l2fib: MAC: Fix uint64 to u8 byte array

As per proposal on the mailing list, this patch fixes
the represntation of MAC address in VPP API calls for
   ·  L2fib_add_del
   ·  L2_fib_table_details

Change-Id: I31e17efd1a6314cded69666e693cb8fc33158d02
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>

5 files changed, 44 insertions, 49 deletions

diff --git a/src/vnet/l2/l2.api b/src/vnet/l2/l2.api
index 18383652827..404a47888d8 100644
--- a/src/vnet/l2/l2.api
+++ b/src/vnet/l2/l2.api
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-vl_api_version 1.0.0
+vl_api_version 2.0.0
 
 /** \brief Reply to l2_xconnect_dump 
     @param context - sender context which was passed in the request
@@ -50,7 +50,7 @@ define l2_fib_table_details
 {
   u32 context;
   u32 bd_id;
-  u64 mac;
+  u8 mac[6];
   u32 sw_if_index;
   u8 static_mac;
   u8 filter_mac;
@@ -126,7 +126,7 @@ autoreply define l2fib_add_del
 {
   u32 client_index;
   u32 context;
-  u64 mac;
+  u8 mac[6];
   u32 bd_id;
   u32 sw_if_index;
   u8 is_add;
diff --git a/src/vnet/l2/l2_api.c b/src/vnet/l2/l2_api.c
index 20d6ab32fad..8fd94b0e40a 100644
--- a/src/vnet/l2/l2_api.c
+++ b/src/vnet/l2/l2_api.c
@@ -133,7 +133,7 @@ send_l2fib_table_entry (vpe_api_main_t * am,
   mp->bd_id =
     ntohl (l2input_main.bd_configs[l2fe_key->fields.bd_index].bd_id);
 
-  mp->mac = l2fib_make_key (l2fe_key->fields.mac, 0);
+  clib_memcpy (mp->mac, l2fe_key->fields.mac, 6);
   mp->sw_if_index = ntohl (l2fe_res->fields.sw_if_index);
   mp->static_mac = l2fe_res->fields.static_mac;
   mp->filter_mac = l2fe_res->fields.filter;
@@ -199,7 +199,9 @@ vl_api_l2fib_add_del_t_handler (vl_api_l2fib_add_del_t * mp)
     }
   u32 bd_index = p[0];
 
-  u64 mac = mp->mac;
+  u8 mac[6];
+
+  clib_memcpy (mac, mp->mac, 6);
   if (mp->is_add)
     {
       if (mp->filter_mac)
diff --git a/src/vnet/l2/l2_fib.c b/src/vnet/l2/l2_fib.c
index 0ad56f38fe0..9e095d236cf 100644
--- a/src/vnet/l2/l2_fib.c
+++ b/src/vnet/l2/l2_fib.c
@@ -54,6 +54,17 @@
 
 l2fib_main_t l2fib_main;
 
+static void
+incr_mac_address (u8 * mac)
+{
+  u64 tmp = *((u64 *) mac);
+  tmp = clib_net_to_host_u64 (tmp);
+  tmp += 1 << 16;		/* skip unused (least significant) octets */
+  tmp = clib_host_to_net_u64 (tmp);
+
+  clib_memcpy (mac, &tmp, 6);
+}
+
 /** Format sw_if_index. If the value is ~0, use the text "N/A" */
 u8 *
 format_vnet_sw_if_index_name_with_NA (u8 * s, va_list * args)
@@ -342,7 +353,7 @@ l2fib_cur_seq_num (u32 bd_index, u32 sw_if_index)
  * If the entry already exists then overwrite it
  */
 void
-l2fib_add_entry (u64 mac, u32 bd_index,
+l2fib_add_entry (u8 * mac, u32 bd_index,
 		 u32 sw_if_index, u8 static_mac, u8 filter_mac, u8 bvi_mac)
 {
   l2fib_entry_key_t key;
@@ -353,7 +364,7 @@ l2fib_add_entry (u64 mac, u32 bd_index,
   BVT (clib_bihash_kv) kv;
 
   /* set up key */
-  key.raw = l2fib_make_key ((u8 *) & mac, bd_index);
+  key.raw = l2fib_make_key (mac, bd_index);
 
   /* check if entry alread exist */
   if (BV (clib_bihash_search) (&fm->mac_table, &kv, &kv))
@@ -392,7 +403,7 @@ l2fib_add (vlib_main_t * vm,
   bd_main_t *bdm = &bd_main;
   vnet_main_t *vnm = vnet_get_main ();
   clib_error_t *error = 0;
-  u64 mac;
+  u8 mac[6];
   u32 bd_id;
   u32 bd_index;
   u32 sw_if_index = ~0;
@@ -401,7 +412,7 @@ l2fib_add (vlib_main_t * vm,
   u32 bvi_mac = 0;
   uword *p;
 
-  if (!unformat_user (input, unformat_ethernet_address, &mac))
+  if (!unformat (input, "%U", unformat_ethernet_address, mac))
     {
       error = clib_error_return (0, "expected mac address `%U'",
 				 format_unformat_error, input);
@@ -507,7 +518,7 @@ l2fib_test_command_fn (vlib_main_t * vm,
 		       unformat_input_t * input, vlib_cli_command_t * cmd)
 {
   clib_error_t *error = 0;
-  u64 mac, save_mac;
+  u8 mac[6], save_mac[6];
   u32 bd_index = 0;
   u32 sw_if_index = 8;
   u32 bvi_mac = 0;
@@ -520,7 +531,7 @@ l2fib_test_command_fn (vlib_main_t * vm,
 
   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
     {
-      if (unformat (input, "mac %U", unformat_ethernet_address, &mac))
+      if (unformat (input, "mac %U", unformat_ethernet_address, mac))
 	mac_set = 1;
       else if (unformat (input, "add"))
 	is_add = 1;
@@ -541,19 +552,14 @@ l2fib_test_command_fn (vlib_main_t * vm,
     return clib_error_return (0,
 			      "noop: pick at least one of (add,del,check)");
 
-  save_mac = mac;
+  clib_memcpy (save_mac, mac, 6);
 
   if (is_add)
     {
       for (i = 0; i < count; i++)
 	{
-	  u64 tmp;
-	  l2fib_add_fwd_entry (mac, bd_index, sw_if_index, mac, bvi_mac);
-	  tmp = clib_net_to_host_u64 (mac);
-	  tmp >>= 16;
-	  tmp++;
-	  tmp <<= 16;
-	  mac = clib_host_to_net_u64 (tmp);
+	  l2fib_add_fwd_entry (mac, bd_index, sw_if_index, *mac, bvi_mac);
+	  incr_mac_address (mac);
 	}
     }
 
@@ -562,38 +568,28 @@ l2fib_test_command_fn (vlib_main_t * vm,
       BVT (clib_bihash_kv) kv;
       l2fib_main_t *mp = &l2fib_main;
 
-      mac = save_mac;
+      clib_memcpy (mac, save_mac, 6);
 
       for (i = 0; i < count; i++)
 	{
-	  u64 tmp;
-	  kv.key = l2fib_make_key ((u8 *) & mac, bd_index);
+	  kv.key = l2fib_make_key (mac, bd_index);
 	  if (BV (clib_bihash_search) (&mp->mac_table, &kv, &kv))
 	    {
-	      clib_warning ("key %U AWOL", format_ethernet_address, &mac);
+	      clib_warning ("key %U AWOL", format_ethernet_address, mac);
 	      break;
 	    }
-	  tmp = clib_net_to_host_u64 (mac);
-	  tmp >>= 16;
-	  tmp++;
-	  tmp <<= 16;
-	  mac = clib_host_to_net_u64 (tmp);
+	  incr_mac_address (mac);
 	}
     }
 
   if (is_del)
     {
+      clib_memcpy (mac, save_mac, 6);
+
       for (i = 0; i < count; i++)
 	{
-	  u64 tmp;
-
 	  l2fib_del_entry (mac, bd_index);
-
-	  tmp = clib_net_to_host_u64 (mac);
-	  tmp >>= 16;
-	  tmp++;
-	  tmp <<= 16;
-	  mac = clib_host_to_net_u64 (tmp);
+	  incr_mac_address (mac);
 	}
     }
 
@@ -680,9 +676,9 @@ l2fib_del_entry_by_key (u64 raw_key)
  * Return 0 if the entry was deleted, or 1 if it was not found
  */
 u32
-l2fib_del_entry (u64 mac, u32 bd_index)
+l2fib_del_entry (u8 * mac, u32 bd_index)
 {
-  return l2fib_del_entry_by_key (l2fib_make_key ((u8 *) & mac, bd_index));
+  return l2fib_del_entry_by_key (l2fib_make_key (mac, bd_index));
 }
 
 /**
@@ -696,12 +692,12 @@ l2fib_del (vlib_main_t * vm,
 {
   bd_main_t *bdm = &bd_main;
   clib_error_t *error = 0;
-  u64 mac;
+  u8 mac[6];
   u32 bd_id;
   u32 bd_index;
   uword *p;
 
-  if (!unformat_user (input, unformat_ethernet_address, &mac))
+  if (!unformat (input, "%U", unformat_ethernet_address, mac))
     {
       error = clib_error_return (0, "expected mac address `%U'",
 				 format_unformat_error, input);
diff --git a/src/vnet/l2/l2_fib.h b/src/vnet/l2/l2_fib.h
index 7cc2dc5e15e..6346826ee99 100644
--- a/src/vnet/l2/l2_fib.h
+++ b/src/vnet/l2/l2_fib.h
@@ -371,24 +371,24 @@ l2fib_lookup_4 (BVT (clib_bihash) * mac_table,
 void l2fib_clear_table (void);
 
 void
-l2fib_add_entry (u64 mac,
+l2fib_add_entry (u8 * mac,
 		 u32 bd_index,
 		 u32 sw_if_index, u8 static_mac, u8 drop_mac, u8 bvi_mac);
 
 static inline void
-l2fib_add_fwd_entry (u64 mac, u32 bd_index, u32 sw_if_index, u8 static_mac,
+l2fib_add_fwd_entry (u8 * mac, u32 bd_index, u32 sw_if_index, u8 static_mac,
 		     u8 bvi_mac)
 {
   l2fib_add_entry (mac, bd_index, sw_if_index, static_mac, 0, bvi_mac);
 }
 
 static inline void
-l2fib_add_filter_entry (u64 mac, u32 bd_index)
+l2fib_add_filter_entry (u8 * mac, u32 bd_index)
 {
   l2fib_add_entry (mac, bd_index, ~0, 1, 1, 0);
 }
 
-u32 l2fib_del_entry (u64 mac, u32 bd_index);
+u32 l2fib_del_entry (u8 * mac, u32 bd_index);
 
 void l2fib_start_ager_scan (vlib_main_t * vm);
 
diff --git a/src/vnet/l2/l2_input.c b/src/vnet/l2/l2_input.c
index e556b141b3b..f60dd189e0a 100644
--- a/src/vnet/l2/l2_input.c
+++ b/src/vnet/l2/l2_input.c
@@ -550,7 +550,6 @@ set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main,	/*           */
   l2_output_config_t *out_config;
   l2_input_config_t *config;
   l2_bridge_domain_t *bd_config;
-  u64 mac;
   i32 l2_if_adjust = 0;
   u32 slot;
 
@@ -572,8 +571,7 @@ set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main,	/*           */
 	  config->bvi = 0;
 
 	  /* delete the l2fib entry for the bvi interface */
-	  mac = *((u64 *) hi->hw_address);
-	  l2fib_del_entry (mac, config->bd_index);
+	  l2fib_del_entry (hi->hw_address, config->bd_index);
 
 	  /* Make loop output node send packet back to ethernet-input node */
 	  slot =
@@ -672,8 +670,7 @@ set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main,	/*           */
 	      config->bvi = 1;
 
 	      /* create the l2fib entry for the bvi interface */
-	      mac = *((u64 *) hi->hw_address);
-	      l2fib_add_fwd_entry (mac, bd_index, sw_if_index, 1, 1);	/* static + bvi */
+	      l2fib_add_fwd_entry (hi->hw_address, bd_index, sw_if_index, 1, 1);	/* static + bvi */
 
 	      /* Disable learning by default. no use since l2fib entry is static. */
 	      config->feature_bitmap &= ~L2INPUT_FEAT_LEARN;