interface: callback to manage extra MAC addresses

Type: feature

New callback vnet_hw_interface_add_del_mac_address().

Add or delete secondary MAC addresses on a hardware interface.
This will allow packets to be processed which have a destination
MAC address other than the primary programmed MAC address without
needing to put the device into promiscuous mode.

Change-Id: I6beecbcb8932fc1fe45b567f76fa3706feefae2c
Signed-off-by: Matthew Smith <mgsmith@netgate.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/src/vnet/interface.c b/src/vnet/interface.c
index 0f6b8aeab07..0b4d78afbde 100644
--- a/src/vnet/interface.c
+++ b/src/vnet/interface.c
@@ -1427,6 +1427,48 @@ vnet_rename_interface (vnet_main_t * vnm, u32 hw_if_index, char *new_name)
   return error;
 }
 
+clib_error_t *
+vnet_hw_interface_add_del_mac_address (vnet_main_t * vnm,
+				       u32 hw_if_index,
+				       const u8 * mac_address, u8 is_add)
+{
+  clib_error_t *error = 0;
+  vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
+
+  vnet_device_class_t *dev_class =
+    vnet_get_device_class (vnm, hi->dev_class_index);
+
+  if (!hi->hw_address)
+    {
+      error =
+	clib_error_return
+	(0, "Secondary MAC Addresses not supported for interface index %u",
+	 hw_if_index);
+      goto done;
+    }
+
+  if (dev_class->mac_addr_add_del_function)
+    error = dev_class->mac_addr_add_del_function (hi, mac_address, is_add);
+
+  if (!error)
+    {
+      vnet_hw_interface_class_t *hw_class;
+
+      hw_class = vnet_get_hw_interface_class (vnm, hi->hw_class_index);
+
+      if (NULL != hw_class->mac_addr_add_del_function)
+	error = hw_class->mac_addr_add_del_function (hi, mac_address, is_add);
+    }
+
+  /* If no errors, add to the list of secondary MACs on the ethernet intf */
+  if (!error)
+    ethernet_interface_add_del_address (&ethernet_main, hw_if_index,
+					mac_address, is_add);
+
+done:
+  return error;
+}
+
 static clib_error_t *
 vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
 					     u32 hw_if_index,