add mactime plugin unit / code coverage tests

The unit and code coverage tests are boring. The rest of the patch
involves test and packet-generator infra cleanups.

Teach the "make test-xxx" family of targets to set the api test plugin
path correctly, to make "binary-api <api-message-name> <args>" debug
CLI commands work correctly in the "make test"
environment. Unfortunately involves both the top-level and test
Makefiles.

Add a minor pg cli feature, a CLI to manually set
s->sw_if_index[VLIB_TX].

Consider the case where one configures an interface with both a
device-input and an output feature. To test the output feature using
the pg, it's necessary to inject packets into the interface output
node with both b->sw_if_index[VLIB_TX] and b->sw_if_index[VLIB_RX] set
correctly. For example:

packet-generator new {
 name tx
 limit 15
 size 128-128
 interface local0  # rx: device input feature not configured on local0
 tx-interface loop0 # tx: output node requires b->sw_if_index[VLIB_TX]
 node loop0-output
 data {
   hex 0x01005e7ffffa000dead0000008000102030405060708090a0b0c0d0e0f0102030405
   }
}

Fix a longstanding bug in the packet generator stream setup.  Remove
kludges which set b->sw_if_index[VLIB_TX] to ~0 [in multiple places]
instead of using the stream value s->sw_if_index[VLIB_TX], and setting
THAT datum correctly.

Change-Id: I1097a18e8db73661ded6b822c1d718f7e5cf36ed
Signed-off-by: Dave Barach <dave@barachs.net>

1 files changed, 2 insertions, 5 deletions

diff --git a/src/plugins/mactime/mactime.c b/src/plugins/mactime/mactime.c
index 6cbddbc7a44..1b053faa2e8 100644
--- a/src/plugins/mactime/mactime.c
+++ b/src/plugins/mactime/mactime.c
@@ -126,6 +126,8 @@ mactime_enable_disable_command_fn (vlib_main_t * vm,
       else if (unformat (input, "%U", unformat_vnet_sw_interface,
 			 mm->vnet_main, &sw_if_index))
 	;
+      else if (unformat (input, "sw_if_index %d", &sw_if_index))
+	;
       else
 	break;
     }
@@ -145,11 +147,6 @@ mactime_enable_disable_command_fn (vlib_main_t * vm,
 	(0, "Invalid interface, only works on physical ports");
       break;
 
-    case VNET_API_ERROR_UNIMPLEMENTED:
-      return clib_error_return (0,
-				"Device driver doesn't support redirection");
-      break;
-
     default:
       return clib_error_return (0, "mactime_enable_disable returned %d", rv);
     }