summaryrefslogtreecommitdiffstats
path: root/src/vat/api_format.c
diff options
context:
space:
mode:
authorKlement Sekera <ksekera@cisco.com>2021-11-22 21:26:20 +0100
committerOle Tr�an <otroan@employees.org>2021-12-14 09:15:48 +0000
commit9b7e8acf792cced80e6775bc5668d9db415cdb46 (patch)
treeb600764a60f9978017a567390a025d2777b864a1 /src/vat/api_format.c
parent755042dec0fcc733d456adc2a74042c529eff039 (diff)
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
Diffstat (limited to 'src/vat/api_format.c')
-rw-r--r--src/vat/api_format.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/src/vat/api_format.c b/src/vat/api_format.c
index a759ba25b1f..4827d55815c 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 @@ void
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;