diff options
Diffstat (limited to 'hicn-plugin/src/mapme_ack_node.c')
| -rw-r--r-- | hicn-plugin/src/mapme_ack_node.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/hicn-plugin/src/mapme_ack_node.c b/hicn-plugin/src/mapme_ack_node.c new file mode 100644 index 000000000..f26895d20 --- /dev/null +++ b/hicn-plugin/src/mapme_ack_node.c @@ -0,0 +1,234 @@ +/* + * Copyright (c) 2017-2020 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 "hicn.h" +#include "mapme.h" +#include "mapme_ack.h" +#include "mapme_eventmgr.h" +#include "mgmt.h" +#include "parser.h" +#include "data_fwd.h" +#include "infra.h" +#include "strategy_dpo_manager.h" +#include "error.h" +#include "state.h" + +extern hicn_mapme_main_t mapme_main; + +/* packet trace format function */ +static u8 *hicn_mapme_ack_format_trace (u8 * s, va_list * args); + + +/* Stats string values */ +static char *hicn_mapme_ack_error_strings[] = { +#define _(sym, string) string, + foreach_hicnfwd_error +#undef _ +}; + +/* + * @brief Process incoming ack messages (Interest Update Ack) + * @param vm vlib main data structure + * @param b Control packet (IU) + * @param face_id Ingress face id + */ +bool +hicn_mapme_process_ack (vlib_main_t * vm, vlib_buffer_t * b, + hicn_face_id_t in_face) +{ + seq_t fib_seq; + const dpo_id_t *dpo; + hicn_prefix_t prefix; + mapme_params_t params; + int rc; + + /* Parse incoming message */ + rc = + hicn_mapme_parse_packet (vlib_buffer_get_current (b), &prefix, ¶ms); + if (rc < 0) + goto ERR_PARSE; + + /* if (params.seq == INVALID_SEQ) */ + /* { */ + /* DEBUG ("Invalid sequence number found in IU"); */ + /* return true; */ + /* } */ + + dpo = fib_epm_lookup (&(prefix.name), prefix.len); + if (!dpo) + { + DEBUG ("Ignored ACK for non-existing FIB entry. Ignored."); + return true; + + } + + /* We are only expecting ACKs for hICN DPOs */ + ASSERT (dpo_is_hicn (dpo)); + + hicn_mapme_tfib_t *tfib = + TFIB (hicn_strategy_dpo_ctx_get (dpo->dpoi_index)); + + if (tfib == NULL) + { + WARN ("Unable to get strategy ctx."); + return false; + } + + fib_seq = tfib->seq; + + /* + * As we always retransmit IU with the latest seq, we are not interested in + * ACKs with inferior seq + */ + if (params.seq < fib_seq) + { + DEBUG ("Ignored ACK for low seq"); + return true; + } + + hicn_mapme_tfib_del (tfib, in_face); + + /* + * Is the ingress face in TFIB ? if so, remove it, otherwise it might be a + * duplicate + */ + retx_t *retx = vlib_process_signal_event_data (vm, + hicn_mapme_eventmgr_process_node. + index, + HICN_MAPME_EVENT_FACE_PH_DEL, + 1, + sizeof (retx_t)); + *retx = (retx_t) + { + .prefix = prefix, + .dpo = *dpo + }; + + return true; + +ERR_PARSE: + return false; +} + +vlib_node_registration_t hicn_mapme_ack_node; + +static uword +hicn_mapme_ack_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + hicn_buffer_t *hb; + hicn_mapme_ack_next_t next_index; + u32 n_left_from, *from, *to_next; + n_left_from = frame->n_vectors; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + while (n_left_from > 0) // buffers in the current frame + { + 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; + u32 next0 = HICN_MAPME_ACK_NEXT_ERROR_DROP; + u32 sw_if_index0; + /* 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); + + vlib_cli_output (vm, "Received IUAck"); + hb = hicn_get_buffer (b0); + hicn_mapme_process_ack (vm, b0, hb->face_id); + + /* Single loop: process 1 packet here */ + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + hicn_mapme_ack_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + } + /* $$$$$ Done processing 1 packet here $$$$$ */ + + /* 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, hicn_mapme_ack_node.index, +// HICN_MAPME_ACK_ERROR_SWAPPED, pkts_swapped); + return (frame->n_vectors); +} + +/* packet trace format function */ +static u8 * +hicn_mapme_ack_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_mapme_ack_trace_t *t = va_arg (*args, hicn_mapme_ack_trace_t *); + + s = format (s, "MAPME_ACK: pkt: %d, sw_if_index %d, next index %d", + (int) t->pkt_type, t->sw_if_index, t->next_index); + return (s); +} + + +/* + * Node registration for the MAP-Me node processing special interests + */ +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (hicn_mapme_ack_node) = +{ + .function = hicn_mapme_ack_node_fn, + .name = "hicn-mapme-ack", + .vector_size = sizeof (u32), + .runtime_data_bytes = sizeof (hicn_mapme_ack_runtime_t), + .format_trace = hicn_mapme_ack_format_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN (hicn_mapme_ack_error_strings), + .error_strings = hicn_mapme_ack_error_strings, + .n_next_nodes = HICN_MAPME_ACK_N_NEXT, + .next_nodes = + { + [HICN_MAPME_ACK_NEXT_ERROR_DROP] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |