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authorFilip Varga <fivarga@cisco.com>2021-02-17 14:34:54 +0100
committerOle Tr�an <otroan@employees.org>2021-02-24 19:25:25 +0000
commit0eaf4e6784efb2d058fe2f031578251b6bcc0aa8 (patch)
treecc0c2b485bfee51068fa4970acc9f95ec595e8e5 /src/plugins/nat/nat.c
parent5db2f4a4312112ab57043ce88f10edc4acc141ec (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.c4246
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:
- */