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-rw-r--r--src/plugins/tracenode/node.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/src/plugins/tracenode/node.c b/src/plugins/tracenode/node.c
new file mode 100644
index 00000000000..444d93f1708
--- /dev/null
+++ b/src/plugins/tracenode/node.c
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2023 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <vlib/vlib.h>
+#include <vnet/feature/feature.h>
+#include <vnet/classify/pcap_classify.h>
+
+typedef struct
+{
+ u32 sw_if_index;
+} tracenode_trace_t;
+
+static u8 *
+format_tracenode_trace (u8 *s, va_list *args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ vnet_main_t *vnm = vnet_get_main ();
+ tracenode_trace_t *t = va_arg (*args, tracenode_trace_t *);
+
+ s = format (s, "Packet traced from interface %U added",
+ format_vnet_sw_if_index_name, vnm, t->sw_if_index);
+ return s;
+}
+
+static_always_inline u32
+tracenode_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, int is_pcap)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_pcap_t *pp = &vnm->pcap;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ u32 *from = vlib_frame_vector_args (frame), *from0 = from;
+ const u32 n_tot = frame->n_vectors;
+ u32 n_left = n_tot;
+
+ vlib_get_buffers (vm, from, b, n_tot);
+
+ while (n_left > 0)
+ {
+ /* TODO: dual/quad loop */
+
+ /* enqueue b0 to the current next frame */
+ vnet_feature_next_u16 (next, b[0]);
+
+ /* buffer already traced */
+ if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
+ goto skip;
+
+ if (is_pcap && vnet_is_packet_pcaped (pp, b[0], ~0))
+ {
+ pcap_add_buffer (&pp->pcap_main, vm, from0[0],
+ pp->max_bytes_per_pkt);
+ }
+ else if (!is_pcap && vlib_trace_buffer (vm, node, next[0], b[0],
+ 1 /* follow_chain */))
+ {
+ tracenode_trace_t *tr = vlib_add_trace (vm, node, b[0], sizeof *tr);
+ tr->sw_if_index = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
+ }
+
+ skip:
+ b++;
+ from0++;
+ next++;
+ n_left--;
+ }
+
+ vlib_buffer_enqueue_to_next (vm, node, from, nexts, n_tot);
+ return n_tot;
+}
+
+VLIB_NODE_FN (trace_filtering_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return tracenode_inline (vm, node, frame, 0 /* is_pcap */);
+}
+
+VLIB_NODE_FN (pcap_filtering_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return tracenode_inline (vm, node, frame, 1 /* is_pcap */);
+}
+
+VLIB_REGISTER_NODE (trace_filtering_node) = {
+ .name = "trace-filtering",
+ .vector_size = sizeof (u32),
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .format_trace = format_tracenode_trace,
+};
+
+VLIB_REGISTER_NODE (pcap_filtering_node) = {
+ .name = "pcap-filtering",
+ .vector_size = sizeof (u32),
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .format_trace = format_tracenode_trace,
+};
+
+VNET_FEATURE_INIT (trace_filtering4, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "trace-filtering",
+ .runs_after = VNET_FEATURES ("ip4-full-reassembly-feature",
+ "ip4-sv-reassembly-feature"),
+};
+
+VNET_FEATURE_INIT (trace_filtering6, static) = {
+ .arc_name = "ip6-unicast",
+ .node_name = "trace-filtering",
+ .runs_after = VNET_FEATURES ("ip6-full-reassembly-feature",
+ "ip6-sv-reassembly-feature"),
+};
+
+VNET_FEATURE_INIT (pcap_filtering4, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "pcap-filtering",
+ .runs_after = VNET_FEATURES ("ip4-full-reassembly-feature",
+ "ip4-sv-reassembly-feature"),
+};
+
+VNET_FEATURE_INIT (pcap_filtering6, static) = {
+ .arc_name = "ip6-unicast",
+ .node_name = "pcap-filtering",
+ .runs_after = VNET_FEATURES ("ip6-full-reassembly-feature",
+ "ip6-sv-reassembly-feature"),
+};
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */