extcap: Add tool-specified helppage

Allow the tool to provide a link to a helppage, displayed
by clicking on help in the configuration dialog.

The URL will be opened using an URL based service, therefore local
as well as remote URLs are possible.

Change-Id: I58b30244e97919d5cf6892faf96536ddc30fb5a7
Reviewed-on: https://code.wireshark.org/review/17549
Reviewed-by: Roland Knall <rknall@gmail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/extcap.h b/extcap.h
index 254bd9fa3a..5a78d214d8 100644
--- a/extcap.h
+++ b/extcap.h
@@ -75,6 +75,10 @@ extcap_get_if_dlts(const gchar * ifname, char ** err_str);
 GList *
 append_extcap_interface_list(GList *list, char **err_str);
 
+/* return the help page or NULL for the given ifname */
+gchar *
+extcap_get_help_for_ifname(const char *ifname);
+
 /* get a list of all available extcap tools */
 GHashTable *
 extcap_tools_list(void);