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/*
* ipsec_if_out.c : IPSec interface output node
*
* Copyright (c) 2015 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 <vnet/vnet.h>
#include <vnet/api_errno.h>
#include <vnet/ip/ip.h>
#include <vnet/ipsec/ipsec.h>
/* Statistics (not really errors) */
#define foreach_ipsec_if_output_error \
_(TX, "good packets transmitted")
static char *ipsec_if_output_error_strings[] = {
#define _(sym,string) string,
foreach_ipsec_if_output_error
#undef _
};
typedef enum
{
#define _(sym,str) IPSEC_IF_OUTPUT_ERROR_##sym,
foreach_ipsec_if_output_error
#undef _
IPSEC_IF_OUTPUT_N_ERROR,
} ipsec_if_output_error_t;
typedef struct
{
u32 spi;
u32 seq;
} ipsec_if_output_trace_t;
u8 *
format_ipsec_if_output_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 *);
ipsec_if_output_trace_t *t = va_arg (*args, ipsec_if_output_trace_t *);
s = format (s, "IPSec: spi %u seq %u", t->spi, t->seq);
return s;
}
static uword
ipsec_if_output_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
ipsec_main_t *im = &ipsec_main;
vnet_main_t *vnm = im->vnet_main;
u32 *from, *to_next = 0, next_index;
u32 n_left_from, sw_if_index0;
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 > 0 && n_left_to_next > 0)
{
u32 bi0, next0;
vlib_buffer_t *b0;
ipsec_tunnel_if_t *t0;
vnet_hw_interface_t *hi0;
bi0 = to_next[0] = from[0];
from += 1;
n_left_from -= 1;
to_next += 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
t0 = pool_elt_at_index (im->tunnel_interfaces, hi0->dev_instance);
vnet_buffer (b0)->ipsec.sad_index = t0->output_sa_index;
next0 = im->esp_encrypt_next_index;
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
ipsec_if_output_trace_t *tr =
vlib_add_trace (vm, node, b0, sizeof (*tr));
ipsec_sa_t *sa0 =
pool_elt_at_index (im->sad, t0->output_sa_index);
tr->spi = sa0->spi;
tr->seq = sa0->seq;
}
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_node_increment_counter (vm, ipsec_if_output_node.index,
IPSEC_IF_OUTPUT_ERROR_TX,
from_frame->n_vectors);
return from_frame->n_vectors;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ipsec_if_output_node) = {
.function = ipsec_if_output_node_fn,
.name = "ipsec-if-output",
.vector_size = sizeof (u32),
.format_trace = format_ipsec_if_output_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(ipsec_if_output_error_strings),
.error_strings = ipsec_if_output_error_strings,
.sibling_of = "ipsec-output-ip4",
};
/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (ipsec_if_output_node, ipsec_if_output_node_fn)
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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