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authorMauro Sardara <msardara@cisco.com>2020-03-24 17:34:14 +0000
committerMauro Sardara <msardara@cisco.com>2020-09-14 17:31:15 +0000
commit88509fe353767cbde707c3e3b1f29392957819f3 (patch)
treecccd51bac7966cd3138c525e8075d90341184a66 /hicn-plugin/src/network/route.c
parentd875ae92a7fa1eaab3bc2616aeeedfc64a81fea4 (diff)
[HICN-574] Host stack plugin for VPP.
Signed-off-by: Mauro Sardara <msardara@cisco.com> Change-Id: I8d8fdffef31a7013265d6529c5f52f3d5ec70d18 Signed-off-by: Mauro Sardara <msardara@cisco.com> Signed-off-by: Mauro <you@example.com> Signed-off-by: Mauro Sardara <msardara@cisco.com>
Diffstat (limited to 'hicn-plugin/src/network/route.c')
-rw-r--r--hicn-plugin/src/network/route.c766
1 files changed, 766 insertions, 0 deletions
diff --git a/hicn-plugin/src/network/route.c b/hicn-plugin/src/network/route.c
new file mode 100644
index 000000000..3b774cd82
--- /dev/null
+++ b/hicn-plugin/src/network/route.c
@@ -0,0 +1,766 @@
+/*
+ * 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/fib/fib_entry.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/fib/fib_entry_track.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/dpo/dpo.h>
+#include <vnet/dpo/drop_dpo.h>
+#include <vnet/dpo/load_balance.h>
+#include <vnet/udp/udp.h>
+#include <vnet/udp/udp_encap.h>
+#include <vlib/global_funcs.h>
+
+#include "strategy_dpo_ctx.h"
+#include "strategy_dpo_manager.h"
+#include "strategy.h"
+#include "faces/face.h"
+#include "error.h"
+#include "strategies/dpo_mw.h"
+#include "infra.h"
+#include "udp_tunnels/udp_tunnel.h"
+
+#define FIB_SOURCE_HICN 0x04 //Right after the FIB_SOURCE_INTERFACE priority
+
+fib_source_t hicn_fib_src;
+
+fib_node_type_t hicn_fib_node_type;
+
+ip4_address_t localhost4 = {0};
+ip6_address_t localhost6 = {0};
+
+int
+hicn_route_get_dpo (const fib_prefix_t * prefix,
+ const dpo_id_t ** hicn_dpo, u32 * fib_index)
+{
+ //fib_prefix_t fib_pfx;
+ const dpo_id_t *load_balance_dpo_id;
+ const dpo_id_t *former_dpo_id;
+ int found = 0, ret = HICN_ERROR_ROUTE_NOT_FOUND;
+ fib_node_index_t fib_entry_index;
+
+ /* Check if the route already exist in the fib */
+ /*
+ * ASSUMPTION: we use table 0 which is the default table and it is
+ * already existing and locked
+ */
+ *fib_index = fib_table_find_or_create_and_lock (prefix->fp_proto,
+ HICN_FIB_TABLE,
+ hicn_fib_src);
+ fib_entry_index = fib_table_lookup_exact_match (*fib_index, prefix);
+
+ if (fib_entry_index != FIB_NODE_INDEX_INVALID)
+ {
+ /* Route already existing. We need to update the dpo. */
+ load_balance_dpo_id =
+ fib_entry_contribute_ip_forwarding (fib_entry_index);
+
+ /* The dpo is not a load balance dpo as expected */
+ if (load_balance_dpo_id->dpoi_type != DPO_LOAD_BALANCE)
+ ret = HICN_ERROR_ROUTE_NO_LD;
+ else
+ {
+ /* former_dpo_id is a load_balance dpo */
+ load_balance_t *lb =
+ load_balance_get (load_balance_dpo_id->dpoi_index);
+
+ /* FIB entry exists but there is no hicn dpo. */
+ ret = HICN_ERROR_ROUTE_DPO_NO_HICN;
+ for (int i = 0; i < lb->lb_n_buckets && !found; i++)
+ {
+ former_dpo_id = load_balance_get_bucket_i (lb, i);
+
+ if (dpo_is_hicn (former_dpo_id))
+ {
+ *hicn_dpo = former_dpo_id;
+ ret = HICN_ERROR_NONE;
+ found = 1;
+ }
+ }
+ }
+ }
+ /*
+ * Remove the lock from the table. We keep one lock per route, not
+ * per dpo
+ */
+ fib_table_unlock (*fib_index, prefix->fp_proto, hicn_fib_src);
+
+ return ret;
+}
+
+int
+hicn_route_set_strategy (fib_prefix_t * prefix, u8 strategy_id)
+{
+ const dpo_id_t *hicn_dpo_id;
+ dpo_id_t new_dpo_id = DPO_INVALID;
+ int ret;
+ hicn_dpo_ctx_t *old_hicn_dpo_ctx;
+ const hicn_dpo_vft_t *new_dpo_vft;
+ index_t new_hicn_dpo_idx;
+ u32 fib_index;
+
+ ret = hicn_route_get_dpo (prefix, &hicn_dpo_id, &fib_index);
+
+ if (ret == HICN_ERROR_NONE)
+ {
+ old_hicn_dpo_ctx = hicn_strategy_dpo_ctx_get (hicn_dpo_id->dpoi_index);
+
+ new_dpo_vft = hicn_dpo_get_vft_from_id (strategy_id);
+
+ if (new_dpo_vft == NULL || old_hicn_dpo_ctx == NULL)
+ return HICN_ERROR_STRATEGY_NOT_FOUND;
+
+ /* Create a new dpo for the new strategy */
+ new_dpo_vft->hicn_dpo_create (hicn_dpo_id->dpoi_proto,
+ old_hicn_dpo_ctx->next_hops,
+ old_hicn_dpo_ctx->entry_count,
+ &new_hicn_dpo_idx);
+
+ /* the value we got when we registered */
+ dpo_set (&new_dpo_id,
+ new_dpo_vft->hicn_dpo_get_type (),
+ (ip46_address_is_ip4 (&prefix->fp_addr) ? DPO_PROTO_IP4 :
+ DPO_PROTO_IP6), new_hicn_dpo_idx);
+
+ /* Here is where we create the "via" like route */
+ /*
+ * For the moment we use the global one the prefix you want
+ * to match Neale suggested -- FIB_SOURCE_HICN the client
+ * that is adding them -- no easy explanation at this time…
+ */
+ fib_node_index_t new_fib_node_index =
+ fib_table_entry_special_dpo_update (fib_index,
+ prefix,
+ hicn_fib_src,
+ FIB_ENTRY_FLAG_EXCLUSIVE,
+ &new_dpo_id);
+
+ dpo_unlock (&new_dpo_id);
+ ret =
+ (new_fib_node_index !=
+ FIB_NODE_INDEX_INVALID) ? HICN_ERROR_NONE :
+ HICN_ERROR_ROUTE_NOT_UPDATED;
+ }
+ //Remember to remove the lock from the table when removing the entry
+ return ret;
+
+}
+
+int
+ip_nh_add_helper (fib_protocol_t fib_proto, const fib_prefix_t * rpfx, ip46_address_t * nh, u32 sw_if)
+{
+ fib_route_path_t *rpaths = NULL, rpath;
+
+ u32 fib_index = fib_table_find(fib_proto, 0);
+
+ clib_memset(&rpath, 0, sizeof(rpath));
+ rpath.frp_weight = 1;
+ rpath.frp_sw_if_index = sw_if;
+ rpath.frp_addr = *nh;
+ rpath.frp_proto = ip46_address_is_ip4(nh) ? DPO_PROTO_IP4 : DPO_PROTO_IP6;
+
+ vec_add1(rpaths, rpath);
+
+ fib_table_entry_path_add2 (fib_index,
+ rpfx,
+ FIB_SOURCE_CLI,
+ FIB_ENTRY_FLAG_NONE, rpaths);
+ return 0;
+}
+
+int
+ip_nh_del_helper (fib_protocol_t fib_proto, const fib_prefix_t * rpfx, ip46_address_t * nh, u32 sw_if)
+{
+ fib_route_path_t *rpaths = NULL, rpath;
+
+ u32 fib_index = fib_table_find(fib_proto, 0);
+
+ clib_memset(&rpath, 0, sizeof(rpath));
+ rpath.frp_weight = 1;
+ rpath.frp_sw_if_index = sw_if;
+ rpath.frp_addr = *nh;
+ rpath.frp_proto = ip46_address_is_ip4(nh) ? DPO_PROTO_IP4 : DPO_PROTO_IP6;
+
+ vec_add1(rpaths, rpath);
+
+ fib_table_entry_path_remove2 (fib_index,
+ rpfx,
+ FIB_SOURCE_CLI,
+ rpaths);
+ return 0;
+}
+
+
+static ip46_address_t * get_address(ip46_address_t * nh, u32 sw_if, fib_protocol_t proto)
+{
+ ip46_address_t * local_address = calloc(1, sizeof(ip46_address_t));
+
+ if (proto == FIB_PROTOCOL_IP4)
+ {
+ ip_interface_address_t *interface_address;
+ ip4_address_t *addr =
+ ip4_interface_address_matching_destination (&ip4_main,
+ &nh->ip4,
+ sw_if,
+ &interface_address);
+
+ if (addr == NULL)
+ addr = ip4_interface_first_address (&ip4_main,
+ sw_if,
+ &interface_address);
+ if (addr != NULL)
+ ip46_address_set_ip4 (local_address, addr);
+ }
+ else if (proto == FIB_PROTOCOL_IP6)
+ {
+ ip_interface_address_t *interface_address;
+ ip6_interface_address_matching_destination (&ip6_main,
+ &nh->ip6,
+ sw_if,
+ &interface_address);
+
+ ip6_address_t *addr = NULL;
+ if (interface_address != NULL)
+ addr =
+ (ip6_address_t *)
+ ip_interface_address_get_address (&ip6_main.lookup_main,
+ interface_address);
+
+ if (addr == NULL)
+ addr = ip6_interface_first_address (&ip6_main, sw_if);
+
+ if (addr != NULL)
+ ip46_address_set_ip6 (local_address, addr);
+ }
+
+ return local_address;
+}
+
+static void
+sync_hicn_fib_entry(hicn_dpo_ctx_t *fib_entry)
+{
+ const dpo_id_t * dpo_loadbalance = fib_entry_contribute_ip_forwarding (fib_entry->fib_entry_index);
+ const load_balance_t *lb0 = load_balance_get(dpo_loadbalance->dpoi_index);
+ index_t hicn_fib_entry_index = hicn_strategy_dpo_ctx_get_index(fib_entry);
+ hicn_face_id_t * vec_faces = 0;
+
+ dpo_id_t temp = DPO_INVALID;
+ const dpo_id_t *former_dpo = &temp;
+ int index = 0;
+ for (int j = 0; j < lb0->lb_n_buckets; j++) {
+ const dpo_id_t * dpo = load_balance_get_bucket_i(lb0,j);
+
+ int dpo_comparison = dpo_cmp(former_dpo, dpo);
+ former_dpo = dpo;
+ /*
+ * Loadbalancing in ip replicate the dpo in multiple buckets
+ * in order to honor the assigned weights.
+ */
+ if (dpo_comparison == 0)
+ continue;
+
+ u32 sw_if = ~0;
+ ip46_address_t * nh = NULL;
+ hicn_face_id_t face_id = HICN_FACE_NULL;
+
+ if (dpo_is_adj(dpo))
+ {
+ ip_adjacency_t * adj = adj_get (dpo->dpoi_index);
+ sw_if = adj->rewrite_header.sw_if_index;
+ nh = get_address (&(adj->sub_type.nbr.next_hop), sw_if, fib_entry->proto);
+ }
+ else if (dpo->dpoi_type == dpo_type_udp_ip4 || dpo->dpoi_type == dpo_type_udp_ip6)
+ {
+ u8 proto = dpo->dpoi_type == dpo_type_udp_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
+ nh = calloc (1, sizeof(ip46_address_t));
+ switch (dpo->dpoi_proto)
+ {
+ case FIB_PROTOCOL_IP6:
+ nh = calloc (1, sizeof(ip46_address_t));
+ ip46_address_set_ip6(nh, &localhost6);
+ break;
+ case FIB_PROTOCOL_IP4:
+ nh = calloc (1, sizeof(ip46_address_t));
+ ip46_address_set_ip4(nh, &localhost4);
+ break;
+ default:
+ nh = calloc (1, sizeof(ip46_address_t));
+ }
+ udp_tunnel_add_existing (dpo->dpoi_index, proto);
+ }
+ else //if (dpo_is_drop(dpo))
+ {
+ sw_if = dpo_get_urpf(dpo);
+ nh = calloc (1, sizeof(ip46_address_t));
+ }
+
+ /* Careful, this adds a lock on the face if it exists */
+ hicn_face_add(dpo, nh, sw_if, &face_id, 0);
+
+ vec_validate(vec_faces, index);
+ vec_faces[index] = face_id;
+ index++;
+
+ /* Face creation can realloc load_balance_t? Seem the fib_tracking does so. */
+ dpo_loadbalance = fib_entry_contribute_ip_forwarding (fib_entry->fib_entry_index);
+ lb0 = load_balance_get(dpo_loadbalance->dpoi_index);
+ }
+
+ const hicn_dpo_vft_t * strategy_vft = hicn_dpo_get_vft(fib_entry->dpo_type);
+ int i = 0;
+ while (i < fib_entry->entry_count)
+ {
+ u32 idx_nh = vec_search(vec_faces, fib_entry->next_hops[i]);
+ if (idx_nh == ~0)
+ {
+ strategy_vft->hicn_dpo_del_nh(fib_entry->next_hops[i], hicn_fib_entry_index);
+ }
+ else
+ {
+ vec_del1(vec_faces, idx_nh);
+
+ /* Remove the lock added by hicn_face_add */
+ hicn_face_unlock_with_id (fib_entry->next_hops[i]);
+ i++;
+ }
+ }
+
+ hicn_face_id_t *face_id;
+ vec_foreach(face_id, vec_faces)
+ {
+ strategy_vft->hicn_dpo_add_update_nh(*face_id, hicn_fib_entry_index);
+
+ /* Remove the lock added by hicn_face_add */
+ hicn_face_unlock_with_id (*face_id);
+
+ }
+ vec_free(vec_faces);
+}
+
+static void
+enable_disable_data_receiving (fib_protocol_t proto, u32 sw_if, u8 is_enable)
+{
+ if (proto == FIB_PROTOCOL_IP4 && sw_if != ~0)
+ vnet_feature_enable_disable ("ip4-local", "hicn-data-input-ip4",
+ sw_if, is_enable, 0, 0);
+ else if (proto == FIB_PROTOCOL_IP6 && sw_if != ~0)
+ vnet_feature_enable_disable ("ip6-local", "hicn-data-input-ip6",
+ sw_if, is_enable, 0, 0);
+
+}
+
+walk_rc_t enable_data_receiving_new_fib_entry (vnet_main_t * vnm,
+ vnet_sw_interface_t * si,
+ void *ctx)
+{
+ fib_protocol_t *proto = (fib_protocol_t *) ctx;
+ enable_disable_data_receiving(*proto, si->sw_if_index, 1);
+
+ return (WALK_CONTINUE);
+}
+
+walk_rc_t disable_data_receiving_rm_fib_entry (vnet_main_t * vnm,
+ vnet_sw_interface_t * si,
+ void *ctx)
+{
+ fib_protocol_t *proto = (fib_protocol_t *) ctx;
+ enable_disable_data_receiving(*proto, si->sw_if_index, 0);
+
+ return (WALK_CONTINUE);
+ }
+
+int
+hicn_route_enable (fib_prefix_t *prefix) {
+
+ int ret = HICN_ERROR_NONE;
+ fib_node_index_t fib_entry_index;
+
+ /* Check if the route already exist in the fib */
+ /*
+ * ASSUMPTION: we use table 0 which is the default table and it is
+ * already existing and locked
+ */
+ u32 fib_index = fib_table_find(prefix->fp_proto, 0);
+
+ fib_entry_index = fib_table_lookup_exact_match (fib_index, prefix);
+
+ if (fib_entry_index == FIB_NODE_INDEX_INVALID)
+ {
+ fib_entry_index = fib_table_lookup (fib_index, prefix);
+
+ fib_route_path_t * paths = fib_entry_encode(fib_entry_index);
+
+ fib_table_entry_path_add2(fib_index, prefix, FIB_SOURCE_CLI, FIB_ENTRY_FLAG_NONE, paths);
+ }
+
+ /* Check if the prefix is already enabled */
+ u32 fib_hicn_index = fib_table_find(prefix->fp_proto, HICN_FIB_TABLE);
+
+ fib_node_index_t fib_hicn_entry_index = fib_table_lookup_exact_match (fib_hicn_index, prefix);
+
+ if (fib_hicn_entry_index == FIB_NODE_INDEX_INVALID)
+ {
+ dpo_id_t dpo = DPO_INVALID;
+ index_t dpo_idx;
+ default_dpo.hicn_dpo_create (prefix->fp_proto, 0, NEXT_HOP_INVALID,
+ &dpo_idx);
+
+ /* the value we got when we registered */
+ /*
+ * This should be taken from the name?!? the index of the
+ * object
+ */
+ dpo_set (&dpo,
+ default_dpo.hicn_dpo_get_type (),
+ (ip46_address_is_ip4 (&prefix->fp_addr) ? DPO_PROTO_IP4 :
+ DPO_PROTO_IP6), dpo_idx);
+
+ hicn_dpo_ctx_t * fib_entry = hicn_strategy_dpo_ctx_get(dpo_idx);
+
+ fib_node_init (&fib_entry->fib_node, hicn_fib_node_type);
+ fib_node_lock (&fib_entry->fib_node);
+
+ fib_entry->fib_entry_index = fib_entry_track (fib_index,
+ prefix,
+ hicn_fib_node_type,
+ dpo_idx, &fib_entry->fib_sibling);
+
+
+ /* Here is where we create the "via" like route */
+ /*
+ * For the moment we use the global one the prefix you want
+ * to match Neale suggested -- FIB_SOURCE_HICN the client
+ * that is adding them -- no easy explanation at this time…
+ */
+ CLIB_UNUSED (fib_node_index_t new_fib_node_index) =
+ fib_table_entry_special_dpo_add (fib_hicn_index,
+ prefix,
+ hicn_fib_src,
+ (FIB_ENTRY_FLAG_EXCLUSIVE |
+ FIB_ENTRY_FLAG_LOOSE_URPF_EXEMPT),
+ &dpo);
+
+ sync_hicn_fib_entry(fib_entry);
+
+ /* We added a route, therefore add one lock to the table */
+ fib_table_lock (fib_index, prefix->fp_proto, hicn_fib_src);
+
+ /* Enable the feature to punt data packet every time we enable a new hicn route
+ * For each enable there must be a disable to defenitely disable the feature
+ *
+ * We cannot enable only the interfaces on which we send out interest because
+ * Data packet might be coming on in different interfaces, as in che case of mpls
+ * tunnels (packets are received from the physical nic, not the mpls tunnel interface).
+ */
+ vnet_main_t * vnm = vnet_get_main ();
+ vnet_sw_interface_walk(vnm, enable_data_receiving_new_fib_entry, &(prefix->fp_proto));
+
+ dpo_unlock (&dpo);
+ }
+ else
+ {
+ const dpo_id_t *load_balance_dpo_id;
+ const dpo_id_t *strategy_dpo_id;
+
+ /* Route already existing. We need to update the dpo. */
+ load_balance_dpo_id =
+ fib_entry_contribute_ip_forwarding (fib_hicn_entry_index);
+
+ /* The dpo is not a load balance dpo as expected */
+ if (load_balance_dpo_id->dpoi_type != DPO_LOAD_BALANCE)
+ {
+ ret = HICN_ERROR_ROUTE_NO_LD;
+ goto done;
+ }
+ else
+ {
+ load_balance_t *lb =
+ load_balance_get (load_balance_dpo_id->dpoi_index);
+
+ strategy_dpo_id = load_balance_get_bucket_i (lb, 0);
+
+ if (!dpo_is_hicn (strategy_dpo_id))
+ {
+ ret = HICN_ERROR_ROUTE_DPO_NO_HICN;
+ goto done;
+ }
+
+ if (lb->lb_n_buckets > 1)
+ {
+ ret = HICN_ERROR_ROUTE_MLT_LD;
+ goto done;
+ }
+
+ hicn_dpo_ctx_t * hicn_fib_entry = hicn_strategy_dpo_ctx_get(strategy_dpo_id->dpoi_index);
+
+ sync_hicn_fib_entry(hicn_fib_entry);
+ }
+ }
+
+ done:
+ return ret;
+}
+
+int
+hicn_route_disable (fib_prefix_t *prefix) {
+
+ int ret = HICN_ERROR_NONE;
+
+ /* Check if the prefix is already enabled */
+ u32 fib_hicn_index = fib_table_find(prefix->fp_proto, HICN_FIB_TABLE);
+
+ fib_node_index_t fib_hicn_entry_index = fib_table_lookup_exact_match (fib_hicn_index, prefix);
+
+ if (fib_hicn_entry_index == FIB_NODE_INDEX_INVALID)
+ {
+ return HICN_ERROR_ROUTE_NOT_FOUND;
+ }
+ else
+ {
+ const dpo_id_t *load_balance_dpo_id;
+ const dpo_id_t *strategy_dpo_id;
+ hicn_dpo_ctx_t * hicn_fib_entry;
+
+ /* Route already existing. We need to update the dpo. */
+ load_balance_dpo_id =
+ fib_entry_contribute_ip_forwarding (fib_hicn_entry_index);
+
+ /* The dpo is not a load balance dpo as expected */
+ if (load_balance_dpo_id->dpoi_type != DPO_LOAD_BALANCE)
+ {
+ ret = HICN_ERROR_ROUTE_NO_LD;
+ goto done;
+ }
+ else
+ {
+ load_balance_t *lb =
+ load_balance_get (load_balance_dpo_id->dpoi_index);
+
+ strategy_dpo_id = load_balance_get_bucket_i (lb, 0);
+
+ if (!dpo_is_hicn (strategy_dpo_id))
+ {
+ ret = HICN_ERROR_ROUTE_DPO_NO_HICN;
+ goto done;
+ }
+
+ if (lb->lb_n_buckets > 1)
+ {
+ ret = HICN_ERROR_ROUTE_MLT_LD;
+ goto done;
+ }
+
+ hicn_fib_entry = hicn_strategy_dpo_ctx_get(strategy_dpo_id->dpoi_index);
+
+ for (int i = 0; i < hicn_fib_entry->entry_count; i++)
+ {
+ hicn_strategy_dpo_ctx_del_nh(hicn_fib_entry->next_hops[i], hicn_fib_entry);
+ }
+ }
+
+ fib_entry_untrack(hicn_fib_entry->fib_entry_index, hicn_fib_entry->fib_sibling);
+
+ fib_table_entry_special_remove (fib_hicn_index, prefix, hicn_fib_src);
+
+ /* Disable the feature to punt data packet every time we enable a new hicn route */
+ vnet_main_t * vnm = vnet_get_main ();
+ vnet_sw_interface_walk(vnm, disable_data_receiving_rm_fib_entry, &(prefix->fp_proto));
+ }
+
+ done:
+ return ret;
+}
+
+
+static fib_node_t *
+hicn_ctx_node_get (fib_node_index_t index)
+{
+ hicn_dpo_ctx_t * hicn_ctx;
+
+ hicn_ctx = hicn_strategy_dpo_ctx_get(index);
+
+ return (&hicn_ctx->fib_node);
+}
+
+static void
+hicn_fib_last_lock_gone (fib_node_t *node)
+{
+}
+
+static hicn_dpo_ctx_t *
+hicn_ctx_from_fib_node (fib_node_t * node)
+{
+ return ((hicn_dpo_ctx_t *) (((char *) node) -
+ STRUCT_OFFSET_OF (hicn_dpo_ctx_t, fib_node)));
+}
+
+static fib_node_back_walk_rc_t
+hicn_fib_back_walk_notify (fib_node_t *node,
+ fib_node_back_walk_ctx_t *ctx)
+{
+
+ hicn_dpo_ctx_t *fib_entry = hicn_ctx_from_fib_node (node);
+
+ sync_hicn_fib_entry(fib_entry);
+
+ return (FIB_NODE_BACK_WALK_CONTINUE);
+}
+
+static void
+hicn_fib_show_memory (void)
+{
+}
+
+
+static const fib_node_vft_t hicn_fib_vft =
+{
+ .fnv_get = hicn_ctx_node_get,
+ .fnv_last_lock = hicn_fib_last_lock_gone,
+ .fnv_back_walk = hicn_fib_back_walk_notify,
+ .fnv_mem_show = hicn_fib_show_memory,
+};
+
+fib_table_walk_rc_t enable_data_on_existing_hicn(fib_node_index_t fei,
+ void *ctx)
+{
+ u32 sw_if = *(u32 *)ctx;
+ const dpo_id_t *load_balance_dpo_id;
+ const dpo_id_t *strategy_dpo_id;
+
+ /* Route already existing. We need to update the dpo. */
+ load_balance_dpo_id =
+ fib_entry_contribute_ip_forwarding (fei);
+
+ /* The dpo is not a load balance dpo as expected */
+ if (load_balance_dpo_id->dpoi_type != DPO_LOAD_BALANCE)
+ {
+ goto done;
+ }
+ else
+ {
+ load_balance_t *lb =
+ load_balance_get (load_balance_dpo_id->dpoi_index);
+
+ strategy_dpo_id = load_balance_get_bucket_i (lb, 0);
+
+ if (!dpo_is_hicn (strategy_dpo_id))
+ {
+ goto done;
+ }
+
+ enable_disable_data_receiving (strategy_dpo_id->dpoi_proto, sw_if, 1);
+ }
+
+ done:
+ return (FIB_TABLE_WALK_CONTINUE);
+}
+
+static clib_error_t *
+set_table_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
+{
+
+ if (!is_add)
+ return HICN_ERROR_NONE;
+
+ vnet_sw_interface_t * sw_int = vnet_get_sw_interface(vnm, sw_if_index);
+ vnet_hw_interface_t * hw_int = vnet_get_hw_interface(vnm, sw_int->hw_if_index);
+
+ char * mpls = "mpls";
+ if (strstr((char *)hw_int->name, mpls) == NULL)
+ return 0;
+
+ int rv = ip_table_bind (FIB_PROTOCOL_IP4, sw_if_index, HICN_FIB_TABLE, 1);
+
+ if (!rv)
+ {
+ rv = ip_table_bind (FIB_PROTOCOL_IP6, sw_if_index, HICN_FIB_TABLE, 1);
+
+ if (rv)
+ {
+ /* An error occurred. Bind the interface back to the default fib */
+ ip_table_bind (FIB_PROTOCOL_IP4, sw_if_index, 0, 1);
+ }
+ }
+
+ u32 fib_index = fib_table_find(FIB_PROTOCOL_IP4,
+ HICN_FIB_TABLE);
+ if (fib_index != ~0)
+ {
+ /*
+ * Walk the ip4 and ip6 fib tables to discover existing hicn fib entries.
+ * For each of them we need to enable the feature to punt data packets.
+ */
+ fib_table_walk(fib_index,
+ FIB_PROTOCOL_IP4,
+ enable_data_on_existing_hicn,
+ &sw_if_index);
+ }
+
+ fib_index = fib_table_find(FIB_PROTOCOL_IP6,
+ HICN_FIB_TABLE);
+ if (fib_index != ~0)
+ {
+ fib_table_walk(fib_index,
+ FIB_PROTOCOL_IP6,
+ enable_data_on_existing_hicn,
+ &sw_if_index);
+ }
+
+ return rv ? clib_error_return (0, "unable to add hicn table to interface") : 0;
+}
+
+VNET_SW_INTERFACE_ADD_DEL_FUNCTION (set_table_interface_add_del);
+
+void
+hicn_route_init ()
+{
+ vnet_main_t * vnm = vnet_get_main ();
+ vlib_main_t * vm = vlib_get_main ();
+ hicn_fib_src = fib_source_allocate ("hicn",
+ FIB_SOURCE_HICN, FIB_SOURCE_BH_API);
+
+ hicn_fib_node_type = fib_node_register_new_type(&hicn_fib_vft);
+
+ ip_table_create(FIB_PROTOCOL_IP4, HICN_FIB_TABLE, 1, (const u8 *)"hicn4");
+ ip_table_create(FIB_PROTOCOL_IP6, HICN_FIB_TABLE, 1, (const u8 *)"hicn6");
+
+ u32 sw_if_index;
+ u8 mac_address[6];
+ u8 is_specified = 0;
+ u32 user_instance = 0;
+
+ vnet_create_loopback_interface (&sw_if_index, mac_address,
+ is_specified, user_instance);
+
+ localhost4.as_u8[0] = 127;
+ localhost4.as_u8[3] = 1;
+ u32 length4 = 32, length6 = 128, is_del = 0, flags = 0;
+
+ localhost6.as_u8[15] = 1;
+
+ ip4_add_del_interface_address (vm, sw_if_index, &localhost4, length4, is_del);
+ ip6_add_del_interface_address (vm, sw_if_index, &localhost6, length6, is_del);
+
+ flags |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
+ vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables: eval: (c-set-style "gnu") End:
+ */