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513 lines
12 KiB
C
513 lines
12 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2008 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <glib.h>
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#include "glibintl.h"
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <gio/gio.h>
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static GResolver *resolver;
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static GCancellable *cancellable;
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static GMainLoop *loop;
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static int nlookups = 0;
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static void G_GNUC_NORETURN
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usage (void)
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{
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fprintf (stderr, "Usage: resolver [-t] [-s] [hostname | IP | service/protocol/domain ] ...\n");
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fprintf (stderr, " resolver [-t] [-s] -c [hostname | IP | service/protocol/domain ]\n");
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fprintf (stderr, " Use -t to enable threading.\n");
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fprintf (stderr, " Use -s to do synchronous lookups.\n");
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fprintf (stderr, " Both together will result in simultaneous lookups in multiple threads\n");
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fprintf (stderr, " Use -c (and only a single resolvable argument) to test GSocketConnectable.\n");
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exit (1);
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}
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G_LOCK_DEFINE_STATIC (response);
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static void
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done_lookup (void)
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{
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nlookups--;
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if (nlookups == 0)
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{
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/* In the sync case we need to make sure we don't call
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* g_main_loop_quit before the loop is actually running...
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*/
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g_idle_add ((GSourceFunc)g_main_loop_quit, loop);
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}
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}
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static void
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print_resolved_name (const char *phys,
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char *name,
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GError *error)
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{
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G_LOCK (response);
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printf ("Address: %s\n", phys);
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if (error)
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{
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printf ("Error: %s\n", error->message);
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g_error_free (error);
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}
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else
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{
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printf ("Name: %s\n", name);
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g_free (name);
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}
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printf ("\n");
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done_lookup ();
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G_UNLOCK (response);
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}
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static void
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print_resolved_addresses (const char *name,
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GList *addresses,
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GError *error)
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{
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char *phys;
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GList *a;
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G_LOCK (response);
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printf ("Name: %s\n", name);
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if (error)
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{
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printf ("Error: %s\n", error->message);
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g_error_free (error);
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}
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else
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{
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for (a = addresses; a; a = a->next)
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{
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phys = g_inet_address_to_string (a->data);
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printf ("Address: %s\n", phys);
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g_free (phys);
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g_object_unref (a->data);
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}
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g_list_free (addresses);
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}
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printf ("\n");
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done_lookup ();
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G_UNLOCK (response);
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}
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static void
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print_resolved_service (const char *service,
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GList *targets,
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GError *error)
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{
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GList *t;
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G_LOCK (response);
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printf ("Service: %s\n", service);
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if (error)
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{
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printf ("Error: %s\n", error->message);
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g_error_free (error);
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}
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else
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{
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for (t = targets; t; t = t->next)
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{
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printf ("%s:%u (pri %u, weight %u)\n",
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g_srv_target_get_hostname (t->data),
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g_srv_target_get_port (t->data),
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g_srv_target_get_priority (t->data),
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g_srv_target_get_weight (t->data));
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g_srv_target_free (t->data);
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}
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g_list_free (targets);
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}
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printf ("\n");
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done_lookup ();
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G_UNLOCK (response);
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}
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static void
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lookup_one_sync (const char *arg)
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{
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GError *error = NULL;
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if (strchr (arg, '/'))
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{
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GList *targets;
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/* service/protocol/domain */
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char **parts = g_strsplit (arg, "/", 3);
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if (!parts || !parts[2])
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usage ();
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targets = g_resolver_lookup_service (resolver,
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parts[0], parts[1], parts[2],
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cancellable, &error);
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print_resolved_service (arg, targets, error);
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}
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else if (g_hostname_is_ip_address (arg))
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{
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GInetAddress *addr = g_inet_address_new_from_string (arg);
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char *name;
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name = g_resolver_lookup_by_address (resolver, addr, cancellable, &error);
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print_resolved_name (arg, name, error);
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g_object_unref (addr);
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}
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else
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{
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GList *addresses;
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addresses = g_resolver_lookup_by_name (resolver, arg, cancellable, &error);
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print_resolved_addresses (arg, addresses, error);
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}
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}
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static gpointer
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lookup_thread (gpointer arg)
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{
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lookup_one_sync (arg);
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return NULL;
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}
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static void
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start_threaded_lookups (char **argv, int argc)
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{
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int i;
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for (i = 0; i < argc; i++)
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g_thread_create (lookup_thread, argv[i], FALSE, NULL);
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}
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static void
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start_sync_lookups (char **argv, int argc)
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{
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int i;
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for (i = 0; i < argc; i++)
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lookup_one_sync (argv[i]);
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}
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static void
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lookup_by_addr_callback (GObject *source, GAsyncResult *result,
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gpointer user_data)
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{
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const char *phys = user_data;
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GError *error = NULL;
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char *name;
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name = g_resolver_lookup_by_address_finish (resolver, result, &error);
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print_resolved_name (phys, name, error);
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}
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static void
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lookup_by_name_callback (GObject *source, GAsyncResult *result,
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gpointer user_data)
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{
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const char *name = user_data;
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GError *error = NULL;
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GList *addresses;
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addresses = g_resolver_lookup_by_name_finish (resolver, result, &error);
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print_resolved_addresses (name, addresses, error);
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}
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static void
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lookup_service_callback (GObject *source, GAsyncResult *result,
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gpointer user_data)
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{
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const char *service = user_data;
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GError *error = NULL;
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GList *targets;
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targets = g_resolver_lookup_service_finish (resolver, result, &error);
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print_resolved_service (service, targets, error);
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}
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static void
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start_async_lookups (char **argv, int argc)
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{
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int i;
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for (i = 0; i < argc; i++)
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{
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if (strchr (argv[i], '/'))
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{
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/* service/protocol/domain */
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char **parts = g_strsplit (argv[i], "/", 3);
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if (!parts || !parts[2])
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usage ();
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g_resolver_lookup_service_async (resolver,
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parts[0], parts[1], parts[2],
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cancellable,
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lookup_service_callback, argv[i]);
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}
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else if (g_hostname_is_ip_address (argv[i]))
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{
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GInetAddress *addr = g_inet_address_new_from_string (argv[i]);
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g_resolver_lookup_by_address_async (resolver, addr, cancellable,
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lookup_by_addr_callback, argv[i]);
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g_object_unref (addr);
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}
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else
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{
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g_resolver_lookup_by_name_async (resolver, argv[i], cancellable,
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lookup_by_name_callback,
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argv[i]);
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}
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/* Stress-test the reloading code */
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g_signal_emit_by_name (resolver, "reload");
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}
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}
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static void
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print_connectable_sockaddr (GSocketAddress *sockaddr,
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GError *error)
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{
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char *phys;
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if (error)
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{
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printf ("Error: %s\n", error->message);
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g_error_free (error);
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}
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else if (!G_IS_INET_SOCKET_ADDRESS (sockaddr))
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{
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printf ("Error: Unexpected sockaddr type '%s'\n", g_type_name_from_instance ((GTypeInstance *)sockaddr));
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g_object_unref (sockaddr);
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}
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else
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{
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GInetSocketAddress *isa = G_INET_SOCKET_ADDRESS (sockaddr);
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phys = g_inet_address_to_string (g_inet_socket_address_get_address (isa));
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printf ("Address: %s%s%s:%d\n",
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strchr (phys, ':') ? "[" : "", phys, strchr (phys, ':') ? "]" : "",
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g_inet_socket_address_get_port (isa));
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g_free (phys);
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g_object_unref (sockaddr);
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}
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}
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static void
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do_sync_connectable (GSocketAddressEnumerator *enumerator)
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{
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GSocketAddress *sockaddr;
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GError *error = NULL;
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while ((sockaddr = g_socket_address_enumerator_next (enumerator, cancellable, &error)))
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print_connectable_sockaddr (sockaddr, error);
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g_object_unref (enumerator);
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done_lookup ();
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}
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static void do_async_connectable (GSocketAddressEnumerator *enumerator);
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static void
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got_next_async (GObject *source, GAsyncResult *result, gpointer user_data)
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{
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GSocketAddressEnumerator *enumerator = G_SOCKET_ADDRESS_ENUMERATOR (source);
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GSocketAddress *sockaddr;
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GError *error = NULL;
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sockaddr = g_socket_address_enumerator_next_finish (enumerator, result, &error);
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if (sockaddr || error)
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print_connectable_sockaddr (sockaddr, error);
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if (sockaddr)
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do_async_connectable (enumerator);
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else
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{
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g_object_unref (enumerator);
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done_lookup ();
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}
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}
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static void
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do_async_connectable (GSocketAddressEnumerator *enumerator)
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{
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g_socket_address_enumerator_next_async (enumerator, cancellable,
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got_next_async, NULL);
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}
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static void
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do_connectable (const char *arg, gboolean synchronous)
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{
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char **parts;
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GSocketConnectable *connectable;
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GSocketAddressEnumerator *enumerator;
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if (strchr (arg, '/'))
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{
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/* service/protocol/domain */
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parts = g_strsplit (arg, "/", 3);
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if (!parts || !parts[2])
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usage ();
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connectable = g_network_service_new (parts[0], parts[1], parts[2]);
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}
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else
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{
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guint16 port;
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parts = g_strsplit (arg, ":", 2);
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if (parts && parts[1])
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{
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arg = parts[0];
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port = strtoul (parts[1], NULL, 10);
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}
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else
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port = 0;
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if (g_hostname_is_ip_address (arg))
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{
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GInetAddress *addr = g_inet_address_new_from_string (arg);
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GSocketAddress *sockaddr = g_inet_socket_address_new (addr, port);
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g_object_unref (addr);
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connectable = G_SOCKET_CONNECTABLE (sockaddr);
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}
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else
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connectable = g_network_address_new (arg, port);
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}
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enumerator = g_socket_connectable_enumerate (connectable);
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g_object_unref (connectable);
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if (synchronous)
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do_sync_connectable (enumerator);
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else
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do_async_connectable (enumerator);
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}
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#ifdef G_OS_UNIX
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static int cancel_fds[2];
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static void
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interrupted (int sig)
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{
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gssize c;
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signal (SIGINT, SIG_DFL);
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c = write (cancel_fds[1], "x", 1);
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g_assert_cmpint(c, ==, 1);
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}
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static gboolean
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async_cancel (GIOChannel *source, GIOCondition cond, gpointer cancel)
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{
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g_cancellable_cancel (cancel);
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return FALSE;
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}
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#endif
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int
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main (int argc, char **argv)
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{
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gboolean threaded = FALSE, synchronous = FALSE;
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gboolean use_connectable = FALSE;
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#ifdef G_OS_UNIX
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GIOChannel *chan;
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guint watch;
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#endif
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/* We can't use GOptionContext because we use the arguments to
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* decide whether or not to call g_thread_init().
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*/
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while (argc >= 2 && argv[1][0] == '-')
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{
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if (!strcmp (argv[1], "-t"))
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{
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g_thread_init (NULL);
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threaded = TRUE;
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}
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else if (!strcmp (argv[1], "-s"))
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synchronous = TRUE;
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else if (!strcmp (argv[1], "-c"))
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use_connectable = TRUE;
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else
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usage ();
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argv++;
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argc--;
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}
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g_type_init ();
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if (argc < 2 || (argc > 2 && use_connectable))
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usage ();
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resolver = g_resolver_get_default ();
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cancellable = g_cancellable_new ();
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#ifdef G_OS_UNIX
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/* Set up cancellation; we want to cancel if the user ^C's the
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* program, but we can't cancel directly from an interrupt.
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*/
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signal (SIGINT, interrupted);
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if (pipe (cancel_fds) == -1)
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{
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perror ("pipe");
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exit (1);
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}
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chan = g_io_channel_unix_new (cancel_fds[0]);
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watch = g_io_add_watch (chan, G_IO_IN, async_cancel, cancellable);
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g_io_channel_unref (chan);
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#endif
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nlookups = argc - 1;
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loop = g_main_loop_new (NULL, TRUE);
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if (use_connectable)
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do_connectable (argv[1], synchronous);
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else
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{
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if (threaded && synchronous)
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start_threaded_lookups (argv + 1, argc - 1);
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else if (synchronous)
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start_sync_lookups (argv + 1, argc - 1);
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else
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start_async_lookups (argv + 1, argc - 1);
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}
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g_main_loop_run (loop);
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g_main_loop_unref (loop);
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#ifdef G_OS_UNIX
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g_source_remove (watch);
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#endif
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g_object_unref (cancellable);
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return 0;
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}
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