--- /dev/null
+/*
+ * Copyright (c) 2017 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/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vppinfra/error.h>
+#include <ioam/ipfixcollector/ipfixcollector.h>
+#include <vnet/flow/ipfix_packet.h>
+
+#define foreach_ipfix_collector_error \
+_(PROCESSED, "Number of IP-Fix packets processed") \
+_(NO_LISTENER, "Number of IP-Fix packets with no listener")
+
+typedef enum
+{
+#define _(sym,str) IPFIX_COLLECTOR_ERROR_##sym,
+ foreach_ipfix_collector_error
+#undef _
+ IPFIX_COLLECTOR_N_ERROR,
+} flowperpkt_error_t;
+
+static char *ipfix_collector_error_strings[] = {
+#define _(sym,string) string,
+ foreach_ipfix_collector_error
+#undef _
+};
+
+typedef enum
+{
+ IPFIX_COLLECTOR_NEXT_DROP,
+ IPFIX_COLLECTOR_N_NEXT,
+} ipfix_collector_next_t;
+
+typedef struct
+{
+ u32 next_node;
+ u16 set_id;
+ u16 pad;
+} ipfix_collector_trace_t;
+
+vlib_node_registration_t ipfix_collector_node;
+
+/* packet trace format function */
+static u8 *
+format_ipfix_collector_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 *);
+ ipfix_collector_trace_t *t = va_arg (*args, ipfix_collector_trace_t *);
+
+ s = format (s,
+ "IPFIX_COLLECTOR: set_id %u, next_node %u", t->set_id,
+ t->next_node);
+ return s;
+}
+
+/**
+ * @brief Node to receive IP-Fix packets.
+ * @node ipfix-collector
+ *
+ * This function receives IP-FIX packets and forwards them to other graph nodes
+ * based on SetID field in IP-FIX.
+ *
+ * @param vm vlib_main_t corresponding to the current thread.
+ * @param node vlib_node_runtime_t data for this node.
+ * @param frame vlib_frame_t whose contents should be dispatched.
+ *
+ * @par Graph mechanics: buffer, next index usage
+ *
+ * <em>Uses:</em>
+ * - <code>vlib_buffer_get_current(p0)</code>
+ * - Parses IP-Fix packet to extract SetId which will be used to decide
+ * next node where packets should be enqueued.
+ *
+ * <em>Next Index:</em>
+ * - Dispatches the packet to other VPP graph nodes based on their registartion
+ * for the IP-Fix SetId using API ipfix_collector_reg_setid().
+ */
+uword
+ipfix_collector_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ u32 n_left_from, next_index, *from, *to_next;
+ word n_no_listener = 0;
+ word n_listener = 0;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ 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 >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ u32 next0, next1;
+ ipfix_message_header_t *ipfix0, *ipfix1;
+ ipfix_set_header_t *set0, *set1;
+ u16 set_id0, set_id1;
+ ipfix_client *client0, *client1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t *p2, *p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data,
+ (sizeof (ipfix_message_header_t) +
+ sizeof (ipfix_set_header_t)), LOAD);
+ CLIB_PREFETCH (p3->data,
+ (sizeof (ipfix_message_header_t) +
+ sizeof (ipfix_set_header_t)), LOAD);
+ }
+
+ bi0 = from[0];
+ bi1 = from[1];
+ to_next[0] = bi0;
+ to_next[1] = bi1;
+ from += 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+ n_left_from -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ ipfix0 = vlib_buffer_get_current (b0);
+ ipfix1 = vlib_buffer_get_current (b1);
+
+ set0 = (ipfix_set_header_t *) (ipfix0 + 1);
+ set1 = (ipfix_set_header_t *) (ipfix1 + 1);
+
+ set_id0 = (u16) (clib_net_to_host_u32 (set0->set_id_length) >> 16);
+ set_id1 = (u16) (clib_net_to_host_u32 (set1->set_id_length) >> 16);
+
+ client0 = ipfix_collector_get_client (set_id0);
+ client1 = ipfix_collector_get_client (set_id1);
+
+ if (PREDICT_TRUE (NULL != client0))
+ {
+ next0 = client0->client_next_node;
+ n_listener++;
+ }
+ else
+ {
+ next0 = IPFIX_COLLECTOR_NEXT_DROP;
+ n_no_listener++;
+ }
+
+ if (PREDICT_TRUE (NULL != client1))
+ {
+ next1 = client1->client_next_node;
+ n_listener++;
+ }
+ else
+ {
+ next1 = IPFIX_COLLECTOR_NEXT_DROP;
+ n_no_listener++;
+ }
+
+ vlib_buffer_advance (b0,
+ (sizeof (ipfix_message_header_t)
+ + sizeof (ipfix_set_header_t)));
+ vlib_buffer_advance (b1,
+ (sizeof (ipfix_message_header_t)
+ + sizeof (ipfix_set_header_t)));
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ipfix_collector_trace_t *tr = vlib_add_trace (vm, node,
+ b0, sizeof (*tr));
+ tr->next_node = (client0 ? client0->client_node : 0xFFFFFFFF);
+ tr->set_id = set_id0;
+ }
+ if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ipfix_collector_trace_t *tr = vlib_add_trace (vm, node,
+ b1, sizeof (*tr));
+ tr->next_node = (client1 ? client1->client_node : 0xFFFFFFFF);
+ tr->set_id = set_id1;
+ }
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ ipfix_message_header_t *ipfix0;
+ ipfix_set_header_t *set0;
+ u16 set_id0;
+ ipfix_client *client0;
+
+ 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);
+ ipfix0 = vlib_buffer_get_current (b0);
+
+ set0 = (ipfix_set_header_t *) (ipfix0 + 1);
+
+ set_id0 = (u16) (clib_net_to_host_u32 (set0->set_id_length) >> 16);
+
+ client0 = ipfix_collector_get_client (set_id0);
+
+ if (PREDICT_TRUE (NULL != client0))
+ {
+ next0 = client0->client_next_node;
+ n_listener++;
+ }
+ else
+ {
+ next0 = IPFIX_COLLECTOR_NEXT_DROP;
+ n_no_listener++;
+ }
+
+ vlib_buffer_advance (b0,
+ (sizeof (ipfix_message_header_t)
+ + sizeof (ipfix_set_header_t)));
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ipfix_collector_trace_t *tr = vlib_add_trace (vm, node,
+ b0, sizeof (*tr));
+ tr->next_node = (client0 ? client0->client_node : 0xFFFFFFFF);
+ tr->set_id = set_id0;
+ }
+
+ 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);
+ }
+ vlib_error_count (vm, node->node_index,
+ IPFIX_COLLECTOR_ERROR_NO_LISTENER, n_no_listener);
+ vlib_error_count (vm, node->node_index,
+ IPFIX_COLLECTOR_ERROR_PROCESSED, n_listener);
+ return from_frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ipfix_collector_node) = {
+ .function = ipfix_collector_node_fn,
+ .name = "ipfix-collector",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipfix_collector_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(ipfix_collector_error_strings),
+ .error_strings = ipfix_collector_error_strings,
+
+ .n_next_nodes = IPFIX_COLLECTOR_N_NEXT,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [IPFIX_COLLECTOR_NEXT_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff