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-rw-r--r--src/plugins/snat/snat.c1957
1 files changed, 1957 insertions, 0 deletions
diff --git a/src/plugins/snat/snat.c b/src/plugins/snat/snat.c
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+++ b/src/plugins/snat/snat.c
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+/*
+ * 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/plugin/plugin.h>
+#include <vlibapi/api.h>
+#include <snat/snat.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vlibsocket/api.h>
+
+snat_main_t snat_main;
+
+/* define message IDs */
+#include <snat/snat_msg_enum.h>
+
+/* define message structures */
+#define vl_typedefs
+#include <snat/snat_all_api_h.h>
+#undef vl_typedefs
+
+/* define generated endian-swappers */
+#define vl_endianfun
+#include <snat/snat_all_api_h.h>
+#undef vl_endianfun
+
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+
+/* Get the API version number */
+#define vl_api_version(n,v) static u32 api_version=(v);
+#include <snat/snat_all_api_h.h>
+#undef vl_api_version
+
+/* Macro to finish up custom dump fns */
+#define FINISH \
+ vec_add1 (s, 0); \
+ vl_print (handle, (char *)s); \
+ vec_free (s); \
+ return handle;
+
+/*
+ * A handy macro to set up a message reply.
+ * Assumes that the following variables are available:
+ * mp - pointer to request message
+ * rmp - pointer to reply message type
+ * rv - return value
+ */
+
+#define REPLY_MACRO(t) \
+do { \
+ unix_shared_memory_queue_t * q = \
+ vl_api_client_index_to_input_queue (mp->client_index); \
+ if (!q) \
+ return; \
+ \
+ rmp = vl_msg_api_alloc (sizeof (*rmp)); \
+ rmp->_vl_msg_id = ntohs((t)+sm->msg_id_base); \
+ rmp->context = mp->context; \
+ rmp->retval = ntohl(rv); \
+ \
+ vl_msg_api_send_shmem (q, (u8 *)&rmp); \
+} while(0);
+
+#define REPLY_MACRO2(t, body) \
+do { \
+ unix_shared_memory_queue_t * q = \
+ vl_api_client_index_to_input_queue (mp->client_index); \
+ if (!q) \
+ return; \
+ \
+ rmp = vl_msg_api_alloc (sizeof (*rmp)); \
+ rmp->_vl_msg_id = ntohs((t)+sm->msg_id_base); \
+ rmp->context = mp->context; \
+ rmp->retval = ntohl(rv); \
+ do {body;} while (0); \
+ vl_msg_api_send_shmem (q, (u8 *)&rmp); \
+} while(0);
+
+
+/* Hook up input features */
+VNET_FEATURE_INIT (ip4_snat_in2out, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "snat-in2out",
+ .runs_before = VNET_FEATURES ("snat-out2in"),
+};
+VNET_FEATURE_INIT (ip4_snat_out2in, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "snat-out2in",
+ .runs_before = VNET_FEATURES ("ip4-lookup"),
+};
+VNET_FEATURE_INIT (ip4_snat_in2out_worker_handoff, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "snat-in2out-worker-handoff",
+ .runs_before = VNET_FEATURES ("snat-out2in-worker-handoff"),
+};
+VNET_FEATURE_INIT (ip4_snat_out2in_worker_handoff, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "snat-out2in-worker-handoff",
+ .runs_before = VNET_FEATURES ("ip4-lookup"),
+};
+VNET_FEATURE_INIT (ip4_snat_in2out_fast, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "snat-in2out-fast",
+ .runs_before = VNET_FEATURES ("snat-out2in-fast"),
+};
+VNET_FEATURE_INIT (ip4_snat_out2in_fast, static) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "snat-out2in-fast",
+ .runs_before = VNET_FEATURES ("ip4-lookup"),
+};
+
+
+/*
+ * This routine exists to convince the vlib plugin framework that
+ * we haven't accidentally copied a random .dll into the plugin directory.
+ *
+ * Also collects global variable pointers passed from the vpp engine
+ */
+
+clib_error_t *
+vlib_plugin_register (vlib_main_t * vm, vnet_plugin_handoff_t * h,
+ int from_early_init)
+{
+ snat_main_t * sm = &snat_main;
+ clib_error_t * error = 0;
+
+ sm->vlib_main = vm;
+ sm->vnet_main = h->vnet_main;
+ sm->ethernet_main = h->ethernet_main;
+
+ return error;
+}
+
+/*$$$$$ move to an installed header file */
+#if (1 || CLIB_DEBUG > 0) /* "trust, but verify" */
+
+#define VALIDATE_SW_IF_INDEX(mp) \
+ do { u32 __sw_if_index = ntohl(mp->sw_if_index); \
+ vnet_main_t *__vnm = vnet_get_main(); \
+ if (pool_is_free_index(__vnm->interface_main.sw_interfaces, \
+ __sw_if_index)) { \
+ rv = VNET_API_ERROR_INVALID_SW_IF_INDEX; \
+ goto bad_sw_if_index; \
+ } \
+} while(0);
+
+#define BAD_SW_IF_INDEX_LABEL \
+do { \
+bad_sw_if_index: \
+ ; \
+} while (0);
+
+#define VALIDATE_RX_SW_IF_INDEX(mp) \
+ do { u32 __rx_sw_if_index = ntohl(mp->rx_sw_if_index); \
+ vnet_main_t *__vnm = vnet_get_main(); \
+ if (pool_is_free_index(__vnm->interface_main.sw_interfaces, \
+ __rx_sw_if_index)) { \
+ rv = VNET_API_ERROR_INVALID_SW_IF_INDEX; \
+ goto bad_rx_sw_if_index; \
+ } \
+} while(0);
+
+#define BAD_RX_SW_IF_INDEX_LABEL \
+do { \
+bad_rx_sw_if_index: \
+ ; \
+} while (0);
+
+#define VALIDATE_TX_SW_IF_INDEX(mp) \
+ do { u32 __tx_sw_if_index = ntohl(mp->tx_sw_if_index); \
+ vnet_main_t *__vnm = vnet_get_main(); \
+ if (pool_is_free_index(__vnm->interface_main.sw_interfaces, \
+ __tx_sw_if_index)) { \
+ rv = VNET_API_ERROR_INVALID_SW_IF_INDEX; \
+ goto bad_tx_sw_if_index; \
+ } \
+} while(0);
+
+#define BAD_TX_SW_IF_INDEX_LABEL \
+do { \
+bad_tx_sw_if_index: \
+ ; \
+} while (0);
+
+#else
+
+#define VALIDATE_SW_IF_INDEX(mp)
+#define BAD_SW_IF_INDEX_LABEL
+#define VALIDATE_RX_SW_IF_INDEX(mp)
+#define BAD_RX_SW_IF_INDEX_LABEL
+#define VALIDATE_TX_SW_IF_INDEX(mp)
+#define BAD_TX_SW_IF_INDEX_LABEL
+
+#endif /* CLIB_DEBUG > 0 */
+
+void snat_add_address (snat_main_t *sm, ip4_address_t *addr)
+{
+ snat_address_t * ap;
+
+ /* 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;
+ clib_bitmap_alloc (ap->busy_port_bitmap, 65535);
+}
+
+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;
+}
+
+int snat_del_address (snat_main_t *sm, ip4_address_t addr)
+{
+ 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;
+
+ 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;
+
+ /* 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;
+ }
+
+ /* Delete sessions using address */
+ if (a->busy_ports)
+ {
+ vec_foreach (tsm, sm->per_thread_data)
+ {
+ pool_foreach (ses, tsm->sessions, ({
+ if (ses->out2in.addr.as_u32 == addr.as_u32)
+ {
+ vec_add1 (ses_to_be_removed, ses - tsm->sessions);
+ 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);
+ 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);
+
+ return 0;
+}
+
+static 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);
+}
+
+/**
+ * @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 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,
+ int is_add)
+{
+ snat_main_t * sm = &snat_main;
+ snat_static_mapping_t *m;
+ snat_static_mapping_key_t m_key;
+ clib_bihash_kv_8_8_t kv, value;
+ snat_address_t *a = 0;
+ u32 fib_index = ~0;
+ uword * p;
+ int i;
+
+ /* If outside FIB index is not resolved yet */
+ if (sm->outside_fib_index == ~0)
+ {
+ p = hash_get (sm->ip4_main->fib_index_by_table_id, sm->outside_vrf_id);
+ if (!p)
+ return VNET_API_ERROR_NO_SUCH_FIB;
+ sm->outside_fib_index = p[0];
+ }
+
+ m_key.addr = e_addr;
+ m_key.port = addr_only ? 0 : e_port;
+ 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
+ {
+ if (sm->inside_fib_index == ~0)
+ {
+ p = hash_get (sm->ip4_main->fib_index_by_table_id, sm->inside_vrf_id);
+ if (!p)
+ return VNET_API_ERROR_NO_SUCH_FIB;
+ fib_index = p[0];
+ sm->inside_fib_index = fib_index;
+ }
+ 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 */
+ if (clib_bitmap_get_no_check (a->busy_port_bitmap, e_port))
+ return VNET_API_ERROR_INVALID_VALUE;
+ clib_bitmap_set_no_check (a->busy_port_bitmap, e_port, 1);
+ if (e_port > 1024)
+ a->busy_ports++;
+
+ 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_key.addr = m->local_addr;
+ m_key.port = m->local_port;
+ 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_static_mapping_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;
+ clib_bitmap_set_no_check (a->busy_port_bitmap, e_port, 0);
+ a->busy_ports--;
+
+ break;
+ }
+ }
+ }
+
+ m_key.addr = m->local_addr;
+ m_key.port = m->local_port;
+ 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;
+ }
+
+ value.key = s->in2out.as_u64;
+ clib_bihash_add_del_8_8 (&sm->in2out, &value, 0);
+ value.key = s->out2in.as_u64;
+ clib_bihash_add_del_8_8 (&sm->out2in, &value, 0);
+ 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);
+ }
+
+ return 0;
+}
+
+static 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;
+
+ if (sm->static_mapping_only && !(sm->static_mapping_connection_tracking))
+ feature_name = is_inside ? "snat-in2out-fast" : "snat-out2in-fast";
+ else
+ {
+ if (sm->num_workers > 1)
+ feature_name = is_inside ? "snat-in2out-worker-handoff" : "snat-out2in-worker-handoff";
+ else
+ feature_name = is_inside ? "snat-in2out" : "snat-out2in";
+ }
+
+ vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index,
+ !is_del, 0, 0);
+
+ if (sm->fq_in2out_index == ~0)
+ sm->fq_in2out_index = vlib_frame_queue_main_init (snat_in2out_node.index, 0);
+
+ if (sm->fq_out2in_index == ~0)
+ sm->fq_out2in_index = vlib_frame_queue_main_init (snat_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;
+
+ return 0;
+ }
+ }));
+
+ 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;
+
+ return 0;
+}
+
+static int snat_set_workers (uword * bitmap)
+{
+ snat_main_t *sm = &snat_main;
+ int i;
+
+ 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);
+ }));
+
+ return 0;
+}
+
+static void
+vl_api_snat_add_address_range_t_handler
+(vl_api_snat_add_address_range_t * mp)
+{
+ snat_main_t * sm = &snat_main;
+ vl_api_snat_add_address_range_reply_t * rmp;
+ ip4_address_t this_addr;
+ u32 start_host_order, end_host_order;
+ int i, count;
+ int rv = 0;
+ u32 * tmp;
+
+ if (mp->is_ip4 != 1)
+ {
+ rv = VNET_API_ERROR_UNIMPLEMENTED;
+ goto send_reply;
+ }
+
+ if (sm->static_mapping_only)
+ {
+ rv = VNET_API_ERROR_FEATURE_DISABLED;
+ goto send_reply;
+ }
+
+ tmp = (u32 *) mp->first_ip_address;
+ start_host_order = clib_host_to_net_u32 (tmp[0]);
+ tmp = (u32 *) mp->last_ip_address;
+ end_host_order = clib_host_to_net_u32 (tmp[0]);
+
+ count = (end_host_order - start_host_order) + 1;
+
+ if (count > 1024)
+ clib_warning ("%U - %U, %d addresses...",
+ format_ip4_address, mp->first_ip_address,
+ format_ip4_address, mp->last_ip_address,
+ count);
+
+ memcpy (&this_addr.as_u8, mp->first_ip_address, 4);
+
+ for (i = 0; i < count; i++)
+ {
+ if (mp->is_add)
+ snat_add_address (sm, &this_addr);
+ else
+ rv = snat_del_address (sm, this_addr);
+
+ if (rv)
+ goto send_reply;
+
+ increment_v4_address (&this_addr);
+ }
+
+ send_reply:
+ REPLY_MACRO (VL_API_SNAT_ADD_ADDRESS_RANGE_REPLY);
+}
+
+static void *vl_api_snat_add_address_range_t_print
+(vl_api_snat_add_address_range_t *mp, void * handle)
+{
+ u8 * s;
+
+ s = format (0, "SCRIPT: snat_add_address_range ");
+ s = format (s, "%U ", format_ip4_address, mp->first_ip_address);
+ if (memcmp (mp->first_ip_address, mp->last_ip_address, 4))
+ {
+ s = format (s, " - %U ", format_ip4_address, mp->last_ip_address);
+ }
+ FINISH;
+}
+
+static void
+send_snat_address_details
+(snat_address_t * a, unix_shared_memory_queue_t * q, u32 context)
+{
+ vl_api_snat_address_details_t *rmp;
+ snat_main_t * sm = &snat_main;
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_SNAT_ADDRESS_DETAILS+sm->msg_id_base);
+ rmp->is_ip4 = 1;
+ clib_memcpy (rmp->ip_address, &(a->addr), 4);
+ rmp->context = context;
+
+ vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_snat_address_dump_t_handler
+(vl_api_snat_address_dump_t * mp)
+{
+ unix_shared_memory_queue_t *q;
+ snat_main_t * sm = &snat_main;
+ snat_address_t * a;
+
+ q = vl_api_client_index_to_input_queue (mp->client_index);
+ if (q == 0)
+ return;
+
+ vec_foreach (a, sm->addresses)
+ send_snat_address_details (a, q, mp->context);
+}
+
+static void *vl_api_snat_address_dump_t_print
+(vl_api_snat_address_dump_t *mp, void * handle)
+{
+ u8 *s;
+
+ s = format (0, "SCRIPT: snat_address_dump ");
+
+ FINISH;
+}
+
+static void
+vl_api_snat_interface_add_del_feature_t_handler
+(vl_api_snat_interface_add_del_feature_t * mp)
+{
+ snat_main_t * sm = &snat_main;
+ vl_api_snat_interface_add_del_feature_reply_t * rmp;
+ u8 is_del = mp->is_add == 0;
+ u32 sw_if_index = ntohl(mp->sw_if_index);
+ int rv = 0;
+
+ VALIDATE_SW_IF_INDEX(mp);
+
+ rv = snat_interface_add_del (sw_if_index, mp->is_inside, is_del);
+
+ BAD_SW_IF_INDEX_LABEL;
+
+ REPLY_MACRO(VL_API_SNAT_INTERFACE_ADD_DEL_FEATURE_REPLY);
+}
+
+static void *vl_api_snat_interface_add_del_feature_t_print
+(vl_api_snat_interface_add_del_feature_t * mp, void *handle)
+{
+ u8 * s;
+
+ s = format (0, "SCRIPT: snat_interface_add_del_feature ");
+ s = format (s, "sw_if_index %d %s %s",
+ clib_host_to_net_u32(mp->sw_if_index),
+ mp->is_inside ? "in":"out",
+ mp->is_add ? "" : "del");
+
+ FINISH;
+}
+
+static void
+send_snat_interface_details
+(snat_interface_t * i, unix_shared_memory_queue_t * q, u32 context)
+{
+ vl_api_snat_interface_details_t *rmp;
+ snat_main_t * sm = &snat_main;
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_SNAT_INTERFACE_DETAILS+sm->msg_id_base);
+ rmp->sw_if_index = ntohl (i->sw_if_index);
+ rmp->is_inside = i->is_inside;
+ rmp->context = context;
+
+ vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_snat_interface_dump_t_handler
+(vl_api_snat_interface_dump_t * mp)
+{
+ unix_shared_memory_queue_t *q;
+ snat_main_t * sm = &snat_main;
+ snat_interface_t * i;
+
+ q = vl_api_client_index_to_input_queue (mp->client_index);
+ if (q == 0)
+ return;
+
+ pool_foreach (i, sm->interfaces,
+ ({
+ send_snat_interface_details(i, q, mp->context);
+ }));
+}
+
+static void *vl_api_snat_interface_dump_t_print
+(vl_api_snat_interface_dump_t *mp, void * handle)
+{
+ u8 *s;
+
+ s = format (0, "SCRIPT: snat_interface_dump ");
+
+ FINISH;
+}static void
+
+vl_api_snat_add_static_mapping_t_handler
+(vl_api_snat_add_static_mapping_t * mp)
+{
+ snat_main_t * sm = &snat_main;
+ vl_api_snat_add_static_mapping_reply_t * rmp;
+ ip4_address_t local_addr, external_addr;
+ u16 local_port = 0, external_port = 0;
+ u32 vrf_id;
+ int rv = 0;
+
+ if (mp->is_ip4 != 1)
+ {
+ rv = VNET_API_ERROR_UNIMPLEMENTED;
+ goto send_reply;
+ }
+
+ memcpy (&local_addr.as_u8, mp->local_ip_address, 4);
+ memcpy (&external_addr.as_u8, mp->external_ip_address, 4);
+ if (mp->addr_only == 0)
+ {
+ local_port = clib_net_to_host_u16 (mp->local_port);
+ external_port = clib_net_to_host_u16 (mp->external_port);
+ }
+ vrf_id = clib_net_to_host_u32 (mp->vrf_id);
+
+ rv = snat_add_static_mapping(local_addr, external_addr, local_port,
+ external_port, vrf_id, mp->addr_only,
+ mp->is_add);
+
+ send_reply:
+ REPLY_MACRO (VL_API_SNAT_ADD_ADDRESS_RANGE_REPLY);
+}
+
+static void *vl_api_snat_add_static_mapping_t_print
+(vl_api_snat_add_static_mapping_t *mp, void * handle)
+{
+ u8 * s;
+
+ s = format (0, "SCRIPT: snat_add_static_mapping ");
+ s = format (s, "local_addr %U external_addr %U ",
+ format_ip4_address, mp->local_ip_address,
+ format_ip4_address, mp->external_ip_address);
+
+ if (mp->addr_only == 0)
+ s = format (s, "local_port %d external_port %d ",
+ clib_net_to_host_u16 (mp->local_port),
+ clib_net_to_host_u16 (mp->external_port));
+
+ if (mp->vrf_id != ~0)
+ s = format (s, "vrf %d", clib_net_to_host_u32 (mp->vrf_id));
+
+ FINISH;
+}
+
+static void
+send_snat_static_mapping_details
+(snat_static_mapping_t * m, unix_shared_memory_queue_t * q, u32 context)
+{
+ vl_api_snat_static_mapping_details_t *rmp;
+ snat_main_t * sm = &snat_main;
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_SNAT_STATIC_MAPPING_DETAILS+sm->msg_id_base);
+ rmp->is_ip4 = 1;
+ rmp->addr_only = m->addr_only;
+ clib_memcpy (rmp->local_ip_address, &(m->local_addr), 4);
+ clib_memcpy (rmp->external_ip_address, &(m->external_addr), 4);
+ rmp->local_port = htons (m->local_port);
+ rmp->external_port = htons (m->external_port);
+ rmp->vrf_id = htonl (m->vrf_id);
+ rmp->context = context;
+
+ vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_snat_static_mapping_dump_t_handler
+(vl_api_snat_static_mapping_dump_t * mp)
+{
+ unix_shared_memory_queue_t *q;
+ snat_main_t * sm = &snat_main;
+ snat_static_mapping_t * m;
+
+ q = vl_api_client_index_to_input_queue (mp->client_index);
+ if (q == 0)
+ return;
+
+ pool_foreach (m, sm->static_mappings,
+ ({
+ send_snat_static_mapping_details (m, q, mp->context);
+ }));
+}
+
+static void *vl_api_snat_static_mapping_dump_t_print
+(vl_api_snat_static_mapping_dump_t *mp, void * handle)
+{
+ u8 *s;
+
+ s = format (0, "SCRIPT: snat_static_mapping_dump ");
+
+ FINISH;
+}
+
+static void
+vl_api_snat_control_ping_t_handler
+(vl_api_snat_control_ping_t * mp)
+{
+ vl_api_snat_control_ping_reply_t *rmp;
+ snat_main_t * sm = &snat_main;
+ int rv = 0;
+
+ REPLY_MACRO2(VL_API_SNAT_CONTROL_PING_REPLY,
+ ({
+ rmp->vpe_pid = ntohl (getpid());
+ }));
+}
+
+static void *vl_api_snat_control_ping_t_print
+(vl_api_snat_control_ping_t *mp, void * handle)
+{
+ u8 *s;
+
+ s = format (0, "SCRIPT: snat_control_ping ");
+
+ FINISH;
+}
+
+static void
+vl_api_snat_show_config_t_handler
+(vl_api_snat_show_config_t * mp)
+{
+ vl_api_snat_show_config_reply_t *rmp;
+ snat_main_t * sm = &snat_main;
+ int rv = 0;
+
+ REPLY_MACRO2(VL_API_SNAT_SHOW_CONFIG_REPLY,
+ ({
+ rmp->translation_buckets = htonl (sm->translation_buckets);
+ rmp->translation_memory_size = htonl (sm->translation_memory_size);
+ rmp->user_buckets = htonl (sm->user_buckets);
+ rmp->user_memory_size = htonl (sm->user_memory_size);
+ rmp->max_translations_per_user = htonl (sm->max_translations_per_user);
+ rmp->outside_vrf_id = htonl (sm->outside_vrf_id);
+ rmp->inside_vrf_id = htonl (sm->inside_vrf_id);
+ rmp->static_mapping_only = sm->static_mapping_only;
+ rmp->static_mapping_connection_tracking =
+ sm->static_mapping_connection_tracking;
+ }));
+}
+
+static void *vl_api_snat_show_config_t_print
+(vl_api_snat_show_config_t *mp, void * handle)
+{
+ u8 *s;
+
+ s = format (0, "SCRIPT: snat_show_config ");
+
+ FINISH;
+}
+
+static void
+vl_api_snat_set_workers_t_handler
+(vl_api_snat_set_workers_t * mp)
+{
+ snat_main_t * sm = &snat_main;
+ vl_api_snat_set_workers_reply_t * rmp;
+ int rv = 0;
+ uword *bitmap = 0;
+ u64 mask = clib_net_to_host_u64 (mp->worker_mask);
+
+ if (sm->num_workers < 2)
+ {
+ rv = VNET_API_ERROR_FEATURE_DISABLED;
+ goto send_reply;
+ }
+
+ bitmap = clib_bitmap_set_multiple (bitmap, 0, mask, BITS (mask));
+ rv = snat_set_workers(bitmap);
+ clib_bitmap_free (bitmap);
+
+ send_reply:
+ REPLY_MACRO (VL_API_SNAT_SET_WORKERS_REPLY);
+}
+
+static void *vl_api_snat_set_workers_t_print
+(vl_api_snat_set_workers_t *mp, void * handle)
+{
+ u8 * s;
+ uword *bitmap = 0;
+ u8 first = 1;
+ int i;
+ u64 mask = clib_net_to_host_u64 (mp->worker_mask);
+
+ s = format (0, "SCRIPT: snat_set_workers ");
+ bitmap = clib_bitmap_set_multiple (bitmap, 0, mask, BITS (mask));
+ clib_bitmap_foreach (i, bitmap,
+ ({
+ if (first)
+ s = format (s, "%d", i);
+ else
+ s = format (s, ",%d", i);
+ first = 0;
+ }));
+ clib_bitmap_free (bitmap);
+ FINISH;
+}
+
+static void
+send_snat_worker_details
+(u32 worker_index, unix_shared_memory_queue_t * q, u32 context)
+{
+ vl_api_snat_worker_details_t *rmp;
+ snat_main_t * sm = &snat_main;
+ vlib_worker_thread_t *w =
+ vlib_worker_threads + worker_index + sm->first_worker_index;
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ memset (rmp, 0, sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (VL_API_SNAT_WORKER_DETAILS+sm->msg_id_base);
+ rmp->context = context;
+ rmp->worker_index = htonl (worker_index);
+ rmp->lcore_id = htonl (w->lcore_id);
+ strncpy ((char *) rmp->name, (char *) w->name, ARRAY_LEN (rmp->name) - 1);
+
+ vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_snat_worker_dump_t_handler
+(vl_api_snat_worker_dump_t * mp)
+{
+ unix_shared_memory_queue_t *q;
+ snat_main_t * sm = &snat_main;
+ u32 * worker_index;
+
+ q = vl_api_client_index_to_input_queue (mp->client_index);
+ if (q == 0)
+ return;
+
+ vec_foreach (worker_index, sm->workers)
+ {
+ send_snat_worker_details(*worker_index, q, mp->context);
+ }
+}
+
+static void *vl_api_snat_worker_dump_t_print
+(vl_api_snat_worker_dump_t *mp, void * handle)
+{
+ u8 *s;
+
+ s = format (0, "SCRIPT: snat_worker_dump ");
+
+ FINISH;
+}
+
+/* List of message types that this plugin understands */
+#define foreach_snat_plugin_api_msg \
+_(SNAT_ADD_ADDRESS_RANGE, snat_add_address_range) \
+_(SNAT_INTERFACE_ADD_DEL_FEATURE, snat_interface_add_del_feature) \
+_(SNAT_ADD_STATIC_MAPPING, snat_add_static_mapping) \
+_(SNAT_CONTROL_PING, snat_control_ping) \
+_(SNAT_STATIC_MAPPING_DUMP, snat_static_mapping_dump) \
+_(SNAT_SHOW_CONFIG, snat_show_config) \
+_(SNAT_ADDRESS_DUMP, snat_address_dump) \
+_(SNAT_INTERFACE_DUMP, snat_interface_dump) \
+_(SNAT_SET_WORKERS, snat_set_workers) \
+_(SNAT_WORKER_DUMP, snat_worker_dump)
+
+/* Set up the API message handling tables */
+static clib_error_t *
+snat_plugin_api_hookup (vlib_main_t *vm)
+{
+ snat_main_t * sm __attribute__ ((unused)) = &snat_main;
+#define _(N,n) \
+ vl_msg_api_set_handlers((VL_API_##N + sm->msg_id_base), \
+ #n, \
+ vl_api_##n##_t_handler, \
+ vl_noop_handler, \
+ vl_api_##n##_t_endian, \
+ vl_api_##n##_t_print, \
+ sizeof(vl_api_##n##_t), 1);
+ foreach_snat_plugin_api_msg;
+#undef _
+
+ return 0;
+}
+
+#define vl_msg_name_crc_list
+#include <snat/snat_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+static void
+setup_message_id_table (snat_main_t * sm, api_main_t * am)
+{
+#define _(id,n,crc) \
+ vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id + sm->msg_id_base);
+ foreach_vl_msg_name_crc_snat;
+#undef _
+}
+
+static void plugin_custom_dump_configure (snat_main_t * sm)
+{
+#define _(n,f) sm->api_main->msg_print_handlers \
+ [VL_API_##n + sm->msg_id_base] \
+ = (void *) vl_api_##f##_t_print;
+ foreach_snat_plugin_api_msg;
+#undef _
+}
+
+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;
+ u8 * name;
+ uword *p;
+ vlib_thread_registration_t *tr;
+ vlib_thread_main_t *tm = vlib_get_thread_main ();
+ uword *bitmap = 0;
+ u32 i;
+
+ name = format (0, "snat_%08x%c", api_version, 0);
+
+ /* Ask for a correctly-sized block of API message decode slots */
+ sm->msg_id_base = vl_msg_api_get_msg_ids
+ ((char *) name, VL_MSG_FIRST_AVAILABLE);
+
+ 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->workers = 0;
+ sm->fq_in2out_index = ~0;
+ sm->fq_out2in_index = ~0;
+
+ 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;
+ }
+ }
+
+ /* 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);
+ }
+
+ error = snat_plugin_api_hookup (vm);
+
+ /* Add our API messages to the global name_crc hash table */
+ setup_message_id_table (sm, &api_main);
+
+ plugin_custom_dump_configure (sm);
+ vec_free(name);
+
+ 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;
+
+ ASSERT (clib_bitmap_get_no_check (a->busy_port_bitmap,
+ port_host_byte_order) == 1);
+
+ clib_bitmap_set_no_check (a->busy_port_bitmap, port_host_byte_order, 0);
+ a->busy_ports--;
+}
+
+/**
+ * @brief Match SNAT static mapping.
+ *
+ * @param sm SNAT 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.
+ *
+ * @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)
+{
+ clib_bihash_kv_8_8_t kv, value;
+ snat_static_mapping_t *m;
+ snat_static_mapping_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.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;
+ 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;
+ }
+
+ return 0;
+}
+
+int snat_alloc_outside_address_and_port (snat_main_t * sm,
+ 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++)
+ {
+ if (sm->addresses[i].busy_ports < (65535-1024))
+ {
+ a = sm->addresses + i;
+
+ while (1)
+ {
+ portnum = random_u32 (&sm->random_seed);
+ portnum &= 0xFFFF;
+ if (portnum < 1024)
+ continue;
+ if (clib_bitmap_get_no_check (a->busy_port_bitmap, portnum))
+ continue;
+ clib_bitmap_set_no_check (a->busy_port_bitmap, portnum, 1);
+ a->busy_ports++;
+ /* Caller sets protocol and fib index */
+ k->addr = a->addr;
+ k->port = clib_host_to_net_u16(portnum);
+ *address_indexp = i;
+ return 0;
+ }
+ }
+ }
+ /* Totally out of translations to use... */
+ 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;
+ int i, count;
+ int is_add = 1;
+ int rv = 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, "%U", unformat_ip4_address, &start_addr))
+ end_addr = start_addr;
+ else if (unformat (line_input, "del"))
+ is_add = 0;
+ else
+ return clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, input);
+ }
+ unformat_free (line_input);
+
+ if (sm->static_mapping_only)
+ return clib_error_return (0, "static mapping only mode");
+
+ 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)
+ return clib_error_return (0, "end address less than start address");
+
+ 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);
+ else
+ rv = snat_del_address (sm, this_addr);
+
+ switch (rv)
+ {
+ case VNET_API_ERROR_NO_SUCH_ENTRY:
+ return clib_error_return (0, "S-NAT address not exist.");
+ break;
+ case VNET_API_ERROR_UNSPECIFIED:
+ return clib_error_return (0, "S-NAT address used in static mapping.");
+ break;
+ default:
+ break;
+ }
+
+ increment_v4_address (&this_addr);
+ }
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (add_address_command, static) = {
+ .path = "snat add address",
+ .short_help = "snat add addresses <ip4-range-start> [- <ip4-range-end>] [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;
+ 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, "del"))
+ is_del = 1;
+ else
+ return clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, input);
+ }
+ unformat_free (line_input);
+
+ 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];
+ snat_interface_add_del (sw_if_index, 1, is_del);
+ }
+ }
+
+ 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];
+ snat_interface_add_del (sw_if_index, 0, is_del);
+ }
+ }
+
+ 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 snat",
+ .function = snat_feature_command_fn,
+ .short_help = "set interface snat in <intfc> out <intfc> [del]",
+};
+
+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;
+ int rv;
+
+ /* 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, "vrf %u", &vrf_id))
+ ;
+ else if (unformat (line_input, "del"))
+ is_add = 0;
+ else
+ return clib_error_return (0, "unknown input: '%U'",
+ format_unformat_error, line_input);
+ }
+ unformat_free (line_input);
+
+ rv = snat_add_static_mapping(l_addr, e_addr, (u16) l_port, (u16) e_port,
+ vrf_id, addr_only, is_add);
+
+ switch (rv)
+ {
+ case VNET_API_ERROR_INVALID_VALUE:
+ return clib_error_return (0, "External port already in use.");
+ break;
+ case VNET_API_ERROR_NO_SUCH_ENTRY:
+ if (is_add)
+ return clib_error_return (0, "External addres must be allocated.");
+ else
+ return clib_error_return (0, "Mapping not exist.");
+ break;
+ case VNET_API_ERROR_NO_SUCH_FIB:
+ return clib_error_return (0, "No such VRF id.");
+ case VNET_API_ERROR_VALUE_EXIST:
+ return clib_error_return (0, "Mapping already exist.");
+ default:
+ break;
+ }
+
+ 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 use:
+ * vpp# snat add static mapping local 10.0.0.3 6303 external 4.4.4.4 3606
+ * If not runnig "static mapping only" S-NAT plugin mode use before:
+ * vpp# snat add address 4.4.4.4
+ * To create static mapping between local and external address use:
+ * vpp# snat add static mapping local 10.0.0.3 external 4.4.4.4
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (add_static_mapping_command, static) = {
+ .path = "snat add static mapping",
+ .function = add_static_mapping_command_fn,
+ .short_help =
+ "snat add static mapping local <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;
+
+ /* 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
+ return clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, input);
+ }
+ unformat_free (line_input);
+
+ if (bitmap == 0)
+ return clib_error_return (0, "List of workers must be specified.");
+
+ rv = snat_set_workers(bitmap);
+
+ clib_bitmap_free (bitmap);
+
+ switch (rv)
+ {
+ case VNET_API_ERROR_INVALID_WORKER:
+ return clib_error_return (0, "Invalid worker(s).");
+ break;
+ case VNET_API_ERROR_FEATURE_DISABLED:
+ return clib_error_return (0,
+ "Supported only if 2 or more workes available.");
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+/*?
+ * @cliexpar
+ * @cliexstart{set snat workers}
+ * Set SNAT 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 snat workers",
+ .function = set_workers_command_fn,
+ .short_help =
+ "set snat workers <workers-list>",
+};
+
+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;
+ vlib_thread_main_t *tm = vlib_get_thread_main ();
+
+ 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
+ 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 = ~0;
+ sm->inside_vrf_id = inside_vrf_id;
+ sm->inside_fib_index = ~0;
+ sm->static_mapping_only = static_mapping_only;
+ sm->static_mapping_connection_tracking = static_mapping_connection_tracking;
+
+ if (!static_mapping_only ||
+ (static_mapping_only && static_mapping_connection_tracking))
+ {
+ 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);
+
+ vec_validate (sm->per_thread_data, tm->n_vlib_mains - 1);
+
+ 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_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, "snat");
+
+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 *);
+
+ 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, "local %U:%d external %U:%d vrf %d",
+ format_ip4_address, &m->local_addr, m->local_port,
+ format_ip4_address, &m->external_addr, m->external_port,
+ m->vrf_id);
+
+ 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;
+ uword j = 0;
+
+ 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, "SNAT mode: static mapping only connection "
+ "tracking");
+ else
+ vlib_cli_output (vm, "SNAT mode: static mapping only");
+ }
+ else
+ {
+ vlib_cli_output (vm, "SNAT 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");
+ }));
+
+ vec_foreach (ap, sm->addresses)
+ {
+ u8 * s = format (0, "");
+ vlib_cli_output (vm, "%U", format_ip4_address, &ap->addr);
+ clib_bitmap_foreach (j, ap->busy_port_bitmap,
+ ({
+ s = format (s, " %d", j);
+ }));
+ vlib_cli_output (vm, " %d busy ports:%v", ap->busy_ports, s);
+ }
+ }
+
+ 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, " %v", w->name);
+ }
+ }
+ }
+
+ 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 (%v 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);
+ }));
+ }
+ }
+ }
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (show_snat_command, static) = {
+ .path = "show snat",
+ .short_help = "show snat",
+ .function = show_snat_command_fn,
+};