diff options
Diffstat (limited to 'src/plugins/nat/nat44-ed/nat44_ed_out2in.c')
| -rw-r--r-- | src/plugins/nat/nat44-ed/nat44_ed_out2in.c | 1443 |
1 files changed, 1443 insertions, 0 deletions
diff --git a/src/plugins/nat/nat44-ed/nat44_ed_out2in.c b/src/plugins/nat/nat44-ed/nat44_ed_out2in.c new file mode 100644 index 00000000000..4d354d3e8ec --- /dev/null +++ b/src/plugins/nat/nat44-ed/nat44_ed_out2in.c @@ -0,0 +1,1443 @@ +/* + * 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 outside to inside 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/ipfix_logging.h> + +#include <nat/nat44-ed/nat44_ed.h> +#include <nat/nat44-ed/nat44_ed_inlines.h> + +static char *nat_out2in_ed_error_strings[] = { +#define _(sym,string) string, + foreach_nat_out2in_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; +} nat44_ed_out2in_trace_t; + +static u8 * +format_nat44_ed_out2in_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 *); + nat44_ed_out2in_trace_t *t = va_arg (*args, nat44_ed_out2in_trace_t *); + char *tag; + + tag = + t->is_slow_path ? "NAT44_OUT2IN_ED_SLOW_PATH" : + "NAT44_OUT2IN_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; +} + +static int +next_src_nat (snat_main_t *sm, ip4_header_t *ip, u16 src_port, u16 dst_port, + u32 thread_index, u32 rx_fib_index) +{ + clib_bihash_kv_16_8_t kv, value; + + init_ed_k (&kv, ip->src_address, src_port, ip->dst_address, dst_port, + rx_fib_index, ip->protocol); + if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) + return 1; + + return 0; +} + +static void create_bypass_for_fwd (snat_main_t *sm, vlib_buffer_t *b, + snat_session_t *s, ip4_header_t *ip, + u32 rx_fib_index, u32 thread_index); + +static snat_session_t *create_session_for_static_mapping_ed ( + snat_main_t *sm, vlib_buffer_t *b, ip4_address_t i2o_addr, u16 i2o_port, + u32 i2o_fib_index, ip4_address_t o2i_addr, u16 o2i_port, u32 o2i_fib_index, + nat_protocol_t nat_proto, vlib_node_runtime_t *node, u32 rx_fib_index, + u32 thread_index, twice_nat_type_t twice_nat, lb_nat_type_t lb_nat, f64 now, + snat_static_mapping_t *mapping); + +static inline u32 +icmp_out2in_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, + snat_session_t **s_p) +{ + vlib_main_t *vm = vlib_get_main (); + + ip_csum_t sum; + u16 checksum; + + snat_session_t *s = 0; + u8 is_addr_only, identity_nat; + ip4_address_t sm_addr; + u16 sm_port; + u32 sm_fib_index; + snat_static_mapping_t *m; + u8 lookup_protocol; + ip4_address_t lookup_saddr, lookup_daddr; + u16 lookup_sport, lookup_dport; + + 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); + + if (nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr, &lookup_sport, + &lookup_daddr, &lookup_dport, + &lookup_protocol)) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_UNSUPPORTED_PROTOCOL]; + next = NAT_NEXT_DROP; + goto out; + } + + if (snat_static_mapping_match ( + sm, ip->dst_address, lookup_sport, rx_fib_index, + ip_proto_to_nat_proto (ip->protocol), &sm_addr, &sm_port, + &sm_fib_index, 1, &is_addr_only, 0, 0, 0, &identity_nat, &m)) + { + // static mapping not matched + if (!sm->forwarding_enabled) + { + /* Don't NAT packet aimed at the intfc address */ + if (!is_interface_addr (sm, node, sw_if_index, + ip->dst_address.as_u32)) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; + next = NAT_NEXT_DROP; + } + } + else + { + if (next_src_nat (sm, ip, lookup_sport, lookup_dport, thread_index, + rx_fib_index)) + { + next = NAT_NEXT_IN2OUT_ED_FAST_PATH; + } + else + { + create_bypass_for_fwd (sm, b, s, ip, rx_fib_index, thread_index); + } + } + goto out; + } + + if (PREDICT_FALSE (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_reply && + (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_request || + !is_addr_only))) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE]; + next = NAT_NEXT_DROP; + goto out; + } + + if (PREDICT_FALSE (identity_nat)) + { + goto out; + } + + /* Create session initiated by host from external network */ + s = create_session_for_static_mapping_ed ( + sm, b, sm_addr, sm_port, sm_fib_index, ip->dst_address, lookup_sport, + rx_fib_index, ip_proto_to_nat_proto (lookup_protocol), node, rx_fib_index, + thread_index, 0, 0, vlib_time_now (vm), m); + if (!s) + next = NAT_NEXT_DROP; + + if (PREDICT_TRUE (!ip4_is_fragment (ip))) + { + 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 (checksum != 0 && checksum != 0xffff) + { + next = NAT_NEXT_DROP; + goto 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); + } +out: + if (NAT_NEXT_DROP == next && s) + { + nat_ed_session_delete (sm, s, thread_index, 1); + s = 0; + } + *s_p = s; + return next; +} + +// allocate exact address based on preference +static_always_inline int +nat_alloc_addr_and_port_exact (snat_address_t * a, + u32 thread_index, + nat_protocol_t proto, + ip4_address_t * addr, + u16 * port, + u16 port_per_thread, u32 snat_thread_index) +{ + snat_main_t *sm = &snat_main; + u32 portnum; + + switch (proto) + { +#define _(N, j, n, s) \ + case NAT_PROTOCOL_##N: \ + if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \ + { \ + while (1) \ + { \ + portnum = (port_per_thread * \ + snat_thread_index) + \ + snat_random_port(0, port_per_thread - 1) + 1024; \ + if (a->busy_##n##_port_refcounts[portnum]) \ + continue; \ + --a->busy_##n##_port_refcounts[portnum]; \ + a->busy_##n##_ports_per_thread[thread_index]++; \ + a->busy_##n##_ports++; \ + *addr = a->addr; \ + *port = clib_host_to_net_u16(portnum); \ + return 0; \ + } \ + } \ + break; + foreach_nat_protocol +#undef _ + default : nat_elog_info (sm, "unknown protocol"); + return 1; + } + + /* Totally out of translations to use... */ + nat_ipfix_logging_addresses_exhausted (thread_index, 0); + return 1; +} + +static_always_inline int +nat44_ed_alloc_outside_addr_and_port (snat_address_t *addresses, u32 fib_index, + u32 thread_index, nat_protocol_t proto, + ip4_address_t *addr, u16 *port, + u16 port_per_thread, + u32 snat_thread_index) +{ + snat_main_t *sm = &snat_main; + snat_address_t *a, *ga = 0; + u32 portnum; + int i; + + for (i = 0; i < vec_len (addresses); i++) + { + a = addresses + i; + switch (proto) + { +#define _(N, j, n, s) \ + case NAT_PROTOCOL_##N: \ + if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \ + { \ + if (a->fib_index == fib_index) \ + { \ + while (1) \ + { \ + portnum = (port_per_thread * snat_thread_index) + \ + snat_random_port (0, port_per_thread - 1) + 1024; \ + if (a->busy_##n##_port_refcounts[portnum]) \ + continue; \ + --a->busy_##n##_port_refcounts[portnum]; \ + a->busy_##n##_ports_per_thread[thread_index]++; \ + a->busy_##n##_ports++; \ + *addr = a->addr; \ + *port = clib_host_to_net_u16 (portnum); \ + return 0; \ + } \ + } \ + else if (a->fib_index == ~0) \ + { \ + ga = a; \ + } \ + } \ + break; + foreach_nat_protocol +#undef _ + default : nat_elog_info (sm, "unknown protocol"); + return 1; + } + } + + if (ga) + { + a = ga; + switch (proto) + { +#define _(N, j, n, s) \ + case NAT_PROTOCOL_##N: \ + while (1) \ + { \ + portnum = (port_per_thread * snat_thread_index) + \ + snat_random_port (0, port_per_thread - 1) + 1024; \ + if (a->busy_##n##_port_refcounts[portnum]) \ + continue; \ + ++a->busy_##n##_port_refcounts[portnum]; \ + a->busy_##n##_ports_per_thread[thread_index]++; \ + a->busy_##n##_ports++; \ + *addr = a->addr; \ + *port = clib_host_to_net_u16 (portnum); \ + return 0; \ + } + break; + foreach_nat_protocol +#undef _ + default : nat_elog_info (sm, "unknown protocol"); + return 1; + } + } + + /* Totally out of translations to use... */ + nat_ipfix_logging_addresses_exhausted (thread_index, 0); + return 1; +} + +static snat_session_t * +create_session_for_static_mapping_ed ( + snat_main_t *sm, vlib_buffer_t *b, ip4_address_t i2o_addr, u16 i2o_port, + u32 i2o_fib_index, ip4_address_t o2i_addr, u16 o2i_port, u32 o2i_fib_index, + nat_protocol_t nat_proto, vlib_node_runtime_t *node, u32 rx_fib_index, + u32 thread_index, twice_nat_type_t twice_nat, lb_nat_type_t lb_nat, f64 now, + snat_static_mapping_t *mapping) +{ + snat_session_t *s; + ip4_header_t *ip; + udp_header_t *udp; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; + + if (PREDICT_FALSE + (nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index))) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED]; + nat_elog_notice (sm, "maximum sessions exceeded"); + return 0; + } + + s = nat_ed_session_alloc (sm, thread_index, now, nat_proto); + if (!s) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED]; + nat_elog_warn (sm, "create NAT session failed"); + return 0; + } + + ip = vlib_buffer_get_current (b); + udp = ip4_next_header (ip); + + s->ext_host_addr.as_u32 = ip->src_address.as_u32; + s->ext_host_port = nat_proto == NAT_PROTOCOL_ICMP ? 0 : udp->src_port; + s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; + if (lb_nat) + s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING; + if (lb_nat == AFFINITY_LB_NAT) + s->flags |= SNAT_SESSION_FLAG_AFFINITY; + s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; + s->out2in.addr = o2i_addr; + s->out2in.port = o2i_port; + s->out2in.fib_index = o2i_fib_index; + s->in2out.addr = i2o_addr; + s->in2out.port = i2o_port; + s->in2out.fib_index = i2o_fib_index; + s->nat_proto = nat_proto; + + if (NAT_PROTOCOL_ICMP == nat_proto) + { + nat_6t_o2i_flow_init (sm, thread_index, s, s->ext_host_addr, o2i_port, + o2i_addr, o2i_port, o2i_fib_index, ip->protocol); + nat_6t_flow_icmp_id_rewrite_set (&s->o2i, i2o_port); + } + else + { + nat_6t_o2i_flow_init (sm, thread_index, s, s->ext_host_addr, + s->ext_host_port, o2i_addr, o2i_port, + o2i_fib_index, ip->protocol); + nat_6t_flow_dport_rewrite_set (&s->o2i, i2o_port); + } + nat_6t_flow_daddr_rewrite_set (&s->o2i, i2o_addr.as_u32); + nat_6t_flow_txfib_rewrite_set (&s->o2i, i2o_fib_index); + + if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 1)) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_HASH_ADD_FAILED]; + nat_ed_session_delete (sm, s, thread_index, 1); + nat_elog_warn (sm, "out2in flow hash add failed"); + return 0; + } + + if (twice_nat == TWICE_NAT || (twice_nat == TWICE_NAT_SELF && + ip->src_address.as_u32 == i2o_addr.as_u32)) + { + int rc = 0; + snat_address_t *filter = 0; + + // if exact address is specified use this address + if (is_exact_address (mapping)) + { + snat_address_t *ap; + vec_foreach (ap, sm->twice_nat_addresses) + { + if (mapping->pool_addr.as_u32 == ap->addr.as_u32) + { + filter = ap; + break; + } + } + } + + if (filter) + { + rc = nat_alloc_addr_and_port_exact (filter, + thread_index, + nat_proto, + &s->ext_host_nat_addr, + &s->ext_host_nat_port, + sm->port_per_thread, + tsm->snat_thread_index); + s->flags |= SNAT_SESSION_FLAG_EXACT_ADDRESS; + } + else + { + rc = nat44_ed_alloc_outside_addr_and_port ( + sm->twice_nat_addresses, 0, thread_index, nat_proto, + &s->ext_host_nat_addr, &s->ext_host_nat_port, sm->port_per_thread, + tsm->snat_thread_index); + } + + if (rc) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_OUT_OF_PORTS]; + if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 0)) + { + nat_elog_warn (sm, "out2in flow hash del failed"); + } + snat_free_outside_address_and_port ( + sm->twice_nat_addresses, thread_index, &s->ext_host_nat_addr, + s->ext_host_nat_port, s->nat_proto); + nat_ed_session_delete (sm, s, thread_index, 1); + return 0; + } + + s->flags |= SNAT_SESSION_FLAG_TWICE_NAT; + + nat_6t_flow_saddr_rewrite_set (&s->o2i, s->ext_host_nat_addr.as_u32); + if (NAT_PROTOCOL_ICMP == nat_proto) + { + nat_6t_flow_icmp_id_rewrite_set (&s->o2i, s->ext_host_nat_port); + } + else + { + nat_6t_flow_sport_rewrite_set (&s->o2i, s->ext_host_nat_port); + } + + nat_6t_l3_l4_csum_calc (&s->o2i); + + nat_6t_i2o_flow_init (sm, thread_index, s, i2o_addr, i2o_port, + s->ext_host_nat_addr, s->ext_host_nat_port, + i2o_fib_index, ip->protocol); + nat_6t_flow_daddr_rewrite_set (&s->i2o, s->ext_host_addr.as_u32); + if (NAT_PROTOCOL_ICMP == nat_proto) + { + nat_6t_flow_icmp_id_rewrite_set (&s->i2o, s->ext_host_port); + } + else + { + nat_6t_flow_dport_rewrite_set (&s->i2o, s->ext_host_port); + } + } + else + { + if (NAT_PROTOCOL_ICMP == nat_proto) + { + nat_6t_i2o_flow_init (sm, thread_index, s, i2o_addr, i2o_port, + s->ext_host_addr, i2o_port, i2o_fib_index, + ip->protocol); + } + else + { + nat_6t_i2o_flow_init (sm, thread_index, s, i2o_addr, i2o_port, + s->ext_host_addr, s->ext_host_port, + i2o_fib_index, ip->protocol); + } + } + + nat_6t_flow_saddr_rewrite_set (&s->i2o, o2i_addr.as_u32); + if (NAT_PROTOCOL_ICMP == nat_proto) + { + nat_6t_flow_icmp_id_rewrite_set (&s->i2o, o2i_port); + } + else + { + nat_6t_flow_sport_rewrite_set (&s->i2o, o2i_port); + } + + if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1)) + { + nat_elog_notice (sm, "in2out flow hash add failed"); + if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 0)) + { + nat_elog_warn (sm, "out2in flow hash del failed"); + } + nat_ed_session_delete (sm, s, thread_index, 1); + return 0; + } + + 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, + is_twice_nat_session (s)); + + per_vrf_sessions_register_session (s, thread_index); + + return s; +} + +static void +create_bypass_for_fwd (snat_main_t *sm, vlib_buffer_t *b, snat_session_t *s, + ip4_header_t *ip, u32 rx_fib_index, u32 thread_index) +{ + clib_bihash_kv_16_8_t kv, value; + udp_header_t *udp; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; + vlib_main_t *vm = vlib_get_main (); + f64 now = vlib_time_now (vm); + u16 lookup_sport, lookup_dport; + u8 lookup_protocol; + ip4_address_t lookup_saddr, lookup_daddr; + + if (ip->protocol == IP_PROTOCOL_ICMP) + { + if (nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr, + &lookup_sport, &lookup_daddr, + &lookup_dport, &lookup_protocol)) + return; + } + else + { + if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP) + { + udp = ip4_next_header (ip); + lookup_sport = udp->dst_port; + lookup_dport = udp->src_port; + } + else + { + lookup_sport = 0; + lookup_dport = 0; + } + lookup_saddr.as_u32 = ip->dst_address.as_u32; + lookup_daddr.as_u32 = ip->src_address.as_u32; + lookup_protocol = ip->protocol; + } + + init_ed_k (&kv, lookup_saddr, lookup_sport, lookup_daddr, lookup_dport, + rx_fib_index, lookup_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)); + } + else if (ip->protocol == IP_PROTOCOL_ICMP && + icmp_type_is_error_message + (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)) + { + return; + } + else + { + u32 proto; + + if (PREDICT_FALSE + (nat44_ed_maximum_sessions_exceeded + (sm, rx_fib_index, thread_index))) + return; + + s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol); + if (!s) + { + nat_elog_warn (sm, "create NAT session failed"); + return; + } + + proto = ip_proto_to_nat_proto (ip->protocol); + + s->ext_host_addr = ip->src_address; + s->ext_host_port = lookup_dport; + s->flags |= SNAT_SESSION_FLAG_FWD_BYPASS; + s->out2in.addr = ip->dst_address; + s->out2in.port = lookup_sport; + s->nat_proto = proto; + if (proto == NAT_PROTOCOL_OTHER) + { + s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO; + s->out2in.port = ip->protocol; + } + s->out2in.fib_index = rx_fib_index; + s->in2out.addr = s->out2in.addr; + s->in2out.port = s->out2in.port; + s->in2out.fib_index = s->out2in.fib_index; + + nat_6t_i2o_flow_init (sm, thread_index, s, ip->dst_address, lookup_sport, + ip->src_address, lookup_dport, rx_fib_index, + ip->protocol); + nat_6t_flow_txfib_rewrite_set (&s->i2o, rx_fib_index); + if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1)) + { + nat_elog_notice (sm, "in2out flow add failed"); + nat_ed_session_delete (sm, s, thread_index, 1); + return; + } + + per_vrf_sessions_register_session (s, thread_index); + } + + if (ip->protocol == IP_PROTOCOL_TCP) + { + tcp_header_t *tcp = ip4_next_header (ip); + nat44_set_tcp_session_state_o2i (sm, now, s, tcp->flags, + tcp->ack_number, tcp->seq_number, + thread_index); + } + + /* Accounting */ + nat44_session_update_counters (s, now, 0, thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s, thread_index); +} + +static snat_session_t * +nat44_ed_out2in_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; + snat_static_mapping_t *m; + snat_session_t *s; + + if (PREDICT_FALSE ( + nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index))) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED]; + nat_elog_notice (sm, "maximum sessions exceeded"); + return 0; + } + + init_nat_k (&kv, ip->dst_address, 0, 0, 0); + if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; + return 0; + } + + m = pool_elt_at_index (sm->static_mappings, value.value); + + /* Create a new session */ + s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol); + if (!s) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED]; + nat_elog_warn (sm, "create NAT session failed"); + return 0; + } + + s->ext_host_addr.as_u32 = ip->src_address.as_u32; + s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO; + s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; + s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; + s->out2in.addr.as_u32 = ip->dst_address.as_u32; + s->out2in.fib_index = rx_fib_index; + s->in2out.addr.as_u32 = m->local_addr.as_u32; + s->in2out.fib_index = m->fib_index; + s->in2out.port = s->out2in.port = ip->protocol; + + nat_6t_o2i_flow_init (sm, thread_index, s, ip->dst_address, 0, + ip->src_address, 0, m->fib_index, ip->protocol); + nat_6t_flow_saddr_rewrite_set (&s->i2o, ip->dst_address.as_u32); + if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1)) + { + nat_elog_notice (sm, "in2out key add failed"); + nat_ed_session_delete (sm, s, thread_index, 1); + return NULL; + } + + nat_6t_o2i_flow_init (sm, thread_index, s, ip->src_address, 0, + ip->dst_address, 0, rx_fib_index, ip->protocol); + nat_6t_flow_daddr_rewrite_set (&s->o2i, m->local_addr.as_u32); + nat_6t_flow_txfib_rewrite_set (&s->o2i, m->fib_index); + 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_out2in_fast_path_node_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + 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]; + + 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; + 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++; + + lookup_sport = vnet_buffer (b0)->ip.reass.l4_src_port; + lookup_dport = vnet_buffer (b0)->ip.reass.l4_dst_port; + + /* 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); + } + + next[0] = vnet_buffer2 (b0)->nat.arc_next; + + vnet_buffer (b0)->snat.flags = 0; + ip0 = vlib_buffer_get_current (b0); + + 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 (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_OUT2IN_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_saddr.as_u32 = ip0->src_address.as_u32; + lookup_daddr.as_u32 = ip0->dst_address.as_u32; + lookup_protocol = ip0->protocol; + } + + /* 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->o2i, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, lookup_protocol, + rx_fib_index0) || + (s0->flags & SNAT_SESSION_FLAG_TWICE_NAT && + nat_6t_flow_match (&s0->i2o, 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, lookup_saddr, lookup_sport, lookup_daddr, 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] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + 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] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + } + else + { + // session in transitory timeout, drop + b0->error = node->errors[NAT_OUT2IN_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) + { + // 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 (nat_6t_flow_match (&s0->o2i, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, lookup_protocol, + rx_fib_index0)) + { + f = &s0->o2i; + } + else if (s0->flags & SNAT_SESSION_FLAG_TWICE_NAT && + nat_6t_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, lookup_protocol, + rx_fib_index0)) + { + f = &s0->i2o; + } + else + { + /* + * 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_client)))) + { + goto trace0; + } + + if (!sm->forwarding_enabled) + { + b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; + next[0] = NAT_NEXT_DROP; + goto trace0; + } + else + { + 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 + { + // FIXME TODO bypass ??? + // create_bypass_for_fwd (sm, b0, s0, ip0, rx_fib_index0, + // thread_index); + 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, 0 /* is_output_feature */))) + { + next[0] = NAT_NEXT_DROP; + goto trace0; + } + + switch (proto0) + { + case NAT_PROTOCOL_TCP: + vlib_increment_simple_counter (&sm->counters.fastpath.out2in.tcp, + thread_index, sw_if_index0, 1); + nat44_set_tcp_session_state_o2i (sm, now, s0, + vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags, + vnet_buffer (b0)->ip. + reass.tcp_ack_number, + vnet_buffer (b0)->ip. + reass.tcp_seq_number, + thread_index); + break; + case NAT_PROTOCOL_UDP: + vlib_increment_simple_counter (&sm->counters.fastpath.out2in.udp, + thread_index, sw_if_index0, 1); + break; + case NAT_PROTOCOL_ICMP: + vlib_increment_simple_counter (&sm->counters.fastpath.out2in.icmp, + thread_index, sw_if_index0, 1); + break; + case NAT_PROTOCOL_OTHER: + vlib_increment_simple_counter (&sm->counters.fastpath.out2in.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))) + { + nat44_ed_out2in_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; + clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key)); + t->lookup_skipped = lookup_skipped; + + 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.out2in.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_out2in_slow_path_node_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + 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]; + snat_static_mapping_t *m; + + 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; + 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; + lb_nat_type_t lb_nat0; + twice_nat_type_t twice_nat0; + u8 identity_nat0; + ip4_address_t sm_addr; + u16 sm_port; + u32 sm_fib_index; + nat_translation_error_e translation_error = NAT_ED_TRNSL_ERR_SUCCESS; + + b0 = *b; + next[0] = vnet_buffer2 (b0)->nat.arc_next; + + vnet_buffer (b0)->snat.flags = 0; + ip0 = vlib_buffer_get_current (b0); + + 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_out2in_slowpath_unknown_proto ( + sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node); + if (!sm->forwarding_enabled) + { + if (!s0) + next[0] = NAT_NEXT_DROP; + } + if (NAT_NEXT_DROP != next[0] && + NAT_ED_TRNSL_ERR_SUCCESS != + (translation_error = nat_6t_flow_buf_translate ( + sm, b0, ip0, &s0->o2i, proto0, 0 /* is_output_feature */))) + { + goto trace0; + } + + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.other, + thread_index, sw_if_index0, 1); + goto trace0; + } + + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next[0] = icmp_out2in_ed_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next[0], now, thread_index, &s0); + + if (NAT_NEXT_DROP != next[0] && s0 && + NAT_ED_TRNSL_ERR_SUCCESS != + (translation_error = nat_6t_flow_buf_translate ( + sm, b0, ip0, &s0->o2i, proto0, 0 /* is_output_feature */))) + { + goto trace0; + } + + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.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); + + s0 = NULL; + 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) + { + /* Try to match static mapping by external address and port, + destination address and port in packet */ + + if (snat_static_mapping_match + (sm, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + proto0, &sm_addr, &sm_port, &sm_fib_index, 1, 0, + &twice_nat0, &lb_nat0, &ip0->src_address, &identity_nat0, &m)) + { + /* + * 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_client)))) + { + goto trace0; + } + + if (!sm->forwarding_enabled) + { + b0->error = + node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; + next[0] = NAT_NEXT_DROP; + } + else + { + if (next_src_nat + (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port, + vnet_buffer (b0)->ip.reass.l4_dst_port, + thread_index, rx_fib_index0)) + { + next[0] = NAT_NEXT_IN2OUT_ED_FAST_PATH; + } + else + { + create_bypass_for_fwd (sm, b0, s0, ip0, rx_fib_index0, + thread_index); + } + } + goto trace0; + } + + if (PREDICT_FALSE (identity_nat0)) + goto trace0; + + if ((proto0 == NAT_PROTOCOL_TCP) + && !tcp_flags_is_init (vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags)) + { + b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; + next[0] = NAT_NEXT_DROP; + goto trace0; + } + + /* Create session initiated by host from external network */ + s0 = create_session_for_static_mapping_ed (sm, b0, + sm_addr, sm_port, + sm_fib_index, + ip0->dst_address, + vnet_buffer (b0)-> + ip.reass.l4_dst_port, + rx_fib_index0, proto0, + node, rx_fib_index0, + thread_index, twice_nat0, + lb_nat0, now, m); + if (!s0) + { + next[0] = NAT_NEXT_DROP; + goto trace0; + } + } + + if (NAT_ED_TRNSL_ERR_SUCCESS != + (translation_error = nat_6t_flow_buf_translate ( + sm, b0, ip0, &s0->o2i, proto0, 0 /* is_output_feature */))) + { + next[0] = NAT_NEXT_DROP; + goto trace0; + } + + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.tcp, + thread_index, sw_if_index0, 1); + nat44_set_tcp_session_state_o2i (sm, now, s0, + vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags, + vnet_buffer (b0)->ip. + reass.tcp_ack_number, + vnet_buffer (b0)->ip. + reass.tcp_seq_number, + thread_index); + } + else + { + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.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))) + { + nat44_ed_out2in_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)); + } + else + { + t->session_index = ~0; + } + } + + if (next[0] == NAT_NEXT_DROP) + { + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.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_out2in_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + if (snat_main.num_workers > 1) + { + return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame, 1); + } + else + { + return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame, 0); + } +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (nat44_ed_out2in_node) = { + .name = "nat44-ed-out2in", + .vector_size = sizeof (u32), + .sibling_of = "nat-default", + .format_trace = format_nat44_ed_out2in_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings), + .error_strings = nat_out2in_ed_error_strings, + .runtime_data_bytes = sizeof (snat_runtime_t), +}; +/* *INDENT-ON* */ + +VLIB_NODE_FN (nat44_ed_out2in_slowpath_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nat44_ed_out2in_slow_path_node_fn_inline (vm, node, frame); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (nat44_ed_out2in_slowpath_node) = { + .name = "nat44-ed-out2in-slowpath", + .vector_size = sizeof (u32), + .sibling_of = "nat-default", + .format_trace = format_nat44_ed_out2in_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings), + .error_strings = nat_out2in_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, "out2in next_index %d arc_next_index %d", t->next_index, + t->arc_next_index); +} + +VLIB_NODE_FN (nat_pre_out2in_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_OUT2IN_ED_FAST_PATH); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (nat_pre_out2in_node) = { + .name = "nat-pre-out2in", + .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: + */ |