if (tc->snd_una == tc->snd_nxt)
{
tcp_cc_event (tc, TCP_CC_EVT_START_TX);
- tcp_connection_tx_pacer_reset (tc, tc->cwnd, TRANSPORT_PACER_MIN_BURST);
}
if (tc->flags & TCP_CONN_PSH_PENDING)
}
}
-#endif /* CLIB_MARCH_VARIANT */
-
-static void *
-tcp_reuse_buffer (vlib_main_t * vm, vlib_buffer_t * b)
-{
- if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
- vlib_buffer_free_one (vm, b->next_buffer);
- /* 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;
- vnet_buffer (b)->tcp.flags = 0;
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b);
- /* Leave enough space for headers */
- return vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
-}
-
-#ifndef CLIB_MARCH_VARIANT
static void *
tcp_init_buffer (vlib_main_t * vm, vlib_buffer_t * b)
{
return vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
}
-
/* Compute TCP checksum in software when offloading is disabled for a connection */
u16
ip6_tcp_compute_checksum_custom (vlib_main_t * vm, vlib_buffer_t * p0,
wrk->tco_next_node[!is_ip4]);
}
-#endif /* CLIB_MARCH_VARIANT */
-
-static int
-tcp_make_reset_in_place (vlib_main_t * vm, vlib_buffer_t * b, u8 is_ip4)
+int
+tcp_buffer_make_reset (vlib_main_t *vm, vlib_buffer_t *b, u8 is_ip4)
{
- ip4_header_t *ih4;
- ip6_header_t *ih6;
- tcp_header_t *th;
- ip4_address_t src_ip4, dst_ip4;
+ ip4_address_t src_ip4 = {}, dst_ip4 = {};
ip6_address_t src_ip6, dst_ip6;
u16 src_port, dst_port;
u32 tmp, len, seq, ack;
+ ip4_header_t *ih4;
+ ip6_header_t *ih6;
+ tcp_header_t *th;
u8 flags;
- /* Find IP and TCP headers */
+ /*
+ * Find IP and TCP headers and glean information from them. Assumes
+ * buffer was parsed by something like @ref tcp_input_lookup_buffer
+ */
th = tcp_buffer_hdr (b);
- /* Save src and dst ip */
if (is_ip4)
{
ih4 = vlib_buffer_get_current (b);
seq = 0;
}
- tcp_reuse_buffer (vm, b);
+ /*
+ * Clear and reuse current buffer for reset
+ */
+ if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
+ vlib_buffer_free_one (vm, b->next_buffer);
+
+ /* Zero all flags but free list index and trace flag */
+ b->flags &= VLIB_BUFFER_NEXT_PRESENT - 1;
+ /* Make sure new tcp header comes after current ip */
+ b->current_data = ((u8 *) th - b->data) + sizeof (tcp_header_t);
+ b->current_length = 0;
+ b->total_length_not_including_first_buffer = 0;
+ vnet_buffer (b)->tcp.flags = 0;
+
+ /*
+ * Add TCP and IP headers
+ */
th = vlib_buffer_push_tcp_net_order (b, dst_port, src_port, seq, ack,
sizeof (tcp_header_t), flags, 0);
return 0;
}
-#ifndef CLIB_MARCH_VARIANT
/**
* Send reset without reusing existing buffer
*
flags = TCP_FLAG_RST;
seq = pkt_th->ack_number;
ack = (tc->state >= TCP_STATE_SYN_RCVD) ? tc->rcv_nxt : 0;
+ ack = clib_host_to_net_u32 (ack);
}
else
{
* such that we can return if we've ran out.
*/
tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT_SYN,
- tc->rto * TCP_TO_TIMER_TICK);
+ (u32) tc->rto * TCP_TO_TIMER_TICK);
if (PREDICT_FALSE (!vlib_buffer_alloc (vm, &bi, 1)))
{
return data_len;
}
-u32
-tcp_session_push_header (transport_connection_t * tconn, vlib_buffer_t * b)
+always_inline u32
+tcp_push_one_header (tcp_connection_t *tc, vlib_buffer_t *b)
{
- tcp_connection_t *tc = (tcp_connection_t *) tconn;
-
if (tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE)
tcp_bt_track_tx (tc, tcp_buffer_len (b));
/* update_snd_nxt */ 1);
tcp_validate_txf_size (tc, tc->snd_nxt - tc->snd_una);
+ return 0;
+}
+
+u32
+tcp_session_push_header (transport_connection_t *tconn, vlib_buffer_t **bs,
+ u32 n_bufs)
+{
+ tcp_connection_t *tc = (tcp_connection_t *) tconn;
+
+ while (n_bufs >= 4)
+ {
+ vlib_prefetch_buffer_header (bs[2], STORE);
+ vlib_prefetch_buffer_header (bs[3], STORE);
+
+ tcp_push_one_header (tc, bs[0]);
+ tcp_push_one_header (tc, bs[1]);
+
+ n_bufs -= 2;
+ bs += 2;
+ }
+ while (n_bufs)
+ {
+ if (n_bufs > 1)
+ vlib_prefetch_buffer_header (bs[1], STORE);
+
+ tcp_push_one_header (tc, bs[0]);
+
+ n_bufs -= 1;
+ bs += 1;
+ }
+
/* If not tracking an ACK, start tracking */
if (tc->rtt_ts == 0 && !tcp_in_cong_recovery (tc))
{
}
if (tcp_opts_sack_permitted (&tc->rcv_opts))
- tcp_check_sack_reneging (tc);
+ {
+ tcp_check_sack_reneging (tc);
+ scoreboard_rxt_mark_lost (&tc->sack_sb, tc->snd_una, tc->snd_nxt);
+ }
/* Update send congestion to make sure that rxt has data to send */
tc->snd_congestion = tc->snd_nxt;
tcp_enqueue_half_open (wrk, tc, b, bi);
tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT_SYN,
- tc->rto * TCP_TO_TIMER_TICK);
+ (u32) tc->rto * TCP_TO_TIMER_TICK);
}
/**
_(DROP, "error-drop") \
_(IP_LOOKUP, "ip6-lookup")
+static void
+tcp_reset_trace_frame (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_buffer_t **bs, u32 n_bufs, u8 is_ip4)
+{
+ tcp_header_t *tcp;
+ tcp_tx_trace_t *t;
+ int i;
+
+ for (i = 0; i < n_bufs; i++)
+ {
+ if (bs[i]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ tcp = vlib_buffer_get_current (bs[i]);
+ t = vlib_add_trace (vm, node, bs[i], sizeof (*t));
+
+ if (is_ip4)
+ {
+ ip4_header_t *ih4 = vlib_buffer_get_current (bs[i]);
+ tcp = ip4_next_header (ih4);
+ t->tcp_connection.c_lcl_ip.ip4 = ih4->dst_address;
+ t->tcp_connection.c_rmt_ip.ip4 = ih4->src_address;
+ t->tcp_connection.c_is_ip4 = 1;
+ }
+ else
+ {
+ ip6_header_t *ih6 = vlib_buffer_get_current (bs[i]);
+ tcp = ip6_next_header (ih6);
+ t->tcp_connection.c_lcl_ip.ip6 = ih6->dst_address;
+ t->tcp_connection.c_rmt_ip.ip6 = ih6->src_address;
+ }
+ t->tcp_connection.c_lcl_port = tcp->dst_port;
+ t->tcp_connection.c_rmt_port = tcp->src_port;
+ t->tcp_connection.c_proto = TRANSPORT_PROTO_TCP;
+ clib_memcpy_fast (&t->tcp_header, tcp, sizeof (t->tcp_header));
+ }
+ }
+}
+
static uword
-tcp46_send_reset_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * from_frame, u8 is_ip4)
+tcp46_reset_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, u8 is_ip4)
{
- u32 error0 = TCP_ERROR_RST_SENT, next0 = TCP_RESET_NEXT_IP_LOOKUP;
- u32 n_left_from, next_index, *from, *to_next;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+ u16 nexts[VLIB_FRAME_SIZE], *next;
+ u32 n_left_from, *from;
- from = vlib_frame_vector_args (from_frame);
- n_left_from = from_frame->n_vectors;
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
- next_index = node->cached_next_index;
+ b = bufs;
+ next = nexts;
while (n_left_from > 0)
{
- u32 n_left_to_next;
+ tcp_buffer_make_reset (vm, b[0], is_ip4);
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ /* IP lookup in fib where it was received. Previous value
+ * was overwritten by tcp-input */
+ vnet_buffer (b[0])->sw_if_index[VLIB_TX] =
+ vec_elt (ip4_main.fib_index_by_sw_if_index,
+ vnet_buffer (b[0])->sw_if_index[VLIB_RX]);
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- vlib_buffer_t *b0;
- tcp_tx_trace_t *t0;
- tcp_header_t *th0;
- u32 bi0;
-
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- tcp_make_reset_in_place (vm, b0, is_ip4);
-
- /* Prepare to send to IP lookup */
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
-
- b0->error = node->errors[error0];
- b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- th0 = vlib_buffer_get_current (b0);
- if (is_ip4)
- th0 = ip4_next_header ((ip4_header_t *) th0);
- else
- th0 = ip6_next_header ((ip6_header_t *) th0);
- t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
- clib_memcpy_fast (&t0->tcp_header, th0,
- sizeof (t0->tcp_header));
- }
+ b[0]->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
+ next[0] = TCP_RESET_NEXT_IP_LOOKUP;
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
- n_left_to_next, bi0, next0);
- }
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ b += 1;
+ next += 1;
+ n_left_from -= 1;
}
- return from_frame->n_vectors;
+
+ if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
+ tcp_reset_trace_frame (vm, node, bufs, frame->n_vectors, is_ip4);
+
+ vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
+
+ vlib_node_increment_counter (vm, node->node_index, TCP_ERROR_RST_SENT,
+ frame->n_vectors);
+
+ return frame->n_vectors;
}
VLIB_NODE_FN (tcp4_reset_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
- return tcp46_send_reset_inline (vm, node, from_frame, 1);
+ return tcp46_reset_inline (vm, node, from_frame, 1);
}
VLIB_NODE_FN (tcp6_reset_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
- return tcp46_send_reset_inline (vm, node, from_frame, 0);
+ return tcp46_reset_inline (vm, node, from_frame, 0);
}
/* *INDENT-OFF* */
Code Review / vpp.git / blobdiff