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/*
* 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.
*/
#include <vnet/cop/cop.h>
#include <vnet/fib/ip6_fib.h>
#include <vnet/dpo/load_balance.h>
typedef struct {
u32 next_index;
u32 sw_if_index;
} ip6_cop_whitelist_trace_t;
/* packet trace format function */
static u8 * format_ip6_cop_whitelist_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 *);
ip6_cop_whitelist_trace_t * t = va_arg (*args, ip6_cop_whitelist_trace_t *);
s = format (s, "IP6_COP_WHITELIST: sw_if_index %d, next index %d",
t->sw_if_index, t->next_index);
return s;
}
#define foreach_ip6_cop_whitelist_error \
_(DROPPED, "ip6 cop whitelist packets dropped")
typedef enum {
#define _(sym,str) IP6_COP_WHITELIST_ERROR_##sym,
foreach_ip6_cop_whitelist_error
#undef _
IP6_COP_WHITELIST_N_ERROR,
} ip6_cop_whitelist_error_t;
static char * ip6_cop_whitelist_error_strings[] = {
#define _(sym,string) string,
foreach_ip6_cop_whitelist_error
#undef _
};
VLIB_NODE_FN (ip6_cop_whitelist_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
u32 n_left_from, * from, * to_next;
cop_feature_type_t next_index;
cop_main_t *cm = &cop_main;
ip6_main_t * im6 = &ip6_main;
vlib_combined_counter_main_t * vcm = &load_balance_main.lbm_via_counters;
u32 thread_index = vm->thread_index;
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 bi0, bi1;
vlib_buffer_t * b0, * b1;
u32 next0, next1;
u32 sw_if_index0, sw_if_index1;
ip6_header_t * ip0, * ip1;
cop_config_main_t * ccm0, * ccm1;
cop_config_data_t * c0, * c1;
u32 lb_index0, lb_index1;
const load_balance_t * lb0, *lb1;
const dpo_id_t *dpo0, *dpo1;
/* 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);
sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
ip0 = vlib_buffer_get_current (b0);
ccm0 = cm->cop_config_mains + VNET_COP_IP6;
c0 = vnet_get_config_data
(&ccm0->config_main,
&vnet_buffer (b0)->cop.current_config_index,
&next0,
sizeof (c0[0]));
lb_index0 = ip6_fib_table_fwding_lookup (im6, c0->fib_index,
&ip0->src_address);
lb0 = load_balance_get (lb_index0);
dpo0 = load_balance_get_bucket_i(lb0, 0);
if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
{
b0->error = node->errors[IP6_COP_WHITELIST_ERROR_DROPPED];
next0 = RX_COP_DROP;
}
b1 = vlib_get_buffer (vm, bi1);
sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
ip1 = vlib_buffer_get_current (b1);
ccm1 = cm->cop_config_mains + VNET_COP_IP6;
c1 = vnet_get_config_data
(&ccm1->config_main,
&vnet_buffer (b1)->cop.current_config_index,
&next1,
sizeof (c1[0]));
lb_index1 = ip6_fib_table_fwding_lookup (im6, c1->fib_index,
&ip1->src_address);
lb1 = load_balance_get (lb_index1);
dpo1 = load_balance_get_bucket_i(lb1, 0);
vlib_increment_combined_counter
(vcm, thread_index, lb_index0, 1,
vlib_buffer_length_in_chain (vm, b0)
+ sizeof(ethernet_header_t));
vlib_increment_combined_counter
(vcm, thread_index, lb_index1, 1,
vlib_buffer_length_in_chain (vm, b1)
+ sizeof(ethernet_header_t));
if (PREDICT_FALSE(dpo1->dpoi_type != DPO_RECEIVE))
{
b1->error = node->errors[IP6_COP_WHITELIST_ERROR_DROPPED];
next1 = RX_COP_DROP;
}
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
&& (b0->flags & VLIB_BUFFER_IS_TRACED)))
{
ip6_cop_whitelist_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
t->sw_if_index = sw_if_index0;
t->next_index = next0;
}
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
&& (b1->flags & VLIB_BUFFER_IS_TRACED)))
{
ip6_cop_whitelist_trace_t *t =
vlib_add_trace (vm, node, b1, sizeof (*t));
t->sw_if_index = sw_if_index1;
t->next_index = next1;
}
/* 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;
u32 sw_if_index0;
ip6_header_t * ip0;
cop_config_main_t *ccm0;
cop_config_data_t *c0;
u32 lb_index0;
const load_balance_t * lb0;
const dpo_id_t *dpo0;
/* 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);
sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
ip0 = vlib_buffer_get_current (b0);
ccm0 = cm->cop_config_mains + VNET_COP_IP6;
c0 = vnet_get_config_data
(&ccm0->config_main,
&vnet_buffer (b0)->cop.current_config_index,
&next0,
sizeof (c0[0]));
lb_index0 = ip6_fib_table_fwding_lookup (im6, c0->fib_index,
&ip0->src_address);
lb0 = load_balance_get (lb_index0);
dpo0 = load_balance_get_bucket_i(lb0, 0);
vlib_increment_combined_counter
(vcm, thread_index, lb_index0, 1,
vlib_buffer_length_in_chain (vm, b0)
+ sizeof(ethernet_header_t));
if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
{
b0->error = node->errors[IP6_COP_WHITELIST_ERROR_DROPPED];
next0 = RX_COP_DROP;
}
if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
&& (b0->flags & VLIB_BUFFER_IS_TRACED)))
{
ip6_cop_whitelist_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
t->sw_if_index = sw_if_index0;
t->next_index = next0;
}
/* 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;
}
VLIB_REGISTER_NODE (ip6_cop_whitelist_node) = {
.name = "ip6-cop-whitelist",
.vector_size = sizeof (u32),
.format_trace = format_ip6_cop_whitelist_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(ip6_cop_whitelist_error_strings),
.error_strings = ip6_cop_whitelist_error_strings,
.n_next_nodes = COP_RX_N_FEATURES,
/* edit / add dispositions here */
.next_nodes = {
[IP4_RX_COP_WHITELIST] = "ip4-cop-whitelist",
[IP6_RX_COP_WHITELIST] = "ip6-cop-whitelist",
[DEFAULT_RX_COP_WHITELIST] = "default-cop-whitelist",
[IP4_RX_COP_INPUT] = "ip4-input",
[IP6_RX_COP_INPUT] = "ip6-input",
[DEFAULT_RX_COP_INPUT] = "ethernet-input",
[RX_COP_DROP] = "error-drop",
},
};
static clib_error_t *
ip6_whitelist_init (vlib_main_t * vm)
{
return 0;
}
VLIB_INIT_FUNCTION (ip6_whitelist_init);
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