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-rw-r--r--src/plugins/gbp/gbp_fwd_node.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/src/plugins/gbp/gbp_fwd_node.c b/src/plugins/gbp/gbp_fwd_node.c
new file mode 100644
index 00000000000..eff4aeb1880
--- /dev/null
+++ b/src/plugins/gbp/gbp_fwd_node.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2018 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 <plugins/gbp/gbp.h>
+#include <vnet/l2/l2_input.h>
+
+#define foreach_gbp_fwd \
+ _(DROP, "drop") \
+ _(OUTPUT, "output")
+
+typedef enum
+{
+#define _(sym,str) GBP_FWD_ERROR_##sym,
+ foreach_gbp_fwd
+#undef _
+ GBP_FWD_N_ERROR,
+} gbp_fwd_error_t;
+
+static char *gbp_fwd_error_strings[] = {
+#define _(sym,string) string,
+ foreach_gbp_fwd
+#undef _
+};
+
+typedef enum
+{
+#define _(sym,str) GBP_FWD_NEXT_##sym,
+ foreach_gbp_fwd
+#undef _
+ GBP_FWD_N_NEXT,
+} gbp_fwd_next_t;
+
+/**
+ * per-packet trace data
+ */
+typedef struct gbp_fwd_trace_t_
+{
+ /* per-pkt trace data */
+ epg_id_t src_epg;
+ u32 sw_if_index;
+} gbp_fwd_trace_t;
+
+VLIB_NODE_FN (gbp_fwd_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, *to_next;
+ u32 next_index;
+
+ next_index = 0;
+ n_left_from = frame->n_vectors;
+ from = vlib_frame_vector_args (frame);
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0, sw_if_index0, src_epg;
+ gbp_fwd_next_t next0;
+ vlib_buffer_t *b0;
+
+ next0 = GBP_FWD_NEXT_DROP;
+ 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);
+
+ /*
+ * lookup the uplink based on src EPG
+ */
+ src_epg = vnet_buffer2 (b0)->gbp.src_epg;
+
+ sw_if_index0 = gbp_epg_itf_lookup (src_epg);
+
+ if (~0 != sw_if_index0)
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index0;
+
+ next0 = GBP_FWD_NEXT_OUTPUT;
+ }
+ /*
+ * else
+ * don't know the uplink interface for this EPG => drop
+ */
+
+ if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ gbp_fwd_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->src_epg = src_epg;
+ t->sw_if_index = sw_if_index0;
+ }
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ 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);
+ }
+
+ return frame->n_vectors;
+}
+
+/* packet trace format function */
+static u8 *
+format_gbp_fwd_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 *);
+ gbp_fwd_trace_t *t = va_arg (*args, gbp_fwd_trace_t *);
+
+ s = format (s, "src-epg:%d", t->src_epg);
+
+ return s;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (gbp_fwd_node) = {
+ .name = "gbp-fwd",
+ .vector_size = sizeof (u32),
+ .format_trace = format_gbp_fwd_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(gbp_fwd_error_strings),
+ .error_strings = gbp_fwd_error_strings,
+
+ .n_next_nodes = GBP_FWD_N_NEXT,
+
+ .next_nodes = {
+ [GBP_FWD_NEXT_DROP] = "error-drop",
+ [GBP_FWD_NEXT_OUTPUT] = "l2-output",
+ },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */