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authorFilip Varga <fivarga@cisco.com>2020-12-10 15:55:25 +0100
committerOle Tr�an <otroan@employees.org>2021-01-05 14:09:39 +0000
commita210798c407035f09c10c018ebdaf12312161730 (patch)
treec03e68701aaca9c3a4207107bdacb183da8a4a5a /src/plugins/nat/in2out.c
parent641c6be821c3136cb140b6726e16246f2f1cbd4c (diff)
nat: refactor and split fo EI/ED features
This patch is aimed at moving EI features out of NAT44 plugin & split of EI/ED functions. Type: refactor Change-Id: I63cf70a264ed2512708fe92665d64f04690783d0 Signed-off-by: Filip Varga <fivarga@cisco.com>
Diffstat (limited to 'src/plugins/nat/in2out.c')
-rw-r--r--src/plugins/nat/in2out.c1980
1 files changed, 0 insertions, 1980 deletions
diff --git a/src/plugins/nat/in2out.c b/src/plugins/nat/in2out.c
deleted file mode 100644
index 309329f12d9..00000000000
--- a/src/plugins/nat/in2out.c
+++ /dev/null
@@ -1,1980 +0,0 @@
-/*
- * Copyright (c) 2016 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-/**
- * @file
- * @brief NAT44 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 <nat/nat.h>
-#include <nat/lib/ipfix_logging.h>
-#include <nat/nat_inlines.h>
-#include <nat/nat44/inlines.h>
-#include <nat/lib/nat_syslog.h>
-#include <nat/nat_ha.h>
-
-#include <vppinfra/hash.h>
-#include <vppinfra/error.h>
-#include <vppinfra/elog.h>
-#include <nat/lib/nat_inlines.h>
-
-typedef struct
-{
- u32 sw_if_index;
- u32 next_index;
- u32 session_index;
- u32 is_slow_path;
- u32 is_hairpinning;
-} snat_in2out_trace_t;
-
-/* packet trace format function */
-static u8 *
-format_snat_in2out_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 *);
- snat_in2out_trace_t *t = va_arg (*args, snat_in2out_trace_t *);
- char *tag;
-
- tag = t->is_slow_path ? "NAT44_IN2OUT_SLOW_PATH" : "NAT44_IN2OUT_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 (t->is_hairpinning)
- {
- s = format (s, ", with-hairpinning");
- }
-
- return s;
-}
-
-static u8 *
-format_snat_in2out_fast_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 *);
- snat_in2out_trace_t *t = va_arg (*args, snat_in2out_trace_t *);
-
- s = format (s, "NAT44_IN2OUT_FAST: sw_if_index %d, next index %d",
- t->sw_if_index, t->next_index);
-
- return s;
-}
-
-#define foreach_snat_in2out_error \
-_(UNSUPPORTED_PROTOCOL, "unsupported protocol") \
-_(OUT_OF_PORTS, "out of ports") \
-_(BAD_OUTSIDE_FIB, "outside VRF ID not found") \
-_(BAD_ICMP_TYPE, "unsupported ICMP type") \
-_(NO_TRANSLATION, "no translation") \
-_(MAX_SESSIONS_EXCEEDED, "maximum sessions exceeded") \
-_(CANNOT_CREATE_USER, "cannot create NAT user")
-
-typedef enum
-{
-#define _(sym,str) SNAT_IN2OUT_ERROR_##sym,
- foreach_snat_in2out_error
-#undef _
- SNAT_IN2OUT_N_ERROR,
-} snat_in2out_error_t;
-
-static char *snat_in2out_error_strings[] = {
-#define _(sym,string) string,
- foreach_snat_in2out_error
-#undef _
-};
-
-typedef enum
-{
- SNAT_IN2OUT_NEXT_LOOKUP,
- SNAT_IN2OUT_NEXT_DROP,
- SNAT_IN2OUT_NEXT_ICMP_ERROR,
- SNAT_IN2OUT_NEXT_SLOW_PATH,
- SNAT_IN2OUT_N_NEXT,
-} snat_in2out_next_t;
-
-static inline int
-snat_not_translate (snat_main_t * sm, vlib_node_runtime_t * node,
- u32 sw_if_index0, ip4_header_t * ip0, u32 proto0,
- u32 rx_fib_index0, u32 thread_index)
-{
- udp_header_t *udp0 = ip4_next_header (ip0);
- clib_bihash_kv_8_8_t kv0, value0;
-
- init_nat_k (&kv0, ip0->dst_address, udp0->dst_port, sm->outside_fib_index,
- proto0);
-
- /* NAT packet aimed at external address if */
- /* has active sessions */
- if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0,
- &value0))
- {
- /* or is static mappings */
- ip4_address_t placeholder_addr;
- u16 placeholder_port;
- u32 placeholder_fib_index;
- if (!snat_static_mapping_match
- (sm, ip0->dst_address, udp0->dst_port, sm->outside_fib_index,
- proto0, &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_index0, ip0, proto0,
- rx_fib_index0);
-}
-
-static inline int
-nat_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip0,
- u32 proto0, u16 src_port, u16 dst_port,
- u32 thread_index, u32 sw_if_index)
-{
- clib_bihash_kv_8_8_t kv0, value0;
- snat_interface_t *i;
-
- /* src NAT check */
- init_nat_k (&kv0, ip0->src_address, src_port,
- ip4_fib_table_get_index_for_sw_if_index (sw_if_index), proto0);
-
- if (!clib_bihash_search_8_8
- (&sm->per_thread_data[thread_index].out2in, &kv0, &value0))
- return 1;
-
- /* dst NAT check */
- init_nat_k (&kv0, ip0->dst_address, dst_port,
- ip4_fib_table_get_index_for_sw_if_index (sw_if_index), proto0);
- if (!clib_bihash_search_8_8
- (&sm->per_thread_data[thread_index].in2out, &kv0, &value0))
- {
- /* hairpinning */
- /* *INDENT-OFF* */
- pool_foreach (i, sm->output_feature_interfaces)
- {
- if ((nat_interface_is_inside(i)) && (sw_if_index == i->sw_if_index))
- return 0;
- }
- /* *INDENT-ON* */
- return 1;
- }
-
- return 0;
-}
-
-#ifndef CLIB_MARCH_VARIANT
-int
-nat44_i2o_is_idle_session_cb (clib_bihash_kv_8_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;
- snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
- ctx->thread_index);
- clib_bihash_kv_8_8_t s_kv;
-
- s = pool_elt_at_index (tsm->sessions, kv->value);
- sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
- if (ctx->now >= sess_timeout_time)
- {
- init_nat_o2i_k (&s_kv, s);
- if (clib_bihash_add_del_8_8 (&tsm->out2in, &s_kv, 0))
- nat_elog_warn ("out2in key del failed");
-
- 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_apmdel (s->user_index, s->in2out.fib_index,
- &s->in2out.addr, s->in2out.port,
- &s->out2in.addr, s->out2in.port, s->nat_proto);
-
- 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 (!snat_is_session_static (s))
- snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
- &s->out2in.addr,
- s->out2in.port, s->nat_proto);
-
- nat44_delete_session (sm, s, ctx->thread_index);
- return 1;
- }
-
- return 0;
-}
-#endif
-
-static u32
-slow_path (snat_main_t * sm, vlib_buffer_t * b0,
- ip4_header_t * ip0,
- ip4_address_t i2o_addr,
- u16 i2o_port,
- u32 rx_fib_index0,
- nat_protocol_t nat_proto,
- snat_session_t ** sessionp,
- vlib_node_runtime_t * node, u32 next0, u32 thread_index, f64 now)
-{
- snat_user_t *u;
- snat_session_t *s = 0;
- clib_bihash_kv_8_8_t kv0;
- u8 is_sm = 0;
- nat_outside_fib_t *outside_fib;
- fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
- u8 identity_nat;
- fib_prefix_t pfx = {
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_len = 32,
- .fp_addr = {
- .ip4.as_u32 = ip0->dst_address.as_u32,
- },
- };
- nat44_is_idle_session_ctx_t ctx0;
- ip4_address_t sm_addr;
- u16 sm_port;
- u32 sm_fib_index;
-
- if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index)))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_SESSIONS_EXCEEDED];
- nat_ipfix_logging_max_sessions (thread_index,
- sm->max_translations_per_thread);
- nat_elog_notice ("maximum sessions exceeded");
- return SNAT_IN2OUT_NEXT_DROP;
- }
-
- /* First try to match static mapping by local address and port */
- if (snat_static_mapping_match
- (sm, i2o_addr, i2o_port, rx_fib_index0, nat_proto, &sm_addr,
- &sm_port, &sm_fib_index, 0, 0, 0, 0, 0, &identity_nat, 0))
- {
- /* Try to create dynamic translation */
- if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index0,
- thread_index,
- nat_proto,
- &sm_addr, &sm_port,
- sm->port_per_thread,
- sm->per_thread_data
- [thread_index].snat_thread_index))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
- return SNAT_IN2OUT_NEXT_DROP;
- }
- }
- else
- {
- if (PREDICT_FALSE (identity_nat))
- {
- *sessionp = s;
- return next0;
- }
-
- is_sm = 1;
- }
-
- u = nat_user_get_or_create (sm, &ip0->src_address, rx_fib_index0,
- thread_index);
- if (!u)
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_CANNOT_CREATE_USER];
- return SNAT_IN2OUT_NEXT_DROP;
- }
-
- s = nat_session_alloc_or_recycle (sm, u, thread_index, now);
- if (!s)
- {
- nat44_delete_user_with_no_session (sm, u, thread_index);
- nat_elog_warn ("create NAT session failed");
- return SNAT_IN2OUT_NEXT_DROP;
- }
-
- if (is_sm)
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- user_session_increment (sm, u, is_sm);
- s->in2out.addr = i2o_addr;
- s->in2out.port = i2o_port;
- s->in2out.fib_index = rx_fib_index0;
- s->nat_proto = nat_proto;
- s->out2in.addr = sm_addr;
- s->out2in.port = sm_port;
- 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:
- /* *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)
- {
- s->out2in.fib_index = outside_fib->fib_index;
- break;
- }
- }
- }
- /* *INDENT-ON* */
- break;
- }
- s->ext_host_addr.as_u32 = ip0->dst_address.as_u32;
- s->ext_host_port = vnet_buffer (b0)->ip.reass.l4_dst_port;
- *sessionp = s;
-
- /* Add to translation hashes */
- ctx0.now = now;
- ctx0.thread_index = thread_index;
- init_nat_i2o_kv (&kv0, s, s - sm->per_thread_data[thread_index].sessions);
- if (clib_bihash_add_or_overwrite_stale_8_8
- (&sm->per_thread_data[thread_index].in2out, &kv0,
- nat44_i2o_is_idle_session_cb, &ctx0))
- nat_elog_notice ("in2out key add failed");
-
- init_nat_o2i_kv (&kv0, s, s - sm->per_thread_data[thread_index].sessions);
- if (clib_bihash_add_or_overwrite_stale_8_8
- (&sm->per_thread_data[thread_index].out2in, &kv0,
- nat44_o2i_is_idle_session_cb, &ctx0))
- nat_elog_notice ("out2in key add failed");
-
- /* 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_apmadd (s->user_index, s->in2out.fib_index,
- &s->in2out.addr, s->in2out.port, &s->out2in.addr,
- s->out2in.port, s->nat_proto);
-
- 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);
-
- return next0;
-}
-
-#ifndef CLIB_MARCH_VARIANT
-static_always_inline snat_in2out_error_t
-icmp_get_key (vlib_buffer_t * b, ip4_header_t * ip0,
- ip4_address_t * addr, u16 * port, nat_protocol_t * nat_proto)
-{
- icmp46_header_t *icmp0;
- icmp_echo_header_t *echo0, *inner_echo0 = 0;
- ip4_header_t *inner_ip0 = 0;
- void *l4_header = 0;
- icmp46_header_t *inner_icmp0;
-
- icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- echo0 = (icmp_echo_header_t *) (icmp0 + 1);
-
- if (!icmp_type_is_error_message
- (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))
- {
- *nat_proto = NAT_PROTOCOL_ICMP;
- *addr = ip0->src_address;
- *port = vnet_buffer (b)->ip.reass.l4_src_port;
- }
- else
- {
- inner_ip0 = (ip4_header_t *) (echo0 + 1);
- l4_header = ip4_next_header (inner_ip0);
- *nat_proto = ip_proto_to_nat_proto (inner_ip0->protocol);
- *addr = inner_ip0->dst_address;
- switch (*nat_proto)
- {
- case NAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t *) l4_header;
- inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
- *port = inner_echo0->identifier;
- break;
- case NAT_PROTOCOL_UDP:
- case NAT_PROTOCOL_TCP:
- *port = ((tcp_udp_header_t *) l4_header)->dst_port;
- break;
- default:
- return SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL;
- }
- }
- return -1; /* success */
-}
-
-/**
- * Get address and port values to be used for ICMP packet translation
- * and create session if needed
- *
- * @param[in,out] sm NAT main
- * @param[in,out] node NAT node runtime
- * @param[in] thread_index thread index
- * @param[in,out] b0 buffer containing packet to be translated
- * @param[in,out] ip0 ip header
- * @param[out] p_proto protocol used for matching
- * @param[out] p_value address and port after NAT translation
- * @param[out] p_dont_translate if packet should not be translated
- * @param d optional parameter
- * @param e optional parameter
- */
-u32
-icmp_match_in2out_slow (snat_main_t * sm, vlib_node_runtime_t * node,
- u32 thread_index, vlib_buffer_t * b0,
- ip4_header_t * ip0, ip4_address_t * addr, u16 * port,
- u32 * fib_index, nat_protocol_t * proto, void *d,
- void *e, u8 * dont_translate)
-{
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- u32 sw_if_index0;
- snat_session_t *s0 = 0;
- clib_bihash_kv_8_8_t kv0, value0;
- u32 next0 = ~0;
- int err;
- vlib_main_t *vm = vlib_get_main ();
- *dont_translate = 0;
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- *fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
-
- err = icmp_get_key (b0, ip0, addr, port, proto);
- if (err != -1)
- {
- b0->error = node->errors[err];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
-
- init_nat_k (&kv0, *addr, *port, *fib_index, *proto);
- if (clib_bihash_search_8_8 (&tsm->in2out, &kv0, &value0))
- {
- if (vnet_buffer (b0)->sw_if_index[VLIB_TX] != ~0)
- {
- if (PREDICT_FALSE
- (nat_not_translate_output_feature
- (sm, ip0, *proto, *port, *port, thread_index, sw_if_index0)))
- {
- *dont_translate = 1;
- goto out;
- }
- }
- else
- {
- if (PREDICT_FALSE (snat_not_translate (sm, node, sw_if_index0,
- ip0, NAT_PROTOCOL_ICMP,
- *fib_index, thread_index)))
- {
- *dont_translate = 1;
- goto out;
- }
- }
-
- if (PREDICT_FALSE
- (icmp_type_is_error_message
- (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags)))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
-
- next0 =
- slow_path (sm, b0, ip0, *addr, *port, *fib_index, *proto, &s0, node,
- next0, thread_index, vlib_time_now (vm));
-
- if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto out;
-
- if (!s0)
- {
- *dont_translate = 1;
- goto out;
- }
- }
- else
- {
- if (PREDICT_FALSE
- (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[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
-
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
- }
-
-out:
- if (s0)
- {
- *addr = s0->out2in.addr;
- *port = s0->out2in.port;
- *fib_index = s0->out2in.fib_index;
- }
- if (d)
- *(snat_session_t **) (d) = s0;
- return next0;
-}
-#endif
-
-#ifndef CLIB_MARCH_VARIANT
-/**
- * Get address and port values to be used for ICMP packet translation
- *
- * @param[in] sm NAT main
- * @param[in,out] node NAT node runtime
- * @param[in] thread_index thread index
- * @param[in,out] b0 buffer containing packet to be translated
- * @param[in,out] ip0 ip header
- * @param[out] p_proto protocol used for matching
- * @param[out] p_value address and port after NAT translation
- * @param[out] p_dont_translate if packet should not be translated
- * @param d optional parameter
- * @param e optional parameter
- */
-u32
-icmp_match_in2out_fast (snat_main_t * sm, vlib_node_runtime_t * node,
- u32 thread_index, vlib_buffer_t * b0,
- ip4_header_t * ip0, ip4_address_t * addr, u16 * port,
- u32 * fib_index, nat_protocol_t * proto, void *d,
- void *e, u8 * dont_translate)
-{
- u32 sw_if_index0;
- u8 is_addr_only;
- u32 next0 = ~0;
- int err;
- *dont_translate = 0;
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- *fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
-
- err = icmp_get_key (b0, ip0, addr, port, proto);
- if (err != -1)
- {
- b0->error = node->errors[err];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
-
- ip4_address_t sm_addr;
- u16 sm_port;
- u32 sm_fib_index;
-
- if (snat_static_mapping_match
- (sm, *addr, *port, *fib_index, *proto, &sm_addr, &sm_port,
- &sm_fib_index, 0, &is_addr_only, 0, 0, 0, 0, 0))
- {
- if (PREDICT_FALSE (snat_not_translate_fast (sm, node, sw_if_index0, ip0,
- IP_PROTOCOL_ICMP,
- *fib_index)))
- {
- *dont_translate = 1;
- goto out;
- }
-
- if (icmp_type_is_error_message
- (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
-
- b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
-
- if (PREDICT_FALSE
- (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 || !is_addr_only)
- && !icmp_type_is_error_message (vnet_buffer (b0)->ip.
- reass.icmp_type_or_tcp_flags)))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
-
-out:
- return next0;
-}
-#endif
-
-#ifndef CLIB_MARCH_VARIANT
-u32
-icmp_in2out (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, u32 thread_index, void *d, void *e)
-{
- vlib_main_t *vm = vlib_get_main ();
- ip4_address_t addr;
- u16 port;
- u32 fib_index;
- nat_protocol_t protocol;
- icmp_echo_header_t *echo0, *inner_echo0 = 0;
- ip4_header_t *inner_ip0;
- void *l4_header = 0;
- icmp46_header_t *inner_icmp0;
- u8 dont_translate;
- u32 new_addr0, old_addr0;
- u16 old_id0, new_id0;
- u16 old_checksum0, new_checksum0;
- ip_csum_t sum0;
- u16 checksum0;
- u32 next0_tmp;
-
- echo0 = (icmp_echo_header_t *) (icmp0 + 1);
-
- next0_tmp =
- sm->icmp_match_in2out_cb (sm, node, thread_index, b0, ip0, &addr, &port,
- &fib_index, &protocol, d, e, &dont_translate);
- if (next0_tmp != ~0)
- next0 = next0_tmp;
- if (next0 == SNAT_IN2OUT_NEXT_DROP || dont_translate)
- goto out;
-
- if (PREDICT_TRUE (!ip4_is_fragment (ip0)))
- {
- sum0 =
- ip_incremental_checksum_buffer (vm, b0,
- (u8 *) icmp0 -
- (u8 *) vlib_buffer_get_current (b0),
- ntohs (ip0->length) -
- ip4_header_bytes (ip0), 0);
- checksum0 = ~ip_csum_fold (sum0);
- if (PREDICT_FALSE (checksum0 != 0 && checksum0 != 0xffff))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
- }
-
- old_addr0 = ip0->src_address.as_u32;
- new_addr0 = ip0->src_address.as_u32 = addr.as_u32;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- src_address /* changed member */ );
- ip0->checksum = ip_csum_fold (sum0);
-
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- if (icmp0->checksum == 0)
- icmp0->checksum = 0xffff;
-
- if (!icmp_type_is_error_message (icmp0->type))
- {
- new_id0 = port;
- if (PREDICT_FALSE (new_id0 != echo0->identifier))
- {
- old_id0 = echo0->identifier;
- new_id0 = port;
- echo0->identifier = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 =
- ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- }
- }
- else
- {
- inner_ip0 = (ip4_header_t *) (echo0 + 1);
- l4_header = ip4_next_header (inner_ip0);
-
- if (!ip4_header_checksum_is_valid (inner_ip0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
-
- /* update inner destination IP address */
- old_addr0 = inner_ip0->dst_address.as_u32;
- inner_ip0->dst_address = addr;
- new_addr0 = inner_ip0->dst_address.as_u32;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address /* changed member */ );
- icmp0->checksum = ip_csum_fold (sum0);
-
- /* update inner IP header checksum */
- old_checksum0 = inner_ip0->checksum;
- sum0 = inner_ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address /* changed member */ );
- inner_ip0->checksum = ip_csum_fold (sum0);
- new_checksum0 = inner_ip0->checksum;
- sum0 = icmp0->checksum;
- sum0 =
- ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
- checksum);
- icmp0->checksum = ip_csum_fold (sum0);
-
- switch (protocol)
- {
- case NAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t *) l4_header;
- inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
-
- old_id0 = inner_echo0->identifier;
- new_id0 = port;
- inner_echo0->identifier = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 =
- ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- break;
- case NAT_PROTOCOL_UDP:
- case NAT_PROTOCOL_TCP:
- old_id0 = ((tcp_udp_header_t *) l4_header)->dst_port;
- new_id0 = port;
- ((tcp_udp_header_t *) l4_header)->dst_port = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t,
- dst_port);
- icmp0->checksum = ip_csum_fold (sum0);
- break;
- default:
- ASSERT (0);
- }
- }
- }
-
- if (vnet_buffer (b0)->sw_if_index[VLIB_TX] == ~0)
- {
- if (0 != snat_icmp_hairpinning (sm, b0, ip0, icmp0,
- sm->endpoint_dependent))
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = fib_index;
- }
-
-out:
- return next0;
-}
-#endif
-
-static inline u32
-icmp_in2out_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 != SNAT_IN2OUT_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_in2out_sm_unknown_proto (snat_main_t * sm,
- vlib_buffer_t * b,
- ip4_header_t * ip, u32 rx_fib_index)
-{
- clib_bihash_kv_8_8_t kv, value;
- snat_static_mapping_t *m;
- u32 old_addr, new_addr;
- ip_csum_t sum;
-
- init_nat_k (&kv, ip->src_address, 0, rx_fib_index, 0);
- if (clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
- return 1;
-
- m = pool_elt_at_index (sm->static_mappings, value.value);
-
- old_addr = ip->src_address.as_u32;
- new_addr = ip->src_address.as_u32 = m->external_addr.as_u32;
- sum = ip->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
- ip->checksum = ip_csum_fold (sum);
-
-
- /* Hairpinning */
- if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
- {
- vnet_buffer (b)->sw_if_index[VLIB_TX] = m->fib_index;
- nat_hairpinning_sm_unknown_proto (sm, b, ip);
- }
-
- return 0;
-}
-
-static inline uword
-snat_in2out_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, int is_slow_path,
- 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;
-
- 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 >= 2)
- {
- vlib_buffer_t *b0, *b1;
- u32 next0, next1;
- u32 sw_if_index0, sw_if_index1;
- ip4_header_t *ip0, *ip1;
- ip_csum_t sum0, sum1;
- u32 new_addr0, old_addr0, new_addr1, old_addr1;
- u16 old_port0, new_port0, old_port1, new_port1;
- udp_header_t *udp0, *udp1;
- tcp_header_t *tcp0, *tcp1;
- icmp46_header_t *icmp0, *icmp1;
- u32 rx_fib_index0, rx_fib_index1;
- u32 proto0, proto1;
- snat_session_t *s0 = 0, *s1 = 0;
- clib_bihash_kv_8_8_t kv0, value0, kv1, value1;
- u32 iph_offset0 = 0, iph_offset1 = 0;
-
- b0 = *b;
- b++;
- b1 = *b;
- b++;
-
- /* Prefetch next iteration. */
- if (PREDICT_TRUE (n_left_from >= 4))
- {
- vlib_buffer_t *p2, *p3;
-
- p2 = *b;
- p3 = *(b + 1);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
-
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
-
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- sw_if_index0);
-
- next0 = next1 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- 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);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace00;
- }
-
- proto0 = ip_proto_to_nat_proto (ip0->protocol);
-
- /* Next configured feature, probably ip4-lookup */
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- {
- if (nat_in2out_sm_unknown_proto (sm, b0, ip0, rx_fib_index0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error =
- node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
- }
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.
- other : &sm->counters.fastpath.
- in2out.other, thread_index,
- sw_if_index0, 1);
- goto trace00;
- }
-
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
- node, next0, now, thread_index, &s0);
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.
- icmp : &sm->counters.fastpath.
- in2out.icmp, thread_index,
- sw_if_index0, 1);
- goto trace00;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace00;
- }
-
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace00;
- }
- }
-
- init_nat_k (&kv0, ip0->src_address,
- vnet_buffer (b0)->ip.reass.l4_src_port, rx_fib_index0,
- proto0);
- if (PREDICT_FALSE
- (clib_bihash_search_8_8
- (&sm->per_thread_data[thread_index].in2out, &kv0, &value0) != 0))
- {
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat_not_translate_output_feature
- (sm, ip0, proto0,
- vnet_buffer (b0)->ip.reass.l4_src_port,
- vnet_buffer (b0)->ip.reass.l4_dst_port,
- thread_index, sw_if_index0)))
- goto trace00;
-
- /*
- * 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 trace00;
- }
- else
- {
- if (PREDICT_FALSE
- (snat_not_translate
- (sm, node, sw_if_index0, ip0, proto0,
- rx_fib_index0, thread_index)))
- goto trace00;
- }
-
- next0 = slow_path (sm, b0, ip0,
- ip0->src_address,
- vnet_buffer (b0)->ip.reass.l4_src_port,
- rx_fib_index0,
- proto0, &s0, node, next0, thread_index, now);
- if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto trace00;
-
- if (PREDICT_FALSE (!s0))
- goto trace00;
- }
- else
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace00;
- }
- }
- else
- s0 =
- pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
-
- b0->flags |= VNET_BUFFER_F_IS_NATED;
-
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address = s0->out2in.addr;
- new_addr0 = ip0->src_address.as_u32;
- if (!is_output_feature)
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t, src_address /* changed member */ );
- ip0->checksum = ip_csum_fold (sum0);
-
-
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
- 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 /* changed member */ );
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- mss_clamping (sm->mss_clamping, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold (sum0);
- }
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.tcp : &sm->
- counters.fastpath.in2out.tcp,
- thread_index, sw_if_index0, 1);
- }
- else
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- udp0->src_port = s0->out2in.port;
- if (PREDICT_FALSE (udp0->checksum))
- {
- old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
- new_port0 = udp0->src_port;
- sum0 = udp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address /* changed member */
- );
- sum0 =
- ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- udp0->checksum = ip_csum_fold (sum0);
- }
- }
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.udp : &sm->
- counters.fastpath.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);
- trace00:
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index =
- s0 - sm->per_thread_data[thread_index].sessions;
- }
-
- if (next0 == SNAT_IN2OUT_NEXT_DROP)
- {
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.
- drops : &sm->counters.fastpath.
- in2out.drops, thread_index,
- sw_if_index0, 1);
- }
-
- if (is_output_feature)
- iph_offset1 = vnet_buffer (b1)->ip.reass.save_rewrite_length;
-
- ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) +
- iph_offset1);
-
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
- icmp1 = (icmp46_header_t *) udp1;
-
- sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
- rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- sw_if_index1);
-
- if (PREDICT_FALSE (ip1->ttl == 1))
- {
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace01;
- }
-
- proto1 = ip_proto_to_nat_proto (ip1->protocol);
-
- /* Next configured feature, probably ip4-lookup */
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_OTHER))
- {
- if (nat_in2out_sm_unknown_proto (sm, b1, ip1, rx_fib_index1))
- {
- next1 = SNAT_IN2OUT_NEXT_DROP;
- b1->error =
- node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
- }
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.
- other : &sm->counters.fastpath.
- in2out.other, thread_index,
- sw_if_index1, 1);
- goto trace01;
- }
-
- if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_ICMP))
- {
- next1 = icmp_in2out_slow_path
- (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
- next1, now, thread_index, &s1);
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.
- icmp : &sm->counters.fastpath.
- in2out.icmp, thread_index,
- sw_if_index1, 1);
- goto trace01;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_OTHER))
- {
- next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace01;
- }
-
- if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_ICMP))
- {
- next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
-
- init_nat_k (&kv1, ip1->src_address,
- vnet_buffer (b1)->ip.reass.l4_src_port, rx_fib_index1,
- proto1);
- if (PREDICT_FALSE
- (clib_bihash_search_8_8
- (&sm->per_thread_data[thread_index].in2out, &kv1, &value1) != 0))
- {
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat_not_translate_output_feature
- (sm, ip1, proto1,
- vnet_buffer (b1)->ip.reass.l4_src_port,
- vnet_buffer (b1)->ip.reass.l4_dst_port,
- thread_index, sw_if_index1)))
- goto trace01;
-
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (PREDICT_FALSE
- (proto1 == NAT_PROTOCOL_UDP
- && (vnet_buffer (b1)->ip.reass.l4_dst_port ==
- clib_host_to_net_u16
- (UDP_DST_PORT_dhcp_to_server))
- && ip1->dst_address.as_u32 == 0xffffffff))
- goto trace01;
- }
- else
- {
- if (PREDICT_FALSE
- (snat_not_translate
- (sm, node, sw_if_index1, ip1, proto1,
- rx_fib_index1, thread_index)))
- goto trace01;
- }
-
- next1 =
- slow_path (sm, b1, ip1, ip1->src_address,
- vnet_buffer (b1)->ip.reass.l4_src_port,
- rx_fib_index1, proto1, &s1, node, next1,
- thread_index, now);
- if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP))
- goto trace01;
-
- if (PREDICT_FALSE (!s1))
- goto trace01;
- }
- else
- {
- next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
- else
- s1 =
- pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value1.value);
-
- b1->flags |= VNET_BUFFER_F_IS_NATED;
-
- old_addr1 = ip1->src_address.as_u32;
- ip1->src_address = s1->out2in.addr;
- new_addr1 = ip1->src_address.as_u32;
- if (!is_output_feature)
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index;
-
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
- ip4_header_t, src_address /* changed member */ );
- ip1->checksum = ip_csum_fold (sum1);
-
- if (PREDICT_TRUE (proto1 == NAT_PROTOCOL_TCP))
- {
- if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
- {
- old_port1 = vnet_buffer (b1)->ip.reass.l4_src_port;
- new_port1 = udp1->src_port = s1->out2in.port;
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
- ip4_header_t,
- dst_address /* changed member */ );
- sum1 = ip_csum_update (sum1, old_port1, new_port1,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- mss_clamping (sm->mss_clamping, tcp1, &sum1);
- tcp1->checksum = ip_csum_fold (sum1);
- }
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.tcp : &sm->
- counters.fastpath.in2out.tcp,
- thread_index, sw_if_index1, 1);
- }
- else
- {
- if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
- {
- udp1->src_port = s1->out2in.port;
- if (PREDICT_FALSE (udp1->checksum))
- {
- old_port1 = vnet_buffer (b1)->ip.reass.l4_src_port;
- new_port1 = udp1->src_port;
- sum1 = udp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, dst_address /* changed member */
- );
- sum1 =
- ip_csum_update (sum1, old_port1, new_port1,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- udp1->checksum = ip_csum_fold (sum1);
- }
- }
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.udp : &sm->
- counters.fastpath.in2out.udp,
- thread_index, sw_if_index1, 1);
- }
-
- /* Accounting */
- nat44_session_update_counters (s1, now,
- vlib_buffer_length_in_chain (vm, b1),
- thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s1, thread_index);
- trace01:
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t));
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (s1)
- t->session_index =
- s1 - sm->per_thread_data[thread_index].sessions;
- }
-
- if (next1 == SNAT_IN2OUT_NEXT_DROP)
- {
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.
- drops : &sm->counters.fastpath.
- in2out.drops, thread_index,
- sw_if_index1, 1);
- }
-
- n_left_from -= 2;
- next[0] = next0;
- next[1] = next1;
- next += 2;
- }
-
- while (n_left_from > 0)
- {
- vlib_buffer_t *b0;
- u32 next0;
- u32 sw_if_index0;
- ip4_header_t *ip0;
- ip_csum_t sum0;
- u32 new_addr0, old_addr0;
- u16 old_port0, new_port0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- u32 rx_fib_index0;
- u32 proto0;
- snat_session_t *s0 = 0;
- clib_bihash_kv_8_8_t kv0, value0;
- u32 iph_offset0 = 0;
-
- b0 = *b;
- b++;
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
-
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
-
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- 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);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace0;
- }
-
- proto0 = ip_proto_to_nat_proto (ip0->protocol);
-
- /* Next configured feature, probably ip4-lookup */
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- {
- if (nat_in2out_sm_unknown_proto (sm, b0, ip0, rx_fib_index0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error =
- node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
- }
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.
- other : &sm->counters.fastpath.
- in2out.other, thread_index,
- sw_if_index0, 1);
- goto trace0;
- }
-
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.
- icmp : &sm->counters.fastpath.
- in2out.icmp, thread_index,
- sw_if_index0, 1);
- goto trace0;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace0;
- }
-
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace0;
- }
- }
-
- init_nat_k (&kv0, ip0->src_address,
- vnet_buffer (b0)->ip.reass.l4_src_port, rx_fib_index0,
- proto0);
-
- if (clib_bihash_search_8_8
- (&sm->per_thread_data[thread_index].in2out, &kv0, &value0))
- {
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat_not_translate_output_feature
- (sm, ip0, proto0,
- vnet_buffer (b0)->ip.reass.l4_src_port,
- vnet_buffer (b0)->ip.reass.l4_dst_port,
- thread_index, sw_if_index0)))
- 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
- (snat_not_translate
- (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
- thread_index)))
- goto trace0;
- }
-
- next0 =
- slow_path (sm, b0, ip0, ip0->src_address,
- vnet_buffer (b0)->ip.reass.l4_src_port,
- rx_fib_index0, proto0, &s0, node, next0,
- thread_index, now);
-
- if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto trace0;
-
- if (PREDICT_FALSE (!s0))
- goto trace0;
- }
- else
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace0;
- }
- }
- else
- s0 =
- pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
-
- b0->flags |= VNET_BUFFER_F_IS_NATED;
-
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address = s0->out2in.addr;
- new_addr0 = ip0->src_address.as_u32;
- if (!is_output_feature)
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t, src_address /* changed member */ );
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
- 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 /* changed member */ );
- sum0 =
- ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- mss_clamping (sm->mss_clamping, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold (sum0);
- }
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.tcp : &sm->
- counters.fastpath.in2out.tcp,
- thread_index, sw_if_index0, 1);
- }
- else
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- udp0->src_port = s0->out2in.port;
- if (PREDICT_FALSE (udp0->checksum))
- {
- old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
- new_port0 = udp0->src_port;
- sum0 = udp0->checksum;
- sum0 =
- ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address /* changed member */ );
- sum0 =
- ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- udp0->checksum = ip_csum_fold (sum0);
- }
- }
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.udp : &sm->
- counters.fastpath.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)))
- {
- snat_in2out_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index =
- s0 - sm->per_thread_data[thread_index].sessions;
- }
-
- if (next0 == SNAT_IN2OUT_NEXT_DROP)
- {
- vlib_increment_simple_counter (is_slow_path ? &sm->
- counters.slowpath.in2out.
- drops : &sm->counters.fastpath.
- in2out.drops, thread_index,
- sw_if_index0, 1);
- }
-
- n_left_from--;
- next[0] = next0;
- next++;
- }
-
- vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
- frame->n_vectors);
- return frame->n_vectors;
-}
-
-VLIB_NODE_FN (snat_in2out_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */ ,
- 0);
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (snat_in2out_node) = {
- .name = "nat44-in2out",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- },
-};
-/* *INDENT-ON* */
-
-VLIB_NODE_FN (snat_in2out_output_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */ ,
- 1);
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (snat_in2out_output_node) = {
- .name = "nat44-in2out-output",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-output-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- },
-};
-/* *INDENT-ON* */
-
-VLIB_NODE_FN (snat_in2out_slowpath_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */ ,
- 0);
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (snat_in2out_slowpath_node) = {
- .name = "nat44-in2out-slowpath",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- },
-};
-/* *INDENT-ON* */
-
-VLIB_NODE_FN (snat_in2out_output_slowpath_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */ ,
- 1);
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (snat_in2out_output_slowpath_node) = {
- .name = "nat44-in2out-output-slowpath",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-output-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- },
-};
-/* *INDENT-ON* */
-
-VLIB_NODE_FN (snat_in2out_fast_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, *from, *to_next;
- snat_in2out_next_t next_index;
- snat_main_t *sm = &snat_main;
- int is_hairpinning = 0;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0;
- u32 sw_if_index0;
- ip4_header_t *ip0;
- ip_csum_t sum0;
- u32 new_addr0, old_addr0;
- u16 old_port0, new_port0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- u32 proto0;
- u32 rx_fib_index0;
- ip4_address_t sm0_addr;
- u16 sm0_port;
- u32 sm0_fib_index;
-
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 =
- ip4_fib_table_get_index_for_sw_if_index (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);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace0;
- }
-
- proto0 = ip_proto_to_nat_proto (ip0->protocol);
-
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- goto trace0;
-
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, ~0, 0, 0);
- goto trace0;
- }
-
- if (snat_static_mapping_match
- (sm, ip0->src_address, udp0->src_port, rx_fib_index0, proto0,
- &sm0_addr, &sm0_port, &sm0_fib_index, 0, 0, 0, 0, 0, 0, 0))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto trace0;
- }
-
- new_addr0 = sm0_addr.as_u32;
- new_port0 = sm0_port;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0_fib_index;
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address.as_u32 = new_addr0;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */ );
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE (new_port0 != udp0->dst_port))
- {
- old_port0 = udp0->src_port;
- udp0->src_port = new_port0;
-
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- mss_clamping (sm->mss_clamping, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold (sum0);
- }
- else if (udp0->checksum)
- {
- sum0 = udp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- udp0->checksum = ip_csum_fold (sum0);
- }
- }
- else
- {
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
- mss_clamping (sm->mss_clamping, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold (sum0);
- }
- else if (udp0->checksum)
- {
- sum0 = udp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
- udp0->checksum = ip_csum_fold (sum0);
- }
- }
-
- /* Hairpinning */
- is_hairpinning =
- snat_hairpinning (vm, node, sm, b0, ip0, udp0, tcp0, proto0, 0,
- 0 /* do_trace */ );
-
- trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->is_hairpinning = is_hairpinning;
- }
-
- if (next0 != SNAT_IN2OUT_NEXT_DROP)
- {
-
- vlib_increment_simple_counter (&sm->counters.fastpath.
- in2out.other, sw_if_index0,
- vm->thread_index, 1);
- }
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
-}
-
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (snat_in2out_fast_node) = {
- .name = "nat44-in2out-fast",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_fast_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- },
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */