/* * 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/vnet.h> #include <vnet/mfib/mfib_itf.h> #include <vnet/mfib/mfib_signal.h> #include <vnet/fib/fib_path.h> #include <vnet/ethernet/mac_address.h> mfib_itf_t *mfib_itf_pool; index_t mfib_itf_create (fib_node_index_t path_index, mfib_itf_flags_t mfi_flags) { mfib_itf_t *mfib_itf; pool_get_aligned(mfib_itf_pool, mfib_itf, CLIB_CACHE_LINE_BYTES); mfib_itf->mfi_sw_if_index = fib_path_get_resolving_interface(path_index); mfib_itf->mfi_si = INDEX_INVALID; /* * add the path index to the per-path hash */ mfib_itf->mfi_hash = hash_set(mfib_itf->mfi_hash, path_index, mfi_flags); /* * the combined flags from all the paths is from just the one contributor */ mfib_itf->mfi_flags = mfi_flags; return (mfib_itf - mfib_itf_pool); } static mfib_itf_flags_t mfib_itf_mk_flags (const mfib_itf_t *mfib_itf) { mfib_itf_flags_t combined_flags, flags; fib_node_index_t *path_index; combined_flags = MFIB_ITF_FLAG_NONE; hash_foreach(path_index, flags, mfib_itf->mfi_hash, { combined_flags |= flags; }); return (combined_flags); } int mfib_itf_update (mfib_itf_t *mfib_itf, fib_node_index_t path_index, mfib_itf_flags_t mfi_flags) { /* * add or remove the path index to the per-path hash */ if (MFIB_ITF_FLAG_NONE == mfi_flags) { hash_unset(mfib_itf->mfi_hash, path_index); } else { mfib_itf->mfi_hash = hash_set(mfib_itf->mfi_hash, path_index, mfi_flags); } /* * re-generate the combined flags from all the paths. */ mfib_itf->mfi_flags = mfib_itf_mk_flags(mfib_itf); /* * The interface can be removed if there are no more flags */ return (MFIB_ITF_FLAG_NONE == mfib_itf->mfi_flags); } static void mfib_itf_hash_flush (mfib_itf_t *mfi) { fib_node_index_t path_index, *path_indexp, *all = NULL; mfib_itf_flags_t flags; hash_foreach(path_index, flags, mfi->mfi_hash, { vec_add1(all, path_index); }); vec_foreach(path_indexp, all) { hash_unset(mfi->mfi_hash, *path_indexp); }; } static void mfib_itf_prefix4_to_mac (const mfib_prefix_t *pfx, mac_address_t *mac) { mac->bytes[0] = 0x01; mac->bytes[1] = 0x0; mac->bytes[2] = 0x5e; mac->bytes[3] = pfx->fp_grp_addr.ip4.as_u8[1] & 0x7f; mac->bytes[4] = pfx->fp_grp_addr.ip4.as_u8[2]; mac->bytes[5] = pfx->fp_grp_addr.ip4.as_u8[3]; } static void mfib_itf_prefix6_to_mac (const mfib_prefix_t *pfx, mac_address_t *mac) { mac->bytes[0] = 0x33; mac->bytes[1] = 0x33; mac->bytes[2] = pfx->fp_grp_addr.ip6.as_u8[12]; mac->bytes[3] = pfx->fp_grp_addr.ip6.as_u8[13]; mac->bytes[4] = pfx->fp_grp_addr.ip6.as_u8[14]; mac->bytes[5] = pfx->fp_grp_addr.ip6.as_u8[15]; } static void mfib_itf_prefix_to_mac (const mfib_prefix_t *pfx, mac_address_t *mac) { switch (pfx->fp_proto) { case FIB_PROTOCOL_IP4: mfib_itf_prefix4_to_mac(pfx, mac); break; case FIB_PROTOCOL_IP6: mfib_itf_prefix6_to_mac(pfx, mac); break; case FIB_PROTOCOL_MPLS: break; } } static void mfib_itf_mac_add_del (mfib_itf_t *itf, const mfib_prefix_t *pfx, int add) { vnet_sw_interface_t *si; vnet_main_t *vnm; mac_address_t mac; vnm = vnet_get_main(); mfib_itf_prefix_to_mac(pfx, &mac); si = vnet_get_sw_interface(vnm, itf->mfi_sw_if_index); vnet_hw_interface_add_del_mac_address (vnet_get_main(), si->hw_if_index, mac.bytes, add); } void mfib_itf_mac_add (mfib_itf_t *itf, const mfib_prefix_t *pfx) { mfib_itf_mac_add_del(itf, pfx, 1); } void mfib_itf_mac_del (mfib_itf_t *itf, const mfib_prefix_t *pfx) { mfib_itf_mac_add_del(itf, pfx, 0); } void mfib_itf_delete (mfib_itf_t *mfi) { mfib_itf_hash_flush(mfi); mfib_signal_remove_itf(mfi); pool_put(mfib_itf_pool, mfi); } u8 * format_mfib_itf (u8 * s, va_list * args) { mfib_itf_t *mfib_itf; vnet_main_t *vnm; index_t mfi; mfi = va_arg (*args, index_t); vnm = vnet_get_main(); mfib_itf = mfib_itf_get(mfi); if (~0 != mfib_itf->mfi_sw_if_index) { return (format(s, " %U: %U", format_vnet_sw_interface_name, vnm, vnet_get_sw_interface(vnm, mfib_itf->mfi_sw_if_index), format_mfib_itf_flags, mfib_itf->mfi_flags)); } else { return (format(s, " local: %U", format_mfib_itf_flags, mfib_itf->mfi_flags)); } return (s); } static clib_error_t * show_mfib_itf_command (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { index_t mfii; if (unformat (input, "%d", &mfii)) { /* * show one in detail */ if (!pool_is_free_index(mfib_itf_pool, mfii)) { vlib_cli_output (vm, "%d@%U", mfii, format_mfib_itf, mfii); } else { vlib_cli_output (vm, "itf %d invalid", mfii); } } else { /* * show all */ vlib_cli_output (vm, "mFIB interfaces::"); pool_foreach_index (mfii, mfib_itf_pool) { vlib_cli_output (vm, "%d@%U", mfii, format_mfib_itf, mfii); } } return (NULL); } /*? * This commnad displays an MFIB interface, or all interfaces, indexed by their unique * numerical indentifier. ?*/ VLIB_CLI_COMMAND (show_mfib_itf, static) = { .path = "show mfib interface", .function = show_mfib_itf_command, .short_help = "show mfib interface", };