nat: move deterministic nat to det44 sub feature

Type: refactor

Change-Id: I0bb203102a0e13dd7448e2125925ab356bbd7937
Signed-off-by: Filip Varga <fivarga@cisco.com>

1 files changed, 633 insertions, 0 deletions

diff --git a/src/plugins/nat/det44/det44_api.c b/src/plugins/nat/det44/det44_api.c
new file mode 100644
index 00000000000..7c7b1788009
--- /dev/null
+++ b/src/plugins/nat/det44/det44_api.c
@@ -0,0 +1,633 @@
+/*
+ * 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.
+ */
+
+/**
+ * @file
+ * @brief Deterministic NAT (CGN) plugin API implementation
+ */
+
+#include <vnet/ip/ip_types_api.h>
+#include <nat/det44/det44.h>
+#include <nat/det44/det44.api_enum.h>
+#include <nat/det44/det44.api_types.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/ip/ip.h>
+
+#include <vlibmemory/api.h>
+
+#define REPLY_MSG_ID_BASE dm->msg_id_base
+#include <vlibapi/api_helper_macros.h>
+
+static void
+vl_api_det44_add_del_map_t_handler (vl_api_det44_add_del_map_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_det44_add_del_map_reply_t *rmp;
+  int rv = 0;
+  ip4_address_t in_addr, out_addr;
+  clib_memcpy (&in_addr, mp->in_addr, 4);
+  clib_memcpy (&out_addr, mp->out_addr, 4);
+  rv = snat_det_add_map (&in_addr, mp->in_plen, &out_addr,
+			 mp->out_plen, mp->is_add);
+  REPLY_MACRO (VL_API_DET44_ADD_DEL_MAP_REPLY);
+}
+
+static void
+vl_api_det44_forward_t_handler (vl_api_det44_forward_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_det44_forward_reply_t *rmp;
+  int rv = 0;
+  u16 lo_port = 0, hi_port = 0;
+  snat_det_map_t *m;
+  ip4_address_t in_addr, out_addr;
+
+  out_addr.as_u32 = 0;
+  clib_memcpy (&in_addr, mp->in_addr, 4);
+  m = snat_det_map_by_user (&in_addr);
+  if (!m)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+
+  snat_det_forward (m, &in_addr, &out_addr, &lo_port);
+  hi_port = lo_port + m->ports_per_host - 1;
+
+send_reply:
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_DET44_FORWARD_REPLY,
+  ({
+    rmp->out_port_lo = ntohs (lo_port);
+    rmp->out_port_hi = ntohs (hi_port);
+    clib_memcpy (rmp->out_addr, &out_addr, 4);
+  }))
+  /* *INDENT-ON* */
+}
+
+static void
+vl_api_det44_reverse_t_handler (vl_api_det44_reverse_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_det44_reverse_reply_t *rmp;
+  int rv = 0;
+  ip4_address_t out_addr, in_addr;
+  snat_det_map_t *m;
+
+  in_addr.as_u32 = 0;
+  clib_memcpy (&out_addr, mp->out_addr, 4);
+  m = snat_det_map_by_out (&out_addr);
+  if (!m)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+
+  snat_det_reverse (m, &out_addr, htons (mp->out_port), &in_addr);
+
+send_reply:
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_DET44_REVERSE_REPLY,
+  ({
+    clib_memcpy (rmp->in_addr, &in_addr, 4);
+  }))
+  /* *INDENT-ON* */
+}
+
+static void
+sent_det44_map_details (snat_det_map_t * m, vl_api_registration_t * reg,
+			u32 context)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_det44_map_details_t *rmp;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  clib_memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_DET44_MAP_DETAILS + dm->msg_id_base);
+  clib_memcpy (rmp->in_addr, &m->in_addr, 4);
+  rmp->in_plen = m->in_plen;
+  clib_memcpy (rmp->out_addr, &m->out_addr, 4);
+  rmp->out_plen = m->out_plen;
+  rmp->sharing_ratio = htonl (m->sharing_ratio);
+  rmp->ports_per_host = htons (m->ports_per_host);
+  rmp->ses_num = htonl (m->ses_num);
+  rmp->context = context;
+
+  vl_api_send_msg (reg, (u8 *) rmp);
+}
+
+static void
+vl_api_det44_map_dump_t_handler (vl_api_det44_map_dump_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_registration_t *reg;
+  snat_det_map_t *m;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  /* *INDENT-OFF* */
+  vec_foreach(m, dm->det_maps)
+    sent_det44_map_details(m, reg, mp->context);
+  /* *INDENT-ON* */
+}
+
+static void
+vl_api_det44_close_session_out_t_handler (vl_api_det44_close_session_out_t
+					  * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_det44_close_session_out_reply_t *rmp;
+  ip4_address_t out_addr, ext_addr, in_addr;
+  snat_det_out_key_t key;
+  snat_det_map_t *m;
+  snat_det_session_t *ses;
+  int rv = 0;
+
+  clib_memcpy (&out_addr, mp->out_addr, 4);
+  clib_memcpy (&ext_addr, mp->ext_addr, 4);
+
+  m = snat_det_map_by_out (&out_addr);
+  if (!m)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+  snat_det_reverse (m, &ext_addr, ntohs (mp->out_port), &in_addr);
+  key.ext_host_addr = ext_addr;
+  key.ext_host_port = mp->ext_port;
+  key.out_port = mp->out_port;
+  ses = snat_det_get_ses_by_out (m, &in_addr, key.as_u64);
+  if (!ses)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+  snat_det_ses_close (m, ses);
+
+send_reply:
+  REPLY_MACRO (VL_API_DET44_CLOSE_SESSION_OUT_REPLY);
+}
+
+static void
+vl_api_det44_close_session_in_t_handler (vl_api_det44_close_session_in_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_det44_close_session_in_reply_t *rmp;
+  ip4_address_t in_addr, ext_addr;
+  snat_det_out_key_t key;
+  snat_det_map_t *m;
+  snat_det_session_t *ses;
+  int rv = 0;
+
+  clib_memcpy (&in_addr, mp->in_addr, 4);
+  clib_memcpy (&ext_addr, mp->ext_addr, 4);
+
+  m = snat_det_map_by_user (&in_addr);
+  if (!m)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+  key.ext_host_addr = ext_addr;
+  key.ext_host_port = mp->ext_port;
+  ses = snat_det_find_ses_by_in (m, &in_addr, mp->in_port, key);
+  if (!ses)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+  snat_det_ses_close (m, ses);
+
+send_reply:
+  REPLY_MACRO (VL_API_DET44_CLOSE_SESSION_OUT_REPLY);
+}
+
+static void
+send_det44_session_details (snat_det_session_t * s,
+			    vl_api_registration_t * reg, u32 context)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_det44_session_details_t *rmp;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  clib_memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_DET44_SESSION_DETAILS + dm->msg_id_base);
+  rmp->in_port = s->in_port;
+  clib_memcpy (rmp->ext_addr, &s->out.ext_host_addr, 4);
+  rmp->ext_port = s->out.ext_host_port;
+  rmp->out_port = s->out.out_port;
+  rmp->state = s->state;
+  rmp->expire = ntohl (s->expire);
+  rmp->context = context;
+
+  vl_api_send_msg (reg, (u8 *) rmp);
+}
+
+static void
+vl_api_det44_session_dump_t_handler (vl_api_det44_session_dump_t * mp)
+{
+  vl_api_registration_t *reg;
+  ip4_address_t user_addr;
+  snat_det_map_t *m;
+  snat_det_session_t *s, empty_ses;
+  u16 i;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  clib_memset (&empty_ses, 0, sizeof (empty_ses));
+  clib_memcpy (&user_addr, mp->user_addr, 4);
+  m = snat_det_map_by_user (&user_addr);
+  if (!m)
+    return;
+
+  s = m->sessions + snat_det_user_ses_offset (&user_addr, m->in_plen);
+  for (i = 0; i < DET44_SES_PER_USER; i++)
+    {
+      if (s->out.as_u64)
+	send_det44_session_details (s, reg, mp->context);
+      s++;
+    }
+}
+
+static void
+  vl_api_det44_plugin_enable_disable_t_handler
+  (vl_api_det44_plugin_enable_disable_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_det44_plugin_enable_disable_reply_t *rmp;
+  det44_config_t c = { 0 };
+  int rv = 0;
+  if (mp->enable)
+    {
+      c.outside_vrf_id = ntohl (mp->outside_vrf);
+      c.inside_vrf_id = ntohl (mp->inside_vrf);
+      rv = det44_plugin_enable (c);
+    }
+  else
+    {
+      rv = det44_plugin_disable ();
+    }
+  REPLY_MACRO (VL_API_DET44_PLUGIN_ENABLE_DISABLE_REPLY);
+}
+
+static void
+  vl_api_det44_interface_add_del_feature_t_handler
+  (vl_api_det44_interface_add_del_feature_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_det44_interface_add_del_feature_reply_t *rmp;
+  u32 sw_if_index = ntohl (mp->sw_if_index);
+  int rv = 0;
+  VALIDATE_SW_IF_INDEX (mp);
+  rv = det44_interface_add_del (sw_if_index, mp->is_inside, !mp->is_add);
+  BAD_SW_IF_INDEX_LABEL;
+  REPLY_MACRO (VL_API_DET44_INTERFACE_ADD_DEL_FEATURE_REPLY);
+}
+
+static void
+det44_send_interface_details (det44_interface_t * i,
+			      vl_api_registration_t * reg, u32 context)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_det44_interface_details_t *rmp;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  clib_memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_DET44_INTERFACE_DETAILS + dm->msg_id_base);
+  rmp->sw_if_index = ntohl (i->sw_if_index);
+  rmp->is_outside = det44_interface_is_outside (i);
+  rmp->is_inside = det44_interface_is_inside (i);
+  rmp->context = context;
+  vl_api_send_msg (reg, (u8 *) rmp);
+}
+
+static void
+vl_api_det44_interface_dump_t_handler (vl_api_det44_interface_dump_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_registration_t *reg;
+  det44_interface_t *i;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  /* *INDENT-OFF* */
+  pool_foreach (i, dm->interfaces,
+  ({
+    det44_send_interface_details(i, reg, mp->context);
+  }));
+  /* *INDENT-ON* */
+}
+
+static void
+vl_api_det44_set_timeouts_t_handler (vl_api_det44_set_timeouts_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_det44_set_timeouts_reply_t *rmp;
+  nat_timeouts_t timeouts;
+  int rv = 0;
+  timeouts.udp = ntohl (mp->udp);
+  timeouts.tcp.established = ntohl (mp->tcp_established);
+  timeouts.tcp.transitory = ntohl (mp->tcp_transitory);
+  timeouts.icmp = ntohl (mp->icmp);
+  rv = det44_set_timeouts (&timeouts);
+  REPLY_MACRO (VL_API_DET44_SET_TIMEOUTS_REPLY);
+}
+
+static void
+vl_api_det44_get_timeouts_t_handler (vl_api_det44_get_timeouts_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_det44_get_timeouts_reply_t *rmp;
+  nat_timeouts_t timeouts;
+  int rv = 0;
+  timeouts = det44_get_timeouts ();
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_DET44_GET_TIMEOUTS_REPLY,
+  ({
+    rmp->udp = htonl (timeouts.udp);
+    rmp->tcp_established = htonl (timeouts.tcp.established);
+    rmp->tcp_transitory = htonl (timeouts.tcp.transitory);
+    rmp->icmp = htonl (timeouts.icmp);
+  }))
+  /* *INDENT-ON* */
+}
+
+/*
+ * Obsolete deterministic API to be removed
+ */
+
+static void
+vl_api_nat_det_add_del_map_t_handler (vl_api_nat_det_add_del_map_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_nat_det_add_del_map_reply_t *rmp;
+  int rv = 0;
+  ip4_address_t in_addr, out_addr;
+
+  clib_memcpy (&in_addr, mp->in_addr, 4);
+  clib_memcpy (&out_addr, mp->out_addr, 4);
+  rv = snat_det_add_map (&in_addr, mp->in_plen, &out_addr,
+			 mp->out_plen, mp->is_add);
+  REPLY_MACRO (VL_API_NAT_DET_ADD_DEL_MAP_REPLY);
+}
+
+static void
+vl_api_nat_det_forward_t_handler (vl_api_nat_det_forward_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_nat_det_forward_reply_t *rmp;
+  int rv = 0;
+  u16 lo_port = 0, hi_port = 0;
+  snat_det_map_t *m;
+  ip4_address_t in_addr, out_addr;
+
+  out_addr.as_u32 = 0;
+  clib_memcpy (&in_addr, mp->in_addr, 4);
+  m = snat_det_map_by_user (&in_addr);
+  if (!m)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+
+  snat_det_forward (m, &in_addr, &out_addr, &lo_port);
+  hi_port = lo_port + m->ports_per_host - 1;
+
+send_reply:
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_NAT_DET_FORWARD_REPLY,
+  ({
+    rmp->out_port_lo = ntohs (lo_port);
+    rmp->out_port_hi = ntohs (hi_port);
+    clib_memcpy (rmp->out_addr, &out_addr, 4);
+  }))
+  /* *INDENT-ON* */
+}
+
+static void
+vl_api_nat_det_reverse_t_handler (vl_api_nat_det_reverse_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_nat_det_reverse_reply_t *rmp;
+  int rv = 0;
+  ip4_address_t out_addr, in_addr;
+  snat_det_map_t *m;
+
+  in_addr.as_u32 = 0;
+  clib_memcpy (&out_addr, mp->out_addr, 4);
+  m = snat_det_map_by_out (&out_addr);
+  if (!m)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+
+  snat_det_reverse (m, &out_addr, htons (mp->out_port), &in_addr);
+
+send_reply:
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_NAT_DET_REVERSE_REPLY,
+  ({
+    clib_memcpy (rmp->in_addr, &in_addr, 4);
+  }))
+  /* *INDENT-ON* */
+}
+
+static void
+sent_nat_det_map_details (snat_det_map_t * m, vl_api_registration_t * reg,
+			  u32 context)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_nat_det_map_details_t *rmp;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  clib_memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_NAT_DET_MAP_DETAILS + dm->msg_id_base);
+  clib_memcpy (rmp->in_addr, &m->in_addr, 4);
+  rmp->in_plen = m->in_plen;
+  clib_memcpy (rmp->out_addr, &m->out_addr, 4);
+  rmp->out_plen = m->out_plen;
+  rmp->sharing_ratio = htonl (m->sharing_ratio);
+  rmp->ports_per_host = htons (m->ports_per_host);
+  rmp->ses_num = htonl (m->ses_num);
+  rmp->context = context;
+
+  vl_api_send_msg (reg, (u8 *) rmp);
+}
+
+static void
+vl_api_nat_det_map_dump_t_handler (vl_api_nat_det_map_dump_t * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_registration_t *reg;
+  snat_det_map_t *m;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  /* *INDENT-OFF* */
+  vec_foreach(m, dm->det_maps)
+    sent_nat_det_map_details(m, reg, mp->context);
+  /* *INDENT-ON* */
+}
+
+static void
+vl_api_nat_det_close_session_out_t_handler (vl_api_nat_det_close_session_out_t
+					    * mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_nat_det_close_session_out_reply_t *rmp;
+  ip4_address_t out_addr, ext_addr, in_addr;
+  snat_det_out_key_t key;
+  snat_det_map_t *m;
+  snat_det_session_t *ses;
+  int rv = 0;
+
+  clib_memcpy (&out_addr, mp->out_addr, 4);
+  clib_memcpy (&ext_addr, mp->ext_addr, 4);
+
+  m = snat_det_map_by_out (&out_addr);
+  if (!m)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+  snat_det_reverse (m, &ext_addr, ntohs (mp->out_port), &in_addr);
+  key.ext_host_addr = ext_addr;
+  key.ext_host_port = mp->ext_port;
+  key.out_port = mp->out_port;
+  ses = snat_det_get_ses_by_out (m, &in_addr, key.as_u64);
+  if (!ses)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+  snat_det_ses_close (m, ses);
+
+send_reply:
+  REPLY_MACRO (VL_API_NAT_DET_CLOSE_SESSION_OUT_REPLY);
+}
+
+static void
+vl_api_nat_det_close_session_in_t_handler (vl_api_nat_det_close_session_in_t *
+					   mp)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_nat_det_close_session_in_reply_t *rmp;
+  ip4_address_t in_addr, ext_addr;
+  snat_det_out_key_t key;
+  snat_det_map_t *m;
+  snat_det_session_t *ses;
+  int rv = 0;
+
+  clib_memcpy (&in_addr, mp->in_addr, 4);
+  clib_memcpy (&ext_addr, mp->ext_addr, 4);
+
+  m = snat_det_map_by_user (&in_addr);
+  if (!m)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+  key.ext_host_addr = ext_addr;
+  key.ext_host_port = mp->ext_port;
+  ses = snat_det_find_ses_by_in (m, &in_addr, mp->in_port, key);
+  if (!ses)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+      goto send_reply;
+    }
+  snat_det_ses_close (m, ses);
+
+send_reply:
+  REPLY_MACRO (VL_API_NAT_DET_CLOSE_SESSION_OUT_REPLY);
+}
+
+static void
+send_nat_det_session_details (snat_det_session_t * s,
+			      vl_api_registration_t * reg, u32 context)
+{
+  det44_main_t *dm = &det44_main;
+  vl_api_nat_det_session_details_t *rmp;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  clib_memset (rmp, 0, sizeof (*rmp));
+  rmp->_vl_msg_id = ntohs (VL_API_NAT_DET_SESSION_DETAILS + dm->msg_id_base);
+  rmp->in_port = s->in_port;
+  clib_memcpy (rmp->ext_addr, &s->out.ext_host_addr, 4);
+  rmp->ext_port = s->out.ext_host_port;
+  rmp->out_port = s->out.out_port;
+  rmp->state = s->state;
+  rmp->expire = ntohl (s->expire);
+  rmp->context = context;
+
+  vl_api_send_msg (reg, (u8 *) rmp);
+}
+
+static void
+vl_api_nat_det_session_dump_t_handler (vl_api_nat_det_session_dump_t * mp)
+{
+  vl_api_registration_t *reg;
+  ip4_address_t user_addr;
+  snat_det_map_t *m;
+  snat_det_session_t *s, empty_ses;
+  u16 i;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  clib_memset (&empty_ses, 0, sizeof (empty_ses));
+  clib_memcpy (&user_addr, mp->user_addr, 4);
+  m = snat_det_map_by_user (&user_addr);
+  if (!m)
+    return;
+
+  s = m->sessions + snat_det_user_ses_offset (&user_addr, m->in_plen);
+  for (i = 0; i < DET44_SES_PER_USER; i++)
+    {
+      if (s->out.as_u64)
+	send_nat_det_session_details (s, reg, mp->context);
+      s++;
+    }
+}
+
+/* API definitions */
+#include <vnet/format_fns.h>
+#include <nat/det44/det44.api.c>
+
+/* Set up the API message handling tables */
+clib_error_t *
+det44_api_hookup (vlib_main_t * vm)
+{
+  det44_main_t *dm = &det44_main;
+  dm->msg_id_base = setup_message_id_table ();
+  return 0;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */