/*
*------------------------------------------------------------------
* Copyright (c) 2017 Intel 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 pemplied.
* See the License for the specific language governing permissions and
* lpemitations under the License.
*------------------------------------------------------------------
*/
#include <vlib/vlib.h>
#include <vnet/ppp/packet.h>
#include <pppoe/pppoe.h>
#define foreach_pppoe_cp_next \
_(DROP, "error-drop") \
_(INTERFACE, "interface-output" ) \
typedef enum
{
#define _(s,n) PPPOE_CP_NEXT_##s,
foreach_pppoe_cp_next
#undef _
PPPOE_CP_N_NEXT,
} pppoe_cp_next_t;
typedef struct {
u32 next_index;
u32 sw_if_index;
u32 cp_if_index;
u8 pppoe_code;
u16 ppp_proto;
u32 error;
} pppoe_cp_trace_t;
static u8 * format_pppoe_cp_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 *);
pppoe_cp_trace_t * t = va_arg (*args, pppoe_cp_trace_t *);
pppoe_main_t * pem = &pppoe_main;
if (t->sw_if_index != pem->cp_if_index)
{
s = format (s, "PPPoE dispatch from sw_if_index %d next %d error %d \n"
" pppoe_code 0x%x ppp_proto 0x%x",
t->sw_if_index, t->next_index, t->error,
t->pppoe_code, t->ppp_proto);
}
else
{
s = format (s, "PPPoE dispatch from cp_if_index %d next %d error %d \n"
" pppoe_code 0x%x ppp_proto 0x%x",
t->cp_if_index, t->next_index, t->error,
t->pppoe_code, t->ppp_proto);
}
return s;
}
VLIB_NODE_FN (pppoe_cp_dispatch_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
u32 n_left_from, next_index, * from, * to_next;
pppoe_main_t * pem = &pppoe_main;
vnet_main_t * vnm = pem->vnet_main;
vnet_interface_main_t * im = &vnm->interface_main;
u32 pkts_decapsulated = 0;
u32 thread_index = vlib_get_thread_index();
u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
pppoe_entry_key_t cached_key;
pppoe_entry_result_t cached_result;
from = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
/* Clear the one-entry cache in case session table was updated */
cached_key.raw = ~0;
cached_result.raw = ~0; /* warning be gone */
next_index = node->cached_next_index;
stats_sw_if_index = node->runtime_data[0];
stats_n_packets = stats_n_bytes = 0;
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;
vlib_buffer_t * b0;
ethernet_header_t *h0;
pppoe_header_t * pppoe0;
pppoe_entry_key_t key0;
pppoe_entry_result_t result0;
u32 bucket0;
u32 next0;
u32 error0 = 0;
u32 rx_sw_if_index0=~0, tx_sw_if_index0=~0, len0;
vnet_hw_interface_t *hi;
vnet_sw_interface_t *si;
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);
/* leaves current_data pointing at the pppoe header */
pppoe0 = vlib_buffer_get_current (b0);
rx_sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
if (PREDICT_FALSE (pppoe0->ver_type != PPPOE_VER_TYPE))
{
error0 = PPPOE_ERROR_BAD_VER_TYPE;
next0 = PPPOE_INPUT_NEXT_DROP;
goto trace00;
}
vlib_buffer_reset(b0);
h0 = vlib_buffer_get_current (b0);
if(rx_sw_if_index0 == pem->cp_if_index)
{
pppoe_lookup_1 (&pem->link_table, &cached_key, &cached_result,
h0->dst_address, 0,
&key0, &bucket0, &result0);
tx_sw_if_index0 = result0.fields.sw_if_index;
if (PREDICT_FALSE (tx_sw_if_index0 == ~0))
{
error0 = PPPOE_ERROR_NO_SUCH_SESSION;
next0 = PPPOE_INPUT_NEXT_DROP;
goto trace00;
}
next0 = PPPOE_CP_NEXT_INTERFACE;
vnet_buffer(b0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
/* set src mac address */
si = vnet_get_sw_interface(vnm, tx_sw_if_index0);
hi = vnet_get_hw_interface (vnm, si->hw_if_index);
clib_memcpy_fast (vlib_buffer_get_current (b0)+6, hi->hw_address, 6);
}
else
{
pppoe_lookup_1 (&pem->link_table, &cached_key, &cached_result,
h0->src_address, 0,
&key0, &bucket0, &result0);
tx_sw_if_index0 = result0.fields.sw_if_index;
/* learn client session */
pppoe_learn_process (&pem->link_table, rx_sw_if_index0,
&key0, &cached_key,
&bucket0, &result0);
next0 = PPPOE_CP_NEXT_INTERFACE;
vnet_buffer(b0)->sw_if_index[VLIB_TX] = pem->cp_if_index;
}
len0 = vlib_buffer_length_in_chain (vm, b0);
pkts_decapsulated ++;
stats_n_packets += 1;
stats_n_bytes += len0;
/* Batch stats increment on the same pppoe session so counter
is not incremented per packet */
if (PREDICT_FALSE (rx_sw_if_index0 != stats_sw_if_index))
{
stats_n_packets -= 1;
stats_n_bytes -= len0;
if (stats_n_packets)
vlib_increment_combined_counter
(im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
thread_index, stats_sw_if_index,
stats_n_packets, stats_n_bytes);
stats_n_packets = 1;
stats_n_bytes = len0;
stats_sw_if_index = rx_sw_if_index0;
}
trace00:
b0->error = error0 ? node->errors[error0] : 0;
if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
{
pppoe_cp_trace_t *tr
= vlib_add_trace (vm, node, b0, sizeof (*tr));
tr->next_index = next0;
tr->error = error0;
tr->sw_if_index = tx_sw_if_index0;
tr->cp_if_index = pem->cp_if_index;
tr->pppoe_code = pppoe0->code;
tr->ppp_proto = clib_net_to_host_u16(pppoe0->ppp_proto);
}
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);
}
/* Do we still need this now that session tx stats is kept? */
vlib_node_increment_counter (vm, pppoe_input_node.index,
PPPOE_ERROR_DECAPSULATED,
pkts_decapsulated);
/* Increment any remaining batch stats */
if (stats_n_packets)
{
vlib_increment_combined_counter
(im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
node->runtime_data[0] = stats_sw_if_index;
}
return from_frame->n_vectors;
}
VLIB_REGISTER_NODE (pppoe_cp_dispatch_node) = {
.name = "pppoe-cp-dispatch",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
.n_next_nodes = PPPOE_CP_N_NEXT,
.next_nodes = {
#define _(s,n) [PPPOE_CP_NEXT_##s] = n,
foreach_pppoe_cp_next
#undef _
},
.format_trace = format_pppoe_cp_trace,
};
