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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/vcl
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/vcl')
-rw-r--r--src/vcl/vcl_bapi.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/vcl/vcl_bapi.c b/src/vcl/vcl_bapi.c
index 72440989727..bb2b94f04d8 100644
--- a/src/vcl/vcl_bapi.c
+++ b/src/vcl/vcl_bapi.c
@@ -276,6 +276,10 @@ vl_api_app_del_cert_key_pair_reply_t_handler (
#include <vnet/session/session.api.h>
#undef vl_endianfun
+#define vl_calcsizefun
+#include <vnet/session/session.api.h>
+#undef vl_calcsizefun
+
/* instantiate all the print functions we know about */
#define vl_printfun
#include <vnet/session/session.api.h>
@@ -303,7 +307,8 @@ vcl_bapi_hookup (void)
REPLY_MSG_ID_BASE + VL_API_##N, #n, vl_api_##n##_t_handler, \
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_tojson, vl_api_##n##_t_fromjson, \
+ vl_api_##n##_t_calc_size);
foreach_sock_msg;
#undef _
}