Print extcap plugins with "tshark -G plugins".

This makes it match the "Plugins" tab of the "About" dialog.

While we're at it, use the same code to enumerate extcap plugins in that
dialog.

Change-Id: I50f402a7ab5d83d46baab070d145558ed8f688f4
Reviewed-on: https://code.wireshark.org/review/32589
Reviewed-by: Guy Harris <guy@alum.mit.edu>

1 files changed, 50 insertions, 5 deletions

diff --git a/extcap.c b/extcap.c
index 5a2cdf2adb..58ebe8075f 100644
--- a/extcap.c
+++ b/extcap.c
@@ -40,6 +40,7 @@
 #include <wsutil/file_util.h>
 #include <wsutil/filesystem.h>
 #include <wsutil/ws_pipe.h>
+#include <wsutil/ws_printf.h>
 #include <wsutil/tempfile.h>
 
 #include "capture_opts.h"
@@ -151,7 +152,7 @@ thread_pool_wait(thread_pool_t *pool)
     g_mutex_clear(&pool->data_mutex);
 }
 
-GHashTable *
+static GHashTable *
 extcap_loaded_interfaces(void)
 {
     if (prefs.capture_no_extcap)
@@ -175,6 +176,53 @@ extcap_clear_interfaces(void)
     _tool_for_ifname = NULL;
 }
 
+static gint
+compare_tools(gconstpointer a, gconstpointer b)
+{
+    return g_strcmp0((*(extcap_info *const *)a)->basename, (*(extcap_info *const *)b)->basename);
+}
+
+void
+extcap_get_descriptions(plugin_description_callback callback, void *callback_data)
+{
+    GHashTable * tools = extcap_loaded_interfaces();
+    GPtrArray *tools_array = g_ptr_array_new();
+
+    if (tools && g_hash_table_size(tools) > 0) {
+        GList * walker = g_list_first(g_hash_table_get_keys(tools));
+        while (walker && walker->data) {
+            extcap_info * tool = (extcap_info *)g_hash_table_lookup(tools, walker->data);
+            if (tool) {
+                g_ptr_array_add(tools_array, tool);
+            }
+            walker = g_list_next(walker);
+        }
+    }
+
+    g_ptr_array_sort(tools_array, compare_tools);
+
+    for (guint i = 0; i < tools_array->len; i++) {
+        extcap_info *tool = (extcap_info *)tools_array->pdata[i];
+        callback(tool->basename, tool->version, "extcap", tool->full_path, callback_data);
+    }
+
+    g_ptr_array_free(tools_array, TRUE);
+}
+
+static void
+print_extcap_description(const char *basename, const char *version,
+                        const char *description, const char *filename,
+                        void *user_data _U_)
+{
+    ws_debug_printf("%-16s\t%s\t%s\t%s\n", basename, version, description, filename);
+}
+
+void
+extcap_dump_all(void)
+{
+    extcap_get_descriptions(print_extcap_description, NULL);
+}
+
 /**
  * Obtains a list of extcap program paths. Use g_slist_free_full(paths, g_free)
  * to destroy the list.
@@ -1937,10 +1985,7 @@ extcap_list_interfaces_cb(thread_pool_t *pool, void *data, char *output)
 }
 
 
-/* Handles loading of the interfaces.
- *
- * A list of interfaces can be obtained by calling \ref extcap_loaded_interfaces
- */
+/* Handles loading of the interfaces. */
 static void
 extcap_load_interface_list(void)
 {