blob: 3c10bdf628c522e889ef73b7c23e627de7d0c52b [file] [log] [blame]
;;; plugin-node-skel.el - vpp engine plug-in "node.c" skeleton
;;;
;;; Copyright (c) 2016 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.
(require 'skeleton)
(define-skeleton skel-plugin-node
"Insert a plug-in 'node.c' skeleton "
nil
'(if (not (boundp 'plugin-name))
(setq plugin-name (read-string "Plugin name: ")))
'(setq PLUGIN-NAME (upcase plugin-name))
'(setq capital-oh-en "ON")
"/*
* node.c - skeleton vpp engine plug-in dual-loop node skeleton
*
* Copyright (c) <current-year> <your-organization>
* 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 <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
#include <vppinfra/error.h>
#include <" plugin-name "/" plugin-name ".h>
typedef struct
{
u32 next_index;
u32 sw_if_index;
u8 new_src_mac[6];
u8 new_dst_mac[6];
} " plugin-name "_trace_t;
#ifndef CLIB_MARCH_VARIANT
static u8 *
format_mac_address (u8 * s, va_list * args)
{
u8 *a = va_arg (*args, u8 *);
return format (s, \"%02x:%02x:%02x:%02x:%02x:%02x\",
a[0], a[1], a[2], a[3], a[4], a[5]);
}
/* packet trace format function */
static u8 * format_" plugin-name "_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 *);
" plugin-name "_trace_t * t = va_arg (*args, " plugin-name "_trace_t *);
s = format (s, \"" PLUGIN-NAME ": sw_if_index %d, next index %d\\n\",
t->sw_if_index, t->next_index);
s = format (s, \" new src %U -> new dst %U\",
format_mac_address, t->new_src_mac,
format_mac_address, t->new_dst_mac);
return s;
}
vlib_node_registration_t " plugin-name "_node;
#endif /* CLIB_MARCH_VARIANT */
#define foreach_" plugin-name "_error \\
_(SWAPPED, \"Mac swap packets processed\")
typedef enum {
#define _(sym,str) " PLUGIN-NAME "_ERROR_##sym,
foreach_" plugin-name "_error
#undef _
" PLUGIN-NAME "_N_ERROR,
} " plugin-name "_error_t;
#ifndef CLIB_MARCH_VARIANT
static char * " plugin-name "_error_strings[] =
{
#define _(sym,string) string,
foreach_" plugin-name "_error
#undef _
};
#endif /* CLIB_MARCH_VARIANT */
typedef enum
{
" PLUGIN-NAME "_NEXT_INTERFACE_OUTPUT,
" PLUGIN-NAME "_N_NEXT,
} " plugin-name "_next_t;
#define foreach_mac_address_offset \\
_(0) \\
_(1) \\
_(2) \\
_(3) \\
_(4) \\
_(5)
VLIB_NODE_FN (" plugin-name "_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
u32 n_left_from, * from, * to_next;
" plugin-name "_next_t next_index;
u32 pkts_swapped = 0;
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 >= 4 && n_left_to_next >= 2)
{
u32 next0 = " PLUGIN-NAME "_NEXT_INTERFACE_OUTPUT;
u32 next1 = " PLUGIN-NAME "_NEXT_INTERFACE_OUTPUT;
u32 sw_if_index0, sw_if_index1;
u8 tmp0[6], tmp1[6];
ethernet_header_t *en0, *en1;
u32 bi0, bi1;
vlib_buffer_t * b0, * b1;
/* 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, LOAD);
vlib_prefetch_buffer_header (p3, LOAD);
CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
}
/* speculatively enqueue b0 and b1 to the current next frame */
to_next[0] = bi0 = from[0];
to_next[1] = bi1 = from[1];
from += 2;
to_next += 2;
n_left_from -= 2;
n_left_to_next -= 2;
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
ASSERT (b0->current_data == 0);
ASSERT (b1->current_data == 0);
en0 = vlib_buffer_get_current (b0);
en1 = vlib_buffer_get_current (b1);
/* This is not the fastest way to swap src + dst mac addresses */
#define _(a) tmp0[a] = en0->src_address[a];
foreach_mac_address_offset;
#undef _
#define _(a) en0->src_address[a] = en0->dst_address[a];
foreach_mac_address_offset;
#undef _
#define _(a) en0->dst_address[a] = tmp0[a];
foreach_mac_address_offset;
#undef _
#define _(a) tmp1[a] = en1->src_address[a];
foreach_mac_address_offset;
#undef _
#define _(a) en1->src_address[a] = en1->dst_address[a];
foreach_mac_address_offset;
#undef _
#define _(a) en1->dst_address[a] = tmp1[a];
foreach_mac_address_offset;
#undef _
sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
/* Send pkt back out the RX interface */
vnet_buffer(b0)->sw_if_index[VLIB_TX] = sw_if_index0;
vnet_buffer(b1)->sw_if_index[VLIB_TX] = sw_if_index1;
pkts_swapped += 2;
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)))
{
if (b0->flags & VLIB_BUFFER_IS_TRACED)
{
" plugin-name "_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
t->sw_if_index = sw_if_index0;
t->next_index = next0;
clib_memcpy (t->new_src_mac, en0->src_address,
sizeof (t->new_src_mac));
clib_memcpy (t->new_dst_mac, en0->dst_address,
sizeof (t->new_dst_mac));
}
if (b1->flags & VLIB_BUFFER_IS_TRACED)
{
" plugin-name "_trace_t *t =
vlib_add_trace (vm, node, b1, sizeof (*t));
t->sw_if_index = sw_if_index1;
t->next_index = next1;
clib_memcpy (t->new_src_mac, en1->src_address,
sizeof (t->new_src_mac));
clib_memcpy (t->new_dst_mac, en1->dst_address,
sizeof (t->new_dst_mac));
}
}
/* verify speculative enqueues, maybe switch current next frame */
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;
vlib_buffer_t * b0;
u32 next0 = " PLUGIN-NAME "_NEXT_INTERFACE_OUTPUT;
u32 sw_if_index0;
u8 tmp0[6];
ethernet_header_t *en0;
/* speculatively enqueue b0 to the current next frame */
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);
/*
* Direct from the driver, we should be at offset 0
* aka at &b0->data[0]
*/
ASSERT (b0->current_data == 0);
en0 = vlib_buffer_get_current (b0);
/* This is not the fastest way to swap src + dst mac addresses */
#define _(a) tmp0[a] = en0->src_address[a];
foreach_mac_address_offset;
#undef _
#define _(a) en0->src_address[a] = en0->dst_address[a];
foreach_mac_address_offset;
#undef _
#define _(a) en0->dst_address[a] = tmp0[a];
foreach_mac_address_offset;
#undef _
sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
/* Send pkt back out the RX interface */
vnet_buffer(b0)->sw_if_index[VLIB_TX] = sw_if_index0;
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
&& (b0->flags & VLIB_BUFFER_IS_TRACED))) {
" plugin-name "_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
t->sw_if_index = sw_if_index0;
t->next_index = next0;
clib_memcpy (t->new_src_mac, en0->src_address,
sizeof (t->new_src_mac));
clib_memcpy (t->new_dst_mac, en0->dst_address,
sizeof (t->new_dst_mac));
}
pkts_swapped += 1;
/* 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);
}
vlib_node_increment_counter (vm, " plugin-name "_node.index,
" PLUGIN-NAME "_ERROR_SWAPPED, pkts_swapped);
return frame->n_vectors;
}
/* *INDENT-OFF* */
#ifndef CLIB_MARCH_VARIANT
VLIB_REGISTER_NODE (" plugin-name "_node) =
{
.name = \"" plugin-name "\",
.vector_size = sizeof (u32),
.format_trace = format_" plugin-name "_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(" plugin-name "_error_strings),
.error_strings = " plugin-name "_error_strings,
.n_next_nodes = " PLUGIN-NAME "_N_NEXT,
/* edit / add dispositions here */
.next_nodes = {
[" PLUGIN-NAME "_NEXT_INTERFACE_OUTPUT] = \"interface-output\",
},
};
#endif /* CLIB_MARCH_VARIANT */
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: " capital-oh-en "
*
* Local Variables:
* eval: (c-set-style \"gnu\")
* End:
*/
")