api: verify message size on receipt
When a message is received, verify that it's sufficiently large to
accomodate any VLAs within message. To do that, we need a way to
calculate message size including any VLAs. This patch adds such
funcionality to vppapigen and necessary C code to use those to validate
message size on receipt. Drop messages which are malformed.
Type: improvement
Signed-off-by: Klement Sekera <ksekera@cisco.com>
Change-Id: I2903aa21dee84be6822b064795ba314de46c18f4
diff --git a/src/vat/api_format.c b/src/vat/api_format.c
index a759ba2..4827d55 100644
--- a/src/vat/api_format.c
+++ b/src/vat/api_format.c
@@ -64,6 +64,10 @@
#include <vlibmemory/memclnt.api.h>
#undef vl_endianfun
+#define vl_calcsizefun
+#include <vlibmemory/memclnt.api.h>
+#undef vl_calcsizefun
+
/* instantiate all the print functions we know about */
#if VPP_API_TEST_BUILTIN == 0
#define vl_print(handle, ...)
@@ -2737,11 +2741,11 @@
vat_api_hookup (vat_main_t * vam)
{
#define _(N, n) \
- vl_msg_api_set_handlers (VL_API_##N + 1, #n, vl_api_##n##_t_handler_uni, \
- vl_noop_handler, vl_api_##n##_t_endian, \
- vl_api_##n##_t_print, sizeof (vl_api_##n##_t), 1, \
- vl_api_##n##_t_print_json, vl_api_##n##_t_tojson, \
- vl_api_##n##_t_fromjson);
+ vl_msg_api_set_handlers ( \
+ VL_API_##N + 1, #n, vl_api_##n##_t_handler_uni, vl_noop_handler, \
+ vl_api_##n##_t_endian, vl_api_##n##_t_print, sizeof (vl_api_##n##_t), 1, \
+ vl_api_##n##_t_print_json, vl_api_##n##_t_tojson, \
+ vl_api_##n##_t_fromjson, vl_api_##n##_t_calc_size);
foreach_vpe_api_reply_msg;
#if VPP_API_TEST_BUILTIN == 0
foreach_standalone_reply_msg;