nat: move nat64 to a subfeature

Type: refactor

Change-Id: I3b9e17164647d2019b1f40cffeed63393345219e
Signed-off-by: Filip Varga <fivarga@cisco.com>

1 files changed, 458 insertions, 0 deletions

diff --git a/src/plugins/nat/nat64/nat64_api.c b/src/plugins/nat/nat64/nat64_api.c
new file mode 100644
index 00000000000..e64b6434fd2
--- /dev/null
+++ b/src/plugins/nat/nat64/nat64_api.c
@@ -0,0 +1,458 @@
+/*
+ * Copyright (c) 2020 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/ip/ip_types_api.h>
+#include <vlibmemory/api.h>
+#include <nat/nat64/nat64.h>
+#include <nat/nat64/nat64.api_enum.h>
+#include <nat/nat64/nat64.api_types.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/ip/ip.h>
+
+#define REPLY_MSG_ID_BASE nm->msg_id_base
+#include <vlibapi/api_helper_macros.h>
+
+static void
+  vl_api_nat64_plugin_enable_disable_t_handler
+  (vl_api_nat64_plugin_enable_disable_t * mp)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_plugin_enable_disable_reply_t *rmp;
+  nat64_config_t c = { 0 };
+  int rv = 0;
+  if (mp->enable)
+    {
+      c.bib_buckets = ntohl (mp->bib_buckets);
+      c.bib_memory_size = ntohl (mp->bib_memory_size);
+      c.st_buckets = ntohl (mp->st_buckets);
+      c.st_memory_size = ntohl (mp->st_memory_size);
+      rv = nat64_plugin_enable (c);
+    }
+  else
+    {
+      rv = nat64_plugin_disable ();
+    }
+  REPLY_MACRO (VL_API_NAT64_PLUGIN_ENABLE_DISABLE_REPLY);
+}
+
+static void
+vl_api_nat64_set_timeouts_t_handler (vl_api_nat64_set_timeouts_t * mp)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_set_timeouts_reply_t *rmp;
+  int rv = 0;
+
+  nm->udp_timeout = ntohl (mp->udp);
+  nm->tcp_est_timeout = ntohl (mp->tcp_established);
+  nm->tcp_trans_timeout = ntohl (mp->tcp_transitory);
+  nm->icmp_timeout = ntohl (mp->icmp);
+
+  REPLY_MACRO (VL_API_NAT64_SET_TIMEOUTS_REPLY);
+}
+
+static void
+vl_api_nat64_get_timeouts_t_handler (vl_api_nat64_get_timeouts_t * mp)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_get_timeouts_reply_t *rmp;
+  int rv = 0;
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_NAT64_GET_TIMEOUTS_REPLY,
+  ({
+    rmp->udp = htonl (nm->udp_timeout);
+    rmp->tcp_established = htonl (nm->tcp_est_timeout);
+    rmp->tcp_transitory = htonl (nm->tcp_trans_timeout);
+    rmp->icmp = htonl (nm->icmp_timeout);
+  }))
+  /* *INDENT-ON* */
+}
+
+static void
+  vl_api_nat64_add_del_pool_addr_range_t_handler
+  (vl_api_nat64_add_del_pool_addr_range_t * mp)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_add_del_pool_addr_range_reply_t *rmp;
+  int rv = 0;
+  ip4_address_t this_addr;
+  u32 start_host_order, end_host_order;
+  u32 vrf_id;
+  int i, count;
+  u32 *tmp;
+
+  tmp = (u32 *) mp->start_addr;
+  start_host_order = clib_host_to_net_u32 (tmp[0]);
+  tmp = (u32 *) mp->end_addr;
+  end_host_order = clib_host_to_net_u32 (tmp[0]);
+
+  count = (end_host_order - start_host_order) + 1;
+
+  vrf_id = clib_host_to_net_u32 (mp->vrf_id);
+
+  memcpy (&this_addr.as_u8, mp->start_addr, 4);
+
+  for (i = 0; i < count; i++)
+    {
+      if ((rv = nat64_add_del_pool_addr (0, &this_addr, vrf_id, mp->is_add)))
+	goto send_reply;
+
+      increment_v4_address (&this_addr);
+    }
+
+send_reply:
+  REPLY_MACRO (VL_API_NAT64_ADD_DEL_POOL_ADDR_RANGE_REPLY);
+}
+
+typedef struct nat64_api_walk_ctx_t_
+{
+  vl_api_registration_t *reg;
+  u32 context;
+  nat64_db_t *db;
+} nat64_api_walk_ctx_t;
+
+static int
+nat64_api_pool_walk (nat64_address_t * a, void *arg)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_pool_addr_details_t *rmp;
+  nat64_api_walk_ctx_t *ctx = arg;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  clib_memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_NAT64_POOL_ADDR_DETAILS + nm->msg_id_base);
+  clib_memcpy (rmp->address, &(a->addr), 4);
+  if (a->fib_index != ~0)
+    {
+      fib_table_t *fib = fib_table_get (a->fib_index, FIB_PROTOCOL_IP6);
+      if (!fib)
+	return -1;
+      rmp->vrf_id = ntohl (fib->ft_table_id);
+    }
+  else
+    rmp->vrf_id = ~0;
+  rmp->context = ctx->context;
+
+  vl_api_send_msg (ctx->reg, (u8 *) rmp);
+
+  return 0;
+}
+
+static void
+vl_api_nat64_pool_addr_dump_t_handler (vl_api_nat64_pool_addr_dump_t * mp)
+{
+  vl_api_registration_t *reg;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  nat64_api_walk_ctx_t ctx = {
+    .reg = reg,
+    .context = mp->context,
+  };
+
+  nat64_pool_addr_walk (nat64_api_pool_walk, &ctx);
+}
+
+static void
+vl_api_nat64_add_del_interface_t_handler (vl_api_nat64_add_del_interface_t *
+					  mp)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_add_del_interface_reply_t *rmp;
+  int rv = 0;
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  rv =
+    nat64_interface_add_del (ntohl (mp->sw_if_index),
+			     mp->flags & NAT_API_IS_INSIDE, mp->is_add);
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_NAT64_ADD_DEL_INTERFACE_REPLY);
+}
+
+static int
+nat64_api_interface_walk (nat64_interface_t * i, void *arg)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_interface_details_t *rmp;
+  nat64_api_walk_ctx_t *ctx = arg;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  clib_memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_NAT64_INTERFACE_DETAILS + nm->msg_id_base);
+  rmp->sw_if_index = ntohl (i->sw_if_index);
+
+  if (nat64_interface_is_inside (i))
+    rmp->flags |= NAT_API_IS_INSIDE;
+  if (nat64_interface_is_outside (i))
+    rmp->flags |= NAT_API_IS_OUTSIDE;
+
+  rmp->context = ctx->context;
+
+  vl_api_send_msg (ctx->reg, (u8 *) rmp);
+
+  return 0;
+}
+
+static void
+vl_api_nat64_interface_dump_t_handler (vl_api_nat64_interface_dump_t * mp)
+{
+  vl_api_registration_t *reg;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  nat64_api_walk_ctx_t ctx = {
+    .reg = reg,
+    .context = mp->context,
+  };
+
+  nat64_interfaces_walk (nat64_api_interface_walk, &ctx);
+}
+
+static void
+  vl_api_nat64_add_del_static_bib_t_handler
+  (vl_api_nat64_add_del_static_bib_t * mp)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_add_del_static_bib_reply_t *rmp;
+  ip6_address_t in_addr;
+  ip4_address_t out_addr;
+  int rv = 0;
+
+  memcpy (&in_addr.as_u8, mp->i_addr, 16);
+  memcpy (&out_addr.as_u8, mp->o_addr, 4);
+
+  rv =
+    nat64_add_del_static_bib_entry (&in_addr, &out_addr,
+				    clib_net_to_host_u16 (mp->i_port),
+				    clib_net_to_host_u16 (mp->o_port),
+				    mp->proto,
+				    clib_net_to_host_u32 (mp->vrf_id),
+				    mp->is_add);
+
+  REPLY_MACRO (VL_API_NAT64_ADD_DEL_STATIC_BIB_REPLY);
+}
+
+static int
+nat64_api_bib_walk (nat64_db_bib_entry_t * bibe, void *arg)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_bib_details_t *rmp;
+  nat64_api_walk_ctx_t *ctx = arg;
+  fib_table_t *fib;
+
+  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
+  if (!fib)
+    return -1;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  clib_memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_NAT64_BIB_DETAILS + nm->msg_id_base);
+  rmp->context = ctx->context;
+  clib_memcpy (rmp->i_addr, &(bibe->in_addr), 16);
+  clib_memcpy (rmp->o_addr, &(bibe->out_addr), 4);
+  rmp->i_port = bibe->in_port;
+  rmp->o_port = bibe->out_port;
+  rmp->vrf_id = ntohl (fib->ft_table_id);
+  rmp->proto = bibe->proto;
+  if (bibe->is_static)
+    rmp->flags |= NAT_API_IS_STATIC;
+  rmp->ses_num = ntohl (bibe->ses_num);
+
+  vl_api_send_msg (ctx->reg, (u8 *) rmp);
+
+  return 0;
+}
+
+static void
+vl_api_nat64_bib_dump_t_handler (vl_api_nat64_bib_dump_t * mp)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_registration_t *reg;
+  nat64_db_t *db;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  nat64_api_walk_ctx_t ctx = {
+    .reg = reg,
+    .context = mp->context,
+  };
+
+  /* *INDENT-OFF* */
+  vec_foreach (db, nm->db)
+    nat64_db_bib_walk (db, mp->proto, nat64_api_bib_walk, &ctx);
+  /* *INDENT-ON* */
+}
+
+static int
+nat64_api_st_walk (nat64_db_st_entry_t * ste, void *arg)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_st_details_t *rmp;
+  nat64_api_walk_ctx_t *ctx = arg;
+  nat64_db_bib_entry_t *bibe;
+  fib_table_t *fib;
+
+  bibe = nat64_db_bib_entry_by_index (ctx->db, ste->proto, ste->bibe_index);
+  if (!bibe)
+    return -1;
+
+  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
+  if (!fib)
+    return -1;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  clib_memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_NAT64_ST_DETAILS + nm->msg_id_base);
+  rmp->context = ctx->context;
+  clib_memcpy (rmp->il_addr, &(bibe->in_addr), 16);
+  clib_memcpy (rmp->ol_addr, &(bibe->out_addr), 4);
+  rmp->il_port = bibe->in_port;
+  rmp->ol_port = bibe->out_port;
+  clib_memcpy (rmp->ir_addr, &(ste->in_r_addr), 16);
+  clib_memcpy (rmp->or_addr, &(ste->out_r_addr), 4);
+  rmp->il_port = ste->r_port;
+  rmp->vrf_id = ntohl (fib->ft_table_id);
+  rmp->proto = ste->proto;
+
+  vl_api_send_msg (ctx->reg, (u8 *) rmp);
+
+  return 0;
+}
+
+static void
+vl_api_nat64_st_dump_t_handler (vl_api_nat64_st_dump_t * mp)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_registration_t *reg;
+  nat64_db_t *db;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  nat64_api_walk_ctx_t ctx = {
+    .reg = reg,
+    .context = mp->context,
+  };
+
+  /* *INDENT-OFF* */
+  vec_foreach (db, nm->db)
+    {
+      ctx.db = db;
+      nat64_db_st_walk (db, mp->proto, nat64_api_st_walk, &ctx);
+    }
+  /* *INDENT-ON* */
+}
+
+static void
+vl_api_nat64_add_del_prefix_t_handler (vl_api_nat64_add_del_prefix_t * mp)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_add_del_prefix_reply_t *rmp;
+  ip6_address_t prefix;
+  int rv = 0;
+
+  memcpy (&prefix.as_u8, mp->prefix.address, 16);
+
+  rv =
+    nat64_add_del_prefix (&prefix, mp->prefix.len,
+			  clib_net_to_host_u32 (mp->vrf_id), mp->is_add);
+  REPLY_MACRO (VL_API_NAT64_ADD_DEL_PREFIX_REPLY);
+}
+
+static int
+nat64_api_prefix_walk (nat64_prefix_t * p, void *arg)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_prefix_details_t *rmp;
+  nat64_api_walk_ctx_t *ctx = arg;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  clib_memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_NAT64_PREFIX_DETAILS + nm->msg_id_base);
+  clib_memcpy (rmp->prefix.address, &(p->prefix), 16);
+  rmp->prefix.len = p->plen;
+  rmp->vrf_id = ntohl (p->vrf_id);
+  rmp->context = ctx->context;
+
+  vl_api_send_msg (ctx->reg, (u8 *) rmp);
+
+  return 0;
+}
+
+static void
+vl_api_nat64_prefix_dump_t_handler (vl_api_nat64_prefix_dump_t * mp)
+{
+  vl_api_registration_t *reg;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  nat64_api_walk_ctx_t ctx = {
+    .reg = reg,
+    .context = mp->context,
+  };
+
+  nat64_prefix_walk (nat64_api_prefix_walk, &ctx);
+}
+
+static void
+  vl_api_nat64_add_del_interface_addr_t_handler
+  (vl_api_nat64_add_del_interface_addr_t * mp)
+{
+  nat64_main_t *nm = &nat64_main;
+  vl_api_nat64_add_del_interface_addr_reply_t *rmp;
+  u32 sw_if_index = ntohl (mp->sw_if_index);
+  int rv = 0;
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  rv = nat64_add_interface_address (sw_if_index, mp->is_add);
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_NAT64_ADD_DEL_INTERFACE_ADDR_REPLY);
+}
+
+/* API definitions */
+#include <vnet/format_fns.h>
+#include <nat/nat64/nat64.api.c>
+
+/* Set up the API message handling tables */
+clib_error_t *
+nat64_api_hookup (vlib_main_t * vm)
+{
+  nat64_main_t *nm = &nat64_main;
+  nm->msg_id_base = setup_message_id_table ();
+  return 0;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */