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-rw-r--r--src/plugins/nat/nat.c2842
1 files changed, 2842 insertions, 0 deletions
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c
new file mode 100644
index 00000000000..ac39be956a8
--- /dev/null
+++ b/src/plugins/nat/nat.c
@@ -0,0 +1,2842 @@
+/*
+ * 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_ipfix_logging.h>
+#include <nat/nat_det.h>
+#include <nat/nat64.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/fib/ip4_fib.h>
+
+#include <vpp/app/version.h>
+
+snat_main_t snat_main;
+
+
+/* Hook up input features */
+VNET_FEATURE_INIT (ip4_snat_in2out, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "nat44-in2out",
+ .runs_before = VNET_FEATURES ("nat44-out2in"),
+};
+VNET_FEATURE_INIT (ip4_snat_out2in, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "nat44-out2in",
+ .runs_before = VNET_FEATURES ("ip4-lookup"),
+};
+VNET_FEATURE_INIT (ip4_snat_det_in2out, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "nat44-det-in2out",
+ .runs_before = VNET_FEATURES ("nat44-det-out2in"),
+};
+VNET_FEATURE_INIT (ip4_snat_det_out2in, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "nat44-det-out2in",
+ .runs_before = VNET_FEATURES ("ip4-lookup"),
+};
+VNET_FEATURE_INIT (ip4_snat_in2out_worker_handoff, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "nat44-in2out-worker-handoff",
+ .runs_before = VNET_FEATURES ("nat44-out2in-worker-handoff"),
+};
+VNET_FEATURE_INIT (ip4_snat_out2in_worker_handoff, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "nat44-out2in-worker-handoff",
+ .runs_before = VNET_FEATURES ("ip4-lookup"),
+};
+VNET_FEATURE_INIT (ip4_snat_in2out_fast, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "nat44-in2out-fast",
+ .runs_before = VNET_FEATURES ("nat44-out2in-fast"),
+};
+VNET_FEATURE_INIT (ip4_snat_out2in_fast, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "nat44-out2in-fast",
+ .runs_before = VNET_FEATURES ("ip4-lookup"),
+};
+VNET_FEATURE_INIT (ip4_snat_hairpin_dst, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "nat44-hairpin-dst",
+ .runs_before = VNET_FEATURES ("ip4-lookup"),
+};
+
+/* Hook up output features */
+VNET_FEATURE_INIT (ip4_snat_in2out_output, static) = {
+ .arc_name = "ip4-output",
+ .node_name = "nat44-in2out-output",
+ .runs_before = VNET_FEATURES ("interface-output"),
+};
+VNET_FEATURE_INIT (ip4_snat_in2out_output_worker_handoff, static) = {
+ .arc_name = "ip4-output",
+ .node_name = "nat44-in2out-output-worker-handoff",
+ .runs_before = VNET_FEATURES ("interface-output"),
+};
+VNET_FEATURE_INIT (ip4_snat_hairpin_src, static) = {
+ .arc_name = "ip4-output",
+ .node_name = "nat44-hairpin-src",
+ .runs_before = VNET_FEATURES ("interface-output"),
+};
+
+
+/* *INDENT-OFF* */
+VLIB_PLUGIN_REGISTER () = {
+ .version = VPP_BUILD_VER,
+ .description = "Network Address Translation",
+};
+/* *INDENT-ON* */
+
+/**
+ * @brief Add/del NAT address to FIB.
+ *
+ * Add the external NAT address to the FIB as receive entries. This ensures
+ * that VPP will reply to ARP for this address and we don't need to enable
+ * proxy ARP on the outside interface.
+ *
+ * @param addr IPv4 address.
+ * @param plen address prefix length
+ * @param sw_if_index Interface.
+ * @param is_add If 0 delete, otherwise add.
+ */
+void
+snat_add_del_addr_to_fib (ip4_address_t * addr, u8 p_len, u32 sw_if_index,
+ int is_add)
+{
+ 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,
+ FIB_SOURCE_PLUGIN_HI,
+ (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,
+ FIB_SOURCE_PLUGIN_HI);
+}
+
+void snat_add_address (snat_main_t *sm, ip4_address_t *addr, u32 vrf_id)
+{
+ snat_address_t * ap;
+ snat_interface_t *i;
+
+ if (vrf_id != ~0)
+ sm->vrf_mode = 1;
+
+ /* Check if address already exists */
+ vec_foreach (ap, sm->addresses)
+ {
+ if (ap->addr.as_u32 == addr->as_u32)
+ return;
+ }
+
+ 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);
+ else
+ ap->fib_index = ~0;
+#define _(N, i, n, s) \
+ clib_bitmap_alloc (ap->busy_##n##_port_bitmap, 65535);
+ foreach_snat_protocol
+#undef _
+
+ /* Add external address to FIB */
+ pool_foreach (i, sm->interfaces,
+ ({
+ if (i->is_inside)
+ continue;
+
+ snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
+ break;
+ }));
+ pool_foreach (i, sm->output_feature_interfaces,
+ ({
+ if (i->is_inside)
+ continue;
+
+ snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
+ break;
+ }));
+}
+
+static int is_snat_address_used_in_static_mapping (snat_main_t *sm,
+ ip4_address_t addr)
+{
+ snat_static_mapping_t *m;
+ pool_foreach (m, sm->static_mappings,
+ ({
+ if (m->external_addr.as_u32 == addr.as_u32)
+ return 1;
+ }));
+
+ return 0;
+}
+
+void increment_v4_address (ip4_address_t * a)
+{
+ u32 v;
+
+ v = clib_net_to_host_u32(a->as_u32) + 1;
+ a->as_u32 = clib_host_to_net_u32(v);
+}
+
+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,
+ snat_protocol_t proto,
+ int addr_only,
+ int is_add)
+{
+ 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->is_add = is_add;
+}
+
+/**
+ * @brief Add static mapping.
+ *
+ * Create static mapping between local addr+port and external addr+port.
+ *
+ * @param l_addr Local IPv4 address.
+ * @param e_addr External IPv4 address.
+ * @param l_port Local port number.
+ * @param e_port External port number.
+ * @param vrf_id VRF ID.
+ * @param addr_only If 0 address port and pair mapping, otherwise address only.
+ * @param sw_if_index External port instead of specific IP address.
+ * @param is_add If 0 delete static mapping, otherwise add.
+ *
+ * @returns
+ */
+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, snat_protocol_t proto, int is_add)
+{
+ snat_main_t * sm = &snat_main;
+ snat_static_mapping_t *m;
+ snat_session_key_t m_key;
+ clib_bihash_kv_8_8_t kv, value;
+ snat_address_t *a = 0;
+ u32 fib_index = ~0;
+ uword * p;
+ snat_interface_t *interface;
+ int i;
+
+ /* If the external address is a specific interface address */
+ if (sw_if_index != ~0)
+ {
+ ip4_address_t * first_int_addr;
+
+ /* Might be already set... */
+ first_int_addr = ip4_interface_first_address
+ (sm->ip4_main, sw_if_index, 0 /* just want the address*/);
+
+ /* DHCP resolution required? */
+ if (first_int_addr == 0)
+ {
+ snat_add_static_mapping_when_resolved
+ (sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto,
+ addr_only, is_add);
+ return 0;
+ }
+ else
+ e_addr.as_u32 = first_int_addr->as_u32;
+ }
+
+ m_key.addr = e_addr;
+ m_key.port = addr_only ? 0 : e_port;
+ m_key.protocol = addr_only ? 0 : proto;
+ m_key.fib_index = sm->outside_fib_index;
+ kv.key = m_key.as_u64;
+ 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;
+
+ /* Convert VRF id to FIB index */
+ if (vrf_id != ~0)
+ {
+ p = hash_get (sm->ip4_main->fib_index_by_table_id, vrf_id);
+ if (!p)
+ return VNET_API_ERROR_NO_SUCH_FIB;
+ fib_index = p[0];
+ }
+ /* 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;
+ }
+
+ /* 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))
+ {
+ 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 SNAT_PROTOCOL_##N: \
+ if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
+ return VNET_API_ERROR_INVALID_VALUE; \
+ clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 1); \
+ if (e_port > 1024) \
+ a->busy_##n##_ports++; \
+ break;
+ foreach_snat_protocol
+#undef _
+ default:
+ clib_warning("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);
+ memset (m, 0, sizeof (*m));
+ m->local_addr = l_addr;
+ m->external_addr = e_addr;
+ m->addr_only = addr_only;
+ 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;
+ }
+
+ m_key.addr = m->local_addr;
+ m_key.port = m->local_port;
+ m_key.protocol = m->proto;
+ m_key.fib_index = m->fib_index;
+ kv.key = m_key.as_u64;
+ kv.value = m - sm->static_mappings;
+ clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 1);
+
+ m_key.addr = m->external_addr;
+ m_key.port = m->external_port;
+ m_key.fib_index = sm->outside_fib_index;
+ kv.key = m_key.as_u64;
+ kv.value = m - sm->static_mappings;
+ clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 1);
+
+ /* Assign worker */
+ if (sm->workers)
+ {
+ snat_user_key_t w_key0;
+ snat_worker_key_t w_key1;
+
+ w_key0.addr = m->local_addr;
+ w_key0.fib_index = m->fib_index;
+ kv.key = w_key0.as_u64;
+
+ if (clib_bihash_search_8_8 (&sm->worker_by_in, &kv, &value))
+ {
+ kv.value = sm->first_worker_index +
+ sm->workers[sm->next_worker++ % vec_len (sm->workers)];
+
+ clib_bihash_add_del_8_8 (&sm->worker_by_in, &kv, 1);
+ }
+ else
+ {
+ kv.value = value.value;
+ }
+
+ w_key1.addr = m->external_addr;
+ w_key1.port = clib_host_to_net_u16 (m->external_port);
+ w_key1.fib_index = sm->outside_fib_index;
+ kv.key = w_key1.as_u64;
+ clib_bihash_add_del_8_8 (&sm->worker_by_out, &kv, 1);
+ }
+ }
+ else
+ {
+ if (!m)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+ /* Free external address port */
+ if (!addr_only && !(sm->static_mapping_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 SNAT_PROTOCOL_##N: \
+ clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
+ if (e_port > 1024) \
+ a->busy_##n##_ports--; \
+ break;
+ foreach_snat_protocol
+#undef _
+ default:
+ clib_warning("unknown_protocol");
+ return VNET_API_ERROR_INVALID_VALUE_2;
+ }
+ break;
+ }
+ }
+ }
+
+ m_key.addr = m->local_addr;
+ m_key.port = m->local_port;
+ m_key.protocol = m->proto;
+ m_key.fib_index = m->fib_index;
+ kv.key = m_key.as_u64;
+ clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 0);
+
+ m_key.addr = m->external_addr;
+ m_key.port = m->external_port;
+ m_key.fib_index = sm->outside_fib_index;
+ kv.key = m_key.as_u64;
+ clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 0);
+
+ /* Delete session(s) for static mapping if exist */
+ if (!(sm->static_mapping_only) ||
+ (sm->static_mapping_only && sm->static_mapping_connection_tracking))
+ {
+ snat_user_key_t u_key;
+ snat_user_t *u;
+ dlist_elt_t * head, * elt;
+ u32 elt_index, head_index, del_elt_index;
+ u32 ses_index;
+ u64 user_index;
+ snat_session_t * s;
+ snat_main_per_thread_data_t *tsm;
+
+ 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 (&sm->user_hash, &kv, &value))
+ {
+ user_index = value.value;
+ if (!clib_bihash_search_8_8 (&sm->worker_by_in, &kv, &value))
+ tsm = vec_elt_at_index (sm->per_thread_data, value.value);
+ else
+ tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
+ u = pool_elt_at_index (tsm->users, user_index);
+ if (u->nstaticsessions)
+ {
+ 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);
+ del_elt_index = elt_index;
+ elt_index = elt->next;
+ elt = pool_elt_at_index (tsm->list_pool, elt_index);
+ ses_index = elt->value;
+
+ if (!addr_only)
+ {
+ if ((s->out2in.addr.as_u32 != e_addr.as_u32) &&
+ (clib_net_to_host_u16 (s->out2in.port) != e_port))
+ continue;
+ }
+
+ if (snat_is_unk_proto_session (s))
+ {
+ clib_bihash_kv_16_8_t up_kv;
+ snat_unk_proto_ses_key_t up_key;
+ up_key.l_addr = s->in2out.addr;
+ up_key.r_addr = s->ext_host_addr;
+ up_key.fib_index = s->in2out.fib_index;
+ up_key.proto = s->in2out.port;
+ up_key.rsvd[0] = up_key.rsvd[1] = up_key.rsvd[2] = 0;
+ up_kv.key[0] = up_key.as_u64[0];
+ up_kv.key[1] = up_key.as_u64[1];
+ if (clib_bihash_add_del_16_8 (&sm->in2out_unk_proto,
+ &up_kv, 0))
+ clib_warning ("in2out key del failed");
+
+ up_key.l_addr = s->out2in.addr;
+ up_key.fib_index = s->out2in.fib_index;
+ up_kv.key[0] = up_key.as_u64[0];
+ up_kv.key[1] = up_key.as_u64[1];
+ if (clib_bihash_add_del_16_8 (&sm->out2in_unk_proto,
+ &up_kv, 0))
+ clib_warning ("out2in key del failed");
+
+ goto delete;
+ }
+ /* log NAT event */
+ snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port,
+ s->in2out.fib_index);
+
+ value.key = s->in2out.as_u64;
+ if (clib_bihash_add_del_8_8 (&sm->in2out, &value, 0))
+ clib_warning ("in2out key del failed");
+ value.key = s->out2in.as_u64;
+ if (clib_bihash_add_del_8_8 (&sm->out2in, &value, 0))
+ clib_warning ("out2in key del failed");
+delete:
+ pool_put (tsm->sessions, s);
+
+ clib_dlist_remove (tsm->list_pool, del_elt_index);
+ pool_put_index (tsm->list_pool, del_elt_index);
+ u->nstaticsessions--;
+
+ if (!addr_only)
+ break;
+ }
+ if (addr_only)
+ {
+ pool_put (tsm->users, u);
+ clib_bihash_add_del_8_8 (&sm->user_hash, &kv, 0);
+ }
+ }
+ }
+ }
+
+ /* Delete static mapping from pool */
+ pool_put (sm->static_mappings, m);
+ }
+
+ if (!addr_only)
+ return 0;
+
+ /* Add/delete external address to FIB */
+ pool_foreach (interface, sm->interfaces,
+ ({
+ if (interface->is_inside)
+ 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 (interface->is_inside)
+ continue;
+
+ snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add);
+ break;
+ }));
+
+ return 0;
+}
+
+int snat_del_address (snat_main_t *sm, ip4_address_t addr, u8 delete_sm)
+{
+ snat_address_t *a = 0;
+ snat_session_t *ses;
+ u32 *ses_to_be_removed = 0, *ses_index;
+ clib_bihash_kv_8_8_t kv, value;
+ snat_user_key_t user_key;
+ snat_user_t *u;
+ snat_main_per_thread_data_t *tsm;
+ snat_static_mapping_t *m;
+ snat_interface_t *interface;
+ int i;
+
+ /* Find SNAT address */
+ for (i=0; i < vec_len (sm->addresses); i++)
+ {
+ if (sm->addresses[i].addr.as_u32 == addr.as_u32)
+ {
+ a = sm->addresses + i;
+ break;
+ }
+ }
+ if (!a)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+ if (delete_sm)
+ {
+ 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, m->addr_only, ~0,
+ m->proto, 0);
+ }));
+ }
+ else
+ {
+ /* Check if address is used in some static mapping */
+ if (is_snat_address_used_in_static_mapping(sm, addr))
+ {
+ clib_warning ("address used in static mapping");
+ return VNET_API_ERROR_UNSPECIFIED;
+ }
+ }
+
+ if (a->fib_index != ~0)
+ fib_table_unlock(a->fib_index, FIB_PROTOCOL_IP4);
+
+ /* Delete sessions using address */
+ if (a->busy_tcp_ports || a->busy_udp_ports || a->busy_icmp_ports)
+ {
+ vec_foreach (tsm, sm->per_thread_data)
+ {
+ pool_foreach (ses, tsm->sessions, ({
+ if (ses->out2in.addr.as_u32 == addr.as_u32)
+ {
+ if (snat_is_unk_proto_session (ses))
+ {
+ clib_bihash_kv_16_8_t up_kv;
+ snat_unk_proto_ses_key_t up_key;
+ up_key.l_addr = ses->in2out.addr;
+ up_key.r_addr = ses->ext_host_addr;
+ up_key.fib_index = ses->in2out.fib_index;
+ up_key.proto = ses->in2out.port;
+ up_key.rsvd[0] = up_key.rsvd[1] = up_key.rsvd[2] = 0;
+ up_kv.key[0] = up_key.as_u64[0];
+ up_kv.key[1] = up_key.as_u64[1];
+ if (clib_bihash_add_del_16_8 (&sm->in2out_unk_proto,
+ &up_kv, 0))
+ clib_warning ("in2out key del failed");
+
+ up_key.l_addr = ses->out2in.addr;
+ up_key.fib_index = ses->out2in.fib_index;
+ up_kv.key[0] = up_key.as_u64[0];
+ up_kv.key[1] = up_key.as_u64[1];
+ if (clib_bihash_add_del_16_8 (&sm->out2in_unk_proto,
+ &up_kv, 0))
+ clib_warning ("out2in key del failed");
+ }
+ else
+ {
+ /* log NAT event */
+ snat_ipfix_logging_nat44_ses_delete(ses->in2out.addr.as_u32,
+ ses->out2in.addr.as_u32,
+ ses->in2out.protocol,
+ ses->in2out.port,
+ ses->out2in.port,
+ ses->in2out.fib_index);
+ kv.key = ses->in2out.as_u64;
+ clib_bihash_add_del_8_8 (&sm->in2out, &kv, 0);
+ kv.key = ses->out2in.as_u64;
+ clib_bihash_add_del_8_8 (&sm->out2in, &kv, 0);
+ }
+ vec_add1 (ses_to_be_removed, ses - tsm->sessions);
+ clib_dlist_remove (tsm->list_pool, ses->per_user_index);
+ user_key.addr = ses->in2out.addr;
+ user_key.fib_index = ses->in2out.fib_index;
+ kv.key = user_key.as_u64;
+ if (!clib_bihash_search_8_8 (&sm->user_hash, &kv, &value))
+ {
+ u = pool_elt_at_index (tsm->users, value.value);
+ u->nsessions--;
+ }
+ }
+ }));
+
+ vec_foreach (ses_index, ses_to_be_removed)
+ pool_put_index (tsm->sessions, ses_index[0]);
+
+ vec_free (ses_to_be_removed);
+ }
+ }
+
+ vec_del1 (sm->addresses, i);
+
+ /* Delete external address from FIB */
+ pool_foreach (interface, sm->interfaces,
+ ({
+ if (interface->is_inside)
+ continue;
+
+ snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
+ break;
+ }));
+ pool_foreach (interface, sm->output_feature_interfaces,
+ ({
+ if (interface->is_inside)
+ continue;
+
+ snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
+ break;
+ }));
+
+ return 0;
+}
+
+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;
+ snat_address_t * ap;
+ snat_static_mapping_t * m;
+ snat_det_map_t * dm;
+
+ 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 && !sm->deterministic)
+ feature_name = is_inside ? "nat44-in2out-worker-handoff" : "nat44-out2in-worker-handoff";
+ else if (sm->deterministic)
+ feature_name = is_inside ? "nat44-det-in2out" : "nat44-det-out2in";
+ else
+ feature_name = is_inside ? "nat44-in2out" : "nat44-out2in";
+ }
+
+ vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index,
+ !is_del, 0, 0);
+
+ if (sm->fq_in2out_index == ~0 && !sm->deterministic && sm->num_workers > 1)
+ sm->fq_in2out_index = vlib_frame_queue_main_init (sm->in2out_node_index, 0);
+
+ if (sm->fq_out2in_index == ~0 && !sm->deterministic && sm->num_workers > 1)
+ sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index, 0);
+
+ pool_foreach (i, sm->interfaces,
+ ({
+ if (i->sw_if_index == sw_if_index)
+ {
+ if (is_del)
+ pool_put (sm->interfaces, i);
+ else
+ return VNET_API_ERROR_VALUE_EXIST;
+
+ goto fib;
+ }
+ }));
+
+ if (is_del)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+ pool_get (sm->interfaces, i);
+ i->sw_if_index = sw_if_index;
+ i->is_inside = is_inside;
+
+ /* Add/delete external addresses to FIB */
+fib:
+ if (is_inside)
+ return 0;
+
+ 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 (!(m->addr_only))
+ continue;
+
+ snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
+ }));
+
+ pool_foreach (dm, sm->det_maps,
+ ({
+ snat_add_del_addr_to_fib(&dm->out_addr, dm->out_plen, sw_if_index, !is_del);
+ }));
+
+ 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;
+
+ if (sm->deterministic ||
+ (sm->static_mapping_only && !(sm->static_mapping_connection_tracking)))
+ return VNET_API_ERROR_UNSUPPORTED;
+
+ if (is_inside)
+ {
+ 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)
+ {
+ 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
+ {
+ 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);
+
+ 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;
+ }
+ }));
+
+ if (is_del)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+ pool_get (sm->output_feature_interfaces, i);
+ i->sw_if_index = sw_if_index;
+ i->is_inside = is_inside;
+
+ /* Add/delete external addresses to FIB */
+fib:
+ if (is_inside)
+ return 0;
+
+ 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 (!(m->addr_only))
+ continue;
+
+ snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
+ }));
+
+ 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);
+ clib_bitmap_foreach (i, bitmap,
+ ({
+ vec_add1(sm->workers, i);
+ sm->per_thread_data[i].snat_thread_index = j;
+ j++;
+ }));
+
+ sm->port_per_thread = (0xffff - 1024) / _vec_len (sm->workers);
+ sm->num_snat_thread = _vec_len (sm->workers);
+
+ return 0;
+}
+
+
+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 clib_error_t * snat_init (vlib_main_t * vm)
+{
+ snat_main_t * sm = &snat_main;
+ clib_error_t * error = 0;
+ ip4_main_t * im = &ip4_main;
+ ip_lookup_main_t * lm = &im->lookup_main;
+ uword *p;
+ vlib_thread_registration_t *tr;
+ vlib_thread_main_t *tm = vlib_get_thread_main ();
+ uword *bitmap = 0;
+ u32 i;
+ ip4_add_del_interface_address_callback_t cb4;
+
+ sm->vlib_main = vm;
+ sm->vnet_main = vnet_get_main();
+ sm->ip4_main = im;
+ sm->ip4_lookup_main = lm;
+ sm->api_main = &api_main;
+ sm->first_worker_index = 0;
+ sm->next_worker = 0;
+ sm->num_workers = 0;
+ sm->num_snat_thread = 1;
+ sm->workers = 0;
+ sm->port_per_thread = 0xffff - 1024;
+ sm->fq_in2out_index = ~0;
+ sm->fq_out2in_index = ~0;
+ sm->udp_timeout = SNAT_UDP_TIMEOUT;
+ sm->tcp_established_timeout = SNAT_TCP_ESTABLISHED_TIMEOUT;
+ sm->tcp_transitory_timeout = SNAT_TCP_TRANSITORY_TIMEOUT;
+ sm->icmp_timeout = SNAT_ICMP_TIMEOUT;
+
+ 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;
+ }
+ }
+
+ vec_validate (sm->per_thread_data, tm->n_vlib_mains - 1);
+
+ /* 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;
+ }
+
+ error = snat_api_init(vm, sm);
+ if (error)
+ return error;
+
+ /* Set up the interface address add/del callback */
+ cb4.function = snat_ip4_add_del_interface_address_cb;
+ cb4.function_opaque = 0;
+
+ vec_add1 (im->add_del_interface_address_callbacks, cb4);
+
+ /* Init IPFIX logging */
+ snat_ipfix_logging_init(vm);
+
+ error = nat64_init(vm);
+
+ return error;
+}
+
+VLIB_INIT_FUNCTION (snat_init);
+
+void snat_free_outside_address_and_port (snat_main_t * sm,
+ snat_session_key_t * k,
+ u32 address_index)
+{
+ snat_address_t *a;
+ u16 port_host_byte_order = clib_net_to_host_u16 (k->port);
+
+ ASSERT (address_index < vec_len (sm->addresses));
+
+ a = sm->addresses + address_index;
+
+ switch (k->protocol)
+ {
+#define _(N, i, n, s) \
+ case SNAT_PROTOCOL_##N: \
+ ASSERT (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
+ port_host_byte_order) == 1); \
+ clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
+ port_host_byte_order, 0); \
+ a->busy_##n##_ports--; \
+ break;
+ foreach_snat_protocol
+#undef _
+ default:
+ clib_warning("unknown_protocol");
+ return;
+ }
+}
+
+/**
+ * @brief Match NAT44 static mapping.
+ *
+ * @param sm NAT main.
+ * @param match Address and port to match.
+ * @param mapping External or local address and port of the matched mapping.
+ * @param by_external If 0 match by local address otherwise match by external
+ * address.
+ * @param is_addr_only If matched mapping is address only
+ *
+ * @returns 0 if match found otherwise 1.
+ */
+int snat_static_mapping_match (snat_main_t * sm,
+ snat_session_key_t match,
+ snat_session_key_t * mapping,
+ u8 by_external,
+ u8 *is_addr_only)
+{
+ clib_bihash_kv_8_8_t kv, value;
+ snat_static_mapping_t *m;
+ snat_session_key_t m_key;
+ clib_bihash_8_8_t *mapping_hash = &sm->static_mapping_by_local;
+
+ if (by_external)
+ mapping_hash = &sm->static_mapping_by_external;
+
+ m_key.addr = match.addr;
+ m_key.port = clib_net_to_host_u16 (match.port);
+ m_key.protocol = match.protocol;
+ m_key.fib_index = match.fib_index;
+
+ kv.key = m_key.as_u64;
+
+ if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
+ {
+ /* Try address only mapping */
+ m_key.port = 0;
+ m_key.protocol = 0;
+ kv.key = m_key.as_u64;
+ 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)
+ {
+ mapping->addr = m->local_addr;
+ /* Address only mapping doesn't change port */
+ mapping->port = m->addr_only ? match.port
+ : clib_host_to_net_u16 (m->local_port);
+ mapping->fib_index = m->fib_index;
+ }
+ else
+ {
+ mapping->addr = m->external_addr;
+ /* Address only mapping doesn't change port */
+ mapping->port = m->addr_only ? match.port
+ : clib_host_to_net_u16 (m->external_port);
+ mapping->fib_index = sm->outside_fib_index;
+ }
+
+ if (PREDICT_FALSE(is_addr_only != 0))
+ *is_addr_only = m->addr_only;
+
+ return 0;
+}
+
+static_always_inline u16
+snat_random_port (snat_main_t * sm, u16 min, u16 max)
+{
+ return min + random_u32 (&sm->random_seed) /
+ (random_u32_max() / (max - min + 1) + 1);
+}
+
+int snat_alloc_outside_address_and_port (snat_main_t * sm,
+ u32 fib_index,
+ u32 thread_index,
+ snat_session_key_t * k,
+ u32 * address_indexp)
+{
+ int i;
+ snat_address_t *a;
+ u32 portnum;
+
+ for (i = 0; i < vec_len (sm->addresses); i++)
+ {
+ a = sm->addresses + i;
+ if (sm->vrf_mode && a->fib_index != ~0 && a->fib_index != fib_index)
+ continue;
+ switch (k->protocol)
+ {
+#define _(N, j, n, s) \
+ case SNAT_PROTOCOL_##N: \
+ if (a->busy_##n##_ports < (sm->port_per_thread * sm->num_snat_thread)) \
+ { \
+ while (1) \
+ { \
+ portnum = (sm->port_per_thread * \
+ sm->per_thread_data[thread_index].snat_thread_index) + \
+ snat_random_port(sm, 0, sm->port_per_thread) + 1024; \
+ if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, portnum)) \
+ continue; \
+ clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, portnum, 1); \
+ a->busy_##n##_ports++; \
+ k->addr = a->addr; \
+ k->port = clib_host_to_net_u16(portnum); \
+ *address_indexp = i; \
+ return 0; \
+ } \
+ } \
+ break;
+ foreach_snat_protocol
+#undef _
+ default:
+ clib_warning("unknown protocol");
+ return 1;
+ }
+
+ }
+ /* Totally out of translations to use... */
+ snat_ipfix_logging_addresses_exhausted(0);
+ return 1;
+}
+
+
+static clib_error_t *
+add_address_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ snat_main_t * sm = &snat_main;
+ ip4_address_t start_addr, end_addr, this_addr;
+ u32 start_host_order, end_host_order;
+ u32 vrf_id = ~0;
+ int i, count;
+ int is_add = 1;
+ int rv = 0;
+ clib_error_t *error = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "%U - %U",
+ unformat_ip4_address, &start_addr,
+ unformat_ip4_address, &end_addr))
+ ;
+ else if (unformat (line_input, "tenant-vrf %u", &vrf_id))
+ ;
+ else if (unformat (line_input, "%U", unformat_ip4_address, &start_addr))
+ end_addr = start_addr;
+ else if (unformat (line_input, "del"))
+ is_add = 0;
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ if (sm->static_mapping_only)
+ {
+ error = clib_error_return (0, "static mapping only mode");
+ goto done;
+ }
+
+ start_host_order = clib_host_to_net_u32 (start_addr.as_u32);
+ end_host_order = clib_host_to_net_u32 (end_addr.as_u32);
+
+ if (end_host_order < start_host_order)
+ {
+ error = clib_error_return (0, "end address less than start address");
+ goto done;
+ }
+
+ count = (end_host_order - start_host_order) + 1;
+
+ if (count > 1024)
+ clib_warning ("%U - %U, %d addresses...",
+ format_ip4_address, &start_addr,
+ format_ip4_address, &end_addr,
+ count);
+
+ this_addr = start_addr;
+
+ for (i = 0; i < count; i++)
+ {
+ if (is_add)
+ snat_add_address (sm, &this_addr, vrf_id);
+ else
+ rv = snat_del_address (sm, this_addr, 0);
+
+ switch (rv)
+ {
+ case VNET_API_ERROR_NO_SUCH_ENTRY:
+ error = clib_error_return (0, "S-NAT address not exist.");
+ goto done;
+ case VNET_API_ERROR_UNSPECIFIED:
+ error = clib_error_return (0, "S-NAT address used in static mapping.");
+ goto done;
+ default:
+ break;
+ }
+
+ increment_v4_address (&this_addr);
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+VLIB_CLI_COMMAND (add_address_command, static) = {
+ .path = "nat44 add address",
+ .short_help = "nat44 add addresses <ip4-range-start> [- <ip4-range-end>] "
+ "[tenant-vrf <vrf-id>] [del]",
+ .function = add_address_command_fn,
+};
+
+static clib_error_t *
+snat_feature_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ vnet_main_t * vnm = vnet_get_main();
+ clib_error_t * error = 0;
+ u32 sw_if_index;
+ u32 * inside_sw_if_indices = 0;
+ u32 * outside_sw_if_indices = 0;
+ u8 is_output_feature = 0;
+ int is_del = 0;
+ int i;
+
+ sw_if_index = ~0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "in %U", unformat_vnet_sw_interface,
+ vnm, &sw_if_index))
+ vec_add1 (inside_sw_if_indices, sw_if_index);
+ else if (unformat (line_input, "out %U", unformat_vnet_sw_interface,
+ vnm, &sw_if_index))
+ vec_add1 (outside_sw_if_indices, sw_if_index);
+ else if (unformat (line_input, "output-feature"))
+ is_output_feature = 1;
+ else if (unformat (line_input, "del"))
+ is_del = 1;
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ if (vec_len (inside_sw_if_indices))
+ {
+ for (i = 0; i < vec_len(inside_sw_if_indices); i++)
+ {
+ sw_if_index = inside_sw_if_indices[i];
+ if (is_output_feature)
+ {
+ if (snat_interface_add_del_output_feature (sw_if_index, 1, is_del))
+ {
+ error = clib_error_return (0, "%s %U failed",
+ is_del ? "del" : "add",
+ format_vnet_sw_interface_name, vnm,
+ vnet_get_sw_interface (vnm,
+ sw_if_index));
+ goto done;
+ }
+ }
+ else
+ {
+ if (snat_interface_add_del (sw_if_index, 1, is_del))
+ {
+ error = clib_error_return (0, "%s %U failed",
+ is_del ? "del" : "add",
+ format_vnet_sw_interface_name, vnm,
+ vnet_get_sw_interface (vnm,
+ sw_if_index));
+ goto done;
+ }
+ }
+ }
+ }
+
+ if (vec_len (outside_sw_if_indices))
+ {
+ for (i = 0; i < vec_len(outside_sw_if_indices); i++)
+ {
+ sw_if_index = outside_sw_if_indices[i];
+ if (is_output_feature)
+ {
+ if (snat_interface_add_del_output_feature (sw_if_index, 0, is_del))
+ {
+ error = clib_error_return (0, "%s %U failed",
+ is_del ? "del" : "add",
+ format_vnet_sw_interface_name, vnm,
+ vnet_get_sw_interface (vnm,
+ sw_if_index));
+ goto done;
+ }
+ }
+ else
+ {
+ if (snat_interface_add_del (sw_if_index, 0, is_del))
+ {
+ error = clib_error_return (0, "%s %U failed",
+ is_del ? "del" : "add",
+ format_vnet_sw_interface_name, vnm,
+ vnet_get_sw_interface (vnm,
+ sw_if_index));
+ goto done;
+ }
+ }
+ }
+ }
+
+done:
+ unformat_free (line_input);
+ vec_free (inside_sw_if_indices);
+ vec_free (outside_sw_if_indices);
+
+ return error;
+}
+
+VLIB_CLI_COMMAND (set_interface_snat_command, static) = {
+ .path = "set interface nat44",
+ .function = snat_feature_command_fn,
+ .short_help = "set interface nat44 in <intfc> out <intfc> [output-feature] "
+ "[del]",
+};
+
+uword
+unformat_snat_protocol (unformat_input_t * input, va_list * args)
+{
+ u32 *r = va_arg (*args, u32 *);
+
+ if (0);
+#define _(N, i, n, s) else if (unformat (input, s)) *r = SNAT_PROTOCOL_##N;
+ foreach_snat_protocol
+#undef _
+ else
+ return 0;
+ return 1;
+}
+
+u8 *
+format_snat_protocol (u8 * s, va_list * args)
+{
+ u32 i = va_arg (*args, u32);
+ u8 *t = 0;
+
+ switch (i)
+ {
+#define _(N, j, n, str) case SNAT_PROTOCOL_##N: t = (u8 *) str; break;
+ foreach_snat_protocol
+#undef _
+ default:
+ s = format (s, "unknown");
+ return s;
+ }
+ s = format (s, "%s", t);
+ return s;
+}
+
+static clib_error_t *
+add_static_mapping_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ clib_error_t * error = 0;
+ ip4_address_t l_addr, e_addr;
+ u32 l_port = 0, e_port = 0, vrf_id = ~0;
+ int is_add = 1;
+ int addr_only = 1;
+ u32 sw_if_index = ~0;
+ vnet_main_t * vnm = vnet_get_main();
+ int rv;
+ snat_protocol_t proto;
+ u8 proto_set = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "local %U %u", unformat_ip4_address, &l_addr,
+ &l_port))
+ addr_only = 0;
+ else if (unformat (line_input, "local %U", unformat_ip4_address, &l_addr))
+ ;
+ else if (unformat (line_input, "external %U %u", unformat_ip4_address,
+ &e_addr, &e_port))
+ addr_only = 0;
+ else if (unformat (line_input, "external %U", unformat_ip4_address,
+ &e_addr))
+ ;
+ else if (unformat (line_input, "external %U %u",
+ unformat_vnet_sw_interface, vnm, &sw_if_index,
+ &e_port))
+ addr_only = 0;
+
+ else if (unformat (line_input, "external %U",
+ unformat_vnet_sw_interface, vnm, &sw_if_index))
+ ;
+ else if (unformat (line_input, "vrf %u", &vrf_id))
+ ;
+ else if (unformat (line_input, "%U", unformat_snat_protocol, &proto))
+ proto_set = 1;
+ else if (unformat (line_input, "del"))
+ is_add = 0;
+ else
+ {
+ error = clib_error_return (0, "unknown input: '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ if (!addr_only && !proto_set)
+ {
+ error = clib_error_return (0, "missing protocol");
+ goto done;
+ }
+
+ rv = snat_add_static_mapping(l_addr, e_addr, (u16) l_port, (u16) e_port,
+ vrf_id, addr_only, sw_if_index, proto, is_add);
+
+ switch (rv)
+ {
+ case VNET_API_ERROR_INVALID_VALUE:
+ error = clib_error_return (0, "External port already in use.");
+ goto done;
+ case VNET_API_ERROR_NO_SUCH_ENTRY:
+ if (is_add)
+ error = clib_error_return (0, "External addres must be allocated.");
+ else
+ error = clib_error_return (0, "Mapping not exist.");
+ goto done;
+ case VNET_API_ERROR_NO_SUCH_FIB:
+ error = clib_error_return (0, "No such VRF id.");
+ goto done;
+ case VNET_API_ERROR_VALUE_EXIST:
+ error = clib_error_return (0, "Mapping already exist.");
+ goto done;
+ default:
+ break;
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * @cliexpar
+ * @cliexstart{snat add static mapping}
+ * Static mapping allows hosts on the external network to initiate connection
+ * to to the local network host.
+ * To create static mapping between local host address 10.0.0.3 port 6303 and
+ * external address 4.4.4.4 port 3606 for TCP protocol use:
+ * vpp# nat44 add static mapping local tcp 10.0.0.3 6303 external 4.4.4.4 3606
+ * If not runnig "static mapping only" NAT plugin mode use before:
+ * vpp# nat44 add address 4.4.4.4
+ * To create static mapping between local and external address use:
+ * vpp# nat44 add static mapping local 10.0.0.3 external 4.4.4.4
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (add_static_mapping_command, static) = {
+ .path = "nat44 add static mapping",
+ .function = add_static_mapping_command_fn,
+ .short_help =
+ "nat44 add static mapping local tcp|udp|icmp <addr> [<port>] external <addr> [<port>] [vrf <table-id>] [del]",
+};
+
+static clib_error_t *
+set_workers_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ uword *bitmap = 0;
+ int rv = 0;
+ clib_error_t *error = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "%U", unformat_bitmap_list, &bitmap))
+ ;
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ if (bitmap == 0)
+ {
+ error = clib_error_return (0, "List of workers must be specified.");
+ goto done;
+ }
+
+ rv = snat_set_workers(bitmap);
+
+ clib_bitmap_free (bitmap);
+
+ switch (rv)
+ {
+ case VNET_API_ERROR_INVALID_WORKER:
+ error = clib_error_return (0, "Invalid worker(s).");
+ goto done;
+ case VNET_API_ERROR_FEATURE_DISABLED:
+ error = clib_error_return (0,
+ "Supported only if 2 or more workes available.");
+ goto done;
+ default:
+ break;
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * @cliexpar
+ * @cliexstart{set snat workers}
+ * Set NAT workers if 2 or more workers available, use:
+ * vpp# set snat workers 0-2,5
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (set_workers_command, static) = {
+ .path = "set nat workers",
+ .function = set_workers_command_fn,
+ .short_help =
+ "set nat workers <workers-list>",
+};
+
+static clib_error_t *
+snat_ipfix_logging_enable_disable_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ u32 domain_id = 0;
+ u32 src_port = 0;
+ u8 enable = 1;
+ int rv = 0;
+ clib_error_t *error = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "domain %d", &domain_id))
+ ;
+ else if (unformat (line_input, "src-port %d", &src_port))
+ ;
+ else if (unformat (line_input, "disable"))
+ enable = 0;
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ rv = snat_ipfix_logging_enable_disable (enable, domain_id, (u16) src_port);
+
+ if (rv)
+ {
+ error = clib_error_return (0, "ipfix logging enable failed");
+ goto done;
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * @cliexpar
+ * @cliexstart{snat ipfix logging}
+ * To enable NAT IPFIX logging use:
+ * vpp# nat ipfix logging
+ * To set IPFIX exporter use:
+ * vpp# set ipfix exporter collector 10.10.10.3 src 10.10.10.1
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (snat_ipfix_logging_enable_disable_command, static) = {
+ .path = "nat ipfix logging",
+ .function = snat_ipfix_logging_enable_disable_command_fn,
+ .short_help = "nat ipfix logging [domain <domain-id>] [src-port <port>] [disable]",
+};
+
+static u32
+snat_get_worker_in2out_cb (ip4_header_t * ip0, u32 rx_fib_index0)
+{
+ snat_main_t *sm = &snat_main;
+ snat_user_key_t key0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ u32 next_worker_index = 0;
+
+ key0.addr = ip0->src_address;
+ key0.fib_index = rx_fib_index0;
+
+ kv0.key = key0.as_u64;
+
+ /* Ever heard of of the "user" before? */
+ if (clib_bihash_search_8_8 (&sm->worker_by_in, &kv0, &value0))
+ {
+ /* No, assign next available worker (RR) */
+ next_worker_index = sm->first_worker_index;
+ if (vec_len (sm->workers))
+ {
+ next_worker_index +=
+ sm->workers[sm->next_worker++ % _vec_len (sm->workers)];
+ }
+
+ /* add non-traslated packets worker lookup */
+ kv0.value = next_worker_index;
+ clib_bihash_add_del_8_8 (&sm->worker_by_in, &kv0, 1);
+ }
+ else
+ next_worker_index = value0.value;
+
+ return next_worker_index;
+}
+
+static u32
+snat_get_worker_out2in_cb (ip4_header_t * ip0, u32 rx_fib_index0)
+{
+ snat_main_t *sm = &snat_main;
+ snat_worker_key_t key0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ udp_header_t * udp0;
+ u32 next_worker_index = 0;
+
+ udp0 = ip4_next_header (ip0);
+
+ key0.addr = ip0->dst_address;
+ key0.port = udp0->dst_port;
+ key0.fib_index = rx_fib_index0;
+
+ if (PREDICT_FALSE(ip0->protocol == IP_PROTOCOL_ICMP))
+ {
+ icmp46_header_t * icmp0 = (icmp46_header_t *) udp0;
+ icmp_echo_header_t *echo0 = (icmp_echo_header_t *)(icmp0+1);
+ key0.port = echo0->identifier;
+ }
+
+ kv0.key = key0.as_u64;
+
+ /* Ever heard of of the "user" before? */
+ if (clib_bihash_search_8_8 (&sm->worker_by_out, &kv0, &value0))
+ {
+ key0.port = 0;
+ kv0.key = key0.as_u64;
+
+ if (clib_bihash_search_8_8 (&sm->worker_by_out, &kv0, &value0))
+ {
+ /* No, assign next available worker (RR) */
+ next_worker_index = sm->first_worker_index;
+ if (vec_len (sm->workers))
+ {
+ next_worker_index +=
+ sm->workers[sm->next_worker++ % _vec_len (sm->workers)];
+ }
+ }
+ else
+ {
+ /* Static mapping without port */
+ next_worker_index = value0.value;
+ }
+
+ /* Add to translated packets worker lookup */
+ kv0.value = next_worker_index;
+ clib_bihash_add_del_8_8 (&sm->worker_by_out, &kv0, 1);
+ }
+ else
+ next_worker_index = value0.value;
+
+ return next_worker_index;
+}
+
+static clib_error_t *
+snat_config (vlib_main_t * vm, unformat_input_t * input)
+{
+ snat_main_t * sm = &snat_main;
+ u32 translation_buckets = 1024;
+ u32 translation_memory_size = 128<<20;
+ u32 user_buckets = 128;
+ u32 user_memory_size = 64<<20;
+ u32 max_translations_per_user = 100;
+ u32 outside_vrf_id = 0;
+ u32 inside_vrf_id = 0;
+ u32 static_mapping_buckets = 1024;
+ u32 static_mapping_memory_size = 64<<20;
+ u8 static_mapping_only = 0;
+ u8 static_mapping_connection_tracking = 0;
+
+ sm->deterministic = 0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "translation hash buckets %d", &translation_buckets))
+ ;
+ else if (unformat (input, "translation hash memory %d",
+ &translation_memory_size));
+ else if (unformat (input, "user hash buckets %d", &user_buckets))
+ ;
+ else if (unformat (input, "user hash memory %d",
+ &user_memory_size))
+ ;
+ else if (unformat (input, "max translations per user %d",
+ &max_translations_per_user))
+ ;
+ else if (unformat (input, "outside VRF id %d",
+ &outside_vrf_id))
+ ;
+ else if (unformat (input, "inside VRF id %d",
+ &inside_vrf_id))
+ ;
+ else if (unformat (input, "static mapping only"))
+ {
+ static_mapping_only = 1;
+ if (unformat (input, "connection tracking"))
+ static_mapping_connection_tracking = 1;
+ }
+ else if (unformat (input, "deterministic"))
+ sm->deterministic = 1;
+ else
+ return clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, input);
+ }
+
+ /* for show commands, etc. */
+ sm->translation_buckets = translation_buckets;
+ sm->translation_memory_size = translation_memory_size;
+ sm->user_buckets = user_buckets;
+ sm->user_memory_size = user_memory_size;
+ sm->max_translations_per_user = max_translations_per_user;
+ sm->outside_vrf_id = outside_vrf_id;
+ sm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
+ outside_vrf_id);
+ sm->inside_vrf_id = inside_vrf_id;
+ sm->inside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
+ inside_vrf_id);
+ sm->static_mapping_only = static_mapping_only;
+ sm->static_mapping_connection_tracking = static_mapping_connection_tracking;
+
+ if (sm->deterministic)
+ {
+ sm->in2out_node_index = snat_det_in2out_node.index;
+ sm->in2out_output_node_index = ~0;
+ sm->out2in_node_index = snat_det_out2in_node.index;
+ sm->icmp_match_in2out_cb = icmp_match_in2out_det;
+ sm->icmp_match_out2in_cb = icmp_match_out2in_det;
+ }
+ else
+ {
+ sm->worker_in2out_cb = snat_get_worker_in2out_cb;
+ sm->worker_out2in_cb = snat_get_worker_out2in_cb;
+ sm->in2out_node_index = snat_in2out_node.index;
+ sm->in2out_output_node_index = snat_in2out_output_node.index;
+ sm->out2in_node_index = snat_out2in_node.index;
+ if (!static_mapping_only ||
+ (static_mapping_only && static_mapping_connection_tracking))
+ {
+ sm->icmp_match_in2out_cb = icmp_match_in2out_slow;
+ sm->icmp_match_out2in_cb = icmp_match_out2in_slow;
+
+ clib_bihash_init_8_8 (&sm->worker_by_in, "worker-by-in", user_buckets,
+ user_memory_size);
+
+ clib_bihash_init_8_8 (&sm->worker_by_out, "worker-by-out", user_buckets,
+ user_memory_size);
+
+ clib_bihash_init_8_8 (&sm->in2out, "in2out", translation_buckets,
+ translation_memory_size);
+
+ clib_bihash_init_8_8 (&sm->out2in, "out2in", translation_buckets,
+ translation_memory_size);
+
+ clib_bihash_init_8_8 (&sm->user_hash, "users", user_buckets,
+ user_memory_size);
+
+ clib_bihash_init_16_8 (&sm->in2out_unk_proto, "in2out-unk-proto",
+ translation_buckets, translation_memory_size);
+
+ clib_bihash_init_16_8 (&sm->out2in_unk_proto, "out2in-unk-proto",
+ translation_buckets, translation_memory_size);
+ }
+ else
+ {
+ sm->icmp_match_in2out_cb = icmp_match_in2out_fast;
+ sm->icmp_match_out2in_cb = icmp_match_out2in_fast;
+ }
+ clib_bihash_init_8_8 (&sm->static_mapping_by_local,
+ "static_mapping_by_local", static_mapping_buckets,
+ static_mapping_memory_size);
+
+ clib_bihash_init_8_8 (&sm->static_mapping_by_external,
+ "static_mapping_by_external", static_mapping_buckets,
+ static_mapping_memory_size);
+ }
+
+ return 0;
+}
+
+VLIB_CONFIG_FUNCTION (snat_config, "nat");
+
+u8 * format_snat_session_state (u8 * s, va_list * args)
+{
+ u32 i = va_arg (*args, u32);
+ u8 *t = 0;
+
+ switch (i)
+ {
+#define _(v, N, str) case SNAT_SESSION_##N: t = (u8 *) str; break;
+ foreach_snat_session_state
+#undef _
+ default:
+ t = format (t, "unknown");
+ }
+ s = format (s, "%s", t);
+ return s;
+}
+
+u8 * format_snat_key (u8 * s, va_list * args)
+{
+ snat_session_key_t * key = va_arg (*args, snat_session_key_t *);
+ char * protocol_string = "unknown";
+ static char *protocol_strings[] = {
+ "UDP",
+ "TCP",
+ "ICMP",
+ };
+
+ if (key->protocol < ARRAY_LEN(protocol_strings))
+ protocol_string = protocol_strings[key->protocol];
+
+ s = format (s, "%U proto %s port %d fib %d",
+ format_ip4_address, &key->addr, protocol_string,
+ clib_net_to_host_u16 (key->port), key->fib_index);
+ return s;
+}
+
+u8 * format_snat_session (u8 * s, va_list * args)
+{
+ snat_main_t * sm __attribute__((unused)) = va_arg (*args, snat_main_t *);
+ snat_session_t * sess = va_arg (*args, snat_session_t *);
+
+ if (snat_is_unk_proto_session (sess))
+ {
+ s = format (s, " i2o %U proto %u fib %u\n",
+ format_ip4_address, &sess->in2out.addr, sess->in2out.port,
+ sess->in2out.fib_index);
+ s = format (s, " o2i %U proto %u fib %u\n",
+ format_ip4_address, &sess->out2in.addr, sess->out2in.port,
+ sess->out2in.fib_index);
+ }
+ else
+ {
+ s = format (s, " i2o %U\n", format_snat_key, &sess->in2out);
+ s = format (s, " o2i %U\n", format_snat_key, &sess->out2in);
+ }
+ s = format (s, " last heard %.2f\n", sess->last_heard);
+ s = format (s, " total pkts %d, total bytes %lld\n",
+ sess->total_pkts, sess->total_bytes);
+ if (snat_is_session_static (sess))
+ s = format (s, " static translation\n");
+ else
+ s = format (s, " dynamic translation\n");
+
+ return s;
+}
+
+u8 * format_snat_user (u8 * s, va_list * args)
+{
+ snat_main_per_thread_data_t * sm = va_arg (*args, snat_main_per_thread_data_t *);
+ snat_user_t * u = va_arg (*args, snat_user_t *);
+ int verbose = va_arg (*args, int);
+ dlist_elt_t * head, * elt;
+ u32 elt_index, head_index;
+ u32 session_index;
+ snat_session_t * sess;
+
+ s = format (s, "%U: %d dynamic translations, %d static translations\n",
+ format_ip4_address, &u->addr, u->nsessions, u->nstaticsessions);
+
+ if (verbose == 0)
+ return s;
+
+ if (u->nsessions || u->nstaticsessions)
+ {
+ head_index = u->sessions_per_user_list_head_index;
+ head = pool_elt_at_index (sm->list_pool, head_index);
+
+ elt_index = head->next;
+ elt = pool_elt_at_index (sm->list_pool, elt_index);
+ session_index = elt->value;
+
+ while (session_index != ~0)
+ {
+ sess = pool_elt_at_index (sm->sessions, session_index);
+
+ s = format (s, " %U\n", format_snat_session, sm, sess);
+
+ elt_index = elt->next;
+ elt = pool_elt_at_index (sm->list_pool, elt_index);
+ session_index = elt->value;
+ }
+ }
+
+ return s;
+}
+
+u8 * format_snat_static_mapping (u8 * s, va_list * args)
+{
+ snat_static_mapping_t *m = va_arg (*args, snat_static_mapping_t *);
+
+ if (m->addr_only)
+ s = format (s, "local %U external %U vrf %d",
+ format_ip4_address, &m->local_addr,
+ format_ip4_address, &m->external_addr,
+ m->vrf_id);
+ else
+ s = format (s, "%U local %U:%d external %U:%d vrf %d",
+ format_snat_protocol, m->proto,
+ format_ip4_address, &m->local_addr, m->local_port,
+ format_ip4_address, &m->external_addr, m->external_port,
+ m->vrf_id);
+
+ return s;
+}
+
+u8 * format_snat_static_map_to_resolve (u8 * s, va_list * args)
+{
+ snat_static_map_resolve_t *m = va_arg (*args, snat_static_map_resolve_t *);
+ vnet_main_t *vnm = vnet_get_main();
+
+ if (m->addr_only)
+ s = format (s, "local %U external %U vrf %d",
+ format_ip4_address, &m->l_addr,
+ format_vnet_sw_interface_name, vnm,
+ vnet_get_sw_interface (vnm, m->sw_if_index),
+ m->vrf_id);
+ else
+ s = format (s, "%U local %U:%d external %U:%d vrf %d",
+ format_snat_protocol, m->proto,
+ format_ip4_address, &m->l_addr, m->l_port,
+ format_vnet_sw_interface_name, vnm,
+ vnet_get_sw_interface (vnm, m->sw_if_index), m->e_port,
+ m->vrf_id);
+
+ return s;
+}
+
+u8 * format_det_map_ses (u8 * s, va_list * args)
+{
+ snat_det_map_t * det_map = va_arg (*args, snat_det_map_t *);
+ ip4_address_t in_addr, out_addr;
+ u32 in_offset, out_offset;
+ snat_det_session_t * ses = va_arg (*args, snat_det_session_t *);
+ u32 * i = va_arg (*args, u32 *);
+
+ u32 user_index = *i / SNAT_DET_SES_PER_USER;
+ in_addr.as_u32 = clib_host_to_net_u32 (
+ clib_net_to_host_u32(det_map->in_addr.as_u32) + user_index);
+ in_offset = clib_net_to_host_u32(in_addr.as_u32) -
+ clib_net_to_host_u32(det_map->in_addr.as_u32);
+ out_offset = in_offset / det_map->sharing_ratio;
+ out_addr.as_u32 = clib_host_to_net_u32(
+ clib_net_to_host_u32(det_map->out_addr.as_u32) + out_offset);
+ s = format (s, "in %U:%d out %U:%d external host %U:%d state: %U expire: %d\n",
+ format_ip4_address, &in_addr,
+ clib_net_to_host_u16 (ses->in_port),
+ format_ip4_address, &out_addr,
+ clib_net_to_host_u16 (ses->out.out_port),
+ format_ip4_address, &ses->out.ext_host_addr,
+ clib_net_to_host_u16 (ses->out.ext_host_port),
+ format_snat_session_state, ses->state,
+ ses->expire);
+
+ return s;
+}
+
+static clib_error_t *
+show_snat_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ int verbose = 0;
+ snat_main_t * sm = &snat_main;
+ snat_user_t * u;
+ snat_static_mapping_t *m;
+ snat_interface_t *i;
+ snat_address_t * ap;
+ vnet_main_t *vnm = vnet_get_main();
+ snat_main_per_thread_data_t *tsm;
+ u32 users_num = 0, sessions_num = 0, *worker, *sw_if_index;
+ uword j = 0;
+ snat_static_map_resolve_t *rp;
+ snat_det_map_t * dm;
+ snat_det_session_t * ses;
+
+ if (unformat (input, "detail"))
+ verbose = 1;
+ else if (unformat (input, "verbose"))
+ verbose = 2;
+
+ if (sm->static_mapping_only)
+ {
+ if (sm->static_mapping_connection_tracking)
+ vlib_cli_output (vm, "NAT plugin mode: static mapping only connection "
+ "tracking");
+ else
+ vlib_cli_output (vm, "NAT plugin mode: static mapping only");
+ }
+ else if (sm->deterministic)
+ {
+ vlib_cli_output (vm, "NAT plugin mode: deterministic mapping");
+ }
+ else
+ {
+ vlib_cli_output (vm, "NAT plugin mode: dynamic translations enabled");
+ }
+
+ if (verbose > 0)
+ {
+ pool_foreach (i, sm->interfaces,
+ ({
+ vlib_cli_output (vm, "%U %s", format_vnet_sw_interface_name, vnm,
+ vnet_get_sw_interface (vnm, i->sw_if_index),
+ i->is_inside ? "in" : "out");
+ }));
+
+ pool_foreach (i, sm->output_feature_interfaces,
+ ({
+ vlib_cli_output (vm, "%U output-feature %s",
+ format_vnet_sw_interface_name, vnm,
+ vnet_get_sw_interface (vnm, i->sw_if_index),
+ i->is_inside ? "in" : "out");
+ }));
+
+ if (vec_len (sm->auto_add_sw_if_indices))
+ {
+ vlib_cli_output (vm, "NAT44 pool addresses interfaces:");
+ vec_foreach (sw_if_index, sm->auto_add_sw_if_indices)
+ {
+ vlib_cli_output (vm, "%U", format_vnet_sw_interface_name, vnm,
+ vnet_get_sw_interface (vnm, *sw_if_index));
+ }
+ }
+
+ vec_foreach (ap, sm->addresses)
+ {
+ vlib_cli_output (vm, "%U", format_ip4_address, &ap->addr);
+ if (ap->fib_index != ~0)
+ vlib_cli_output (vm, " tenant VRF: %u",
+ ip4_fib_get(ap->fib_index)->table_id);
+ else
+ vlib_cli_output (vm, " tenant VRF independent");
+#define _(N, i, n, s) \
+ vlib_cli_output (vm, " %d busy %s ports", ap->busy_##n##_ports, s);
+ foreach_snat_protocol
+#undef _
+ }
+ }
+
+ if (sm->num_workers > 1)
+ {
+ vlib_cli_output (vm, "%d workers", vec_len (sm->workers));
+ if (verbose > 0)
+ {
+ vec_foreach (worker, sm->workers)
+ {
+ vlib_worker_thread_t *w =
+ vlib_worker_threads + *worker + sm->first_worker_index;
+ vlib_cli_output (vm, " %s", w->name);
+ }
+ }
+ }
+
+ if (sm->deterministic)
+ {
+ vlib_cli_output (vm, "udp timeout: %dsec", sm->udp_timeout);
+ vlib_cli_output (vm, "tcp-established timeout: %dsec",
+ sm->tcp_established_timeout);
+ vlib_cli_output (vm, "tcp-transitory timeout: %dsec",
+ sm->tcp_transitory_timeout);
+ vlib_cli_output (vm, "icmp timeout: %dsec", sm->icmp_timeout);
+ vlib_cli_output (vm, "%d deterministic mappings",
+ pool_elts (sm->det_maps));
+ if (verbose > 0)
+ {
+ pool_foreach (dm, sm->det_maps,
+ ({
+ vlib_cli_output (vm, "in %U/%d out %U/%d\n",
+ format_ip4_address, &dm->in_addr, dm->in_plen,
+ format_ip4_address, &dm->out_addr, dm->out_plen);
+ vlib_cli_output (vm, " outside address sharing ratio: %d\n",
+ dm->sharing_ratio);
+ vlib_cli_output (vm, " number of ports per inside host: %d\n",
+ dm->ports_per_host);
+ vlib_cli_output (vm, " sessions number: %d\n", dm->ses_num);
+ if (verbose > 1)
+ {
+ vec_foreach_index (j, dm->sessions)
+ {
+ ses = vec_elt_at_index (dm->sessions, j);
+ if (ses->in_port)
+ vlib_cli_output (vm, " %U", format_det_map_ses, dm, ses,
+ &j);
+ }
+ }
+ }));
+ }
+ }
+ else
+ {
+ if (sm->static_mapping_only && !(sm->static_mapping_connection_tracking))
+ {
+ vlib_cli_output (vm, "%d static mappings",
+ pool_elts (sm->static_mappings));
+
+ if (verbose > 0)
+ {
+ pool_foreach (m, sm->static_mappings,
+ ({
+ vlib_cli_output (vm, "%U", format_snat_static_mapping, m);
+ }));
+ }
+ }
+ else
+ {
+ vec_foreach (tsm, sm->per_thread_data)
+ {
+ users_num += pool_elts (tsm->users);
+ sessions_num += pool_elts (tsm->sessions);
+ }
+
+ vlib_cli_output (vm, "%d users, %d outside addresses, %d active sessions,"
+ " %d static mappings",
+ users_num,
+ vec_len (sm->addresses),
+ sessions_num,
+ pool_elts (sm->static_mappings));
+
+ if (verbose > 0)
+ {
+ vlib_cli_output (vm, "%U", format_bihash_8_8, &sm->in2out,
+ verbose - 1);
+ vlib_cli_output (vm, "%U", format_bihash_8_8, &sm->out2in,
+ verbose - 1);
+ vlib_cli_output (vm, "%U", format_bihash_8_8, &sm->worker_by_in,
+ verbose - 1);
+ vlib_cli_output (vm, "%U", format_bihash_8_8, &sm->worker_by_out,
+ verbose - 1);
+ vec_foreach_index (j, sm->per_thread_data)
+ {
+ tsm = vec_elt_at_index (sm->per_thread_data, j);
+
+ if (pool_elts (tsm->users) == 0)
+ continue;
+
+ vlib_worker_thread_t *w = vlib_worker_threads + j;
+ vlib_cli_output (vm, "Thread %d (%s at lcore %u):", j, w->name,
+ w->lcore_id);
+ vlib_cli_output (vm, " %d list pool elements",
+ pool_elts (tsm->list_pool));
+
+ pool_foreach (u, tsm->users,
+ ({
+ vlib_cli_output (vm, " %U", format_snat_user, tsm, u,
+ verbose - 1);
+ }));
+ }
+
+ if (pool_elts (sm->static_mappings))
+ {
+ vlib_cli_output (vm, "static mappings:");
+ pool_foreach (m, sm->static_mappings,
+ ({
+ vlib_cli_output (vm, "%U", format_snat_static_mapping, m);
+ }));
+ for (j = 0; j < vec_len (sm->to_resolve); j++)
+ {
+ rp = sm->to_resolve + j;
+ vlib_cli_output (vm, "%U",
+ format_snat_static_map_to_resolve, rp);
+ }
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+VLIB_CLI_COMMAND (show_snat_command, static) = {
+ .path = "show nat44",
+ .short_help = "show nat44",
+ .function = show_snat_command_fn,
+};
+
+
+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;
+ u32 *indices_to_delete = 0;
+ int i, j;
+ int rv;
+
+ for (i = 0; i < vec_len(sm->auto_add_sw_if_indices); i++)
+ {
+ if (sw_if_index == sm->auto_add_sw_if_indices[i])
+ {
+ if (!is_delete)
+ {
+ /* Don't trip over lease renewal, static config */
+ for (j = 0; j < vec_len(sm->addresses); j++)
+ if (sm->addresses[j].addr.as_u32 == address->as_u32)
+ return;
+
+ snat_add_address (sm, address, ~0);
+ /* Scan static map resolution vector */
+ for (j = 0; j < vec_len (sm->to_resolve); j++)
+ {
+ rp = sm->to_resolve + j;
+ /* On this interface? */
+ if (rp->sw_if_index == sw_if_index)
+ {
+ /* Add the static mapping */
+ rv = snat_add_static_mapping (rp->l_addr,
+ address[0],
+ rp->l_port,
+ rp->e_port,
+ rp->vrf_id,
+ rp->addr_only,
+ ~0 /* sw_if_index */,
+ rp->proto,
+ rp->is_add);
+ if (rv)
+ clib_warning ("snat_add_static_mapping returned %d",
+ rv);
+ vec_add1 (indices_to_delete, j);
+ }
+ }
+ /* If we resolved any of the outstanding static mappings */
+ if (vec_len(indices_to_delete))
+ {
+ /* Delete them */
+ for (j = vec_len(indices_to_delete)-1; j >= 0; j--)
+ vec_delete(sm->to_resolve, 1, j);
+ vec_free(indices_to_delete);
+ }
+ return;
+ }
+ else
+ {
+ (void) snat_del_address(sm, address[0], 1);
+ return;
+ }
+ }
+ }
+}
+
+
+int snat_add_interface_address (snat_main_t *sm, u32 sw_if_index, int is_del)
+{
+ 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;
+
+ first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index,
+ 0 /* just want the address*/);
+
+ for (i = 0; i < vec_len(sm->auto_add_sw_if_indices); i++)
+ {
+ if (sm->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);
+ 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);
+ }
+ }
+ 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 */
+ 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)
+ snat_add_address (sm, first_int_addr, ~0);
+
+ return 0;
+}
+
+static clib_error_t *
+snat_add_interface_address_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ snat_main_t *sm = &snat_main;
+ unformat_input_t _line_input, *line_input = &_line_input;
+ u32 sw_if_index;
+ int rv;
+ int is_del = 0;
+ clib_error_t *error = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "%U", unformat_vnet_sw_interface,
+ sm->vnet_main, &sw_if_index))
+ ;
+ else if (unformat (line_input, "del"))
+ is_del = 1;
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ rv = snat_add_interface_address (sm, sw_if_index, is_del);
+
+ switch (rv)
+ {
+ case 0:
+ break;
+
+ default:
+ error = clib_error_return (0, "snat_add_interface_address returned %d",
+ rv);
+ goto done;
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+VLIB_CLI_COMMAND (snat_add_interface_address_command, static) = {
+ .path = "nat44 add interface address",
+ .short_help = "nat44 add interface address <interface> [del]",
+ .function = snat_add_interface_address_command_fn,
+};
+
+static clib_error_t *
+snat_det_map_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ snat_main_t *sm = &snat_main;
+ unformat_input_t _line_input, *line_input = &_line_input;
+ ip4_address_t in_addr, out_addr;
+ u32 in_plen, out_plen;
+ int is_add = 1, rv;
+ clib_error_t *error = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "in %U/%u", unformat_ip4_address, &in_addr, &in_plen))
+ ;
+ else if (unformat (line_input, "out %U/%u", unformat_ip4_address, &out_addr, &out_plen))
+ ;
+ else if (unformat (line_input, "del"))
+ is_add = 0;
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ unformat_free (line_input);
+
+ rv = snat_det_add_map(sm, &in_addr, (u8) in_plen, &out_addr, (u8)out_plen,
+ is_add);
+
+ if (rv)
+ {
+ error = clib_error_return (0, "snat_det_add_map return %d", rv);
+ goto done;
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * @cliexpar
+ * @cliexstart{snat deterministic add}
+ * Create bijective mapping of inside address to outside address and port range
+ * pairs, with the purpose of enabling deterministic NAT to reduce logging in
+ * CGN deployments.
+ * To create deterministic mapping between inside network 10.0.0.0/18 and
+ * outside network 1.1.1.0/30 use:
+ * # vpp# nat44 deterministic add in 10.0.0.0/18 out 1.1.1.0/30
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (snat_det_map_command, static) = {
+ .path = "nat44 deterministic add",
+ .short_help = "nat44 deterministic add in <addr>/<plen> out <addr>/<plen> [del]",
+ .function = snat_det_map_command_fn,
+};
+
+static clib_error_t *
+snat_det_forward_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ snat_main_t *sm = &snat_main;
+ unformat_input_t _line_input, *line_input = &_line_input;
+ ip4_address_t in_addr, out_addr;
+ u16 lo_port;
+ snat_det_map_t * dm;
+ clib_error_t *error = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "%U", unformat_ip4_address, &in_addr))
+ ;
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ unformat_free (line_input);
+
+ dm = snat_det_map_by_user(sm, &in_addr);
+ if (!dm)
+ vlib_cli_output (vm, "no match");
+ else
+ {
+ snat_det_forward (dm, &in_addr, &out_addr, &lo_port);
+ vlib_cli_output (vm, "%U:<%d-%d>", format_ip4_address, &out_addr,
+ lo_port, lo_port + dm->ports_per_host - 1);
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * @cliexpar
+ * @cliexstart{snat deterministic forward}
+ * Return outside address and port range from inside address for deterministic
+ * NAT.
+ * To obtain outside address and port of inside host use:
+ * vpp# nat44 deterministic forward 10.0.0.2
+ * 1.1.1.0:<1054-1068>
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (snat_det_forward_command, static) = {
+ .path = "nat44 deterministic forward",
+ .short_help = "nat44 deterministic forward <addr>",
+ .function = snat_det_forward_command_fn,
+};
+
+static clib_error_t *
+snat_det_reverse_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ snat_main_t *sm = &snat_main;
+ unformat_input_t _line_input, *line_input = &_line_input;
+ ip4_address_t in_addr, out_addr;
+ u32 out_port;
+ snat_det_map_t * dm;
+ clib_error_t *error = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "%U:%d", unformat_ip4_address, &out_addr, &out_port))
+ ;
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ }
+ }
+
+ unformat_free (line_input);
+
+ if (out_port < 1024 || out_port > 65535)
+ {
+ error = clib_error_return (0, "wrong port, must be <1024-65535>");
+ goto done;
+ }
+
+ dm = snat_det_map_by_out(sm, &out_addr);
+ if (!dm)
+ vlib_cli_output (vm, "no match");
+ else
+ {
+ snat_det_reverse (dm, &out_addr, (u16) out_port, &in_addr);
+ vlib_cli_output (vm, "%U", format_ip4_address, &in_addr);
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * @cliexpar
+ * @cliexstart{snat deterministic reverse}
+ * Return inside address from outside address and port for deterministic NAT.
+ * To obtain inside host address from outside address and port use:
+ * #vpp nat44 deterministic reverse 1.1.1.1:1276
+ * 10.0.16.16
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (snat_det_reverse_command, static) = {
+ .path = "nat44 deterministic reverse",
+ .short_help = "nat44 deterministic reverse <addr>:<port>",
+ .function = snat_det_reverse_command_fn,
+};
+
+static clib_error_t *
+set_timeout_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ snat_main_t *sm = &snat_main;
+ unformat_input_t _line_input, *line_input = &_line_input;
+ clib_error_t *error = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "udp %u", &sm->udp_timeout))
+ ;
+ else if (unformat (line_input, "tcp-established %u",
+ &sm->tcp_established_timeout))
+ ;
+ else if (unformat (line_input, "tcp-transitory %u",
+ &sm->tcp_transitory_timeout))
+ ;
+ else if (unformat (line_input, "icmp %u", &sm->icmp_timeout))
+ ;
+ else if (unformat (line_input, "reset"))
+ {
+ sm->udp_timeout = SNAT_UDP_TIMEOUT;
+ sm->tcp_established_timeout = SNAT_TCP_ESTABLISHED_TIMEOUT;
+ sm->tcp_transitory_timeout = SNAT_TCP_TRANSITORY_TIMEOUT;
+ sm->icmp_timeout = SNAT_ICMP_TIMEOUT;
+ }
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ unformat_free (line_input);
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * @cliexpar
+ * @cliexstart{set snat deterministic timeout}
+ * Set values of timeouts for deterministic NAT (in seconds), use:
+ * vpp# set nat44 deterministic timeout udp 120 tcp-established 7500
+ * tcp-transitory 250 icmp 90
+ * To reset default values use:
+ * vpp# set nat44 deterministic timeout reset
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (set_timeout_command, static) = {
+ .path = "set nat44 deterministic timeout",
+ .function = set_timeout_command_fn,
+ .short_help =
+ "set nat44 deterministic timeout [udp <sec> | tcp-established <sec> "
+ "tcp-transitory <sec> | icmp <sec> | reset]",
+};
+
+static clib_error_t *
+snat_det_close_session_out_fn (vlib_main_t *vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ snat_main_t *sm = &snat_main;
+ unformat_input_t _line_input, *line_input = &_line_input;
+ ip4_address_t out_addr, ext_addr, in_addr;
+ u16 out_port, ext_port;
+ snat_det_map_t * dm;
+ snat_det_session_t * ses;
+ snat_det_out_key_t key;
+ clib_error_t *error = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "%U:%d %U:%d",
+ unformat_ip4_address, &out_addr, &out_port,
+ unformat_ip4_address, &ext_addr, &ext_port))
+ ;
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ unformat_free (line_input);
+
+ dm = snat_det_map_by_out(sm, &out_addr);
+ if (!dm)
+ vlib_cli_output (vm, "no match");
+ else
+ {
+ snat_det_reverse(dm, &ext_addr, out_port, &in_addr);
+ key.ext_host_addr = out_addr;
+ key.ext_host_port = ntohs(ext_port);
+ key.out_port = ntohs(out_port);
+ ses = snat_det_get_ses_by_out(dm, &out_addr, key.as_u64);
+ if (!ses)
+ vlib_cli_output (vm, "no match");
+ else
+ snat_det_ses_close(dm, ses);
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * @cliexpar
+ * @cliexstart{snat deterministic close session out}
+ * Close session using outside ip address and port
+ * and external ip address and port, use:
+ * vpp# nat44 deterministic close session out 1.1.1.1:1276 2.2.2.2:2387
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (snat_det_close_sesion_out_command, static) = {
+ .path = "nat44 deterministic close session out",
+ .short_help = "nat44 deterministic close session out "
+ "<out_addr>:<out_port> <ext_addr>:<ext_port>",
+ .function = snat_det_close_session_out_fn,
+};
+
+static clib_error_t *
+snat_det_close_session_in_fn (vlib_main_t *vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ snat_main_t *sm = &snat_main;
+ unformat_input_t _line_input, *line_input = &_line_input;
+ ip4_address_t in_addr, ext_addr;
+ u16 in_port, ext_port;
+ snat_det_map_t * dm;
+ snat_det_session_t * ses;
+ snat_det_out_key_t key;
+ clib_error_t *error = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "%U:%d %U:%d",
+ unformat_ip4_address, &in_addr, &in_port,
+ unformat_ip4_address, &ext_addr, &ext_port))
+ ;
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ unformat_free (line_input);
+
+ dm = snat_det_map_by_user (sm, &in_addr);
+ if (!dm)
+ vlib_cli_output (vm, "no match");
+ else
+ {
+ key.ext_host_addr = ext_addr;
+ key.ext_host_port = ntohs (ext_port);
+ ses = snat_det_find_ses_by_in (dm, &in_addr, ntohs(in_port), key);
+ if (!ses)
+ vlib_cli_output (vm, "no match");
+ else
+ snat_det_ses_close(dm, ses);
+ }
+
+done:
+ unformat_free(line_input);
+
+ return error;
+}
+
+/*?
+ * @cliexpar
+ * @cliexstart{snat deterministic close_session_in}
+ * Close session using inside ip address and port
+ * and external ip address and port, use:
+ * vpp# nat44 deterministic close session in 3.3.3.3:3487 2.2.2.2:2387
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (snat_det_close_session_in_command, static) = {
+ .path = "nat44 deterministic close session in",
+ .short_help = "nat44 deterministic close session in "
+ "<in_addr>:<in_port> <ext_addr>:<ext_port>",
+ .function = snat_det_close_session_in_fn,
+};