/* * 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 <plugins/gbp/gbp_route_domain.h> #include <plugins/gbp/gbp_endpoint.h> #include <vnet/dpo/dvr_dpo.h> #include <vnet/fib/fib_table.h> /** * A fixed MAC address to use as the source MAC for packets L3 switched * onto the routed uu-fwd interfaces. * Magic values - origin lost to the mists of time... */ /* *INDENT-OFF* */ const static mac_address_t GBP_ROUTED_SRC_MAC = { .bytes = { 0x0, 0x22, 0xBD, 0xF8, 0x19, 0xFF, } }; const static mac_address_t GBP_ROUTED_DST_MAC = { .bytes = { 00, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, } }; /* *INDENT-ON* */ /** * Pool of GBP route_domains */ gbp_route_domain_t *gbp_route_domain_pool; /** * DB of route_domains */ typedef struct gbp_route_domain_db_t { uword *gbd_by_rd_id; } gbp_route_domain_db_t; static gbp_route_domain_db_t gbp_route_domain_db; static fib_source_t gbp_fib_source; /** * logger */ vlib_log_class_t grd_logger; #define GBP_BD_DBG(...) \ vlib_log_debug (grd_logger, __VA_ARGS__); index_t gbp_route_domain_index (const gbp_route_domain_t * grd) { return (grd - gbp_route_domain_pool); } gbp_route_domain_t * gbp_route_domain_get (index_t i) { return (pool_elt_at_index (gbp_route_domain_pool, i)); } static void gbp_route_domain_lock (index_t i) { gbp_route_domain_t *grd; grd = gbp_route_domain_get (i); grd->grd_locks++; } index_t gbp_route_domain_find (u32 rd_id) { uword *p; p = hash_get (gbp_route_domain_db.gbd_by_rd_id, rd_id); if (NULL != p) return p[0]; return (INDEX_INVALID); } index_t gbp_route_domain_find_and_lock (u32 rd_id) { index_t grdi; grdi = gbp_route_domain_find (rd_id); if (INDEX_INVALID != grdi) { gbp_route_domain_lock (grdi); } return (grdi); } static void gbp_route_domain_db_add (gbp_route_domain_t * grd) { index_t grdi = grd - gbp_route_domain_pool; hash_set (gbp_route_domain_db.gbd_by_rd_id, grd->grd_id, grdi); } static void gbp_route_domain_db_remove (gbp_route_domain_t * grd) { hash_unset (gbp_route_domain_db.gbd_by_rd_id, grd->grd_id); } int gbp_route_domain_add_and_lock (u32 rd_id, gbp_scope_t scope, u32 ip4_table_id, u32 ip6_table_id, u32 ip4_uu_sw_if_index, u32 ip6_uu_sw_if_index) { gbp_route_domain_t *grd; index_t grdi; grdi = gbp_route_domain_find (rd_id); if (INDEX_INVALID == grdi) { fib_protocol_t fproto; pool_get_zero (gbp_route_domain_pool, grd); grd->grd_id = rd_id; grd->grd_scope = scope; grd->grd_table_id[FIB_PROTOCOL_IP4] = ip4_table_id; grd->grd_table_id[FIB_PROTOCOL_IP6] = ip6_table_id; grd->grd_uu_sw_if_index[FIB_PROTOCOL_IP4] = ip4_uu_sw_if_index; grd->grd_uu_sw_if_index[FIB_PROTOCOL_IP6] = ip6_uu_sw_if_index; FOR_EACH_FIB_IP_PROTOCOL (fproto) { grd->grd_fib_index[fproto] = fib_table_find_or_create_and_lock (fproto, grd->grd_table_id[fproto], gbp_fib_source); if (~0 != grd->grd_uu_sw_if_index[fproto]) { ethernet_header_t *eth; u8 *rewrite; rewrite = NULL; vec_validate (rewrite, sizeof (*eth) - 1); eth = (ethernet_header_t *) rewrite; eth->type = clib_host_to_net_u16 ((fproto == FIB_PROTOCOL_IP4 ? ETHERNET_TYPE_IP4 : ETHERNET_TYPE_IP6)); mac_address_to_bytes (gbp_route_domain_get_local_mac (), eth->src_address); mac_address_to_bytes (gbp_route_domain_get_remote_mac (), eth->dst_address); /* * create an adjacency out of the uu-fwd interfaces that will * be used when adding subnet routes. */ grd->grd_adj[fproto] = adj_nbr_add_or_lock_w_rewrite (fproto, fib_proto_to_link (fproto), &ADJ_BCAST_ADDR, grd->grd_uu_sw_if_index[fproto], rewrite); } else { grd->grd_adj[fproto] = INDEX_INVALID; } } gbp_route_domain_db_add (grd); } else { grd = gbp_route_domain_get (grdi); } grd->grd_locks++; GBP_BD_DBG ("add: %U", format_gbp_route_domain, grd); return (0); } void gbp_route_domain_unlock (index_t index) { gbp_route_domain_t *grd; grd = gbp_route_domain_get (index); grd->grd_locks--; if (0 == grd->grd_locks) { fib_protocol_t fproto; GBP_BD_DBG ("destroy: %U", format_gbp_route_domain, grd); FOR_EACH_FIB_IP_PROTOCOL (fproto) { fib_table_unlock (grd->grd_fib_index[fproto], fproto, gbp_fib_source); if (INDEX_INVALID != grd->grd_adj[fproto]) adj_unlock (grd->grd_adj[fproto]); } gbp_route_domain_db_remove (grd); pool_put (gbp_route_domain_pool, grd); } } u32 gbp_route_domain_get_rd_id (index_t grdi) { gbp_route_domain_t *grd; grd = gbp_route_domain_get (grdi); return (grd->grd_id); } gbp_scope_t gbp_route_domain_get_scope (index_t grdi) { gbp_route_domain_t *grd; grd = gbp_route_domain_get (grdi); return (grd->grd_scope); } int gbp_route_domain_delete (u32 rd_id) { index_t grdi; GBP_BD_DBG ("del: %d", rd_id); grdi = gbp_route_domain_find (rd_id); if (INDEX_INVALID != grdi) { GBP_BD_DBG ("del: %U", format_gbp_route_domain, gbp_route_domain_get (grdi)); gbp_route_domain_unlock (grdi); return (0); } return (VNET_API_ERROR_NO_SUCH_ENTRY); } const mac_address_t * gbp_route_domain_get_local_mac (void) { return (&GBP_ROUTED_SRC_MAC); } const mac_address_t * gbp_route_domain_get_remote_mac (void) { return (&GBP_ROUTED_DST_MAC); } void gbp_route_domain_walk (gbp_route_domain_cb_t cb, void *ctx) { gbp_route_domain_t *gbpe; /* *INDENT-OFF* */ pool_foreach (gbpe, gbp_route_domain_pool) { if (!cb(gbpe, ctx)) break; } /* *INDENT-ON* */ } static clib_error_t * gbp_route_domain_cli (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vnet_main_t *vnm = vnet_get_main (); u32 ip4_uu_sw_if_index = ~0; u32 ip6_uu_sw_if_index = ~0; u32 ip4_table_id = ~0; u32 ip6_table_id = ~0; u32 scope = ~0; u32 rd_id = ~0; u8 add = 1; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "ip4-uu %U", unformat_vnet_sw_interface, vnm, &ip4_uu_sw_if_index)) ; else if (unformat (input, "ip6-uu %U", unformat_vnet_sw_interface, vnm, &ip6_uu_sw_if_index)) ; else if (unformat (input, "ip4-table-id %d", &ip4_table_id)) ; else if (unformat (input, "ip6-table-id %d", &ip6_table_id)) ; else if (unformat (input, "add")) add = 1; else if (unformat (input, "del")) add = 0; else if (unformat (input, "rd %d", &rd_id)) ; else if (unformat (input, "scope %d", &scope)) ; else break; } if (~0 == rd_id) return clib_error_return (0, "RD-ID must be specified"); if (add) { if (~0 == ip4_table_id) return clib_error_return (0, "IP4 table-ID must be specified"); if (~0 == ip6_table_id) return clib_error_return (0, "IP6 table-ID must be specified"); gbp_route_domain_add_and_lock (rd_id, scope, ip4_table_id, ip6_table_id, ip4_uu_sw_if_index, ip6_uu_sw_if_index); } else gbp_route_domain_delete (rd_id); return (NULL); } /*? * Configure a GBP route-domain * * @cliexpar * @cliexstart{gbp route-domain [del] rd <ID> ip4-table-id <ID> ip6-table-id <ID> [ip4-uu <interface>] [ip6-uu <interface>]} * @cliexend ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (gbp_route_domain_cli_node, static) = { .path = "gbp route-domain", .short_help = "gbp route-domain [del] rd <ID> ip4-table-id <ID> ip6-table-id <ID> [ip4-uu <interface>] [ip6-uu <interface>]", .function = gbp_route_domain_cli, }; u8 * format_gbp_route_domain (u8 * s, va_list * args) { gbp_route_domain_t *grd = va_arg (*args, gbp_route_domain_t*); vnet_main_t *vnm = vnet_get_main (); if (NULL != grd) s = format (s, "[%d] rd:%d ip4-uu:%U ip6-uu:%U locks:%d", grd - gbp_route_domain_pool, grd->grd_id, format_vnet_sw_if_index_name, vnm, grd->grd_uu_sw_if_index[FIB_PROTOCOL_IP4], format_vnet_sw_if_index_name, vnm, grd->grd_uu_sw_if_index[FIB_PROTOCOL_IP6], grd->grd_locks); else s = format (s, "NULL"); return (s); } static int gbp_route_domain_show_one (gbp_route_domain_t *gb, void *ctx) { vlib_main_t *vm; vm = ctx; vlib_cli_output (vm, " %U",format_gbp_route_domain, gb); return (1); } static clib_error_t * gbp_route_domain_show (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vlib_cli_output (vm, "Route-Domains:"); gbp_route_domain_walk (gbp_route_domain_show_one, vm); return (NULL); } /*? * Show Group Based Policy Route_Domains and derived information * * @cliexpar * @cliexstart{show gbp route_domain} * @cliexend ?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (gbp_route_domain_show_node, static) = { .path = "show gbp route-domain", .short_help = "show gbp route-domain\n", .function = gbp_route_domain_show, }; /* *INDENT-ON* */ static clib_error_t * gbp_route_domain_init (vlib_main_t * vm) { grd_logger = vlib_log_register_class ("gbp", "rd"); gbp_fib_source = fib_source_allocate ("gbp-rd", FIB_SOURCE_PRIORITY_HI, FIB_SOURCE_BH_DROP); return (NULL); } VLIB_INIT_FUNCTION (gbp_route_domain_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */