Add client-side msg_name_and_crc -> msg_index table

vppapigen now generates per-message crcs. Verified that whitespace
and real changes in message A don't change the crc for message B, etc.

Fixed the sample and flowperpkt plugins to participate. Others need
the same treatment. They don't build due to python/java language binding
build issues.

To use the scheme:

Client connects as usual.

Then call: u32 vl_api_get_msg_index(char * name_and_crc)
name_and_crc is a string like: "flowperpkt_tx_interface_add_del_753301f3",
aka the message name with _%08x <expected crc> appended.

Try these vpp-api-test commands to play with it:

vat# dump_msg_api_table
     <snip>
 [366]: punt_reply_cca27fbe
 [367]: ipsec_spd_dump_5e9ae88e
 [368]: ipsec_spd_details_6f7821b0
 [369]: sample_macswap_enable_disable_0f2813e2
 [370]: sample_macswap_enable_disable_reply_476738e5
 [371]: flowperpkt_tx_interface_add_del_753301f3
 [372]: flowperpkt_tx_interface_add_del_reply_d47e6e0b

vat# get_msg_id sample_macswap_enable_disable_reply_476738e5
 'sample_macswap_enable_disable_reply_476738e5' has message index 370

vat# get_msg_id sample_macswap_enable_disable_reply_476738e3
 'sample_macswap_enable_disable_reply_476738e3' not found

CRCs may vary, etc.

vppapigen is used to build a set of JSON representations
of each API file from vpp-api/Makefile.am and that is in
turn used by each language binding (Java, Python, Lua).

Change-Id: I3d64582e779dac5f20cddec79c562c288d8fd9c6
Signed-off-by: Dave Barach <dave@barachs.net>
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/plugins/sample-plugin/sample/sample.c b/plugins/sample-plugin/sample/sample.c
index 321b66c0..603cb2d0 100644
--- a/plugins/sample-plugin/sample/sample.c
+++ b/plugins/sample-plugin/sample/sample.c
@@ -210,6 +210,19 @@ sample_plugin_api_hookup (vlib_main_t *vm)
     return 0;
 }
 
+#define vl_msg_name_crc_list
+#include <sample/sample_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+static void 
+setup_message_id_table (sample_main_t * sm, api_main_t *am)
+{
+#define _(id,n,crc) \
+  vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id + sm->msg_id_base);
+  foreach_vl_msg_name_crc_sample;
+#undef _
+}
+
 static clib_error_t * sample_init (vlib_main_t * vm)
 {
   sample_main_t * sm = &sample_main;
@@ -224,6 +237,9 @@ static clib_error_t * sample_init (vlib_main_t * vm)
 
   error = sample_plugin_api_hookup (vm);
 
+  /* Add our API messages to the global name_crc hash table */
+  setup_message_id_table (sm, &api_main);
+
   vec_free(name);
 
   return error;