tshark: Warn on overwriting protocol filter

Change-Id: I41a56cf384cda91fa6ed217f7c292f325ec8c07f
Reviewed-on: https://code.wireshark.org/review/34345
Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/tshark.c b/tshark.c
index b19cbf8dca..ee2be90fd3 100644
--- a/tshark.c
+++ b/tshark.c
@@ -1162,9 +1162,15 @@ main(int argc, char *argv[])
       }
       break;
     case 'j':
+      if (protocolfilter) {
+        cmdarg_err("-j or -J was already specified! Overwriting previous protocol filter");
+      }
       protocolfilter = wmem_strsplit(wmem_epan_scope(), optarg, " ", -1);
       break;
     case 'J':
+      if (protocolfilter) {
+        cmdarg_err("-j or -J was already specified! Overwriting previous protocol filter");
+      }
       protocolfilter_flags = PF_INCLUDE_CHILDREN;
       protocolfilter = wmem_strsplit(wmem_epan_scope(), optarg, " ", -1);
       break;