st);
if (handle == HALF_OPEN_LOOKUP_INVALID_VALUE)
{
- clib_warning ("This can't be good!");
+ clib_warning ("half-open was removed!");
return -1;
}
+ /* Cleanup half-open table */
+ stream_session_half_open_table_del (tc);
+
/* Get the app's index from the handle we stored when opening connection
* and the opaque (api_context for external apps) from transport session
- * index*/
+ * index */
app = application_get_if_valid (handle >> 32);
if (!app)
return -1;
new_s->session_state = SESSION_STATE_READY;
}
- /* Cleanup session lookup */
- stream_session_half_open_table_del (tc);
-
return error;
}
}
/**
- * Cleans up session and associated app if needed.
+ * Cleans up session and lookup table.
*/
void
stream_session_delete (stream_session_t * s)
/**
* Notification from transport that connection is being deleted
*
- * This should be called only on previously fully established sessions. For
- * instance failed connects should call stream_session_connect_notify and
- * indicate that the connect has failed.
+ * This removes the session if it is still valid. It should be called only on
+ * previously fully established sessions. For instance failed connects should
+ * call stream_session_connect_notify and indicate that the connect has
+ * failed.
*/
void
stream_session_delete_notify (transport_connection_t * tc)
if (PREDICT_TRUE (q->cursize < q->maxsize))
{
if (unix_shared_memory_queue_add (q, (u8 *) & evt,
- 1 /* do wait for mutex */ ))
+ 0 /* do wait for mutex */ ))
{
clib_warning ("failed to enqueue evt");
}
b0 = vlib_get_buffer (vm, bi0);
b0->error = 0;
- b0->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
+ b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
b0->current_data = 0;
b0->total_length_not_including_first_buffer = 0;
}));
/* *INDENT-ON* */
-
VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+ if (VLIB_BUFFER_TRACE_TRAJECTORY)
+ b0->pre_data[1] = 3;
+
if (PREDICT_FALSE (n_trace > 0))
{
session_queue_trace_t *t0;
/* Crude pacing for call setups */
if ((i % 4) == 0)
vlib_process_suspend (vm, 10e-6);
+ ASSERT (i + 1 >= tm->ready_connections);
+ while (i + 1 - tm->ready_connections > 8000)
+ {
+ vlib_process_suspend (vm, 100e-6);
+ }
}
}
{
tcp_main_t *tm = vnet_get_tcp_main ();
tcp_connection_t *tc = 0;
+ ASSERT (vlib_get_thread_index () == 0);
pool_get (tm->half_open_connections, tc);
memset (tc, 0, sizeof (*tc));
tc->c_c_index = tc - tm->half_open_connections;
}
#endif /* 0 */
+/**
+ * Initialize connection send variables.
+ */
+void
+tcp_init_snd_vars (tcp_connection_t * tc)
+{
+ u32 time_now;
+
+ /* Set random initial sequence */
+ time_now = tcp_time_now ();
+ tc->iss = random_u32 (&time_now);
+ tc->snd_una = tc->iss;
+ tc->snd_nxt = tc->iss + 1;
+ tc->snd_una_max = tc->snd_nxt;
+}
+
/** Initialize tcp connection variables
*
* Should be called after having received a msg from the peer, i.e., a SYN or
tcp_init_mss (tc);
scoreboard_init (&tc->sack_sb);
tcp_cc_init (tc);
+ if (tc->state == TCP_STATE_SYN_RCVD)
+ tcp_init_snd_vars (tc);
+
// tcp_connection_fib_attach (tc);
}
TCP_EVT_DBG (TCP_EVT_OPEN, tc);
tc->state = TCP_STATE_SYN_SENT;
+ tcp_init_snd_vars (tc);
tcp_send_syn (tc);
clib_spinlock_unlock_if_init (&tm->half_open_lock);
tc->snd_wnd, tc->rcv_wnd, tc->snd_wl1 - tc->irs,
tc->snd_wl2 - tc->iss);
s = format (s, " flight size %u send space %u rcv_wnd_av %d\n",
- tcp_flight_size (tc), tcp_available_snd_space (tc),
+ tcp_flight_size (tc), tcp_available_output_snd_space (tc),
tcp_rcv_wnd_available (tc));
s = format (s, " cong %U ", format_tcp_congestion_status, tc);
s = format (s, "cwnd %u ssthresh %u rtx_bytes %u bytes_acked %u\n",
return;
ASSERT (tc->state == TCP_STATE_SYN_RCVD);
+ /* Start cleanup. App wasn't notified yet so use delete notify as
+ * opposed to delete to cleanup session layer state. */
+ stream_session_delete_notify (&tc->connection);
}
tc->timers[TCP_TIMER_ESTABLISH] = TCP_TIMER_HANDLE_INVALID;
tcp_connection_cleanup (tc);
* ticks to timer units */
#define TCP_DELACK_TIME 1 /* 0.1s */
#define TCP_ESTABLISH_TIME 750 /* 75s */
-#define TCP_SYN_RCVD_TIME 100 /* 10s */
+#define TCP_SYN_RCVD_TIME 600 /* 60s */
#define TCP_2MSL_TIME 300 /* 30s */
#define TCP_CLOSEWAIT_TIME 20 /* 0.1s */
#define TCP_CLEANUP_TIME 5 /* 0.5s Time to wait before cleanup */
void tcp_connection_timers_init (tcp_connection_t * tc);
void tcp_connection_timers_reset (tcp_connection_t * tc);
+void tcp_init_snd_vars (tcp_connection_t * tc);
void tcp_connection_init_vars (tcp_connection_t * tc);
always_inline void
tcp_timer_set (tcp_connection_t * tc, u8 timer_id, u32 interval)
{
ASSERT (tc->c_thread_index == vlib_get_thread_index ());
+ ASSERT (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID);
tc->timers[timer_id]
= tw_timer_start_16t_2w_512sl (&tcp_main.timer_wheels[tc->c_thread_index],
tc->c_c_index, timer_id, interval);
always_inline void
tcp_retransmit_timer_set (tcp_connection_t * tc)
{
+ ASSERT (tc->snd_una != tc->snd_una_max);
tcp_timer_set (tc, TCP_TIMER_RETRANSMIT,
clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
}
{
tcp_retransmit_timer_reset (tc);
if (tc->snd_wnd < tc->snd_mss)
- tcp_persist_timer_set (tc);
+ tcp_persist_timer_update (tc);
}
else
tcp_timer_update (tc, TCP_TIMER_RETRANSMIT,
ed->data[0] = _tc->c_c_index; \
}
-#define TCP_EVT_SYN_RCVD_HANDLER(_tc, ...) \
+#define TCP_EVT_SYN_RCVD_HANDLER(_tc,_init, ...) \
{ \
- TCP_EVT_INIT_HANDLER(_tc, 0); \
+ if (_init) \
+ TCP_EVT_INIT_HANDLER(_tc, 0); \
ELOG_TYPE_DECLARE (_e) = \
{ \
.format = "syn-rx: irs %u", \
{ \
ELOG_TYPE_DECLARE (_e) = \
{ \
- .format = "syn-tx: iss %u", \
- .format_args = "i4", \
+ .format = "syn-tx: iss %u snd_una %u snd_una_max %u snd_nxt %u", \
+ .format_args = "i4i4i4i4", \
}; \
- DECLARE_ETD(_tc, _e, 1); \
+ DECLARE_ETD(_tc, _e, 4); \
ed->data[0] = _tc->iss; \
+ ed->data[1] = _tc->snd_una - _tc->iss; \
+ ed->data[2] = _tc->snd_una_max - _tc->iss; \
+ ed->data[3] = _tc->snd_nxt - _tc->iss; \
TCP_EVT_STATE_CHANGE_HANDLER(_tc); \
}
{ \
ELOG_TYPE_DECLARE (_e) = \
{ \
- .format = "synack-tx: iss %u irs %u", \
- .format_args = "i4i4", \
+ .format = "synack-tx: iss %u irs %u snd_una %u snd_nxt %u rcv_nxt %u",\
+ .format_args = "i4i4i4i4i4", \
}; \
- DECLARE_ETD(_tc, _e, 2); \
+ DECLARE_ETD(_tc, _e, 5); \
ed->data[0] = _tc->iss; \
ed->data[1] = _tc->irs; \
+ ed->data[2] = _tc->snd_una - _tc->iss; \
+ ed->data[3] = _tc->snd_nxt - _tc->iss; \
+ ed->data[4] = _tc->rcv_nxt - _tc->irs; \
}
#define TCP_EVT_SYNACK_RCVD_HANDLER(_tc, ...) \
{ \
ELOG_TYPE_DECLARE (_e) = \
{ \
- .format = "synack-rx: iss %u irs %u", \
- .format_args = "i4i4", \
+ .format = "synack-rx: iss %u irs %u snd_una %u snd_nxt %u rcv_nxt %u",\
+ .format_args = "i4i4i4i4i4", \
}; \
- DECLARE_ETD(_tc, _e, 2); \
+ DECLARE_ETD(_tc, _e, 5); \
ed->data[0] = _tc->iss; \
ed->data[1] = _tc->irs; \
+ ed->data[2] = _tc->snd_una - _tc->iss; \
+ ed->data[3] = _tc->snd_nxt - _tc->iss; \
+ ed->data[4] = _tc->rcv_nxt - _tc->irs; \
TCP_EVT_STATE_CHANGE_HANDLER(_tc); \
}
{ \
ELOG_TYPE_DECLARE (_e) = \
{ \
- .format = "%s-rxt: iss %u", \
- .format_args = "t4i4", \
+ .format = "%s-rxt: iss %u irs %u snd_nxt %u rcv_nxt %u", \
+ .format_args = "t4i4i4i4i4", \
.n_enum_strings = 2, \
.enum_strings = { \
"syn", \
"syn-ack", \
}, \
}; \
- DECLARE_ETD(_tc, _e, 2); \
+ DECLARE_ETD(_tc, _e, 5); \
ed->data[0] = _type; \
ed->data[1] = _tc->iss; \
+ ed->data[2] = _tc->irs; \
+ ed->data[3] = _tc->snd_nxt - _tc->iss; \
+ ed->data[4] = _tc->rcv_nxt - _tc->irs; \
}
#else
ed->data[0] = _tc->rcv_nxt - _tc->irs; \
ed->data[1] = _tc->rcv_wnd; \
ed->data[2] = _tc->snd_nxt - _tc->iss; \
- ed->data[3] = tcp_available_wnd(_tc); \
+ ed->data[3] = tcp_available_snd_wnd(_tc); \
ed->data[4] = _tc->snd_wnd; \
}
{ \
ELOG_TYPE_DECLARE (_e) = \
{ \
- .format = "acked: %u snd_una %u snd_wnd %u cwnd %u inflight %u", \
+ .format = "ack-rx: %u snd_una %u snd_wnd %u cwnd %u inflight %u", \
.format_args = "i4i4i4i4i4", \
}; \
DECLARE_ETD(_tc, _e, 5); \
{ \
ELOG_TYPE_DECLARE (_e) = \
{ \
- .format = "pktize: una %u snd_nxt %u space %u flight %u rcv_wnd %u",\
+ .format = "tx: una %u snd_nxt %u space %u flight %u rcv_wnd %u",\
.format_args = "i4i4i4i4i4", \
}; \
DECLARE_ETD(_tc, _e, 5); \
ed->data[0] = _tc->snd_una - _tc->iss; \
ed->data[1] = _tc->snd_nxt - _tc->iss; \
- ed->data[2] = tcp_available_snd_space (_tc); \
+ ed->data[2] = tcp_available_output_snd_space (_tc); \
ed->data[3] = tcp_flight_size (_tc); \
ed->data[4] = _tc->rcv_wnd; \
}
tcp_error (RST_SENT, "Resets sent")
tcp_error (INVALID_CONNECTION, "Invalid connection")
tcp_error (NO_WND, "No window")
-tcp_error (CONNECTION_CLOSED, "Connection closed")
\ No newline at end of file
+tcp_error (CONNECTION_CLOSED, "Connection closed")
+tcp_error (CREATE_EXISTS, "Connection already exists")
\ No newline at end of file
if (PREDICT_FALSE (tcp_options_parse (th0, &tc0->rcv_opts)))
{
+ clib_warning ("options parse error");
return -1;
}
if (tcp_syn (th0))
{
/* TODO implement RFC 5961 */
- tcp_make_ack (tc0, b0);
+ if (tc0->state != TCP_STATE_SYN_RCVD)
+ tcp_make_ack (tc0, b0);
+ else
+ tcp_make_synack (tc0, b0);
*next0 = tcp_next_output (tc0->c_is_ip4);
- TCP_EVT_DBG (TCP_EVT_SYN_RCVD, tc0);
+ TCP_EVT_DBG (TCP_EVT_SYN_RCVD, tc0, 0);
return -1;
}
vlib_node_registration_t tcp4_syn_sent_node;
vlib_node_registration_t tcp6_syn_sent_node;
+static u8
+tcp_lookup_is_valid (tcp_connection_t * tc, tcp_header_t * hdr)
+{
+ transport_connection_t *tmp;
+ if (!tc)
+ return 1;
+
+ u8 is_valid = (tc->c_lcl_port == hdr->dst_port
+ && (tc->state == TCP_STATE_LISTEN
+ || tc->c_rmt_port == hdr->src_port));
+
+ if (!is_valid)
+ {
+ if ((tmp =
+ stream_session_half_open_lookup (&tc->c_lcl_ip, &tc->c_rmt_ip,
+ tc->c_lcl_port, tc->c_rmt_port,
+ tc->c_transport_proto)))
+ {
+ if (tmp->lcl_port == hdr->dst_port
+ && tmp->rmt_port == hdr->src_port)
+ {
+ clib_warning ("half-open is valid!");
+ }
+ }
+ }
+ return is_valid;
+}
+
+/**
+ * Lookup transport connection
+ */
+static tcp_connection_t *
+tcp_lookup_connection (vlib_buffer_t * b, u8 thread_index, u8 is_ip4)
+{
+ tcp_header_t *tcp;
+ transport_connection_t *tconn;
+ tcp_connection_t *tc;
+ if (is_ip4)
+ {
+ ip4_header_t *ip4;
+ ip4 = vlib_buffer_get_current (b);
+ tcp = ip4_next_header (ip4);
+ tconn = stream_session_lookup_transport_wt4 (&ip4->dst_address,
+ &ip4->src_address,
+ tcp->dst_port,
+ tcp->src_port,
+ SESSION_TYPE_IP4_TCP,
+ thread_index);
+ tc = tcp_get_connection_from_transport (tconn);
+ ASSERT (tcp_lookup_is_valid (tc, tcp));
+ }
+ else
+ {
+ ip6_header_t *ip6;
+ ip6 = vlib_buffer_get_current (b);
+ tcp = ip6_next_header (ip6);
+ tconn = stream_session_lookup_transport_wt6 (&ip6->dst_address,
+ &ip6->src_address,
+ tcp->dst_port,
+ tcp->src_port,
+ SESSION_TYPE_IP6_TCP,
+ thread_index);
+ tc = tcp_get_connection_from_transport (tconn);
+ ASSERT (tcp_lookup_is_valid (tc, tcp));
+ }
+ return tc;
+}
+
always_inline uword
tcp46_syn_sent_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame, int is_ip4)
goto drop;
}
+ /* Half-open completed recently but the connection was't removed
+ * yet by the owning thread */
+ if (PREDICT_FALSE (tc0->flags & TCP_CONN_HALF_OPEN_DONE))
+ {
+ /* Make sure the connection actually exists */
+ ASSERT (tcp_lookup_connection (b0, my_thread_index, is_ip4));
+ goto drop;
+ }
+
ack0 = vnet_buffer (b0)->tcp.ack_number;
seq0 = vnet_buffer (b0)->tcp.seq_number;
tcp0 = tcp_buffer_hdr (b0);
*/
if (tcp_ack (tcp0))
{
- if (ack0 <= tc0->iss || ack0 > tc0->snd_nxt)
+ if (seq_leq (ack0, tc0->iss) || seq_gt (ack0, tc0->snd_nxt))
{
+ clib_warning ("ack not in rcv wnd");
if (!tcp_rst (tcp0))
tcp_send_reset_w_pkt (tc0, b0, is_ip4);
goto drop;
}
/* Make sure ACK is valid */
- if (tc0->snd_una > ack0)
- goto drop;
+ if (seq_gt (tc0->snd_una, ack0))
+ {
+ clib_warning ("ack invalid");
+ goto drop;
+ }
}
/*
/* No SYN flag. Drop. */
if (!tcp_syn (tcp0))
- goto drop;
+ {
+ clib_warning ("not synack");
+ goto drop;
+ }
/* Parse options */
if (tcp_options_parse (tcp0, &tc0->rcv_opts))
- goto drop;
+ {
+ clib_warning ("options parse fail");
+ goto drop;
+ }
/* Valid SYN or SYN-ACK. Move connection from half-open pool to
* current thread pool. */
if (tcp_opts_wscale (&new_tc0->rcv_opts))
new_tc0->snd_wscale = new_tc0->rcv_opts.wscale;
- new_tc0->snd_wnd = clib_net_to_host_u16 (tcp0->window)
- << new_tc0->snd_wscale;
+ /* RFC1323: SYN and SYN-ACK wnd not scaled */
+ new_tc0->snd_wnd = clib_net_to_host_u16 (tcp0->window);
new_tc0->snd_wl1 = seq0;
new_tc0->snd_wl2 = ack0;
* allocate session send reset */
if (stream_session_connect_notify (&new_tc0->connection, 0))
{
+ clib_warning ("connect notify fail");
tcp_send_reset_w_pkt (new_tc0, b0, is_ip4);
tcp_connection_cleanup (new_tc0);
goto drop;
}
tc0->rtt_ts = 0;
+ tcp_init_snd_vars (tc0);
tcp_make_synack (new_tc0, b0);
next0 = tcp_next_output (is_ip4);
+ tcp_is_syn (tcp0) + tcp_is_fin (tcp0)
+ vnet_buffer (b0)->tcp.data_len;
+ if (CLIB_DEBUG)
+ {
+ tcp_connection_t *tmp;
+ tmp = tcp_lookup_connection (b0, my_thread_index, is_ip4);
+ if (tmp->state != tc0->state)
+ {
+ clib_warning ("state changed");
+ ASSERT (0);
+ goto drop;
+ }
+ }
+
/*
* Special treatment for CLOSED
*/
*/
/* 1-4: check SEQ, RST, SYN */
- if (PREDICT_FALSE
- (tcp_segment_validate (vm, tc0, b0, tcp0, &next0)))
+ if (PREDICT_FALSE (tcp_segment_validate (vm, tc0, b0, tcp0,
+ &next0)))
{
error0 = TCP_ERROR_SEGMENT_INVALID;
goto drop;
*/
if (!tcp_rcv_ack_is_acceptable (tc0, b0))
{
+ clib_warning ("connection not accepted");
tcp_send_reset_w_pkt (tc0, b0, is_ip4);
goto drop;
}
/* Reset SYN-ACK retransmit and SYN_RCV establish timers */
tcp_retransmit_timer_reset (tc0);
tcp_timer_reset (tc0, TCP_TIMER_ESTABLISH);
+ TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc0);
break;
case TCP_STATE_ESTABLISHED:
/* We can get packets in established state here because they
/* Send FIN-ACK notify app and enter CLOSE-WAIT */
tcp_connection_timers_reset (tc0);
tcp_make_fin (tc0, b0);
+ tc0->snd_nxt += 1;
next0 = tcp_next_output (tc0->c_is_ip4);
stream_session_disconnect_notify (&tc0->connection);
tc0->state = TCP_STATE_CLOSE_WAIT;
/* 3. check for a SYN (did that already) */
+ /* Make sure connection wasn't just created */
+ child0 = tcp_lookup_connection (b0, my_thread_index, is_ip4);
+ if (PREDICT_FALSE (child0->state != TCP_STATE_LISTEN))
+ {
+ error0 = TCP_ERROR_CREATE_EXISTS;
+ goto drop;
+ }
+
/* Create child session and send SYN-ACK */
child0 = tcp_connection_new (my_thread_index);
child0->c_lcl_port = lc0->c_lcl_port;
if (stream_session_accept (&child0->connection, lc0->c_s_index, sst,
0 /* notify */ ))
{
+ clib_warning ("session accept fail");
+ tcp_connection_cleanup (child0);
error0 = TCP_ERROR_CREATE_SESSION_FAIL;
goto drop;
}
if (tcp_options_parse (th0, &child0->rcv_opts))
{
+ clib_warning ("options parse fail");
goto drop;
}
child0->snd_wl2 = vnet_buffer (b0)->tcp.ack_number;
tcp_connection_init_vars (child0);
- TCP_EVT_DBG (TCP_EVT_SYN_RCVD, child0);
+ TCP_EVT_DBG (TCP_EVT_SYN_RCVD, child0, 1);
/* Reuse buffer to make syn-ack and send */
tcp_make_synack (child0, b0);
#define filter_flags (TCP_FLAG_SYN|TCP_FLAG_ACK|TCP_FLAG_RST|TCP_FLAG_FIN)
-static u8
-tcp_lookup_is_valid (tcp_connection_t * tc, tcp_header_t * hdr)
-{
- transport_connection_t *tmp;
- if (!tc)
- return 1;
-
- u8 is_valid = (tc->c_lcl_port == hdr->dst_port
- && (tc->state == TCP_STATE_LISTEN
- || tc->c_rmt_port == hdr->src_port));
-
- if (!is_valid)
- {
- if ((tmp =
- stream_session_half_open_lookup (&tc->c_lcl_ip, &tc->c_rmt_ip,
- tc->c_lcl_port, tc->c_rmt_port,
- tc->c_transport_proto)))
- {
- if (tmp->lcl_port == hdr->dst_port
- && tmp->rmt_port == hdr->src_port)
- {
- clib_warning ("half-open is valid!");
- }
- }
- }
- return is_valid;
-}
-
always_inline uword
tcp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame, int is_ip4)
vlib_buffer_t *b0;
tcp_header_t *tcp0 = 0;
tcp_connection_t *tc0;
+ transport_connection_t *tconn;
ip4_header_t *ip40;
ip6_header_t *ip60;
u32 error0 = TCP_ERROR_NO_LISTENER, next0 = TCP_INPUT_NEXT_DROP;
+ tcp_header_bytes (tcp0));
n_data_bytes0 = clib_net_to_host_u16 (ip40->length)
- n_advance_bytes0;
-
- tc0 =
- (tcp_connection_t *)
- stream_session_lookup_transport_wt4 (&ip40->dst_address,
- &ip40->src_address,
- tcp0->dst_port,
- tcp0->src_port,
- SESSION_TYPE_IP4_TCP,
- my_thread_index);
+ tconn = stream_session_lookup_transport_wt4 (&ip40->dst_address,
+ &ip40->src_address,
+ tcp0->dst_port,
+ tcp0->src_port,
+ SESSION_TYPE_IP4_TCP,
+ my_thread_index);
+ tc0 = tcp_get_connection_from_transport (tconn);
ASSERT (tcp_lookup_is_valid (tc0, tcp0));
}
else
n_data_bytes0 = clib_net_to_host_u16 (ip60->payload_length)
- n_advance_bytes0;
n_advance_bytes0 += sizeof (ip60[0]);
-
- tc0 =
- (tcp_connection_t *)
- stream_session_lookup_transport_wt6 (&ip60->dst_address,
- &ip60->src_address,
- tcp0->dst_port,
- tcp0->src_port,
- SESSION_TYPE_IP6_TCP,
- my_thread_index);
+ tconn = stream_session_lookup_transport_wt6 (&ip60->dst_address,
+ &ip60->src_address,
+ tcp0->dst_port,
+ tcp0->src_port,
+ SESSION_TYPE_IP6_TCP,
+ my_thread_index);
+ tc0 = tcp_get_connection_from_transport (tconn);
ASSERT (tcp_lookup_is_valid (tc0, tcp0));
}
}
static u8
-tcp_window_compute_scale (u32 available_space)
+tcp_window_compute_scale (u32 window)
{
u8 wnd_scale = 0;
- while (wnd_scale < TCP_MAX_WND_SCALE
- && (available_space >> wnd_scale) > TCP_WND_MAX)
+ while (wnd_scale < TCP_MAX_WND_SCALE && (window >> wnd_scale) > TCP_WND_MAX)
wnd_scale++;
return wnd_scale;
}
vec_validate (tm->tx_buffers[thread_index],
current_length + n_free_buffers - 1);
- _vec_len (tm->tx_buffers[thread_index]) =
- current_length + vlib_buffer_alloc_from_free_list (vlib_get_main (),
- tm->tx_buffers
- [thread_index],
- n_free_buffers,
- VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+ _vec_len (tm->tx_buffers[thread_index]) = current_length
+ + vlib_buffer_alloc (vlib_get_main (),
+ &tm->tx_buffers[thread_index][current_length],
+ n_free_buffers);
/* buffer shortage, report failure */
if (vec_len (tm->tx_buffers[thread_index]) == 0)
{
return -1;
}
my_tx_buffers = tm->tx_buffers[thread_index];
- *bidx = my_tx_buffers[_vec_len (my_tx_buffers) - 1];
+ *bidx = my_tx_buffers[vec_len (my_tx_buffers) - 1];
_vec_len (my_tx_buffers) -= 1;
return 0;
}
always_inline void
tcp_return_buffer (tcp_main_t * tm)
{
- u32 *my_tx_buffers;
- u32 thread_index = vlib_get_thread_index ();
- my_tx_buffers = tm->tx_buffers[thread_index];
- _vec_len (my_tx_buffers) += 1;
+ _vec_len (tm->tx_buffers[vlib_get_thread_index ()]) += 1;
}
always_inline void *
{
if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
vlib_buffer_free_one (vm, b->next_buffer);
- b->flags = 0;
+ /* Zero all flags but free list index and trace flag */
+ b->flags &= VLIB_BUFFER_NEXT_PRESENT - 1;
b->current_data = 0;
b->current_length = 0;
b->total_length_not_including_first_buffer = 0;
tcp_init_buffer (vlib_main_t * vm, vlib_buffer_t * b)
{
ASSERT ((b->flags & VLIB_BUFFER_NEXT_PRESENT) == 0);
- b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
+ b->flags &= VLIB_BUFFER_FREE_LIST_INDEX_MASK;
+ b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
b->total_length_not_including_first_buffer = 0;
vnet_buffer (b)->tcp.flags = 0;
/* Reset flags, make sure ack is sent */
vnet_buffer (b)->tcp.flags &= ~TCP_BUF_FLAG_DUPACK;
+}
+
+/**
+ * Convert buffer to SYN
+ */
+void
+tcp_make_syn (tcp_connection_t * tc, vlib_buffer_t * b)
+{
+ u8 tcp_hdr_opts_len, tcp_opts_len;
+ tcp_header_t *th;
+ u16 initial_wnd;
+ tcp_options_t snd_opts;
+
+ initial_wnd = tcp_initial_window_to_advertise (tc);
- tc->snd_nxt += 1;
+ /* Make and write options */
+ memset (&snd_opts, 0, sizeof (snd_opts));
+ tcp_opts_len = tcp_make_syn_options (&snd_opts, tc->rcv_wscale);
+ tcp_hdr_opts_len = tcp_opts_len + sizeof (tcp_header_t);
+
+ th = vlib_buffer_push_tcp (b, tc->c_lcl_port, tc->c_rmt_port, tc->iss,
+ tc->rcv_nxt, tcp_hdr_opts_len, TCP_FLAG_SYN,
+ initial_wnd);
+ vnet_buffer (b)->tcp.connection_index = tc->c_c_index;
+ tcp_options_write ((u8 *) (th + 1), &snd_opts);
+
+ tcp_timer_update (tc, TCP_TIMER_RETRANSMIT_SYN,
+ tc->rto * TCP_TO_TIMER_TICK);
}
/**
u8 tcp_opts_len, tcp_hdr_opts_len;
tcp_header_t *th;
u16 initial_wnd;
- u32 time_now;
memset (snd_opts, 0, sizeof (*snd_opts));
-
tcp_reuse_buffer (vm, b);
- /* Set random initial sequence */
- time_now = tcp_time_now ();
-
- tc->iss = random_u32 (&time_now);
- tc->snd_una = tc->iss;
- tc->snd_nxt = tc->iss + 1;
- tc->snd_una_max = tc->snd_nxt;
-
initial_wnd = tcp_initial_window_to_advertise (tc);
-
- /* Make and write options */
tcp_opts_len = tcp_make_synack_options (tc, snd_opts);
tcp_hdr_opts_len = tcp_opts_len + sizeof (tcp_header_t);
th = vlib_buffer_push_tcp (b, tc->c_lcl_port, tc->c_rmt_port, tc->iss,
tc->rcv_nxt, tcp_hdr_opts_len,
TCP_FLAG_SYN | TCP_FLAG_ACK, initial_wnd);
-
tcp_options_write ((u8 *) (th + 1), snd_opts);
vnet_buffer (b)->tcp.connection_index = tc->c_c_index;
vnet_buffer (b)->tcp.flags = TCP_BUF_FLAG_ACK;
- /* Init retransmit timer */
- tcp_retransmit_timer_set (tc);
+ /* Init retransmit timer. Use update instead of set because of
+ * retransmissions */
+ tcp_retransmit_timer_force_update (tc);
TCP_EVT_DBG (TCP_EVT_SYNACK_SENT, tc);
}
u32 bi;
tcp_main_t *tm = vnet_get_tcp_main ();
vlib_main_t *vm = vlib_get_main ();
- u8 tcp_hdr_opts_len, tcp_opts_len;
- tcp_header_t *th;
- u32 time_now;
- u16 initial_wnd;
- tcp_options_t snd_opts;
if (PREDICT_FALSE (tcp_get_free_buffer_index (tm, &bi)))
return;
b = vlib_get_buffer (vm, bi);
tcp_init_buffer (vm, b);
-
- /* Set random initial sequence */
- time_now = tcp_time_now ();
-
- tc->iss = random_u32 (&time_now);
- tc->snd_una = tc->iss;
- tc->snd_una_max = tc->snd_nxt = tc->iss + 1;
-
- initial_wnd = tcp_initial_window_to_advertise (tc);
-
- /* Make and write options */
- memset (&snd_opts, 0, sizeof (snd_opts));
- tcp_opts_len = tcp_make_syn_options (&snd_opts, tc->rcv_wscale);
- tcp_hdr_opts_len = tcp_opts_len + sizeof (tcp_header_t);
-
- th = vlib_buffer_push_tcp (b, tc->c_lcl_port, tc->c_rmt_port, tc->iss,
- tc->rcv_nxt, tcp_hdr_opts_len, TCP_FLAG_SYN,
- initial_wnd);
-
- tcp_options_write ((u8 *) (th + 1), &snd_opts);
+ tcp_make_syn (tc, b);
/* Measure RTT with this */
tc->rtt_ts = tcp_time_now ();
tc->rtt_seq = tc->snd_nxt;
-
- /* Start retransmit trimer */
- tcp_timer_set (tc, TCP_TIMER_RETRANSMIT_SYN, tc->rto * TCP_TO_TIMER_TICK);
tc->rto_boff = 0;
/* Set the connection establishment timer */
/* buffer will be initialized by in tcp_make_fin */
tcp_make_fin (tc, b);
tcp_enqueue_to_output_now (vm, b, bi, tc->c_is_ip4);
- tc->flags |= TCP_CONN_FINSNT;
- tc->flags &= ~TCP_CONN_FINPNDG;
+ if (!(tc->flags & TCP_CONN_FINSNT))
+ {
+ tc->flags |= TCP_CONN_FINSNT;
+ tc->flags &= ~TCP_CONN_FINPNDG;
+ tc->snd_nxt += 1;
+ }
tcp_retransmit_timer_force_update (tc);
TCP_EVT_DBG (TCP_EVT_FIN_SENT, tc);
}
* Make sure we can retransmit something
*/
available_bytes = stream_session_tx_fifo_max_dequeue (&tc->connection);
+ ASSERT (available_bytes >= offset);
available_bytes -= offset;
if (!available_bytes)
return 0;
VLIB_FRAME_SIZE - available_bufs))
{
tcp_return_buffer (tm);
+ *b = 0;
return 0;
}
}
ASSERT (n_peeked == len_to_deq);
n_bytes += n_peeked;
chain_b->current_length = n_peeked;
- chain_b->flags = 0;
+ chain_b->flags &= VLIB_BUFFER_FREE_LIST_INDEX_MASK;
chain_b->next_buffer = 0;
/* update previous buffer */
tc->timers[TCP_TIMER_RETRANSMIT] = TCP_TIMER_HANDLE_INVALID;
}
- if (!tcp_in_recovery (tc) && tc->rto_boff > 0
- && tc->state >= TCP_STATE_ESTABLISHED)
- {
- tc->rto_boff = 0;
- tcp_update_rto (tc);
- }
-
- /* Increment RTO backoff (also equal to number of retries) */
- tc->rto_boff += 1;
-
- /* Go back to first un-acked byte */
- tc->snd_nxt = tc->snd_una;
-
if (tc->state >= TCP_STATE_ESTABLISHED)
{
/* Lost FIN, retransmit and return */
return;
}
+ /* We're not in recovery so make sure rto_boff is 0 */
+ if (!tcp_in_recovery (tc) && tc->rto_boff > 0)
+ {
+ tc->rto_boff = 0;
+ tcp_update_rto (tc);
+ }
+
+ /* Increment RTO backoff (also equal to number of retries) and go back
+ * to first un-acked byte */
+ tc->rto_boff += 1;
+ tc->snd_nxt = tc->snd_una;
+
/* First retransmit timeout */
if (tc->rto_boff == 1)
tcp_rtx_timeout_cc (tc);
if (n_bytes == 0)
{
- if (b)
- {
- clib_warning ("retransmit fail: %U", format_tcp_connection, tc,
- 2);
- ASSERT (tc->rto_boff > 1 && tc->snd_una == tc->snd_congestion);
- }
+ ASSERT (!b);
+ if (tc->snd_una == tc->snd_una_max)
+ return;
+ ASSERT (tc->rto_boff > 1 && tc->snd_una == tc->snd_congestion);
+ clib_warning ("retransmit fail: %U", format_tcp_connection, tc, 2);
/* Try again eventually */
tcp_retransmit_timer_set (tc);
return;
/* For first retransmit, record timestamp (Eifel detection RFC3522) */
if (tc->rto_boff == 1)
tc->snd_rxt_ts = tcp_time_now ();
+
+ tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4);
+ tcp_retransmit_timer_update (tc);
}
- /* Retransmit for SYN/SYNACK */
- else if (tc->state == TCP_STATE_SYN_RCVD || tc->state == TCP_STATE_SYN_SENT)
+ /* Retransmit for SYN */
+ else if (tc->state == TCP_STATE_SYN_SENT)
{
/* Half-open connection actually moved to established but we were
* waiting for syn retransmit to pop to call cleanup from the right
* thread. */
if (tc->flags & TCP_CONN_HALF_OPEN_DONE)
{
- ASSERT (tc->state == TCP_STATE_SYN_SENT);
if (tcp_half_open_connection_cleanup (tc))
{
clib_warning ("could not remove half-open connection");
/* Try without increasing RTO a number of times. If this fails,
* start growing RTO exponentially */
+ tc->rto_boff += 1;
if (tc->rto_boff > TCP_RTO_SYN_RETRIES)
tc->rto = clib_min (tc->rto << 1, TCP_RTO_MAX);
if (PREDICT_FALSE (tcp_get_free_buffer_index (tm, &bi)))
- {
- clib_warning ("tcp_get_free_buffer_index FAIL");
- return;
- }
+ return;
+
b = vlib_get_buffer (vm, bi);
tcp_init_buffer (vm, b);
- tcp_push_hdr_i (tc, b, tc->state, 1);
+ tcp_make_syn (tc, b);
- /* Account for the SYN */
- tc->snd_nxt += 1;
tc->rtt_ts = 0;
- TCP_EVT_DBG (TCP_EVT_SYN_RXT, tc,
- (tc->state == TCP_STATE_SYN_SENT ? 0 : 1));
+ TCP_EVT_DBG (TCP_EVT_SYN_RXT, tc, 0);
+
+ /* This goes straight to ipx_lookup. Retransmit timer set already */
+ tcp_push_ip_hdr (tm, tc, b);
+ tcp_enqueue_to_ip_lookup (vm, b, bi, tc->c_is_ip4);
}
- else
+ /* Retransmit SYN-ACK */
+ else if (tc->state == TCP_STATE_SYN_RCVD)
{
- ASSERT (tc->state == TCP_STATE_CLOSED);
- clib_warning ("connection closed ...");
- return;
- }
+ tc->rto_boff += 1;
+ tc->rto = clib_min (tc->rto << 1, TCP_RTO_MAX);
+ tc->rtt_ts = 0;
- if (!is_syn)
- {
- tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4);
+ if (PREDICT_FALSE (tcp_get_free_buffer_index (tm, &bi)))
+ return;
+
+ b = vlib_get_buffer (vm, bi);
+ tcp_make_synack (tc, b);
+ TCP_EVT_DBG (TCP_EVT_SYN_RXT, tc, 1);
- /* Re-enable retransmit timer */
- tcp_retransmit_timer_set (tc);
+ /* Retransmit timer already updated, just enqueue to output */
+ tcp_enqueue_to_output (vm, b, bi, tc->c_is_ip4);
}
else
{
- ASSERT (tc->state == TCP_STATE_SYN_SENT);
-
- /* This goes straight to ipx_lookup */
- tcp_push_ip_hdr (tm, tc, b);
- tcp_enqueue_to_ip_lookup (vm, b, bi, tc->c_is_ip4);
-
- /* Re-enable retransmit timer */
- tcp_timer_set (tc, TCP_TIMER_RETRANSMIT_SYN,
- tc->rto * TCP_TO_TIMER_TICK);
+ ASSERT (tc->state == TCP_STATE_CLOSED);
+ clib_warning ("connection closed ...");
+ return;
}
}
{
vec_add1 (callback_vector, t->user_handle);
#if TW_START_STOP_TRACE_SIZE > 0
- TW (tw_timer_trace) (tw, 0xfe, ~0, t - tw->timers);
+ TW (tw_timer_trace) (tw, 0xfe, t->user_handle,
+ t - tw->timers);
#endif
pool_put (tw->timers, t);
}
{
vec_add1 (callback_vector, t->user_handle);
#if TW_START_STOP_TRACE_SIZE > 0
- TW (tw_timer_trace) (tw, 0xfe, ~0, t - tw->timers);
+ TW (tw_timer_trace) (tw, 0xfe, t->user_handle,
+ t - tw->timers);
#endif
pool_put (tw->timers, t);
}
{
vec_add1 (callback_vector, t->user_handle);
#if TW_START_STOP_TRACE_SIZE > 0
- TW (tw_timer_trace) (tw, 0xfe, ~0, t - tw->timers);
+ TW (tw_timer_trace) (tw, 0xfe, t->user_handle,
+ t - tw->timers);
#endif
pool_put (tw->timers, t);
}
next_index = t->next;
vec_add1 (callback_vector, t->user_handle);
#if TW_START_STOP_TRACE_SIZE > 0
- TW (tw_timer_trace) (tw, 0xfe, ~0, t - tw->timers);
+ TW (tw_timer_trace) (tw, 0xfe, t->user_handle, t - tw->timers);
#endif
pool_put (tw->timers, t);
}
Code Review / vpp.git / commitdiff