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-rw-r--r--vlib-api/vlibapi/node_serialize.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/vlib-api/vlibapi/node_serialize.c b/vlib-api/vlibapi/node_serialize.c
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+/*
+ * Copyright (c) 2016 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 <vppinfra/serialize.h>
+
+/*
+ * Serialize a vlib_node_main_t. Appends the result to vector.
+ * Pass 0 to create a new vector, use vec_reset_length(vector)
+ * to recycle a vector / avoid memory allocation, etc.
+ * Switch heaps before/after to serialize into API client shared memory.
+ */
+
+u8 * vlib_node_serialize (vlib_node_main_t *nm, u8 * vector)
+{
+ serialize_main_t _sm, *sm=&_sm;
+ vlib_node_t * node;
+ int i, j;
+ u8 * cstemp = 0;
+
+ serialize_open_vector (sm, vector);
+
+ serialize_likely_small_unsigned_integer (sm, vec_len(nm->nodes));
+ for (i = 0; i < vec_len (nm->nodes); i++)
+ {
+ node = nm->nodes[i];
+ vec_reset_length (cstemp);
+ cstemp = vec_dup(node->name);
+ vec_add1(cstemp, 0);
+ serialize_cstring (sm, (char *)cstemp);
+ serialize_likely_small_unsigned_integer (sm, vec_len(node->next_nodes));
+ for (j = 0; j < vec_len (node->next_nodes); j++)
+ serialize_likely_small_unsigned_integer (sm, node->next_nodes[j]);
+ }
+ vec_free(cstemp);
+
+ return (serialize_close_vector (sm));
+}
+
+vlib_node_t ** vlib_node_unserialize (u8 * vector)
+{
+ serialize_main_t _sm, *sm=&_sm;
+ u32 nnodes, nnexts;
+ vlib_node_t * node;
+ vlib_node_t ** nodes = 0;
+ int i, j;
+
+ serialize_open_vector (sm, vector);
+
+ nnodes = unserialize_likely_small_unsigned_integer (sm);
+
+ vec_validate (nodes, nnodes-1);
+
+ for (i = 0; i < nnodes; i++)
+ {
+ node = 0;
+ vec_validate (node,0);
+ nodes[i] = node;
+ unserialize_cstring (sm, (char **)&node->name);
+
+ nnexts = unserialize_likely_small_unsigned_integer (sm);
+ if (nnexts > 0)
+ vec_validate (node->next_nodes, nnexts-1);
+ for (j = 0; j < vec_len (node->next_nodes); j++)
+ node->next_nodes[j] =
+ unserialize_likely_small_unsigned_integer (sm);
+ }
+ return nodes;
+}
+
+
+#if CLIB_DEBUG > 0
+
+static clib_error_t *
+test_node_serialize_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ vlib_node_main_t * nm = &vm->node_main;
+ u8 * vector = 0;
+ vlib_node_t ** nodes;
+ vlib_node_t * node;
+ vlib_node_t * next_node;
+ int i, j;
+
+ /*
+ * Keep the number of memcpy ops to a minimum (e.g. 1).
+ * The current size of the serialized vector is
+ * slightly under 4K.
+ */
+ vec_validate (vector, 4095);
+ vec_reset_length (vector);
+
+ vector = vlib_node_serialize (nm, vector);
+
+ nodes = vlib_node_unserialize (vector);
+
+ vec_free (vector);
+
+ for (i = 0; i < vec_len(nodes); i++)
+ {
+ node = nodes[i];
+
+ vlib_cli_output (vm, "[%d] %s", i, node->name);
+ for (j = 0; j < vec_len (node->next_nodes); j++)
+ {
+ if (node->next_nodes[j] != ~0)
+ next_node = nodes[node->next_nodes[j]];
+ vlib_cli_output (vm, " [%d] %s", j, next_node->name);
+ }
+ }
+
+ for (i = 0; i < vec_len(nodes); i++)
+ {
+ vec_free (nodes[i]->name);
+ vec_free (nodes[i]->next_nodes);
+ vec_free (nodes[i]);
+ }
+ vec_free(nodes);
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (test_node_serialize_node, static) = {
+ .path = "test node serialize",
+ .short_help = "test node serialize",
+ .function = test_node_serialize_command_fn,
+};
+#endif