Qt: Add interface toolbar support

An extcap utility can provide configuration for controls to use in a
GUI interface toolbar.  This controls are bidirectional and can be
used to control the extcap utility while capturing.

This is useful in scenarios where configuration can be done based on
findings in the capture process, setting temporary values or give other
inputs without restarting current capture.

Todo:
- Add support for Windows

Change-Id: Ie15fa67f92eb27d8b73df6bb36f66b9a7d81932d
Reviewed-on: https://code.wireshark.org/review/19982
Petri-Dish: Stig Bjørlykke <stig@bjorlykke.org>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Stig Bjørlykke <stig@bjorlykke.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/capture_opts.h b/capture_opts.h
index 780bbca526..d9ab3d86ab 100644
--- a/capture_opts.h
+++ b/capture_opts.h
@@ -226,6 +226,8 @@ typedef struct interface_options_tag {
     GPid              extcap_pid;           /* pid of running process or INVALID_EXTCAP_PID */
     gpointer          extcap_userdata;
     guint             extcap_child_watch;
+    gchar            *extcap_control_in;
+    gchar            *extcap_control_out;
 #endif
 #ifdef CAN_SET_CAPTURE_BUFFER_SIZE
     int               buffer_size;