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authorFlorin Coras <fcoras@cisco.com>2021-11-08 13:35:28 -0800
committerFlorin Coras <fcoras@cisco.com>2021-11-08 16:41:03 -0800
commitf7b1f8a8911b51e01f7ecd79d25eb8d89da74884 (patch)
tree6200602b271735684013a567f1994796ef963178 /src/vnet
parent4c53ff459595c9ddc05002ee1847313127175b5f (diff)
tcp: refactor reset node
Use vectorized buffer translate function and refactor tracing. Type: refactor Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I5a014cea1a753eb10a564ac316c1727a18f884ff
Diffstat (limited to 'src/vnet')
-rw-r--r--src/vnet/tcp/tcp_output.c120
1 files changed, 71 insertions, 49 deletions
diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index 29d7724074e..403ddb3b962 100644
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -2331,76 +2331,98 @@ typedef enum _tcp_reset_next
_(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_buffer_make_reset (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* */