extcap: Provide capture filter to extcap binary

Added the option --extcap-capture-filter to extcap to send the capture filter
from the main screen to the extcap binary.

Change-Id: I75f0d7dbec810551225377f9221053298488cdd5
Reviewed-on: https://code.wireshark.org/review/11423
Reviewed-by: Roland Knall <rknall@gmail.com>
Reviewed-by: Stig Bjørlykke <stig@bjorlykke.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/extcap.c b/extcap.c
index 013389c0fc..1e89a5ce41 100644
--- a/extcap.c
+++ b/extcap.c
@@ -583,6 +583,10 @@ extcaps_init_initerfaces(capture_options *capture_opts)
         add_arg(EXTCAP_ARGUMENT_RUN_CAPTURE);
         add_arg(EXTCAP_ARGUMENT_INTERFACE);
         add_arg(interface_opts.name);
+        if (interface_opts.cfilter) {
+            add_arg(EXTCAP_ARGUMENT_CAPTURE_FILTER);
+            add_arg(interface_opts.cfilter);
+        }
         add_arg(EXTCAP_ARGUMENT_RUN_PIPE);
         add_arg(interface_opts.extcap_fifo);
         if (interface_opts.extcap_args == NULL)