/* * 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. */ /** * @brief * The data-path object representing l3_proxying the packet, i.e. it's for-us */ #include <vlib/vlib.h> #include <vnet/ip/ip.h> #include <vnet/dpo/l3_proxy_dpo.h> /** * @brief pool of all l3_proxy DPOs */ l3_proxy_dpo_t *l3_proxy_dpo_pool; static l3_proxy_dpo_t * l3_proxy_dpo_alloc (void) { l3_proxy_dpo_t *l3p; pool_get_aligned(l3_proxy_dpo_pool, l3p, CLIB_CACHE_LINE_BYTES); clib_memset(l3p, 0, sizeof(*l3p)); return (l3p); } static l3_proxy_dpo_t * l3_proxy_dpo_get_from_dpo (const dpo_id_t *dpo) { ASSERT(DPO_L3_PROXY == dpo->dpoi_type); return (l3_proxy_dpo_get(dpo->dpoi_index)); } /* * l3_proxy_dpo_add_or_lock * * The next_hop address here is used for source address selection in the DP. * The local adj is added to an interface's l3_proxy prefix, the next-hop * passed here is the local prefix on the same interface. */ void l3_proxy_dpo_add_or_lock (dpo_proto_t proto, u32 sw_if_index, dpo_id_t *dpo) { l3_proxy_dpo_t *l3p; l3p = l3_proxy_dpo_alloc(); l3p->l3p_sw_if_index = sw_if_index; dpo_set(dpo, DPO_L3_PROXY, proto, (l3p - l3_proxy_dpo_pool)); } static void l3_proxy_dpo_lock (dpo_id_t *dpo) { l3_proxy_dpo_t *l3p; l3p = l3_proxy_dpo_get_from_dpo(dpo); l3p->l3p_locks++; } static void l3_proxy_dpo_unlock (dpo_id_t *dpo) { l3_proxy_dpo_t *l3p; l3p = l3_proxy_dpo_get_from_dpo(dpo); l3p->l3p_locks--; if (0 == l3p->l3p_locks) { pool_put(l3_proxy_dpo_pool, l3p); } } static u32 l3_proxy_dpo_get_urpf (const dpo_id_t *dpo) { l3_proxy_dpo_t *l3p; l3p = l3_proxy_dpo_get_from_dpo(dpo); return (l3p->l3p_sw_if_index); } static u8* format_l3_proxy_dpo (u8 *s, va_list *ap) { CLIB_UNUSED(index_t index) = va_arg(*ap, index_t); CLIB_UNUSED(u32 indent) = va_arg(*ap, u32); vnet_main_t * vnm = vnet_get_main(); l3_proxy_dpo_t *l3p; if (pool_is_free_index(l3_proxy_dpo_pool, index)) { return (format(s, "dpo-l3_proxy DELETED")); } l3p = l3_proxy_dpo_get(index); if (~0 != l3p->l3p_sw_if_index) { return (format(s, "dpo-l3_proxy: %U", format_vnet_sw_interface_name, vnm, vnet_get_sw_interface(vnm, l3p->l3p_sw_if_index))); } else { return (format(s, "dpo-l3-proxy")); } } static void l3_proxy_dpo_mem_show (void) { fib_show_memory_usage("L3 Proxy", pool_elts(l3_proxy_dpo_pool), pool_len(l3_proxy_dpo_pool), sizeof(l3_proxy_dpo_t)); } const static dpo_vft_t l3_proxy_vft = { .dv_lock = l3_proxy_dpo_lock, .dv_unlock = l3_proxy_dpo_unlock, .dv_format = format_l3_proxy_dpo, .dv_get_urpf = l3_proxy_dpo_get_urpf, .dv_mem_show = l3_proxy_dpo_mem_show, }; /** * @brief The per-protocol VLIB graph nodes that are assigned to a l3_proxy * object. * * this means that these graph nodes are ones from which a l3_proxy is the * parent object in the DPO-graph. */ const static char* const l3_proxy_ip4_nodes[] = { "ip4-local", NULL, }; const static char* const l3_proxy_ip6_nodes[] = { "ip6-local", NULL, }; const static char* const * const l3_proxy_nodes[DPO_PROTO_NUM] = { [DPO_PROTO_IP4] = l3_proxy_ip4_nodes, [DPO_PROTO_IP6] = l3_proxy_ip6_nodes, [DPO_PROTO_MPLS] = NULL, }; void l3_proxy_dpo_module_init (void) { dpo_register(DPO_L3_PROXY, &l3_proxy_vft, l3_proxy_nodes); }