extcap: Convert settings to preference friendly key names

Preferences are only allowed to contain lowercase ASCII letters,
numbers, underscores or dot characters. Create a utility function
to convert an extcap setting to its equivalent preference key and
use it wherever conversion from setting to preference key is needed.

Bug: 12064
Change-Id: I39bbac7de5f0f905bd41c54257fa997a3b32442d
Reviewed-on: https://code.wireshark.org/review/13687
Petri-Dish: Pascal Quantin <pascal.quantin@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Roland Knall <rknall@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/extcap.h b/extcap.h
index b2b6b5fa43..823c04af3c 100644
--- a/extcap.h
+++ b/extcap.h
@@ -87,6 +87,9 @@ extcap_get_if_configuration(const char * ifname);
 gboolean
 extcap_has_configuration(const char * ifname, gboolean is_required);
 
+/* converts an extcap setting to its equivalent preference key */
+gchar * extcap_settings_key(const gchar * ifname, const gchar * setting);
+
 #ifdef WIN32
 HANDLE
 extcap_get_win32_handle();