| /* |
| * 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/ip6_mfib.h> |
| |
| #include <vnet/mfib/mfib_table.h> |
| #include <vnet/mfib/mfib_entry.h> |
| #include <vnet/fib/ip6_fib.h> |
| |
| /** |
| * The number of bytes in an address/ask key in the radix tree |
| * First byte is the length in bytes. |
| */ |
| #define IP6_MFIB_KEY_LEN 33 |
| |
| /** |
| * Key and mask for radix |
| */ |
| typedef struct ip6_mfib_key_t_ |
| { |
| u8 key[IP6_MFIB_KEY_LEN]; |
| u8 mask[IP6_MFIB_KEY_LEN]; |
| } ip6_mfib_key_t; |
| |
| /** |
| * An object that is inserted into the radix tree. |
| * Since it's in the tree and has pointers, it cannot realloc and so cannot |
| * come from a vlib pool. |
| */ |
| typedef struct ip6_mfib_node_t_ |
| { |
| struct radix_node i6mn_nodes[2]; |
| ip6_mfib_key_t i6mn_key; |
| index_t i6mn_entry; |
| } ip6_mfib_node_t; |
| |
| static const mfib_prefix_t all_zeros = { |
| /* (*,*) */ |
| .fp_src_addr = { |
| .ip6.as_u64 = {0, 0}, |
| }, |
| .fp_grp_addr = { |
| .ip6.as_u64 = {0, 0}, |
| }, |
| .fp_len = 0, |
| .fp_proto = FIB_PROTOCOL_IP6, |
| }; |
| |
| typedef enum ip6_mfib_special_type_t_ { |
| IP6_MFIB_SPECIAL_TYPE_NONE, |
| IP6_MFIB_SPECIAL_TYPE_SOLICITED, |
| } ip6_mfib_special_type_t; |
| |
| typedef struct ip6_mfib_special_t_ { |
| /** |
| * @brief solicited or not |
| */ |
| ip6_mfib_special_type_t ims_type; |
| |
| /** |
| * @brief the Prefix length |
| */ |
| u8 ims_len; |
| |
| /** |
| * @brief The last byte of the mcast address |
| */ |
| u8 ims_byte; |
| /** |
| * @brief The scope of the address |
| */ |
| u8 ims_scope; |
| } ip6_mfib_special_t; |
| |
| static const ip6_mfib_special_t ip6_mfib_specials[] = |
| { |
| { |
| /* |
| * Add ff02::1:ff00:0/104 via local route for all tables. |
| * This is required for neighbor discovery to work. |
| */ |
| .ims_type = IP6_MFIB_SPECIAL_TYPE_SOLICITED, |
| .ims_len = 104, |
| }, |
| { |
| /* |
| * all-routers multicast address |
| */ |
| .ims_type = IP6_MFIB_SPECIAL_TYPE_NONE, |
| .ims_scope = IP6_MULTICAST_SCOPE_link_local, |
| .ims_byte = IP6_MULTICAST_GROUP_ID_all_routers, |
| .ims_len = 128, |
| }, |
| { |
| /* |
| * all-nodes multicast address |
| */ |
| .ims_type = IP6_MFIB_SPECIAL_TYPE_NONE, |
| .ims_scope = IP6_MULTICAST_SCOPE_link_local, |
| .ims_byte = IP6_MULTICAST_GROUP_ID_all_hosts, |
| .ims_len = 128, |
| }, |
| { |
| /* |
| * Add all-mldv2 multicast address via local route for all tables |
| */ |
| .ims_type = IP6_MFIB_SPECIAL_TYPE_NONE, |
| .ims_len = 128, |
| .ims_scope = IP6_MULTICAST_SCOPE_link_local, |
| .ims_byte = IP6_MULTICAST_GROUP_ID_mldv2_routers, |
| } |
| }; |
| |
| #define FOR_EACH_IP6_SPECIAL(_pfx, _body) \ |
| { \ |
| const ip6_mfib_special_t *_spec; \ |
| u8 _ii; \ |
| for (_ii = 0; \ |
| _ii < ARRAY_LEN(ip6_mfib_specials); \ |
| _ii++) \ |
| { \ |
| _spec = &ip6_mfib_specials[_ii]; \ |
| if (IP6_MFIB_SPECIAL_TYPE_SOLICITED == _spec->ims_type) \ |
| { \ |
| ip6_set_solicited_node_multicast_address( \ |
| &(_pfx)->fp_grp_addr.ip6, 0); \ |
| } \ |
| else \ |
| { \ |
| ip6_set_reserved_multicast_address ( \ |
| &(_pfx)->fp_grp_addr.ip6, \ |
| _spec->ims_scope, \ |
| _spec->ims_byte); \ |
| } \ |
| (_pfx)->fp_len = _spec->ims_len; \ |
| do { _body; } while (0); \ |
| } \ |
| } |
| |
| |
| static u32 |
| ip6_create_mfib_with_table_id (u32 table_id) |
| { |
| mfib_table_t *mfib_table; |
| mfib_prefix_t pfx = { |
| .fp_proto = FIB_PROTOCOL_IP6, |
| }; |
| const fib_route_path_t path_for_us = { |
| .frp_proto = FIB_PROTOCOL_IP6, |
| .frp_addr = zero_addr, |
| .frp_sw_if_index = 0xffffffff, |
| .frp_fib_index = ~0, |
| .frp_weight = 0, |
| .frp_flags = FIB_ROUTE_PATH_LOCAL, |
| }; |
| |
| pool_get_aligned(ip6_main.mfibs, mfib_table, CLIB_CACHE_LINE_BYTES); |
| memset(mfib_table, 0, sizeof(*mfib_table)); |
| |
| mfib_table->mft_proto = FIB_PROTOCOL_IP6; |
| mfib_table->mft_index = |
| mfib_table->v6.index = |
| (mfib_table - ip6_main.mfibs); |
| |
| hash_set (ip6_main.mfib_index_by_table_id, |
| table_id, |
| mfib_table->mft_index); |
| |
| mfib_table->mft_table_id = |
| mfib_table->v6.table_id = |
| table_id; |
| |
| mfib_table_lock(mfib_table->mft_index, FIB_PROTOCOL_IP6); |
| |
| mfib_table->v6.rhead = |
| clib_mem_alloc_aligned (sizeof(*mfib_table->v6.rhead), |
| CLIB_CACHE_LINE_BYTES); |
| rn_inithead0(mfib_table->v6.rhead, 8); |
| |
| /* |
| * add the special entries into the new FIB |
| */ |
| mfib_table_entry_update(mfib_table->mft_index, |
| &all_zeros, |
| MFIB_SOURCE_DEFAULT_ROUTE, |
| MFIB_ENTRY_FLAG_DROP); |
| |
| /* |
| * Add each of the specials |
| */ |
| FOR_EACH_IP6_SPECIAL(&pfx, |
| ({ |
| mfib_table_entry_path_update(mfib_table->mft_index, |
| &pfx, |
| MFIB_SOURCE_SPECIAL, |
| &path_for_us, |
| MFIB_ITF_FLAG_FORWARD); |
| })); |
| |
| return (mfib_table->mft_index); |
| } |
| |
| void |
| ip6_mfib_table_destroy (ip6_mfib_t *mfib) |
| { |
| mfib_table_t *mfib_table = (mfib_table_t*)mfib; |
| fib_node_index_t mfei; |
| mfib_prefix_t pfx = { |
| .fp_proto = FIB_PROTOCOL_IP6, |
| }; |
| const fib_route_path_t path_for_us = { |
| .frp_proto = FIB_PROTOCOL_IP6, |
| .frp_addr = zero_addr, |
| .frp_sw_if_index = 0xffffffff, |
| .frp_fib_index = ~0, |
| .frp_weight = 0, |
| .frp_flags = FIB_ROUTE_PATH_LOCAL, |
| }; |
| |
| /* |
| * remove all the specials we added when the table was created. |
| */ |
| FOR_EACH_IP6_SPECIAL(&pfx, |
| { |
| mfib_table_entry_path_remove(mfib_table->mft_index, |
| &pfx, |
| MFIB_SOURCE_SPECIAL, |
| &path_for_us); |
| }); |
| |
| mfei = mfib_table_lookup_exact_match(mfib_table->mft_index, &all_zeros); |
| mfib_table_entry_delete_index(mfei, MFIB_SOURCE_DEFAULT_ROUTE); |
| |
| /* |
| * validate no more routes. |
| */ |
| ASSERT(0 == mfib_table->mft_total_route_counts); |
| ASSERT(~0 != mfib_table->mft_table_id); |
| |
| hash_unset (ip6_main.mfib_index_by_table_id, mfib_table->mft_table_id); |
| clib_mem_free(mfib_table->v6.rhead); |
| pool_put(ip6_main.mfibs, mfib_table); |
| } |
| |
| void |
| ip6_mfib_interface_enable_disable (u32 sw_if_index, int is_enable) |
| { |
| const fib_route_path_t path = { |
| .frp_proto = FIB_PROTOCOL_IP6, |
| .frp_addr = zero_addr, |
| .frp_sw_if_index = sw_if_index, |
| .frp_fib_index = ~0, |
| .frp_weight = 0, |
| }; |
| mfib_prefix_t pfx = { |
| .fp_proto = FIB_PROTOCOL_IP6, |
| }; |
| u32 mfib_index; |
| |
| vec_validate (ip6_main.mfib_index_by_sw_if_index, sw_if_index); |
| mfib_index = ip6_mfib_table_get_index_for_sw_if_index(sw_if_index); |
| |
| if (is_enable) |
| { |
| FOR_EACH_IP6_SPECIAL(&pfx, |
| { |
| mfib_table_entry_path_update(mfib_index, |
| &pfx, |
| MFIB_SOURCE_SPECIAL, |
| &path, |
| MFIB_ITF_FLAG_ACCEPT); |
| }); |
| } |
| else |
| { |
| FOR_EACH_IP6_SPECIAL(&pfx, |
| { |
| mfib_table_entry_path_remove(mfib_index, |
| &pfx, |
| MFIB_SOURCE_SPECIAL, |
| &path); |
| }); |
| } |
| } |
| |
| u32 |
| ip6_mfib_table_find_or_create_and_lock (u32 table_id) |
| { |
| u32 index; |
| |
| index = ip6_mfib_index_from_table_id(table_id); |
| if (~0 == index) |
| return ip6_create_mfib_with_table_id(table_id); |
| mfib_table_lock(index, FIB_PROTOCOL_IP6); |
| |
| return (index); |
| } |
| |
| u32 |
| ip6_mfib_table_get_index_for_sw_if_index (u32 sw_if_index) |
| { |
| if (sw_if_index >= vec_len(ip6_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 (ip6_main.mfib_index_by_sw_if_index[sw_if_index]); |
| } |
| |
| #define IP6_MFIB_MK_KEY(_grp, _src, _key) \ |
| { \ |
| (_key)->key[0] = 33; \ |
| memcpy((_key)->key+1, _grp, 16); \ |
| memcpy((_key)->key+17, _src, 16); \ |
| } |
| |
| #define IP6_MFIB_MK_KEY_MASK(_grp, _src, _len, _key) \ |
| { \ |
| IP6_MFIB_MK_KEY(_grp, _src, _key); \ |
| \ |
| (_key)->mask[0] = 33; \ |
| if (_len <= 128) \ |
| { \ |
| memcpy((_key)->mask+1, &ip6_main.fib_masks[_len], 16); \ |
| memset((_key)->mask+17, 0, 16); \ |
| } \ |
| else \ |
| { \ |
| ASSERT(_len == 256); \ |
| memcpy((_key)->mask+1, &ip6_main.fib_masks[128], 16); \ |
| memcpy((_key)->mask+17, &ip6_main.fib_masks[128], 16); \ |
| } \ |
| } |
| |
| /* |
| * ip6_fib_table_lookup_exact_match |
| * |
| * Exact match prefix lookup |
| */ |
| fib_node_index_t |
| ip6_mfib_table_lookup_exact_match (const ip6_mfib_t *mfib, |
| const ip6_address_t *grp, |
| const ip6_address_t *src, |
| u32 len) |
| { |
| ip6_mfib_node_t *i6mn; |
| ip6_mfib_key_t key; |
| |
| IP6_MFIB_MK_KEY_MASK(grp, src, len, &key); |
| |
| i6mn = (ip6_mfib_node_t*) rn_lookup(key.key, key.mask, |
| (struct radix_node_head *)mfib->rhead); |
| |
| if (NULL == i6mn) |
| { |
| return (INDEX_INVALID); |
| } |
| |
| return (i6mn->i6mn_entry); |
| } |
| |
| /* |
| * ip6_fib_table_lookup |
| * |
| * Longest prefix match |
| */ |
| fib_node_index_t |
| ip6_mfib_table_lookup (const ip6_mfib_t *mfib, |
| const ip6_address_t *src, |
| const ip6_address_t *grp, |
| u32 len) |
| { |
| ip6_mfib_node_t *i6mn; |
| ip6_mfib_key_t key; |
| |
| IP6_MFIB_MK_KEY_MASK(grp, src, len, &key); |
| |
| i6mn = (ip6_mfib_node_t*) rn_search_m(key.key, |
| mfib->rhead->rnh_treetop, |
| key.mask); |
| |
| ASSERT(NULL != i6mn); |
| |
| return (i6mn->i6mn_entry); |
| } |
| |
| /* |
| * ip6_fib_table_lookup |
| * |
| * Longest prefix match no mask |
| */ |
| fib_node_index_t |
| ip6_mfib_table_lookup2 (const ip6_mfib_t *mfib, |
| const ip6_address_t *src, |
| const ip6_address_t *grp) |
| { |
| ip6_mfib_node_t *i6mn; |
| ip6_mfib_key_t key; |
| |
| IP6_MFIB_MK_KEY(grp, src, &key); |
| |
| i6mn = (ip6_mfib_node_t*) rn_match(key.key, |
| (struct radix_node_head *)mfib->rhead); // const cast |
| |
| ASSERT(NULL != i6mn); |
| |
| return (i6mn->i6mn_entry); |
| } |
| |
| void |
| ip6_mfib_table_entry_insert (ip6_mfib_t *mfib, |
| const ip6_address_t *grp, |
| const ip6_address_t *src, |
| u32 len, |
| fib_node_index_t mfib_entry_index) |
| { |
| ip6_mfib_node_t *i6mn = clib_mem_alloc(sizeof(*i6mn)); |
| |
| memset(i6mn, 0, sizeof(*i6mn)); |
| |
| IP6_MFIB_MK_KEY_MASK(grp, src, len, &i6mn->i6mn_key); |
| i6mn->i6mn_entry = mfib_entry_index; |
| |
| if (NULL == rn_addroute(i6mn->i6mn_key.key, |
| i6mn->i6mn_key.mask, |
| mfib->rhead, |
| i6mn->i6mn_nodes)) |
| { |
| ASSERT(0); |
| } |
| } |
| |
| void |
| ip6_mfib_table_entry_remove (ip6_mfib_t *mfib, |
| const ip6_address_t *grp, |
| const ip6_address_t *src, |
| u32 len) |
| { |
| ip6_mfib_node_t *i6mn; |
| ip6_mfib_key_t key; |
| |
| IP6_MFIB_MK_KEY_MASK(grp, src, len, &key); |
| |
| i6mn = (ip6_mfib_node_t*) rn_delete(key.key, key.mask, mfib->rhead); |
| |
| clib_mem_free(i6mn); |
| } |
| |
| static clib_error_t * |
| ip6_mfib_module_init (vlib_main_t * vm) |
| { |
| return (NULL); |
| } |
| |
| VLIB_INIT_FUNCTION(ip6_mfib_module_init); |
| |
| static void |
| ip6_mfib_table_show_one (ip6_mfib_t *mfib, |
| vlib_main_t * vm, |
| ip6_address_t *src, |
| ip6_address_t *grp, |
| u32 mask_len) |
| { |
| vlib_cli_output(vm, "%U", |
| format_mfib_entry, |
| ip6_mfib_table_lookup(mfib, src, grp, mask_len), |
| MFIB_ENTRY_FORMAT_DETAIL); |
| } |
| |
| typedef struct ip6_mfib_show_ctx_t_ { |
| u32 fib_index; |
| fib_node_index_t *entries; |
| } ip6_mfib_show_ctx_t; |
| |
| |
| static int |
| ip6_mfib_table_collect_entries (struct radix_node *rn, void *arg) |
| { |
| ip6_mfib_show_ctx_t *ctx = arg; |
| ip6_mfib_node_t *i6mn; |
| |
| i6mn = (ip6_mfib_node_t*) rn; |
| |
| vec_add1(ctx->entries, i6mn->i6mn_entry); |
| |
| return (0); |
| } |
| |
| static void |
| ip6_mfib_table_show_all (ip6_mfib_t *mfib, |
| vlib_main_t * vm) |
| { |
| fib_node_index_t *mfib_entry_index; |
| ip6_mfib_show_ctx_t ctx = { |
| .fib_index = mfib->index, |
| .entries = NULL, |
| }; |
| |
| rn_walktree(mfib->rhead, |
| ip6_mfib_table_collect_entries, |
| &ctx); |
| |
| vec_sort_with_function(ctx.entries, mfib_entry_cmp_for_sort); |
| |
| vec_foreach(mfib_entry_index, ctx.entries) |
| { |
| vlib_cli_output(vm, "%U", |
| format_mfib_entry, |
| *mfib_entry_index, |
| MFIB_ENTRY_FORMAT_BRIEF); |
| } |
| |
| vec_free(ctx.entries); |
| } |
| |
| static clib_error_t * |
| ip6_show_mfib (vlib_main_t * vm, |
| unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| ip6_main_t * im4 = &ip6_main; |
| mfib_table_t *mfib_table; |
| int verbose, matching; |
| ip6_address_t grp, src = {{0}}; |
| u32 mask = 32; |
| int table_id = -1, fib_index = ~0; |
| |
| verbose = 1; |
| matching = 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, "%U %U", |
| unformat_ip6_address, &src, |
| unformat_ip6_address, &grp)) |
| { |
| matching = 1; |
| mask = 64; |
| } |
| else if (unformat (input, "%U", unformat_ip6_address, &grp)) |
| { |
| matching = 1; |
| mask = 32; |
| } |
| else if (unformat (input, "%U/%d", |
| unformat_ip6_address, &grp, &mask)) |
| matching = 1; |
| else if (unformat (input, "table %d", &table_id)) |
| ; |
| else if (unformat (input, "index %d", &fib_index)) |
| ; |
| else |
| break; |
| } |
| |
| pool_foreach (mfib_table, im4->mfibs, |
| ({ |
| ip6_mfib_t *mfib = &mfib_table->v6; |
| |
| if (table_id >= 0 && table_id != (int)mfib->table_id) |
| continue; |
| if (fib_index != ~0 && fib_index != (int)mfib->index) |
| continue; |
| |
| vlib_cli_output (vm, "%U, fib_index %d", |
| format_mfib_table_name, mfib->index, FIB_PROTOCOL_IP6, |
| mfib->index); |
| |
| /* 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) |
| { |
| ip6_mfib_table_show_all(mfib, vm); |
| } |
| else |
| { |
| ip6_mfib_table_show_one(mfib, vm, &src, &grp, mask); |
| } |
| })); |
| |
| return 0; |
| } |
| |
| /* |
| * 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 senarios, 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-ip6-chain |
| * [@1]: dpo-drop ip6 |
| * (*, 232.1.1.1/32): |
| * Interfaces: |
| * test-eth1: Forward, |
| * test-eth2: Forward, |
| * test-eth0: Accept, |
| * multicast-ip6-chain |
| * [@2]: dpo-replicate: [index:1 buckets:2 to:[0:0]] |
| * [0] [@1]: ipv4-mcast: test-eth1: IP6: d0:d1:d2:d3:d4:01 -> 01:00:05:00:00:00 |
| * [1] [@1]: ipv4-mcast: test-eth2: IP6: 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 |
| */ |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (ip6_show_fib_command, static) = { |
| .path = "show ip6 mfib", |
| .short_help = "show ip mfib [summary] [table <table-id>] [index <fib-id>] [<grp-addr>[/<mask>]] [<grp-addr>] [<src-addr> <grp-addr>]", |
| .function = ip6_show_mfib, |
| }; |
| /* *INDENT-ON* */ |