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/* bustle-pcap.c: utility to log D-Bus traffic to a pcap file.
*
* Copyright © 2011 Will Thompson <will@willthompson.co.uk>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include <glib.h>
#include <glib-unix.h>
#include <glib/gprintf.h>
#include <gio/gunixinputstream.h>
#include "pcap-monitor.h"
static gboolean verbose = FALSE;
static gboolean quiet = FALSE;
#if GLIB_CHECK_VERSION (2, 30, 0)
static void
let_me_quit (GMainLoop *loop)
{
g_unix_signal_add (SIGINT, (GSourceFunc) g_main_loop_quit, loop);
if (!quiet)
g_printf ("Hit Control-C to stop logging.\n");
}
#else
static gboolean
stdin_func (
GPollableInputStream *g_stdin,
GMainLoop *loop)
{
char buf[2];
if (g_pollable_input_stream_read_nonblocking (g_stdin, buf, 1, NULL, NULL)
!= -1)
{
g_main_loop_quit (loop);
return FALSE;
}
return TRUE;
}
static void
let_me_quit (GMainLoop *loop)
{
GInputStream *g_stdin = g_unix_input_stream_new (0, FALSE);
GSource *source = g_pollable_input_stream_create_source (
G_POLLABLE_INPUT_STREAM (g_stdin), NULL);
g_source_set_callback (source, (GSourceFunc) stdin_func, loop, NULL);
g_source_attach (source, NULL);
g_printf ("Hit Enter to stop logging. (Do not hit Control-C.)\n");
}
#endif
static gboolean session_specified = FALSE;
static gboolean system_specified = FALSE;
static gchar **filenames = NULL;
static GOptionEntry entries[] = {
{ "session", 'e', 0, G_OPTION_ARG_NONE, &session_specified,
"Monitor session bus (default)", NULL
},
{ "system", 'y', 0, G_OPTION_ARG_NONE, &system_specified,
"Monitor system bus", NULL
},
{ "verbose", 'v', 0, G_OPTION_ARG_NONE, &verbose,
"Print brief summaries of captured messages to stdout", NULL
},
{ "quiet", 'q', 0, G_OPTION_ARG_NONE, &quiet,
"Don't print out instructions", NULL
},
{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames,
"blah blah", NULL
},
{ NULL }
};
static void
parse_arguments (
int *argc,
char ***argv,
GBusType *bus_type,
gchar **filename)
{
GOptionContext *context;
gchar *usage;
GError *error = NULL;
gboolean ret;
context = g_option_context_new ("FILENAME - logs D-Bus traffic to FILENAME");
g_option_context_add_main_entries (context, entries, NULL);
ret = g_option_context_parse (context, argc, argv, &error);
usage = g_option_context_get_help (context, TRUE, NULL);
if (!ret)
{
fprintf (stderr, "%s\n", error->message);
fprintf (stderr, "%s", usage);
exit (2);
}
if (session_specified && system_specified)
{
fprintf (stderr, "You may only specify one of --session and --system\n");
fprintf (stderr, "%s", usage);
exit (2);
}
else if (system_specified)
{
*bus_type = G_BUS_TYPE_SYSTEM;
}
else
{
*bus_type = G_BUS_TYPE_SESSION;
}
if (filenames == NULL ||
filenames[0] == NULL ||
filenames[1] != NULL)
{
fprintf (stderr, "You must specify exactly one output filename\n");
fprintf (stderr, "%s", usage);
exit (2);
}
*filename = filenames[0];
}
static void
message_logged_cb (
BustlePcapMonitor *pcap,
GDBusMessage *message,
gboolean is_incoming,
glong sec,
glong usec,
guint8 *data,
guint len,
gpointer user_data)
{
g_print ("(%s) %s -> %s: %u %s\n",
is_incoming ? "incoming" : "outgoing",
g_dbus_message_get_sender (message),
g_dbus_message_get_destination (message),
g_dbus_message_get_message_type (message),
g_dbus_message_get_member (message));
}
int
main (
int argc,
char **argv)
{
GMainLoop *loop;
GBusType bus_type;
gchar *filename;
GError *error = NULL;
BustlePcapMonitor *pcap;
g_type_init ();
parse_arguments (&argc, &argv, &bus_type, &filename);
pcap = bustle_pcap_monitor_new (bus_type, filename, &error);
if (pcap == NULL)
{
fprintf (stderr, "%s", error->message);
exit (1);
}
if (verbose)
g_signal_connect (pcap, "message-logged",
G_CALLBACK (message_logged_cb), NULL);
loop = g_main_loop_new (NULL, FALSE);
if (!quiet)
g_printf ("Logging D-Bus traffic to '%s'...\n", filename);
let_me_quit (loop);
g_main_loop_run (loop);
g_main_loop_unref (loop);
bustle_pcap_monitor_stop (pcap);
g_object_unref (pcap);
return 0;
}
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