/* * 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/cop/cop.h> cop_main_t cop_main; static clib_error_t * cop_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add) { cop_main_t * cm = &cop_main; cop_config_data_t _data, *data = &_data; vlib_main_t * vm = cm->vlib_main; vnet_hw_interface_t * hi = vnet_get_sup_hw_interface (vnm, sw_if_index);; cop_config_main_t * ccm; int address_family; u32 ci, default_next; memset (data, 0, sizeof(*data)); /* * Ignore local interface, pg interfaces. $$$ need a #define for the * first "real" interface. The answer is 5 at the moment. */ if (hi->dev_class_index == vnet_local_interface_device_class.index) return 0; for (address_family = VNET_COP_IP4; address_family < VNET_N_COPS; address_family++) { ccm = &cm->cop_config_mains[address_family]; /* * Once-only code to initialize the per-address-family * cop feature subgraphs. * Since the (single) start-node, cop-input, must be able * to push pkts into three separate subgraphs, we * use a unified cop_feature_type_t enumeration. */ if (!(ccm->config_main.node_index_by_feature_index)) { switch (address_family) { case VNET_COP_IP4: { static char * start_nodes[] = { "cop-input" }; static char * feature_nodes[] = { [IP4_RX_COP_WHITELIST] = "ip4-cop-whitelist", [IP4_RX_COP_INPUT] = "ip4-input", }; vnet_config_init (vm, &ccm->config_main, start_nodes, ARRAY_LEN(start_nodes), feature_nodes, ARRAY_LEN(feature_nodes)); } break; case VNET_COP_IP6: { static char * start_nodes[] = { "cop-input" }; static char * feature_nodes[] = { [IP6_RX_COP_WHITELIST] = "ip6-cop-whitelist", [IP6_RX_COP_INPUT] = "ip6-input", }; vnet_config_init (vm, &ccm->config_main, start_nodes, ARRAY_LEN(start_nodes), feature_nodes, ARRAY_LEN(feature_nodes)); } break; case VNET_COP_DEFAULT: { static char * start_nodes[] = { "cop-input" }; static char * feature_nodes[] = { [DEFAULT_RX_COP_WHITELIST] = "default-cop-whitelist", [DEFAULT_RX_COP_INPUT] = "ethernet-input", }; vnet_config_init (vm, &ccm->config_main, start_nodes, ARRAY_LEN(start_nodes), feature_nodes, ARRAY_LEN(feature_nodes)); } break; default: clib_warning ("bug"); break; } } vec_validate_init_empty (ccm->config_index_by_sw_if_index, sw_if_index, ~0); ci = ccm->config_index_by_sw_if_index[sw_if_index]; /* Create a sensible initial config: send pkts to xxx-input */ if (address_family == VNET_COP_IP4) default_next = IP4_RX_COP_INPUT; else if (address_family == VNET_COP_IP6) default_next = IP6_RX_COP_INPUT; else default_next = DEFAULT_RX_COP_INPUT; if (is_add) ci = vnet_config_add_feature (vm, &ccm->config_main, ci, default_next, data, sizeof(*data)); else ci = vnet_config_del_feature (vm, &ccm->config_main, ci, default_next, data, sizeof(*data)); ccm->config_index_by_sw_if_index[sw_if_index] = ci; } return 0; } VNET_SW_INTERFACE_ADD_DEL_FUNCTION (cop_sw_interface_add_del); static clib_error_t * cop_init (vlib_main_t *vm) { cop_main_t * cm = &cop_main; clib_error_t * error; if ((error = vlib_call_init_function (vm, ip4_whitelist_init))) return error; if ((error = vlib_call_init_function (vm, ip6_whitelist_init))) return error; cm->vlib_main = vm; cm->vnet_main = vnet_get_main(); return 0; } VLIB_INIT_FUNCTION (cop_init); int cop_interface_enable_disable (u32 sw_if_index, int enable_disable) { cop_main_t * cm = &cop_main; vnet_sw_interface_t * sw; int rv; u32 node_index = enable_disable ? cop_input_node.index : ~0; /* Not a physical port? */ sw = vnet_get_sw_interface (cm->vnet_main, sw_if_index); if (sw->type != VNET_SW_INTERFACE_TYPE_HARDWARE) return VNET_API_ERROR_INVALID_SW_IF_INDEX; /* * Redirect pkts from the driver to the cop node. * Returns VNET_API_ERROR_UNIMPLEMENTED if the h/w driver * doesn't implement the API. * * Node_index = ~0 => shut off redirection */ rv = vnet_hw_interface_rx_redirect_to_node (cm->vnet_main, sw_if_index, node_index); return rv; } static clib_error_t * cop_enable_disable_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { cop_main_t * cm = &cop_main; u32 sw_if_index = ~0; int enable_disable = 1; int rv; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "disable")) enable_disable = 0; else if (unformat (input, "%U", unformat_vnet_sw_interface, cm->vnet_main, &sw_if_index)) ; else break; } if (sw_if_index == ~0) return clib_error_return (0, "Please specify an interface..."); rv = cop_interface_enable_disable (sw_if_index, enable_disable); switch(rv) { case 0: break; case VNET_API_ERROR_INVALID_SW_IF_INDEX: return clib_error_return (0, "Invalid interface, only works on physical ports"); break; case VNET_API_ERROR_UNIMPLEMENTED: return clib_error_return (0, "Device driver doesn't support redirection"); break; default: return clib_error_return (0, "cop_interface_enable_disable returned %d", rv); } return 0; } VLIB_CLI_COMMAND (cop_interface_command, static) = { .path = "cop interface", .short_help = "cop interface <interface-name> [disable]", .function = cop_enable_disable_command_fn, }; int cop_whitelist_enable_disable (cop_whitelist_enable_disable_args_t *a) { cop_main_t * cm = &cop_main; vlib_main_t * vm = cm->vlib_main; ip4_main_t * im4 = &ip4_main; ip6_main_t * im6 = &ip6_main; int address_family; int is_add; cop_config_main_t * ccm; u32 next_to_add_del = 0; uword * p; u32 fib_index = 0; u32 ci; cop_config_data_t _data, *data=&_data; /* * Enable / disable whitelist processing on the specified interface */ for (address_family = VNET_COP_IP4; address_family < VNET_N_COPS; address_family++) { ccm = &cm->cop_config_mains[address_family]; switch(address_family) { case VNET_COP_IP4: is_add = (a->ip4 != 0); next_to_add_del = IP4_RX_COP_WHITELIST; /* configured opaque data must match, or no supper */ p = hash_get (im4->fib_index_by_table_id, a->fib_id); if (p) fib_index = p[0]; else { if (is_add) return VNET_API_ERROR_NO_SUCH_FIB; else continue; } break; case VNET_COP_IP6: is_add = (a->ip6 != 0); next_to_add_del = IP6_RX_COP_WHITELIST; p = hash_get (im6->fib_index_by_table_id, a->fib_id); if (p) fib_index = p[0]; else { if (is_add) return VNET_API_ERROR_NO_SUCH_FIB; else continue; } break; case VNET_COP_DEFAULT: is_add = (a->default_cop != 0); next_to_add_del = DEFAULT_RX_COP_WHITELIST; break; default: clib_warning ("BUG"); } ci = ccm->config_index_by_sw_if_index[a->sw_if_index]; data->fib_index = fib_index; if (is_add) ci = vnet_config_add_feature (vm, &ccm->config_main, ci, next_to_add_del, data, sizeof (*data)); else ci = vnet_config_del_feature (vm, &ccm->config_main, ci, next_to_add_del, data, sizeof (*data)); ccm->config_index_by_sw_if_index[a->sw_if_index] = ci; } return 0; } static clib_error_t * cop_whitelist_enable_disable_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { cop_main_t * cm = &cop_main; u32 sw_if_index = ~0; u8 ip4 = 0; u8 ip6 = 0; u8 default_cop = 0; u32 fib_id = 0; int rv; cop_whitelist_enable_disable_args_t _a, * a = &_a; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "ip4")) ip4 = 1; else if (unformat (input, "ip6")) ip6 = 1; else if (unformat (input, "default")) default_cop = 1; else if (unformat (input, "%U", unformat_vnet_sw_interface, cm->vnet_main, &sw_if_index)) ; else if (unformat (input, "fib-id %d", &fib_id)) ; else break; } if (sw_if_index == ~0) return clib_error_return (0, "Please specify an interface..."); a->sw_if_index = sw_if_index; a->ip4 = ip4; a->ip6 = ip6; a->default_cop = default_cop; a->fib_id = fib_id; rv = cop_whitelist_enable_disable (a); switch(rv) { case 0: break; case VNET_API_ERROR_INVALID_SW_IF_INDEX: return clib_error_return (0, "Invalid interface, only works on physical ports"); break; case VNET_API_ERROR_NO_SUCH_FIB: return clib_error_return (0, "Invalid fib"); break; case VNET_API_ERROR_UNIMPLEMENTED: return clib_error_return (0, "Device driver doesn't support redirection"); break; default: return clib_error_return (0, "cop_whitelist_enable_disable returned %d", rv); } return 0; } VLIB_CLI_COMMAND (cop_whitelist_command, static) = { .path = "cop whitelist", .short_help = "cop whitelist <interface-name> [ip4][ip6][default][fib-id <NN>][disable]", .function = cop_whitelist_enable_disable_command_fn, };