diff options
Diffstat (limited to 'hicn-plugin/src/interest_hitpit_node.c')
| -rwxr-xr-x | hicn-plugin/src/interest_hitpit_node.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/hicn-plugin/src/interest_hitpit_node.c b/hicn-plugin/src/interest_hitpit_node.c new file mode 100755 index 000000000..21ba97db3 --- /dev/null +++ b/hicn-plugin/src/interest_hitpit_node.c @@ -0,0 +1,313 @@ +/* + * 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/ip/ip6_packet.h> + +#include "interest_hitpit.h" +#include "mgmt.h" +#include "parser.h" +#include "data_fwd.h" +#include "infra.h" +#include "strategy.h" +#include "strategy_dpo_ctx.h" +#include "strategy_dpo_manager.h" +#include "state.h" +#include "error.h" +#include "face_db.h" + +/* packet trace format function */ +static u8 *hicn_interest_hitpit_format_trace (u8 * s, va_list * args); + +/* Stats string values */ +static char *hicn_interest_hitpit_error_strings[] = { +#define _(sym, string) string, + foreach_hicnfwd_error +#undef _ +}; + +vlib_node_registration_t hicn_interest_hitpit_node; + +always_inline void drop_packet (u32 * next0); + +/* + * hICN forwarder node for interests hitting the PIT + */ +static uword +hicn_interest_hitpit_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + u32 n_left_from, *from, *to_next; + hicn_interest_hitpit_next_t next_index; + hicn_interest_hitpit_runtime_t *rt; + vl_api_hicn_api_node_stats_get_reply_t stats = { 0 }; + f64 tnow; + + rt = vlib_node_get_runtime_data (vm, hicn_interest_hitpit_node.index); + + if (PREDICT_FALSE (rt->pitcs == NULL)) + { + rt->pitcs = &hicn_main.pitcs; + } + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + /* Capture time in vpp terms */ + tnow = vlib_time_now (vm); + + 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) + { + vlib_buffer_t *b0; + u8 isv6; + u8 *nameptr; + u16 namelen; + u32 bi0; + u32 next0 = HICN_INTEREST_HITPIT_NEXT_ERROR_DROP; + hicn_name_t name; + hicn_header_t *hicn0; + hicn_hash_node_t *node0; + const hicn_strategy_vft_t *strategy_vft0; + const hicn_dpo_vft_t *dpo_vft0; + hicn_pcs_entry_t *pitp; + u8 dpo_ctx_id0; + u8 found = 0; + int nh_idx; + dpo_id_t *outface; + hicn_hash_entry_t *hash_entry0; + hicn_buffer_t *hicnb0; + 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->data, 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); + + /* Get hicn buffer and state */ + hicnb0 = hicn_get_buffer (b0); + hicn_get_internal_state (hicnb0, rt->pitcs, &node0, &strategy_vft0, + &dpo_vft0, &dpo_ctx_id0, &hash_entry0); + + + ret = hicn_interest_parse_pkt (b0, &name, &namelen, &hicn0, &isv6); + nameptr = (u8 *) (&name); + pitp = hicn_pit_get_data (node0); + dpo_id_t hicn_dpo_id0 = + { dpo_vft0->hicn_dpo_get_type (), 0, 0, dpo_ctx_id0 }; + + /* + * Check if the hit is instead a collision in the + * hash table. Unlikely to happen. + */ + if (PREDICT_FALSE + (ret != HICN_ERROR_NONE + || !hicn_node_compare (nameptr, namelen, node0))) + { + stats.interests_hash_collision++; + /* Remove lock from the entry */ + hicn_pcs_remove_lock (rt->pitcs, &pitp, &node0, vm, hash_entry0, + dpo_vft0, &hicn_dpo_id0); + drop_packet (&next0); + + goto end_processing; + } + /* + * If the entry is expired, remove it no matter of + * the possible cases. + */ + if (tnow > pitp->shared.expire_time) + { + strategy_vft0->hicn_on_interest_timeout (dpo_ctx_id0); + hicn_pcs_delete (rt->pitcs, &pitp, &node0, vm, hash_entry0, + dpo_vft0, &hicn_dpo_id0); + stats.pit_expired_count++; + next0 = + isv6 ? HICN_INTEREST_HITPIT_NEXT_IP6_LOOKUP : + HICN_INTEREST_HITPIT_NEXT_IP4_LOOKUP; + } + else + { + if ((hash_entry0->he_flags & HICN_HASH_ENTRY_FLAG_CS_ENTRY)) + { + next0 = HICN_INTEREST_HITPIT_NEXT_INTEREST_HITCS; + } + else + { + /* + * Distinguish between aggregation or + * retransmission + */ + + found = + hicn_face_search (&(hicnb0->face_dpo_id), + &(pitp->u.pit.faces)); + + if (found) + { + /* + * Remove lock on the dpo + * stored in the vlib_buffer + */ + dpo_unlock (&hicnb0->face_dpo_id); + strategy_vft0->hicn_select_next_hop (dpo_ctx_id0, + &nh_idx, &outface); + /* Retransmission */ + /* + * Prepare the packet for the + * forwarding + */ + next0 = outface->dpoi_next_node; + vnet_buffer (b0)->ip.adj_index[VLIB_TX] = + outface->dpoi_index; + + /* + * Update the egress face in + * the PIT + */ + pitp->u.pit.pe_txnh = nh_idx; + stats.interests_retx++; + } + else + { + hicn_face_db_add_face_dpo (&hicnb0->face_dpo_id, + &pitp->u.pit.faces); + + /* Aggregation */ + drop_packet (&next0); + stats.interests_aggregated++; + } + /* Remove lock from the entry */ + hicn_pcs_remove_lock (rt->pitcs, &pitp, &node0, vm, + hash_entry0, dpo_vft0, &hicn_dpo_id0); + + } + } + end_processing: + + /* Maybe trace */ + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && + (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + hicn_interest_hitpit_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->pkt_type = HICN_PKT_TYPE_INTEREST; + t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + t->next_index = next0; + } + /* Incr packet counter */ + stats.pkts_processed += 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); + } + u32 pit_int_count = hicn_pit_get_int_count (rt->pitcs); + + + vlib_node_increment_counter (vm, hicn_interest_hitpit_node.index, + HICNFWD_ERROR_PROCESSED, stats.pkts_processed); + vlib_node_increment_counter (vm, hicn_interest_hitpit_node.index, + HICNFWD_ERROR_INTEREST_AGG, + stats.interests_aggregated); + vlib_node_increment_counter (vm, hicn_interest_hitpit_node.index, + HICNFWD_ERROR_INT_RETRANS, + stats.interests_retx); + vlib_node_increment_counter (vm, hicn_interest_hitpit_node.index, + HICNFWD_ERROR_PIT_EXPIRED, + stats.pit_expired_count); + vlib_node_increment_counter (vm, hicn_interest_hitpit_node.index, + HICNFWD_ERROR_HASH_COLL_HASHTB_COUNT, + stats.interests_hash_collision); + + update_node_counter (vm, hicn_interest_hitpit_node.index, + HICNFWD_ERROR_INT_COUNT, pit_int_count); + + return (frame->n_vectors); +} + +/* packet trace format function */ +static u8 * +hicn_interest_hitpit_format_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 *); + hicn_interest_hitpit_trace_t *t = + va_arg (*args, hicn_interest_hitpit_trace_t *); + + s = format (s, "INTEREST-HITPIT: pkt: %d, sw_if_index %d, next index %d", + (int) t->pkt_type, t->sw_if_index, t->next_index); + return (s); +} + +void +drop_packet (u32 * next0) +{ + *next0 = HICN_INTEREST_HITPIT_NEXT_ERROR_DROP; +} + +/* + * Node registration for the interest forwarder node + */ +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE(hicn_interest_hitpit_node) = +{ + .function = hicn_interest_hitpit_node_fn, + .name = "hicn-interest-hitpit", + .vector_size = sizeof(u32), + .runtime_data_bytes = sizeof(hicn_interest_hitpit_runtime_t), + .format_trace = hicn_interest_hitpit_format_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN(hicn_interest_hitpit_error_strings), + .error_strings = hicn_interest_hitpit_error_strings, + .n_next_nodes = HICN_INTEREST_HITPIT_N_NEXT, + /* edit / add dispositions here */ + .next_nodes = + { + [HICN_INTEREST_HITPIT_NEXT_INTEREST_HITCS] = "hicn-interest-hitcs", + [HICN_INTEREST_HITPIT_NEXT_IP4_LOOKUP] = "ip4-lookup", + [HICN_INTEREST_HITPIT_NEXT_IP6_LOOKUP] = "ip6-lookup", + [HICN_INTEREST_HITPIT_NEXT_ERROR_DROP] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: eval: (c-set-style "gnu") End: + */ |