diff options
Diffstat (limited to 'src/vnet/ip/ip6_ll_table.c')
| -rw-r--r-- | src/vnet/ip/ip6_ll_table.c | 372 |
1 files changed, 372 insertions, 0 deletions
diff --git a/src/vnet/ip/ip6_ll_table.c b/src/vnet/ip/ip6_ll_table.c new file mode 100644 index 00000000000..67d05ed390f --- /dev/null +++ b/src/vnet/ip/ip6_ll_table.c @@ -0,0 +1,372 @@ +/* + * Copyright (c) 2018 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/dpo/drop_dpo.h> +#include <vnet/fib/ip6_fib.h> + +#include <vnet/ip/ip6_ll_table.h> + +/** + * There's only one IP6 link local table + */ +static ip6_ll_table_t ip6_ll_table; + +u32 +ip6_ll_fib_get (u32 sw_if_index) +{ + ASSERT (vec_len (ip6_ll_table.ilt_fibs) > sw_if_index); + + return (ip6_ll_table.ilt_fibs[sw_if_index]); +} + +fib_node_index_t +ip6_ll_table_lookup (const ip6_ll_prefix_t * prefix) +{ + return (ip6_fib_table_lookup (ip6_ll_fib_get (prefix->ilp_sw_if_index), + &prefix->ilp_addr, 128)); +} + +fib_node_index_t +ip6_ll_table_lookup_exact_match (const ip6_ll_prefix_t * prefix) +{ + return (ip6_fib_table_lookup_exact_match + (ip6_ll_fib_get (prefix->ilp_sw_if_index), &prefix->ilp_addr, 128)); +} + +static void +ip6_ll_fib_create (u32 sw_if_index) +{ + vnet_main_t *vnm = vnet_get_main (); + u8 *desc; + + desc = format (NULL, "IP6-link-local:%U", + format_vnet_sw_interface_name, + vnm, vnet_get_sw_interface (vnm, sw_if_index)); + + ip6_ll_table.ilt_fibs[sw_if_index] = + ip6_fib_table_create_and_lock (FIB_SOURCE_IP6_ND, + FIB_TABLE_FLAG_IP6_LL, desc); + + /* + * leave the default route as a drop, but fix fe::/10 to be a glean + * via the interface. + */ + /* *INDENT-OFF* */ + fib_prefix_t pfx = { + .fp_proto = FIB_PROTOCOL_IP6, + .fp_len = 10, + .fp_addr = { + .ip6 = { + .as_u8 = { + [0] = 0xFE, + [1] = 0x80, + } + }, + } + }; + fib_table_entry_update_one_path( + ip6_ll_table.ilt_fibs[sw_if_index], + &pfx, + FIB_SOURCE_SPECIAL, + (FIB_ENTRY_FLAG_ATTACHED | + FIB_ENTRY_FLAG_NO_ATTACHED_EXPORT), + DPO_PROTO_IP6, + NULL, + sw_if_index, + ~0, + 1, + NULL, + FIB_ROUTE_PATH_FLAG_NONE); + /* *INDENT-ON* */ +} + +static void +ip6_ll_prefix_to_fib (const ip6_ll_prefix_t * ilp, fib_prefix_t * fp) +{ + fp->fp_proto = FIB_PROTOCOL_IP6; + fp->fp_len = 128; + fp->fp_addr.ip6 = ilp->ilp_addr; +} + +fib_node_index_t +ip6_ll_table_entry_update (const ip6_ll_prefix_t * ilp, + fib_route_path_flags_t flags) +{ + fib_node_index_t ip6_ll_entry_index; + fib_route_path_t *rpaths, rpath = { + .frp_flags = flags, + .frp_sw_if_index = ilp->ilp_sw_if_index, + .frp_proto = DPO_PROTO_IP6, + }; + fib_prefix_t fp; + + vec_validate (ip6_ll_table.ilt_fibs, ilp->ilp_sw_if_index); + + if (0 == ip6_ll_fib_get (ilp->ilp_sw_if_index)) + { + ip6_ll_fib_create (ilp->ilp_sw_if_index); + } + + rpaths = NULL; + vec_add1 (rpaths, rpath); + + ip6_ll_prefix_to_fib (ilp, &fp); + ip6_ll_entry_index = + fib_table_entry_update (ip6_ll_fib_get (ilp->ilp_sw_if_index), &fp, + FIB_SOURCE_IP6_ND, + (flags & FIB_ROUTE_PATH_LOCAL ? + FIB_ENTRY_FLAG_LOCAL : FIB_ENTRY_FLAG_NONE), + rpaths); + vec_free (rpaths); + + return (ip6_ll_entry_index); +} + +void +ip6_ll_table_entry_delete (const ip6_ll_prefix_t * ilp) +{ + fib_node_index_t ip6_ll_entry_index; + u32 fib_index; + + ip6_ll_entry_index = ip6_ll_table_lookup_exact_match (ilp); + + if (FIB_NODE_INDEX_INVALID != ip6_ll_entry_index) + fib_table_entry_delete_index (ip6_ll_entry_index, FIB_SOURCE_IP6_ND); + + /* + * if there are no ND sourced prefixes left, then we can clean up this FIB + */ + fib_index = ip6_ll_fib_get (ilp->ilp_sw_if_index); + if (0 == fib_table_get_num_entries (fib_index, + FIB_PROTOCOL_IP6, FIB_SOURCE_IP6_ND)) + { + fib_table_unlock (fib_index, FIB_PROTOCOL_IP6, FIB_SOURCE_IP6_ND); + ip6_ll_table.ilt_fibs[ilp->ilp_sw_if_index] = 0; + } +} + +static void +ip6_ll_table_show_one (vlib_main_t * vm, ip6_ll_prefix_t * ilp, int detail) +{ + vlib_cli_output (vm, "%U", + format_fib_entry, + ip6_ll_table_lookup (ilp), + (detail ? + FIB_ENTRY_FORMAT_DETAIL2 : FIB_ENTRY_FORMAT_DETAIL)); +} + +typedef struct ip6_ll_show_ctx_t_ +{ + fib_node_index_t *entries; +} ip6_ll_show_ctx_t; + +static fib_table_walk_rc_t +ip6_ll_table_show_walk (fib_node_index_t fib_entry_index, void *arg) +{ + ip6_ll_show_ctx_t *ctx = arg; + + vec_add1 (ctx->entries, fib_entry_index); + + return (FIB_TABLE_WALK_CONTINUE); +} + +static void +ip6_ll_table_show_all (vlib_main_t * vm, u32 fib_index) +{ + fib_node_index_t *fib_entry_index; + ip6_ll_show_ctx_t ctx = { + .entries = NULL, + }; + + fib_table_walk (fib_index, FIB_PROTOCOL_IP6, ip6_ll_table_show_walk, &ctx); + vec_sort_with_function (ctx.entries, fib_entry_cmp_for_sort); + + vec_foreach (fib_entry_index, ctx.entries) + { + vlib_cli_output (vm, "%U", + format_fib_entry, + *fib_entry_index, FIB_ENTRY_FORMAT_BRIEF); + } + + vec_free (ctx.entries); +} + +typedef struct +{ + u32 fib_index; + u64 count_by_prefix_length[129]; +} count_routes_in_fib_at_prefix_length_arg_t; + +static void +count_routes_in_fib_at_prefix_length (BVT (clib_bihash_kv) * kvp, void *arg) +{ + count_routes_in_fib_at_prefix_length_arg_t *ap = arg; + int mask_width; + + if ((kvp->key[2] >> 32) != ap->fib_index) + return; + + mask_width = kvp->key[2] & 0xFF; + + ap->count_by_prefix_length[mask_width]++; +} + +static clib_error_t * +ip6_ll_show_fib (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd) +{ + count_routes_in_fib_at_prefix_length_arg_t _ca, *ca = &_ca; + ip6_main_t *im6 = &ip6_main; + fib_table_t *fib_table; + int verbose, matching; + ip6_address_t matching_address; + u32 mask_len = 128; + u32 sw_if_index = ~0; + int detail = 0; + vnet_main_t *vnm = vnet_get_main (); + u32 fib_index; + + 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, "detail") || unformat (input, "det")) + detail = 1; + + else if (unformat (input, "%U/%d", + unformat_ip6_address, &matching_address, &mask_len)) + matching = 1; + + else + if (unformat (input, "%U", unformat_ip6_address, &matching_address)) + matching = 1; + else if (unformat (input, "%U", + unformat_vnet_sw_interface, vnm, &sw_if_index)) + ; + else + break; + } + + vec_foreach_index (sw_if_index, ip6_ll_table.ilt_fibs) + { + fib_source_t source; + u8 *s = NULL; + + fib_index = ip6_ll_table.ilt_fibs[sw_if_index]; + + if (0 == fib_index) + continue; + + fib_table = fib_table_get (fib_index, FIB_PROTOCOL_IP6); + + if (!(fib_table->ft_flags & FIB_TABLE_FLAG_IP6_LL)) + continue; + + s = format (s, "%U, fib_index:%d, locks:[", + format_fib_table_name, fib_index, + FIB_PROTOCOL_IP6, fib_index); + FOR_EACH_FIB_SOURCE (source) + { + if (0 != fib_table->ft_locks[source]) + { + s = format (s, "%U:%d, ", + format_fib_source, source, fib_table->ft_locks[source]); + } + } + s = format (s, "]"); + vlib_cli_output (vm, "%v", s); + vec_free (s); + + /* Show summary? */ + if (!verbose) + { + BVT (clib_bihash) * h = + &im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash; + int len; + + vlib_cli_output (vm, "%=20s%=16s", "Prefix length", "Count"); + + memset (ca, 0, sizeof (*ca)); + ca->fib_index = fib_index; + + BV (clib_bihash_foreach_key_value_pair) + (h, count_routes_in_fib_at_prefix_length, ca); + + for (len = 128; len >= 0; len--) + { + if (ca->count_by_prefix_length[len]) + vlib_cli_output (vm, "%=20d%=16lld", + len, ca->count_by_prefix_length[len]); + } + continue; + } + + if (!matching) + { + ip6_ll_table_show_all (vm, fib_index); + } + else + { + if (~0 == sw_if_index) + { + vlib_cli_output (vm, "specify the interface"); + } + else + { + ip6_ll_prefix_t ilp = { + .ilp_addr = matching_address, + .ilp_sw_if_index = sw_if_index, + }; + ip6_ll_table_show_one (vm, &ilp, detail); + } + } + }; + + return 0; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (ip6_show_fib_command, static) = { + .path = "show ip6-ll", + .short_help = "show ip6-ll [summary] [interface] [<ip6-addr>[/<width>]] [detail]", + .function = ip6_ll_show_fib, +}; +/* *INDENT-ON* */ + +static clib_error_t * +ip6_ll_module_init (vlib_main_t * vm) +{ + clib_error_t *error; + + error = vlib_call_init_function (vm, ip6_lookup_init); + + return (error); +} + +VLIB_INIT_FUNCTION (ip6_ll_module_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |