API:support hidden sw interfaces

validate interfaces - added check for hidden interfaces
interface dump - dont send hidden interfaces
set_unnumbered - test for hidden

vl_api_create_vlan_subif_t_handler, vl_api_create_subif_t_handler - fixed potential memory leak

some other minor refactors to make code clearer and shorter

Change-Id: Icce6b724336b7d1536fbd07a74bf7abe4916d2c0
Signed-off-by: Eyal Bari <ebari@cisco.com>

3 files changed, 60 insertions, 86 deletions

diff --git a/src/vlibapi/api_helper_macros.h b/src/vlibapi/api_helper_macros.h
index 7f94e446e18..4e281342db5 100644
--- a/src/vlibapi/api_helper_macros.h
+++ b/src/vlibapi/api_helper_macros.h
@@ -103,11 +103,15 @@ do {                                                            \
 
 /* "trust, but verify" */
 
+static inline uword
+vnet_sw_if_index_is_api_valid (u32 sw_if_index)
+{
+  return vnet_sw_interface_is_api_valid (vnet_get_main (), sw_if_index);
+}
+
 #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)) {                    \
+    if (!vnet_sw_if_index_is_api_valid(__sw_if_index)) {        \
         rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;                \
         goto bad_sw_if_index;                                   \
     }                                                           \
@@ -121,9 +125,7 @@ bad_sw_if_index:                                \
 
 #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)) {			\
+    if (!vnet_sw_if_index_is_api_valid(__rx_sw_if_index)) {     \
         rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;                \
         goto bad_rx_sw_if_index;				\
     }                                                           \
@@ -137,9 +139,7 @@ bad_rx_sw_if_index:				\
 
 #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)) {			\
+    if (!vnet_sw_if_index_is_api_valid(__tx_sw_if_index)) {     \
         rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;                \
         goto bad_tx_sw_if_index;				\
     }                                                           \
diff --git a/src/vnet/interface_api.c b/src/vnet/interface_api.c
index 2b6ff0c590a..28b09b55598 100644
--- a/src/vnet/interface_api.c
+++ b/src/vnet/interface_api.c
@@ -133,14 +133,10 @@ send_sw_interface_details (vpe_api_main_t * am,
 			   vnet_sw_interface_t * swif,
 			   u8 * interface_name, u32 context)
 {
-  vl_api_sw_interface_details_t *mp;
-  vnet_main_t *vnm = vnet_get_main ();
-  vnet_hw_interface_t *hi;
-  u8 *tag;
+  vnet_hw_interface_t *hi =
+    vnet_get_sup_hw_interface (am->vnet_main, swif->sw_if_index);
 
-  hi = vnet_get_sup_hw_interface (am->vnet_main, swif->sw_if_index);
-
-  mp = vl_msg_api_alloc (sizeof (*mp));
+  vl_api_sw_interface_details_t *mp = vl_msg_api_alloc (sizeof (*mp));
   memset (mp, 0, sizeof (*mp));
   mp->_vl_msg_id = ntohs (VL_API_SW_INTERFACE_DETAILS);
   mp->sw_if_index = ntohl (swif->sw_if_index);
@@ -224,7 +220,7 @@ send_sw_interface_details (vpe_api_main_t * am,
       mp->i_sid = i_sid;
     }
 
-  tag = vnet_get_sw_interface_tag (vnm, swif->sw_if_index);
+  u8 *tag = vnet_get_sw_interface_tag (vnet_get_main (), swif->sw_if_index);
   if (tag)
     strncpy ((char *) mp->tag, (char *) tag, ARRAY_LEN (mp->tag) - 1);
 
@@ -237,39 +233,38 @@ vl_api_sw_interface_dump_t_handler (vl_api_sw_interface_dump_t * mp)
   vpe_api_main_t *am = &vpe_api_main;
   vnet_sw_interface_t *swif;
   vnet_interface_main_t *im = &am->vnet_main->interface_main;
-  u8 *filter_string = 0, *name_string = 0;
-  unix_shared_memory_queue_t *q;
-  char *strcasestr (char *, char *);	/* lnx hdr file botch */
-
-  q = vl_api_client_index_to_input_queue (mp->client_index);
 
+  unix_shared_memory_queue_t *q =
+    vl_api_client_index_to_input_queue (mp->client_index);
   if (q == 0)
     return;
 
+  u8 *filter = 0, *name = 0;
   if (mp->name_filter_valid)
     {
       mp->name_filter[ARRAY_LEN (mp->name_filter) - 1] = 0;
-      filter_string = format (0, "%s%c", mp->name_filter, 0);
+      filter = format (0, "%s%c", mp->name_filter, 0);
     }
 
+  char *strcasestr (char *, char *);	/* lnx hdr file botch */
   /* *INDENT-OFF* */
   pool_foreach (swif, im->sw_interfaces,
   ({
-    name_string = format (name_string, "%U%c",
-                          format_vnet_sw_interface_name,
-                          am->vnet_main, swif, 0);
+    if (!vnet_swif_is_api_visible (swif))
+        continue;
+    vec_reset_length(name);
+    name = format (name, "%U%c", format_vnet_sw_interface_name, am->vnet_main,
+                   swif, 0);
 
-    if (mp->name_filter_valid == 0 ||
-        strcasestr((char *) name_string, (char *) filter_string)) {
+    if (filter && !strcasestr((char *) name, (char *) filter))
+	continue;
 
-      send_sw_interface_details (am, q, swif, name_string, mp->context);
-    }
-    _vec_len (name_string) = 0;
+    send_sw_interface_details (am, q, swif, name, mp->context);
   }));
   /* *INDENT-ON* */
 
-  vec_free (name_string);
-  vec_free (filter_string);
+  vec_free (name);
+  vec_free (filter);
 }
 
 static void
@@ -435,49 +430,43 @@ static void vl_api_sw_interface_set_unnumbered_t_handler
 {
   vl_api_sw_interface_set_unnumbered_reply_t *rmp;
   int rv = 0;
-  vnet_sw_interface_t *si;
   vnet_main_t *vnm = vnet_get_main ();
-  u32 sw_if_index, unnumbered_sw_if_index;
-
-  sw_if_index = ntohl (mp->sw_if_index);
-  unnumbered_sw_if_index = ntohl (mp->unnumbered_sw_if_index);
+  u32 sw_if_index = ntohl (mp->sw_if_index);
+  u32 unnumbered_sw_if_index = ntohl (mp->unnumbered_sw_if_index);
 
   /*
    * The API message field names are backwards from
    * the underlying data structure names.
    * It's not worth changing them now.
    */
-  if (pool_is_free_index (vnm->interface_main.sw_interfaces,
-			  unnumbered_sw_if_index))
+  if (!vnet_sw_interface_is_api_valid (vnm, unnumbered_sw_if_index))
     {
       rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;
       goto done;
     }
 
   /* Only check the "use loop0" field when setting the binding */
-  if (mp->is_add &&
-      pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
+  if (mp->is_add && !vnet_sw_interface_is_api_valid (vnm, sw_if_index))
     {
       rv = VNET_API_ERROR_INVALID_SW_IF_INDEX_2;
       goto done;
     }
 
-  si = vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
+  vnet_sw_interface_t *si =
+    vnet_get_sw_interface (vnm, unnumbered_sw_if_index);
 
   if (mp->is_add)
     {
       si->flags |= VNET_SW_INTERFACE_FLAG_UNNUMBERED;
       si->unnumbered_sw_if_index = sw_if_index;
-      ip4_sw_interface_enable_disable (unnumbered_sw_if_index, 1);
-      ip6_sw_interface_enable_disable (unnumbered_sw_if_index, 1);
     }
   else
     {
       si->flags &= ~(VNET_SW_INTERFACE_FLAG_UNNUMBERED);
       si->unnumbered_sw_if_index = (u32) ~ 0;
-      ip4_sw_interface_enable_disable (unnumbered_sw_if_index, 0);
-      ip6_sw_interface_enable_disable (unnumbered_sw_if_index, 0);
     }
+  ip4_sw_interface_enable_disable (unnumbered_sw_if_index, mp->is_add);
+  ip6_sw_interface_enable_disable (unnumbered_sw_if_index, mp->is_add);
 
 done:
   REPLY_MACRO (VL_API_SW_INTERFACE_SET_UNNUMBERED_REPLY);
diff --git a/src/vpp/api/api.c b/src/vpp/api/api.c
index 673ffe5618c..d8301fa69bb 100644
--- a/src/vpp/api/api.c
+++ b/src/vpp/api/api.c
@@ -477,7 +477,6 @@ vl_api_create_vlan_subif_t_handler (vl_api_create_vlan_subif_t * mp)
   uword *p;
   vnet_interface_main_t *im = &vnm->interface_main;
   u64 sup_and_sub_key;
-  u64 *kp;
   unix_shared_memory_queue_t *q;
   clib_error_t *error;
 
@@ -507,9 +506,6 @@ vl_api_create_vlan_subif_t_handler (vl_api_create_vlan_subif_t * mp)
       goto out;
     }
 
-  kp = clib_mem_alloc (sizeof (*kp));
-  *kp = sup_and_sub_key;
-
   memset (&template, 0, sizeof (template));
   template.type = VNET_SW_INTERFACE_TYPE_SUB;
   template.sup_sw_if_index = hi->sw_if_index;
@@ -526,6 +522,10 @@ vl_api_create_vlan_subif_t_handler (vl_api_create_vlan_subif_t * mp)
       rv = VNET_API_ERROR_INVALID_REGISTRATION;
       goto out;
     }
+
+  u64 *kp = clib_mem_alloc (sizeof (*kp));
+  *kp = sup_and_sub_key;
+
   hash_set (hi->sub_interface_sw_if_index_by_id, id, sw_if_index);
   hash_set_mem (im->sw_if_index_by_sup_and_sub, kp, sw_if_index);
 
@@ -537,10 +537,10 @@ out:
     return;
 
   rmp = vl_msg_api_alloc (sizeof (*rmp));
-  rmp->_vl_msg_id = ntohs (VL_API_CREATE_VLAN_SUBIF_REPLY);
+  rmp->_vl_msg_id = htons (VL_API_CREATE_VLAN_SUBIF_REPLY);
   rmp->context = mp->context;
-  rmp->retval = ntohl (rv);
-  rmp->sw_if_index = ntohl (sw_if_index);
+  rmp->retval = htonl (rv);
+  rmp->sw_if_index = htonl (sw_if_index);
   vl_msg_api_send_shmem (q, (u8 *) & rmp);
 }
 
@@ -558,7 +558,6 @@ vl_api_create_subif_t_handler (vl_api_create_subif_t * mp)
   uword *p;
   vnet_interface_main_t *im = &vnm->interface_main;
   u64 sup_and_sub_key;
-  u64 *kp;
   clib_error_t *error;
 
   VALIDATE_SW_IF_INDEX (mp);
@@ -587,9 +586,6 @@ vl_api_create_subif_t_handler (vl_api_create_subif_t * mp)
       goto out;
     }
 
-  kp = clib_mem_alloc (sizeof (*kp));
-  *kp = sup_and_sub_key;
-
   memset (&template, 0, sizeof (template));
   template.type = VNET_SW_INTERFACE_TYPE_SUB;
   template.sup_sw_if_index = sw_if_index;
@@ -613,6 +609,9 @@ vl_api_create_subif_t_handler (vl_api_create_subif_t * mp)
       goto out;
     }
 
+  u64 *kp = clib_mem_alloc (sizeof (*kp));
+  *kp = sup_and_sub_key;
+
   hash_set (hi->sub_interface_sw_if_index_by_id, sub_id, sw_if_index);
   hash_set_mem (im->sw_if_index_by_sup_and_sub, kp, sw_if_index);
 
@@ -669,20 +668,11 @@ static void
   int rv = 0;
   vnet_main_t *vnm = vnet_get_main ();
   vl_api_proxy_arp_intfc_enable_disable_reply_t *rmp;
-  vnet_sw_interface_t *si;
-  u32 sw_if_index;
 
   VALIDATE_SW_IF_INDEX (mp);
 
-  sw_if_index = ntohl (mp->sw_if_index);
-
-  if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
-    {
-      rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;
-      goto out;
-    }
-
-  si = vnet_get_sw_interface (vnm, sw_if_index);
+  vnet_sw_interface_t *si =
+    vnet_get_sw_interface (vnm, ntohl (mp->sw_if_index));
 
   ASSERT (si);
 
@@ -1223,13 +1213,12 @@ static void vl_api_classify_set_interface_ip_table_t_handler
   vlib_main_t *vm = vlib_get_main ();
   vl_api_classify_set_interface_ip_table_reply_t *rmp;
   int rv;
-  u32 table_index, sw_if_index;
-
-  table_index = ntohl (mp->table_index);
-  sw_if_index = ntohl (mp->sw_if_index);
 
   VALIDATE_SW_IF_INDEX (mp);
 
+  u32 table_index = ntohl (mp->table_index);
+  u32 sw_if_index = ntohl (mp->sw_if_index);
+
   if (mp->is_ipv6)
     rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
   else
@@ -1658,15 +1647,14 @@ static void vl_api_input_acl_set_interface_t_handler
   vlib_main_t *vm = vlib_get_main ();
   vl_api_input_acl_set_interface_reply_t *rmp;
   int rv;
-  u32 sw_if_index, ip4_table_index, ip6_table_index, l2_table_index;
-
-  ip4_table_index = ntohl (mp->ip4_table_index);
-  ip6_table_index = ntohl (mp->ip6_table_index);
-  l2_table_index = ntohl (mp->l2_table_index);
-  sw_if_index = ntohl (mp->sw_if_index);
 
   VALIDATE_SW_IF_INDEX (mp);
 
+  u32 ip4_table_index = ntohl (mp->ip4_table_index);
+  u32 ip6_table_index = ntohl (mp->ip6_table_index);
+  u32 l2_table_index = ntohl (mp->l2_table_index);
+  u32 sw_if_index = ntohl (mp->sw_if_index);
+
   rv = vnet_set_input_acl_intfc (vm, sw_if_index, ip4_table_index,
 				 ip6_table_index, l2_table_index, mp->is_add);
 
@@ -2013,25 +2001,22 @@ vl_api_feature_enable_disable_t_handler (vl_api_feature_enable_disable_t * mp)
 {
   vl_api_feature_enable_disable_reply_t *rmp;
   int rv = 0;
-  u8 *arc_name, *feature_name;
 
   VALIDATE_SW_IF_INDEX (mp);
 
-  arc_name = format (0, "%s%c", mp->arc_name, 0);
-  feature_name = format (0, "%s%c", mp->feature_name, 0);
+  u8 *arc_name = format (0, "%s%c", mp->arc_name, 0);
+  u8 *feature_name = format (0, "%s%c", mp->feature_name, 0);
 
-  vnet_feature_registration_t *reg;
-  reg =
+  vnet_feature_registration_t *reg =
     vnet_get_feature_reg ((const char *) arc_name,
 			  (const char *) feature_name);
   if (reg == 0)
     rv = VNET_API_ERROR_INVALID_VALUE;
   else
     {
-      u32 sw_if_index;
+      u32 sw_if_index = ntohl (mp->sw_if_index);
       clib_error_t *error = 0;
 
-      sw_if_index = ntohl (mp->sw_if_index);
       if (reg->enable_disable_cb)
 	error = reg->enable_disable_cb (sw_if_index, mp->enable);
       if (!error)