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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:
*/
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