update_time_now (tcp_get_worker (vlib_get_thread_index ()));
tcp_init_rcv_mss (tc);
tc->iss = tcp_generate_random_iss (tc);
tc->snd_una = tc->iss;
tc->snd_nxt = tc->iss + 1;
- tc->snd_una_max = tc->snd_nxt;
- tc->srtt = 100; /* 100 ms */
+ tc->srtt = 0.1 * THZ; /* 100 ms */
if (!tcp_cfg.csum_offload)
tc->cfg_flags |= TCP_CFG_F_NO_CSUM_OFFLOAD;
u32 __clib_unused thread_index = va_arg (*args, u32);
u32 verbose = va_arg (*args, u32);
tcp_connection_t *tc = tcp_listener_get (tci);
- s = format (s, "%-50U", format_tcp_connection_id, tc);
+ s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_tcp_connection_id, tc);
if (verbose)
- s = format (s, "%-15U", format_tcp_state, tc->state);
+ s = format (s, "%-" SESSION_CLI_STATE_LEN "U", format_tcp_state,
+ tc->state);
return s;
}
{
u32 tci = va_arg (*args, u32);
u32 __clib_unused thread_index = va_arg (*args, u32);
- tcp_connection_t *tc = tcp_half_open_connection_get (tci);
- return format (s, "%U", format_tcp_connection_id, tc);
+ u32 verbose = va_arg (*args, u32);
+ tcp_connection_t *tc;
+ u8 *state = 0;
+
+ tc = tcp_half_open_connection_get (tci);
+ if (tc->flags & TCP_CONN_HALF_OPEN_DONE)
+ state = format (state, "%s", "CLOSED");
+ else
+ state = format (state, "%U", format_tcp_state, tc->state);
+ s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_tcp_connection_id, tc);
+ if (verbose)
+ s = format (s, "%-" SESSION_CLI_STATE_LEN "v", state);
+ vec_free (state);
+ return s;
}
static transport_connection_t *
return &tc->connection;
}
+static int
+tcp_set_attribute (tcp_connection_t *tc, transport_endpt_attr_t *attr)
+{
+ int rv = 0;
+
+ switch (attr->type)
+ {
+ case TRANSPORT_ENDPT_ATTR_NEXT_OUTPUT_NODE:
+ tc->next_node_index = attr->next_output_node & 0xffffffff;
+ tc->next_node_opaque = attr->next_output_node >> 32;
+ break;
+ case TRANSPORT_ENDPT_ATTR_MSS:
+ tc->mss = attr->mss;
+ tc->snd_mss = clib_min (tc->snd_mss, tc->mss);
+ break;
+ case TRANSPORT_ENDPT_ATTR_FLAGS:
+ if (attr->flags & TRANSPORT_ENDPT_ATTR_F_CSUM_OFFLOAD)
+ tc->cfg_flags |= TCP_CFG_F_NO_CSUM_OFFLOAD;
+ else
+ tc->cfg_flags &= ~TCP_CFG_F_NO_CSUM_OFFLOAD;
+ if (attr->flags & TRANSPORT_ENDPT_ATTR_F_GSO)
+ {
+ if (!(tc->cfg_flags & TCP_CFG_F_TSO))
+ tcp_check_gso (tc);
+ tc->cfg_flags &= ~TCP_CFG_F_NO_TSO;
+ }
+ else
+ {
+ tc->cfg_flags |= TCP_CFG_F_NO_TSO;
+ tc->cfg_flags &= ~TCP_CFG_F_TSO;
+ }
+ if (attr->flags & TRANSPORT_ENDPT_ATTR_F_RATE_SAMPLING)
+ {
+ if (!(tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE))
+ tcp_bt_init (tc);
+ tc->cfg_flags |= TCP_CFG_F_RATE_SAMPLE;
+ }
+ else
+ {
+ if (tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE)
+ tcp_bt_cleanup (tc);
+ tc->cfg_flags &= ~TCP_CFG_F_RATE_SAMPLE;
+ }
+ break;
+ case TRANSPORT_ENDPT_ATTR_CC_ALGO:
+ if (tc->cc_algo == tcp_cc_algo_get (attr->cc_algo))
+ break;
+ tcp_cc_cleanup (tc);
+ tc->cc_algo = tcp_cc_algo_get (attr->cc_algo);
+ tcp_cc_init (tc);
+ break;
+ default:
+ rv = -1;
+ break;
+ }
+
+ return rv;
+}
+
+static int
+tcp_get_attribute (tcp_connection_t *tc, transport_endpt_attr_t *attr)
+{
+ int rv = 0;
+ u64 non;
+
+ switch (attr->type)
+ {
+ case TRANSPORT_ENDPT_ATTR_NEXT_OUTPUT_NODE:
+ non = (u64) tc->next_node_opaque << 32 | tc->next_node_index;
+ attr->next_output_node = non;
+ break;
+ case TRANSPORT_ENDPT_ATTR_MSS:
+ attr->mss = tc->snd_mss;
+ break;
+ case TRANSPORT_ENDPT_ATTR_FLAGS:
+ attr->flags = 0;
+ if (!(tc->cfg_flags & TCP_CFG_F_NO_CSUM_OFFLOAD))
+ attr->flags |= TRANSPORT_ENDPT_ATTR_F_CSUM_OFFLOAD;
+ if (tc->cfg_flags & TCP_CFG_F_TSO)
+ attr->flags |= TRANSPORT_ENDPT_ATTR_F_GSO;
+ if (tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE)
+ attr->flags |= TRANSPORT_ENDPT_ATTR_F_RATE_SAMPLING;
+ break;
+ case TRANSPORT_ENDPT_ATTR_CC_ALGO:
+ attr->cc_algo = tc->cc_algo - tcp_main.cc_algos;
+ break;
+ default:
+ rv = -1;
+ break;
+ }
+
+ return rv;
+}
+
+static int
+tcp_session_attribute (u32 conn_index, u32 thread_index, u8 is_get,
+ transport_endpt_attr_t *attr)
+{
+ tcp_connection_t *tc = tcp_connection_get (conn_index, thread_index);
+
+ if (PREDICT_FALSE (!tc))
+ return -1;
+
+ if (is_get)
+ return tcp_get_attribute (tc, attr);
+ else
+ return tcp_set_attribute (tc, attr);
+}
+
static u16
tcp_session_cal_goal_size (tcp_connection_t * tc)
{
u16 goal_size = tc->snd_mss;
- goal_size = TCP_MAX_GSO_SZ - tc->snd_mss % TCP_MAX_GSO_SZ;
+ goal_size = tcp_cfg.max_gso_size - tc->snd_mss % tcp_cfg.max_gso_size;
goal_size = clib_min (goal_size, tc->snd_wnd / 2);
return goal_size > tc->snd_mss ? goal_size : tc->snd_mss;
{
int snd_space;
- if (PREDICT_FALSE (tcp_in_fastrecovery (tc)
+ /* Fast path is disabled when recovery is on. @ref tcp_session_custom_tx
+ * controls both retransmits and the sending of new data while congested
+ */
+ if (PREDICT_FALSE (tcp_in_cong_recovery (tc)
|| tc->state == TCP_STATE_CLOSED))
return 0;
* to force the peer to send enough dupacks to start retransmitting as
* per Limited Transmit (RFC3042)
*/
- if (PREDICT_FALSE (tc->rcv_dupacks != 0 || tc->sack_sb.sacked_bytes))
+ if (PREDICT_FALSE (tc->rcv_dupacks || tc->sack_sb.sacked_bytes))
{
- if (tc->limited_transmit != tc->snd_nxt
- && (seq_lt (tc->limited_transmit, tc->snd_nxt - 2 * tc->snd_mss)
- || seq_gt (tc->limited_transmit, tc->snd_nxt)))
+ int snt_limited, n_pkts;
+
+ n_pkts = tcp_opts_sack_permitted (&tc->rcv_opts)
+ ? tc->sack_sb.reorder - 1 : 2;
+
+ if ((seq_lt (tc->limited_transmit, tc->snd_nxt - n_pkts * tc->snd_mss)
+ || seq_gt (tc->limited_transmit, tc->snd_nxt)))
tc->limited_transmit = tc->snd_nxt;
ASSERT (seq_leq (tc->limited_transmit, tc->snd_nxt));
- int snt_limited = tc->snd_nxt - tc->limited_transmit;
- snd_space = clib_max ((int) 2 * tc->snd_mss - snt_limited, 0);
+ snt_limited = tc->snd_nxt - tc->limited_transmit;
+ snd_space = clib_max (n_pkts * tc->snd_mss - snt_limited, 0);
}
return tcp_round_snd_space (tc, snd_space);
}
static timer_expiration_handler *timer_expiration_handlers[TCP_N_TIMERS] =
{
tcp_timer_retransmit_handler,
- tcp_timer_delack_handler,
tcp_timer_persist_handler,
tcp_timer_waitclose_handler,
tcp_timer_retransmit_syn_handler,
if (PREDICT_FALSE (!tc))
continue;
+ /* Skip if the timer is not pending. Probably it was reset while
+ * waiting for dispatch */
+ if (PREDICT_FALSE (!(tc->pending_timers & (1 << timer_id))))
+ continue;
+
+ tc->pending_timers &= ~(1 << timer_id);
+
/* Skip timer if it was rearmed while pending dispatch */
if (PREDICT_FALSE (tc->timers[timer_id] != TCP_TIMER_HANDLE_INVALID))
continue;
{
tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index);
- tcp_set_time_now (wrk);
+ tcp_set_time_now (wrk, now);
tcp_handle_cleanups (wrk, now);
- tw_timer_expire_timers_16t_2w_512sl (&wrk->timer_wheel, now);
+ tcp_timer_expire_timers (&wrk->timer_wheel, now);
tcp_dispatch_pending_timers (wrk);
}
tc->psh_seq = tc->snd_una + transport_max_tx_dequeue (tconn) - 1;
}
+static int
+tcp_session_app_rx_evt (transport_connection_t *conn)
+{
+ tcp_connection_t *tc = (tcp_connection_t *) conn;
+ u32 min_free, lo = 4 << 10, hi = 128 << 10;
+
+ if (!(tc->flags & TCP_CONN_ZERO_RWND_SENT))
+ return 0;
+
+ min_free = clib_clamp (transport_rx_fifo_size (conn) >> 3, lo, hi);
+ if (transport_max_rx_enqueue (conn) < min_free)
+ {
+ transport_rx_fifo_req_deq_ntf (conn);
+ return 0;
+ }
+
+ tcp_send_ack (tc);
+
+ return 0;
+}
+
/* *INDENT-OFF* */
const static transport_proto_vft_t tcp_proto = {
.enable = vnet_tcp_enable_disable,
.get_connection = tcp_session_get_transport,
.get_listener = tcp_session_get_listener,
.get_half_open = tcp_half_open_session_get_transport,
+ .attribute = tcp_session_attribute,
.connect = tcp_session_open,
+ .half_close = tcp_session_half_close,
.close = tcp_session_close,
.cleanup = tcp_session_cleanup,
.cleanup_ho = tcp_session_cleanup_ho,
.update_time = tcp_update_time,
.flush_data = tcp_session_flush_data,
.custom_tx = tcp_session_custom_tx,
+ .app_rx_evt = tcp_session_app_rx_evt,
.format_connection = format_tcp_session,
.format_listener = format_tcp_listener_session,
.format_half_open = format_tcp_half_open_session,
TCP_EVT (TCP_EVT_TIMER_POP, connection_index, timer_id);
tc->timers[timer_id] = TCP_TIMER_HANDLE_INVALID;
+ tc->pending_timers |= (1 << timer_id);
}
clib_fifo_add (wrk->pending_timers, expired_timers, n_expired);
session_queue_run_on_main_thread (wrk->vm);
}
-static void
-tcp_initialize_timer_wheels (tcp_main_t * tm)
-{
- tw_timer_wheel_16t_2w_512sl_t *tw;
- /* *INDENT-OFF* */
- foreach_vlib_main (({
- tw = &tm->wrk_ctx[ii].timer_wheel;
- tw_timer_wheel_init_16t_2w_512sl (tw, tcp_expired_timers_dispatch,
- TCP_TIMER_TICK, ~0);
- tw->last_run_time = vlib_time_now (this_vlib_main);
- }));
- /* *INDENT-ON* */
-}
-
static void
tcp_initialize_iss_seed (tcp_main_t * tm)
{
vec_reset_length (wrk->pending_deq_acked);
vec_reset_length (wrk->pending_disconnects);
vec_reset_length (wrk->pending_resets);
- wrk->vm = vlib_mains[thread];
+ wrk->vm = vlib_get_main_by_index (thread);
wrk->max_timers_per_loop = 10;
if (thread > 0)
*/
if ((thread > 0 || num_threads == 1) && prealloc_conn_per_wrk)
pool_init_fixed (wrk->connections, prealloc_conn_per_wrk);
+
+ tcp_timer_initialize_wheel (&wrk->timer_wheel,
+ tcp_expired_timers_dispatch,
+ vlib_time_now (vm));
}
/*
pool_init_fixed (tm->half_open_connections,
tcp_cfg.preallocated_half_open_connections);
- /* Initialize clocks per tick for TCP timestamp. Used to compute
- * monotonically increasing timestamps. */
- tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock
- / TCP_TSTAMP_RESOLUTION;
-
if (num_threads > 1)
{
clib_spinlock_init (&tm->half_open_lock);
}
- tcp_initialize_timer_wheels (tm);
tcp_initialize_iss_seed (tm);
tm->bytes_per_buffer = vlib_buffer_get_default_data_size (vm);
tcp_cfg.enable_tx_pacing = 1;
tcp_cfg.allow_tso = 0;
tcp_cfg.csum_offload = 1;
- tcp_cfg.cc_algo = TCP_CC_NEWRENO;
+ tcp_cfg.cc_algo = TCP_CC_CUBIC;
tcp_cfg.rwnd_min_update_ack = 1;
+ tcp_cfg.max_gso_size = TCP_MAX_GSO_SZ;
+
+ /* Time constants defined as timer tick (100us) multiples */
+ tcp_cfg.closewait_time = 20000; /* 2s */
+ tcp_cfg.timewait_time = 100000; /* 10s */
+ tcp_cfg.finwait1_time = 600000; /* 60s */
+ tcp_cfg.lastack_time = 300000; /* 30s */
+ tcp_cfg.finwait2_time = 300000; /* 30s */
+ tcp_cfg.closing_time = 300000; /* 30s */
- /* Time constants defined as timer tick (100ms) multiples */
- tcp_cfg.delack_time = 1; /* 0.1s */
- tcp_cfg.closewait_time = 20; /* 2s */
- tcp_cfg.timewait_time = 100; /* 10s */
- tcp_cfg.finwait1_time = 600; /* 60s */
- tcp_cfg.lastack_time = 300; /* 30s */
- tcp_cfg.finwait2_time = 300; /* 30s */
- tcp_cfg.closing_time = 300; /* 30s */
+ /* This value is seconds */
tcp_cfg.cleanup_time = 0.1; /* 100ms */
}
Code Review / vpp.git / blobdiff