/* * interface.c: mpls interfaces * * Copyright (c) 2012 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/pg/pg.h> #include <vnet/mpls/mpls.h> #include <vnet/fib/mpls_fib.h> #include <vnet/fib/ip4_fib.h> #include <vnet/adj/adj_midchain.h> #include <vnet/dpo/classify_dpo.h> u8 mpls_sw_interface_is_enabled (u32 sw_if_index) { mpls_main_t * mm = &mpls_main; if (vec_len(mm->mpls_enabled_by_sw_if_index) <= sw_if_index) return (0); return (mm->mpls_enabled_by_sw_if_index[sw_if_index]); } int mpls_sw_interface_enable_disable (mpls_main_t * mm, u32 sw_if_index, u8 is_enable, u8 is_api) { fib_node_index_t lfib_index; vnet_main_t *vnm = vnet_get_main (); vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index); vec_validate_init_empty (mm->mpls_enabled_by_sw_if_index, sw_if_index, 0); lfib_index = fib_table_find(FIB_PROTOCOL_MPLS, MPLS_FIB_DEFAULT_TABLE_ID); if (~0 == lfib_index) return VNET_API_ERROR_NO_SUCH_FIB; /* * enable/disable only on the 1<->0 transition */ if (is_enable) { if (1 != ++mm->mpls_enabled_by_sw_if_index[sw_if_index]) return (0); fib_table_lock(lfib_index, FIB_PROTOCOL_MPLS, (is_api? FIB_SOURCE_API: FIB_SOURCE_CLI)); vec_validate(mm->fib_index_by_sw_if_index, sw_if_index); mm->fib_index_by_sw_if_index[sw_if_index] = lfib_index; } else { ASSERT(mm->mpls_enabled_by_sw_if_index[sw_if_index] > 0); if (0 != --mm->mpls_enabled_by_sw_if_index[sw_if_index]) return (0); fib_table_unlock(mm->fib_index_by_sw_if_index[sw_if_index], FIB_PROTOCOL_MPLS, (is_api? FIB_SOURCE_API: FIB_SOURCE_CLI)); } vnet_feature_enable_disable ("mpls-input", "mpls-not-enabled", sw_if_index, !is_enable, 0, 0); if (is_enable) hi->l3_if_count++; else if (hi->l3_if_count) hi->l3_if_count--; return (0); } static clib_error_t * mpls_interface_enable_disable (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vnet_main_t * vnm = vnet_get_main(); clib_error_t * error = 0; u32 sw_if_index, enable; int rv; sw_if_index = ~0; if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) { error = clib_error_return (0, "unknown interface `%U'", format_unformat_error, input); goto done; } if (unformat (input, "enable")) enable = 1; else if (unformat (input, "disable")) enable = 0; else { error = clib_error_return (0, "expected 'enable' or 'disable'", format_unformat_error, input); goto done; } rv = mpls_sw_interface_enable_disable(&mpls_main, sw_if_index, enable, 0); if (VNET_API_ERROR_NO_SUCH_FIB == rv) error = clib_error_return (0, "default MPLS table must be created first"); done: return error; } /*? * This command enables an interface to accpet MPLS packets * * @cliexpar * @cliexstart{set interface mpls} * set interface mpls GigEthernet0/8/0 enable * @cliexend ?*/ VLIB_CLI_COMMAND (set_interface_ip_table_command, static) = { .path = "set interface mpls", .function = mpls_interface_enable_disable, .short_help = "Enable/Disable an interface for MPLS forwarding", };