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authorFlorin Coras <fcoras@cisco.com>2021-05-04 14:53:25 -0700
committerDamjan Marion <dmarion@me.com>2021-05-05 07:33:33 +0000
commit7f969c700424f0735a3c4f98f258094480f5d648 (patch)
tree27ee86c1274d34d9a289bbe29c171fb875a65be5 /src/vnet/tcp
parentb636abeba0bc73e9aa492424d0eca020e645e477 (diff)
tcp: cleanup listen node and bulk buffer translation
Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I2d11b1411a7653b94fddd889a5f28640c5f5566c
Diffstat (limited to 'src/vnet/tcp')
-rw-r--r--src/vnet/tcp/tcp_input.c89
1 files changed, 48 insertions, 41 deletions
diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index aa6a9eae663..a9159ad5973 100644
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -2547,48 +2547,68 @@ VLIB_REGISTER_NODE (tcp6_rcv_process_node) =
};
/* *INDENT-ON* */
+static void
+tcp46_listen_trace_frame (vlib_main_t *vm, vlib_node_runtime_t *node,
+ u32 *to_next, u32 n_bufs)
+{
+ tcp_connection_t *tc = 0;
+ tcp_rx_trace_t *t;
+ vlib_buffer_t *b;
+ int i;
+
+ for (i = 0; i < n_bufs; i++)
+ {
+ b = vlib_get_buffer (vm, to_next[i]);
+ if (!(b->flags & VLIB_BUFFER_IS_TRACED))
+ continue;
+ if (vnet_buffer (b)->tcp.flags == TCP_STATE_LISTEN)
+ tc = tcp_listener_get (vnet_buffer (b)->tcp.connection_index);
+ t = vlib_add_trace (vm, node, b, sizeof (*t));
+ tcp_set_rx_trace_data (t, tc, tcp_buffer_hdr (b), b, 1);
+ }
+}
+
/**
* LISTEN state processing as per RFC 793 p. 65
*/
always_inline uword
-tcp46_listen_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * from_frame, int is_ip4)
+tcp46_listen_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, int is_ip4)
{
- u32 n_left_from, *from, n_syns = 0, *first_buffer;
+ u32 n_left_from, *from, n_syns = 0;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
u32 thread_index = vm->thread_index;
- from = first_buffer = 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;
+
+ if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
+ tcp46_listen_trace_frame (vm, node, from, n_left_from);
+
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+ b = bufs;
while (n_left_from > 0)
{
- u32 bi, error = TCP_ERROR_NONE;
+ u32 error = TCP_ERROR_NONE;
tcp_connection_t *lc, *child;
- vlib_buffer_t *b;
-
- bi = from[0];
- from += 1;
- n_left_from -= 1;
-
- b = vlib_get_buffer (vm, bi);
/* Flags initialized with connection state after lookup */
- if (vnet_buffer (b)->tcp.flags == TCP_STATE_LISTEN)
+ if (vnet_buffer (b[0])->tcp.flags == TCP_STATE_LISTEN)
{
- lc = tcp_listener_get (vnet_buffer (b)->tcp.connection_index);
+ lc = tcp_listener_get (vnet_buffer (b[0])->tcp.connection_index);
}
else
{
tcp_connection_t *tc;
- tc = tcp_connection_get (vnet_buffer (b)->tcp.connection_index,
+ tc = tcp_connection_get (vnet_buffer (b[0])->tcp.connection_index,
thread_index);
if (tc->state != TCP_STATE_TIME_WAIT)
{
- lc = 0;
error = TCP_ERROR_CREATE_EXISTS;
goto done;
}
- lc = tcp_lookup_listener (b, tc->c_fib_index, is_ip4);
+ lc = tcp_lookup_listener (b[0], tc->c_fib_index, is_ip4);
/* clean up the old session */
tcp_connection_del (tc);
/* listener was cleaned up */
@@ -2600,8 +2620,8 @@ tcp46_listen_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
}
/* Make sure connection wasn't just created */
- child = tcp_lookup_connection (lc->c_fib_index, b, thread_index,
- is_ip4);
+ child =
+ tcp_lookup_connection (lc->c_fib_index, b[0], thread_index, is_ip4);
if (PREDICT_FALSE (child->state != TCP_STATE_LISTEN))
{
error = TCP_ERROR_CREATE_EXISTS;
@@ -2610,32 +2630,23 @@ tcp46_listen_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
/* Create child session. For syn-flood protection use filter */
- /* 1. first check for an RST: handled in dispatch */
- /* if (tcp_rst (th0))
- goto drop;
- */
+ /* 1. first check for an RST: handled by input dispatch */
- /* 2. second check for an ACK: handled in dispatch */
- /* if (tcp_ack (th0))
- {
- tcp_send_reset (b0, is_ip4);
- goto drop;
- }
- */
+ /* 2. second check for an ACK: handled by input dispatch */
/* 3. check for a SYN (did that already) */
/* Create child session and send SYN-ACK */
child = tcp_connection_alloc (thread_index);
- if (tcp_options_parse (tcp_buffer_hdr (b), &child->rcv_opts, 1))
+ if (tcp_options_parse (tcp_buffer_hdr (b[0]), &child->rcv_opts, 1))
{
error = TCP_ERROR_OPTIONS;
tcp_connection_free (child);
goto done;
}
- tcp_init_w_buffer (child, b, is_ip4);
+ tcp_init_w_buffer (child, b[0], is_ip4);
child->state = TCP_STATE_SYN_RCVD;
child->c_fib_index = lc->c_fib_index;
@@ -2665,19 +2676,15 @@ tcp46_listen_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
done:
- if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
- {
- tcp_rx_trace_t *t = vlib_add_trace (vm, node, b, sizeof (*t));
- tcp_set_rx_trace_data (t, lc, tcp_buffer_hdr (b), b, is_ip4);
- }
-
+ b += 1;
+ n_left_from -= 1;
n_syns += (error == TCP_ERROR_NONE);
}
tcp_inc_counter (listen, TCP_ERROR_SYNS_RCVD, n_syns);
- vlib_buffer_free (vm, first_buffer, from_frame->n_vectors);
+ vlib_buffer_free (vm, from, frame->n_vectors);
- return from_frame->n_vectors;
+ return frame->n_vectors;
}
VLIB_NODE_FN (tcp4_listen_node) (vlib_main_t * vm, vlib_node_runtime_t * node,