/*
* 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>
/**
* Grouping of global data for the GBP source EPG classification feature
*/
typedef struct gbp_fwd_main_t_
{
/**
* Next nodes for L2 output features
*/
u32 l2_input_feat_next[32];
} gbp_fwd_main_t;
static gbp_fwd_main_t gbp_fwd_main;
#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;
static uword
gbp_fwd (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) = {
.function = gbp_fwd,
.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",
},
};
VLIB_NODE_FUNCTION_MULTIARCH (gbp_fwd_node, gbp_fwd);
/* *INDENT-ON* */
static clib_error_t *
gbp_fwd_init (vlib_main_t * vm)
{
gbp_fwd_main_t *gpm = &gbp_fwd_main;
/* Initialize the feature next-node indices */
feat_bitmap_init_next_nodes (vm,
gbp_fwd_node.index,
L2INPUT_N_FEAT,
l2input_get_feat_names (),
gpm->l2_input_feat_next);
return 0;
}
VLIB_INIT_FUNCTION (gbp_fwd_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
