diff options
Diffstat (limited to 'src/plugins/nat/nat44-ed/nat44_ed_in2out.c')
| -rw-r--r-- | src/plugins/nat/nat44-ed/nat44_ed_in2out.c | 1579 |
1 files changed, 1579 insertions, 0 deletions
diff --git a/src/plugins/nat/nat44-ed/nat44_ed_in2out.c b/src/plugins/nat/nat44-ed/nat44_ed_in2out.c new file mode 100644 index 00000000000..784dea0faf6 --- /dev/null +++ b/src/plugins/nat/nat44-ed/nat44_ed_in2out.c @@ -0,0 +1,1579 @@ +/* + * 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 <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/ip/ip.h> +#include <vnet/ethernet/ethernet.h> +#include <vnet/fib/ip4_fib.h> +#include <vnet/udp/udp_local.h> +#include <vppinfra/error.h> + +#include <nat/lib/nat_syslog.h> +#include <nat/lib/nat_inlines.h> +#include <nat/lib/ipfix_logging.h> + +#include <nat/nat44-ed/nat44_ed.h> +#include <nat/nat44-ed/nat44_ed_inlines.h> + +/* 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 (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) +{ + int i; + snat_address_t *a, *ga = 0; + + 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) \ + { \ + 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)) \ + { \ + ++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 (sm, "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 (sm, "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 + 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, daddr, dport, proto, + 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, 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->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, 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) + { + 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, 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) +{ + 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; + ip4_address_t lookup_saddr, lookup_daddr; + u16 lookup_sport, lookup_dport; + u8 lookup_protocol; + 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); + + 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_protocol); + if (err != 0) + { + b0->error = node->errors[err]; + next[0] = NAT_NEXT_DROP; + goto trace0; + } + } + else + { + lookup_protocol = ip0->protocol; + lookup_saddr = ip0->src_address; + lookup_daddr = ip0->dst_address; + 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 (!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_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, lookup_protocol, + rx_fib_index0) + // 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_flow_match ( + &s0->o2i, b0, lookup_saddr, lookup_sport, lookup_daddr, + lookup_dport, lookup_protocol, rx_fib_index0)))) + { + /* yes, this is the droid we're looking for */ + lookup_skipped = 1; + goto skip_lookup; + } + s0 = NULL; + } + + init_ed_k (&kv0, ip0->src_address, lookup_sport, ip0->dst_address, + lookup_dport, rx_fib_index0, lookup_protocol); + + // 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_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, lookup_protocol, + rx_fib_index0)) + { + f = &s0->i2o; + } + else if (s0->flags & SNAT_SESSION_FLAG_HAIRPINNING && + nat_6t_flow_match (&s0->o2i, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, lookup_protocol, + rx_fib_index0)) + { + 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, 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) +{ + return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 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) +{ + return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1); +} + +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: + */ |