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/*
* Copyright (c) 2019 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_vxlan.h>
#include <plugins/gbp/gbp_itf.h>
#include <plugins/gbp/gbp_learn.h>
#include <plugins/gbp/gbp_bridge_domain.h>
#include <plugins/gbp/gbp_route_domain.h>
#include <plugins/gbp/gbp_sclass.h>
#include <vnet/vxlan-gbp/vxlan_gbp.h>
#include <vlibmemory/api.h>
#include <vnet/fib/fib_table.h>
extern uword *gv_db;
typedef struct gbp_vxlan_trace_t_
{
u8 dropped;
u32 vni;
u32 sw_if_index;
u16 sclass;
u8 flags;
} gbp_vxlan_trace_t;
#define foreach_gbp_vxlan_input_next \
_(DROP, "error-drop") \
_(L2_INPUT, "l2-input") \
_(IP4_INPUT, "ip4-input") \
_(IP6_INPUT, "ip6-input")
typedef enum
{
#define _(s,n) GBP_VXLAN_INPUT_NEXT_##s,
foreach_gbp_vxlan_input_next
#undef _
GBP_VXLAN_INPUT_N_NEXT,
} gbp_vxlan_input_next_t;
#define foreach_gbp_vxlan_error \
_(DECAPPED, "decapped") \
_(LEARNED, "learned")
typedef enum
{
#define _(s,n) GBP_VXLAN_ERROR_##s,
foreach_gbp_vxlan_error
#undef _
GBP_VXLAN_N_ERROR,
} gbp_vxlan_input_error_t;
static char *gbp_vxlan_error_strings[] = {
#define _(n,s) s,
foreach_gbp_vxlan_error
#undef _
};
static uword
gbp_vxlan_decap (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame, u8 is_ip4)
{
u32 n_left_to_next, n_left_from, next_index, *to_next, *from;
next_index = 0;
from = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
vxlan_gbp_header_t *vxlan_gbp0;
gbp_vxlan_input_next_t next0;
gbp_vxlan_tunnel_t *gt0;
vlib_buffer_t *b0;
u32 bi0, vni0;
uword *p;
bi0 = to_next[0] = from[0];
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
next0 = GBP_VXLAN_INPUT_NEXT_DROP;
b0 = vlib_get_buffer (vm, bi0);
vxlan_gbp0 =
vlib_buffer_get_current (b0) - sizeof (vxlan_gbp_header_t);
vni0 = vxlan_gbp_get_vni (vxlan_gbp0);
p = hash_get (gv_db, vni0);
if (PREDICT_FALSE (NULL == p))
{
gt0 = NULL;
next0 = GBP_VXLAN_INPUT_NEXT_DROP;
}
else
{
gt0 = gbp_vxlan_tunnel_get (p[0]);
vnet_buffer (b0)->sw_if_index[VLIB_RX] = gt0->gt_sw_if_index;
if (GBP_VXLAN_TUN_L2 == gt0->gt_layer)
/*
* An L2 layer tunnel goes into the BD
*/
next0 = GBP_VXLAN_INPUT_NEXT_L2_INPUT;
else
{
/*
* An L3 layer tunnel needs to strip the L2 header
* an inject into the RD
*/
ethernet_header_t *e0;
u16 type0;
e0 = vlib_buffer_get_current (b0);
type0 = clib_net_to_host_u16 (e0->type);
switch (type0)
{
case ETHERNET_TYPE_IP4:
next0 = GBP_VXLAN_INPUT_NEXT_IP4_INPUT;
break;
case ETHERNET_TYPE_IP6:
next0 = GBP_VXLAN_INPUT_NEXT_IP6_INPUT;
break;
default:
goto trace;
}
vlib_buffer_advance (b0, sizeof (*e0));
}
}
trace:
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
gbp_vxlan_trace_t *tr;
tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
tr->dropped = (next0 == GBP_VXLAN_INPUT_NEXT_DROP);
tr->vni = vni0;
tr->sw_if_index = (gt0 ? gt0->gt_sw_if_index : ~0);
tr->flags = vxlan_gbp_get_gpflags (vxlan_gbp0);
tr->sclass = vxlan_gbp_get_sclass (vxlan_gbp0);
}
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 from_frame->n_vectors;
}
VLIB_NODE_FN (gbp_vxlan4_input_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
return gbp_vxlan_decap (vm, node, from_frame, 1);
}
static u8 *
format_gbp_vxlan_rx_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_vxlan_trace_t *t = va_arg (*args, gbp_vxlan_trace_t *);
s = format (s, "vni:%d dropped:%d rx:%d sclass:%d flags:%U",
t->vni, t->dropped, t->sw_if_index,
t->sclass, format_vxlan_gbp_header_gpflags, t->flags);
return (s);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (gbp_vxlan4_input_node) =
{
.name = "gbp-vxlan4",
.vector_size = sizeof (u32),
.n_errors = GBP_VXLAN_N_ERROR,
.error_strings = gbp_vxlan_error_strings,
.n_next_nodes = GBP_VXLAN_INPUT_N_NEXT,
.format_trace = format_gbp_vxlan_rx_trace,
.next_nodes = {
#define _(s,n) [GBP_VXLAN_INPUT_NEXT_##s] = n,
foreach_gbp_vxlan_input_next
#undef _
},
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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