3 files changed, 153 insertions, 3 deletions

diff --git a/src/plugins/snat/snat.api b/src/plugins/snat/snat.api
index 5990eae5a24..e92675de867 100644
--- a/src/plugins/snat/snat.api
+++ b/src/plugins/snat/snat.api
@@ -565,3 +565,38 @@ autoreply define snat_det_close_session_in {
   u8 ext_addr[16];
   u16 ext_port;
 };
+
+/** \brief Dump S-NAT deterministic sessions
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param is_ip4 - 1 if address type is IPv4
+    @param user_addr - address of an inside user whose sessions to dump
+*/
+define snat_det_session_dump {
+  u32 client_index;
+  u32 context;
+  u8 is_ip4;
+  u8 user_addr[16];
+};
+
+/** \brief S-NAT deterministic sessions reply
+    @param context - sender context, to match reply w/ request
+    @param is_ip4 - 1 if address type is IPv4
+    @param in_port - inside port
+    @param ext_addr - external host address
+    @param ext_port - external host port
+    @param out_port - outside NAT port
+    @param state - session state
+    @param expire - session expiration timestamp
+*/
+define snat_det_session_details {
+  u32 client_index;
+  u32 context;
+  u8 is_ip4;
+  u16 in_port;
+  u8 ext_addr[16];
+  u16 ext_port;
+  u16 out_port;
+  u8 state;
+  u32 expire;
+};
diff --git a/src/plugins/snat/snat.c b/src/plugins/snat/snat.c
index 594afa62c80..c6783e47b6d 100644
--- a/src/plugins/snat/snat.c
+++ b/src/plugins/snat/snat.c
@@ -1811,6 +1811,72 @@ static void *vl_api_snat_det_close_session_in_t_print
   FINISH;
 }
 
+static void
+send_snat_det_session_details
+(snat_det_session_t * s, unix_shared_memory_queue_t * q, u32 context)
+{
+  vl_api_snat_det_session_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_DET_SESSION_DETAILS+sm->msg_id_base);
+  rmp->is_ip4 = 1;
+  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_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_snat_det_session_dump_t_handler
+(vl_api_snat_det_session_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+  snat_main_t * sm = &snat_main;
+  ip4_address_t user_addr;
+  snat_det_map_t * dm;
+  snat_det_session_t * s, empty_ses;
+  u16 i;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    return;
+  if (!mp->is_ip4)
+    return;
+
+  memset (&empty_ses, 0, sizeof (empty_ses));
+  clib_memcpy (&user_addr, mp->user_addr, 4);
+  dm = snat_det_map_by_user (sm, &user_addr);
+  if (!dm)
+    return;
+
+  s = dm->sessions + snat_det_user_ses_offset (&user_addr, dm->in_plen);
+  for (i = 0; i < SNAT_DET_SES_PER_USER; i++)
+    {
+      if (s->out.as_u64)
+        send_snat_det_session_details (s, q, mp->context);
+      s++;
+    }
+}
+
+static void *vl_api_snat_det_session_dump_t_print
+(vl_api_snat_det_session_dump_t * mp, void * handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: snat_det_session_dump ");
+  s = format (s, "user_addr %U\n",
+              format_ip4_address, mp->user_addr);
+
+  FINISH;
+}
+
 /* List of message types that this plugin understands */
 #define foreach_snat_plugin_api_msg                                     \
 _(SNAT_ADD_ADDRESS_RANGE, snat_add_address_range)                       \
@@ -1835,7 +1901,8 @@ _(SNAT_DET_MAP_DUMP, snat_det_map_dump)                                 \
 _(SNAT_DET_SET_TIMEOUTS, snat_det_set_timeouts)                         \
 _(SNAT_DET_GET_TIMEOUTS, snat_det_get_timeouts)                         \
 _(SNAT_DET_CLOSE_SESSION_OUT, snat_det_close_session_out)               \
-_(SNAT_DET_CLOSE_SESSION_IN, snat_det_close_session_in)
+_(SNAT_DET_CLOSE_SESSION_IN, snat_det_close_session_in)                 \
+_(SNAT_DET_SESSION_DUMP, snat_det_session_dump)
 
 
 /* Set up the API message handling tables */
diff --git a/src/plugins/snat/snat_test.c b/src/plugins/snat/snat_test.c
index 14e8d1990b7..905b8fac66c 100644
--- a/src/plugins/snat/snat_test.c
+++ b/src/plugins/snat/snat_test.c
@@ -121,7 +121,8 @@ _(SNAT_DET_GET_TIMEOUTS_REPLY, snat_det_get_timeouts_reply)     \
 _(SNAT_DET_CLOSE_SESSION_OUT_REPLY,                             \
   snat_det_close_session_out_reply)                             \
 _(SNAT_DET_CLOSE_SESSION_IN_REPLY,                              \
-  snat_det_close_session_in_reply)
+  snat_det_close_session_in_reply)                              \
+_(SNAT_DET_SESSION_DETAILS, snat_det_session_details)
 
 static int api_snat_add_address_range (vat_main_t * vam)
 {
@@ -1033,6 +1034,52 @@ static int api_snat_det_close_session_in (vat_main_t * vam)
   return ret;
 }
 
+static void vl_api_snat_det_session_details_t_handler
+  (vl_api_snat_det_session_details_t *mp)
+{
+  snat_test_main_t * sm = &snat_test_main;
+  vat_main_t *vam = sm->vat_main;
+
+  fformat(vam->ofp, "deterministic session, external host address %U, "
+                    "external host port %d, outer port %d, inside port %d",
+          format_ip4_address, mp->ext_addr, mp->ext_port,
+          mp->out_port, mp->in_port);
+}
+
+static int api_snat_det_session_dump(vat_main_t * vam)
+{
+  unformat_input_t* i = vam->input;
+  vl_api_snat_det_session_dump_t * mp;
+  vl_api_snat_control_ping_t *mp_ping;
+  ip4_address_t user_addr;
+  int ret;
+
+  if (vam->json_output)
+    {
+      clib_warning ("JSON output not supported for snat_det_session_dump");
+      return -99;
+    }
+
+  if (unformat (i, "user_addr %U", unformat_ip4_address, &user_addr))
+    ;
+  else
+    {
+      clib_warning ("unknown input '%U'", format_unformat_error, i);
+      return -99;
+    }
+
+  M(SNAT_DET_SESSION_DUMP, mp);
+  clib_memcpy (&mp->user_addr, &user_addr, 4);
+  S(mp);
+
+  /* Use a control ping for synchronization */
+  M(SNAT_CONTROL_PING, mp_ping);
+  S(mp_ping);
+
+  W (ret);
+  return ret;
+}
+
 /* 
  * List of messages that the api test plugin sends,
  * and that the data plane plugin processes
@@ -1069,7 +1116,8 @@ _(snat_det_get_timeouts, "")                                     \
 _(snat_det_close_session_out, "<out_addr>:<out_port> "           \
   "<ext_addr>:<ext_port>")                                       \
 _(snat_det_close_session_in, "<in_addr>:<in_port> "              \
-  "<out_addr>:<out_port>")
+  "<out_addr>:<out_port>")                                       \
+_(snat_det_session_dump, "ip_address <user_addr>")
 
 static void 
 snat_vat_api_hookup (vat_main_t *vam)