/* * 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 #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; u32 is_slow_path; } 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); return s; } #ifndef CLIB_MARCH_VARIANT int nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg) { snat_main_t *sm = &snat_main; nat44_is_idle_session_ctx_t *ctx = arg; snat_session_t *s; u64 sess_timeout_time; u8 proto; u16 r_port, l_port; ip4_address_t *l_addr, *r_addr; u32 fib_index; clib_bihash_kv_16_8_t ed_kv; int i; snat_address_t *a; snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data, ctx->thread_index); ASSERT (ctx->thread_index == ed_value_get_thread_index (kv)); s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (kv)); sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s); if (ctx->now >= sess_timeout_time) { if (is_fwd_bypass_session (s)) goto delete; l_addr = &s->out2in.addr; r_addr = &s->ext_host_addr; fib_index = s->out2in.fib_index; if (snat_is_unk_proto_session (s)) { proto = s->in2out.port; r_port = 0; l_port = 0; } else { proto = nat_proto_to_ip_proto (s->nat_proto); l_port = s->out2in.port; r_port = s->ext_host_port; } init_ed_k (&ed_kv, *l_addr, l_port, *r_addr, r_port, fib_index, proto); if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &ed_kv, 0)) nat_elog_warn ("out2in_ed key del failed"); if (snat_is_unk_proto_session (s)) goto delete; nat_ipfix_logging_nat44_ses_delete (ctx->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_sdel (s->user_index, 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, is_twice_nat_session (s)); nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr, s->ext_host_port, s->nat_proto, s->out2in.fib_index, ctx->thread_index); if (is_twice_nat_session (s)) { for (i = 0; i < vec_len (sm->twice_nat_addresses); i++) { // TODO FIXME this is obviously broken - which address should be // freed here?! a = sm->twice_nat_addresses + i; if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32) { snat_free_outside_address_and_port (sm->twice_nat_addresses, ctx->thread_index, &s->ext_host_nat_addr, s->ext_host_nat_port, s->nat_proto); break; } } } if (snat_is_session_static (s)) goto delete; snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, &s->out2in.addr, s->out2in.port, s->nat_proto); delete: nat_ed_session_delete (sm, s, ctx->thread_index, 1); return 1; } return 0; } #endif static inline u32 icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0, ip4_header_t * ip0, icmp46_header_t * icmp0, u32 sw_if_index0, u32 rx_fib_index0, vlib_node_runtime_t * node, u32 next0, f64 now, u32 thread_index, snat_session_t ** p_s0) { vlib_main_t *vm = vlib_get_main (); next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, next0, thread_index, p_s0, 0); snat_session_t *s0 = *p_s0; if (PREDICT_TRUE (next0 != NAT_NEXT_DROP && s0)) { /* 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); } return next0; } 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 r_addr, u16 r_port, u8 proto, u16 port_per_thread, u32 snat_thread_index, snat_session_t * s, ip4_address_t * outside_addr, u16 * outside_port, clib_bihash_kv_16_8_t * out2in_ed_kv) { int i; snat_address_t *a, *ga = 0; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; const u16 port_thread_offset = (port_per_thread * snat_thread_index) + 1024; for (i = 0; i < vec_len (sm->addresses); i++) { a = sm->addresses + i; switch (nat_proto) { #define _(N, j, n, unused) \ case NAT_PROTOCOL_##N: \ if (a->fib_index == rx_fib_index) \ { \ /* 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 \ { \ init_ed_kv (out2in_ed_kv, a->addr, clib_host_to_net_u16 (port), \ r_addr, r_port, s->out2in.fib_index, proto, \ thread_index, s - tsm->sessions); \ int rv = clib_bihash_add_del_16_8 (&sm->out2in_ed, out2in_ed_kv, \ 2 /* is_add */); \ if (0 == rv) \ { \ ++a->busy_##n##_port_refcounts[port]; \ a->busy_##n##_ports_per_thread[thread_index]++; \ a->busy_##n##_ports++; \ *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); \ } \ else if (a->fib_index == ~0) \ { \ ga = a; \ } \ break; foreach_nat_protocol; default: nat_elog_info ("unknown protocol"); return 1; } } if (ga) { /* fake fib_index to reuse macro */ rx_fib_index = ~0; a = ga; switch (nat_proto) { foreach_nat_protocol; default: nat_elog_info ("unknown protocol"); return 1; } } #undef _ /* 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 /* *INDENT-OFF* */ 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; } } } /* *INDENT-ON* */ return ~0; } 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]; clib_bihash_kv_16_8_t out2in_ed_kv; nat44_is_idle_session_ctx_t ctx; ip4_address_t outside_addr; u16 outside_port; u8 identity_nat; u32 nat_proto = ip_proto_to_nat_proto (proto); snat_session_t *s = NULL; lb_nat_type_t lb = 0; 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 ("maximum sessions exceeded"); return NAT_NEXT_DROP; } } ip4_address_t sm_addr; u16 sm_port; u32 sm_fib_index; /* First try to match static mapping by local address and port */ 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, &identity_nat, 0)) { s = nat_ed_session_alloc (sm, thread_index, now, proto); ASSERT (s); 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 = sm->outside_fib_index; switch (vec_len (sm->outside_fibs)) { case 0: s->out2in.fib_index = sm->outside_fib_index; break; case 1: s->out2in.fib_index = sm->outside_fibs[0].fib_index; break; default: s->out2in.fib_index = nat_outside_fib_index_lookup (sm, r_addr); break; } /* Try to create dynamic translation */ outside_port = l_port; // suggest using local port to allocation function if (nat_ed_alloc_addr_and_port (sm, rx_fib_index, nat_proto, thread_index, r_addr, r_port, proto, sm->port_per_thread, tsm->snat_thread_index, s, &outside_addr, &outside_port, &out2in_ed_kv)) { nat_elog_notice ("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 { if (PREDICT_FALSE (identity_nat)) { *sessionp = NULL; return next; } s = nat_ed_session_alloc (sm, thread_index, now, proto); ASSERT (s); s->out2in.addr = sm_addr; s->out2in.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 = sm->outside_fib_index; switch (vec_len (sm->outside_fibs)) { case 0: s->out2in.fib_index = sm->outside_fib_index; break; case 1: s->out2in.fib_index = sm->outside_fibs[0].fib_index; break; default: s->out2in.fib_index = nat_outside_fib_index_lookup (sm, r_addr); break; } s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; init_ed_kv (&out2in_ed_kv, sm_addr, sm_port, r_addr, r_port, s->out2in.fib_index, proto, thread_index, s - tsm->sessions); if (clib_bihash_add_or_overwrite_stale_16_8 (&sm->out2in_ed, &out2in_ed_kv, nat44_o2i_ed_is_idle_session_cb, &ctx)) nat_elog_notice ("out2in-ed key add failed"); } 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; clib_bihash_kv_16_8_t in2out_ed_kv; init_ed_kv (&in2out_ed_kv, l_addr, l_port, r_addr, r_port, rx_fib_index, proto, thread_index, s - tsm->sessions); ctx.now = now; ctx.thread_index = thread_index; if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &in2out_ed_kv, nat44_i2o_ed_is_idle_session_cb, &ctx)) nat_elog_notice ("in2out-ed key add failed"); *sessionp = s; /* 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 (s->user_index, 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); nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr, s->out2in.port, &s->ext_host_addr, s->ext_host_port, &s->ext_host_nat_addr, s->ext_host_nat_port, s->nat_proto, s->in2out.fib_index, s->flags, thread_index, 0); per_vrf_sessions_register_session (s, thread_index); return next; } static_always_inline int nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node, u32 sw_if_index, ip4_header_t * ip, u32 proto, u32 rx_fib_index, u32 thread_index) { udp_header_t *udp = ip4_next_header (ip); clib_bihash_kv_16_8_t kv, value; init_ed_k (&kv, ip->dst_address, udp->dst_port, ip->src_address, udp->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->out2in_ed, &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, udp->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) { if (get_icmp_i2o_ed_key (b, ip, 0, ~0, ~0, 0, 0, 0, &kv)) return 0; } 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 (&tsm->in2out_ed, &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) { if (nat44_set_tcp_session_state_i2o (sm, now, s, b, thread_index)) return 1; } /* 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) { 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->out2in_ed, &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)) { nat_free_session_data (sm, s, thread_index, 0); nat_ed_session_delete (sm, s, thread_index, 1); } else s->flags |= SNAT_SESSION_FLAG_OUTPUT_FEATURE; 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 (&tsm->in2out_ed, &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 */ /* *INDENT-OFF* */ pool_foreach (i, sm->output_feature_interfaces, ({ if ((nat_interface_is_inside (i)) && (rx_sw_if_index == i->sw_if_index)) return 0; })); /* *INDENT-ON* */ return 1; } return 0; } #ifndef CLIB_MARCH_VARIANT u32 icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node, u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip, ip4_address_t * addr, u16 * port, u32 * fib_index, nat_protocol_t * proto, void *d, void *e, u8 * dont_translate) { u32 sw_if_index; u32 rx_fib_index; clib_bihash_kv_16_8_t kv, value; u32 next = ~0; int err; snat_session_t *s = NULL; u16 l_port = 0, r_port = 0; // initialize to workaround gcc warning vlib_main_t *vm = vlib_get_main (); snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; *dont_translate = 0; sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); err = get_icmp_i2o_ed_key (b, ip, rx_fib_index, ~0, ~0, proto, &l_port, &r_port, &kv); if (err != 0) { b->error = node->errors[err]; next = NAT_NEXT_DROP; goto out; } if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) { if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0) { if (PREDICT_FALSE (nat44_ed_not_translate_output_feature (sm, ip, l_port, r_port, thread_index, sw_if_index, vnet_buffer (b)->sw_if_index[VLIB_TX]))) { *dont_translate = 1; goto out; } } else { if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index, ip, NAT_PROTOCOL_ICMP, rx_fib_index, thread_index))) { *dont_translate = 1; goto out; } } 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]; next = NAT_NEXT_DROP; goto out; } next = slow_path_ed (sm, b, ip->src_address, ip->dst_address, l_port, r_port, ip->protocol, rx_fib_index, &s, node, next, thread_index, vlib_time_now (vm)); if (PREDICT_FALSE (next == NAT_NEXT_DROP)) goto out; if (!s) { *dont_translate = 1; goto out; } } else { if (PREDICT_FALSE (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != ICMP4_echo_request && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != ICMP4_echo_reply && !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]; next = NAT_NEXT_DROP; goto out; } ASSERT (thread_index == ed_value_get_thread_index (&value)); s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value)); } out: if (s) { *addr = s->out2in.addr; *port = s->out2in.port; *fib_index = s->out2in.fib_index; } if (d) { *(snat_session_t **) d = s; } return next; } #endif static snat_session_t * nat44_ed_in2out_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; u32 old_addr, new_addr = 0; ip_csum_t sum; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; snat_session_t *s; u32 outside_fib_index = sm->outside_fib_index; int i; u8 is_sm = 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; } old_addr = ip->src_address.as_u32; init_ed_k (&s_kv, ip->src_address, 0, ip->dst_address, 0, rx_fib_index, ip->protocol); if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value)) { ASSERT (thread_index == ed_value_get_thread_index (&s_value)); s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&s_value)); new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32; } else { 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 ("maximum sessions exceeded"); return 0; } 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_addr = ip->src_address.as_u32 = m->external_addr.as_u32; is_sm = 1; goto create_ses; } else { /* *INDENT-OFF* */ pool_foreach (s, tsm->sessions, { if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32) { new_addr = ip->src_address.as_u32 = s->out2in.addr.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->out2in_ed, &s_kv, &s_value)) goto create_ses; break; } }); /* *INDENT-ON* */ 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->out2in_ed, &s_kv, &s_value)) { new_addr = ip->src_address.as_u32 = sm->addresses[i].addr.as_u32; goto create_ses; } } return 0; } create_ses: 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 ("create NAT session failed"); return 0; } 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_addr; s->out2in.fib_index = outside_fib_index; s->in2out.addr.as_u32 = old_addr; s->in2out.fib_index = rx_fib_index; s->in2out.port = s->out2in.port = ip->protocol; if (is_sm) s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; /* Add to lookup tables */ init_ed_kv (&s_kv, s->in2out.addr, 0, ip->dst_address, 0, rx_fib_index, ip->protocol, thread_index, s - tsm->sessions); if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1)) nat_elog_notice ("in2out key add failed"); init_ed_kv (&s_kv, s->out2in.addr, 0, ip->dst_address, 0, outside_fib_index, ip->protocol, thread_index, s - tsm->sessions); if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1)) nat_elog_notice ("out2in key add failed"); per_vrf_sessions_register_session (s, thread_index); } /* Update IP checksum */ sum = ip->checksum; sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address); ip->checksum = ip_csum_fold (sum); /* 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); /* Hairpinning */ if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0) nat44_ed_hairpinning_unknown_proto (sm, b, ip); if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0) vnet_buffer (b)->sw_if_index[VLIB_TX] = outside_fib_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) { 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, proto0, new_addr0, old_addr0, iph_offset0 = 0; u16 old_port0, new_port0; ip4_header_t *ip0; udp_header_t *udp0; tcp_header_t *tcp0; snat_session_t *s0 = 0; clib_bihash_kv_16_8_t kv0, value0; ip_csum_t sum0; 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); 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); tcp0 = (tcp_header_t *) udp0; proto0 = ip_proto_to_nat_proto (ip0->protocol); if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) { next[0] = def_slow; goto trace0; } 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)) { next[0] = def_slow; 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); // lookup for session if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0)) { // session 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)); 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 (!is_output_feature) vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; old_addr0 = ip0->src_address.as_u32; new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32; sum0 = ip0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, src_address); if (PREDICT_FALSE (is_twice_nat_session (s0))) sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, s0->ext_host_addr.as_u32, ip4_header_t, dst_address); ip0->checksum = ip_csum_fold (sum0); old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port; if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) { if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { new_port0 = udp0->src_port = s0->out2in.port; sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address); sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, length); if (PREDICT_FALSE (is_twice_nat_session (s0))) { sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, s0->ext_host_addr.as_u32, ip4_header_t, dst_address); sum0 = ip_csum_update (sum0, vnet_buffer (b0)->ip.reass.l4_dst_port, s0->ext_host_port, ip4_header_t, length); tcp0->dst_port = s0->ext_host_port; ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } mss_clamping (sm->mss_clamping, tcp0, &sum0); tcp0->checksum = ip_csum_fold (sum0); } vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.tcp, thread_index, sw_if_index0, 1); if (nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index)) goto trace0; } else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment && udp0->checksum) { new_port0 = udp0->src_port = s0->out2in.port; sum0 = udp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address); sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, length); if (PREDICT_FALSE (is_twice_nat_session (s0))) { sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, s0->ext_host_addr.as_u32, ip4_header_t, dst_address); sum0 = ip_csum_update (sum0, vnet_buffer (b0)->ip.reass.l4_dst_port, s0->ext_host_port, ip4_header_t, length); udp0->dst_port = s0->ext_host_port; ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } udp0->checksum = ip_csum_fold (sum0); vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.udp, thread_index, sw_if_index0, 1); } else { if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { new_port0 = udp0->src_port = s0->out2in.port; if (PREDICT_FALSE (is_twice_nat_session (s0))) { udp0->dst_port = s0->ext_host_port; ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } vlib_increment_simple_counter (&sm->counters.fastpath. in2out_ed.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 = 0; if (s0) t->session_index = s0 - tsm->sessions; else t->session_index = ~0; } if (next[0] == NAT_NEXT_DROP) { vlib_increment_simple_counter (&sm->counters.fastpath. in2out_ed.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, proto0, new_addr0, old_addr0, iph_offset0 = 0; u16 old_port0, new_port0; ip4_header_t *ip0; udp_header_t *udp0; tcp_header_t *tcp0; icmp46_header_t *icmp0; snat_session_t *s0 = 0; clib_bihash_kv_16_8_t kv0, value0; ip_csum_t sum0; 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); tcp0 = (tcp_header_t *) udp0; icmp0 = (icmp46_header_t *) udp0; proto0 = ip_proto_to_nat_proto (ip0->protocol); if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) { s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node); if (!s0) next[0] = NAT_NEXT_DROP; vlib_increment_simple_counter (&sm->counters.slowpath. in2out_ed.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, &s0); vlib_increment_simple_counter (&sm->counters.slowpath. in2out_ed.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 (&tsm->in2out_ed, &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]))) 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, 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 (!is_output_feature) vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; old_addr0 = ip0->src_address.as_u32; new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32; sum0 = ip0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, src_address); if (PREDICT_FALSE (is_twice_nat_session (s0))) sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, s0->ext_host_addr.as_u32, ip4_header_t, dst_address); ip0->checksum = ip_csum_fold (sum0); old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port; if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) { if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { new_port0 = udp0->src_port = s0->out2in.port; sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address); sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, length); if (PREDICT_FALSE (is_twice_nat_session (s0))) { sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, s0->ext_host_addr.as_u32, ip4_header_t, dst_address); sum0 = ip_csum_update (sum0, vnet_buffer (b0)->ip.reass.l4_dst_port, s0->ext_host_port, ip4_header_t, length); tcp0->dst_port = s0->ext_host_port; ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } mss_clamping (sm->mss_clamping, tcp0, &sum0); tcp0->checksum = ip_csum_fold (sum0); } vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.tcp, thread_index, sw_if_index0, 1); if (nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index)) goto trace0; } else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment && udp0->checksum) { new_port0 = udp0->src_port = s0->out2in.port; sum0 = udp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address); sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, length); if (PREDICT_FALSE (is_twice_nat_session (s0))) { sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, s0->ext_host_addr.as_u32, ip4_header_t, dst_address); sum0 = ip_csum_update (sum0, vnet_buffer (b0)->ip.reass.l4_dst_port, s0->ext_host_port, ip4_header_t, length); udp0->dst_port = s0->ext_host_port; ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } udp0->checksum = ip_csum_fold (sum0); vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.udp, thread_index, sw_if_index0, 1); } else { if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { new_port0 = udp0->src_port = s0->out2in.port; if (PREDICT_FALSE (is_twice_nat_session (s0))) { udp0->dst_port = s0->ext_host_port; ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } vlib_increment_simple_counter (&sm->counters.slowpath. in2out_ed.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; if (s0) t->session_index = s0 - tsm->sessions; else t->session_index = ~0; } if (next[0] == NAT_NEXT_DROP) { vlib_increment_simple_counter (&sm->counters.slowpath. in2out_ed.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) { return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0); } /* *INDENT-OFF* */ 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), }; /* *INDENT-ON* */ VLIB_NODE_FN (nat44_ed_in2out_output_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1); } /* *INDENT-OFF* */ 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), }; /* *INDENT-ON* */ 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); } /* *INDENT-OFF* */ 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), }; /* *INDENT-ON* */ 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); } /* *INDENT-OFF* */ 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), }; /* *INDENT-ON* */ 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); } /* *INDENT-OFF* */ 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, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */