*/
#include <vnet/tcp/tcp.h>
+#include <vnet/tcp/tcp_inlines.h>
#include <math.h>
typedef enum _tcp_output_next
* Figure out how much space we have available
*/
available_space = transport_max_rx_enqueue (&tc->connection);
- if (PREDICT_FALSE (available_space < tc->rcv_opts.mss))
- {
- tc->rcv_wnd = 0;
- return;
- }
/*
* Use the above and what we know about what we've previously advertised
*/
observed_wnd = (i32) tc->rcv_wnd - (tc->rcv_nxt - tc->rcv_las);
- /* Bad. Thou shalt not shrink */
+ /* Check if we are about to retract the window. Do the comparison before
+ * rounding to avoid errors. Per RFC7323 sec. 2.4 we could remove this */
if (PREDICT_FALSE ((i32) available_space < observed_wnd))
{
- wnd = clib_max (observed_wnd, 0);
+ wnd = round_down_pow2 (clib_max (observed_wnd, 0), 1 << tc->rcv_wscale);
TCP_EVT (TCP_EVT_RCV_WND_SHRUNK, tc, observed_wnd, available_space);
}
else
{
- wnd = available_space;
+ /* Make sure we have a multiple of 1 << rcv_wscale. We round down to
+ * avoid advertising a window larger than what can be buffered */
+ wnd = round_down_pow2 (available_space, 1 << tc->rcv_wscale);
}
- /* Make sure we have a multiple of rcv_wscale */
- if (wnd && tc->rcv_wscale)
- {
- wnd &= ~((1 << tc->rcv_wscale) - 1);
- if (wnd == 0)
- wnd = 1 << tc->rcv_wscale;
- }
+ if (PREDICT_FALSE (wnd < tc->rcv_opts.mss))
+ wnd = 0;
tc->rcv_wnd = clib_min (wnd, TCP_WND_MAX << tc->rcv_wscale);
}
return tc->rcv_wnd >> tc->rcv_wscale;
}
-/**
- * Write TCP options to segment.
- */
-static u32
-tcp_options_write (u8 * data, tcp_options_t * opts)
-{
- u32 opts_len = 0;
- u32 buf, seq_len = 4;
-
- if (tcp_opts_mss (opts))
- {
- *data++ = TCP_OPTION_MSS;
- *data++ = TCP_OPTION_LEN_MSS;
- buf = clib_host_to_net_u16 (opts->mss);
- clib_memcpy_fast (data, &buf, sizeof (opts->mss));
- data += sizeof (opts->mss);
- opts_len += TCP_OPTION_LEN_MSS;
- }
-
- if (tcp_opts_wscale (opts))
- {
- *data++ = TCP_OPTION_WINDOW_SCALE;
- *data++ = TCP_OPTION_LEN_WINDOW_SCALE;
- *data++ = opts->wscale;
- opts_len += TCP_OPTION_LEN_WINDOW_SCALE;
- }
-
- if (tcp_opts_sack_permitted (opts))
- {
- *data++ = TCP_OPTION_SACK_PERMITTED;
- *data++ = TCP_OPTION_LEN_SACK_PERMITTED;
- opts_len += TCP_OPTION_LEN_SACK_PERMITTED;
- }
-
- if (tcp_opts_tstamp (opts))
- {
- *data++ = TCP_OPTION_TIMESTAMP;
- *data++ = TCP_OPTION_LEN_TIMESTAMP;
- buf = clib_host_to_net_u32 (opts->tsval);
- clib_memcpy_fast (data, &buf, sizeof (opts->tsval));
- data += sizeof (opts->tsval);
- buf = clib_host_to_net_u32 (opts->tsecr);
- clib_memcpy_fast (data, &buf, sizeof (opts->tsecr));
- data += sizeof (opts->tsecr);
- opts_len += TCP_OPTION_LEN_TIMESTAMP;
- }
-
- if (tcp_opts_sack (opts))
- {
- int i;
-
- if (opts->n_sack_blocks != 0)
- {
- *data++ = TCP_OPTION_SACK_BLOCK;
- *data++ = 2 + opts->n_sack_blocks * TCP_OPTION_LEN_SACK_BLOCK;
- for (i = 0; i < opts->n_sack_blocks; i++)
- {
- buf = clib_host_to_net_u32 (opts->sacks[i].start);
- clib_memcpy_fast (data, &buf, seq_len);
- data += seq_len;
- buf = clib_host_to_net_u32 (opts->sacks[i].end);
- clib_memcpy_fast (data, &buf, seq_len);
- data += seq_len;
- }
- opts_len += 2 + opts->n_sack_blocks * TCP_OPTION_LEN_SACK_BLOCK;
- }
- }
-
- /* Terminate TCP options */
- if (opts_len % 4)
- {
- *data++ = TCP_OPTION_EOL;
- opts_len += TCP_OPTION_LEN_EOL;
- }
-
- /* Pad with zeroes to a u32 boundary */
- while (opts_len % 4)
- {
- *data++ = TCP_OPTION_NOOP;
- opts_len += TCP_OPTION_LEN_NOOP;
- }
- return opts_len;
-}
-
static int
tcp_make_syn_options (tcp_connection_t * tc, tcp_options_t * opts)
{
/**
* Convert buffer to FIN-ACK
*/
-void
+static void
tcp_make_fin (tcp_connection_t * tc, vlib_buffer_t * b)
{
tcp_make_ack_i (tc, b, TCP_STATE_ESTABLISHED, TCP_FLAG_FIN | TCP_FLAG_ACK);
/**
* Convert buffer to SYN-ACK
*/
-void
+static void
tcp_make_synack (tcp_connection_t * tc, vlib_buffer_t * b)
{
tcp_options_t _snd_opts, *snd_opts = &_snd_opts;
fib_protocol_t fib_proto;
if (PREDICT_FALSE (!vlib_buffer_alloc (vm, &bi, 1)))
- return;
+ {
+ tcp_worker_stats_inc (wrk, no_buffer, 1);
+ return;
+ }
b = vlib_get_buffer (vm, bi);
sw_if_index = vnet_buffer (pkt)->sw_if_index[VLIB_RX];
u8 flags;
if (PREDICT_FALSE (!vlib_buffer_alloc (vm, &bi, 1)))
- return;
+ {
+ tcp_worker_stats_inc (wrk, no_buffer, 1);
+ return;
+ }
b = vlib_get_buffer (vm, bi);
tcp_init_buffer (vm, b);
* Setup retransmit and establish timers before requesting buffer
* such that we can return if we've ran out.
*/
- tcp_timer_update (tc, TCP_TIMER_RETRANSMIT_SYN,
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT_SYN,
tc->rto * TCP_TO_TIMER_TICK);
if (PREDICT_FALSE (!vlib_buffer_alloc (vm, &bi, 1)))
{
- tcp_timer_update (tc, TCP_TIMER_RETRANSMIT_SYN, 1);
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT_SYN, 1);
+ tcp_worker_stats_inc (wrk, no_buffer, 1);
return;
}
vlib_buffer_t *b;
u32 bi;
- tcp_retransmit_timer_force_update (tc);
+ tcp_retransmit_timer_force_update (&wrk->timer_wheel, tc);
if (PREDICT_FALSE (!vlib_buffer_alloc (vm, &bi, 1)))
{
- tcp_timer_update (tc, TCP_TIMER_RETRANSMIT, 1);
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT, 1);
+ tcp_worker_stats_inc (wrk, no_buffer, 1);
return;
}
if (PREDICT_FALSE (!vlib_buffer_alloc (vm, &bi, 1)))
{
/* Out of buffers so program fin retransmit ASAP */
- tcp_timer_update (tc, TCP_TIMER_RETRANSMIT, 1);
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT, 1);
if (fin_snt)
tc->snd_nxt += 1;
else
/* Make sure retransmit retries a fin not data */
tc->flags |= TCP_CONN_FINSNT;
+ tcp_worker_stats_inc (wrk, no_buffer, 1);
return;
}
if ((tc->flags & TCP_CONN_SNDACK) && !tc->pending_dupacks)
tc->flags &= ~TCP_CONN_SNDACK;
- tcp_retransmit_timer_force_update (tc);
+ tcp_retransmit_timer_force_update (&wrk->timer_wheel, tc);
b = vlib_get_buffer (vm, bi);
tcp_init_buffer (vm, b);
tcp_make_fin (tc, b);
}
if (PREDICT_FALSE (!tcp_timer_is_active (tc, TCP_TIMER_RETRANSMIT)))
{
- tcp_retransmit_timer_set (tc);
+ tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index);
+ tcp_retransmit_timer_set (&wrk->timer_wheel, tc);
tc->rto_boff = 0;
}
tcp_trajectory_add_start (b, 3);
if (PREDICT_FALSE (!vlib_buffer_alloc (vm, &bi, 1)))
{
tcp_update_rcv_wnd (tc);
+ tcp_worker_stats_inc (wrk, no_buffer, 1);
return;
}
b = vlib_get_buffer (vm, bi);
}
}
-/**
- * Delayed ack timer handler
- *
- * Sends delayed ACK when timer expires
- */
-void
-tcp_timer_delack_handler (tcp_connection_t * tc)
-{
- tcp_send_ack (tc);
-}
-
/**
* Send window update ack
*
if (PREDICT_TRUE (seg_size <= bytes_per_buffer))
{
if (PREDICT_FALSE (!vlib_buffer_alloc (vm, &bi, 1)))
- return 0;
+ {
+ tcp_worker_stats_inc (wrk, no_buffer, 1);
+ return 0;
+ }
*b = vlib_get_buffer (vm, bi);
data = tcp_init_buffer (vm, *b);
n_bytes = session_tx_fifo_peek_bytes (&tc->connection, data, offset,
{
if (n_bufs)
vlib_buffer_free (vm, wrk->tx_buffers, n_bufs);
+ tcp_worker_stats_inc (wrk, no_buffer, 1);
return 0;
}
tc->bytes_retrans += n_bytes;
tc->segs_retrans += 1;
- tcp_workerp_stats_inc (wrk, rxt_segs, 1);
+ tcp_worker_stats_inc (wrk, rxt_segs, 1);
TCP_EVT (TCP_EVT_CC_RTX, tc, offset, n_bytes);
return n_bytes;
vlib_buffer_t *b = 0;
u32 bi, n_bytes;
- tcp_workerp_stats_inc (wrk, tr_events, 1);
+ tcp_worker_stats_inc (wrk, tr_events, 1);
/* Should be handled by a different handler */
if (PREDICT_FALSE (tc->state == TCP_STATE_SYN_SENT))
session_transport_closed_notify (&tc->connection);
tcp_connection_timers_reset (tc);
tcp_program_cleanup (wrk, tc);
- tcp_workerp_stats_inc (wrk, tr_abort, 1);
+ tcp_worker_stats_inc (wrk, tr_abort, 1);
return;
}
n_bytes = tcp_prepare_retransmit_segment (wrk, tc, 0, n_bytes, &b);
if (!n_bytes)
{
- tcp_timer_update (tc, TCP_TIMER_RETRANSMIT, 1);
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT, 1);
return;
}
tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4);
tc->rto = clib_min (tc->rto << 1, TCP_RTO_MAX);
- tcp_retransmit_timer_force_update (tc);
+ tcp_retransmit_timer_force_update (&wrk->timer_wheel, tc);
tc->rto_boff += 1;
if (tc->rto_boff == 1)
tcp_connection_set_state (tc, TCP_STATE_CLOSED);
tcp_connection_timers_reset (tc);
tcp_program_cleanup (wrk, tc);
- tcp_workerp_stats_inc (wrk, tr_abort, 1);
+ tcp_worker_stats_inc (wrk, tr_abort, 1);
return;
}
if (PREDICT_FALSE (!vlib_buffer_alloc (vm, &bi, 1)))
{
- tcp_timer_update (tc, TCP_TIMER_RETRANSMIT, 1);
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT, 1);
+ tcp_worker_stats_inc (wrk, no_buffer, 1);
return;
}
if (tc->rto_boff > TCP_RTO_SYN_RETRIES)
tc->rto = clib_min (tc->rto << 1, TCP_RTO_MAX);
- tcp_retransmit_timer_force_update (tc);
+ tcp_retransmit_timer_force_update (&wrk->timer_wheel, tc);
b = vlib_get_buffer (vm, bi);
tcp_init_buffer (vm, b);
/* Active open establish timeout */
if (tc->rto >= TCP_ESTABLISH_TIME >> 1)
{
- session_stream_connect_notify (&tc->connection, 1 /* fail */ );
+ session_stream_connect_notify (&tc->connection, SESSION_E_TIMEDOUT);
tcp_connection_cleanup (tc);
return;
}
if (PREDICT_FALSE (!vlib_buffer_alloc (vm, &bi, 1)))
{
- tcp_timer_update (tc, TCP_TIMER_RETRANSMIT_SYN, 1);
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT_SYN, 1);
+ tcp_worker_stats_inc (wrk, no_buffer, 1);
return;
}
tcp_push_ip_hdr (wrk, tc, b);
tcp_enqueue_to_ip_lookup (wrk, b, bi, tc->c_is_ip4, tc->c_fib_index);
- tcp_timer_update (tc, TCP_TIMER_RETRANSMIT_SYN,
+ tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT_SYN,
tc->rto * TCP_TO_TIMER_TICK);
}
* next time */
if (!available_bytes)
{
- tcp_persist_timer_set (tc);
+ tcp_persist_timer_set (&wrk->timer_wheel, tc);
return;
}
*/
if (PREDICT_FALSE (!vlib_buffer_alloc (vm, &bi, 1)))
{
- tcp_persist_timer_set (tc);
+ tcp_persist_timer_set (&wrk->timer_wheel, tc);
+ tcp_worker_stats_inc (wrk, no_buffer, 1);
return;
}
tcp_enqueue_to_output (wrk, b, bi, tc->c_is_ip4);
/* Just sent new data, enable retransmit */
- tcp_retransmit_timer_update (tc);
+ tcp_retransmit_timer_update (&wrk->timer_wheel, tc);
return;
}
int
-tcp_session_custom_tx (void *conn, u32 max_burst_size)
+tcp_session_custom_tx (void *conn, transport_send_params_t * sp)
{
tcp_connection_t *tc = (tcp_connection_t *) conn;
u32 n_segs = 0;
if (tcp_in_cong_recovery (tc) && (tc->flags & TCP_CONN_RXT_PENDING))
{
tc->flags &= ~TCP_CONN_RXT_PENDING;
- n_segs = tcp_do_retransmit (tc, max_burst_size);
- max_burst_size -= n_segs;
+ n_segs = tcp_do_retransmit (tc, sp->max_burst_size);
}
if (!(tc->flags & TCP_CONN_SNDACK))
if (n_segs && !tc->pending_dupacks)
return n_segs;
- if (!max_burst_size)
+ if (sp->max_burst_size <= n_segs)
{
tcp_program_ack (tc);
- return max_burst_size;
+ return n_segs;
}
- n_segs += tcp_send_acks (tc, max_burst_size);
+ n_segs += tcp_send_acks (tc, sp->max_burst_size - n_segs);
return n_segs;
}
}
}
- if (!TCP_ALWAYS_ACK)
- tcp_timer_reset (tc0, TCP_TIMER_DELACK);
-
tc0->segs_out += 1;
}
u32 n_left_from, *from, thread_index = vm->thread_index;
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
u16 nexts[VLIB_FRAME_SIZE], *next;
- vlib_node_runtime_t *error_node;
-
- error_node = vlib_node_get_runtime (vm, tcp_node_index (output, is_ip4));
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
tcp_check_if_gso (tc0, b[0]);
tcp_check_if_gso (tc1, b[1]);
- tcp_output_handle_packet (tc0, b[0], error_node, &next[0], is_ip4);
- tcp_output_handle_packet (tc1, b[1], error_node, &next[1], is_ip4);
+ tcp_output_handle_packet (tc0, b[0], node, &next[0], is_ip4);
+ tcp_output_handle_packet (tc1, b[1], node, &next[1], is_ip4);
}
else
{
{
tcp_output_push_ip (vm, b[0], tc0, is_ip4);
tcp_check_if_gso (tc0, b[0]);
- tcp_output_handle_packet (tc0, b[0], error_node, &next[0],
- is_ip4);
+ tcp_output_handle_packet (tc0, b[0], node, &next[0], is_ip4);
}
else
{
- b[0]->error = error_node->errors[TCP_ERROR_INVALID_CONNECTION];
+ b[0]->error = node->errors[TCP_ERROR_INVALID_CONNECTION];
next[0] = TCP_OUTPUT_NEXT_DROP;
}
if (tc1 != 0)
{
tcp_output_push_ip (vm, b[1], tc1, is_ip4);
tcp_check_if_gso (tc1, b[1]);
- tcp_output_handle_packet (tc1, b[1], error_node, &next[1],
- is_ip4);
+ tcp_output_handle_packet (tc1, b[1], node, &next[1], is_ip4);
}
else
{
- b[1]->error = error_node->errors[TCP_ERROR_INVALID_CONNECTION];
+ b[1]->error = node->errors[TCP_ERROR_INVALID_CONNECTION];
next[1] = TCP_OUTPUT_NEXT_DROP;
}
}
{
tcp_output_push_ip (vm, b[0], tc0, is_ip4);
tcp_check_if_gso (tc0, b[0]);
- tcp_output_handle_packet (tc0, b[0], error_node, &next[0], is_ip4);
+ tcp_output_handle_packet (tc0, b[0], node, &next[0], is_ip4);
}
else
{
- b[0]->error = error_node->errors[TCP_ERROR_INVALID_CONNECTION];
+ b[0]->error = node->errors[TCP_ERROR_INVALID_CONNECTION];
next[0] = TCP_OUTPUT_NEXT_DROP;
}
Code Review / vpp.git / blobdiff