ipsec: fix instance, and cli del for new ipsec interface

- use user instance number in interface name

Restore the behavior of previous versions where the IPsec tunnel
interface name contained the value of the user-provided instance number.
For example, a command similar to

	create ipsec tunnel local-ip . . . instance 5

would result in the creation of interface "ipsec5".

- ipsec: delete tunnel protection when asked

The "ipsec tunnel protect" command will parse a "del" argument but does
not undo the tunnel protection, leaving the SAs hanging around with
reference counts that were incremented by a previous invocation of the
command. Allow the tunnel protection to be deleted and also update the
help text to indicate that deletion is an option.

- test: ipsec: add test for ipsec interface instance

Also cleanup (unconfig) after TestIpsecItf4 NULL algo test.

Type: fix
Fixes: dd4ccf2623b5 ("ipsec: Dedicated IPSec interface type")
Signed-off-by: Eric Kinzie <ekinzie@labn.net>
Signed-off-by: Christian Hopps <chopps@labn.net>
Change-Id: Idb59ceafa0633040344473c9942b6536e3d941ce

2 files changed, 4 insertions, 4 deletions

diff --git a/src/vnet/ipsec/ipsec_cli.c b/src/vnet/ipsec/ipsec_cli.c
index 937e0f6b2e4..7d265f7e64d 100644
--- a/src/vnet/ipsec/ipsec_cli.c
+++ b/src/vnet/ipsec/ipsec_cli.c
@@ -997,6 +997,8 @@ ipsec_tun_protect_cmd (vlib_main_t * vm,
 
   if (!is_del)
     ipsec_tun_protect_update (sw_if_index, &peer, sa_out, sa_ins);
+  else
+    ipsec_tun_protect_del (sw_if_index, &peer);
 
   unformat_free (line_input);
   return NULL;
@@ -1010,7 +1012,7 @@ VLIB_CLI_COMMAND (ipsec_tun_protect_cmd_node, static) =
 {
   .path = "ipsec tunnel protect",
   .function = ipsec_tun_protect_cmd,
-  .short_help = "ipsec tunnel protect <interface> input-sa <SA> output-sa <SA>",
+  .short_help = "ipsec tunnel protect <interface> input-sa <SA> output-sa <SA> [add|del]",
     // this is not MP safe
 };
 /* *INDENT-ON* */
diff --git a/src/vnet/ipsec/ipsec_itf.c b/src/vnet/ipsec/ipsec_itf.c
index 756bc19fbef..6724eab73a8 100644
--- a/src/vnet/ipsec/ipsec_itf.c
+++ b/src/vnet/ipsec/ipsec_itf.c
@@ -294,12 +294,10 @@ ipsec_itf_create (u32 user_instance, tunnel_mode_t mode, u32 * sw_if_indexp)
 
   ipsec_itf->ii_mode = mode;
   ipsec_itf->ii_user_instance = instance;
-  if (~0 == ipsec_itf->ii_user_instance)
-    ipsec_itf->ii_user_instance = t_idx;
 
   hw_if_index = vnet_register_interface (vnm,
 					 ipsec_itf_device_class.index,
-					 t_idx,
+					 ipsec_itf->ii_user_instance,
 					 ipsec_hw_interface_class.index,
 					 t_idx);