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-rw-r--r--src/vnet/dpo/ip6_ll_dpo.c203
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diff --git a/src/vnet/dpo/ip6_ll_dpo.c b/src/vnet/dpo/ip6_ll_dpo.c
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+/*
+ * 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.
+ */
+/**
+ * @brief
+ * The data-path object representing performing a lookup in the IPv6
+ * link local table
+ */
+
+#include <vnet/dpo/ip6_ll_dpo.h>
+#include <vnet/ip/ip6_ll_table.h>
+
+/**
+ * @brief the IP6 link-local DPO is global
+ */
+static dpo_id_t ip6_ll_dpo = {
+ .dpoi_type = DPO_IP6_LL,
+ .dpoi_proto = DPO_PROTO_IP6,
+ .dpoi_index = 0,
+};
+
+const dpo_id_t *
+ip6_ll_dpo_get (void)
+{
+ return (&ip6_ll_dpo);
+}
+
+static void
+ip6_ll_dpo_lock (dpo_id_t * dpo)
+{
+ /*
+ * not maintaining a lock count on the ip6_ll, they are const global and
+ * never die.
+ */
+}
+
+static void
+ip6_ll_dpo_unlock (dpo_id_t * dpo)
+{
+}
+
+static u8 *
+format_ip6_ll_dpo (u8 * s, va_list * ap)
+{
+ CLIB_UNUSED (index_t index) = va_arg (*ap, index_t);
+ CLIB_UNUSED (u32 indent) = va_arg (*ap, u32);
+
+ return (format (s, "ip6-link-local"));
+}
+
+const static dpo_vft_t ip6_ll_vft = {
+ .dv_lock = ip6_ll_dpo_lock,
+ .dv_unlock = ip6_ll_dpo_unlock,
+ .dv_format = format_ip6_ll_dpo,
+};
+
+/**
+ * @brief The per-protocol VLIB graph nodes that are assigned to a ip6_ll
+ * object.
+ *
+ * this means that these graph nodes are ones from which a ip6_ll is the
+ * parent object in the DPO-graph.
+ */
+const static char *const ip6_null_nodes[] = {
+ "ip6-link-local",
+ NULL,
+};
+
+const static char *const *const ip6_ll_nodes[DPO_PROTO_NUM] = {
+ [DPO_PROTO_IP6] = ip6_null_nodes,
+};
+
+typedef struct ip6_ll_dpo_trace_t_
+{
+ u32 fib_index;
+ u32 sw_if_index;
+} ip6_ll_dpo_trace_t;
+
+/**
+ * @brief Exit nodes from a IP6_LL
+ */
+typedef enum ip6_ll_next_t_
+{
+ IP6_LL_NEXT_DROP,
+ IP6_LL_NEXT_LOOKUP,
+ IP6_LL_NEXT_NUM,
+} ip6_ll_next_t;
+
+always_inline uword
+ip6_ll_dpo_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ u32 n_left_from, next_index, *from, *to_next;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_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 > 0 && n_left_to_next > 0)
+ {
+ u32 bi0, fib_index0, next0;
+ vlib_buffer_t *p0;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+ next0 = IP6_LL_NEXT_LOOKUP;
+
+ p0 = vlib_get_buffer (vm, bi0);
+
+ /* use the packet's RX interface to pick the link-local FIB */
+ fib_index0 =
+ ip6_ll_fib_get (vnet_buffer (p0)->sw_if_index[VLIB_RX]);
+ /* write that fib index into the packet so it's used in the
+ * lookup node next */
+ vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0;
+
+ if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ip6_ll_dpo_trace_t *tr = vlib_add_trace (vm, node, p0,
+ sizeof (*tr));
+ tr->sw_if_index = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+ tr->fib_index = fib_index0;
+ }
+ 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;
+}
+
+static u8 *
+format_ip6_ll_dpo_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 *);
+ ip6_ll_dpo_trace_t *t = va_arg (*args, ip6_ll_dpo_trace_t *);
+
+ s = format (s, "sw_if_index:%d fib_index:%d", t->sw_if_index, t->fib_index);
+ return s;
+}
+
+static uword
+ip6_ll_dpo_switch (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return (ip6_ll_dpo_inline (vm, node, frame));
+}
+
+/**
+ * @brief
+ */
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_ll_dpo_node) =
+{
+ .function = ip6_ll_dpo_switch,
+ .name = "ip6-link-local",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip6_ll_dpo_trace,
+ .n_next_nodes = IP6_LL_NEXT_NUM,
+ .next_nodes = {
+ [IP6_LL_NEXT_DROP] = "ip6-drop",
+ [IP6_LL_NEXT_LOOKUP] = "ip6-lookup",
+ },
+};
+/* *INDENT-ON* */
+
+void
+ip6_ll_dpo_module_init (void)
+{
+ dpo_register (DPO_IP6_LL, &ip6_ll_vft, ip6_ll_nodes);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */