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-rwxr-xr-xhicn-plugin/src/interest_pcslookup_node.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/hicn-plugin/src/interest_pcslookup_node.c b/hicn-plugin/src/interest_pcslookup_node.c
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+++ b/hicn-plugin/src/interest_pcslookup_node.c
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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 <vnet/ip/ip6_packet.h>
+
+#include "interest_pcslookup.h"
+#include "mgmt.h"
+#include "parser.h"
+#include "infra.h"
+#include "strategy_dpo_manager.h"
+#include "error.h"
+#include "state.h"
+
+/**
+ * @FILE This node performs a lookup in the PIT and CS for a received interest packet.
+ *
+ * This node passes the packet to the interest-hitpit and interest-hitcs nodes
+ * when there is a hit in the pit or content store, respectively.
+ */
+
+/* Functions declarations */
+
+/* packet trace format function */
+static u8 *hicn_interest_pcslookup_format_trace (u8 * s, va_list * args);
+
+
+/* Stats string values */
+static char *hicn_interest_pcslookup_error_strings[] = {
+#define _(sym, string) string,
+ foreach_hicnfwd_error
+#undef _
+};
+
+vlib_node_registration_t hicn_interest_pcslookup_node;
+
+/*
+ * ICN forwarder node for interests: handling of Interests delivered based on
+ * ACL. - 1 packet at a time - ipv4/tcp ipv6/tcp
+ */
+static uword
+hicn_interest_pcslookup_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, *to_next;
+ hicn_interest_pcslookup_next_t next_index;
+ hicn_interest_pcslookup_runtime_t *rt;
+ vl_api_hicn_api_node_stats_get_reply_t stats = { 0 };
+ int ret;
+
+ rt = vlib_node_get_runtime_data (vm, hicn_interest_pcslookup_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;
+
+ 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_PCSLOOKUP_NEXT_ERROR_DROP;
+ u64 name_hash = 0;
+ hicn_name_t name;
+ hicn_header_t *hicn0;
+ u32 node_id0 = 0;
+ u8 dpo_ctx_id0 = 0;
+ u8 vft_id0 = 0;
+ u8 is_cs0 = 0;
+ u8 hash_entry_id = 0;
+ u8 bucket_is_overflown = 0;
+ u32 bucket_id = ~0;
+
+ /* 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, STORE);
+ CLIB_PREFETCH (b1->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+ /* 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);
+ ret = hicn_interest_parse_pkt (b0, &name, &namelen, &hicn0, &isv6);
+
+ if (PREDICT_TRUE (ret == HICN_ERROR_NONE))
+ {
+ next0 =
+ isv6 ? HICN_INTEREST_PCSLOOKUP_NEXT_V6_LOOKUP :
+ HICN_INTEREST_PCSLOOKUP_NEXT_V4_LOOKUP;
+ }
+ nameptr = (u8 *) (&name);
+ stats.pkts_processed++;
+
+ if (PREDICT_FALSE (ret != HICN_ERROR_NONE ||
+ hicn_hashtb_fullhash (nameptr, namelen,
+ &name_hash) !=
+ HICN_ERROR_NONE))
+ {
+ next0 = HICN_INTEREST_PCSLOOKUP_NEXT_ERROR_DROP;
+ }
+ else
+ {
+ if (hicn_hashtb_lookup_node (rt->pitcs->pcs_table, nameptr,
+ namelen, name_hash,
+ 0 /* is_data */ , &node_id0,
+ &dpo_ctx_id0, &vft_id0, &is_cs0,
+ &hash_entry_id, &bucket_id,
+ &bucket_is_overflown) ==
+ HICN_ERROR_NONE)
+ {
+ next0 =
+ HICN_INTEREST_PCSLOOKUP_NEXT_INTEREST_HITPIT + is_cs0;
+ }
+ stats.pkts_interest_count++;
+ }
+
+ hicn_store_internal_state (b0, name_hash, node_id0, dpo_ctx_id0,
+ vft_id0, hash_entry_id, bucket_id,
+ bucket_is_overflown);
+
+ /* Maybe trace */
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ hicn_interest_pcslookup_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;
+ }
+ /*
+ * 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);
+ u32 pit_cs_count = hicn_pit_get_cs_count (rt->pitcs);
+ u32 pcs_ntw_count = hicn_pcs_get_ntw_count (rt->pitcs);
+
+
+ vlib_node_increment_counter (vm, hicn_interest_pcslookup_node.index,
+ HICNFWD_ERROR_PROCESSED, stats.pkts_processed);
+
+ vlib_node_increment_counter (vm, hicn_interest_pcslookup_node.index,
+ HICNFWD_ERROR_INTERESTS,
+ stats.pkts_interest_count);
+
+ update_node_counter (vm, hicn_interest_pcslookup_node.index,
+ HICNFWD_ERROR_INT_COUNT, pit_int_count);
+
+ update_node_counter (vm, hicn_interest_pcslookup_node.index,
+ HICNFWD_ERROR_CS_COUNT, pit_cs_count);
+
+ update_node_counter (vm, hicn_interest_pcslookup_node.index,
+ HICNFWD_ERROR_CS_NTW_COUNT, pcs_ntw_count);
+
+ return (frame->n_vectors);
+}
+
+/* packet trace format function */
+static u8 *
+hicn_interest_pcslookup_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_pcslookup_trace_t *t =
+ va_arg (*args, hicn_interest_pcslookup_trace_t *);
+
+ s = format (s, "INTEREST_PCSLOOKUP: 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 interest forwarder node
+ */
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE(hicn_interest_pcslookup_node) =
+{
+ .function = hicn_interest_pcslookup_node_fn,
+ .name = "hicn-interest-pcslookup",
+ .vector_size = sizeof(u32),
+ .runtime_data_bytes = sizeof(hicn_interest_pcslookup_runtime_t),
+ .format_trace = hicn_interest_pcslookup_format_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(hicn_interest_pcslookup_error_strings),
+ .error_strings = hicn_interest_pcslookup_error_strings,
+ .n_next_nodes = HICN_INTEREST_PCSLOOKUP_N_NEXT,
+ .next_nodes =
+ {
+ [HICN_INTEREST_PCSLOOKUP_NEXT_V4_LOOKUP] = "ip4-lookup",
+ [HICN_INTEREST_PCSLOOKUP_NEXT_V6_LOOKUP] = "ip6-lookup",
+ [HICN_INTEREST_PCSLOOKUP_NEXT_INTEREST_HITPIT] = "hicn-interest-hitpit",
+ [HICN_INTEREST_PCSLOOKUP_NEXT_INTEREST_HITCS] = "hicn-interest-hitcs",
+ [HICN_INTEREST_PCSLOOKUP_NEXT_ERROR_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables: eval: (c-set-style "gnu") End:
+ */