/* * 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. */ /** * @file * @brief NAT44 endpoint-dependent inside to outside network translation */ #include #include #include #include #include #include #include #include #include #include #include #include /* number of attempts to get a port for ED overloading algorithm, if rolling * a dice this many times doesn't produce a free port, it's treated * as if there were no free ports available to conserve resources */ #define ED_PORT_ALLOC_ATTEMPTS (10) static char *nat_in2out_ed_error_strings[] = { #define _(sym,string) string, foreach_nat_in2out_ed_error #undef _ }; typedef struct { u32 sw_if_index; u32 next_index; u32 session_index; nat_translation_error_e translation_error; nat_6t_flow_t i2of; nat_6t_flow_t o2if; clib_bihash_kv_16_8_t search_key; u8 is_slow_path; u8 translation_via_i2of; u8 lookup_skipped; } nat_in2out_ed_trace_t; static u8 * format_nat_in2out_ed_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); nat_in2out_ed_trace_t *t = va_arg (*args, nat_in2out_ed_trace_t *); char *tag; tag = t->is_slow_path ? "NAT44_IN2OUT_ED_SLOW_PATH" : "NAT44_IN2OUT_ED_FAST_PATH"; s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag, t->sw_if_index, t->next_index, t->session_index); if (~0 != t->session_index) { s = format (s, ", translation result '%U' via %s", format_nat_ed_translation_error, t->translation_error, t->translation_via_i2of ? "i2of" : "o2if"); s = format (s, "\n i2of %U", format_nat_6t_flow, &t->i2of); s = format (s, "\n o2if %U", format_nat_6t_flow, &t->o2if); } if (!t->is_slow_path) { if (t->lookup_skipped) { s = format (s, "\n lookup skipped - cached session index used"); } else { s = format (s, "\n search key %U", format_ed_session_kvp, &t->search_key); } } return s; } /** * @brief Check if packet should be translated * * Packets aimed at outside interface and external address with active session * should be translated. * * @param sm NAT main * @param rt NAT runtime data * @param sw_if_index0 index of the inside interface * @param ip0 IPv4 header * @param proto0 NAT protocol * @param rx_fib_index0 RX FIB index * * @returns 0 if packet should be translated otherwise 1 */ static inline int snat_not_translate_fast (snat_main_t *sm, vlib_node_runtime_t *node, u32 sw_if_index0, ip4_header_t *ip0, u32 proto0, u32 rx_fib_index0) { fib_node_index_t fei = FIB_NODE_INDEX_INVALID; nat_outside_fib_t *outside_fib; fib_prefix_t pfx = { .fp_proto = FIB_PROTOCOL_IP4, .fp_len = 32, .fp_addr = { .ip4.as_u32 = ip0->dst_address.as_u32, } , }; /* Don't NAT packet aimed at the intfc address */ if (PREDICT_FALSE ( is_interface_addr (sm, node, sw_if_index0, ip0->dst_address.as_u32))) return 1; fei = fib_table_lookup (rx_fib_index0, &pfx); if (FIB_NODE_INDEX_INVALID != fei) { u32 sw_if_index = fib_entry_get_resolving_interface (fei); if (sw_if_index == ~0) { vec_foreach (outside_fib, sm->outside_fibs) { fei = fib_table_lookup (outside_fib->fib_index, &pfx); if (FIB_NODE_INDEX_INVALID != fei) { sw_if_index = fib_entry_get_resolving_interface (fei); if (sw_if_index != ~0) break; } } } if (sw_if_index == ~0) return 1; snat_interface_t *i; pool_foreach (i, sm->interfaces) { /* NAT packet aimed at outside interface */ if ((nat_interface_is_outside (i)) && (sw_if_index == i->sw_if_index)) return 0; } } return 1; } static int nat_ed_alloc_addr_and_port_with_snat_address ( snat_main_t *sm, u32 nat_proto, u32 thread_index, snat_address_t *a, u16 port_per_thread, u32 snat_thread_index, snat_session_t *s, ip4_address_t *outside_addr, u16 *outside_port) { const u16 port_thread_offset = (port_per_thread * snat_thread_index) + 1024; s->o2i.match.daddr = a->addr; /* first try port suggested by caller */ u16 port = clib_net_to_host_u16 (*outside_port); u16 port_offset = port - port_thread_offset; if (port <= port_thread_offset || port > port_thread_offset + port_per_thread) { /* need to pick a different port, suggested port doesn't fit in * this thread's port range */ port_offset = snat_random_port (0, port_per_thread - 1); port = port_thread_offset + port_offset; } u16 attempts = ED_PORT_ALLOC_ATTEMPTS; do { if (NAT_PROTOCOL_ICMP == nat_proto) { s->o2i.match.sport = clib_host_to_net_u16 (port); } s->o2i.match.dport = clib_host_to_net_u16 (port); if (0 == nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 2)) { #define _(N, i, n, s) \ case NAT_PROTOCOL_##N: \ ++a->busy_##n##_port_refcounts[port]; \ a->busy_##n##_ports_per_thread[thread_index]++; \ a->busy_##n##_ports++; \ break; switch (nat_proto) { foreach_nat_protocol; default: nat_elog_info (sm, "unknown protocol"); return 1; } #undef _ *outside_addr = a->addr; *outside_port = clib_host_to_net_u16 (port); return 0; } port_offset = snat_random_port (0, port_per_thread - 1); port = port_thread_offset + port_offset; --attempts; } while (attempts > 0); return 1; } static int nat_ed_alloc_addr_and_port (snat_main_t *sm, u32 rx_fib_index, u32 nat_proto, u32 thread_index, ip4_address_t s_addr, u16 port_per_thread, u32 snat_thread_index, snat_session_t *s, ip4_address_t *outside_addr, u16 *outside_port) { int i; snat_address_t *a, *ga = 0; if (vec_len (sm->addresses) > 0) { int s_addr_offset = s_addr.as_u32 % vec_len (sm->addresses); for (i = s_addr_offset; i < vec_len (sm->addresses); ++i) { a = sm->addresses + i; if (a->fib_index == rx_fib_index) { return nat_ed_alloc_addr_and_port_with_snat_address ( sm, nat_proto, thread_index, a, port_per_thread, snat_thread_index, s, outside_addr, outside_port); } else if (a->fib_index == ~0) { ga = a; } } for (i = 0; i < s_addr_offset; ++i) { a = sm->addresses + i; if (a->fib_index == rx_fib_index) { return nat_ed_alloc_addr_and_port_with_snat_address ( sm, nat_proto, thread_index, a, port_per_thread, snat_thread_index, s, outside_addr, outside_port); } else if (a->fib_index == ~0) { ga = a; } } if (ga) { return nat_ed_alloc_addr_and_port_with_snat_address ( sm, nat_proto, thread_index, a, port_per_thread, snat_thread_index, s, outside_addr, outside_port); } } /* Totally out of translations to use... */ nat_ipfix_logging_addresses_exhausted (thread_index, 0); return 1; } static_always_inline u32 nat_outside_fib_index_lookup (snat_main_t * sm, ip4_address_t addr) { fib_node_index_t fei = FIB_NODE_INDEX_INVALID; nat_outside_fib_t *outside_fib; fib_prefix_t pfx = { .fp_proto = FIB_PROTOCOL_IP4, .fp_len = 32, .fp_addr = {.ip4.as_u32 = addr.as_u32,} , }; // TODO: multiple vrfs none can resolve addr vec_foreach (outside_fib, sm->outside_fibs) { fei = fib_table_lookup (outside_fib->fib_index, &pfx); if (FIB_NODE_INDEX_INVALID != fei) { if (fib_entry_get_resolving_interface (fei) != ~0) { return outside_fib->fib_index; } } } return ~0; } static_always_inline int nat44_ed_external_sm_lookup (snat_main_t *sm, ip4_address_t match_addr, u16 match_port, nat_protocol_t match_protocol, u32 match_fib_index, ip4_address_t *daddr, u16 *dport) { clib_bihash_kv_8_8_t kv, value; init_nat_k (&kv, match_addr, match_port, match_fib_index, match_protocol); if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) { /* Try address only mapping */ init_nat_k (&kv, match_addr, 0, 0, 0); if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) return 0; } snat_static_mapping_t *m = pool_elt_at_index (sm->static_mappings, value.value); *daddr = m->local_addr; if (dport) { /* Address only mapping doesn't change port */ *dport = is_addr_only_static_mapping (m) ? match_port : m->local_port; } return 1; } static u32 slow_path_ed (snat_main_t *sm, vlib_buffer_t *b, ip4_address_t l_addr, ip4_address_t r_addr, u16 l_port, u16 r_port, u8 proto, u32 rx_fib_index, snat_session_t **sessionp, vlib_node_runtime_t *node, u32 next, u32 thread_index, f64 now) { snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; ip4_address_t outside_addr; u16 outside_port; u32 outside_fib_index; u8 is_identity_nat; u32 nat_proto = ip_proto_to_nat_proto (proto); snat_session_t *s = NULL; lb_nat_type_t lb = 0; ip4_address_t daddr = r_addr; u16 dport = r_port; if (PREDICT_TRUE (nat_proto == NAT_PROTOCOL_TCP)) { if (PREDICT_FALSE (!tcp_flags_is_init (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))) { b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN]; return NAT_NEXT_DROP; } } if (PREDICT_FALSE (nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index))) { if (!nat_lru_free_one (sm, thread_index, now)) { b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED]; nat_ipfix_logging_max_sessions (thread_index, sm->max_translations_per_thread); nat_elog_notice (sm, "maximum sessions exceeded"); return NAT_NEXT_DROP; } } outside_fib_index = sm->outside_fib_index; switch (vec_len (sm->outside_fibs)) { case 0: outside_fib_index = sm->outside_fib_index; break; case 1: outside_fib_index = sm->outside_fibs[0].fib_index; break; default: outside_fib_index = nat_outside_fib_index_lookup (sm, r_addr); break; } ip4_address_t sm_addr; u16 sm_port; u32 sm_fib_index; /* First try to match static mapping by local address and port */ int is_sm; if (snat_static_mapping_match (sm, l_addr, l_port, rx_fib_index, nat_proto, &sm_addr, &sm_port, &sm_fib_index, 0, 0, 0, &lb, 0, &is_identity_nat, 0)) { is_sm = 0; } else { is_sm = 1; } if (PREDICT_FALSE (is_sm && is_identity_nat)) { *sessionp = NULL; return next; } s = nat_ed_session_alloc (sm, thread_index, now, proto); ASSERT (s); if (!is_sm) { s->in2out.addr = l_addr; s->in2out.port = l_port; s->nat_proto = nat_proto; s->in2out.fib_index = rx_fib_index; s->out2in.fib_index = outside_fib_index; // suggest using local port to allocation function outside_port = l_port; // hairpinning? int is_hairpinning = nat44_ed_external_sm_lookup ( sm, r_addr, r_port, nat_proto, outside_fib_index, &daddr, &dport); s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING; // destination addr/port updated with real values in // nat_ed_alloc_addr_and_port nat_6t_o2i_flow_init (sm, thread_index, s, daddr, dport, daddr, 0, s->out2in.fib_index, proto); nat_6t_flow_daddr_rewrite_set (&s->o2i, l_addr.as_u32); if (NAT_PROTOCOL_ICMP == nat_proto) { nat_6t_flow_icmp_id_rewrite_set (&s->o2i, l_port); } else { nat_6t_flow_dport_rewrite_set (&s->o2i, l_port); } nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index); if (nat_ed_alloc_addr_and_port ( sm, rx_fib_index, nat_proto, thread_index, l_addr, sm->port_per_thread, tsm->snat_thread_index, s, &outside_addr, &outside_port)) { nat_elog_notice (sm, "addresses exhausted"); b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS]; nat_ed_session_delete (sm, s, thread_index, 1); return NAT_NEXT_DROP; } s->out2in.addr = outside_addr; s->out2in.port = outside_port; } else { // static mapping s->out2in.addr = outside_addr = sm_addr; s->out2in.port = outside_port = sm_port; s->in2out.addr = l_addr; s->in2out.port = l_port; s->nat_proto = nat_proto; s->in2out.fib_index = rx_fib_index; s->out2in.fib_index = outside_fib_index; s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; // hairpinning? int is_hairpinning = nat44_ed_external_sm_lookup ( sm, r_addr, r_port, nat_proto, outside_fib_index, &daddr, &dport); s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING; if (NAT_PROTOCOL_ICMP == nat_proto) { nat_6t_o2i_flow_init (sm, thread_index, s, daddr, sm_port, sm_addr, sm_port, s->out2in.fib_index, proto); nat_6t_flow_icmp_id_rewrite_set (&s->o2i, l_port); } else { nat_6t_o2i_flow_init (sm, thread_index, s, daddr, dport, sm_addr, sm_port, s->out2in.fib_index, proto); nat_6t_flow_dport_rewrite_set (&s->o2i, l_port); } nat_6t_flow_daddr_rewrite_set (&s->o2i, l_addr.as_u32); nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index); if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 2)) { nat_elog_notice (sm, "out2in key add failed"); goto error; } } if (lb) s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING; s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; s->ext_host_addr = r_addr; s->ext_host_port = r_port; nat_6t_i2o_flow_init (sm, thread_index, s, l_addr, l_port, r_addr, r_port, rx_fib_index, proto); nat_6t_flow_saddr_rewrite_set (&s->i2o, outside_addr.as_u32); nat_6t_flow_daddr_rewrite_set (&s->i2o, daddr.as_u32); if (NAT_PROTOCOL_ICMP == nat_proto) { nat_6t_flow_icmp_id_rewrite_set (&s->i2o, outside_port); } else { nat_6t_flow_sport_rewrite_set (&s->i2o, outside_port); nat_6t_flow_dport_rewrite_set (&s->i2o, dport); } nat_6t_flow_txfib_rewrite_set (&s->i2o, outside_fib_index); if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1)) { nat_elog_notice (sm, "in2out key add failed"); goto error; } /* log NAT event */ nat_ipfix_logging_nat44_ses_create (thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32, s->nat_proto, s->in2out.port, s->out2in.port, s->in2out.fib_index); nat_syslog_nat44_sadd (0, s->in2out.fib_index, &s->in2out.addr, s->in2out.port, &s->ext_host_nat_addr, s->ext_host_nat_port, &s->out2in.addr, s->out2in.port, &s->ext_host_addr, s->ext_host_port, s->nat_proto, 0); per_vrf_sessions_register_session (s, thread_index); *sessionp = s; return next; error: if (s) { if (!is_sm) { snat_free_outside_address_and_port (sm->addresses, thread_index, &outside_addr, outside_port, nat_proto); } nat_ed_session_delete (sm, s, thread_index, 1); } *sessionp = s = NULL; return NAT_NEXT_DROP; } static_always_inline int nat44_ed_not_translate (snat_main_t *sm, vlib_node_runtime_t *node, u32 sw_if_index, vlib_buffer_t *b, ip4_header_t *ip, u32 proto, u32 rx_fib_index, u32 thread_index) { clib_bihash_kv_16_8_t kv, value; init_ed_k (&kv, ip->dst_address, vnet_buffer (b)->ip.reass.l4_dst_port, ip->src_address, vnet_buffer (b)->ip.reass.l4_src_port, sm->outside_fib_index, ip->protocol); /* NAT packet aimed at external address if has active sessions */ if (clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) { /* or is static mappings */ ip4_address_t placeholder_addr; u16 placeholder_port; u32 placeholder_fib_index; if (!snat_static_mapping_match ( sm, ip->dst_address, vnet_buffer (b)->ip.reass.l4_dst_port, sm->outside_fib_index, proto, &placeholder_addr, &placeholder_port, &placeholder_fib_index, 1, 0, 0, 0, 0, 0, 0)) return 0; } else return 0; if (sm->forwarding_enabled) return 1; return snat_not_translate_fast (sm, node, sw_if_index, ip, proto, rx_fib_index); } static_always_inline int nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip, u32 thread_index, f64 now, vlib_main_t * vm, vlib_buffer_t * b) { clib_bihash_kv_16_8_t kv, value; snat_session_t *s = 0; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; if (!sm->forwarding_enabled) return 0; if (ip->protocol == IP_PROTOCOL_ICMP) { ip4_address_t lookup_saddr, lookup_daddr; u16 lookup_sport, lookup_dport; u8 lookup_protocol; if (nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr, &lookup_sport, &lookup_daddr, &lookup_dport, &lookup_protocol)) return 0; init_ed_k (&kv, lookup_saddr, lookup_sport, lookup_daddr, lookup_dport, 0, lookup_protocol); } else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP) { init_ed_k (&kv, ip->src_address, vnet_buffer (b)->ip.reass.l4_src_port, ip->dst_address, vnet_buffer (b)->ip.reass.l4_dst_port, 0, ip->protocol); } else { init_ed_k (&kv, ip->src_address, 0, ip->dst_address, 0, 0, ip->protocol); } if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) { ASSERT (thread_index == ed_value_get_thread_index (&value)); s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value)); if (is_fwd_bypass_session (s)) { if (ip->protocol == IP_PROTOCOL_TCP) { nat44_set_tcp_session_state_i2o (sm, now, s, b, thread_index); } /* Accounting */ nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b), thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s, thread_index); return 1; } else return 0; } return 0; } static_always_inline int nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip, u16 src_port, u16 dst_port, u32 thread_index, u32 rx_sw_if_index, u32 tx_sw_if_index, f64 now) { clib_bihash_kv_16_8_t kv, value; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; snat_interface_t *i; snat_session_t *s; u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index); u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index); /* src NAT check */ init_ed_k (&kv, ip->src_address, src_port, ip->dst_address, dst_port, tx_fib_index, ip->protocol); if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) { ASSERT (thread_index == ed_value_get_thread_index (&value)); s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value)); if (nat44_is_ses_closed (s) && (!s->tcp_closed_timestamp || now >= s->tcp_closed_timestamp)) { nat_free_session_data (sm, s, thread_index, 0); nat_ed_session_delete (sm, s, thread_index, 1); } return 1; } /* dst NAT check */ init_ed_k (&kv, ip->dst_address, dst_port, ip->src_address, src_port, rx_fib_index, ip->protocol); if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) { ASSERT (thread_index == ed_value_get_thread_index (&value)); s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value)); if (is_fwd_bypass_session (s)) return 0; /* hairpinning */ pool_foreach (i, sm->output_feature_interfaces) { if ((nat_interface_is_inside (i)) && (rx_sw_if_index == i->sw_if_index)) return 0; } return 1; } return 0; } static inline u32 icmp_in2out_ed_slow_path (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, icmp46_header_t *icmp, u32 sw_if_index, u32 rx_fib_index, vlib_node_runtime_t *node, u32 next, f64 now, u32 thread_index, nat_protocol_t nat_proto, snat_session_t **s_p) { vlib_main_t *vm = vlib_get_main (); u16 checksum; int err; snat_session_t *s = NULL; u8 lookup_protocol = ip->protocol; u16 lookup_sport, lookup_dport; ip4_address_t lookup_saddr, lookup_daddr; err = nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr, &lookup_sport, &lookup_daddr, &lookup_dport, &lookup_protocol); if (err != 0) { b->error = node->errors[err]; return NAT_NEXT_DROP; } if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0) { if (PREDICT_FALSE (nat44_ed_not_translate_output_feature ( sm, ip, lookup_sport, lookup_dport, thread_index, sw_if_index, vnet_buffer (b)->sw_if_index[VLIB_TX], now))) { return next; } } else { if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index, b, ip, NAT_PROTOCOL_ICMP, rx_fib_index, thread_index))) { return next; } } if (PREDICT_FALSE (icmp_type_is_error_message ( vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))) { b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE]; return NAT_NEXT_DROP; } next = slow_path_ed (sm, b, ip->src_address, ip->dst_address, lookup_sport, lookup_dport, ip->protocol, rx_fib_index, &s, node, next, thread_index, vlib_time_now (vm)); if (NAT_NEXT_DROP == next) goto out; if (PREDICT_TRUE (!ip4_is_fragment (ip))) { ip_csum_t sum = ip_incremental_checksum_buffer ( vm, b, (u8 *) icmp - (u8 *) vlib_buffer_get_current (b), ntohs (ip->length) - ip4_header_bytes (ip), 0); checksum = ~ip_csum_fold (sum); if (PREDICT_FALSE (checksum != 0 && checksum != 0xffff)) { next = NAT_NEXT_DROP; goto out; } } out: if (PREDICT_TRUE (next != NAT_NEXT_DROP && s)) { /* Accounting */ nat44_session_update_counters ( s, now, vlib_buffer_length_in_chain (vm, b), thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s, thread_index); } *s_p = s; return next; } static snat_session_t * nat44_ed_in2out_slowpath_unknown_proto (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, u32 rx_fib_index, u32 thread_index, f64 now, vlib_main_t *vm, vlib_node_runtime_t *node) { clib_bihash_kv_8_8_t kv, value; clib_bihash_kv_16_8_t s_kv, s_value; snat_static_mapping_t *m = NULL; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; snat_session_t *s = NULL; u32 outside_fib_index = sm->outside_fib_index; int i; ip4_address_t new_src_addr = { 0 }; ip4_address_t new_dst_addr = ip->dst_address; if (PREDICT_FALSE ( nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index))) { b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED]; nat_ipfix_logging_max_sessions (thread_index, sm->max_translations_per_thread); nat_elog_notice (sm, "maximum sessions exceeded"); return 0; } switch (vec_len (sm->outside_fibs)) { case 0: outside_fib_index = sm->outside_fib_index; break; case 1: outside_fib_index = sm->outside_fibs[0].fib_index; break; default: outside_fib_index = nat_outside_fib_index_lookup (sm, ip->dst_address); break; } init_nat_k (&kv, ip->src_address, 0, rx_fib_index, 0); /* Try to find static mapping first */ if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value)) { m = pool_elt_at_index (sm->static_mappings, value.value); new_src_addr = m->external_addr; } else { pool_foreach (s, tsm->sessions) { if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32) { init_ed_k (&s_kv, s->out2in.addr, 0, ip->dst_address, 0, outside_fib_index, ip->protocol); if (clib_bihash_search_16_8 (&sm->flow_hash, &s_kv, &s_value)) { new_src_addr = s->out2in.addr; } break; } } if (!new_src_addr.as_u32) { for (i = 0; i < vec_len (sm->addresses); i++) { init_ed_k (&s_kv, sm->addresses[i].addr, 0, ip->dst_address, 0, outside_fib_index, ip->protocol); if (clib_bihash_search_16_8 (&sm->flow_hash, &s_kv, &s_value)) { new_src_addr = sm->addresses[i].addr; } } } } if (!new_src_addr.as_u32) { // could not allocate address for translation ... return 0; } s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol); if (!s) { b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED]; nat_elog_warn (sm, "create NAT session failed"); return 0; } nat_6t_i2o_flow_init (sm, thread_index, s, ip->src_address, 0, ip->dst_address, 0, rx_fib_index, ip->protocol); nat_6t_flow_saddr_rewrite_set (&s->i2o, new_src_addr.as_u32); nat_6t_flow_txfib_rewrite_set (&s->i2o, outside_fib_index); // hairpinning? int is_hairpinning = nat44_ed_external_sm_lookup (sm, ip->dst_address, 0, NAT_PROTOCOL_OTHER, outside_fib_index, &new_dst_addr, NULL); s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING; nat_6t_flow_daddr_rewrite_set (&s->i2o, new_dst_addr.as_u32); nat_6t_flow_txfib_rewrite_set (&s->i2o, outside_fib_index); nat_6t_o2i_flow_init (sm, thread_index, s, new_dst_addr, 0, new_src_addr, 0, outside_fib_index, ip->protocol); nat_6t_flow_saddr_rewrite_set (&s->o2i, ip->dst_address.as_u32); nat_6t_flow_daddr_rewrite_set (&s->o2i, ip->src_address.as_u32); nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index); s->ext_host_addr.as_u32 = ip->dst_address.as_u32; s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO; s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; s->out2in.addr.as_u32 = new_src_addr.as_u32; s->out2in.fib_index = outside_fib_index; s->in2out.addr.as_u32 = ip->src_address.as_u32; s->in2out.fib_index = rx_fib_index; s->in2out.port = s->out2in.port = ip->protocol; if (m) s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1)) { nat_elog_notice (sm, "in2out flow hash add failed"); nat_ed_session_delete (sm, s, thread_index, 1); return NULL; } if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 1)) { nat_elog_notice (sm, "out2in flow hash add failed"); nat_ed_session_delete (sm, s, thread_index, 1); return NULL; } per_vrf_sessions_register_session (s, thread_index); /* Accounting */ nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b), thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s, thread_index); return s; } static inline uword nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int is_output_feature, int is_multi_worker) { u32 n_left_from, *from; snat_main_t *sm = &snat_main; f64 now = vlib_time_now (vm); u32 thread_index = vm->thread_index; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; u32 def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH : NAT_NEXT_IN2OUT_ED_SLOW_PATH; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; u16 nexts[VLIB_FRAME_SIZE], *next = nexts; vlib_get_buffers (vm, from, b, n_left_from); while (n_left_from > 0) { vlib_buffer_t *b0; u32 sw_if_index0, rx_fib_index0, iph_offset0 = 0; nat_protocol_t proto0; ip4_header_t *ip0; snat_session_t *s0 = 0; clib_bihash_kv_16_8_t kv0, value0; nat_translation_error_e translation_error = NAT_ED_TRNSL_ERR_SUCCESS; nat_6t_flow_t *f = 0; nat_6t_t lookup; int lookup_skipped = 0; b0 = *b; b++; /* Prefetch next iteration. */ if (PREDICT_TRUE (n_left_from >= 2)) { vlib_buffer_t *p2; p2 = *b; vlib_prefetch_buffer_header (p2, LOAD); CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD); } if (is_output_feature) { iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; } next[0] = vnet_buffer2 (b0)->nat.arc_next; ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0); lookup.fib_index = rx_fib_index0; if (PREDICT_FALSE (ip0->ttl == 1)) { vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, ICMP4_time_exceeded_ttl_exceeded_in_transit, 0); next[0] = NAT_NEXT_ICMP_ERROR; goto trace0; } proto0 = ip_proto_to_nat_proto (ip0->protocol); if (is_output_feature) { if (PREDICT_FALSE (nat_not_translate_output_feature_fwd (sm, ip0, thread_index, now, vm, b0))) goto trace0; } if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) { if (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != ICMP4_echo_request && vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != ICMP4_echo_reply && !icmp_type_is_error_message ( vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags)) { b0->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE]; next[0] = NAT_NEXT_DROP; goto trace0; } int err = nat_get_icmp_session_lookup_values ( b0, ip0, &lookup.saddr, &lookup.sport, &lookup.daddr, &lookup.dport, &lookup.proto); if (err != 0) { b0->error = node->errors[err]; next[0] = NAT_NEXT_DROP; goto trace0; } } else { lookup.proto = ip0->protocol; lookup.saddr.as_u32 = ip0->src_address.as_u32; lookup.daddr.as_u32 = ip0->dst_address.as_u32; lookup.sport = vnet_buffer (b0)->ip.reass.l4_src_port; lookup.dport = vnet_buffer (b0)->ip.reass.l4_dst_port; } /* there might be a stashed index in vnet_buffer2 from handoff or * classify node, see if it can be used */ if (is_multi_worker && !pool_is_free_index (tsm->sessions, vnet_buffer2 (b0)->nat.cached_session_index)) { s0 = pool_elt_at_index (tsm->sessions, vnet_buffer2 (b0)->nat.cached_session_index); if (PREDICT_TRUE ( nat_6t_t_eq (&s0->i2o.match, &lookup) // for some hairpinning cases there are two "i2i" flows instead // of i2o and o2i as both hosts are on inside || (s0->flags & SNAT_SESSION_FLAG_HAIRPINNING && nat_6t_t_eq (&s0->o2i.match, &lookup)))) { /* yes, this is the droid we're looking for */ lookup_skipped = 1; goto skip_lookup; } s0 = NULL; } init_ed_k (&kv0, lookup.saddr, lookup.sport, lookup.daddr, lookup.dport, lookup.fib_index, lookup.proto); // lookup flow if (clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0)) { // flow does not exist go slow path next[0] = def_slow; goto trace0; } ASSERT (thread_index == ed_value_get_thread_index (&value0)); s0 = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value0)); skip_lookup: if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index))) { // session is closed, go slow path nat_free_session_data (sm, s0, thread_index, 0); nat_ed_session_delete (sm, s0, thread_index, 1); next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; goto trace0; } if (s0->tcp_closed_timestamp) { if (now >= s0->tcp_closed_timestamp) { // session is closed, go slow path, freed in slow path next[0] = def_slow; } else { // session in transitory timeout, drop b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED]; next[0] = NAT_NEXT_DROP; } goto trace0; } // drop if session expired u64 sess_timeout_time; sess_timeout_time = s0->last_heard + (f64) nat44_session_get_timeout (sm, s0); if (now >= sess_timeout_time) { nat_free_session_data (sm, s0, thread_index, 0); nat_ed_session_delete (sm, s0, thread_index, 1); // session is closed, go slow path next[0] = def_slow; goto trace0; } b0->flags |= VNET_BUFFER_F_IS_NATED; if (nat_6t_t_eq (&s0->i2o.match, &lookup)) { f = &s0->i2o; } else if (s0->flags & SNAT_SESSION_FLAG_HAIRPINNING && nat_6t_t_eq (&s0->o2i.match, &lookup)) { f = &s0->o2i; } else { translation_error = NAT_ED_TRNSL_ERR_FLOW_MISMATCH; nat_free_session_data (sm, s0, thread_index, 0); nat_ed_session_delete (sm, s0, thread_index, 1); next[0] = NAT_NEXT_DROP; goto trace0; } if (NAT_ED_TRNSL_ERR_SUCCESS != (translation_error = nat_6t_flow_buf_translate ( sm, b0, ip0, f, proto0, is_output_feature))) { nat_free_session_data (sm, s0, thread_index, 0); nat_ed_session_delete (sm, s0, thread_index, 1); next[0] = NAT_NEXT_DROP; goto trace0; } switch (proto0) { case NAT_PROTOCOL_TCP: vlib_increment_simple_counter (&sm->counters.fastpath.in2out.tcp, thread_index, sw_if_index0, 1); nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index); break; case NAT_PROTOCOL_UDP: vlib_increment_simple_counter (&sm->counters.fastpath.in2out.udp, thread_index, sw_if_index0, 1); break; case NAT_PROTOCOL_ICMP: vlib_increment_simple_counter (&sm->counters.fastpath.in2out.icmp, thread_index, sw_if_index0, 1); break; case NAT_PROTOCOL_OTHER: vlib_increment_simple_counter (&sm->counters.fastpath.in2out.other, thread_index, sw_if_index0, 1); break; } /* Accounting */ nat44_session_update_counters (s0, now, vlib_buffer_length_in_chain (vm, b0), thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s0, thread_index); trace0: if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { nat_in2out_ed_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->sw_if_index = sw_if_index0; t->next_index = next[0]; t->is_slow_path = 0; t->translation_error = translation_error; t->lookup_skipped = lookup_skipped; clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key)); if (s0) { t->session_index = s0 - tsm->sessions; clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of)); clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if)); t->translation_via_i2of = (&s0->i2o == f); } else { t->session_index = ~0; } } if (next[0] == NAT_NEXT_DROP) { vlib_increment_simple_counter (&sm->counters.fastpath.in2out.drops, thread_index, sw_if_index0, 1); } n_left_from--; next++; } vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, frame->n_vectors); return frame->n_vectors; } static inline uword nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, int is_output_feature) { u32 n_left_from, *from; snat_main_t *sm = &snat_main; f64 now = vlib_time_now (vm); u32 thread_index = vm->thread_index; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; u16 nexts[VLIB_FRAME_SIZE], *next = nexts; vlib_get_buffers (vm, from, b, n_left_from); while (n_left_from > 0) { vlib_buffer_t *b0; u32 sw_if_index0, rx_fib_index0, iph_offset0 = 0; nat_protocol_t proto0; ip4_header_t *ip0; udp_header_t *udp0; icmp46_header_t *icmp0; snat_session_t *s0 = 0; clib_bihash_kv_16_8_t kv0, value0; int translation_error = NAT_ED_TRNSL_ERR_SUCCESS; b0 = *b; if (is_output_feature) iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; next[0] = vnet_buffer2 (b0)->nat.arc_next; ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0); if (PREDICT_FALSE (ip0->ttl == 1)) { vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, ICMP4_time_exceeded_ttl_exceeded_in_transit, 0); next[0] = NAT_NEXT_ICMP_ERROR; goto trace0; } udp0 = ip4_next_header (ip0); icmp0 = (icmp46_header_t *) udp0; proto0 = ip_proto_to_nat_proto (ip0->protocol); if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) { s0 = nat44_ed_in2out_slowpath_unknown_proto ( sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node); if (!s0) next[0] = NAT_NEXT_DROP; if (NAT_ED_TRNSL_ERR_SUCCESS != (translation_error = nat_6t_flow_buf_translate ( sm, b0, ip0, &s0->i2o, proto0, is_output_feature))) { goto trace0; } vlib_increment_simple_counter (&sm->counters.slowpath.in2out.other, thread_index, sw_if_index0, 1); goto trace0; } if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) { next[0] = icmp_in2out_ed_slow_path (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, next[0], now, thread_index, proto0, &s0); if (NAT_NEXT_DROP != next[0] && s0 && NAT_ED_TRNSL_ERR_SUCCESS != (translation_error = nat_6t_flow_buf_translate ( sm, b0, ip0, &s0->i2o, proto0, is_output_feature))) { goto trace0; } vlib_increment_simple_counter (&sm->counters.slowpath.in2out.icmp, thread_index, sw_if_index0, 1); goto trace0; } init_ed_k (&kv0, ip0->src_address, vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address, vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, ip0->protocol); if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0)) { ASSERT (thread_index == ed_value_get_thread_index (&value0)); s0 = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value0)); if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp) { nat_free_session_data (sm, s0, thread_index, 0); nat_ed_session_delete (sm, s0, thread_index, 1); s0 = NULL; } } if (!s0) { if (is_output_feature) { if (PREDICT_FALSE (nat44_ed_not_translate_output_feature (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port, vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index, sw_if_index0, vnet_buffer (b0)->sw_if_index[VLIB_TX], now))) goto trace0; /* * Send DHCP packets to the ipv4 stack, or we won't * be able to use dhcp client on the outside interface */ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_UDP && (vnet_buffer (b0)->ip.reass.l4_dst_port == clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server)) && ip0->dst_address.as_u32 == 0xffffffff)) goto trace0; } else { if (PREDICT_FALSE (nat44_ed_not_translate ( sm, node, sw_if_index0, b0, ip0, proto0, rx_fib_index0, thread_index))) goto trace0; } next[0] = slow_path_ed (sm, b0, ip0->src_address, ip0->dst_address, vnet_buffer (b0)->ip.reass.l4_src_port, vnet_buffer (b0)->ip.reass.l4_dst_port, ip0->protocol, rx_fib_index0, &s0, node, next[0], thread_index, now); if (PREDICT_FALSE (next[0] == NAT_NEXT_DROP)) goto trace0; if (PREDICT_FALSE (!s0)) goto trace0; } b0->flags |= VNET_BUFFER_F_IS_NATED; if (NAT_ED_TRNSL_ERR_SUCCESS != (translation_error = nat_6t_flow_buf_translate ( sm, b0, ip0, &s0->i2o, proto0, is_output_feature))) { nat_free_session_data (sm, s0, thread_index, 0); nat_ed_session_delete (sm, s0, thread_index, 1); s0 = NULL; goto trace0; } if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) { vlib_increment_simple_counter (&sm->counters.slowpath.in2out.tcp, thread_index, sw_if_index0, 1); nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index); } else { vlib_increment_simple_counter (&sm->counters.slowpath.in2out.udp, thread_index, sw_if_index0, 1); } /* Accounting */ nat44_session_update_counters (s0, now, vlib_buffer_length_in_chain (vm, b0), thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s0, thread_index); trace0: if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { nat_in2out_ed_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->sw_if_index = sw_if_index0; t->next_index = next[0]; t->is_slow_path = 1; t->translation_error = translation_error; clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key)); if (s0) { t->session_index = s0 - tsm->sessions; clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of)); clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if)); t->translation_via_i2of = 1; } else { t->session_index = ~0; } } if (next[0] == NAT_NEXT_DROP) { vlib_increment_simple_counter (&sm->counters.slowpath.in2out.drops, thread_index, sw_if_index0, 1); } n_left_from--; next++; b++; } vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, frame->n_vectors); return frame->n_vectors; } VLIB_NODE_FN (nat44_ed_in2out_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { if (snat_main.num_workers > 1) { return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0, 1); } else { return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0, 0); } } VLIB_REGISTER_NODE (nat44_ed_in2out_node) = { .name = "nat44-ed-in2out", .vector_size = sizeof (u32), .sibling_of = "nat-default", .format_trace = format_nat_in2out_ed_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings), .error_strings = nat_in2out_ed_error_strings, .runtime_data_bytes = sizeof (snat_runtime_t), }; VLIB_NODE_FN (nat44_ed_in2out_output_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { if (snat_main.num_workers > 1) { return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1, 1); } else { return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1, 0); } } VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = { .name = "nat44-ed-in2out-output", .vector_size = sizeof (u32), .sibling_of = "nat-default", .format_trace = format_nat_in2out_ed_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings), .error_strings = nat_in2out_ed_error_strings, .runtime_data_bytes = sizeof (snat_runtime_t), }; VLIB_NODE_FN (nat44_ed_in2out_slowpath_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0); } VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = { .name = "nat44-ed-in2out-slowpath", .vector_size = sizeof (u32), .sibling_of = "nat-default", .format_trace = format_nat_in2out_ed_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings), .error_strings = nat_in2out_ed_error_strings, .runtime_data_bytes = sizeof (snat_runtime_t), }; VLIB_NODE_FN (nat44_ed_in2out_output_slowpath_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1); } VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = { .name = "nat44-ed-in2out-output-slowpath", .vector_size = sizeof (u32), .sibling_of = "nat-default", .format_trace = format_nat_in2out_ed_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings), .error_strings = nat_in2out_ed_error_strings, .runtime_data_bytes = sizeof (snat_runtime_t), }; static u8 * format_nat_pre_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *); return format (s, "in2out next_index %d arc_next_index %d", t->next_index, t->arc_next_index); } VLIB_NODE_FN (nat_pre_in2out_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return nat_pre_node_fn_inline (vm, node, frame, NAT_NEXT_IN2OUT_ED_FAST_PATH); } VLIB_NODE_FN (nat_pre_in2out_output_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return nat_pre_node_fn_inline (vm, node, frame, NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH); } VLIB_REGISTER_NODE (nat_pre_in2out_node) = { .name = "nat-pre-in2out", .vector_size = sizeof (u32), .sibling_of = "nat-default", .format_trace = format_nat_pre_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = 0, }; VLIB_REGISTER_NODE (nat_pre_in2out_output_node) = { .name = "nat-pre-in2out-output", .vector_size = sizeof (u32), .sibling_of = "nat-default", .format_trace = format_nat_pre_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = 0, }; /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */