diff options
Diffstat (limited to 'src/vnet/classify/input_acl.c')
| -rw-r--r-- | src/vnet/classify/input_acl.c | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/src/vnet/classify/input_acl.c b/src/vnet/classify/input_acl.c new file mode 100644 index 00000000..c446f2d6 --- /dev/null +++ b/src/vnet/classify/input_acl.c @@ -0,0 +1,283 @@ +/* + * Copyright (c) 2015 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/ip/ip.h> +#include <vnet/classify/vnet_classify.h> +#include <vnet/classify/input_acl.h> + +input_acl_main_t input_acl_main; + +static int +vnet_inacl_ip_feature_enable (vlib_main_t * vnm, + input_acl_main_t *am, + u32 sw_if_index, + input_acl_table_id_t tid, + int feature_enable) +{ + + if (tid == INPUT_ACL_TABLE_L2) + { + l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_ACL, + feature_enable); + } + else + { /* IP[46] */ + vnet_feature_config_main_t *fcm; + u8 arc; + + if (tid == INPUT_ACL_TABLE_IP4) + { + vnet_feature_enable_disable ("ip4-unicast", "ip4-inacl", + sw_if_index, feature_enable, 0, 0); + arc = vnet_get_feature_arc_index ("ip4-unicast"); + } + else + { + vnet_feature_enable_disable ("ip6-unicast", "ip6-inacl", + sw_if_index, feature_enable, 0, 0); + arc = vnet_get_feature_arc_index ("ip6-unicast"); + } + + fcm = vnet_get_feature_arc_config_main (arc); + am->vnet_config_main[tid] = &fcm->config_main; + } + + return 0; +} + +int vnet_set_input_acl_intfc (vlib_main_t * vm, u32 sw_if_index, + u32 ip4_table_index, + u32 ip6_table_index, + u32 l2_table_index, u32 is_add) +{ + input_acl_main_t * am = &input_acl_main; + vnet_classify_main_t * vcm = am->vnet_classify_main; + u32 acl[INPUT_ACL_N_TABLES] = {ip4_table_index, ip6_table_index, + l2_table_index}; + u32 ti; + + /* Assume that we've validated sw_if_index in the API layer */ + + for (ti = 0; ti < INPUT_ACL_N_TABLES; ti++) + { + if (acl[ti] == ~0) + continue; + + if (pool_is_free_index (vcm->tables, acl[ti])) + return VNET_API_ERROR_NO_SUCH_TABLE; + + vec_validate_init_empty + (am->classify_table_index_by_sw_if_index[ti], sw_if_index, ~0); + + /* Reject any DEL operation with wrong sw_if_index */ + if (!is_add && + (acl[ti] != am->classify_table_index_by_sw_if_index[ti][sw_if_index])) + { + clib_warning ("Non-existent intf_idx=%d with table_index=%d for delete", + sw_if_index, acl[ti]); + return VNET_API_ERROR_NO_SUCH_TABLE; + } + + /* Return ok on ADD operaton if feature is already enabled */ + if (is_add && + am->classify_table_index_by_sw_if_index[ti][sw_if_index] != ~0) + return 0; + + vnet_inacl_ip_feature_enable (vm, am, sw_if_index, ti, is_add); + + if (is_add) + am->classify_table_index_by_sw_if_index[ti][sw_if_index] = acl[ti]; + else + am->classify_table_index_by_sw_if_index[ti][sw_if_index] = ~0; + } + + return 0; +} + +static clib_error_t * +set_input_acl_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + vnet_main_t * vnm = vnet_get_main(); + u32 sw_if_index = ~0; + u32 ip4_table_index = ~0; + u32 ip6_table_index = ~0; + u32 l2_table_index = ~0; + u32 is_add = 1; + u32 idx_cnt = 0; + int rv; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "intfc %U", unformat_vnet_sw_interface, + vnm, &sw_if_index)) + ; + else if (unformat (input, "ip4-table %d", &ip4_table_index)) + idx_cnt++; + else if (unformat (input, "ip6-table %d", &ip6_table_index)) + idx_cnt++; + else if (unformat (input, "l2-table %d", &l2_table_index)) + idx_cnt++; + else if (unformat (input, "del")) + is_add = 0; + else + break; + } + + if (sw_if_index == ~0) + return clib_error_return (0, "Interface must be specified."); + + if (!idx_cnt) + return clib_error_return (0, "Table index should be specified."); + + if (idx_cnt > 1) + return clib_error_return (0, "Only one table index per API is allowed."); + + rv = vnet_set_input_acl_intfc (vm, sw_if_index, ip4_table_index, + ip6_table_index, l2_table_index, is_add); + + switch (rv) + { + case 0: + break; + + case VNET_API_ERROR_NO_MATCHING_INTERFACE: + return clib_error_return (0, "No such interface"); + + case VNET_API_ERROR_NO_SUCH_ENTRY: + return clib_error_return (0, "No such classifier table"); + } + return 0; +} + +/* + * Configure interface to enable/disble input ACL feature: + * intfc - interface name to be configured as input ACL + * Ip4-table <index> [del] - enable/disable IP4 input ACL + * Ip6-table <index> [del] - enable/disable IP6 input ACL + * l2-table <index> [del] - enable/disable Layer2 input ACL + * + * Note: Only one table index per API call is allowed. + * + */ +VLIB_CLI_COMMAND (set_input_acl_command, static) = { + .path = "set interface input acl", + .short_help = + "set interface input acl intfc <int> [ip4-table <index>]\n" + " [ip6-table <index>] [l2-table <index>] [del]", + .function = set_input_acl_command_fn, +}; + +clib_error_t *input_acl_init (vlib_main_t *vm) +{ + input_acl_main_t * am = &input_acl_main; + clib_error_t * error = 0; + + if ((error = vlib_call_init_function (vm, ip_inacl_init))) + return error; + + am->vlib_main = vm; + am->vnet_main = vnet_get_main(); + am->vnet_classify_main = &vnet_classify_main; + + return 0; +} + +VLIB_INIT_FUNCTION (input_acl_init); + +uword unformat_acl_type (unformat_input_t * input, va_list * args) +{ + u32 * acl_type = va_arg (*args, u32 *); + u32 tid = INPUT_ACL_N_TABLES; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { + if (unformat (input, "ip4")) + tid = INPUT_ACL_TABLE_IP4; + else if (unformat (input, "ip6")) + tid = INPUT_ACL_TABLE_IP6; + else if (unformat (input, "l2")) + tid = INPUT_ACL_TABLE_L2; + else + break; + } + + *acl_type = tid; + return 1; +} + +u8 * format_vnet_inacl_info (u8 * s, va_list * va) +{ + input_acl_main_t * am = va_arg (*va, input_acl_main_t *); + int sw_if_idx = va_arg (*va, int); + u32 tid = va_arg (*va, u32); + + if (tid == ~0) + { + s = format (s, "%10s%20s\t\t%s", "Intfc idx", "Classify table", + "Interface name"); + return s; + } + + s = format (s, "%10d%20d\t\t%U", sw_if_idx, tid, + format_vnet_sw_if_index_name, am->vnet_main, sw_if_idx); + + return s; +} + +static clib_error_t * +show_inacl_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + input_acl_main_t * am = &input_acl_main; + u32 type = INPUT_ACL_N_TABLES; + int i; + u32 * vec_tbl; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "type %U", unformat_acl_type, &type)) + ; + else + break; + } + + if (type == INPUT_ACL_N_TABLES) + return clib_error_return (0, "Invalid input ACL table type."); + + vec_tbl = am->classify_table_index_by_sw_if_index[type]; + + if (vec_len(vec_tbl)) + vlib_cli_output (vm, "%U", format_vnet_inacl_info, am, ~0 /* hdr */, ~0); + else + vlib_cli_output (vm, "No input ACL tables configured"); + + for (i = 0; i < vec_len (vec_tbl); i++) + { + if (vec_elt(vec_tbl, i) == ~0) + continue; + + vlib_cli_output (vm, "%U", format_vnet_inacl_info, + am, i, vec_elt(vec_tbl, i)); + } + + return 0; +} + +VLIB_CLI_COMMAND (show_inacl_command, static) = { + .path = "show inacl", + .short_help = "show inacl type [ip4|ip6|l2]", + .function = show_inacl_command_fn, +}; 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