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/*
* Copyright (c) 2017-2019 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 <vnet/udp/udp_encap.h>
typedef struct udp4_encap_trace_t_
{
udp_header_t udp;
ip4_header_t ip;
} udp4_encap_trace_t;
typedef struct udp6_encap_trace_t_
{
udp_header_t udp;
ip6_header_t ip;
} udp6_encap_trace_t;
extern vlib_combined_counter_main_t udp_encap_counters;
static u8 *
format_udp4_encap_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 *);
udp4_encap_trace_t *t;
t = va_arg (*args, udp4_encap_trace_t *);
s = format (s, "%U\n %U",
format_ip4_header, &t->ip, sizeof (t->ip),
format_udp_header, &t->udp, sizeof (t->udp));
return (s);
}
static u8 *
format_udp6_encap_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 *);
udp6_encap_trace_t *t;
t = va_arg (*args, udp6_encap_trace_t *);
s = format (s, "%U\n %U",
format_ip6_header, &t->ip, sizeof (t->ip),
format_udp_header, &t->udp, sizeof (t->udp));
return (s);
}
always_inline uword
udp_encap_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame, int is_encap_v6)
{
vlib_combined_counter_main_t *cm = &udp_encap_counters;
u32 *from = vlib_frame_vector_args (frame);
u32 n_left_from, n_left_to_next, *to_next, next_index;
u32 thread_index = vm->thread_index;
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from >= 4 && n_left_to_next >= 2)
{
vlib_buffer_t *b0, *b1;
udp_encap_t *ue0, *ue1;
u32 bi0, next0, uei0;
u32 bi1, next1, uei1;
/* Prefetch next iteration. */
{
vlib_buffer_t *p2, *p3;
p2 = vlib_get_buffer (vm, from[2]);
p3 = vlib_get_buffer (vm, from[3]);
vlib_prefetch_buffer_header (p2, STORE);
vlib_prefetch_buffer_header (p3, STORE);
}
bi0 = to_next[0] = from[0];
bi1 = to_next[1] = from[1];
from += 2;
n_left_from -= 2;
to_next += 2;
n_left_to_next -= 2;
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
uei0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
uei1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
vlib_increment_combined_counter (cm, thread_index, uei0, 1,
vlib_buffer_length_in_chain (vm,
b0));
vlib_increment_combined_counter (cm, thread_index, uei1, 1,
vlib_buffer_length_in_chain (vm,
b1));
/* Rewrite packet header and updates lengths. */
ue0 = udp_encap_get (uei0);
ue1 = udp_encap_get (uei1);
/* Paint */
if (is_encap_v6)
{
const u8 n_bytes =
sizeof (udp_header_t) + sizeof (ip6_header_t);
ip_udp_encap_two (vm, b0, b1, (u8 *) & ue0->ue_hdrs,
(u8 *) & ue1->ue_hdrs, n_bytes, 0);
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
udp6_encap_trace_t *tr =
vlib_add_trace (vm, node, b0, sizeof (*tr));
tr->udp = ue0->ue_hdrs.ip6.ue_udp;
tr->ip = ue0->ue_hdrs.ip6.ue_ip6;
}
if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
{
udp6_encap_trace_t *tr =
vlib_add_trace (vm, node, b1, sizeof (*tr));
tr->udp = ue1->ue_hdrs.ip6.ue_udp;
tr->ip = ue1->ue_hdrs.ip6.ue_ip6;
}
}
else
{
const u8 n_bytes =
sizeof (udp_header_t) + sizeof (ip4_header_t);
ip_udp_encap_two (vm, b0, b1,
(u8 *) & ue0->ue_hdrs,
(u8 *) & ue1->ue_hdrs, n_bytes, 1);
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
udp4_encap_trace_t *tr =
vlib_add_trace (vm, node, b0, sizeof (*tr));
tr->udp = ue0->ue_hdrs.ip4.ue_udp;
tr->ip = ue0->ue_hdrs.ip4.ue_ip4;
}
if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
{
udp4_encap_trace_t *tr =
vlib_add_trace (vm, node, b1, sizeof (*tr));
tr->udp = ue1->ue_hdrs.ip4.ue_udp;
tr->ip = ue1->ue_hdrs.ip4.ue_ip4;
}
}
next0 = ue0->ue_dpo.dpoi_next_node;
next1 = ue1->ue_dpo.dpoi_next_node;
vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ue0->ue_dpo.dpoi_index;
vnet_buffer (b1)->ip.adj_index[VLIB_TX] = ue1->ue_dpo.dpoi_index;
vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
to_next, n_left_to_next,
bi0, bi1, next0, next1);
}
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 bi0, next0, uei0;
vlib_buffer_t *b0;
udp_encap_t *ue0;
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);
uei0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
/* Rewrite packet header and updates lengths. */
ue0 = udp_encap_get (uei0);
vlib_increment_combined_counter (cm, thread_index, uei0, 1,
vlib_buffer_length_in_chain (vm,
b0));
/* Paint */
if (is_encap_v6)
{
const u8 n_bytes =
sizeof (udp_header_t) + sizeof (ip6_header_t);
ip_udp_encap_one (vm, b0, (u8 *) & ue0->ue_hdrs.ip6, n_bytes,
0);
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
udp6_encap_trace_t *tr =
vlib_add_trace (vm, node, b0, sizeof (*tr));
tr->udp = ue0->ue_hdrs.ip6.ue_udp;
tr->ip = ue0->ue_hdrs.ip6.ue_ip6;
}
}
else
{
const u8 n_bytes =
sizeof (udp_header_t) + sizeof (ip4_header_t);
ip_udp_encap_one (vm, b0, (u8 *) & ue0->ue_hdrs.ip4, n_bytes,
1);
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
udp4_encap_trace_t *tr =
vlib_add_trace (vm, node, b0, sizeof (*tr));
tr->udp = ue0->ue_hdrs.ip4.ue_udp;
tr->ip = ue0->ue_hdrs.ip4.ue_ip4;
}
}
next0 = ue0->ue_dpo.dpoi_next_node;
vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ue0->ue_dpo.dpoi_index;
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;
}
VLIB_NODE_FN (udp4_encap_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return udp_encap_inline (vm, node, frame, 0);
}
VLIB_NODE_FN (udp6_encap_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return udp_encap_inline (vm, node, frame, 1);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (udp4_encap_node) = {
.name = "udp4-encap",
.vector_size = sizeof (u32),
.format_trace = format_udp4_encap_trace,
.n_next_nodes = 0,
};
VLIB_REGISTER_NODE (udp6_encap_node) = {
.name = "udp6-encap",
.vector_size = sizeof (u32),
.format_trace = format_udp6_encap_trace,
.n_next_nodes = 0,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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