diff options
| author |   Filip Varga <fivarga@cisco.com> | 2021-02-17 14:34:54 +0100 |
|---|---|---|
| committer |   Ole Tr�an <otroan@employees.org> | 2021-02-24 19:25:25 +0000 |
| commit | 0eaf4e6784efb2d058fe2f031578251b6bcc0aa8 (patch) | |
| tree | cc0c2b485bfee51068fa4970acc9f95ec595e8e5 /src/plugins/nat/nat.c | |
| parent | 5db2f4a4312112ab57043ce88f10edc4acc141ec (diff) | |
nat: Final NAT44 EI/ED split patch
This patch achieves complete separation of
endpoint-dependent and endpoint-independent IPv4 NAT
features. Some common stuff is also moved to NAT
library.
Type: refactor
Change-Id: I52468b7e2b5ac28958a2baf8e2ea01787322e801
Signed-off-by: Filip Varga <fivarga@cisco.com>
Diffstat (limited to 'src/plugins/nat/nat.c')
| -rw-r--r-- | src/plugins/nat/nat.c | 4246 |
1 files changed, 0 insertions, 4246 deletions
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c deleted file mode 100644 index 85d4775c8fe..00000000000 --- a/src/plugins/nat/nat.c +++ /dev/null @@ -1,4246 +0,0 @@ -/* - * snat.c - simple nat plugin - * - * 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. - */ - -#include <vnet/vnet.h> -#include <vnet/ip/ip.h> -#include <vnet/ip/ip4.h> -#include <vnet/plugin/plugin.h> -#include <nat/nat.h> -#include <nat/nat_dpo.h> -#include <nat/lib/ipfix_logging.h> -#include <nat/lib/nat_syslog.h> -#include <nat/nat_inlines.h> -#include <nat/nat44/inlines.h> -#include <nat/nat_affinity.h> -#include <vnet/fib/fib_table.h> -#include <vnet/fib/ip4_fib.h> -#include <vnet/ip/reass/ip4_sv_reass.h> -#include <vppinfra/bihash_16_8.h> -#include <nat/nat44/ed_inlines.h> -#include <vnet/ip/ip_table.h> - -#include <nat/nat44-ei/nat44_ei_ha.h> -#include <nat/nat44-ei/nat44_ei.h> - -#include <vpp/app/version.h> -#include <nat/lib/nat_inlines.h> - -snat_main_t snat_main; - -#define skip_if_disabled() \ - do \ - { \ - snat_main_t *sm = &snat_main; \ - if (PREDICT_FALSE (!sm->enabled)) \ - return; \ - } \ - while (0) - -#define fail_if_enabled() \ - do \ - { \ - snat_main_t *sm = &snat_main; \ - if (PREDICT_FALSE (sm->enabled)) \ - { \ - nat_log_err ("plugin enabled"); \ - return 1; \ - } \ - } \ - while (0) - -#define fail_if_disabled() \ - do \ - { \ - snat_main_t *sm = &snat_main; \ - if (PREDICT_FALSE (!sm->enabled)) \ - { \ - nat_log_err ("plugin disabled"); \ - return 1; \ - } \ - } \ - while (0) - -/* *INDENT-OFF* */ -/* Hook up input features */ -VNET_FEATURE_INIT (nat_pre_in2out, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat-pre-in2out", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa", - "ip4-sv-reassembly-feature"), -}; -VNET_FEATURE_INIT (nat_pre_out2in, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat-pre-out2in", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa", - "ip4-dhcp-client-detect", - "ip4-sv-reassembly-feature"), -}; -VNET_FEATURE_INIT (snat_in2out_worker_handoff, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat44-in2out-worker-handoff", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"), -}; -VNET_FEATURE_INIT (snat_out2in_worker_handoff, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat44-out2in-worker-handoff", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa", - "ip4-dhcp-client-detect"), -}; -VNET_FEATURE_INIT (ip4_snat_in2out, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat44-in2out", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa","ip4-sv-reassembly-feature"), -}; -VNET_FEATURE_INIT (ip4_snat_out2in, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat44-out2in", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa","ip4-sv-reassembly-feature", - "ip4-dhcp-client-detect"), -}; -VNET_FEATURE_INIT (ip4_nat_classify, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat44-classify", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa","ip4-sv-reassembly-feature"), -}; -VNET_FEATURE_INIT (ip4_nat44_ed_in2out, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat44-ed-in2out", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa","ip4-sv-reassembly-feature"), -}; -VNET_FEATURE_INIT (ip4_nat44_ed_out2in, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat44-ed-out2in", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa","ip4-sv-reassembly-feature", - "ip4-dhcp-client-detect"), -}; -VNET_FEATURE_INIT (ip4_nat44_ed_classify, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat44-ed-classify", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa","ip4-sv-reassembly-feature"), -}; -VNET_FEATURE_INIT (ip4_nat_handoff_classify, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat44-handoff-classify", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa","ip4-sv-reassembly-feature"), -}; -VNET_FEATURE_INIT (ip4_snat_in2out_fast, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat44-in2out-fast", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa","ip4-sv-reassembly-feature"), -}; -VNET_FEATURE_INIT (ip4_snat_out2in_fast, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat44-out2in-fast", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa","ip4-sv-reassembly-feature", - "ip4-dhcp-client-detect"), -}; -VNET_FEATURE_INIT (ip4_snat_hairpin_dst, static) = { - .arc_name = "ip4-unicast", - .node_name = "nat44-hairpin-dst", - .runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa","ip4-sv-reassembly-feature"), -}; - -/* Hook up output features */ -VNET_FEATURE_INIT (ip4_snat_in2out_output, static) = { - .arc_name = "ip4-output", - .node_name = "nat44-in2out-output", - .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa","ip4-sv-reassembly-output-feature"), -}; -VNET_FEATURE_INIT (ip4_snat_in2out_output_worker_handoff, static) = { - .arc_name = "ip4-output", - .node_name = "nat44-in2out-output-worker-handoff", - .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa","ip4-sv-reassembly-output-feature"), -}; -VNET_FEATURE_INIT (ip4_snat_hairpin_src, static) = { - .arc_name = "ip4-output", - .node_name = "nat44-hairpin-src", - .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa","ip4-sv-reassembly-output-feature"), -}; -VNET_FEATURE_INIT (nat_pre_in2out_output, static) = { - .arc_name = "ip4-output", - .node_name = "nat-pre-in2out-output", - .runs_after = VNET_FEATURES ("ip4-sv-reassembly-output-feature"), - .runs_before = VNET_FEATURES ("acl-plugin-out-ip4-fa"), -}; -VNET_FEATURE_INIT (ip4_nat44_ed_in2out_output, static) = { - .arc_name = "ip4-output", - .node_name = "nat44-ed-in2out-output", - .runs_after = VNET_FEATURES ("ip4-sv-reassembly-output-feature"), - .runs_before = VNET_FEATURES ("acl-plugin-out-ip4-fa"), -}; - -/* Hook up ip4-local features */ -VNET_FEATURE_INIT (ip4_nat_hairpinning, static) = -{ - .arc_name = "ip4-local", - .node_name = "nat44-hairpinning", - .runs_before = VNET_FEATURES("ip4-local-end-of-arc"), -}; - -VLIB_PLUGIN_REGISTER () = { - .version = VPP_BUILD_VER, - .description = "Network Address Translation (NAT)", -}; -/* *INDENT-ON* */ - -static void nat44_ed_db_init (u32 translations, u32 translation_buckets, - u32 user_buckets); - -static void nat44_ed_db_free (); - -static u32 -nat44_ed_get_worker_out2in_cb (vlib_buffer_t * b, ip4_header_t * ip, - u32 rx_fib_index, u8 is_output); - -static u32 -nat44_ed_get_worker_in2out_cb (ip4_header_t * ip, u32 rx_fib_index, - u8 is_output); - -u32 nat_calc_bihash_buckets (u32 n_elts); - -u8 * -format_session_kvp (u8 * s, va_list * args) -{ - clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *); - - s = format (s, "%U thread-index %llu session-index %llu", format_snat_key, - v->key, nat_value_get_thread_index (v), - nat_value_get_session_index (v)); - - return s; -} - -u8 * -format_static_mapping_kvp (u8 * s, va_list * args) -{ - clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *); - - s = format (s, "%U static-mapping-index %llu", - format_snat_key, v->key, v->value); - - return s; -} - -u8 * -format_user_kvp (u8 * s, va_list * args) -{ - clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *); - snat_user_key_t k; - - k.as_u64 = v->key; - - s = format (s, "%U fib %d user-index %llu", format_ip4_address, &k.addr, - k.fib_index, v->value); - - return s; -} - -u8 * -format_ed_session_kvp (u8 * s, va_list * args) -{ - clib_bihash_kv_16_8_t *v = va_arg (*args, clib_bihash_kv_16_8_t *); - - u8 proto; - u16 r_port, l_port; - ip4_address_t l_addr, r_addr; - u32 fib_index; - - split_ed_kv (v, &l_addr, &r_addr, &proto, &fib_index, &l_port, &r_port); - s = format (s, - "local %U:%d remote %U:%d proto %U fib %d thread-index %u " - "session-index %u", - format_ip4_address, &l_addr, clib_net_to_host_u16 (l_port), - format_ip4_address, &r_addr, clib_net_to_host_u16 (r_port), - format_ip_protocol, proto, fib_index, - ed_value_get_thread_index (v), ed_value_get_session_index (v)); - - return s; -} - -void -nat_free_session_data (snat_main_t * sm, snat_session_t * s, u32 thread_index, - u8 is_ha) -{ - clib_bihash_kv_8_8_t kv; - - if (is_ed_session (s)) - { - per_vrf_sessions_unregister_session (s, thread_index); - - if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 0)) - nat_elog_warn ("flow hash del failed"); - - if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 0)) - nat_elog_warn ("flow hash del failed"); - } - - if (is_fwd_bypass_session (s)) - { - return; - } - - /* session lookup tables */ - if (is_ed_session (s)) - { - if (is_affinity_sessions (s)) - nat_affinity_unlock (s->ext_host_addr, s->out2in.addr, - s->nat_proto, s->out2in.port); - - if (!is_ha) - nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index, - &s->in2out.addr, s->in2out.port, - &s->ext_host_nat_addr, s->ext_host_nat_port, - &s->out2in.addr, s->out2in.port, - &s->ext_host_addr, s->ext_host_port, - s->nat_proto, is_twice_nat_session (s)); - } - else - { - init_nat_i2o_k (&kv, s); - if (clib_bihash_add_del_8_8 (&sm->in2out, &kv, 0)) - nat_elog_warn ("in2out key del failed"); - init_nat_o2i_k (&kv, s); - if (clib_bihash_add_del_8_8 (&sm->out2in, &kv, 0)) - nat_elog_warn ("out2in key del failed"); - - if (!is_ha) - 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); - } - - if (snat_is_unk_proto_session (s)) - return; - - if (!is_ha) - { - /* log NAT event */ - nat_ipfix_logging_nat44_ses_delete (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_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr, - s->ext_host_port, s->nat_proto, s->out2in.fib_index, - thread_index); - } - - /* Twice NAT address and port for external host */ - if (is_twice_nat_session (s)) - { - 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); - } - - if (snat_is_session_static (s)) - return; - - snat_free_outside_address_and_port (sm->addresses, thread_index, - &s->out2in.addr, s->out2in.port, - s->nat_proto); -} - -snat_user_t * -nat_user_get_or_create (snat_main_t * sm, ip4_address_t * addr, u32 fib_index, - u32 thread_index) -{ - snat_user_t *u = 0; - snat_user_key_t user_key; - clib_bihash_kv_8_8_t kv, value; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - dlist_elt_t *per_user_list_head_elt; - - user_key.addr.as_u32 = addr->as_u32; - user_key.fib_index = fib_index; - kv.key = user_key.as_u64; - - /* Ever heard of the "user" = src ip4 address before? */ - if (clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value)) - { - if (pool_elts (tsm->users) >= sm->max_users_per_thread) - { - vlib_increment_simple_counter (&sm->user_limit_reached, - thread_index, 0, 1); - nat_elog_warn ("maximum user limit reached"); - return NULL; - } - /* no, make a new one */ - pool_get (tsm->users, u); - clib_memset (u, 0, sizeof (*u)); - - u->addr.as_u32 = addr->as_u32; - u->fib_index = fib_index; - - pool_get (tsm->list_pool, per_user_list_head_elt); - - u->sessions_per_user_list_head_index = per_user_list_head_elt - - tsm->list_pool; - - clib_dlist_init (tsm->list_pool, u->sessions_per_user_list_head_index); - - kv.value = u - tsm->users; - - /* add user */ - if (clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 1)) - { - nat_elog_warn ("user_hash key add failed"); - nat44_delete_user_with_no_session (sm, u, thread_index); - return NULL; - } - - vlib_set_simple_counter (&sm->total_users, thread_index, 0, - pool_elts (tsm->users)); - } - else - { - u = pool_elt_at_index (tsm->users, value.value); - } - - return u; -} - -// only NAT EI -snat_session_t * -nat_session_alloc_or_recycle (snat_main_t * sm, snat_user_t * u, - u32 thread_index, f64 now) -{ - snat_session_t *s; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - u32 oldest_per_user_translation_list_index, session_index; - dlist_elt_t *oldest_per_user_translation_list_elt; - dlist_elt_t *per_user_translation_list_elt; - - /* Over quota? Recycle the least recently used translation */ - if ((u->nsessions + u->nstaticsessions) >= sm->max_translations_per_user) - { - oldest_per_user_translation_list_index = - clib_dlist_remove_head (tsm->list_pool, - u->sessions_per_user_list_head_index); - - ASSERT (oldest_per_user_translation_list_index != ~0); - - /* Add it back to the end of the LRU list */ - clib_dlist_addtail (tsm->list_pool, - u->sessions_per_user_list_head_index, - oldest_per_user_translation_list_index); - /* Get the list element */ - oldest_per_user_translation_list_elt = - pool_elt_at_index (tsm->list_pool, - oldest_per_user_translation_list_index); - - /* Get the session index from the list element */ - session_index = oldest_per_user_translation_list_elt->value; - - /* Get the session */ - s = pool_elt_at_index (tsm->sessions, session_index); - - // TODO: ONLY EI version should be called - nat_free_session_data (sm, s, thread_index, 0); - if (snat_is_session_static (s)) - u->nstaticsessions--; - else - u->nsessions--; - s->flags = 0; - s->total_bytes = 0; - s->total_pkts = 0; - s->state = 0; - s->ext_host_addr.as_u32 = 0; - s->ext_host_port = 0; - s->ext_host_nat_addr.as_u32 = 0; - s->ext_host_nat_port = 0; - } - else - { - pool_get (tsm->sessions, s); - clib_memset (s, 0, sizeof (*s)); - - /* Create list elts */ - pool_get (tsm->list_pool, per_user_translation_list_elt); - clib_dlist_init (tsm->list_pool, - per_user_translation_list_elt - tsm->list_pool); - - per_user_translation_list_elt->value = s - tsm->sessions; - s->per_user_index = per_user_translation_list_elt - tsm->list_pool; - s->per_user_list_head_index = u->sessions_per_user_list_head_index; - - clib_dlist_addtail (tsm->list_pool, - s->per_user_list_head_index, - per_user_translation_list_elt - tsm->list_pool); - - s->user_index = u - tsm->users; - vlib_set_simple_counter (&sm->total_sessions, thread_index, 0, - pool_elts (tsm->sessions)); - } - - s->ha_last_refreshed = now; - - return s; -} - -void -snat_add_del_addr_to_fib (ip4_address_t * addr, u8 p_len, u32 sw_if_index, - int is_add) -{ - snat_main_t *sm = &snat_main; - fib_prefix_t prefix = { - .fp_len = p_len, - .fp_proto = FIB_PROTOCOL_IP4, - .fp_addr = { - .ip4.as_u32 = addr->as_u32, - }, - }; - u32 fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); - - if (is_add) - fib_table_entry_update_one_path (fib_index, - &prefix, - sm->fib_src_low, - (FIB_ENTRY_FLAG_CONNECTED | - FIB_ENTRY_FLAG_LOCAL | - FIB_ENTRY_FLAG_EXCLUSIVE), - DPO_PROTO_IP4, - NULL, - sw_if_index, - ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE); - else - fib_table_entry_delete (fib_index, &prefix, sm->fib_src_low); -} - -int -snat_add_address (snat_main_t * sm, ip4_address_t * addr, u32 vrf_id, - u8 twice_nat) -{ - snat_address_t *ap; - snat_interface_t *i; - vlib_thread_main_t *tm = vlib_get_thread_main (); - - if (twice_nat && !sm->endpoint_dependent) - { - nat_log_err ("unsupported"); - return VNET_API_ERROR_UNSUPPORTED; - } - - /* Check if address already exists */ - /* *INDENT-OFF* */ - vec_foreach (ap, twice_nat ? sm->twice_nat_addresses : sm->addresses) - { - if (ap->addr.as_u32 == addr->as_u32) - { - nat_log_err ("address exist"); - return VNET_API_ERROR_VALUE_EXIST; - } - } - /* *INDENT-ON* */ - - if (twice_nat) - vec_add2 (sm->twice_nat_addresses, ap, 1); - else - vec_add2 (sm->addresses, ap, 1); - - ap->addr = *addr; - if (vrf_id != ~0) - ap->fib_index = - fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id, - sm->fib_src_low); - else - ap->fib_index = ~0; - - /* *INDENT-OFF* */ - #define _(N, i, n, s) \ - clib_memset(ap->busy_##n##_port_refcounts, 0, sizeof(ap->busy_##n##_port_refcounts));\ - ap->busy_##n##_ports = 0; \ - ap->busy_##n##_ports_per_thread = 0;\ - vec_validate_init_empty (ap->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0); - foreach_nat_protocol - #undef _ - /* *INDENT-ON* */ - - if (twice_nat) - return 0; - - /* Add external address to FIB */ - /* *INDENT-OFF* */ - pool_foreach (i, sm->interfaces) - { - if (nat_interface_is_inside(i) || sm->out2in_dpo) - continue; - - snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1); - break; - } - pool_foreach (i, sm->output_feature_interfaces) - { - if (nat_interface_is_inside(i) || sm->out2in_dpo) - continue; - - snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1); - break; - } - /* *INDENT-ON* */ - - return 0; -} - -static int -is_snat_address_used_in_static_mapping (snat_main_t * sm, ip4_address_t addr) -{ - snat_static_mapping_t *m; - /* *INDENT-OFF* */ - pool_foreach (m, sm->static_mappings) - { - if (is_addr_only_static_mapping (m) || - is_out2in_only_static_mapping (m) || - is_identity_static_mapping (m)) - continue; - if (m->external_addr.as_u32 == addr.as_u32) - return 1; - } - /* *INDENT-ON* */ - - return 0; -} - -static void -snat_add_static_mapping_when_resolved (snat_main_t *sm, ip4_address_t l_addr, - u16 l_port, u32 sw_if_index, u16 e_port, - u32 vrf_id, nat_protocol_t proto, - int addr_only, u8 *tag, int twice_nat, - int out2in_only, int identity_nat, - ip4_address_t pool_addr, int exact) -{ - snat_static_map_resolve_t *rp; - - vec_add2 (sm->to_resolve, rp, 1); - rp->l_addr.as_u32 = l_addr.as_u32; - rp->l_port = l_port; - rp->sw_if_index = sw_if_index; - rp->e_port = e_port; - rp->vrf_id = vrf_id; - rp->proto = proto; - rp->addr_only = addr_only; - rp->twice_nat = twice_nat; - rp->out2in_only = out2in_only; - rp->identity_nat = identity_nat; - rp->tag = vec_dup (tag); - rp->pool_addr = pool_addr; - rp->exact = exact; -} - -u32 -get_thread_idx_by_port (u16 e_port) -{ - snat_main_t *sm = &snat_main; - u32 thread_idx = sm->num_workers; - if (sm->num_workers > 1) - { - thread_idx = - sm->first_worker_index + - sm->workers[(e_port - 1024) / sm->port_per_thread]; - } - return thread_idx; -} - -void -nat_ed_static_mapping_del_sessions (snat_main_t * sm, - snat_main_per_thread_data_t * tsm, - ip4_address_t l_addr, - u16 l_port, - u8 protocol, - u32 fib_index, int addr_only, - ip4_address_t e_addr, u16 e_port) -{ - snat_session_t *s; - u32 *indexes_to_free = NULL; - /* *INDENT-OFF* */ - pool_foreach (s, tsm->sessions) { - if (s->in2out.fib_index != fib_index || - s->in2out.addr.as_u32 != l_addr.as_u32) - { - continue; - } - if (!addr_only) - { - if ((s->out2in.addr.as_u32 != e_addr.as_u32) || - s->out2in.port != e_port || - s->in2out.port != l_port || - s->nat_proto != protocol) - continue; - } - - if (is_lb_session (s)) - continue; - if (!snat_is_session_static (s)) - continue; - nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0); - vec_add1 (indexes_to_free, s - tsm->sessions); - if (!addr_only) - break; - } - /* *INDENT-ON* */ - u32 *ses_index; - vec_foreach (ses_index, indexes_to_free) - { - s = pool_elt_at_index (tsm->sessions, *ses_index); - nat_ed_session_delete (sm, s, tsm - sm->per_thread_data, 1); - } - vec_free (indexes_to_free); -} - -static_always_inline int -nat44_ed_add_del_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr, - u16 l_port, u16 e_port, u32 vrf_id, - int addr_only, u32 sw_if_index, - nat_protocol_t proto, int is_add, - twice_nat_type_t twice_nat, u8 out2in_only, - u8 *tag, u8 identity_nat, - ip4_address_t pool_addr, int exact) -{ - snat_main_t *sm = &snat_main; - snat_static_mapping_t *m; - clib_bihash_kv_8_8_t kv, value; - snat_address_t *a = 0; - u32 fib_index = ~0; - snat_interface_t *interface; - int i; - snat_main_per_thread_data_t *tsm; - snat_user_key_t u_key; - snat_user_t *u; - dlist_elt_t *head, *elt; - u32 elt_index, head_index; - u32 ses_index; - u64 user_index; - snat_session_t *s; - snat_static_map_resolve_t *rp, *rp_match = 0; - nat44_lb_addr_port_t *local; - u32 find = ~0; - - if (!sm->endpoint_dependent) - { - if (twice_nat || out2in_only) - return VNET_API_ERROR_UNSUPPORTED; - } - - /* If the external address is a specific interface address */ - if (sw_if_index != ~0) - { - ip4_address_t *first_int_addr; - - for (i = 0; i < vec_len (sm->to_resolve); i++) - { - rp = sm->to_resolve + i; - if (rp->sw_if_index != sw_if_index || - rp->l_addr.as_u32 != l_addr.as_u32 || - rp->vrf_id != vrf_id || rp->addr_only != addr_only) - continue; - - if (!addr_only) - { - if ((rp->l_port != l_port && rp->e_port != e_port) - || rp->proto != proto) - continue; - } - - rp_match = rp; - break; - } - - /* Might be already set... */ - first_int_addr = ip4_interface_first_address - (sm->ip4_main, sw_if_index, 0 /* just want the address */ ); - - if (is_add) - { - if (rp_match) - return VNET_API_ERROR_VALUE_EXIST; - - snat_add_static_mapping_when_resolved ( - sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto, addr_only, - tag, twice_nat, out2in_only, identity_nat, pool_addr, exact); - - /* DHCP resolution required? */ - if (first_int_addr == 0) - { - return 0; - } - else - { - e_addr.as_u32 = first_int_addr->as_u32; - /* Identity mapping? */ - if (l_addr.as_u32 == 0) - l_addr.as_u32 = e_addr.as_u32; - } - } - else - { - if (!rp_match) - return VNET_API_ERROR_NO_SUCH_ENTRY; - - vec_del1 (sm->to_resolve, i); - - if (first_int_addr) - { - e_addr.as_u32 = first_int_addr->as_u32; - /* Identity mapping? */ - if (l_addr.as_u32 == 0) - l_addr.as_u32 = e_addr.as_u32; - } - else - return 0; - } - } - - init_nat_k (&kv, e_addr, addr_only ? 0 : e_port, 0, addr_only ? 0 : proto); - if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) - m = 0; - else - m = pool_elt_at_index (sm->static_mappings, value.value); - - if (is_add) - { - if (m) - { - if (is_identity_static_mapping (m)) - { - /* *INDENT-OFF* */ - pool_foreach (local, m->locals) - { - if (local->vrf_id == vrf_id) - return VNET_API_ERROR_VALUE_EXIST; - } - /* *INDENT-ON* */ - pool_get (m->locals, local); - local->vrf_id = vrf_id; - local->fib_index = - fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id, - sm->fib_src_low); - init_nat_kv (&kv, m->local_addr, m->local_port, local->fib_index, - m->proto, 0, m - sm->static_mappings); - clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1); - return 0; - } - else - return VNET_API_ERROR_VALUE_EXIST; - } - - if (twice_nat && addr_only) - return VNET_API_ERROR_UNSUPPORTED; - - /* Convert VRF id to FIB index */ - if (vrf_id != ~0) - fib_index = - fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id, - sm->fib_src_low); - /* If not specified use inside VRF id from SNAT plugin startup config */ - else - { - fib_index = sm->inside_fib_index; - vrf_id = sm->inside_vrf_id; - fib_table_lock (fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); - } - - if (!(out2in_only || identity_nat)) - { - init_nat_k (&kv, l_addr, addr_only ? 0 : l_port, fib_index, - addr_only ? 0 : proto); - if (!clib_bihash_search_8_8 - (&sm->static_mapping_by_local, &kv, &value)) - return VNET_API_ERROR_VALUE_EXIST; - } - - /* Find external address in allocated addresses and reserve port for - address and port pair mapping when dynamic translations enabled */ - if (!(addr_only || sm->static_mapping_only || out2in_only)) - { - for (i = 0; i < vec_len (sm->addresses); i++) - { - if (sm->addresses[i].addr.as_u32 == e_addr.as_u32) - { - a = sm->addresses + i; - /* External port must be unused */ - switch (proto) - { -#define _(N, j, n, s) \ - case NAT_PROTOCOL_##N: \ - if (a->busy_##n##_port_refcounts[e_port]) \ - return VNET_API_ERROR_INVALID_VALUE; \ - ++a->busy_##n##_port_refcounts[e_port]; \ - if (e_port > 1024) \ - { \ - a->busy_##n##_ports++; \ - a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]++; \ - } \ - break; - foreach_nat_protocol -#undef _ - default: - nat_elog_info ("unknown protocol"); - return VNET_API_ERROR_INVALID_VALUE_2; - } - break; - } - } - /* External address must be allocated */ - if (!a && (l_addr.as_u32 != e_addr.as_u32)) - { - if (sw_if_index != ~0) - { - for (i = 0; i < vec_len (sm->to_resolve); i++) - { - rp = sm->to_resolve + i; - if (rp->addr_only) - continue; - if (rp->sw_if_index != sw_if_index && - rp->l_addr.as_u32 != l_addr.as_u32 && - rp->vrf_id != vrf_id && rp->l_port != l_port && - rp->e_port != e_port && rp->proto != proto) - continue; - - vec_del1 (sm->to_resolve, i); - break; - } - } - return VNET_API_ERROR_NO_SUCH_ENTRY; - } - } - - pool_get (sm->static_mappings, m); - clib_memset (m, 0, sizeof (*m)); - m->tag = vec_dup (tag); - m->local_addr = l_addr; - m->external_addr = e_addr; - m->twice_nat = twice_nat; - - if (twice_nat == TWICE_NAT && exact) - { - m->flags |= NAT_STATIC_MAPPING_FLAG_EXACT_ADDRESS; - m->pool_addr = pool_addr; - } - - if (out2in_only) - m->flags |= NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY; - if (addr_only) - m->flags |= NAT_STATIC_MAPPING_FLAG_ADDR_ONLY; - if (identity_nat) - { - m->flags |= NAT_STATIC_MAPPING_FLAG_IDENTITY_NAT; - pool_get (m->locals, local); - local->vrf_id = vrf_id; - local->fib_index = fib_index; - } - else - { - m->vrf_id = vrf_id; - m->fib_index = fib_index; - } - if (!addr_only) - { - m->local_port = l_port; - m->external_port = e_port; - m->proto = proto; - } - - if (sm->num_workers > 1) - { - ip4_header_t ip = { - .src_address = m->local_addr, - }; - vec_add1 (m->workers, sm->worker_in2out_cb (&ip, m->fib_index, 0)); - tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]); - } - else - tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); - - if (!out2in_only) - { - init_nat_kv (&kv, m->local_addr, m->local_port, fib_index, m->proto, - 0, m - sm->static_mappings); - clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1); - } - - init_nat_kv (&kv, m->external_addr, m->external_port, 0, m->proto, 0, - m - sm->static_mappings); - clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 1); - - /* Delete dynamic sessions matching local address (+ local port) */ - // TODO: based on type of NAT EI/ED - if (!(sm->static_mapping_only)) - { - u_key.addr = m->local_addr; - u_key.fib_index = m->fib_index; - kv.key = u_key.as_u64; - if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value)) - { - user_index = value.value; - u = pool_elt_at_index (tsm->users, user_index); - if (u->nsessions) - { - head_index = u->sessions_per_user_list_head_index; - head = pool_elt_at_index (tsm->list_pool, head_index); - elt_index = head->next; - elt = pool_elt_at_index (tsm->list_pool, elt_index); - ses_index = elt->value; - while (ses_index != ~0) - { - s = pool_elt_at_index (tsm->sessions, ses_index); - elt = pool_elt_at_index (tsm->list_pool, elt->next); - ses_index = elt->value; - - if (snat_is_session_static (s)) - continue; - - if (!addr_only && s->in2out.port != m->local_port) - continue; - - nat_free_session_data (sm, s, - tsm - sm->per_thread_data, 0); - nat44_delete_session (sm, s, tsm - sm->per_thread_data); - - if (!addr_only && !sm->endpoint_dependent) - break; - } - } - } - } - } - else - { - if (!m) - { - if (sw_if_index != ~0) - return 0; - else - return VNET_API_ERROR_NO_SUCH_ENTRY; - } - - if (identity_nat) - { - if (vrf_id == ~0) - vrf_id = sm->inside_vrf_id; - - /* *INDENT-OFF* */ - pool_foreach (local, m->locals) - { - if (local->vrf_id == vrf_id) - find = local - m->locals; - } - /* *INDENT-ON* */ - if (find == ~0) - return VNET_API_ERROR_NO_SUCH_ENTRY; - - local = pool_elt_at_index (m->locals, find); - fib_index = local->fib_index; - pool_put (m->locals, local); - } - else - fib_index = m->fib_index; - - /* Free external address port */ - if (!(addr_only || sm->static_mapping_only || out2in_only)) - { - for (i = 0; i < vec_len (sm->addresses); i++) - { - if (sm->addresses[i].addr.as_u32 == e_addr.as_u32) - { - a = sm->addresses + i; - switch (proto) - { -#define _(N, j, n, s) \ - case NAT_PROTOCOL_##N: \ - --a->busy_##n##_port_refcounts[e_port]; \ - if (e_port > 1024) \ - { \ - a->busy_##n##_ports--; \ - a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]--; \ - } \ - break; - foreach_nat_protocol -#undef _ - default: - nat_elog_info ("unknown protocol"); - return VNET_API_ERROR_INVALID_VALUE_2; - } - break; - } - } - } - - if (sm->num_workers > 1) - tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]); - else - tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); - - init_nat_k (&kv, m->local_addr, m->local_port, fib_index, m->proto); - if (!out2in_only) - clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 0); - - /* Delete session(s) for static mapping if exist */ - if (!(sm->static_mapping_only) || - (sm->static_mapping_only && sm->static_mapping_connection_tracking)) - { - if (sm->endpoint_dependent) - { - nat_ed_static_mapping_del_sessions (sm, tsm, m->local_addr, - m->local_port, m->proto, - fib_index, addr_only, - e_addr, e_port); - } - else - { - u_key.addr = m->local_addr; - u_key.fib_index = fib_index; - kv.key = u_key.as_u64; - nat44_ei_static_mapping_del_sessions (sm, tsm, u_key, addr_only, - e_addr, e_port); - } - } - - fib_table_unlock (fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); - if (pool_elts (m->locals)) - return 0; - - init_nat_k (&kv, m->external_addr, m->external_port, 0, m->proto); - clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 0); - - vec_free (m->tag); - vec_free (m->workers); - /* Delete static mapping from pool */ - pool_put (sm->static_mappings, m); - } - - if (!addr_only || (l_addr.as_u32 == e_addr.as_u32)) - return 0; - - /* Add/delete external address to FIB */ - /* *INDENT-OFF* */ - pool_foreach (interface, sm->interfaces) - { - if (nat_interface_is_inside(interface) || sm->out2in_dpo) - continue; - - snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add); - break; - } - pool_foreach (interface, sm->output_feature_interfaces) - { - if (nat_interface_is_inside(interface) || sm->out2in_dpo) - continue; - - snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add); - break; - } - /* *INDENT-ON* */ - - return 0; -} - -int -snat_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr, - u16 l_port, u16 e_port, u32 vrf_id, int addr_only, - u32 sw_if_index, nat_protocol_t proto, int is_add, - twice_nat_type_t twice_nat, u8 out2in_only, u8 *tag, - u8 identity_nat, ip4_address_t pool_addr, int exact) -{ - snat_main_t *sm = &snat_main; - int rv; - - if (sm->endpoint_dependent) - { - rv = nat44_ed_add_del_static_mapping ( - l_addr, e_addr, l_port, e_port, vrf_id, addr_only, sw_if_index, proto, - is_add, twice_nat, out2in_only, tag, identity_nat, pool_addr, exact); - } - else - { - rv = nat44_ei_add_del_static_mapping ( - l_addr, e_addr, l_port, e_port, proto, sw_if_index, vrf_id, addr_only, - identity_nat, tag, is_add); - } - return rv; -} - -int -nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port, - nat_protocol_t proto, - nat44_lb_addr_port_t * locals, u8 is_add, - twice_nat_type_t twice_nat, u8 out2in_only, - u8 * tag, u32 affinity) -{ - snat_main_t *sm = &snat_main; - snat_static_mapping_t *m; - clib_bihash_kv_8_8_t kv, value; - snat_address_t *a = 0; - int i; - nat44_lb_addr_port_t *local; - snat_main_per_thread_data_t *tsm; - snat_session_t *s; - uword *bitmap = 0; - - if (!sm->endpoint_dependent) - return VNET_API_ERROR_UNSUPPORTED; - - init_nat_k (&kv, e_addr, e_port, 0, proto); - if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) - m = 0; - else - m = pool_elt_at_index (sm->static_mappings, value.value); - - if (is_add) - { - if (m) - return VNET_API_ERROR_VALUE_EXIST; - - if (vec_len (locals) < 2) - return VNET_API_ERROR_INVALID_VALUE; - - /* Find external address in allocated addresses and reserve port for - address and port pair mapping when dynamic translations enabled */ - if (!(sm->static_mapping_only || out2in_only)) - { - for (i = 0; i < vec_len (sm->addresses); i++) - { - if (sm->addresses[i].addr.as_u32 == e_addr.as_u32) - { - a = sm->addresses + i; - /* External port must be unused */ - switch (proto) - { -#define _(N, j, n, s) \ - case NAT_PROTOCOL_##N: \ - if (a->busy_##n##_port_refcounts[e_port]) \ - return VNET_API_ERROR_INVALID_VALUE; \ - ++a->busy_##n##_port_refcounts[e_port]; \ - if (e_port > 1024) \ - { \ - a->busy_##n##_ports++; \ - a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]++; \ - } \ - break; - foreach_nat_protocol -#undef _ - default: - nat_elog_info ("unknown protocol"); - return VNET_API_ERROR_INVALID_VALUE_2; - } - break; - } - } - /* External address must be allocated */ - if (!a) - return VNET_API_ERROR_NO_SUCH_ENTRY; - } - - pool_get (sm->static_mappings, m); - clib_memset (m, 0, sizeof (*m)); - m->tag = vec_dup (tag); - m->external_addr = e_addr; - m->external_port = e_port; - m->proto = proto; - m->twice_nat = twice_nat; - m->flags |= NAT_STATIC_MAPPING_FLAG_LB; - if (out2in_only) - m->flags |= NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY; - m->affinity = affinity; - - if (affinity) - m->affinity_per_service_list_head_index = - nat_affinity_get_per_service_list_head_index (); - else - m->affinity_per_service_list_head_index = ~0; - - init_nat_kv (&kv, m->external_addr, m->external_port, 0, m->proto, 0, - m - sm->static_mappings); - if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 1)) - { - nat_elog_err ("static_mapping_by_external key add failed"); - return VNET_API_ERROR_UNSPECIFIED; - } - - for (i = 0; i < vec_len (locals); i++) - { - locals[i].fib_index = - fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, - locals[i].vrf_id, - sm->fib_src_low); - if (!out2in_only) - { - init_nat_kv (&kv, locals[i].addr, locals[i].port, - locals[i].fib_index, m->proto, 0, - m - sm->static_mappings); - clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1); - } - locals[i].prefix = (i == 0) ? locals[i].probability : - (locals[i - 1].prefix + locals[i].probability); - pool_get (m->locals, local); - *local = locals[i]; - if (sm->num_workers > 1) - { - ip4_header_t ip = { - .src_address = locals[i].addr, - }; - bitmap = - clib_bitmap_set (bitmap, - sm->worker_in2out_cb (&ip, m->fib_index, 0), - 1); - } - } - - /* Assign workers */ - if (sm->num_workers > 1) - { - /* *INDENT-OFF* */ - clib_bitmap_foreach (i, bitmap) - { - vec_add1(m->workers, i); - } - /* *INDENT-ON* */ - } - } - else - { - if (!m) - return VNET_API_ERROR_NO_SUCH_ENTRY; - - if (!is_lb_static_mapping (m)) - return VNET_API_ERROR_INVALID_VALUE; - - /* Free external address port */ - if (!(sm->static_mapping_only || out2in_only)) - { - for (i = 0; i < vec_len (sm->addresses); i++) - { - if (sm->addresses[i].addr.as_u32 == e_addr.as_u32) - { - a = sm->addresses + i; - switch (proto) - { -#define _(N, j, n, s) \ - case NAT_PROTOCOL_##N: \ - --a->busy_##n##_port_refcounts[e_port]; \ - if (e_port > 1024) \ - { \ - a->busy_##n##_ports--; \ - a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]--; \ - } \ - break; - foreach_nat_protocol -#undef _ - default: - nat_elog_info ("unknown protocol"); - return VNET_API_ERROR_INVALID_VALUE_2; - } - break; - } - } - } - - init_nat_k (&kv, m->external_addr, m->external_port, 0, m->proto); - if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 0)) - { - nat_elog_err ("static_mapping_by_external key del failed"); - return VNET_API_ERROR_UNSPECIFIED; - } - - /* *INDENT-OFF* */ - pool_foreach (local, m->locals) - { - fib_table_unlock (local->fib_index, FIB_PROTOCOL_IP4, - sm->fib_src_low); - if (!out2in_only) - { -init_nat_k(& kv, local->addr, local->port, local->fib_index, m->proto); - if (clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 0)) - { - nat_elog_err ("static_mapping_by_local key del failed"); - return VNET_API_ERROR_UNSPECIFIED; - } - } - - if (sm->num_workers > 1) - { - ip4_header_t ip = { - .src_address = local->addr, - }; - tsm = vec_elt_at_index (sm->per_thread_data, - sm->worker_in2out_cb (&ip, m->fib_index, 0)); - } - else - tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); - - /* Delete sessions */ - pool_foreach (s, tsm->sessions) { - if (!(is_lb_session (s))) - continue; - - if ((s->in2out.addr.as_u32 != local->addr.as_u32) || - s->in2out.port != local->port) - continue; - - nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0); - nat_ed_session_delete (sm, s, tsm - sm->per_thread_data, 1); - } - } - /* *INDENT-ON* */ - if (m->affinity) - nat_affinity_flush_service (m->affinity_per_service_list_head_index); - pool_free (m->locals); - vec_free (m->tag); - vec_free (m->workers); - - pool_put (sm->static_mappings, m); - } - - return 0; -} - -int -nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port, - ip4_address_t l_addr, u16 l_port, - nat_protocol_t proto, u32 vrf_id, - u8 probability, u8 is_add) -{ - snat_main_t *sm = &snat_main; - snat_static_mapping_t *m = 0; - clib_bihash_kv_8_8_t kv, value; - nat44_lb_addr_port_t *local, *prev_local, *match_local = 0; - snat_main_per_thread_data_t *tsm; - snat_session_t *s; - u32 *locals = 0; - uword *bitmap = 0; - int i; - - if (!sm->endpoint_dependent) - return VNET_API_ERROR_FEATURE_DISABLED; - - init_nat_k (&kv, e_addr, e_port, 0, proto); - if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) - m = pool_elt_at_index (sm->static_mappings, value.value); - - if (!m) - return VNET_API_ERROR_NO_SUCH_ENTRY; - - if (!is_lb_static_mapping (m)) - return VNET_API_ERROR_INVALID_VALUE; - - /* *INDENT-OFF* */ - pool_foreach (local, m->locals) - { - if ((local->addr.as_u32 == l_addr.as_u32) && (local->port == l_port) && - (local->vrf_id == vrf_id)) - { - match_local = local; - break; - } - } - /* *INDENT-ON* */ - - if (is_add) - { - if (match_local) - return VNET_API_ERROR_VALUE_EXIST; - - pool_get (m->locals, local); - clib_memset (local, 0, sizeof (*local)); - local->addr.as_u32 = l_addr.as_u32; - local->port = l_port; - local->probability = probability; - local->vrf_id = vrf_id; - local->fib_index = - fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id, - sm->fib_src_low); - - if (!is_out2in_only_static_mapping (m)) - { - init_nat_kv (&kv, l_addr, l_port, local->fib_index, proto, 0, - m - sm->static_mappings); - if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1)) - nat_elog_err ("static_mapping_by_local key add failed"); - } - } - else - { - if (!match_local) - return VNET_API_ERROR_NO_SUCH_ENTRY; - - if (pool_elts (m->locals) < 3) - return VNET_API_ERROR_UNSPECIFIED; - - fib_table_unlock (match_local->fib_index, FIB_PROTOCOL_IP4, - sm->fib_src_low); - - if (!is_out2in_only_static_mapping (m)) - { - init_nat_k (&kv, l_addr, l_port, match_local->fib_index, proto); - if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 0)) - nat_elog_err ("static_mapping_by_local key del failed"); - } - - if (sm->num_workers > 1) - { - ip4_header_t ip = { - .src_address = local->addr, - }; - tsm = vec_elt_at_index (sm->per_thread_data, - sm->worker_in2out_cb (&ip, m->fib_index, - 0)); - } - else - tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); - - /* Delete sessions */ - /* *INDENT-OFF* */ - pool_foreach (s, tsm->sessions) { - if (!(is_lb_session (s))) - continue; - - if ((s->in2out.addr.as_u32 != match_local->addr.as_u32) || - s->in2out.port != match_local->port) - continue; - - nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0); - nat_ed_session_delete (sm, s, tsm - sm->per_thread_data, 1); - } - /* *INDENT-ON* */ - - pool_put (m->locals, match_local); - } - - vec_free (m->workers); - - /* *INDENT-OFF* */ - pool_foreach (local, m->locals) - { - vec_add1 (locals, local - m->locals); - if (sm->num_workers > 1) - { - ip4_header_t ip; - ip.src_address.as_u32 = local->addr.as_u32, - bitmap = clib_bitmap_set (bitmap, - sm->worker_in2out_cb (&ip, local->fib_index, 0), - 1); - } - } - /* *INDENT-ON* */ - - ASSERT (vec_len (locals) > 1); - - local = pool_elt_at_index (m->locals, locals[0]); - local->prefix = local->probability; - for (i = 1; i < vec_len (locals); i++) - { - local = pool_elt_at_index (m->locals, locals[i]); - prev_local = pool_elt_at_index (m->locals, locals[i - 1]); - local->prefix = local->probability + prev_local->prefix; - } - - /* Assign workers */ - if (sm->num_workers > 1) - { - /* *INDENT-OFF* */ - clib_bitmap_foreach (i, bitmap) { vec_add1(m->workers, i); } - /* *INDENT-ON* */ - } - - return 0; -} - -int -snat_del_address (snat_main_t * sm, ip4_address_t addr, u8 delete_sm, - u8 twice_nat) -{ - snat_address_t *a = 0; - snat_session_t *ses; - u32 *ses_to_be_removed = 0, *ses_index; - snat_main_per_thread_data_t *tsm; - snat_static_mapping_t *m; - snat_interface_t *interface; - int i; - snat_address_t *addresses = - twice_nat ? sm->twice_nat_addresses : sm->addresses; - - /* Find SNAT address */ - for (i = 0; i < vec_len (addresses); i++) - { - if (addresses[i].addr.as_u32 == addr.as_u32) - { - a = addresses + i; - break; - } - } - if (!a) - { - nat_log_err ("no such address"); - return VNET_API_ERROR_NO_SUCH_ENTRY; - } - - if (delete_sm) - { - ip4_address_t pool_addr = { 0 }; - /* *INDENT-OFF* */ - pool_foreach (m, sm->static_mappings) - { - if (m->external_addr.as_u32 == addr.as_u32) - (void) snat_add_static_mapping (m->local_addr, m->external_addr, - m->local_port, m->external_port, - m->vrf_id, - is_addr_only_static_mapping(m), ~0, - m->proto, 0 /* is_add */, - m->twice_nat, - is_out2in_only_static_mapping(m), - m->tag, - is_identity_static_mapping(m), - pool_addr, 0); - } - /* *INDENT-ON* */ - } - else - { - /* Check if address is used in some static mapping */ - if (is_snat_address_used_in_static_mapping (sm, addr)) - { - nat_log_err ("address used in static mapping"); - return VNET_API_ERROR_UNSPECIFIED; - } - } - - if (a->fib_index != ~0) - fib_table_unlock (a->fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); - - /* Delete sessions using address */ - if (a->busy_tcp_ports || a->busy_udp_ports || a->busy_icmp_ports) - { - vec_foreach (tsm, sm->per_thread_data) - { - /* *INDENT-OFF* */ - pool_foreach (ses, tsm->sessions) { - if (ses->out2in.addr.as_u32 == addr.as_u32) - { - nat_free_session_data (sm, ses, tsm - sm->per_thread_data, 0); - vec_add1 (ses_to_be_removed, ses - tsm->sessions); - } - } - /* *INDENT-ON* */ - - if (sm->endpoint_dependent) - { - vec_foreach (ses_index, ses_to_be_removed) - { - ses = pool_elt_at_index (tsm->sessions, ses_index[0]); - nat_ed_session_delete (sm, ses, tsm - sm->per_thread_data, 1); - } - } - else - { - vec_foreach (ses_index, ses_to_be_removed) - { - ses = pool_elt_at_index (tsm->sessions, ses_index[0]); - nat44_delete_session (sm, ses, tsm - sm->per_thread_data); - } - } - - vec_free (ses_to_be_removed); - } - } - -#define _(N, i, n, s) \ - vec_free (a->busy_##n##_ports_per_thread); - foreach_nat_protocol -#undef _ - - if (twice_nat) - { - vec_del1 (sm->twice_nat_addresses, i); - return 0; - } - else vec_del1 (sm->addresses, i); - - /* Delete external address from FIB */ - pool_foreach (interface, sm->interfaces) - { - if (nat_interface_is_inside (interface) || sm->out2in_dpo) - continue; - - snat_add_del_addr_to_fib (&addr, 32, interface->sw_if_index, 0); - break; - } - - pool_foreach (interface, sm->output_feature_interfaces) - { - if (nat_interface_is_inside(interface) || sm->out2in_dpo) - continue; - - snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0); - break; - } - - return 0; -} - -static void -nat_validate_counters (snat_main_t * sm, u32 sw_if_index) -{ -#define _(x) \ - vlib_validate_simple_counter (&sm->counters.fastpath.in2out.x, \ - sw_if_index); \ - vlib_zero_simple_counter (&sm->counters.fastpath.in2out.x, sw_if_index); \ - vlib_validate_simple_counter (&sm->counters.fastpath.out2in.x, \ - sw_if_index); \ - vlib_zero_simple_counter (&sm->counters.fastpath.out2in.x, sw_if_index); \ - vlib_validate_simple_counter (&sm->counters.slowpath.in2out.x, \ - sw_if_index); \ - vlib_zero_simple_counter (&sm->counters.slowpath.in2out.x, sw_if_index); \ - vlib_validate_simple_counter (&sm->counters.slowpath.out2in.x, \ - sw_if_index); \ - vlib_zero_simple_counter (&sm->counters.slowpath.out2in.x, sw_if_index); \ - vlib_validate_simple_counter (&sm->counters.fastpath.in2out_ed.x, \ - sw_if_index); \ - vlib_zero_simple_counter (&sm->counters.fastpath.in2out_ed.x, sw_if_index); \ - vlib_validate_simple_counter (&sm->counters.fastpath.out2in_ed.x, \ - sw_if_index); \ - vlib_zero_simple_counter (&sm->counters.fastpath.out2in_ed.x, sw_if_index); \ - vlib_validate_simple_counter (&sm->counters.slowpath.in2out_ed.x, \ - sw_if_index); \ - vlib_zero_simple_counter (&sm->counters.slowpath.in2out_ed.x, sw_if_index); \ - vlib_validate_simple_counter (&sm->counters.slowpath.out2in_ed.x, \ - sw_if_index); \ - vlib_zero_simple_counter (&sm->counters.slowpath.out2in_ed.x, sw_if_index); - foreach_nat_counter; -#undef _ - vlib_validate_simple_counter (&sm->counters.hairpinning, sw_if_index); - vlib_zero_simple_counter (&sm->counters.hairpinning, sw_if_index); -} - -void -expire_per_vrf_sessions (u32 fib_index) -{ - per_vrf_sessions_t *per_vrf_sessions; - snat_main_per_thread_data_t *tsm; - snat_main_t *sm = &snat_main; - - /* *INDENT-OFF* */ - vec_foreach (tsm, sm->per_thread_data) - { - vec_foreach (per_vrf_sessions, tsm->per_vrf_sessions_vec) - { - if ((per_vrf_sessions->rx_fib_index == fib_index) || - (per_vrf_sessions->tx_fib_index == fib_index)) - { - per_vrf_sessions->expired = 1; - } - } - } - /* *INDENT-ON* */ -} - -void -update_per_vrf_sessions_vec (u32 fib_index, int is_del) -{ - snat_main_t *sm = &snat_main; - nat_fib_t *fib; - - // we don't care if it is outside/inside fib - // we just care about their ref_count - // if it reaches 0 sessions should expire - // because the fib isn't valid for NAT anymore - - vec_foreach (fib, sm->fibs) - { - if (fib->fib_index == fib_index) - { - if (is_del) - { - fib->ref_count--; - if (!fib->ref_count) - { - vec_del1 (sm->fibs, fib - sm->fibs); - expire_per_vrf_sessions (fib_index); - } - return; - } - else - fib->ref_count++; - } - } - if (!is_del) - { - vec_add2 (sm->fibs, fib, 1); - fib->ref_count = 1; - fib->fib_index = fib_index; - } -} - -int -snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del) -{ - snat_main_t *sm = &snat_main; - snat_interface_t *i; - const char *feature_name, *del_feature_name; - snat_address_t *ap; - snat_static_mapping_t *m; - nat_outside_fib_t *outside_fib; - u32 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index); - - if (!sm->enabled) - { - nat_log_err ("nat44 is disabled"); - return VNET_API_ERROR_UNSUPPORTED; - } - - if (sm->out2in_dpo && !is_inside) - { - nat_log_err ("error unsupported"); - return VNET_API_ERROR_UNSUPPORTED; - } - - /* *INDENT-OFF* */ - pool_foreach (i, sm->output_feature_interfaces) - { - if (i->sw_if_index == sw_if_index) - { - nat_log_err ("error interface already configured"); - return VNET_API_ERROR_VALUE_EXIST; - } - } - /* *INDENT-ON* */ - - if (sm->static_mapping_only && !(sm->static_mapping_connection_tracking)) - feature_name = is_inside ? "nat44-in2out-fast" : "nat44-out2in-fast"; - else - { - if (sm->num_workers > 1) - feature_name = - is_inside ? "nat44-in2out-worker-handoff" : - "nat44-out2in-worker-handoff"; - else if (sm->endpoint_dependent) - { - feature_name = is_inside ? "nat-pre-in2out" : "nat-pre-out2in"; - } - else - feature_name = is_inside ? "nat44-in2out" : "nat44-out2in"; - } - - ASSERT (sm->frame_queue_nelts > 0); - - if (sm->fq_in2out_index == ~0 && sm->num_workers > 1) - sm->fq_in2out_index = vlib_frame_queue_main_init (sm->in2out_node_index, - sm->frame_queue_nelts); - - if (sm->fq_out2in_index == ~0 && sm->num_workers > 1) - sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index, - sm->frame_queue_nelts); - - if (sm->endpoint_dependent) - update_per_vrf_sessions_vec (fib_index, is_del); - - if (!is_inside) - { - /* *INDENT-OFF* */ - vec_foreach (outside_fib, sm->outside_fibs) - { - if (outside_fib->fib_index == fib_index) - { - if (is_del) - { - outside_fib->refcount--; - if (!outside_fib->refcount) - vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs); - } - else - outside_fib->refcount++; - goto feature_set; - } - } - /* *INDENT-ON* */ - if (!is_del) - { - vec_add2 (sm->outside_fibs, outside_fib, 1); - outside_fib->refcount = 1; - outside_fib->fib_index = fib_index; - } - } - -feature_set: - /* *INDENT-OFF* */ - pool_foreach (i, sm->interfaces) - { - if (i->sw_if_index == sw_if_index) - { - if (is_del) - { - if (nat_interface_is_inside(i) && nat_interface_is_outside(i)) - { - if (is_inside) - i->flags &= ~NAT_INTERFACE_FLAG_IS_INSIDE; - else - i->flags &= ~NAT_INTERFACE_FLAG_IS_OUTSIDE; - - if (sm->num_workers > 1) - { - del_feature_name = "nat44-handoff-classify"; - feature_name = !is_inside ? "nat44-in2out-worker-handoff" : - "nat44-out2in-worker-handoff"; - } - else if (sm->endpoint_dependent) - { - del_feature_name = "nat44-ed-classify"; - feature_name = !is_inside ? "nat-pre-in2out" : - "nat-pre-out2in"; - } - else - { - del_feature_name = "nat44-classify"; - feature_name = !is_inside ? "nat44-in2out" : "nat44-out2in"; - } - - int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0); - if (rv) - return rv; - vnet_feature_enable_disable ("ip4-unicast", del_feature_name, - sw_if_index, 0, 0, 0); - vnet_feature_enable_disable ("ip4-unicast", feature_name, - sw_if_index, 1, 0, 0); - if (!is_inside) - { - if (!sm->endpoint_dependent) - vnet_feature_enable_disable ("ip4-local", - "nat44-hairpinning", - sw_if_index, 1, 0, 0); - } - } - else - { - int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0); - if (rv) - return rv; - vnet_feature_enable_disable ("ip4-unicast", feature_name, - sw_if_index, 0, 0, 0); - pool_put (sm->interfaces, i); - if (is_inside) - { - if (!sm->endpoint_dependent) - vnet_feature_enable_disable ("ip4-local", - "nat44-hairpinning", - sw_if_index, 0, 0, 0); - } - } - } - else - { - if ((nat_interface_is_inside (i) && is_inside) || - (nat_interface_is_outside (i) && !is_inside)) - return 0; - - if (sm->num_workers > 1) - { - del_feature_name = !is_inside ? "nat44-in2out-worker-handoff" : - "nat44-out2in-worker-handoff"; - feature_name = "nat44-handoff-classify"; - } - else if (sm->endpoint_dependent) - { - del_feature_name = - !is_inside ? "nat-pre-in2out" : "nat-pre-out2in"; - - feature_name = "nat44-ed-classify"; - } - else - { - del_feature_name = - !is_inside ? "nat44-in2out" : "nat44-out2in"; - feature_name = "nat44-classify"; - } - - int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1); - if (rv) - return rv; - vnet_feature_enable_disable ("ip4-unicast", del_feature_name, - sw_if_index, 0, 0, 0); - vnet_feature_enable_disable ("ip4-unicast", feature_name, - sw_if_index, 1, 0, 0); - if (!is_inside) - { - if (!sm->endpoint_dependent) - vnet_feature_enable_disable ( - "ip4-local", "nat44-hairpinning", sw_if_index, 0, 0, 0); - } - goto set_flags; - } - - goto fib; - } - } - /* *INDENT-ON* */ - - if (is_del) - { - nat_log_err ("error interface couldn't be found"); - return VNET_API_ERROR_NO_SUCH_ENTRY; - } - - pool_get (sm->interfaces, i); - i->sw_if_index = sw_if_index; - i->flags = 0; - nat_validate_counters (sm, sw_if_index); - - vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 1, 0, - 0); - - int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1); - if (rv) - return rv; - - if (is_inside && !sm->out2in_dpo) - { - if (!sm->endpoint_dependent) - vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning", - sw_if_index, 1, 0, 0); - } - -set_flags: - if (is_inside) - { - i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE; - return 0; - } - else - i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE; - - /* Add/delete external addresses to FIB */ -fib: - /* *INDENT-OFF* */ - vec_foreach (ap, sm->addresses) - snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del); - - pool_foreach (m, sm->static_mappings) - { - if (!(is_addr_only_static_mapping(m)) || (m->local_addr.as_u32 == m->external_addr.as_u32)) - continue; - - snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del); - } - /* *INDENT-ON* */ - - return 0; -} - -int -snat_interface_add_del_output_feature (u32 sw_if_index, - u8 is_inside, int is_del) -{ - snat_main_t *sm = &snat_main; - snat_interface_t *i; - snat_address_t *ap; - snat_static_mapping_t *m; - nat_outside_fib_t *outside_fib; - u32 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index); - - if (!sm->enabled) - { - nat_log_err ("nat44 is disabled"); - return VNET_API_ERROR_UNSUPPORTED; - } - - if (sm->static_mapping_only && !(sm->static_mapping_connection_tracking)) - { - nat_log_err ("error unsupported"); - return VNET_API_ERROR_UNSUPPORTED; - } - - /* *INDENT-OFF* */ - pool_foreach (i, sm->interfaces) - { - if (i->sw_if_index == sw_if_index) - { - nat_log_err ("error interface already configured"); - return VNET_API_ERROR_VALUE_EXIST; - } - } - /* *INDENT-ON* */ - - if (sm->endpoint_dependent) - update_per_vrf_sessions_vec (fib_index, is_del); - - if (!is_inside) - { - /* *INDENT-OFF* */ - vec_foreach (outside_fib, sm->outside_fibs) - { - if (outside_fib->fib_index == fib_index) - { - if (is_del) - { - outside_fib->refcount--; - if (!outside_fib->refcount) - vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs); - } - else - outside_fib->refcount++; - goto feature_set; - } - } - /* *INDENT-ON* */ - if (!is_del) - { - vec_add2 (sm->outside_fibs, outside_fib, 1); - outside_fib->refcount = 1; - outside_fib->fib_index = fib_index; - } - } - -feature_set: - if (is_inside) - { - if (sm->endpoint_dependent) - { - int rv = - ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, !is_del); - if (rv) - return rv; - rv = - ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, - !is_del); - if (rv) - return rv; - } - else - { - int rv = - ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, !is_del); - if (rv) - return rv; - rv = - ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, - !is_del); - if (rv) - return rv; - vnet_feature_enable_disable ("ip4-unicast", "nat44-hairpin-dst", - sw_if_index, !is_del, 0, 0); - vnet_feature_enable_disable ("ip4-output", "nat44-hairpin-src", - sw_if_index, !is_del, 0, 0); - } - goto fq; - } - - if (sm->num_workers > 1) - { - int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, !is_del); - if (rv) - return rv; - rv = - ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, !is_del); - if (rv) - return rv; - vnet_feature_enable_disable ("ip4-unicast", - "nat44-out2in-worker-handoff", - sw_if_index, !is_del, 0, 0); - vnet_feature_enable_disable ("ip4-output", - "nat44-in2out-output-worker-handoff", - sw_if_index, !is_del, 0, 0); - } - else - { - if (sm->endpoint_dependent) - { - int rv = - ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, !is_del); - if (rv) - return rv; - rv = - ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, - !is_del); - if (rv) - return rv; - vnet_feature_enable_disable ("ip4-unicast", "nat-pre-out2in", - sw_if_index, !is_del, 0, 0); - vnet_feature_enable_disable ("ip4-output", "nat-pre-in2out-output", - sw_if_index, !is_del, 0, 0); - } - else - { - int rv = - ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, !is_del); - if (rv) - return rv; - rv = - ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, - !is_del); - if (rv) - return rv; - vnet_feature_enable_disable ("ip4-unicast", "nat44-out2in", - sw_if_index, !is_del, 0, 0); - vnet_feature_enable_disable ("ip4-output", "nat44-in2out-output", - sw_if_index, !is_del, 0, 0); - } - } - -fq: - if (sm->fq_in2out_output_index == ~0 && sm->num_workers > 1) - sm->fq_in2out_output_index = - vlib_frame_queue_main_init (sm->in2out_output_node_index, 0); - - if (sm->fq_out2in_index == ~0 && sm->num_workers > 1) - sm->fq_out2in_index = - vlib_frame_queue_main_init (sm->out2in_node_index, 0); - - /* *INDENT-OFF* */ - pool_foreach (i, sm->output_feature_interfaces) - { - if (i->sw_if_index == sw_if_index) - { - if (is_del) - pool_put (sm->output_feature_interfaces, i); - else - return VNET_API_ERROR_VALUE_EXIST; - - goto fib; - } - } - /* *INDENT-ON* */ - - if (is_del) - { - nat_log_err ("error interface couldn't be found"); - return VNET_API_ERROR_NO_SUCH_ENTRY; - } - - pool_get (sm->output_feature_interfaces, i); - i->sw_if_index = sw_if_index; - i->flags = 0; - nat_validate_counters (sm, sw_if_index); - if (is_inside) - i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE; - else - i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE; - - /* Add/delete external addresses to FIB */ -fib: - if (is_inside) - return 0; - - /* *INDENT-OFF* */ - vec_foreach (ap, sm->addresses) - snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del); - - pool_foreach (m, sm->static_mappings) - { - if (!((is_addr_only_static_mapping(m))) || (m->local_addr.as_u32 == m->external_addr.as_u32)) - continue; - - snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del); - } - /* *INDENT-ON* */ - - return 0; -} - -int -snat_set_workers (uword * bitmap) -{ - snat_main_t *sm = &snat_main; - int i, j = 0; - - if (sm->num_workers < 2) - return VNET_API_ERROR_FEATURE_DISABLED; - - if (clib_bitmap_last_set (bitmap) >= sm->num_workers) - return VNET_API_ERROR_INVALID_WORKER; - - vec_free (sm->workers); - /* *INDENT-OFF* */ - clib_bitmap_foreach (i, bitmap) - { - vec_add1(sm->workers, i); - sm->per_thread_data[sm->first_worker_index + i].snat_thread_index = j; - sm->per_thread_data[sm->first_worker_index + i].thread_index = i; - j++; - } - /* *INDENT-ON* */ - - sm->port_per_thread = (0xffff - 1024) / _vec_len (sm->workers); - - return 0; -} - -int -snat_set_frame_queue_nelts (u32 frame_queue_nelts) -{ - fail_if_enabled (); - snat_main_t *sm = &snat_main; - sm->frame_queue_nelts = frame_queue_nelts; - return 0; -} - -static void -snat_update_outside_fib (ip4_main_t * im, uword opaque, - u32 sw_if_index, u32 new_fib_index, - u32 old_fib_index) -{ - snat_main_t *sm = &snat_main; - nat_outside_fib_t *outside_fib; - snat_interface_t *i; - u8 is_add = 1; - u8 match = 0; - - if (!sm->enabled || (new_fib_index == old_fib_index) - || (!vec_len (sm->outside_fibs))) - { - return; - } - - /* *INDENT-OFF* */ - pool_foreach (i, sm->interfaces) - { - if (i->sw_if_index == sw_if_index) - { - if (!(nat_interface_is_outside (i))) - return; - match = 1; - } - } - - pool_foreach (i, sm->output_feature_interfaces) - { - if (i->sw_if_index == sw_if_index) - { - if (!(nat_interface_is_outside (i))) - return; - match = 1; - } - } - /* *INDENT-ON* */ - - if (!match) - return; - - vec_foreach (outside_fib, sm->outside_fibs) - { - if (outside_fib->fib_index == old_fib_index) - { - outside_fib->refcount--; - if (!outside_fib->refcount) - vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs); - break; - } - } - - vec_foreach (outside_fib, sm->outside_fibs) - { - if (outside_fib->fib_index == new_fib_index) - { - outside_fib->refcount++; - is_add = 0; - break; - } - } - - if (is_add) - { - vec_add2 (sm->outside_fibs, outside_fib, 1); - outside_fib->refcount = 1; - outside_fib->fib_index = new_fib_index; - } -} - -static void -snat_update_outside_fib (ip4_main_t * im, uword opaque, - u32 sw_if_index, u32 new_fib_index, - u32 old_fib_index); - -static void -snat_ip4_add_del_interface_address_cb (ip4_main_t * im, - uword opaque, - u32 sw_if_index, - ip4_address_t * address, - u32 address_length, - u32 if_address_index, u32 is_delete); - -static void -nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im, - uword opaque, - u32 sw_if_index, - ip4_address_t * address, - u32 address_length, - u32 if_address_index, u32 is_delete); - -void -test_key_calc_split () -{ - ip4_address_t l_addr; - l_addr.as_u8[0] = 1; - l_addr.as_u8[1] = 1; - l_addr.as_u8[2] = 1; - l_addr.as_u8[3] = 1; - ip4_address_t r_addr; - r_addr.as_u8[0] = 2; - r_addr.as_u8[1] = 2; - r_addr.as_u8[2] = 2; - r_addr.as_u8[3] = 2; - u16 l_port = 40001; - u16 r_port = 40301; - u8 proto = 9; - u32 fib_index = 9000001; - u32 thread_index = 3000000001; - u32 session_index = 3000000221; - clib_bihash_kv_16_8_t kv; - init_ed_kv (&kv, l_addr, l_port, r_addr, r_port, fib_index, proto, - thread_index, session_index); - ip4_address_t l_addr2; - ip4_address_t r_addr2; - clib_memset (&l_addr2, 0, sizeof (l_addr2)); - clib_memset (&r_addr2, 0, sizeof (r_addr2)); - u16 l_port2 = 0; - u16 r_port2 = 0; - u8 proto2 = 0; - u32 fib_index2 = 0; - split_ed_kv (&kv, &l_addr2, &r_addr2, &proto2, &fib_index2, &l_port2, - &r_port2); - ASSERT (l_addr.as_u32 == l_addr2.as_u32); - ASSERT (r_addr.as_u32 == r_addr2.as_u32); - ASSERT (l_port == l_port2); - ASSERT (r_port == r_port2); - ASSERT (proto == proto2); - ASSERT (fib_index == fib_index2); - ASSERT (thread_index == ed_value_get_thread_index (&kv)); - ASSERT (session_index == ed_value_get_session_index (&kv)); - - fib_index = 7001; - proto = 5; - nat_protocol_t proto3 = ~0; - u64 key = calc_nat_key (l_addr, l_port, fib_index, proto); - split_nat_key (key, &l_addr2, &l_port2, &fib_index2, &proto3); - ASSERT (l_addr.as_u32 == l_addr2.as_u32); - ASSERT (l_port == l_port2); - ASSERT (proto == proto3); - ASSERT (fib_index == fib_index2); -} - -static clib_error_t * -nat_ip_table_add_del (vnet_main_t * vnm, u32 table_id, u32 is_add) -{ - snat_main_t *sm = &snat_main; - u32 fib_index; - - if (sm->endpoint_dependent) - { - // TODO: consider removing all NAT interfaces - if (!is_add) - { - fib_index = ip4_fib_index_from_table_id (table_id); - if (fib_index != ~0) - expire_per_vrf_sessions (fib_index); - } - } - return 0; -} - -VNET_IP_TABLE_ADD_DEL_FUNCTION (nat_ip_table_add_del); - -void -nat44_set_node_indexes (snat_main_t * sm, vlib_main_t * vm) -{ - vlib_node_t *node; - - node = vlib_get_node_by_name (vm, (u8 *) "nat44-out2in"); - sm->ei_out2in_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out"); - sm->ei_in2out_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-output"); - sm->ei_in2out_output_node_index = node->index; - - node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-out2in"); - sm->ed_out2in_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-in2out"); - sm->ed_in2out_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-in2out-output"); - sm->ed_in2out_output_node_index = node->index; - - node = vlib_get_node_by_name (vm, (u8 *) "error-drop"); - sm->error_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat-pre-in2out"); - sm->pre_in2out_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat-pre-out2in"); - sm->pre_out2in_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat-pre-in2out"); - sm->pre_in2out_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat-pre-out2in"); - sm->pre_out2in_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-fast"); - sm->in2out_fast_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-slowpath"); - sm->in2out_slowpath_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-in2out-output-slowpath"); - sm->in2out_slowpath_output_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-in2out-slowpath"); - sm->ed_in2out_slowpath_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-out2in-fast"); - sm->out2in_fast_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-out2in-slowpath"); - sm->ed_out2in_slowpath_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-hairpinning"); - sm->hairpinning_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-hairpin-dst"); - sm->hairpin_dst_node_index = node->index; - node = vlib_get_node_by_name (vm, (u8 *) "nat44-hairpin-src"); - sm->hairpin_src_node_index = node->index; -} - -#define nat_init_simple_counter(c, n, sn) \ -do \ - { \ - c.name = n; \ - c.stat_segment_name = sn; \ - vlib_validate_simple_counter (&c, 0); \ - vlib_zero_simple_counter (&c, 0); \ - } while (0); - -extern vlib_node_registration_t nat44_hairpinning_node; -extern vlib_node_registration_t snat_hairpin_dst_node; -extern vlib_node_registration_t - nat44_in2out_hairpinning_finish_ip4_lookup_node; -extern vlib_node_registration_t - nat44_in2out_hairpinning_finish_interface_output_node; - -static clib_error_t * -nat_init (vlib_main_t * vm) -{ - snat_main_t *sm = &snat_main; - vlib_thread_main_t *tm = vlib_get_thread_main (); - vlib_thread_registration_t *tr; - ip4_add_del_interface_address_callback_t cbi = { 0 }; - ip4_table_bind_callback_t cbt = { 0 }; - u32 i, num_threads = 0; - uword *p, *bitmap = 0; - - clib_memset (sm, 0, sizeof (*sm)); - - // required - sm->vnet_main = vnet_get_main (); - // convenience - sm->ip4_main = &ip4_main; - sm->api_main = vlibapi_get_main (); - sm->ip4_lookup_main = &ip4_main.lookup_main; - - // frame queue indices used for handoff - sm->fq_out2in_index = ~0; - sm->fq_in2out_index = ~0; - sm->fq_in2out_output_index = ~0; - - sm->log_level = SNAT_LOG_ERROR; - - nat44_set_node_indexes (sm, vm); - sm->log_class = vlib_log_register_class ("nat", 0); - nat_ipfix_logging_init (vm); - - nat_init_simple_counter (sm->total_users, "total-users", - "/nat44/total-users"); - nat_init_simple_counter (sm->total_sessions, "total-sessions", - "/nat44/total-sessions"); - nat_init_simple_counter (sm->user_limit_reached, "user-limit-reached", - "/nat44/user-limit-reached"); - -#define _(x) \ - sm->counters.fastpath.in2out.x.name = #x; \ - sm->counters.fastpath.in2out.x.stat_segment_name = \ - "/nat44/in2out/fastpath/" #x; \ - sm->counters.slowpath.in2out.x.name = #x; \ - sm->counters.slowpath.in2out.x.stat_segment_name = \ - "/nat44/in2out/slowpath/" #x; \ - sm->counters.fastpath.out2in.x.name = #x; \ - sm->counters.fastpath.out2in.x.stat_segment_name = \ - "/nat44/out2in/fastpath/" #x; \ - sm->counters.slowpath.out2in.x.name = #x; \ - sm->counters.slowpath.out2in.x.stat_segment_name = \ - "/nat44/out2in/slowpath/" #x; \ - sm->counters.fastpath.in2out_ed.x.name = #x; \ - sm->counters.fastpath.in2out_ed.x.stat_segment_name = \ - "/nat44/ed/in2out/fastpath/" #x; \ - sm->counters.slowpath.in2out_ed.x.name = #x; \ - sm->counters.slowpath.in2out_ed.x.stat_segment_name = \ - "/nat44/ed/in2out/slowpath/" #x; \ - sm->counters.fastpath.out2in_ed.x.name = #x; \ - sm->counters.fastpath.out2in_ed.x.stat_segment_name = \ - "/nat44/ed/out2in/fastpath/" #x; \ - sm->counters.slowpath.out2in_ed.x.name = #x; \ - sm->counters.slowpath.out2in_ed.x.stat_segment_name = \ - "/nat44/ed/out2in/slowpath/" #x; - foreach_nat_counter; -#undef _ - sm->counters.hairpinning.name = "hairpinning"; - sm->counters.hairpinning.stat_segment_name = "/nat44/hairpinning"; - - p = hash_get_mem (tm->thread_registrations_by_name, "workers"); - if (p) - { - tr = (vlib_thread_registration_t *) p[0]; - if (tr) - { - sm->num_workers = tr->count; - sm->first_worker_index = tr->first_index; - } - } - num_threads = tm->n_vlib_mains - 1; - sm->port_per_thread = 0xffff - 1024; - vec_validate (sm->per_thread_data, num_threads); - - /* Use all available workers by default */ - if (sm->num_workers > 1) - { - - for (i = 0; i < sm->num_workers; i++) - bitmap = clib_bitmap_set (bitmap, i, 1); - snat_set_workers (bitmap); - clib_bitmap_free (bitmap); - } - else - sm->per_thread_data[0].snat_thread_index = 0; - - /* callbacks to call when interface address changes. */ - cbi.function = snat_ip4_add_del_interface_address_cb; - vec_add1 (sm->ip4_main->add_del_interface_address_callbacks, cbi); - cbi.function = nat_ip4_add_del_addr_only_sm_cb; - vec_add1 (sm->ip4_main->add_del_interface_address_callbacks, cbi); - - /* callbacks to call when interface to table biding changes */ - cbt.function = snat_update_outside_fib; - vec_add1 (sm->ip4_main->table_bind_callbacks, cbt); - - sm->fib_src_low = - fib_source_allocate ("nat-low", FIB_SOURCE_PRIORITY_LOW, - FIB_SOURCE_BH_SIMPLE); - sm->fib_src_hi = - fib_source_allocate ("nat-hi", FIB_SOURCE_PRIORITY_HI, - FIB_SOURCE_BH_SIMPLE); - - /* used only by out2in-dpo feature */ - nat_dpo_module_init (); - - nat_affinity_init (vm); - nat_ha_init (vm, sm->num_workers, num_threads); - - test_key_calc_split (); - - sm->nat44_hairpinning_fq_index = - vlib_frame_queue_main_init (nat44_hairpinning_node.index, 0); - sm->snat_hairpin_dst_fq_index = - vlib_frame_queue_main_init (snat_hairpin_dst_node.index, 0); - sm->nat44_in2out_hairpinning_finish_ip4_lookup_node_fq_index = - vlib_frame_queue_main_init ( - nat44_in2out_hairpinning_finish_ip4_lookup_node.index, 0); - sm->nat44_in2out_hairpinning_finish_interface_output_node_fq_index = - vlib_frame_queue_main_init ( - nat44_in2out_hairpinning_finish_interface_output_node.index, 0); - return nat44_api_hookup (vm); -} - -VLIB_INIT_FUNCTION (nat_init); - -static int -nat44_ed_plugin_enable (nat44_config_t c) -{ - snat_main_t *sm = &snat_main; - - if (c.static_mapping_only && !c.connection_tracking) - { - nat_log_err ("unsupported combination of configuration"); - return 1; - } - - // nat44 feature configuration - sm->endpoint_dependent = c.endpoint_dependent; - sm->static_mapping_only = c.static_mapping_only; - sm->static_mapping_connection_tracking = c.connection_tracking; - - // EI only feature (could break ED) - sm->out2in_dpo = c.out2in_dpo; - - sm->forwarding_enabled = 0; - sm->mss_clamping = 0; - sm->pat = (!c.static_mapping_only || - (c.static_mapping_only && c.connection_tracking)); - - if (!c.users) - c.users = 1024; - - // EI only feature (could break ED) - sm->max_users_per_thread = c.users; - sm->user_buckets = nat_calc_bihash_buckets (c.users); - - if (!c.sessions) - c.sessions = 63 * 1024; - - sm->max_translations_per_thread = c.sessions; - sm->translation_buckets = nat_calc_bihash_buckets (c.sessions); - - // ED only feature - vec_add1 (sm->max_translations_per_fib, sm->max_translations_per_thread); - - // EI only feature (could break ED) - sm->max_translations_per_user - = c.user_sessions ? c.user_sessions : sm->max_translations_per_thread; - - sm->inside_vrf_id = c.inside_vrf; - sm->inside_fib_index = - fib_table_find_or_create_and_lock - (FIB_PROTOCOL_IP4, c.inside_vrf, sm->fib_src_hi); - - sm->outside_vrf_id = c.outside_vrf; - sm->outside_fib_index = fib_table_find_or_create_and_lock ( - FIB_PROTOCOL_IP4, c.outside_vrf, sm->fib_src_hi); - - sm->worker_in2out_cb = nat44_ed_get_worker_in2out_cb; - sm->worker_out2in_cb = nat44_ed_get_worker_out2in_cb; - - sm->in2out_node_index = sm->ed_in2out_node_index; - sm->out2in_node_index = sm->ed_out2in_node_index; - - sm->in2out_output_node_index = sm->ed_in2out_output_node_index; - - if (sm->pat) - { - sm->icmp_match_in2out_cb = NULL; - sm->icmp_match_out2in_cb = NULL; - } - else - { - sm->icmp_match_in2out_cb = icmp_match_in2out_fast; - sm->icmp_match_out2in_cb = icmp_match_out2in_fast; - } - - nat44_ed_db_init (sm->max_translations_per_thread, sm->translation_buckets, - sm->user_buckets); - - nat_affinity_enable (); - - nat_reset_timeouts (&sm->timeouts); - - // TODO: function for reset counters - vlib_zero_simple_counter (&sm->total_users, 0); - vlib_zero_simple_counter (&sm->total_sessions, 0); - vlib_zero_simple_counter (&sm->user_limit_reached, 0); - - if (!sm->frame_queue_nelts) - sm->frame_queue_nelts = NAT_FQ_NELTS_DEFAULT; - - sm->enabled = 1; - sm->rconfig = c; - - return 0; -} - -int -nat44_plugin_enable (nat44_config_t c) -{ - fail_if_enabled (); - - // c.static_mapping_only + c.connection_tracking - // - supported in NAT EI & NAT ED - // c.out2in_dpo, c.static_mapping_only - // - supported in NAT EI - - if (c.endpoint_dependent) - { - if (c.out2in_dpo || c.users || c.user_sessions) - { - nat_log_err ("unsupported combination of configuration"); - return 1; - } - return nat44_ed_plugin_enable (c); - } - - // separation: - // for now just copy variables - - nat44_ei_config_t ei_c = { - .inside_vrf = c.inside_vrf, - .outside_vrf = c.outside_vrf, - .users = c.users, - .sessions = c.sessions, - .user_sessions = c.user_sessions, - .out2in_dpo = c.out2in_dpo, - .static_mapping_only = c.static_mapping_only, - .connection_tracking = c.connection_tracking, - }; - - return nat44_ei_plugin_enable (ei_c); -} - -void -nat44_addresses_free (snat_address_t ** addresses) -{ - snat_address_t *ap; - /* *INDENT-OFF* */ - vec_foreach (ap, *addresses) - { - #define _(N, i, n, s) \ - vec_free (ap->busy_##n##_ports_per_thread); - foreach_nat_protocol - #undef _ - } - /* *INDENT-ON* */ - vec_free (*addresses); - *addresses = 0; -} - -static int -nat44_ed_plugin_disable () -{ - snat_main_t *sm = &snat_main; - snat_interface_t *i, *vec; - int error = 0; - - // first unregister all nodes from interfaces - vec = vec_dup (sm->interfaces); - /* *INDENT-OFF* */ - vec_foreach (i, vec) - { - if (nat_interface_is_inside(i)) - error = snat_interface_add_del (i->sw_if_index, 1, 1); - if (nat_interface_is_outside(i)) - error = snat_interface_add_del (i->sw_if_index, 0, 1); - - if (error) - { - nat_log_err ("error occurred while removing interface %u", - i->sw_if_index); - } - } - /* *INDENT-ON* */ - vec_free (vec); - sm->interfaces = 0; - - vec = vec_dup (sm->output_feature_interfaces); - /* *INDENT-OFF* */ - vec_foreach (i, vec) - { - if (nat_interface_is_inside(i)) - error = snat_interface_add_del_output_feature (i->sw_if_index, 1, 1); - if (nat_interface_is_outside(i)) - error = snat_interface_add_del_output_feature (i->sw_if_index, 0, 1); - - if (error) - { - nat_log_err ("error occurred while removing interface %u", - i->sw_if_index); - } - } - /* *INDENT-ON* */ - vec_free (vec); - sm->output_feature_interfaces = 0; - - vec_free (sm->max_translations_per_fib); - - nat44_ed_db_free (); - - nat44_addresses_free (&sm->addresses); - nat44_addresses_free (&sm->twice_nat_addresses); - - - vec_free (sm->to_resolve); - vec_free (sm->auto_add_sw_if_indices); - vec_free (sm->auto_add_sw_if_indices_twice_nat); - - sm->to_resolve = 0; - sm->auto_add_sw_if_indices = 0; - sm->auto_add_sw_if_indices_twice_nat = 0; - - sm->forwarding_enabled = 0; - - sm->enabled = 0; - clib_memset (&sm->rconfig, 0, sizeof (sm->rconfig)); - - return 0; -} - -int -nat44_plugin_disable () -{ - snat_main_t *sm = &snat_main; - - fail_if_disabled (); - - if (sm->endpoint_dependent) - return nat44_ed_plugin_disable (); - return nat44_ei_plugin_disable (); -} - -void -snat_free_outside_address_and_port (snat_address_t *addresses, - u32 thread_index, ip4_address_t *addr, - u16 port, nat_protocol_t protocol) -{ - snat_address_t *a; - u32 address_index; - u16 port_host_byte_order = clib_net_to_host_u16 (port); - - for (address_index = 0; address_index < vec_len (addresses); - address_index++) - { - if (addresses[address_index].addr.as_u32 == addr->as_u32) - break; - } - - ASSERT (address_index < vec_len (addresses)); - - a = addresses + address_index; - - switch (protocol) - { -#define _(N, i, n, s) \ - case NAT_PROTOCOL_##N: \ - ASSERT (a->busy_##n##_port_refcounts[port_host_byte_order] >= 1); \ - --a->busy_##n##_port_refcounts[port_host_byte_order]; \ - a->busy_##n##_ports--; \ - a->busy_##n##_ports_per_thread[thread_index]--; \ - break; - foreach_nat_protocol -#undef _ - default: - nat_elog_info ("unknown protocol"); - return; - } -} - -int -nat_set_outside_address_and_port (snat_address_t *addresses, u32 thread_index, - ip4_address_t addr, u16 port, - nat_protocol_t protocol) -{ - snat_address_t *a = 0; - u32 address_index; - u16 port_host_byte_order = clib_net_to_host_u16 (port); - - for (address_index = 0; address_index < vec_len (addresses); - address_index++) - { - if (addresses[address_index].addr.as_u32 != addr.as_u32) - continue; - - a = addresses + address_index; - switch (protocol) - { -#define _(N, j, n, s) \ - case NAT_PROTOCOL_##N: \ - if (a->busy_##n##_port_refcounts[port_host_byte_order]) \ - return VNET_API_ERROR_INSTANCE_IN_USE; \ - ++a->busy_##n##_port_refcounts[port_host_byte_order]; \ - a->busy_##n##_ports_per_thread[thread_index]++; \ - a->busy_##n##_ports++; \ - return 0; - foreach_nat_protocol -#undef _ - default: - nat_elog_info ("unknown protocol"); - return 1; - } - } - - return VNET_API_ERROR_NO_SUCH_ENTRY; -} - -int -snat_static_mapping_match (snat_main_t * sm, - ip4_address_t match_addr, - u16 match_port, - u32 match_fib_index, - nat_protocol_t match_protocol, - ip4_address_t * mapping_addr, - u16 * mapping_port, - u32 * mapping_fib_index, - u8 by_external, - u8 * is_addr_only, - twice_nat_type_t * twice_nat, - lb_nat_type_t * lb, ip4_address_t * ext_host_addr, - u8 * is_identity_nat, snat_static_mapping_t ** out) -{ - clib_bihash_kv_8_8_t kv, value; - clib_bihash_8_8_t *mapping_hash; - snat_static_mapping_t *m; - u32 rand, lo = 0, hi, mid, *tmp = 0, i; - nat44_lb_addr_port_t *local; - u8 backend_index; - - if (!by_external) - { - mapping_hash = &sm->static_mapping_by_local; - init_nat_k (&kv, match_addr, match_port, match_fib_index, - match_protocol); - if (clib_bihash_search_8_8 (mapping_hash, &kv, &value)) - { - /* Try address only mapping */ - init_nat_k (&kv, match_addr, 0, match_fib_index, 0); - if (clib_bihash_search_8_8 (mapping_hash, &kv, &value)) - return 1; - } - } - else - { - mapping_hash = &sm->static_mapping_by_external; - init_nat_k (&kv, match_addr, match_port, 0, match_protocol); - if (clib_bihash_search_8_8 (mapping_hash, &kv, &value)) - { - /* Try address only mapping */ - init_nat_k (&kv, match_addr, 0, 0, 0); - if (clib_bihash_search_8_8 (mapping_hash, &kv, &value)) - return 1; - } - } - - m = pool_elt_at_index (sm->static_mappings, value.value); - - if (by_external) - { - if (is_lb_static_mapping (m)) - { - if (PREDICT_FALSE (lb != 0)) - *lb = m->affinity ? AFFINITY_LB_NAT : LB_NAT; - if (m->affinity && !nat_affinity_find_and_lock (ext_host_addr[0], - match_addr, - match_protocol, - match_port, - &backend_index)) - { - local = pool_elt_at_index (m->locals, backend_index); - *mapping_addr = local->addr; - *mapping_port = local->port; - *mapping_fib_index = local->fib_index; - goto end; - } - // pick locals matching this worker - if (PREDICT_FALSE (sm->num_workers > 1)) - { - u32 thread_index = vlib_get_thread_index (); - /* *INDENT-OFF* */ - pool_foreach_index (i, m->locals) - { - local = pool_elt_at_index (m->locals, i); - - ip4_header_t ip = { - .src_address = local->addr, - }; - - if (sm->worker_in2out_cb (&ip, m->fib_index, 0) == - thread_index) - { - vec_add1 (tmp, i); - } - } - /* *INDENT-ON* */ - ASSERT (vec_len (tmp) != 0); - } - else - { - /* *INDENT-OFF* */ - pool_foreach_index (i, m->locals) - { - vec_add1 (tmp, i); - } - /* *INDENT-ON* */ - } - hi = vec_len (tmp) - 1; - local = pool_elt_at_index (m->locals, tmp[hi]); - rand = 1 + (random_u32 (&sm->random_seed) % local->prefix); - while (lo < hi) - { - mid = ((hi - lo) >> 1) + lo; - local = pool_elt_at_index (m->locals, tmp[mid]); - (rand > local->prefix) ? (lo = mid + 1) : (hi = mid); - } - local = pool_elt_at_index (m->locals, tmp[lo]); - if (!(local->prefix >= rand)) - return 1; - *mapping_addr = local->addr; - *mapping_port = local->port; - *mapping_fib_index = local->fib_index; - if (m->affinity) - { - if (nat_affinity_create_and_lock (ext_host_addr[0], match_addr, - match_protocol, match_port, - tmp[lo], m->affinity, - m->affinity_per_service_list_head_index)) - nat_elog_info ("create affinity record failed"); - } - vec_free (tmp); - } - else - { - if (PREDICT_FALSE (lb != 0)) - *lb = NO_LB_NAT; - *mapping_fib_index = m->fib_index; - *mapping_addr = m->local_addr; - /* Address only mapping doesn't change port */ - *mapping_port = is_addr_only_static_mapping (m) ? match_port - : m->local_port; - } - } - else - { - *mapping_addr = m->external_addr; - /* Address only mapping doesn't change port */ - *mapping_port = is_addr_only_static_mapping (m) ? match_port - : m->external_port; - *mapping_fib_index = sm->outside_fib_index; - } - -end: - if (PREDICT_FALSE (is_addr_only != 0)) - *is_addr_only = is_addr_only_static_mapping (m); - - if (PREDICT_FALSE (twice_nat != 0)) - *twice_nat = m->twice_nat; - - if (PREDICT_FALSE (is_identity_nat != 0)) - *is_identity_nat = is_identity_static_mapping (m); - - if (out != 0) - *out = m; - - return 0; -} - -void -nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add) -{ - snat_main_t *sm = &snat_main; - dpo_id_t dpo_v4 = DPO_INVALID; - fib_prefix_t pfx = { - .fp_proto = FIB_PROTOCOL_IP4, - .fp_len = 32, - .fp_addr.ip4.as_u32 = addr.as_u32, - }; - - if (is_add) - { - nat_dpo_create (DPO_PROTO_IP4, 0, &dpo_v4); - fib_table_entry_special_dpo_add (0, &pfx, sm->fib_src_hi, - FIB_ENTRY_FLAG_EXCLUSIVE, &dpo_v4); - dpo_reset (&dpo_v4); - } - else - { - fib_table_entry_special_remove (0, &pfx, sm->fib_src_hi); - } -} - -static u32 -nat44_ed_get_worker_in2out_cb (ip4_header_t *ip, u32 rx_fib_index, - u8 is_output) -{ - snat_main_t *sm = &snat_main; - u32 next_worker_index = sm->first_worker_index; - u32 hash; - - clib_bihash_kv_16_8_t kv16, value16; - snat_main_per_thread_data_t *tsm; - udp_header_t *udp; - - if (PREDICT_FALSE (is_output)) - { - u32 fib_index = sm->outside_fib_index; - nat_outside_fib_t *outside_fib; - fib_node_index_t fei = FIB_NODE_INDEX_INVALID; - fib_prefix_t pfx = { - .fp_proto = FIB_PROTOCOL_IP4, - .fp_len = 32, - .fp_addr = { - .ip4.as_u32 = ip->dst_address.as_u32, - } - , - }; - - udp = ip4_next_header (ip); - - switch (vec_len (sm->outside_fibs)) - { - case 0: - fib_index = sm->outside_fib_index; - break; - case 1: - 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) - { - fib_index = outside_fib->fib_index; - break; - } - } - } - /* *INDENT-ON* */ - break; - } - - init_ed_k (&kv16, ip->src_address, udp->src_port, ip->dst_address, - udp->dst_port, fib_index, ip->protocol); - - if (PREDICT_TRUE ( - !clib_bihash_search_16_8 (&sm->flow_hash, &kv16, &value16))) - { - tsm = - vec_elt_at_index (sm->per_thread_data, - ed_value_get_thread_index (&value16)); - next_worker_index += tsm->thread_index; - - nat_elog_debug_handoff ("HANDOFF IN2OUT-OUTPUT-FEATURE (session)", - next_worker_index, fib_index, - clib_net_to_host_u32 (ip-> - src_address.as_u32), - clib_net_to_host_u32 (ip-> - dst_address.as_u32)); - - return next_worker_index; - } - } - - hash = ip->src_address.as_u32 + (ip->src_address.as_u32 >> 8) + - (ip->src_address.as_u32 >> 16) + (ip->src_address.as_u32 >> 24); - - if (PREDICT_TRUE (is_pow2 (_vec_len (sm->workers)))) - next_worker_index += sm->workers[hash & (_vec_len (sm->workers) - 1)]; - else - next_worker_index += sm->workers[hash % _vec_len (sm->workers)]; - - if (PREDICT_TRUE (!is_output)) - { - nat_elog_debug_handoff ("HANDOFF IN2OUT", - next_worker_index, rx_fib_index, - clib_net_to_host_u32 (ip->src_address.as_u32), - clib_net_to_host_u32 (ip->dst_address.as_u32)); - } - else - { - nat_elog_debug_handoff ("HANDOFF IN2OUT-OUTPUT-FEATURE", - next_worker_index, rx_fib_index, - clib_net_to_host_u32 (ip->src_address.as_u32), - clib_net_to_host_u32 (ip->dst_address.as_u32)); - } - - return next_worker_index; -} - -static u32 -nat44_ed_get_worker_out2in_cb (vlib_buffer_t * b, ip4_header_t * ip, - u32 rx_fib_index, u8 is_output) -{ - snat_main_t *sm = &snat_main; - clib_bihash_kv_8_8_t kv, value; - clib_bihash_kv_16_8_t kv16, value16; - snat_main_per_thread_data_t *tsm; - - u32 proto, next_worker_index = 0; - udp_header_t *udp; - u16 port; - snat_static_mapping_t *m; - u32 hash; - - proto = ip_proto_to_nat_proto (ip->protocol); - - if (PREDICT_TRUE (proto == NAT_PROTOCOL_UDP || proto == NAT_PROTOCOL_TCP)) - { - udp = ip4_next_header (ip); - - init_ed_k (&kv16, ip->dst_address, udp->dst_port, ip->src_address, - udp->src_port, rx_fib_index, ip->protocol); - - if (PREDICT_TRUE ( - !clib_bihash_search_16_8 (&sm->flow_hash, &kv16, &value16))) - { - tsm = - vec_elt_at_index (sm->per_thread_data, - ed_value_get_thread_index (&value16)); - vnet_buffer2 (b)->nat.cached_session_index = - ed_value_get_session_index (&value16); - next_worker_index = sm->first_worker_index + tsm->thread_index; - nat_elog_debug_handoff ("HANDOFF OUT2IN (session)", - next_worker_index, rx_fib_index, - clib_net_to_host_u32 (ip-> - src_address.as_u32), - clib_net_to_host_u32 (ip-> - dst_address.as_u32)); - return next_worker_index; - } - } - else if (proto == NAT_PROTOCOL_ICMP) - { - ip4_address_t lookup_saddr, lookup_daddr; - u16 lookup_sport, lookup_dport; - u8 lookup_protocol; - if (!nat_get_icmp_session_lookup_values ( - b, ip, &lookup_saddr, &lookup_sport, &lookup_daddr, &lookup_dport, - &lookup_protocol)) - { - init_ed_k (&kv16, lookup_saddr, lookup_sport, lookup_daddr, - lookup_dport, rx_fib_index, lookup_protocol); - if (PREDICT_TRUE ( - !clib_bihash_search_16_8 (&sm->flow_hash, &kv16, &value16))) - { - tsm = - vec_elt_at_index (sm->per_thread_data, - ed_value_get_thread_index (&value16)); - next_worker_index = sm->first_worker_index + tsm->thread_index; - nat_elog_debug_handoff ("HANDOFF OUT2IN (session)", - next_worker_index, rx_fib_index, - clib_net_to_host_u32 (ip-> - src_address.as_u32), - clib_net_to_host_u32 (ip-> - dst_address.as_u32)); - return next_worker_index; - } - } - } - - /* first try static mappings without port */ - if (PREDICT_FALSE (pool_elts (sm->static_mappings))) - { - init_nat_k (&kv, ip->dst_address, 0, 0, 0); - if (!clib_bihash_search_8_8 - (&sm->static_mapping_by_external, &kv, &value)) - { - m = pool_elt_at_index (sm->static_mappings, value.value); - next_worker_index = m->workers[0]; - goto done; - } - } - - /* unknown protocol */ - if (PREDICT_FALSE (proto == NAT_PROTOCOL_OTHER)) - { - /* use current thread */ - next_worker_index = vlib_get_thread_index (); - goto done; - } - - udp = ip4_next_header (ip); - port = udp->dst_port; - - if (PREDICT_FALSE (ip->protocol == IP_PROTOCOL_ICMP)) - { - icmp46_header_t *icmp = (icmp46_header_t *) udp; - icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1); - if (!icmp_type_is_error_message - (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)) - port = vnet_buffer (b)->ip.reass.l4_src_port; - else - { - /* if error message, then it's not fragmented and we can access it */ - ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1); - proto = ip_proto_to_nat_proto (inner_ip->protocol); - void *l4_header = ip4_next_header (inner_ip); - switch (proto) - { - case NAT_PROTOCOL_ICMP: - icmp = (icmp46_header_t *) l4_header; - echo = (icmp_echo_header_t *) (icmp + 1); - port = echo->identifier; - break; - case NAT_PROTOCOL_UDP: - case NAT_PROTOCOL_TCP: - port = ((tcp_udp_header_t *) l4_header)->src_port; - break; - default: - next_worker_index = vlib_get_thread_index (); - goto done; - } - } - } - - /* try static mappings with port */ - if (PREDICT_FALSE (pool_elts (sm->static_mappings))) - { - init_nat_k (&kv, ip->dst_address, port, 0, proto); - if (!clib_bihash_search_8_8 - (&sm->static_mapping_by_external, &kv, &value)) - { - m = pool_elt_at_index (sm->static_mappings, value.value); - if (!is_lb_static_mapping (m)) - { - next_worker_index = m->workers[0]; - goto done; - } - - hash = ip->src_address.as_u32 + (ip->src_address.as_u32 >> 8) + - (ip->src_address.as_u32 >> 16) + (ip->src_address.as_u32 >> 24); - - if (PREDICT_TRUE (is_pow2 (_vec_len (m->workers)))) - next_worker_index = - m->workers[hash & (_vec_len (m->workers) - 1)]; - else - next_worker_index = m->workers[hash % _vec_len (m->workers)]; - goto done; - } - } - - /* worker by outside port */ - next_worker_index = sm->first_worker_index; - next_worker_index += - sm->workers[(clib_net_to_host_u16 (port) - 1024) / sm->port_per_thread]; - -done: - nat_elog_debug_handoff ("HANDOFF OUT2IN", next_worker_index, rx_fib_index, - clib_net_to_host_u32 (ip->src_address.as_u32), - clib_net_to_host_u32 (ip->dst_address.as_u32)); - return next_worker_index; -} - -u32 -nat_calc_bihash_buckets (u32 n_elts) -{ - n_elts = n_elts / 2.5; - u64 lower_pow2 = 1; - while (lower_pow2 * 2 < n_elts) - { - lower_pow2 = 2 * lower_pow2; - } - u64 upper_pow2 = 2 * lower_pow2; - if ((upper_pow2 - n_elts) < (n_elts - lower_pow2)) - { - if (upper_pow2 <= UINT32_MAX) - { - return upper_pow2; - } - } - return lower_pow2; -} - -u32 -nat44_get_max_session_limit () -{ - snat_main_t *sm = &snat_main; - u32 max_limit = 0, len = 0; - - for (; len < vec_len (sm->max_translations_per_fib); len++) - { - if (max_limit < sm->max_translations_per_fib[len]) - max_limit = sm->max_translations_per_fib[len]; - } - return max_limit; -} - -int -nat44_set_session_limit (u32 session_limit, u32 vrf_id) -{ - snat_main_t *sm = &snat_main; - u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id); - u32 len = vec_len (sm->max_translations_per_fib); - - if (len <= fib_index) - { - vec_validate (sm->max_translations_per_fib, fib_index + 1); - - for (; len < vec_len (sm->max_translations_per_fib); len++) - sm->max_translations_per_fib[len] = sm->max_translations_per_thread; - } - - sm->max_translations_per_fib[fib_index] = session_limit; - return 0; -} - -int -nat44_update_session_limit (u32 session_limit, u32 vrf_id) -{ - snat_main_t *sm = &snat_main; - - if (nat44_set_session_limit (session_limit, vrf_id)) - return 1; - sm->max_translations_per_thread = nat44_get_max_session_limit (); - - sm->translation_buckets = - nat_calc_bihash_buckets (sm->max_translations_per_thread); - - nat44_sessions_clear (); - return 0; -} - -static void -nat44_ed_worker_db_init (snat_main_per_thread_data_t *tsm, u32 translations, - u32 translation_buckets, u32 user_buckets) -{ - dlist_elt_t *head; - - pool_alloc (tsm->sessions, translations); - pool_alloc (tsm->lru_pool, translations); - - pool_get (tsm->lru_pool, head); - tsm->tcp_trans_lru_head_index = head - tsm->lru_pool; - clib_dlist_init (tsm->lru_pool, tsm->tcp_trans_lru_head_index); - - pool_get (tsm->lru_pool, head); - tsm->tcp_estab_lru_head_index = head - tsm->lru_pool; - clib_dlist_init (tsm->lru_pool, tsm->tcp_estab_lru_head_index); - - pool_get (tsm->lru_pool, head); - tsm->udp_lru_head_index = head - tsm->lru_pool; - clib_dlist_init (tsm->lru_pool, tsm->udp_lru_head_index); - - pool_get (tsm->lru_pool, head); - tsm->icmp_lru_head_index = head - tsm->lru_pool; - clib_dlist_init (tsm->lru_pool, tsm->icmp_lru_head_index); - - pool_get (tsm->lru_pool, head); - tsm->unk_proto_lru_head_index = head - tsm->lru_pool; - clib_dlist_init (tsm->lru_pool, tsm->unk_proto_lru_head_index); - - // TODO: ED nat is not using these - // before removal large refactor required - pool_alloc (tsm->list_pool, translations); - clib_bihash_init_8_8 (&tsm->user_hash, "users", user_buckets, 0); - clib_bihash_set_kvp_format_fn_8_8 (&tsm->user_hash, format_user_kvp); -} - -static void -reinit_ed_flow_hash () -{ - snat_main_t *sm = &snat_main; - // we expect 2 flows per session, so multiply translation_buckets by 2 - clib_bihash_init_16_8 ( - &sm->flow_hash, "ed-flow-hash", - clib_max (1, sm->num_workers) * 2 * sm->translation_buckets, 0); - clib_bihash_set_kvp_format_fn_16_8 (&sm->flow_hash, format_ed_session_kvp); -} - -static void -nat44_ed_db_init (u32 translations, u32 translation_buckets, u32 user_buckets) -{ - snat_main_t *sm = &snat_main; - snat_main_per_thread_data_t *tsm; - u32 static_mapping_buckets = 1024; - u32 static_mapping_memory_size = 64 << 20; - - reinit_ed_flow_hash (); - - clib_bihash_init_8_8 (&sm->static_mapping_by_local, - "static_mapping_by_local", static_mapping_buckets, - static_mapping_memory_size); - clib_bihash_set_kvp_format_fn_8_8 (&sm->static_mapping_by_local, - format_static_mapping_kvp); - - clib_bihash_init_8_8 (&sm->static_mapping_by_external, - "static_mapping_by_external", static_mapping_buckets, - static_mapping_memory_size); - clib_bihash_set_kvp_format_fn_8_8 (&sm->static_mapping_by_external, - format_static_mapping_kvp); - - if (sm->pat) - { - vec_foreach (tsm, sm->per_thread_data) - { - nat44_ed_worker_db_init (tsm, sm->max_translations_per_thread, - sm->translation_buckets, sm->user_buckets); - } - } -} - -static void -nat44_ed_worker_db_free (snat_main_per_thread_data_t *tsm) -{ - pool_free (tsm->sessions); - pool_free (tsm->lru_pool); - - vec_free (tsm->per_vrf_sessions_vec); - - // TODO: resolve static mappings (put only to !ED) - pool_free (tsm->list_pool); - pool_free (tsm->users); - clib_bihash_free_8_8 (&tsm->user_hash); -} - -static void -nat44_ed_db_free () -{ - snat_main_t *sm = &snat_main; - snat_main_per_thread_data_t *tsm; - - pool_free (sm->static_mappings); - clib_bihash_free_16_8 (&sm->flow_hash); - clib_bihash_free_8_8 (&sm->static_mapping_by_local); - clib_bihash_free_8_8 (&sm->static_mapping_by_external); - - if (sm->pat) - { - vec_foreach (tsm, sm->per_thread_data) - { - nat44_ed_worker_db_free (tsm); - } - } -} - -void -nat44_ed_sessions_clear () -{ - snat_main_t *sm = &snat_main; - snat_main_per_thread_data_t *tsm; - - reinit_ed_flow_hash (); - - if (sm->pat) - { - vec_foreach (tsm, sm->per_thread_data) - { - - nat44_ed_worker_db_free (tsm); - nat44_ed_worker_db_init (tsm, sm->max_translations_per_thread, - sm->translation_buckets, sm->user_buckets); - } - } - - // TODO: function for reset counters - vlib_zero_simple_counter (&sm->total_users, 0); - vlib_zero_simple_counter (&sm->total_sessions, 0); - vlib_zero_simple_counter (&sm->user_limit_reached, 0); -} - -void -nat44_sessions_clear () -{ - snat_main_t *sm = &snat_main; - - if (sm->endpoint_dependent) - nat44_ed_sessions_clear (); - else - nat44_ei_sessions_clear (); -} - -static void -nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im, - uword opaque, - u32 sw_if_index, - ip4_address_t * address, - u32 address_length, - u32 if_address_index, u32 is_delete) -{ - snat_main_t *sm = &snat_main; - snat_static_map_resolve_t *rp; - snat_static_mapping_t *m; - clib_bihash_kv_8_8_t kv, value; - int i, rv; - ip4_address_t l_addr; - - if (!sm->enabled) - return; - - for (i = 0; i < vec_len (sm->to_resolve); i++) - { - rp = sm->to_resolve + i; - if (rp->addr_only == 0) - continue; - if (rp->sw_if_index == sw_if_index) - goto match; - } - - return; - -match: - init_nat_k (&kv, *address, rp->addr_only ? 0 : rp->e_port, - sm->outside_fib_index, rp->addr_only ? 0 : rp->proto); - if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) - m = 0; - else - m = pool_elt_at_index (sm->static_mappings, value.value); - - if (!is_delete) - { - /* Don't trip over lease renewal, static config */ - if (m) - return; - } - else - { - if (!m) - return; - } - - /* Indetity mapping? */ - if (rp->l_addr.as_u32 == 0) - l_addr.as_u32 = address[0].as_u32; - else - l_addr.as_u32 = rp->l_addr.as_u32; - /* Add the static mapping */ - rv = snat_add_static_mapping (l_addr, - address[0], - rp->l_port, - rp->e_port, - rp->vrf_id, - rp->addr_only, ~0 /* sw_if_index */ , - rp->proto, !is_delete, rp->twice_nat, - rp->out2in_only, rp->tag, rp->identity_nat, - rp->pool_addr, rp->exact); - if (rv) - nat_elog_notice_X1 ("snat_add_static_mapping returned %d", "i4", rv); -} - -static void -snat_ip4_add_del_interface_address_cb (ip4_main_t * im, - uword opaque, - u32 sw_if_index, - ip4_address_t * address, - u32 address_length, - u32 if_address_index, u32 is_delete) -{ - snat_main_t *sm = &snat_main; - snat_static_map_resolve_t *rp; - ip4_address_t l_addr; - int i, j; - int rv; - u8 twice_nat = 0; - snat_address_t *addresses = sm->addresses; - - if (!sm->enabled) - return; - - for (i = 0; i < vec_len (sm->auto_add_sw_if_indices); i++) - { - if (sw_if_index == sm->auto_add_sw_if_indices[i]) - goto match; - } - - for (i = 0; i < vec_len (sm->auto_add_sw_if_indices_twice_nat); i++) - { - twice_nat = 1; - addresses = sm->twice_nat_addresses; - if (sw_if_index == sm->auto_add_sw_if_indices_twice_nat[i]) - goto match; - } - - return; - -match: - if (!is_delete) - { - /* Don't trip over lease renewal, static config */ - for (j = 0; j < vec_len (addresses); j++) - if (addresses[j].addr.as_u32 == address->as_u32) - return; - - (void) snat_add_address (sm, address, ~0, twice_nat); - /* Scan static map resolution vector */ - for (j = 0; j < vec_len (sm->to_resolve); j++) - { - rp = sm->to_resolve + j; - if (rp->addr_only) - continue; - /* On this interface? */ - if (rp->sw_if_index == sw_if_index) - { - /* Indetity mapping? */ - if (rp->l_addr.as_u32 == 0) - l_addr.as_u32 = address[0].as_u32; - else - l_addr.as_u32 = rp->l_addr.as_u32; - /* Add the static mapping */ - rv = snat_add_static_mapping ( - l_addr, address[0], rp->l_port, rp->e_port, rp->vrf_id, - rp->addr_only, ~0 /* sw_if_index */, rp->proto, 1, - rp->twice_nat, rp->out2in_only, rp->tag, rp->identity_nat, - rp->pool_addr, rp->exact); - if (rv) - nat_elog_notice_X1 ("snat_add_static_mapping returned %d", - "i4", rv); - } - } - return; - } - else - { - (void) snat_del_address (sm, address[0], 1, twice_nat); - return; - } -} - -int -snat_add_interface_address (snat_main_t * sm, u32 sw_if_index, int is_del, - u8 twice_nat) -{ - ip4_main_t *ip4_main = sm->ip4_main; - ip4_address_t *first_int_addr; - snat_static_map_resolve_t *rp; - u32 *indices_to_delete = 0; - int i, j; - u32 *auto_add_sw_if_indices = - twice_nat ? sm-> - auto_add_sw_if_indices_twice_nat : sm->auto_add_sw_if_indices; - - first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0 /* just want the address */ - ); - - for (i = 0; i < vec_len (auto_add_sw_if_indices); i++) - { - if (auto_add_sw_if_indices[i] == sw_if_index) - { - if (is_del) - { - /* if have address remove it */ - if (first_int_addr) - (void) snat_del_address (sm, first_int_addr[0], 1, twice_nat); - else - { - for (j = 0; j < vec_len (sm->to_resolve); j++) - { - rp = sm->to_resolve + j; - if (rp->sw_if_index == sw_if_index) - vec_add1 (indices_to_delete, j); - } - if (vec_len (indices_to_delete)) - { - for (j = vec_len (indices_to_delete) - 1; j >= 0; j--) - vec_del1 (sm->to_resolve, j); - vec_free (indices_to_delete); - } - } - if (twice_nat) - vec_del1 (sm->auto_add_sw_if_indices_twice_nat, i); - else - vec_del1 (sm->auto_add_sw_if_indices, i); - } - else - return VNET_API_ERROR_VALUE_EXIST; - - return 0; - } - } - - if (is_del) - return VNET_API_ERROR_NO_SUCH_ENTRY; - - /* add to the auto-address list */ - if (twice_nat) - vec_add1 (sm->auto_add_sw_if_indices_twice_nat, sw_if_index); - else - vec_add1 (sm->auto_add_sw_if_indices, sw_if_index); - - /* If the address is already bound - or static - add it now */ - if (first_int_addr) - (void) snat_add_address (sm, first_int_addr, ~0, twice_nat); - - return 0; -} - -int -nat44_del_ed_session (snat_main_t * sm, ip4_address_t * addr, u16 port, - ip4_address_t * eh_addr, u16 eh_port, u8 proto, - u32 vrf_id, int is_in) -{ - ip4_header_t ip; - clib_bihash_kv_16_8_t kv, value; - u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id); - snat_session_t *s; - snat_main_per_thread_data_t *tsm; - - if (!sm->endpoint_dependent) - return VNET_API_ERROR_FEATURE_DISABLED; - - ip.dst_address.as_u32 = ip.src_address.as_u32 = addr->as_u32; - if (sm->num_workers > 1) - tsm = - vec_elt_at_index (sm->per_thread_data, - sm->worker_in2out_cb (&ip, fib_index, 0)); - else - tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); - - init_ed_k (&kv, *addr, port, *eh_addr, eh_port, fib_index, proto); - if (clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) - { - return VNET_API_ERROR_NO_SUCH_ENTRY; - } - - if (pool_is_free_index (tsm->sessions, ed_value_get_session_index (&value))) - return VNET_API_ERROR_UNSPECIFIED; - s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value)); - nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0); - nat_ed_session_delete (sm, s, tsm - sm->per_thread_data, 1); - return 0; -} - -VLIB_NODE_FN (nat_default_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - return 0; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (nat_default_node) = { - .name = "nat-default", - .vector_size = sizeof (u32), - .format_trace = 0, - .type = VLIB_NODE_TYPE_INTERNAL, - .n_errors = 0, - .n_next_nodes = NAT_N_NEXT, - .next_nodes = { - [NAT_NEXT_DROP] = "error-drop", - [NAT_NEXT_ICMP_ERROR] = "ip4-icmp-error", - [NAT_NEXT_IN2OUT_ED_FAST_PATH] = "nat44-ed-in2out", - [NAT_NEXT_IN2OUT_ED_SLOW_PATH] = "nat44-ed-in2out-slowpath", - [NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH] = "nat44-ed-in2out-output", - [NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath", - [NAT_NEXT_OUT2IN_ED_FAST_PATH] = "nat44-ed-out2in", - [NAT_NEXT_OUT2IN_ED_SLOW_PATH] = "nat44-ed-out2in-slowpath", - [NAT_NEXT_IN2OUT_CLASSIFY] = "nat44-in2out-worker-handoff", - [NAT_NEXT_OUT2IN_CLASSIFY] = "nat44-out2in-worker-handoff", - }, -}; -/* *INDENT-ON* */ - -void -nat_6t_l3_l4_csum_calc (nat_6t_flow_t *f) -{ - f->l3_csum_delta = 0; - f->l4_csum_delta = 0; - if (f->ops & NAT_FLOW_OP_SADDR_REWRITE && - f->rewrite.saddr.as_u32 != f->match.saddr.as_u32) - { - f->l3_csum_delta = - ip_csum_add_even (f->l3_csum_delta, f->rewrite.saddr.as_u32); - f->l3_csum_delta = - ip_csum_sub_even (f->l3_csum_delta, f->match.saddr.as_u32); - } - else - { - f->rewrite.saddr.as_u32 = f->match.saddr.as_u32; - } - if (f->ops & NAT_FLOW_OP_DADDR_REWRITE && - f->rewrite.daddr.as_u32 != f->match.daddr.as_u32) - { - f->l3_csum_delta = - ip_csum_add_even (f->l3_csum_delta, f->rewrite.daddr.as_u32); - f->l3_csum_delta = - ip_csum_sub_even (f->l3_csum_delta, f->match.daddr.as_u32); - } - else - { - f->rewrite.daddr.as_u32 = f->match.daddr.as_u32; - } - if (f->ops & NAT_FLOW_OP_SPORT_REWRITE && f->rewrite.sport != f->match.sport) - { - f->l4_csum_delta = ip_csum_add_even (f->l4_csum_delta, f->rewrite.sport); - f->l4_csum_delta = ip_csum_sub_even (f->l4_csum_delta, f->match.sport); - } - else - { - f->rewrite.sport = f->match.sport; - } - if (f->ops & NAT_FLOW_OP_DPORT_REWRITE && f->rewrite.dport != f->match.dport) - { - f->l4_csum_delta = ip_csum_add_even (f->l4_csum_delta, f->rewrite.dport); - f->l4_csum_delta = ip_csum_sub_even (f->l4_csum_delta, f->match.dport); - } - else - { - f->rewrite.dport = f->match.dport; - } - if (f->ops & NAT_FLOW_OP_ICMP_ID_REWRITE && - f->rewrite.icmp_id != f->match.icmp_id) - { - f->l4_csum_delta = - ip_csum_add_even (f->l4_csum_delta, f->rewrite.icmp_id); - f->l4_csum_delta = ip_csum_sub_even (f->l4_csum_delta, f->match.icmp_id); - } - else - { - f->rewrite.icmp_id = f->match.icmp_id; - } - if (f->ops & NAT_FLOW_OP_TXFIB_REWRITE) - { - } - else - { - f->rewrite.fib_index = f->match.fib_index; - } -} - -static_always_inline int nat_6t_flow_icmp_translate (snat_main_t *sm, - vlib_buffer_t *b, - ip4_header_t *ip, - nat_6t_flow_t *f); - -static_always_inline void -nat_6t_flow_ip4_translate (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, - nat_6t_flow_t *f, nat_protocol_t proto, - int is_icmp_inner_ip4) -{ - udp_header_t *udp = ip4_next_header (ip); - tcp_header_t *tcp = (tcp_header_t *) udp; - - if ((NAT_PROTOCOL_TCP == proto || NAT_PROTOCOL_UDP == proto) && - !vnet_buffer (b)->ip.reass.is_non_first_fragment) - { - if (!is_icmp_inner_ip4) - { // regular case - ip->src_address = f->rewrite.saddr; - ip->dst_address = f->rewrite.daddr; - udp->src_port = f->rewrite.sport; - udp->dst_port = f->rewrite.dport; - } - else - { // icmp inner ip4 - reversed saddr/daddr - ip->src_address = f->rewrite.daddr; - ip->dst_address = f->rewrite.saddr; - udp->src_port = f->rewrite.dport; - udp->dst_port = f->rewrite.sport; - } - - if (NAT_PROTOCOL_TCP == proto) - { - ip_csum_t tcp_sum = tcp->checksum; - tcp_sum = ip_csum_sub_even (tcp_sum, f->l3_csum_delta); - tcp_sum = ip_csum_sub_even (tcp_sum, f->l4_csum_delta); - mss_clamping (sm->mss_clamping, tcp, &tcp_sum); - tcp->checksum = ip_csum_fold (tcp_sum); - } - else if (proto == NAT_PROTOCOL_UDP && udp->checksum) - { - ip_csum_t udp_sum = udp->checksum; - udp_sum = ip_csum_sub_even (udp_sum, f->l3_csum_delta); - udp_sum = ip_csum_sub_even (udp_sum, f->l4_csum_delta); - udp->checksum = ip_csum_fold (udp_sum); - } - } - else - { - if (!is_icmp_inner_ip4) - { // regular case - ip->src_address = f->rewrite.saddr; - ip->dst_address = f->rewrite.daddr; - } - else - { // icmp inner ip4 - reversed saddr/daddr - ip->src_address = f->rewrite.daddr; - ip->dst_address = f->rewrite.saddr; - } - } - - ip_csum_t ip_sum = ip->checksum; - ip_sum = ip_csum_sub_even (ip_sum, f->l3_csum_delta); - ip->checksum = ip_csum_fold (ip_sum); - ASSERT (ip->checksum == ip4_header_checksum (ip)); -} - -static_always_inline int -nat_6t_flow_icmp_translate (snat_main_t *sm, vlib_buffer_t *b, - ip4_header_t *ip, nat_6t_flow_t *f) -{ - if (IP_PROTOCOL_ICMP != ip->protocol) - return NAT_ED_TRNSL_ERR_TRANSLATION_FAILED; - - icmp46_header_t *icmp = ip4_next_header (ip); - icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1); - - if ((!vnet_buffer (b)->ip.reass.is_non_first_fragment)) - { - if (icmp->checksum == 0) - icmp->checksum = 0xffff; - - if (!icmp_type_is_error_message (icmp->type)) - { - if ((f->ops & NAT_FLOW_OP_ICMP_ID_REWRITE) && - (f->rewrite.icmp_id != echo->identifier)) - { - ip_csum_t sum = icmp->checksum; - sum = ip_csum_update (sum, echo->identifier, f->rewrite.icmp_id, - icmp_echo_header_t, - identifier /* changed member */); - echo->identifier = f->rewrite.icmp_id; - icmp->checksum = ip_csum_fold (sum); - } - } - else - { - // errors are not fragmented - ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1); - - if (!ip4_header_checksum_is_valid (inner_ip)) - { - return NAT_ED_TRNSL_ERR_TRANSLATION_FAILED; - } - - nat_protocol_t inner_proto = - ip_proto_to_nat_proto (inner_ip->protocol); - - ip_csum_t icmp_sum = icmp->checksum; - - switch (inner_proto) - { - case NAT_PROTOCOL_UDP: - case NAT_PROTOCOL_TCP: - nat_6t_flow_ip4_translate (sm, b, inner_ip, f, inner_proto, - 1 /* is_icmp_inner_ip4 */); - icmp_sum = ip_csum_sub_even (icmp_sum, f->l3_csum_delta); - icmp->checksum = ip_csum_fold (icmp_sum); - break; - case NAT_PROTOCOL_ICMP: - if (f->ops & NAT_FLOW_OP_ICMP_ID_REWRITE) - { - icmp46_header_t *inner_icmp = ip4_next_header (inner_ip); - icmp_echo_header_t *inner_echo = - (icmp_echo_header_t *) (inner_icmp + 1); - if (f->rewrite.icmp_id != inner_echo->identifier) - { - ip_csum_t sum = icmp->checksum; - sum = ip_csum_update ( - sum, inner_echo->identifier, f->rewrite.icmp_id, - icmp_echo_header_t, identifier /* changed member */); - icmp->checksum = ip_csum_fold (sum); - ip_csum_t inner_sum = inner_icmp->checksum; - inner_sum = ip_csum_update ( - sum, inner_echo->identifier, f->rewrite.icmp_id, - icmp_echo_header_t, identifier /* changed member */); - inner_icmp->checksum = ip_csum_fold (inner_sum); - inner_echo->identifier = f->rewrite.icmp_id; - } - } - break; - default: - clib_warning ("unexpected NAT protocol value `%d'", inner_proto); - return NAT_ED_TRNSL_ERR_TRANSLATION_FAILED; - } - } - } - return NAT_ED_TRNSL_ERR_SUCCESS; -} - -nat_translation_error_e -nat_6t_flow_buf_translate (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, - nat_6t_flow_t *f, nat_protocol_t proto, - int is_output_feature) -{ - if (!is_output_feature && f->ops & NAT_FLOW_OP_TXFIB_REWRITE) - { - vnet_buffer (b)->sw_if_index[VLIB_TX] = f->rewrite.fib_index; - } - - nat_6t_flow_ip4_translate (sm, b, ip, f, proto, 0 /* is_icmp_inner_ip4 */); - - if (NAT_PROTOCOL_ICMP == proto) - { - return nat_6t_flow_icmp_translate (sm, b, ip, f); - } - - return NAT_ED_TRNSL_ERR_SUCCESS; -} - -u8 * -format_nat_6t (u8 *s, va_list *args) -{ - nat_6t_t *t = va_arg (*args, nat_6t_t *); - - s = format (s, "saddr %U sport %u daddr %U dport %u proto %U fib_idx %u", - format_ip4_address, t->saddr.as_u8, - clib_net_to_host_u16 (t->sport), format_ip4_address, - t->daddr.as_u8, clib_net_to_host_u16 (t->dport), - format_ip_protocol, t->proto, t->fib_index); - return s; -} - -u8 * -format_nat_ed_translation_error (u8 *s, va_list *args) -{ - nat_translation_error_e e = va_arg (*args, nat_translation_error_e); - - switch (e) - { - case NAT_ED_TRNSL_ERR_SUCCESS: - s = format (s, "success"); - break; - case NAT_ED_TRNSL_ERR_TRANSLATION_FAILED: - s = format (s, "translation-failed"); - break; - case NAT_ED_TRNSL_ERR_FLOW_MISMATCH: - s = format (s, "flow-mismatch"); - break; - } - return s; -} - -u8 * -format_nat_6t_flow (u8 *s, va_list *args) -{ - nat_6t_flow_t *f = va_arg (*args, nat_6t_flow_t *); - - s = format (s, "match: %U ", format_nat_6t, &f->match); - int r = 0; - if (f->ops & NAT_FLOW_OP_SADDR_REWRITE) - { - s = format (s, "rewrite: saddr %U ", format_ip4_address, - f->rewrite.saddr.as_u8); - r = 1; - } - if (f->ops & NAT_FLOW_OP_SPORT_REWRITE) - { - if (!r) - { - s = format (s, "rewrite: "); - r = 1; - } - s = format (s, "sport %u ", clib_net_to_host_u16 (f->rewrite.sport)); - } - if (f->ops & NAT_FLOW_OP_DADDR_REWRITE) - { - if (!r) - { - s = format (s, "rewrite: "); - r = 1; - } - s = format (s, "daddr %U ", format_ip4_address, f->rewrite.daddr.as_u8); - } - if (f->ops & NAT_FLOW_OP_DPORT_REWRITE) - { - if (!r) - { - s = format (s, "rewrite: "); - r = 1; - } - s = format (s, "dport %u ", clib_net_to_host_u16 (f->rewrite.dport)); - } - if (f->ops & NAT_FLOW_OP_ICMP_ID_REWRITE) - { - if (!r) - { - s = format (s, "rewrite: "); - r = 1; - } - s = format (s, "icmp-id %u ", clib_net_to_host_u16 (f->rewrite.icmp_id)); - } - if (f->ops & NAT_FLOW_OP_TXFIB_REWRITE) - { - if (!r) - { - s = format (s, "rewrite: "); - r = 1; - } - s = format (s, "txfib %u ", f->rewrite.fib_index); - } - return s; -} - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |