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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 <vlib/vlib.h>
#include <vnet/vnet.h>
#include "hicn.h"
#include "parser.h"
#include "strategy.h"
#include "strategy_dpo_ctx.h"
#include "face_db.h"
#include "infra.h"
#include "mgmt.h"
#include "pcs.h"
#include "state.h"
/*
* Node context data (to be used in all the strategy nodes); we think this is
* per-thread/instance
*/
typedef struct hicn_strategy_runtime_s
{
int id;
hicn_pit_cs_t *pitcs;
} hicn_strategy_runtime_t;
always_inline int
hicn_new_interest (hicn_strategy_runtime_t * rt, vlib_buffer_t * b0,
u32 * next, f64 tnow, u8 * nameptr,
u16 namelen, dpo_id_t * outface, int nh_idx,
index_t hicn_dpo_idx, hicn_strategy_vft_t * strategy,
dpo_type_t dpo_type, u8 isv6,
vl_api_hicn_api_node_stats_get_reply_t * stats)
{
int ret;
hicn_hash_node_t *nodep;
hicn_pcs_entry_t *pitp;
hicn_header_t *hicn0;
hicn_main_t *sm = &hicn_main;
hicn_buffer_t *hicnb0 = hicn_get_buffer (b0);
u32 node_id0 = 0;
u8 dpo_ctx_id0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
u8 vft_id0 = dpo_type;
u8 is_cs0 = 0;
u8 hash_entry_id = 0;
u8 bucket_is_overflow = 0;
u32 bucket_id = ~0;
/* Create PIT node and init PIT entry */
nodep = hicn_hashtb_alloc_node (rt->pitcs->pcs_table);
if (PREDICT_FALSE (nodep == NULL))
{
/* Nothing we can do - no mem */
*next = HICN_STRATEGY_NEXT_ERROR_DROP;
return HICN_ERROR_HASHTB_NOMEM;
}
pitp = hicn_pit_get_data (nodep);
hicn_pit_init_data (pitp);
pitp->shared.create_time = tnow;
hicn0 = vlib_buffer_get_current (b0);
hicn_lifetime_t imsg_lifetime;
hicn_type_t type = hicnb0->type;
hicn_ops_vft[type.l1]->get_lifetime (type, &hicn0->protocol,
&imsg_lifetime);
if (imsg_lifetime < sm->pit_lifetime_min_ms
|| imsg_lifetime > sm->pit_lifetime_max_ms)
{
imsg_lifetime = sm->pit_lifetime_dflt_ms;
}
pitp->shared.expire_time = hicn_pcs_get_exp_time (tnow, imsg_lifetime);
/* Set up the hash node and insert it */
hicn_hash_entry_t *hash_entry;
hicn_hashtb_init_node (rt->pitcs->pcs_table, nodep, nameptr, namelen);
ret =
hicn_pcs_pit_insert (rt->pitcs, pitp, nodep, &hash_entry,
hicnb0->name_hash, &node_id0, &dpo_ctx_id0, &vft_id0,
&is_cs0, &hash_entry_id, &bucket_id,
&bucket_is_overflow);
if (ret == HICN_ERROR_NONE)
{
strategy->hicn_add_interest (vnet_buffer (b0)->ip.adj_index[VLIB_TX],
hash_entry);
/* Add face */
hicn_face_db_add_face_dpo (&hicnb0->face_dpo_id, &(pitp->u.pit.faces));
/* Remove lock on the dpo stored in the vlib_buffer */
dpo_unlock (&hicnb0->face_dpo_id);
*next = outface->dpoi_next_node;
vnet_buffer (b0)->ip.adj_index[VLIB_TX] = outface->dpoi_index;
stats->pkts_interest_count++;
}
else
{
/* Interest aggregate in PIT */
if (ret == HICN_ERROR_HASHTB_EXIST)
{
hicn_store_internal_state (b0, hicnb0->name_hash, node_id0,
dpo_ctx_id0, vft_id0, hash_entry_id,
bucket_id, bucket_is_overflow);
*next =
is_cs0 ? HICN_STRATEGY_NEXT_INTEREST_HITCS :
HICN_STRATEGY_NEXT_INTEREST_HITPIT;
}
else
{
/* Send the packet to the interest-hitpit node */
*next = HICN_STRATEGY_NEXT_ERROR_DROP;
}
hicn_faces_flush (&(pitp->u.pit.faces));
hicn_hashtb_free_node (rt->pitcs->pcs_table, nodep);
}
return (ret);
}
/*
* ICN strategy later node for interests: - 1 packet at a time - ipv4/tcp
* ipv6/tcp
*/
uword
hicn_forward_interest_fn (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame,
hicn_strategy_vft_t * strategy,
dpo_type_t dpo_type,
vlib_node_registration_t * hicn_strategy_node)
{
u32 n_left_from, *from, *to_next, n_left_to_next;
hicn_strategy_next_t next_index;
hicn_strategy_runtime_t *rt;
vl_api_hicn_api_node_stats_get_reply_t stats = { 0 };
f64 tnow;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = (hicn_strategy_next_t) node->cached_next_index;
rt = vlib_node_get_runtime_data (vm, hicn_strategy_node->index);
rt->pitcs = &hicn_main.pitcs;
/* Capture time in vpp terms */
tnow = vlib_time_now (vm);
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
u8 isv6;
u8 *nameptr;
u16 namelen;
hicn_name_t name;
hicn_header_t *hicn0;
vlib_buffer_t *b0;
u32 bi0;
dpo_id_t *outface = NULL;
int nh_idx;
u32 next0 = next_index;
int ret;
/* Prefetch for next iteration. */
if (n_left_from > 1)
{
vlib_buffer_t *b1;
b1 = vlib_get_buffer (vm, from[1]);
CLIB_PREFETCH (b1, CLIB_CACHE_LINE_BYTES, LOAD);
CLIB_PREFETCH (&b1->trace_index, 2 * CLIB_CACHE_LINE_BYTES,
STORE);
}
/* Dequeue a packet buffer */
bi0 = from[0];
from += 1;
n_left_from -= 1;
to_next[0] = bi0;
to_next += 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
next0 = HICN_STRATEGY_NEXT_ERROR_DROP;
ret = hicn_interest_parse_pkt (b0, &name, &namelen, &hicn0, &isv6);
stats.pkts_processed++;
/* Select next hop */
/*
* Double check that the interest has been through
* the interest-pcslookup node due to misconfiguration in
* the punting rules.
*/
if (PREDICT_TRUE
(ret == HICN_ERROR_NONE && HICN_IS_NAMEHASH_CACHED (b0)
&& strategy->hicn_select_next_hop (vnet_buffer (b0)->ip.
adj_index[VLIB_TX], &nh_idx,
&outface) ==
HICN_ERROR_NONE))
{
/*
* No need to check if parsing was successful
* here. Already checked in the interest_pcslookup
* node
*/
nameptr = (u8 *) (&name);
hicn_new_interest (rt, b0, &next0, tnow, nameptr, namelen,
outface, nh_idx,
vnet_buffer (b0)->ip.adj_index[VLIB_TX],
strategy, dpo_type, isv6, &stats);
}
/* Maybe trace */
if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
(b0->flags & VLIB_BUFFER_IS_TRACED)))
{
hicn_strategy_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
t->pkt_type = HICN_PKT_TYPE_CONTENT;
t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
t->next_index = next0;
}
/*
* Verify speculative enqueue, maybe switch current
* next frame
*/
/*
* Fix in case of a wrong speculation. Needed for
* cloning the data in the right 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, hicn_strategy_node->index,
HICNFWD_ERROR_PROCESSED, stats.pkts_processed);
vlib_node_increment_counter (vm, hicn_strategy_node->index,
HICNFWD_ERROR_INTERESTS,
stats.pkts_interest_count);
return (frame->n_vectors);
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables: eval: (c-set-style "gnu") End:
*/
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