vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2020-12-01	tests: remove ip_punt from vpp_papi_provider and add ip_punt object models	Jakub Grajciar	1	-29/+24
2020-11-26	fib: Only track cover if activated	Neale Ranns	1	-5/+9
2020-10-21	ip: convert u32 entry_flags to vl_api_mfib_entry_flags_t on mroute API	Neale Ranns	1	-9/+14
2020-05-14	ip: fix interface ip address del sw_if_index check	yedg	1	-0/+18
2020-05-05	api: ip: add IP_ROUTE_LOOKUP API	Christian Hopps	1	-0/+74
2020-04-23	ip: Replace Sematics for Interface IP addresses	Neale Ranns	1	-0/+162
2020-03-17	fib: Always install all routers mcast addresses	Neale Ranns	1	-1/+1
2020-03-12	policer: API cleanup	Jakub Grajciar	1	-4/+4
2019-12-17	ip: Protocol Independent IP Neighbors	Neale Ranns	1	-1/+1
2019-11-26	fib: Fix crash on cover update to non activated adj source	Neale Ranns	1	-0/+64
2019-11-26	fib: Table Replace	Neale Ranns	1	-1/+131
2019-11-15	tests: Remove the unrequired VPP IP address/prefix class wrappers	Neale Ranns	1	-18/+20
2019-11-05	misc: Fix python scripts shebang line	Renato Botelho do Couto	1	-1/+1
2019-11-05	ip: Fragmentation fixes	Neale Ranns	1	-0/+11
2019-10-21	ip: test support python3	Ole Troan	1	-33/+33
2019-10-16	tests: cli wrapper should return string	Ole Troan	1	-3/+3
2019-08-20	api: Cleanup APIs interface.api	Jakub Grajciar	1	-8/+11
2019-08-12	ip: allow addrs from the same prefix on intf	Matthew Smith	1	-6/+59
2019-07-19	ip: admin change affects intf IPv4 addr routes	Matthew G Smith	1	-0/+74
2019-06-18	fib: fib api updates	Neale Ranns	1	-132/+69
2019-06-04	punt: fix the set_punt API/CLI which was rejecting valid ports	Neale Ranns	1	-1/+20
2019-05-16	tests: refactor. Replace literal constant w/ named constant.	Paul Vinciguerra	1	-19/+21
2019-04-11	Tests: Refactor tearDown show command logging, add lifecycle markers.	Paul Vinciguerra	1	-3/+4
2019-04-10	Tests Cleanup: Fix missing calls to setUpClass/tearDownClass.	Paul Vinciguerra	1	-0/+104
2019-03-28	Typos. A bunch of typos I've been collecting.	Paul Vinciguerra	1	-4/+4
2019-03-15	Revert "API: Cleanup APIs interface.api"	Ole Trøan	1	-11/+8
2019-03-15	API: Cleanup APIs interface.api	Jakub Grajciar	1	-8/+11
2019-03-14	TEST: link-state up/down notifications on FIB forwarding	Neale Ranns	1	-1/+82
2019-03-11	vpp_papi_provider: Remove more wrapper functions.	Ole Troan	1	-8/+12
2019-03-11	VPP-1508: Tests: Fix vpp_api struct.error under py3.	Paul Vinciguerra	1	-2/+2
2019-03-11	VPP-1508: Use scapy.compat to manage packet level library differences.	Paul Vinciguerra	1	-2/+3
2019-03-07	Tests: Refactor payload_to_info()	Paul Vinciguerra	1	-3/+3
2019-03-07	VPP-1508: Python3 tests. Explicitly specify string formatting.	Paul Vinciguerra	1	-2/+2
2019-03-06	test framework: vpp_papi_provider.py - further cleanup	Ole Troan	1	-14/+12
2018-12-17	Fix TestIPv4FibCrud interdependencies.	Paul Vinciguerra	1	-0/+14
2018-12-12	PAPI: Allow ipaddress object as argument and return values from API calls	Ole Troan	1	-6/+6
2018-12-10	IP-local: any IP can appear as the source (VPP-1522)	Neale Ranns	1	-0/+19
2018-12-06	API: Change ip4_address and ip6_address to use type alias.	Ole Troan	1	-1/+1
2018-12-05	VPP-1508 python3 tests: xrange	Paul Vinciguerra	1	-11/+13
2018-11-29	VPP-1507: Added binary api to dump configured ip_punt_redirect	Pavel Kotucek	1	-4/+37
2018-11-27	VPP-1508 python3 tests: .encode('hex')	Paul Vinciguerra	1	-6/+5
2018-11-26	Python3 tests: Fix asserts.	Paul Vinciguerra	1	-2/+2
2018-10-22	Fix buffer overflow when fragmenting packets (VPP-1383)	Juraj Sloboda	1	-0/+50
2018-10-15	VPP-1448: Fix error when recurse on down the trie.	mu.duojiao	1	-0/+49
2018-09-07	IP route update fix when multipath and drop set	Neale Ranns	1	-1/+27
2018-08-03	loop counter to prevent infiinte number of look ups per-packet	Neale Ranns	1	-0/+18
2018-07-20	IP directed broadcast	Neale Ranns	1	-0/+69
2018-07-02	make_test: add icmp packet size sweep and icmp echo tests	Jan Gelety	1	-24/+100
2018-06-11	MTU: Software interface / Per-protocol MTU support	Ole Troan	1	-2/+4
2018-05-23	VPP-1283: IPv4 PMTU missing MTU value in ICMP4 message.	Ole Troan	1	-1/+1

/* * Copyright (c) 2016 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/ip/format.h> #include <vnet/ip/lookup.h> #include <vnet/adj/adj.h> #include <vnet/dpo/load_balance.h> #include <vnet/dpo/drop_dpo.h> #include <vnet/fib/fib_entry.h> #include <vnet/fib/fib_walk.h> #include <vnet/fib/fib_entry_src.h> #include <vnet/fib/fib_entry_cover.h> #include <vnet/fib/fib_table.h> #include <vnet/fib/fib_internal.h> #include <vnet/fib/fib_attached_export.h> #include <vnet/fib/fib_path_ext.h> /* * Array of strings/names for the FIB sources */ static const char *fib_source_names[] = FIB_SOURCES; static const char *fib_attribute_names[] = FIB_ENTRY_ATTRIBUTES; static const char *fib_src_attribute_names[] = FIB_ENTRY_SRC_ATTRIBUTES; /* * Pool for all fib_entries */ static fib_entry_t *fib_entry_pool; /** * the logger */ vlib_log_class_t fib_entry_logger; fib_entry_t * fib_entry_get (fib_node_index_t index) { return (pool_elt_at_index(fib_entry_pool, index)); } static fib_node_t * fib_entry_get_node (fib_node_index_t index) { return ((fib_node_t*)fib_entry_get(index)); } fib_node_index_t fib_entry_get_index (const fib_entry_t * fib_entry) { return (fib_entry - fib_entry_pool); } fib_protocol_t fib_entry_get_proto (const fib_entry_t * fib_entry) { return (fib_entry->fe_prefix.fp_proto); } dpo_proto_t fib_entry_get_dpo_proto (const fib_entry_t * fib_entry) { return (fib_proto_to_dpo(fib_entry->fe_prefix.fp_proto)); } fib_forward_chain_type_t fib_entry_get_default_chain_type (const fib_entry_t *fib_entry) { switch (fib_entry->fe_prefix.fp_proto) { case FIB_PROTOCOL_IP4: return (FIB_FORW_CHAIN_TYPE_UNICAST_IP4); case FIB_PROTOCOL_IP6: return (FIB_FORW_CHAIN_TYPE_UNICAST_IP6); case FIB_PROTOCOL_MPLS: if (MPLS_EOS == fib_entry->fe_prefix.fp_eos) return (FIB_FORW_CHAIN_TYPE_MPLS_EOS); else return (FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS); } return (FIB_FORW_CHAIN_TYPE_UNICAST_IP4); } u8 * format_fib_source (u8 * s, va_list * args) { fib_source_t source = va_arg (*args, int); s = format (s, "src:%s", fib_source_names[source]); return (s); } u8 * format_fib_entry_flags (u8 *s, va_list *args) { fib_entry_attribute_t attr; fib_entry_flag_t flag = va_arg(*args, int); FOR_EACH_FIB_ATTRIBUTE(attr) { if ((1<<attr) & flag) { s = format (s, "%s,", fib_attribute_names[attr]); } } return (s); } u8 * format_fib_entry_src_flags (u8 *s, va_list *args) { fib_entry_src_attribute_t sattr; fib_entry_src_flag_t flag = va_arg(*args, int); FOR_EACH_FIB_SRC_ATTRIBUTE(sattr) { if ((1<<sattr) & flag) { s = format (s, "%s,", fib_src_attribute_names[sattr]); } } return (s); } u8 * format_fib_entry (u8 * s, va_list * args) { fib_forward_chain_type_t fct; fib_entry_t *fib_entry; fib_entry_src_t *src; fib_node_index_t fei; fib_source_t source; int level; fei = va_arg (*args, fib_node_index_t); level = va_arg (*args, int); fib_entry = fib_entry_get(fei); s = format (s, "%U", format_fib_prefix, &fib_entry->fe_prefix); if (level >= FIB_ENTRY_FORMAT_DETAIL) { s = format (s, " fib:%d", fib_entry->fe_fib_index); s = format (s, " index:%d", fib_entry_get_index(fib_entry)); s = format (s, " locks:%d", fib_entry->fe_node.fn_locks); FOR_EACH_SRC_ADDED(fib_entry, src, source, ({ s = format (s, "\n %U", format_fib_source, source); s = format (s, " refs:%d", src->fes_ref_count); if (FIB_ENTRY_FLAG_NONE != src->fes_entry_flags) { s = format(s, " entry-flags:%U", format_fib_entry_flags, src->fes_entry_flags); } if (FIB_ENTRY_SRC_FLAG_NONE != src->fes_flags) { s = format(s, " src-flags:%U", format_fib_entry_src_flags, src->fes_flags); } s = fib_entry_src_format(fib_entry, source, s); s = format (s, "\n"); if (FIB_NODE_INDEX_INVALID != src->fes_pl) { s = fib_path_list_format(src->fes_pl, s); } s = format(s, "%U", format_fib_path_ext_list, &src->fes_path_exts); })); s = format (s, "\n forwarding: "); } else { s = format (s, "\n"); } fct = fib_entry_get_default_chain_type(fib_entry); if (!dpo_id_is_valid(&fib_entry->fe_lb)) { s = format (s, " UNRESOLVED\n"); return (s); } else { s = format(s, " %U-chain\n %U", format_fib_forw_chain_type, fct, format_dpo_id, &fib_entry->fe_lb, 2); s = format(s, "\n"); if (level >= FIB_ENTRY_FORMAT_DETAIL2) { fib_entry_delegate_type_t fdt; fib_entry_delegate_t *fed; s = format (s, " Delegates:\n"); FOR_EACH_DELEGATE(fib_entry, fdt, fed, { s = format(s, " %U\n", format_fib_entry_deletegate, fed); }); } } if (level >= FIB_ENTRY_FORMAT_DETAIL2) { s = format(s, " Children:"); s = fib_node_children_format(fib_entry->fe_node.fn_children, s); } return (s); } static fib_entry_t* fib_entry_from_fib_node (fib_node_t *node) { ASSERT(FIB_NODE_TYPE_ENTRY == node->fn_type); return ((fib_entry_t*)node); } static void fib_entry_last_lock_gone (fib_node_t *node) { fib_entry_delegate_type_t fdt; fib_entry_delegate_t *fed; fib_entry_t *fib_entry; fib_entry = fib_entry_from_fib_node(node); ASSERT(!dpo_id_is_valid(&fib_entry->fe_lb)); FOR_EACH_DELEGATE_CHAIN(fib_entry, fdt, fed, { dpo_reset(&fed->fd_dpo); fib_entry_delegate_remove(fib_entry, fdt); }); FIB_ENTRY_DBG(fib_entry, "last-lock"); fib_node_deinit(&fib_entry->fe_node); ASSERT(0 == vec_len(fib_entry->fe_delegates)); vec_free(fib_entry->fe_delegates); vec_free(fib_entry->fe_srcs); pool_put(fib_entry_pool, fib_entry); } static fib_entry_src_t* fib_entry_get_best_src_i (const fib_entry_t *fib_entry) { fib_entry_src_t *bsrc; /* * the enum of sources is deliberately arranged in priority order */ if (0 == vec_len(fib_entry->fe_srcs)) { bsrc = NULL; } else { bsrc = vec_elt_at_index(fib_entry->fe_srcs, 0); } return (bsrc); } static fib_source_t fib_entry_src_get_source (const fib_entry_src_t *esrc) { if (NULL != esrc) { return (esrc->fes_src); } return (FIB_SOURCE_MAX); } static fib_entry_flag_t fib_entry_src_get_flags (const fib_entry_src_t *esrc) { if (NULL != esrc) { return (esrc->fes_entry_flags); } return (FIB_ENTRY_FLAG_NONE); } fib_entry_flag_t fib_entry_get_flags (fib_node_index_t fib_entry_index) { return (fib_entry_get_flags_i(fib_entry_get(fib_entry_index))); } /* * fib_entry_back_walk_notify * * A back walk has reach this entry. */ static fib_node_back_walk_rc_t fib_entry_back_walk_notify (fib_node_t *node, fib_node_back_walk_ctx_t *ctx) { fib_entry_t *fib_entry; fib_entry = fib_entry_from_fib_node(node); if (FIB_NODE_BW_REASON_FLAG_EVALUATE & ctx->fnbw_reason || FIB_NODE_BW_REASON_FLAG_ADJ_UPDATE & ctx->fnbw_reason || FIB_NODE_BW_REASON_FLAG_ADJ_DOWN & ctx->fnbw_reason || FIB_NODE_BW_REASON_FLAG_INTERFACE_UP & ctx->fnbw_reason || FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN & ctx->fnbw_reason || FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE & ctx->fnbw_reason) { fib_entry_src_action_reactivate(fib_entry, fib_entry_get_best_source( fib_entry_get_index(fib_entry))); } /* * all other walk types can be reclassifed to a re-evaluate to * all recursive dependents. * By reclassifying we ensure that should any of these walk types meet * they can be merged. */ ctx->fnbw_reason = FIB_NODE_BW_REASON_FLAG_EVALUATE; /* * ... and nothing is forced sync from now on. */ ctx->fnbw_flags &= ~FIB_NODE_BW_FLAG_FORCE_SYNC; FIB_ENTRY_DBG(fib_entry, "bw:%U", format_fib_node_bw_reason, ctx->fnbw_reason); /* * propagate the backwalk further if we haven't already reached the * maximum depth. */ fib_walk_sync(FIB_NODE_TYPE_ENTRY, fib_entry_get_index(fib_entry), ctx); return (FIB_NODE_BACK_WALK_CONTINUE); } static void fib_entry_show_memory (void) { u32 n_srcs = 0, n_exts = 0; fib_entry_src_t *esrc; fib_entry_t *entry; fib_show_memory_usage("Entry", pool_elts(fib_entry_pool), pool_len(fib_entry_pool), sizeof(fib_entry_t)); pool_foreach(entry, fib_entry_pool, ({ n_srcs += vec_len(entry->fe_srcs); vec_foreach(esrc, entry->fe_srcs) { n_exts += fib_path_ext_list_length(&esrc->fes_path_exts); } })); fib_show_memory_usage("Entry Source", n_srcs, n_srcs, sizeof(fib_entry_src_t)); fib_show_memory_usage("Entry Path-Extensions", n_exts, n_exts, sizeof(fib_path_ext_t)); } /* * The FIB path-list's graph node virtual function table */ static const fib_node_vft_t fib_entry_vft = { .fnv_get = fib_entry_get_node, .fnv_last_lock = fib_entry_last_lock_gone, .fnv_back_walk = fib_entry_back_walk_notify, .fnv_mem_show = fib_entry_show_memory, }; /** * @brief Contribute the set of Adjacencies that this entry forwards with * to build the uRPF list of its children */ void fib_entry_contribute_urpf (fib_node_index_t entry_index, index_t urpf) { fib_entry_t *fib_entry; fib_entry = fib_entry_get(entry_index); return (fib_path_list_contribute_urpf(fib_entry->fe_parent, urpf)); } /* * If the client is request a chain for multicast forwarding then swap * the chain type to one that can provide such transport. */ static fib_forward_chain_type_t fib_entry_chain_type_mcast_to_ucast (fib_forward_chain_type_t fct) { switch (fct) { case FIB_FORW_CHAIN_TYPE_MCAST_IP4: case FIB_FORW_CHAIN_TYPE_MCAST_IP6: /* * we can only transport IP multicast packets if there is an * LSP. */ fct = FIB_FORW_CHAIN_TYPE_MPLS_EOS; break; case FIB_FORW_CHAIN_TYPE_MPLS_EOS: case FIB_FORW_CHAIN_TYPE_UNICAST_IP4: case FIB_FORW_CHAIN_TYPE_UNICAST_IP6: case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS: case FIB_FORW_CHAIN_TYPE_ETHERNET: case FIB_FORW_CHAIN_TYPE_NSH: case FIB_FORW_CHAIN_TYPE_BIER: break; } return (fct); } /* * fib_entry_contribute_forwarding * * Get an lock the forwarding information (DPO) contributed by the FIB entry. */ void fib_entry_contribute_forwarding (fib_node_index_t fib_entry_index, fib_forward_chain_type_t fct, dpo_id_t *dpo) { fib_entry_delegate_t *fed; fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); /* * mfib children ask for mcast chains. fix these to the appropriate ucast types. */ fct = fib_entry_chain_type_mcast_to_ucast(fct); if (fct == fib_entry_get_default_chain_type(fib_entry)) { dpo_copy(dpo, &fib_entry->fe_lb); } else { fed = fib_entry_delegate_get(fib_entry, fib_entry_chain_type_to_delegate_type(fct)); if (NULL == fed) { fed = fib_entry_delegate_find_or_add( fib_entry, fib_entry_chain_type_to_delegate_type(fct)); /* * on-demand create eos/non-eos. * There is no on-demand delete because: * - memory versus complexity & reliability: * leaving unrequired [n]eos LB arounds wastes memory, cleaning * then up on the right trigger is more code. i favour the latter. */ fib_entry_src_mk_lb(fib_entry, fib_entry_get_best_src_i(fib_entry), fct, &fed->fd_dpo); } dpo_copy(dpo, &fed->fd_dpo); } /* * use the drop DPO is nothing else is present */ if (!dpo_id_is_valid(dpo)) { dpo_copy(dpo, drop_dpo_get(fib_forw_chain_type_to_dpo_proto(fct))); } /* * don't allow the special index indicating replicate.vs.load-balance * to escape to the clients */ dpo->dpoi_index &= ~MPLS_IS_REPLICATE; } const dpo_id_t * fib_entry_contribute_ip_forwarding (fib_node_index_t fib_entry_index) { fib_forward_chain_type_t fct; fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); fct = fib_entry_get_default_chain_type(fib_entry); ASSERT((fct == FIB_FORW_CHAIN_TYPE_UNICAST_IP4 || fct == FIB_FORW_CHAIN_TYPE_UNICAST_IP6)); if (dpo_id_is_valid(&fib_entry->fe_lb)) { return (&fib_entry->fe_lb); } return (drop_dpo_get(fib_forw_chain_type_to_dpo_proto(fct))); } adj_index_t fib_entry_get_adj (fib_node_index_t fib_entry_index) { const dpo_id_t *dpo; dpo = fib_entry_contribute_ip_forwarding(fib_entry_index); if (dpo_id_is_valid(dpo)) { dpo = load_balance_get_bucket(dpo->dpoi_index, 0); if (dpo_is_adj(dpo)) { return (dpo->dpoi_index); } } return (ADJ_INDEX_INVALID); } fib_node_index_t fib_entry_get_path_list (fib_node_index_t fib_entry_index) { fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); return (fib_entry->fe_parent); } u32 fib_entry_child_add (fib_node_index_t fib_entry_index, fib_node_type_t child_type, fib_node_index_t child_index) { return (fib_node_child_add(FIB_NODE_TYPE_ENTRY, fib_entry_index, child_type, child_index)); }; void fib_entry_child_remove (fib_node_index_t fib_entry_index, u32 sibling_index) { fib_node_child_remove(FIB_NODE_TYPE_ENTRY, fib_entry_index, sibling_index); if (0 == fib_node_get_n_children(FIB_NODE_TYPE_ENTRY, fib_entry_index)) { /* * if there are no children left then there is no reason to keep * the non-default forwarding chains. those chains are built only * because the children want them. */ fib_entry_delegate_type_t fdt; fib_entry_delegate_t *fed; fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); FOR_EACH_DELEGATE_CHAIN(fib_entry, fdt, fed, { dpo_reset(&fed->fd_dpo); fib_entry_delegate_remove(fib_entry, fdt); }); } } static fib_entry_t * fib_entry_alloc (u32 fib_index, const fib_prefix_t *prefix, fib_node_index_t *fib_entry_index) { fib_entry_t *fib_entry; fib_prefix_t *fep; pool_get(fib_entry_pool, fib_entry); clib_memset(fib_entry, 0, sizeof(*fib_entry)); fib_node_init(&fib_entry->fe_node, FIB_NODE_TYPE_ENTRY); fib_entry->fe_fib_index = fib_index; /* * the one time we need to update the const prefix is when * the entry is first created */ fep = (fib_prefix_t*)&(fib_entry->fe_prefix); *fep = *prefix; if (FIB_PROTOCOL_MPLS == fib_entry->fe_prefix.fp_proto) { fep->fp_len = 21; if (MPLS_NON_EOS == fep->fp_eos) { fep->fp_payload_proto = DPO_PROTO_MPLS; } ASSERT(DPO_PROTO_NONE != fib_entry->fe_prefix.fp_payload_proto); } dpo_reset(&fib_entry->fe_lb); *fib_entry_index = fib_entry_get_index(fib_entry); return (fib_entry); } static fib_entry_t* fib_entry_post_flag_update_actions (fib_entry_t *fib_entry, fib_entry_flag_t old_flags) { fib_node_index_t fei; /* * save the index so we can recover from pool reallocs */ fei = fib_entry_get_index(fib_entry); /* * handle changes to attached export for import entries */ int is_import = (FIB_ENTRY_FLAG_IMPORT & fib_entry_get_flags_i(fib_entry)); int was_import = (FIB_ENTRY_FLAG_IMPORT & old_flags); if (!was_import && is_import) { /* * transition from not exported to exported */ /* * there is an assumption here that the entry resolves via only * one interface and that it is the cross VRF interface. */ u32 sw_if_index = fib_path_list_get_resolving_interface(fib_entry->fe_parent); fib_attached_export_import(fib_entry, fib_table_get_index_for_sw_if_index( fib_entry_get_proto(fib_entry), sw_if_index)); } else if (was_import && !is_import) { /* * transition from exported to not exported */ fib_attached_export_purge(fib_entry); } /* * else * no change. nothing to do. */ /* * reload the entry address post possible pool realloc */ fib_entry = fib_entry_get(fei); /* * handle changes to attached export for export entries */ int is_attached = (FIB_ENTRY_FLAG_ATTACHED & fib_entry_get_flags_i(fib_entry)); int was_attached = (FIB_ENTRY_FLAG_ATTACHED & old_flags); if (!was_attached && is_attached) { /* * transition to attached. time to export */ // FIXME } // else FIXME return (fib_entry); } static void fib_entry_post_install_actions (fib_entry_t *fib_entry, fib_source_t source, fib_entry_flag_t old_flags) { fib_entry = fib_entry_post_flag_update_actions(fib_entry, old_flags); fib_entry_src_action_installed(fib_entry, source); } fib_node_index_t fib_entry_create (u32 fib_index, const fib_prefix_t *prefix, fib_source_t source, fib_entry_flag_t flags, const fib_route_path_t *paths) { fib_node_index_t fib_entry_index; fib_entry_t *fib_entry; ASSERT(0 < vec_len(paths)); fib_entry = fib_entry_alloc(fib_index, prefix, &fib_entry_index); /* * since this is a new entry create, we don't need to check for winning * sources - there is only one. */ fib_entry = fib_entry_src_action_add(fib_entry, source, flags, drop_dpo_get( fib_proto_to_dpo( fib_entry_get_proto(fib_entry)))); fib_entry_src_action_path_swap(fib_entry, source, flags, paths); /* * handle possible realloc's by refetching the pointer */ fib_entry = fib_entry_get(fib_entry_index); fib_entry_src_action_activate(fib_entry, source); fib_entry_post_install_actions(fib_entry, source, FIB_ENTRY_FLAG_NONE); FIB_ENTRY_DBG(fib_entry, "create"); return (fib_entry_index); } fib_node_index_t fib_entry_create_special (u32 fib_index, const fib_prefix_t *prefix, fib_source_t source, fib_entry_flag_t flags, const dpo_id_t *dpo) { fib_node_index_t fib_entry_index; fib_entry_t *fib_entry; /* * create and initiliase the new enty */ fib_entry = fib_entry_alloc(fib_index, prefix, &fib_entry_index); /* * create the path-list */ fib_entry = fib_entry_src_action_add(fib_entry, source, flags, dpo); fib_entry_src_action_activate(fib_entry, source); fib_entry_post_install_actions(fib_entry, source, FIB_ENTRY_FLAG_NONE); FIB_ENTRY_DBG(fib_entry, "create-special"); return (fib_entry_index); } static void fib_entry_post_update_actions (fib_entry_t *fib_entry, fib_source_t source, fib_entry_flag_t old_flags) { /* * backwalk to children to inform then of the change to forwarding. */ fib_node_back_walk_ctx_t bw_ctx = { .fnbw_reason = FIB_NODE_BW_REASON_FLAG_EVALUATE, }; fib_walk_sync(FIB_NODE_TYPE_ENTRY, fib_entry_get_index(fib_entry), &bw_ctx); /* * then inform any covered prefixes */ fib_entry_cover_update_notify(fib_entry); fib_entry_post_install_actions(fib_entry, source, old_flags); } void fib_entry_recalculate_forwarding (fib_node_index_t fib_entry_index) { fib_source_t best_source; fib_entry_t *fib_entry; fib_entry_src_t *bsrc; fib_entry = fib_entry_get(fib_entry_index); bsrc = fib_entry_get_best_src_i(fib_entry); best_source = fib_entry_src_get_source(bsrc); fib_entry_src_action_reactivate(fib_entry, best_source); } static void fib_entry_source_change_w_flags (fib_entry_t *fib_entry, fib_source_t old_source, fib_entry_flag_t old_flags, fib_source_t new_source) { if (new_source < old_source) { /* * we have a new winning source. */ fib_entry_src_action_deactivate(fib_entry, old_source); fib_entry_src_action_activate(fib_entry, new_source); } else if (new_source > old_source) { /* * the new source loses. Re-activate the winning sources * in case it is an interposer and hence relied on the losing * source's path-list. */ fib_entry_src_action_reactivate(fib_entry, old_source); return; } else { /* * the new source is one this entry already has. * But the path-list was updated, which will contribute new forwarding, * so install it. */ fib_entry_src_action_reactivate(fib_entry, new_source); } fib_entry_post_update_actions(fib_entry, new_source, old_flags); } void fib_entry_source_change (fib_entry_t *fib_entry, fib_source_t old_source, fib_source_t new_source) { fib_entry_flag_t old_flags; old_flags = fib_entry_get_flags_for_source( fib_entry_get_index(fib_entry), old_source); return (fib_entry_source_change_w_flags(fib_entry, old_source, old_flags, new_source)); } void fib_entry_special_add (fib_node_index_t fib_entry_index, fib_source_t source, fib_entry_flag_t flags, const dpo_id_t *dpo) { fib_source_t best_source; fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); best_source = fib_entry_get_best_source(fib_entry_index); fib_entry = fib_entry_src_action_add(fib_entry, source, flags, dpo); fib_entry_source_change(fib_entry, best_source, source); FIB_ENTRY_DBG(fib_entry, "special-add:%U", format_fib_source, source); } void fib_entry_special_update (fib_node_index_t fib_entry_index, fib_source_t source, fib_entry_flag_t flags, const dpo_id_t *dpo) { fib_source_t best_source; fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); best_source = fib_entry_get_best_source(fib_entry_index); fib_entry = fib_entry_src_action_update(fib_entry, source, flags, dpo); fib_entry_source_change(fib_entry, best_source, source); FIB_ENTRY_DBG(fib_entry, "special-updated:%U", format_fib_source, source); } void fib_entry_path_add (fib_node_index_t fib_entry_index, fib_source_t source, fib_entry_flag_t flags, const fib_route_path_t *rpath) { fib_source_t best_source; fib_entry_t *fib_entry; fib_entry_src_t *bsrc; ASSERT(1 == vec_len(rpath)); fib_entry = fib_entry_get(fib_entry_index); ASSERT(NULL != fib_entry); bsrc = fib_entry_get_best_src_i(fib_entry); best_source = fib_entry_src_get_source(bsrc); fib_entry = fib_entry_src_action_path_add(fib_entry, source, flags, rpath); fib_entry_source_change(fib_entry, best_source, source); FIB_ENTRY_DBG(fib_entry, "path add:%U", format_fib_source, source); } static fib_entry_src_flag_t fib_entry_src_burn_only_inherited (fib_entry_t *fib_entry) { fib_entry_src_t *src; fib_source_t source; int has_only_inherited_sources = 1; FOR_EACH_SRC_ADDED(fib_entry, src, source, ({ if (!(src->fes_flags & FIB_ENTRY_SRC_FLAG_INHERITED)) { has_only_inherited_sources = 0; break; } })); if (has_only_inherited_sources) { FOR_EACH_SRC_ADDED(fib_entry, src, source, ({ fib_entry_src_action_remove(fib_entry, source); })); return (FIB_ENTRY_SRC_FLAG_NONE); } else { return (FIB_ENTRY_SRC_FLAG_ADDED); } } static fib_entry_src_flag_t fib_entry_source_removed (fib_entry_t *fib_entry, fib_entry_flag_t old_flags) { const fib_entry_src_t *bsrc; fib_source_t best_source; /* * if all that is left are inherited sources, then burn them */ fib_entry_src_burn_only_inherited(fib_entry); bsrc = fib_entry_get_best_src_i(fib_entry); best_source = fib_entry_src_get_source(bsrc); if (FIB_SOURCE_MAX == best_source) { /* * no more sources left. this entry is toast. */ fib_entry = fib_entry_post_flag_update_actions(fib_entry, old_flags); fib_entry_src_action_uninstall(fib_entry); return (FIB_ENTRY_SRC_FLAG_NONE); } else { fib_entry_src_action_activate(fib_entry, best_source); } fib_entry_post_update_actions(fib_entry, best_source, old_flags); /* * still have sources */ return (FIB_ENTRY_SRC_FLAG_ADDED); } /* * fib_entry_path_remove * * remove a path from the entry. * return the fib_entry's index if it is still present, INVALID otherwise. */ fib_entry_src_flag_t fib_entry_path_remove (fib_node_index_t fib_entry_index, fib_source_t source, const fib_route_path_t *rpath) { fib_entry_src_flag_t sflag; fib_source_t best_source; fib_entry_flag_t bflags; fib_entry_t *fib_entry; fib_entry_src_t *bsrc; ASSERT(1 == vec_len(rpath)); fib_entry = fib_entry_get(fib_entry_index); ASSERT(NULL != fib_entry); bsrc = fib_entry_get_best_src_i(fib_entry); best_source = fib_entry_src_get_source(bsrc); bflags = fib_entry_src_get_flags(bsrc); sflag = fib_entry_src_action_path_remove(fib_entry, source, rpath); FIB_ENTRY_DBG(fib_entry, "path remove:%U", format_fib_source, source); /* * if the path list for the source passed is invalid, * then we need to create a new one. else we are updating * an existing. */ if (source < best_source) { /* * Que! removing a path from a source that is better than the * one this entry is using. */ ASSERT(0); } else if (source > best_source ) { /* * the source is not the best. no need to update forwarding */ if (FIB_ENTRY_SRC_FLAG_ADDED & sflag) { /* * the source being removed still has paths */ return (FIB_ENTRY_SRC_FLAG_ADDED); } else { /* * that was the last path from this source, check if those * that remain are non-inherited */ return (fib_entry_src_burn_only_inherited(fib_entry)); } } else { /* * removing a path from the path-list we were using. */ if (!(FIB_ENTRY_SRC_FLAG_ADDED & sflag)) { /* * the last path from the source was removed. * fallback to lower source */ return (fib_entry_source_removed(fib_entry, bflags)); } else { /* * re-install the new forwarding information */ fib_entry_src_action_reactivate(fib_entry, source); } } fib_entry_post_update_actions(fib_entry, source, bflags); /* * still have sources */ return (FIB_ENTRY_SRC_FLAG_ADDED); } /* * fib_entry_special_remove * * remove a special source from the entry. * return the fib_entry's index if it is still present, INVALID otherwise. */ fib_entry_src_flag_t fib_entry_special_remove (fib_node_index_t fib_entry_index, fib_source_t source) { fib_entry_src_flag_t sflag; fib_source_t best_source; fib_entry_flag_t bflags; fib_entry_t *fib_entry; fib_entry_src_t *bsrc; fib_entry = fib_entry_get(fib_entry_index); ASSERT(NULL != fib_entry); bsrc = fib_entry_get_best_src_i(fib_entry); best_source = fib_entry_src_get_source(bsrc); bflags = fib_entry_src_get_flags(bsrc); sflag = fib_entry_src_action_remove_or_update_inherit(fib_entry, source); FIB_ENTRY_DBG(fib_entry, "special remove:%U", format_fib_source, source); /* * if the path list for the source passed is invalid, * then we need to create a new one. else we are updating * an existing. */ if (source < best_source ) { /* * Que! removing a path from a source that is better than the * one this entry is using. This can only mean it is a source * this prefix does not have. */ return (FIB_ENTRY_SRC_FLAG_ADDED); } else if (source > best_source ) { /* * the source is not the best. no need to update forwarding */ if (FIB_ENTRY_SRC_FLAG_ADDED & sflag) { /* * the source being removed still has paths */ return (FIB_ENTRY_SRC_FLAG_ADDED); } else { /* * that was the last path from this source, check if those * that remain are non-inherited */ if (FIB_ENTRY_SRC_FLAG_NONE == fib_entry_src_burn_only_inherited(fib_entry)) { /* * no more sources left. this entry is toast. */ fib_entry = fib_entry_post_flag_update_actions(fib_entry, bflags); fib_entry_src_action_uninstall(fib_entry); return (FIB_ENTRY_SRC_FLAG_NONE); } /* * reactivate the best source so the interposer gets restacked */ fib_entry_src_action_reactivate(fib_entry, best_source); return (FIB_ENTRY_SRC_FLAG_ADDED); } } else { if (!(FIB_ENTRY_SRC_FLAG_ADDED & sflag)) { /* * the source was removed. use the next best. */ return (fib_entry_source_removed(fib_entry, bflags)); } else { /* * re-install the new forwarding information */ fib_entry_src_action_reactivate(fib_entry, source); } } fib_entry_post_update_actions(fib_entry, source, bflags); /* * still have sources */ return (FIB_ENTRY_SRC_FLAG_ADDED); } /** * fib_entry_inherit * * If the source on the cover is inherting then push this source * down to the covered. */ void fib_entry_inherit (fib_node_index_t cover, fib_node_index_t covered) { fib_entry_src_inherit(fib_entry_get(cover), fib_entry_get(covered)); } /** * fib_entry_delete * * The source is withdrawing all the paths it provided */ fib_entry_src_flag_t fib_entry_delete (fib_node_index_t fib_entry_index, fib_source_t source) { return (fib_entry_special_remove(fib_entry_index, source)); } /** * fib_entry_update * * The source has provided a new set of paths that will replace the old. */ void fib_entry_update (fib_node_index_t fib_entry_index, fib_source_t source, fib_entry_flag_t flags, const fib_route_path_t *paths) { fib_source_t best_source; fib_entry_flag_t bflags; fib_entry_t *fib_entry; fib_entry_src_t *bsrc; fib_entry = fib_entry_get(fib_entry_index); ASSERT(NULL != fib_entry); bsrc = fib_entry_get_best_src_i(fib_entry); best_source = fib_entry_src_get_source(bsrc); bflags = fib_entry_get_flags_i(fib_entry); fib_entry = fib_entry_src_action_path_swap(fib_entry, source, flags, paths); fib_entry_source_change_w_flags(fib_entry, best_source, bflags, source); FIB_ENTRY_DBG(fib_entry, "update"); } /* * fib_entry_cover_changed * * this entry is tracking its cover and that cover has changed. */ void fib_entry_cover_changed (fib_node_index_t fib_entry_index) { fib_entry_src_cover_res_t res = { .install = !0, .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE, }; CLIB_UNUSED(fib_source_t source); fib_source_t best_source; fib_entry_flag_t bflags; fib_entry_t *fib_entry; fib_entry_src_t *esrc; u32 index; bflags = FIB_ENTRY_FLAG_NONE; best_source = FIB_SOURCE_FIRST; fib_entry = fib_entry_get(fib_entry_index); fib_attached_export_cover_change(fib_entry); /* * propagate the notificuation to each of the added sources */ index = 0; FOR_EACH_SRC_ADDED(fib_entry, esrc, source, ({ if (0 == index) { /* * only the best source gets to set the back walk flags */ res = fib_entry_src_action_cover_change(fib_entry, esrc); bflags = fib_entry_src_get_flags(esrc); best_source = fib_entry_src_get_source(esrc); } else { fib_entry_src_action_cover_change(fib_entry, esrc); } index++; })); if (res.install) { fib_entry_src_action_reactivate(fib_entry, fib_entry_src_get_source( fib_entry_get_best_src_i(fib_entry))); fib_entry_post_install_actions(fib_entry, best_source, bflags); } else { fib_entry_src_action_uninstall(fib_entry); } if (FIB_NODE_BW_REASON_FLAG_NONE != res.bw_reason) { /* * time for walkies fido. */ fib_node_back_walk_ctx_t bw_ctx = { .fnbw_reason = res.bw_reason, }; fib_walk_sync(FIB_NODE_TYPE_ENTRY, fib_entry_index, &bw_ctx); } FIB_ENTRY_DBG(fib_entry, "cover-changed"); } /* * fib_entry_cover_updated * * this entry is tracking its cover and that cover has been updated * (i.e. its forwarding information has changed). */ void fib_entry_cover_updated (fib_node_index_t fib_entry_index) { fib_entry_src_cover_res_t res = { .install = !0, .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE, }; CLIB_UNUSED(fib_source_t source); fib_source_t best_source; fib_entry_flag_t bflags; fib_entry_t *fib_entry; fib_entry_src_t *esrc; u32 index; bflags = FIB_ENTRY_FLAG_NONE; best_source = FIB_SOURCE_FIRST; fib_entry = fib_entry_get(fib_entry_index); fib_attached_export_cover_update(fib_entry); /* * propagate the notificuation to each of the added sources */ index = 0; FOR_EACH_SRC_ADDED(fib_entry, esrc, source, ({ if (0 == index) { /* * only the best source gets to set the back walk flags */ res = fib_entry_src_action_cover_update(fib_entry, esrc); bflags = fib_entry_src_get_flags(esrc); best_source = fib_entry_src_get_source(esrc); } else { fib_entry_src_action_cover_update(fib_entry, esrc); } index++; })); if (res.install) { fib_entry_src_action_reactivate(fib_entry, fib_entry_src_get_source( fib_entry_get_best_src_i(fib_entry))); fib_entry_post_install_actions(fib_entry, best_source, bflags); } else { fib_entry_src_action_uninstall(fib_entry); } if (FIB_NODE_BW_REASON_FLAG_NONE != res.bw_reason) { /* * time for walkies fido. */ fib_node_back_walk_ctx_t bw_ctx = { .fnbw_reason = res.bw_reason, }; fib_walk_sync(FIB_NODE_TYPE_ENTRY, fib_entry_index, &bw_ctx); } FIB_ENTRY_DBG(fib_entry, "cover-updated"); } int fib_entry_recursive_loop_detect (fib_node_index_t entry_index, fib_node_index_t **entry_indicies) { fib_entry_t *fib_entry; int was_looped, is_looped; fib_entry = fib_entry_get(entry_index); if (FIB_NODE_INDEX_INVALID != fib_entry->fe_parent) { fib_node_index_t *entries = *entry_indicies; vec_add1(entries, entry_index); was_looped = fib_path_list_is_looped(fib_entry->fe_parent); is_looped = fib_path_list_recursive_loop_detect(fib_entry->fe_parent, &entries); *entry_indicies = entries; if (!!was_looped != !!is_looped) { /* * re-evaluate all the entry's forwarding * NOTE: this is an inplace modify */ fib_entry_delegate_type_t fdt; fib_entry_delegate_t *fed; FOR_EACH_DELEGATE_CHAIN(fib_entry, fdt, fed, { fib_entry_src_mk_lb(fib_entry, fib_entry_get_best_src_i(fib_entry), fib_entry_delegate_type_to_chain_type(fdt), &fed->fd_dpo); }); } } else { /* * the entry is currently not linked to a path-list. this happens * when it is this entry that is re-linking path-lists and has thus * broken the loop */ is_looped = 0; } return (is_looped); } u32 fib_entry_get_resolving_interface (fib_node_index_t entry_index) { fib_entry_t *fib_entry; fib_entry = fib_entry_get(entry_index); return (fib_path_list_get_resolving_interface(fib_entry->fe_parent)); } fib_source_t fib_entry_get_best_source (fib_node_index_t entry_index) { fib_entry_t *fib_entry; fib_entry_src_t *bsrc; fib_entry = fib_entry_get(entry_index); bsrc = fib_entry_get_best_src_i(fib_entry); return (fib_entry_src_get_source(bsrc)); } /** * Return !0 is the entry represents a host prefix */ int fib_entry_is_host (fib_node_index_t fib_entry_index) { return (fib_prefix_is_host(fib_entry_get_prefix(fib_entry_index))); } /** * Return !0 is the entry is reoslved, i.e. will return a valid forwarding * chain */ int fib_entry_is_resolved (fib_node_index_t fib_entry_index) { fib_entry_delegate_t *fed; fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); fed = fib_entry_delegate_get(fib_entry, FIB_ENTRY_DELEGATE_BFD); if (NULL == fed) { /* * no BFD tracking - consider it resolved. */ return (!0); } else { /* * defer to the state of the BFD tracking */ return (FIB_BFD_STATE_UP == fed->fd_bfd_state); } } void fib_entry_set_flow_hash_config (fib_node_index_t fib_entry_index, flow_hash_config_t hash_config) { fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); /* * pass the hash-config on to the load-balance object where it is cached. * we can ignore LBs in the delegate chains, since they will not be of the * correct protocol type (i.e. they are not IP) * There's no way, nor need, to change the hash config for MPLS. */ if (dpo_id_is_valid(&fib_entry->fe_lb)) { load_balance_t *lb; ASSERT(DPO_LOAD_BALANCE == fib_entry->fe_lb.dpoi_type); lb = load_balance_get(fib_entry->fe_lb.dpoi_index); /* * atomic update for packets in flight */ lb->lb_hash_config = hash_config; } } u32 fib_entry_get_stats_index (fib_node_index_t fib_entry_index) { fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); return (fib_entry->fe_lb.dpoi_index); } static int fib_ip4_address_compare (const ip4_address_t * a1, const ip4_address_t * a2) { /* * IP addresses are unsiged ints. the return value here needs to be signed * a simple subtraction won't cut it. * If the addresses are the same, the sort order is undefiend, so phoey. */ return ((clib_net_to_host_u32(a1->data_u32) > clib_net_to_host_u32(a2->data_u32) ) ? 1 : -1); } static int fib_ip6_address_compare (const ip6_address_t * a1, const ip6_address_t * a2) { int i; for (i = 0; i < ARRAY_LEN (a1->as_u16); i++) { int cmp = (clib_net_to_host_u16 (a1->as_u16[i]) - clib_net_to_host_u16 (a2->as_u16[i])); if (cmp != 0) return cmp; } return 0; } static int fib_entry_cmp (fib_node_index_t fib_entry_index1, fib_node_index_t fib_entry_index2) { fib_entry_t *fib_entry1, *fib_entry2; int cmp = 0; fib_entry1 = fib_entry_get(fib_entry_index1); fib_entry2 = fib_entry_get(fib_entry_index2); switch (fib_entry1->fe_prefix.fp_proto) { case FIB_PROTOCOL_IP4: cmp = fib_ip4_address_compare(&fib_entry1->fe_prefix.fp_addr.ip4, &fib_entry2->fe_prefix.fp_addr.ip4); break; case FIB_PROTOCOL_IP6: cmp = fib_ip6_address_compare(&fib_entry1->fe_prefix.fp_addr.ip6, &fib_entry2->fe_prefix.fp_addr.ip6); break; case FIB_PROTOCOL_MPLS: cmp = (fib_entry1->fe_prefix.fp_label - fib_entry2->fe_prefix.fp_label); if (0 == cmp) { cmp = (fib_entry1->fe_prefix.fp_eos - fib_entry2->fe_prefix.fp_eos); } break; } if (0 == cmp) { cmp = (fib_entry1->fe_prefix.fp_len - fib_entry2->fe_prefix.fp_len); } return (cmp); } int fib_entry_cmp_for_sort (void *i1, void *i2) { fib_node_index_t *fib_entry_index1 = i1, *fib_entry_index2 = i2; return (fib_entry_cmp(*fib_entry_index1, *fib_entry_index2)); } void fib_entry_lock (fib_node_index_t fib_entry_index) { fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); fib_node_lock(&fib_entry->fe_node); } void fib_entry_unlock (fib_node_index_t fib_entry_index) { fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); fib_node_unlock(&fib_entry->fe_node); } void fib_entry_module_init (void) { fib_node_register_type(FIB_NODE_TYPE_ENTRY, &fib_entry_vft); fib_entry_logger = vlib_log_register_class("fib", "entry"); } void fib_entry_encode (fib_node_index_t fib_entry_index, fib_route_path_encode_t **api_rpaths) { fib_path_ext_list_t *ext_list; fib_entry_t *fib_entry; fib_entry_src_t *bsrc; ext_list = NULL; fib_entry = fib_entry_get(fib_entry_index); bsrc = fib_entry_get_best_src_i(fib_entry); if (bsrc) { ext_list = &bsrc->fes_path_exts; } if (FIB_NODE_INDEX_INVALID != fib_entry->fe_parent) { fib_path_list_walk_w_ext(fib_entry->fe_parent, ext_list, fib_path_encode, api_rpaths); } } const fib_prefix_t * fib_entry_get_prefix (fib_node_index_t fib_entry_index) { fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); return (&fib_entry->fe_prefix); } u32 fib_entry_get_fib_index (fib_node_index_t fib_entry_index) { fib_entry_t *fib_entry; fib_entry = fib_entry_get(fib_entry_index); return (fib_entry->fe_fib_index); } u32 fib_entry_pool_size (void) { return (pool_elts(fib_entry_pool)); } static clib_error_t * show_fib_entry_command (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { fib_node_index_t fei; if (unformat (input, "%d", &fei)) { /* * show one in detail */ if (!pool_is_free_index(fib_entry_pool, fei)) { vlib_cli_output (vm, "%d@%U", fei, format_fib_entry, fei, FIB_ENTRY_FORMAT_DETAIL2); } else { vlib_cli_output (vm, "entry %d invalid", fei); } } else { /* * show all */ vlib_cli_output (vm, "FIB Entries:"); pool_foreach_index(fei, fib_entry_pool, ({ vlib_cli_output (vm, "%d@%U", fei, format_fib_entry, fei, FIB_ENTRY_FORMAT_BRIEF); })); } return (NULL); } VLIB_CLI_COMMAND (show_fib_entry, static) = { .path = "show fib entry", .function = show_fib_entry_command, .short_help = "show fib entry", };