| /* |
| * 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 <vnet/mfib/ip4_mfib.h> |
| |
| #include <vnet/mfib/mfib_table.h> |
| #include <vnet/mfib/mfib_entry.h> |
| |
| static const mfib_prefix_t all_zeros = |
| { |
| .fp_proto = FIB_PROTOCOL_IP4, |
| }; |
| static const mfib_prefix_t ip4_specials[] = |
| { |
| /* ALL prefixes are in network order */ |
| { |
| /* (*,224.0.0.1)/32 - all hosts */ |
| .fp_grp_addr = { |
| .ip4.data_u32 = 0x010000e0, |
| }, |
| .fp_len = 32, |
| .fp_proto = FIB_PROTOCOL_IP4, |
| }, |
| { |
| /* (*,224.0.0.2)/32 - all routers */ |
| .fp_grp_addr = { |
| .ip4.data_u32 = 0x020000e0, |
| }, |
| .fp_len = 32, |
| .fp_proto = FIB_PROTOCOL_IP4, |
| }, |
| }; |
| |
| static u32 |
| ip4_create_mfib_with_table_id (u32 table_id, |
| mfib_source_t src) |
| { |
| mfib_table_t *mfib_table; |
| |
| pool_get_aligned(ip4_main.mfibs, mfib_table, CLIB_CACHE_LINE_BYTES); |
| clib_memset(mfib_table, 0, sizeof(*mfib_table)); |
| |
| mfib_table->mft_proto = FIB_PROTOCOL_IP4; |
| mfib_table->mft_index = |
| mfib_table->v4.index = |
| (mfib_table - ip4_main.mfibs); |
| |
| hash_set (ip4_main.mfib_index_by_table_id, |
| table_id, |
| mfib_table->mft_index); |
| |
| mfib_table->mft_table_id = |
| mfib_table->v4.table_id = |
| table_id; |
| |
| mfib_table_lock(mfib_table->mft_index, FIB_PROTOCOL_IP4, src); |
| |
| /* |
| * add the default route into the new FIB |
| */ |
| mfib_table_entry_update(mfib_table->mft_index, |
| &all_zeros, |
| MFIB_SOURCE_DEFAULT_ROUTE, |
| MFIB_RPF_ID_NONE, |
| MFIB_ENTRY_FLAG_DROP); |
| |
| const fib_route_path_t path = { |
| .frp_proto = DPO_PROTO_IP4, |
| .frp_addr = zero_addr, |
| .frp_sw_if_index = ~0, |
| .frp_fib_index = ~0, |
| .frp_weight = 1, |
| .frp_flags = FIB_ROUTE_PATH_LOCAL, |
| .frp_mitf_flags = MFIB_ITF_FLAG_FORWARD, |
| }; |
| int ii; |
| |
| for (ii = 0; ii < ARRAY_LEN(ip4_specials); ii++) |
| { |
| mfib_table_entry_path_update(mfib_table->mft_index, |
| &ip4_specials[ii], |
| MFIB_SOURCE_SPECIAL, |
| &path); |
| } |
| |
| return (mfib_table->mft_index); |
| } |
| |
| void |
| ip4_mfib_table_destroy (ip4_mfib_t *mfib) |
| { |
| mfib_table_t *mfib_table = (mfib_table_t*)mfib; |
| int ii; |
| |
| /* |
| * remove all the specials we added when the table was created. |
| */ |
| mfib_table_entry_delete(mfib_table->mft_index, |
| &all_zeros, |
| MFIB_SOURCE_DEFAULT_ROUTE); |
| |
| for (ii = 0; ii < ARRAY_LEN(ip4_specials); ii++) |
| { |
| mfib_table_entry_delete(mfib_table->mft_index, |
| &ip4_specials[ii], |
| MFIB_SOURCE_SPECIAL); |
| } |
| |
| /* |
| * validate no more routes. |
| */ |
| ASSERT(0 == mfib_table->mft_total_route_counts); |
| ASSERT(~0 != mfib_table->mft_table_id); |
| |
| hash_unset (ip4_main.mfib_index_by_table_id, mfib_table->mft_table_id); |
| pool_put(ip4_main.mfibs, mfib_table); |
| } |
| |
| void |
| ip4_mfib_interface_enable_disable (u32 sw_if_index, int is_enable) |
| { |
| const fib_route_path_t path = { |
| .frp_proto = DPO_PROTO_IP4, |
| .frp_addr = zero_addr, |
| .frp_sw_if_index = sw_if_index, |
| .frp_fib_index = ~0, |
| .frp_weight = 1, |
| .frp_mitf_flags = MFIB_ITF_FLAG_ACCEPT, |
| }; |
| u32 mfib_index; |
| int ii; |
| |
| mfib_index = ip4_mfib_table_get_index_for_sw_if_index(sw_if_index); |
| |
| for (ii = 0; ii < ARRAY_LEN(ip4_specials); ii++) |
| { |
| if (is_enable) |
| { |
| mfib_table_entry_path_update(mfib_index, |
| &ip4_specials[ii], |
| MFIB_SOURCE_SPECIAL, |
| &path); |
| } |
| else |
| { |
| mfib_table_entry_path_remove(mfib_index, |
| &ip4_specials[ii], |
| MFIB_SOURCE_SPECIAL, |
| &path); |
| } |
| } |
| } |
| |
| u32 |
| ip4_mfib_table_find_or_create_and_lock (u32 table_id, |
| mfib_source_t src) |
| { |
| u32 index; |
| |
| index = ip4_mfib_index_from_table_id(table_id); |
| if (~0 == index) |
| return ip4_create_mfib_with_table_id(table_id, src); |
| mfib_table_lock(index, FIB_PROTOCOL_IP4, src); |
| |
| return (index); |
| } |
| |
| u32 |
| ip4_mfib_table_get_index_for_sw_if_index (u32 sw_if_index) |
| { |
| if (sw_if_index >= vec_len(ip4_main.mfib_index_by_sw_if_index)) |
| { |
| /* |
| * This is the case for interfaces that are not yet mapped to |
| * a IP table |
| */ |
| return (~0); |
| } |
| return (ip4_main.mfib_index_by_sw_if_index[sw_if_index]); |
| } |
| |
| #define IPV4_MFIB_GRP_LEN(_len)\ |
| (_len > 32 ? 32 : _len) |
| |
| #define IP4_MFIB_MK_KEY(_grp, _src, _len, _key) \ |
| { \ |
| _key = ((u64)(_grp->data_u32 & \ |
| ip4_main.fib_masks[IPV4_MFIB_GRP_LEN(_len)])) << 32; \ |
| _key |= _src->data_u32; \ |
| } |
| #define IP4_MFIB_MK_GRP_KEY(_grp, _len, _key) \ |
| { \ |
| _key = ((u64)(_grp->data_u32 & \ |
| ip4_main.fib_masks[IPV4_MFIB_GRP_LEN(_len)])) << 32; \ |
| } |
| |
| /* |
| * ip4_fib_table_lookup_exact_match |
| * |
| * Exact match prefix lookup |
| */ |
| fib_node_index_t |
| ip4_mfib_table_lookup_exact_match (const ip4_mfib_t *mfib, |
| const ip4_address_t *grp, |
| const ip4_address_t *src, |
| u32 len) |
| { |
| uword * hash, * result; |
| u64 key; |
| |
| hash = mfib->fib_entry_by_dst_address[len]; |
| IP4_MFIB_MK_KEY(grp, src, len, key); |
| |
| result = hash_get(hash, key); |
| |
| if (NULL != result) { |
| return (result[0]); |
| } |
| return (FIB_NODE_INDEX_INVALID); |
| } |
| |
| /* |
| * ip4_fib_table_lookup |
| * |
| * Longest prefix match |
| */ |
| fib_node_index_t |
| ip4_mfib_table_lookup (const ip4_mfib_t *mfib, |
| const ip4_address_t *src, |
| const ip4_address_t *grp, |
| u32 len) |
| { |
| uword * hash, * result; |
| i32 mask_len; |
| u64 key; |
| |
| mask_len = len; |
| |
| if (PREDICT_TRUE(64 == mask_len)) |
| { |
| hash = mfib->fib_entry_by_dst_address[mask_len]; |
| IP4_MFIB_MK_KEY(grp, src, mask_len, key); |
| |
| result = hash_get (hash, key); |
| |
| if (NULL != result) { |
| return (result[0]); |
| } |
| } |
| |
| for (mask_len = (len == 64 ? 32 : len); mask_len >= 0; mask_len--) |
| { |
| hash = mfib->fib_entry_by_dst_address[mask_len]; |
| IP4_MFIB_MK_GRP_KEY(grp, mask_len, key); |
| |
| result = hash_get (hash, key); |
| |
| if (NULL != result) { |
| return (result[0]); |
| } |
| } |
| return (FIB_NODE_INDEX_INVALID); |
| } |
| |
| fib_node_index_t |
| ip4_mfib_table_get_less_specific (const ip4_mfib_t *mfib, |
| const ip4_address_t *src, |
| const ip4_address_t *grp, |
| u32 len) |
| { |
| u32 mask_len; |
| |
| /* |
| * in the absence of a tree structure for the table that allows for an O(1) |
| * parent get, a cheeky way to find the cover is to LPM for the prefix with |
| * mask-1. |
| * there should always be a cover, though it may be the default route. the |
| * default route's cover is the default route. |
| */ |
| if (len == 64) |
| { |
| /* go from (S,G) to (*,G*) */ |
| mask_len = 32; |
| } |
| else if (len != 0) |
| { |
| mask_len = len - 1; |
| } |
| else |
| { |
| mask_len = len; |
| } |
| |
| return (ip4_mfib_table_lookup(mfib, src, grp, mask_len)); |
| } |
| |
| void |
| ip4_mfib_table_entry_insert (ip4_mfib_t *mfib, |
| const ip4_address_t *grp, |
| const ip4_address_t *src, |
| u32 len, |
| fib_node_index_t fib_entry_index) |
| { |
| uword * hash, * result; |
| u64 key; |
| |
| IP4_MFIB_MK_KEY(grp, src, len, key); |
| hash = mfib->fib_entry_by_dst_address[len]; |
| result = hash_get (hash, key); |
| |
| if (NULL == result) { |
| /* |
| * adding a new entry |
| */ |
| if (NULL == hash) { |
| hash = hash_create (32 /* elts */, sizeof (uword)); |
| hash_set_flags (hash, HASH_FLAG_NO_AUTO_SHRINK); |
| } |
| hash = hash_set(hash, key, fib_entry_index); |
| mfib->fib_entry_by_dst_address[len] = hash; |
| } |
| else |
| { |
| ASSERT(0); |
| } |
| } |
| |
| void |
| ip4_mfib_table_entry_remove (ip4_mfib_t *mfib, |
| const ip4_address_t *grp, |
| const ip4_address_t *src, |
| u32 len) |
| { |
| uword * hash, * result; |
| u64 key; |
| |
| IP4_MFIB_MK_KEY(grp, src, len, key); |
| hash = mfib->fib_entry_by_dst_address[len]; |
| result = hash_get (hash, key); |
| |
| if (NULL == result) |
| { |
| /* |
| * removing a non-existent entry. i'll allow it. |
| */ |
| } |
| else |
| { |
| hash_unset(hash, key); |
| } |
| |
| mfib->fib_entry_by_dst_address[len] = hash; |
| } |
| |
| void |
| ip4_mfib_table_walk (ip4_mfib_t *mfib, |
| mfib_table_walk_fn_t fn, |
| void *ctx) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_LEN (mfib->fib_entry_by_dst_address); i++) |
| { |
| uword * hash = mfib->fib_entry_by_dst_address[i]; |
| |
| if (NULL != hash) |
| { |
| hash_pair_t * p; |
| |
| hash_foreach_pair (p, hash, |
| ({ |
| fn(p->value[0], ctx); |
| })); |
| } |
| } |
| } |
| |
| u8 * |
| format_ip4_mfib_table_memory (u8 * s, va_list * args) |
| { |
| mfib_table_t *mfib_table; |
| u64 total_memory; |
| |
| total_memory = 0; |
| |
| pool_foreach (mfib_table, ip4_main.mfibs) |
| { |
| ip4_mfib_t *mfib = &mfib_table->v4; |
| uword mfib_size; |
| int i; |
| |
| mfib_size = 0; |
| |
| for (i = 0; i < ARRAY_LEN (mfib->fib_entry_by_dst_address); i++) |
| { |
| uword * hash = mfib->fib_entry_by_dst_address[i]; |
| |
| if (NULL != hash) |
| { |
| mfib_size += hash_bytes(hash); |
| } |
| } |
| |
| total_memory += mfib_size; |
| } |
| |
| s = format(s, "%=30s %=6d %=12ld\n", |
| "IPv4 multicast", |
| pool_elts(ip4_main.mfibs), total_memory); |
| |
| return (s); |
| } |
| |
| static void |
| ip4_mfib_table_show_all (ip4_mfib_t *mfib, |
| vlib_main_t * vm) |
| { |
| fib_node_index_t *mfib_entry_indicies; |
| fib_node_index_t *mfib_entry_index; |
| int i; |
| |
| mfib_entry_indicies = NULL; |
| |
| for (i = 0; i < ARRAY_LEN (mfib->fib_entry_by_dst_address); i++) |
| { |
| uword * hash = mfib->fib_entry_by_dst_address[i]; |
| |
| if (NULL != hash) |
| { |
| hash_pair_t * p; |
| |
| hash_foreach_pair (p, hash, |
| ({ |
| vec_add1(mfib_entry_indicies, p->value[0]); |
| })); |
| } |
| } |
| |
| vec_sort_with_function(mfib_entry_indicies, mfib_entry_cmp_for_sort); |
| |
| vec_foreach(mfib_entry_index, mfib_entry_indicies) |
| { |
| vlib_cli_output(vm, "%U", |
| format_mfib_entry, |
| *mfib_entry_index, |
| MFIB_ENTRY_FORMAT_BRIEF); |
| } |
| |
| vec_free(mfib_entry_indicies); |
| } |
| |
| static void |
| ip4_mfib_table_show_one (ip4_mfib_t *mfib, |
| vlib_main_t * vm, |
| ip4_address_t *src, |
| ip4_address_t *grp, |
| u32 mask_len) |
| { |
| vlib_cli_output(vm, "%U", |
| format_mfib_entry, |
| ip4_mfib_table_lookup(mfib, src, grp, mask_len), |
| MFIB_ENTRY_FORMAT_DETAIL); |
| } |
| |
| static clib_error_t * |
| ip4_show_mfib (vlib_main_t * vm, |
| unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| ip4_main_t * im4 = &ip4_main; |
| mfib_table_t *mfib_table; |
| int verbose, matching, memory; |
| ip4_address_t grp, src = {{0}}; |
| u32 mask = 32; |
| u64 total_hash_memory; |
| int i, table_id = -1, fib_index = ~0; |
| |
| verbose = 1; |
| memory = matching = 0; |
| total_hash_memory = 0; |
| |
| while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
| { |
| if (unformat (input, "brief") || unformat (input, "summary") |
| || unformat (input, "sum")) |
| verbose = 0; |
| else if (unformat (input, "mem") || unformat (input, "memory")) |
| memory = 1; |
| else if (unformat (input, "%U %U", |
| unformat_ip4_address, &src, |
| unformat_ip4_address, &grp)) |
| { |
| matching = 1; |
| mask = 64; |
| } |
| else if (unformat (input, "%U/%d", unformat_ip4_address, &grp, &mask)) |
| { |
| clib_memset(&src, 0, sizeof(src)); |
| matching = 1; |
| } |
| else if (unformat (input, "%U", unformat_ip4_address, &grp)) |
| { |
| clib_memset(&src, 0, sizeof(src)); |
| matching = 1; |
| mask = 32; |
| } |
| else if (unformat (input, "table %d", &table_id)) |
| ; |
| else if (unformat (input, "index %d", &fib_index)) |
| ; |
| else |
| break; |
| } |
| |
| pool_foreach (mfib_table, im4->mfibs) |
| { |
| ip4_mfib_t *mfib = &mfib_table->v4; |
| |
| if (table_id >= 0 && table_id != (int)mfib->table_id) |
| continue; |
| if (fib_index != ~0 && fib_index != (int)mfib->index) |
| continue; |
| |
| if (memory) |
| { |
| uword hash_size; |
| |
| hash_size = 0; |
| |
| for (i = 0; i < ARRAY_LEN (mfib->fib_entry_by_dst_address); i++) |
| { |
| uword * hash = mfib->fib_entry_by_dst_address[i]; |
| if (NULL != hash) |
| { |
| hash_size += hash_bytes(hash); |
| } |
| } |
| if (verbose) |
| vlib_cli_output (vm, "%U hash:%d", |
| format_mfib_table_name, mfib->index, |
| FIB_PROTOCOL_IP4, |
| hash_size); |
| total_hash_memory += hash_size; |
| continue; |
| } |
| |
| vlib_cli_output (vm, "%U, fib_index:%d flags:%U", |
| format_mfib_table_name, mfib->index, FIB_PROTOCOL_IP4, |
| mfib->index, |
| format_mfib_table_flags, mfib_table->mft_flags); |
| |
| /* Show summary? */ |
| if (! verbose) |
| { |
| vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count"); |
| for (i = 0; i < ARRAY_LEN (mfib->fib_entry_by_dst_address); i++) |
| { |
| uword * hash = mfib->fib_entry_by_dst_address[i]; |
| uword n_elts = hash_elts (hash); |
| if (n_elts > 0) |
| vlib_cli_output (vm, "%20d%16d", i, n_elts); |
| } |
| continue; |
| } |
| |
| if (!matching) |
| { |
| ip4_mfib_table_show_all(mfib, vm); |
| } |
| else |
| { |
| ip4_mfib_table_show_one(mfib, vm, &src, &grp, mask); |
| } |
| } |
| if (memory) |
| vlib_cli_output (vm, "totals: hash:%ld", total_hash_memory); |
| |
| return 0; |
| } |
| |
| /* clang-format off */ |
| /*? |
| * This command displays the IPv4 MulticasrFIB Tables (VRF Tables) and |
| * the route entries for each table. |
| * |
| * @note This command will run for a long time when the FIB tables are |
| * comprised of millions of entries. For those scenarios, consider displaying |
| * a single table or summary mode. |
| * |
| * @cliexpar |
| * Example of how to display all the IPv4 Multicast FIB tables: |
| * @cliexstart{show ip fib} |
| * ipv4-VRF:0, fib_index 0 |
| * (*, 0.0.0.0/0): flags:D, |
| * Interfaces: |
| * multicast-ip4-chain |
| * [@1]: dpo-drop ip4 |
| * (*, 232.1.1.1/32): |
| * Interfaces: |
| * test-eth1: Forward, |
| * test-eth2: Forward, |
| * test-eth0: Accept, |
| * multicast-ip4-chain |
| * [@2]: dpo-replicate: [index:1 buckets:2 to:[0:0]] |
| * [0] [@1]: ipv4-mcast: test-eth1: IP4: d0:d1:d2:d3:d4:01 -> 01:00:05:00:00:00 |
| * [1] [@1]: ipv4-mcast: test-eth2: IP4: d0:d1:d2:d3:d4:02 -> 01:00:05:00:00:00 |
| * |
| * @cliexend |
| * Example of how to display a summary of all IPv4 FIB tables: |
| * @cliexstart{show ip fib summary} |
| * ipv4-VRF:0, fib_index 0, flow hash: src dst sport dport proto |
| * Prefix length Count |
| * 0 1 |
| * 8 2 |
| * 32 4 |
| * ipv4-VRF:7, fib_index 1, flow hash: src dst sport dport proto |
| * Prefix length Count |
| * 0 1 |
| * 8 2 |
| * 24 2 |
| * 32 4 |
| * @cliexend |
| ?*/ |
| /* clang-format on */ |
| VLIB_CLI_COMMAND (ip4_show_mfib_command, static) = { |
| .path = "show ip mfib", |
| .short_help = "show ip mfib [summary] [table <table-id>] [index <fib-id>] [<grp-addr>[/<mask>]] [<grp-addr>] [<src-addr> <grp-addr>]", |
| .function = ip4_show_mfib, |
| }; |